| /* Everything about breakpoints, for GDB. |
| |
| Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
| 2008, 2009 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include <ctype.h> |
| #include "hashtab.h" |
| #include "symtab.h" |
| #include "frame.h" |
| #include "breakpoint.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "gdbcore.h" |
| #include "gdbcmd.h" |
| #include "value.h" |
| #include "command.h" |
| #include "inferior.h" |
| #include "gdbthread.h" |
| #include "target.h" |
| #include "language.h" |
| #include "gdb_string.h" |
| #include "demangle.h" |
| #include "annotate.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "source.h" |
| #include "linespec.h" |
| #include "completer.h" |
| #include "gdb.h" |
| #include "ui-out.h" |
| #include "cli/cli-script.h" |
| #include "gdb_assert.h" |
| #include "block.h" |
| #include "solib.h" |
| #include "solist.h" |
| #include "observer.h" |
| #include "exceptions.h" |
| #include "memattr.h" |
| #include "ada-lang.h" |
| #include "top.h" |
| #include "wrapper.h" |
| #include "valprint.h" |
| |
| #include "mi/mi-common.h" |
| |
| /* Arguments to pass as context to some catch command handlers. */ |
| #define CATCH_PERMANENT ((void *) (uintptr_t) 0) |
| #define CATCH_TEMPORARY ((void *) (uintptr_t) 1) |
| |
| /* Prototypes for local functions. */ |
| |
| static void enable_delete_command (char *, int); |
| |
| static void enable_delete_breakpoint (struct breakpoint *); |
| |
| static void enable_once_command (char *, int); |
| |
| static void enable_once_breakpoint (struct breakpoint *); |
| |
| static void disable_command (char *, int); |
| |
| static void enable_command (char *, int); |
| |
| static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *)); |
| |
| static void ignore_command (char *, int); |
| |
| static int breakpoint_re_set_one (void *); |
| |
| static void clear_command (char *, int); |
| |
| static void catch_command (char *, int); |
| |
| static void watch_command (char *, int); |
| |
| static int can_use_hardware_watchpoint (struct value *); |
| |
| static void break_command_1 (char *, int, int); |
| |
| static void mention (struct breakpoint *); |
| |
| struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype); |
| |
| static void check_duplicates (struct breakpoint *); |
| |
| static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int); |
| |
| static CORE_ADDR adjust_breakpoint_address (CORE_ADDR bpaddr, |
| enum bptype bptype); |
| |
| static void describe_other_breakpoints (CORE_ADDR, struct obj_section *, int); |
| |
| static void breakpoints_info (char *, int); |
| |
| static void breakpoint_1 (int, int); |
| |
| static bpstat bpstat_alloc (const struct bp_location *, bpstat); |
| |
| static int breakpoint_cond_eval (void *); |
| |
| static void cleanup_executing_breakpoints (void *); |
| |
| static void commands_command (char *, int); |
| |
| static void condition_command (char *, int); |
| |
| static int get_number_trailer (char **, int); |
| |
| void set_breakpoint_count (int); |
| |
| typedef enum |
| { |
| mark_inserted, |
| mark_uninserted |
| } |
| insertion_state_t; |
| |
| static int remove_breakpoint (struct bp_location *, insertion_state_t); |
| |
| static enum print_stop_action print_it_typical (bpstat); |
| |
| static enum print_stop_action print_bp_stop_message (bpstat bs); |
| |
| static int watchpoint_check (void *); |
| |
| static void maintenance_info_breakpoints (char *, int); |
| |
| static void create_overlay_event_breakpoint (char *); |
| |
| static int hw_breakpoint_used_count (void); |
| |
| static int hw_watchpoint_used_count (enum bptype, int *); |
| |
| static void hbreak_command (char *, int); |
| |
| static void thbreak_command (char *, int); |
| |
| static void watch_command_1 (char *, int, int); |
| |
| static void rwatch_command (char *, int); |
| |
| static void awatch_command (char *, int); |
| |
| static void do_enable_breakpoint (struct breakpoint *, enum bpdisp); |
| |
| static void stop_command (char *arg, int from_tty); |
| |
| static void stopin_command (char *arg, int from_tty); |
| |
| static void stopat_command (char *arg, int from_tty); |
| |
| static char *ep_parse_optional_if_clause (char **arg); |
| |
| static char *ep_parse_optional_filename (char **arg); |
| |
| static void catch_exception_command_1 (enum exception_event_kind ex_event, |
| char *arg, int tempflag, int from_tty); |
| |
| static void tcatch_command (char *arg, int from_tty); |
| |
| static void ep_skip_leading_whitespace (char **s); |
| |
| static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc); |
| |
| static void free_bp_location (struct bp_location *loc); |
| |
| static struct bp_location *allocate_bp_location (struct breakpoint *bpt); |
| |
| static void update_global_location_list (int); |
| |
| static void update_global_location_list_nothrow (int); |
| |
| static int is_hardware_watchpoint (struct breakpoint *bpt); |
| |
| static void insert_breakpoint_locations (void); |
| |
| static const char * |
| bpdisp_text (enum bpdisp disp) |
| { |
| /* NOTE: the following values are a part of MI protocol and represent |
| values of 'disp' field returned when inferior stops at a breakpoint. */ |
| static char *bpdisps[] = {"del", "dstp", "dis", "keep"}; |
| return bpdisps[(int) disp]; |
| } |
| |
| /* Prototypes for exported functions. */ |
| /* If FALSE, gdb will not use hardware support for watchpoints, even |
| if such is available. */ |
| static int can_use_hw_watchpoints; |
| |
| static void |
| show_can_use_hw_watchpoints (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| fprintf_filtered (file, _("\ |
| Debugger's willingness to use watchpoint hardware is %s.\n"), |
| value); |
| } |
| |
| /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints. |
| If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints |
| for unrecognized breakpoint locations. |
| If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */ |
| static enum auto_boolean pending_break_support; |
| static void |
| show_pending_break_support (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| fprintf_filtered (file, _("\ |
| Debugger's behavior regarding pending breakpoints is %s.\n"), |
| value); |
| } |
| |
| /* If 1, gdb will automatically use hardware breakpoints for breakpoints |
| set with "break" but falling in read-only memory. |
| If 0, gdb will warn about such breakpoints, but won't automatically |
| use hardware breakpoints. */ |
| static int automatic_hardware_breakpoints; |
| static void |
| show_automatic_hardware_breakpoints (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| fprintf_filtered (file, _("\ |
| Automatic usage of hardware breakpoints is %s.\n"), |
| value); |
| } |
| |
| /* If on, gdb will keep breakpoints inserted even as inferior is |
| stopped, and immediately insert any new breakpoints. If off, gdb |
| will insert breakpoints into inferior only when resuming it, and |
| will remove breakpoints upon stop. If auto, GDB will behave as ON |
| if in non-stop mode, and as OFF if all-stop mode.*/ |
| |
| static const char always_inserted_auto[] = "auto"; |
| static const char always_inserted_on[] = "on"; |
| static const char always_inserted_off[] = "off"; |
| static const char *always_inserted_enums[] = { |
| always_inserted_auto, |
| always_inserted_off, |
| always_inserted_on, |
| NULL |
| }; |
| static const char *always_inserted_mode = always_inserted_auto; |
| static void |
| show_always_inserted_mode (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| if (always_inserted_mode == always_inserted_auto) |
| fprintf_filtered (file, _("\ |
| Always inserted breakpoint mode is %s (currently %s).\n"), |
| value, |
| breakpoints_always_inserted_mode () ? "on" : "off"); |
| else |
| fprintf_filtered (file, _("Always inserted breakpoint mode is %s.\n"), value); |
| } |
| |
| int |
| breakpoints_always_inserted_mode (void) |
| { |
| return (always_inserted_mode == always_inserted_on |
| || (always_inserted_mode == always_inserted_auto && non_stop)); |
| } |
| |
| void _initialize_breakpoint (void); |
| |
| /* Are we executing breakpoint commands? */ |
| static int executing_breakpoint_commands; |
| |
| /* Are overlay event breakpoints enabled? */ |
| static int overlay_events_enabled; |
| |
| /* Walk the following statement or block through all breakpoints. |
| ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current |
| breakpoint. */ |
| |
| #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next) |
| |
| #define ALL_BREAKPOINTS_SAFE(B,TMP) \ |
| for (B = breakpoint_chain; \ |
| B ? (TMP=B->next, 1): 0; \ |
| B = TMP) |
| |
| /* Similar iterators for the low-level breakpoints. */ |
| |
| #define ALL_BP_LOCATIONS(B) for (B = bp_location_chain; B; B = B->global_next) |
| |
| #define ALL_BP_LOCATIONS_SAFE(B,TMP) \ |
| for (B = bp_location_chain; \ |
| B ? (TMP=B->global_next, 1): 0; \ |
| B = TMP) |
| |
| /* Chains of all breakpoints defined. */ |
| |
| struct breakpoint *breakpoint_chain; |
| |
| struct bp_location *bp_location_chain; |
| |
| /* The locations that no longer correspond to any breakpoint, |
| unlinked from bp_location_chain, but for which a hit |
| may still be reported by a target. */ |
| VEC(bp_location_p) *moribund_locations = NULL; |
| |
| /* Number of last breakpoint made. */ |
| |
| int breakpoint_count; |
| |
| /* Return whether a breakpoint is an active enabled breakpoint. */ |
| static int |
| breakpoint_enabled (struct breakpoint *b) |
| { |
| return (b->enable_state == bp_enabled); |
| } |
| |
| /* Set breakpoint count to NUM. */ |
| |
| void |
| set_breakpoint_count (int num) |
| { |
| breakpoint_count = num; |
| set_internalvar (lookup_internalvar ("bpnum"), |
| value_from_longest (builtin_type_int32, (LONGEST) num)); |
| } |
| |
| /* Used in run_command to zero the hit count when a new run starts. */ |
| |
| void |
| clear_breakpoint_hit_counts (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| b->hit_count = 0; |
| } |
| |
| /* Default address, symtab and line to put a breakpoint at |
| for "break" command with no arg. |
| if default_breakpoint_valid is zero, the other three are |
| not valid, and "break" with no arg is an error. |
| |
| This set by print_stack_frame, which calls set_default_breakpoint. */ |
| |
| int default_breakpoint_valid; |
| CORE_ADDR default_breakpoint_address; |
| struct symtab *default_breakpoint_symtab; |
| int default_breakpoint_line; |
| |
| /* *PP is a string denoting a breakpoint. Get the number of the breakpoint. |
| Advance *PP after the string and any trailing whitespace. |
| |
| Currently the string can either be a number or "$" followed by the name |
| of a convenience variable. Making it an expression wouldn't work well |
| for map_breakpoint_numbers (e.g. "4 + 5 + 6"). |
| |
| If the string is a NULL pointer, that denotes the last breakpoint. |
| |
| TRAILER is a character which can be found after the number; most |
| commonly this is `-'. If you don't want a trailer, use \0. */ |
| static int |
| get_number_trailer (char **pp, int trailer) |
| { |
| int retval = 0; /* default */ |
| char *p = *pp; |
| |
| if (p == NULL) |
| /* Empty line means refer to the last breakpoint. */ |
| return breakpoint_count; |
| else if (*p == '$') |
| { |
| /* Make a copy of the name, so we can null-terminate it |
| to pass to lookup_internalvar(). */ |
| char *varname; |
| char *start = ++p; |
| struct value *val; |
| |
| while (isalnum (*p) || *p == '_') |
| p++; |
| varname = (char *) alloca (p - start + 1); |
| strncpy (varname, start, p - start); |
| varname[p - start] = '\0'; |
| val = value_of_internalvar (lookup_internalvar (varname)); |
| if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT) |
| retval = (int) value_as_long (val); |
| else |
| { |
| printf_filtered (_("Convenience variable must have integer value.\n")); |
| retval = 0; |
| } |
| } |
| else |
| { |
| if (*p == '-') |
| ++p; |
| while (*p >= '0' && *p <= '9') |
| ++p; |
| if (p == *pp) |
| /* There is no number here. (e.g. "cond a == b"). */ |
| { |
| /* Skip non-numeric token */ |
| while (*p && !isspace((int) *p)) |
| ++p; |
| /* Return zero, which caller must interpret as error. */ |
| retval = 0; |
| } |
| else |
| retval = atoi (*pp); |
| } |
| if (!(isspace (*p) || *p == '\0' || *p == trailer)) |
| { |
| /* Trailing junk: return 0 and let caller print error msg. */ |
| while (!(isspace (*p) || *p == '\0' || *p == trailer)) |
| ++p; |
| retval = 0; |
| } |
| while (isspace (*p)) |
| p++; |
| *pp = p; |
| return retval; |
| } |
| |
| |
| /* Like get_number_trailer, but don't allow a trailer. */ |
| int |
| get_number (char **pp) |
| { |
| return get_number_trailer (pp, '\0'); |
| } |
| |
| /* Parse a number or a range. |
| * A number will be of the form handled by get_number. |
| * A range will be of the form <number1> - <number2>, and |
| * will represent all the integers between number1 and number2, |
| * inclusive. |
| * |
| * While processing a range, this fuction is called iteratively; |
| * At each call it will return the next value in the range. |
| * |
| * At the beginning of parsing a range, the char pointer PP will |
| * be advanced past <number1> and left pointing at the '-' token. |
| * Subsequent calls will not advance the pointer until the range |
| * is completed. The call that completes the range will advance |
| * pointer PP past <number2>. |
| */ |
| |
| int |
| get_number_or_range (char **pp) |
| { |
| static int last_retval, end_value; |
| static char *end_ptr; |
| static int in_range = 0; |
| |
| if (**pp != '-') |
| { |
| /* Default case: pp is pointing either to a solo number, |
| or to the first number of a range. */ |
| last_retval = get_number_trailer (pp, '-'); |
| if (**pp == '-') |
| { |
| char **temp; |
| |
| /* This is the start of a range (<number1> - <number2>). |
| Skip the '-', parse and remember the second number, |
| and also remember the end of the final token. */ |
| |
| temp = &end_ptr; |
| end_ptr = *pp + 1; |
| while (isspace ((int) *end_ptr)) |
| end_ptr++; /* skip white space */ |
| end_value = get_number (temp); |
| if (end_value < last_retval) |
| { |
| error (_("inverted range")); |
| } |
| else if (end_value == last_retval) |
| { |
| /* degenerate range (number1 == number2). Advance the |
| token pointer so that the range will be treated as a |
| single number. */ |
| *pp = end_ptr; |
| } |
| else |
| in_range = 1; |
| } |
| } |
| else if (! in_range) |
| error (_("negative value")); |
| else |
| { |
| /* pp points to the '-' that betokens a range. All |
| number-parsing has already been done. Return the next |
| integer value (one greater than the saved previous value). |
| Do not advance the token pointer 'pp' until the end of range |
| is reached. */ |
| |
| if (++last_retval == end_value) |
| { |
| /* End of range reached; advance token pointer. */ |
| *pp = end_ptr; |
| in_range = 0; |
| } |
| } |
| return last_retval; |
| } |
| |
| |
| |
| /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| |
| static void |
| condition_command (char *arg, int from_tty) |
| { |
| struct breakpoint *b; |
| char *p; |
| int bnum; |
| |
| if (arg == 0) |
| error_no_arg (_("breakpoint number")); |
| |
| p = arg; |
| bnum = get_number (&p); |
| if (bnum == 0) |
| error (_("Bad breakpoint argument: '%s'"), arg); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bnum) |
| { |
| struct bp_location *loc = b->loc; |
| for (; loc; loc = loc->next) |
| { |
| if (loc->cond) |
| { |
| xfree (loc->cond); |
| loc->cond = 0; |
| } |
| } |
| if (b->cond_string != NULL) |
| xfree (b->cond_string); |
| |
| if (*p == 0) |
| { |
| b->cond_string = NULL; |
| if (from_tty) |
| printf_filtered (_("Breakpoint %d now unconditional.\n"), bnum); |
| } |
| else |
| { |
| arg = p; |
| /* I don't know if it matters whether this is the string the user |
| typed in or the decompiled expression. */ |
| b->cond_string = savestring (arg, strlen (arg)); |
| b->condition_not_parsed = 0; |
| for (loc = b->loc; loc; loc = loc->next) |
| { |
| arg = p; |
| loc->cond = |
| parse_exp_1 (&arg, block_for_pc (loc->address), 0); |
| if (*arg) |
| error (_("Junk at end of expression")); |
| } |
| } |
| breakpoints_changed (); |
| observer_notify_breakpoint_modified (b->number); |
| return; |
| } |
| |
| error (_("No breakpoint number %d."), bnum); |
| } |
| |
| static void |
| commands_command (char *arg, int from_tty) |
| { |
| struct breakpoint *b; |
| char *p; |
| int bnum; |
| struct command_line *l; |
| |
| /* If we allowed this, we would have problems with when to |
| free the storage, if we change the commands currently |
| being read from. */ |
| |
| if (executing_breakpoint_commands) |
| error (_("Can't use the \"commands\" command among a breakpoint's commands.")); |
| |
| p = arg; |
| bnum = get_number (&p); |
| |
| if (p && *p) |
| error (_("Unexpected extra arguments following breakpoint number.")); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bnum) |
| { |
| char *tmpbuf = xstrprintf ("Type commands for when breakpoint %d is hit, one per line.", |
| bnum); |
| struct cleanup *cleanups = make_cleanup (xfree, tmpbuf); |
| l = read_command_lines (tmpbuf, from_tty, 1); |
| do_cleanups (cleanups); |
| free_command_lines (&b->commands); |
| b->commands = l; |
| breakpoints_changed (); |
| observer_notify_breakpoint_modified (b->number); |
| return; |
| } |
| error (_("No breakpoint number %d."), bnum); |
| } |
| |
| /* Like commands_command, but instead of reading the commands from |
| input stream, takes them from an already parsed command structure. |
| |
| This is used by cli-script.c to DTRT with breakpoint commands |
| that are part of if and while bodies. */ |
| enum command_control_type |
| commands_from_control_command (char *arg, struct command_line *cmd) |
| { |
| struct breakpoint *b; |
| char *p; |
| int bnum; |
| |
| /* If we allowed this, we would have problems with when to |
| free the storage, if we change the commands currently |
| being read from. */ |
| |
| if (executing_breakpoint_commands) |
| error (_("Can't use the \"commands\" command among a breakpoint's commands.")); |
| |
| /* An empty string for the breakpoint number means the last |
| breakpoint, but get_number expects a NULL pointer. */ |
| if (arg && !*arg) |
| p = NULL; |
| else |
| p = arg; |
| bnum = get_number (&p); |
| |
| if (p && *p) |
| error (_("Unexpected extra arguments following breakpoint number.")); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bnum) |
| { |
| free_command_lines (&b->commands); |
| if (cmd->body_count != 1) |
| error (_("Invalid \"commands\" block structure.")); |
| /* We need to copy the commands because if/while will free the |
| list after it finishes execution. */ |
| b->commands = copy_command_lines (cmd->body_list[0]); |
| breakpoints_changed (); |
| observer_notify_breakpoint_modified (b->number); |
| return simple_control; |
| } |
| error (_("No breakpoint number %d."), bnum); |
| } |
| |
| /* Update BUF, which is LEN bytes read from the target address MEMADDR, |
| by replacing any memory breakpoints with their shadowed contents. */ |
| |
| void |
| breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr, LONGEST len) |
| { |
| struct bp_location *b; |
| CORE_ADDR bp_addr = 0; |
| int bp_size = 0; |
| int bptoffset = 0; |
| |
| ALL_BP_LOCATIONS (b) |
| { |
| if (b->owner->type == bp_none) |
| warning (_("reading through apparently deleted breakpoint #%d?"), |
| b->owner->number); |
| |
| if (b->loc_type != bp_loc_software_breakpoint) |
| continue; |
| if (!b->inserted) |
| continue; |
| /* Addresses and length of the part of the breakpoint that |
| we need to copy. */ |
| bp_addr = b->target_info.placed_address; |
| bp_size = b->target_info.shadow_len; |
| if (bp_size == 0) |
| /* bp isn't valid, or doesn't shadow memory. */ |
| continue; |
| |
| if (bp_addr + bp_size <= memaddr) |
| /* The breakpoint is entirely before the chunk of memory we |
| are reading. */ |
| continue; |
| |
| if (bp_addr >= memaddr + len) |
| /* The breakpoint is entirely after the chunk of memory we are |
| reading. */ |
| continue; |
| |
| /* Offset within shadow_contents. */ |
| if (bp_addr < memaddr) |
| { |
| /* Only copy the second part of the breakpoint. */ |
| bp_size -= memaddr - bp_addr; |
| bptoffset = memaddr - bp_addr; |
| bp_addr = memaddr; |
| } |
| |
| if (bp_addr + bp_size > memaddr + len) |
| { |
| /* Only copy the first part of the breakpoint. */ |
| bp_size -= (bp_addr + bp_size) - (memaddr + len); |
| } |
| |
| memcpy (buf + bp_addr - memaddr, |
| b->target_info.shadow_contents + bptoffset, bp_size); |
| } |
| } |
| |
| |
| /* A wrapper function for inserting catchpoints. */ |
| static void |
| insert_catchpoint (struct ui_out *uo, void *args) |
| { |
| struct breakpoint *b = (struct breakpoint *) args; |
| int val = -1; |
| |
| gdb_assert (b->type == bp_catchpoint); |
| gdb_assert (b->ops != NULL && b->ops->insert != NULL); |
| |
| b->ops->insert (b); |
| } |
| |
| static int |
| is_hardware_watchpoint (struct breakpoint *bpt) |
| { |
| return (bpt->type == bp_hardware_watchpoint |
| || bpt->type == bp_read_watchpoint |
| || bpt->type == bp_access_watchpoint); |
| } |
| |
| /* Find the current value of a watchpoint on EXP. Return the value in |
| *VALP and *RESULTP and the chain of intermediate and final values |
| in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does |
| not need them. |
| |
| If a memory error occurs while evaluating the expression, *RESULTP will |
| be set to NULL. *RESULTP may be a lazy value, if the result could |
| not be read from memory. It is used to determine whether a value |
| is user-specified (we should watch the whole value) or intermediate |
| (we should watch only the bit used to locate the final value). |
| |
| If the final value, or any intermediate value, could not be read |
| from memory, *VALP will be set to NULL. *VAL_CHAIN will still be |
| set to any referenced values. *VALP will never be a lazy value. |
| This is the value which we store in struct breakpoint. |
| |
| If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the |
| value chain. The caller must free the values individually. If |
| VAL_CHAIN is NULL, all generated values will be left on the value |
| chain. */ |
| |
| static void |
| fetch_watchpoint_value (struct expression *exp, struct value **valp, |
| struct value **resultp, struct value **val_chain) |
| { |
| struct value *mark, *new_mark, *result; |
| volatile struct gdb_exception ex; |
| |
| *valp = NULL; |
| if (resultp) |
| *resultp = NULL; |
| if (val_chain) |
| *val_chain = NULL; |
| |
| /* Evaluate the expression. */ |
| mark = value_mark (); |
| result = NULL; |
| |
| TRY_CATCH (ex, RETURN_MASK_ALL) |
| { |
| result = evaluate_expression (exp); |
| } |
| if (ex.reason < 0) |
| { |
| /* Ignore memory errors, we want watchpoints pointing at |
| inaccessible memory to still be created; otherwise, throw the |
| error to some higher catcher. */ |
| switch (ex.error) |
| { |
| case MEMORY_ERROR: |
| break; |
| default: |
| throw_exception (ex); |
| break; |
| } |
| } |
| |
| new_mark = value_mark (); |
| if (mark == new_mark) |
| return; |
| if (resultp) |
| *resultp = result; |
| |
| /* Make sure it's not lazy, so that after the target stops again we |
| have a non-lazy previous value to compare with. */ |
| if (result != NULL |
| && (!value_lazy (result) || gdb_value_fetch_lazy (result))) |
| *valp = result; |
| |
| if (val_chain) |
| { |
| /* Return the chain of intermediate values. We use this to |
| decide which addresses to watch. */ |
| *val_chain = new_mark; |
| value_release_to_mark (mark); |
| } |
| } |
| |
| /* Assuming that B is a watchpoint: |
| - Reparse watchpoint expression, if REPARSE is non-zero |
| - Evaluate expression and store the result in B->val |
| - Evaluate the condition if there is one, and store the result |
| in b->loc->cond. |
| - Update the list of values that must be watched in B->loc. |
| |
| If the watchpoint is disabled, do nothing. If this is |
| local watchpoint that is out of scope, delete it. */ |
| static void |
| update_watchpoint (struct breakpoint *b, int reparse) |
| { |
| int within_current_scope; |
| struct frame_id saved_frame_id; |
| struct bp_location *loc; |
| bpstat bs; |
| |
| /* We don't free locations. They are stored in bp_location_chain and |
| update_global_locations will eventually delete them and remove |
| breakpoints if needed. */ |
| b->loc = NULL; |
| |
| if (b->disposition == disp_del_at_next_stop) |
| return; |
| |
| /* Save the current frame's ID so we can restore it after |
| evaluating the watchpoint expression on its own frame. */ |
| /* FIXME drow/2003-09-09: It would be nice if evaluate_expression |
| took a frame parameter, so that we didn't have to change the |
| selected frame. */ |
| saved_frame_id = get_frame_id (get_selected_frame (NULL)); |
| |
| /* Determine if the watchpoint is within scope. */ |
| if (b->exp_valid_block == NULL) |
| within_current_scope = 1; |
| else |
| { |
| struct frame_info *fi; |
| fi = frame_find_by_id (b->watchpoint_frame); |
| within_current_scope = (fi != NULL); |
| if (within_current_scope) |
| select_frame (fi); |
| } |
| |
| if (within_current_scope && reparse) |
| { |
| char *s; |
| if (b->exp) |
| { |
| xfree (b->exp); |
| b->exp = NULL; |
| } |
| s = b->exp_string; |
| b->exp = parse_exp_1 (&s, b->exp_valid_block, 0); |
| /* If the meaning of expression itself changed, the old value is |
| no longer relevant. We don't want to report a watchpoint hit |
| to the user when the old value and the new value may actually |
| be completely different objects. */ |
| value_free (b->val); |
| b->val = NULL; |
| b->val_valid = 0; |
| } |
| |
| /* If we failed to parse the expression, for example because |
| it refers to a global variable in a not-yet-loaded shared library, |
| don't try to insert watchpoint. We don't automatically delete |
| such watchpoint, though, since failure to parse expression |
| is different from out-of-scope watchpoint. */ |
| if (within_current_scope && b->exp) |
| { |
| struct value *val_chain, *v, *result, *next; |
| |
| fetch_watchpoint_value (b->exp, &v, &result, &val_chain); |
| |
| /* Avoid setting b->val if it's already set. The meaning of |
| b->val is 'the last value' user saw, and we should update |
| it only if we reported that last value to user. As it |
| happens, the code that reports it updates b->val directly. */ |
| if (!b->val_valid) |
| { |
| b->val = v; |
| b->val_valid = 1; |
| } |
| |
| /* Change the type of breakpoint between hardware assisted or an |
| ordinary watchpoint depending on the hardware support and free |
| hardware slots. REPARSE is set when the inferior is started. */ |
| if ((b->type == bp_watchpoint || b->type == bp_hardware_watchpoint) |
| && reparse) |
| { |
| int i, mem_cnt, other_type_used; |
| |
| i = hw_watchpoint_used_count (bp_hardware_watchpoint, |
| &other_type_used); |
| mem_cnt = can_use_hardware_watchpoint (val_chain); |
| |
| if (!mem_cnt) |
| b->type = bp_watchpoint; |
| else |
| { |
| int target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT |
| (bp_hardware_watchpoint, i + mem_cnt, other_type_used); |
| if (target_resources_ok <= 0) |
| b->type = bp_watchpoint; |
| else |
| b->type = bp_hardware_watchpoint; |
| } |
| } |
| |
| /* Look at each value on the value chain. */ |
| for (v = val_chain; v; v = next) |
| { |
| /* If it's a memory location, and GDB actually needed |
| its contents to evaluate the expression, then we |
| must watch it. If the first value returned is |
| still lazy, that means an error occurred reading it; |
| watch it anyway in case it becomes readable. */ |
| if (VALUE_LVAL (v) == lval_memory |
| && (v == val_chain || ! value_lazy (v))) |
| { |
| struct type *vtype = check_typedef (value_type (v)); |
| |
| /* We only watch structs and arrays if user asked |
| for it explicitly, never if they just happen to |
| appear in the middle of some value chain. */ |
| if (v == result |
| || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| { |
| CORE_ADDR addr; |
| int len, type; |
| struct bp_location *loc, **tmp; |
| |
| addr = VALUE_ADDRESS (v) + value_offset (v); |
| len = TYPE_LENGTH (value_type (v)); |
| type = hw_write; |
| if (b->type == bp_read_watchpoint) |
| type = hw_read; |
| else if (b->type == bp_access_watchpoint) |
| type = hw_access; |
| |
| loc = allocate_bp_location (b); |
| for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next)) |
| ; |
| *tmp = loc; |
| loc->address = addr; |
| loc->length = len; |
| loc->watchpoint_type = type; |
| } |
| } |
| |
| next = value_next (v); |
| if (v != b->val) |
| value_free (v); |
| } |
| |
| /* We just regenerated the list of breakpoint locations. |
| The new location does not have its condition field set to anything |
| and therefore, we must always reparse the cond_string, independently |
| of the value of the reparse flag. */ |
| if (b->cond_string != NULL) |
| { |
| char *s = b->cond_string; |
| b->loc->cond = parse_exp_1 (&s, b->exp_valid_block, 0); |
| } |
| } |
| else if (!within_current_scope) |
| { |
| printf_filtered (_("\ |
| Watchpoint %d deleted because the program has left the block \n\ |
| in which its expression is valid.\n"), |
| b->number); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| } |
| |
| /* Restore the selected frame. */ |
| select_frame (frame_find_by_id (saved_frame_id)); |
| } |
| |
| |
| /* Returns 1 iff breakpoint location should be |
| inserted in the inferior. */ |
| static int |
| should_be_inserted (struct bp_location *bpt) |
| { |
| if (!breakpoint_enabled (bpt->owner)) |
| return 0; |
| |
| if (bpt->owner->disposition == disp_del_at_next_stop) |
| return 0; |
| |
| if (!bpt->enabled || bpt->shlib_disabled || bpt->duplicate) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* Insert a low-level "breakpoint" of some type. BPT is the breakpoint. |
| Any error messages are printed to TMP_ERROR_STREAM; and DISABLED_BREAKS, |
| and HW_BREAKPOINT_ERROR are used to report problems. |
| |
| NOTE drow/2003-09-09: This routine could be broken down to an object-style |
| method for each breakpoint or catchpoint type. */ |
| static int |
| insert_bp_location (struct bp_location *bpt, |
| struct ui_file *tmp_error_stream, |
| int *disabled_breaks, |
| int *hw_breakpoint_error) |
| { |
| int val = 0; |
| |
| if (!should_be_inserted (bpt) || bpt->inserted) |
| return 0; |
| |
| /* Initialize the target-specific information. */ |
| memset (&bpt->target_info, 0, sizeof (bpt->target_info)); |
| bpt->target_info.placed_address = bpt->address; |
| |
| if (bpt->loc_type == bp_loc_software_breakpoint |
| || bpt->loc_type == bp_loc_hardware_breakpoint) |
| { |
| if (bpt->owner->type != bp_hardware_breakpoint) |
| { |
| /* If the explicitly specified breakpoint type |
| is not hardware breakpoint, check the memory map to see |
| if the breakpoint address is in read only memory or not. |
| Two important cases are: |
| - location type is not hardware breakpoint, memory |
| is readonly. We change the type of the location to |
| hardware breakpoint. |
| - location type is hardware breakpoint, memory is read-write. |
| This means we've previously made the location hardware one, but |
| then the memory map changed, so we undo. |
| |
| When breakpoints are removed, remove_breakpoints will |
| use location types we've just set here, the only possible |
| problem is that memory map has changed during running program, |
| but it's not going to work anyway with current gdb. */ |
| struct mem_region *mr |
| = lookup_mem_region (bpt->target_info.placed_address); |
| |
| if (mr) |
| { |
| if (automatic_hardware_breakpoints) |
| { |
| int changed = 0; |
| enum bp_loc_type new_type; |
| |
| if (mr->attrib.mode != MEM_RW) |
| new_type = bp_loc_hardware_breakpoint; |
| else |
| new_type = bp_loc_software_breakpoint; |
| |
| if (new_type != bpt->loc_type) |
| { |
| static int said = 0; |
| bpt->loc_type = new_type; |
| if (!said) |
| { |
| fprintf_filtered (gdb_stdout, _("\ |
| Note: automatically using hardware breakpoints for read-only addresses.\n")); |
| said = 1; |
| } |
| } |
| } |
| else if (bpt->loc_type == bp_loc_software_breakpoint |
| && mr->attrib.mode != MEM_RW) |
| warning (_("cannot set software breakpoint at readonly address %s"), |
| paddr (bpt->address)); |
| } |
| } |
| |
| /* First check to see if we have to handle an overlay. */ |
| if (overlay_debugging == ovly_off |
| || bpt->section == NULL |
| || !(section_is_overlay (bpt->section))) |
| { |
| /* No overlay handling: just set the breakpoint. */ |
| |
| if (bpt->loc_type == bp_loc_hardware_breakpoint) |
| val = target_insert_hw_breakpoint (&bpt->target_info); |
| else |
| val = target_insert_breakpoint (&bpt->target_info); |
| } |
| else |
| { |
| /* This breakpoint is in an overlay section. |
| Shall we set a breakpoint at the LMA? */ |
| if (!overlay_events_enabled) |
| { |
| /* Yes -- overlay event support is not active, |
| so we must try to set a breakpoint at the LMA. |
| This will not work for a hardware breakpoint. */ |
| if (bpt->loc_type == bp_loc_hardware_breakpoint) |
| warning (_("hardware breakpoint %d not supported in overlay!"), |
| bpt->owner->number); |
| else |
| { |
| CORE_ADDR addr = overlay_unmapped_address (bpt->address, |
| bpt->section); |
| /* Set a software (trap) breakpoint at the LMA. */ |
| bpt->overlay_target_info = bpt->target_info; |
| bpt->overlay_target_info.placed_address = addr; |
| val = target_insert_breakpoint (&bpt->overlay_target_info); |
| if (val != 0) |
| fprintf_unfiltered (tmp_error_stream, |
| "Overlay breakpoint %d failed: in ROM?", |
| bpt->owner->number); |
| } |
| } |
| /* Shall we set a breakpoint at the VMA? */ |
| if (section_is_mapped (bpt->section)) |
| { |
| /* Yes. This overlay section is mapped into memory. */ |
| if (bpt->loc_type == bp_loc_hardware_breakpoint) |
| val = target_insert_hw_breakpoint (&bpt->target_info); |
| else |
| val = target_insert_breakpoint (&bpt->target_info); |
| } |
| else |
| { |
| /* No. This breakpoint will not be inserted. |
| No error, but do not mark the bp as 'inserted'. */ |
| return 0; |
| } |
| } |
| |
| if (val) |
| { |
| /* Can't set the breakpoint. */ |
| if (solib_address (bpt->address)) |
| { |
| /* See also: disable_breakpoints_in_shlibs. */ |
| val = 0; |
| bpt->shlib_disabled = 1; |
| if (!*disabled_breaks) |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert breakpoint %d.\n", |
| bpt->owner->number); |
| fprintf_unfiltered (tmp_error_stream, |
| "Temporarily disabling shared library breakpoints:\n"); |
| } |
| *disabled_breaks = 1; |
| fprintf_unfiltered (tmp_error_stream, |
| "breakpoint #%d\n", bpt->owner->number); |
| } |
| else |
| { |
| if (bpt->loc_type == bp_loc_hardware_breakpoint) |
| { |
| *hw_breakpoint_error = 1; |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert hardware breakpoint %d.\n", |
| bpt->owner->number); |
| } |
| else |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Cannot insert breakpoint %d.\n", |
| bpt->owner->number); |
| fprintf_filtered (tmp_error_stream, |
| "Error accessing memory address "); |
| fputs_filtered (paddress (bpt->address), tmp_error_stream); |
| fprintf_filtered (tmp_error_stream, ": %s.\n", |
| safe_strerror (val)); |
| } |
| |
| } |
| } |
| else |
| bpt->inserted = 1; |
| |
| return val; |
| } |
| |
| else if (bpt->loc_type == bp_loc_hardware_watchpoint |
| /* NOTE drow/2003-09-08: This state only exists for removing |
| watchpoints. It's not clear that it's necessary... */ |
| && bpt->owner->disposition != disp_del_at_next_stop) |
| { |
| val = target_insert_watchpoint (bpt->address, |
| bpt->length, |
| bpt->watchpoint_type); |
| bpt->inserted = (val != -1); |
| } |
| |
| else if (bpt->owner->type == bp_catchpoint) |
| { |
| struct gdb_exception e = catch_exception (uiout, insert_catchpoint, |
| bpt->owner, RETURN_MASK_ERROR); |
| exception_fprintf (gdb_stderr, e, "warning: inserting catchpoint %d: ", |
| bpt->owner->number); |
| if (e.reason < 0) |
| bpt->owner->enable_state = bp_disabled; |
| else |
| bpt->inserted = 1; |
| |
| /* We've already printed an error message if there was a problem |
| inserting this catchpoint, and we've disabled the catchpoint, |
| so just return success. */ |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| /* Make sure all breakpoints are inserted in inferior. |
| Throws exception on any error. |
| A breakpoint that is already inserted won't be inserted |
| again, so calling this function twice is safe. */ |
| void |
| insert_breakpoints (void) |
| { |
| struct breakpoint *bpt; |
| |
| ALL_BREAKPOINTS (bpt) |
| if (is_hardware_watchpoint (bpt)) |
| update_watchpoint (bpt, 0 /* don't reparse. */); |
| |
| update_global_location_list (1); |
| |
| if (!breakpoints_always_inserted_mode () |
| && (target_has_execution |
| || (gdbarch_has_global_solist (target_gdbarch) |
| && target_supports_multi_process ()))) |
| /* update_global_location_list does not insert breakpoints |
| when always_inserted_mode is not enabled. Explicitly |
| insert them now. */ |
| insert_breakpoint_locations (); |
| } |
| |
| /* insert_breakpoints is used when starting or continuing the program. |
| remove_breakpoints is used when the program stops. |
| Both return zero if successful, |
| or an `errno' value if could not write the inferior. */ |
| |
| static void |
| insert_breakpoint_locations (void) |
| { |
| struct breakpoint *bpt; |
| struct bp_location *b, *temp; |
| int error = 0; |
| int val = 0; |
| int disabled_breaks = 0; |
| int hw_breakpoint_error = 0; |
| |
| struct ui_file *tmp_error_stream = mem_fileopen (); |
| struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_error_stream); |
| |
| /* Explicitly mark the warning -- this will only be printed if |
| there was an error. */ |
| fprintf_unfiltered (tmp_error_stream, "Warning:\n"); |
| |
| ALL_BP_LOCATIONS_SAFE (b, temp) |
| { |
| if (!should_be_inserted (b) || b->inserted) |
| continue; |
| |
| /* There is no point inserting thread-specific breakpoints if the |
| thread no longer exists. */ |
| if (b->owner->thread != -1 |
| && !valid_thread_id (b->owner->thread)) |
| continue; |
| |
| val = insert_bp_location (b, tmp_error_stream, |
| &disabled_breaks, |
| &hw_breakpoint_error); |
| if (val) |
| error = val; |
| } |
| |
| /* If we failed to insert all locations of a watchpoint, |
| remove them, as half-inserted watchpoint is of limited use. */ |
| ALL_BREAKPOINTS (bpt) |
| { |
| int some_failed = 0; |
| struct bp_location *loc; |
| |
| if (!is_hardware_watchpoint (bpt)) |
| continue; |
| |
| if (!breakpoint_enabled (bpt)) |
| continue; |
| |
| if (bpt->disposition == disp_del_at_next_stop) |
| continue; |
| |
| for (loc = bpt->loc; loc; loc = loc->next) |
| if (!loc->inserted) |
| { |
| some_failed = 1; |
| break; |
| } |
| if (some_failed) |
| { |
| for (loc = bpt->loc; loc; loc = loc->next) |
| if (loc->inserted) |
| remove_breakpoint (loc, mark_uninserted); |
| |
| hw_breakpoint_error = 1; |
| fprintf_unfiltered (tmp_error_stream, |
| "Could not insert hardware watchpoint %d.\n", |
| bpt->number); |
| error = -1; |
| } |
| } |
| |
| if (error) |
| { |
| /* If a hardware breakpoint or watchpoint was inserted, add a |
| message about possibly exhausted resources. */ |
| if (hw_breakpoint_error) |
| { |
| fprintf_unfiltered (tmp_error_stream, |
| "Could not insert hardware breakpoints:\n\ |
| You may have requested too many hardware breakpoints/watchpoints.\n"); |
| } |
| target_terminal_ours_for_output (); |
| error_stream (tmp_error_stream); |
| } |
| |
| do_cleanups (cleanups); |
| } |
| |
| int |
| remove_breakpoints (void) |
| { |
| struct bp_location *b; |
| int val; |
| |
| ALL_BP_LOCATIONS (b) |
| { |
| if (b->inserted) |
| { |
| val = remove_breakpoint (b, mark_uninserted); |
| if (val != 0) |
| return val; |
| } |
| } |
| return 0; |
| } |
| |
| int |
| remove_hw_watchpoints (void) |
| { |
| struct bp_location *b; |
| int val; |
| |
| ALL_BP_LOCATIONS (b) |
| { |
| if (b->inserted && b->loc_type == bp_loc_hardware_watchpoint) |
| { |
| val = remove_breakpoint (b, mark_uninserted); |
| if (val != 0) |
| return val; |
| } |
| } |
| return 0; |
| } |
| |
| int |
| reattach_breakpoints (int pid) |
| { |
| struct bp_location *b; |
| int val; |
| struct cleanup *old_chain = save_inferior_ptid (); |
| struct ui_file *tmp_error_stream = mem_fileopen (); |
| int dummy1 = 0, dummy2 = 0; |
| |
| make_cleanup_ui_file_delete (tmp_error_stream); |
| |
| inferior_ptid = pid_to_ptid (pid); |
| ALL_BP_LOCATIONS (b) |
| { |
| if (b->inserted) |
| { |
| b->inserted = 0; |
| val = insert_bp_location (b, tmp_error_stream, |
| &dummy1, &dummy2); |
| if (val != 0) |
| { |
| do_cleanups (old_chain); |
| return val; |
| } |
| } |
| } |
| do_cleanups (old_chain); |
| return 0; |
| } |
| |
| void |
| update_breakpoints_after_exec (void) |
| { |
| struct breakpoint *b; |
| struct breakpoint *temp; |
| struct bp_location *bploc; |
| |
| /* We're about to delete breakpoints from GDB's lists. If the |
| INSERTED flag is true, GDB will try to lift the breakpoints by |
| writing the breakpoints' "shadow contents" back into memory. The |
| "shadow contents" are NOT valid after an exec, so GDB should not |
| do that. Instead, the target is responsible from marking |
| breakpoints out as soon as it detects an exec. We don't do that |
| here instead, because there may be other attempts to delete |
| breakpoints after detecting an exec and before reaching here. */ |
| ALL_BP_LOCATIONS (bploc) |
| gdb_assert (!bploc->inserted); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| /* Solib breakpoints must be explicitly reset after an exec(). */ |
| if (b->type == bp_shlib_event) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Thread event breakpoints must be set anew after an exec(), |
| as must overlay event breakpoints. */ |
| if (b->type == bp_thread_event || b->type == bp_overlay_event) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Step-resume breakpoints are meaningless after an exec(). */ |
| if (b->type == bp_step_resume) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| /* Longjmp and longjmp-resume breakpoints are also meaningless |
| after an exec. */ |
| if (b->type == bp_longjmp || b->type == bp_longjmp_resume) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| |
| if (b->type == bp_catchpoint) |
| { |
| /* For now, none of the bp_catchpoint breakpoints need to |
| do anything at this point. In the future, if some of |
| the catchpoints need to something, we will need to add |
| a new method, and call this method from here. */ |
| continue; |
| } |
| |
| /* bp_finish is a special case. The only way we ought to be able |
| to see one of these when an exec() has happened, is if the user |
| caught a vfork, and then said "finish". Ordinarily a finish just |
| carries them to the call-site of the current callee, by setting |
| a temporary bp there and resuming. But in this case, the finish |
| will carry them entirely through the vfork & exec. |
| |
| We don't want to allow a bp_finish to remain inserted now. But |
| we can't safely delete it, 'cause finish_command has a handle to |
| the bp on a bpstat, and will later want to delete it. There's a |
| chance (and I've seen it happen) that if we delete the bp_finish |
| here, that its storage will get reused by the time finish_command |
| gets 'round to deleting the "use to be a bp_finish" breakpoint. |
| We really must allow finish_command to delete a bp_finish. |
| |
| In the absense of a general solution for the "how do we know |
| it's safe to delete something others may have handles to?" |
| problem, what we'll do here is just uninsert the bp_finish, and |
| let finish_command delete it. |
| |
| (We know the bp_finish is "doomed" in the sense that it's |
| momentary, and will be deleted as soon as finish_command sees |
| the inferior stopped. So it doesn't matter that the bp's |
| address is probably bogus in the new a.out, unlike e.g., the |
| solib breakpoints.) */ |
| |
| if (b->type == bp_finish) |
| { |
| continue; |
| } |
| |
| /* Without a symbolic address, we have little hope of the |
| pre-exec() address meaning the same thing in the post-exec() |
| a.out. */ |
| if (b->addr_string == NULL) |
| { |
| delete_breakpoint (b); |
| continue; |
| } |
| } |
| /* FIXME what about longjmp breakpoints? Re-create them here? */ |
| create_overlay_event_breakpoint ("_ovly_debug_event"); |
| } |
| |
| int |
| detach_breakpoints (int pid) |
| { |
| struct bp_location *b; |
| int val; |
| struct cleanup *old_chain = save_inferior_ptid (); |
| |
| if (pid == PIDGET (inferior_ptid)) |
| error (_("Cannot detach breakpoints of inferior_ptid")); |
| |
| /* Set inferior_ptid; remove_breakpoint uses this global. */ |
| inferior_ptid = pid_to_ptid (pid); |
| ALL_BP_LOCATIONS (b) |
| { |
| if (b->inserted) |
| { |
| val = remove_breakpoint (b, mark_inserted); |
| if (val != 0) |
| { |
| do_cleanups (old_chain); |
| return val; |
| } |
| } |
| } |
| do_cleanups (old_chain); |
| return 0; |
| } |
| |
| static int |
| remove_breakpoint (struct bp_location *b, insertion_state_t is) |
| { |
| int val; |
| |
| if (b->owner->enable_state == bp_permanent) |
| /* Permanent breakpoints cannot be inserted or removed. */ |
| return 0; |
| |
| /* The type of none suggests that owner is actually deleted. |
| This should not ever happen. */ |
| gdb_assert (b->owner->type != bp_none); |
| |
| if (b->loc_type == bp_loc_software_breakpoint |
| || b->loc_type == bp_loc_hardware_breakpoint) |
| { |
| /* "Normal" instruction breakpoint: either the standard |
| trap-instruction bp (bp_breakpoint), or a |
| bp_hardware_breakpoint. */ |
| |
| /* First check to see if we have to handle an overlay. */ |
| if (overlay_debugging == ovly_off |
| || b->section == NULL |
| || !(section_is_overlay (b->section))) |
| { |
| /* No overlay handling: just remove the breakpoint. */ |
| |
| if (b->loc_type == bp_loc_hardware_breakpoint) |
| val = target_remove_hw_breakpoint (&b->target_info); |
| else |
| val = target_remove_breakpoint (&b->target_info); |
| } |
| else |
| { |
| /* This breakpoint is in an overlay section. |
| Did we set a breakpoint at the LMA? */ |
| if (!overlay_events_enabled) |
| { |
| /* Yes -- overlay event support is not active, so we |
| should have set a breakpoint at the LMA. Remove it. |
| */ |
| /* Ignore any failures: if the LMA is in ROM, we will |
| have already warned when we failed to insert it. */ |
| if (b->loc_type == bp_loc_hardware_breakpoint) |
| target_remove_hw_breakpoint (&b->overlay_target_info); |
| else |
| target_remove_breakpoint (&b->overlay_target_info); |
| } |
| /* Did we set a breakpoint at the VMA? |
| If so, we will have marked the breakpoint 'inserted'. */ |
| if (b->inserted) |
| { |
| /* Yes -- remove it. Previously we did not bother to |
| remove the breakpoint if the section had been |
| unmapped, but let's not rely on that being safe. We |
| don't know what the overlay manager might do. */ |
| if (b->loc_type == bp_loc_hardware_breakpoint) |
| val = target_remove_hw_breakpoint (&b->target_info); |
| |
| /* However, we should remove *software* breakpoints only |
| if the section is still mapped, or else we overwrite |
| wrong code with the saved shadow contents. */ |
| else if (section_is_mapped (b->section)) |
| val = target_remove_breakpoint (&b->target_info); |
| else |
| val = 0; |
| } |
| else |
| { |
| /* No -- not inserted, so no need to remove. No error. */ |
| val = 0; |
| } |
| } |
| |
| /* In some cases, we might not be able to remove a breakpoint |
| in a shared library that has already been removed, but we |
| have not yet processed the shlib unload event. */ |
| if (val && solib_address (b->address)) |
| val = 0; |
| |
| if (val) |
| return val; |
| b->inserted = (is == mark_inserted); |
| } |
| else if (b->loc_type == bp_loc_hardware_watchpoint) |
| { |
| struct value *v; |
| struct value *n; |
| |
| b->inserted = (is == mark_inserted); |
| val = target_remove_watchpoint (b->address, b->length, |
| b->watchpoint_type); |
| |
| /* Failure to remove any of the hardware watchpoints comes here. */ |
| if ((is == mark_uninserted) && (b->inserted)) |
| warning (_("Could not remove hardware watchpoint %d."), |
| b->owner->number); |
| } |
| else if (b->owner->type == bp_catchpoint |
| && breakpoint_enabled (b->owner) |
| && !b->duplicate) |
| { |
| gdb_assert (b->owner->ops != NULL && b->owner->ops->remove != NULL); |
| |
| val = b->owner->ops->remove (b->owner); |
| if (val) |
| return val; |
| b->inserted = (is == mark_inserted); |
| } |
| |
| return 0; |
| } |
| |
| /* Clear the "inserted" flag in all breakpoints. */ |
| |
| void |
| mark_breakpoints_out (void) |
| { |
| struct bp_location *bpt; |
| |
| ALL_BP_LOCATIONS (bpt) |
| bpt->inserted = 0; |
| } |
| |
| /* Clear the "inserted" flag in all breakpoints and delete any |
| breakpoints which should go away between runs of the program. |
| |
| Plus other such housekeeping that has to be done for breakpoints |
| between runs. |
| |
| Note: this function gets called at the end of a run (by |
| generic_mourn_inferior) and when a run begins (by |
| init_wait_for_inferior). */ |
| |
| |
| |
| void |
| breakpoint_init_inferior (enum inf_context context) |
| { |
| struct breakpoint *b, *temp; |
| struct bp_location *bpt; |
| int ix; |
| |
| /* If breakpoint locations are shared across processes, then there's |
| nothing to do. */ |
| if (gdbarch_has_global_solist (target_gdbarch)) |
| return; |
| |
| ALL_BP_LOCATIONS (bpt) |
| if (bpt->owner->enable_state != bp_permanent) |
| bpt->inserted = 0; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| switch (b->type) |
| { |
| case bp_call_dummy: |
| case bp_watchpoint_scope: |
| |
| /* If the call dummy breakpoint is at the entry point it will |
| cause problems when the inferior is rerun, so we better |
| get rid of it. |
| |
| Also get rid of scope breakpoints. */ |
| delete_breakpoint (b); |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| |
| /* Likewise for watchpoints on local expressions. */ |
| if (b->exp_valid_block != NULL) |
| delete_breakpoint (b); |
| else if (context == inf_starting) |
| { |
| /* Reset val field to force reread of starting value |
| in insert_breakpoints. */ |
| if (b->val) |
| value_free (b->val); |
| b->val = NULL; |
| b->val_valid = 0; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* Get rid of the moribund locations. */ |
| for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, bpt); ++ix) |
| free_bp_location (bpt); |
| VEC_free (bp_location_p, moribund_locations); |
| } |
| |
| /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint |
| exists at PC. It returns ordinary_breakpoint_here if it's an |
| ordinary breakpoint, or permanent_breakpoint_here if it's a |
| permanent breakpoint. |
| - When continuing from a location with an ordinary breakpoint, we |
| actually single step once before calling insert_breakpoints. |
| - When continuing from a localion with a permanent breakpoint, we |
| need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by |
| the target, to advance the PC past the breakpoint. */ |
| |
| enum breakpoint_here |
| breakpoint_here_p (CORE_ADDR pc) |
| { |
| const struct bp_location *bpt; |
| int any_breakpoint_here = 0; |
| |
| ALL_BP_LOCATIONS (bpt) |
| { |
| if (bpt->loc_type != bp_loc_software_breakpoint |
| && bpt->loc_type != bp_loc_hardware_breakpoint) |
| continue; |
| |
| if ((breakpoint_enabled (bpt->owner) |
| || bpt->owner->enable_state == bp_permanent) |
| && bpt->address == pc) /* bp is enabled and matches pc */ |
| { |
| if (overlay_debugging |
| && section_is_overlay (bpt->section) |
| && !section_is_mapped (bpt->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else if (bpt->owner->enable_state == bp_permanent) |
| return permanent_breakpoint_here; |
| else |
| any_breakpoint_here = 1; |
| } |
| } |
| |
| return any_breakpoint_here ? ordinary_breakpoint_here : 0; |
| } |
| |
| /* Return true if there's a moribund breakpoint at PC. */ |
| |
| int |
| moribund_breakpoint_here_p (CORE_ADDR pc) |
| { |
| struct bp_location *loc; |
| int ix; |
| |
| for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix) |
| if (loc->address == pc) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* Returns non-zero if there's a breakpoint inserted at PC, which is |
| inserted using regular breakpoint_chain/bp_location_chain mechanism. |
| This does not check for single-step breakpoints, which are |
| inserted and removed using direct target manipulation. */ |
| |
| int |
| regular_breakpoint_inserted_here_p (CORE_ADDR pc) |
| { |
| const struct bp_location *bpt; |
| |
| ALL_BP_LOCATIONS (bpt) |
| { |
| if (bpt->loc_type != bp_loc_software_breakpoint |
| && bpt->loc_type != bp_loc_hardware_breakpoint) |
| continue; |
| |
| if (bpt->inserted |
| && bpt->address == pc) /* bp is inserted and matches pc */ |
| { |
| if (overlay_debugging |
| && section_is_overlay (bpt->section) |
| && !section_is_mapped (bpt->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* Returns non-zero iff there's either regular breakpoint |
| or a single step breakpoint inserted at PC. */ |
| |
| int |
| breakpoint_inserted_here_p (CORE_ADDR pc) |
| { |
| if (regular_breakpoint_inserted_here_p (pc)) |
| return 1; |
| |
| if (single_step_breakpoint_inserted_here_p (pc)) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* This function returns non-zero iff there is a software breakpoint |
| inserted at PC. */ |
| |
| int |
| software_breakpoint_inserted_here_p (CORE_ADDR pc) |
| { |
| const struct bp_location *bpt; |
| int any_breakpoint_here = 0; |
| |
| ALL_BP_LOCATIONS (bpt) |
| { |
| if (bpt->loc_type != bp_loc_software_breakpoint) |
| continue; |
| |
| if (bpt->inserted |
| && bpt->address == pc) /* bp is enabled and matches pc */ |
| { |
| if (overlay_debugging |
| && section_is_overlay (bpt->section) |
| && !section_is_mapped (bpt->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else |
| return 1; |
| } |
| } |
| |
| /* Also check for software single-step breakpoints. */ |
| if (single_step_breakpoint_inserted_here_p (pc)) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at |
| PC is valid for process/thread PTID. */ |
| |
| int |
| breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid) |
| { |
| const struct bp_location *bpt; |
| int thread; |
| |
| thread = pid_to_thread_id (ptid); |
| |
| ALL_BP_LOCATIONS (bpt) |
| { |
| if (bpt->loc_type != bp_loc_software_breakpoint |
| && bpt->loc_type != bp_loc_hardware_breakpoint) |
| continue; |
| |
| if ((breakpoint_enabled (bpt->owner) |
| || bpt->owner->enable_state == bp_permanent) |
| && bpt->address == pc |
| && (bpt->owner->thread == -1 || bpt->owner->thread == thread)) |
| { |
| if (overlay_debugging |
| && section_is_overlay (bpt->section) |
| && !section_is_mapped (bpt->section)) |
| continue; /* unmapped overlay -- can't be a match */ |
| else |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| |
| /* bpstat stuff. External routines' interfaces are documented |
| in breakpoint.h. */ |
| |
| int |
| ep_is_catchpoint (struct breakpoint *ep) |
| { |
| return (ep->type == bp_catchpoint); |
| } |
| |
| void |
| bpstat_free (bpstat bs) |
| { |
| if (bs->old_val != NULL) |
| value_free (bs->old_val); |
| free_command_lines (&bs->commands); |
| xfree (bs); |
| } |
| |
| /* Clear a bpstat so that it says we are not at any breakpoint. |
| Also free any storage that is part of a bpstat. */ |
| |
| void |
| bpstat_clear (bpstat *bsp) |
| { |
| bpstat p; |
| bpstat q; |
| |
| if (bsp == 0) |
| return; |
| p = *bsp; |
| while (p != NULL) |
| { |
| q = p->next; |
| bpstat_free (p); |
| p = q; |
| } |
| *bsp = NULL; |
| } |
| |
| /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
| is part of the bpstat is copied as well. */ |
| |
| bpstat |
| bpstat_copy (bpstat bs) |
| { |
| bpstat p = NULL; |
| bpstat tmp; |
| bpstat retval = NULL; |
| |
| if (bs == NULL) |
| return bs; |
| |
| for (; bs != NULL; bs = bs->next) |
| { |
| tmp = (bpstat) xmalloc (sizeof (*tmp)); |
| memcpy (tmp, bs, sizeof (*tmp)); |
| if (bs->commands != NULL) |
| tmp->commands = copy_command_lines (bs->commands); |
| if (bs->old_val != NULL) |
| { |
| tmp->old_val = value_copy (bs->old_val); |
| release_value (tmp->old_val); |
| } |
| |
| if (p == NULL) |
| /* This is the first thing in the chain. */ |
| retval = tmp; |
| else |
| p->next = tmp; |
| p = tmp; |
| } |
| p->next = NULL; |
| return retval; |
| } |
| |
| /* Find the bpstat associated with this breakpoint */ |
| |
| bpstat |
| bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint) |
| { |
| if (bsp == NULL) |
| return NULL; |
| |
| for (; bsp != NULL; bsp = bsp->next) |
| { |
| if (bsp->breakpoint_at && bsp->breakpoint_at->owner == breakpoint) |
| return bsp; |
| } |
| return NULL; |
| } |
| |
| /* Find a step_resume breakpoint associated with this bpstat. |
| (If there are multiple step_resume bp's on the list, this function |
| will arbitrarily pick one.) |
| |
| It is an error to use this function if BPSTAT doesn't contain a |
| step_resume breakpoint. |
| |
| See wait_for_inferior's use of this function. */ |
| struct breakpoint * |
| bpstat_find_step_resume_breakpoint (bpstat bsp) |
| { |
| int current_thread; |
| |
| gdb_assert (bsp != NULL); |
| |
| current_thread = pid_to_thread_id (inferior_ptid); |
| |
| for (; bsp != NULL; bsp = bsp->next) |
| { |
| if ((bsp->breakpoint_at != NULL) && |
| (bsp->breakpoint_at->owner->type == bp_step_resume) && |
| (bsp->breakpoint_at->owner->thread == current_thread || |
| bsp->breakpoint_at->owner->thread == -1)) |
| return bsp->breakpoint_at->owner; |
| } |
| |
| internal_error (__FILE__, __LINE__, _("No step_resume breakpoint found.")); |
| } |
| |
| |
| /* Put in *NUM the breakpoint number of the first breakpoint we are stopped |
| at. *BSP upon return is a bpstat which points to the remaining |
| breakpoints stopped at (but which is not guaranteed to be good for |
| anything but further calls to bpstat_num). |
| Return 0 if passed a bpstat which does not indicate any breakpoints. |
| Return -1 if stopped at a breakpoint that has been deleted since |
| we set it. |
| Return 1 otherwise. */ |
| |
| int |
| bpstat_num (bpstat *bsp, int *num) |
| { |
| struct breakpoint *b; |
| |
| if ((*bsp) == NULL) |
| return 0; /* No more breakpoint values */ |
| |
| /* We assume we'll never have several bpstats that |
| correspond to a single breakpoint -- otherwise, |
| this function might return the same number more |
| than once and this will look ugly. */ |
| b = (*bsp)->breakpoint_at ? (*bsp)->breakpoint_at->owner : NULL; |
| *bsp = (*bsp)->next; |
| if (b == NULL) |
| return -1; /* breakpoint that's been deleted since */ |
| |
| *num = b->number; /* We have its number */ |
| return 1; |
| } |
| |
| /* Modify BS so that the actions will not be performed. */ |
| |
| void |
| bpstat_clear_actions (bpstat bs) |
| { |
| for (; bs != NULL; bs = bs->next) |
| { |
| free_command_lines (&bs->commands); |
| if (bs->old_val != NULL) |
| { |
| value_free (bs->old_val); |
| bs->old_val = NULL; |
| } |
| } |
| } |
| |
| /* Stub for cleaning up our state if we error-out of a breakpoint command */ |
| static void |
| cleanup_executing_breakpoints (void *ignore) |
| { |
| executing_breakpoint_commands = 0; |
| } |
| |
| /* Execute all the commands associated with all the breakpoints at this |
| location. Any of these commands could cause the process to proceed |
| beyond this point, etc. We look out for such changes by checking |
| the global "breakpoint_proceeded" after each command. |
| |
| Returns true if a breakpoint command resumed the inferior. In that |
| case, it is the caller's responsibility to recall it again with the |
| bpstat of the current thread. */ |
| |
| static int |
| bpstat_do_actions_1 (bpstat *bsp) |
| { |
| bpstat bs; |
| struct cleanup *old_chain; |
| int again = 0; |
| |
| /* Avoid endless recursion if a `source' command is contained |
| in bs->commands. */ |
| if (executing_breakpoint_commands) |
| return 0; |
| |
| executing_breakpoint_commands = 1; |
| old_chain = make_cleanup (cleanup_executing_breakpoints, 0); |
| |
| /* This pointer will iterate over the list of bpstat's. */ |
| bs = *bsp; |
| |
| breakpoint_proceeded = 0; |
| for (; bs != NULL; bs = bs->next) |
| { |
| struct command_line *cmd; |
| struct cleanup *this_cmd_tree_chain; |
| |
| /* Take ownership of the BSP's command tree, if it has one. |
| |
| The command tree could legitimately contain commands like |
| 'step' and 'next', which call clear_proceed_status, which |
| frees stop_bpstat's command tree. To make sure this doesn't |
| free the tree we're executing out from under us, we need to |
| take ownership of the tree ourselves. Since a given bpstat's |
| commands are only executed once, we don't need to copy it; we |
| can clear the pointer in the bpstat, and make sure we free |
| the tree when we're done. */ |
| cmd = bs->commands; |
| bs->commands = 0; |
| this_cmd_tree_chain = make_cleanup_free_command_lines (&cmd); |
| |
| while (cmd != NULL) |
| { |
| execute_control_command (cmd); |
| |
| if (breakpoint_proceeded) |
| break; |
| else |
| cmd = cmd->next; |
| } |
| |
| /* We can free this command tree now. */ |
| do_cleanups (this_cmd_tree_chain); |
| |
| if (breakpoint_proceeded) |
| { |
| if (target_can_async_p ()) |
| /* If we are in async mode, then the target might be still |
| running, not stopped at any breakpoint, so nothing for |
| us to do here -- just return to the event loop. */ |
| ; |
| else |
| /* In sync mode, when execute_control_command returns |
| we're already standing on the next breakpoint. |
| Breakpoint commands for that stop were not run, since |
| execute_command does not run breakpoint commands -- |
| only command_line_handler does, but that one is not |
| involved in execution of breakpoint commands. So, we |
| can now execute breakpoint commands. It should be |
| noted that making execute_command do bpstat actions is |
| not an option -- in this case we'll have recursive |
| invocation of bpstat for each breakpoint with a |
| command, and can easily blow up GDB stack. Instead, we |
| return true, which will trigger the caller to recall us |
| with the new stop_bpstat. */ |
| again = 1; |
| break; |
| } |
| } |
| do_cleanups (old_chain); |
| return again; |
| } |
| |
| void |
| bpstat_do_actions (void) |
| { |
| /* Do any commands attached to breakpoint we are stopped at. */ |
| while (!ptid_equal (inferior_ptid, null_ptid) |
| && target_has_execution |
| && !is_exited (inferior_ptid) |
| && !is_executing (inferior_ptid)) |
| /* Since in sync mode, bpstat_do_actions may resume the inferior, |
| and only return when it is stopped at the next breakpoint, we |
| keep doing breakpoint actions until it returns false to |
| indicate the inferior was not resumed. */ |
| if (!bpstat_do_actions_1 (&inferior_thread ()->stop_bpstat)) |
| break; |
| } |
| |
| /* Print out the (old or new) value associated with a watchpoint. */ |
| |
| static void |
| watchpoint_value_print (struct value *val, struct ui_file *stream) |
| { |
| if (val == NULL) |
| fprintf_unfiltered (stream, _("<unreadable>")); |
| else |
| { |
| struct value_print_options opts; |
| get_user_print_options (&opts); |
| value_print (val, stream, &opts); |
| } |
| } |
| |
| /* This is the normal print function for a bpstat. In the future, |
| much of this logic could (should?) be moved to bpstat_stop_status, |
| by having it set different print_it values. |
| |
| Current scheme: When we stop, bpstat_print() is called. It loops |
| through the bpstat list of things causing this stop, calling the |
| print_bp_stop_message function on each one. The behavior of the |
| print_bp_stop_message function depends on the print_it field of |
| bpstat. If such field so indicates, call this function here. |
| |
| Return values from this routine (ultimately used by bpstat_print() |
| and normal_stop() to decide what to do): |
| PRINT_NOTHING: Means we already printed all we needed to print, |
| don't print anything else. |
| PRINT_SRC_ONLY: Means we printed something, and we do *not* desire |
| that something to be followed by a location. |
| PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire |
| that something to be followed by a location. |
| PRINT_UNKNOWN: Means we printed nothing or we need to do some more |
| analysis. */ |
| |
| static enum print_stop_action |
| print_it_typical (bpstat bs) |
| { |
| struct cleanup *old_chain; |
| struct breakpoint *b; |
| const struct bp_location *bl; |
| struct ui_stream *stb; |
| int bp_temp = 0; |
| enum print_stop_action result; |
| |
| /* bs->breakpoint_at can be NULL if it was a momentary breakpoint |
| which has since been deleted. */ |
| if (bs->breakpoint_at == NULL) |
| return PRINT_UNKNOWN; |
| bl = bs->breakpoint_at; |
| b = bl->owner; |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| switch (b->type) |
| { |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| bp_temp = bs->breakpoint_at->owner->disposition == disp_del; |
| if (bl->address != bl->requested_address) |
| breakpoint_adjustment_warning (bl->requested_address, |
| bl->address, |
| b->number, 1); |
| annotate_breakpoint (b->number); |
| if (bp_temp) |
| ui_out_text (uiout, "\nTemporary breakpoint "); |
| else |
| ui_out_text (uiout, "\nBreakpoint "); |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| ui_out_field_string (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
| ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| } |
| ui_out_field_int (uiout, "bkptno", b->number); |
| ui_out_text (uiout, ", "); |
| result = PRINT_SRC_AND_LOC; |
| break; |
| |
| case bp_shlib_event: |
| /* Did we stop because the user set the stop_on_solib_events |
| variable? (If so, we report this as a generic, "Stopped due |
| to shlib event" message.) */ |
| printf_filtered (_("Stopped due to shared library event\n")); |
| result = PRINT_NOTHING; |
| break; |
| |
| case bp_thread_event: |
| /* Not sure how we will get here. |
| GDB should not stop for these breakpoints. */ |
| printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n")); |
| result = PRINT_NOTHING; |
| break; |
| |
| case bp_overlay_event: |
| /* By analogy with the thread event, GDB should not stop for these. */ |
| printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n")); |
| result = PRINT_NOTHING; |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| annotate_watchpoint (b->number); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER)); |
| mention (b); |
| make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nOld value = "); |
| watchpoint_value_print (bs->old_val, stb->stream); |
| ui_out_field_stream (uiout, "old", stb); |
| ui_out_text (uiout, "\nNew value = "); |
| watchpoint_value_print (b->val, stb->stream); |
| ui_out_field_stream (uiout, "new", stb); |
| ui_out_text (uiout, "\n"); |
| /* More than one watchpoint may have been triggered. */ |
| result = PRINT_UNKNOWN; |
| break; |
| |
| case bp_read_watchpoint: |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER)); |
| mention (b); |
| make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nValue = "); |
| watchpoint_value_print (b->val, stb->stream); |
| ui_out_field_stream (uiout, "value", stb); |
| ui_out_text (uiout, "\n"); |
| result = PRINT_UNKNOWN; |
| break; |
| |
| case bp_access_watchpoint: |
| if (bs->old_val != NULL) |
| { |
| annotate_watchpoint (b->number); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER)); |
| mention (b); |
| make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nOld value = "); |
| watchpoint_value_print (bs->old_val, stb->stream); |
| ui_out_field_stream (uiout, "old", stb); |
| ui_out_text (uiout, "\nNew value = "); |
| } |
| else |
| { |
| mention (b); |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER)); |
| make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| ui_out_text (uiout, "\nValue = "); |
| } |
| watchpoint_value_print (b->val, stb->stream); |
| ui_out_field_stream (uiout, "new", stb); |
| ui_out_text (uiout, "\n"); |
| result = PRINT_UNKNOWN; |
| break; |
| |
| /* Fall through, we don't deal with these types of breakpoints |
| here. */ |
| |
| case bp_finish: |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED)); |
| result = PRINT_UNKNOWN; |
| break; |
| |
| case bp_until: |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED)); |
| result = PRINT_UNKNOWN; |
| break; |
| |
| case bp_none: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| default: |
| result = PRINT_UNKNOWN; |
| break; |
| } |
| |
| do_cleanups (old_chain); |
| return result; |
| } |
| |
| /* Generic routine for printing messages indicating why we |
| stopped. The behavior of this function depends on the value |
| 'print_it' in the bpstat structure. Under some circumstances we |
| may decide not to print anything here and delegate the task to |
| normal_stop(). */ |
| |
| static enum print_stop_action |
| print_bp_stop_message (bpstat bs) |
| { |
| switch (bs->print_it) |
| { |
| case print_it_noop: |
| /* Nothing should be printed for this bpstat entry. */ |
| return PRINT_UNKNOWN; |
| break; |
| |
| case print_it_done: |
| /* We still want to print the frame, but we already printed the |
| relevant messages. */ |
| return PRINT_SRC_AND_LOC; |
| break; |
| |
| case print_it_normal: |
| { |
| const struct bp_location *bl = bs->breakpoint_at; |
| struct breakpoint *b = bl ? bl->owner : NULL; |
| |
| /* Normal case. Call the breakpoint's print_it method, or |
| print_it_typical. */ |
| /* FIXME: how breakpoint can ever be NULL here? */ |
| if (b != NULL && b->ops != NULL && b->ops->print_it != NULL) |
| return b->ops->print_it (b); |
| else |
| return print_it_typical (bs); |
| } |
| break; |
| |
| default: |
| internal_error (__FILE__, __LINE__, |
| _("print_bp_stop_message: unrecognized enum value")); |
| break; |
| } |
| } |
| |
| /* Print a message indicating what happened. This is called from |
| normal_stop(). The input to this routine is the head of the bpstat |
| list - a list of the eventpoints that caused this stop. This |
| routine calls the generic print routine for printing a message |
| about reasons for stopping. This will print (for example) the |
| "Breakpoint n," part of the output. The return value of this |
| routine is one of: |
| |
| PRINT_UNKNOWN: Means we printed nothing |
| PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent |
| code to print the location. An example is |
| "Breakpoint 1, " which should be followed by |
| the location. |
| PRINT_SRC_ONLY: Means we printed something, but there is no need |
| to also print the location part of the message. |
| An example is the catch/throw messages, which |
| don't require a location appended to the end. |
| PRINT_NOTHING: We have done some printing and we don't need any |
| further info to be printed.*/ |
| |
| enum print_stop_action |
| bpstat_print (bpstat bs) |
| { |
| int val; |
| |
| /* Maybe another breakpoint in the chain caused us to stop. |
| (Currently all watchpoints go on the bpstat whether hit or not. |
| That probably could (should) be changed, provided care is taken |
| with respect to bpstat_explains_signal). */ |
| for (; bs; bs = bs->next) |
| { |
| val = print_bp_stop_message (bs); |
| if (val == PRINT_SRC_ONLY |
| || val == PRINT_SRC_AND_LOC |
| || val == PRINT_NOTHING) |
| return val; |
| } |
| |
| /* We reached the end of the chain, or we got a null BS to start |
| with and nothing was printed. */ |
| return PRINT_UNKNOWN; |
| } |
| |
| /* Evaluate the expression EXP and return 1 if value is zero. |
| This is used inside a catch_errors to evaluate the breakpoint condition. |
| The argument is a "struct expression *" that has been cast to char * to |
| make it pass through catch_errors. */ |
| |
| static int |
| breakpoint_cond_eval (void *exp) |
| { |
| struct value *mark = value_mark (); |
| int i = !value_true (evaluate_expression ((struct expression *) exp)); |
| value_free_to_mark (mark); |
| return i; |
| } |
| |
| /* Allocate a new bpstat and chain it to the current one. */ |
| |
| static bpstat |
| bpstat_alloc (const struct bp_location *bl, bpstat cbs /* Current "bs" value */ ) |
| { |
| bpstat bs; |
| |
| bs = (bpstat) xmalloc (sizeof (*bs)); |
| cbs->next = bs; |
| bs->breakpoint_at = bl; |
| /* If the condition is false, etc., don't do the commands. */ |
| bs->commands = NULL; |
| bs->old_val = NULL; |
| bs->print_it = print_it_normal; |
| return bs; |
| } |
| |
| /* The target has stopped with waitstatus WS. Check if any hardware |
| watchpoints have triggered, according to the target. */ |
| |
| int |
| watchpoints_triggered (struct target_waitstatus *ws) |
| { |
| int stopped_by_watchpoint = STOPPED_BY_WATCHPOINT (*ws); |
| CORE_ADDR addr; |
| struct breakpoint *b; |
| |
| if (!stopped_by_watchpoint) |
| { |
| /* We were not stopped by a watchpoint. Mark all watchpoints |
| as not triggered. */ |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint) |
| b->watchpoint_triggered = watch_triggered_no; |
| |
| return 0; |
| } |
| |
| if (!target_stopped_data_address (¤t_target, &addr)) |
| { |
| /* We were stopped by a watchpoint, but we don't know where. |
| Mark all watchpoints as unknown. */ |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint) |
| b->watchpoint_triggered = watch_triggered_unknown; |
| |
| return stopped_by_watchpoint; |
| } |
| |
| /* The target could report the data address. Mark watchpoints |
| affected by this data address as triggered, and all others as not |
| triggered. */ |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint) |
| { |
| struct bp_location *loc; |
| struct value *v; |
| |
| b->watchpoint_triggered = watch_triggered_no; |
| for (loc = b->loc; loc; loc = loc->next) |
| /* Exact match not required. Within range is |
| sufficient. */ |
| if (target_watchpoint_addr_within_range (¤t_target, |
| addr, loc->address, |
| loc->length)) |
| { |
| b->watchpoint_triggered = watch_triggered_yes; |
| break; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /* Possible return values for watchpoint_check (this can't be an enum |
| because of check_errors). */ |
| /* The watchpoint has been deleted. */ |
| #define WP_DELETED 1 |
| /* The value has changed. */ |
| #define WP_VALUE_CHANGED 2 |
| /* The value has not changed. */ |
| #define WP_VALUE_NOT_CHANGED 3 |
| |
| #define BP_TEMPFLAG 1 |
| #define BP_HARDWAREFLAG 2 |
| |
| /* Check watchpoint condition. */ |
| |
| static int |
| watchpoint_check (void *p) |
| { |
| bpstat bs = (bpstat) p; |
| struct breakpoint *b; |
| struct frame_info *fr; |
| int within_current_scope; |
| |
| b = bs->breakpoint_at->owner; |
| |
| if (b->exp_valid_block == NULL) |
| within_current_scope = 1; |
| else |
| { |
| /* There is no current frame at this moment. If we're going to have |
| any chance of handling watchpoints on local variables, we'll need |
| the frame chain (so we can determine if we're in scope). */ |
| reinit_frame_cache (); |
| fr = frame_find_by_id (b->watchpoint_frame); |
| within_current_scope = (fr != NULL); |
| |
| /* If we've gotten confused in the unwinder, we might have |
| returned a frame that can't describe this variable. */ |
| if (within_current_scope |
| && (block_linkage_function (b->exp_valid_block) |
| != get_frame_function (fr))) |
| within_current_scope = 0; |
| |
| /* in_function_epilogue_p() returns a non-zero value if we're still |
| in the function but the stack frame has already been invalidated. |
| Since we can't rely on the values of local variables after the |
| stack has been destroyed, we are treating the watchpoint in that |
| state as `not changed' without further checking. |
| |
| vinschen/2003-09-04: The former implementation left out the case |
| that the watchpoint frame couldn't be found by frame_find_by_id() |
| because the current PC is currently in an epilogue. Calling |
| gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */ |
| if ((!within_current_scope || fr == get_current_frame ()) |
| && gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ())) |
| return WP_VALUE_NOT_CHANGED; |
| if (fr && within_current_scope) |
| /* If we end up stopping, the current frame will get selected |
| in normal_stop. So this call to select_frame won't affect |
| the user. */ |
| select_frame (fr); |
| } |
| |
| if (within_current_scope) |
| { |
| /* We use value_{,free_to_}mark because it could be a |
| *long* time before we return to the command level and |
| call free_all_values. We can't call free_all_values because |
| we might be in the middle of evaluating a function call. */ |
| |
| struct value *mark = value_mark (); |
| struct value *new_val; |
| |
| fetch_watchpoint_value (b->exp, &new_val, NULL, NULL); |
| if ((b->val != NULL) != (new_val != NULL) |
| || (b->val != NULL && !value_equal (b->val, new_val))) |
| { |
| if (new_val != NULL) |
| { |
| release_value (new_val); |
| value_free_to_mark (mark); |
| } |
| bs->old_val = b->val; |
| b->val = new_val; |
| b->val_valid = 1; |
| /* We will stop here */ |
| return WP_VALUE_CHANGED; |
| } |
| else |
| { |
| /* Nothing changed, don't do anything. */ |
| value_free_to_mark (mark); |
| /* We won't stop here */ |
| return WP_VALUE_NOT_CHANGED; |
| } |
| } |
| else |
| { |
| /* This seems like the only logical thing to do because |
| if we temporarily ignored the watchpoint, then when |
| we reenter the block in which it is valid it contains |
| garbage (in the case of a function, it may have two |
| garbage values, one before and one after the prologue). |
| So we can't even detect the first assignment to it and |
| watch after that (since the garbage may or may not equal |
| the first value assigned). */ |
| /* We print all the stop information in print_it_typical(), but |
| in this case, by the time we call print_it_typical() this bp |
| will be deleted already. So we have no choice but print the |
| information here. */ |
| if (ui_out_is_mi_like_p (uiout)) |
| ui_out_field_string |
| (uiout, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE)); |
| ui_out_text (uiout, "\nWatchpoint "); |
| ui_out_field_int (uiout, "wpnum", b->number); |
| ui_out_text (uiout, " deleted because the program has left the block in\n\ |
| which its expression is valid.\n"); |
| |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| |
| return WP_DELETED; |
| } |
| } |
| |
| /* Return true if it looks like target has stopped due to hitting |
| breakpoint location BL. This function does not check if we |
| should stop, only if BL explains the stop. */ |
| static int |
| bpstat_check_location (const struct bp_location *bl, CORE_ADDR bp_addr) |
| { |
| struct breakpoint *b = bl->owner; |
| |
| if (b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint |
| && b->type != bp_hardware_breakpoint |
| && b->type != bp_catchpoint) /* a non-watchpoint bp */ |
| { |
| if (bl->address != bp_addr) /* address doesn't match */ |
| return 0; |
| if (overlay_debugging /* unmapped overlay section */ |
| && section_is_overlay (bl->section) |
| && !section_is_mapped (bl->section)) |
| return 0; |
| } |
| |
| /* Continuable hardware watchpoints are treated as non-existent if the |
| reason we stopped wasn't a hardware watchpoint (we didn't stop on |
| some data address). Otherwise gdb won't stop on a break instruction |
| in the code (not from a breakpoint) when a hardware watchpoint has |
| been defined. Also skip watchpoints which we know did not trigger |
| (did not match the data address). */ |
| |
| if ((b->type == bp_hardware_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint) |
| && b->watchpoint_triggered == watch_triggered_no) |
| return 0; |
| |
| if (b->type == bp_hardware_breakpoint) |
| { |
| if (bl->address != bp_addr) |
| return 0; |
| if (overlay_debugging /* unmapped overlay section */ |
| && section_is_overlay (bl->section) |
| && !section_is_mapped (bl->section)) |
| return 0; |
| } |
| |
| if (b->type == bp_catchpoint) |
| { |
| gdb_assert (b->ops != NULL && b->ops->breakpoint_hit != NULL); |
| if (!b->ops->breakpoint_hit (b)) |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /* If BS refers to a watchpoint, determine if the watched values |
| has actually changed, and we should stop. If not, set BS->stop |
| to 0. */ |
| static void |
| bpstat_check_watchpoint (bpstat bs) |
| { |
| const struct bp_location *bl = bs->breakpoint_at; |
| struct breakpoint *b = bl->owner; |
| |
| if (b->type == bp_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint |
| || b->type == bp_hardware_watchpoint) |
| { |
| CORE_ADDR addr; |
| struct value *v; |
| int must_check_value = 0; |
| |
| if (b->type == bp_watchpoint) |
| /* For a software watchpoint, we must always check the |
| watched value. */ |
| must_check_value = 1; |
| else if (b->watchpoint_triggered == watch_triggered_yes) |
| /* We have a hardware watchpoint (read, write, or access) |
| and the target earlier reported an address watched by |
| this watchpoint. */ |
| must_check_value = 1; |
| else if (b->watchpoint_triggered == watch_triggered_unknown |
| && b->type == bp_hardware_watchpoint) |
| /* We were stopped by a hardware watchpoint, but the target could |
| not report the data address. We must check the watchpoint's |
| value. Access and read watchpoints are out of luck; without |
| a data address, we can't figure it out. */ |
| must_check_value = 1; |
| |
| if (must_check_value) |
| { |
| char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n", |
| b->number); |
| struct cleanup *cleanups = make_cleanup (xfree, message); |
| int e = catch_errors (watchpoint_check, bs, message, |
| RETURN_MASK_ALL); |
| do_cleanups (cleanups); |
| switch (e) |
| { |
| case WP_DELETED: |
| /* We've already printed what needs to be printed. */ |
| bs->print_it = print_it_done; |
| /* Stop. */ |
| break; |
| case WP_VALUE_CHANGED: |
| if (b->type == bp_read_watchpoint) |
| { |
| /* Don't stop: read watchpoints shouldn't fire if |
| the value has changed. This is for targets |
| which cannot set read-only watchpoints. */ |
| bs->print_it = print_it_noop; |
| bs->stop = 0; |
| } |
| break; |
| case WP_VALUE_NOT_CHANGED: |
| if (b->type == bp_hardware_watchpoint |
| || b->type == bp_watchpoint) |
| { |
| /* Don't stop: write watchpoints shouldn't fire if |
| the value hasn't changed. */ |
| bs->print_it = print_it_noop; |
| bs->stop = 0; |
| } |
| /* Stop. */ |
| break; |
| default: |
| /* Can't happen. */ |
| case 0: |
| /* Error from catch_errors. */ |
| printf_filtered (_("Watchpoint %d deleted.\n"), b->number); |
| if (b->related_breakpoint) |
| b->related_breakpoint->disposition = disp_del_at_next_stop; |
| b->disposition = disp_del_at_next_stop; |
| /* We've already printed what needs to be printed. */ |
| bs->print_it = print_it_done; |
| break; |
| } |
| } |
| else /* must_check_value == 0 */ |
| { |
| /* This is a case where some watchpoint(s) triggered, but |
| not at the address of this watchpoint, or else no |
| watchpoint triggered after all. So don't print |
| anything for this watchpoint. */ |
| bs->print_it = print_it_noop; |
| bs->stop = 0; |
| } |
| } |
| } |
| |
| |
| /* Check conditions (condition proper, frame, thread and ignore count) |
| of breakpoint referred to by BS. If we should not stop for this |
| breakpoint, set BS->stop to 0. */ |
| static void |
| bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid) |
| { |
| int thread_id = pid_to_thread_id (ptid); |
| const struct bp_location *bl = bs->breakpoint_at; |
| struct breakpoint *b = bl->owner; |
| |
| if (frame_id_p (b->frame_id) |
| && !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ()))) |
| bs->stop = 0; |
| else if (bs->stop) |
| { |
| int value_is_zero = 0; |
| |
| /* If this is a scope breakpoint, mark the associated |
| watchpoint as triggered so that we will handle the |
| out-of-scope event. We'll get to the watchpoint next |
| iteration. */ |
| if (b->type == bp_watchpoint_scope) |
| b->related_breakpoint->watchpoint_triggered = watch_triggered_yes; |
| |
| if (bl->cond && bl->owner->disposition != disp_del_at_next_stop) |
| { |
| /* Need to select the frame, with all that implies |
| so that the conditions will have the right context. */ |
| select_frame (get_current_frame ()); |
| value_is_zero |
| = catch_errors (breakpoint_cond_eval, (bl->cond), |
| "Error in testing breakpoint condition:\n", |
| RETURN_MASK_ALL); |
| /* FIXME-someday, should give breakpoint # */ |
| free_all_values (); |
| } |
| if (bl->cond && value_is_zero) |
| { |
| bs->stop = 0; |
| } |
| else if (b->thread != -1 && b->thread != thread_id) |
| { |
| bs->stop = 0; |
| } |
| else if (b->ignore_count > 0) |
| { |
| b->ignore_count--; |
| annotate_ignore_count_change (); |
| bs->stop = 0; |
| /* Increase the hit count even though we don't |
| stop. */ |
| ++(b->hit_count); |
| } |
| } |
| } |
| |
| |
| /* Get a bpstat associated with having just stopped at address |
| BP_ADDR in thread PTID. |
| |
| Determine whether we stopped at a breakpoint, etc, or whether we |
| don't understand this stop. Result is a chain of bpstat's such that: |
| |
| if we don't understand the stop, the result is a null pointer. |
| |
| if we understand why we stopped, the result is not null. |
| |
| Each element of the chain refers to a particular breakpoint or |
| watchpoint at which we have stopped. (We may have stopped for |
| several reasons concurrently.) |
| |
| Each element of the chain has valid next, breakpoint_at, |
| commands, FIXME??? fields. */ |
| |
| bpstat |
| bpstat_stop_status (CORE_ADDR bp_addr, ptid_t ptid) |
| { |
| struct breakpoint *b = NULL; |
| const struct bp_location *bl; |
| struct bp_location *loc; |
| /* Root of the chain of bpstat's */ |
| struct bpstats root_bs[1]; |
| /* Pointer to the last thing in the chain currently. */ |
| bpstat bs = root_bs; |
| int ix; |
| int need_remove_insert; |
| |
| ALL_BP_LOCATIONS (bl) |
| { |
| b = bl->owner; |
| gdb_assert (b); |
| if (!breakpoint_enabled (b) && b->enable_state != bp_permanent) |
| continue; |
| |
| /* For hardware watchpoints, we look only at the first location. |
| The watchpoint_check function will work on entire expression, |
| not the individual locations. For read watchopints, the |
| watchpoints_triggered function have checked all locations |
| alrea |
| */ |
| if (b->type == bp_hardware_watchpoint && bl != b->loc) |
| continue; |
| |
| if (!bpstat_check_location (bl, bp_addr)) |
| continue; |
| |
| /* Come here if it's a watchpoint, or if the break address matches */ |
| |
| bs = bpstat_alloc (bl, bs); /* Alloc a bpstat to explain stop */ |
| |
| /* Assume we stop. Should we find watchpoint that is not actually |
| triggered, or if condition of breakpoint is false, we'll reset |
| 'stop' to 0. */ |
| bs->stop = 1; |
| bs->print = 1; |
| |
| bpstat_check_watchpoint (bs); |
| if (!bs->stop) |
| continue; |
| |
| if (b->type == bp_thread_event || b->type == bp_overlay_event) |
| /* We do not stop for these. */ |
| bs->stop = 0; |
| else |
| bpstat_check_breakpoint_conditions (bs, ptid); |
| |
| if (bs->stop) |
| { |
| ++(b->hit_count); |
| |
| /* We will stop here */ |
| if (b->disposition == disp_disable) |
| { |
| if (b->enable_state != bp_permanent) |
| b->enable_state = bp_disabled; |
| update_global_location_list (0); |
| } |
| if (b->silent) |
| bs->print = 0; |
| bs->commands = b->commands; |
| if (bs->commands && |
| (strcmp ("silent", bs->commands->line) == 0 |
| || (xdb_commands && strcmp ("Q", bs->commands->line) == 0))) |
| { |
| bs->commands = bs->commands->next; |
| bs->print = 0; |
| } |
| bs->commands = copy_command_lines (bs->commands); |
| } |
| |
| /* Print nothing for this entry if we dont stop or if we dont print. */ |
| if (bs->stop == 0 || bs->print == 0) |
| bs->print_it = print_it_noop; |
| } |
| |
| for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix) |
| { |
| if (loc->address == bp_addr) |
| { |
| bs = bpstat_alloc (loc, bs); |
| /* For hits of moribund locations, we should just proceed. */ |
| bs->stop = 0; |
| bs->print = 0; |
| bs->print_it = print_it_noop; |
| } |
| } |
| |
| bs->next = NULL; /* Terminate the chain */ |
| bs = root_bs->next; /* Re-grab the head of the chain */ |
| |
| /* If we aren't stopping, the value of some hardware watchpoint may |
| not have changed, but the intermediate memory locations we are |
| watching may have. Don't bother if we're stopping; this will get |
| done later. */ |
| for (bs = root_bs->next; bs != NULL; bs = bs->next) |
| if (bs->stop) |
| break; |
| |
| need_remove_insert = 0; |
| if (bs == NULL) |
| for (bs = root_bs->next; bs != NULL; bs = bs->next) |
| if (!bs->stop |
| && bs->breakpoint_at->owner |
| && (bs->breakpoint_at->owner->type == bp_hardware_watchpoint |
| || bs->breakpoint_at->owner->type == bp_read_watchpoint |
| || bs->breakpoint_at->owner->type == bp_access_watchpoint)) |
| { |
| /* remove/insert can invalidate bs->breakpoint_at, if this |
| location is no longer used by the watchpoint. Prevent |
| further code from trying to use it. */ |
| bs->breakpoint_at = NULL; |
| need_remove_insert = 1; |
| } |
| |
| if (need_remove_insert) |
| { |
| remove_breakpoints (); |
| insert_breakpoints (); |
| } |
| |
| return root_bs->next; |
| } |
| |
| /* Tell what to do about this bpstat. */ |
| struct bpstat_what |
| bpstat_what (bpstat bs) |
| { |
| /* Classify each bpstat as one of the following. */ |
| enum class |
| { |
| /* This bpstat element has no effect on the main_action. */ |
| no_effect = 0, |
| |
| /* There was a watchpoint, stop but don't print. */ |
| wp_silent, |
| |
| /* There was a watchpoint, stop and print. */ |
| wp_noisy, |
| |
| /* There was a breakpoint but we're not stopping. */ |
| bp_nostop, |
| |
| /* There was a breakpoint, stop but don't print. */ |
| bp_silent, |
| |
| /* There was a breakpoint, stop and print. */ |
| bp_noisy, |
| |
| /* We hit the longjmp breakpoint. */ |
| long_jump, |
| |
| /* We hit the longjmp_resume breakpoint. */ |
| long_resume, |
| |
| /* We hit the step_resume breakpoint. */ |
| step_resume, |
| |
| /* We hit the shared library event breakpoint. */ |
| shlib_event, |
| |
| /* This is just used to count how many enums there are. */ |
| class_last |
| }; |
| |
| /* Here is the table which drives this routine. So that we can |
| format it pretty, we define some abbreviations for the |
| enum bpstat_what codes. */ |
| #define kc BPSTAT_WHAT_KEEP_CHECKING |
| #define ss BPSTAT_WHAT_STOP_SILENT |
| #define sn BPSTAT_WHAT_STOP_NOISY |
| #define sgl BPSTAT_WHAT_SINGLE |
| #define slr BPSTAT_WHAT_SET_LONGJMP_RESUME |
| #define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME |
| #define sr BPSTAT_WHAT_STEP_RESUME |
| #define shl BPSTAT_WHAT_CHECK_SHLIBS |
| |
| /* "Can't happen." Might want to print an error message. |
| abort() is not out of the question, but chances are GDB is just |
| a bit confused, not unusable. */ |
| #define err BPSTAT_WHAT_STOP_NOISY |
| |
| /* Given an old action and a class, come up with a new action. */ |
| /* One interesting property of this table is that wp_silent is the same |
| as bp_silent and wp_noisy is the same as bp_noisy. That is because |
| after stopping, the check for whether to step over a breakpoint |
| (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without |
| reference to how we stopped. We retain separate wp_silent and |
| bp_silent codes in case we want to change that someday. |
| |
| Another possibly interesting property of this table is that |
| there's a partial ordering, priority-like, of the actions. Once |
| you've decided that some action is appropriate, you'll never go |
| back and decide something of a lower priority is better. The |
| ordering is: |
| |
| kc < clr sgl shl slr sn sr ss |
| sgl < shl slr sn sr ss |
| slr < err shl sn sr ss |
| clr < err shl sn sr ss |
| ss < shl sn sr |
| sn < shl sr |
| shl < sr |
| sr < |
| |
| What I think this means is that we don't need a damned table |
| here. If you just put the rows and columns in the right order, |
| it'd look awfully regular. We could simply walk the bpstat list |
| and choose the highest priority action we find, with a little |
| logic to handle the 'err' cases. */ |
| |
| /* step_resume entries: a step resume breakpoint overrides another |
| breakpoint of signal handling (see comment in wait_for_inferior |
| at where we set the step_resume breakpoint). */ |
| |
| static const enum bpstat_what_main_action |
| table[(int) class_last][(int) BPSTAT_WHAT_LAST] = |
| { |
| /* old action */ |
| /* kc ss sn sgl slr clr sr shl |
| */ |
| /*no_effect */ |
| {kc, ss, sn, sgl, slr, clr, sr, shl}, |
| /*wp_silent */ |
| {ss, ss, sn, ss, ss, ss, sr, shl}, |
| /*wp_noisy */ |
| {sn, sn, sn, sn, sn, sn, sr, shl}, |
| /*bp_nostop */ |
| {sgl, ss, sn, sgl, slr, slr, sr, shl}, |
| /*bp_silent */ |
| {ss, ss, sn, ss, ss, ss, sr, shl}, |
| /*bp_noisy */ |
| {sn, sn, sn, sn, sn, sn, sr, shl}, |
| /*long_jump */ |
| {slr, ss, sn, slr, slr, err, sr, shl}, |
| /*long_resume */ |
| {clr, ss, sn, err, err, err, sr, shl}, |
| /*step_resume */ |
| {sr, sr, sr, sr, sr, sr, sr, sr}, |
| /*shlib */ |
| {shl, shl, shl, shl, shl, shl, sr, shl} |
| }; |
| |
| #undef kc |
| #undef ss |
| #undef sn |
| #undef sgl |
| #undef slr |
| #undef clr |
| #undef err |
| #undef sr |
| #undef ts |
| #undef shl |
| enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING; |
| struct bpstat_what retval; |
| |
| retval.call_dummy = 0; |
| for (; bs != NULL; bs = bs->next) |
| { |
| enum class bs_class = no_effect; |
| if (bs->breakpoint_at == NULL) |
| /* I suspect this can happen if it was a momentary breakpoint |
| which has since been deleted. */ |
| continue; |
| if (bs->breakpoint_at->owner == NULL) |
| bs_class = bp_nostop; |
| else |
| switch (bs->breakpoint_at->owner->type) |
| { |
| case bp_none: |
| continue; |
| |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| case bp_until: |
| case bp_finish: |
| if (bs->stop) |
| { |
| if (bs->print) |
| bs_class = bp_noisy; |
| else |
| bs_class = bp_silent; |
| } |
| else |
| bs_class = bp_nostop; |
| break; |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| if (bs->stop) |
| { |
| if (bs->print) |
| bs_class = wp_noisy; |
| else |
| bs_class = wp_silent; |
| } |
| else |
| /* There was a watchpoint, but we're not stopping. |
| This requires no further action. */ |
| bs_class = no_effect; |
| break; |
| case bp_longjmp: |
| bs_class = long_jump; |
| break; |
| case bp_longjmp_resume: |
| bs_class = long_resume; |
| break; |
| case bp_step_resume: |
| if (bs->stop) |
| { |
| bs_class = step_resume; |
| } |
| else |
| /* It is for the wrong frame. */ |
| bs_class = bp_nostop; |
| break; |
| case bp_watchpoint_scope: |
| bs_class = bp_nostop; |
| break; |
| case bp_shlib_event: |
| bs_class = shlib_event; |
| break; |
| case bp_thread_event: |
| case bp_overlay_event: |
| bs_class = bp_nostop; |
| break; |
| case bp_catchpoint: |
| if (bs->stop) |
| { |
| if (bs->print) |
| bs_class = bp_noisy; |
| else |
| bs_class = bp_silent; |
| } |
| else |
| /* There was a catchpoint, but we're not stopping. |
| This requires no further action. */ |
| bs_class = no_effect; |
| break; |
| case bp_call_dummy: |
| /* Make sure the action is stop (silent or noisy), |
| so infrun.c pops the dummy frame. */ |
| bs_class = bp_silent; |
| retval.call_dummy = 1; |
| break; |
| } |
| current_action = table[(int) bs_class][(int) current_action]; |
| } |
| retval.main_action = current_action; |
| return retval; |
| } |
| |
| /* Nonzero if we should step constantly (e.g. watchpoints on machines |
| without hardware support). This isn't related to a specific bpstat, |
| just to things like whether watchpoints are set. */ |
| |
| int |
| bpstat_should_step (void) |
| { |
| struct breakpoint *b; |
| ALL_BREAKPOINTS (b) |
| if (breakpoint_enabled (b) && b->type == bp_watchpoint) |
| return 1; |
| return 0; |
| } |
| |
| |
| |
| static void print_breakpoint_location (struct breakpoint *b, |
| struct bp_location *loc, |
| char *wrap_indent, |
| struct ui_stream *stb) |
| { |
| if (b->source_file) |
| { |
| struct symbol *sym |
| = find_pc_sect_function (loc->address, loc->section); |
| if (sym) |
| { |
| ui_out_text (uiout, "in "); |
| ui_out_field_string (uiout, "func", |
| SYMBOL_PRINT_NAME (sym)); |
| ui_out_wrap_hint (uiout, wrap_indent); |
| ui_out_text (uiout, " at "); |
| } |
| ui_out_field_string (uiout, "file", b->source_file); |
| ui_out_text (uiout, ":"); |
| |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| struct symtab_and_line sal = find_pc_line (loc->address, 0); |
| char *fullname = symtab_to_fullname (sal.symtab); |
| |
| if (fullname) |
| ui_out_field_string (uiout, "fullname", fullname); |
| } |
| |
| ui_out_field_int (uiout, "line", b->line_number); |
| } |
| else if (!b->loc) |
| { |
| ui_out_field_string (uiout, "pending", b->addr_string); |
| } |
| else |
| { |
| print_address_symbolic (loc->address, stb->stream, demangle, ""); |
| ui_out_field_stream (uiout, "at", stb); |
| } |
| } |
| |
| /* Print B to gdb_stdout. */ |
| static void |
| print_one_breakpoint_location (struct breakpoint *b, |
| struct bp_location *loc, |
| int loc_number, |
| CORE_ADDR *last_addr) |
| { |
| struct command_line *l; |
| struct symbol *sym; |
| struct ep_type_description |
| { |
| enum bptype type; |
| char *description; |
| }; |
| static struct ep_type_description bptypes[] = |
| { |
| {bp_none, "?deleted?"}, |
| {bp_breakpoint, "breakpoint"}, |
| {bp_hardware_breakpoint, "hw breakpoint"}, |
| {bp_until, "until"}, |
| {bp_finish, "finish"}, |
| {bp_watchpoint, "watchpoint"}, |
| {bp_hardware_watchpoint, "hw watchpoint"}, |
| {bp_read_watchpoint, "read watchpoint"}, |
| {bp_access_watchpoint, "acc watchpoint"}, |
| {bp_longjmp, "longjmp"}, |
| {bp_longjmp_resume, "longjmp resume"}, |
| {bp_step_resume, "step resume"}, |
| {bp_watchpoint_scope, "watchpoint scope"}, |
| {bp_call_dummy, "call dummy"}, |
| {bp_shlib_event, "shlib events"}, |
| {bp_thread_event, "thread events"}, |
| {bp_overlay_event, "overlay events"}, |
| {bp_catchpoint, "catchpoint"}, |
| }; |
| |
| static char bpenables[] = "nynny"; |
| char wrap_indent[80]; |
| struct ui_stream *stb = ui_out_stream_new (uiout); |
| struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb); |
| struct cleanup *bkpt_chain; |
| |
| int header_of_multiple = 0; |
| int part_of_multiple = (loc != NULL); |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| |
| gdb_assert (!loc || loc_number != 0); |
| /* See comment in print_one_breakpoint concerning |
| treatment of breakpoints with single disabled |
| location. */ |
| if (loc == NULL |
| && (b->loc != NULL |
| && (b->loc->next != NULL || !b->loc->enabled))) |
| header_of_multiple = 1; |
| if (loc == NULL) |
| loc = b->loc; |
| |
| annotate_record (); |
| bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt"); |
| |
| /* 1 */ |
| annotate_field (0); |
| if (part_of_multiple) |
| { |
| char *formatted; |
| formatted = xstrprintf ("%d.%d", b->number, loc_number); |
| ui_out_field_string (uiout, "number", formatted); |
| xfree (formatted); |
| } |
| else |
| { |
| ui_out_field_int (uiout, "number", b->number); |
| } |
| |
| /* 2 */ |
| annotate_field (1); |
| if (part_of_multiple) |
| ui_out_field_skip (uiout, "type"); |
| else |
| { |
| if (((int) b->type >= (sizeof (bptypes) / sizeof (bptypes[0]))) |
| || ((int) b->type != bptypes[(int) b->type].type)) |
| internal_error (__FILE__, __LINE__, |
| _("bptypes table does not describe type #%d."), |
| (int) b->type); |
| ui_out_field_string (uiout, "type", bptypes[(int) b->type].description); |
| } |
| |
| /* 3 */ |
| annotate_field (2); |
| if (part_of_multiple) |
| ui_out_field_skip (uiout, "disp"); |
| else |
| ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| |
| |
| /* 4 */ |
| annotate_field (3); |
| if (part_of_multiple) |
| ui_out_field_string (uiout, "enabled", loc->enabled ? "y" : "n"); |
| else |
| ui_out_field_fmt (uiout, "enabled", "%c", |
| bpenables[(int) b->enable_state]); |
| ui_out_spaces (uiout, 2); |
| |
| |
| /* 5 and 6 */ |
| strcpy (wrap_indent, " "); |
| if (opts.addressprint) |
| { |
| if (gdbarch_addr_bit (current_gdbarch) <= 32) |
| strcat (wrap_indent, " "); |
| else |
| strcat (wrap_indent, " "); |
| } |
| |
| if (b->ops != NULL && b->ops->print_one != NULL) |
| { |
| /* Although the print_one can possibly print |
| all locations, calling it here is not likely |
| to get any nice result. So, make sure there's |
| just one location. */ |
| gdb_assert (b->loc == NULL || b->loc->next == NULL); |
| b->ops->print_one (b, last_addr); |
| } |
| else |
| switch (b->type) |
| { |
| case bp_none: |
| internal_error (__FILE__, __LINE__, |
| _("print_one_breakpoint: bp_none encountered\n")); |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (opts.addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "what", stb); |
| break; |
| |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| case bp_until: |
| case bp_finish: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| case bp_shlib_event: |
| case bp_thread_event: |
| case bp_overlay_event: |
| if (opts.addressprint) |
| { |
| annotate_field (4); |
| if (header_of_multiple) |
| ui_out_field_string (uiout, "addr", "<MULTIPLE>"); |
| else if (b->loc == NULL || loc->shlib_disabled) |
| ui_out_field_string (uiout, "addr", "<PENDING>"); |
| else |
| ui_out_field_core_addr (uiout, "addr", loc->address); |
| } |
| annotate_field (5); |
| if (!header_of_multiple) |
| print_breakpoint_location (b, loc, wrap_indent, stb); |
| if (b->loc) |
| *last_addr = b->loc->address; |
| break; |
| } |
| |
| if (!part_of_multiple && b->thread != -1) |
| { |
| /* FIXME: This seems to be redundant and lost here; see the |
| "stop only in" line a little further down. */ |
| ui_out_text (uiout, " thread "); |
| ui_out_field_int (uiout, "thread", b->thread); |
| } |
| |
| ui_out_text (uiout, "\n"); |
| |
| if (part_of_multiple && frame_id_p (b->frame_id)) |
| { |
| annotate_field (6); |
| ui_out_text (uiout, "\tstop only in stack frame at "); |
| /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside |
| the frame ID. */ |
| ui_out_field_core_addr (uiout, "frame", b->frame_id.stack_addr); |
| ui_out_text (uiout, "\n"); |
| } |
| |
| if (!part_of_multiple && b->cond_string && !ada_exception_catchpoint_p (b)) |
| { |
| /* We do not print the condition for Ada exception catchpoints |
| because the condition is an internal implementation detail |
| that we do not want to expose to the user. */ |
| annotate_field (7); |
| ui_out_text (uiout, "\tstop only if "); |
| ui_out_field_string (uiout, "cond", b->cond_string); |
| ui_out_text (uiout, "\n"); |
| } |
| |
| if (!part_of_multiple && b->thread != -1) |
| { |
| /* FIXME should make an annotation for this */ |
| ui_out_text (uiout, "\tstop only in thread "); |
| ui_out_field_int (uiout, "thread", b->thread); |
| ui_out_text (uiout, "\n"); |
| } |
| |
| if (!part_of_multiple && b->hit_count) |
| { |
| /* FIXME should make an annotation for this */ |
| if (ep_is_catchpoint (b)) |
| ui_out_text (uiout, "\tcatchpoint"); |
| else |
| ui_out_text (uiout, "\tbreakpoint"); |
| ui_out_text (uiout, " already hit "); |
| ui_out_field_int (uiout, "times", b->hit_count); |
| if (b->hit_count == 1) |
| ui_out_text (uiout, " time\n"); |
| else |
| ui_out_text (uiout, " times\n"); |
| } |
| |
| /* Output the count also if it is zero, but only if this is |
| mi. FIXME: Should have a better test for this. */ |
| if (ui_out_is_mi_like_p (uiout)) |
| if (!part_of_multiple && b->hit_count == 0) |
| ui_out_field_int (uiout, "times", b->hit_count); |
| |
| if (!part_of_multiple && b->ignore_count) |
| { |
| annotate_field (8); |
| ui_out_text (uiout, "\tignore next "); |
| ui_out_field_int (uiout, "ignore", b->ignore_count); |
| ui_out_text (uiout, " hits\n"); |
| } |
| |
| if (!part_of_multiple && (l = b->commands)) |
| { |
| struct cleanup *script_chain; |
| |
| annotate_field (9); |
| script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script"); |
| print_command_lines (uiout, l, 4); |
| do_cleanups (script_chain); |
| } |
| |
| if (ui_out_is_mi_like_p (uiout) && !part_of_multiple) |
| { |
| if (b->addr_string) |
| ui_out_field_string (uiout, "original-location", b->addr_string); |
| else if (b->exp_string) |
| ui_out_field_string (uiout, "original-location", b->exp_string); |
| } |
| |
| do_cleanups (bkpt_chain); |
| do_cleanups (old_chain); |
| } |
| |
| static void |
| print_one_breakpoint (struct breakpoint *b, |
| CORE_ADDR *last_addr) |
| { |
| print_one_breakpoint_location (b, NULL, 0, last_addr); |
| |
| /* If this breakpoint has custom print function, |
| it's already printed. Otherwise, print individual |
| locations, if any. */ |
| if (b->ops == NULL || b->ops->print_one == NULL) |
| { |
| /* If breakpoint has a single location that is |
| disabled, we print it as if it had |
| several locations, since otherwise it's hard to |
| represent "breakpoint enabled, location disabled" |
| situation. |
| Note that while hardware watchpoints have |
| several locations internally, that's no a property |
| exposed to user. */ |
| if (b->loc |
| && !is_hardware_watchpoint (b) |
| && (b->loc->next || !b->loc->enabled) |
| && !ui_out_is_mi_like_p (uiout)) |
| { |
| struct bp_location *loc; |
| int n = 1; |
| for (loc = b->loc; loc; loc = loc->next, ++n) |
| print_one_breakpoint_location (b, loc, n, last_addr); |
| } |
| } |
| } |
| |
| |
| struct captured_breakpoint_query_args |
| { |
| int bnum; |
| }; |
| |
| static int |
| do_captured_breakpoint_query (struct ui_out *uiout, void *data) |
| { |
| struct captured_breakpoint_query_args *args = data; |
| struct breakpoint *b; |
| CORE_ADDR dummy_addr = 0; |
| ALL_BREAKPOINTS (b) |
| { |
| if (args->bnum == b->number) |
| { |
| print_one_breakpoint (b, &dummy_addr); |
| return GDB_RC_OK; |
| } |
| } |
| return GDB_RC_NONE; |
| } |
| |
| enum gdb_rc |
| gdb_breakpoint_query (struct ui_out *uiout, int bnum, char **error_message) |
| { |
| struct captured_breakpoint_query_args args; |
| args.bnum = bnum; |
| /* For the moment we don't trust print_one_breakpoint() to not throw |
| an error. */ |
| if (catch_exceptions_with_msg (uiout, do_captured_breakpoint_query, &args, |
| error_message, RETURN_MASK_ALL) < 0) |
| return GDB_RC_FAIL; |
| else |
| return GDB_RC_OK; |
| } |
| |
| /* Return non-zero if B is user settable (breakpoints, watchpoints, |
| catchpoints, et.al.). */ |
| |
| static int |
| user_settable_breakpoint (const struct breakpoint *b) |
| { |
| return (b->type == bp_breakpoint |
| || b->type == bp_catchpoint |
| || b->type == bp_hardware_breakpoint |
| || b->type == bp_watchpoint |
| || b->type == bp_read_watchpoint |
| || b->type == bp_access_watchpoint |
| || b->type == bp_hardware_watchpoint); |
| } |
| |
| /* Print information on user settable breakpoint (watchpoint, etc) |
| number BNUM. If BNUM is -1 print all user settable breakpoints. |
| If ALLFLAG is non-zero, include non- user settable breakpoints. */ |
| |
| static void |
| breakpoint_1 (int bnum, int allflag) |
| { |
| struct breakpoint *b; |
| CORE_ADDR last_addr = (CORE_ADDR) -1; |
| int nr_printable_breakpoints; |
| struct cleanup *bkpttbl_chain; |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| |
| /* Compute the number of rows in the table. */ |
| nr_printable_breakpoints = 0; |
| ALL_BREAKPOINTS (b) |
| if (bnum == -1 |
| || bnum == b->number) |
| { |
| if (allflag || user_settable_breakpoint (b)) |
| nr_printable_breakpoints++; |
| } |
| |
| if (opts.addressprint) |
| bkpttbl_chain |
| = make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints, |
| "BreakpointTable"); |
| else |
| bkpttbl_chain |
| = make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints, |
| "BreakpointTable"); |
| |
| if (nr_printable_breakpoints > 0) |
| annotate_breakpoints_headers (); |
| if (nr_printable_breakpoints > 0) |
| annotate_field (0); |
| ui_out_table_header (uiout, 7, ui_left, "number", "Num"); /* 1 */ |
| if (nr_printable_breakpoints > 0) |
| annotate_field (1); |
| ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */ |
| if (nr_printable_breakpoints > 0) |
| annotate_field (2); |
| ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */ |
| if (nr_printable_breakpoints > 0) |
| annotate_field (3); |
| ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */ |
| if (opts.addressprint) |
| { |
| if (nr_printable_breakpoints > 0) |
| annotate_field (4); |
| if (gdbarch_addr_bit (current_gdbarch) <= 32) |
| ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */ |
| else |
| ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */ |
| } |
| if (nr_printable_breakpoints > 0) |
| annotate_field (5); |
| ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */ |
| ui_out_table_body (uiout); |
| if (nr_printable_breakpoints > 0) |
| annotate_breakpoints_table (); |
| |
| ALL_BREAKPOINTS (b) |
| if (bnum == -1 |
| || bnum == b->number) |
| { |
| /* We only print out user settable breakpoints unless the |
| allflag is set. */ |
| if (allflag || user_settable_breakpoint (b)) |
| print_one_breakpoint (b, &last_addr); |
| } |
| |
| do_cleanups (bkpttbl_chain); |
| |
| if (nr_printable_breakpoints == 0) |
| { |
| if (bnum == -1) |
| ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n"); |
| else |
| ui_out_message (uiout, 0, "No breakpoint or watchpoint number %d.\n", |
| bnum); |
| } |
| else |
| { |
| /* Compare against (CORE_ADDR)-1 in case some compiler decides |
| that a comparison of an unsigned with -1 is always false. */ |
| if (last_addr != (CORE_ADDR) -1 && !server_command) |
| set_next_address (current_gdbarch, last_addr); |
| } |
| |
| /* FIXME? Should this be moved up so that it is only called when |
| there have been breakpoints? */ |
| annotate_breakpoints_table_end (); |
| } |
| |
| static void |
| breakpoints_info (char *bnum_exp, int from_tty) |
| { |
| int bnum = -1; |
| |
| if (bnum_exp) |
| bnum = parse_and_eval_long (bnum_exp); |
| |
| breakpoint_1 (bnum, 0); |
| } |
| |
| static void |
| maintenance_info_breakpoints (char *bnum_exp, int from_tty) |
| { |
| int bnum = -1; |
| |
| if (bnum_exp) |
| bnum = parse_and_eval_long (bnum_exp); |
| |
| breakpoint_1 (bnum, 1); |
| } |
| |
| static int |
| breakpoint_has_pc (struct breakpoint *b, |
| CORE_ADDR pc, struct obj_section *section) |
| { |
| struct bp_location *bl = b->loc; |
| for (; bl; bl = bl->next) |
| { |
| if (bl->address == pc |
| && (!overlay_debugging || bl->section == section)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* Print a message describing any breakpoints set at PC. */ |
| |
| static void |
| describe_other_breakpoints (CORE_ADDR pc, struct obj_section *section, |
| int thread) |
| { |
| int others = 0; |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| others += breakpoint_has_pc (b, pc, section); |
| if (others > 0) |
| { |
| if (others == 1) |
| printf_filtered (_("Note: breakpoint ")); |
| else /* if (others == ???) */ |
| printf_filtered (_("Note: breakpoints ")); |
| ALL_BREAKPOINTS (b) |
| if (breakpoint_has_pc (b, pc, section)) |
| { |
| others--; |
| printf_filtered ("%d", b->number); |
| if (b->thread == -1 && thread != -1) |
| printf_filtered (" (all threads)"); |
| else if (b->thread != -1) |
| printf_filtered (" (thread %d)", b->thread); |
| printf_filtered ("%s%s ", |
| ((b->enable_state == bp_disabled || |
| b->enable_state == bp_call_disabled) |
| ? " (disabled)" |
| : b->enable_state == bp_permanent |
| ? " (permanent)" |
| : ""), |
| (others > 1) ? "," |
| : ((others == 1) ? " and" : "")); |
| } |
| printf_filtered (_("also set at pc ")); |
| fputs_filtered (paddress (pc), gdb_stdout); |
| printf_filtered (".\n"); |
| } |
| } |
| |
| /* Set the default place to put a breakpoint |
| for the `break' command with no arguments. */ |
| |
| void |
| set_default_breakpoint (int valid, CORE_ADDR addr, struct symtab *symtab, |
| int line) |
| { |
| default_breakpoint_valid = valid; |
| default_breakpoint_address = addr; |
| default_breakpoint_symtab = symtab; |
| default_breakpoint_line = line; |
| } |
| |
| /* Return true iff it is meaningful to use the address member of |
| BPT. For some breakpoint types, the address member is irrelevant |
| and it makes no sense to attempt to compare it to other addresses |
| (or use it for any other purpose either). |
| |
| More specifically, each of the following breakpoint types will always |
| have a zero valued address and we don't want check_duplicates() to mark |
| breakpoints of any of these types to be a duplicate of an actual |
| breakpoint at address zero: |
| |
| bp_watchpoint |
| bp_hardware_watchpoint |
| bp_read_watchpoint |
| bp_access_watchpoint |
| bp_catchpoint */ |
| |
| static int |
| breakpoint_address_is_meaningful (struct breakpoint *bpt) |
| { |
| enum bptype type = bpt->type; |
| |
| return (type != bp_watchpoint |
| && type != bp_hardware_watchpoint |
| && type != bp_read_watchpoint |
| && type != bp_access_watchpoint |
| && type != bp_catchpoint); |
| } |
| |
| /* Rescan breakpoints at the same address and section as BPT, |
| marking the first one as "first" and any others as "duplicates". |
| This is so that the bpt instruction is only inserted once. |
| If we have a permanent breakpoint at the same place as BPT, make |
| that one the official one, and the rest as duplicates. */ |
| |
| static void |
| check_duplicates_for (CORE_ADDR address, struct obj_section *section) |
| { |
| struct bp_location *b; |
| int count = 0; |
| struct bp_location *perm_bp = 0; |
| |
| ALL_BP_LOCATIONS (b) |
| if (b->owner->enable_state != bp_disabled |
| && b->owner->enable_state != bp_call_disabled |
| && b->enabled |
| && !b->shlib_disabled |
| && b->address == address /* address / overlay match */ |
| && (!overlay_debugging || b->section == section) |
| && breakpoint_address_is_meaningful (b->owner)) |
| { |
| /* Have we found a permanent breakpoint? */ |
| if (b->owner->enable_state == bp_permanent) |
| { |
| perm_bp = b; |
| break; |
| } |
| |
| count++; |
| b->duplicate = count > 1; |
| } |
| |
| /* If we found a permanent breakpoint at this address, go over the |
| list again and declare all the other breakpoints there to be the |
| duplicates. */ |
| if (perm_bp) |
| { |
| perm_bp->duplicate = 0; |
| |
| /* Permanent breakpoint should always be inserted. */ |
| if (! perm_bp->inserted) |
| internal_error (__FILE__, __LINE__, |
| _("allegedly permanent breakpoint is not " |
| "actually inserted")); |
| |
| ALL_BP_LOCATIONS (b) |
| if (b != perm_bp) |
| { |
| if (b->owner->enable_state != bp_disabled |
| && b->owner->enable_state != bp_call_disabled |
| && b->enabled && !b->shlib_disabled |
| && b->address == address /* address / overlay match */ |
| && (!overlay_debugging || b->section == section) |
| && breakpoint_address_is_meaningful (b->owner)) |
| { |
| if (b->inserted) |
| internal_error (__FILE__, __LINE__, |
| _("another breakpoint was inserted on top of " |
| "a permanent breakpoint")); |
| |
| b->duplicate = 1; |
| } |
| } |
| } |
| } |
| |
| static void |
| check_duplicates (struct breakpoint *bpt) |
| { |
| struct bp_location *bl = bpt->loc; |
| |
| if (! breakpoint_address_is_meaningful (bpt)) |
| return; |
| |
| for (; bl; bl = bl->next) |
| check_duplicates_for (bl->address, bl->section); |
| } |
| |
| static void |
| breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr, |
| int bnum, int have_bnum) |
| { |
| char astr1[40]; |
| char astr2[40]; |
| |
| strcpy (astr1, hex_string_custom ((unsigned long) from_addr, 8)); |
| strcpy (astr2, hex_string_custom ((unsigned long) to_addr, 8)); |
| if (have_bnum) |
| warning (_("Breakpoint %d address previously adjusted from %s to %s."), |
| bnum, astr1, astr2); |
| else |
| warning (_("Breakpoint address adjusted from %s to %s."), astr1, astr2); |
| } |
| |
| /* Adjust a breakpoint's address to account for architectural constraints |
| on breakpoint placement. Return the adjusted address. Note: Very |
| few targets require this kind of adjustment. For most targets, |
| this function is simply the identity function. */ |
| |
| static CORE_ADDR |
| adjust_breakpoint_address (CORE_ADDR bpaddr, enum bptype bptype) |
| { |
| if (!gdbarch_adjust_breakpoint_address_p (current_gdbarch)) |
| { |
| /* Very few targets need any kind of breakpoint adjustment. */ |
| return bpaddr; |
| } |
| else if (bptype == bp_watchpoint |
| || bptype == bp_hardware_watchpoint |
| || bptype == bp_read_watchpoint |
| || bptype == bp_access_watchpoint |
| || bptype == bp_catchpoint) |
| { |
| /* Watchpoints and the various bp_catch_* eventpoints should not |
| have their addresses modified. */ |
| return bpaddr; |
| } |
| else |
| { |
| CORE_ADDR adjusted_bpaddr; |
| |
| /* Some targets have architectural constraints on the placement |
| of breakpoint instructions. Obtain the adjusted address. */ |
| adjusted_bpaddr = gdbarch_adjust_breakpoint_address (current_gdbarch, |
| bpaddr); |
| |
| /* An adjusted breakpoint address can significantly alter |
| a user's expectations. Print a warning if an adjustment |
| is required. */ |
| if (adjusted_bpaddr != bpaddr) |
| breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0); |
| |
| return adjusted_bpaddr; |
| } |
| } |
| |
| /* Allocate a struct bp_location. */ |
| |
| static struct bp_location * |
| allocate_bp_location (struct breakpoint *bpt) |
| { |
| struct bp_location *loc, *loc_p; |
| |
| loc = xmalloc (sizeof (struct bp_location)); |
| memset (loc, 0, sizeof (*loc)); |
| |
| loc->owner = bpt; |
| loc->cond = NULL; |
| loc->shlib_disabled = 0; |
| loc->enabled = 1; |
| |
| switch (bpt->type) |
| { |
| case bp_breakpoint: |
| case bp_until: |
| case bp_finish: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| case bp_shlib_event: |
| case bp_thread_event: |
| case bp_overlay_event: |
| loc->loc_type = bp_loc_software_breakpoint; |
| break; |
| case bp_hardware_breakpoint: |
| loc->loc_type = bp_loc_hardware_breakpoint; |
| break; |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| loc->loc_type = bp_loc_hardware_watchpoint; |
| break; |
| case bp_watchpoint: |
| case bp_catchpoint: |
| loc->loc_type = bp_loc_other; |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, _("unknown breakpoint type")); |
| } |
| |
| return loc; |
| } |
| |
| static void free_bp_location (struct bp_location *loc) |
| { |
| if (loc->cond) |
| xfree (loc->cond); |
| |
| if (loc->function_name) |
| xfree (loc->function_name); |
| |
| xfree (loc); |
| } |
| |
| /* Helper to set_raw_breakpoint below. Creates a breakpoint |
| that has type BPTYPE and has no locations as yet. */ |
| |
| static struct breakpoint * |
| set_raw_breakpoint_without_location (enum bptype bptype) |
| { |
| struct breakpoint *b, *b1; |
| |
| b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); |
| memset (b, 0, sizeof (*b)); |
| |
| b->type = bptype; |
| b->language = current_language->la_language; |
| b->input_radix = input_radix; |
| b->thread = -1; |
| b->enable_state = bp_enabled; |
| b->next = 0; |
| b->silent = 0; |
| b->ignore_count = 0; |
| b->commands = NULL; |
| b->frame_id = null_frame_id; |
| b->forked_inferior_pid = null_ptid; |
| b->exec_pathname = NULL; |
| b->ops = NULL; |
| b->condition_not_parsed = 0; |
| |
| /* Add this breakpoint to the end of the chain |
| so that a list of breakpoints will come out in order |
| of increasing numbers. */ |
| |
| b1 = breakpoint_chain; |
| if (b1 == 0) |
| breakpoint_chain = b; |
| else |
| { |
| while (b1->next) |
| b1 = b1->next; |
| b1->next = b; |
| } |
| return b; |
| } |
| |
| /* Initialize loc->function_name. */ |
| static void |
| set_breakpoint_location_function (struct bp_location *loc) |
| { |
| if (loc->owner->type == bp_breakpoint |
| || loc->owner->type == bp_hardware_breakpoint) |
| { |
| find_pc_partial_function (loc->address, &(loc->function_name), |
| NULL, NULL); |
| if (loc->function_name) |
| loc->function_name = xstrdup (loc->function_name); |
| } |
| } |
| |
| /* set_raw_breakpoint is a low level routine for allocating and |
| partially initializing a breakpoint of type BPTYPE. The newly |
| created breakpoint's address, section, source file name, and line |
| number are provided by SAL. The newly created and partially |
| initialized breakpoint is added to the breakpoint chain and |
| is also returned as the value of this function. |
| |
| It is expected that the caller will complete the initialization of |
| the newly created breakpoint struct as well as output any status |
| information regarding the creation of a new breakpoint. In |
| particular, set_raw_breakpoint does NOT set the breakpoint |
| number! Care should be taken to not allow an error to occur |
| prior to completing the initialization of the breakpoint. If this |
| should happen, a bogus breakpoint will be left on the chain. */ |
| |
| struct breakpoint * |
| set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype) |
| { |
| struct breakpoint *b = set_raw_breakpoint_without_location (bptype); |
| CORE_ADDR adjusted_address; |
| |
| /* Adjust the breakpoint's address prior to allocating a location. |
| Once we call allocate_bp_location(), that mostly uninitialized |
| location will be placed on the location chain. Adjustment of the |
| breakpoint may cause target_read_memory() to be called and we do |
| not want its scan of the location chain to find a breakpoint and |
| location that's only been partially initialized. */ |
| adjusted_address = adjust_breakpoint_address (sal.pc, b->type); |
| |
| b->loc = allocate_bp_location (b); |
| b->loc->requested_address = sal.pc; |
| b->loc->address = adjusted_address; |
| |
| if (sal.symtab == NULL) |
| b->source_file = NULL; |
| else |
| b->source_file = savestring (sal.symtab->filename, |
| strlen (sal.symtab->filename)); |
| b->loc->section = sal.section; |
| b->line_number = sal.line; |
| |
| set_breakpoint_location_function (b->loc); |
| |
| breakpoints_changed (); |
| |
| return b; |
| } |
| |
| |
| /* Note that the breakpoint object B describes a permanent breakpoint |
| instruction, hard-wired into the inferior's code. */ |
| void |
| make_breakpoint_permanent (struct breakpoint *b) |
| { |
| struct bp_location *bl; |
| b->enable_state = bp_permanent; |
| |
| /* By definition, permanent breakpoints are already present in the code. |
| Mark all locations as inserted. For now, make_breakpoint_permanent |
| is called in just one place, so it's hard to say if it's reasonable |
| to have permanent breakpoint with multiple locations or not, |
| but it's easy to implmement. */ |
| for (bl = b->loc; bl; bl = bl->next) |
| bl->inserted = 1; |
| } |
| |
| static struct breakpoint * |
| create_internal_breakpoint (CORE_ADDR address, enum bptype type) |
| { |
| static int internal_breakpoint_number = -1; |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| |
| init_sal (&sal); /* initialize to zeroes */ |
| |
| sal.pc = address; |
| sal.section = find_pc_overlay (sal.pc); |
| |
| b = set_raw_breakpoint (sal, type); |
| b->number = internal_breakpoint_number--; |
| b->disposition = disp_donttouch; |
| |
| return b; |
| } |
| |
| |
| static void |
| create_longjmp_breakpoint (char *func_name) |
| { |
| struct minimal_symbol *m; |
| |
| if ((m = lookup_minimal_symbol_text (func_name, NULL)) == NULL) |
| return; |
| set_momentary_breakpoint_at_pc (SYMBOL_VALUE_ADDRESS (m), bp_longjmp); |
| update_global_location_list (1); |
| } |
| |
| /* Call this routine when stepping and nexting to enable a breakpoint |
| if we do a longjmp(). When we hit that breakpoint, call |
| set_longjmp_resume_breakpoint() to figure out where we are going. */ |
| |
| void |
| set_longjmp_breakpoint (void) |
| { |
| if (gdbarch_get_longjmp_target_p (current_gdbarch)) |
| { |
| create_longjmp_breakpoint ("longjmp"); |
| create_longjmp_breakpoint ("_longjmp"); |
| create_longjmp_breakpoint ("siglongjmp"); |
| create_longjmp_breakpoint ("_siglongjmp"); |
| } |
| } |
| |
| /* Delete all longjmp breakpoints from THREAD. */ |
| void |
| delete_longjmp_breakpoint (int thread) |
| { |
| struct breakpoint *b, *temp; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| if (b->type == bp_longjmp) |
| { |
| if (b->thread == thread) |
| delete_breakpoint (b); |
| } |
| } |
| |
| static void |
| create_overlay_event_breakpoint_1 (char *func_name, struct objfile *objfile) |
| { |
| struct breakpoint *b; |
| struct minimal_symbol *m; |
| |
| if ((m = lookup_minimal_symbol_text (func_name, objfile)) == NULL) |
| return; |
| |
| b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), |
| bp_overlay_event); |
| b->addr_string = xstrdup (func_name); |
| |
| if (overlay_debugging == ovly_auto) |
| { |
| b->enable_state = bp_enabled; |
| overlay_events_enabled = 1; |
| } |
| else |
| { |
| b->enable_state = bp_disabled; |
| overlay_events_enabled = 0; |
| } |
| update_global_location_list (1); |
| } |
| |
| static void |
| create_overlay_event_breakpoint (char *func_name) |
| { |
| struct objfile *objfile; |
| ALL_OBJFILES (objfile) |
| create_overlay_event_breakpoint_1 (func_name, objfile); |
| } |
| |
| void |
| enable_overlay_breakpoints (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_overlay_event) |
| { |
| b->enable_state = bp_enabled; |
| update_global_location_list (1); |
| overlay_events_enabled = 1; |
| } |
| } |
| |
| void |
| disable_overlay_breakpoints (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->type == bp_overlay_event) |
| { |
| b->enable_state = bp_disabled; |
| update_global_location_list (0); |
| overlay_events_enabled = 0; |
| } |
| } |
| |
| struct breakpoint * |
| create_thread_event_breakpoint (CORE_ADDR address) |
| { |
| struct breakpoint *b; |
| |
| b = create_internal_breakpoint (address, bp_thread_event); |
| |
| b->enable_state = bp_enabled; |
| /* addr_string has to be used or breakpoint_re_set will delete me. */ |
| b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address)); |
| |
| update_global_location_list_nothrow (1); |
| |
| return b; |
| } |
| |
| void |
| remove_thread_event_breakpoints (void) |
| { |
| struct breakpoint *b, *temp; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| if (b->type == bp_thread_event) |
| delete_breakpoint (b); |
| } |
| |
| struct captured_parse_breakpoint_args |
| { |
| char **arg_p; |
| struct symtabs_and_lines *sals_p; |
| char ***addr_string_p; |
| int *not_found_ptr; |
| }; |
| |
| struct lang_and_radix |
| { |
| enum language lang; |
| int radix; |
| }; |
| |
| |
| void |
| remove_solib_event_breakpoints (void) |
| { |
| struct breakpoint *b, *temp; |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| if (b->type == bp_shlib_event) |
| delete_breakpoint (b); |
| } |
| |
| struct breakpoint * |
| create_solib_event_breakpoint (CORE_ADDR address) |
| { |
| struct breakpoint *b; |
| |
| b = create_internal_breakpoint (address, bp_shlib_event); |
| update_global_location_list_nothrow (1); |
| return b; |
| } |
| |
| /* Disable any breakpoints that are on code in shared libraries. Only |
| apply to enabled breakpoints, disabled ones can just stay disabled. */ |
| |
| void |
| disable_breakpoints_in_shlibs (void) |
| { |
| struct bp_location *loc; |
| int disabled_shlib_breaks = 0; |
| |
| ALL_BP_LOCATIONS (loc) |
| { |
| struct breakpoint *b = loc->owner; |
| /* We apply the check to all breakpoints, including disabled |
| for those with loc->duplicate set. This is so that when breakpoint |
| becomes enabled, or the duplicate is removed, gdb will try to insert |
| all breakpoints. If we don't set shlib_disabled here, we'll try |
| to insert those breakpoints and fail. */ |
| if (((b->type == bp_breakpoint) || (b->type == bp_hardware_breakpoint)) |
| && !loc->shlib_disabled |
| #ifdef PC_SOLIB |
| && PC_SOLIB (loc->address) |
| #else |
| && solib_address (loc->address) |
| #endif |
| ) |
| { |
| loc->shlib_disabled = 1; |
| } |
| } |
| } |
| |
| /* Disable any breakpoints that are in in an unloaded shared library. Only |
| apply to enabled breakpoints, disabled ones can just stay disabled. */ |
| |
| static void |
| disable_breakpoints_in_unloaded_shlib (struct so_list *solib) |
| { |
| struct bp_location *loc; |
| int disabled_shlib_breaks = 0; |
| |
| ALL_BP_LOCATIONS (loc) |
| { |
| struct breakpoint *b = loc->owner; |
| if ((loc->loc_type == bp_loc_hardware_breakpoint |
| || loc->loc_type == bp_loc_software_breakpoint) |
| && !loc->shlib_disabled) |
| { |
| #ifdef PC_SOLIB |
| char *so_name = PC_SOLIB (loc->address); |
| #else |
| char *so_name = solib_address (loc->address); |
| #endif |
| if (so_name && !strcmp (so_name, solib->so_name)) |
| { |
| loc->shlib_disabled = 1; |
| /* At this point, we cannot rely on remove_breakpoint |
| succeeding so we must mark the breakpoint as not inserted |
| to prevent future errors occurring in remove_breakpoints. */ |
| loc->inserted = 0; |
| if (!disabled_shlib_breaks) |
| { |
| target_terminal_ours_for_output (); |
| warning (_("Temporarily disabling breakpoints for unloaded shared library \"%s\""), |
| so_name); |
| } |
| disabled_shlib_breaks = 1; |
| } |
| } |
| } |
| } |
| |
| /* FORK & VFORK catchpoints. */ |
| |
| /* Implement the "insert" breakpoint_ops method for fork catchpoints. */ |
| |
| static void |
| insert_catch_fork (struct breakpoint *b) |
| { |
| target_insert_fork_catchpoint (PIDGET (inferior_ptid)); |
| } |
| |
| /* Implement the "remove" breakpoint_ops method for fork catchpoints. */ |
| |
| static int |
| remove_catch_fork (struct breakpoint *b) |
| { |
| return target_remove_fork_catchpoint (PIDGET (inferior_ptid)); |
| } |
| |
| /* Implement the "breakpoint_hit" breakpoint_ops method for fork |
| catchpoints. */ |
| |
| static int |
| breakpoint_hit_catch_fork (struct breakpoint *b) |
| { |
| return inferior_has_forked (inferior_ptid, &b->forked_inferior_pid); |
| } |
| |
| /* Implement the "print_it" breakpoint_ops method for fork catchpoints. */ |
| |
| static enum print_stop_action |
| print_it_catch_fork (struct breakpoint *b) |
| { |
| annotate_catchpoint (b->number); |
| printf_filtered (_("\nCatchpoint %d (forked process %d), "), |
| b->number, ptid_get_pid (b->forked_inferior_pid)); |
| return PRINT_SRC_AND_LOC; |
| } |
| |
| /* Implement the "print_one" breakpoint_ops method for fork catchpoints. */ |
| |
| static void |
| print_one_catch_fork (struct breakpoint *b, CORE_ADDR *last_addr) |
| { |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (opts.addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| ui_out_text (uiout, "fork"); |
| if (!ptid_equal (b->forked_inferior_pid, null_ptid)) |
| { |
| ui_out_text (uiout, ", process "); |
| ui_out_field_int (uiout, "what", |
| ptid_get_pid (b->forked_inferior_pid)); |
| ui_out_spaces (uiout, 1); |
| } |
| } |
| |
| /* Implement the "print_mention" breakpoint_ops method for fork |
| catchpoints. */ |
| |
| static void |
| print_mention_catch_fork (struct breakpoint *b) |
| { |
| printf_filtered (_("Catchpoint %d (fork)"), b->number); |
| } |
| |
| /* The breakpoint_ops structure to be used in fork catchpoints. */ |
| |
| static struct breakpoint_ops catch_fork_breakpoint_ops = |
| { |
| insert_catch_fork, |
| remove_catch_fork, |
| breakpoint_hit_catch_fork, |
| print_it_catch_fork, |
| print_one_catch_fork, |
| print_mention_catch_fork |
| }; |
| |
| /* Implement the "insert" breakpoint_ops method for vfork catchpoints. */ |
| |
| static void |
| insert_catch_vfork (struct breakpoint *b) |
| { |
| target_insert_vfork_catchpoint (PIDGET (inferior_ptid)); |
| } |
| |
| /* Implement the "remove" breakpoint_ops method for vfork catchpoints. */ |
| |
| static int |
| remove_catch_vfork (struct breakpoint *b) |
| { |
| return target_remove_vfork_catchpoint (PIDGET (inferior_ptid)); |
| } |
| |
| /* Implement the "breakpoint_hit" breakpoint_ops method for vfork |
| catchpoints. */ |
| |
| static int |
| breakpoint_hit_catch_vfork (struct breakpoint *b) |
| { |
| return inferior_has_vforked (inferior_ptid, &b->forked_inferior_pid); |
| } |
| |
| /* Implement the "print_it" breakpoint_ops method for vfork catchpoints. */ |
| |
| static enum print_stop_action |
| print_it_catch_vfork (struct breakpoint *b) |
| { |
| annotate_catchpoint (b->number); |
| printf_filtered (_("\nCatchpoint %d (vforked process %d), "), |
| b->number, ptid_get_pid (b->forked_inferior_pid)); |
| return PRINT_SRC_AND_LOC; |
| } |
| |
| /* Implement the "print_one" breakpoint_ops method for vfork catchpoints. */ |
| |
| static void |
| print_one_catch_vfork (struct breakpoint *b, CORE_ADDR *last_addr) |
| { |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (opts.addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| ui_out_text (uiout, "vfork"); |
| if (!ptid_equal (b->forked_inferior_pid, null_ptid)) |
| { |
| ui_out_text (uiout, ", process "); |
| ui_out_field_int (uiout, "what", |
| ptid_get_pid (b->forked_inferior_pid)); |
| ui_out_spaces (uiout, 1); |
| } |
| } |
| |
| /* Implement the "print_mention" breakpoint_ops method for vfork |
| catchpoints. */ |
| |
| static void |
| print_mention_catch_vfork (struct breakpoint *b) |
| { |
| printf_filtered (_("Catchpoint %d (vfork)"), b->number); |
| } |
| |
| /* The breakpoint_ops structure to be used in vfork catchpoints. */ |
| |
| static struct breakpoint_ops catch_vfork_breakpoint_ops = |
| { |
| insert_catch_vfork, |
| remove_catch_vfork, |
| breakpoint_hit_catch_vfork, |
| print_it_catch_vfork, |
| print_one_catch_vfork, |
| print_mention_catch_vfork |
| }; |
| |
| /* Create a new breakpoint of the bp_catchpoint kind and return it. |
| |
| If TEMPFLAG is non-zero, then make the breakpoint temporary. |
| If COND_STRING is not NULL, then store it in the breakpoint. |
| OPS, if not NULL, is the breakpoint_ops structure associated |
| to the catchpoint. */ |
| |
| static struct breakpoint * |
| create_catchpoint (int tempflag, char *cond_string, |
| struct breakpoint_ops *ops) |
| { |
| struct symtab_and_line sal; |
| struct breakpoint *b; |
| |
| init_sal (&sal); |
| sal.pc = 0; |
| sal.symtab = NULL; |
| sal.line = 0; |
| |
| b = set_raw_breakpoint (sal, bp_catchpoint); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| |
| b->cond_string = (cond_string == NULL) ? |
| NULL : savestring (cond_string, strlen (cond_string)); |
| b->thread = -1; |
| b->addr_string = NULL; |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| b->ops = ops; |
| |
| mention (b); |
| update_global_location_list (1); |
| |
| return b; |
| } |
| |
| static void |
| create_fork_vfork_event_catchpoint (int tempflag, char *cond_string, |
| struct breakpoint_ops *ops) |
| { |
| struct breakpoint *b = create_catchpoint (tempflag, cond_string, ops); |
| |
| /* FIXME: We should put this information in a breakpoint private data |
| area. */ |
| b->forked_inferior_pid = null_ptid; |
| } |
| |
| /* Exec catchpoints. */ |
| |
| static void |
| insert_catch_exec (struct breakpoint *b) |
| { |
| target_insert_exec_catchpoint (PIDGET (inferior_ptid)); |
| } |
| |
| static int |
| remove_catch_exec (struct breakpoint *b) |
| { |
| return target_remove_exec_catchpoint (PIDGET (inferior_ptid)); |
| } |
| |
| static int |
| breakpoint_hit_catch_exec (struct breakpoint *b) |
| { |
| return inferior_has_execd (inferior_ptid, &b->exec_pathname); |
| } |
| |
| static enum print_stop_action |
| print_it_catch_exec (struct breakpoint *b) |
| { |
| annotate_catchpoint (b->number); |
| printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b->number, |
| b->exec_pathname); |
| return PRINT_SRC_AND_LOC; |
| } |
| |
| static void |
| print_one_catch_exec (struct breakpoint *b, CORE_ADDR *last_addr) |
| { |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| |
| /* Field 4, the address, is omitted (which makes the columns |
| not line up too nicely with the headers, but the effect |
| is relatively readable). */ |
| if (opts.addressprint) |
| ui_out_field_skip (uiout, "addr"); |
| annotate_field (5); |
| ui_out_text (uiout, "exec"); |
| if (b->exec_pathname != NULL) |
| { |
| ui_out_text (uiout, ", program \""); |
| ui_out_field_string (uiout, "what", b->exec_pathname); |
| ui_out_text (uiout, "\" "); |
| } |
| } |
| |
| static void |
| print_mention_catch_exec (struct breakpoint *b) |
| { |
| printf_filtered (_("Catchpoint %d (exec)"), b->number); |
| } |
| |
| static struct breakpoint_ops catch_exec_breakpoint_ops = |
| { |
| insert_catch_exec, |
| remove_catch_exec, |
| breakpoint_hit_catch_exec, |
| print_it_catch_exec, |
| print_one_catch_exec, |
| print_mention_catch_exec |
| }; |
| |
| static int |
| hw_breakpoint_used_count (void) |
| { |
| struct breakpoint *b; |
| int i = 0; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type == bp_hardware_breakpoint && breakpoint_enabled (b)) |
| i++; |
| } |
| |
| return i; |
| } |
| |
| static int |
| hw_watchpoint_used_count (enum bptype type, int *other_type_used) |
| { |
| struct breakpoint *b; |
| int i = 0; |
| |
| *other_type_used = 0; |
| ALL_BREAKPOINTS (b) |
| { |
| if (breakpoint_enabled (b)) |
| { |
| if (b->type == type) |
| i++; |
| else if ((b->type == bp_hardware_watchpoint || |
| b->type == bp_read_watchpoint || |
| b->type == bp_access_watchpoint)) |
| *other_type_used = 1; |
| } |
| } |
| return i; |
| } |
| |
| void |
| disable_watchpoints_before_interactive_call_start (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (((b->type == bp_watchpoint) |
| || (b->type == bp_hardware_watchpoint) |
| || (b->type == bp_read_watchpoint) |
| || (b->type == bp_access_watchpoint)) |
| && breakpoint_enabled (b)) |
| { |
| b->enable_state = bp_call_disabled; |
| update_global_location_list (0); |
| } |
| } |
| } |
| |
| void |
| enable_watchpoints_after_interactive_call_stop (void) |
| { |
| struct breakpoint *b; |
| |
| ALL_BREAKPOINTS (b) |
| { |
| if (((b->type == bp_watchpoint) |
| || (b->type == bp_hardware_watchpoint) |
| || (b->type == bp_read_watchpoint) |
| || (b->type == bp_access_watchpoint)) |
| && (b->enable_state == bp_call_disabled)) |
| { |
| b->enable_state = bp_enabled; |
| update_global_location_list (1); |
| } |
| } |
| } |
| |
| |
| /* Set a breakpoint that will evaporate an end of command |
| at address specified by SAL. |
| Restrict it to frame FRAME if FRAME is nonzero. */ |
| |
| struct breakpoint * |
| set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id, |
| enum bptype type) |
| { |
| struct breakpoint *b; |
| b = set_raw_breakpoint (sal, type); |
| b->enable_state = bp_enabled; |
| b->disposition = disp_donttouch; |
| b->frame_id = frame_id; |
| |
| /* If we're debugging a multi-threaded program, then we |
| want momentary breakpoints to be active in only a |
| single thread of control. */ |
| if (in_thread_list (inferior_ptid)) |
| b->thread = pid_to_thread_id (inferior_ptid); |
| |
| update_global_location_list_nothrow (1); |
| |
| return b; |
| } |
| |
| struct breakpoint * |
| set_momentary_breakpoint_at_pc (CORE_ADDR pc, enum bptype type) |
| { |
| struct symtab_and_line sal; |
| |
| sal = find_pc_line (pc, 0); |
| sal.pc = pc; |
| sal.section = find_pc_overlay (pc); |
| sal.explicit_pc = 1; |
| |
| return set_momentary_breakpoint (sal, null_frame_id, type); |
| } |
| |
| |
| /* Tell the user we have just set a breakpoint B. */ |
| |
| static void |
| mention (struct breakpoint *b) |
| { |
| int say_where = 0; |
| struct cleanup *old_chain, *ui_out_chain; |
| struct ui_stream *stb; |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| /* FIXME: This is misplaced; mention() is called by things (like |
| hitting a watchpoint) other than breakpoint creation. It should |
| be possible to clean this up and at the same time replace the |
| random calls to breakpoint_changed with this hook. */ |
| observer_notify_breakpoint_created (b->number); |
| |
| if (b->ops != NULL && b->ops->print_mention != NULL) |
| b->ops->print_mention (b); |
| else |
| switch (b->type) |
| { |
| case bp_none: |
| printf_filtered (_("(apparently deleted?) Eventpoint %d: "), b->number); |
| break; |
| case bp_watchpoint: |
| ui_out_text (uiout, "Watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_hardware_watchpoint: |
| ui_out_text (uiout, "Hardware watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_read_watchpoint: |
| ui_out_text (uiout, "Hardware read watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_access_watchpoint: |
| ui_out_text (uiout, "Hardware access (read/write) watchpoint "); |
| ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt"); |
| ui_out_field_int (uiout, "number", b->number); |
| ui_out_text (uiout, ": "); |
| print_expression (b->exp, stb->stream); |
| ui_out_field_stream (uiout, "exp", stb); |
| do_cleanups (ui_out_chain); |
| break; |
| case bp_breakpoint: |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| say_where = 0; |
| break; |
| } |
| if (b->disposition == disp_del) |
| printf_filtered (_("Temporary breakpoint")); |
| else |
| printf_filtered (_("Breakpoint")); |
| printf_filtered (_(" %d"), b->number); |
| say_where = 1; |
| break; |
| case bp_hardware_breakpoint: |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| say_where = 0; |
| break; |
| } |
| printf_filtered (_("Hardware assisted breakpoint %d"), b->number); |
| say_where = 1; |
| break; |
| |
| case bp_until: |
| case bp_finish: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| case bp_step_resume: |
| case bp_call_dummy: |
| case bp_watchpoint_scope: |
| case bp_shlib_event: |
| case bp_thread_event: |
| case bp_overlay_event: |
| break; |
| } |
| |
| if (say_where) |
| { |
| /* i18n: cagney/2005-02-11: Below needs to be merged into a |
| single string. */ |
| if (b->loc == NULL) |
| { |
| printf_filtered (_(" (%s) pending."), b->addr_string); |
| } |
| else |
| { |
| if (opts.addressprint || b->source_file == NULL) |
| { |
| printf_filtered (" at "); |
| fputs_filtered (paddress (b->loc->address), gdb_stdout); |
| } |
| if (b->source_file) |
| printf_filtered (": file %s, line %d.", |
| b->source_file, b->line_number); |
| |
| if (b->loc->next) |
| { |
| struct bp_location *loc = b->loc; |
| int n = 0; |
| for (; loc; loc = loc->next) |
| ++n; |
| printf_filtered (" (%d locations)", n); |
| } |
| |
| } |
| } |
| do_cleanups (old_chain); |
| if (ui_out_is_mi_like_p (uiout)) |
| return; |
| printf_filtered ("\n"); |
| } |
| |
| |
| static struct bp_location * |
| add_location_to_breakpoint (struct breakpoint *b, |
| const struct symtab_and_line *sal) |
| { |
| struct bp_location *loc, **tmp; |
| |
| loc = allocate_bp_location (b); |
| for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next)) |
| ; |
| *tmp = loc; |
| loc->requested_address = sal->pc; |
| loc->address = adjust_breakpoint_address (loc->requested_address, b->type); |
| loc->section = sal->section; |
| |
| set_breakpoint_location_function (loc); |
| return loc; |
| } |
| |
| |
| /* Return 1 if LOC is pointing to a permanent breakpoint, |
| return 0 otherwise. */ |
| |
| static int |
| bp_loc_is_permanent (struct bp_location *loc) |
| { |
| int len; |
| CORE_ADDR addr; |
| const gdb_byte *brk; |
| gdb_byte *target_mem; |
| struct cleanup *cleanup; |
| int retval = 0; |
| |
| gdb_assert (loc != NULL); |
| |
| addr = loc->address; |
| brk = gdbarch_breakpoint_from_pc (current_gdbarch, &addr, &len); |
| |
| /* Software breakpoints unsupported? */ |
| if (brk == NULL) |
| return 0; |
| |
| target_mem = alloca (len); |
| |
| /* Enable the automatic memory restoration from breakpoints while |
| we read the memory. Otherwise we could say about our temporary |
| breakpoints they are permanent. */ |
| cleanup = make_show_memory_breakpoints_cleanup (0); |
| |
| if (target_read_memory (loc->address, target_mem, len) == 0 |
| && memcmp (target_mem, brk, len) == 0) |
| retval = 1; |
| |
| do_cleanups (cleanup); |
| |
| return retval; |
| } |
| |
| |
| |
| /* Create a breakpoint with SAL as location. Use ADDR_STRING |
| as textual description of the location, and COND_STRING |
| as condition expression. */ |
| |
| static void |
| create_breakpoint (struct symtabs_and_lines sals, char *addr_string, |
| char *cond_string, |
| enum bptype type, enum bpdisp disposition, |
| int thread, int ignore_count, |
| struct breakpoint_ops *ops, int from_tty, int enabled) |
| { |
| struct breakpoint *b = NULL; |
| int i; |
| |
| if (type == bp_hardware_breakpoint) |
| { |
| int i = hw_breakpoint_used_count (); |
| int target_resources_ok = |
| TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint, |
| i + 1, 0); |
| if (target_resources_ok == 0) |
| error (_("No hardware breakpoint support in the target.")); |
| else if (target_resources_ok < 0) |
| error (_("Hardware breakpoints used exceeds limit.")); |
| } |
| |
| for (i = 0; i < sals.nelts; ++i) |
| { |
| struct symtab_and_line sal = sals.sals[i]; |
| struct bp_location *loc; |
| |
| if (from_tty) |
| describe_other_breakpoints (sal.pc, sal.section, thread); |
| |
| if (i == 0) |
| { |
| b = set_raw_breakpoint (sal, type); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->thread = thread; |
| |
| b->cond_string = cond_string; |
| b->ignore_count = ignore_count; |
| b->enable_state = enabled ? bp_enabled : bp_disabled; |
| b->disposition = disposition; |
| |
| loc = b->loc; |
| } |
| else |
| { |
| loc = add_location_to_breakpoint (b, &sal); |
| } |
| |
| if (bp_loc_is_permanent (loc)) |
| make_breakpoint_permanent (b); |
| |
| if (b->cond_string) |
| { |
| char *arg = b->cond_string; |
| loc->cond = parse_exp_1 (&arg, block_for_pc (loc->address), 0); |
| if (*arg) |
| error (_("Garbage %s follows condition"), arg); |
| } |
| } |
| |
| if (addr_string) |
| b->addr_string = addr_string; |
| else |
| /* addr_string has to be used or breakpoint_re_set will delete |
| me. */ |
| b->addr_string = xstrprintf ("*0x%s", paddr (b->loc->address)); |
| |
| b->ops = ops; |
| mention (b); |
| } |
| |
| /* Remove element at INDEX_TO_REMOVE from SAL, shifting other |
| elements to fill the void space. */ |
| static void remove_sal (struct symtabs_and_lines *sal, int index_to_remove) |
| { |
| int i = index_to_remove+1; |
| int last_index = sal->nelts-1; |
| |
| for (;i <= last_index; ++i) |
| sal->sals[i-1] = sal->sals[i]; |
| |
| --(sal->nelts); |
| } |
| |
| /* If appropriate, obtains all sals that correspond |
| to the same file and line as SAL. This is done |
| only if SAL does not have explicit PC and has |
| line and file information. If we got just a single |
| expanded sal, return the original. |
| |
| Otherwise, if SAL.explicit_line is not set, filter out |
| all sals for which the name of enclosing function |
| is different from SAL. This makes sure that if we have |
| breakpoint originally set in template instantiation, say |
| foo<int>(), we won't expand SAL to locations at the same |
| line in all existing instantiations of 'foo'. |
| |
| */ |
| struct symtabs_and_lines |
| expand_line_sal_maybe (struct symtab_and_line sal) |
| { |
| struct symtabs_and_lines expanded; |
| CORE_ADDR original_pc = sal.pc; |
| char *original_function = NULL; |
| int found; |
| int i; |
| |
| /* If we have explicit pc, don't expand. |
| If we have no line number, we can't expand. */ |
| if (sal.explicit_pc || sal.line == 0 || sal.symtab == NULL) |
| { |
| expanded.nelts = 1; |
| expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| expanded.sals[0] = sal; |
| return expanded; |
| } |
| |
| sal.pc = 0; |
| find_pc_partial_function (original_pc, &original_function, NULL, NULL); |
| |
| expanded = expand_line_sal (sal); |
| if (expanded.nelts == 1) |
| { |
| /* We had one sal, we got one sal. Without futher |
| processing, just return the original sal. */ |
| xfree (expanded.sals); |
| expanded.nelts = 1; |
| expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| sal.pc = original_pc; |
| expanded.sals[0] = sal; |
| return expanded; |
| } |
| |
| if (!sal.explicit_line) |
| { |
| CORE_ADDR func_addr, func_end; |
| for (i = 0; i < expanded.nelts; ++i) |
| { |
| CORE_ADDR pc = expanded.sals[i].pc; |
| char *this_function; |
| if (find_pc_partial_function (pc, &this_function, |
| &func_addr, &func_end)) |
| { |
| if (this_function && |
| strcmp (this_function, original_function) != 0) |
| { |
| remove_sal (&expanded, i); |
| --i; |
| } |
| else if (func_addr == pc) |
| { |
| /* We're at beginning of a function, and should |
| skip prologue. */ |
| struct symbol *sym = find_pc_function (pc); |
| if (sym) |
| expanded.sals[i] = find_function_start_sal (sym, 1); |
| else |
| expanded.sals[i].pc |
| = gdbarch_skip_prologue (current_gdbarch, pc); |
| } |
| } |
| } |
| } |
| |
| |
| if (expanded.nelts <= 1) |
| { |
| /* This is un ugly workaround. If we get zero |
| expanded sals then something is really wrong. |
| Fix that by returnign the original sal. */ |
| xfree (expanded.sals); |
| expanded.nelts = 1; |
| expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| sal.pc = original_pc; |
| expanded.sals[0] = sal; |
| return expanded; |
| } |
| |
| if (original_pc) |
| { |
| found = 0; |
| for (i = 0; i < expanded.nelts; ++i) |
| if (expanded.sals[i].pc == original_pc) |
| { |
| found = 1; |
| break; |
| } |
| gdb_assert (found); |
| } |
| |
| return expanded; |
| } |
| |
| /* Add SALS.nelts breakpoints to the breakpoint table. For each |
| SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i] |
| value. COND_STRING, if not NULL, specified the condition to be |
| used for all breakpoints. Essentially the only case where |
| SALS.nelts is not 1 is when we set a breakpoint on an overloaded |
| function. In that case, it's still not possible to specify |
| separate conditions for different overloaded functions, so |
| we take just a single condition string. |
| |
| NOTE: If the function succeeds, the caller is expected to cleanup |
| the arrays ADDR_STRING, COND_STRING, and SALS (but not the |
| array contents). If the function fails (error() is called), the |
| caller is expected to cleanups both the ADDR_STRING, COND_STRING, |
| COND and SALS arrays and each of those arrays contents. */ |
| |
| static void |
| create_breakpoints (struct symtabs_and_lines sals, char **addr_string, |
| char *cond_string, |
| enum bptype type, enum bpdisp disposition, |
| int thread, int ignore_count, |
| struct breakpoint_ops *ops, int from_tty, |
| int enabled) |
| { |
| int i; |
| for (i = 0; i < sals.nelts; ++i) |
| { |
| struct symtabs_and_lines expanded = |
| expand_line_sal_maybe (sals.sals[i]); |
| |
| create_breakpoint (expanded, addr_string[i], |
| cond_string, type, disposition, |
| thread, ignore_count, ops, from_tty, enabled); |
| } |
| |
| update_global_location_list (1); |
| } |
| |
| /* Parse ARG which is assumed to be a SAL specification possibly |
| followed by conditionals. On return, SALS contains an array of SAL |
| addresses found. ADDR_STRING contains a vector of (canonical) |
| address strings. ARG points to the end of the SAL. */ |
| |
| static void |
| parse_breakpoint_sals (char **address, |
| struct symtabs_and_lines *sals, |
| char ***addr_string, |
| int *not_found_ptr) |
| { |
| char *addr_start = *address; |
| *addr_string = NULL; |
| /* If no arg given, or if first arg is 'if ', use the default |
| breakpoint. */ |
| if ((*address) == NULL |
| || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2]))) |
| { |
| if (default_breakpoint_valid) |
| { |
| struct symtab_and_line sal; |
| init_sal (&sal); /* initialize to zeroes */ |
| sals->sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| sal.pc = default_breakpoint_address; |
| sal.line = default_breakpoint_line; |
| sal.symtab = default_breakpoint_symtab; |
| sal.section = find_pc_overlay (sal.pc); |
| sals->sals[0] = sal; |
| sals->nelts = 1; |
| } |
| else |
| error (_("No default breakpoint address now.")); |
| } |
| else |
| { |
| /* Force almost all breakpoints to be in terms of the |
| current_source_symtab (which is decode_line_1's default). This |
| should produce the results we want almost all of the time while |
| leaving default_breakpoint_* alone. |
| ObjC: However, don't match an Objective-C method name which |
| may have a '+' or '-' succeeded by a '[' */ |
| |
| struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| |
| if (default_breakpoint_valid |
| && (!cursal.symtab |
| || ((strchr ("+-", (*address)[0]) != NULL) |
| && ((*address)[1] != '[')))) |
| *sals = decode_line_1 (address, 1, default_breakpoint_symtab, |
| default_breakpoint_line, addr_string, |
| not_found_ptr); |
| else |
| *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, |
| addr_string, not_found_ptr); |
| } |
| /* For any SAL that didn't have a canonical string, fill one in. */ |
| if (sals->nelts > 0 && *addr_string == NULL) |
| *addr_string = xcalloc (sals->nelts, sizeof (char **)); |
| if (addr_start != (*address)) |
| { |
| int i; |
| for (i = 0; i < sals->nelts; i++) |
| { |
| /* Add the string if not present. */ |
| if ((*addr_string)[i] == NULL) |
| (*addr_string)[i] = savestring (addr_start, (*address) - addr_start); |
| } |
| } |
| } |
| |
| |
| /* Convert each SAL into a real PC. Verify that the PC can be |
| inserted as a breakpoint. If it can't throw an error. */ |
| |
| static void |
| breakpoint_sals_to_pc (struct symtabs_and_lines *sals, |
| char *address) |
| { |
| int i; |
| for (i = 0; i < sals->nelts; i++) |
| resolve_sal_pc (&sals->sals[i]); |
| } |
| |
| static void |
| do_captured_parse_breakpoint (struct ui_out *ui, void *data) |
| { |
| struct captured_parse_breakpoint_args *args = data; |
| |
| parse_breakpoint_sals (args->arg_p, args->sals_p, args->addr_string_p, |
| args->not_found_ptr); |
| } |
| |
| /* Given TOK, a string specification of condition and thread, as |
| accepted by the 'break' command, extract the condition |
| string and thread number and set *COND_STRING and *THREAD. |
| PC identifies the context at which the condition should be parsed. |
| If no condition is found, *COND_STRING is set to NULL. |
| If no thread is found, *THREAD is set to -1. */ |
| static void |
| find_condition_and_thread (char *tok, CORE_ADDR pc, |
| char **cond_string, int *thread) |
| { |
| *cond_string = NULL; |
| *thread = -1; |
| while (tok && *tok) |
| { |
| char *end_tok; |
| int toklen; |
| char *cond_start = NULL; |
| char *cond_end = NULL; |
| while (*tok == ' ' || *tok == '\t') |
| tok++; |
| |
| end_tok = tok; |
| |
| while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') |
| end_tok++; |
| |
| toklen = end_tok - tok; |
| |
| if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| { |
| struct expression *expr; |
| |
| tok = cond_start = end_tok + 1; |
| expr = parse_exp_1 (&tok, block_for_pc (pc), 0); |
| xfree (expr); |
| cond_end = tok; |
| *cond_string = savestring (cond_start, |
| cond_end - cond_start); |
| } |
| else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) |
| { |
| char *tmptok; |
| |
| tok = end_tok + 1; |
| tmptok = tok; |
| *thread = strtol (tok, &tok, 0); |
| if (tok == tmptok) |
| error (_("Junk after thread keyword.")); |
| if (!valid_thread_id (*thread)) |
| error (_("Unknown thread %d."), *thread); |
| } |
| else |
| error (_("Junk at end of arguments.")); |
| } |
| } |
| |
| /* Set a breakpoint. This function is shared between |
| CLI and MI functions for setting a breakpoint. |
| This function has two major modes of operations, |
| selected by the PARSE_CONDITION_AND_THREAD parameter. |
| If non-zero, the function will parse arg, extracting |
| breakpoint location, address and thread. Otherwise, |
| ARG is just the location of breakpoint, with condition |
| and thread specified by the COND_STRING and THREAD |
| parameters. */ |
| |
| static void |
| break_command_really (char *arg, char *cond_string, int thread, |
| int parse_condition_and_thread, |
| int tempflag, int hardwareflag, |
| int ignore_count, |
| enum auto_boolean pending_break_support, |
| struct breakpoint_ops *ops, |
| int from_tty, |
| int enabled) |
| { |
| struct gdb_exception e; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line pending_sal; |
| char *copy_arg; |
| char *err_msg; |
| char *addr_start = arg; |
| char **addr_string; |
| struct cleanup *old_chain; |
| struct cleanup *breakpoint_chain = NULL; |
| struct captured_parse_breakpoint_args parse_args; |
| int i; |
| int pending = 0; |
| int not_found = 0; |
| |
| sals.sals = NULL; |
| sals.nelts = 0; |
| addr_string = NULL; |
| |
| parse_args.arg_p = &arg; |
| parse_args.sals_p = &sals; |
| parse_args.addr_string_p = &addr_string; |
| parse_args.not_found_ptr = ¬_found; |
| |
| e = catch_exception (uiout, do_captured_parse_breakpoint, |
| &parse_args, RETURN_MASK_ALL); |
| |
| /* If caller is interested in rc value from parse, set value. */ |
| switch (e.reason) |
| { |
| case RETURN_QUIT: |
| throw_exception (e); |
| case RETURN_ERROR: |
| switch (e.error) |
| { |
| case NOT_FOUND_ERROR: |
| |
| /* If pending breakpoint support is turned off, throw |
| error. */ |
| |
| if (pending_break_support == AUTO_BOOLEAN_FALSE) |
| throw_exception (e); |
| |
| exception_print (gdb_stderr, e); |
| |
| /* If pending breakpoint support is auto query and the user |
| selects no, then simply return the error code. */ |
| if (pending_break_support == AUTO_BOOLEAN_AUTO && |
| !nquery ("Make breakpoint pending on future shared library load? ")) |
| return; |
| |
| /* At this point, either the user was queried about setting |
| a pending breakpoint and selected yes, or pending |
| breakpoint behavior is on and thus a pending breakpoint |
| is defaulted on behalf of the user. */ |
| copy_arg = xstrdup (addr_start); |
| addr_string = ©_arg; |
| sals.nelts = 1; |
| sals.sals = &pending_sal; |
| pending_sal.pc = 0; |
| pending = 1; |
| break; |
| default: |
| throw_exception (e); |
| } |
| default: |
| if (!sals.nelts) |
| return; |
| } |
| |
| /* Create a chain of things that always need to be cleaned up. */ |
| old_chain = make_cleanup (null_cleanup, 0); |
| |
| if (!pending) |
| { |
| /* Make sure that all storage allocated to SALS gets freed. */ |
| make_cleanup (xfree, sals.sals); |
| |
| /* Cleanup the addr_string array but not its contents. */ |
| make_cleanup (xfree, addr_string); |
| } |
| |
| /* ----------------------------- SNIP ----------------------------- |
| Anything added to the cleanup chain beyond this point is assumed |
| to be part of a breakpoint. If the breakpoint create succeeds |
| then the memory is not reclaimed. */ |
| breakpoint_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Mark the contents of the addr_string for cleanup. These go on |
| the breakpoint_chain and only occure if the breakpoint create |
| fails. */ |
| for (i = 0; i < sals.nelts; i++) |
| { |
| if (addr_string[i] != NULL) |
| make_cleanup (xfree, addr_string[i]); |
| } |
| |
| /* Resolve all line numbers to PC's and verify that the addresses |
| are ok for the target. */ |
| if (!pending) |
| breakpoint_sals_to_pc (&sals, addr_start); |
| |
| /* Verify that condition can be parsed, before setting any |
| breakpoints. Allocate a separate condition expression for each |
| breakpoint. */ |
| if (!pending) |
| { |
| if (parse_condition_and_thread) |
| { |
| /* Here we only parse 'arg' to separate condition |
| from thread number, so parsing in context of first |
| sal is OK. When setting the breakpoint we'll |
| re-parse it in context of each sal. */ |
| cond_string = NULL; |
| thread = -1; |
| find_condition_and_thread (arg, sals.sals[0].pc, &cond_string, &thread); |
| if (cond_string) |
| make_cleanup (xfree, cond_string); |
| } |
| else |
| { |
| /* Create a private copy of condition string. */ |
| if (cond_string) |
| { |
| cond_string = xstrdup (cond_string); |
| make_cleanup (xfree, cond_string); |
| } |
| } |
| create_breakpoints (sals, addr_string, cond_string, |
| hardwareflag ? bp_hardware_breakpoint |
| : bp_breakpoint, |
| tempflag ? disp_del : disp_donttouch, |
| thread, ignore_count, ops, from_tty, enabled); |
| } |
| else |
| { |
| struct symtab_and_line sal = {0}; |
| struct breakpoint *b; |
| |
| make_cleanup (xfree, copy_arg); |
| |
| b = set_raw_breakpoint_without_location (hardwareflag |
| ? bp_hardware_breakpoint |
| : bp_breakpoint); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->thread = -1; |
| b->addr_string = addr_string[0]; |
| b->cond_string = NULL; |
| b->ignore_count = ignore_count; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| b->condition_not_parsed = 1; |
| b->ops = ops; |
| b->enable_state = enabled ? bp_enabled : bp_disabled; |
| |
| update_global_location_list (1); |
| mention (b); |
| } |
| |
| if (sals.nelts > 1) |
| warning (_("Multiple breakpoints were set.\n" |
| "Use the \"delete\" command to delete unwanted breakpoints.")); |
| /* That's it. Discard the cleanups for data inserted into the |
| breakpoint. */ |
| discard_cleanups (breakpoint_chain); |
| /* But cleanup everything else. */ |
| do_cleanups (old_chain); |
| } |
| |
| /* Set a breakpoint. |
| ARG is a string describing breakpoint address, |
| condition, and thread. |
| FLAG specifies if a breakpoint is hardware on, |
| and if breakpoint is temporary, using BP_HARDWARE_FLAG |
| and BP_TEMPFLAG. */ |
| |
| static void |
| break_command_1 (char *arg, int flag, int from_tty) |
| { |
| int hardwareflag = flag & BP_HARDWAREFLAG; |
| int tempflag = flag & BP_TEMPFLAG; |
| |
| break_command_really (arg, |
| NULL, 0, 1 /* parse arg */, |
| tempflag, hardwareflag, |
| 0 /* Ignore count */, |
| pending_break_support, |
| NULL /* breakpoint_ops */, |
| from_tty, |
| 1 /* enabled */); |
| } |
| |
| |
| void |
| set_breakpoint (char *address, char *condition, |
| int hardwareflag, int tempflag, |
| int thread, int ignore_count, |
| int pending, int enabled) |
| { |
| break_command_really (address, condition, thread, |
| 0 /* condition and thread are valid. */, |
| tempflag, hardwareflag, |
| ignore_count, |
| pending |
| ? AUTO_BOOLEAN_TRUE : AUTO_BOOLEAN_FALSE, |
| NULL, 0, enabled); |
| } |
| |
| /* Adjust SAL to the first instruction past the function prologue. |
| The end of the prologue is determined using the line table from |
| the debugging information. |
| |
| If SAL is already past the prologue, then do nothing. */ |
| |
| static void |
| skip_prologue_sal (struct symtab_and_line *sal) |
| { |
| struct symbol *sym = find_pc_function (sal->pc); |
| struct symtab_and_line start_sal; |
| |
| if (sym == NULL) |
| return; |
| |
| start_sal = find_function_start_sal (sym, 1); |
| if (sal->pc < start_sal.pc) |
| *sal = start_sal; |
| } |
| |
| /* Helper function for break_command_1 and disassemble_command. */ |
| |
| void |
| resolve_sal_pc (struct symtab_and_line *sal) |
| { |
| CORE_ADDR pc; |
| |
| if (sal->pc == 0 && sal->symtab != NULL) |
| { |
| if (!find_line_pc (sal->symtab, sal->line, &pc)) |
| error (_("No line %d in file \"%s\"."), |
| sal->line, sal->symtab->filename); |
| sal->pc = pc; |
| |
| /* If this SAL corresponds to a breakpoint inserted using |
| a line number, then skip the function prologue if necessary. */ |
| if (sal->explicit_line) |
| skip_prologue_sal (sal); |
| } |
| |
| if (sal->section == 0 && sal->symtab != NULL) |
| { |
| struct blockvector *bv; |
| struct block *b; |
| struct symbol *sym; |
| |
| bv = blockvector_for_pc_sect (sal->pc, 0, &b, sal->symtab); |
| if (bv != NULL) |
| { |
| sym = block_linkage_function (b); |
| if (sym != NULL) |
| { |
| fixup_symbol_section (sym, sal->symtab->objfile); |
| sal->section = SYMBOL_OBJ_SECTION (sym); |
| } |
| else |
| { |
| /* It really is worthwhile to have the section, so we'll just |
| have to look harder. This case can be executed if we have |
| line numbers but no functions (as can happen in assembly |
| source). */ |
| |
| struct minimal_symbol *msym; |
| |
| msym = lookup_minimal_symbol_by_pc (sal->pc); |
| if (msym) |
| sal->section = SYMBOL_OBJ_SECTION (msym); |
| } |
| } |
| } |
| } |
| |
| void |
| break_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| void |
| tbreak_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, BP_TEMPFLAG, from_tty); |
| } |
| |
| static void |
| hbreak_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, BP_HARDWAREFLAG, from_tty); |
| } |
| |
| static void |
| thbreak_command (char *arg, int from_tty) |
| { |
| break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); |
| } |
| |
| static void |
| stop_command (char *arg, int from_tty) |
| { |
| printf_filtered (_("Specify the type of breakpoint to set.\n\ |
| Usage: stop in <function | address>\n\ |
| stop at <line>\n")); |
| } |
| |
| static void |
| stopin_command (char *arg, int from_tty) |
| { |
| int badInput = 0; |
| |
| if (arg == (char *) NULL) |
| badInput = 1; |
| else if (*arg != '*') |
| { |
| char *argptr = arg; |
| int hasColon = 0; |
| |
| /* look for a ':'. If this is a line number specification, then |
| say it is bad, otherwise, it should be an address or |
| function/method name */ |
| while (*argptr && !hasColon) |
| { |
| hasColon = (*argptr == ':'); |
| argptr++; |
| } |
| |
| if (hasColon) |
| badInput = (*argptr != ':'); /* Not a class::method */ |
| else |
| badInput = isdigit (*arg); /* a simple line number */ |
| } |
| |
| if (badInput) |
| printf_filtered (_("Usage: stop in <function | address>\n")); |
| else |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| static void |
| stopat_command (char *arg, int from_tty) |
| { |
| int badInput = 0; |
| |
| if (arg == (char *) NULL || *arg == '*') /* no line number */ |
| badInput = 1; |
| else |
| { |
| char *argptr = arg; |
| int hasColon = 0; |
| |
| /* look for a ':'. If there is a '::' then get out, otherwise |
| it is probably a line number. */ |
| while (*argptr && !hasColon) |
| { |
| hasColon = (*argptr == ':'); |
| argptr++; |
| } |
| |
| if (hasColon) |
| badInput = (*argptr == ':'); /* we have class::method */ |
| else |
| badInput = !isdigit (*arg); /* not a line number */ |
| } |
| |
| if (badInput) |
| printf_filtered (_("Usage: stop at <line>\n")); |
| else |
| break_command_1 (arg, 0, from_tty); |
| } |
| |
| /* accessflag: hw_write: watch write, |
| hw_read: watch read, |
| hw_access: watch access (read or write) */ |
| static void |
| watch_command_1 (char *arg, int accessflag, int from_tty) |
| { |
| struct breakpoint *b, *scope_breakpoint = NULL; |
| struct symtab_and_line sal; |
| struct expression *exp; |
| struct block *exp_valid_block; |
| struct value *val, *mark; |
| struct frame_info *frame; |
| struct frame_info *prev_frame = NULL; |
| char *exp_start = NULL; |
| char *exp_end = NULL; |
| char *tok, *id_tok_start, *end_tok; |
| int toklen; |
| char *cond_start = NULL; |
| char *cond_end = NULL; |
| struct expression *cond = NULL; |
| int i, other_type_used, target_resources_ok = 0; |
| enum bptype bp_type; |
| int mem_cnt = 0; |
| int thread = -1; |
| |
| init_sal (&sal); /* initialize to zeroes */ |
| |
| /* Make sure that we actually have parameters to parse. */ |
| if (arg != NULL && arg[0] != '\0') |
| { |
| toklen = strlen (arg); /* Size of argument list. */ |
| |
| /* Points tok to the end of the argument list. */ |
| tok = arg + toklen - 1; |
| |
| /* Go backwards in the parameters list. Skip the last parameter. |
| If we're expecting a 'thread <thread_num>' parameter, this should |
| be the thread identifier. */ |
| while (tok > arg && (*tok == ' ' || *tok == '\t')) |
| tok--; |
| while (tok > arg && (*tok != ' ' && *tok != '\t')) |
| tok--; |
| |
| /* Points end_tok to the beginning of the last token. */ |
| id_tok_start = tok + 1; |
| |
| /* Go backwards in the parameters list. Skip one more parameter. |
| If we're expecting a 'thread <thread_num>' parameter, we should |
| reach a "thread" token. */ |
| while (tok > arg && (*tok == ' ' || *tok == '\t')) |
| tok--; |
| |
| end_tok = tok; |
| |
| while (tok > arg && (*tok != ' ' && *tok != '\t')) |
| tok--; |
| |
| /* Move the pointer forward to skip the whitespace and |
| calculate the length of the token. */ |
| tok++; |
| toklen = end_tok - tok; |
| |
| if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) |
| { |
| /* At this point we've found a "thread" token, which means |
| the user is trying to set a watchpoint that triggers |
| only in a specific thread. */ |
| char *endp; |
| |
| /* Extract the thread ID from the next token. */ |
| thread = strtol (id_tok_start, &endp, 0); |
| |
| /* Check if the user provided a valid numeric value for the |
| thread ID. */ |
| if (*endp != ' ' && *endp != '\t' && *endp != '\0') |
| error (_("Invalid thread ID specification %s."), id_tok_start); |
| |
| /* Check if the thread actually exists. */ |
| if (!valid_thread_id (thread)) |
| error (_("Unknown thread %d."), thread); |
| |
| /* Truncate the string and get rid of the thread <thread_num> |
| parameter before the parameter list is parsed by the |
| evaluate_expression() function. */ |
| *tok = '\0'; |
| } |
| } |
| |
| /* Parse the rest of the arguments. */ |
| innermost_block = NULL; |
| exp_start = arg; |
| exp = parse_exp_1 (&arg, 0, 0); |
| exp_end = arg; |
| exp_valid_block = innermost_block; |
| mark = value_mark (); |
| fetch_watchpoint_value (exp, &val, NULL, NULL); |
| if (val != NULL) |
| release_value (val); |
| |
| tok = arg; |
| while (*tok == ' ' || *tok == '\t') |
| tok++; |
| end_tok = tok; |
| |
| while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000') |
| end_tok++; |
| |
| toklen = end_tok - tok; |
| if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| { |
| tok = cond_start = end_tok + 1; |
| cond = parse_exp_1 (&tok, 0, 0); |
| cond_end = tok; |
| } |
| if (*tok) |
| error (_("Junk at end of command.")); |
| |
| if (accessflag == hw_read) |
| bp_type = bp_read_watchpoint; |
| else if (accessflag == hw_access) |
| bp_type = bp_access_watchpoint; |
| else |
| bp_type = bp_hardware_watchpoint; |
| |
| mem_cnt = can_use_hardware_watchpoint (val); |
| if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint) |
| error (_("Expression cannot be implemented with read/access watchpoint.")); |
| if (mem_cnt != 0) |
| { |
| i = hw_watchpoint_used_count (bp_type, &other_type_used); |
| target_resources_ok = |
| TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt, |
| other_type_used); |
| if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint) |
| error (_("Target does not support this type of hardware watchpoint.")); |
| |
| if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint) |
| error (_("Target can only support one kind of HW watchpoint at a time.")); |
| } |
| |
| /* Change the type of breakpoint to an ordinary watchpoint if a hardware |
| watchpoint could not be set. */ |
| if (!mem_cnt || target_resources_ok <= 0) |
| bp_type = bp_watchpoint; |
| |
| frame = block_innermost_frame (exp_valid_block); |
| if (frame) |
| prev_frame = get_prev_frame (frame); |
| else |
| prev_frame = NULL; |
| |
| /* If the expression is "local", then set up a "watchpoint scope" |
| breakpoint at the point where we've left the scope of the watchpoint |
| expression. Create the scope breakpoint before the watchpoint, so |
| that we will encounter it first in bpstat_stop_status. */ |
| if (innermost_block && prev_frame) |
| { |
| scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame), |
| bp_watchpoint_scope); |
| |
| scope_breakpoint->enable_state = bp_enabled; |
| |
| /* Automatically delete the breakpoint when it hits. */ |
| scope_breakpoint->disposition = disp_del; |
| |
| /* Only break in the proper frame (help with recursion). */ |
| scope_breakpoint->frame_id = get_frame_id (prev_frame); |
| |
| /* Set the address at which we will stop. */ |
| scope_breakpoint->loc->requested_address |
| = get_frame_pc (prev_frame); |
| scope_breakpoint->loc->address |
| = adjust_breakpoint_address (scope_breakpoint->loc->requested_address, |
| scope_breakpoint->type); |
| } |
| |
| /* Now set up the breakpoint. */ |
| b = set_raw_breakpoint (sal, bp_type); |
| set_breakpoint_count (breakpoint_count + 1); |
| b->number = breakpoint_count; |
| b->thread = thread; |
| b->disposition = disp_donttouch; |
| b->exp = exp; |
| b->exp_valid_block = exp_valid_block; |
| b->exp_string = savestring (exp_start, exp_end - exp_start); |
| b->val = val; |
| b->val_valid = 1; |
| b->loc->cond = cond; |
| if (cond_start) |
| b->cond_string = savestring (cond_start, cond_end - cond_start); |
| else |
| b->cond_string = 0; |
| |
| if (frame) |
| b->watchpoint_frame = get_frame_id (frame); |
| else |
| b->watchpoint_frame = null_frame_id; |
| |
| if (scope_breakpoint != NULL) |
| { |
| /* The scope breakpoint is related to the watchpoint. We will |
| need to act on them together. */ |
| b->related_breakpoint = scope_breakpoint; |
| scope_breakpoint->related_breakpoint = b; |
| } |
| |
| value_free_to_mark (mark); |
| mention (b); |
| update_global_location_list (1); |
| } |
| |
| /* Return count of locations need to be watched and can be handled |
| in hardware. If the watchpoint can not be handled |
| in hardware return zero. */ |
| |
| static int |
| can_use_hardware_watchpoint (struct value *v) |
| { |
| int found_memory_cnt = 0; |
| struct value *head = v; |
| |
| /* Did the user specifically forbid us to use hardware watchpoints? */ |
| if (!can_use_hw_watchpoints) |
| return 0; |
| |
| /* Make sure that the value of the expression depends only upon |
| memory contents, and values computed from them within GDB. If we |
| find any register references or function calls, we can't use a |
| hardware watchpoint. |
| |
| The idea here is that evaluating an expression generates a series |
| of values, one holding the value of every subexpression. (The |
| expression a*b+c has five subexpressions: a, b, a*b, c, and |
| a*b+c.) GDB's values hold almost enough information to establish |
| the criteria given above --- they identify memory lvalues, |
| register lvalues, computed values, etcetera. So we can evaluate |
| the expression, and then scan the chain of values that leaves |
| behind to decide whether we can detect any possible change to the |
| expression's final value using only hardware watchpoints. |
| |
| However, I don't think that the values returned by inferior |
| function calls are special in any way. So this function may not |
| notice that an expression involving an inferior function call |
| can't be watched with hardware watchpoints. FIXME. */ |
| for (; v; v = value_next (v)) |
| { |
| if (VALUE_LVAL (v) == lval_memory) |
| { |
| if (value_lazy (v)) |
| /* A lazy memory lvalue is one that GDB never needed to fetch; |
| we either just used its address (e.g., `a' in `a.b') or |
| we never needed it at all (e.g., `a' in `a,b'). */ |
| ; |
| else |
| { |
| /* Ahh, memory we actually used! Check if we can cover |
| it with hardware watchpoints. */ |
| struct type *vtype = check_typedef (value_type (v)); |
| |
| /* We only watch structs and arrays if user asked for it |
| explicitly, never if they just happen to appear in a |
| middle of some value chain. */ |
| if (v == head |
| || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| { |
| CORE_ADDR vaddr = VALUE_ADDRESS (v) + value_offset (v); |
| int len = TYPE_LENGTH (value_type (v)); |
| |
| if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len)) |
| return 0; |
| else |
| found_memory_cnt++; |
| } |
| } |
| } |
| else if (VALUE_LVAL (v) != not_lval |
| && deprecated_value_modifiable (v) == 0) |
| return 0; /* ??? What does this represent? */ |
| else if (VALUE_LVAL (v) == lval_register) |
| return 0; /* cannot watch a register with a HW watchpoint */ |
| } |
| |
| /* The expression itself looks suitable for using a hardware |
| watchpoint, but give the target machine a chance to reject it. */ |
| return found_memory_cnt; |
| } |
| |
| void |
| watch_command_wrapper (char *arg, int from_tty) |
| { |
| watch_command (arg, from_tty); |
| } |
| |
| static void |
| watch_command (char *arg, int from_tty) |
| { |
| watch_command_1 (arg, hw_write, from_tty); |
| } |
| |
| void |
| rwatch_command_wrapper (char *arg, int from_tty) |
| { |
| rwatch_command (arg, from_tty); |
| } |
| |
| static void |
| rwatch_command (char *arg, int from_tty) |
| { |
| watch_command_1 (arg, hw_read, from_tty); |
| } |
| |
| void |
| awatch_command_wrapper (char *arg, int from_tty) |
| { |
| awatch_command (arg, from_tty); |
| } |
| |
| static void |
| awatch_command (char *arg, int from_tty) |
| { |
| watch_command_1 (arg, hw_access, from_tty); |
| } |
| |
| |
| /* Helper routines for the until_command routine in infcmd.c. Here |
| because it uses the mechanisms of breakpoints. */ |
| |
| struct until_break_command_continuation_args |
| { |
| struct breakpoint *breakpoint; |
| struct breakpoint *breakpoint2; |
| }; |
| |
| /* This function is called by fetch_inferior_event via the |
| cmd_continuation pointer, to complete the until command. It takes |
| care of cleaning up the temporary breakpoints set up by the until |
| command. */ |
| static void |
| until_break_command_continuation (void *arg) |
| { |
| struct until_break_command_continuation_args *a = arg; |
| |
| delete_breakpoint (a->breakpoint); |
| if (a->breakpoint2) |
| delete_breakpoint (a->breakpoint2); |
| } |
| |
| void |
| until_break_command (char *arg, int from_tty, int anywhere) |
| { |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| struct frame_info *frame = get_selected_frame (NULL); |
| struct frame_info *prev_frame = get_prev_frame (frame); |
| struct breakpoint *breakpoint; |
| struct breakpoint *breakpoint2 = NULL; |
| struct cleanup *old_chain; |
| |
| clear_proceed_status (); |
| |
| /* Set a breakpoint where the user wants it and at return from |
| this function */ |
| |
| if (default_breakpoint_valid) |
| sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| default_breakpoint_line, (char ***) NULL, NULL); |
| else |
| sals = decode_line_1 (&arg, 1, (struct symtab *) NULL, |
| 0, (char ***) NULL, NULL); |
| |
| if (sals.nelts != 1) |
| error (_("Couldn't get information on specified line.")); |
| |
| sal = sals.sals[0]; |
| xfree (sals.sals); /* malloc'd, so freed */ |
| |
| if (*arg) |
| error (_("Junk at end of arguments.")); |
| |
| resolve_sal_pc (&sal); |
| |
| if (anywhere) |
| /* If the user told us to continue until a specified location, |
| we don't specify a frame at which we need to stop. */ |
| breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_until); |
| else |
| /* Otherwise, specify the current frame, because we want to stop only |
| at the very same frame. */ |
| breakpoint = set_momentary_breakpoint (sal, get_frame_id (frame), |
| bp_until); |
| |
| old_chain = make_cleanup_delete_breakpoint (breakpoint); |
| |
| /* Keep within the current frame, or in frames called by the current |
| one. */ |
| if (prev_frame) |
| { |
| sal = find_pc_line (get_frame_pc (prev_frame), 0); |
| sal.pc = get_frame_pc (prev_frame); |
| breakpoint2 = set_momentary_breakpoint (sal, get_frame_id (prev_frame), |
| bp_until); |
| make_cleanup_delete_breakpoint (breakpoint2); |
| } |
| |
| proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
| |
| /* If we are running asynchronously, and proceed call above has actually |
| managed to start the target, arrange for breakpoints to be |
| deleted when the target stops. Otherwise, we're already stopped and |
| delete breakpoints via cleanup chain. */ |
| |
| if (target_can_async_p () && is_running (inferior_ptid)) |
| { |
| struct until_break_command_continuation_args *args; |
| args = xmalloc (sizeof (*args)); |
| |
| args->breakpoint = breakpoint; |
| args->breakpoint2 = breakpoint2; |
| |
| discard_cleanups (old_chain); |
| add_continuation (inferior_thread (), |
| until_break_command_continuation, args, |
| xfree); |
| } |
| else |
| do_cleanups (old_chain); |
| } |
| |
| static void |
| ep_skip_leading_whitespace (char **s) |
| { |
| if ((s == NULL) || (*s == NULL)) |
| return; |
| while (isspace (**s)) |
| *s += 1; |
| } |
| |
| /* This function attempts to parse an optional "if <cond>" clause |
| from the arg string. If one is not found, it returns NULL. |
| |
| Else, it returns a pointer to the condition string. (It does not |
| attempt to evaluate the string against a particular block.) And, |
| it updates arg to point to the first character following the parsed |
| if clause in the arg string. */ |
| |
| static char * |
| ep_parse_optional_if_clause (char **arg) |
| { |
| char *cond_string; |
| |
| if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2])) |
| return NULL; |
| |
| /* Skip the "if" keyword. */ |
| (*arg) += 2; |
| |
| /* Skip any extra leading whitespace, and record the start of the |
| condition string. */ |
| ep_skip_leading_whitespace (arg); |
| cond_string = *arg; |
| |
| /* Assume that the condition occupies the remainder of the arg string. */ |
| (*arg) += strlen (cond_string); |
| |
| return cond_string; |
| } |
| |
| /* This function attempts to parse an optional filename from the arg |
| string. If one is not found, it returns NULL. |
| |
| Else, it returns a pointer to the parsed filename. (This function |
| makes no attempt to verify that a file of that name exists, or is |
| accessible.) And, it updates arg to point to the first character |
| following the parsed filename in the arg string. |
| |
| Note that clients needing to preserve the returned filename for |
| future access should copy it to their own buffers. */ |
| static char * |
| ep_parse_optional_filename (char **arg) |
| { |
| static char filename[1024]; |
| char *arg_p = *arg; |
| int i; |
| char c; |
| |
| if ((*arg_p == '\0') || isspace (*arg_p)) |
| return NULL; |
| |
| for (i = 0;; i++) |
| { |
| c = *arg_p; |
| if (isspace (c)) |
| c = '\0'; |
| filename[i] = c; |
| if (c == '\0') |
| break; |
| arg_p++; |
| } |
| *arg = arg_p; |
| |
| return filename; |
| } |
| |
| /* Commands to deal with catching events, such as signals, exceptions, |
| process start/exit, etc. */ |
| |
| typedef enum |
| { |
| catch_fork_temporary, catch_vfork_temporary, |
| catch_fork_permanent, catch_vfork_permanent |
| } |
| catch_fork_kind; |
| |
| static void |
| catch_fork_command_1 (char *arg, int from_tty, struct cmd_list_element *command) |
| { |
| char *cond_string = NULL; |
| catch_fork_kind fork_kind; |
| int tempflag; |
| |
| fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command); |
| tempflag = (fork_kind == catch_fork_temporary |
| || fork_kind == catch_vfork_temporary); |
| |
| if (!arg) |
| arg = ""; |
| ep_skip_leading_whitespace (&arg); |
| |
| /* The allowed syntax is: |
| catch [v]fork |
| catch [v]fork if <cond> |
| |
| First, check if there's an if clause. */ |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error (_("Junk at end of arguments.")); |
| |
| /* If this target supports it, create a fork or vfork catchpoint |
| and enable reporting of such events. */ |
| switch (fork_kind) |
| { |
| case catch_fork_temporary: |
| case catch_fork_permanent: |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, |
| &catch_fork_breakpoint_ops); |
| break; |
| case catch_vfork_temporary: |
| case catch_vfork_permanent: |
| create_fork_vfork_event_catchpoint (tempflag, cond_string, |
| &catch_vfork_breakpoint_ops); |
| break; |
| default: |
| error (_("unsupported or unknown fork kind; cannot catch it")); |
| break; |
| } |
| } |
| |
| static void |
| catch_exec_command_1 (char *arg, int from_tty, struct cmd_list_element *command) |
| { |
| int tempflag; |
| char *cond_string = NULL; |
| |
| tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| |
| if (!arg) |
| arg = ""; |
| ep_skip_leading_whitespace (&arg); |
| |
| /* The allowed syntax is: |
| catch exec |
| catch exec if <cond> |
| |
| First, check if there's an if clause. */ |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error (_("Junk at end of arguments.")); |
| |
| /* If this target supports it, create an exec catchpoint |
| and enable reporting of such events. */ |
| create_catchpoint (tempflag, cond_string, &catch_exec_breakpoint_ops); |
| } |
| |
| static enum print_stop_action |
| print_exception_catchpoint (struct breakpoint *b) |
| { |
| int bp_temp, bp_throw; |
| |
| annotate_catchpoint (b->number); |
| |
| bp_throw = strstr (b->addr_string, "throw") != NULL; |
| if (b->loc->address != b->loc->requested_address) |
| breakpoint_adjustment_warning (b->loc->requested_address, |
| b->loc->address, |
| b->number, 1); |
| bp_temp = b->loc->owner->disposition == disp_del; |
| ui_out_text (uiout, |
| bp_temp ? "Temporary catchpoint " |
| : "Catchpoint "); |
| if (!ui_out_is_mi_like_p (uiout)) |
| ui_out_field_int (uiout, "bkptno", b->number); |
| ui_out_text (uiout, |
| bp_throw ? " (exception thrown), " |
| : " (exception caught), "); |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| ui_out_field_string (uiout, "reason", |
| async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
| ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| ui_out_field_int (uiout, "bkptno", b->number); |
| } |
| return PRINT_SRC_AND_LOC; |
| } |
| |
| static void |
| print_one_exception_catchpoint (struct breakpoint *b, CORE_ADDR *last_addr) |
| { |
| struct value_print_options opts; |
| get_user_print_options (&opts); |
| if (opts.addressprint) |
| { |
| annotate_field (4); |
| if (b->loc == NULL || b->loc->shlib_disabled) |
| ui_out_field_string (uiout, "addr", "<PENDING>"); |
| else |
| ui_out_field_core_addr (uiout, "addr", b->loc->address); |
| } |
| annotate_field (5); |
| if (b->loc) |
| *last_addr = b->loc->address; |
| if (strstr (b->addr_string, "throw") != NULL) |
| ui_out_field_string (uiout, "what", "exception throw"); |
| else |
| ui_out_field_string (uiout, "what", "exception catch"); |
| } |
| |
| static void |
| print_mention_exception_catchpoint (struct breakpoint *b) |
| { |
| int bp_temp; |
| int bp_throw; |
| |
| bp_temp = b->loc->owner->disposition == disp_del; |
| bp_throw = strstr (b->addr_string, "throw") != NULL; |
| ui_out_text (uiout, bp_temp ? _("Temporary catchpoint ") |
| : _("Catchpoint ")); |
| ui_out_field_int (uiout, "bkptno", b->number); |
| ui_out_text (uiout, bp_throw ? _(" (throw)") |
| : _(" (catch)")); |
| } |
| |
| static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = { |
| NULL, /* insert */ |
| NULL, /* remove */ |
| NULL, /* breakpoint_hit */ |
| print_exception_catchpoint, |
| print_one_exception_catchpoint, |
| print_mention_exception_catchpoint |
| }; |
| |
| static int |
| handle_gnu_v3_exceptions (int tempflag, char *cond_string, |
| enum exception_event_kind ex_event, int from_tty) |
| { |
| char *trigger_func_name; |
| |
| if (ex_event == EX_EVENT_CATCH) |
| trigger_func_name = "__cxa_begin_catch"; |
| else |
| trigger_func_name = "__cxa_throw"; |
| |
| break_command_really (trigger_func_name, cond_string, -1, |
| 0 /* condition and thread are valid. */, |
| tempflag, 0, |
| 0, |
| AUTO_BOOLEAN_TRUE /* pending */, |
| &gnu_v3_exception_catchpoint_ops, from_tty, |
| 1 /* enabled */); |
| |
| return 1; |
| } |
| |
| /* Deal with "catch catch" and "catch throw" commands */ |
| |
| static void |
| catch_exception_command_1 (enum exception_event_kind ex_event, char *arg, |
| int tempflag, int from_tty) |
| { |
| char *cond_string = NULL; |
| struct symtab_and_line *sal = NULL; |
| |
| if (!arg) |
| arg = ""; |
| ep_skip_leading_whitespace (&arg); |
| |
| cond_string = ep_parse_optional_if_clause (&arg); |
| |
| if ((*arg != '\0') && !isspace (*arg)) |
| error (_("Junk at end of arguments.")); |
| |
| if ((ex_event != EX_EVENT_THROW) && |
| (ex_event != EX_EVENT_CATCH)) |
| error (_("Unsupported or unknown exception event; cannot catch it")); |
| |
| if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty)) |
| return; |
| |
| warning (_("Unsupported with this platform/compiler combination.")); |
| } |
| |
| /* Implementation of "catch catch" command. */ |
| |
| static void |
| catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command) |
| { |
| int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty); |
| } |
| |
| /* Implementation of "catch throw" command. */ |
| |
| static void |
| catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command) |
| { |
| int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty); |
| } |
| |
| /* Create a breakpoint struct for Ada exception catchpoints. */ |
| |
| static void |
| create_ada_exception_breakpoint (struct symtab_and_line sal, |
| char *addr_string, |
| char *exp_string, |
| char *cond_string, |
| struct expression *cond, |
| struct breakpoint_ops *ops, |
| int tempflag, |
| int from_tty) |
| { |
| struct breakpoint *b; |
| |
| if (from_tty) |
| { |
| describe_other_breakpoints (sal.pc, sal.section, -1); |
| /* FIXME: brobecker/2006-12-28: Actually, re-implement a special |
| version for exception catchpoints, because two catchpoints |
| used for different exception names will use the same address. |
| In this case, a "breakpoint ... also set at..." warning is |
| unproductive. Besides. the warning phrasing is also a bit |
| inapropriate, we should use the word catchpoint, and tell |
| the user what type of catchpoint it is. The above is good |
| enough for now, though. */ |
| } |
| |
| b = set_raw_breakpoint (sal, bp_breakpoint); |
| set_breakpoint_count (breakpoint_count + 1); |
| |
| b->enable_state = bp_enabled; |
| b->disposition = tempflag ? disp_del : disp_donttouch; |
| b->number = breakpoint_count; |
| b->ignore_count = 0; |
| b->loc->cond = cond; |
| b->addr_string = addr_string; |
| b->language = language_ada; |
| b->cond_string = cond_string; |
| b->exp_string = exp_string; |
| b->thread = -1; |
| b->ops = ops; |
| |
| mention (b); |
| update_global_location_list (1); |
| } |
| |
| /* Implement the "catch exception" command. */ |
| |
| static void |
| catch_ada_exception_command (char *arg, int from_tty, |
| struct cmd_list_element *command) |
| { |
| int tempflag; |
| struct symtab_and_line sal; |
| enum bptype type; |
| char *addr_string = NULL; |
| char *exp_string = NULL; |
| char *cond_string = NULL; |
| struct expression *cond = NULL; |
| struct breakpoint_ops *ops = NULL; |
| |
| tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| |
| if (!arg) |
| arg = ""; |
| sal = ada_decode_exception_location (arg, &addr_string, &exp_string, |
| &cond_string, &cond, &ops); |
| create_ada_exception_breakpoint (sal, addr_string, exp_string, |
| cond_string, cond, ops, tempflag, |
| from_tty); |
| } |
| |
| /* Implement the "catch assert" command. */ |
| |
| static void |
| catch_assert_command (char *arg, int from_tty, struct cmd_list_element *command) |
| { |
| int tempflag; |
| struct symtab_and_line sal; |
| char *addr_string = NULL; |
| struct breakpoint_ops *ops = NULL; |
| |
| tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| |
| if (!arg) |
| arg = ""; |
| sal = ada_decode_assert_location (arg, &addr_string, &ops); |
| create_ada_exception_breakpoint (sal, addr_string, NULL, NULL, NULL, ops, |
| tempflag, from_tty); |
| } |
| |
| static void |
| catch_command (char *arg, int from_tty) |
| { |
| error (_("Catch requires an event name.")); |
| } |
| |
| |
| static void |
| tcatch_command (char *arg, int from_tty) |
| { |
| error (_("Catch requires an event name.")); |
| } |
| |
| /* Delete breakpoints by address or line. */ |
| |
| static void |
| clear_command (char *arg, int from_tty) |
| { |
| struct breakpoint *b; |
| VEC(breakpoint_p) *found = 0; |
| int ix; |
| int default_match; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| int i; |
| |
| if (arg) |
| { |
| sals = decode_line_spec (arg, 1); |
| default_match = 0; |
| } |
| else |
| { |
| sals.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| make_cleanup (xfree, sals.sals); |
| init_sal (&sal); /* initialize to zeroes */ |
| sal.line = default_breakpoint_line; |
| sal.symtab = default_breakpoint_symtab; |
| sal.pc = default_breakpoint_address; |
| if (sal.symtab == 0) |
| error (_("No source file specified.")); |
| |
| sals.sals[0] = sal; |
| sals.nelts = 1; |
| |
| default_match = 1; |
| } |
| |
| /* We don't call resolve_sal_pc here. That's not |
| as bad as it seems, because all existing breakpoints |
| typically have both file/line and pc set. So, if |
| clear is given file/line, we can match this to existing |
| breakpoint without obtaining pc at all. |
| |
| We only support clearing given the address explicitly |
| present in breakpoint table. Say, we've set breakpoint |
| at file:line. There were several PC values for that file:line, |
| due to optimization, all in one block. |
| We've picked one PC value. If "clear" is issued with another |
| PC corresponding to the same file:line, the breakpoint won't |
| be cleared. We probably can still clear the breakpoint, but |
| since the other PC value is never presented to user, user |
| can only find it by guessing, and it does not seem important |
| to support that. */ |
| |
| /* For each line spec given, delete bps which correspond |
| to it. Do it in two passes, solely to preserve the current |
| behavior that from_tty is forced true if we delete more than |
| one breakpoint. */ |
| |
| found = NULL; |
| for (i = 0; i < sals.nelts; i++) |
| { |
| /* If exact pc given, clear bpts at that pc. |
| If line given (pc == 0), clear all bpts on specified line. |
| If defaulting, clear all bpts on default line |
| or at default pc. |
| |
| defaulting sal.pc != 0 tests to do |
| |
| 0 1 pc |
| 1 1 pc _and_ line |
| 0 0 line |
| 1 0 <can't happen> */ |
| |
| sal = sals.sals[i]; |
| |
| /* Find all matching breakpoints and add them to |
| 'found'. */ |
| ALL_BREAKPOINTS (b) |
| { |
| int match = 0; |
| /* Are we going to delete b? */ |
| if (b->type != bp_none |
| && b->type != bp_watchpoint |
| && b->type != bp_hardware_watchpoint |
| && b->type != bp_read_watchpoint |
| && b->type != bp_access_watchpoint) |
| { |
| struct bp_location *loc = b->loc; |
| for (; loc; loc = loc->next) |
| { |
| int pc_match = sal.pc |
| && (loc->address == sal.pc) |
| && (!section_is_overlay (loc->section) |
| || loc->section == sal.section); |
| int line_match = ((default_match || (0 == sal.pc)) |
| && b->source_file != NULL |
| && sal.symtab != NULL |
| && strcmp (b->source_file, sal.symtab->filename) == 0 |
| && b->line_number == sal.line); |
| if (pc_match || line_match) |
| { |
| match = 1; |
| break; |
| } |
| } |
| } |
| |
| if (match) |
| VEC_safe_push(breakpoint_p, found, b); |
| } |
| } |
| /* Now go thru the 'found' chain and delete them. */ |
| if (VEC_empty(breakpoint_p, found)) |
| { |
| if (arg) |
| error (_("No breakpoint at %s."), arg); |
| else |
| error (_("No breakpoint at this line.")); |
| } |
| |
| if (VEC_length(breakpoint_p, found) > 1) |
| from_tty = 1; /* Always report if deleted more than one */ |
| if (from_tty) |
| { |
| if (VEC_length(breakpoint_p, found) == 1) |
| printf_unfiltered (_("Deleted breakpoint ")); |
| else |
| printf_unfiltered (_("Deleted breakpoints ")); |
| } |
| breakpoints_changed (); |
| |
| for (ix = 0; VEC_iterate(breakpoint_p, found, ix, b); ix++) |
| { |
| if (from_tty) |
| printf_unfiltered ("%d ", b->number); |
| delete_breakpoint (b); |
| } |
| if (from_tty) |
| putchar_unfiltered ('\n'); |
| } |
| |
| /* Delete breakpoint in BS if they are `delete' breakpoints and |
| all breakpoints that are marked for deletion, whether hit or not. |
| This is called after any breakpoint is hit, or after errors. */ |
| |
| void |
| breakpoint_auto_delete (bpstat bs) |
| { |
| struct breakpoint *b, *temp; |
| |
| for (; bs; bs = bs->next) |
| if (bs->breakpoint_at |
| && bs->breakpoint_at->owner |
| && bs->breakpoint_at->owner->disposition == disp_del |
| && bs->stop) |
| delete_breakpoint (bs->breakpoint_at->owner); |
| |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->disposition == disp_del_at_next_stop) |
| delete_breakpoint (b); |
| } |
| } |
| |
| /* A cleanup function which destroys a vector. */ |
| |
| static void |
| do_vec_free (void *p) |
| { |
| VEC(bp_location_p) **vec = p; |
| if (*vec) |
| VEC_free (bp_location_p, *vec); |
| } |
| |
| /* If SHOULD_INSERT is false, do not insert any breakpoint locations |
| into the inferior, only remove already-inserted locations that no |
| longer should be inserted. Functions that delete a breakpoint or |
| breakpoints should pass false, so that deleting a breakpoint |
| doesn't have the side effect of inserting the locations of other |
| breakpoints that are marked not-inserted, but should_be_inserted |
| returns true on them. |
| |
| This behaviour is useful is situations close to tear-down -- e.g., |
| after an exec, while the target still has execution, but breakpoint |
| shadows of the previous executable image should *NOT* be restored |
| to the new image; or before detaching, where the target still has |
| execution and wants to delete breakpoints from GDB's lists, and all |
| breakpoints had already been removed from the inferior. */ |
| |
| static void |
| update_global_location_list (int should_insert) |
| { |
| struct breakpoint *b; |
| struct bp_location **next = &bp_location_chain; |
| struct bp_location *loc; |
| struct bp_location *loc2; |
| VEC(bp_location_p) *old_locations = NULL; |
| int ret; |
| int ix; |
| struct cleanup *cleanups; |
| |
| cleanups = make_cleanup (do_vec_free, &old_locations); |
| /* Store old locations for future reference. */ |
| for (loc = bp_location_chain; loc; loc = loc->global_next) |
| VEC_safe_push (bp_location_p, old_locations, loc); |
| |
| bp_location_chain = NULL; |
| ALL_BREAKPOINTS (b) |
| { |
| for (loc = b->loc; loc; loc = loc->next) |
| { |
| *next = loc; |
| next = &(loc->global_next); |
| *next = NULL; |
| } |
| } |
| |
| /* Identify bp_location instances that are no longer present in the new |
| list, and therefore should be freed. Note that it's not necessary that |
| those locations should be removed from inferior -- if there's another |
| location at the same address (previously marked as duplicate), |
| we don't need to remove/insert the location. */ |
| for (ix = 0; VEC_iterate(bp_location_p, old_locations, ix, loc); ++ix) |
| { |
| /* Tells if 'loc' is found amoung the new locations. If not, we |
| have to free it. */ |
| int found_object = 0; |
| /* Tells if the location should remain inserted in the target. */ |
| int keep_in_target = 0; |
| int removed = 0; |
| for (loc2 = bp_location_chain; loc2; loc2 = loc2->global_next) |
| if (loc2 == loc) |
| { |
| found_object = 1; |
| break; |
| } |
| |
| /* If this location is no longer present, and inserted, look if there's |
| maybe a new location at the same address. If so, mark that one |
| inserted, and don't remove this one. This is needed so that we |
| don't have a time window where a breakpoint at certain location is not |
| inserted. */ |
| |
| if (loc->inserted) |
| { |
| /* If the location is inserted now, we might have to remove it. */ |
| |
| if (found_object && should_be_inserted (loc)) |
| { |
| /* The location is still present in the location list, and still |
| should be inserted. Don't do anything. */ |
| keep_in_target = 1; |
| } |
| else |
| { |
| /* The location is either no longer present, or got disabled. |
| See if there's another location at the same address, in which |
| case we don't need to remove this one from the target. */ |
| if (breakpoint_address_is_meaningful (loc->owner)) |
| for (loc2 = bp_location_chain; loc2; loc2 = loc2->global_next) |
| { |
| /* For the sake of should_insert_location. The |
| call to check_duplicates will fix up this later. */ |
| loc2->duplicate = 0; |
| if (should_be_inserted (loc2) |
| && loc2 != loc && loc2->address == loc->address) |
| { |
| loc2->inserted = 1; |
| loc2->target_info = loc->target_info; |
| keep_in_target = 1; |
| break; |
| } |
| } |
| } |
| |
| if (!keep_in_target) |
| { |
| if (remove_breakpoint (loc, mark_uninserted)) |
| { |
| /* This is just about all we can do. We could keep this |
| location on the global list, and try to remove it next |
| time, but there's no particular reason why we will |
| succeed next time. |
| |
| Note that at this point, loc->owner is still valid, |
| as delete_breakpoint frees the breakpoint only |
| after calling us. */ |
| printf_filtered (_("warning: Error removing breakpoint %d\n"), |
| loc->owner->number); |
| } |
| removed = 1; |
| } |
| } |
| |
| if (!found_object) |
| { |
| if (removed && non_stop) |
| { |
| /* This location was removed from the targets. In non-stop mode, |
| a race condition is possible where we've removed a breakpoint, |
| but stop events for that breakpoint are already queued and will |
| arrive later. To suppress spurious SIGTRAPs reported to user, |
| we keep this breakpoint location for a bit, and will retire it |
| after we see 3 * thread_count events. |
| The theory here is that reporting of events should, |
| "on the average", be fair, so after that many event we'll see |
| events from all threads that have anything of interest, and no |
| longer need to keep this breakpoint. This is just a |
| heuristic, but if it's wrong, we'll report unexpected SIGTRAP, |
| which is usability issue, but not a correctness problem. */ |
| loc->events_till_retirement = 3 * (thread_count () + 1); |
| loc->owner = NULL; |
| |
| VEC_safe_push (bp_location_p, moribund_locations, loc); |
| } |
| else |
| free_bp_location (loc); |
| } |
| } |
| |
| ALL_BREAKPOINTS (b) |
| { |
| check_duplicates (b); |
| } |
| |
| if (breakpoints_always_inserted_mode () && should_insert |
| && (target_has_execution |
| || (gdbarch_has_global_solist (target_gdbarch) |
| && target_supports_multi_process ()))) |
| insert_breakpoint_locations (); |
| |
| do_cleanups (cleanups); |
| } |
| |
| void |
| breakpoint_retire_moribund (void) |
| { |
| struct bp_location *loc; |
| int ix; |
| |
| for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix) |
| if (--(loc->events_till_retirement) == 0) |
| { |
| free_bp_location (loc); |
| VEC_unordered_remove (bp_location_p, moribund_locations, ix); |
| --ix; |
| } |
| } |
| |
| static void |
| update_global_location_list_nothrow (int inserting) |
| { |
| struct gdb_exception e; |
| TRY_CATCH (e, RETURN_MASK_ERROR) |
| update_global_location_list (inserting); |
| } |
| |
| /* Clear BPT from a BPS. */ |
| static void |
| bpstat_remove_breakpoint (bpstat bps, struct breakpoint *bpt) |
| { |
| bpstat bs; |
| for (bs = bps; bs; bs = bs->next) |
| if (bs->breakpoint_at && bs->breakpoint_at->owner == bpt) |
| { |
| bs->breakpoint_at = NULL; |
| bs->old_val = NULL; |
| /* bs->commands will be freed later. */ |
| } |
| } |
| |
| /* Callback for iterate_over_threads. */ |
| static int |
| bpstat_remove_breakpoint_callback (struct thread_info *th, void *data) |
| { |
| struct breakpoint *bpt = data; |
| bpstat_remove_breakpoint (th->stop_bpstat, bpt); |
| return 0; |
| } |
| |
| /* Delete a breakpoint and clean up all traces of it in the data |
| structures. */ |
| |
| void |
| delete_breakpoint (struct breakpoint *bpt) |
| { |
| struct breakpoint *b; |
| struct bp_location *loc, *next; |
| |
| gdb_assert (bpt != NULL); |
| |
| /* Has this bp already been deleted? This can happen because multiple |
| lists can hold pointers to bp's. bpstat lists are especial culprits. |
| |
| One example of this happening is a watchpoint's scope bp. When the |
| scope bp triggers, we notice that the watchpoint is out of scope, and |
| delete it. We also delete its scope bp. But the scope bp is marked |
| "auto-deleting", and is already on a bpstat. That bpstat is then |
| checked for auto-deleting bp's, which are deleted. |
| |
| A real solution to this problem might involve reference counts in bp's, |
| and/or giving them pointers back to their referencing bpstat's, and |
| teaching delete_breakpoint to only free a bp's storage when no more |
| references were extent. A cheaper bandaid was chosen. */ |
| if (bpt->type == bp_none) |
| return; |
| |
| observer_notify_breakpoint_deleted (bpt->number); |
| |
| if (breakpoint_chain == bpt) |
| breakpoint_chain = bpt->next; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->next == bpt) |
| { |
| b->next = bpt->next; |
| break; |
| } |
| |
| free_command_lines (&bpt->commands); |
| if (bpt->cond_string != NULL) |
| xfree (bpt->cond_string); |
| if (bpt->addr_string != NULL) |
| xfree (bpt->addr_string); |
| if (bpt->exp != NULL) |
| xfree (bpt->exp); |
| if (bpt->exp_string != NULL) |
| xfree (bpt->exp_string); |
| if (bpt->val != NULL) |
| value_free (bpt->val); |
| if (bpt->source_file != NULL) |
| xfree (bpt->source_file); |
| if (bpt->exec_pathname != NULL) |
| xfree (bpt->exec_pathname); |
| |
| /* Be sure no bpstat's are pointing at it after it's been freed. */ |
| /* FIXME, how can we find all bpstat's? |
| We just check stop_bpstat for now. Note that we cannot just |
| remove bpstats pointing at bpt from the stop_bpstat list |
| entirely, as breakpoint commands are associated with the bpstat; |
| if we remove it here, then the later call to |
| bpstat_do_actions (&stop_bpstat); |
| in event-top.c won't do anything, and temporary breakpoints |
| with commands won't work. */ |
| |
| iterate_over_threads (bpstat_remove_breakpoint_callback, bpt); |
| |
| /* Now that breakpoint is removed from breakpoint |
| list, update the global location list. This |
| will remove locations that used to belong to |
| this breakpoint. Do this before freeing |
| the breakpoint itself, since remove_breakpoint |
| looks at location's owner. It might be better |
| design to have location completely self-contained, |
| but it's not the case now. */ |
| update_global_location_list (0); |
| |
| |
| /* On the chance that someone will soon try again to delete this same |
| bp, we mark it as deleted before freeing its storage. */ |
| bpt->type = bp_none; |
| |
| xfree (bpt); |
| } |
| |
| static void |
| do_delete_breakpoint_cleanup (void *b) |
| { |
| delete_breakpoint (b); |
| } |
| |
| struct cleanup * |
| make_cleanup_delete_breakpoint (struct breakpoint *b) |
| { |
| return make_cleanup (do_delete_breakpoint_cleanup, b); |
| } |
| |
| void |
| delete_command (char *arg, int from_tty) |
| { |
| struct breakpoint *b, *temp; |
| |
| dont_repeat (); |
| |
| if (arg == 0) |
| { |
| int breaks_to_delete = 0; |
| |
| /* Delete all breakpoints if no argument. |
| Do not delete internal or call-dummy breakpoints, these |
| have to be deleted with an explicit breakpoint number argument. */ |
| ALL_BREAKPOINTS (b) |
| { |
| if (b->type != bp_call_dummy && |
| b->type != bp_shlib_event && |
| b->type != bp_thread_event && |
| b->type != bp_overlay_event && |
| b->number >= 0) |
| { |
| breaks_to_delete = 1; |
| break; |
| } |
| } |
| |
| /* Ask user only if there are some breakpoints to delete. */ |
| if (!from_tty |
| || (breaks_to_delete && query (_("Delete all breakpoints? ")))) |
| { |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| if (b->type != bp_call_dummy && |
| b->type != bp_shlib_event && |
| b->type != bp_thread_event && |
| b->type != bp_overlay_event && |
| b->number >= 0) |
| delete_breakpoint (b); |
| } |
| } |
| } |
| else |
| map_breakpoint_numbers (arg, delete_breakpoint); |
| } |
| |
| static int |
| all_locations_are_pending (struct bp_location *loc) |
| { |
| for (; loc; loc = loc->next) |
| if (!loc->shlib_disabled) |
| return 0; |
| return 1; |
| } |
| |
| /* Subroutine of update_breakpoint_locations to simplify it. |
| Return non-zero if multiple fns in list LOC have the same name. |
| Null names are ignored. */ |
| |
| static int |
| ambiguous_names_p (struct bp_location *loc) |
| { |
| struct bp_location *l; |
| htab_t htab = htab_create_alloc (13, htab_hash_string, |
| (int (*) (const void *, const void *)) streq, |
| NULL, xcalloc, xfree); |
| |
| for (l = loc; l != NULL; l = l->next) |
| { |
| const char **slot; |
| const char *name = l->function_name; |
| |
| /* Allow for some names to be NULL, ignore them. */ |
| if (name == NULL) |
| continue; |
| |
| slot = (const char **) htab_find_slot (htab, (const void *) name, |
| INSERT); |
| /* NOTE: We can assume slot != NULL here because xcalloc never returns |
| NULL. */ |
| if (*slot != NULL) |
| { |
| htab_delete (htab); |
| return 1; |
| } |
| *slot = name; |
| } |
| |
| htab_delete (htab); |
| return 0; |
| } |
| |
| static void |
| update_breakpoint_locations (struct breakpoint *b, |
| struct symtabs_and_lines sals) |
| { |
| int i; |
| char *s; |
| struct bp_location *existing_locations = b->loc; |
| |
| /* If there's no new locations, and all existing locations |
| are pending, don't do anything. This optimizes |
| the common case where all locations are in the same |
| shared library, that was unloaded. We'd like to |
| retain the location, so that when the library |
| is loaded again, we don't loose the enabled/disabled |
| status of the individual locations. */ |
| if (all_locations_are_pending (existing_locations) && sals.nelts == 0) |
| return; |
| |
| b->loc = NULL; |
| |
| for (i = 0; i < sals.nelts; ++i) |
| { |
| struct bp_location *new_loc = |
| add_location_to_breakpoint (b, &(sals.sals[i])); |
| |
| /* Reparse conditions, they might contain references to the |
| old symtab. */ |
| if (b->cond_string != NULL) |
| { |
| struct gdb_exception e; |
| |
| s = b->cond_string; |
| TRY_CATCH (e, RETURN_MASK_ERROR) |
| { |
| new_loc->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), |
| 0); |
| } |
| if (e.reason < 0) |
| { |
| warning (_("failed to reevaluate condition for breakpoint %d: %s"), |
| b->number, e.message); |
| new_loc->enabled = 0; |
| } |
| } |
| |
| if (b->source_file != NULL) |
| xfree (b->source_file); |
| if (sals.sals[i].symtab == NULL) |
| b->source_file = NULL; |
| else |
| b->source_file = |
| savestring (sals.sals[i].symtab->filename, |
| strlen (sals.sals[i].symtab->filename)); |
| |
| if (b->line_number == 0) |
| b->line_number = sals.sals[i].line; |
| } |
| |
| /* Update locations of permanent breakpoints. */ |
| if (b->enable_state == bp_permanent) |
| make_breakpoint_permanent (b); |
| |
| /* If possible, carry over 'disable' status from existing breakpoints. */ |
| { |
| struct bp_location *e = existing_locations; |
| /* If there are multiple breakpoints with the same function name, |
| e.g. for inline functions, comparing function names won't work. |
| Instead compare pc addresses; this is just a heuristic as things |
| may have moved, but in practice it gives the correct answer |
| often enough until a better solution is found. */ |
| int have_ambiguous_names = ambiguous_names_p (b->loc); |
| |
| for (; e; e = e->next) |
| { |
| if (!e->enabled && e->function_name) |
| { |
| struct bp_location *l = b->loc; |
| if (have_ambiguous_names) |
| { |
| for (; l; l = l->next) |
| if (e->address == l->address) |
| { |
| l->enabled = 0; |
| break; |
| } |
| } |
| else |
| { |
| for (; l; l = l->next) |
| if (l->function_name |
| && strcmp (e->function_name, l->function_name) == 0) |
| { |
| l->enabled = 0; |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| update_global_location_list (1); |
| } |
| |
| |
| /* Reset a breakpoint given it's struct breakpoint * BINT. |
| The value we return ends up being the return value from catch_errors. |
| Unused in this case. */ |
| |
| static int |
| breakpoint_re_set_one (void *bint) |
| { |
| /* get past catch_errs */ |
| struct breakpoint *b = (struct breakpoint *) bint; |
| struct value *mark; |
| int i; |
| int not_found = 0; |
| int *not_found_ptr = ¬_found; |
| struct symtabs_and_lines sals = {}; |
| struct symtabs_and_lines expanded; |
| char *s; |
| enum enable_state save_enable; |
| struct gdb_exception e; |
| struct cleanup *cleanups; |
| |
| switch (b->type) |
| { |
| case bp_none: |
| warning (_("attempted to reset apparently deleted breakpoint #%d?"), |
| b->number); |
| return 0; |
| case bp_breakpoint: |
| case bp_hardware_breakpoint: |
| if (b->addr_string == NULL) |
| { |
| /* Anything without a string can't be re-set. */ |
| delete_breakpoint (b); |
| return 0; |
| } |
| |
| set_language (b->language); |
| input_radix = b->input_radix; |
| s = b->addr_string; |
| TRY_CATCH (e, RETURN_MASK_ERROR) |
| { |
| sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL, |
| not_found_ptr); |
| } |
| if (e.reason < 0) |
| { |
| int not_found_and_ok = 0; |
| /* For pending breakpoints, it's expected that parsing |
| will fail until the right shared library is loaded. |
| User has already told to create pending breakpoints and |
| don't need extra messages. If breakpoint is in bp_shlib_disabled |
| state, then user already saw the message about that breakpoint |
| being disabled, and don't want to see more errors. */ |
| if (not_found |
| && (b->condition_not_parsed |
| || (b->loc && b->loc->shlib_disabled) |
| || b->enable_state == bp_disabled)) |
| not_found_and_ok = 1; |
| |
| if (!not_found_and_ok) |
| { |
| /* We surely don't want to warn about the same breakpoint |
| 10 times. One solution, implemented here, is disable |
| the breakpoint on error. Another solution would be to |
| have separate 'warning emitted' flag. Since this |
| happens only when a binary has changed, I don't know |
| which approach is better. */ |
| b->enable_state = bp_disabled; |
| throw_exception (e); |
| } |
| } |
| |
| if (not_found) |
| break; |
| |
| gdb_assert (sals.nelts == 1); |
| resolve_sal_pc (&sals.sals[0]); |
| if (b->condition_not_parsed && s && s[0]) |
| { |
| char *cond_string = 0; |
| int thread = -1; |
| find_condition_and_thread (s, sals.sals[0].pc, |
| &cond_string, &thread); |
| if (cond_string) |
| b->cond_string = cond_string; |
| b->thread = thread; |
| b->condition_not_parsed = 0; |
| } |
| expanded = expand_line_sal_maybe (sals.sals[0]); |
| cleanups = make_cleanup (xfree, sals.sals); |
| update_breakpoint_locations (b, expanded); |
| do_cleanups (cleanups); |
| break; |
| |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| /* Watchpoint can be either on expression using entirely global variables, |
| or it can be on local variables. |
| |
| Watchpoints of the first kind are never auto-deleted, and even persist |
| across program restarts. Since they can use variables from shared |
| libraries, we need to reparse expression as libraries are loaded |
| and unloaded. |
| |
| Watchpoints on local variables can also change meaning as result |
| of solib event. For example, if a watchpoint uses both a local and |
| a global variables in expression, it's a local watchpoint, but |
| unloading of a shared library will make the expression invalid. |
| This is not a very common use case, but we still re-evaluate |
| expression, to avoid surprises to the user. |
| |
| Note that for local watchpoints, we re-evaluate it only if |
| watchpoints frame id is still valid. If it's not, it means |
| the watchpoint is out of scope and will be deleted soon. In fact, |
| I'm not sure we'll ever be called in this case. |
| |
| If a local watchpoint's frame id is still valid, then |
| b->exp_valid_block is likewise valid, and we can safely use it. |
| |
| Don't do anything about disabled watchpoints, since they will |
| be reevaluated again when enabled. */ |
| update_watchpoint (b, 1 /* reparse */); |
| break; |
| /* We needn't really do anything to reset these, since the mask |
| that requests them is unaffected by e.g., new libraries being |
| loaded. */ |
| case bp_catchpoint: |
| break; |
| |
| default: |
| printf_filtered (_("Deleting unknown breakpoint type %d\n"), b->type); |
| /* fall through */ |
| /* Delete overlay event breakpoints; they will be reset later by |
| breakpoint_re_set. */ |
| case bp_overlay_event: |
| delete_breakpoint (b); |
| break; |
| |
| /* This breakpoint is special, it's set up when the inferior |
| starts and we really don't want to touch it. */ |
| case bp_shlib_event: |
| |
| /* Like bp_shlib_event, this breakpoint type is special. |
| Once it is set up, we do not want to touch it. */ |
| case bp_thread_event: |
| |
| /* Keep temporary breakpoints, which can be encountered when we step |
| over a dlopen call and SOLIB_ADD is resetting the breakpoints. |
| Otherwise these should have been blown away via the cleanup chain |
| or by breakpoint_init_inferior when we rerun the executable. */ |
| case bp_until: |
| case bp_finish: |
| case bp_watchpoint_scope: |
| case bp_call_dummy: |
| case bp_step_resume: |
| case bp_longjmp: |
| case bp_longjmp_resume: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /* Re-set all breakpoints after symbols have been re-loaded. */ |
| void |
| breakpoint_re_set (void) |
| { |
| struct breakpoint *b, *temp; |
| enum language save_language; |
| int save_input_radix; |
| |
| save_language = current_language->la_language; |
| save_input_radix = input_radix; |
| ALL_BREAKPOINTS_SAFE (b, temp) |
| { |
| /* Format possible error msg */ |
| char *message = xstrprintf ("Error in re-setting breakpoint %d: ", |
| b->number); |
| struct cleanup *cleanups = make_cleanup (xfree, message); |
| catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); |
| do_cleanups (cleanups); |
| } |
| set_language (save_language); |
| input_radix = save_input_radix; |
| |
| create_overlay_event_breakpoint ("_ovly_debug_event"); |
| } |
| |
| /* Reset the thread number of this breakpoint: |
| |
| - If the breakpoint is for all threads, leave it as-is. |
| - Else, reset it to the current thread for inferior_ptid. */ |
| void |
| breakpoint_re_set_thread (struct breakpoint *b) |
| { |
| if (b->thread != -1) |
| { |
| if (in_thread_list (inferior_ptid)) |
| b->thread = pid_to_thread_id (inferior_ptid); |
| } |
| } |
| |
| /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| If from_tty is nonzero, it prints a message to that effect, |
| which ends with a period (no newline). */ |
| |
| void |
| set_ignore_count (int bptnum, int count, int from_tty) |
| { |
| struct breakpoint *b; |
| |
| if (count < 0) |
| count = 0; |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bptnum) |
| { |
| b->ignore_count = count; |
| if (from_tty) |
| { |
| if (count == 0) |
| printf_filtered (_("Will stop next time breakpoint %d is reached."), |
| bptnum); |
| else if (count == 1) |
| printf_filtered (_("Will ignore next crossing of breakpoint %d."), |
| bptnum); |
| else |
| printf_filtered (_("Will ignore next %d crossings of breakpoint %d."), |
| count, bptnum); |
| } |
| breakpoints_changed (); |
| observer_notify_breakpoint_modified (b->number); |
| return; |
| } |
| |
| error (_("No breakpoint number %d."), bptnum); |
| } |
| |
| void |
| make_breakpoint_silent (struct breakpoint *b) |
| { |
| /* Silence the breakpoint. */ |
| b->silent = 1; |
| } |
| |
| /* Command to set ignore-count of breakpoint N to COUNT. */ |
| |
| static void |
| ignore_command (char *args, int from_tty) |
| { |
| char *p = args; |
| int num; |
| |
| if (p == 0) |
| error_no_arg (_("a breakpoint number")); |
| |
| num = get_number (&p); |
| if (num == 0) |
| error (_("bad breakpoint number: '%s'"), args); |
| if (*p == 0) |
| error (_("Second argument (specified ignore-count) is missing.")); |
| |
| set_ignore_count (num, |
| longest_to_int (value_as_long (parse_and_eval (p))), |
| from_tty); |
| if (from_tty) |
| printf_filtered ("\n"); |
| } |
| |
| /* Call FUNCTION on each of the breakpoints |
| whose numbers are given in ARGS. */ |
| |
| static void |
| map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *)) |
| { |
| char *p = args; |
| char *p1; |
| int num; |
| struct breakpoint *b, *tmp; |
| int match; |
| |
| if (p == 0) |
| error_no_arg (_("one or more breakpoint numbers")); |
| |
| while (*p) |
| { |
| match = 0; |
| p1 = p; |
| |
| num = get_number_or_range (&p1); |
| if (num == 0) |
| { |
| warning (_("bad breakpoint number at or near '%s'"), p); |
| } |
| else |
| { |
| ALL_BREAKPOINTS_SAFE (b, tmp) |
| if (b->number == num) |
| { |
| struct breakpoint *related_breakpoint = b->related_breakpoint; |
| match = 1; |
| function (b); |
| if (related_breakpoint) |
| function (related_breakpoint); |
| break; |
| } |
| if (match == 0) |
| printf_unfiltered (_("No breakpoint number %d.\n"), num); |
| } |
| p = p1; |
| } |
| } |
| |
| static struct bp_location * |
| find_location_by_number (char *number) |
| { |
| char *dot = strchr (number, '.'); |
| char *p1; |
| int bp_num; |
| int loc_num; |
| struct breakpoint *b; |
| struct bp_location *loc; |
| |
| *dot = '\0'; |
| |
| p1 = number; |
| bp_num = get_number_or_range (&p1); |
| if (bp_num == 0) |
| error (_("Bad breakpoint number '%s'"), number); |
| |
| ALL_BREAKPOINTS (b) |
| if (b->number == bp_num) |
| { |
| break; |
| } |
| |
| if (!b || b->number != bp_num) |
| error (_("Bad breakpoint number '%s'"), number); |
| |
| p1 = dot+1; |
| loc_num = get_number_or_range (&p1); |
| if (loc_num == 0) |
| error (_("Bad breakpoint location number '%s'"), number); |
| |
| --loc_num; |
| loc = b->loc; |
| for (;loc_num && loc; --loc_num, loc = loc->next) |
| ; |
| if (!loc) |
| error (_("Bad breakpoint location number '%s'"), dot+1); |
| |
| return loc; |
| } |
| |
| |
| /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| If from_tty is nonzero, it prints a message to that effect, |
| which ends with a period (no newline). */ |
| |
| void |
| disable_breakpoint (struct breakpoint *bpt) |
| { |
| /* Never disable a watchpoint scope breakpoint; we want to |
| hit them when we leave scope so we can delete both the |
| watchpoint and its scope breakpoint at that time. */ |
| if (bpt->type == bp_watchpoint_scope) |
| return; |
| |
| /* You can't disable permanent breakpoints. */ |
| if (bpt->enable_state == bp_permanent) |
| return; |
| |
| bpt->enable_state = bp_disabled; |
| |
| update_global_location_list (0); |
| |
| observer_notify_breakpoint_modified (bpt->number); |
| } |
| |
| static void |
| disable_command (char *args, int from_tty) |
| { |
| struct breakpoint *bpt; |
| if (args == 0) |
| ALL_BREAKPOINTS (bpt) |
| switch (bpt->type) |
| { |
| case bp_none: |
| warning (_("attempted to disable apparently deleted breakpoint #%d?"), |
| bpt->number); |
| continue; |
| case bp_breakpoint: |
| case bp_catchpoint: |
| case bp_hardware_breakpoint: |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| disable_breakpoint (bpt); |
| default: |
| continue; |
| } |
| else if (strchr (args, '.')) |
| { |
| struct bp_location *loc = find_location_by_number (args); |
| if (loc) |
| loc->enabled = 0; |
| update_global_location_list (0); |
| } |
| else |
| map_breakpoint_numbers (args, disable_breakpoint); |
| } |
| |
| static void |
| do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition) |
| { |
| int target_resources_ok, other_type_used; |
| struct value *mark; |
| |
| if (bpt->type == bp_hardware_breakpoint) |
| { |
| int i; |
| i = hw_breakpoint_used_count (); |
| target_resources_ok = |
| TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint, |
| i + 1, 0); |
| if (target_resources_ok == 0) |
| error (_("No hardware breakpoint support in the target.")); |
| else if (target_resources_ok < 0) |
| error (_("Hardware breakpoints used exceeds limit.")); |
| } |
| |
| if (bpt->type == bp_watchpoint || |
| bpt->type == bp_hardware_watchpoint || |
| bpt->type == bp_read_watchpoint || |
| bpt->type == bp_access_watchpoint) |
| { |
| struct gdb_exception e; |
| |
| TRY_CATCH (e, RETURN_MASK_ALL) |
| { |
| update_watchpoint (bpt, 1 /* reparse */); |
| } |
| if (e.reason < 0) |
| { |
| exception_fprintf (gdb_stderr, e, _("Cannot enable watchpoint %d: "), |
| bpt->number); |
| return; |
| } |
| } |
| |
| if (bpt->enable_state != bp_permanent) |
| bpt->enable_state = bp_enabled; |
| bpt->disposition = disposition; |
| update_global_location_list (1); |
| breakpoints_changed (); |
| |
| observer_notify_breakpoint_modified (bpt->number); |
| } |
| |
| |
| void |
| enable_breakpoint (struct breakpoint *bpt) |
| { |
| do_enable_breakpoint (bpt, bpt->disposition); |
| } |
| |
| /* The enable command enables the specified breakpoints (or all defined |
| breakpoints) so they once again become (or continue to be) effective |
| in stopping the inferior. */ |
| |
| static void |
| enable_command (char *args, int from_tty) |
| { |
| struct breakpoint *bpt; |
| if (args == 0) |
| ALL_BREAKPOINTS (bpt) |
| switch (bpt->type) |
| { |
| case bp_none: |
| warning (_("attempted to enable apparently deleted breakpoint #%d?"), |
| bpt->number); |
| continue; |
| case bp_breakpoint: |
| case bp_catchpoint: |
| case bp_hardware_breakpoint: |
| case bp_watchpoint: |
| case bp_hardware_watchpoint: |
| case bp_read_watchpoint: |
| case bp_access_watchpoint: |
| enable_breakpoint (bpt); |
| default: |
| continue; |
| } |
| else if (strchr (args, '.')) |
| { |
| struct bp_location *loc = find_location_by_number (args); |
| if (loc) |
| loc->enabled = 1; |
| update_global_location_list (1); |
| } |
| else |
| map_breakpoint_numbers (args, enable_breakpoint); |
| } |
| |
| static void |
| enable_once_breakpoint (struct breakpoint *bpt) |
| { |
| do_enable_breakpoint (bpt, disp_disable); |
| } |
| |
| static void |
| enable_once_command (char *args, int from_tty) |
| { |
| map_breakpoint_numbers (args, enable_once_breakpoint); |
| } |
| |
| static void |
| enable_delete_breakpoint (struct breakpoint *bpt) |
| { |
| do_enable_breakpoint (bpt, disp_del); |
| } |
| |
| static void |
| enable_delete_command (char *args, int from_tty) |
| { |
| map_breakpoint_numbers (args, enable_delete_breakpoint); |
| } |
| |
| static void |
| set_breakpoint_cmd (char *args, int from_tty) |
| { |
| } |
| |
| static void |
| show_breakpoint_cmd (char *args, int from_tty) |
| { |
| } |
| |
| /* Use default_breakpoint_'s, or nothing if they aren't valid. */ |
| |
| struct symtabs_and_lines |
| decode_line_spec_1 (char *string, int funfirstline) |
| { |
| struct symtabs_and_lines sals; |
| if (string == 0) |
| error (_("Empty line specification.")); |
| if (default_breakpoint_valid) |
| sals = decode_line_1 (&string, funfirstline, |
| default_breakpoint_symtab, |
| default_breakpoint_line, |
| (char ***) NULL, NULL); |
| else |
| sals = decode_line_1 (&string, funfirstline, |
| (struct symtab *) NULL, 0, (char ***) NULL, NULL); |
| if (*string) |
| error (_("Junk at end of line specification: %s"), string); |
| return sals; |
| } |
| |
| /* Create and insert a raw software breakpoint at PC. Return an |
| identifier, which should be used to remove the breakpoint later. |
| In general, places which call this should be using something on the |
| breakpoint chain instead; this function should be eliminated |
| someday. */ |
| |
| void * |
| deprecated_insert_raw_breakpoint (CORE_ADDR pc) |
| { |
| struct bp_target_info *bp_tgt; |
| |
| bp_tgt = xmalloc (sizeof (struct bp_target_info)); |
| memset (bp_tgt, 0, sizeof (struct bp_target_info)); |
| |
| bp_tgt->placed_address = pc; |
| if (target_insert_breakpoint (bp_tgt) != 0) |
| { |
| /* Could not insert the breakpoint. */ |
| xfree (bp_tgt); |
| return NULL; |
| } |
| |
| return bp_tgt; |
| } |
| |
| /* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */ |
| |
| int |
| deprecated_remove_raw_breakpoint (void *bp) |
| { |
| struct bp_target_info *bp_tgt = bp; |
| int ret; |
| |
| ret = target_remove_breakpoint (bp_tgt); |
| xfree (bp_tgt); |
| |
| return ret; |
| } |
| |
| /* One (or perhaps two) breakpoints used for software single stepping. */ |
| |
| static void *single_step_breakpoints[2]; |
| |
| /* Create and insert a breakpoint for software single step. */ |
| |
| void |
| insert_single_step_breakpoint (CORE_ADDR next_pc) |
| { |
| void **bpt_p; |
| |
| if (single_step_breakpoints[0] == NULL) |
| bpt_p = &single_step_breakpoints[0]; |
| else |
| { |
| gdb_assert (single_step_breakpoints[1] == NULL); |
| bpt_p = &single_step_breakpoints[1]; |
| } |
| |
| /* NOTE drow/2006-04-11: A future improvement to this function would be |
| to only create the breakpoints once, and actually put them on the |
| breakpoint chain. That would let us use set_raw_breakpoint. We could |
| adjust the addresses each time they were needed. Doing this requires |
| corresponding changes elsewhere where single step breakpoints are |
| handled, however. So, for now, we use this. */ |
| |
| *bpt_p = deprecated_insert_raw_breakpoint (next_pc); |
| if (*bpt_p == NULL) |
| error (_("Could not insert single-step breakpoint at 0x%s"), |
| paddr_nz (next_pc)); |
| } |
| |
| /* Remove and delete any breakpoints used for software single step. */ |
| |
| void |
| remove_single_step_breakpoints (void) |
| { |
| gdb_assert (single_step_breakpoints[0] != NULL); |
| |
| /* See insert_single_step_breakpoint for more about this deprecated |
| call. */ |
| deprecated_remove_raw_breakpoint (single_step_breakpoints[0]); |
| single_step_breakpoints[0] = NULL; |
| |
| if (single_step_breakpoints[1] != NULL) |
| { |
| deprecated_remove_raw_breakpoint (single_step_breakpoints[1]); |
| single_step_breakpoints[1] = NULL; |
| } |
| } |
| |
| /* Check whether a software single-step breakpoint is inserted at PC. */ |
| |
| static int |
| single_step_breakpoint_inserted_here_p (CORE_ADDR pc) |
| { |
| int i; |
| |
| for (i = 0; i < 2; i++) |
| { |
| struct bp_target_info *bp_tgt = single_step_breakpoints[i]; |
| if (bp_tgt && bp_tgt->placed_address == pc) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* This help string is used for the break, hbreak, tbreak and thbreak commands. |
| It is defined as a macro to prevent duplication. |
| COMMAND should be a string constant containing the name of the command. */ |
| #define BREAK_ARGS_HELP(command) \ |
| command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\ |
| LOCATION may be a line number, function name, or \"*\" and an address.\n\ |
| If a line number is specified, break at start of code for that line.\n\ |
| If a function is specified, break at start of code for that function.\n\ |
| If an address is specified, break at that exact address.\n\ |
| With no LOCATION, uses current execution address of selected stack frame.\n\ |
| This is useful for breaking on return to a stack frame.\n\ |
| \n\ |
| THREADNUM is the number from \"info threads\".\n\ |
| CONDITION is a boolean expression.\n\ |
| \n\ |
| Multiple breakpoints at one place are permitted, and useful if conditional.\n\ |
| \n\ |
| Do \"help breakpoints\" for info on other commands dealing with breakpoints." |
| |
| /* List of subcommands for "catch". */ |
| static struct cmd_list_element *catch_cmdlist; |
| |
| /* List of subcommands for "tcatch". */ |
| static struct cmd_list_element *tcatch_cmdlist; |
| |
| /* Like add_cmd, but add the command to both the "catch" and "tcatch" |
| lists, and pass some additional user data to the command function. */ |
| static void |
| add_catch_command (char *name, char *docstring, |
| void (*sfunc) (char *args, int from_tty, |
| struct cmd_list_element *command), |
| void *user_data_catch, |
| void *user_data_tcatch) |
| { |
| struct cmd_list_element *command; |
| |
| command = add_cmd (name, class_breakpoint, NULL, docstring, |
| &catch_cmdlist); |
| set_cmd_sfunc (command, sfunc); |
| set_cmd_context (command, user_data_catch); |
| |
| command = add_cmd (name, class_breakpoint, NULL, docstring, |
| &tcatch_cmdlist); |
| set_cmd_sfunc (command, sfunc); |
| set_cmd_context (command, user_data_tcatch); |
| } |
| |
| void |
| _initialize_breakpoint (void) |
| { |
| static struct cmd_list_element *breakpoint_set_cmdlist; |
| static struct cmd_list_element *breakpoint_show_cmdlist; |
| struct cmd_list_element *c; |
| |
| observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib); |
| |
| breakpoint_chain = 0; |
| /* Don't bother to call set_breakpoint_count. $bpnum isn't useful |
| before a breakpoint is set. */ |
| breakpoint_count = 0; |
| |
| add_com ("ignore", class_breakpoint, ignore_command, _("\ |
| Set ignore-count of breakpoint number N to COUNT.\n\ |
| Usage is `ignore N COUNT'.")); |
| if (xdb_commands) |
| add_com_alias ("bc", "ignore", class_breakpoint, 1); |
| |
| add_com ("commands", class_breakpoint, commands_command, _("\ |
| Set commands to be executed when a breakpoint is hit.\n\ |
| Give breakpoint number as argument after \"commands\".\n\ |
| With no argument, the targeted breakpoint is the last one set.\n\ |
| The commands themselves follow starting on the next line.\n\ |
| Type a line containing \"end\" to indicate the end of them.\n\ |
| Give \"silent\" as the first line to make the breakpoint silent;\n\ |
| then no output is printed when it is hit, except what the commands print.")); |
| |
| add_com ("condition", class_breakpoint, condition_command, _("\ |
| Specify breakpoint number N to break only if COND is true.\n\ |
| Usage is `condition N COND', where N is an integer and COND is an\n\ |
| expression to be evaluated whenever breakpoint N is reached.")); |
| |
| c = add_com ("tbreak", class_breakpoint, tbreak_command, _("\ |
| Set a temporary breakpoint.\n\ |
| Like \"break\" except the breakpoint is only temporary,\n\ |
| so it will be deleted when hit. Equivalent to \"break\" followed\n\ |
| by using \"enable delete\" on the breakpoint number.\n\ |
| \n" |
| BREAK_ARGS_HELP ("tbreak"))); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("hbreak", class_breakpoint, hbreak_command, _("\ |
| Set a hardware assisted breakpoint.\n\ |
| Like \"break\" except the breakpoint requires hardware support,\n\ |
| some target hardware may not have this support.\n\ |
| \n" |
| BREAK_ARGS_HELP ("hbreak"))); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("thbreak", class_breakpoint, thbreak_command, _("\ |
| Set a temporary hardware assisted breakpoint.\n\ |
| Like \"hbreak\" except the breakpoint is only temporary,\n\ |
| so it will be deleted when hit.\n\ |
| \n" |
| BREAK_ARGS_HELP ("thbreak"))); |
| set_cmd_completer (c, location_completer); |
| |
| add_prefix_cmd ("enable", class_breakpoint, enable_command, _("\ |
| Enable some breakpoints.\n\ |
| Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| This is used to cancel the effect of the \"disable\" command.\n\ |
| With a subcommand you can enable temporarily."), |
| &enablelist, "enable ", 1, &cmdlist); |
| if (xdb_commands) |
| add_com ("ab", class_breakpoint, enable_command, _("\ |
| Enable some breakpoints.\n\ |
| Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| This is used to cancel the effect of the \"disable\" command.\n\ |
| With a subcommand you can enable temporarily.")); |
| |
| add_com_alias ("en", "enable", class_breakpoint, 1); |
| |
| add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\ |
| Enable some breakpoints.\n\ |
| Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| This is used to cancel the effect of the \"disable\" command.\n\ |
| May be abbreviated to simply \"enable\".\n"), |
| &enablebreaklist, "enable breakpoints ", 1, &enablelist); |
| |
| add_cmd ("once", no_class, enable_once_command, _("\ |
| Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it becomes disabled."), |
| &enablebreaklist); |
| |
| add_cmd ("delete", no_class, enable_delete_command, _("\ |
| Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it is deleted."), |
| &enablebreaklist); |
| |
| add_cmd ("delete", no_class, enable_delete_command, _("\ |
| Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it is deleted."), |
| &enablelist); |
| |
| add_cmd ("once", no_class, enable_once_command, _("\ |
| Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| If a breakpoint is hit while enabled in this fashion, it becomes disabled."), |
| &enablelist); |
| |
| add_prefix_cmd ("disable", class_breakpoint, disable_command, _("\ |
| Disable some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To disable all breakpoints, give no argument.\n\ |
| A disabled breakpoint is not forgotten, but has no effect until reenabled."), |
| &disablelist, "disable ", 1, &cmdlist); |
| add_com_alias ("dis", "disable", class_breakpoint, 1); |
| add_com_alias ("disa", "disable", class_breakpoint, 1); |
| if (xdb_commands) |
| add_com ("sb", class_breakpoint, disable_command, _("\ |
| Disable some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To disable all breakpoints, give no argument.\n\ |
| A disabled breakpoint is not forgotten, but has no effect until reenabled.")); |
| |
| add_cmd ("breakpoints", class_alias, disable_command, _("\ |
| Disable some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To disable all breakpoints, give no argument.\n\ |
| A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ |
| This command may be abbreviated \"disable\"."), |
| &disablelist); |
| |
| add_prefix_cmd ("delete", class_breakpoint, delete_command, _("\ |
| Delete some breakpoints or auto-display expressions.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To delete all breakpoints, give no argument.\n\ |
| \n\ |
| Also a prefix command for deletion of other GDB objects.\n\ |
| The \"unset\" command is also an alias for \"delete\"."), |
| &deletelist, "delete ", 1, &cmdlist); |
| add_com_alias ("d", "delete", class_breakpoint, 1); |
| add_com_alias ("del", "delete", class_breakpoint, 1); |
| if (xdb_commands) |
| add_com ("db", class_breakpoint, delete_command, _("\ |
| Delete some breakpoints.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To delete all breakpoints, give no argument.\n")); |
| |
| add_cmd ("breakpoints", class_alias, delete_command, _("\ |
| Delete some breakpoints or auto-display expressions.\n\ |
| Arguments are breakpoint numbers with spaces in between.\n\ |
| To delete all breakpoints, give no argument.\n\ |
| This command may be abbreviated \"delete\"."), |
| &deletelist); |
| |
| add_com ("clear", class_breakpoint, clear_command, _("\ |
| Clear breakpoint at specified line or function.\n\ |
| Argument may be line number, function name, or \"*\" and an address.\n\ |
| If line number is specified, all breakpoints in that line are cleared.\n\ |
| If function is specified, breakpoints at beginning of function are cleared.\n\ |
| If an address is specified, breakpoints at that address are cleared.\n\ |
| \n\ |
| With no argument, clears all breakpoints in the line that the selected frame\n\ |
| is executing in.\n\ |
| \n\ |
| See also the \"delete\" command which clears breakpoints by number.")); |
| |
| c = add_com ("break", class_breakpoint, break_command, _("\ |
| Set breakpoint at specified line or function.\n" |
| BREAK_ARGS_HELP ("break"))); |
| set_cmd_completer (c, location_completer); |
| |
| add_com_alias ("b", "break", class_run, 1); |
| add_com_alias ("br", "break", class_run, 1); |
| add_com_alias ("bre", "break", class_run, 1); |
| add_com_alias ("brea", "break", class_run, 1); |
| |
| if (xdb_commands) |
| { |
| add_com_alias ("ba", "break", class_breakpoint, 1); |
| add_com_alias ("bu", "ubreak", class_breakpoint, 1); |
| } |
| |
| if (dbx_commands) |
| { |
| add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, _("\ |
| Break in function/address or break at a line in the current file."), |
| &stoplist, "stop ", 1, &cmdlist); |
| add_cmd ("in", class_breakpoint, stopin_command, |
| _("Break in function or address."), &stoplist); |
| add_cmd ("at", class_breakpoint, stopat_command, |
| _("Break at a line in the current file."), &stoplist); |
| add_com ("status", class_info, breakpoints_info, _("\ |
| Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\ |
| \n\ |
| Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed unless the command\n\ |
| is prefixed with \"server \".\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.")); |
| } |
| |
| add_info ("breakpoints", breakpoints_info, _("\ |
| Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\ |
| \n\ |
| Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed unless the command\n\ |
| is prefixed with \"server \".\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.")); |
| |
| if (xdb_commands) |
| add_com ("lb", class_breakpoint, breakpoints_info, _("\ |
| Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\ |
| \n\ |
| Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed unless the command\n\ |
| is prefixed with \"server \".\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set.")); |
| |
| add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, _("\ |
| Status of all breakpoints, or breakpoint number NUMBER.\n\ |
| The \"Type\" column indicates one of:\n\ |
| \tbreakpoint - normal breakpoint\n\ |
| \twatchpoint - watchpoint\n\ |
| \tlongjmp - internal breakpoint used to step through longjmp()\n\ |
| \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ |
| \tuntil - internal breakpoint used by the \"until\" command\n\ |
| \tfinish - internal breakpoint used by the \"finish\" command\n\ |
| The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| address and file/line number respectively.\n\ |
| \n\ |
| Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| are set to the address of the last breakpoint listed unless the command\n\ |
| is prefixed with \"server \".\n\n\ |
| Convenience variable \"$bpnum\" contains the number of the last\n\ |
| breakpoint set."), |
| &maintenanceinfolist); |
| |
| add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\ |
| Set catchpoints to catch events."), |
| &catch_cmdlist, "catch ", |
| 0/*allow-unknown*/, &cmdlist); |
| |
| add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\ |
| Set temporary catchpoints to catch events."), |
| &tcatch_cmdlist, "tcatch ", |
| 0/*allow-unknown*/, &cmdlist); |
| |
| /* Add catch and tcatch sub-commands. */ |
| add_catch_command ("catch", _("\ |
| Catch an exception, when caught.\n\ |
| With an argument, catch only exceptions with the given name."), |
| catch_catch_command, |
| CATCH_PERMANENT, |
| CATCH_TEMPORARY); |
| add_catch_command ("throw", _("\ |
| Catch an exception, when thrown.\n\ |
| With an argument, catch only exceptions with the given name."), |
| catch_throw_command, |
| CATCH_PERMANENT, |
| CATCH_TEMPORARY); |
| add_catch_command ("fork", _("Catch calls to fork."), |
| catch_fork_command_1, |
| (void *) (uintptr_t) catch_fork_permanent, |
| (void *) (uintptr_t) catch_fork_temporary); |
| add_catch_command ("vfork", _("Catch calls to vfork."), |
| catch_fork_command_1, |
| (void *) (uintptr_t) catch_vfork_permanent, |
| (void *) (uintptr_t) catch_vfork_temporary); |
| add_catch_command ("exec", _("Catch calls to exec."), |
| catch_exec_command_1, |
| CATCH_PERMANENT, |
| CATCH_TEMPORARY); |
| add_catch_command ("exception", _("\ |
| Catch Ada exceptions, when raised.\n\ |
| With an argument, catch only exceptions with the given name."), |
| catch_ada_exception_command, |
| CATCH_PERMANENT, |
| CATCH_TEMPORARY); |
| add_catch_command ("assert", _("\ |
| Catch failed Ada assertions, when raised.\n\ |
| With an argument, catch only exceptions with the given name."), |
| catch_assert_command, |
| CATCH_PERMANENT, |
| CATCH_TEMPORARY); |
| |
| c = add_com ("watch", class_breakpoint, watch_command, _("\ |
| Set a watchpoint for an expression.\n\ |
| A watchpoint stops execution of your program whenever the value of\n\ |
| an expression changes.")); |
| set_cmd_completer (c, expression_completer); |
| |
| c = add_com ("rwatch", class_breakpoint, rwatch_command, _("\ |
| Set a read watchpoint for an expression.\n\ |
| A watchpoint stops execution of your program whenever the value of\n\ |
| an expression is read.")); |
| set_cmd_completer (c, expression_completer); |
| |
| c = add_com ("awatch", class_breakpoint, awatch_command, _("\ |
| Set a watchpoint for an expression.\n\ |
| A watchpoint stops execution of your program whenever the value of\n\ |
| an expression is either read or written.")); |
| set_cmd_completer (c, expression_completer); |
| |
| add_info ("watchpoints", breakpoints_info, |
| _("Synonym for ``info breakpoints''.")); |
| |
| |
| /* XXX: cagney/2005-02-23: This should be a boolean, and should |
| respond to changes - contrary to the description. */ |
| add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support, |
| &can_use_hw_watchpoints, _("\ |
| Set debugger's willingness to use watchpoint hardware."), _("\ |
| Show debugger's willingness to use watchpoint hardware."), _("\ |
| If zero, gdb will not use hardware for new watchpoints, even if\n\ |
| such is available. (However, any hardware watchpoints that were\n\ |
| created before setting this to nonzero, will continue to use watchpoint\n\ |
| hardware.)"), |
| NULL, |
| show_can_use_hw_watchpoints, |
| &setlist, &showlist); |
| |
| can_use_hw_watchpoints = 1; |
| |
| add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, _("\ |
| Breakpoint specific settings\n\ |
| Configure various breakpoint-specific variables such as\n\ |
| pending breakpoint behavior"), |
| &breakpoint_set_cmdlist, "set breakpoint ", |
| 0/*allow-unknown*/, &setlist); |
| add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, _("\ |
| Breakpoint specific settings\n\ |
| Configure various breakpoint-specific variables such as\n\ |
| pending breakpoint behavior"), |
| &breakpoint_show_cmdlist, "show breakpoint ", |
| 0/*allow-unknown*/, &showlist); |
| |
| add_setshow_auto_boolean_cmd ("pending", no_class, |
| &pending_break_support, _("\ |
| Set debugger's behavior regarding pending breakpoints."), _("\ |
| Show debugger's behavior regarding pending breakpoints."), _("\ |
| If on, an unrecognized breakpoint location will cause gdb to create a\n\ |
| pending breakpoint. If off, an unrecognized breakpoint location results in\n\ |
| an error. If auto, an unrecognized breakpoint location results in a\n\ |
| user-query to see if a pending breakpoint should be created."), |
| NULL, |
| show_pending_break_support, |
| &breakpoint_set_cmdlist, |
| &breakpoint_show_cmdlist); |
| |
| pending_break_support = AUTO_BOOLEAN_AUTO; |
| |
| add_setshow_boolean_cmd ("auto-hw", no_class, |
| &automatic_hardware_breakpoints, _("\ |
| Set automatic usage of hardware breakpoints."), _("\ |
| Show automatic usage of hardware breakpoints."), _("\ |
| If set, the debugger will automatically use hardware breakpoints for\n\ |
| breakpoints set with \"break\" but falling in read-only memory. If not set,\n\ |
| a warning will be emitted for such breakpoints."), |
| NULL, |
| show_automatic_hardware_breakpoints, |
| &breakpoint_set_cmdlist, |
| &breakpoint_show_cmdlist); |
| |
| add_setshow_enum_cmd ("always-inserted", class_support, |
| always_inserted_enums, &always_inserted_mode, _("\ |
| Set mode for inserting breakpoints."), _("\ |
| Show mode for inserting breakpoints."), _("\ |
| When this mode is off, breakpoints are inserted in inferior when it is\n\ |
| resumed, and removed when execution stops. When this mode is on,\n\ |
| breakpoints are inserted immediately and removed only when the user\n\ |
| deletes the breakpoint. When this mode is auto (which is the default),\n\ |
| the behaviour depends on the non-stop setting (see help set non-stop).\n\ |
| In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\ |
| behaves as if always-inserted mode is on; if gdb is controlling the\n\ |
| inferior in all-stop mode, gdb behaves as if always-inserted mode is off."), |
| NULL, |
| &show_always_inserted_mode, |
| &breakpoint_set_cmdlist, |
| &breakpoint_show_cmdlist); |
| |
| automatic_hardware_breakpoints = 1; |
| } |