| /* Print and select stack frames for GDB, the GNU debugger. |
| |
| Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 |
| 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 "value.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "language.h" |
| #include "frame.h" |
| #include "gdbcmd.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| #include "source.h" |
| #include "breakpoint.h" |
| #include "demangle.h" |
| #include "inferior.h" |
| #include "annotate.h" |
| #include "ui-out.h" |
| #include "block.h" |
| #include "stack.h" |
| #include "dictionary.h" |
| #include "exceptions.h" |
| #include "reggroups.h" |
| #include "regcache.h" |
| #include "solib.h" |
| #include "valprint.h" |
| |
| #include "gdb_assert.h" |
| #include <ctype.h> |
| #include "gdb_string.h" |
| |
| void (*deprecated_selected_frame_level_changed_hook) (int); |
| |
| /* The possible choices of "set print frame-arguments, and the value |
| of this setting. */ |
| |
| static const char *print_frame_arguments_choices[] = |
| {"all", "scalars", "none", NULL}; |
| static const char *print_frame_arguments = "all"; |
| |
| /* Prototypes for local functions. */ |
| |
| static void print_frame_local_vars (struct frame_info *, int, |
| struct ui_file *); |
| |
| static void print_frame (struct frame_info *frame, int print_level, |
| enum print_what print_what, int print_args, |
| struct symtab_and_line sal); |
| |
| /* Zero means do things normally; we are interacting directly with the |
| user. One means print the full filename and linenumber when a |
| frame is printed, and do so in a format emacs18/emacs19.22 can |
| parse. Two means print similar annotations, but in many more |
| cases and in a slightly different syntax. */ |
| |
| int annotation_level = 0; |
| |
| |
| struct print_stack_frame_args |
| { |
| struct frame_info *frame; |
| int print_level; |
| enum print_what print_what; |
| int print_args; |
| }; |
| |
| /* Show or print the frame arguments; stub for catch_errors. */ |
| |
| static int |
| print_stack_frame_stub (void *args) |
| { |
| struct print_stack_frame_args *p = args; |
| int center = (p->print_what == SRC_LINE || p->print_what == SRC_AND_LOC); |
| |
| print_frame_info (p->frame, p->print_level, p->print_what, p->print_args); |
| set_current_sal_from_frame (p->frame, center); |
| return 0; |
| } |
| |
| /* Show or print a stack frame FRAME briefly. The output is format |
| according to PRINT_LEVEL and PRINT_WHAT printing the frame's |
| relative level, function name, argument list, and file name and |
| line number. If the frame's PC is not at the beginning of the |
| source line, the actual PC is printed at the beginning. */ |
| |
| void |
| print_stack_frame (struct frame_info *frame, int print_level, |
| enum print_what print_what) |
| { |
| struct print_stack_frame_args args; |
| |
| args.frame = frame; |
| args.print_level = print_level; |
| args.print_what = print_what; |
| /* For mi, alway print location and address. */ |
| args.print_what = ui_out_is_mi_like_p (uiout) ? LOC_AND_ADDRESS : print_what; |
| args.print_args = 1; |
| |
| catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ERROR); |
| } |
| |
| struct print_args_args |
| { |
| struct symbol *func; |
| struct frame_info *frame; |
| struct ui_file *stream; |
| }; |
| |
| static int print_args_stub (void *args); |
| |
| /* Print nameless arguments of frame FRAME on STREAM, where START is |
| the offset of the first nameless argument, and NUM is the number of |
| nameless arguments to print. FIRST is nonzero if this is the first |
| argument (not just the first nameless argument). */ |
| |
| static void |
| print_frame_nameless_args (struct frame_info *frame, long start, int num, |
| int first, struct ui_file *stream) |
| { |
| int i; |
| CORE_ADDR argsaddr; |
| long arg_value; |
| |
| for (i = 0; i < num; i++) |
| { |
| QUIT; |
| argsaddr = get_frame_args_address (frame); |
| if (!argsaddr) |
| return; |
| arg_value = read_memory_integer (argsaddr + start, sizeof (int)); |
| if (!first) |
| fprintf_filtered (stream, ", "); |
| fprintf_filtered (stream, "%ld", arg_value); |
| first = 0; |
| start += sizeof (int); |
| } |
| } |
| |
| /* Return non-zero if the debugger should print the value of the provided |
| symbol parameter (SYM). */ |
| |
| static int |
| print_this_frame_argument_p (struct symbol *sym) |
| { |
| struct type *type; |
| |
| /* If the user asked to print no argument at all, then obviously |
| do not print this argument. */ |
| |
| if (strcmp (print_frame_arguments, "none") == 0) |
| return 0; |
| |
| /* If the user asked to print all arguments, then we should print |
| that one. */ |
| |
| if (strcmp (print_frame_arguments, "all") == 0) |
| return 1; |
| |
| /* The user asked to print only the scalar arguments, so do not |
| print the non-scalar ones. */ |
| |
| type = CHECK_TYPEDEF (SYMBOL_TYPE (sym)); |
| while (TYPE_CODE (type) == TYPE_CODE_REF) |
| type = CHECK_TYPEDEF (TYPE_TARGET_TYPE (type)); |
| switch (TYPE_CODE (type)) |
| { |
| case TYPE_CODE_ARRAY: |
| case TYPE_CODE_STRUCT: |
| case TYPE_CODE_UNION: |
| case TYPE_CODE_SET: |
| case TYPE_CODE_STRING: |
| case TYPE_CODE_BITSTRING: |
| return 0; |
| default: |
| return 1; |
| } |
| } |
| |
| /* Print the arguments of frame FRAME on STREAM, given the function |
| FUNC running in that frame (as a symbol), where NUM is the number |
| of arguments according to the stack frame (or -1 if the number of |
| arguments is unknown). */ |
| |
| /* Note that currently the "number of argumentss according to the |
| stack frame" is only known on VAX where i refers to the "number of |
| ints of argumentss according to the stack frame". */ |
| |
| static void |
| print_frame_args (struct symbol *func, struct frame_info *frame, |
| int num, struct ui_file *stream) |
| { |
| int first = 1; |
| /* Offset of next stack argument beyond the one we have seen that is |
| at the highest offset, or -1 if we haven't come to a stack |
| argument yet. */ |
| long highest_offset = -1; |
| /* Number of ints of arguments that we have printed so far. */ |
| int args_printed = 0; |
| struct cleanup *old_chain, *list_chain; |
| struct ui_stream *stb; |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| if (func) |
| { |
| struct block *b = SYMBOL_BLOCK_VALUE (func); |
| struct dict_iterator iter; |
| struct symbol *sym; |
| struct value *val; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| QUIT; |
| |
| /* Keep track of the highest stack argument offset seen, and |
| skip over any kinds of symbols we don't care about. */ |
| |
| if (!SYMBOL_IS_ARGUMENT (sym)) |
| continue; |
| |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_ARG: |
| case LOC_REF_ARG: |
| { |
| long current_offset = SYMBOL_VALUE (sym); |
| int arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); |
| |
| /* Compute address of next argument by adding the size of |
| this argument and rounding to an int boundary. */ |
| current_offset = |
| ((current_offset + arg_size + sizeof (int) - 1) |
| & ~(sizeof (int) - 1)); |
| |
| /* If this is the highest offset seen yet, set |
| highest_offset. */ |
| if (highest_offset == -1 |
| || (current_offset > highest_offset)) |
| highest_offset = current_offset; |
| |
| /* Add the number of ints we're about to print to |
| args_printed. */ |
| args_printed += (arg_size + sizeof (int) - 1) / sizeof (int); |
| } |
| |
| /* We care about types of symbols, but don't need to |
| keep track of stack offsets in them. */ |
| case LOC_REGISTER: |
| case LOC_REGPARM_ADDR: |
| case LOC_COMPUTED: |
| case LOC_OPTIMIZED_OUT: |
| default: |
| break; |
| } |
| |
| /* We have to look up the symbol because arguments can have |
| two entries (one a parameter, one a local) and the one we |
| want is the local, which lookup_symbol will find for us. |
| This includes gcc1 (not gcc2) on SPARC when passing a |
| small structure and gcc2 when the argument type is float |
| and it is passed as a double and converted to float by |
| the prologue (in the latter case the type of the LOC_ARG |
| symbol is double and the type of the LOC_LOCAL symbol is |
| float). */ |
| /* But if the parameter name is null, don't try it. Null |
| parameter names occur on the RS/6000, for traceback |
| tables. FIXME, should we even print them? */ |
| |
| if (*DEPRECATED_SYMBOL_NAME (sym)) |
| { |
| struct symbol *nsym; |
| nsym = lookup_symbol (DEPRECATED_SYMBOL_NAME (sym), |
| b, VAR_DOMAIN, NULL); |
| gdb_assert (nsym != NULL); |
| if (SYMBOL_CLASS (nsym) == LOC_REGISTER |
| && !SYMBOL_IS_ARGUMENT (nsym)) |
| { |
| /* There is a LOC_ARG/LOC_REGISTER pair. This means |
| that it was passed on the stack and loaded into a |
| register, or passed in a register and stored in a |
| stack slot. GDB 3.x used the LOC_ARG; GDB |
| 4.0-4.11 used the LOC_REGISTER. |
| |
| Reasons for using the LOC_ARG: |
| |
| (1) Because find_saved_registers may be slow for |
| remote debugging. |
| |
| (2) Because registers are often re-used and stack |
| slots rarely (never?) are. Therefore using |
| the stack slot is much less likely to print |
| garbage. |
| |
| Reasons why we might want to use the LOC_REGISTER: |
| |
| (1) So that the backtrace prints the same value |
| as "print foo". I see no compelling reason |
| why this needs to be the case; having the |
| backtrace print the value which was passed |
| in, and "print foo" print the value as |
| modified within the called function, makes |
| perfect sense to me. |
| |
| Additional note: It might be nice if "info args" |
| displayed both values. |
| |
| One more note: There is a case with SPARC |
| structure passing where we need to use the |
| LOC_REGISTER, but this is dealt with by creating |
| a single LOC_REGPARM in symbol reading. */ |
| |
| /* Leave sym (the LOC_ARG) alone. */ |
| ; |
| } |
| else |
| sym = nsym; |
| } |
| |
| /* Print the current arg. */ |
| if (!first) |
| ui_out_text (uiout, ", "); |
| ui_out_wrap_hint (uiout, " "); |
| |
| annotate_arg_begin (); |
| |
| list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| fprintf_symbol_filtered (stb->stream, SYMBOL_PRINT_NAME (sym), |
| SYMBOL_LANGUAGE (sym), |
| DMGL_PARAMS | DMGL_ANSI); |
| ui_out_field_stream (uiout, "name", stb); |
| annotate_arg_name_end (); |
| ui_out_text (uiout, "="); |
| |
| if (print_this_frame_argument_p (sym)) |
| { |
| /* Avoid value_print because it will deref ref parameters. |
| We just want to print their addresses. Print ??? for |
| args whose address we do not know. We pass 2 as |
| "recurse" to val_print because our standard indentation |
| here is 4 spaces, and val_print indents 2 for each |
| recurse. */ |
| val = read_var_value (sym, frame); |
| |
| annotate_arg_value (val == NULL ? NULL : value_type (val)); |
| |
| if (val) |
| { |
| const struct language_defn *language; |
| |
| /* Use the appropriate language to display our symbol, |
| unless the user forced the language to a specific |
| language. */ |
| if (language_mode == language_mode_auto) |
| language = language_def (SYMBOL_LANGUAGE (sym)); |
| else |
| language = current_language; |
| |
| common_val_print (val, stb->stream, 0, 0, 2, |
| Val_no_prettyprint, language); |
| ui_out_field_stream (uiout, "value", stb); |
| } |
| else |
| ui_out_text (uiout, "???"); |
| } |
| else |
| ui_out_text (uiout, "..."); |
| |
| |
| /* Invoke ui_out_tuple_end. */ |
| do_cleanups (list_chain); |
| |
| annotate_arg_end (); |
| |
| first = 0; |
| } |
| } |
| |
| /* Don't print nameless args in situations where we don't know |
| enough about the stack to find them. */ |
| if (num != -1) |
| { |
| long start; |
| |
| if (highest_offset == -1) |
| start = gdbarch_frame_args_skip (get_frame_arch (frame)); |
| else |
| start = highest_offset; |
| |
| print_frame_nameless_args (frame, start, num - args_printed, |
| first, stream); |
| } |
| |
| do_cleanups (old_chain); |
| } |
| |
| /* Stub for catch_errors. */ |
| |
| static int |
| print_args_stub (void *args) |
| { |
| struct print_args_args *p = args; |
| struct gdbarch *gdbarch = get_frame_arch (p->frame); |
| int numargs; |
| |
| if (gdbarch_frame_num_args_p (gdbarch)) |
| { |
| numargs = gdbarch_frame_num_args (gdbarch, p->frame); |
| gdb_assert (numargs >= 0); |
| } |
| else |
| numargs = -1; |
| print_frame_args (p->func, p->frame, numargs, p->stream); |
| return 0; |
| } |
| |
| /* Set the current source and line to the location given by frame |
| FRAME, if possible. When CENTER is true, adjust so the relevant |
| line is in the center of the next 'list'. */ |
| |
| void |
| set_current_sal_from_frame (struct frame_info *frame, int center) |
| { |
| struct symtab_and_line sal; |
| |
| find_frame_sal (frame, &sal); |
| if (sal.symtab) |
| { |
| if (center) |
| sal.line = max (sal.line - get_lines_to_list () / 2, 1); |
| set_current_source_symtab_and_line (&sal); |
| } |
| } |
| |
| /* Print information about frame FRAME. The output is format according |
| to PRINT_LEVEL and PRINT_WHAT and PRINT ARGS. The meaning of |
| PRINT_WHAT is: |
| |
| SRC_LINE: Print only source line. |
| LOCATION: Print only location. |
| LOC_AND_SRC: Print location and source line. |
| |
| Used in "where" output, and to emit breakpoint or step |
| messages. */ |
| |
| void |
| print_frame_info (struct frame_info *frame, int print_level, |
| enum print_what print_what, int print_args) |
| { |
| struct symtab_and_line sal; |
| int source_print; |
| int location_print; |
| |
| if (get_frame_type (frame) == DUMMY_FRAME |
| || get_frame_type (frame) == SIGTRAMP_FRAME) |
| { |
| struct cleanup *uiout_cleanup |
| = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| |
| annotate_frame_begin (print_level ? frame_relative_level (frame) : 0, |
| get_frame_pc (frame)); |
| |
| /* Do this regardless of SOURCE because we don't have any source |
| to list for this frame. */ |
| if (print_level) |
| { |
| ui_out_text (uiout, "#"); |
| ui_out_field_fmt_int (uiout, 2, ui_left, "level", |
| frame_relative_level (frame)); |
| } |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| annotate_frame_address (); |
| ui_out_field_core_addr (uiout, "addr", get_frame_pc (frame)); |
| annotate_frame_address_end (); |
| } |
| |
| if (get_frame_type (frame) == DUMMY_FRAME) |
| { |
| annotate_function_call (); |
| ui_out_field_string (uiout, "func", "<function called from gdb>"); |
| } |
| else if (get_frame_type (frame) == SIGTRAMP_FRAME) |
| { |
| annotate_signal_handler_caller (); |
| ui_out_field_string (uiout, "func", "<signal handler called>"); |
| } |
| ui_out_text (uiout, "\n"); |
| annotate_frame_end (); |
| |
| do_cleanups (uiout_cleanup); |
| return; |
| } |
| |
| /* If FRAME is not the innermost frame, that normally means that |
| FRAME->pc points to *after* the call instruction, and we want to |
| get the line containing the call, never the next line. But if |
| the next frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the |
| next frame was not entered as the result of a call, and we want |
| to get the line containing FRAME->pc. */ |
| find_frame_sal (frame, &sal); |
| |
| location_print = (print_what == LOCATION |
| || print_what == LOC_AND_ADDRESS |
| || print_what == SRC_AND_LOC); |
| |
| if (location_print || !sal.symtab) |
| print_frame (frame, print_level, print_what, print_args, sal); |
| |
| source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC); |
| |
| if (source_print && sal.symtab) |
| { |
| int done = 0; |
| int mid_statement = ((print_what == SRC_LINE) |
| && (get_frame_pc (frame) != sal.pc)); |
| |
| if (annotation_level) |
| done = identify_source_line (sal.symtab, sal.line, mid_statement, |
| get_frame_pc (frame)); |
| if (!done) |
| { |
| if (deprecated_print_frame_info_listing_hook) |
| deprecated_print_frame_info_listing_hook (sal.symtab, |
| sal.line, |
| sal.line + 1, 0); |
| else |
| { |
| /* We used to do this earlier, but that is clearly |
| wrong. This function is used by many different |
| parts of gdb, including normal_stop in infrun.c, |
| which uses this to print out the current PC |
| when we stepi/nexti into the middle of a source |
| line. Only the command line really wants this |
| behavior. Other UIs probably would like the |
| ability to decide for themselves if it is desired. */ |
| if (addressprint && mid_statement) |
| { |
| ui_out_field_core_addr (uiout, "addr", get_frame_pc (frame)); |
| ui_out_text (uiout, "\t"); |
| } |
| |
| print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| } |
| } |
| } |
| |
| if (print_what != LOCATION) |
| set_default_breakpoint (1, get_frame_pc (frame), sal.symtab, sal.line); |
| |
| annotate_frame_end (); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| static void |
| print_frame (struct frame_info *frame, int print_level, |
| enum print_what print_what, int print_args, |
| struct symtab_and_line sal) |
| { |
| struct symbol *func; |
| char *funname = NULL; |
| enum language funlang = language_unknown; |
| struct ui_stream *stb; |
| struct cleanup *old_chain, *list_chain; |
| |
| stb = ui_out_stream_new (uiout); |
| old_chain = make_cleanup_ui_out_stream_delete (stb); |
| |
| func = find_pc_function (get_frame_address_in_block (frame)); |
| if (func) |
| { |
| /* In certain pathological cases, the symtabs give the wrong |
| function (when we are in the first function in a file which |
| is compiled without debugging symbols, the previous function |
| is compiled with debugging symbols, and the "foo.o" symbol |
| that is supposed to tell us where the file with debugging |
| symbols ends has been truncated by ar because it is longer |
| than 15 characters). This also occurs if the user uses asm() |
| to create a function but not stabs for it (in a file compiled |
| with -g). |
| |
| So look in the minimal symbol tables as well, and if it comes |
| up with a larger address for the function use that instead. |
| I don't think this can ever cause any problems; there |
| shouldn't be any minimal symbols in the middle of a function; |
| if this is ever changed many parts of GDB will need to be |
| changed (and we'll create a find_pc_minimal_function or some |
| such). */ |
| |
| struct minimal_symbol *msymbol = |
| lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame)); |
| |
| if (msymbol != NULL |
| && (SYMBOL_VALUE_ADDRESS (msymbol) |
| > BLOCK_START (SYMBOL_BLOCK_VALUE (func)))) |
| { |
| /* We also don't know anything about the function besides |
| its address and name. */ |
| func = 0; |
| funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| else |
| { |
| funname = DEPRECATED_SYMBOL_NAME (func); |
| funlang = SYMBOL_LANGUAGE (func); |
| if (funlang == language_cplus) |
| { |
| /* It seems appropriate to use SYMBOL_PRINT_NAME() here, |
| to display the demangled name that we already have |
| stored in the symbol table, but we stored a version |
| with DMGL_PARAMS turned on, and here we don't want to |
| display parameters. So call the demangler again, with |
| DMGL_ANSI only. |
| |
| Yes, printf_symbol_filtered() will again try to |
| demangle the name on the fly, but the issue is that |
| if cplus_demangle() fails here, it will fail there |
| too. So we want to catch the failure (where DEMANGLED |
| is NULL below) here, while we still have our hands on |
| the function symbol.) */ |
| char *demangled = cplus_demangle (funname, DMGL_ANSI); |
| if (demangled == NULL) |
| /* If the demangler fails, try the demangled name from |
| the symbol table. That'll have parameters, but |
| that's preferable to displaying a mangled name. */ |
| funname = SYMBOL_PRINT_NAME (func); |
| else |
| xfree (demangled); |
| } |
| } |
| } |
| else |
| { |
| struct minimal_symbol *msymbol = |
| lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame)); |
| |
| if (msymbol != NULL) |
| { |
| funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| } |
| |
| annotate_frame_begin (print_level ? frame_relative_level (frame) : 0, |
| get_frame_pc (frame)); |
| |
| list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| |
| if (print_level) |
| { |
| ui_out_text (uiout, "#"); |
| ui_out_field_fmt_int (uiout, 2, ui_left, "level", |
| frame_relative_level (frame)); |
| } |
| if (addressprint) |
| if (get_frame_pc (frame) != sal.pc || !sal.symtab |
| || print_what == LOC_AND_ADDRESS) |
| { |
| annotate_frame_address (); |
| ui_out_field_core_addr (uiout, "addr", get_frame_pc (frame)); |
| annotate_frame_address_end (); |
| ui_out_text (uiout, " in "); |
| } |
| annotate_frame_function_name (); |
| fprintf_symbol_filtered (stb->stream, funname ? funname : "??", |
| funlang, DMGL_ANSI); |
| ui_out_field_stream (uiout, "func", stb); |
| ui_out_wrap_hint (uiout, " "); |
| annotate_frame_args (); |
| |
| ui_out_text (uiout, " ("); |
| if (print_args) |
| { |
| struct print_args_args args; |
| struct cleanup *args_list_chain; |
| args.frame = frame; |
| args.func = func; |
| args.stream = gdb_stdout; |
| args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args"); |
| catch_errors (print_args_stub, &args, "", RETURN_MASK_ERROR); |
| /* FIXME: ARGS must be a list. If one argument is a string it |
| will have " that will not be properly escaped. */ |
| /* Invoke ui_out_tuple_end. */ |
| do_cleanups (args_list_chain); |
| QUIT; |
| } |
| ui_out_text (uiout, ")"); |
| if (sal.symtab && sal.symtab->filename) |
| { |
| annotate_frame_source_begin (); |
| ui_out_wrap_hint (uiout, " "); |
| ui_out_text (uiout, " at "); |
| annotate_frame_source_file (); |
| ui_out_field_string (uiout, "file", sal.symtab->filename); |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| const char *fullname = symtab_to_fullname (sal.symtab); |
| if (fullname != NULL) |
| ui_out_field_string (uiout, "fullname", fullname); |
| } |
| annotate_frame_source_file_end (); |
| ui_out_text (uiout, ":"); |
| annotate_frame_source_line (); |
| ui_out_field_int (uiout, "line", sal.line); |
| annotate_frame_source_end (); |
| } |
| |
| if (!funname || (!sal.symtab || !sal.symtab->filename)) |
| { |
| #ifdef PC_SOLIB |
| char *lib = PC_SOLIB (get_frame_pc (frame)); |
| #else |
| char *lib = solib_address (get_frame_pc (frame)); |
| #endif |
| if (lib) |
| { |
| annotate_frame_where (); |
| ui_out_wrap_hint (uiout, " "); |
| ui_out_text (uiout, " from "); |
| ui_out_field_string (uiout, "from", lib); |
| } |
| } |
| |
| /* do_cleanups will call ui_out_tuple_end() for us. */ |
| do_cleanups (list_chain); |
| ui_out_text (uiout, "\n"); |
| do_cleanups (old_chain); |
| } |
| |
| |
| /* Read a frame specification in whatever the appropriate format is |
| from FRAME_EXP. Call error(), printing MESSAGE, if the |
| specification is in any way invalid (so this function never returns |
| NULL). When SEPECTED_P is non-NULL set its target to indicate that |
| the default selected frame was used. */ |
| |
| static struct frame_info * |
| parse_frame_specification_1 (const char *frame_exp, const char *message, |
| int *selected_frame_p) |
| { |
| int numargs; |
| struct value *args[4]; |
| CORE_ADDR addrs[ARRAY_SIZE (args)]; |
| |
| if (frame_exp == NULL) |
| numargs = 0; |
| else |
| { |
| char *addr_string; |
| struct cleanup *tmp_cleanup; |
| |
| numargs = 0; |
| while (1) |
| { |
| char *addr_string; |
| struct cleanup *cleanup; |
| const char *p; |
| |
| /* Skip leading white space, bail of EOL. */ |
| while (isspace (*frame_exp)) |
| frame_exp++; |
| if (!*frame_exp) |
| break; |
| |
| /* Parse the argument, extract it, save it. */ |
| for (p = frame_exp; |
| *p && !isspace (*p); |
| p++); |
| addr_string = savestring (frame_exp, p - frame_exp); |
| frame_exp = p; |
| cleanup = make_cleanup (xfree, addr_string); |
| |
| /* NOTE: Parse and evaluate expression, but do not use |
| functions such as parse_and_eval_long or |
| parse_and_eval_address to also extract the value. |
| Instead value_as_long and value_as_address are used. |
| This avoids problems with expressions that contain |
| side-effects. */ |
| if (numargs >= ARRAY_SIZE (args)) |
| error (_("Too many args in frame specification")); |
| args[numargs++] = parse_and_eval (addr_string); |
| |
| do_cleanups (cleanup); |
| } |
| } |
| |
| /* If no args, default to the selected frame. */ |
| if (numargs == 0) |
| { |
| if (selected_frame_p != NULL) |
| (*selected_frame_p) = 1; |
| return get_selected_frame (message); |
| } |
| |
| /* None of the remaining use the selected frame. */ |
| if (selected_frame_p != NULL) |
| (*selected_frame_p) = 0; |
| |
| /* Assume the single arg[0] is an integer, and try using that to |
| select a frame relative to current. */ |
| if (numargs == 1) |
| { |
| struct frame_info *fid; |
| int level = value_as_long (args[0]); |
| fid = find_relative_frame (get_current_frame (), &level); |
| if (level == 0) |
| /* find_relative_frame was successful */ |
| return fid; |
| } |
| |
| /* Convert each value into a corresponding address. */ |
| { |
| int i; |
| for (i = 0; i < numargs; i++) |
| addrs[i] = value_as_address (args[0]); |
| } |
| |
| /* Assume that the single arg[0] is an address, use that to identify |
| a frame with a matching ID. Should this also accept stack/pc or |
| stack/pc/special. */ |
| if (numargs == 1) |
| { |
| struct frame_id id = frame_id_build_wild (addrs[0]); |
| struct frame_info *fid; |
| |
| /* If (s)he specifies the frame with an address, he deserves |
| what (s)he gets. Still, give the highest one that matches. |
| (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't |
| know). */ |
| for (fid = get_current_frame (); |
| fid != NULL; |
| fid = get_prev_frame (fid)) |
| { |
| if (frame_id_eq (id, get_frame_id (fid))) |
| { |
| while (frame_id_eq (id, frame_unwind_id (fid))) |
| fid = get_prev_frame (fid); |
| return fid; |
| } |
| } |
| } |
| |
| /* We couldn't identify the frame as an existing frame, but |
| perhaps we can create one with a single argument. */ |
| if (numargs == 1) |
| return create_new_frame (addrs[0], 0); |
| else if (numargs == 2) |
| return create_new_frame (addrs[0], addrs[1]); |
| else |
| error (_("Too many args in frame specification")); |
| } |
| |
| static struct frame_info * |
| parse_frame_specification (char *frame_exp) |
| { |
| return parse_frame_specification_1 (frame_exp, NULL, NULL); |
| } |
| |
| /* Print verbosely the selected frame or the frame at address |
| ADDR_EXP. Absolutely all information in the frame is printed. */ |
| |
| static void |
| frame_info (char *addr_exp, int from_tty) |
| { |
| struct frame_info *fi; |
| struct symtab_and_line sal; |
| struct symbol *func; |
| struct symtab *s; |
| struct frame_info *calling_frame_info; |
| int i, count, numregs; |
| char *funname = 0; |
| enum language funlang = language_unknown; |
| const char *pc_regname; |
| int selected_frame_p; |
| struct gdbarch *gdbarch; |
| |
| fi = parse_frame_specification_1 (addr_exp, "No stack.", &selected_frame_p); |
| gdbarch = get_frame_arch (fi); |
| |
| /* Name of the value returned by get_frame_pc(). Per comments, "pc" |
| is not a good name. */ |
| if (gdbarch_pc_regnum (gdbarch) >= 0) |
| /* OK, this is weird. The gdbarch_pc_regnum hardware register's value can |
| easily not match that of the internal value returned by |
| get_frame_pc(). */ |
| pc_regname = gdbarch_register_name (gdbarch, gdbarch_pc_regnum (gdbarch)); |
| else |
| /* But then, this is weird to. Even without gdbarch_pc_regnum, an |
| architectures will often have a hardware register called "pc", |
| and that register's value, again, can easily not match |
| get_frame_pc(). */ |
| pc_regname = "pc"; |
| |
| find_frame_sal (fi, &sal); |
| func = get_frame_function (fi); |
| /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain |
| the same value? */ |
| s = find_pc_symtab (get_frame_pc (fi)); |
| if (func) |
| { |
| /* It seems appropriate to use SYMBOL_PRINT_NAME() here, to |
| display the demangled name that we already have stored in the |
| symbol table, but we stored a version with DMGL_PARAMS turned |
| on, and here we don't want to display parameters. So call the |
| demangler again, with DMGL_ANSI only. |
| |
| Yes, printf_symbol_filtered() will again try to demangle the |
| name on the fly, but the issue is that if cplus_demangle() |
| fails here, it will fail there too. So we want to catch the |
| failure (where DEMANGLED is NULL below) here, while we still |
| have our hands on the function symbol.) */ |
| funname = DEPRECATED_SYMBOL_NAME (func); |
| funlang = SYMBOL_LANGUAGE (func); |
| if (funlang == language_cplus) |
| { |
| char *demangled = cplus_demangle (funname, DMGL_ANSI); |
| /* If the demangler fails, try the demangled name from the |
| symbol table. That'll have parameters, but that's |
| preferable to displaying a mangled name. */ |
| if (demangled == NULL) |
| funname = SYMBOL_PRINT_NAME (func); |
| else |
| xfree (demangled); |
| } |
| } |
| else |
| { |
| struct minimal_symbol *msymbol; |
| |
| msymbol = lookup_minimal_symbol_by_pc (get_frame_pc (fi)); |
| if (msymbol != NULL) |
| { |
| funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| funlang = SYMBOL_LANGUAGE (msymbol); |
| } |
| } |
| calling_frame_info = get_prev_frame (fi); |
| |
| if (selected_frame_p && frame_relative_level (fi) >= 0) |
| { |
| printf_filtered (_("Stack level %d, frame at "), |
| frame_relative_level (fi)); |
| } |
| else |
| { |
| printf_filtered (_("Stack frame at ")); |
| } |
| fputs_filtered (paddress (get_frame_base (fi)), gdb_stdout); |
| printf_filtered (":\n"); |
| printf_filtered (" %s = ", pc_regname); |
| fputs_filtered (paddress (get_frame_pc (fi)), gdb_stdout); |
| |
| wrap_here (" "); |
| if (funname) |
| { |
| printf_filtered (" in "); |
| fprintf_symbol_filtered (gdb_stdout, funname, funlang, |
| DMGL_ANSI | DMGL_PARAMS); |
| } |
| wrap_here (" "); |
| if (sal.symtab) |
| printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line); |
| puts_filtered ("; "); |
| wrap_here (" "); |
| printf_filtered ("saved %s ", pc_regname); |
| fputs_filtered (paddress (frame_pc_unwind (fi)), gdb_stdout); |
| printf_filtered ("\n"); |
| |
| if (calling_frame_info == NULL) |
| { |
| enum unwind_stop_reason reason; |
| |
| reason = get_frame_unwind_stop_reason (fi); |
| if (reason != UNWIND_NO_REASON) |
| printf_filtered (_(" Outermost frame: %s\n"), |
| frame_stop_reason_string (reason)); |
| } |
| |
| if (calling_frame_info) |
| { |
| printf_filtered (" called by frame at "); |
| fputs_filtered (paddress (get_frame_base (calling_frame_info)), |
| gdb_stdout); |
| } |
| if (get_next_frame (fi) && calling_frame_info) |
| puts_filtered (","); |
| wrap_here (" "); |
| if (get_next_frame (fi)) |
| { |
| printf_filtered (" caller of frame at "); |
| fputs_filtered (paddress (get_frame_base (get_next_frame (fi))), |
| gdb_stdout); |
| } |
| if (get_next_frame (fi) || calling_frame_info) |
| puts_filtered ("\n"); |
| |
| if (s) |
| printf_filtered (" source language %s.\n", |
| language_str (s->language)); |
| |
| { |
| /* Address of the argument list for this frame, or 0. */ |
| CORE_ADDR arg_list = get_frame_args_address (fi); |
| /* Number of args for this frame, or -1 if unknown. */ |
| int numargs; |
| |
| if (arg_list == 0) |
| printf_filtered (" Arglist at unknown address.\n"); |
| else |
| { |
| printf_filtered (" Arglist at "); |
| fputs_filtered (paddress (arg_list), gdb_stdout); |
| printf_filtered (","); |
| |
| if (!gdbarch_frame_num_args_p (gdbarch)) |
| { |
| numargs = -1; |
| puts_filtered (" args: "); |
| } |
| else |
| { |
| numargs = gdbarch_frame_num_args (gdbarch, fi); |
| gdb_assert (numargs >= 0); |
| if (numargs == 0) |
| puts_filtered (" no args."); |
| else if (numargs == 1) |
| puts_filtered (" 1 arg: "); |
| else |
| printf_filtered (" %d args: ", numargs); |
| } |
| print_frame_args (func, fi, numargs, gdb_stdout); |
| puts_filtered ("\n"); |
| } |
| } |
| { |
| /* Address of the local variables for this frame, or 0. */ |
| CORE_ADDR arg_list = get_frame_locals_address (fi); |
| |
| if (arg_list == 0) |
| printf_filtered (" Locals at unknown address,"); |
| else |
| { |
| printf_filtered (" Locals at "); |
| fputs_filtered (paddress (arg_list), gdb_stdout); |
| printf_filtered (","); |
| } |
| } |
| |
| /* Print as much information as possible on the location of all the |
| registers. */ |
| { |
| enum lval_type lval; |
| int optimized; |
| CORE_ADDR addr; |
| int realnum; |
| int count; |
| int i; |
| int need_nl = 1; |
| |
| /* The sp is special; what's displayed isn't the save address, but |
| the value of the previous frame's sp. This is a legacy thing, |
| at one stage the frame cached the previous frame's SP instead |
| of its address, hence it was easiest to just display the cached |
| value. */ |
| if (gdbarch_sp_regnum (gdbarch) >= 0) |
| { |
| /* Find out the location of the saved stack pointer with out |
| actually evaluating it. */ |
| frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch), |
| &optimized, &lval, &addr, |
| &realnum, NULL); |
| if (!optimized && lval == not_lval) |
| { |
| gdb_byte value[MAX_REGISTER_SIZE]; |
| CORE_ADDR sp; |
| frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch), |
| &optimized, &lval, &addr, |
| &realnum, value); |
| /* NOTE: cagney/2003-05-22: This is assuming that the |
| stack pointer was packed as an unsigned integer. That |
| may or may not be valid. */ |
| sp = extract_unsigned_integer (value, |
| register_size (gdbarch, |
| gdbarch_sp_regnum (gdbarch))); |
| printf_filtered (" Previous frame's sp is "); |
| fputs_filtered (paddress (sp), gdb_stdout); |
| printf_filtered ("\n"); |
| need_nl = 0; |
| } |
| else if (!optimized && lval == lval_memory) |
| { |
| printf_filtered (" Previous frame's sp at "); |
| fputs_filtered (paddress (addr), gdb_stdout); |
| printf_filtered ("\n"); |
| need_nl = 0; |
| } |
| else if (!optimized && lval == lval_register) |
| { |
| printf_filtered (" Previous frame's sp in %s\n", |
| gdbarch_register_name (gdbarch, realnum)); |
| need_nl = 0; |
| } |
| /* else keep quiet. */ |
| } |
| |
| count = 0; |
| numregs = gdbarch_num_regs (gdbarch) |
| + gdbarch_num_pseudo_regs (gdbarch); |
| for (i = 0; i < numregs; i++) |
| if (i != gdbarch_sp_regnum (gdbarch) |
| && gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) |
| { |
| /* Find out the location of the saved register without |
| fetching the corresponding value. */ |
| frame_register_unwind (fi, i, &optimized, &lval, &addr, &realnum, |
| NULL); |
| /* For moment, only display registers that were saved on the |
| stack. */ |
| if (!optimized && lval == lval_memory) |
| { |
| if (count == 0) |
| puts_filtered (" Saved registers:\n "); |
| else |
| puts_filtered (","); |
| wrap_here (" "); |
| printf_filtered (" %s at ", |
| gdbarch_register_name (gdbarch, i)); |
| fputs_filtered (paddress (addr), gdb_stdout); |
| count++; |
| } |
| } |
| if (count || need_nl) |
| puts_filtered ("\n"); |
| } |
| } |
| |
| /* Print briefly all stack frames or just the innermost COUNT_EXP |
| frames. */ |
| |
| static void |
| backtrace_command_1 (char *count_exp, int show_locals, int from_tty) |
| { |
| struct frame_info *fi; |
| int count; |
| int i; |
| struct frame_info *trailing; |
| int trailing_level; |
| |
| if (!target_has_stack) |
| error (_("No stack.")); |
| |
| /* The following code must do two things. First, it must set the |
| variable TRAILING to the frame from which we should start |
| printing. Second, it must set the variable count to the number |
| of frames which we should print, or -1 if all of them. */ |
| trailing = get_current_frame (); |
| |
| /* The target can be in a state where there is no valid frames |
| (e.g., just connected). */ |
| if (trailing == NULL) |
| error (_("No stack.")); |
| |
| trailing_level = 0; |
| if (count_exp) |
| { |
| count = parse_and_eval_long (count_exp); |
| if (count < 0) |
| { |
| struct frame_info *current; |
| |
| count = -count; |
| |
| current = trailing; |
| while (current && count--) |
| { |
| QUIT; |
| current = get_prev_frame (current); |
| } |
| |
| /* Will stop when CURRENT reaches the top of the stack. |
| TRAILING will be COUNT below it. */ |
| while (current) |
| { |
| QUIT; |
| trailing = get_prev_frame (trailing); |
| current = get_prev_frame (current); |
| trailing_level++; |
| } |
| |
| count = -1; |
| } |
| } |
| else |
| count = -1; |
| |
| if (info_verbose) |
| { |
| struct partial_symtab *ps; |
| |
| /* Read in symbols for all of the frames. Need to do this in a |
| separate pass so that "Reading in symbols for xxx" messages |
| don't screw up the appearance of the backtrace. Also if |
| people have strong opinions against reading symbols for |
| backtrace this may have to be an option. */ |
| i = count; |
| for (fi = trailing; fi != NULL && i--; fi = get_prev_frame (fi)) |
| { |
| QUIT; |
| ps = find_pc_psymtab (get_frame_address_in_block (fi)); |
| if (ps) |
| PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in. */ |
| } |
| } |
| |
| for (i = 0, fi = trailing; fi && count--; i++, fi = get_prev_frame (fi)) |
| { |
| QUIT; |
| |
| /* Don't use print_stack_frame; if an error() occurs it probably |
| means further attempts to backtrace would fail (on the other |
| hand, perhaps the code does or could be fixed to make sure |
| the frame->prev field gets set to NULL in that case). */ |
| print_frame_info (fi, 1, LOCATION, 1); |
| if (show_locals) |
| print_frame_local_vars (fi, 1, gdb_stdout); |
| |
| /* Save the last frame to check for error conditions. */ |
| trailing = fi; |
| } |
| |
| /* If we've stopped before the end, mention that. */ |
| if (fi && from_tty) |
| printf_filtered (_("(More stack frames follow...)\n")); |
| |
| /* If we've run out of frames, and the reason appears to be an error |
| condition, print it. */ |
| if (fi == NULL && trailing != NULL) |
| { |
| enum unwind_stop_reason reason; |
| |
| reason = get_frame_unwind_stop_reason (trailing); |
| if (reason > UNWIND_FIRST_ERROR) |
| printf_filtered (_("Backtrace stopped: %s\n"), |
| frame_stop_reason_string (reason)); |
| } |
| } |
| |
| struct backtrace_command_args |
| { |
| char *count_exp; |
| int show_locals; |
| int from_tty; |
| }; |
| |
| /* Stub for catch_errors. */ |
| |
| static int |
| backtrace_command_stub (void *data) |
| { |
| struct backtrace_command_args *args = data; |
| backtrace_command_1 (args->count_exp, args->show_locals, args->from_tty); |
| return 0; |
| } |
| |
| static void |
| backtrace_command (char *arg, int from_tty) |
| { |
| struct cleanup *old_chain = NULL; |
| int fulltrace_arg = -1, arglen = 0, argc = 0; |
| struct backtrace_command_args btargs; |
| |
| if (arg) |
| { |
| char **argv; |
| int i; |
| |
| argv = buildargv (arg); |
| old_chain = make_cleanup_freeargv (argv); |
| argc = 0; |
| for (i = 0; argv[i]; i++) |
| { |
| unsigned int j; |
| |
| for (j = 0; j < strlen (argv[i]); j++) |
| argv[i][j] = tolower (argv[i][j]); |
| |
| if (fulltrace_arg < 0 && subset_compare (argv[i], "full")) |
| fulltrace_arg = argc; |
| else |
| { |
| arglen += strlen (argv[i]); |
| argc++; |
| } |
| } |
| arglen += argc; |
| if (fulltrace_arg >= 0) |
| { |
| if (arglen > 0) |
| { |
| arg = xmalloc (arglen + 1); |
| memset (arg, 0, arglen + 1); |
| for (i = 0; i < (argc + 1); i++) |
| { |
| if (i != fulltrace_arg) |
| { |
| strcat (arg, argv[i]); |
| strcat (arg, " "); |
| } |
| } |
| } |
| else |
| arg = NULL; |
| } |
| } |
| |
| btargs.count_exp = arg; |
| btargs.show_locals = (fulltrace_arg >= 0); |
| btargs.from_tty = from_tty; |
| catch_errors (backtrace_command_stub, &btargs, "", RETURN_MASK_ERROR); |
| |
| if (fulltrace_arg >= 0 && arglen > 0) |
| xfree (arg); |
| |
| if (old_chain) |
| do_cleanups (old_chain); |
| } |
| |
| static void |
| backtrace_full_command (char *arg, int from_tty) |
| { |
| struct backtrace_command_args btargs; |
| btargs.count_exp = arg; |
| btargs.show_locals = 1; |
| btargs.from_tty = from_tty; |
| catch_errors (backtrace_command_stub, &btargs, "", RETURN_MASK_ERROR); |
| } |
| |
| |
| /* Print the local variables of a block B active in FRAME on STREAM. |
| Return 1 if any variables were printed; 0 otherwise. */ |
| |
| static int |
| print_block_frame_locals (struct block *b, struct frame_info *frame, |
| int num_tabs, struct ui_file *stream) |
| { |
| struct dict_iterator iter; |
| struct symbol *sym; |
| int values_printed = 0; |
| int j; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| switch (SYMBOL_CLASS (sym)) |
| { |
| case LOC_LOCAL: |
| case LOC_REGISTER: |
| case LOC_STATIC: |
| case LOC_COMPUTED: |
| if (SYMBOL_IS_ARGUMENT (sym)) |
| break; |
| values_printed = 1; |
| for (j = 0; j < num_tabs; j++) |
| fputs_filtered ("\t", stream); |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| fputs_filtered (" = ", stream); |
| print_variable_value (sym, frame, stream); |
| fprintf_filtered (stream, "\n"); |
| break; |
| |
| default: |
| /* Ignore symbols which are not locals. */ |
| break; |
| } |
| } |
| |
| return values_printed; |
| } |
| |
| /* Same, but print labels. */ |
| |
| static int |
| print_block_frame_labels (struct block *b, int *have_default, |
| struct ui_file *stream) |
| { |
| struct dict_iterator iter; |
| struct symbol *sym; |
| int values_printed = 0; |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| if (strcmp (DEPRECATED_SYMBOL_NAME (sym), "default") == 0) |
| { |
| if (*have_default) |
| continue; |
| *have_default = 1; |
| } |
| if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| { |
| struct symtab_and_line sal; |
| sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| values_printed = 1; |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| if (addressprint) |
| { |
| fprintf_filtered (stream, " "); |
| fputs_filtered (paddress (SYMBOL_VALUE_ADDRESS (sym)), stream); |
| } |
| fprintf_filtered (stream, " in file %s, line %d\n", |
| sal.symtab->filename, sal.line); |
| } |
| } |
| |
| return values_printed; |
| } |
| |
| /* Print on STREAM all the local variables in frame FRAME, including |
| all the blocks active in that frame at its current PC. |
| |
| Returns 1 if the job was done, or 0 if nothing was printed because |
| we have no info on the function running in FRAME. */ |
| |
| static void |
| print_frame_local_vars (struct frame_info *frame, int num_tabs, |
| struct ui_file *stream) |
| { |
| struct block *block = get_frame_block (frame, 0); |
| int values_printed = 0; |
| |
| if (block == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| while (block) |
| { |
| if (print_block_frame_locals (block, frame, num_tabs, stream)) |
| values_printed = 1; |
| /* After handling the function's top-level block, stop. Don't |
| continue to its superblock, the block of per-file symbols. */ |
| if (BLOCK_FUNCTION (block)) |
| break; |
| block = BLOCK_SUPERBLOCK (block); |
| } |
| |
| if (!values_printed) |
| fprintf_filtered (stream, _("No locals.\n")); |
| } |
| |
| /* Same, but print labels. */ |
| |
| static void |
| print_frame_label_vars (struct frame_info *frame, int this_level_only, |
| struct ui_file *stream) |
| { |
| #if 1 |
| fprintf_filtered (stream, "print_frame_label_vars disabled.\n"); |
| #else |
| struct blockvector *bl; |
| struct block *block = get_frame_block (frame, 0); |
| int values_printed = 0; |
| int index, have_default = 0; |
| char *blocks_printed; |
| CORE_ADDR pc = get_frame_pc (frame); |
| |
| if (block == 0) |
| { |
| fprintf_filtered (stream, "No symbol table info available.\n"); |
| return; |
| } |
| |
| bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| blocks_printed = alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| memset (blocks_printed, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| |
| while (block != 0) |
| { |
| CORE_ADDR end = BLOCK_END (block) - 4; |
| int last_index; |
| |
| if (bl != blockvector_for_pc (end, &index)) |
| error (_("blockvector blotch")); |
| if (BLOCKVECTOR_BLOCK (bl, index) != block) |
| error (_("blockvector botch")); |
| last_index = BLOCKVECTOR_NBLOCKS (bl); |
| index += 1; |
| |
| /* Don't print out blocks that have gone by. */ |
| while (index < last_index |
| && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) |
| index++; |
| |
| while (index < last_index |
| && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) |
| { |
| if (blocks_printed[index] == 0) |
| { |
| if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), |
| &have_default, stream)) |
| values_printed = 1; |
| blocks_printed[index] = 1; |
| } |
| index++; |
| } |
| if (have_default) |
| return; |
| if (values_printed && this_level_only) |
| return; |
| |
| /* After handling the function's top-level block, stop. Don't |
| continue to its superblock, the block of per-file symbols. */ |
| if (BLOCK_FUNCTION (block)) |
| break; |
| block = BLOCK_SUPERBLOCK (block); |
| } |
| |
| if (!values_printed && !this_level_only) |
| fprintf_filtered (stream, _("No catches.\n")); |
| #endif |
| } |
| |
| void |
| locals_info (char *args, int from_tty) |
| { |
| print_frame_local_vars (get_selected_frame (_("No frame selected.")), |
| 0, gdb_stdout); |
| } |
| |
| static void |
| catch_info (char *ignore, int from_tty) |
| { |
| struct symtab_and_line *sal; |
| |
| /* Assume g++ compiled code; old GDB 4.16 behaviour. */ |
| print_frame_label_vars (get_selected_frame (_("No frame selected.")), |
| 0, gdb_stdout); |
| } |
| |
| static void |
| print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream) |
| { |
| struct symbol *func = get_frame_function (frame); |
| struct block *b; |
| struct dict_iterator iter; |
| struct symbol *sym, *sym2; |
| int values_printed = 0; |
| |
| if (func == 0) |
| { |
| fprintf_filtered (stream, _("No symbol table info available.\n")); |
| return; |
| } |
| |
| b = SYMBOL_BLOCK_VALUE (func); |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| /* Don't worry about things which aren't arguments. */ |
| if (SYMBOL_IS_ARGUMENT (sym)) |
| { |
| values_printed = 1; |
| fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| fputs_filtered (" = ", stream); |
| |
| /* We have to look up the symbol because arguments can have |
| two entries (one a parameter, one a local) and the one we |
| want is the local, which lookup_symbol will find for us. |
| This includes gcc1 (not gcc2) on the sparc when passing a |
| small structure and gcc2 when the argument type is float |
| and it is passed as a double and converted to float by |
| the prologue (in the latter case the type of the LOC_ARG |
| symbol is double and the type of the LOC_LOCAL symbol is |
| float). There are also LOC_ARG/LOC_REGISTER pairs which |
| are not combined in symbol-reading. */ |
| |
| sym2 = lookup_symbol (DEPRECATED_SYMBOL_NAME (sym), |
| b, VAR_DOMAIN, NULL); |
| print_variable_value (sym2, frame, stream); |
| fprintf_filtered (stream, "\n"); |
| } |
| } |
| |
| if (!values_printed) |
| fprintf_filtered (stream, _("No arguments.\n")); |
| } |
| |
| void |
| args_info (char *ignore, int from_tty) |
| { |
| print_frame_arg_vars (get_selected_frame (_("No frame selected.")), |
| gdb_stdout); |
| } |
| |
| |
| static void |
| args_plus_locals_info (char *ignore, int from_tty) |
| { |
| args_info (ignore, from_tty); |
| locals_info (ignore, from_tty); |
| } |
| |
| |
| /* Select frame FRAME. Also print the stack frame and show the source |
| if this is the tui version. */ |
| static void |
| select_and_print_frame (struct frame_info *frame) |
| { |
| select_frame (frame); |
| if (frame) |
| print_stack_frame (frame, 1, SRC_AND_LOC); |
| } |
| |
| /* Return the symbol-block in which the selected frame is executing. |
| Can return zero under various legitimate circumstances. |
| |
| If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant |
| code address within the block returned. We use this to decide |
| which macros are in scope. */ |
| |
| struct block * |
| get_selected_block (CORE_ADDR *addr_in_block) |
| { |
| if (!target_has_stack) |
| return 0; |
| |
| return get_frame_block (get_selected_frame (NULL), addr_in_block); |
| } |
| |
| /* Find a frame a certain number of levels away from FRAME. |
| LEVEL_OFFSET_PTR points to an int containing the number of levels. |
| Positive means go to earlier frames (up); negative, the reverse. |
| The int that contains the number of levels is counted toward |
| zero as the frames for those levels are found. |
| If the top or bottom frame is reached, that frame is returned, |
| but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates |
| how much farther the original request asked to go. */ |
| |
| struct frame_info * |
| find_relative_frame (struct frame_info *frame, int *level_offset_ptr) |
| { |
| /* Going up is simple: just call get_prev_frame enough times or |
| until the initial frame is reached. */ |
| while (*level_offset_ptr > 0) |
| { |
| struct frame_info *prev = get_prev_frame (frame); |
| if (!prev) |
| break; |
| (*level_offset_ptr)--; |
| frame = prev; |
| } |
| |
| /* Going down is just as simple. */ |
| while (*level_offset_ptr < 0) |
| { |
| struct frame_info *next = get_next_frame (frame); |
| if (!next) |
| break; |
| (*level_offset_ptr)++; |
| frame = next; |
| } |
| |
| return frame; |
| } |
| |
| /* The "select_frame" command. With no argument this is a NOP. |
| Select the frame at level LEVEL_EXP if it is a valid level. |
| Otherwise, treat LEVEL_EXP as an address expression and select it. |
| |
| See parse_frame_specification for more info on proper frame |
| expressions. */ |
| |
| void |
| select_frame_command (char *level_exp, int from_tty) |
| { |
| select_frame (parse_frame_specification_1 (level_exp, "No stack.", NULL)); |
| } |
| |
| /* The "frame" command. With no argument, print the selected frame |
| briefly. With an argument, behave like select_frame and then print |
| the selected frame. */ |
| |
| static void |
| frame_command (char *level_exp, int from_tty) |
| { |
| select_frame_command (level_exp, from_tty); |
| print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
| } |
| |
| /* The XDB Compatibility command to print the current frame. */ |
| |
| static void |
| current_frame_command (char *level_exp, int from_tty) |
| { |
| print_stack_frame (get_selected_frame (_("No stack.")), 1, SRC_AND_LOC); |
| } |
| |
| /* Select the frame up one or COUNT_EXP stack levels from the |
| previously selected frame, and print it briefly. */ |
| |
| static void |
| up_silently_base (char *count_exp) |
| { |
| struct frame_info *frame; |
| int count = 1; |
| |
| if (count_exp) |
| count = parse_and_eval_long (count_exp); |
| |
| frame = find_relative_frame (get_selected_frame ("No stack."), &count); |
| if (count != 0 && count_exp == NULL) |
| error (_("Initial frame selected; you cannot go up.")); |
| select_frame (frame); |
| } |
| |
| static void |
| up_silently_command (char *count_exp, int from_tty) |
| { |
| up_silently_base (count_exp); |
| } |
| |
| static void |
| up_command (char *count_exp, int from_tty) |
| { |
| up_silently_base (count_exp); |
| print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
| } |
| |
| /* Select the frame down one or COUNT_EXP stack levels from the previously |
| selected frame, and print it briefly. */ |
| |
| static void |
| down_silently_base (char *count_exp) |
| { |
| struct frame_info *frame; |
| int count = -1; |
| if (count_exp) |
| count = -parse_and_eval_long (count_exp); |
| |
| frame = find_relative_frame (get_selected_frame ("No stack."), &count); |
| if (count != 0 && count_exp == NULL) |
| { |
| /* We only do this if COUNT_EXP is not specified. That way |
| "down" means to really go down (and let me know if that is |
| impossible), but "down 9999" can be used to mean go all the |
| way down without getting an error. */ |
| |
| error (_("Bottom (innermost) frame selected; you cannot go down.")); |
| } |
| |
| select_frame (frame); |
| } |
| |
| static void |
| down_silently_command (char *count_exp, int from_tty) |
| { |
| down_silently_base (count_exp); |
| } |
| |
| static void |
| down_command (char *count_exp, int from_tty) |
| { |
| down_silently_base (count_exp); |
| print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
| } |
| |
| |
| void |
| return_command (char *retval_exp, int from_tty) |
| { |
| struct symbol *thisfun; |
| struct value *return_value = NULL; |
| const char *query_prefix = ""; |
| |
| thisfun = get_frame_function (get_selected_frame ("No selected frame.")); |
| |
| /* Compute the return value. If the computation triggers an error, |
| let it bail. If the return type can't be handled, set |
| RETURN_VALUE to NULL, and QUERY_PREFIX to an informational |
| message. */ |
| if (retval_exp) |
| { |
| struct type *return_type = NULL; |
| |
| /* Compute the return value. Should the computation fail, this |
| call throws an error. */ |
| return_value = parse_and_eval (retval_exp); |
| |
| /* Cast return value to the return type of the function. Should |
| the cast fail, this call throws an error. */ |
| if (thisfun != NULL) |
| return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun)); |
| if (return_type == NULL) |
| return_type = builtin_type_int; |
| CHECK_TYPEDEF (return_type); |
| return_value = value_cast (return_type, return_value); |
| |
| /* Make sure the value is fully evaluated. It may live in the |
| stack frame we're about to pop. */ |
| if (value_lazy (return_value)) |
| value_fetch_lazy (return_value); |
| |
| if (TYPE_CODE (return_type) == TYPE_CODE_VOID) |
| /* If the return-type is "void", don't try to find the |
| return-value's location. However, do still evaluate the |
| return expression so that, even when the expression result |
| is discarded, side effects such as "return i++" still |
| occur. */ |
| return_value = NULL; |
| else if (using_struct_return (SYMBOL_TYPE (thisfun), return_type)) |
| { |
| query_prefix = "\ |
| The location at which to store the function's return value is unknown.\n\ |
| If you continue, the return value that you specified will be ignored.\n"; |
| return_value = NULL; |
| } |
| } |
| |
| /* Does an interactive user really want to do this? Include |
| information, such as how well GDB can handle the return value, in |
| the query message. */ |
| if (from_tty) |
| { |
| int confirmed; |
| if (thisfun == NULL) |
| confirmed = query (_("%sMake selected stack frame return now? "), |
| query_prefix); |
| else |
| confirmed = query (_("%sMake %s return now? "), query_prefix, |
| SYMBOL_PRINT_NAME (thisfun)); |
| if (!confirmed) |
| error (_("Not confirmed")); |
| } |
| |
| /* NOTE: cagney/2003-01-18: Is this silly? Rather than pop each |
| frame in turn, should this code just go straight to the relevant |
| frame and pop that? */ |
| |
| /* First discard all frames inner-to the selected frame (making the |
| selected frame current). */ |
| { |
| struct frame_id selected_id = get_frame_id (get_selected_frame (NULL)); |
| while (!frame_id_eq (selected_id, get_frame_id (get_current_frame ()))) |
| { |
| struct frame_info *frame = get_current_frame (); |
| if (frame_id_inner (get_frame_arch (frame), selected_id, |
| get_frame_id (frame))) |
| /* Caught in the safety net, oops! We've gone way past the |
| selected frame. */ |
| error (_("Problem while popping stack frames (corrupt stack?)")); |
| frame_pop (get_current_frame ()); |
| } |
| } |
| |
| /* Second discard the selected frame (which is now also the current |
| frame). */ |
| frame_pop (get_current_frame ()); |
| |
| /* Store RETURN_VALUE in the just-returned register set. */ |
| if (return_value != NULL) |
| { |
| struct type *return_type = value_type (return_value); |
| struct gdbarch *gdbarch = get_regcache_arch (get_current_regcache ()); |
| gdb_assert (gdbarch_return_value (gdbarch, SYMBOL_TYPE (thisfun), |
| return_type, NULL, NULL, NULL) |
| == RETURN_VALUE_REGISTER_CONVENTION); |
| gdbarch_return_value (gdbarch, SYMBOL_TYPE (thisfun), return_type, |
| get_current_regcache (), NULL /*read*/, |
| value_contents (return_value) /*write*/); |
| } |
| |
| /* If we are at the end of a call dummy now, pop the dummy frame |
| too. */ |
| if (get_frame_type (get_current_frame ()) == DUMMY_FRAME) |
| frame_pop (get_current_frame ()); |
| |
| /* If interactive, print the frame that is now current. */ |
| if (from_tty) |
| frame_command ("0", 1); |
| else |
| select_frame_command ("0", 0); |
| } |
| |
| /* Sets the scope to input function name, provided that the function |
| is within the current stack frame */ |
| |
| struct function_bounds |
| { |
| CORE_ADDR low, high; |
| }; |
| |
| static void |
| func_command (char *arg, int from_tty) |
| { |
| struct frame_info *frame; |
| int found = 0; |
| struct symtabs_and_lines sals; |
| int i; |
| int level = 1; |
| struct function_bounds *func_bounds = NULL; |
| |
| if (arg != NULL) |
| return; |
| |
| frame = parse_frame_specification ("0"); |
| sals = decode_line_spec (arg, 1); |
| func_bounds = (struct function_bounds *) xmalloc ( |
| sizeof (struct function_bounds) * sals.nelts); |
| for (i = 0; (i < sals.nelts && !found); i++) |
| { |
| if (sals.sals[i].pc == 0 |
| || find_pc_partial_function (sals.sals[i].pc, NULL, |
| &func_bounds[i].low, |
| &func_bounds[i].high) == 0) |
| { |
| func_bounds[i].low = func_bounds[i].high = 0; |
| } |
| } |
| |
| do |
| { |
| for (i = 0; (i < sals.nelts && !found); i++) |
| found = (get_frame_pc (frame) >= func_bounds[i].low |
| && get_frame_pc (frame) < func_bounds[i].high); |
| if (!found) |
| { |
| level = 1; |
| frame = find_relative_frame (frame, &level); |
| } |
| } |
| while (!found && level == 0); |
| |
| if (func_bounds) |
| xfree (func_bounds); |
| |
| if (!found) |
| printf_filtered (_("'%s' not within current stack frame.\n"), arg); |
| else if (frame != get_selected_frame (NULL)) |
| select_and_print_frame (frame); |
| } |
| |
| /* Gets the language of the current frame. */ |
| |
| enum language |
| get_frame_language (void) |
| { |
| struct frame_info *frame = deprecated_safe_get_selected_frame (); |
| |
| if (frame) |
| { |
| /* We determine the current frame language by looking up its |
| associated symtab. To retrieve this symtab, we use the frame |
| PC. However we cannot use the frame PC as is, because it |
| usually points to the instruction following the "call", which |
| is sometimes the first instruction of another function. So |
| we rely on get_frame_address_in_block(), it provides us with |
| a PC that is guaranteed to be inside the frame's code |
| block. */ |
| CORE_ADDR pc = get_frame_address_in_block (frame); |
| struct symtab *s = find_pc_symtab (pc); |
| |
| if (s) |
| return s->language; |
| } |
| |
| return language_unknown; |
| } |
| |
| |
| /* Provide a prototype to silence -Wmissing-prototypes. */ |
| void _initialize_stack (void); |
| |
| void |
| _initialize_stack (void) |
| { |
| #if 0 |
| backtrace_limit = 30; |
| #endif |
| |
| add_com ("return", class_stack, return_command, _("\ |
| Make selected stack frame return to its caller.\n\ |
| Control remains in the debugger, but when you continue\n\ |
| execution will resume in the frame above the one now selected.\n\ |
| If an argument is given, it is an expression for the value to return.")); |
| |
| add_com ("up", class_stack, up_command, _("\ |
| Select and print stack frame that called this one.\n\ |
| An argument says how many frames up to go.")); |
| add_com ("up-silently", class_support, up_silently_command, _("\ |
| Same as the `up' command, but does not print anything.\n\ |
| This is useful in command scripts.")); |
| |
| add_com ("down", class_stack, down_command, _("\ |
| Select and print stack frame called by this one.\n\ |
| An argument says how many frames down to go.")); |
| add_com_alias ("do", "down", class_stack, 1); |
| add_com_alias ("dow", "down", class_stack, 1); |
| add_com ("down-silently", class_support, down_silently_command, _("\ |
| Same as the `down' command, but does not print anything.\n\ |
| This is useful in command scripts.")); |
| |
| add_com ("frame", class_stack, frame_command, _("\ |
| Select and print a stack frame.\n\ |
| With no argument, print the selected stack frame. (See also \"info frame\").\n\ |
| An argument specifies the frame to select.\n\ |
| It can be a stack frame number or the address of the frame.\n\ |
| With argument, nothing is printed if input is coming from\n\ |
| a command file or a user-defined command.")); |
| |
| add_com_alias ("f", "frame", class_stack, 1); |
| |
| if (xdb_commands) |
| { |
| add_com ("L", class_stack, current_frame_command, |
| _("Print the current stack frame.\n")); |
| add_com_alias ("V", "frame", class_stack, 1); |
| } |
| add_com ("select-frame", class_stack, select_frame_command, _("\ |
| Select a stack frame without printing anything.\n\ |
| An argument specifies the frame to select.\n\ |
| It can be a stack frame number or the address of the frame.\n")); |
| |
| add_com ("backtrace", class_stack, backtrace_command, _("\ |
| Print backtrace of all stack frames, or innermost COUNT frames.\n\ |
| With a negative argument, print outermost -COUNT frames.\n\ |
| Use of the 'full' qualifier also prints the values of the local variables.\n")); |
| add_com_alias ("bt", "backtrace", class_stack, 0); |
| if (xdb_commands) |
| { |
| add_com_alias ("t", "backtrace", class_stack, 0); |
| add_com ("T", class_stack, backtrace_full_command, _("\ |
| Print backtrace of all stack frames, or innermost COUNT frames \n\ |
| and the values of the local variables.\n\ |
| With a negative argument, print outermost -COUNT frames.\n\ |
| Usage: T <count>\n")); |
| } |
| |
| add_com_alias ("where", "backtrace", class_alias, 0); |
| add_info ("stack", backtrace_command, |
| _("Backtrace of the stack, or innermost COUNT frames.")); |
| add_info_alias ("s", "stack", 1); |
| add_info ("frame", frame_info, |
| _("All about selected stack frame, or frame at ADDR.")); |
| add_info_alias ("f", "frame", 1); |
| add_info ("locals", locals_info, |
| _("Local variables of current stack frame.")); |
| add_info ("args", args_info, |
| _("Argument variables of current stack frame.")); |
| if (xdb_commands) |
| add_com ("l", class_info, args_plus_locals_info, |
| _("Argument and local variables of current stack frame.")); |
| |
| if (dbx_commands) |
| add_com ("func", class_stack, func_command, _("\ |
| Select the stack frame that contains <func>.\n\ |
| Usage: func <name>\n")); |
| |
| add_info ("catch", catch_info, |
| _("Exceptions that can be caught in the current stack frame.")); |
| |
| add_setshow_enum_cmd ("frame-arguments", class_stack, |
| print_frame_arguments_choices, &print_frame_arguments, |
| _("Set printing of non-scalar frame arguments"), |
| _("Show printing of non-scalar frame arguments"), |
| NULL, NULL, NULL, &setprintlist, &showprintlist); |
| |
| #if 0 |
| add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command, _(\ |
| "Specify maximum number of frames for \"backtrace\" to print by default."), |
| &setlist); |
| add_info ("backtrace-limit", backtrace_limit_info, _("\ |
| The maximum number of frames for \"backtrace\" to print by default.")); |
| #endif |
| } |