| /* Print values for GNU debugger GDB. |
| |
| Copyright (C) 1986-2024 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 "event-top.h" |
| #include "extract-store-integer.h" |
| #include "frame.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "top.h" |
| #include "value.h" |
| #include "language.h" |
| #include "c-lang.h" |
| #include "expression.h" |
| #include "gdbcore.h" |
| #include "cli/cli-cmds.h" |
| #include "target.h" |
| #include "breakpoint.h" |
| #include "demangle.h" |
| #include "gdb-demangle.h" |
| #include "valprint.h" |
| #include "annotate.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "completer.h" |
| #include "ui-out.h" |
| #include "block.h" |
| #include "disasm.h" |
| #include "target-float.h" |
| #include "observable.h" |
| #include "solist.h" |
| #include "parser-defs.h" |
| #include "charset.h" |
| #include "arch-utils.h" |
| #include "cli/cli-utils.h" |
| #include "cli/cli-option.h" |
| #include "cli/cli-script.h" |
| #include "cli/cli-style.h" |
| #include "gdbsupport/format.h" |
| #include "source.h" |
| #include "gdbsupport/byte-vector.h" |
| #include <optional> |
| #include "gdbsupport/gdb-safe-ctype.h" |
| #include "gdbsupport/rsp-low.h" |
| #include "inferior.h" |
| |
| /* Chain containing all defined memory-tag subcommands. */ |
| |
| static struct cmd_list_element *memory_tag_list; |
| |
| /* Last specified output format. */ |
| |
| static char last_format = 0; |
| |
| /* Last specified examination size. 'b', 'h', 'w' or `q'. */ |
| |
| static char last_size = 'w'; |
| |
| /* Last specified count for the 'x' command. */ |
| |
| static int last_count; |
| |
| /* Last specified tag-printing option. */ |
| |
| static bool last_print_tags = false; |
| |
| /* Default address to examine next, and associated architecture. */ |
| |
| static struct gdbarch *next_gdbarch; |
| static CORE_ADDR next_address; |
| |
| /* Number of delay instructions following current disassembled insn. */ |
| |
| static int branch_delay_insns; |
| |
| /* Last address examined. */ |
| |
| static CORE_ADDR last_examine_address; |
| |
| /* Contents of last address examined. |
| This is not valid past the end of the `x' command! */ |
| |
| static value_ref_ptr last_examine_value; |
| |
| /* Largest offset between a symbolic value and an address, that will be |
| printed as `0x1234 <symbol+offset>'. */ |
| |
| static unsigned int max_symbolic_offset = UINT_MAX; |
| static void |
| show_max_symbolic_offset (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| gdb_printf (file, |
| _("The largest offset that will be " |
| "printed in <symbol+1234> form is %s.\n"), |
| value); |
| } |
| |
| /* Append the source filename and linenumber of the symbol when |
| printing a symbolic value as `<symbol at filename:linenum>' if set. */ |
| static bool print_symbol_filename = false; |
| static void |
| show_print_symbol_filename (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| gdb_printf (file, _("Printing of source filename and " |
| "line number with <symbol> is %s.\n"), |
| value); |
| } |
| |
| /* Number of auto-display expression currently being displayed. |
| So that we can disable it if we get a signal within it. |
| -1 when not doing one. */ |
| |
| static int current_display_number; |
| |
| /* Last allocated display number. */ |
| |
| static int display_number; |
| |
| struct display |
| { |
| display (const char *exp_string_, expression_up &&exp_, |
| const struct format_data &format_, struct program_space *pspace_, |
| const struct block *block_) |
| : exp_string (exp_string_), |
| exp (std::move (exp_)), |
| number (++display_number), |
| format (format_), |
| pspace (pspace_), |
| block (block_), |
| enabled_p (true) |
| { |
| } |
| |
| /* The expression as the user typed it. */ |
| std::string exp_string; |
| |
| /* Expression to be evaluated and displayed. */ |
| expression_up exp; |
| |
| /* Item number of this auto-display item. */ |
| int number; |
| |
| /* Display format specified. */ |
| struct format_data format; |
| |
| /* Program space associated with `block'. */ |
| struct program_space *pspace; |
| |
| /* Innermost block required by this expression when evaluated. */ |
| const struct block *block; |
| |
| /* Status of this display (enabled or disabled). */ |
| bool enabled_p; |
| }; |
| |
| /* Expressions whose values should be displayed automatically each |
| time the program stops. */ |
| |
| static std::vector<std::unique_ptr<struct display>> all_displays; |
| |
| /* Prototypes for local functions. */ |
| |
| static void do_one_display (struct display *); |
| |
| |
| /* Decode a format specification. *STRING_PTR should point to it. |
| OFORMAT and OSIZE are used as defaults for the format and size |
| if none are given in the format specification. |
| If OSIZE is zero, then the size field of the returned value |
| should be set only if a size is explicitly specified by the |
| user. |
| The structure returned describes all the data |
| found in the specification. In addition, *STRING_PTR is advanced |
| past the specification and past all whitespace following it. */ |
| |
| static struct format_data |
| decode_format (const char **string_ptr, int oformat, int osize) |
| { |
| struct format_data val; |
| const char *p = *string_ptr; |
| |
| val.format = '?'; |
| val.size = '?'; |
| val.count = 1; |
| val.raw = 0; |
| val.print_tags = false; |
| |
| if (*p == '-') |
| { |
| val.count = -1; |
| p++; |
| } |
| if (*p >= '0' && *p <= '9') |
| val.count *= atoi (p); |
| while (*p >= '0' && *p <= '9') |
| p++; |
| |
| /* Now process size or format letters that follow. */ |
| |
| while (1) |
| { |
| if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') |
| val.size = *p++; |
| else if (*p == 'r') |
| { |
| val.raw = 1; |
| p++; |
| } |
| else if (*p == 'm') |
| { |
| val.print_tags = true; |
| p++; |
| } |
| else if (*p >= 'a' && *p <= 'z') |
| val.format = *p++; |
| else |
| break; |
| } |
| |
| *string_ptr = skip_spaces (p); |
| |
| /* Set defaults for format and size if not specified. */ |
| if (val.format == '?') |
| { |
| if (val.size == '?') |
| { |
| /* Neither has been specified. */ |
| val.format = oformat; |
| val.size = osize; |
| } |
| else |
| /* If a size is specified, any format makes a reasonable |
| default except 'i'. */ |
| val.format = oformat == 'i' ? 'x' : oformat; |
| } |
| else if (val.size == '?') |
| switch (val.format) |
| { |
| case 'a': |
| /* Pick the appropriate size for an address. This is deferred |
| until do_examine when we know the actual architecture to use. |
| A special size value of 'a' is used to indicate this case. */ |
| val.size = osize ? 'a' : osize; |
| break; |
| case 'f': |
| /* Floating point has to be word or giantword. */ |
| if (osize == 'w' || osize == 'g') |
| val.size = osize; |
| else |
| /* Default it to giantword if the last used size is not |
| appropriate. */ |
| val.size = osize ? 'g' : osize; |
| break; |
| case 'c': |
| /* Characters default to one byte. */ |
| val.size = osize ? 'b' : osize; |
| break; |
| case 's': |
| /* Display strings with byte size chars unless explicitly |
| specified. */ |
| val.size = '\0'; |
| break; |
| |
| default: |
| /* The default is the size most recently specified. */ |
| val.size = osize; |
| } |
| |
| return val; |
| } |
| |
| /* Print value VAL on stream according to OPTIONS. |
| Do not end with a newline. |
| SIZE is the letter for the size of datum being printed. |
| This is used to pad hex numbers so they line up. SIZE is 0 |
| for print / output and set for examine. */ |
| |
| static void |
| print_formatted (struct value *val, int size, |
| const struct value_print_options *options, |
| struct ui_file *stream) |
| { |
| struct type *type = check_typedef (val->type ()); |
| int len = type->length (); |
| |
| if (val->lval () == lval_memory) |
| next_address = val->address () + len; |
| |
| if (size) |
| { |
| switch (options->format) |
| { |
| case 's': |
| { |
| struct type *elttype = val->type (); |
| |
| next_address = (val->address () |
| + val_print_string (elttype, NULL, |
| val->address (), -1, |
| stream, options) * len); |
| } |
| return; |
| |
| case 'i': |
| /* We often wrap here if there are long symbolic names. */ |
| stream->wrap_here (4); |
| next_address = (val->address () |
| + gdb_print_insn (type->arch (), |
| val->address (), stream, |
| &branch_delay_insns)); |
| return; |
| } |
| } |
| |
| if (options->format == 0 || options->format == 's' |
| || type->code () == TYPE_CODE_VOID |
| || type->code () == TYPE_CODE_REF |
| || type->code () == TYPE_CODE_ARRAY |
| || type->code () == TYPE_CODE_STRING |
| || type->code () == TYPE_CODE_STRUCT |
| || type->code () == TYPE_CODE_UNION |
| || type->code () == TYPE_CODE_NAMESPACE) |
| value_print (val, stream, options); |
| else |
| /* User specified format, so don't look to the type to tell us |
| what to do. */ |
| value_print_scalar_formatted (val, options, size, stream); |
| } |
| |
| /* Return builtin floating point type of same length as TYPE. |
| If no such type is found, return TYPE itself. */ |
| static struct type * |
| float_type_from_length (struct type *type) |
| { |
| struct gdbarch *gdbarch = type->arch (); |
| const struct builtin_type *builtin = builtin_type (gdbarch); |
| |
| if (type->length () == builtin->builtin_half->length ()) |
| type = builtin->builtin_half; |
| else if (type->length () == builtin->builtin_float->length ()) |
| type = builtin->builtin_float; |
| else if (type->length () == builtin->builtin_double->length ()) |
| type = builtin->builtin_double; |
| else if (type->length () == builtin->builtin_long_double->length ()) |
| type = builtin->builtin_long_double; |
| |
| return type; |
| } |
| |
| /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, |
| according to OPTIONS and SIZE on STREAM. Formats s and i are not |
| supported at this level. */ |
| |
| void |
| print_scalar_formatted (const gdb_byte *valaddr, struct type *type, |
| const struct value_print_options *options, |
| int size, struct ui_file *stream) |
| { |
| struct gdbarch *gdbarch = type->arch (); |
| unsigned int len = type->length (); |
| enum bfd_endian byte_order = type_byte_order (type); |
| |
| /* String printing should go through val_print_scalar_formatted. */ |
| gdb_assert (options->format != 's'); |
| |
| /* If the value is a pointer, and pointers and addresses are not the |
| same, then at this point, the value's length (in target bytes) is |
| gdbarch_addr_bit/TARGET_CHAR_BIT, not type->length (). */ |
| if (type->code () == TYPE_CODE_PTR) |
| len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT; |
| |
| /* If we are printing it as unsigned, truncate it in case it is actually |
| a negative signed value (e.g. "print/u (short)-1" should print 65535 |
| (if shorts are 16 bits) instead of 4294967295). */ |
| if (options->format != 'c' |
| && (options->format != 'd' || type->is_unsigned ())) |
| { |
| if (len < type->length () && byte_order == BFD_ENDIAN_BIG) |
| valaddr += type->length () - len; |
| } |
| |
| /* Allow LEN == 0, and in this case, don't assume that VALADDR is |
| valid. */ |
| const gdb_byte zero = 0; |
| if (len == 0) |
| { |
| len = 1; |
| valaddr = &zero; |
| } |
| |
| if (size != 0 && (options->format == 'x' || options->format == 't')) |
| { |
| /* Truncate to fit. */ |
| unsigned newlen; |
| switch (size) |
| { |
| case 'b': |
| newlen = 1; |
| break; |
| case 'h': |
| newlen = 2; |
| break; |
| case 'w': |
| newlen = 4; |
| break; |
| case 'g': |
| newlen = 8; |
| break; |
| default: |
| error (_("Undefined output size \"%c\"."), size); |
| } |
| if (newlen < len && byte_order == BFD_ENDIAN_BIG) |
| valaddr += len - newlen; |
| len = newlen; |
| } |
| |
| /* Biased range types and sub-word scalar types must be handled |
| here; the value is correctly computed by unpack_long. */ |
| gdb::byte_vector converted_bytes; |
| /* Some cases below will unpack the value again. In the biased |
| range case, we want to avoid this, so we store the unpacked value |
| here for possible use later. */ |
| std::optional<LONGEST> val_long; |
| if ((is_fixed_point_type (type) |
| && (options->format == 'o' |
| || options->format == 'x' |
| || options->format == 't' |
| || options->format == 'z' |
| || options->format == 'd' |
| || options->format == 'u')) |
| || (type->code () == TYPE_CODE_RANGE && type->bounds ()->bias != 0) |
| || type->bit_size_differs_p ()) |
| { |
| val_long.emplace (unpack_long (type, valaddr)); |
| converted_bytes.resize (type->length ()); |
| store_signed_integer (converted_bytes.data (), type->length (), |
| byte_order, *val_long); |
| valaddr = converted_bytes.data (); |
| } |
| |
| /* Printing a non-float type as 'f' will interpret the data as if it were |
| of a floating-point type of the same length, if that exists. Otherwise, |
| the data is printed as integer. */ |
| char format = options->format; |
| if (format == 'f' && type->code () != TYPE_CODE_FLT) |
| { |
| type = float_type_from_length (type); |
| if (type->code () != TYPE_CODE_FLT) |
| format = 0; |
| } |
| |
| switch (format) |
| { |
| case 'o': |
| print_octal_chars (stream, valaddr, len, byte_order); |
| break; |
| case 'd': |
| print_decimal_chars (stream, valaddr, len, true, byte_order); |
| break; |
| case 'u': |
| print_decimal_chars (stream, valaddr, len, false, byte_order); |
| break; |
| case 0: |
| if (type->code () != TYPE_CODE_FLT) |
| { |
| print_decimal_chars (stream, valaddr, len, !type->is_unsigned (), |
| byte_order); |
| break; |
| } |
| [[fallthrough]]; |
| case 'f': |
| print_floating (valaddr, type, stream); |
| break; |
| |
| case 't': |
| print_binary_chars (stream, valaddr, len, byte_order, size > 0, options); |
| break; |
| case 'x': |
| print_hex_chars (stream, valaddr, len, byte_order, size > 0); |
| break; |
| case 'z': |
| print_hex_chars (stream, valaddr, len, byte_order, true); |
| break; |
| case 'c': |
| { |
| struct value_print_options opts = *options; |
| |
| if (!val_long.has_value ()) |
| val_long.emplace (unpack_long (type, valaddr)); |
| |
| opts.format = 0; |
| if (type->is_unsigned ()) |
| type = builtin_type (gdbarch)->builtin_true_unsigned_char; |
| else |
| type = builtin_type (gdbarch)->builtin_true_char; |
| |
| value_print (value_from_longest (type, *val_long), stream, &opts); |
| } |
| break; |
| |
| case 'a': |
| { |
| if (!val_long.has_value ()) |
| val_long.emplace (unpack_long (type, valaddr)); |
| print_address (gdbarch, *val_long, stream); |
| } |
| break; |
| |
| default: |
| error (_("Undefined output format \"%c\"."), format); |
| } |
| } |
| |
| /* Specify default address for `x' command. |
| The `info lines' command uses this. */ |
| |
| void |
| set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr) |
| { |
| struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
| |
| next_gdbarch = gdbarch; |
| next_address = addr; |
| |
| /* Make address available to the user as $_. */ |
| set_internalvar (lookup_internalvar ("_"), |
| value_from_pointer (ptr_type, addr)); |
| } |
| |
| /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, |
| after LEADIN. Print nothing if no symbolic name is found nearby. |
| Optionally also print source file and line number, if available. |
| DO_DEMANGLE controls whether to print a symbol in its native "raw" form, |
| or to interpret it as a possible C++ name and convert it back to source |
| form. However note that DO_DEMANGLE can be overridden by the specific |
| settings of the demangle and asm_demangle variables. Returns |
| non-zero if anything was printed; zero otherwise. */ |
| |
| int |
| print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr, |
| struct ui_file *stream, |
| int do_demangle, const char *leadin) |
| { |
| std::string name, filename; |
| int unmapped = 0; |
| int offset = 0; |
| int line = 0; |
| |
| if (build_address_symbolic (gdbarch, addr, do_demangle, false, &name, |
| &offset, &filename, &line, &unmapped)) |
| return 0; |
| |
| gdb_puts (leadin, stream); |
| if (unmapped) |
| gdb_puts ("<*", stream); |
| else |
| gdb_puts ("<", stream); |
| fputs_styled (name.c_str (), function_name_style.style (), stream); |
| if (offset != 0) |
| gdb_printf (stream, "%+d", offset); |
| |
| /* Append source filename and line number if desired. Give specific |
| line # of this addr, if we have it; else line # of the nearest symbol. */ |
| if (print_symbol_filename && !filename.empty ()) |
| { |
| gdb_puts (line == -1 ? " in " : " at ", stream); |
| fputs_styled (filename.c_str (), file_name_style.style (), stream); |
| if (line != -1) |
| gdb_printf (stream, ":%d", line); |
| } |
| if (unmapped) |
| gdb_puts ("*>", stream); |
| else |
| gdb_puts (">", stream); |
| |
| return 1; |
| } |
| |
| /* See valprint.h. */ |
| |
| int |
| build_address_symbolic (struct gdbarch *gdbarch, |
| CORE_ADDR addr, /* IN */ |
| bool do_demangle, /* IN */ |
| bool prefer_sym_over_minsym, /* IN */ |
| std::string *name, /* OUT */ |
| int *offset, /* OUT */ |
| std::string *filename, /* OUT */ |
| int *line, /* OUT */ |
| int *unmapped) /* OUT */ |
| { |
| struct symbol *symbol; |
| CORE_ADDR name_location = 0; |
| struct obj_section *section = NULL; |
| const char *name_temp = ""; |
| |
| /* Let's say it is mapped (not unmapped). */ |
| *unmapped = 0; |
| |
| /* Determine if the address is in an overlay, and whether it is |
| mapped. */ |
| if (overlay_debugging) |
| { |
| section = find_pc_overlay (addr); |
| if (pc_in_unmapped_range (addr, section)) |
| { |
| *unmapped = 1; |
| addr = overlay_mapped_address (addr, section); |
| } |
| } |
| |
| /* Try to find the address in both the symbol table and the minsyms. |
| In most cases, we'll prefer to use the symbol instead of the |
| minsym. However, there are cases (see below) where we'll choose |
| to use the minsym instead. */ |
| |
| /* This is defective in the sense that it only finds text symbols. So |
| really this is kind of pointless--we should make sure that the |
| minimal symbols have everything we need (by changing that we could |
| save some memory, but for many debug format--ELF/DWARF or |
| anything/stabs--it would be inconvenient to eliminate those minimal |
| symbols anyway). */ |
| bound_minimal_symbol msymbol |
| = lookup_minimal_symbol_by_pc_section (addr, section); |
| symbol = find_pc_sect_function (addr, section); |
| |
| if (symbol) |
| { |
| /* If this is a function (i.e. a code address), strip out any |
| non-address bits. For instance, display a pointer to the |
| first instruction of a Thumb function as <function>; the |
| second instruction will be <function+2>, even though the |
| pointer is <function+3>. This matches the ISA behavior. */ |
| addr = gdbarch_addr_bits_remove (gdbarch, addr); |
| |
| name_location = symbol->value_block ()->entry_pc (); |
| if (do_demangle || asm_demangle) |
| name_temp = symbol->print_name (); |
| else |
| name_temp = symbol->linkage_name (); |
| } |
| |
| if (msymbol.minsym != NULL |
| && msymbol.minsym->has_size () |
| && msymbol.minsym->size () == 0 |
| && msymbol.minsym->type () != mst_text |
| && msymbol.minsym->type () != mst_text_gnu_ifunc |
| && msymbol.minsym->type () != mst_file_text) |
| msymbol.minsym = NULL; |
| |
| if (msymbol.minsym != NULL) |
| { |
| /* Use the minsym if no symbol is found. |
| |
| Additionally, use the minsym instead of a (found) symbol if |
| the following conditions all hold: |
| 1) The prefer_sym_over_minsym flag is false. |
| 2) The minsym address is identical to that of the address under |
| consideration. |
| 3) The symbol address is not identical to that of the address |
| under consideration. */ |
| if (symbol == NULL || |
| (!prefer_sym_over_minsym |
| && msymbol.value_address () == addr |
| && name_location != addr)) |
| { |
| /* If this is a function (i.e. a code address), strip out any |
| non-address bits. For instance, display a pointer to the |
| first instruction of a Thumb function as <function>; the |
| second instruction will be <function+2>, even though the |
| pointer is <function+3>. This matches the ISA behavior. */ |
| if (msymbol.minsym->type () == mst_text |
| || msymbol.minsym->type () == mst_text_gnu_ifunc |
| || msymbol.minsym->type () == mst_file_text |
| || msymbol.minsym->type () == mst_solib_trampoline) |
| addr = gdbarch_addr_bits_remove (gdbarch, addr); |
| |
| symbol = 0; |
| name_location = msymbol.value_address (); |
| if (do_demangle || asm_demangle) |
| name_temp = msymbol.minsym->print_name (); |
| else |
| name_temp = msymbol.minsym->linkage_name (); |
| } |
| } |
| if (symbol == NULL && msymbol.minsym == NULL) |
| return 1; |
| |
| /* If the nearest symbol is too far away, don't print anything symbolic. */ |
| |
| /* For when CORE_ADDR is larger than unsigned int, we do math in |
| CORE_ADDR. But when we detect unsigned wraparound in the |
| CORE_ADDR math, we ignore this test and print the offset, |
| because addr+max_symbolic_offset has wrapped through the end |
| of the address space back to the beginning, giving bogus comparison. */ |
| if (addr > name_location + max_symbolic_offset |
| && name_location + max_symbolic_offset > name_location) |
| return 1; |
| |
| *offset = (LONGEST) addr - name_location; |
| |
| *name = name_temp; |
| |
| if (print_symbol_filename) |
| { |
| struct symtab_and_line sal; |
| |
| sal = find_pc_sect_line (addr, section, 0); |
| |
| if (sal.symtab) |
| { |
| *filename = symtab_to_filename_for_display (sal.symtab); |
| *line = sal.line; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* Print address ADDR symbolically on STREAM. |
| First print it as a number. Then perhaps print |
| <SYMBOL + OFFSET> after the number. */ |
| |
| void |
| print_address (struct gdbarch *gdbarch, |
| CORE_ADDR addr, struct ui_file *stream) |
| { |
| fputs_styled (paddress (gdbarch, addr), address_style.style (), stream); |
| print_address_symbolic (gdbarch, addr, stream, asm_demangle, " "); |
| } |
| |
| /* Return a prefix for instruction address: |
| "=> " for current instruction, else " ". */ |
| |
| const char * |
| pc_prefix (CORE_ADDR addr) |
| { |
| if (has_stack_frames ()) |
| { |
| frame_info_ptr frame; |
| CORE_ADDR pc; |
| |
| frame = get_selected_frame (NULL); |
| if (get_frame_pc_if_available (frame, &pc) && pc == addr) |
| return "=> "; |
| } |
| return " "; |
| } |
| |
| /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE |
| controls whether to print the symbolic name "raw" or demangled. |
| Return non-zero if anything was printed; zero otherwise. */ |
| |
| int |
| print_address_demangle (const struct value_print_options *opts, |
| struct gdbarch *gdbarch, CORE_ADDR addr, |
| struct ui_file *stream, int do_demangle) |
| { |
| if (opts->addressprint) |
| { |
| fputs_styled (paddress (gdbarch, addr), address_style.style (), stream); |
| print_address_symbolic (gdbarch, addr, stream, do_demangle, " "); |
| } |
| else |
| { |
| return print_address_symbolic (gdbarch, addr, stream, do_demangle, ""); |
| } |
| return 1; |
| } |
| |
| |
| /* Find the address of the instruction that is INST_COUNT instructions before |
| the instruction at ADDR. |
| Since some architectures have variable-length instructions, we can't just |
| simply subtract INST_COUNT * INSN_LEN from ADDR. Instead, we use line |
| number information to locate the nearest known instruction boundary, |
| and disassemble forward from there. If we go out of the symbol range |
| during disassembling, we return the lowest address we've got so far and |
| set the number of instructions read to INST_READ. */ |
| |
| static CORE_ADDR |
| find_instruction_backward (struct gdbarch *gdbarch, CORE_ADDR addr, |
| int inst_count, int *inst_read) |
| { |
| /* The vector PCS is used to store instruction addresses within |
| a pc range. */ |
| CORE_ADDR loop_start, loop_end, p; |
| std::vector<CORE_ADDR> pcs; |
| struct symtab_and_line sal; |
| |
| *inst_read = 0; |
| loop_start = loop_end = addr; |
| |
| /* In each iteration of the outer loop, we get a pc range that ends before |
| LOOP_START, then we count and store every instruction address of the range |
| iterated in the loop. |
| If the number of instructions counted reaches INST_COUNT, return the |
| stored address that is located INST_COUNT instructions back from ADDR. |
| If INST_COUNT is not reached, we subtract the number of counted |
| instructions from INST_COUNT, and go to the next iteration. */ |
| do |
| { |
| pcs.clear (); |
| sal = find_pc_sect_line (loop_start, NULL, 1); |
| if (sal.line <= 0) |
| { |
| /* We reach here when line info is not available. In this case, |
| we print a message and just exit the loop. The return value |
| is calculated after the loop. */ |
| gdb_printf (_("No line number information available " |
| "for address ")); |
| gdb_stdout->wrap_here (2); |
| print_address (gdbarch, loop_start - 1, gdb_stdout); |
| gdb_printf ("\n"); |
| break; |
| } |
| |
| loop_end = loop_start; |
| loop_start = sal.pc; |
| |
| /* This loop pushes instruction addresses in the range from |
| LOOP_START to LOOP_END. */ |
| for (p = loop_start; p < loop_end;) |
| { |
| pcs.push_back (p); |
| p += gdb_insn_length (gdbarch, p); |
| } |
| |
| inst_count -= pcs.size (); |
| *inst_read += pcs.size (); |
| } |
| while (inst_count > 0); |
| |
| /* After the loop, the vector PCS has instruction addresses of the last |
| source line we processed, and INST_COUNT has a negative value. |
| We return the address at the index of -INST_COUNT in the vector for |
| the reason below. |
| Let's assume the following instruction addresses and run 'x/-4i 0x400e'. |
| Line X of File |
| 0x4000 |
| 0x4001 |
| 0x4005 |
| Line Y of File |
| 0x4009 |
| 0x400c |
| => 0x400e |
| 0x4011 |
| find_instruction_backward is called with INST_COUNT = 4 and expected to |
| return 0x4001. When we reach here, INST_COUNT is set to -1 because |
| it was subtracted by 2 (from Line Y) and 3 (from Line X). The value |
| 4001 is located at the index 1 of the last iterated line (= Line X), |
| which is simply calculated by -INST_COUNT. |
| The case when the length of PCS is 0 means that we reached an area for |
| which line info is not available. In such case, we return LOOP_START, |
| which was the lowest instruction address that had line info. */ |
| p = pcs.size () > 0 ? pcs[-inst_count] : loop_start; |
| |
| /* INST_READ includes all instruction addresses in a pc range. Need to |
| exclude the beginning part up to the address we're returning. That |
| is, exclude {0x4000} in the example above. */ |
| if (inst_count < 0) |
| *inst_read += inst_count; |
| |
| return p; |
| } |
| |
| /* Backward read LEN bytes of target memory from address MEMADDR + LEN, |
| placing the results in GDB's memory from MYADDR + LEN. Returns |
| a count of the bytes actually read. */ |
| |
| static int |
| read_memory_backward (struct gdbarch *gdbarch, |
| CORE_ADDR memaddr, gdb_byte *myaddr, int len) |
| { |
| int errcode; |
| int nread; /* Number of bytes actually read. */ |
| |
| /* First try a complete read. */ |
| errcode = target_read_memory (memaddr, myaddr, len); |
| if (errcode == 0) |
| { |
| /* Got it all. */ |
| nread = len; |
| } |
| else |
| { |
| /* Loop, reading one byte at a time until we get as much as we can. */ |
| memaddr += len; |
| myaddr += len; |
| for (nread = 0; nread < len; ++nread) |
| { |
| errcode = target_read_memory (--memaddr, --myaddr, 1); |
| if (errcode != 0) |
| { |
| /* The read was unsuccessful, so exit the loop. */ |
| gdb_printf (_("Cannot access memory at address %s\n"), |
| paddress (gdbarch, memaddr)); |
| break; |
| } |
| } |
| } |
| return nread; |
| } |
| |
| /* Returns true if X (which is LEN bytes wide) is the number zero. */ |
| |
| static int |
| integer_is_zero (const gdb_byte *x, int len) |
| { |
| int i = 0; |
| |
| while (i < len && x[i] == 0) |
| ++i; |
| return (i == len); |
| } |
| |
| /* Find the start address of a string in which ADDR is included. |
| Basically we search for '\0' and return the next address, |
| but if OPTIONS->PRINT_MAX is smaller than the length of a string, |
| we stop searching and return the address to print characters as many as |
| PRINT_MAX from the string. */ |
| |
| static CORE_ADDR |
| find_string_backward (struct gdbarch *gdbarch, |
| CORE_ADDR addr, int count, int char_size, |
| const struct value_print_options *options, |
| int *strings_counted) |
| { |
| const int chunk_size = 0x20; |
| int read_error = 0; |
| int chars_read = 0; |
| int chars_to_read = chunk_size; |
| int chars_counted = 0; |
| int count_original = count; |
| CORE_ADDR string_start_addr = addr; |
| |
| gdb_assert (char_size == 1 || char_size == 2 || char_size == 4); |
| gdb::byte_vector buffer (chars_to_read * char_size); |
| while (count > 0 && read_error == 0) |
| { |
| int i; |
| |
| addr -= chars_to_read * char_size; |
| chars_read = read_memory_backward (gdbarch, addr, buffer.data (), |
| chars_to_read * char_size); |
| chars_read /= char_size; |
| read_error = (chars_read == chars_to_read) ? 0 : 1; |
| unsigned int print_max_chars = get_print_max_chars (options); |
| /* Searching for '\0' from the end of buffer in backward direction. */ |
| for (i = 0; i < chars_read && count > 0 ; ++i, ++chars_counted) |
| { |
| int offset = (chars_to_read - i - 1) * char_size; |
| |
| if (integer_is_zero (&buffer[offset], char_size) |
| || chars_counted == print_max_chars) |
| { |
| /* Found '\0' or reached `print_max_chars'. As OFFSET |
| is the offset to '\0', we add CHAR_SIZE to return |
| the start address of a string. */ |
| --count; |
| string_start_addr = addr + offset + char_size; |
| chars_counted = 0; |
| } |
| } |
| } |
| |
| /* Update STRINGS_COUNTED with the actual number of loaded strings. */ |
| *strings_counted = count_original - count; |
| |
| if (read_error != 0) |
| { |
| /* In error case, STRING_START_ADDR is pointing to the string that |
| was last successfully loaded. Rewind the partially loaded string. */ |
| string_start_addr -= chars_counted * char_size; |
| } |
| |
| return string_start_addr; |
| } |
| |
| /* Examine data at address ADDR in format FMT. |
| Fetch it from memory and print on gdb_stdout. */ |
| |
| static void |
| do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr) |
| { |
| char format = 0; |
| char size; |
| int count = 1; |
| struct type *val_type = NULL; |
| int i; |
| int maxelts; |
| struct value_print_options opts; |
| int need_to_update_next_address = 0; |
| CORE_ADDR addr_rewound = 0; |
| |
| format = fmt.format; |
| size = fmt.size; |
| count = fmt.count; |
| next_gdbarch = gdbarch; |
| next_address = addr; |
| |
| /* Instruction format implies fetch single bytes |
| regardless of the specified size. |
| The case of strings is handled in decode_format, only explicit |
| size operator are not changed to 'b'. */ |
| if (format == 'i') |
| size = 'b'; |
| |
| if (size == 'a') |
| { |
| /* Pick the appropriate size for an address. */ |
| if (gdbarch_ptr_bit (next_gdbarch) == 64) |
| size = 'g'; |
| else if (gdbarch_ptr_bit (next_gdbarch) == 32) |
| size = 'w'; |
| else if (gdbarch_ptr_bit (next_gdbarch) == 16) |
| size = 'h'; |
| else |
| /* Bad value for gdbarch_ptr_bit. */ |
| internal_error (_("failed internal consistency check")); |
| } |
| |
| if (size == 'b') |
| val_type = builtin_type (next_gdbarch)->builtin_int8; |
| else if (size == 'h') |
| val_type = builtin_type (next_gdbarch)->builtin_int16; |
| else if (size == 'w') |
| val_type = builtin_type (next_gdbarch)->builtin_int32; |
| else if (size == 'g') |
| val_type = builtin_type (next_gdbarch)->builtin_int64; |
| |
| if (format == 's') |
| { |
| struct type *char_type = NULL; |
| |
| /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char |
| if type is not found. */ |
| if (size == 'h') |
| char_type = builtin_type (next_gdbarch)->builtin_char16; |
| else if (size == 'w') |
| char_type = builtin_type (next_gdbarch)->builtin_char32; |
| if (char_type) |
| val_type = char_type; |
| else |
| { |
| if (size != '\0' && size != 'b') |
| warning (_("Unable to display strings with " |
| "size '%c', using 'b' instead."), size); |
| size = 'b'; |
| val_type = builtin_type (next_gdbarch)->builtin_int8; |
| } |
| } |
| |
| maxelts = 8; |
| if (size == 'w') |
| maxelts = 4; |
| if (size == 'g') |
| maxelts = 2; |
| if (format == 's' || format == 'i') |
| maxelts = 1; |
| |
| get_formatted_print_options (&opts, format); |
| |
| if (count < 0) |
| { |
| /* This is the negative repeat count case. |
| We rewind the address based on the given repeat count and format, |
| then examine memory from there in forward direction. */ |
| |
| count = -count; |
| if (format == 'i') |
| { |
| next_address = find_instruction_backward (gdbarch, addr, count, |
| &count); |
| } |
| else if (format == 's') |
| { |
| next_address = find_string_backward (gdbarch, addr, count, |
| val_type->length (), |
| &opts, &count); |
| } |
| else |
| { |
| next_address = addr - count * val_type->length (); |
| } |
| |
| /* The following call to print_formatted updates next_address in every |
| iteration. In backward case, we store the start address here |
| and update next_address with it before exiting the function. */ |
| addr_rewound = (format == 's' |
| ? next_address - val_type->length () |
| : next_address); |
| need_to_update_next_address = 1; |
| } |
| |
| /* Whether we need to print the memory tag information for the current |
| address range. */ |
| bool print_range_tag = true; |
| uint32_t gsize = gdbarch_memtag_granule_size (gdbarch); |
| |
| /* Print as many objects as specified in COUNT, at most maxelts per line, |
| with the address of the next one at the start of each line. */ |
| |
| while (count > 0) |
| { |
| QUIT; |
| |
| CORE_ADDR tag_laddr = 0, tag_haddr = 0; |
| |
| /* Print the memory tag information if requested. */ |
| if (fmt.print_tags && print_range_tag |
| && target_supports_memory_tagging ()) |
| { |
| tag_laddr = align_down (next_address, gsize); |
| tag_haddr = align_down (next_address + gsize, gsize); |
| |
| struct value *v_addr |
| = value_from_ulongest (builtin_type (gdbarch)->builtin_data_ptr, |
| tag_laddr); |
| |
| if (target_is_address_tagged (gdbarch, value_as_address (v_addr))) |
| { |
| /* Fetch the allocation tag. */ |
| struct value *tag |
| = gdbarch_get_memtag (gdbarch, v_addr, memtag_type::allocation); |
| std::string atag |
| = gdbarch_memtag_to_string (gdbarch, tag); |
| |
| if (!atag.empty ()) |
| { |
| gdb_printf (_("<Allocation Tag %s for range [%s,%s)>\n"), |
| atag.c_str (), |
| paddress (gdbarch, tag_laddr), |
| paddress (gdbarch, tag_haddr)); |
| } |
| } |
| print_range_tag = false; |
| } |
| |
| if (format == 'i') |
| gdb_puts (pc_prefix (next_address)); |
| print_address (next_gdbarch, next_address, gdb_stdout); |
| gdb_printf (":"); |
| for (i = maxelts; |
| i > 0 && count > 0; |
| i--, count--) |
| { |
| gdb_printf ("\t"); |
| /* Note that print_formatted sets next_address for the next |
| object. */ |
| last_examine_address = next_address; |
| |
| /* The value to be displayed is not fetched greedily. |
| Instead, to avoid the possibility of a fetched value not |
| being used, its retrieval is delayed until the print code |
| uses it. When examining an instruction stream, the |
| disassembler will perform its own memory fetch using just |
| the address stored in LAST_EXAMINE_VALUE. FIXME: Should |
| the disassembler be modified so that LAST_EXAMINE_VALUE |
| is left with the byte sequence from the last complete |
| instruction fetched from memory? */ |
| last_examine_value |
| = release_value (value_at_lazy (val_type, next_address)); |
| |
| print_formatted (last_examine_value.get (), size, &opts, gdb_stdout); |
| |
| /* Display any branch delay slots following the final insn. */ |
| if (format == 'i' && count == 1) |
| count += branch_delay_insns; |
| |
| /* Update the tag range based on the current address being |
| processed. */ |
| if (tag_haddr <= next_address) |
| print_range_tag = true; |
| } |
| gdb_printf ("\n"); |
| } |
| |
| if (need_to_update_next_address) |
| next_address = addr_rewound; |
| } |
| |
| static void |
| validate_format (struct format_data fmt, const char *cmdname) |
| { |
| if (fmt.size != 0) |
| error (_("Size letters are meaningless in \"%s\" command."), cmdname); |
| if (fmt.count != 1) |
| error (_("Item count other than 1 is meaningless in \"%s\" command."), |
| cmdname); |
| if (fmt.format == 'i') |
| error (_("Format letter \"%c\" is meaningless in \"%s\" command."), |
| fmt.format, cmdname); |
| } |
| |
| /* Parse print command format string into *OPTS and update *EXPP. |
| CMDNAME should name the current command. */ |
| |
| void |
| print_command_parse_format (const char **expp, const char *cmdname, |
| value_print_options *opts) |
| { |
| const char *exp = *expp; |
| |
| /* opts->raw value might already have been set by 'set print raw-values' |
| or by using 'print -raw-values'. |
| So, do not set opts->raw to 0, only set it to 1 if /r is given. */ |
| if (exp && *exp == '/') |
| { |
| format_data fmt; |
| |
| exp++; |
| fmt = decode_format (&exp, last_format, 0); |
| validate_format (fmt, cmdname); |
| last_format = fmt.format; |
| |
| opts->format = fmt.format; |
| opts->raw = opts->raw || fmt.raw; |
| } |
| else |
| { |
| opts->format = 0; |
| } |
| |
| *expp = exp; |
| } |
| |
| /* See valprint.h. */ |
| |
| void |
| print_value (value *val, const value_print_options &opts) |
| { |
| /* This setting allows large arrays to be printed by limiting the |
| number of elements that are loaded into GDB's memory; we only |
| need to load as many array elements as we plan to print. */ |
| scoped_array_length_limiting limit_large_arrays (opts.print_max); |
| |
| int histindex = val->record_latest (); |
| |
| annotate_value_history_begin (histindex, val->type ()); |
| |
| std::string idx = string_printf ("$%d", histindex); |
| gdb_printf ("%ps = ", styled_string (variable_name_style.style (), |
| idx.c_str ())); |
| |
| annotate_value_history_value (); |
| |
| print_formatted (val, 0, &opts, gdb_stdout); |
| gdb_printf ("\n"); |
| |
| annotate_value_history_end (); |
| } |
| |
| /* Returns true if memory tags should be validated. False otherwise. */ |
| |
| static bool |
| should_validate_memtags (gdbarch *gdbarch, struct value *value) |
| { |
| gdb_assert (value != nullptr && value->type () != nullptr); |
| |
| if (!target_supports_memory_tagging ()) |
| return false; |
| |
| enum type_code code = value->type ()->code (); |
| |
| /* Skip non-address values. */ |
| if (code != TYPE_CODE_PTR |
| && !TYPE_IS_REFERENCE (value->type ())) |
| return false; |
| |
| /* OK, we have an address value. Check we have a complete value we |
| can extract. */ |
| if (value->optimized_out () |
| || !value->entirely_available ()) |
| return false; |
| |
| /* We do. Check whether it includes any tags. */ |
| return target_is_address_tagged (gdbarch, value_as_address (value)); |
| } |
| |
| /* Helper for parsing arguments for print_command_1. */ |
| |
| static struct value * |
| process_print_command_args (const char *args, value_print_options *print_opts, |
| bool voidprint) |
| { |
| get_user_print_options (print_opts); |
| /* Override global settings with explicit options, if any. */ |
| auto group = make_value_print_options_def_group (print_opts); |
| gdb::option::process_options |
| (&args, gdb::option::PROCESS_OPTIONS_REQUIRE_DELIMITER, group); |
| |
| print_command_parse_format (&args, "print", print_opts); |
| |
| const char *exp = args; |
| |
| if (exp != nullptr && *exp) |
| { |
| /* This setting allows large arrays to be printed by limiting the |
| number of elements that are loaded into GDB's memory; we only |
| need to load as many array elements as we plan to print. */ |
| scoped_array_length_limiting limit_large_arrays (print_opts->print_max); |
| |
| /* VOIDPRINT is true to indicate that we do want to print a void |
| value, so invert it for parse_expression. */ |
| parser_flags flags = 0; |
| if (!voidprint) |
| flags = PARSER_VOID_CONTEXT; |
| expression_up expr = parse_expression (exp, nullptr, flags); |
| return expr->evaluate (); |
| } |
| |
| return access_value_history (0); |
| } |
| |
| /* Implementation of the "print" and "call" commands. */ |
| |
| static void |
| print_command_1 (const char *args, int voidprint) |
| { |
| value_print_options print_opts; |
| |
| struct value *val = process_print_command_args (args, &print_opts, voidprint); |
| |
| if (voidprint || (val && val->type () && |
| val->type ()->code () != TYPE_CODE_VOID)) |
| { |
| /* If memory tagging validation is on, check if the tag is valid. */ |
| if (print_opts.memory_tag_violations) |
| { |
| try |
| { |
| gdbarch *arch = current_inferior ()->arch (); |
| |
| if (should_validate_memtags (arch, val) |
| && !gdbarch_memtag_matches_p (arch, val)) |
| { |
| /* Fetch the logical tag. */ |
| struct value *tag |
| = gdbarch_get_memtag (arch, val, memtag_type::logical); |
| std::string ltag = gdbarch_memtag_to_string (arch, tag); |
| |
| /* Fetch the allocation tag. */ |
| tag = gdbarch_get_memtag (arch, val, |
| memtag_type::allocation); |
| std::string atag = gdbarch_memtag_to_string (arch, tag); |
| |
| gdb_printf (_("Logical tag (%s) does not match the " |
| "allocation tag (%s).\n"), |
| ltag.c_str (), atag.c_str ()); |
| } |
| } |
| catch (gdb_exception_error &ex) |
| { |
| if (ex.error == TARGET_CLOSE_ERROR) |
| throw; |
| |
| gdb_printf (gdb_stderr, |
| _("Could not validate memory tag: %s\n"), |
| ex.message->c_str ()); |
| } |
| } |
| |
| print_value (val, print_opts); |
| } |
| } |
| |
| /* See valprint.h. */ |
| |
| void |
| print_command_completer (struct cmd_list_element *ignore, |
| completion_tracker &tracker, |
| const char *text, const char * /*word*/) |
| { |
| const auto group = make_value_print_options_def_group (nullptr); |
| if (gdb::option::complete_options |
| (tracker, &text, gdb::option::PROCESS_OPTIONS_REQUIRE_DELIMITER, group)) |
| return; |
| |
| if (skip_over_slash_fmt (tracker, &text)) |
| return; |
| |
| const char *word = advance_to_expression_complete_word_point (tracker, text); |
| expression_completer (ignore, tracker, text, word); |
| } |
| |
| static void |
| print_command (const char *exp, int from_tty) |
| { |
| print_command_1 (exp, true); |
| } |
| |
| /* Same as print, except it doesn't print void results. */ |
| static void |
| call_command (const char *exp, int from_tty) |
| { |
| print_command_1 (exp, false); |
| } |
| |
| /* Implementation of the "output" command. */ |
| |
| void |
| output_command (const char *exp, int from_tty) |
| { |
| char format = 0; |
| struct value *val; |
| struct format_data fmt; |
| struct value_print_options opts; |
| |
| fmt.size = 0; |
| fmt.raw = 0; |
| |
| if (exp && *exp == '/') |
| { |
| exp++; |
| fmt = decode_format (&exp, 0, 0); |
| validate_format (fmt, "output"); |
| format = fmt.format; |
| } |
| |
| expression_up expr = parse_expression (exp); |
| |
| val = expr->evaluate (); |
| |
| annotate_value_begin (val->type ()); |
| |
| get_formatted_print_options (&opts, format); |
| opts.raw = fmt.raw; |
| |
| /* This setting allows large arrays to be printed by limiting the |
| number of elements that are loaded into GDB's memory; we only |
| need to load as many array elements as we plan to print. */ |
| scoped_array_length_limiting limit_large_arrays (opts.print_max); |
| |
| print_formatted (val, fmt.size, &opts, gdb_stdout); |
| |
| annotate_value_end (); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| static void |
| set_command (const char *exp, int from_tty) |
| { |
| expression_up expr = parse_expression (exp); |
| |
| switch (expr->first_opcode ()) |
| { |
| case UNOP_PREINCREMENT: |
| case UNOP_POSTINCREMENT: |
| case UNOP_PREDECREMENT: |
| case UNOP_POSTDECREMENT: |
| case BINOP_ASSIGN: |
| case BINOP_ASSIGN_MODIFY: |
| case BINOP_COMMA: |
| break; |
| default: |
| warning |
| (_("Expression is not an assignment (and might have no effect)")); |
| } |
| |
| expr->evaluate (); |
| } |
| |
| static void |
| info_symbol_command (const char *arg, int from_tty) |
| { |
| struct minimal_symbol *msymbol; |
| CORE_ADDR addr, sect_addr; |
| int matches = 0; |
| unsigned int offset; |
| |
| if (!arg) |
| error_no_arg (_("address")); |
| |
| addr = parse_and_eval_address (arg); |
| for (objfile *objfile : current_program_space->objfiles ()) |
| for (obj_section *osect : objfile->sections ()) |
| { |
| /* Only process each object file once, even if there's a separate |
| debug file. */ |
| if (objfile->separate_debug_objfile_backlink) |
| continue; |
| |
| sect_addr = overlay_mapped_address (addr, osect); |
| |
| if (osect->contains (sect_addr) |
| && (msymbol |
| = lookup_minimal_symbol_by_pc_section (sect_addr, |
| osect).minsym)) |
| { |
| const char *obj_name, *mapped, *sec_name, *msym_name; |
| const char *loc_string; |
| |
| matches = 1; |
| offset = sect_addr - msymbol->value_address (objfile); |
| mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped"); |
| sec_name = osect->the_bfd_section->name; |
| msym_name = msymbol->print_name (); |
| |
| /* Don't print the offset if it is zero. |
| We assume there's no need to handle i18n of "sym + offset". */ |
| std::string string_holder; |
| if (offset) |
| { |
| string_holder = string_printf ("%s + %u", msym_name, offset); |
| loc_string = string_holder.c_str (); |
| } |
| else |
| loc_string = msym_name; |
| |
| gdb_assert (osect->objfile && objfile_name (osect->objfile)); |
| obj_name = objfile_name (osect->objfile); |
| |
| if (current_program_space->multi_objfile_p ()) |
| if (pc_in_unmapped_range (addr, osect)) |
| if (section_is_overlay (osect)) |
| gdb_printf (_("%s in load address range of " |
| "%s overlay section %s of %s\n"), |
| loc_string, mapped, sec_name, obj_name); |
| else |
| gdb_printf (_("%s in load address range of " |
| "section %s of %s\n"), |
| loc_string, sec_name, obj_name); |
| else |
| if (section_is_overlay (osect)) |
| gdb_printf (_("%s in %s overlay section %s of %s\n"), |
| loc_string, mapped, sec_name, obj_name); |
| else |
| gdb_printf (_("%s in section %s of %s\n"), |
| loc_string, sec_name, obj_name); |
| else |
| if (pc_in_unmapped_range (addr, osect)) |
| if (section_is_overlay (osect)) |
| gdb_printf (_("%s in load address range of %s overlay " |
| "section %s\n"), |
| loc_string, mapped, sec_name); |
| else |
| gdb_printf |
| (_("%s in load address range of section %s\n"), |
| loc_string, sec_name); |
| else |
| if (section_is_overlay (osect)) |
| gdb_printf (_("%s in %s overlay section %s\n"), |
| loc_string, mapped, sec_name); |
| else |
| gdb_printf (_("%s in section %s\n"), |
| loc_string, sec_name); |
| } |
| } |
| if (matches == 0) |
| gdb_printf (_("No symbol matches %s.\n"), arg); |
| } |
| |
| static void |
| info_address_command (const char *exp, int from_tty) |
| { |
| struct gdbarch *gdbarch; |
| int regno; |
| struct symbol *sym; |
| long val; |
| struct obj_section *section; |
| CORE_ADDR load_addr, context_pc = 0; |
| struct field_of_this_result is_a_field_of_this; |
| |
| if (exp == 0) |
| error (_("Argument required.")); |
| |
| sym = lookup_symbol (exp, get_selected_block (&context_pc), SEARCH_VFT, |
| &is_a_field_of_this).symbol; |
| if (sym == NULL) |
| { |
| if (is_a_field_of_this.type != NULL) |
| { |
| gdb_printf ("Symbol \""); |
| fprintf_symbol (gdb_stdout, exp, |
| current_language->la_language, DMGL_ANSI); |
| gdb_printf ("\" is a field of the local class variable "); |
| if (current_language->la_language == language_objc) |
| gdb_printf ("`self'\n"); /* ObjC equivalent of "this" */ |
| else |
| gdb_printf ("`this'\n"); |
| return; |
| } |
| |
| bound_minimal_symbol msymbol |
| = lookup_minimal_symbol (current_program_space, exp); |
| |
| if (msymbol.minsym != NULL) |
| { |
| struct objfile *objfile = msymbol.objfile; |
| |
| gdbarch = objfile->arch (); |
| load_addr = msymbol.value_address (); |
| |
| gdb_printf ("Symbol \""); |
| fprintf_symbol (gdb_stdout, exp, |
| current_language->la_language, DMGL_ANSI); |
| gdb_printf ("\" is at "); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| gdb_printf (" in a file compiled without debugging"); |
| section = msymbol.minsym->obj_section (objfile); |
| if (section_is_overlay (section)) |
| { |
| load_addr = overlay_unmapped_address (load_addr, section); |
| gdb_printf (",\n -- loaded at "); |
| fputs_styled (paddress (gdbarch, load_addr), |
| address_style.style (), |
| gdb_stdout); |
| gdb_printf (" in overlay section %s", |
| section->the_bfd_section->name); |
| } |
| gdb_printf (".\n"); |
| } |
| else |
| error (_("No symbol \"%s\" in current context."), exp); |
| return; |
| } |
| |
| gdb_printf ("Symbol \""); |
| gdb_puts (sym->print_name ()); |
| gdb_printf ("\" is "); |
| val = sym->value_longest (); |
| if (sym->is_objfile_owned ()) |
| section = sym->obj_section (sym->objfile ()); |
| else |
| section = NULL; |
| gdbarch = sym->arch (); |
| |
| if (const symbol_computed_ops *computed_ops = sym->computed_ops (); |
| computed_ops != nullptr) |
| { |
| computed_ops->describe_location (sym, context_pc, gdb_stdout); |
| gdb_printf (".\n"); |
| return; |
| } |
| |
| switch (sym->aclass ()) |
| { |
| case LOC_CONST: |
| case LOC_CONST_BYTES: |
| gdb_printf ("constant"); |
| break; |
| |
| case LOC_LABEL: |
| gdb_printf ("a label at address "); |
| load_addr = sym->value_address (); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| if (section_is_overlay (section)) |
| { |
| load_addr = overlay_unmapped_address (load_addr, section); |
| gdb_printf (",\n -- loaded at "); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| gdb_printf (" in overlay section %s", |
| section->the_bfd_section->name); |
| } |
| break; |
| |
| case LOC_COMPUTED: |
| gdb_assert_not_reached ("LOC_COMPUTED variable missing a method"); |
| |
| case LOC_REGISTER: |
| /* GDBARCH is the architecture associated with the objfile the symbol |
| is defined in; the target architecture may be different, and may |
| provide additional registers. However, we do not know the target |
| architecture at this point. We assume the objfile architecture |
| will contain all the standard registers that occur in debug info |
| in that objfile. */ |
| regno = sym->register_ops ()->register_number (sym, gdbarch); |
| |
| if (sym->is_argument ()) |
| gdb_printf (_("an argument in register %s"), |
| gdbarch_register_name (gdbarch, regno)); |
| else |
| gdb_printf (_("a variable in register %s"), |
| gdbarch_register_name (gdbarch, regno)); |
| break; |
| |
| case LOC_STATIC: |
| gdb_printf (_("static storage at address ")); |
| load_addr = sym->value_address (); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| if (section_is_overlay (section)) |
| { |
| load_addr = overlay_unmapped_address (load_addr, section); |
| gdb_printf (_(",\n -- loaded at ")); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| gdb_printf (_(" in overlay section %s"), |
| section->the_bfd_section->name); |
| } |
| break; |
| |
| case LOC_REGPARM_ADDR: |
| /* Note comment at LOC_REGISTER. */ |
| regno = sym->register_ops ()->register_number (sym, gdbarch); |
| gdb_printf (_("address of an argument in register %s"), |
| gdbarch_register_name (gdbarch, regno)); |
| break; |
| |
| case LOC_ARG: |
| gdb_printf (_("an argument at offset %ld"), val); |
| break; |
| |
| case LOC_LOCAL: |
| gdb_printf (_("a local variable at frame offset %ld"), val); |
| break; |
| |
| case LOC_REF_ARG: |
| gdb_printf (_("a reference argument at offset %ld"), val); |
| break; |
| |
| case LOC_TYPEDEF: |
| gdb_printf (_("a typedef")); |
| break; |
| |
| case LOC_BLOCK: |
| gdb_printf (_("a function at address ")); |
| load_addr = sym->value_block ()->entry_pc (); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| if (section_is_overlay (section)) |
| { |
| load_addr = overlay_unmapped_address (load_addr, section); |
| gdb_printf (_(",\n -- loaded at ")); |
| fputs_styled (paddress (gdbarch, load_addr), address_style.style (), |
| gdb_stdout); |
| gdb_printf (_(" in overlay section %s"), |
| section->the_bfd_section->name); |
| } |
| break; |
| |
| case LOC_UNRESOLVED: |
| { |
| bound_minimal_symbol msym |
| = lookup_minimal_symbol (current_program_space, |
| sym->linkage_name ()); |
| if (msym.minsym == NULL) |
| gdb_printf ("unresolved"); |
| else |
| { |
| section = msym.obj_section (); |
| |
| if (section |
| && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0) |
| { |
| load_addr = CORE_ADDR (msym.minsym->unrelocated_address ()); |
| gdb_printf (_("a thread-local variable at offset %s " |
| "in the thread-local storage for `%s'"), |
| paddress (gdbarch, load_addr), |
| objfile_name (section->objfile)); |
| } |
| else |
| { |
| load_addr = msym.value_address (); |
| gdb_printf (_("static storage at address ")); |
| fputs_styled (paddress (gdbarch, load_addr), |
| address_style.style (), gdb_stdout); |
| if (section_is_overlay (section)) |
| { |
| load_addr = overlay_unmapped_address (load_addr, section); |
| gdb_printf (_(",\n -- loaded at ")); |
| fputs_styled (paddress (gdbarch, load_addr), |
| address_style.style (), |
| gdb_stdout); |
| gdb_printf (_(" in overlay section %s"), |
| section->the_bfd_section->name); |
| } |
| } |
| } |
| } |
| break; |
| |
| case LOC_OPTIMIZED_OUT: |
| gdb_printf (_("optimized out")); |
| break; |
| |
| default: |
| gdb_printf (_("of unknown (botched) type")); |
| break; |
| } |
| gdb_printf (".\n"); |
| } |
| |
| |
| static void |
| x_command (const char *exp, int from_tty) |
| { |
| struct format_data fmt; |
| struct value *val; |
| |
| fmt.format = last_format ? last_format : 'x'; |
| fmt.print_tags = last_print_tags; |
| fmt.size = last_size; |
| fmt.count = 1; |
| fmt.raw = 0; |
| |
| /* If there is no expression and no format, use the most recent |
| count. */ |
| if (exp == nullptr && last_count > 0) |
| fmt.count = last_count; |
| |
| if (exp && *exp == '/') |
| { |
| const char *tmp = exp + 1; |
| |
| fmt = decode_format (&tmp, last_format, last_size); |
| exp = (char *) tmp; |
| } |
| |
| last_count = fmt.count; |
| |
| /* If we have an expression, evaluate it and use it as the address. */ |
| |
| if (exp != 0 && *exp != 0) |
| { |
| expression_up expr = parse_expression (exp); |
| /* Cause expression not to be there any more if this command is |
| repeated with Newline. But don't clobber a user-defined |
| command's definition. */ |
| if (from_tty) |
| set_repeat_arguments (""); |
| val = expr->evaluate (); |
| if (TYPE_IS_REFERENCE (val->type ())) |
| val = coerce_ref (val); |
| /* In rvalue contexts, such as this, functions are coerced into |
| pointers to functions. This makes "x/i main" work. */ |
| if (val->type ()->code () == TYPE_CODE_FUNC |
| && val->lval () == lval_memory) |
| next_address = val->address (); |
| else |
| next_address = value_as_address (val); |
| |
| next_gdbarch = expr->gdbarch; |
| } |
| |
| if (!next_gdbarch) |
| error_no_arg (_("starting display address")); |
| |
| do_examine (fmt, next_gdbarch, next_address); |
| |
| /* If the examine succeeds, we remember its size and format for next |
| time. Set last_size to 'b' for strings. */ |
| if (fmt.format == 's') |
| last_size = 'b'; |
| else |
| last_size = fmt.size; |
| last_format = fmt.format; |
| |
| /* Remember tag-printing setting. */ |
| last_print_tags = fmt.print_tags; |
| |
| /* Set a couple of internal variables if appropriate. */ |
| if (last_examine_value != nullptr) |
| { |
| /* Make last address examined available to the user as $_. Use |
| the correct pointer type. */ |
| struct type *pointer_type |
| = lookup_pointer_type (last_examine_value->type ()); |
| set_internalvar (lookup_internalvar ("_"), |
| value_from_pointer (pointer_type, |
| last_examine_address)); |
| |
| /* Make contents of last address examined available to the user |
| as $__. If the last value has not been fetched from memory |
| then don't fetch it now; instead mark it by voiding the $__ |
| variable. */ |
| if (last_examine_value->lazy ()) |
| clear_internalvar (lookup_internalvar ("__")); |
| else |
| set_internalvar (lookup_internalvar ("__"), last_examine_value.get ()); |
| } |
| } |
| |
| /* Command completion for the 'display' and 'x' commands. */ |
| |
| static void |
| display_and_x_command_completer (struct cmd_list_element *ignore, |
| completion_tracker &tracker, |
| const char *text, const char * /*word*/) |
| { |
| if (skip_over_slash_fmt (tracker, &text)) |
| return; |
| |
| const char *word = advance_to_expression_complete_word_point (tracker, text); |
| expression_completer (ignore, tracker, text, word); |
| } |
| |
| |
| |
| /* Add an expression to the auto-display chain. |
| Specify the expression. */ |
| |
| static void |
| display_command (const char *arg, int from_tty) |
| { |
| struct format_data fmt; |
| struct display *newobj; |
| const char *exp = arg; |
| |
| if (exp == 0) |
| { |
| do_displays (); |
| return; |
| } |
| |
| if (*exp == '/') |
| { |
| exp++; |
| fmt = decode_format (&exp, 0, 0); |
| if (fmt.size && fmt.format == 0) |
| fmt.format = 'x'; |
| if (fmt.format == 'i' || fmt.format == 's') |
| fmt.size = 'b'; |
| } |
| else |
| { |
| fmt.format = 0; |
| fmt.size = 0; |
| fmt.count = 0; |
| fmt.raw = 0; |
| } |
| |
| innermost_block_tracker tracker; |
| expression_up expr = parse_expression (exp, &tracker); |
| |
| newobj = new display (exp, std::move (expr), fmt, |
| current_program_space, tracker.block ()); |
| all_displays.emplace_back (newobj); |
| |
| if (from_tty) |
| do_one_display (newobj); |
| |
| dont_repeat (); |
| } |
| |
| /* Clear out the display_chain. Done when new symtabs are loaded, |
| since this invalidates the types stored in many expressions. */ |
| |
| void |
| clear_displays () |
| { |
| all_displays.clear (); |
| } |
| |
| /* Delete the auto-display DISPLAY. */ |
| |
| static void |
| delete_display (struct display *display) |
| { |
| gdb_assert (display != NULL); |
| |
| auto iter = std::find_if (all_displays.begin (), |
| all_displays.end (), |
| [=] (const std::unique_ptr<struct display> &item) |
| { |
| return item.get () == display; |
| }); |
| gdb_assert (iter != all_displays.end ()); |
| all_displays.erase (iter); |
| } |
| |
| /* Call FUNCTION on each of the displays whose numbers are given in |
| ARGS. DATA is passed unmodified to FUNCTION. */ |
| |
| static void |
| map_display_numbers (const char *args, |
| gdb::function_view<void (struct display *)> function) |
| { |
| int num; |
| |
| if (args == NULL) |
| error_no_arg (_("one or more display numbers")); |
| |
| number_or_range_parser parser (args); |
| |
| while (!parser.finished ()) |
| { |
| const char *p = parser.cur_tok (); |
| |
| num = parser.get_number (); |
| if (num == 0) |
| warning (_("bad display number at or near '%s'"), p); |
| else |
| { |
| auto iter = std::find_if (all_displays.begin (), |
| all_displays.end (), |
| [=] (const std::unique_ptr<display> &item) |
| { |
| return item->number == num; |
| }); |
| if (iter == all_displays.end ()) |
| gdb_printf (_("No display number %d.\n"), num); |
| else |
| function (iter->get ()); |
| } |
| } |
| } |
| |
| /* "undisplay" command. */ |
| |
| static void |
| undisplay_command (const char *args, int from_tty) |
| { |
| if (args == NULL) |
| { |
| if (query (_("Delete all auto-display expressions? "))) |
| clear_displays (); |
| dont_repeat (); |
| return; |
| } |
| |
| map_display_numbers (args, delete_display); |
| dont_repeat (); |
| } |
| |
| /* Display a single auto-display. |
| Do nothing if the display cannot be printed in the current context, |
| or if the display is disabled. */ |
| |
| static void |
| do_one_display (struct display *d) |
| { |
| int within_current_scope; |
| |
| if (!d->enabled_p) |
| return; |
| |
| /* The expression carries the architecture that was used at parse time. |
| This is a problem if the expression depends on architecture features |
| (e.g. register numbers), and the current architecture is now different. |
| For example, a display statement like "display/i $pc" is expected to |
| display the PC register of the current architecture, not the arch at |
| the time the display command was given. Therefore, we re-parse the |
| expression if the current architecture has changed. */ |
| if (d->exp != NULL && d->exp->gdbarch != get_current_arch ()) |
| { |
| d->exp.reset (); |
| d->block = NULL; |
| } |
| |
| if (d->exp == NULL) |
| { |
| |
| try |
| { |
| innermost_block_tracker tracker; |
| d->exp = parse_expression (d->exp_string.c_str (), &tracker); |
| d->block = tracker.block (); |
| } |
| catch (const gdb_exception_error &ex) |
| { |
| /* Can't re-parse the expression. Disable this display item. */ |
| d->enabled_p = false; |
| warning (_("Unable to display \"%s\": %s"), |
| d->exp_string.c_str (), ex.what ()); |
| return; |
| } |
| } |
| |
| if (d->block) |
| { |
| if (d->pspace == current_program_space) |
| within_current_scope = d->block->contains (get_selected_block (0), |
| true); |
| else |
| within_current_scope = 0; |
| } |
| else |
| within_current_scope = 1; |
| if (!within_current_scope) |
| return; |
| |
| scoped_restore save_display_number |
| = make_scoped_restore (¤t_display_number, d->number); |
| |
| annotate_display_begin (); |
| gdb_printf ("%d", d->number); |
| annotate_display_number_end (); |
| gdb_printf (": "); |
| if (d->format.size) |
| { |
| |
| annotate_display_format (); |
| |
| gdb_printf ("x/"); |
| if (d->format.count != 1) |
| gdb_printf ("%d", d->format.count); |
| gdb_printf ("%c", d->format.format); |
| if (d->format.format != 'i' && d->format.format != 's') |
| gdb_printf ("%c", d->format.size); |
| gdb_printf (" "); |
| |
| annotate_display_expression (); |
| |
| gdb_puts (d->exp_string.c_str ()); |
| annotate_display_expression_end (); |
| |
| if (d->format.count != 1 || d->format.format == 'i') |
| gdb_printf ("\n"); |
| else |
| gdb_printf (" "); |
| |
| annotate_display_value (); |
| |
| try |
| { |
| struct value *val; |
| CORE_ADDR addr; |
| |
| val = d->exp->evaluate (); |
| addr = value_as_address (val); |
| if (d->format.format == 'i') |
| addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr); |
| do_examine (d->format, d->exp->gdbarch, addr); |
| } |
| catch (const gdb_exception_error &ex) |
| { |
| gdb_printf (_("%p[<error: %s>%p]\n"), |
| metadata_style.style ().ptr (), ex.what (), |
| nullptr); |
| } |
| } |
| else |
| { |
| struct value_print_options opts; |
| |
| annotate_display_format (); |
| |
| if (d->format.format) |
| gdb_printf ("/%c ", d->format.format); |
| |
| annotate_display_expression (); |
| |
| gdb_puts (d->exp_string.c_str ()); |
| annotate_display_expression_end (); |
| |
| gdb_printf (" = "); |
| |
| annotate_display_expression (); |
| |
| get_formatted_print_options (&opts, d->format.format); |
| opts.raw = d->format.raw; |
| |
| try |
| { |
| struct value *val; |
| |
| val = d->exp->evaluate (); |
| print_formatted (val, d->format.size, &opts, gdb_stdout); |
| } |
| catch (const gdb_exception_error &ex) |
| { |
| fprintf_styled (gdb_stdout, metadata_style.style (), |
| _("<error: %s>"), ex.what ()); |
| } |
| |
| gdb_printf ("\n"); |
| } |
| |
| annotate_display_end (); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| /* Display all of the values on the auto-display chain which can be |
| evaluated in the current scope. */ |
| |
| void |
| do_displays (void) |
| { |
| for (auto &d : all_displays) |
| do_one_display (d.get ()); |
| } |
| |
| /* Delete the auto-display which we were in the process of displaying. |
| This is done when there is an error or a signal. */ |
| |
| void |
| disable_display (int num) |
| { |
| for (auto &d : all_displays) |
| if (d->number == num) |
| { |
| d->enabled_p = false; |
| return; |
| } |
| gdb_printf (_("No display number %d.\n"), num); |
| } |
| |
| void |
| disable_current_display (void) |
| { |
| if (current_display_number >= 0) |
| { |
| disable_display (current_display_number); |
| gdb_printf (gdb_stderr, |
| _("Disabling display %d to " |
| "avoid infinite recursion.\n"), |
| current_display_number); |
| } |
| current_display_number = -1; |
| } |
| |
| static void |
| info_display_command (const char *ignore, int from_tty) |
| { |
| if (all_displays.empty ()) |
| gdb_printf (_("There are no auto-display expressions now.\n")); |
| else |
| gdb_printf (_("Auto-display expressions now in effect:\n\ |
| Num Enb Expression\n")); |
| |
| for (auto &d : all_displays) |
| { |
| gdb_printf ("%d: %c ", d->number, "ny"[(int) d->enabled_p]); |
| if (d->format.size) |
| gdb_printf ("/%d%c%c ", d->format.count, d->format.size, |
| d->format.format); |
| else if (d->format.format) |
| gdb_printf ("/%c ", d->format.format); |
| gdb_puts (d->exp_string.c_str ()); |
| if (d->block && !d->block->contains (get_selected_block (0), true)) |
| gdb_printf (_(" (cannot be evaluated in the current context)")); |
| gdb_printf ("\n"); |
| } |
| } |
| |
| /* Implementation of both the "disable display" and "enable display" |
| commands. ENABLE decides what to do. */ |
| |
| static void |
| enable_disable_display_command (const char *args, int from_tty, bool enable) |
| { |
| if (args == NULL) |
| { |
| for (auto &d : all_displays) |
| d->enabled_p = enable; |
| return; |
| } |
| |
| map_display_numbers (args, |
| [=] (struct display *d) |
| { |
| d->enabled_p = enable; |
| }); |
| } |
| |
| /* The "enable display" command. */ |
| |
| static void |
| enable_display_command (const char *args, int from_tty) |
| { |
| enable_disable_display_command (args, from_tty, true); |
| } |
| |
| /* The "disable display" command. */ |
| |
| static void |
| disable_display_command (const char *args, int from_tty) |
| { |
| enable_disable_display_command (args, from_tty, false); |
| } |
| |
| /* display_chain items point to blocks and expressions. Some expressions in |
| turn may point to symbols. |
| Both symbols and blocks are obstack_alloc'd on objfile_stack, and are |
| obstack_free'd when a shared library is unloaded. |
| Clear pointers that are about to become dangling. |
| Both .exp and .block fields will be restored next time we need to display |
| an item by re-parsing .exp_string field in the new execution context. */ |
| |
| static void |
| clear_dangling_display_expressions (struct objfile *objfile) |
| { |
| program_space *pspace = objfile->pspace (); |
| if (objfile->separate_debug_objfile_backlink) |
| { |
| objfile = objfile->separate_debug_objfile_backlink; |
| gdb_assert (objfile->pspace () == pspace); |
| } |
| |
| for (auto &d : all_displays) |
| { |
| if (d->pspace != pspace) |
| continue; |
| |
| struct objfile *bl_objf = nullptr; |
| if (d->block != nullptr) |
| { |
| bl_objf = d->block->objfile (); |
| if (bl_objf->separate_debug_objfile_backlink != nullptr) |
| bl_objf = bl_objf->separate_debug_objfile_backlink; |
| } |
| |
| if (bl_objf == objfile |
| || (d->exp != nullptr && d->exp->uses_objfile (objfile))) |
| { |
| d->exp.reset (); |
| d->block = NULL; |
| } |
| } |
| } |
| |
| |
| /* Print the value in stack frame FRAME of a variable specified by a |
| struct symbol. NAME is the name to print; if NULL then VAR's print |
| name will be used. STREAM is the ui_file on which to print the |
| value. INDENT specifies the number of indent levels to print |
| before printing the variable name. */ |
| |
| void |
| print_variable_and_value (const char *name, struct symbol *var, |
| const frame_info_ptr &frame, |
| struct ui_file *stream, int indent) |
| { |
| |
| if (!name) |
| name = var->print_name (); |
| |
| gdb_printf (stream, "%*s%ps = ", 2 * indent, "", |
| styled_string (variable_name_style.style (), name)); |
| |
| try |
| { |
| struct value *val; |
| struct value_print_options opts; |
| |
| /* READ_VAR_VALUE needs a block in order to deal with non-local |
| references (i.e. to handle nested functions). In this context, we |
| print variables that are local to this frame, so we can avoid passing |
| a block to it. */ |
| val = read_var_value (var, NULL, frame); |
| get_user_print_options (&opts); |
| opts.deref_ref = true; |
| common_val_print_checked (val, stream, indent, &opts, current_language); |
| } |
| catch (const gdb_exception_error &except) |
| { |
| fprintf_styled (stream, metadata_style.style (), |
| "<error reading variable %s (%s)>", name, |
| except.what ()); |
| } |
| |
| gdb_printf (stream, "\n"); |
| } |
| |
| /* Subroutine of ui_printf to simplify it. |
| Print VALUE to STREAM using FORMAT. |
| VALUE is a C-style string either on the target or |
| in a GDB internal variable. */ |
| |
| static void |
| printf_c_string (struct ui_file *stream, const char *format, |
| struct value *value) |
| { |
| gdb::byte_vector str; |
| |
| if (((value->type ()->code () != TYPE_CODE_PTR && value->lval () == lval_internalvar) |
| || value->type ()->code () == TYPE_CODE_ARRAY) |
| && c_is_string_type_p (value->type ())) |
| { |
| size_t len = value->type ()->length (); |
| |
| /* Copy the internal var value to TEM_STR and append a terminating null |
| character. This protects against corrupted C-style strings that lack |
| the terminating null char. It also allows Ada-style strings (not |
| null terminated) to be printed without problems. */ |
| str.resize (len + 1); |
| |
| memcpy (str.data (), value->contents ().data (), len); |
| str [len] = 0; |
| } |
| else |
| { |
| CORE_ADDR tem = value_as_address (value);; |
| |
| if (tem == 0) |
| { |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, format, "(null)"); |
| DIAGNOSTIC_POP |
| return; |
| } |
| |
| /* This is a %s argument. Build the string in STR which is |
| currently empty. */ |
| gdb_assert (str.size () == 0); |
| size_t len; |
| for (len = 0;; len++) |
| { |
| gdb_byte c; |
| |
| QUIT; |
| |
| read_memory (tem + len, &c, 1); |
| if (!exceeds_max_value_size (len + 1)) |
| str.push_back (c); |
| if (c == 0) |
| break; |
| } |
| |
| if (exceeds_max_value_size (len + 1)) |
| error (_("printed string requires %s bytes, which is more than " |
| "max-value-size"), plongest (len + 1)); |
| |
| /* We will have passed through the above loop at least once, and will |
| only exit the loop when we have pushed a zero byte onto the end of |
| STR. */ |
| gdb_assert (str.size () > 0); |
| gdb_assert (str.back () == 0); |
| } |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, format, (char *) str.data ()); |
| DIAGNOSTIC_POP |
| } |
| |
| /* Subroutine of ui_printf to simplify it. |
| Print VALUE to STREAM using FORMAT. |
| VALUE is a wide C-style string on the target or |
| in a GDB internal variable. */ |
| |
| static void |
| printf_wide_c_string (struct ui_file *stream, const char *format, |
| struct value *value) |
| { |
| const gdb_byte *str; |
| size_t len; |
| struct gdbarch *gdbarch = value->type ()->arch (); |
| struct type *wctype = lookup_typename (current_language, |
| "wchar_t", NULL, 0); |
| int wcwidth = wctype->length (); |
| std::optional<gdb::byte_vector> tem_str; |
| |
| if (value->lval () == lval_internalvar |
| && c_is_string_type_p (value->type ())) |
| { |
| str = value->contents ().data (); |
| len = value->type ()->length (); |
| } |
| else |
| { |
| CORE_ADDR tem = value_as_address (value); |
| |
| if (tem == 0) |
| { |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, format, "(null)"); |
| DIAGNOSTIC_POP |
| return; |
| } |
| |
| /* This is a %s argument. Find the length of the string. */ |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| tem_str.emplace (); |
| |
| for (len = 0;; len += wcwidth) |
| { |
| QUIT; |
| gdb_byte *dst; |
| if (!exceeds_max_value_size (len + wcwidth)) |
| { |
| tem_str->resize (tem_str->size () + wcwidth); |
| dst = tem_str->data () + len; |
| } |
| else |
| { |
| /* We still need to check for the null-character, so we need |
| somewhere to place the data read from the inferior. We |
| can't keep growing TEM_STR, it's gotten too big, so |
| instead just read the new character into the start of |
| TEMS_STR. This will corrupt the previously read contents, |
| but we're not going to print this string anyway, we just |
| want to know how big it would have been so we can tell the |
| user in the error message (see below). |
| |
| And we know there will be space in this buffer so long as |
| WCWIDTH is smaller than our LONGEST type, the |
| max-value-size can't be smaller than a LONGEST. */ |
| dst = tem_str->data (); |
| } |
| read_memory (tem + len, dst, wcwidth); |
| if (extract_unsigned_integer (dst, wcwidth, byte_order) == 0) |
| break; |
| } |
| |
| if (exceeds_max_value_size (len + wcwidth)) |
| error (_("printed string requires %s bytes, which is more than " |
| "max-value-size"), plongest (len + wcwidth)); |
| |
| str = tem_str->data (); |
| } |
| |
| auto_obstack output; |
| |
| convert_between_encodings (target_wide_charset (gdbarch), |
| host_charset (), |
| str, len, wcwidth, |
| &output, translit_char); |
| obstack_grow_str0 (&output, ""); |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, format, obstack_base (&output)); |
| DIAGNOSTIC_POP |
| } |
| |
| /* Subroutine of ui_printf to simplify it. |
| Print VALUE, a floating point value, to STREAM using FORMAT. */ |
| |
| static void |
| printf_floating (struct ui_file *stream, const char *format, |
| struct value *value, enum argclass argclass) |
| { |
| /* Parameter data. */ |
| struct type *param_type = value->type (); |
| struct gdbarch *gdbarch = param_type->arch (); |
| |
| /* Determine target type corresponding to the format string. */ |
| struct type *fmt_type; |
| switch (argclass) |
| { |
| case double_arg: |
| fmt_type = builtin_type (gdbarch)->builtin_double; |
| break; |
| case long_double_arg: |
| fmt_type = builtin_type (gdbarch)->builtin_long_double; |
| break; |
| case dec32float_arg: |
| fmt_type = builtin_type (gdbarch)->builtin_decfloat; |
| break; |
| case dec64float_arg: |
| fmt_type = builtin_type (gdbarch)->builtin_decdouble; |
| break; |
| case dec128float_arg: |
| fmt_type = builtin_type (gdbarch)->builtin_declong; |
| break; |
| default: |
| gdb_assert_not_reached ("unexpected argument class"); |
| } |
| |
| /* To match the traditional GDB behavior, the conversion is |
| done differently depending on the type of the parameter: |
| |
| - if the parameter has floating-point type, it's value |
| is converted to the target type; |
| |
| - otherwise, if the parameter has a type that is of the |
| same size as a built-in floating-point type, the value |
| bytes are interpreted as if they were of that type, and |
| then converted to the target type (this is not done for |
| decimal floating-point argument classes); |
| |
| - otherwise, if the source value has an integer value, |
| it's value is converted to the target type; |
| |
| - otherwise, an error is raised. |
| |
| In either case, the result of the conversion is a byte buffer |
| formatted in the target format for the target type. */ |
| |
| if (fmt_type->code () == TYPE_CODE_FLT) |
| { |
| param_type = float_type_from_length (param_type); |
| if (param_type != value->type ()) |
| value = value_from_contents (param_type, |
| value->contents ().data ()); |
| } |
| |
| value = value_cast (fmt_type, value); |
| |
| /* Convert the value to a string and print it. */ |
| std::string str |
| = target_float_to_string (value->contents ().data (), fmt_type, format); |
| gdb_puts (str.c_str (), stream); |
| } |
| |
| /* Subroutine of ui_printf to simplify it. |
| Print VALUE, a target pointer, to STREAM using FORMAT. */ |
| |
| static void |
| printf_pointer (struct ui_file *stream, const char *format, |
| struct value *value) |
| { |
| /* We avoid the host's %p because pointers are too |
| likely to be the wrong size. The only interesting |
| modifier for %p is a width; extract that, and then |
| handle %p as glibc would: %#x or a literal "(nil)". */ |
| |
| #ifdef PRINTF_HAS_LONG_LONG |
| long long val = value_as_long (value); |
| #else |
| long val = value_as_long (value); |
| #endif |
| |
| /* Build the new output format in FMT. */ |
| std::string fmt; |
| |
| /* Copy up to the leading %. */ |
| const char *p = format; |
| while (*p) |
| { |
| int is_percent = (*p == '%'); |
| |
| fmt.push_back (*p++); |
| if (is_percent) |
| { |
| if (*p == '%') |
| fmt.push_back (*p++); |
| else |
| break; |
| } |
| } |
| |
| if (val != 0) |
| fmt.push_back ('#'); |
| |
| /* Copy any width or flags. Only the "-" flag is valid for pointers |
| -- see the format_pieces constructor. */ |
| while (*p == '-' || (*p >= '0' && *p < '9')) |
| fmt.push_back (*p++); |
| |
| gdb_assert (*p == 'p' && *(p + 1) == '\0'); |
| if (val != 0) |
| { |
| #ifdef PRINTF_HAS_LONG_LONG |
| fmt.push_back ('l'); |
| #endif |
| fmt.push_back ('l'); |
| fmt.push_back ('x'); |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, fmt.c_str (), val); |
| DIAGNOSTIC_POP |
| } |
| else |
| { |
| fmt.push_back ('s'); |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, fmt.c_str (), "(nil)"); |
| DIAGNOSTIC_POP |
| } |
| } |
| |
| /* printf "printf format string" ARG to STREAM. */ |
| |
| static void |
| ui_printf (const char *arg, struct ui_file *stream) |
| { |
| const char *s = arg; |
| std::vector<struct value *> val_args; |
| |
| if (s == 0) |
| error_no_arg (_("format-control string and values to print")); |
| |
| s = skip_spaces (s); |
| |
| /* A format string should follow, enveloped in double quotes. */ |
| if (*s++ != '"') |
| error (_("Bad format string, missing '\"'.")); |
| |
| format_pieces fpieces (&s, false, true); |
| |
| if (*s++ != '"') |
| error (_("Bad format string, non-terminated '\"'.")); |
| |
| s = skip_spaces (s); |
| |
| if (*s != ',' && *s != 0) |
| error (_("Invalid argument syntax")); |
| |
| if (*s == ',') |
| s++; |
| s = skip_spaces (s); |
| |
| { |
| int nargs_wanted; |
| int i; |
| const char *current_substring; |
| |
| nargs_wanted = 0; |
| for (auto &&piece : fpieces) |
| if (piece.argclass != literal_piece) |
| ++nargs_wanted; |
| |
| /* Now, parse all arguments and evaluate them. |
| Store the VALUEs in VAL_ARGS. */ |
| |
| while (*s != '\0') |
| { |
| const char *s1; |
| |
| s1 = s; |
| val_args.push_back (parse_to_comma_and_eval (&s1)); |
| |
| s = s1; |
| if (*s == ',') |
| s++; |
| } |
| |
| if (val_args.size () != nargs_wanted) |
| error (_("Wrong number of arguments for specified format-string")); |
| |
| /* Now actually print them. */ |
| i = 0; |
| for (auto &&piece : fpieces) |
| { |
| current_substring = piece.string; |
| switch (piece.argclass) |
| { |
| case string_arg: |
| printf_c_string (stream, current_substring, val_args[i]); |
| break; |
| case wide_string_arg: |
| printf_wide_c_string (stream, current_substring, val_args[i]); |
| break; |
| case wide_char_arg: |
| { |
| struct gdbarch *gdbarch = val_args[i]->type ()->arch (); |
| struct type *wctype = lookup_typename (current_language, |
| "wchar_t", NULL, 0); |
| struct type *valtype; |
| const gdb_byte *bytes; |
| |
| valtype = val_args[i]->type (); |
| if (valtype->length () != wctype->length () |
| || valtype->code () != TYPE_CODE_INT) |
| error (_("expected wchar_t argument for %%lc")); |
| |
| bytes = val_args[i]->contents ().data (); |
| |
| auto_obstack output; |
| |
| convert_between_encodings (target_wide_charset (gdbarch), |
| host_charset (), |
| bytes, valtype->length (), |
| valtype->length (), |
| &output, translit_char); |
| obstack_grow_str0 (&output, ""); |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, current_substring, |
| obstack_base (&output)); |
| DIAGNOSTIC_POP |
| } |
| break; |
| case long_long_arg: |
| #ifdef PRINTF_HAS_LONG_LONG |
| { |
| long long val = value_as_long (val_args[i]); |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, current_substring, val); |
| DIAGNOSTIC_POP |
| break; |
| } |
| #else |
| error (_("long long not supported in printf")); |
| #endif |
| case int_arg: |
| { |
| int val = value_as_long (val_args[i]); |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, current_substring, val); |
| DIAGNOSTIC_POP |
| break; |
| } |
| case long_arg: |
| { |
| long val = value_as_long (val_args[i]); |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, current_substring, val); |
| DIAGNOSTIC_POP |
| break; |
| } |
| case size_t_arg: |
| { |
| size_t val = value_as_long (val_args[i]); |
| |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, current_substring, val); |
| DIAGNOSTIC_POP |
| break; |
| } |
| /* Handles floating-point values. */ |
| case double_arg: |
| case long_double_arg: |
| case dec32float_arg: |
| case dec64float_arg: |
| case dec128float_arg: |
| printf_floating (stream, current_substring, val_args[i], |
| piece.argclass); |
| break; |
| case ptr_arg: |
| printf_pointer (stream, current_substring, val_args[i]); |
| break; |
| case value_arg: |
| { |
| value_print_options print_opts; |
| get_user_print_options (&print_opts); |
| |
| if (current_substring[2] == '[') |
| { |
| std::string args (¤t_substring[3], |
| strlen (¤t_substring[3]) - 1); |
| |
| const char *args_ptr = args.c_str (); |
| |
| /* Override global settings with explicit options, if |
| any. */ |
| auto group |
| = make_value_print_options_def_group (&print_opts); |
| gdb::option::process_options |
| (&args_ptr, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR, |
| group); |
| |
| if (*args_ptr != '\0') |
| error (_("unexpected content in print options: %s"), |
| args_ptr); |
| } |
| |
| print_formatted (val_args[i], 0, &print_opts, stream); |
| } |
| break; |
| case literal_piece: |
| /* Print a portion of the format string that has no |
| directives. Note that this will not include any |
| ordinary %-specs, but it might include "%%". That is |
| why we use gdb_printf and not gdb_puts here. |
| Also, we pass a dummy argument because some platforms |
| have modified GCC to include -Wformat-security by |
| default, which will warn here if there is no |
| argument. */ |
| DIAGNOSTIC_PUSH |
| DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL |
| gdb_printf (stream, current_substring, 0); |
| DIAGNOSTIC_POP |
| break; |
| default: |
| internal_error (_("failed internal consistency check")); |
| } |
| /* Maybe advance to the next argument. */ |
| if (piece.argclass != literal_piece) |
| ++i; |
| } |
| } |
| } |
| |
| /* Implement the "printf" command. */ |
| |
| static void |
| printf_command (const char *arg, int from_tty) |
| { |
| ui_printf (arg, gdb_stdout); |
| gdb_stdout->reset_style (); |
| gdb_stdout->wrap_here (0); |
| gdb_stdout->flush (); |
| } |
| |
| /* Implement the "eval" command. */ |
| |
| static void |
| eval_command (const char *arg, int from_tty) |
| { |
| string_file stb; |
| |
| ui_printf (arg, &stb); |
| |
| std::string expanded = insert_user_defined_cmd_args (stb.c_str ()); |
| |
| execute_command (expanded.c_str (), from_tty); |
| } |
| |
| /* Convenience function for error checking in memory-tag commands. */ |
| |
| static void |
| show_addr_not_tagged (CORE_ADDR address) |
| { |
| error (_("Address %s not in a region mapped with a memory tagging flag."), |
| paddress (current_inferior ()->arch (), address)); |
| } |
| |
| /* Convenience function for error checking in memory-tag commands. */ |
| |
| static void |
| show_memory_tagging_unsupported (void) |
| { |
| error (_("Memory tagging not supported or disabled by the current" |
| " architecture.")); |
| } |
| |
| /* Implement the "memory-tag" prefix command. */ |
| |
| static void |
| memory_tag_command (const char *arg, int from_tty) |
| { |
| help_list (memory_tag_list, "memory-tag ", all_commands, gdb_stdout); |
| } |
| |
| /* Helper for print-logical-tag and print-allocation-tag. */ |
| |
| static void |
| memory_tag_print_tag_command (const char *args, enum memtag_type tag_type) |
| { |
| if (args == nullptr) |
| error_no_arg (_("address or pointer")); |
| |
| /* Parse args into a value. If the value is a pointer or an address, |
| then fetch the logical or allocation tag. */ |
| value_print_options print_opts; |
| |
| struct value *val = process_print_command_args (args, &print_opts, true); |
| gdbarch *arch = current_inferior ()->arch (); |
| |
| /* If the address is not in a region memory mapped with a memory tagging |
| flag, it is no use trying to access/manipulate its allocation tag. |
| |
| It is OK to manipulate the logical tag though. */ |
| CORE_ADDR addr = value_as_address (val); |
| if (tag_type == memtag_type::allocation |
| && !target_is_address_tagged (arch, addr)) |
| show_addr_not_tagged (addr); |
| |
| value *tag_value = gdbarch_get_memtag (arch, val, tag_type); |
| std::string tag = gdbarch_memtag_to_string (arch, tag_value); |
| |
| if (tag.empty ()) |
| gdb_printf (_("%s tag unavailable.\n"), |
| tag_type |
| == memtag_type::logical? "Logical" : "Allocation"); |
| |
| struct value *v_tag = process_print_command_args (tag.c_str (), |
| &print_opts, |
| true); |
| print_opts.output_format = 'x'; |
| print_value (v_tag, print_opts); |
| } |
| |
| /* Implement the "memory-tag print-logical-tag" command. */ |
| |
| static void |
| memory_tag_print_logical_tag_command (const char *args, int from_tty) |
| { |
| if (!target_supports_memory_tagging ()) |
| show_memory_tagging_unsupported (); |
| |
| memory_tag_print_tag_command (args, memtag_type::logical); |
| } |
| |
| /* Implement the "memory-tag print-allocation-tag" command. */ |
| |
| static void |
| memory_tag_print_allocation_tag_command (const char *args, int from_tty) |
| { |
| if (!target_supports_memory_tagging ()) |
| show_memory_tagging_unsupported (); |
| |
| memory_tag_print_tag_command (args, memtag_type::allocation); |
| } |
| |
| /* Parse ARGS and extract ADDR and TAG. |
| ARGS should have format <expression> <tag bytes>. */ |
| |
| static void |
| parse_with_logical_tag_input (const char *args, struct value **val, |
| gdb::byte_vector &tags, |
| value_print_options *print_opts) |
| { |
| /* Fetch the address. */ |
| std::string address_string = extract_string_maybe_quoted (&args); |
| |
| /* Parse the address into a value. */ |
| *val = process_print_command_args (address_string.c_str (), print_opts, |
| true); |
| |
| /* Fetch the tag bytes. */ |
| std::string tag_string = extract_string_maybe_quoted (&args); |
| |
| /* Validate the input. */ |
| if (address_string.empty () || tag_string.empty ()) |
| error (_("Missing arguments.")); |
| |
| if (tag_string.length () != 2) |
| error (_("Error parsing tags argument. The tag should be 2 digits.")); |
| |
| tags = hex2bin (tag_string.c_str ()); |
| } |
| |
| /* Implement the "memory-tag with-logical-tag" command. */ |
| |
| static void |
| memory_tag_with_logical_tag_command (const char *args, int from_tty) |
| { |
| if (!target_supports_memory_tagging ()) |
| show_memory_tagging_unsupported (); |
| |
| if (args == nullptr) |
| error_no_arg (_("<address> <tag>")); |
| |
| gdb::byte_vector tags; |
| struct value *val; |
| value_print_options print_opts; |
| gdbarch *arch = current_inferior ()->arch (); |
| |
| /* Parse the input. */ |
| parse_with_logical_tag_input (args, &val, tags, &print_opts); |
| |
| /* Setting the logical tag is just a local operation that does not touch |
| any memory from the target. Given an input value, we modify the value |
| to include the appropriate tag. |
| |
| For this reason we need to cast the argument value to a |
| (void *) pointer. This is so we have the right type for the gdbarch |
| hook to manipulate the value and insert the tag. |
| |
| Otherwise, this would fail if, for example, GDB parsed the argument value |
| into an int-sized value and the pointer value has a type of greater |
| length. */ |
| |
| /* Cast to (void *). */ |
| val = value_cast (builtin_type (current_inferior ()->arch ())->builtin_data_ptr, |
| val); |
| |
| /* Length doesn't matter for a logical tag. Pass 0. */ |
| if (!gdbarch_set_memtags (arch, val, 0, tags, memtag_type::logical)) |
| gdb_printf (_("Could not update the logical tag data.\n")); |
| else |
| { |
| /* Always print it in hex format. */ |
| print_opts.output_format = 'x'; |
| print_value (val, print_opts); |
| } |
| } |
| |
| /* Parse ARGS and extract ADDR, LENGTH and TAGS. */ |
| |
| static void |
| parse_set_allocation_tag_input (const char *args, struct value **val, |
| size_t *length, gdb::byte_vector &tags) |
| { |
| /* Fetch the address. */ |
| std::string address_string = extract_string_maybe_quoted (&args); |
| |
| /* Parse the address into a value. */ |
| value_print_options print_opts; |
| *val = process_print_command_args (address_string.c_str (), &print_opts, |
| true); |
| |
| /* Fetch the length. */ |
| std::string length_string = extract_string_maybe_quoted (&args); |
| |
| /* Fetch the tag bytes. */ |
| std::string tags_string = extract_string_maybe_quoted (&args); |
| |
| /* Validate the input. */ |
| if (address_string.empty () || length_string.empty () || tags_string.empty ()) |
| error (_("Missing arguments.")); |
| |
| errno = 0; |
| const char *trailer = nullptr; |
| LONGEST parsed_length = strtoulst (length_string.c_str (), &trailer, 10); |
| |
| if (errno != 0 || (trailer != nullptr && trailer[0] != '\0')) |
| error (_("Error parsing length argument.")); |
| |
| if (parsed_length <= 0) |
| error (_("Invalid zero or negative length.")); |
| |
| *length = parsed_length; |
| |
| if (tags_string.length () % 2) |
| error (_("Error parsing tags argument. Tags should be 2 digits per byte.")); |
| |
| tags = hex2bin (tags_string.c_str ()); |
| } |
| |
| /* Implement the "memory-tag set-allocation-tag" command. |
| ARGS should be in the format <address> <length> <tags>. */ |
| |
| static void |
| memory_tag_set_allocation_tag_command (const char *args, int from_tty) |
| { |
| if (!target_supports_memory_tagging ()) |
| show_memory_tagging_unsupported (); |
| |
| if (args == nullptr) |
| error_no_arg (_("<starting address> <length> <tag bytes>")); |
| |
| gdb::byte_vector tags; |
| size_t length = 0; |
| struct value *val; |
| |
| /* Parse the input. */ |
| parse_set_allocation_tag_input (args, &val, &length, tags); |
| |
| /* If the address is not in a region memory-mapped with a memory tagging |
| flag, it is no use trying to manipulate its allocation tag. */ |
| CORE_ADDR addr = value_as_address (val); |
| if (!target_is_address_tagged (current_inferior ()-> arch(), addr)) |
| show_addr_not_tagged (addr); |
| |
| if (!gdbarch_set_memtags (current_inferior ()->arch (), val, length, tags, |
| memtag_type::allocation)) |
| gdb_printf (_("Could not update the allocation tag(s).\n")); |
| else |
| gdb_printf (_("Allocation tag(s) updated successfully.\n")); |
| } |
| |
| /* Implement the "memory-tag check" command. */ |
| |
| static void |
| memory_tag_check_command (const char *args, int from_tty) |
| { |
| if (!target_supports_memory_tagging ()) |
| show_memory_tagging_unsupported (); |
| |
| if (args == nullptr) |
| error_no_arg (_("address or pointer")); |
| |
| /* Parse the expression into a value. If the value is an address or |
| pointer, then check its logical tag against the allocation tag. */ |
| value_print_options print_opts; |
| |
| struct value *val = process_print_command_args (args, &print_opts, true); |
| gdbarch *arch = current_inferior ()->arch (); |
| |
| CORE_ADDR addr = value_as_address (val); |
| |
| /* If the address is not in a region memory mapped with a memory tagging |
| flag, it is no use trying to access/manipulate its allocation tag. */ |
| if (!target_is_address_tagged (arch, addr)) |
| show_addr_not_tagged (addr); |
| |
| /* Check if the tag is valid. */ |
| if (!gdbarch_memtag_matches_p (arch, val)) |
| { |
| value *tag = gdbarch_get_memtag (arch, val, memtag_type::logical); |
| std::string ltag = gdbarch_memtag_to_string (arch, tag); |
| |
| tag = gdbarch_get_memtag (arch, val, memtag_type::allocation); |
| std::string atag = gdbarch_memtag_to_string (arch, tag); |
| |
| gdb_printf (_("Logical tag (%s) does not match" |
| " the allocation tag (%s) for address %s.\n"), |
| ltag.c_str (), atag.c_str (), |
| paddress (current_inferior ()->arch (), addr)); |
| } |
| else |
| { |
| struct value *tag |
| = gdbarch_get_memtag (current_inferior ()->arch (), val, |
| memtag_type::logical); |
| std::string ltag |
| = gdbarch_memtag_to_string (current_inferior ()->arch (), tag); |
| |
| gdb_printf (_("Memory tags for address %s match (%s).\n"), |
| paddress (current_inferior ()->arch (), addr), ltag.c_str ()); |
| } |
| } |
| |
| void _initialize_printcmd (); |
| void |
| _initialize_printcmd () |
| { |
| struct cmd_list_element *c; |
| |
| current_display_number = -1; |
| |
| gdb::observers::free_objfile.attach (clear_dangling_display_expressions, |
| "printcmd"); |
| |
| add_info ("address", info_address_command, |
| _("Describe where symbol SYM is stored.\n\ |
| Usage: info address SYM")); |
| |
| add_info ("symbol", info_symbol_command, _("\ |
| Describe what symbol is at location ADDR.\n\ |
| Usage: info symbol ADDR\n\ |
| Only for symbols with fixed locations (global or static scope).")); |
| |
| c = add_com ("x", class_vars, x_command, _("\ |
| Examine memory: x/FMT ADDRESS.\n\ |
| ADDRESS is an expression for the memory address to examine.\n\ |
| FMT is a repeat count followed by a format letter and a size letter.\n\ |
| Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ |
| t(binary), f(float), a(address), i(instruction), c(char), s(string)\n\ |
| and z(hex, zero padded on the left).\n\ |
| Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ |
| The specified number of objects of the specified size are printed\n\ |
| according to the format. If a negative number is specified, memory is\n\ |
| examined backward from the address.\n\n\ |
| Defaults for format and size letters are those previously used.\n\ |
| Default count is 1. Default address is following last thing printed\n\ |
| |