1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "gdb_string.h"
27 #include "expression.h"
31 #include "breakpoint.h"
33 #include "gdb-demangle.h"
36 #include "symfile.h" /* for overlay functions */
37 #include "objfiles.h" /* ditto */
38 #include "completer.h" /* for completion functions */
40 #include "gdb_assert.h"
45 #include "exceptions.h"
48 #include "parser-defs.h"
50 #include "arch-utils.h"
51 #include "cli/cli-utils.h"
55 #include "tui/tui.h" /* For tui_active et al. */
64 /* True if the value should be printed raw -- that is, bypassing
65 python-based formatters. */
69 /* Last specified output format. */
71 static char last_format = 0;
73 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
75 static char last_size = 'w';
77 /* Default address to examine next, and associated architecture. */
79 static struct gdbarch *next_gdbarch;
80 static CORE_ADDR next_address;
82 /* Number of delay instructions following current disassembled insn. */
84 static int branch_delay_insns;
86 /* Last address examined. */
88 static CORE_ADDR last_examine_address;
90 /* Contents of last address examined.
91 This is not valid past the end of the `x' command! */
93 static struct value *last_examine_value;
95 /* Largest offset between a symbolic value and an address, that will be
96 printed as `0x1234 <symbol+offset>'. */
98 static unsigned int max_symbolic_offset = UINT_MAX;
100 show_max_symbolic_offset (struct ui_file *file, int from_tty,
101 struct cmd_list_element *c, const char *value)
103 fprintf_filtered (file,
104 _("The largest offset that will be "
105 "printed in <symbol+1234> form is %s.\n"),
109 /* Append the source filename and linenumber of the symbol when
110 printing a symbolic value as `<symbol at filename:linenum>' if set. */
111 static int print_symbol_filename = 0;
113 show_print_symbol_filename (struct ui_file *file, int from_tty,
114 struct cmd_list_element *c, const char *value)
116 fprintf_filtered (file, _("Printing of source filename and "
117 "line number with <symbol> is %s.\n"),
121 /* Number of auto-display expression currently being displayed.
122 So that we can disable it if we get a signal within it.
123 -1 when not doing one. */
125 int current_display_number;
129 /* Chain link to next auto-display item. */
130 struct display *next;
132 /* The expression as the user typed it. */
135 /* Expression to be evaluated and displayed. */
136 struct expression *exp;
138 /* Item number of this auto-display item. */
141 /* Display format specified. */
142 struct format_data format;
144 /* Program space associated with `block'. */
145 struct program_space *pspace;
147 /* Innermost block required by this expression when evaluated. */
148 const struct block *block;
150 /* Status of this display (enabled or disabled). */
154 /* Chain of expressions whose values should be displayed
155 automatically each time the program stops. */
157 static struct display *display_chain;
159 static int display_number;
161 /* Walk the following statement or block through all displays.
162 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
165 #define ALL_DISPLAYS(B) \
166 for (B = display_chain; B; B = B->next)
168 #define ALL_DISPLAYS_SAFE(B,TMP) \
169 for (B = display_chain; \
170 B ? (TMP = B->next, 1): 0; \
173 /* Prototypes for exported functions. */
175 void output_command (char *, int);
177 void _initialize_printcmd (void);
179 /* Prototypes for local functions. */
181 static void do_one_display (struct display *);
184 /* Decode a format specification. *STRING_PTR should point to it.
185 OFORMAT and OSIZE are used as defaults for the format and size
186 if none are given in the format specification.
187 If OSIZE is zero, then the size field of the returned value
188 should be set only if a size is explicitly specified by the
190 The structure returned describes all the data
191 found in the specification. In addition, *STRING_PTR is advanced
192 past the specification and past all whitespace following it. */
194 static struct format_data
195 decode_format (char **string_ptr, int oformat, int osize)
197 struct format_data val;
198 char *p = *string_ptr;
205 if (*p >= '0' && *p <= '9')
206 val.count = atoi (p);
207 while (*p >= '0' && *p <= '9')
210 /* Now process size or format letters that follow. */
214 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
221 else if (*p >= 'a' && *p <= 'z')
227 while (*p == ' ' || *p == '\t')
231 /* Set defaults for format and size if not specified. */
232 if (val.format == '?')
236 /* Neither has been specified. */
237 val.format = oformat;
241 /* If a size is specified, any format makes a reasonable
242 default except 'i'. */
243 val.format = oformat == 'i' ? 'x' : oformat;
245 else if (val.size == '?')
249 /* Pick the appropriate size for an address. This is deferred
250 until do_examine when we know the actual architecture to use.
251 A special size value of 'a' is used to indicate this case. */
252 val.size = osize ? 'a' : osize;
255 /* Floating point has to be word or giantword. */
256 if (osize == 'w' || osize == 'g')
259 /* Default it to giantword if the last used size is not
261 val.size = osize ? 'g' : osize;
264 /* Characters default to one byte. */
265 val.size = osize ? 'b' : osize;
268 /* Display strings with byte size chars unless explicitly
274 /* The default is the size most recently specified. */
281 /* Print value VAL on stream according to OPTIONS.
282 Do not end with a newline.
283 SIZE is the letter for the size of datum being printed.
284 This is used to pad hex numbers so they line up. SIZE is 0
285 for print / output and set for examine. */
288 print_formatted (struct value *val, int size,
289 const struct value_print_options *options,
290 struct ui_file *stream)
292 struct type *type = check_typedef (value_type (val));
293 int len = TYPE_LENGTH (type);
295 if (VALUE_LVAL (val) == lval_memory)
296 next_address = value_address (val) + len;
300 switch (options->format)
304 struct type *elttype = value_type (val);
306 next_address = (value_address (val)
307 + val_print_string (elttype, NULL,
308 value_address (val), -1,
309 stream, options) * len);
314 /* We often wrap here if there are long symbolic names. */
316 next_address = (value_address (val)
317 + gdb_print_insn (get_type_arch (type),
318 value_address (val), stream,
319 &branch_delay_insns));
324 if (options->format == 0 || options->format == 's'
325 || TYPE_CODE (type) == TYPE_CODE_REF
326 || TYPE_CODE (type) == TYPE_CODE_ARRAY
327 || TYPE_CODE (type) == TYPE_CODE_STRING
328 || TYPE_CODE (type) == TYPE_CODE_STRUCT
329 || TYPE_CODE (type) == TYPE_CODE_UNION
330 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
331 value_print (val, stream, options);
333 /* User specified format, so don't look to the type to tell us
335 val_print_scalar_formatted (type,
336 value_contents_for_printing (val),
337 value_embedded_offset (val),
339 options, size, stream);
342 /* Return builtin floating point type of same length as TYPE.
343 If no such type is found, return TYPE itself. */
345 float_type_from_length (struct type *type)
347 struct gdbarch *gdbarch = get_type_arch (type);
348 const struct builtin_type *builtin = builtin_type (gdbarch);
350 if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_float))
351 type = builtin->builtin_float;
352 else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_double))
353 type = builtin->builtin_double;
354 else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_long_double))
355 type = builtin->builtin_long_double;
360 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
361 according to OPTIONS and SIZE on STREAM. Formats s and i are not
362 supported at this level. */
365 print_scalar_formatted (const void *valaddr, struct type *type,
366 const struct value_print_options *options,
367 int size, struct ui_file *stream)
369 struct gdbarch *gdbarch = get_type_arch (type);
370 LONGEST val_long = 0;
371 unsigned int len = TYPE_LENGTH (type);
372 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
374 /* String printing should go through val_print_scalar_formatted. */
375 gdb_assert (options->format != 's');
377 if (len > sizeof(LONGEST) &&
378 (TYPE_CODE (type) == TYPE_CODE_INT
379 || TYPE_CODE (type) == TYPE_CODE_ENUM))
381 switch (options->format)
384 print_octal_chars (stream, valaddr, len, byte_order);
388 print_decimal_chars (stream, valaddr, len, byte_order);
391 print_binary_chars (stream, valaddr, len, byte_order);
394 print_hex_chars (stream, valaddr, len, byte_order);
397 print_char_chars (stream, type, valaddr, len, byte_order);
404 if (options->format != 'f')
405 val_long = unpack_long (type, valaddr);
407 /* If the value is a pointer, and pointers and addresses are not the
408 same, then at this point, the value's length (in target bytes) is
409 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
410 if (TYPE_CODE (type) == TYPE_CODE_PTR)
411 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT;
413 /* If we are printing it as unsigned, truncate it in case it is actually
414 a negative signed value (e.g. "print/u (short)-1" should print 65535
415 (if shorts are 16 bits) instead of 4294967295). */
416 if (options->format != 'd' || TYPE_UNSIGNED (type))
418 if (len < sizeof (LONGEST))
419 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
422 switch (options->format)
427 /* No size specified, like in print. Print varying # of digits. */
428 print_longest (stream, 'x', 1, val_long);
437 print_longest (stream, size, 1, val_long);
440 error (_("Undefined output size \"%c\"."), size);
445 print_longest (stream, 'd', 1, val_long);
449 print_longest (stream, 'u', 0, val_long);
454 print_longest (stream, 'o', 1, val_long);
456 fprintf_filtered (stream, "0");
461 CORE_ADDR addr = unpack_pointer (type, valaddr);
463 print_address (gdbarch, addr, stream);
469 struct value_print_options opts = *options;
472 if (TYPE_UNSIGNED (type))
473 type = builtin_type (gdbarch)->builtin_true_unsigned_char;
475 type = builtin_type (gdbarch)->builtin_true_char;
477 value_print (value_from_longest (type, val_long), stream, &opts);
482 type = float_type_from_length (type);
483 print_floating (valaddr, type, stream);
487 internal_error (__FILE__, __LINE__,
488 _("failed internal consistency check"));
491 /* Binary; 't' stands for "two". */
493 char bits[8 * (sizeof val_long) + 1];
494 char buf[8 * (sizeof val_long) + 32];
499 width = 8 * (sizeof val_long);
516 error (_("Undefined output size \"%c\"."), size);
522 bits[width] = (val_long & 1) ? '1' : '0';
527 while (*cp && *cp == '0')
532 strncpy (buf, cp, sizeof (bits));
533 fputs_filtered (buf, stream);
538 error (_("Undefined output format \"%c\"."), options->format);
542 /* Specify default address for `x' command.
543 The `info lines' command uses this. */
546 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
548 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
550 next_gdbarch = gdbarch;
553 /* Make address available to the user as $_. */
554 set_internalvar (lookup_internalvar ("_"),
555 value_from_pointer (ptr_type, addr));
558 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
559 after LEADIN. Print nothing if no symbolic name is found nearby.
560 Optionally also print source file and line number, if available.
561 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
562 or to interpret it as a possible C++ name and convert it back to source
563 form. However note that DO_DEMANGLE can be overridden by the specific
564 settings of the demangle and asm_demangle variables. Returns
565 non-zero if anything was printed; zero otherwise. */
568 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
569 struct ui_file *stream,
570 int do_demangle, char *leadin)
573 char *filename = NULL;
578 /* Throw away both name and filename. */
579 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
580 make_cleanup (free_current_contents, &filename);
582 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset,
583 &filename, &line, &unmapped))
585 do_cleanups (cleanup_chain);
589 fputs_filtered (leadin, stream);
591 fputs_filtered ("<*", stream);
593 fputs_filtered ("<", stream);
594 fputs_filtered (name, stream);
596 fprintf_filtered (stream, "+%u", (unsigned int) offset);
598 /* Append source filename and line number if desired. Give specific
599 line # of this addr, if we have it; else line # of the nearest symbol. */
600 if (print_symbol_filename && filename != NULL)
603 fprintf_filtered (stream, " at %s:%d", filename, line);
605 fprintf_filtered (stream, " in %s", filename);
608 fputs_filtered ("*>", stream);
610 fputs_filtered (">", stream);
612 do_cleanups (cleanup_chain);
616 /* Given an address ADDR return all the elements needed to print the
617 address in a symbolic form. NAME can be mangled or not depending
618 on DO_DEMANGLE (and also on the asm_demangle global variable,
619 manipulated via ''set print asm-demangle''). Return 0 in case of
620 success, when all the info in the OUT paramters is valid. Return 1
623 build_address_symbolic (struct gdbarch *gdbarch,
624 CORE_ADDR addr, /* IN */
625 int do_demangle, /* IN */
626 char **name, /* OUT */
627 int *offset, /* OUT */
628 char **filename, /* OUT */
630 int *unmapped) /* OUT */
632 struct minimal_symbol *msymbol;
633 struct symbol *symbol;
634 CORE_ADDR name_location = 0;
635 struct obj_section *section = NULL;
636 const char *name_temp = "";
638 /* Let's say it is mapped (not unmapped). */
641 /* Determine if the address is in an overlay, and whether it is
643 if (overlay_debugging)
645 section = find_pc_overlay (addr);
646 if (pc_in_unmapped_range (addr, section))
649 addr = overlay_mapped_address (addr, section);
653 /* First try to find the address in the symbol table, then
654 in the minsyms. Take the closest one. */
656 /* This is defective in the sense that it only finds text symbols. So
657 really this is kind of pointless--we should make sure that the
658 minimal symbols have everything we need (by changing that we could
659 save some memory, but for many debug format--ELF/DWARF or
660 anything/stabs--it would be inconvenient to eliminate those minimal
662 msymbol = lookup_minimal_symbol_by_pc_section (addr, section);
663 symbol = find_pc_sect_function (addr, section);
667 /* If this is a function (i.e. a code address), strip out any
668 non-address bits. For instance, display a pointer to the
669 first instruction of a Thumb function as <function>; the
670 second instruction will be <function+2>, even though the
671 pointer is <function+3>. This matches the ISA behavior. */
672 addr = gdbarch_addr_bits_remove (gdbarch, addr);
674 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
675 if (do_demangle || asm_demangle)
676 name_temp = SYMBOL_PRINT_NAME (symbol);
678 name_temp = SYMBOL_LINKAGE_NAME (symbol);
682 && MSYMBOL_HAS_SIZE (msymbol)
683 && MSYMBOL_SIZE (msymbol) == 0
684 && MSYMBOL_TYPE (msymbol) != mst_text
685 && MSYMBOL_TYPE (msymbol) != mst_text_gnu_ifunc
686 && MSYMBOL_TYPE (msymbol) != mst_file_text)
691 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
693 /* The msymbol is closer to the address than the symbol;
694 use the msymbol instead. */
696 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
697 if (do_demangle || asm_demangle)
698 name_temp = SYMBOL_PRINT_NAME (msymbol);
700 name_temp = SYMBOL_LINKAGE_NAME (msymbol);
703 if (symbol == NULL && msymbol == NULL)
706 /* If the nearest symbol is too far away, don't print anything symbolic. */
708 /* For when CORE_ADDR is larger than unsigned int, we do math in
709 CORE_ADDR. But when we detect unsigned wraparound in the
710 CORE_ADDR math, we ignore this test and print the offset,
711 because addr+max_symbolic_offset has wrapped through the end
712 of the address space back to the beginning, giving bogus comparison. */
713 if (addr > name_location + max_symbolic_offset
714 && name_location + max_symbolic_offset > name_location)
717 *offset = addr - name_location;
719 *name = xstrdup (name_temp);
721 if (print_symbol_filename)
723 struct symtab_and_line sal;
725 sal = find_pc_sect_line (addr, section, 0);
729 *filename = xstrdup (sal.symtab->filename);
737 /* Print address ADDR symbolically on STREAM.
738 First print it as a number. Then perhaps print
739 <SYMBOL + OFFSET> after the number. */
742 print_address (struct gdbarch *gdbarch,
743 CORE_ADDR addr, struct ui_file *stream)
745 fputs_filtered (paddress (gdbarch, addr), stream);
746 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " ");
749 /* Return a prefix for instruction address:
750 "=> " for current instruction, else " ". */
753 pc_prefix (CORE_ADDR addr)
755 if (has_stack_frames ())
757 struct frame_info *frame;
760 frame = get_selected_frame (NULL);
761 if (get_frame_pc_if_available (frame, &pc) && pc == addr)
767 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
768 controls whether to print the symbolic name "raw" or demangled.
769 Return non-zero if anything was printed; zero otherwise. */
772 print_address_demangle (const struct value_print_options *opts,
773 struct gdbarch *gdbarch, CORE_ADDR addr,
774 struct ui_file *stream, int do_demangle)
776 if (opts->addressprint)
778 fputs_filtered (paddress (gdbarch, addr), stream);
779 print_address_symbolic (gdbarch, addr, stream, do_demangle, " ");
783 return print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
789 /* Examine data at address ADDR in format FMT.
790 Fetch it from memory and print on gdb_stdout. */
793 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr)
798 struct type *val_type = NULL;
801 struct value_print_options opts;
806 next_gdbarch = gdbarch;
809 /* Instruction format implies fetch single bytes
810 regardless of the specified size.
811 The case of strings is handled in decode_format, only explicit
812 size operator are not changed to 'b'. */
818 /* Pick the appropriate size for an address. */
819 if (gdbarch_ptr_bit (next_gdbarch) == 64)
821 else if (gdbarch_ptr_bit (next_gdbarch) == 32)
823 else if (gdbarch_ptr_bit (next_gdbarch) == 16)
826 /* Bad value for gdbarch_ptr_bit. */
827 internal_error (__FILE__, __LINE__,
828 _("failed internal consistency check"));
832 val_type = builtin_type (next_gdbarch)->builtin_int8;
833 else if (size == 'h')
834 val_type = builtin_type (next_gdbarch)->builtin_int16;
835 else if (size == 'w')
836 val_type = builtin_type (next_gdbarch)->builtin_int32;
837 else if (size == 'g')
838 val_type = builtin_type (next_gdbarch)->builtin_int64;
842 struct type *char_type = NULL;
844 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
845 if type is not found. */
847 char_type = builtin_type (next_gdbarch)->builtin_char16;
848 else if (size == 'w')
849 char_type = builtin_type (next_gdbarch)->builtin_char32;
851 val_type = char_type;
854 if (size != '\0' && size != 'b')
855 warning (_("Unable to display strings with "
856 "size '%c', using 'b' instead."), size);
858 val_type = builtin_type (next_gdbarch)->builtin_int8;
867 if (format == 's' || format == 'i')
870 get_formatted_print_options (&opts, format);
872 /* Print as many objects as specified in COUNT, at most maxelts per line,
873 with the address of the next one at the start of each line. */
879 fputs_filtered (pc_prefix (next_address), gdb_stdout);
880 print_address (next_gdbarch, next_address, gdb_stdout);
881 printf_filtered (":");
886 printf_filtered ("\t");
887 /* Note that print_formatted sets next_address for the next
889 last_examine_address = next_address;
891 if (last_examine_value)
892 value_free (last_examine_value);
894 /* The value to be displayed is not fetched greedily.
895 Instead, to avoid the possibility of a fetched value not
896 being used, its retrieval is delayed until the print code
897 uses it. When examining an instruction stream, the
898 disassembler will perform its own memory fetch using just
899 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
900 the disassembler be modified so that LAST_EXAMINE_VALUE
901 is left with the byte sequence from the last complete
902 instruction fetched from memory? */
903 last_examine_value = value_at_lazy (val_type, next_address);
905 if (last_examine_value)
906 release_value (last_examine_value);
908 print_formatted (last_examine_value, size, &opts, gdb_stdout);
910 /* Display any branch delay slots following the final insn. */
911 if (format == 'i' && count == 1)
912 count += branch_delay_insns;
914 printf_filtered ("\n");
915 gdb_flush (gdb_stdout);
920 validate_format (struct format_data fmt, char *cmdname)
923 error (_("Size letters are meaningless in \"%s\" command."), cmdname);
925 error (_("Item count other than 1 is meaningless in \"%s\" command."),
927 if (fmt.format == 'i')
928 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
929 fmt.format, cmdname);
932 /* Evaluate string EXP as an expression in the current language and
933 print the resulting value. EXP may contain a format specifier as the
934 first argument ("/x myvar" for example, to print myvar in hex). */
937 print_command_1 (char *exp, int inspect, int voidprint)
939 struct expression *expr;
940 struct cleanup *old_chain = 0;
943 struct format_data fmt;
946 if (exp && *exp == '/')
949 fmt = decode_format (&exp, last_format, 0);
950 validate_format (fmt, "print");
951 last_format = format = fmt.format;
963 expr = parse_expression (exp);
964 old_chain = make_cleanup (free_current_contents, &expr);
966 val = evaluate_expression (expr);
969 val = access_value_history (0);
971 if (voidprint || (val && value_type (val) &&
972 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
974 struct value_print_options opts;
975 int histindex = record_latest_value (val);
978 annotate_value_history_begin (histindex, value_type (val));
980 annotate_value_begin (value_type (val));
983 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
985 else if (histindex >= 0)
986 printf_filtered ("$%d = ", histindex);
989 annotate_value_history_value ();
991 get_formatted_print_options (&opts, format);
992 opts.inspect_it = inspect;
995 print_formatted (val, fmt.size, &opts, gdb_stdout);
996 printf_filtered ("\n");
999 annotate_value_history_end ();
1001 annotate_value_end ();
1004 printf_unfiltered ("\") )\030");
1008 do_cleanups (old_chain);
1012 print_command (char *exp, int from_tty)
1014 print_command_1 (exp, 0, 1);
1017 /* Same as print, except in epoch, it gets its own window. */
1019 inspect_command (char *exp, int from_tty)
1021 extern int epoch_interface;
1023 print_command_1 (exp, epoch_interface, 1);
1026 /* Same as print, except it doesn't print void results. */
1028 call_command (char *exp, int from_tty)
1030 print_command_1 (exp, 0, 0);
1034 output_command (char *exp, int from_tty)
1036 struct expression *expr;
1037 struct cleanup *old_chain;
1040 struct format_data fmt;
1041 struct value_print_options opts;
1046 if (exp && *exp == '/')
1049 fmt = decode_format (&exp, 0, 0);
1050 validate_format (fmt, "output");
1051 format = fmt.format;
1054 expr = parse_expression (exp);
1055 old_chain = make_cleanup (free_current_contents, &expr);
1057 val = evaluate_expression (expr);
1059 annotate_value_begin (value_type (val));
1061 get_formatted_print_options (&opts, format);
1063 print_formatted (val, fmt.size, &opts, gdb_stdout);
1065 annotate_value_end ();
1068 gdb_flush (gdb_stdout);
1070 do_cleanups (old_chain);
1074 set_command (char *exp, int from_tty)
1076 struct expression *expr = parse_expression (exp);
1077 struct cleanup *old_chain =
1078 make_cleanup (free_current_contents, &expr);
1080 if (expr->nelts >= 1)
1081 switch (expr->elts[0].opcode)
1083 case UNOP_PREINCREMENT:
1084 case UNOP_POSTINCREMENT:
1085 case UNOP_PREDECREMENT:
1086 case UNOP_POSTDECREMENT:
1088 case BINOP_ASSIGN_MODIFY:
1093 (_("Expression is not an assignment (and might have no effect)"));
1096 evaluate_expression (expr);
1097 do_cleanups (old_chain);
1101 sym_info (char *arg, int from_tty)
1103 struct minimal_symbol *msymbol;
1104 struct objfile *objfile;
1105 struct obj_section *osect;
1106 CORE_ADDR addr, sect_addr;
1108 unsigned int offset;
1111 error_no_arg (_("address"));
1113 addr = parse_and_eval_address (arg);
1114 ALL_OBJSECTIONS (objfile, osect)
1116 /* Only process each object file once, even if there's a separate
1118 if (objfile->separate_debug_objfile_backlink)
1121 sect_addr = overlay_mapped_address (addr, osect);
1123 if (obj_section_addr (osect) <= sect_addr
1124 && sect_addr < obj_section_endaddr (osect)
1125 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect)))
1127 const char *obj_name, *mapped, *sec_name, *msym_name;
1129 struct cleanup *old_chain;
1132 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1133 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
1134 sec_name = osect->the_bfd_section->name;
1135 msym_name = SYMBOL_PRINT_NAME (msymbol);
1137 /* Don't print the offset if it is zero.
1138 We assume there's no need to handle i18n of "sym + offset". */
1140 loc_string = xstrprintf ("%s + %u", msym_name, offset);
1142 loc_string = xstrprintf ("%s", msym_name);
1144 /* Use a cleanup to free loc_string in case the user quits
1145 a pagination request inside printf_filtered. */
1146 old_chain = make_cleanup (xfree, loc_string);
1148 gdb_assert (osect->objfile && osect->objfile->name);
1149 obj_name = osect->objfile->name;
1151 if (MULTI_OBJFILE_P ())
1152 if (pc_in_unmapped_range (addr, osect))
1153 if (section_is_overlay (osect))
1154 printf_filtered (_("%s in load address range of "
1155 "%s overlay section %s of %s\n"),
1156 loc_string, mapped, sec_name, obj_name);
1158 printf_filtered (_("%s in load address range of "
1159 "section %s of %s\n"),
1160 loc_string, sec_name, obj_name);
1162 if (section_is_overlay (osect))
1163 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1164 loc_string, mapped, sec_name, obj_name);
1166 printf_filtered (_("%s in section %s of %s\n"),
1167 loc_string, sec_name, obj_name);
1169 if (pc_in_unmapped_range (addr, osect))
1170 if (section_is_overlay (osect))
1171 printf_filtered (_("%s in load address range of %s overlay "
1173 loc_string, mapped, sec_name);
1175 printf_filtered (_("%s in load address range of section %s\n"),
1176 loc_string, sec_name);
1178 if (section_is_overlay (osect))
1179 printf_filtered (_("%s in %s overlay section %s\n"),
1180 loc_string, mapped, sec_name);
1182 printf_filtered (_("%s in section %s\n"),
1183 loc_string, sec_name);
1185 do_cleanups (old_chain);
1189 printf_filtered (_("No symbol matches %s.\n"), arg);
1193 address_info (char *exp, int from_tty)
1195 struct gdbarch *gdbarch;
1198 struct minimal_symbol *msymbol;
1200 struct obj_section *section;
1201 CORE_ADDR load_addr, context_pc = 0;
1202 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
1203 if exp is a field of `this'. */
1206 error (_("Argument required."));
1208 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
1209 &is_a_field_of_this);
1212 if (is_a_field_of_this)
1214 printf_filtered ("Symbol \"");
1215 fprintf_symbol_filtered (gdb_stdout, exp,
1216 current_language->la_language, DMGL_ANSI);
1217 printf_filtered ("\" is a field of the local class variable ");
1218 if (current_language->la_language == language_objc)
1219 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1221 printf_filtered ("`this'\n");
1225 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1227 if (msymbol != NULL)
1229 gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
1230 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1232 printf_filtered ("Symbol \"");
1233 fprintf_symbol_filtered (gdb_stdout, exp,
1234 current_language->la_language, DMGL_ANSI);
1235 printf_filtered ("\" is at ");
1236 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1237 printf_filtered (" in a file compiled without debugging");
1238 section = SYMBOL_OBJ_SECTION (msymbol);
1239 if (section_is_overlay (section))
1241 load_addr = overlay_unmapped_address (load_addr, section);
1242 printf_filtered (",\n -- loaded at ");
1243 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1244 printf_filtered (" in overlay section %s",
1245 section->the_bfd_section->name);
1247 printf_filtered (".\n");
1250 error (_("No symbol \"%s\" in current context."), exp);
1254 printf_filtered ("Symbol \"");
1255 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1256 current_language->la_language, DMGL_ANSI);
1257 printf_filtered ("\" is ");
1258 val = SYMBOL_VALUE (sym);
1259 section = SYMBOL_OBJ_SECTION (sym);
1260 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1262 switch (SYMBOL_CLASS (sym))
1265 case LOC_CONST_BYTES:
1266 printf_filtered ("constant");
1270 printf_filtered ("a label at address ");
1271 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1272 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1273 if (section_is_overlay (section))
1275 load_addr = overlay_unmapped_address (load_addr, section);
1276 printf_filtered (",\n -- loaded at ");
1277 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1278 printf_filtered (" in overlay section %s",
1279 section->the_bfd_section->name);
1284 /* FIXME: cagney/2004-01-26: It should be possible to
1285 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1286 Unfortunately DWARF 2 stores the frame-base (instead of the
1287 function) location in a function's symbol. Oops! For the
1288 moment enable this when/where applicable. */
1289 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
1294 /* GDBARCH is the architecture associated with the objfile the symbol
1295 is defined in; the target architecture may be different, and may
1296 provide additional registers. However, we do not know the target
1297 architecture at this point. We assume the objfile architecture
1298 will contain all the standard registers that occur in debug info
1300 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1302 if (SYMBOL_IS_ARGUMENT (sym))
1303 printf_filtered (_("an argument in register %s"),
1304 gdbarch_register_name (gdbarch, regno));
1306 printf_filtered (_("a variable in register %s"),
1307 gdbarch_register_name (gdbarch, regno));
1311 printf_filtered (_("static storage at address "));
1312 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1313 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1314 if (section_is_overlay (section))
1316 load_addr = overlay_unmapped_address (load_addr, section);
1317 printf_filtered (_(",\n -- loaded at "));
1318 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1319 printf_filtered (_(" in overlay section %s"),
1320 section->the_bfd_section->name);
1324 case LOC_REGPARM_ADDR:
1325 /* Note comment at LOC_REGISTER. */
1326 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1327 printf_filtered (_("address of an argument in register %s"),
1328 gdbarch_register_name (gdbarch, regno));
1332 printf_filtered (_("an argument at offset %ld"), val);
1336 printf_filtered (_("a local variable at frame offset %ld"), val);
1340 printf_filtered (_("a reference argument at offset %ld"), val);
1344 printf_filtered (_("a typedef"));
1348 printf_filtered (_("a function at address "));
1349 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1350 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1351 if (section_is_overlay (section))
1353 load_addr = overlay_unmapped_address (load_addr, section);
1354 printf_filtered (_(",\n -- loaded at "));
1355 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1356 printf_filtered (_(" in overlay section %s"),
1357 section->the_bfd_section->name);
1361 case LOC_UNRESOLVED:
1363 struct minimal_symbol *msym;
1365 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
1367 printf_filtered ("unresolved");
1370 section = SYMBOL_OBJ_SECTION (msym);
1371 load_addr = SYMBOL_VALUE_ADDRESS (msym);
1374 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1375 printf_filtered (_("a thread-local variable at offset %s "
1376 "in the thread-local storage for `%s'"),
1377 paddress (gdbarch, load_addr),
1378 section->objfile->name);
1381 printf_filtered (_("static storage at address "));
1382 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1383 if (section_is_overlay (section))
1385 load_addr = overlay_unmapped_address (load_addr, section);
1386 printf_filtered (_(",\n -- loaded at "));
1387 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1388 printf_filtered (_(" in overlay section %s"),
1389 section->the_bfd_section->name);
1396 case LOC_OPTIMIZED_OUT:
1397 printf_filtered (_("optimized out"));
1401 printf_filtered (_("of unknown (botched) type"));
1404 printf_filtered (".\n");
1409 x_command (char *exp, int from_tty)
1411 struct expression *expr;
1412 struct format_data fmt;
1413 struct cleanup *old_chain;
1416 fmt.format = last_format ? last_format : 'x';
1417 fmt.size = last_size;
1421 if (exp && *exp == '/')
1424 fmt = decode_format (&exp, last_format, last_size);
1427 /* If we have an expression, evaluate it and use it as the address. */
1429 if (exp != 0 && *exp != 0)
1431 expr = parse_expression (exp);
1432 /* Cause expression not to be there any more if this command is
1433 repeated with Newline. But don't clobber a user-defined
1434 command's definition. */
1437 old_chain = make_cleanup (free_current_contents, &expr);
1438 val = evaluate_expression (expr);
1439 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1440 val = coerce_ref (val);
1441 /* In rvalue contexts, such as this, functions are coerced into
1442 pointers to functions. This makes "x/i main" work. */
1443 if (/* last_format == 'i' && */
1444 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1445 && VALUE_LVAL (val) == lval_memory)
1446 next_address = value_address (val);
1448 next_address = value_as_address (val);
1450 next_gdbarch = expr->gdbarch;
1451 do_cleanups (old_chain);
1455 error_no_arg (_("starting display address"));
1457 do_examine (fmt, next_gdbarch, next_address);
1459 /* If the examine succeeds, we remember its size and format for next
1460 time. Set last_size to 'b' for strings. */
1461 if (fmt.format == 's')
1464 last_size = fmt.size;
1465 last_format = fmt.format;
1467 /* Set a couple of internal variables if appropriate. */
1468 if (last_examine_value)
1470 /* Make last address examined available to the user as $_. Use
1471 the correct pointer type. */
1472 struct type *pointer_type
1473 = lookup_pointer_type (value_type (last_examine_value));
1474 set_internalvar (lookup_internalvar ("_"),
1475 value_from_pointer (pointer_type,
1476 last_examine_address));
1478 /* Make contents of last address examined available to the user
1479 as $__. If the last value has not been fetched from memory
1480 then don't fetch it now; instead mark it by voiding the $__
1482 if (value_lazy (last_examine_value))
1483 clear_internalvar (lookup_internalvar ("__"));
1485 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1490 /* Add an expression to the auto-display chain.
1491 Specify the expression. */
1494 display_command (char *exp, int from_tty)
1496 struct format_data fmt;
1497 struct expression *expr;
1498 struct display *new;
1502 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1504 if (tui_active && exp != NULL && *exp == '$')
1505 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1519 fmt = decode_format (&exp, 0, 0);
1520 if (fmt.size && fmt.format == 0)
1522 if (fmt.format == 'i' || fmt.format == 's')
1533 innermost_block = NULL;
1534 expr = parse_expression (exp);
1536 new = (struct display *) xmalloc (sizeof (struct display));
1538 new->exp_string = xstrdup (exp);
1540 new->block = innermost_block;
1541 new->pspace = current_program_space;
1542 new->next = display_chain;
1543 new->number = ++display_number;
1546 display_chain = new;
1548 if (from_tty && target_has_execution)
1549 do_one_display (new);
1556 free_display (struct display *d)
1558 xfree (d->exp_string);
1563 /* Clear out the display_chain. Done when new symtabs are loaded,
1564 since this invalidates the types stored in many expressions. */
1567 clear_displays (void)
1571 while ((d = display_chain) != NULL)
1573 display_chain = d->next;
1578 /* Delete the auto-display DISPLAY. */
1581 delete_display (struct display *display)
1585 gdb_assert (display != NULL);
1587 if (display_chain == display)
1588 display_chain = display->next;
1591 if (d->next == display)
1593 d->next = display->next;
1597 free_display (display);
1600 /* Call FUNCTION on each of the displays whose numbers are given in
1601 ARGS. DATA is passed unmodified to FUNCTION. */
1604 map_display_numbers (char *args,
1605 void (*function) (struct display *,
1609 struct get_number_or_range_state state;
1613 error_no_arg (_("one or more display numbers"));
1615 init_number_or_range (&state, args);
1617 while (!state.finished)
1619 char *p = state.string;
1621 num = get_number_or_range (&state);
1623 warning (_("bad display number at or near '%s'"), p);
1626 struct display *d, *tmp;
1628 ALL_DISPLAYS_SAFE (d, tmp)
1629 if (d->number == num)
1632 printf_unfiltered (_("No display number %d.\n"), num);
1639 /* Callback for map_display_numbers, that deletes a display. */
1642 do_delete_display (struct display *d, void *data)
1647 /* "undisplay" command. */
1650 undisplay_command (char *args, int from_tty)
1654 if (query (_("Delete all auto-display expressions? ")))
1660 map_display_numbers (args, do_delete_display, NULL);
1664 /* Display a single auto-display.
1665 Do nothing if the display cannot be printed in the current context,
1666 or if the display is disabled. */
1669 do_one_display (struct display *d)
1671 struct cleanup *old_chain;
1672 int within_current_scope;
1674 if (d->enabled_p == 0)
1677 /* The expression carries the architecture that was used at parse time.
1678 This is a problem if the expression depends on architecture features
1679 (e.g. register numbers), and the current architecture is now different.
1680 For example, a display statement like "display/i $pc" is expected to
1681 display the PC register of the current architecture, not the arch at
1682 the time the display command was given. Therefore, we re-parse the
1683 expression if the current architecture has changed. */
1684 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ())
1693 volatile struct gdb_exception ex;
1695 TRY_CATCH (ex, RETURN_MASK_ALL)
1697 innermost_block = NULL;
1698 d->exp = parse_expression (d->exp_string);
1699 d->block = innermost_block;
1703 /* Can't re-parse the expression. Disable this display item. */
1705 warning (_("Unable to display \"%s\": %s"),
1706 d->exp_string, ex.message);
1713 if (d->pspace == current_program_space)
1714 within_current_scope = contained_in (get_selected_block (0), d->block);
1716 within_current_scope = 0;
1719 within_current_scope = 1;
1720 if (!within_current_scope)
1723 old_chain = make_cleanup_restore_integer (¤t_display_number);
1724 current_display_number = d->number;
1726 annotate_display_begin ();
1727 printf_filtered ("%d", d->number);
1728 annotate_display_number_end ();
1729 printf_filtered (": ");
1732 volatile struct gdb_exception ex;
1734 annotate_display_format ();
1736 printf_filtered ("x/");
1737 if (d->format.count != 1)
1738 printf_filtered ("%d", d->format.count);
1739 printf_filtered ("%c", d->format.format);
1740 if (d->format.format != 'i' && d->format.format != 's')
1741 printf_filtered ("%c", d->format.size);
1742 printf_filtered (" ");
1744 annotate_display_expression ();
1746 puts_filtered (d->exp_string);
1747 annotate_display_expression_end ();
1749 if (d->format.count != 1 || d->format.format == 'i')
1750 printf_filtered ("\n");
1752 printf_filtered (" ");
1754 annotate_display_value ();
1756 TRY_CATCH (ex, RETURN_MASK_ERROR)
1761 val = evaluate_expression (d->exp);
1762 addr = value_as_address (val);
1763 if (d->format.format == 'i')
1764 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
1765 do_examine (d->format, d->exp->gdbarch, addr);
1768 fprintf_filtered (gdb_stdout, _("<error: %s>\n"), ex.message);
1772 struct value_print_options opts;
1773 volatile struct gdb_exception ex;
1775 annotate_display_format ();
1777 if (d->format.format)
1778 printf_filtered ("/%c ", d->format.format);
1780 annotate_display_expression ();
1782 puts_filtered (d->exp_string);
1783 annotate_display_expression_end ();
1785 printf_filtered (" = ");
1787 annotate_display_expression ();
1789 get_formatted_print_options (&opts, d->format.format);
1790 opts.raw = d->format.raw;
1792 TRY_CATCH (ex, RETURN_MASK_ERROR)
1796 val = evaluate_expression (d->exp);
1797 print_formatted (val, d->format.size, &opts, gdb_stdout);
1800 fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message);
1801 printf_filtered ("\n");
1804 annotate_display_end ();
1806 gdb_flush (gdb_stdout);
1807 do_cleanups (old_chain);
1810 /* Display all of the values on the auto-display chain which can be
1811 evaluated in the current scope. */
1818 for (d = display_chain; d; d = d->next)
1822 /* Delete the auto-display which we were in the process of displaying.
1823 This is done when there is an error or a signal. */
1826 disable_display (int num)
1830 for (d = display_chain; d; d = d->next)
1831 if (d->number == num)
1836 printf_unfiltered (_("No display number %d.\n"), num);
1840 disable_current_display (void)
1842 if (current_display_number >= 0)
1844 disable_display (current_display_number);
1845 fprintf_unfiltered (gdb_stderr,
1846 _("Disabling display %d to "
1847 "avoid infinite recursion.\n"),
1848 current_display_number);
1850 current_display_number = -1;
1854 display_info (char *ignore, int from_tty)
1859 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1861 printf_filtered (_("Auto-display expressions now in effect:\n\
1862 Num Enb Expression\n"));
1864 for (d = display_chain; d; d = d->next)
1866 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1868 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1870 else if (d->format.format)
1871 printf_filtered ("/%c ", d->format.format);
1872 puts_filtered (d->exp_string);
1873 if (d->block && !contained_in (get_selected_block (0), d->block))
1874 printf_filtered (_(" (cannot be evaluated in the current context)"));
1875 printf_filtered ("\n");
1876 gdb_flush (gdb_stdout);
1880 /* Callback fo map_display_numbers, that enables or disables the
1881 passed in display D. */
1884 do_enable_disable_display (struct display *d, void *data)
1886 d->enabled_p = *(int *) data;
1889 /* Implamentation of both the "disable display" and "enable display"
1890 commands. ENABLE decides what to do. */
1893 enable_disable_display_command (char *args, int from_tty, int enable)
1900 d->enabled_p = enable;
1904 map_display_numbers (args, do_enable_disable_display, &enable);
1907 /* The "enable display" command. */
1910 enable_display_command (char *args, int from_tty)
1912 enable_disable_display_command (args, from_tty, 1);
1915 /* The "disable display" command. */
1918 disable_display_command (char *args, int from_tty)
1920 enable_disable_display_command (args, from_tty, 0);
1923 /* display_chain items point to blocks and expressions. Some expressions in
1924 turn may point to symbols.
1925 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1926 obstack_free'd when a shared library is unloaded.
1927 Clear pointers that are about to become dangling.
1928 Both .exp and .block fields will be restored next time we need to display
1929 an item by re-parsing .exp_string field in the new execution context. */
1932 clear_dangling_display_expressions (struct so_list *solib)
1934 struct objfile *objfile = solib->objfile;
1937 /* With no symbol file we cannot have a block or expression from it. */
1938 if (objfile == NULL)
1940 if (objfile->separate_debug_objfile_backlink)
1941 objfile = objfile->separate_debug_objfile_backlink;
1942 gdb_assert (objfile->pspace == solib->pspace);
1944 for (d = display_chain; d != NULL; d = d->next)
1946 if (d->pspace != solib->pspace)
1949 if (lookup_objfile_from_block (d->block) == objfile
1950 || (d->exp && exp_uses_objfile (d->exp, objfile)))
1960 /* Print the value in stack frame FRAME of a variable specified by a
1961 struct symbol. NAME is the name to print; if NULL then VAR's print
1962 name will be used. STREAM is the ui_file on which to print the
1963 value. INDENT specifies the number of indent levels to print
1964 before printing the variable name.
1966 This function invalidates FRAME. */
1969 print_variable_and_value (const char *name, struct symbol *var,
1970 struct frame_info *frame,
1971 struct ui_file *stream, int indent)
1973 volatile struct gdb_exception except;
1976 name = SYMBOL_PRINT_NAME (var);
1978 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name);
1979 TRY_CATCH (except, RETURN_MASK_ERROR)
1982 struct value_print_options opts;
1984 val = read_var_value (var, frame);
1985 get_user_print_options (&opts);
1987 common_val_print (val, stream, indent, &opts, current_language);
1989 /* common_val_print invalidates FRAME when a pretty printer calls inferior
1993 if (except.reason < 0)
1994 fprintf_filtered(stream, "<error reading variable %s (%s)>", name,
1996 fprintf_filtered (stream, "\n");
1999 /* printf "printf format string" ARG to STREAM. */
2002 ui_printf (char *arg, struct ui_file *stream)
2004 struct format_piece *fpieces;
2006 struct value **val_args;
2007 int allocated_args = 20;
2008 struct cleanup *old_cleanups;
2010 val_args = xmalloc (allocated_args * sizeof (struct value *));
2011 old_cleanups = make_cleanup (free_current_contents, &val_args);
2014 error_no_arg (_("format-control string and values to print"));
2016 s = skip_spaces (s);
2018 /* A format string should follow, enveloped in double quotes. */
2020 error (_("Bad format string, missing '\"'."));
2022 fpieces = parse_format_string (&s);
2024 make_cleanup (free_format_pieces_cleanup, &fpieces);
2027 error (_("Bad format string, non-terminated '\"'."));
2029 s = skip_spaces (s);
2031 if (*s != ',' && *s != 0)
2032 error (_("Invalid argument syntax"));
2036 s = skip_spaces (s);
2042 char *current_substring;
2045 for (fr = 0; fpieces[fr].string != NULL; fr++)
2046 if (fpieces[fr].argclass != literal_piece)
2049 /* Now, parse all arguments and evaluate them.
2050 Store the VALUEs in VAL_ARGS. */
2056 if (nargs == allocated_args)
2057 val_args = (struct value **) xrealloc ((char *) val_args,
2058 (allocated_args *= 2)
2059 * sizeof (struct value *));
2061 val_args[nargs] = parse_to_comma_and_eval (&s1);
2069 if (nargs != nargs_wanted)
2070 error (_("Wrong number of arguments for specified format-string"));
2072 /* Now actually print them. */
2074 for (fr = 0; fpieces[fr].string != NULL; fr++)
2076 current_substring = fpieces[fr].string;
2077 switch (fpieces[fr].argclass)
2085 tem = value_as_address (val_args[i]);
2087 /* This is a %s argument. Find the length of the string. */
2093 read_memory (tem + j, &c, 1);
2098 /* Copy the string contents into a string inside GDB. */
2099 str = (gdb_byte *) alloca (j + 1);
2101 read_memory (tem, str, j);
2104 fprintf_filtered (stream, current_substring, (char *) str);
2107 case wide_string_arg:
2112 struct gdbarch *gdbarch
2113 = get_type_arch (value_type (val_args[i]));
2114 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2115 struct type *wctype = lookup_typename (current_language, gdbarch,
2116 "wchar_t", NULL, 0);
2117 int wcwidth = TYPE_LENGTH (wctype);
2118 gdb_byte *buf = alloca (wcwidth);
2119 struct obstack output;
2120 struct cleanup *inner_cleanup;
2122 tem = value_as_address (val_args[i]);
2124 /* This is a %s argument. Find the length of the string. */
2125 for (j = 0;; j += wcwidth)
2128 read_memory (tem + j, buf, wcwidth);
2129 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
2133 /* Copy the string contents into a string inside GDB. */
2134 str = (gdb_byte *) alloca (j + wcwidth);
2136 read_memory (tem, str, j);
2137 memset (&str[j], 0, wcwidth);
2139 obstack_init (&output);
2140 inner_cleanup = make_cleanup_obstack_free (&output);
2142 convert_between_encodings (target_wide_charset (gdbarch),
2145 &output, translit_char);
2146 obstack_grow_str0 (&output, "");
2148 fprintf_filtered (stream, current_substring,
2149 obstack_base (&output));
2150 do_cleanups (inner_cleanup);
2155 struct gdbarch *gdbarch
2156 = get_type_arch (value_type (val_args[i]));
2157 struct type *wctype = lookup_typename (current_language, gdbarch,
2158 "wchar_t", NULL, 0);
2159 struct type *valtype;
2160 struct obstack output;
2161 struct cleanup *inner_cleanup;
2162 const gdb_byte *bytes;
2164 valtype = value_type (val_args[i]);
2165 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2166 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2167 error (_("expected wchar_t argument for %%lc"));
2169 bytes = value_contents (val_args[i]);
2171 obstack_init (&output);
2172 inner_cleanup = make_cleanup_obstack_free (&output);
2174 convert_between_encodings (target_wide_charset (gdbarch),
2176 bytes, TYPE_LENGTH (valtype),
2177 TYPE_LENGTH (valtype),
2178 &output, translit_char);
2179 obstack_grow_str0 (&output, "");
2181 fprintf_filtered (stream, current_substring,
2182 obstack_base (&output));
2183 do_cleanups (inner_cleanup);
2188 struct type *type = value_type (val_args[i]);
2192 /* If format string wants a float, unchecked-convert the value
2193 to floating point of the same size. */
2194 type = float_type_from_length (type);
2195 val = unpack_double (type, value_contents (val_args[i]), &inv);
2197 error (_("Invalid floating value found in program."));
2199 fprintf_filtered (stream, current_substring, (double) val);
2202 case long_double_arg:
2203 #ifdef HAVE_LONG_DOUBLE
2205 struct type *type = value_type (val_args[i]);
2209 /* If format string wants a float, unchecked-convert the value
2210 to floating point of the same size. */
2211 type = float_type_from_length (type);
2212 val = unpack_double (type, value_contents (val_args[i]), &inv);
2214 error (_("Invalid floating value found in program."));
2216 fprintf_filtered (stream, current_substring,
2221 error (_("long double not supported in printf"));
2224 #ifdef PRINTF_HAS_LONG_LONG
2226 long long val = value_as_long (val_args[i]);
2228 fprintf_filtered (stream, current_substring, val);
2232 error (_("long long not supported in printf"));
2236 int val = value_as_long (val_args[i]);
2238 fprintf_filtered (stream, current_substring, val);
2243 long val = value_as_long (val_args[i]);
2245 fprintf_filtered (stream, current_substring, val);
2249 /* Handles decimal floating values. */
2252 const gdb_byte *param_ptr = value_contents (val_args[i]);
2254 #if defined (PRINTF_HAS_DECFLOAT)
2255 /* If we have native support for Decimal floating
2256 printing, handle it here. */
2257 fprintf_filtered (stream, current_substring, param_ptr);
2260 /* As a workaround until vasprintf has native support for DFP
2261 we convert the DFP values to string and print them using
2262 the %s format specifier. */
2265 int nnull_chars = 0;
2267 /* Parameter data. */
2268 struct type *param_type = value_type (val_args[i]);
2269 struct gdbarch *gdbarch = get_type_arch (param_type);
2270 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2272 /* DFP output data. */
2273 struct value *dfp_value = NULL;
2277 struct type *dfp_type = NULL;
2278 char decstr[MAX_DECIMAL_STRING];
2280 /* Points to the end of the string so that we can go back
2281 and check for DFP length modifiers. */
2282 eos = current_substring + strlen (current_substring);
2284 /* Look for the float/double format specifier. */
2285 while (*eos != 'f' && *eos != 'e' && *eos != 'E'
2286 && *eos != 'g' && *eos != 'G')
2291 /* Search for the '%' char and extract the size and type of
2292 the output decimal value based on its modifiers
2293 (%Hf, %Df, %DDf). */
2294 while (*--sos != '%')
2299 dfp_type = builtin_type (gdbarch)->builtin_decfloat;
2301 else if (*sos == 'D' && *(sos - 1) == 'D')
2304 dfp_type = builtin_type (gdbarch)->builtin_declong;
2310 dfp_type = builtin_type (gdbarch)->builtin_decdouble;
2314 /* Replace %Hf, %Df and %DDf with %s's. */
2317 /* Go through the whole format string and pull the correct
2318 number of chars back to compensate for the change in the
2319 format specifier. */
2320 while (nnull_chars < nargs - i)
2328 /* Conversion between different DFP types. */
2329 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2330 decimal_convert (param_ptr, TYPE_LENGTH (param_type),
2331 byte_order, dec, dfp_len, byte_order);
2333 /* If this is a non-trivial conversion, just output 0.
2334 A correct converted value can be displayed by explicitly
2335 casting to a DFP type. */
2336 decimal_from_string (dec, dfp_len, byte_order, "0");
2338 dfp_value = value_from_decfloat (dfp_type, dec);
2340 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2342 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
2344 /* Print the DFP value. */
2345 fprintf_filtered (stream, current_substring, decstr);
2353 /* We avoid the host's %p because pointers are too
2354 likely to be the wrong size. The only interesting
2355 modifier for %p is a width; extract that, and then
2356 handle %p as glibc would: %#x or a literal "(nil)". */
2358 char *p, *fmt, *fmt_p;
2359 #ifdef PRINTF_HAS_LONG_LONG
2360 long long val = value_as_long (val_args[i]);
2362 long val = value_as_long (val_args[i]);
2365 fmt = alloca (strlen (current_substring) + 5);
2367 /* Copy up to the leading %. */
2368 p = current_substring;
2372 int is_percent = (*p == '%');
2387 /* Copy any width. */
2388 while (*p >= '0' && *p < '9')
2391 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2394 #ifdef PRINTF_HAS_LONG_LONG
2400 fprintf_filtered (stream, fmt, val);
2406 fprintf_filtered (stream, fmt, "(nil)");
2412 /* Print a portion of the format string that has no
2413 directives. Note that this will not include any
2414 ordinary %-specs, but it might include "%%". That is
2415 why we use printf_filtered and not puts_filtered here.
2416 Also, we pass a dummy argument because some platforms
2417 have modified GCC to include -Wformat-security by
2418 default, which will warn here if there is no
2420 fprintf_filtered (stream, current_substring, 0);
2423 internal_error (__FILE__, __LINE__,
2424 _("failed internal consistency check"));
2426 /* Maybe advance to the next argument. */
2427 if (fpieces[fr].argclass != literal_piece)
2431 do_cleanups (old_cleanups);
2434 /* Implement the "printf" command. */
2437 printf_command (char *arg, int from_tty)
2439 ui_printf (arg, gdb_stdout);
2442 /* Implement the "eval" command. */
2445 eval_command (char *arg, int from_tty)
2447 struct ui_file *ui_out = mem_fileopen ();
2448 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out);
2451 ui_printf (arg, ui_out);
2453 expanded = ui_file_xstrdup (ui_out, NULL);
2454 make_cleanup (xfree, expanded);
2456 execute_command (expanded, from_tty);
2458 do_cleanups (cleanups);
2462 _initialize_printcmd (void)
2464 struct cmd_list_element *c;
2466 current_display_number = -1;
2468 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2470 add_info ("address", address_info,
2471 _("Describe where symbol SYM is stored."));
2473 add_info ("symbol", sym_info, _("\
2474 Describe what symbol is at location ADDR.\n\
2475 Only for symbols with fixed locations (global or static scope)."));
2477 add_com ("x", class_vars, x_command, _("\
2478 Examine memory: x/FMT ADDRESS.\n\
2479 ADDRESS is an expression for the memory address to examine.\n\
2480 FMT is a repeat count followed by a format letter and a size letter.\n\
2481 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2482 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2483 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2484 The specified number of objects of the specified size are printed\n\
2485 according to the format.\n\n\
2486 Defaults for format and size letters are those previously used.\n\
2487 Default count is 1. Default address is following last thing printed\n\
2488 with this command or \"print\"."));
2491 add_com ("whereis", class_vars, whereis_command,
2492 _("Print line number and file of definition of variable."));
2495 add_info ("display", display_info, _("\
2496 Expressions to display when program stops, with code numbers."));
2498 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2499 Cancel some expressions to be displayed when program stops.\n\
2500 Arguments are the code numbers of the expressions to stop displaying.\n\
2501 No argument means cancel all automatic-display expressions.\n\
2502 \"delete display\" has the same effect as this command.\n\
2503 Do \"info display\" to see current list of code numbers."),
2506 add_com ("display", class_vars, display_command, _("\
2507 Print value of expression EXP each time the program stops.\n\
2508 /FMT may be used before EXP as in the \"print\" command.\n\
2509 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2510 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2511 and examining is done as in the \"x\" command.\n\n\
2512 With no argument, display all currently requested auto-display expressions.\n\
2513 Use \"undisplay\" to cancel display requests previously made."));
2515 add_cmd ("display", class_vars, enable_display_command, _("\
2516 Enable some expressions to be displayed when program stops.\n\
2517 Arguments are the code numbers of the expressions to resume displaying.\n\
2518 No argument means enable all automatic-display expressions.\n\
2519 Do \"info display\" to see current list of code numbers."), &enablelist);
2521 add_cmd ("display", class_vars, disable_display_command, _("\
2522 Disable some expressions to be displayed when program stops.\n\
2523 Arguments are the code numbers of the expressions to stop displaying.\n\
2524 No argument means disable all automatic-display expressions.\n\
2525 Do \"info display\" to see current list of code numbers."), &disablelist);
2527 add_cmd ("display", class_vars, undisplay_command, _("\
2528 Cancel some expressions to be displayed when program stops.\n\
2529 Arguments are the code numbers of the expressions to stop displaying.\n\
2530 No argument means cancel all automatic-display expressions.\n\
2531 Do \"info display\" to see current list of code numbers."), &deletelist);
2533 add_com ("printf", class_vars, printf_command, _("\
2534 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2535 This is useful for formatted output in user-defined commands."));
2537 add_com ("output", class_vars, output_command, _("\
2538 Like \"print\" but don't put in value history and don't print newline.\n\
2539 This is useful in user-defined commands."));
2541 add_prefix_cmd ("set", class_vars, set_command, _("\
2542 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2543 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2544 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2545 with $), a register (a few standard names starting with $), or an actual\n\
2546 variable in the program being debugged. EXP is any valid expression.\n\
2547 Use \"set variable\" for variables with names identical to set subcommands.\n\
2549 With a subcommand, this command modifies parts of the gdb environment.\n\
2550 You can see these environment settings with the \"show\" command."),
2551 &setlist, "set ", 1, &cmdlist);
2553 add_com ("assign", class_vars, set_command, _("\
2554 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2555 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2556 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2557 with $), a register (a few standard names starting with $), or an actual\n\
2558 variable in the program being debugged. EXP is any valid expression.\n\
2559 Use \"set variable\" for variables with names identical to set subcommands.\n\
2560 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2561 You can see these environment settings with the \"show\" command."));
2563 /* "call" is the same as "set", but handy for dbx users to call fns. */
2564 c = add_com ("call", class_vars, call_command, _("\
2565 Call a function in the program.\n\
2566 The argument is the function name and arguments, in the notation of the\n\
2567 current working language. The result is printed and saved in the value\n\
2568 history, if it is not void."));
2569 set_cmd_completer (c, expression_completer);
2571 add_cmd ("variable", class_vars, set_command, _("\
2572 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2573 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2574 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2575 with $), a register (a few standard names starting with $), or an actual\n\
2576 variable in the program being debugged. EXP is any valid expression.\n\
2577 This may usually be abbreviated to simply \"set\"."),
2580 c = add_com ("print", class_vars, print_command, _("\
2581 Print value of expression EXP.\n\
2582 Variables accessible are those of the lexical environment of the selected\n\
2583 stack frame, plus all those whose scope is global or an entire file.\n\
2585 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2586 $$NUM refers to NUM'th value back from the last one.\n\
2587 Names starting with $ refer to registers (with the values they would have\n\
2588 if the program were to return to the stack frame now selected, restoring\n\
2589 all registers saved by frames farther in) or else to debugger\n\
2590 \"convenience\" variables (any such name not a known register).\n\
2591 Use assignment expressions to give values to convenience variables.\n\
2593 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2594 @ is a binary operator for treating consecutive data objects\n\
2595 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2596 element is FOO, whose second element is stored in the space following\n\
2597 where FOO is stored, etc. FOO must be an expression whose value\n\
2598 resides in memory.\n\
2600 EXP may be preceded with /FMT, where FMT is a format letter\n\
2601 but no count or size letter (see \"x\" command)."));
2602 set_cmd_completer (c, expression_completer);
2603 add_com_alias ("p", "print", class_vars, 1);
2605 c = add_com ("inspect", class_vars, inspect_command, _("\
2606 Same as \"print\" command, except that if you are running in the epoch\n\
2607 environment, the value is printed in its own window."));
2608 set_cmd_completer (c, expression_completer);
2610 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2611 &max_symbolic_offset, _("\
2612 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2613 Show the largest offset that will be printed in <symbol+1234> form."), NULL,
2615 show_max_symbolic_offset,
2616 &setprintlist, &showprintlist);
2617 add_setshow_boolean_cmd ("symbol-filename", no_class,
2618 &print_symbol_filename, _("\
2619 Set printing of source filename and line number with <symbol>."), _("\
2620 Show printing of source filename and line number with <symbol>."), NULL,
2622 show_print_symbol_filename,
2623 &setprintlist, &showprintlist);
2625 add_com ("eval", no_class, eval_command, _("\
2626 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2627 a command line, and call it."));