1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986-2013 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 struct field_of_this_result is_a_field_of_this;
1205 error (_("Argument required."));
1207 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
1208 &is_a_field_of_this);
1211 if (is_a_field_of_this.type != NULL)
1213 printf_filtered ("Symbol \"");
1214 fprintf_symbol_filtered (gdb_stdout, exp,
1215 current_language->la_language, DMGL_ANSI);
1216 printf_filtered ("\" is a field of the local class variable ");
1217 if (current_language->la_language == language_objc)
1218 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1220 printf_filtered ("`this'\n");
1224 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1226 if (msymbol != NULL)
1228 gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
1229 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1231 printf_filtered ("Symbol \"");
1232 fprintf_symbol_filtered (gdb_stdout, exp,
1233 current_language->la_language, DMGL_ANSI);
1234 printf_filtered ("\" is at ");
1235 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1236 printf_filtered (" in a file compiled without debugging");
1237 section = SYMBOL_OBJ_SECTION (msymbol);
1238 if (section_is_overlay (section))
1240 load_addr = overlay_unmapped_address (load_addr, section);
1241 printf_filtered (",\n -- loaded at ");
1242 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1243 printf_filtered (" in overlay section %s",
1244 section->the_bfd_section->name);
1246 printf_filtered (".\n");
1249 error (_("No symbol \"%s\" in current context."), exp);
1253 printf_filtered ("Symbol \"");
1254 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1255 current_language->la_language, DMGL_ANSI);
1256 printf_filtered ("\" is ");
1257 val = SYMBOL_VALUE (sym);
1258 section = SYMBOL_OBJ_SECTION (sym);
1259 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1261 switch (SYMBOL_CLASS (sym))
1264 case LOC_CONST_BYTES:
1265 printf_filtered ("constant");
1269 printf_filtered ("a label at address ");
1270 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1271 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1272 if (section_is_overlay (section))
1274 load_addr = overlay_unmapped_address (load_addr, section);
1275 printf_filtered (",\n -- loaded at ");
1276 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1277 printf_filtered (" in overlay section %s",
1278 section->the_bfd_section->name);
1283 /* FIXME: cagney/2004-01-26: It should be possible to
1284 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1285 Unfortunately DWARF 2 stores the frame-base (instead of the
1286 function) location in a function's symbol. Oops! For the
1287 moment enable this when/where applicable. */
1288 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
1293 /* GDBARCH is the architecture associated with the objfile the symbol
1294 is defined in; the target architecture may be different, and may
1295 provide additional registers. However, we do not know the target
1296 architecture at this point. We assume the objfile architecture
1297 will contain all the standard registers that occur in debug info
1299 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1301 if (SYMBOL_IS_ARGUMENT (sym))
1302 printf_filtered (_("an argument in register %s"),
1303 gdbarch_register_name (gdbarch, regno));
1305 printf_filtered (_("a variable in register %s"),
1306 gdbarch_register_name (gdbarch, regno));
1310 printf_filtered (_("static storage at address "));
1311 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1312 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1313 if (section_is_overlay (section))
1315 load_addr = overlay_unmapped_address (load_addr, section);
1316 printf_filtered (_(",\n -- loaded at "));
1317 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1318 printf_filtered (_(" in overlay section %s"),
1319 section->the_bfd_section->name);
1323 case LOC_REGPARM_ADDR:
1324 /* Note comment at LOC_REGISTER. */
1325 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1326 printf_filtered (_("address of an argument in register %s"),
1327 gdbarch_register_name (gdbarch, regno));
1331 printf_filtered (_("an argument at offset %ld"), val);
1335 printf_filtered (_("a local variable at frame offset %ld"), val);
1339 printf_filtered (_("a reference argument at offset %ld"), val);
1343 printf_filtered (_("a typedef"));
1347 printf_filtered (_("a function at address "));
1348 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1349 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1350 if (section_is_overlay (section))
1352 load_addr = overlay_unmapped_address (load_addr, section);
1353 printf_filtered (_(",\n -- loaded at "));
1354 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1355 printf_filtered (_(" in overlay section %s"),
1356 section->the_bfd_section->name);
1360 case LOC_UNRESOLVED:
1362 struct minimal_symbol *msym;
1364 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
1366 printf_filtered ("unresolved");
1369 section = SYMBOL_OBJ_SECTION (msym);
1370 load_addr = SYMBOL_VALUE_ADDRESS (msym);
1373 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1374 printf_filtered (_("a thread-local variable at offset %s "
1375 "in the thread-local storage for `%s'"),
1376 paddress (gdbarch, load_addr),
1377 section->objfile->name);
1380 printf_filtered (_("static storage at address "));
1381 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1382 if (section_is_overlay (section))
1384 load_addr = overlay_unmapped_address (load_addr, section);
1385 printf_filtered (_(",\n -- loaded at "));
1386 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1387 printf_filtered (_(" in overlay section %s"),
1388 section->the_bfd_section->name);
1395 case LOC_OPTIMIZED_OUT:
1396 printf_filtered (_("optimized out"));
1400 printf_filtered (_("of unknown (botched) type"));
1403 printf_filtered (".\n");
1408 x_command (char *exp, int from_tty)
1410 struct expression *expr;
1411 struct format_data fmt;
1412 struct cleanup *old_chain;
1415 fmt.format = last_format ? last_format : 'x';
1416 fmt.size = last_size;
1420 if (exp && *exp == '/')
1423 fmt = decode_format (&exp, last_format, last_size);
1426 /* If we have an expression, evaluate it and use it as the address. */
1428 if (exp != 0 && *exp != 0)
1430 expr = parse_expression (exp);
1431 /* Cause expression not to be there any more if this command is
1432 repeated with Newline. But don't clobber a user-defined
1433 command's definition. */
1436 old_chain = make_cleanup (free_current_contents, &expr);
1437 val = evaluate_expression (expr);
1438 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1439 val = coerce_ref (val);
1440 /* In rvalue contexts, such as this, functions are coerced into
1441 pointers to functions. This makes "x/i main" work. */
1442 if (/* last_format == 'i' && */
1443 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1444 && VALUE_LVAL (val) == lval_memory)
1445 next_address = value_address (val);
1447 next_address = value_as_address (val);
1449 next_gdbarch = expr->gdbarch;
1450 do_cleanups (old_chain);
1454 error_no_arg (_("starting display address"));
1456 do_examine (fmt, next_gdbarch, next_address);
1458 /* If the examine succeeds, we remember its size and format for next
1459 time. Set last_size to 'b' for strings. */
1460 if (fmt.format == 's')
1463 last_size = fmt.size;
1464 last_format = fmt.format;
1466 /* Set a couple of internal variables if appropriate. */
1467 if (last_examine_value)
1469 /* Make last address examined available to the user as $_. Use
1470 the correct pointer type. */
1471 struct type *pointer_type
1472 = lookup_pointer_type (value_type (last_examine_value));
1473 set_internalvar (lookup_internalvar ("_"),
1474 value_from_pointer (pointer_type,
1475 last_examine_address));
1477 /* Make contents of last address examined available to the user
1478 as $__. If the last value has not been fetched from memory
1479 then don't fetch it now; instead mark it by voiding the $__
1481 if (value_lazy (last_examine_value))
1482 clear_internalvar (lookup_internalvar ("__"));
1484 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1489 /* Add an expression to the auto-display chain.
1490 Specify the expression. */
1493 display_command (char *exp, int from_tty)
1495 struct format_data fmt;
1496 struct expression *expr;
1497 struct display *new;
1501 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1503 if (tui_active && exp != NULL && *exp == '$')
1504 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1518 fmt = decode_format (&exp, 0, 0);
1519 if (fmt.size && fmt.format == 0)
1521 if (fmt.format == 'i' || fmt.format == 's')
1532 innermost_block = NULL;
1533 expr = parse_expression (exp);
1535 new = (struct display *) xmalloc (sizeof (struct display));
1537 new->exp_string = xstrdup (exp);
1539 new->block = innermost_block;
1540 new->pspace = current_program_space;
1541 new->next = display_chain;
1542 new->number = ++display_number;
1545 display_chain = new;
1547 if (from_tty && target_has_execution)
1548 do_one_display (new);
1555 free_display (struct display *d)
1557 xfree (d->exp_string);
1562 /* Clear out the display_chain. Done when new symtabs are loaded,
1563 since this invalidates the types stored in many expressions. */
1566 clear_displays (void)
1570 while ((d = display_chain) != NULL)
1572 display_chain = d->next;
1577 /* Delete the auto-display DISPLAY. */
1580 delete_display (struct display *display)
1584 gdb_assert (display != NULL);
1586 if (display_chain == display)
1587 display_chain = display->next;
1590 if (d->next == display)
1592 d->next = display->next;
1596 free_display (display);
1599 /* Call FUNCTION on each of the displays whose numbers are given in
1600 ARGS. DATA is passed unmodified to FUNCTION. */
1603 map_display_numbers (char *args,
1604 void (*function) (struct display *,
1608 struct get_number_or_range_state state;
1612 error_no_arg (_("one or more display numbers"));
1614 init_number_or_range (&state, args);
1616 while (!state.finished)
1618 char *p = state.string;
1620 num = get_number_or_range (&state);
1622 warning (_("bad display number at or near '%s'"), p);
1625 struct display *d, *tmp;
1627 ALL_DISPLAYS_SAFE (d, tmp)
1628 if (d->number == num)
1631 printf_unfiltered (_("No display number %d.\n"), num);
1638 /* Callback for map_display_numbers, that deletes a display. */
1641 do_delete_display (struct display *d, void *data)
1646 /* "undisplay" command. */
1649 undisplay_command (char *args, int from_tty)
1653 if (query (_("Delete all auto-display expressions? ")))
1659 map_display_numbers (args, do_delete_display, NULL);
1663 /* Display a single auto-display.
1664 Do nothing if the display cannot be printed in the current context,
1665 or if the display is disabled. */
1668 do_one_display (struct display *d)
1670 struct cleanup *old_chain;
1671 int within_current_scope;
1673 if (d->enabled_p == 0)
1676 /* The expression carries the architecture that was used at parse time.
1677 This is a problem if the expression depends on architecture features
1678 (e.g. register numbers), and the current architecture is now different.
1679 For example, a display statement like "display/i $pc" is expected to
1680 display the PC register of the current architecture, not the arch at
1681 the time the display command was given. Therefore, we re-parse the
1682 expression if the current architecture has changed. */
1683 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ())
1692 volatile struct gdb_exception ex;
1694 TRY_CATCH (ex, RETURN_MASK_ALL)
1696 innermost_block = NULL;
1697 d->exp = parse_expression (d->exp_string);
1698 d->block = innermost_block;
1702 /* Can't re-parse the expression. Disable this display item. */
1704 warning (_("Unable to display \"%s\": %s"),
1705 d->exp_string, ex.message);
1712 if (d->pspace == current_program_space)
1713 within_current_scope = contained_in (get_selected_block (0), d->block);
1715 within_current_scope = 0;
1718 within_current_scope = 1;
1719 if (!within_current_scope)
1722 old_chain = make_cleanup_restore_integer (¤t_display_number);
1723 current_display_number = d->number;
1725 annotate_display_begin ();
1726 printf_filtered ("%d", d->number);
1727 annotate_display_number_end ();
1728 printf_filtered (": ");
1731 volatile struct gdb_exception ex;
1733 annotate_display_format ();
1735 printf_filtered ("x/");
1736 if (d->format.count != 1)
1737 printf_filtered ("%d", d->format.count);
1738 printf_filtered ("%c", d->format.format);
1739 if (d->format.format != 'i' && d->format.format != 's')
1740 printf_filtered ("%c", d->format.size);
1741 printf_filtered (" ");
1743 annotate_display_expression ();
1745 puts_filtered (d->exp_string);
1746 annotate_display_expression_end ();
1748 if (d->format.count != 1 || d->format.format == 'i')
1749 printf_filtered ("\n");
1751 printf_filtered (" ");
1753 annotate_display_value ();
1755 TRY_CATCH (ex, RETURN_MASK_ERROR)
1760 val = evaluate_expression (d->exp);
1761 addr = value_as_address (val);
1762 if (d->format.format == 'i')
1763 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
1764 do_examine (d->format, d->exp->gdbarch, addr);
1767 fprintf_filtered (gdb_stdout, _("<error: %s>\n"), ex.message);
1771 struct value_print_options opts;
1772 volatile struct gdb_exception ex;
1774 annotate_display_format ();
1776 if (d->format.format)
1777 printf_filtered ("/%c ", d->format.format);
1779 annotate_display_expression ();
1781 puts_filtered (d->exp_string);
1782 annotate_display_expression_end ();
1784 printf_filtered (" = ");
1786 annotate_display_expression ();
1788 get_formatted_print_options (&opts, d->format.format);
1789 opts.raw = d->format.raw;
1791 TRY_CATCH (ex, RETURN_MASK_ERROR)
1795 val = evaluate_expression (d->exp);
1796 print_formatted (val, d->format.size, &opts, gdb_stdout);
1799 fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message);
1800 printf_filtered ("\n");
1803 annotate_display_end ();
1805 gdb_flush (gdb_stdout);
1806 do_cleanups (old_chain);
1809 /* Display all of the values on the auto-display chain which can be
1810 evaluated in the current scope. */
1817 for (d = display_chain; d; d = d->next)
1821 /* Delete the auto-display which we were in the process of displaying.
1822 This is done when there is an error or a signal. */
1825 disable_display (int num)
1829 for (d = display_chain; d; d = d->next)
1830 if (d->number == num)
1835 printf_unfiltered (_("No display number %d.\n"), num);
1839 disable_current_display (void)
1841 if (current_display_number >= 0)
1843 disable_display (current_display_number);
1844 fprintf_unfiltered (gdb_stderr,
1845 _("Disabling display %d to "
1846 "avoid infinite recursion.\n"),
1847 current_display_number);
1849 current_display_number = -1;
1853 display_info (char *ignore, int from_tty)
1858 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1860 printf_filtered (_("Auto-display expressions now in effect:\n\
1861 Num Enb Expression\n"));
1863 for (d = display_chain; d; d = d->next)
1865 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1867 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1869 else if (d->format.format)
1870 printf_filtered ("/%c ", d->format.format);
1871 puts_filtered (d->exp_string);
1872 if (d->block && !contained_in (get_selected_block (0), d->block))
1873 printf_filtered (_(" (cannot be evaluated in the current context)"));
1874 printf_filtered ("\n");
1875 gdb_flush (gdb_stdout);
1879 /* Callback fo map_display_numbers, that enables or disables the
1880 passed in display D. */
1883 do_enable_disable_display (struct display *d, void *data)
1885 d->enabled_p = *(int *) data;
1888 /* Implamentation of both the "disable display" and "enable display"
1889 commands. ENABLE decides what to do. */
1892 enable_disable_display_command (char *args, int from_tty, int enable)
1899 d->enabled_p = enable;
1903 map_display_numbers (args, do_enable_disable_display, &enable);
1906 /* The "enable display" command. */
1909 enable_display_command (char *args, int from_tty)
1911 enable_disable_display_command (args, from_tty, 1);
1914 /* The "disable display" command. */
1917 disable_display_command (char *args, int from_tty)
1919 enable_disable_display_command (args, from_tty, 0);
1922 /* display_chain items point to blocks and expressions. Some expressions in
1923 turn may point to symbols.
1924 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1925 obstack_free'd when a shared library is unloaded.
1926 Clear pointers that are about to become dangling.
1927 Both .exp and .block fields will be restored next time we need to display
1928 an item by re-parsing .exp_string field in the new execution context. */
1931 clear_dangling_display_expressions (struct so_list *solib)
1933 struct objfile *objfile = solib->objfile;
1936 /* With no symbol file we cannot have a block or expression from it. */
1937 if (objfile == NULL)
1939 if (objfile->separate_debug_objfile_backlink)
1940 objfile = objfile->separate_debug_objfile_backlink;
1941 gdb_assert (objfile->pspace == solib->pspace);
1943 for (d = display_chain; d != NULL; d = d->next)
1945 if (d->pspace != solib->pspace)
1948 if (lookup_objfile_from_block (d->block) == objfile
1949 || (d->exp && exp_uses_objfile (d->exp, objfile)))
1959 /* Print the value in stack frame FRAME of a variable specified by a
1960 struct symbol. NAME is the name to print; if NULL then VAR's print
1961 name will be used. STREAM is the ui_file on which to print the
1962 value. INDENT specifies the number of indent levels to print
1963 before printing the variable name.
1965 This function invalidates FRAME. */
1968 print_variable_and_value (const char *name, struct symbol *var,
1969 struct frame_info *frame,
1970 struct ui_file *stream, int indent)
1972 volatile struct gdb_exception except;
1975 name = SYMBOL_PRINT_NAME (var);
1977 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name);
1978 TRY_CATCH (except, RETURN_MASK_ERROR)
1981 struct value_print_options opts;
1983 val = read_var_value (var, frame);
1984 get_user_print_options (&opts);
1986 common_val_print (val, stream, indent, &opts, current_language);
1988 /* common_val_print invalidates FRAME when a pretty printer calls inferior
1992 if (except.reason < 0)
1993 fprintf_filtered(stream, "<error reading variable %s (%s)>", name,
1995 fprintf_filtered (stream, "\n");
1998 /* printf "printf format string" ARG to STREAM. */
2001 ui_printf (char *arg, struct ui_file *stream)
2003 struct format_piece *fpieces;
2005 struct value **val_args;
2006 int allocated_args = 20;
2007 struct cleanup *old_cleanups;
2009 val_args = xmalloc (allocated_args * sizeof (struct value *));
2010 old_cleanups = make_cleanup (free_current_contents, &val_args);
2013 error_no_arg (_("format-control string and values to print"));
2015 s = skip_spaces (s);
2017 /* A format string should follow, enveloped in double quotes. */
2019 error (_("Bad format string, missing '\"'."));
2021 fpieces = parse_format_string (&s);
2023 make_cleanup (free_format_pieces_cleanup, &fpieces);
2026 error (_("Bad format string, non-terminated '\"'."));
2028 s = skip_spaces (s);
2030 if (*s != ',' && *s != 0)
2031 error (_("Invalid argument syntax"));
2035 s = skip_spaces (s);
2041 char *current_substring;
2044 for (fr = 0; fpieces[fr].string != NULL; fr++)
2045 if (fpieces[fr].argclass != literal_piece)
2048 /* Now, parse all arguments and evaluate them.
2049 Store the VALUEs in VAL_ARGS. */
2055 if (nargs == allocated_args)
2056 val_args = (struct value **) xrealloc ((char *) val_args,
2057 (allocated_args *= 2)
2058 * sizeof (struct value *));
2060 val_args[nargs] = parse_to_comma_and_eval (&s1);
2068 if (nargs != nargs_wanted)
2069 error (_("Wrong number of arguments for specified format-string"));
2071 /* Now actually print them. */
2073 for (fr = 0; fpieces[fr].string != NULL; fr++)
2075 current_substring = fpieces[fr].string;
2076 switch (fpieces[fr].argclass)
2084 tem = value_as_address (val_args[i]);
2086 /* This is a %s argument. Find the length of the string. */
2092 read_memory (tem + j, &c, 1);
2097 /* Copy the string contents into a string inside GDB. */
2098 str = (gdb_byte *) alloca (j + 1);
2100 read_memory (tem, str, j);
2103 fprintf_filtered (stream, current_substring, (char *) str);
2106 case wide_string_arg:
2111 struct gdbarch *gdbarch
2112 = get_type_arch (value_type (val_args[i]));
2113 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2114 struct type *wctype = lookup_typename (current_language, gdbarch,
2115 "wchar_t", NULL, 0);
2116 int wcwidth = TYPE_LENGTH (wctype);
2117 gdb_byte *buf = alloca (wcwidth);
2118 struct obstack output;
2119 struct cleanup *inner_cleanup;
2121 tem = value_as_address (val_args[i]);
2123 /* This is a %s argument. Find the length of the string. */
2124 for (j = 0;; j += wcwidth)
2127 read_memory (tem + j, buf, wcwidth);
2128 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
2132 /* Copy the string contents into a string inside GDB. */
2133 str = (gdb_byte *) alloca (j + wcwidth);
2135 read_memory (tem, str, j);
2136 memset (&str[j], 0, wcwidth);
2138 obstack_init (&output);
2139 inner_cleanup = make_cleanup_obstack_free (&output);
2141 convert_between_encodings (target_wide_charset (gdbarch),
2144 &output, translit_char);
2145 obstack_grow_str0 (&output, "");
2147 fprintf_filtered (stream, current_substring,
2148 obstack_base (&output));
2149 do_cleanups (inner_cleanup);
2154 struct gdbarch *gdbarch
2155 = get_type_arch (value_type (val_args[i]));
2156 struct type *wctype = lookup_typename (current_language, gdbarch,
2157 "wchar_t", NULL, 0);
2158 struct type *valtype;
2159 struct obstack output;
2160 struct cleanup *inner_cleanup;
2161 const gdb_byte *bytes;
2163 valtype = value_type (val_args[i]);
2164 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2165 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2166 error (_("expected wchar_t argument for %%lc"));
2168 bytes = value_contents (val_args[i]);
2170 obstack_init (&output);
2171 inner_cleanup = make_cleanup_obstack_free (&output);
2173 convert_between_encodings (target_wide_charset (gdbarch),
2175 bytes, TYPE_LENGTH (valtype),
2176 TYPE_LENGTH (valtype),
2177 &output, translit_char);
2178 obstack_grow_str0 (&output, "");
2180 fprintf_filtered (stream, current_substring,
2181 obstack_base (&output));
2182 do_cleanups (inner_cleanup);
2187 struct type *type = value_type (val_args[i]);
2191 /* If format string wants a float, unchecked-convert the value
2192 to floating point of the same size. */
2193 type = float_type_from_length (type);
2194 val = unpack_double (type, value_contents (val_args[i]), &inv);
2196 error (_("Invalid floating value found in program."));
2198 fprintf_filtered (stream, current_substring, (double) val);
2201 case long_double_arg:
2202 #ifdef HAVE_LONG_DOUBLE
2204 struct type *type = value_type (val_args[i]);
2208 /* If format string wants a float, unchecked-convert the value
2209 to floating point of the same size. */
2210 type = float_type_from_length (type);
2211 val = unpack_double (type, value_contents (val_args[i]), &inv);
2213 error (_("Invalid floating value found in program."));
2215 fprintf_filtered (stream, current_substring,
2220 error (_("long double not supported in printf"));
2223 #ifdef PRINTF_HAS_LONG_LONG
2225 long long val = value_as_long (val_args[i]);
2227 fprintf_filtered (stream, current_substring, val);
2231 error (_("long long not supported in printf"));
2235 int val = value_as_long (val_args[i]);
2237 fprintf_filtered (stream, current_substring, val);
2242 long val = value_as_long (val_args[i]);
2244 fprintf_filtered (stream, current_substring, val);
2248 /* Handles decimal floating values. */
2251 const gdb_byte *param_ptr = value_contents (val_args[i]);
2253 #if defined (PRINTF_HAS_DECFLOAT)
2254 /* If we have native support for Decimal floating
2255 printing, handle it here. */
2256 fprintf_filtered (stream, current_substring, param_ptr);
2259 /* As a workaround until vasprintf has native support for DFP
2260 we convert the DFP values to string and print them using
2261 the %s format specifier. */
2264 int nnull_chars = 0;
2266 /* Parameter data. */
2267 struct type *param_type = value_type (val_args[i]);
2268 struct gdbarch *gdbarch = get_type_arch (param_type);
2269 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2271 /* DFP output data. */
2272 struct value *dfp_value = NULL;
2276 struct type *dfp_type = NULL;
2277 char decstr[MAX_DECIMAL_STRING];
2279 /* Points to the end of the string so that we can go back
2280 and check for DFP length modifiers. */
2281 eos = current_substring + strlen (current_substring);
2283 /* Look for the float/double format specifier. */
2284 while (*eos != 'f' && *eos != 'e' && *eos != 'E'
2285 && *eos != 'g' && *eos != 'G')
2290 /* Search for the '%' char and extract the size and type of
2291 the output decimal value based on its modifiers
2292 (%Hf, %Df, %DDf). */
2293 while (*--sos != '%')
2298 dfp_type = builtin_type (gdbarch)->builtin_decfloat;
2300 else if (*sos == 'D' && *(sos - 1) == 'D')
2303 dfp_type = builtin_type (gdbarch)->builtin_declong;
2309 dfp_type = builtin_type (gdbarch)->builtin_decdouble;
2313 /* Replace %Hf, %Df and %DDf with %s's. */
2316 /* Go through the whole format string and pull the correct
2317 number of chars back to compensate for the change in the
2318 format specifier. */
2319 while (nnull_chars < nargs - i)
2327 /* Conversion between different DFP types. */
2328 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2329 decimal_convert (param_ptr, TYPE_LENGTH (param_type),
2330 byte_order, dec, dfp_len, byte_order);
2332 /* If this is a non-trivial conversion, just output 0.
2333 A correct converted value can be displayed by explicitly
2334 casting to a DFP type. */
2335 decimal_from_string (dec, dfp_len, byte_order, "0");
2337 dfp_value = value_from_decfloat (dfp_type, dec);
2339 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2341 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
2343 /* Print the DFP value. */
2344 fprintf_filtered (stream, current_substring, decstr);
2352 /* We avoid the host's %p because pointers are too
2353 likely to be the wrong size. The only interesting
2354 modifier for %p is a width; extract that, and then
2355 handle %p as glibc would: %#x or a literal "(nil)". */
2357 char *p, *fmt, *fmt_p;
2358 #ifdef PRINTF_HAS_LONG_LONG
2359 long long val = value_as_long (val_args[i]);
2361 long val = value_as_long (val_args[i]);
2364 fmt = alloca (strlen (current_substring) + 5);
2366 /* Copy up to the leading %. */
2367 p = current_substring;
2371 int is_percent = (*p == '%');
2386 /* Copy any width. */
2387 while (*p >= '0' && *p < '9')
2390 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2393 #ifdef PRINTF_HAS_LONG_LONG
2399 fprintf_filtered (stream, fmt, val);
2405 fprintf_filtered (stream, fmt, "(nil)");
2411 /* Print a portion of the format string that has no
2412 directives. Note that this will not include any
2413 ordinary %-specs, but it might include "%%". That is
2414 why we use printf_filtered and not puts_filtered here.
2415 Also, we pass a dummy argument because some platforms
2416 have modified GCC to include -Wformat-security by
2417 default, which will warn here if there is no
2419 fprintf_filtered (stream, current_substring, 0);
2422 internal_error (__FILE__, __LINE__,
2423 _("failed internal consistency check"));
2425 /* Maybe advance to the next argument. */
2426 if (fpieces[fr].argclass != literal_piece)
2430 do_cleanups (old_cleanups);
2433 /* Implement the "printf" command. */
2436 printf_command (char *arg, int from_tty)
2438 ui_printf (arg, gdb_stdout);
2441 /* Implement the "eval" command. */
2444 eval_command (char *arg, int from_tty)
2446 struct ui_file *ui_out = mem_fileopen ();
2447 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out);
2450 ui_printf (arg, ui_out);
2452 expanded = ui_file_xstrdup (ui_out, NULL);
2453 make_cleanup (xfree, expanded);
2455 execute_command (expanded, from_tty);
2457 do_cleanups (cleanups);
2461 _initialize_printcmd (void)
2463 struct cmd_list_element *c;
2465 current_display_number = -1;
2467 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2469 add_info ("address", address_info,
2470 _("Describe where symbol SYM is stored."));
2472 add_info ("symbol", sym_info, _("\
2473 Describe what symbol is at location ADDR.\n\
2474 Only for symbols with fixed locations (global or static scope)."));
2476 add_com ("x", class_vars, x_command, _("\
2477 Examine memory: x/FMT ADDRESS.\n\
2478 ADDRESS is an expression for the memory address to examine.\n\
2479 FMT is a repeat count followed by a format letter and a size letter.\n\
2480 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2481 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2482 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2483 The specified number of objects of the specified size are printed\n\
2484 according to the format.\n\n\
2485 Defaults for format and size letters are those previously used.\n\
2486 Default count is 1. Default address is following last thing printed\n\
2487 with this command or \"print\"."));
2490 add_com ("whereis", class_vars, whereis_command,
2491 _("Print line number and file of definition of variable."));
2494 add_info ("display", display_info, _("\
2495 Expressions to display when program stops, with code numbers."));
2497 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2498 Cancel some expressions to be displayed when program stops.\n\
2499 Arguments are the code numbers of the expressions to stop displaying.\n\
2500 No argument means cancel all automatic-display expressions.\n\
2501 \"delete display\" has the same effect as this command.\n\
2502 Do \"info display\" to see current list of code numbers."),
2505 add_com ("display", class_vars, display_command, _("\
2506 Print value of expression EXP each time the program stops.\n\
2507 /FMT may be used before EXP as in the \"print\" command.\n\
2508 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2509 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2510 and examining is done as in the \"x\" command.\n\n\
2511 With no argument, display all currently requested auto-display expressions.\n\
2512 Use \"undisplay\" to cancel display requests previously made."));
2514 add_cmd ("display", class_vars, enable_display_command, _("\
2515 Enable some expressions to be displayed when program stops.\n\
2516 Arguments are the code numbers of the expressions to resume displaying.\n\
2517 No argument means enable all automatic-display expressions.\n\
2518 Do \"info display\" to see current list of code numbers."), &enablelist);
2520 add_cmd ("display", class_vars, disable_display_command, _("\
2521 Disable some expressions to be displayed when program stops.\n\
2522 Arguments are the code numbers of the expressions to stop displaying.\n\
2523 No argument means disable all automatic-display expressions.\n\
2524 Do \"info display\" to see current list of code numbers."), &disablelist);
2526 add_cmd ("display", class_vars, undisplay_command, _("\
2527 Cancel some expressions to be displayed when program stops.\n\
2528 Arguments are the code numbers of the expressions to stop displaying.\n\
2529 No argument means cancel all automatic-display expressions.\n\
2530 Do \"info display\" to see current list of code numbers."), &deletelist);
2532 add_com ("printf", class_vars, printf_command, _("\
2533 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2534 This is useful for formatted output in user-defined commands."));
2536 add_com ("output", class_vars, output_command, _("\
2537 Like \"print\" but don't put in value history and don't print newline.\n\
2538 This is useful in user-defined commands."));
2540 add_prefix_cmd ("set", class_vars, set_command, _("\
2541 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2542 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2543 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2544 with $), a register (a few standard names starting with $), or an actual\n\
2545 variable in the program being debugged. EXP is any valid expression.\n\
2546 Use \"set variable\" for variables with names identical to set subcommands.\n\
2548 With a subcommand, this command modifies parts of the gdb environment.\n\
2549 You can see these environment settings with the \"show\" command."),
2550 &setlist, "set ", 1, &cmdlist);
2552 add_com ("assign", class_vars, set_command, _("\
2553 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2554 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2555 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2556 with $), a register (a few standard names starting with $), or an actual\n\
2557 variable in the program being debugged. EXP is any valid expression.\n\
2558 Use \"set variable\" for variables with names identical to set subcommands.\n\
2559 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2560 You can see these environment settings with the \"show\" command."));
2562 /* "call" is the same as "set", but handy for dbx users to call fns. */
2563 c = add_com ("call", class_vars, call_command, _("\
2564 Call a function in the program.\n\
2565 The argument is the function name and arguments, in the notation of the\n\
2566 current working language. The result is printed and saved in the value\n\
2567 history, if it is not void."));
2568 set_cmd_completer (c, expression_completer);
2570 add_cmd ("variable", class_vars, set_command, _("\
2571 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2572 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2573 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2574 with $), a register (a few standard names starting with $), or an actual\n\
2575 variable in the program being debugged. EXP is any valid expression.\n\
2576 This may usually be abbreviated to simply \"set\"."),
2579 c = add_com ("print", class_vars, print_command, _("\
2580 Print value of expression EXP.\n\
2581 Variables accessible are those of the lexical environment of the selected\n\
2582 stack frame, plus all those whose scope is global or an entire file.\n\
2584 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2585 $$NUM refers to NUM'th value back from the last one.\n\
2586 Names starting with $ refer to registers (with the values they would have\n\
2587 if the program were to return to the stack frame now selected, restoring\n\
2588 all registers saved by frames farther in) or else to debugger\n\
2589 \"convenience\" variables (any such name not a known register).\n\
2590 Use assignment expressions to give values to convenience variables.\n\
2592 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2593 @ is a binary operator for treating consecutive data objects\n\
2594 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2595 element is FOO, whose second element is stored in the space following\n\
2596 where FOO is stored, etc. FOO must be an expression whose value\n\
2597 resides in memory.\n\
2599 EXP may be preceded with /FMT, where FMT is a format letter\n\
2600 but no count or size letter (see \"x\" command)."));
2601 set_cmd_completer (c, expression_completer);
2602 add_com_alias ("p", "print", class_vars, 1);
2604 c = add_com ("inspect", class_vars, inspect_command, _("\
2605 Same as \"print\" command, except that if you are running in the epoch\n\
2606 environment, the value is printed in its own window."));
2607 set_cmd_completer (c, expression_completer);
2609 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2610 &max_symbolic_offset, _("\
2611 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2612 Show the largest offset that will be printed in <symbol+1234> form."), NULL,
2614 show_max_symbolic_offset,
2615 &setprintlist, &showprintlist);
2616 add_setshow_boolean_cmd ("symbol-filename", no_class,
2617 &print_symbol_filename, _("\
2618 Set printing of source filename and line number with <symbol>."), _("\
2619 Show printing of source filename and line number with <symbol>."), NULL,
2621 show_print_symbol_filename,
2622 &setprintlist, &showprintlist);
2624 add_com ("eval", no_class, eval_command, _("\
2625 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2626 a command line, and call it."));