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"
56 #include "tui/tui.h" /* For tui_active et al. */
65 /* True if the value should be printed raw -- that is, bypassing
66 python-based formatters. */
70 /* Last specified output format. */
72 static char last_format = 0;
74 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
76 static char last_size = 'w';
78 /* Default address to examine next, and associated architecture. */
80 static struct gdbarch *next_gdbarch;
81 static CORE_ADDR next_address;
83 /* Number of delay instructions following current disassembled insn. */
85 static int branch_delay_insns;
87 /* Last address examined. */
89 static CORE_ADDR last_examine_address;
91 /* Contents of last address examined.
92 This is not valid past the end of the `x' command! */
94 static struct value *last_examine_value;
96 /* Largest offset between a symbolic value and an address, that will be
97 printed as `0x1234 <symbol+offset>'. */
99 static unsigned int max_symbolic_offset = UINT_MAX;
101 show_max_symbolic_offset (struct ui_file *file, int from_tty,
102 struct cmd_list_element *c, const char *value)
104 fprintf_filtered (file,
105 _("The largest offset that will be "
106 "printed in <symbol+1234> form is %s.\n"),
110 /* Append the source filename and linenumber of the symbol when
111 printing a symbolic value as `<symbol at filename:linenum>' if set. */
112 static int print_symbol_filename = 0;
114 show_print_symbol_filename (struct ui_file *file, int from_tty,
115 struct cmd_list_element *c, const char *value)
117 fprintf_filtered (file, _("Printing of source filename and "
118 "line number with <symbol> is %s.\n"),
122 /* Number of auto-display expression currently being displayed.
123 So that we can disable it if we get a signal within it.
124 -1 when not doing one. */
126 static int current_display_number;
130 /* Chain link to next auto-display item. */
131 struct display *next;
133 /* The expression as the user typed it. */
136 /* Expression to be evaluated and displayed. */
137 struct expression *exp;
139 /* Item number of this auto-display item. */
142 /* Display format specified. */
143 struct format_data format;
145 /* Program space associated with `block'. */
146 struct program_space *pspace;
148 /* Innermost block required by this expression when evaluated. */
149 const struct block *block;
151 /* Status of this display (enabled or disabled). */
155 /* Chain of expressions whose values should be displayed
156 automatically each time the program stops. */
158 static struct display *display_chain;
160 static int display_number;
162 /* Walk the following statement or block through all displays.
163 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
166 #define ALL_DISPLAYS(B) \
167 for (B = display_chain; B; B = B->next)
169 #define ALL_DISPLAYS_SAFE(B,TMP) \
170 for (B = display_chain; \
171 B ? (TMP = B->next, 1): 0; \
174 /* Prototypes for exported functions. */
176 void _initialize_printcmd (void);
178 /* Prototypes for local functions. */
180 static void do_one_display (struct display *);
183 /* Decode a format specification. *STRING_PTR should point to it.
184 OFORMAT and OSIZE are used as defaults for the format and size
185 if none are given in the format specification.
186 If OSIZE is zero, then the size field of the returned value
187 should be set only if a size is explicitly specified by the
189 The structure returned describes all the data
190 found in the specification. In addition, *STRING_PTR is advanced
191 past the specification and past all whitespace following it. */
193 static struct format_data
194 decode_format (const char **string_ptr, int oformat, int osize)
196 struct format_data val;
197 const char *p = *string_ptr;
204 if (*p >= '0' && *p <= '9')
205 val.count = atoi (p);
206 while (*p >= '0' && *p <= '9')
209 /* Now process size or format letters that follow. */
213 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
220 else if (*p >= 'a' && *p <= 'z')
226 while (*p == ' ' || *p == '\t')
230 /* Set defaults for format and size if not specified. */
231 if (val.format == '?')
235 /* Neither has been specified. */
236 val.format = oformat;
240 /* If a size is specified, any format makes a reasonable
241 default except 'i'. */
242 val.format = oformat == 'i' ? 'x' : oformat;
244 else if (val.size == '?')
248 /* Pick the appropriate size for an address. This is deferred
249 until do_examine when we know the actual architecture to use.
250 A special size value of 'a' is used to indicate this case. */
251 val.size = osize ? 'a' : osize;
254 /* Floating point has to be word or giantword. */
255 if (osize == 'w' || osize == 'g')
258 /* Default it to giantword if the last used size is not
260 val.size = osize ? 'g' : osize;
263 /* Characters default to one byte. */
264 val.size = osize ? 'b' : osize;
267 /* Display strings with byte size chars unless explicitly
273 /* The default is the size most recently specified. */
280 /* Print value VAL on stream according to OPTIONS.
281 Do not end with a newline.
282 SIZE is the letter for the size of datum being printed.
283 This is used to pad hex numbers so they line up. SIZE is 0
284 for print / output and set for examine. */
287 print_formatted (struct value *val, int size,
288 const struct value_print_options *options,
289 struct ui_file *stream)
291 struct type *type = check_typedef (value_type (val));
292 int len = TYPE_LENGTH (type);
294 if (VALUE_LVAL (val) == lval_memory)
295 next_address = value_address (val) + len;
299 switch (options->format)
303 struct type *elttype = value_type (val);
305 next_address = (value_address (val)
306 + val_print_string (elttype, NULL,
307 value_address (val), -1,
308 stream, options) * len);
313 /* We often wrap here if there are long symbolic names. */
315 next_address = (value_address (val)
316 + gdb_print_insn (get_type_arch (type),
317 value_address (val), stream,
318 &branch_delay_insns));
323 if (options->format == 0 || options->format == 's'
324 || TYPE_CODE (type) == TYPE_CODE_REF
325 || TYPE_CODE (type) == TYPE_CODE_ARRAY
326 || TYPE_CODE (type) == TYPE_CODE_STRING
327 || TYPE_CODE (type) == TYPE_CODE_STRUCT
328 || TYPE_CODE (type) == TYPE_CODE_UNION
329 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
330 value_print (val, stream, options);
332 /* User specified format, so don't look to the type to tell us
334 val_print_scalar_formatted (type,
335 value_contents_for_printing (val),
336 value_embedded_offset (val),
338 options, size, stream);
341 /* Return builtin floating point type of same length as TYPE.
342 If no such type is found, return TYPE itself. */
344 float_type_from_length (struct type *type)
346 struct gdbarch *gdbarch = get_type_arch (type);
347 const struct builtin_type *builtin = builtin_type (gdbarch);
349 if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_float))
350 type = builtin->builtin_float;
351 else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_double))
352 type = builtin->builtin_double;
353 else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_long_double))
354 type = builtin->builtin_long_double;
359 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
360 according to OPTIONS and SIZE on STREAM. Formats s and i are not
361 supported at this level. */
364 print_scalar_formatted (const void *valaddr, struct type *type,
365 const struct value_print_options *options,
366 int size, struct ui_file *stream)
368 struct gdbarch *gdbarch = get_type_arch (type);
369 LONGEST val_long = 0;
370 unsigned int len = TYPE_LENGTH (type);
371 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
373 /* String printing should go through val_print_scalar_formatted. */
374 gdb_assert (options->format != 's');
376 if (len > sizeof(LONGEST) &&
377 (TYPE_CODE (type) == TYPE_CODE_INT
378 || TYPE_CODE (type) == TYPE_CODE_ENUM))
380 switch (options->format)
383 print_octal_chars (stream, valaddr, len, byte_order);
387 print_decimal_chars (stream, valaddr, len, byte_order);
390 print_binary_chars (stream, valaddr, len, byte_order);
393 print_hex_chars (stream, valaddr, len, byte_order);
396 print_char_chars (stream, type, valaddr, len, byte_order);
403 if (options->format != 'f')
404 val_long = unpack_long (type, valaddr);
406 /* If the value is a pointer, and pointers and addresses are not the
407 same, then at this point, the value's length (in target bytes) is
408 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
409 if (TYPE_CODE (type) == TYPE_CODE_PTR)
410 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT;
412 /* If we are printing it as unsigned, truncate it in case it is actually
413 a negative signed value (e.g. "print/u (short)-1" should print 65535
414 (if shorts are 16 bits) instead of 4294967295). */
415 if (options->format != 'd' || TYPE_UNSIGNED (type))
417 if (len < sizeof (LONGEST))
418 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
421 switch (options->format)
426 /* No size specified, like in print. Print varying # of digits. */
427 print_longest (stream, 'x', 1, val_long);
436 print_longest (stream, size, 1, val_long);
439 error (_("Undefined output size \"%c\"."), size);
444 print_longest (stream, 'd', 1, val_long);
448 print_longest (stream, 'u', 0, val_long);
453 print_longest (stream, 'o', 1, val_long);
455 fprintf_filtered (stream, "0");
460 CORE_ADDR addr = unpack_pointer (type, valaddr);
462 print_address (gdbarch, addr, stream);
468 struct value_print_options opts = *options;
471 if (TYPE_UNSIGNED (type))
472 type = builtin_type (gdbarch)->builtin_true_unsigned_char;
474 type = builtin_type (gdbarch)->builtin_true_char;
476 value_print (value_from_longest (type, val_long), stream, &opts);
481 type = float_type_from_length (type);
482 print_floating (valaddr, type, stream);
486 internal_error (__FILE__, __LINE__,
487 _("failed internal consistency check"));
490 /* Binary; 't' stands for "two". */
492 char bits[8 * (sizeof val_long) + 1];
493 char buf[8 * (sizeof val_long) + 32];
498 width = 8 * (sizeof val_long);
515 error (_("Undefined output size \"%c\"."), size);
521 bits[width] = (val_long & 1) ? '1' : '0';
526 while (*cp && *cp == '0')
531 strncpy (buf, cp, sizeof (bits));
532 fputs_filtered (buf, stream);
537 error (_("Undefined output format \"%c\"."), options->format);
541 /* Specify default address for `x' command.
542 The `info lines' command uses this. */
545 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
547 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
549 next_gdbarch = gdbarch;
552 /* Make address available to the user as $_. */
553 set_internalvar (lookup_internalvar ("_"),
554 value_from_pointer (ptr_type, addr));
557 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
558 after LEADIN. Print nothing if no symbolic name is found nearby.
559 Optionally also print source file and line number, if available.
560 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
561 or to interpret it as a possible C++ name and convert it back to source
562 form. However note that DO_DEMANGLE can be overridden by the specific
563 settings of the demangle and asm_demangle variables. Returns
564 non-zero if anything was printed; zero otherwise. */
567 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
568 struct ui_file *stream,
569 int do_demangle, char *leadin)
572 char *filename = NULL;
577 /* Throw away both name and filename. */
578 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
579 make_cleanup (free_current_contents, &filename);
581 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset,
582 &filename, &line, &unmapped))
584 do_cleanups (cleanup_chain);
588 fputs_filtered (leadin, stream);
590 fputs_filtered ("<*", stream);
592 fputs_filtered ("<", stream);
593 fputs_filtered (name, stream);
595 fprintf_filtered (stream, "+%u", (unsigned int) offset);
597 /* Append source filename and line number if desired. Give specific
598 line # of this addr, if we have it; else line # of the nearest symbol. */
599 if (print_symbol_filename && filename != NULL)
602 fprintf_filtered (stream, " at %s:%d", filename, line);
604 fprintf_filtered (stream, " in %s", filename);
607 fputs_filtered ("*>", stream);
609 fputs_filtered (">", stream);
611 do_cleanups (cleanup_chain);
615 /* Given an address ADDR return all the elements needed to print the
616 address in a symbolic form. NAME can be mangled or not depending
617 on DO_DEMANGLE (and also on the asm_demangle global variable,
618 manipulated via ''set print asm-demangle''). Return 0 in case of
619 success, when all the info in the OUT paramters is valid. Return 1
622 build_address_symbolic (struct gdbarch *gdbarch,
623 CORE_ADDR addr, /* IN */
624 int do_demangle, /* IN */
625 char **name, /* OUT */
626 int *offset, /* OUT */
627 char **filename, /* OUT */
629 int *unmapped) /* OUT */
631 struct minimal_symbol *msymbol;
632 struct symbol *symbol;
633 CORE_ADDR name_location = 0;
634 struct obj_section *section = NULL;
635 const char *name_temp = "";
637 /* Let's say it is mapped (not unmapped). */
640 /* Determine if the address is in an overlay, and whether it is
642 if (overlay_debugging)
644 section = find_pc_overlay (addr);
645 if (pc_in_unmapped_range (addr, section))
648 addr = overlay_mapped_address (addr, section);
652 /* First try to find the address in the symbol table, then
653 in the minsyms. Take the closest one. */
655 /* This is defective in the sense that it only finds text symbols. So
656 really this is kind of pointless--we should make sure that the
657 minimal symbols have everything we need (by changing that we could
658 save some memory, but for many debug format--ELF/DWARF or
659 anything/stabs--it would be inconvenient to eliminate those minimal
661 msymbol = lookup_minimal_symbol_by_pc_section (addr, section).minsym;
662 symbol = find_pc_sect_function (addr, section);
666 /* If this is a function (i.e. a code address), strip out any
667 non-address bits. For instance, display a pointer to the
668 first instruction of a Thumb function as <function>; the
669 second instruction will be <function+2>, even though the
670 pointer is <function+3>. This matches the ISA behavior. */
671 addr = gdbarch_addr_bits_remove (gdbarch, addr);
673 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
674 if (do_demangle || asm_demangle)
675 name_temp = SYMBOL_PRINT_NAME (symbol);
677 name_temp = SYMBOL_LINKAGE_NAME (symbol);
681 && MSYMBOL_HAS_SIZE (msymbol)
682 && MSYMBOL_SIZE (msymbol) == 0
683 && MSYMBOL_TYPE (msymbol) != mst_text
684 && MSYMBOL_TYPE (msymbol) != mst_text_gnu_ifunc
685 && MSYMBOL_TYPE (msymbol) != mst_file_text)
690 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
692 /* The msymbol is closer to the address than the symbol;
693 use the msymbol instead. */
695 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
696 if (do_demangle || asm_demangle)
697 name_temp = SYMBOL_PRINT_NAME (msymbol);
699 name_temp = SYMBOL_LINKAGE_NAME (msymbol);
702 if (symbol == NULL && msymbol == NULL)
705 /* If the nearest symbol is too far away, don't print anything symbolic. */
707 /* For when CORE_ADDR is larger than unsigned int, we do math in
708 CORE_ADDR. But when we detect unsigned wraparound in the
709 CORE_ADDR math, we ignore this test and print the offset,
710 because addr+max_symbolic_offset has wrapped through the end
711 of the address space back to the beginning, giving bogus comparison. */
712 if (addr > name_location + max_symbolic_offset
713 && name_location + max_symbolic_offset > name_location)
716 *offset = addr - name_location;
718 *name = xstrdup (name_temp);
720 if (print_symbol_filename)
722 struct symtab_and_line sal;
724 sal = find_pc_sect_line (addr, section, 0);
728 *filename = xstrdup (symtab_to_filename_for_display (sal.symtab));
736 /* Print address ADDR symbolically on STREAM.
737 First print it as a number. Then perhaps print
738 <SYMBOL + OFFSET> after the number. */
741 print_address (struct gdbarch *gdbarch,
742 CORE_ADDR addr, struct ui_file *stream)
744 fputs_filtered (paddress (gdbarch, addr), stream);
745 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " ");
748 /* Return a prefix for instruction address:
749 "=> " for current instruction, else " ". */
752 pc_prefix (CORE_ADDR addr)
754 if (has_stack_frames ())
756 struct frame_info *frame;
759 frame = get_selected_frame (NULL);
760 if (get_frame_pc_if_available (frame, &pc) && pc == addr)
766 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
767 controls whether to print the symbolic name "raw" or demangled.
768 Return non-zero if anything was printed; zero otherwise. */
771 print_address_demangle (const struct value_print_options *opts,
772 struct gdbarch *gdbarch, CORE_ADDR addr,
773 struct ui_file *stream, int do_demangle)
775 if (opts->addressprint)
777 fputs_filtered (paddress (gdbarch, addr), stream);
778 print_address_symbolic (gdbarch, addr, stream, do_demangle, " ");
782 return print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
788 /* Examine data at address ADDR in format FMT.
789 Fetch it from memory and print on gdb_stdout. */
792 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr)
797 struct type *val_type = NULL;
800 struct value_print_options opts;
805 next_gdbarch = gdbarch;
808 /* Instruction format implies fetch single bytes
809 regardless of the specified size.
810 The case of strings is handled in decode_format, only explicit
811 size operator are not changed to 'b'. */
817 /* Pick the appropriate size for an address. */
818 if (gdbarch_ptr_bit (next_gdbarch) == 64)
820 else if (gdbarch_ptr_bit (next_gdbarch) == 32)
822 else if (gdbarch_ptr_bit (next_gdbarch) == 16)
825 /* Bad value for gdbarch_ptr_bit. */
826 internal_error (__FILE__, __LINE__,
827 _("failed internal consistency check"));
831 val_type = builtin_type (next_gdbarch)->builtin_int8;
832 else if (size == 'h')
833 val_type = builtin_type (next_gdbarch)->builtin_int16;
834 else if (size == 'w')
835 val_type = builtin_type (next_gdbarch)->builtin_int32;
836 else if (size == 'g')
837 val_type = builtin_type (next_gdbarch)->builtin_int64;
841 struct type *char_type = NULL;
843 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
844 if type is not found. */
846 char_type = builtin_type (next_gdbarch)->builtin_char16;
847 else if (size == 'w')
848 char_type = builtin_type (next_gdbarch)->builtin_char32;
850 val_type = char_type;
853 if (size != '\0' && size != 'b')
854 warning (_("Unable to display strings with "
855 "size '%c', using 'b' instead."), size);
857 val_type = builtin_type (next_gdbarch)->builtin_int8;
866 if (format == 's' || format == 'i')
869 get_formatted_print_options (&opts, format);
871 /* Print as many objects as specified in COUNT, at most maxelts per line,
872 with the address of the next one at the start of each line. */
878 fputs_filtered (pc_prefix (next_address), gdb_stdout);
879 print_address (next_gdbarch, next_address, gdb_stdout);
880 printf_filtered (":");
885 printf_filtered ("\t");
886 /* Note that print_formatted sets next_address for the next
888 last_examine_address = next_address;
890 if (last_examine_value)
891 value_free (last_examine_value);
893 /* The value to be displayed is not fetched greedily.
894 Instead, to avoid the possibility of a fetched value not
895 being used, its retrieval is delayed until the print code
896 uses it. When examining an instruction stream, the
897 disassembler will perform its own memory fetch using just
898 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
899 the disassembler be modified so that LAST_EXAMINE_VALUE
900 is left with the byte sequence from the last complete
901 instruction fetched from memory? */
902 last_examine_value = value_at_lazy (val_type, next_address);
904 if (last_examine_value)
905 release_value (last_examine_value);
907 print_formatted (last_examine_value, size, &opts, gdb_stdout);
909 /* Display any branch delay slots following the final insn. */
910 if (format == 'i' && count == 1)
911 count += branch_delay_insns;
913 printf_filtered ("\n");
914 gdb_flush (gdb_stdout);
919 validate_format (struct format_data fmt, char *cmdname)
922 error (_("Size letters are meaningless in \"%s\" command."), cmdname);
924 error (_("Item count other than 1 is meaningless in \"%s\" command."),
926 if (fmt.format == 'i')
927 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
928 fmt.format, cmdname);
931 /* Evaluate string EXP as an expression in the current language and
932 print the resulting value. EXP may contain a format specifier as the
933 first argument ("/x myvar" for example, to print myvar in hex). */
936 print_command_1 (const char *exp, int voidprint)
938 struct expression *expr;
939 struct cleanup *old_chain = 0;
942 struct format_data fmt;
945 if (exp && *exp == '/')
948 fmt = decode_format (&exp, last_format, 0);
949 validate_format (fmt, "print");
950 last_format = format = fmt.format;
962 expr = parse_expression (exp);
963 old_chain = make_cleanup (free_current_contents, &expr);
965 val = evaluate_expression (expr);
968 val = access_value_history (0);
970 if (voidprint || (val && value_type (val) &&
971 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
973 struct value_print_options opts;
974 int histindex = record_latest_value (val);
977 annotate_value_history_begin (histindex, value_type (val));
979 annotate_value_begin (value_type (val));
982 printf_filtered ("$%d = ", histindex);
985 annotate_value_history_value ();
987 get_formatted_print_options (&opts, format);
990 print_formatted (val, fmt.size, &opts, gdb_stdout);
991 printf_filtered ("\n");
994 annotate_value_history_end ();
996 annotate_value_end ();
1000 do_cleanups (old_chain);
1004 print_command (char *exp, int from_tty)
1006 print_command_1 (exp, 1);
1009 /* Same as print, except it doesn't print void results. */
1011 call_command (char *exp, int from_tty)
1013 print_command_1 (exp, 0);
1016 /* Implementation of the "output" command. */
1019 output_command (char *exp, int from_tty)
1021 output_command_const (exp, from_tty);
1024 /* Like output_command, but takes a const string as argument. */
1027 output_command_const (const char *exp, int from_tty)
1029 struct expression *expr;
1030 struct cleanup *old_chain;
1033 struct format_data fmt;
1034 struct value_print_options opts;
1039 if (exp && *exp == '/')
1042 fmt = decode_format (&exp, 0, 0);
1043 validate_format (fmt, "output");
1044 format = fmt.format;
1047 expr = parse_expression (exp);
1048 old_chain = make_cleanup (free_current_contents, &expr);
1050 val = evaluate_expression (expr);
1052 annotate_value_begin (value_type (val));
1054 get_formatted_print_options (&opts, format);
1056 print_formatted (val, fmt.size, &opts, gdb_stdout);
1058 annotate_value_end ();
1061 gdb_flush (gdb_stdout);
1063 do_cleanups (old_chain);
1067 set_command (char *exp, int from_tty)
1069 struct expression *expr = parse_expression (exp);
1070 struct cleanup *old_chain =
1071 make_cleanup (free_current_contents, &expr);
1073 if (expr->nelts >= 1)
1074 switch (expr->elts[0].opcode)
1076 case UNOP_PREINCREMENT:
1077 case UNOP_POSTINCREMENT:
1078 case UNOP_PREDECREMENT:
1079 case UNOP_POSTDECREMENT:
1081 case BINOP_ASSIGN_MODIFY:
1086 (_("Expression is not an assignment (and might have no effect)"));
1089 evaluate_expression (expr);
1090 do_cleanups (old_chain);
1094 sym_info (char *arg, int from_tty)
1096 struct minimal_symbol *msymbol;
1097 struct objfile *objfile;
1098 struct obj_section *osect;
1099 CORE_ADDR addr, sect_addr;
1101 unsigned int offset;
1104 error_no_arg (_("address"));
1106 addr = parse_and_eval_address (arg);
1107 ALL_OBJSECTIONS (objfile, osect)
1109 /* Only process each object file once, even if there's a separate
1111 if (objfile->separate_debug_objfile_backlink)
1114 sect_addr = overlay_mapped_address (addr, osect);
1116 if (obj_section_addr (osect) <= sect_addr
1117 && sect_addr < obj_section_endaddr (osect)
1119 = lookup_minimal_symbol_by_pc_section (sect_addr, osect).minsym))
1121 const char *obj_name, *mapped, *sec_name, *msym_name;
1123 struct cleanup *old_chain;
1126 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1127 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
1128 sec_name = osect->the_bfd_section->name;
1129 msym_name = SYMBOL_PRINT_NAME (msymbol);
1131 /* Don't print the offset if it is zero.
1132 We assume there's no need to handle i18n of "sym + offset". */
1134 loc_string = xstrprintf ("%s + %u", msym_name, offset);
1136 loc_string = xstrprintf ("%s", msym_name);
1138 /* Use a cleanup to free loc_string in case the user quits
1139 a pagination request inside printf_filtered. */
1140 old_chain = make_cleanup (xfree, loc_string);
1142 gdb_assert (osect->objfile && osect->objfile->name);
1143 obj_name = osect->objfile->name;
1145 if (MULTI_OBJFILE_P ())
1146 if (pc_in_unmapped_range (addr, osect))
1147 if (section_is_overlay (osect))
1148 printf_filtered (_("%s in load address range of "
1149 "%s overlay section %s of %s\n"),
1150 loc_string, mapped, sec_name, obj_name);
1152 printf_filtered (_("%s in load address range of "
1153 "section %s of %s\n"),
1154 loc_string, sec_name, obj_name);
1156 if (section_is_overlay (osect))
1157 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1158 loc_string, mapped, sec_name, obj_name);
1160 printf_filtered (_("%s in section %s of %s\n"),
1161 loc_string, sec_name, obj_name);
1163 if (pc_in_unmapped_range (addr, osect))
1164 if (section_is_overlay (osect))
1165 printf_filtered (_("%s in load address range of %s overlay "
1167 loc_string, mapped, sec_name);
1169 printf_filtered (_("%s in load address range of section %s\n"),
1170 loc_string, sec_name);
1172 if (section_is_overlay (osect))
1173 printf_filtered (_("%s in %s overlay section %s\n"),
1174 loc_string, mapped, sec_name);
1176 printf_filtered (_("%s in section %s\n"),
1177 loc_string, sec_name);
1179 do_cleanups (old_chain);
1183 printf_filtered (_("No symbol matches %s.\n"), arg);
1187 address_info (char *exp, int from_tty)
1189 struct gdbarch *gdbarch;
1192 struct minimal_symbol *msymbol;
1194 struct obj_section *section;
1195 CORE_ADDR load_addr, context_pc = 0;
1196 struct field_of_this_result is_a_field_of_this;
1199 error (_("Argument required."));
1201 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
1202 &is_a_field_of_this);
1205 if (is_a_field_of_this.type != NULL)
1207 printf_filtered ("Symbol \"");
1208 fprintf_symbol_filtered (gdb_stdout, exp,
1209 current_language->la_language, DMGL_ANSI);
1210 printf_filtered ("\" is a field of the local class variable ");
1211 if (current_language->la_language == language_objc)
1212 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1214 printf_filtered ("`this'\n");
1218 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1220 if (msymbol != NULL)
1222 struct objfile *objfile = msymbol_objfile (msymbol);
1224 gdbarch = get_objfile_arch (objfile);
1225 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1227 printf_filtered ("Symbol \"");
1228 fprintf_symbol_filtered (gdb_stdout, exp,
1229 current_language->la_language, DMGL_ANSI);
1230 printf_filtered ("\" is at ");
1231 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1232 printf_filtered (" in a file compiled without debugging");
1233 section = SYMBOL_OBJ_SECTION (objfile, msymbol);
1234 if (section_is_overlay (section))
1236 load_addr = overlay_unmapped_address (load_addr, section);
1237 printf_filtered (",\n -- loaded at ");
1238 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1239 printf_filtered (" in overlay section %s",
1240 section->the_bfd_section->name);
1242 printf_filtered (".\n");
1245 error (_("No symbol \"%s\" in current context."), exp);
1249 printf_filtered ("Symbol \"");
1250 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1251 current_language->la_language, DMGL_ANSI);
1252 printf_filtered ("\" is ");
1253 val = SYMBOL_VALUE (sym);
1254 section = SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym), sym);
1255 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1257 if (SYMBOL_COMPUTED_OPS (sym) != NULL)
1259 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
1261 printf_filtered (".\n");
1265 switch (SYMBOL_CLASS (sym))
1268 case LOC_CONST_BYTES:
1269 printf_filtered ("constant");
1273 printf_filtered ("a label at address ");
1274 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1275 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1276 if (section_is_overlay (section))
1278 load_addr = overlay_unmapped_address (load_addr, section);
1279 printf_filtered (",\n -- loaded at ");
1280 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1281 printf_filtered (" in overlay section %s",
1282 section->the_bfd_section->name);
1287 gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method"));
1290 /* GDBARCH is the architecture associated with the objfile the symbol
1291 is defined in; the target architecture may be different, and may
1292 provide additional registers. However, we do not know the target
1293 architecture at this point. We assume the objfile architecture
1294 will contain all the standard registers that occur in debug info
1296 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1298 if (SYMBOL_IS_ARGUMENT (sym))
1299 printf_filtered (_("an argument in register %s"),
1300 gdbarch_register_name (gdbarch, regno));
1302 printf_filtered (_("a variable in register %s"),
1303 gdbarch_register_name (gdbarch, regno));
1307 printf_filtered (_("static storage at address "));
1308 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1309 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1310 if (section_is_overlay (section))
1312 load_addr = overlay_unmapped_address (load_addr, section);
1313 printf_filtered (_(",\n -- loaded at "));
1314 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1315 printf_filtered (_(" in overlay section %s"),
1316 section->the_bfd_section->name);
1320 case LOC_REGPARM_ADDR:
1321 /* Note comment at LOC_REGISTER. */
1322 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1323 printf_filtered (_("address of an argument in register %s"),
1324 gdbarch_register_name (gdbarch, regno));
1328 printf_filtered (_("an argument at offset %ld"), val);
1332 printf_filtered (_("a local variable at frame offset %ld"), val);
1336 printf_filtered (_("a reference argument at offset %ld"), val);
1340 printf_filtered (_("a typedef"));
1344 printf_filtered (_("a function at address "));
1345 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1346 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1347 if (section_is_overlay (section))
1349 load_addr = overlay_unmapped_address (load_addr, section);
1350 printf_filtered (_(",\n -- loaded at "));
1351 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1352 printf_filtered (_(" in overlay section %s"),
1353 section->the_bfd_section->name);
1357 case LOC_UNRESOLVED:
1359 struct bound_minimal_symbol msym;
1361 msym = lookup_minimal_symbol_and_objfile (SYMBOL_LINKAGE_NAME (sym));
1362 if (msym.minsym == NULL)
1363 printf_filtered ("unresolved");
1366 section = SYMBOL_OBJ_SECTION (msym.objfile, msym.minsym);
1367 load_addr = SYMBOL_VALUE_ADDRESS (msym.minsym);
1370 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1371 printf_filtered (_("a thread-local variable at offset %s "
1372 "in the thread-local storage for `%s'"),
1373 paddress (gdbarch, load_addr),
1374 section->objfile->name);
1377 printf_filtered (_("static storage at address "));
1378 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1379 if (section_is_overlay (section))
1381 load_addr = overlay_unmapped_address (load_addr, section);
1382 printf_filtered (_(",\n -- loaded at "));
1383 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1384 printf_filtered (_(" in overlay section %s"),
1385 section->the_bfd_section->name);
1392 case LOC_OPTIMIZED_OUT:
1393 printf_filtered (_("optimized out"));
1397 printf_filtered (_("of unknown (botched) type"));
1400 printf_filtered (".\n");
1405 x_command (char *exp, int from_tty)
1407 struct expression *expr;
1408 struct format_data fmt;
1409 struct cleanup *old_chain;
1412 fmt.format = last_format ? last_format : 'x';
1413 fmt.size = last_size;
1417 if (exp && *exp == '/')
1419 const char *tmp = exp + 1;
1421 fmt = decode_format (&tmp, last_format, last_size);
1425 /* If we have an expression, evaluate it and use it as the address. */
1427 if (exp != 0 && *exp != 0)
1429 expr = parse_expression (exp);
1430 /* Cause expression not to be there any more if this command is
1431 repeated with Newline. But don't clobber a user-defined
1432 command's definition. */
1435 old_chain = make_cleanup (free_current_contents, &expr);
1436 val = evaluate_expression (expr);
1437 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1438 val = coerce_ref (val);
1439 /* In rvalue contexts, such as this, functions are coerced into
1440 pointers to functions. This makes "x/i main" work. */
1441 if (/* last_format == 'i' && */
1442 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1443 && VALUE_LVAL (val) == lval_memory)
1444 next_address = value_address (val);
1446 next_address = value_as_address (val);
1448 next_gdbarch = expr->gdbarch;
1449 do_cleanups (old_chain);
1453 error_no_arg (_("starting display address"));
1455 do_examine (fmt, next_gdbarch, next_address);
1457 /* If the examine succeeds, we remember its size and format for next
1458 time. Set last_size to 'b' for strings. */
1459 if (fmt.format == 's')
1462 last_size = fmt.size;
1463 last_format = fmt.format;
1465 /* Set a couple of internal variables if appropriate. */
1466 if (last_examine_value)
1468 /* Make last address examined available to the user as $_. Use
1469 the correct pointer type. */
1470 struct type *pointer_type
1471 = lookup_pointer_type (value_type (last_examine_value));
1472 set_internalvar (lookup_internalvar ("_"),
1473 value_from_pointer (pointer_type,
1474 last_examine_address));
1476 /* Make contents of last address examined available to the user
1477 as $__. If the last value has not been fetched from memory
1478 then don't fetch it now; instead mark it by voiding the $__
1480 if (value_lazy (last_examine_value))
1481 clear_internalvar (lookup_internalvar ("__"));
1483 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1488 /* Add an expression to the auto-display chain.
1489 Specify the expression. */
1492 display_command (char *arg, int from_tty)
1494 struct format_data fmt;
1495 struct expression *expr;
1496 struct display *new;
1498 const char *exp = arg;
1501 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1503 if (tui_active && exp != NULL && *exp == '$')
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 /* Subroutine of ui_printf to simplify it.
1999 Print VALUE to STREAM using FORMAT.
2000 VALUE is a C-style string on the target. */
2003 printf_c_string (struct ui_file *stream, const char *format,
2004 struct value *value)
2010 tem = value_as_address (value);
2012 /* This is a %s argument. Find the length of the string. */
2018 read_memory (tem + j, &c, 1);
2023 /* Copy the string contents into a string inside GDB. */
2024 str = (gdb_byte *) alloca (j + 1);
2026 read_memory (tem, str, j);
2029 fprintf_filtered (stream, format, (char *) str);
2032 /* Subroutine of ui_printf to simplify it.
2033 Print VALUE to STREAM using FORMAT.
2034 VALUE is a wide C-style string on the target. */
2037 printf_wide_c_string (struct ui_file *stream, const char *format,
2038 struct value *value)
2043 struct gdbarch *gdbarch = get_type_arch (value_type (value));
2044 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2045 struct type *wctype = lookup_typename (current_language, gdbarch,
2046 "wchar_t", NULL, 0);
2047 int wcwidth = TYPE_LENGTH (wctype);
2048 gdb_byte *buf = alloca (wcwidth);
2049 struct obstack output;
2050 struct cleanup *inner_cleanup;
2052 tem = value_as_address (value);
2054 /* This is a %s argument. Find the length of the string. */
2055 for (j = 0;; j += wcwidth)
2058 read_memory (tem + j, buf, wcwidth);
2059 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
2063 /* Copy the string contents into a string inside GDB. */
2064 str = (gdb_byte *) alloca (j + wcwidth);
2066 read_memory (tem, str, j);
2067 memset (&str[j], 0, wcwidth);
2069 obstack_init (&output);
2070 inner_cleanup = make_cleanup_obstack_free (&output);
2072 convert_between_encodings (target_wide_charset (gdbarch),
2075 &output, translit_char);
2076 obstack_grow_str0 (&output, "");
2078 fprintf_filtered (stream, format, obstack_base (&output));
2079 do_cleanups (inner_cleanup);
2082 /* Subroutine of ui_printf to simplify it.
2083 Print VALUE, a decimal floating point value, to STREAM using FORMAT. */
2086 printf_decfloat (struct ui_file *stream, const char *format,
2087 struct value *value)
2089 const gdb_byte *param_ptr = value_contents (value);
2091 #if defined (PRINTF_HAS_DECFLOAT)
2092 /* If we have native support for Decimal floating
2093 printing, handle it here. */
2094 fprintf_filtered (stream, format, param_ptr);
2096 /* As a workaround until vasprintf has native support for DFP
2097 we convert the DFP values to string and print them using
2098 the %s format specifier. */
2101 /* Parameter data. */
2102 struct type *param_type = value_type (value);
2103 struct gdbarch *gdbarch = get_type_arch (param_type);
2104 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2106 /* DFP output data. */
2107 struct value *dfp_value = NULL;
2111 struct type *dfp_type = NULL;
2112 char decstr[MAX_DECIMAL_STRING];
2114 /* Points to the end of the string so that we can go back
2115 and check for DFP length modifiers. */
2116 p = format + strlen (format);
2118 /* Look for the float/double format specifier. */
2119 while (*p != 'f' && *p != 'e' && *p != 'E'
2120 && *p != 'g' && *p != 'G')
2123 /* Search for the '%' char and extract the size and type of
2124 the output decimal value based on its modifiers
2125 (%Hf, %Df, %DDf). */
2131 dfp_type = builtin_type (gdbarch)->builtin_decfloat;
2133 else if (*p == 'D' && *(p - 1) == 'D')
2136 dfp_type = builtin_type (gdbarch)->builtin_declong;
2142 dfp_type = builtin_type (gdbarch)->builtin_decdouble;
2146 /* Conversion between different DFP types. */
2147 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2148 decimal_convert (param_ptr, TYPE_LENGTH (param_type),
2149 byte_order, dec, dfp_len, byte_order);
2151 /* If this is a non-trivial conversion, just output 0.
2152 A correct converted value can be displayed by explicitly
2153 casting to a DFP type. */
2154 decimal_from_string (dec, dfp_len, byte_order, "0");
2156 dfp_value = value_from_decfloat (dfp_type, dec);
2158 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2160 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
2162 /* Print the DFP value. */
2163 fprintf_filtered (stream, "%s", decstr);
2167 /* Subroutine of ui_printf to simplify it.
2168 Print VALUE, a target pointer, to STREAM using FORMAT. */
2171 printf_pointer (struct ui_file *stream, const char *format,
2172 struct value *value)
2174 /* We avoid the host's %p because pointers are too
2175 likely to be the wrong size. The only interesting
2176 modifier for %p is a width; extract that, and then
2177 handle %p as glibc would: %#x or a literal "(nil)". */
2181 #ifdef PRINTF_HAS_LONG_LONG
2182 long long val = value_as_long (value);
2184 long val = value_as_long (value);
2187 fmt = alloca (strlen (format) + 5);
2189 /* Copy up to the leading %. */
2194 int is_percent = (*p == '%');
2209 /* Copy any width. */
2210 while (*p >= '0' && *p < '9')
2213 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2216 #ifdef PRINTF_HAS_LONG_LONG
2222 fprintf_filtered (stream, fmt, val);
2228 fprintf_filtered (stream, fmt, "(nil)");
2232 /* printf "printf format string" ARG to STREAM. */
2235 ui_printf (const char *arg, struct ui_file *stream)
2237 struct format_piece *fpieces;
2238 const char *s = arg;
2239 struct value **val_args;
2240 int allocated_args = 20;
2241 struct cleanup *old_cleanups;
2243 val_args = xmalloc (allocated_args * sizeof (struct value *));
2244 old_cleanups = make_cleanup (free_current_contents, &val_args);
2247 error_no_arg (_("format-control string and values to print"));
2249 s = skip_spaces_const (s);
2251 /* A format string should follow, enveloped in double quotes. */
2253 error (_("Bad format string, missing '\"'."));
2255 fpieces = parse_format_string (&s);
2257 make_cleanup (free_format_pieces_cleanup, &fpieces);
2260 error (_("Bad format string, non-terminated '\"'."));
2262 s = skip_spaces_const (s);
2264 if (*s != ',' && *s != 0)
2265 error (_("Invalid argument syntax"));
2269 s = skip_spaces_const (s);
2275 char *current_substring;
2278 for (fr = 0; fpieces[fr].string != NULL; fr++)
2279 if (fpieces[fr].argclass != literal_piece)
2282 /* Now, parse all arguments and evaluate them.
2283 Store the VALUEs in VAL_ARGS. */
2289 if (nargs == allocated_args)
2290 val_args = (struct value **) xrealloc ((char *) val_args,
2291 (allocated_args *= 2)
2292 * sizeof (struct value *));
2294 val_args[nargs] = parse_to_comma_and_eval (&s1);
2302 if (nargs != nargs_wanted)
2303 error (_("Wrong number of arguments for specified format-string"));
2305 /* Now actually print them. */
2307 for (fr = 0; fpieces[fr].string != NULL; fr++)
2309 current_substring = fpieces[fr].string;
2310 switch (fpieces[fr].argclass)
2313 printf_c_string (stream, current_substring, val_args[i]);
2315 case wide_string_arg:
2316 printf_wide_c_string (stream, current_substring, val_args[i]);
2320 struct gdbarch *gdbarch
2321 = get_type_arch (value_type (val_args[i]));
2322 struct type *wctype = lookup_typename (current_language, gdbarch,
2323 "wchar_t", NULL, 0);
2324 struct type *valtype;
2325 struct obstack output;
2326 struct cleanup *inner_cleanup;
2327 const gdb_byte *bytes;
2329 valtype = value_type (val_args[i]);
2330 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2331 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2332 error (_("expected wchar_t argument for %%lc"));
2334 bytes = value_contents (val_args[i]);
2336 obstack_init (&output);
2337 inner_cleanup = make_cleanup_obstack_free (&output);
2339 convert_between_encodings (target_wide_charset (gdbarch),
2341 bytes, TYPE_LENGTH (valtype),
2342 TYPE_LENGTH (valtype),
2343 &output, translit_char);
2344 obstack_grow_str0 (&output, "");
2346 fprintf_filtered (stream, current_substring,
2347 obstack_base (&output));
2348 do_cleanups (inner_cleanup);
2353 struct type *type = value_type (val_args[i]);
2357 /* If format string wants a float, unchecked-convert the value
2358 to floating point of the same size. */
2359 type = float_type_from_length (type);
2360 val = unpack_double (type, value_contents (val_args[i]), &inv);
2362 error (_("Invalid floating value found in program."));
2364 fprintf_filtered (stream, current_substring, (double) val);
2367 case long_double_arg:
2368 #ifdef HAVE_LONG_DOUBLE
2370 struct type *type = value_type (val_args[i]);
2374 /* If format string wants a float, unchecked-convert the value
2375 to floating point of the same size. */
2376 type = float_type_from_length (type);
2377 val = unpack_double (type, value_contents (val_args[i]), &inv);
2379 error (_("Invalid floating value found in program."));
2381 fprintf_filtered (stream, current_substring,
2386 error (_("long double not supported in printf"));
2389 #ifdef PRINTF_HAS_LONG_LONG
2391 long long val = value_as_long (val_args[i]);
2393 fprintf_filtered (stream, current_substring, val);
2397 error (_("long long not supported in printf"));
2401 int val = value_as_long (val_args[i]);
2403 fprintf_filtered (stream, current_substring, val);
2408 long val = value_as_long (val_args[i]);
2410 fprintf_filtered (stream, current_substring, val);
2413 /* Handles decimal floating values. */
2415 printf_decfloat (stream, current_substring, val_args[i]);
2418 printf_pointer (stream, current_substring, val_args[i]);
2421 /* Print a portion of the format string that has no
2422 directives. Note that this will not include any
2423 ordinary %-specs, but it might include "%%". That is
2424 why we use printf_filtered and not puts_filtered here.
2425 Also, we pass a dummy argument because some platforms
2426 have modified GCC to include -Wformat-security by
2427 default, which will warn here if there is no
2429 fprintf_filtered (stream, current_substring, 0);
2432 internal_error (__FILE__, __LINE__,
2433 _("failed internal consistency check"));
2435 /* Maybe advance to the next argument. */
2436 if (fpieces[fr].argclass != literal_piece)
2440 do_cleanups (old_cleanups);
2443 /* Implement the "printf" command. */
2446 printf_command (char *arg, int from_tty)
2448 ui_printf (arg, gdb_stdout);
2451 /* Implement the "eval" command. */
2454 eval_command (char *arg, int from_tty)
2456 struct ui_file *ui_out = mem_fileopen ();
2457 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out);
2460 ui_printf (arg, ui_out);
2462 expanded = ui_file_xstrdup (ui_out, NULL);
2463 make_cleanup (xfree, expanded);
2465 execute_command (expanded, from_tty);
2467 do_cleanups (cleanups);
2471 _initialize_printcmd (void)
2473 struct cmd_list_element *c;
2475 current_display_number = -1;
2477 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2479 add_info ("address", address_info,
2480 _("Describe where symbol SYM is stored."));
2482 add_info ("symbol", sym_info, _("\
2483 Describe what symbol is at location ADDR.\n\
2484 Only for symbols with fixed locations (global or static scope)."));
2486 add_com ("x", class_vars, x_command, _("\
2487 Examine memory: x/FMT ADDRESS.\n\
2488 ADDRESS is an expression for the memory address to examine.\n\
2489 FMT is a repeat count followed by a format letter and a size letter.\n\
2490 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2491 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2492 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2493 The specified number of objects of the specified size are printed\n\
2494 according to the format.\n\n\
2495 Defaults for format and size letters are those previously used.\n\
2496 Default count is 1. Default address is following last thing printed\n\
2497 with this command or \"print\"."));
2500 add_com ("whereis", class_vars, whereis_command,
2501 _("Print line number and file of definition of variable."));
2504 add_info ("display", display_info, _("\
2505 Expressions to display when program stops, with code numbers."));
2507 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2508 Cancel some expressions to be displayed when program stops.\n\
2509 Arguments are the code numbers of the expressions to stop displaying.\n\
2510 No argument means cancel all automatic-display expressions.\n\
2511 \"delete display\" has the same effect as this command.\n\
2512 Do \"info display\" to see current list of code numbers."),
2515 add_com ("display", class_vars, display_command, _("\
2516 Print value of expression EXP each time the program stops.\n\
2517 /FMT may be used before EXP as in the \"print\" command.\n\
2518 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2519 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2520 and examining is done as in the \"x\" command.\n\n\
2521 With no argument, display all currently requested auto-display expressions.\n\
2522 Use \"undisplay\" to cancel display requests previously made."));
2524 add_cmd ("display", class_vars, enable_display_command, _("\
2525 Enable some expressions to be displayed when program stops.\n\
2526 Arguments are the code numbers of the expressions to resume displaying.\n\
2527 No argument means enable all automatic-display expressions.\n\
2528 Do \"info display\" to see current list of code numbers."), &enablelist);
2530 add_cmd ("display", class_vars, disable_display_command, _("\
2531 Disable some expressions to be displayed when program stops.\n\
2532 Arguments are the code numbers of the expressions to stop displaying.\n\
2533 No argument means disable all automatic-display expressions.\n\
2534 Do \"info display\" to see current list of code numbers."), &disablelist);
2536 add_cmd ("display", class_vars, undisplay_command, _("\
2537 Cancel some expressions to be displayed when program stops.\n\
2538 Arguments are the code numbers of the expressions to stop displaying.\n\
2539 No argument means cancel all automatic-display expressions.\n\
2540 Do \"info display\" to see current list of code numbers."), &deletelist);
2542 add_com ("printf", class_vars, printf_command, _("\
2543 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2544 This is useful for formatted output in user-defined commands."));
2546 add_com ("output", class_vars, output_command, _("\
2547 Like \"print\" but don't put in value history and don't print newline.\n\
2548 This is useful in user-defined commands."));
2550 add_prefix_cmd ("set", class_vars, set_command, _("\
2551 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2552 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2553 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2554 with $), a register (a few standard names starting with $), or an actual\n\
2555 variable in the program being debugged. EXP is any valid expression.\n\
2556 Use \"set variable\" for variables with names identical to set subcommands.\n\
2558 With a subcommand, this command modifies parts of the gdb environment.\n\
2559 You can see these environment settings with the \"show\" command."),
2560 &setlist, "set ", 1, &cmdlist);
2562 add_com ("assign", class_vars, set_command, _("\
2563 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2564 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2565 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2566 with $), a register (a few standard names starting with $), or an actual\n\
2567 variable in the program being debugged. EXP is any valid expression.\n\
2568 Use \"set variable\" for variables with names identical to set subcommands.\n\
2569 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2570 You can see these environment settings with the \"show\" command."));
2572 /* "call" is the same as "set", but handy for dbx users to call fns. */
2573 c = add_com ("call", class_vars, call_command, _("\
2574 Call a function in the program.\n\
2575 The argument is the function name and arguments, in the notation of the\n\
2576 current working language. The result is printed and saved in the value\n\
2577 history, if it is not void."));
2578 set_cmd_completer (c, expression_completer);
2580 add_cmd ("variable", class_vars, set_command, _("\
2581 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2582 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2583 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2584 with $), a register (a few standard names starting with $), or an actual\n\
2585 variable in the program being debugged. EXP is any valid expression.\n\
2586 This may usually be abbreviated to simply \"set\"."),
2589 c = add_com ("print", class_vars, print_command, _("\
2590 Print value of expression EXP.\n\
2591 Variables accessible are those of the lexical environment of the selected\n\
2592 stack frame, plus all those whose scope is global or an entire file.\n\
2594 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2595 $$NUM refers to NUM'th value back from the last one.\n\
2596 Names starting with $ refer to registers (with the values they would have\n\
2597 if the program were to return to the stack frame now selected, restoring\n\
2598 all registers saved by frames farther in) or else to debugger\n\
2599 \"convenience\" variables (any such name not a known register).\n\
2600 Use assignment expressions to give values to convenience variables.\n\
2602 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2603 @ is a binary operator for treating consecutive data objects\n\
2604 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2605 element is FOO, whose second element is stored in the space following\n\
2606 where FOO is stored, etc. FOO must be an expression whose value\n\
2607 resides in memory.\n\
2609 EXP may be preceded with /FMT, where FMT is a format letter\n\
2610 but no count or size letter (see \"x\" command)."));
2611 set_cmd_completer (c, expression_completer);
2612 add_com_alias ("p", "print", class_vars, 1);
2613 add_com_alias ("inspect", "print", class_vars, 1);
2615 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2616 &max_symbolic_offset, _("\
2617 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2618 Show the largest offset that will be printed in <symbol+1234> form."), _("\
2619 Tell GDB to only display the symbolic form of an address if the\n\
2620 offset between the closest earlier symbol and the address is less than\n\
2621 the specified maximum offset. The default is \"unlimited\", which tells GDB\n\
2622 to always print the symbolic form of an address if any symbol precedes\n\
2623 it. Zero is equivalent to \"unlimited\"."),
2625 show_max_symbolic_offset,
2626 &setprintlist, &showprintlist);
2627 add_setshow_boolean_cmd ("symbol-filename", no_class,
2628 &print_symbol_filename, _("\
2629 Set printing of source filename and line number with <symbol>."), _("\
2630 Show printing of source filename and line number with <symbol>."), NULL,
2632 show_print_symbol_filename,
2633 &setprintlist, &showprintlist);
2635 add_com ("eval", no_class, eval_command, _("\
2636 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2637 a command line, and call it."));