1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
29 #include "expression.h"
33 #include "breakpoint.h"
37 #include "symfile.h" /* for overlay functions */
38 #include "objfiles.h" /* ditto */
39 #include "completer.h" /* for completion functions */
41 #include "gdb_assert.h"
46 #include "exceptions.h"
49 #include "parser-defs.h"
51 #include "arch-utils.h"
54 #include "tui/tui.h" /* For tui_active et al. */
57 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG)
58 # define USE_PRINTF_I64 1
59 # define PRINTF_HAS_LONG_LONG
61 # define USE_PRINTF_I64 0
64 extern int asm_demangle; /* Whether to demangle syms in asm
73 /* True if the value should be printed raw -- that is, bypassing
74 python-based formatters. */
78 /* Last specified output format. */
80 static char last_format = 0;
82 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
84 static char last_size = 'w';
86 /* Default address to examine next, and associated architecture. */
88 static struct gdbarch *next_gdbarch;
89 static CORE_ADDR next_address;
91 /* Number of delay instructions following current disassembled insn. */
93 static int branch_delay_insns;
95 /* Last address examined. */
97 static CORE_ADDR last_examine_address;
99 /* Contents of last address examined.
100 This is not valid past the end of the `x' command! */
102 static struct value *last_examine_value;
104 /* Largest offset between a symbolic value and an address, that will be
105 printed as `0x1234 <symbol+offset>'. */
107 static unsigned int max_symbolic_offset = UINT_MAX;
109 show_max_symbolic_offset (struct ui_file *file, int from_tty,
110 struct cmd_list_element *c, const char *value)
112 fprintf_filtered (file,
113 _("The largest offset that will be "
114 "printed in <symbol+1234> form is %s.\n"),
118 /* Append the source filename and linenumber of the symbol when
119 printing a symbolic value as `<symbol at filename:linenum>' if set. */
120 static int print_symbol_filename = 0;
122 show_print_symbol_filename (struct ui_file *file, int from_tty,
123 struct cmd_list_element *c, const char *value)
125 fprintf_filtered (file, _("Printing of source filename and "
126 "line number with <symbol> is %s.\n"),
130 /* Number of auto-display expression currently being displayed.
131 So that we can disable it if we get an error or a signal within it.
132 -1 when not doing one. */
134 int current_display_number;
138 /* Chain link to next auto-display item. */
139 struct display *next;
141 /* The expression as the user typed it. */
144 /* Expression to be evaluated and displayed. */
145 struct expression *exp;
147 /* Item number of this auto-display item. */
150 /* Display format specified. */
151 struct format_data format;
153 /* Program space associated with `block'. */
154 struct program_space *pspace;
156 /* Innermost block required by this expression when evaluated. */
159 /* Status of this display (enabled or disabled). */
163 /* Chain of expressions whose values should be displayed
164 automatically each time the program stops. */
166 static struct display *display_chain;
168 static int display_number;
170 /* Walk the following statement or block through all displays. */
172 #define ALL_DISPLAYS(B) \
173 for (B = display_chain; B; B = B->next)
175 /* Prototypes for exported functions. */
177 void output_command (char *, int);
179 void _initialize_printcmd (void);
181 /* Prototypes for local functions. */
183 static void do_one_display (struct display *);
186 /* Decode a format specification. *STRING_PTR should point to it.
187 OFORMAT and OSIZE are used as defaults for the format and size
188 if none are given in the format specification.
189 If OSIZE is zero, then the size field of the returned value
190 should be set only if a size is explicitly specified by the
192 The structure returned describes all the data
193 found in the specification. In addition, *STRING_PTR is advanced
194 past the specification and past all whitespace following it. */
196 static struct format_data
197 decode_format (char **string_ptr, int oformat, int osize)
199 struct format_data val;
200 char *p = *string_ptr;
207 if (*p >= '0' && *p <= '9')
208 val.count = atoi (p);
209 while (*p >= '0' && *p <= '9')
212 /* Now process size or format letters that follow. */
216 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
223 else if (*p >= 'a' && *p <= 'z')
229 while (*p == ' ' || *p == '\t')
233 /* Set defaults for format and size if not specified. */
234 if (val.format == '?')
238 /* Neither has been specified. */
239 val.format = oformat;
243 /* If a size is specified, any format makes a reasonable
244 default except 'i'. */
245 val.format = oformat == 'i' ? 'x' : oformat;
247 else if (val.size == '?')
251 /* Pick the appropriate size for an address. This is deferred
252 until do_examine when we know the actual architecture to use.
253 A special size value of 'a' is used to indicate this case. */
254 val.size = osize ? 'a' : osize;
257 /* Floating point has to be word or giantword. */
258 if (osize == 'w' || osize == 'g')
261 /* Default it to giantword if the last used size is not
263 val.size = osize ? 'g' : osize;
266 /* Characters default to one byte. */
267 val.size = osize ? 'b' : osize;
270 /* Display strings with byte size chars unless explicitly
276 /* The default is the size most recently specified. */
283 /* Print value VAL on stream according to OPTIONS.
284 Do not end with a newline.
285 SIZE is the letter for the size of datum being printed.
286 This is used to pad hex numbers so they line up. SIZE is 0
287 for print / output and set for examine. */
290 print_formatted (struct value *val, int size,
291 const struct value_print_options *options,
292 struct ui_file *stream)
294 struct type *type = check_typedef (value_type (val));
295 int len = TYPE_LENGTH (type);
297 if (VALUE_LVAL (val) == lval_memory)
298 next_address = value_address (val) + len;
302 switch (options->format)
306 struct type *elttype = value_type (val);
308 next_address = (value_address (val)
309 + val_print_string (elttype, NULL,
310 value_address (val), -1,
311 stream, options) * len);
316 /* We often wrap here if there are long symbolic names. */
318 next_address = (value_address (val)
319 + gdb_print_insn (get_type_arch (type),
320 value_address (val), stream,
321 &branch_delay_insns));
326 if (options->format == 0 || options->format == 's'
327 || TYPE_CODE (type) == TYPE_CODE_REF
328 || TYPE_CODE (type) == TYPE_CODE_ARRAY
329 || TYPE_CODE (type) == TYPE_CODE_STRING
330 || TYPE_CODE (type) == TYPE_CODE_STRUCT
331 || TYPE_CODE (type) == TYPE_CODE_UNION
332 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
333 value_print (val, stream, options);
335 /* User specified format, so don't look to the the type to
336 tell us what to do. */
337 val_print_scalar_formatted (type,
338 value_contents_for_printing (val),
339 value_embedded_offset (val),
341 options, size, stream);
344 /* Return builtin floating point type of same length as TYPE.
345 If no such type is found, return TYPE itself. */
347 float_type_from_length (struct type *type)
349 struct gdbarch *gdbarch = get_type_arch (type);
350 const struct builtin_type *builtin = builtin_type (gdbarch);
351 unsigned int len = TYPE_LENGTH (type);
353 if (len == TYPE_LENGTH (builtin->builtin_float))
354 type = builtin->builtin_float;
355 else if (len == TYPE_LENGTH (builtin->builtin_double))
356 type = builtin->builtin_double;
357 else if (len == TYPE_LENGTH (builtin->builtin_long_double))
358 type = builtin->builtin_long_double;
363 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
364 according to OPTIONS and SIZE on STREAM. Formats s and i are not
365 supported at this level. */
368 print_scalar_formatted (const void *valaddr, struct type *type,
369 const struct value_print_options *options,
370 int size, struct ui_file *stream)
372 struct gdbarch *gdbarch = get_type_arch (type);
373 LONGEST val_long = 0;
374 unsigned int len = TYPE_LENGTH (type);
375 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
377 /* String printing should go through val_print_scalar_formatted. */
378 gdb_assert (options->format != 's');
380 if (len > sizeof(LONGEST) &&
381 (TYPE_CODE (type) == TYPE_CODE_INT
382 || TYPE_CODE (type) == TYPE_CODE_ENUM))
384 switch (options->format)
387 print_octal_chars (stream, valaddr, len, byte_order);
391 print_decimal_chars (stream, valaddr, len, byte_order);
394 print_binary_chars (stream, valaddr, len, byte_order);
397 print_hex_chars (stream, valaddr, len, byte_order);
400 print_char_chars (stream, type, valaddr, len, byte_order);
407 if (options->format != 'f')
408 val_long = unpack_long (type, valaddr);
410 /* If the value is a pointer, and pointers and addresses are not the
411 same, then at this point, the value's length (in target bytes) is
412 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
413 if (TYPE_CODE (type) == TYPE_CODE_PTR)
414 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT;
416 /* If we are printing it as unsigned, truncate it in case it is actually
417 a negative signed value (e.g. "print/u (short)-1" should print 65535
418 (if shorts are 16 bits) instead of 4294967295). */
419 if (options->format != 'd' || TYPE_UNSIGNED (type))
421 if (len < sizeof (LONGEST))
422 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
425 switch (options->format)
430 /* No size specified, like in print. Print varying # of digits. */
431 print_longest (stream, 'x', 1, val_long);
440 print_longest (stream, size, 1, val_long);
443 error (_("Undefined output size \"%c\"."), size);
448 print_longest (stream, 'd', 1, val_long);
452 print_longest (stream, 'u', 0, val_long);
457 print_longest (stream, 'o', 1, val_long);
459 fprintf_filtered (stream, "0");
464 CORE_ADDR addr = unpack_pointer (type, valaddr);
466 print_address (gdbarch, addr, stream);
472 struct value_print_options opts = *options;
475 if (TYPE_UNSIGNED (type))
476 type = builtin_type (gdbarch)->builtin_true_unsigned_char;
478 type = builtin_type (gdbarch)->builtin_true_char;
480 value_print (value_from_longest (type, val_long), stream, &opts);
485 type = float_type_from_length (type);
486 print_floating (valaddr, type, stream);
490 internal_error (__FILE__, __LINE__,
491 _("failed internal consistency check"));
494 /* Binary; 't' stands for "two". */
496 char bits[8 * (sizeof val_long) + 1];
497 char buf[8 * (sizeof val_long) + 32];
502 width = 8 * (sizeof val_long);
519 error (_("Undefined output size \"%c\"."), size);
525 bits[width] = (val_long & 1) ? '1' : '0';
530 while (*cp && *cp == '0')
536 fputs_filtered (buf, stream);
541 error (_("Undefined output format \"%c\"."), options->format);
545 /* Specify default address for `x' command.
546 The `info lines' command uses this. */
549 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
551 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
553 next_gdbarch = gdbarch;
556 /* Make address available to the user as $_. */
557 set_internalvar (lookup_internalvar ("_"),
558 value_from_pointer (ptr_type, addr));
561 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
562 after LEADIN. Print nothing if no symbolic name is found nearby.
563 Optionally also print source file and line number, if available.
564 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
565 or to interpret it as a possible C++ name and convert it back to source
566 form. However note that DO_DEMANGLE can be overridden by the specific
567 settings of the demangle and asm_demangle variables. */
570 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
571 struct ui_file *stream,
572 int do_demangle, char *leadin)
575 char *filename = NULL;
580 /* Throw away both name and filename. */
581 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
582 make_cleanup (free_current_contents, &filename);
584 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset,
585 &filename, &line, &unmapped))
587 do_cleanups (cleanup_chain);
591 fputs_filtered (leadin, stream);
593 fputs_filtered ("<*", stream);
595 fputs_filtered ("<", stream);
596 fputs_filtered (name, stream);
598 fprintf_filtered (stream, "+%u", (unsigned int) offset);
600 /* Append source filename and line number if desired. Give specific
601 line # of this addr, if we have it; else line # of the nearest symbol. */
602 if (print_symbol_filename && filename != NULL)
605 fprintf_filtered (stream, " at %s:%d", filename, line);
607 fprintf_filtered (stream, " in %s", filename);
610 fputs_filtered ("*>", stream);
612 fputs_filtered (">", stream);
614 do_cleanups (cleanup_chain);
617 /* Given an address ADDR return all the elements needed to print the
618 address in a symbolic form. NAME can be mangled or not depending
619 on DO_DEMANGLE (and also on the asm_demangle global variable,
620 manipulated via ''set print asm-demangle''). Return 0 in case of
621 success, when all the info in the OUT paramters is valid. Return 1
624 build_address_symbolic (struct gdbarch *gdbarch,
625 CORE_ADDR addr, /* IN */
626 int do_demangle, /* IN */
627 char **name, /* OUT */
628 int *offset, /* OUT */
629 char **filename, /* OUT */
631 int *unmapped) /* OUT */
633 struct minimal_symbol *msymbol;
634 struct symbol *symbol;
635 CORE_ADDR name_location = 0;
636 struct obj_section *section = NULL;
637 char *name_temp = "";
639 /* Let's say it is mapped (not unmapped). */
642 /* Determine if the address is in an overlay, and whether it is
644 if (overlay_debugging)
646 section = find_pc_overlay (addr);
647 if (pc_in_unmapped_range (addr, section))
650 addr = overlay_mapped_address (addr, section);
654 /* First try to find the address in the symbol table, then
655 in the minsyms. Take the closest one. */
657 /* This is defective in the sense that it only finds text symbols. So
658 really this is kind of pointless--we should make sure that the
659 minimal symbols have everything we need (by changing that we could
660 save some memory, but for many debug format--ELF/DWARF or
661 anything/stabs--it would be inconvenient to eliminate those minimal
663 msymbol = lookup_minimal_symbol_by_pc_section (addr, section);
664 symbol = find_pc_sect_function (addr, section);
668 /* If this is a function (i.e. a code address), strip out any
669 non-address bits. For instance, display a pointer to the
670 first instruction of a Thumb function as <function>; the
671 second instruction will be <function+2>, even though the
672 pointer is <function+3>. This matches the ISA behavior. */
673 addr = gdbarch_addr_bits_remove (gdbarch, addr);
675 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
676 if (do_demangle || asm_demangle)
677 name_temp = SYMBOL_PRINT_NAME (symbol);
679 name_temp = SYMBOL_LINKAGE_NAME (symbol);
684 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
686 /* The msymbol is closer to the address than the symbol;
687 use the msymbol instead. */
689 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
690 if (do_demangle || asm_demangle)
691 name_temp = SYMBOL_PRINT_NAME (msymbol);
693 name_temp = SYMBOL_LINKAGE_NAME (msymbol);
696 if (symbol == NULL && msymbol == NULL)
699 /* If the nearest symbol is too far away, don't print anything symbolic. */
701 /* For when CORE_ADDR is larger than unsigned int, we do math in
702 CORE_ADDR. But when we detect unsigned wraparound in the
703 CORE_ADDR math, we ignore this test and print the offset,
704 because addr+max_symbolic_offset has wrapped through the end
705 of the address space back to the beginning, giving bogus comparison. */
706 if (addr > name_location + max_symbolic_offset
707 && name_location + max_symbolic_offset > name_location)
710 *offset = addr - name_location;
712 *name = xstrdup (name_temp);
714 if (print_symbol_filename)
716 struct symtab_and_line sal;
718 sal = find_pc_sect_line (addr, section, 0);
722 *filename = xstrdup (sal.symtab->filename);
730 /* Print address ADDR symbolically on STREAM.
731 First print it as a number. Then perhaps print
732 <SYMBOL + OFFSET> after the number. */
735 print_address (struct gdbarch *gdbarch,
736 CORE_ADDR addr, struct ui_file *stream)
738 fputs_filtered (paddress (gdbarch, addr), stream);
739 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " ");
742 /* Return a prefix for instruction address:
743 "=> " for current instruction, else " ". */
746 pc_prefix (CORE_ADDR addr)
748 if (has_stack_frames ())
750 struct frame_info *frame;
753 frame = get_selected_frame (NULL);
754 pc = get_frame_pc (frame);
762 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
763 controls whether to print the symbolic name "raw" or demangled.
764 Global setting "addressprint" controls whether to print hex address
768 print_address_demangle (struct gdbarch *gdbarch, CORE_ADDR addr,
769 struct ui_file *stream, int do_demangle)
771 struct value_print_options opts;
773 get_user_print_options (&opts);
776 fprintf_filtered (stream, "0");
778 else if (opts.addressprint)
780 fputs_filtered (paddress (gdbarch, addr), stream);
781 print_address_symbolic (gdbarch, addr, stream, do_demangle, " ");
785 print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
790 /* Examine data at address ADDR in format FMT.
791 Fetch it from memory and print on gdb_stdout. */
794 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr)
799 struct type *val_type = NULL;
802 struct value_print_options opts;
807 next_gdbarch = gdbarch;
810 /* Instruction format implies fetch single bytes
811 regardless of the specified size.
812 The case of strings is handled in decode_format, only explicit
813 size operator are not changed to 'b'. */
819 /* Pick the appropriate size for an address. */
820 if (gdbarch_ptr_bit (next_gdbarch) == 64)
822 else if (gdbarch_ptr_bit (next_gdbarch) == 32)
824 else if (gdbarch_ptr_bit (next_gdbarch) == 16)
827 /* Bad value for gdbarch_ptr_bit. */
828 internal_error (__FILE__, __LINE__,
829 _("failed internal consistency check"));
833 val_type = builtin_type (next_gdbarch)->builtin_int8;
834 else if (size == 'h')
835 val_type = builtin_type (next_gdbarch)->builtin_int16;
836 else if (size == 'w')
837 val_type = builtin_type (next_gdbarch)->builtin_int32;
838 else if (size == 'g')
839 val_type = builtin_type (next_gdbarch)->builtin_int64;
843 struct type *char_type = NULL;
845 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
846 if type is not found. */
848 char_type = builtin_type (next_gdbarch)->builtin_char16;
849 else if (size == 'w')
850 char_type = builtin_type (next_gdbarch)->builtin_char32;
852 val_type = char_type;
855 if (size != '\0' && size != 'b')
856 warning (_("Unable to display strings with "
857 "size '%c', using 'b' instead."), size);
859 val_type = builtin_type (next_gdbarch)->builtin_int8;
868 if (format == 's' || format == 'i')
871 get_formatted_print_options (&opts, format);
873 /* Print as many objects as specified in COUNT, at most maxelts per line,
874 with the address of the next one at the start of each line. */
880 fputs_filtered (pc_prefix (next_address), gdb_stdout);
881 print_address (next_gdbarch, next_address, gdb_stdout);
882 printf_filtered (":");
887 printf_filtered ("\t");
888 /* Note that print_formatted sets next_address for the next
890 last_examine_address = next_address;
892 if (last_examine_value)
893 value_free (last_examine_value);
895 /* The value to be displayed is not fetched greedily.
896 Instead, to avoid the possibility of a fetched value not
897 being used, its retrieval is delayed until the print code
898 uses it. When examining an instruction stream, the
899 disassembler will perform its own memory fetch using just
900 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
901 the disassembler be modified so that LAST_EXAMINE_VALUE
902 is left with the byte sequence from the last complete
903 instruction fetched from memory? */
904 last_examine_value = value_at_lazy (val_type, next_address);
906 if (last_examine_value)
907 release_value (last_examine_value);
909 print_formatted (last_examine_value, size, &opts, gdb_stdout);
911 /* Display any branch delay slots following the final insn. */
912 if (format == 'i' && count == 1)
913 count += branch_delay_insns;
915 printf_filtered ("\n");
916 gdb_flush (gdb_stdout);
921 validate_format (struct format_data fmt, char *cmdname)
924 error (_("Size letters are meaningless in \"%s\" command."), cmdname);
926 error (_("Item count other than 1 is meaningless in \"%s\" command."),
928 if (fmt.format == 'i')
929 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
930 fmt.format, cmdname);
933 /* Evaluate string EXP as an expression in the current language and
934 print the resulting value. EXP may contain a format specifier as the
935 first argument ("/x myvar" for example, to print myvar in hex). */
938 print_command_1 (char *exp, int inspect, int voidprint)
940 struct expression *expr;
941 struct cleanup *old_chain = 0;
944 struct format_data fmt;
947 if (exp && *exp == '/')
950 fmt = decode_format (&exp, last_format, 0);
951 validate_format (fmt, "print");
952 last_format = format = fmt.format;
964 expr = parse_expression (exp);
965 old_chain = make_cleanup (free_current_contents, &expr);
967 val = evaluate_expression (expr);
970 val = access_value_history (0);
972 if (voidprint || (val && value_type (val) &&
973 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
975 struct value_print_options opts;
976 int histindex = record_latest_value (val);
979 annotate_value_history_begin (histindex, value_type (val));
981 annotate_value_begin (value_type (val));
984 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
986 else if (histindex >= 0)
987 printf_filtered ("$%d = ", histindex);
990 annotate_value_history_value ();
992 get_formatted_print_options (&opts, format);
993 opts.inspect_it = inspect;
996 print_formatted (val, fmt.size, &opts, gdb_stdout);
997 printf_filtered ("\n");
1000 annotate_value_history_end ();
1002 annotate_value_end ();
1005 printf_unfiltered ("\") )\030");
1009 do_cleanups (old_chain);
1013 print_command (char *exp, int from_tty)
1015 print_command_1 (exp, 0, 1);
1018 /* Same as print, except in epoch, it gets its own window. */
1020 inspect_command (char *exp, int from_tty)
1022 extern int epoch_interface;
1024 print_command_1 (exp, epoch_interface, 1);
1027 /* Same as print, except it doesn't print void results. */
1029 call_command (char *exp, int from_tty)
1031 print_command_1 (exp, 0, 0);
1035 output_command (char *exp, int from_tty)
1037 struct expression *expr;
1038 struct cleanup *old_chain;
1041 struct format_data fmt;
1042 struct value_print_options opts;
1047 if (exp && *exp == '/')
1050 fmt = decode_format (&exp, 0, 0);
1051 validate_format (fmt, "output");
1052 format = fmt.format;
1055 expr = parse_expression (exp);
1056 old_chain = make_cleanup (free_current_contents, &expr);
1058 val = evaluate_expression (expr);
1060 annotate_value_begin (value_type (val));
1062 get_formatted_print_options (&opts, format);
1064 print_formatted (val, fmt.size, &opts, gdb_stdout);
1066 annotate_value_end ();
1069 gdb_flush (gdb_stdout);
1071 do_cleanups (old_chain);
1075 set_command (char *exp, int from_tty)
1077 struct expression *expr = parse_expression (exp);
1078 struct cleanup *old_chain =
1079 make_cleanup (free_current_contents, &expr);
1081 evaluate_expression (expr);
1082 do_cleanups (old_chain);
1086 sym_info (char *arg, int from_tty)
1088 struct minimal_symbol *msymbol;
1089 struct objfile *objfile;
1090 struct obj_section *osect;
1091 CORE_ADDR addr, sect_addr;
1093 unsigned int offset;
1096 error_no_arg (_("address"));
1098 addr = parse_and_eval_address (arg);
1099 ALL_OBJSECTIONS (objfile, osect)
1101 /* Only process each object file once, even if there's a separate
1103 if (objfile->separate_debug_objfile_backlink)
1106 sect_addr = overlay_mapped_address (addr, osect);
1108 if (obj_section_addr (osect) <= sect_addr
1109 && sect_addr < obj_section_endaddr (osect)
1110 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect)))
1112 const char *obj_name, *mapped, *sec_name, *msym_name;
1114 struct cleanup *old_chain;
1117 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1118 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
1119 sec_name = osect->the_bfd_section->name;
1120 msym_name = SYMBOL_PRINT_NAME (msymbol);
1122 /* Don't print the offset if it is zero.
1123 We assume there's no need to handle i18n of "sym + offset". */
1125 loc_string = xstrprintf ("%s + %u", msym_name, offset);
1127 loc_string = xstrprintf ("%s", msym_name);
1129 /* Use a cleanup to free loc_string in case the user quits
1130 a pagination request inside printf_filtered. */
1131 old_chain = make_cleanup (xfree, loc_string);
1133 gdb_assert (osect->objfile && osect->objfile->name);
1134 obj_name = osect->objfile->name;
1136 if (MULTI_OBJFILE_P ())
1137 if (pc_in_unmapped_range (addr, osect))
1138 if (section_is_overlay (osect))
1139 printf_filtered (_("%s in load address range of "
1140 "%s overlay section %s of %s\n"),
1141 loc_string, mapped, sec_name, obj_name);
1143 printf_filtered (_("%s in load address range of "
1144 "section %s of %s\n"),
1145 loc_string, sec_name, obj_name);
1147 if (section_is_overlay (osect))
1148 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1149 loc_string, mapped, sec_name, obj_name);
1151 printf_filtered (_("%s in section %s of %s\n"),
1152 loc_string, sec_name, obj_name);
1154 if (pc_in_unmapped_range (addr, osect))
1155 if (section_is_overlay (osect))
1156 printf_filtered (_("%s in load address range of %s overlay "
1158 loc_string, mapped, sec_name);
1160 printf_filtered (_("%s in load address range of section %s\n"),
1161 loc_string, sec_name);
1163 if (section_is_overlay (osect))
1164 printf_filtered (_("%s in %s overlay section %s\n"),
1165 loc_string, mapped, sec_name);
1167 printf_filtered (_("%s in section %s\n"),
1168 loc_string, sec_name);
1170 do_cleanups (old_chain);
1174 printf_filtered (_("No symbol matches %s.\n"), arg);
1178 address_info (char *exp, int from_tty)
1180 struct gdbarch *gdbarch;
1183 struct minimal_symbol *msymbol;
1185 struct obj_section *section;
1186 CORE_ADDR load_addr, context_pc = 0;
1187 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
1188 if exp is a field of `this'. */
1191 error (_("Argument required."));
1193 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
1194 &is_a_field_of_this);
1197 if (is_a_field_of_this)
1199 printf_filtered ("Symbol \"");
1200 fprintf_symbol_filtered (gdb_stdout, exp,
1201 current_language->la_language, DMGL_ANSI);
1202 printf_filtered ("\" is a field of the local class variable ");
1203 if (current_language->la_language == language_objc)
1204 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1206 printf_filtered ("`this'\n");
1210 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1212 if (msymbol != NULL)
1214 gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
1215 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1217 printf_filtered ("Symbol \"");
1218 fprintf_symbol_filtered (gdb_stdout, exp,
1219 current_language->la_language, DMGL_ANSI);
1220 printf_filtered ("\" is at ");
1221 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1222 printf_filtered (" in a file compiled without debugging");
1223 section = SYMBOL_OBJ_SECTION (msymbol);
1224 if (section_is_overlay (section))
1226 load_addr = overlay_unmapped_address (load_addr, section);
1227 printf_filtered (",\n -- loaded at ");
1228 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1229 printf_filtered (" in overlay section %s",
1230 section->the_bfd_section->name);
1232 printf_filtered (".\n");
1235 error (_("No symbol \"%s\" in current context."), exp);
1239 printf_filtered ("Symbol \"");
1240 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1241 current_language->la_language, DMGL_ANSI);
1242 printf_filtered ("\" is ");
1243 val = SYMBOL_VALUE (sym);
1244 section = SYMBOL_OBJ_SECTION (sym);
1245 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1247 switch (SYMBOL_CLASS (sym))
1250 case LOC_CONST_BYTES:
1251 printf_filtered ("constant");
1255 printf_filtered ("a label at address ");
1256 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1257 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1258 if (section_is_overlay (section))
1260 load_addr = overlay_unmapped_address (load_addr, section);
1261 printf_filtered (",\n -- loaded at ");
1262 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1263 printf_filtered (" in overlay section %s",
1264 section->the_bfd_section->name);
1269 /* FIXME: cagney/2004-01-26: It should be possible to
1270 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1271 Unfortunately DWARF 2 stores the frame-base (instead of the
1272 function) location in a function's symbol. Oops! For the
1273 moment enable this when/where applicable. */
1274 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
1279 /* GDBARCH is the architecture associated with the objfile the symbol
1280 is defined in; the target architecture may be different, and may
1281 provide additional registers. However, we do not know the target
1282 architecture at this point. We assume the objfile architecture
1283 will contain all the standard registers that occur in debug info
1285 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1287 if (SYMBOL_IS_ARGUMENT (sym))
1288 printf_filtered (_("an argument in register %s"),
1289 gdbarch_register_name (gdbarch, regno));
1291 printf_filtered (_("a variable in register %s"),
1292 gdbarch_register_name (gdbarch, regno));
1296 printf_filtered (_("static storage at address "));
1297 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1298 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1299 if (section_is_overlay (section))
1301 load_addr = overlay_unmapped_address (load_addr, section);
1302 printf_filtered (_(",\n -- loaded at "));
1303 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1304 printf_filtered (_(" in overlay section %s"),
1305 section->the_bfd_section->name);
1309 case LOC_REGPARM_ADDR:
1310 /* Note comment at LOC_REGISTER. */
1311 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1312 printf_filtered (_("address of an argument in register %s"),
1313 gdbarch_register_name (gdbarch, regno));
1317 printf_filtered (_("an argument at offset %ld"), val);
1321 printf_filtered (_("a local variable at frame offset %ld"), val);
1325 printf_filtered (_("a reference argument at offset %ld"), val);
1329 printf_filtered (_("a typedef"));
1333 printf_filtered (_("a function at address "));
1334 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1335 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1336 if (section_is_overlay (section))
1338 load_addr = overlay_unmapped_address (load_addr, section);
1339 printf_filtered (_(",\n -- loaded at "));
1340 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1341 printf_filtered (_(" in overlay section %s"),
1342 section->the_bfd_section->name);
1346 case LOC_UNRESOLVED:
1348 struct minimal_symbol *msym;
1350 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
1352 printf_filtered ("unresolved");
1355 section = SYMBOL_OBJ_SECTION (msym);
1356 load_addr = SYMBOL_VALUE_ADDRESS (msym);
1359 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1360 printf_filtered (_("a thread-local variable at offset %s "
1361 "in the thread-local storage for `%s'"),
1362 paddress (gdbarch, load_addr),
1363 section->objfile->name);
1366 printf_filtered (_("static storage at address "));
1367 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1368 if (section_is_overlay (section))
1370 load_addr = overlay_unmapped_address (load_addr, section);
1371 printf_filtered (_(",\n -- loaded at "));
1372 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1373 printf_filtered (_(" in overlay section %s"),
1374 section->the_bfd_section->name);
1381 case LOC_OPTIMIZED_OUT:
1382 printf_filtered (_("optimized out"));
1386 printf_filtered (_("of unknown (botched) type"));
1389 printf_filtered (".\n");
1394 x_command (char *exp, int from_tty)
1396 struct expression *expr;
1397 struct format_data fmt;
1398 struct cleanup *old_chain;
1401 fmt.format = last_format ? last_format : 'x';
1402 fmt.size = last_size;
1406 if (exp && *exp == '/')
1409 fmt = decode_format (&exp, last_format, last_size);
1412 /* If we have an expression, evaluate it and use it as the address. */
1414 if (exp != 0 && *exp != 0)
1416 expr = parse_expression (exp);
1417 /* Cause expression not to be there any more if this command is
1418 repeated with Newline. But don't clobber a user-defined
1419 command's definition. */
1422 old_chain = make_cleanup (free_current_contents, &expr);
1423 val = evaluate_expression (expr);
1424 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1425 val = coerce_ref (val);
1426 /* In rvalue contexts, such as this, functions are coerced into
1427 pointers to functions. This makes "x/i main" work. */
1428 if (/* last_format == 'i' && */
1429 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1430 && VALUE_LVAL (val) == lval_memory)
1431 next_address = value_address (val);
1433 next_address = value_as_address (val);
1435 next_gdbarch = expr->gdbarch;
1436 do_cleanups (old_chain);
1440 error_no_arg (_("starting display address"));
1442 do_examine (fmt, next_gdbarch, next_address);
1444 /* If the examine succeeds, we remember its size and format for next
1445 time. Set last_size to 'b' for strings. */
1446 if (fmt.format == 's')
1449 last_size = fmt.size;
1450 last_format = fmt.format;
1452 /* Set a couple of internal variables if appropriate. */
1453 if (last_examine_value)
1455 /* Make last address examined available to the user as $_. Use
1456 the correct pointer type. */
1457 struct type *pointer_type
1458 = lookup_pointer_type (value_type (last_examine_value));
1459 set_internalvar (lookup_internalvar ("_"),
1460 value_from_pointer (pointer_type,
1461 last_examine_address));
1463 /* Make contents of last address examined available to the user
1464 as $__. If the last value has not been fetched from memory
1465 then don't fetch it now; instead mark it by voiding the $__
1467 if (value_lazy (last_examine_value))
1468 clear_internalvar (lookup_internalvar ("__"));
1470 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1475 /* Add an expression to the auto-display chain.
1476 Specify the expression. */
1479 display_command (char *exp, int from_tty)
1481 struct format_data fmt;
1482 struct expression *expr;
1483 struct display *new;
1487 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1489 if (tui_active && exp != NULL && *exp == '$')
1490 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1504 fmt = decode_format (&exp, 0, 0);
1505 if (fmt.size && fmt.format == 0)
1507 if (fmt.format == 'i' || fmt.format == 's')
1518 innermost_block = NULL;
1519 expr = parse_expression (exp);
1521 new = (struct display *) xmalloc (sizeof (struct display));
1523 new->exp_string = xstrdup (exp);
1525 new->block = innermost_block;
1526 new->pspace = current_program_space;
1527 new->next = display_chain;
1528 new->number = ++display_number;
1531 display_chain = new;
1533 if (from_tty && target_has_execution)
1534 do_one_display (new);
1541 free_display (struct display *d)
1543 xfree (d->exp_string);
1548 /* Clear out the display_chain. Done when new symtabs are loaded,
1549 since this invalidates the types stored in many expressions. */
1552 clear_displays (void)
1556 while ((d = display_chain) != NULL)
1558 display_chain = d->next;
1563 /* Delete the auto-display DISPLAY. */
1566 delete_display (struct display *display)
1570 gdb_assert (display != NULL);
1572 if (display_chain == display)
1573 display_chain = display->next;
1576 if (d->next == display)
1578 d->next = display->next;
1582 free_display (display);
1585 /* Delete some values from the auto-display chain.
1586 Specify the element numbers. */
1589 undisplay_command (char *args, int from_tty)
1597 if (query (_("Delete all auto-display expressions? ")))
1607 num = get_number_or_range (&p1);
1609 warning (_("bad display number at or near '%s'"), p);
1615 if (d->number == num)
1618 printf_unfiltered (_("No display number %d.\n"), num);
1628 /* Display a single auto-display.
1629 Do nothing if the display cannot be printed in the current context,
1630 or if the display is disabled. */
1633 do_one_display (struct display *d)
1635 int within_current_scope;
1637 if (d->enabled_p == 0)
1640 /* The expression carries the architecture that was used at parse time.
1641 This is a problem if the expression depends on architecture features
1642 (e.g. register numbers), and the current architecture is now different.
1643 For example, a display statement like "display/i $pc" is expected to
1644 display the PC register of the current architecture, not the arch at
1645 the time the display command was given. Therefore, we re-parse the
1646 expression if the current architecture has changed. */
1647 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ())
1656 volatile struct gdb_exception ex;
1658 TRY_CATCH (ex, RETURN_MASK_ALL)
1660 innermost_block = NULL;
1661 d->exp = parse_expression (d->exp_string);
1662 d->block = innermost_block;
1666 /* Can't re-parse the expression. Disable this display item. */
1668 warning (_("Unable to display \"%s\": %s"),
1669 d->exp_string, ex.message);
1676 if (d->pspace == current_program_space)
1677 within_current_scope = contained_in (get_selected_block (0), d->block);
1679 within_current_scope = 0;
1682 within_current_scope = 1;
1683 if (!within_current_scope)
1686 current_display_number = d->number;
1688 annotate_display_begin ();
1689 printf_filtered ("%d", d->number);
1690 annotate_display_number_end ();
1691 printf_filtered (": ");
1697 annotate_display_format ();
1699 printf_filtered ("x/");
1700 if (d->format.count != 1)
1701 printf_filtered ("%d", d->format.count);
1702 printf_filtered ("%c", d->format.format);
1703 if (d->format.format != 'i' && d->format.format != 's')
1704 printf_filtered ("%c", d->format.size);
1705 printf_filtered (" ");
1707 annotate_display_expression ();
1709 puts_filtered (d->exp_string);
1710 annotate_display_expression_end ();
1712 if (d->format.count != 1 || d->format.format == 'i')
1713 printf_filtered ("\n");
1715 printf_filtered (" ");
1717 val = evaluate_expression (d->exp);
1718 addr = value_as_address (val);
1719 if (d->format.format == 'i')
1720 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
1722 annotate_display_value ();
1724 do_examine (d->format, d->exp->gdbarch, addr);
1728 struct value_print_options opts;
1730 annotate_display_format ();
1732 if (d->format.format)
1733 printf_filtered ("/%c ", d->format.format);
1735 annotate_display_expression ();
1737 puts_filtered (d->exp_string);
1738 annotate_display_expression_end ();
1740 printf_filtered (" = ");
1742 annotate_display_expression ();
1744 get_formatted_print_options (&opts, d->format.format);
1745 opts.raw = d->format.raw;
1746 print_formatted (evaluate_expression (d->exp),
1747 d->format.size, &opts, gdb_stdout);
1748 printf_filtered ("\n");
1751 annotate_display_end ();
1753 gdb_flush (gdb_stdout);
1754 current_display_number = -1;
1757 /* Display all of the values on the auto-display chain which can be
1758 evaluated in the current scope. */
1765 for (d = display_chain; d; d = d->next)
1769 /* Delete the auto-display which we were in the process of displaying.
1770 This is done when there is an error or a signal. */
1773 disable_display (int num)
1777 for (d = display_chain; d; d = d->next)
1778 if (d->number == num)
1783 printf_unfiltered (_("No display number %d.\n"), num);
1787 disable_current_display (void)
1789 if (current_display_number >= 0)
1791 disable_display (current_display_number);
1792 fprintf_unfiltered (gdb_stderr,
1793 _("Disabling display %d to "
1794 "avoid infinite recursion.\n"),
1795 current_display_number);
1797 current_display_number = -1;
1801 display_info (char *ignore, int from_tty)
1806 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1808 printf_filtered (_("Auto-display expressions now in effect:\n\
1809 Num Enb Expression\n"));
1811 for (d = display_chain; d; d = d->next)
1813 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1815 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1817 else if (d->format.format)
1818 printf_filtered ("/%c ", d->format.format);
1819 puts_filtered (d->exp_string);
1820 if (d->block && !contained_in (get_selected_block (0), d->block))
1821 printf_filtered (_(" (cannot be evaluated in the current context)"));
1822 printf_filtered ("\n");
1823 gdb_flush (gdb_stdout);
1828 enable_display (char *args, int from_tty)
1837 for (d = display_chain; d; d = d->next)
1844 while (*p1 >= '0' && *p1 <= '9')
1846 if (*p1 && *p1 != ' ' && *p1 != '\t')
1847 error (_("Arguments must be display numbers."));
1851 for (d = display_chain; d; d = d->next)
1852 if (d->number == num)
1857 printf_unfiltered (_("No display number %d.\n"), num);
1860 while (*p == ' ' || *p == '\t')
1866 disable_display_command (char *args, int from_tty)
1874 for (d = display_chain; d; d = d->next)
1881 while (*p1 >= '0' && *p1 <= '9')
1883 if (*p1 && *p1 != ' ' && *p1 != '\t')
1884 error (_("Arguments must be display numbers."));
1886 disable_display (atoi (p));
1889 while (*p == ' ' || *p == '\t')
1894 /* display_chain items point to blocks and expressions. Some expressions in
1895 turn may point to symbols.
1896 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1897 obstack_free'd when a shared library is unloaded.
1898 Clear pointers that are about to become dangling.
1899 Both .exp and .block fields will be restored next time we need to display
1900 an item by re-parsing .exp_string field in the new execution context. */
1903 clear_dangling_display_expressions (struct so_list *solib)
1905 struct objfile *objfile = solib->objfile;
1908 /* With no symbol file we cannot have a block or expression from it. */
1909 if (objfile == NULL)
1911 if (objfile->separate_debug_objfile_backlink)
1912 objfile = objfile->separate_debug_objfile_backlink;
1913 gdb_assert (objfile->pspace == solib->pspace);
1915 for (d = display_chain; d != NULL; d = d->next)
1917 if (d->pspace != solib->pspace)
1920 if (lookup_objfile_from_block (d->block) == objfile
1921 || (d->exp && exp_uses_objfile (d->exp, objfile)))
1931 /* Print the value in stack frame FRAME of a variable specified by a
1932 struct symbol. NAME is the name to print; if NULL then VAR's print
1933 name will be used. STREAM is the ui_file on which to print the
1934 value. INDENT specifies the number of indent levels to print
1935 before printing the variable name. */
1938 print_variable_and_value (const char *name, struct symbol *var,
1939 struct frame_info *frame,
1940 struct ui_file *stream, int indent)
1942 volatile struct gdb_exception except;
1945 name = SYMBOL_PRINT_NAME (var);
1947 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name);
1948 TRY_CATCH (except, RETURN_MASK_ERROR)
1951 struct value_print_options opts;
1953 val = read_var_value (var, frame);
1954 get_user_print_options (&opts);
1955 common_val_print (val, stream, indent, &opts, current_language);
1957 if (except.reason < 0)
1958 fprintf_filtered(stream, "<error reading variable %s (%s)>", name,
1960 fprintf_filtered (stream, "\n");
1963 /* printf "printf format string" ARG to STREAM. */
1966 ui_printf (char *arg, struct ui_file *stream)
1970 char *string = NULL;
1971 struct value **val_args;
1973 char *current_substring;
1975 int allocated_args = 20;
1976 struct cleanup *old_cleanups;
1978 val_args = xmalloc (allocated_args * sizeof (struct value *));
1979 old_cleanups = make_cleanup (free_current_contents, &val_args);
1982 error_no_arg (_("format-control string and values to print"));
1984 /* Skip white space before format string. */
1985 while (*s == ' ' || *s == '\t')
1988 /* A format string should follow, enveloped in double quotes. */
1990 error (_("Bad format string, missing '\"'."));
1992 /* Parse the format-control string and copy it into the string STRING,
1993 processing some kinds of escape sequence. */
1995 f = string = (char *) alloca (strlen (s) + 1);
2003 error (_("Bad format string, non-terminated '\"'."));
2036 /* ??? TODO: handle other escape sequences. */
2037 error (_("Unrecognized escape character \\%c in format string."),
2047 /* Skip over " and following space and comma. */
2050 while (*s == ' ' || *s == '\t')
2053 if (*s != ',' && *s != 0)
2054 error (_("Invalid argument syntax"));
2058 while (*s == ' ' || *s == '\t')
2061 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2062 substrings = alloca (strlen (string) * 2);
2063 current_substring = substrings;
2066 /* Now scan the string for %-specs and see what kinds of args they want.
2067 argclass[I] classifies the %-specs so we can give printf_filtered
2068 something of the right size. */
2072 int_arg, long_arg, long_long_arg, ptr_arg,
2073 string_arg, wide_string_arg, wide_char_arg,
2074 double_arg, long_double_arg, decfloat_arg
2076 enum argclass *argclass;
2077 enum argclass this_argclass;
2082 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass);
2089 int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0;
2090 int seen_space = 0, seen_plus = 0;
2091 int seen_big_l = 0, seen_h = 0, seen_big_h = 0;
2092 int seen_big_d = 0, seen_double_big_d = 0;
2095 /* Check the validity of the format specifier, and work
2096 out what argument it expects. We only accept C89
2097 format strings, with the exception of long long (which
2098 we autoconf for). */
2100 /* Skip over "%%". */
2107 /* The first part of a format specifier is a set of flag
2109 while (strchr ("0-+ #", *f))
2122 /* The next part of a format specifier is a width. */
2123 while (strchr ("0123456789", *f))
2126 /* The next part of a format specifier is a precision. */
2131 while (strchr ("0123456789", *f))
2135 /* The next part of a format specifier is a length modifier. */
2156 /* Decimal32 modifier. */
2162 /* Decimal64 and Decimal128 modifiers. */
2167 /* Check for a Decimal128. */
2171 seen_double_big_d = 1;
2187 if (seen_space || seen_plus)
2194 this_argclass = int_arg;
2195 else if (lcount == 1)
2196 this_argclass = long_arg;
2198 this_argclass = long_long_arg;
2205 this_argclass = lcount == 0 ? int_arg : wide_char_arg;
2206 if (lcount > 1 || seen_h || seen_big_l)
2208 if (seen_prec || seen_zero || seen_space || seen_plus)
2213 this_argclass = ptr_arg;
2214 if (lcount || seen_h || seen_big_l)
2216 if (seen_prec || seen_zero || seen_space || seen_plus)
2221 this_argclass = lcount == 0 ? string_arg : wide_string_arg;
2222 if (lcount > 1 || seen_h || seen_big_l)
2224 if (seen_zero || seen_space || seen_plus)
2233 if (seen_big_h || seen_big_d || seen_double_big_d)
2234 this_argclass = decfloat_arg;
2235 else if (seen_big_l)
2236 this_argclass = long_double_arg;
2238 this_argclass = double_arg;
2240 if (lcount || seen_h)
2245 error (_("`*' not supported for precision or width in printf"));
2248 error (_("Format specifier `n' not supported in printf"));
2251 error (_("Incomplete format specifier at end of format string"));
2254 error (_("Unrecognized format specifier '%c' in printf"), *f);
2258 error (_("Inappropriate modifiers to "
2259 "format specifier '%c' in printf"),
2264 if (lcount > 1 && USE_PRINTF_I64)
2266 /* Windows' printf does support long long, but not the usual way.
2267 Convert %lld to %I64d. */
2268 int length_before_ll = f - last_arg - 1 - lcount;
2270 strncpy (current_substring, last_arg, length_before_ll);
2271 strcpy (current_substring + length_before_ll, "I64");
2272 current_substring[length_before_ll + 3] =
2273 last_arg[length_before_ll + lcount];
2274 current_substring += length_before_ll + 4;
2276 else if (this_argclass == wide_string_arg
2277 || this_argclass == wide_char_arg)
2279 /* Convert %ls or %lc to %s. */
2280 int length_before_ls = f - last_arg - 2;
2282 strncpy (current_substring, last_arg, length_before_ls);
2283 strcpy (current_substring + length_before_ls, "s");
2284 current_substring += length_before_ls + 2;
2288 strncpy (current_substring, last_arg, f - last_arg);
2289 current_substring += f - last_arg;
2291 *current_substring++ = '\0';
2293 argclass[nargs_wanted++] = this_argclass;
2296 /* Now, parse all arguments and evaluate them.
2297 Store the VALUEs in VAL_ARGS. */
2303 if (nargs == allocated_args)
2304 val_args = (struct value **) xrealloc ((char *) val_args,
2305 (allocated_args *= 2)
2306 * sizeof (struct value *));
2308 val_args[nargs] = parse_to_comma_and_eval (&s1);
2316 if (nargs != nargs_wanted)
2317 error (_("Wrong number of arguments for specified format-string"));
2319 /* Now actually print them. */
2320 current_substring = substrings;
2321 for (i = 0; i < nargs; i++)
2323 switch (argclass[i])
2331 tem = value_as_address (val_args[i]);
2333 /* This is a %s argument. Find the length of the string. */
2339 read_memory (tem + j, &c, 1);
2344 /* Copy the string contents into a string inside GDB. */
2345 str = (gdb_byte *) alloca (j + 1);
2347 read_memory (tem, str, j);
2350 fprintf_filtered (stream, current_substring, (char *) str);
2353 case wide_string_arg:
2358 struct gdbarch *gdbarch
2359 = get_type_arch (value_type (val_args[i]));
2360 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2361 struct type *wctype = lookup_typename (current_language, gdbarch,
2362 "wchar_t", NULL, 0);
2363 int wcwidth = TYPE_LENGTH (wctype);
2364 gdb_byte *buf = alloca (wcwidth);
2365 struct obstack output;
2366 struct cleanup *inner_cleanup;
2368 tem = value_as_address (val_args[i]);
2370 /* This is a %s argument. Find the length of the string. */
2371 for (j = 0;; j += wcwidth)
2374 read_memory (tem + j, buf, wcwidth);
2375 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
2379 /* Copy the string contents into a string inside GDB. */
2380 str = (gdb_byte *) alloca (j + wcwidth);
2382 read_memory (tem, str, j);
2383 memset (&str[j], 0, wcwidth);
2385 obstack_init (&output);
2386 inner_cleanup = make_cleanup_obstack_free (&output);
2388 convert_between_encodings (target_wide_charset (gdbarch),
2391 &output, translit_char);
2392 obstack_grow_str0 (&output, "");
2394 fprintf_filtered (stream, current_substring,
2395 obstack_base (&output));
2396 do_cleanups (inner_cleanup);
2401 struct gdbarch *gdbarch
2402 = get_type_arch (value_type (val_args[i]));
2403 struct type *wctype = lookup_typename (current_language, gdbarch,
2404 "wchar_t", NULL, 0);
2405 struct type *valtype;
2406 struct obstack output;
2407 struct cleanup *inner_cleanup;
2408 const gdb_byte *bytes;
2410 valtype = value_type (val_args[i]);
2411 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2412 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2413 error (_("expected wchar_t argument for %%lc"));
2415 bytes = value_contents (val_args[i]);
2417 obstack_init (&output);
2418 inner_cleanup = make_cleanup_obstack_free (&output);
2420 convert_between_encodings (target_wide_charset (gdbarch),
2422 bytes, TYPE_LENGTH (valtype),
2423 TYPE_LENGTH (valtype),
2424 &output, translit_char);
2425 obstack_grow_str0 (&output, "");
2427 fprintf_filtered (stream, current_substring,
2428 obstack_base (&output));
2429 do_cleanups (inner_cleanup);
2434 struct type *type = value_type (val_args[i]);
2438 /* If format string wants a float, unchecked-convert the value
2439 to floating point of the same size. */
2440 type = float_type_from_length (type);
2441 val = unpack_double (type, value_contents (val_args[i]), &inv);
2443 error (_("Invalid floating value found in program."));
2445 fprintf_filtered (stream, current_substring, (double) val);
2448 case long_double_arg:
2449 #ifdef HAVE_LONG_DOUBLE
2451 struct type *type = value_type (val_args[i]);
2455 /* If format string wants a float, unchecked-convert the value
2456 to floating point of the same size. */
2457 type = float_type_from_length (type);
2458 val = unpack_double (type, value_contents (val_args[i]), &inv);
2460 error (_("Invalid floating value found in program."));
2462 fprintf_filtered (stream, current_substring,
2467 error (_("long double not supported in printf"));
2470 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2472 long long val = value_as_long (val_args[i]);
2474 fprintf_filtered (stream, current_substring, val);
2478 error (_("long long not supported in printf"));
2482 int val = value_as_long (val_args[i]);
2484 fprintf_filtered (stream, current_substring, val);
2489 long val = value_as_long (val_args[i]);
2491 fprintf_filtered (stream, current_substring, val);
2495 /* Handles decimal floating values. */
2498 const gdb_byte *param_ptr = value_contents (val_args[i]);
2500 #if defined (PRINTF_HAS_DECFLOAT)
2501 /* If we have native support for Decimal floating
2502 printing, handle it here. */
2503 fprintf_filtered (stream, current_substring, param_ptr);
2506 /* As a workaround until vasprintf has native support for DFP
2507 we convert the DFP values to string and print them using
2508 the %s format specifier. */
2511 int nnull_chars = 0;
2513 /* Parameter data. */
2514 struct type *param_type = value_type (val_args[i]);
2515 unsigned int param_len = TYPE_LENGTH (param_type);
2516 struct gdbarch *gdbarch = get_type_arch (param_type);
2517 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2519 /* DFP output data. */
2520 struct value *dfp_value = NULL;
2524 struct type *dfp_type = NULL;
2525 char decstr[MAX_DECIMAL_STRING];
2527 /* Points to the end of the string so that we can go back
2528 and check for DFP length modifiers. */
2529 eos = current_substring + strlen (current_substring);
2531 /* Look for the float/double format specifier. */
2532 while (*eos != 'f' && *eos != 'e' && *eos != 'E'
2533 && *eos != 'g' && *eos != 'G')
2538 /* Search for the '%' char and extract the size and type of
2539 the output decimal value based on its modifiers
2540 (%Hf, %Df, %DDf). */
2541 while (*--sos != '%')
2546 dfp_type = builtin_type (gdbarch)->builtin_decfloat;
2548 else if (*sos == 'D' && *(sos - 1) == 'D')
2551 dfp_type = builtin_type (gdbarch)->builtin_declong;
2557 dfp_type = builtin_type (gdbarch)->builtin_decdouble;
2561 /* Replace %Hf, %Df and %DDf with %s's. */
2564 /* Go through the whole format string and pull the correct
2565 number of chars back to compensate for the change in the
2566 format specifier. */
2567 while (nnull_chars < nargs - i)
2575 /* Conversion between different DFP types. */
2576 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2577 decimal_convert (param_ptr, param_len, byte_order,
2578 dec, dfp_len, byte_order);
2580 /* If this is a non-trivial conversion, just output 0.
2581 A correct converted value can be displayed by explicitly
2582 casting to a DFP type. */
2583 decimal_from_string (dec, dfp_len, byte_order, "0");
2585 dfp_value = value_from_decfloat (dfp_type, dec);
2587 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2589 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
2591 /* Print the DFP value. */
2592 fprintf_filtered (stream, current_substring, decstr);
2600 /* We avoid the host's %p because pointers are too
2601 likely to be the wrong size. The only interesting
2602 modifier for %p is a width; extract that, and then
2603 handle %p as glibc would: %#x or a literal "(nil)". */
2605 char *p, *fmt, *fmt_p;
2606 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2607 long long val = value_as_long (val_args[i]);
2609 long val = value_as_long (val_args[i]);
2612 fmt = alloca (strlen (current_substring) + 5);
2614 /* Copy up to the leading %. */
2615 p = current_substring;
2619 int is_percent = (*p == '%');
2634 /* Copy any width. */
2635 while (*p >= '0' && *p < '9')
2638 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2641 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2647 fprintf_filtered (stream, fmt, val);
2653 fprintf_filtered (stream, fmt, "(nil)");
2659 internal_error (__FILE__, __LINE__,
2660 _("failed internal consistency check"));
2662 /* Skip to the next substring. */
2663 current_substring += strlen (current_substring) + 1;
2665 /* Print the portion of the format string after the last argument.
2666 Note that this will not include any ordinary %-specs, but it
2667 might include "%%". That is why we use printf_filtered and not
2668 puts_filtered here. Also, we pass a dummy argument because
2669 some platforms have modified GCC to include -Wformat-security
2670 by default, which will warn here if there is no argument. */
2671 fprintf_filtered (stream, last_arg, 0);
2673 do_cleanups (old_cleanups);
2676 /* Implement the "printf" command. */
2679 printf_command (char *arg, int from_tty)
2681 ui_printf (arg, gdb_stdout);
2684 /* Implement the "eval" command. */
2687 eval_command (char *arg, int from_tty)
2689 struct ui_file *ui_out = mem_fileopen ();
2690 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out);
2693 ui_printf (arg, ui_out);
2695 expanded = ui_file_xstrdup (ui_out, NULL);
2696 make_cleanup (xfree, expanded);
2698 execute_command (expanded, from_tty);
2700 do_cleanups (cleanups);
2704 _initialize_printcmd (void)
2706 struct cmd_list_element *c;
2708 current_display_number = -1;
2710 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2712 add_info ("address", address_info,
2713 _("Describe where symbol SYM is stored."));
2715 add_info ("symbol", sym_info, _("\
2716 Describe what symbol is at location ADDR.\n\
2717 Only for symbols with fixed locations (global or static scope)."));
2719 add_com ("x", class_vars, x_command, _("\
2720 Examine memory: x/FMT ADDRESS.\n\
2721 ADDRESS is an expression for the memory address to examine.\n\
2722 FMT is a repeat count followed by a format letter and a size letter.\n\
2723 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2724 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2725 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2726 The specified number of objects of the specified size are printed\n\
2727 according to the format.\n\n\
2728 Defaults for format and size letters are those previously used.\n\
2729 Default count is 1. Default address is following last thing printed\n\
2730 with this command or \"print\"."));
2733 add_com ("whereis", class_vars, whereis_command,
2734 _("Print line number and file of definition of variable."));
2737 add_info ("display", display_info, _("\
2738 Expressions to display when program stops, with code numbers."));
2740 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2741 Cancel some expressions to be displayed when program stops.\n\
2742 Arguments are the code numbers of the expressions to stop displaying.\n\
2743 No argument means cancel all automatic-display expressions.\n\
2744 \"delete display\" has the same effect as this command.\n\
2745 Do \"info display\" to see current list of code numbers."),
2748 add_com ("display", class_vars, display_command, _("\
2749 Print value of expression EXP each time the program stops.\n\
2750 /FMT may be used before EXP as in the \"print\" command.\n\
2751 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2752 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2753 and examining is done as in the \"x\" command.\n\n\
2754 With no argument, display all currently requested auto-display expressions.\n\
2755 Use \"undisplay\" to cancel display requests previously made."));
2757 add_cmd ("display", class_vars, enable_display, _("\
2758 Enable some expressions to be displayed when program stops.\n\
2759 Arguments are the code numbers of the expressions to resume displaying.\n\
2760 No argument means enable all automatic-display expressions.\n\
2761 Do \"info display\" to see current list of code numbers."), &enablelist);
2763 add_cmd ("display", class_vars, disable_display_command, _("\
2764 Disable some expressions to be displayed when program stops.\n\
2765 Arguments are the code numbers of the expressions to stop displaying.\n\
2766 No argument means disable all automatic-display expressions.\n\
2767 Do \"info display\" to see current list of code numbers."), &disablelist);
2769 add_cmd ("display", class_vars, undisplay_command, _("\
2770 Cancel some expressions to be displayed when program stops.\n\
2771 Arguments are the code numbers of the expressions to stop displaying.\n\
2772 No argument means cancel all automatic-display expressions.\n\
2773 Do \"info display\" to see current list of code numbers."), &deletelist);
2775 add_com ("printf", class_vars, printf_command, _("\
2776 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2777 This is useful for formatted output in user-defined commands."));
2779 add_com ("output", class_vars, output_command, _("\
2780 Like \"print\" but don't put in value history and don't print newline.\n\
2781 This is useful in user-defined commands."));
2783 add_prefix_cmd ("set", class_vars, set_command, _("\
2784 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2785 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2786 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2787 with $), a register (a few standard names starting with $), or an actual\n\
2788 variable in the program being debugged. EXP is any valid expression.\n\
2789 Use \"set variable\" for variables with names identical to set subcommands.\n\
2791 With a subcommand, this command modifies parts of the gdb environment.\n\
2792 You can see these environment settings with the \"show\" command."),
2793 &setlist, "set ", 1, &cmdlist);
2795 add_com ("assign", class_vars, set_command, _("\
2796 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2797 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2798 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2799 with $), a register (a few standard names starting with $), or an actual\n\
2800 variable in the program being debugged. EXP is any valid expression.\n\
2801 Use \"set variable\" for variables with names identical to set subcommands.\n\
2802 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2803 You can see these environment settings with the \"show\" command."));
2805 /* "call" is the same as "set", but handy for dbx users to call fns. */
2806 c = add_com ("call", class_vars, call_command, _("\
2807 Call a function in the program.\n\
2808 The argument is the function name and arguments, in the notation of the\n\
2809 current working language. The result is printed and saved in the value\n\
2810 history, if it is not void."));
2811 set_cmd_completer (c, expression_completer);
2813 add_cmd ("variable", class_vars, set_command, _("\
2814 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2815 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2816 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2817 with $), a register (a few standard names starting with $), or an actual\n\
2818 variable in the program being debugged. EXP is any valid expression.\n\
2819 This may usually be abbreviated to simply \"set\"."),
2822 c = add_com ("print", class_vars, print_command, _("\
2823 Print value of expression EXP.\n\
2824 Variables accessible are those of the lexical environment of the selected\n\
2825 stack frame, plus all those whose scope is global or an entire file.\n\
2827 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2828 $$NUM refers to NUM'th value back from the last one.\n\
2829 Names starting with $ refer to registers (with the values they would have\n\
2830 if the program were to return to the stack frame now selected, restoring\n\
2831 all registers saved by frames farther in) or else to debugger\n\
2832 \"convenience\" variables (any such name not a known register).\n\
2833 Use assignment expressions to give values to convenience variables.\n\
2835 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2836 @ is a binary operator for treating consecutive data objects\n\
2837 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2838 element is FOO, whose second element is stored in the space following\n\
2839 where FOO is stored, etc. FOO must be an expression whose value\n\
2840 resides in memory.\n\
2842 EXP may be preceded with /FMT, where FMT is a format letter\n\
2843 but no count or size letter (see \"x\" command)."));
2844 set_cmd_completer (c, expression_completer);
2845 add_com_alias ("p", "print", class_vars, 1);
2847 c = add_com ("inspect", class_vars, inspect_command, _("\
2848 Same as \"print\" command, except that if you are running in the epoch\n\
2849 environment, the value is printed in its own window."));
2850 set_cmd_completer (c, expression_completer);
2852 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2853 &max_symbolic_offset, _("\
2854 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2855 Show the largest offset that will be printed in <symbol+1234> form."), NULL,
2857 show_max_symbolic_offset,
2858 &setprintlist, &showprintlist);
2859 add_setshow_boolean_cmd ("symbol-filename", no_class,
2860 &print_symbol_filename, _("\
2861 Set printing of source filename and line number with <symbol>."), _("\
2862 Show printing of source filename and line number with <symbol>."), NULL,
2864 show_print_symbol_filename,
2865 &setprintlist, &showprintlist);
2867 add_com ("eval", no_class, eval_command, _("\
2868 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2869 a command line, and call it."));