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"
52 #include "cli/cli-utils.h"
55 #include "tui/tui.h" /* For tui_active et al. */
58 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG)
59 # define USE_PRINTF_I64 1
60 # define PRINTF_HAS_LONG_LONG
62 # define USE_PRINTF_I64 0
65 extern int asm_demangle; /* Whether to demangle syms in asm
74 /* True if the value should be printed raw -- that is, bypassing
75 python-based formatters. */
79 /* Last specified output format. */
81 static char last_format = 0;
83 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
85 static char last_size = 'w';
87 /* Default address to examine next, and associated architecture. */
89 static struct gdbarch *next_gdbarch;
90 static CORE_ADDR next_address;
92 /* Number of delay instructions following current disassembled insn. */
94 static int branch_delay_insns;
96 /* Last address examined. */
98 static CORE_ADDR last_examine_address;
100 /* Contents of last address examined.
101 This is not valid past the end of the `x' command! */
103 static struct value *last_examine_value;
105 /* Largest offset between a symbolic value and an address, that will be
106 printed as `0x1234 <symbol+offset>'. */
108 static unsigned int max_symbolic_offset = UINT_MAX;
110 show_max_symbolic_offset (struct ui_file *file, int from_tty,
111 struct cmd_list_element *c, const char *value)
113 fprintf_filtered (file,
114 _("The largest offset that will be "
115 "printed in <symbol+1234> form is %s.\n"),
119 /* Append the source filename and linenumber of the symbol when
120 printing a symbolic value as `<symbol at filename:linenum>' if set. */
121 static int print_symbol_filename = 0;
123 show_print_symbol_filename (struct ui_file *file, int from_tty,
124 struct cmd_list_element *c, const char *value)
126 fprintf_filtered (file, _("Printing of source filename and "
127 "line number with <symbol> is %s.\n"),
131 /* Number of auto-display expression currently being displayed.
132 So that we can disable it if we get an error or a signal within it.
133 -1 when not doing one. */
135 int current_display_number;
139 /* Chain link to next auto-display item. */
140 struct display *next;
142 /* The expression as the user typed it. */
145 /* Expression to be evaluated and displayed. */
146 struct expression *exp;
148 /* Item number of this auto-display item. */
151 /* Display format specified. */
152 struct format_data format;
154 /* Program space associated with `block'. */
155 struct program_space *pspace;
157 /* Innermost block required by this expression when evaluated. */
160 /* Status of this display (enabled or disabled). */
164 /* Chain of expressions whose values should be displayed
165 automatically each time the program stops. */
167 static struct display *display_chain;
169 static int display_number;
171 /* Walk the following statement or block through all displays. */
173 #define ALL_DISPLAYS(B) \
174 for (B = display_chain; B; B = B->next)
176 /* Prototypes for exported functions. */
178 void output_command (char *, int);
180 void _initialize_printcmd (void);
182 /* Prototypes for local functions. */
184 static void do_one_display (struct display *);
187 /* Decode a format specification. *STRING_PTR should point to it.
188 OFORMAT and OSIZE are used as defaults for the format and size
189 if none are given in the format specification.
190 If OSIZE is zero, then the size field of the returned value
191 should be set only if a size is explicitly specified by the
193 The structure returned describes all the data
194 found in the specification. In addition, *STRING_PTR is advanced
195 past the specification and past all whitespace following it. */
197 static struct format_data
198 decode_format (char **string_ptr, int oformat, int osize)
200 struct format_data val;
201 char *p = *string_ptr;
208 if (*p >= '0' && *p <= '9')
209 val.count = atoi (p);
210 while (*p >= '0' && *p <= '9')
213 /* Now process size or format letters that follow. */
217 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
224 else if (*p >= 'a' && *p <= 'z')
230 while (*p == ' ' || *p == '\t')
234 /* Set defaults for format and size if not specified. */
235 if (val.format == '?')
239 /* Neither has been specified. */
240 val.format = oformat;
244 /* If a size is specified, any format makes a reasonable
245 default except 'i'. */
246 val.format = oformat == 'i' ? 'x' : oformat;
248 else if (val.size == '?')
252 /* Pick the appropriate size for an address. This is deferred
253 until do_examine when we know the actual architecture to use.
254 A special size value of 'a' is used to indicate this case. */
255 val.size = osize ? 'a' : osize;
258 /* Floating point has to be word or giantword. */
259 if (osize == 'w' || osize == 'g')
262 /* Default it to giantword if the last used size is not
264 val.size = osize ? 'g' : osize;
267 /* Characters default to one byte. */
268 val.size = osize ? 'b' : osize;
271 /* Display strings with byte size chars unless explicitly
277 /* The default is the size most recently specified. */
284 /* Print value VAL on stream according to OPTIONS.
285 Do not end with a newline.
286 SIZE is the letter for the size of datum being printed.
287 This is used to pad hex numbers so they line up. SIZE is 0
288 for print / output and set for examine. */
291 print_formatted (struct value *val, int size,
292 const struct value_print_options *options,
293 struct ui_file *stream)
295 struct type *type = check_typedef (value_type (val));
296 int len = TYPE_LENGTH (type);
298 if (VALUE_LVAL (val) == lval_memory)
299 next_address = value_address (val) + len;
303 switch (options->format)
307 struct type *elttype = value_type (val);
309 next_address = (value_address (val)
310 + val_print_string (elttype, NULL,
311 value_address (val), -1,
312 stream, options) * len);
317 /* We often wrap here if there are long symbolic names. */
319 next_address = (value_address (val)
320 + gdb_print_insn (get_type_arch (type),
321 value_address (val), stream,
322 &branch_delay_insns));
327 if (options->format == 0 || options->format == 's'
328 || TYPE_CODE (type) == TYPE_CODE_REF
329 || TYPE_CODE (type) == TYPE_CODE_ARRAY
330 || TYPE_CODE (type) == TYPE_CODE_STRING
331 || TYPE_CODE (type) == TYPE_CODE_STRUCT
332 || TYPE_CODE (type) == TYPE_CODE_UNION
333 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
334 value_print (val, stream, options);
336 /* User specified format, so don't look to the type to tell us
338 val_print_scalar_formatted (type,
339 value_contents_for_printing (val),
340 value_embedded_offset (val),
342 options, size, stream);
345 /* Return builtin floating point type of same length as TYPE.
346 If no such type is found, return TYPE itself. */
348 float_type_from_length (struct type *type)
350 struct gdbarch *gdbarch = get_type_arch (type);
351 const struct builtin_type *builtin = builtin_type (gdbarch);
352 unsigned int len = TYPE_LENGTH (type);
354 if (len == TYPE_LENGTH (builtin->builtin_float))
355 type = builtin->builtin_float;
356 else if (len == TYPE_LENGTH (builtin->builtin_double))
357 type = builtin->builtin_double;
358 else if (len == TYPE_LENGTH (builtin->builtin_long_double))
359 type = builtin->builtin_long_double;
364 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
365 according to OPTIONS and SIZE on STREAM. Formats s and i are not
366 supported at this level. */
369 print_scalar_formatted (const void *valaddr, struct type *type,
370 const struct value_print_options *options,
371 int size, struct ui_file *stream)
373 struct gdbarch *gdbarch = get_type_arch (type);
374 LONGEST val_long = 0;
375 unsigned int len = TYPE_LENGTH (type);
376 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
378 /* String printing should go through val_print_scalar_formatted. */
379 gdb_assert (options->format != 's');
381 if (len > sizeof(LONGEST) &&
382 (TYPE_CODE (type) == TYPE_CODE_INT
383 || TYPE_CODE (type) == TYPE_CODE_ENUM))
385 switch (options->format)
388 print_octal_chars (stream, valaddr, len, byte_order);
392 print_decimal_chars (stream, valaddr, len, byte_order);
395 print_binary_chars (stream, valaddr, len, byte_order);
398 print_hex_chars (stream, valaddr, len, byte_order);
401 print_char_chars (stream, type, valaddr, len, byte_order);
408 if (options->format != 'f')
409 val_long = unpack_long (type, valaddr);
411 /* If the value is a pointer, and pointers and addresses are not the
412 same, then at this point, the value's length (in target bytes) is
413 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
414 if (TYPE_CODE (type) == TYPE_CODE_PTR)
415 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT;
417 /* If we are printing it as unsigned, truncate it in case it is actually
418 a negative signed value (e.g. "print/u (short)-1" should print 65535
419 (if shorts are 16 bits) instead of 4294967295). */
420 if (options->format != 'd' || TYPE_UNSIGNED (type))
422 if (len < sizeof (LONGEST))
423 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
426 switch (options->format)
431 /* No size specified, like in print. Print varying # of digits. */
432 print_longest (stream, 'x', 1, val_long);
441 print_longest (stream, size, 1, val_long);
444 error (_("Undefined output size \"%c\"."), size);
449 print_longest (stream, 'd', 1, val_long);
453 print_longest (stream, 'u', 0, val_long);
458 print_longest (stream, 'o', 1, val_long);
460 fprintf_filtered (stream, "0");
465 CORE_ADDR addr = unpack_pointer (type, valaddr);
467 print_address (gdbarch, addr, stream);
473 struct value_print_options opts = *options;
476 if (TYPE_UNSIGNED (type))
477 type = builtin_type (gdbarch)->builtin_true_unsigned_char;
479 type = builtin_type (gdbarch)->builtin_true_char;
481 value_print (value_from_longest (type, val_long), stream, &opts);
486 type = float_type_from_length (type);
487 print_floating (valaddr, type, stream);
491 internal_error (__FILE__, __LINE__,
492 _("failed internal consistency check"));
495 /* Binary; 't' stands for "two". */
497 char bits[8 * (sizeof val_long) + 1];
498 char buf[8 * (sizeof val_long) + 32];
503 width = 8 * (sizeof val_long);
520 error (_("Undefined output size \"%c\"."), size);
526 bits[width] = (val_long & 1) ? '1' : '0';
531 while (*cp && *cp == '0')
536 strncpy (buf, cp, sizeof (bits));
537 fputs_filtered (buf, stream);
542 error (_("Undefined output format \"%c\"."), options->format);
546 /* Specify default address for `x' command.
547 The `info lines' command uses this. */
550 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
552 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
554 next_gdbarch = gdbarch;
557 /* Make address available to the user as $_. */
558 set_internalvar (lookup_internalvar ("_"),
559 value_from_pointer (ptr_type, addr));
562 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
563 after LEADIN. Print nothing if no symbolic name is found nearby.
564 Optionally also print source file and line number, if available.
565 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
566 or to interpret it as a possible C++ name and convert it back to source
567 form. However note that DO_DEMANGLE can be overridden by the specific
568 settings of the demangle and asm_demangle variables. */
571 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
572 struct ui_file *stream,
573 int do_demangle, char *leadin)
576 char *filename = NULL;
581 /* Throw away both name and filename. */
582 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
583 make_cleanup (free_current_contents, &filename);
585 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset,
586 &filename, &line, &unmapped))
588 do_cleanups (cleanup_chain);
592 fputs_filtered (leadin, stream);
594 fputs_filtered ("<*", stream);
596 fputs_filtered ("<", stream);
597 fputs_filtered (name, stream);
599 fprintf_filtered (stream, "+%u", (unsigned int) offset);
601 /* Append source filename and line number if desired. Give specific
602 line # of this addr, if we have it; else line # of the nearest symbol. */
603 if (print_symbol_filename && filename != NULL)
606 fprintf_filtered (stream, " at %s:%d", filename, line);
608 fprintf_filtered (stream, " in %s", filename);
611 fputs_filtered ("*>", stream);
613 fputs_filtered (">", stream);
615 do_cleanups (cleanup_chain);
618 /* Given an address ADDR return all the elements needed to print the
619 address in a symbolic form. NAME can be mangled or not depending
620 on DO_DEMANGLE (and also on the asm_demangle global variable,
621 manipulated via ''set print asm-demangle''). Return 0 in case of
622 success, when all the info in the OUT paramters is valid. Return 1
625 build_address_symbolic (struct gdbarch *gdbarch,
626 CORE_ADDR addr, /* IN */
627 int do_demangle, /* IN */
628 char **name, /* OUT */
629 int *offset, /* OUT */
630 char **filename, /* OUT */
632 int *unmapped) /* OUT */
634 struct minimal_symbol *msymbol;
635 struct symbol *symbol;
636 CORE_ADDR name_location = 0;
637 struct obj_section *section = NULL;
638 char *name_temp = "";
640 /* Let's say it is mapped (not unmapped). */
643 /* Determine if the address is in an overlay, and whether it is
645 if (overlay_debugging)
647 section = find_pc_overlay (addr);
648 if (pc_in_unmapped_range (addr, section))
651 addr = overlay_mapped_address (addr, section);
655 /* First try to find the address in the symbol table, then
656 in the minsyms. Take the closest one. */
658 /* This is defective in the sense that it only finds text symbols. So
659 really this is kind of pointless--we should make sure that the
660 minimal symbols have everything we need (by changing that we could
661 save some memory, but for many debug format--ELF/DWARF or
662 anything/stabs--it would be inconvenient to eliminate those minimal
664 msymbol = lookup_minimal_symbol_by_pc_section (addr, section);
665 symbol = find_pc_sect_function (addr, section);
669 /* If this is a function (i.e. a code address), strip out any
670 non-address bits. For instance, display a pointer to the
671 first instruction of a Thumb function as <function>; the
672 second instruction will be <function+2>, even though the
673 pointer is <function+3>. This matches the ISA behavior. */
674 addr = gdbarch_addr_bits_remove (gdbarch, addr);
676 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
677 if (do_demangle || asm_demangle)
678 name_temp = SYMBOL_PRINT_NAME (symbol);
680 name_temp = SYMBOL_LINKAGE_NAME (symbol);
685 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
687 /* The msymbol is closer to the address than the symbol;
688 use the msymbol instead. */
690 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
691 if (do_demangle || asm_demangle)
692 name_temp = SYMBOL_PRINT_NAME (msymbol);
694 name_temp = SYMBOL_LINKAGE_NAME (msymbol);
697 if (symbol == NULL && msymbol == NULL)
700 /* If the nearest symbol is too far away, don't print anything symbolic. */
702 /* For when CORE_ADDR is larger than unsigned int, we do math in
703 CORE_ADDR. But when we detect unsigned wraparound in the
704 CORE_ADDR math, we ignore this test and print the offset,
705 because addr+max_symbolic_offset has wrapped through the end
706 of the address space back to the beginning, giving bogus comparison. */
707 if (addr > name_location + max_symbolic_offset
708 && name_location + max_symbolic_offset > name_location)
711 *offset = addr - name_location;
713 *name = xstrdup (name_temp);
715 if (print_symbol_filename)
717 struct symtab_and_line sal;
719 sal = find_pc_sect_line (addr, section, 0);
723 *filename = xstrdup (sal.symtab->filename);
731 /* Print address ADDR symbolically on STREAM.
732 First print it as a number. Then perhaps print
733 <SYMBOL + OFFSET> after the number. */
736 print_address (struct gdbarch *gdbarch,
737 CORE_ADDR addr, struct ui_file *stream)
739 fputs_filtered (paddress (gdbarch, addr), stream);
740 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " ");
743 /* Return a prefix for instruction address:
744 "=> " for current instruction, else " ". */
747 pc_prefix (CORE_ADDR addr)
749 if (has_stack_frames ())
751 struct frame_info *frame;
754 frame = get_selected_frame (NULL);
755 pc = get_frame_pc (frame);
763 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
764 controls whether to print the symbolic name "raw" or demangled.
765 Global setting "addressprint" controls whether to print hex address
769 print_address_demangle (struct gdbarch *gdbarch, CORE_ADDR addr,
770 struct ui_file *stream, int do_demangle)
772 struct value_print_options opts;
774 get_user_print_options (&opts);
777 fprintf_filtered (stream, "0");
779 else if (opts.addressprint)
781 fputs_filtered (paddress (gdbarch, addr), stream);
782 print_address_symbolic (gdbarch, addr, stream, do_demangle, " ");
786 print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
791 /* Examine data at address ADDR in format FMT.
792 Fetch it from memory and print on gdb_stdout. */
795 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr)
800 struct type *val_type = NULL;
803 struct value_print_options opts;
808 next_gdbarch = gdbarch;
811 /* Instruction format implies fetch single bytes
812 regardless of the specified size.
813 The case of strings is handled in decode_format, only explicit
814 size operator are not changed to 'b'. */
820 /* Pick the appropriate size for an address. */
821 if (gdbarch_ptr_bit (next_gdbarch) == 64)
823 else if (gdbarch_ptr_bit (next_gdbarch) == 32)
825 else if (gdbarch_ptr_bit (next_gdbarch) == 16)
828 /* Bad value for gdbarch_ptr_bit. */
829 internal_error (__FILE__, __LINE__,
830 _("failed internal consistency check"));
834 val_type = builtin_type (next_gdbarch)->builtin_int8;
835 else if (size == 'h')
836 val_type = builtin_type (next_gdbarch)->builtin_int16;
837 else if (size == 'w')
838 val_type = builtin_type (next_gdbarch)->builtin_int32;
839 else if (size == 'g')
840 val_type = builtin_type (next_gdbarch)->builtin_int64;
844 struct type *char_type = NULL;
846 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
847 if type is not found. */
849 char_type = builtin_type (next_gdbarch)->builtin_char16;
850 else if (size == 'w')
851 char_type = builtin_type (next_gdbarch)->builtin_char32;
853 val_type = char_type;
856 if (size != '\0' && size != 'b')
857 warning (_("Unable to display strings with "
858 "size '%c', using 'b' instead."), size);
860 val_type = builtin_type (next_gdbarch)->builtin_int8;
869 if (format == 's' || format == 'i')
872 get_formatted_print_options (&opts, format);
874 /* Print as many objects as specified in COUNT, at most maxelts per line,
875 with the address of the next one at the start of each line. */
881 fputs_filtered (pc_prefix (next_address), gdb_stdout);
882 print_address (next_gdbarch, next_address, gdb_stdout);
883 printf_filtered (":");
888 printf_filtered ("\t");
889 /* Note that print_formatted sets next_address for the next
891 last_examine_address = next_address;
893 if (last_examine_value)
894 value_free (last_examine_value);
896 /* The value to be displayed is not fetched greedily.
897 Instead, to avoid the possibility of a fetched value not
898 being used, its retrieval is delayed until the print code
899 uses it. When examining an instruction stream, the
900 disassembler will perform its own memory fetch using just
901 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
902 the disassembler be modified so that LAST_EXAMINE_VALUE
903 is left with the byte sequence from the last complete
904 instruction fetched from memory? */
905 last_examine_value = value_at_lazy (val_type, next_address);
907 if (last_examine_value)
908 release_value (last_examine_value);
910 print_formatted (last_examine_value, size, &opts, gdb_stdout);
912 /* Display any branch delay slots following the final insn. */
913 if (format == 'i' && count == 1)
914 count += branch_delay_insns;
916 printf_filtered ("\n");
917 gdb_flush (gdb_stdout);
922 validate_format (struct format_data fmt, char *cmdname)
925 error (_("Size letters are meaningless in \"%s\" command."), cmdname);
927 error (_("Item count other than 1 is meaningless in \"%s\" command."),
929 if (fmt.format == 'i')
930 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
931 fmt.format, cmdname);
934 /* Evaluate string EXP as an expression in the current language and
935 print the resulting value. EXP may contain a format specifier as the
936 first argument ("/x myvar" for example, to print myvar in hex). */
939 print_command_1 (char *exp, int inspect, int voidprint)
941 struct expression *expr;
942 struct cleanup *old_chain = 0;
945 struct format_data fmt;
948 if (exp && *exp == '/')
951 fmt = decode_format (&exp, last_format, 0);
952 validate_format (fmt, "print");
953 last_format = format = fmt.format;
965 expr = parse_expression (exp);
966 old_chain = make_cleanup (free_current_contents, &expr);
968 val = evaluate_expression (expr);
971 val = access_value_history (0);
973 if (voidprint || (val && value_type (val) &&
974 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
976 struct value_print_options opts;
977 int histindex = record_latest_value (val);
980 annotate_value_history_begin (histindex, value_type (val));
982 annotate_value_begin (value_type (val));
985 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
987 else if (histindex >= 0)
988 printf_filtered ("$%d = ", histindex);
991 annotate_value_history_value ();
993 get_formatted_print_options (&opts, format);
994 opts.inspect_it = inspect;
997 print_formatted (val, fmt.size, &opts, gdb_stdout);
998 printf_filtered ("\n");
1001 annotate_value_history_end ();
1003 annotate_value_end ();
1006 printf_unfiltered ("\") )\030");
1010 do_cleanups (old_chain);
1014 print_command (char *exp, int from_tty)
1016 print_command_1 (exp, 0, 1);
1019 /* Same as print, except in epoch, it gets its own window. */
1021 inspect_command (char *exp, int from_tty)
1023 extern int epoch_interface;
1025 print_command_1 (exp, epoch_interface, 1);
1028 /* Same as print, except it doesn't print void results. */
1030 call_command (char *exp, int from_tty)
1032 print_command_1 (exp, 0, 0);
1036 output_command (char *exp, int from_tty)
1038 struct expression *expr;
1039 struct cleanup *old_chain;
1042 struct format_data fmt;
1043 struct value_print_options opts;
1048 if (exp && *exp == '/')
1051 fmt = decode_format (&exp, 0, 0);
1052 validate_format (fmt, "output");
1053 format = fmt.format;
1056 expr = parse_expression (exp);
1057 old_chain = make_cleanup (free_current_contents, &expr);
1059 val = evaluate_expression (expr);
1061 annotate_value_begin (value_type (val));
1063 get_formatted_print_options (&opts, format);
1065 print_formatted (val, fmt.size, &opts, gdb_stdout);
1067 annotate_value_end ();
1070 gdb_flush (gdb_stdout);
1072 do_cleanups (old_chain);
1076 set_command (char *exp, int from_tty)
1078 struct expression *expr = parse_expression (exp);
1079 struct cleanup *old_chain =
1080 make_cleanup (free_current_contents, &expr);
1082 evaluate_expression (expr);
1083 do_cleanups (old_chain);
1087 sym_info (char *arg, int from_tty)
1089 struct minimal_symbol *msymbol;
1090 struct objfile *objfile;
1091 struct obj_section *osect;
1092 CORE_ADDR addr, sect_addr;
1094 unsigned int offset;
1097 error_no_arg (_("address"));
1099 addr = parse_and_eval_address (arg);
1100 ALL_OBJSECTIONS (objfile, osect)
1102 /* Only process each object file once, even if there's a separate
1104 if (objfile->separate_debug_objfile_backlink)
1107 sect_addr = overlay_mapped_address (addr, osect);
1109 if (obj_section_addr (osect) <= sect_addr
1110 && sect_addr < obj_section_endaddr (osect)
1111 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect)))
1113 const char *obj_name, *mapped, *sec_name, *msym_name;
1115 struct cleanup *old_chain;
1118 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1119 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
1120 sec_name = osect->the_bfd_section->name;
1121 msym_name = SYMBOL_PRINT_NAME (msymbol);
1123 /* Don't print the offset if it is zero.
1124 We assume there's no need to handle i18n of "sym + offset". */
1126 loc_string = xstrprintf ("%s + %u", msym_name, offset);
1128 loc_string = xstrprintf ("%s", msym_name);
1130 /* Use a cleanup to free loc_string in case the user quits
1131 a pagination request inside printf_filtered. */
1132 old_chain = make_cleanup (xfree, loc_string);
1134 gdb_assert (osect->objfile && osect->objfile->name);
1135 obj_name = osect->objfile->name;
1137 if (MULTI_OBJFILE_P ())
1138 if (pc_in_unmapped_range (addr, osect))
1139 if (section_is_overlay (osect))
1140 printf_filtered (_("%s in load address range of "
1141 "%s overlay section %s of %s\n"),
1142 loc_string, mapped, sec_name, obj_name);
1144 printf_filtered (_("%s in load address range of "
1145 "section %s of %s\n"),
1146 loc_string, sec_name, obj_name);
1148 if (section_is_overlay (osect))
1149 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1150 loc_string, mapped, sec_name, obj_name);
1152 printf_filtered (_("%s in section %s of %s\n"),
1153 loc_string, sec_name, obj_name);
1155 if (pc_in_unmapped_range (addr, osect))
1156 if (section_is_overlay (osect))
1157 printf_filtered (_("%s in load address range of %s overlay "
1159 loc_string, mapped, sec_name);
1161 printf_filtered (_("%s in load address range of section %s\n"),
1162 loc_string, sec_name);
1164 if (section_is_overlay (osect))
1165 printf_filtered (_("%s in %s overlay section %s\n"),
1166 loc_string, mapped, sec_name);
1168 printf_filtered (_("%s in section %s\n"),
1169 loc_string, sec_name);
1171 do_cleanups (old_chain);
1175 printf_filtered (_("No symbol matches %s.\n"), arg);
1179 address_info (char *exp, int from_tty)
1181 struct gdbarch *gdbarch;
1184 struct minimal_symbol *msymbol;
1186 struct obj_section *section;
1187 CORE_ADDR load_addr, context_pc = 0;
1188 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
1189 if exp is a field of `this'. */
1192 error (_("Argument required."));
1194 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
1195 &is_a_field_of_this);
1198 if (is_a_field_of_this)
1200 printf_filtered ("Symbol \"");
1201 fprintf_symbol_filtered (gdb_stdout, exp,
1202 current_language->la_language, DMGL_ANSI);
1203 printf_filtered ("\" is a field of the local class variable ");
1204 if (current_language->la_language == language_objc)
1205 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1207 printf_filtered ("`this'\n");
1211 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1213 if (msymbol != NULL)
1215 gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
1216 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1218 printf_filtered ("Symbol \"");
1219 fprintf_symbol_filtered (gdb_stdout, exp,
1220 current_language->la_language, DMGL_ANSI);
1221 printf_filtered ("\" is at ");
1222 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1223 printf_filtered (" in a file compiled without debugging");
1224 section = SYMBOL_OBJ_SECTION (msymbol);
1225 if (section_is_overlay (section))
1227 load_addr = overlay_unmapped_address (load_addr, section);
1228 printf_filtered (",\n -- loaded at ");
1229 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1230 printf_filtered (" in overlay section %s",
1231 section->the_bfd_section->name);
1233 printf_filtered (".\n");
1236 error (_("No symbol \"%s\" in current context."), exp);
1240 printf_filtered ("Symbol \"");
1241 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1242 current_language->la_language, DMGL_ANSI);
1243 printf_filtered ("\" is ");
1244 val = SYMBOL_VALUE (sym);
1245 section = SYMBOL_OBJ_SECTION (sym);
1246 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1248 switch (SYMBOL_CLASS (sym))
1251 case LOC_CONST_BYTES:
1252 printf_filtered ("constant");
1256 printf_filtered ("a label at address ");
1257 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1258 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1259 if (section_is_overlay (section))
1261 load_addr = overlay_unmapped_address (load_addr, section);
1262 printf_filtered (",\n -- loaded at ");
1263 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1264 printf_filtered (" in overlay section %s",
1265 section->the_bfd_section->name);
1270 /* FIXME: cagney/2004-01-26: It should be possible to
1271 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1272 Unfortunately DWARF 2 stores the frame-base (instead of the
1273 function) location in a function's symbol. Oops! For the
1274 moment enable this when/where applicable. */
1275 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
1280 /* GDBARCH is the architecture associated with the objfile the symbol
1281 is defined in; the target architecture may be different, and may
1282 provide additional registers. However, we do not know the target
1283 architecture at this point. We assume the objfile architecture
1284 will contain all the standard registers that occur in debug info
1286 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1288 if (SYMBOL_IS_ARGUMENT (sym))
1289 printf_filtered (_("an argument in register %s"),
1290 gdbarch_register_name (gdbarch, regno));
1292 printf_filtered (_("a variable in register %s"),
1293 gdbarch_register_name (gdbarch, regno));
1297 printf_filtered (_("static storage at address "));
1298 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1299 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1300 if (section_is_overlay (section))
1302 load_addr = overlay_unmapped_address (load_addr, section);
1303 printf_filtered (_(",\n -- loaded at "));
1304 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1305 printf_filtered (_(" in overlay section %s"),
1306 section->the_bfd_section->name);
1310 case LOC_REGPARM_ADDR:
1311 /* Note comment at LOC_REGISTER. */
1312 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1313 printf_filtered (_("address of an argument in register %s"),
1314 gdbarch_register_name (gdbarch, regno));
1318 printf_filtered (_("an argument at offset %ld"), val);
1322 printf_filtered (_("a local variable at frame offset %ld"), val);
1326 printf_filtered (_("a reference argument at offset %ld"), val);
1330 printf_filtered (_("a typedef"));
1334 printf_filtered (_("a function at address "));
1335 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1336 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1337 if (section_is_overlay (section))
1339 load_addr = overlay_unmapped_address (load_addr, section);
1340 printf_filtered (_(",\n -- loaded at "));
1341 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1342 printf_filtered (_(" in overlay section %s"),
1343 section->the_bfd_section->name);
1347 case LOC_UNRESOLVED:
1349 struct minimal_symbol *msym;
1351 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
1353 printf_filtered ("unresolved");
1356 section = SYMBOL_OBJ_SECTION (msym);
1357 load_addr = SYMBOL_VALUE_ADDRESS (msym);
1360 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1361 printf_filtered (_("a thread-local variable at offset %s "
1362 "in the thread-local storage for `%s'"),
1363 paddress (gdbarch, load_addr),
1364 section->objfile->name);
1367 printf_filtered (_("static storage at address "));
1368 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1369 if (section_is_overlay (section))
1371 load_addr = overlay_unmapped_address (load_addr, section);
1372 printf_filtered (_(",\n -- loaded at "));
1373 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1374 printf_filtered (_(" in overlay section %s"),
1375 section->the_bfd_section->name);
1382 case LOC_OPTIMIZED_OUT:
1383 printf_filtered (_("optimized out"));
1387 printf_filtered (_("of unknown (botched) type"));
1390 printf_filtered (".\n");
1395 x_command (char *exp, int from_tty)
1397 struct expression *expr;
1398 struct format_data fmt;
1399 struct cleanup *old_chain;
1402 fmt.format = last_format ? last_format : 'x';
1403 fmt.size = last_size;
1407 if (exp && *exp == '/')
1410 fmt = decode_format (&exp, last_format, last_size);
1413 /* If we have an expression, evaluate it and use it as the address. */
1415 if (exp != 0 && *exp != 0)
1417 expr = parse_expression (exp);
1418 /* Cause expression not to be there any more if this command is
1419 repeated with Newline. But don't clobber a user-defined
1420 command's definition. */
1423 old_chain = make_cleanup (free_current_contents, &expr);
1424 val = evaluate_expression (expr);
1425 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1426 val = coerce_ref (val);
1427 /* In rvalue contexts, such as this, functions are coerced into
1428 pointers to functions. This makes "x/i main" work. */
1429 if (/* last_format == 'i' && */
1430 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1431 && VALUE_LVAL (val) == lval_memory)
1432 next_address = value_address (val);
1434 next_address = value_as_address (val);
1436 next_gdbarch = expr->gdbarch;
1437 do_cleanups (old_chain);
1441 error_no_arg (_("starting display address"));
1443 do_examine (fmt, next_gdbarch, next_address);
1445 /* If the examine succeeds, we remember its size and format for next
1446 time. Set last_size to 'b' for strings. */
1447 if (fmt.format == 's')
1450 last_size = fmt.size;
1451 last_format = fmt.format;
1453 /* Set a couple of internal variables if appropriate. */
1454 if (last_examine_value)
1456 /* Make last address examined available to the user as $_. Use
1457 the correct pointer type. */
1458 struct type *pointer_type
1459 = lookup_pointer_type (value_type (last_examine_value));
1460 set_internalvar (lookup_internalvar ("_"),
1461 value_from_pointer (pointer_type,
1462 last_examine_address));
1464 /* Make contents of last address examined available to the user
1465 as $__. If the last value has not been fetched from memory
1466 then don't fetch it now; instead mark it by voiding the $__
1468 if (value_lazy (last_examine_value))
1469 clear_internalvar (lookup_internalvar ("__"));
1471 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1476 /* Add an expression to the auto-display chain.
1477 Specify the expression. */
1480 display_command (char *exp, int from_tty)
1482 struct format_data fmt;
1483 struct expression *expr;
1484 struct display *new;
1488 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1490 if (tui_active && exp != NULL && *exp == '$')
1491 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1505 fmt = decode_format (&exp, 0, 0);
1506 if (fmt.size && fmt.format == 0)
1508 if (fmt.format == 'i' || fmt.format == 's')
1519 innermost_block = NULL;
1520 expr = parse_expression (exp);
1522 new = (struct display *) xmalloc (sizeof (struct display));
1524 new->exp_string = xstrdup (exp);
1526 new->block = innermost_block;
1527 new->pspace = current_program_space;
1528 new->next = display_chain;
1529 new->number = ++display_number;
1532 display_chain = new;
1534 if (from_tty && target_has_execution)
1535 do_one_display (new);
1542 free_display (struct display *d)
1544 xfree (d->exp_string);
1549 /* Clear out the display_chain. Done when new symtabs are loaded,
1550 since this invalidates the types stored in many expressions. */
1553 clear_displays (void)
1557 while ((d = display_chain) != NULL)
1559 display_chain = d->next;
1564 /* Delete the auto-display DISPLAY. */
1567 delete_display (struct display *display)
1571 gdb_assert (display != NULL);
1573 if (display_chain == display)
1574 display_chain = display->next;
1577 if (d->next == display)
1579 d->next = display->next;
1583 free_display (display);
1586 /* Delete some values from the auto-display chain.
1587 Specify the element numbers. */
1590 undisplay_command (char *args, int from_tty)
1593 struct get_number_or_range_state state;
1597 if (query (_("Delete all auto-display expressions? ")))
1603 init_number_or_range (&state, args);
1604 while (!state.finished)
1606 char *p = state.string;
1608 num = get_number_or_range (&state);
1610 warning (_("bad display number at or near '%s'"), p);
1616 if (d->number == num)
1619 printf_unfiltered (_("No display number %d.\n"), num);
1627 /* Display a single auto-display.
1628 Do nothing if the display cannot be printed in the current context,
1629 or if the display is disabled. */
1632 do_one_display (struct display *d)
1634 int within_current_scope;
1636 if (d->enabled_p == 0)
1639 /* The expression carries the architecture that was used at parse time.
1640 This is a problem if the expression depends on architecture features
1641 (e.g. register numbers), and the current architecture is now different.
1642 For example, a display statement like "display/i $pc" is expected to
1643 display the PC register of the current architecture, not the arch at
1644 the time the display command was given. Therefore, we re-parse the
1645 expression if the current architecture has changed. */
1646 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ())
1655 volatile struct gdb_exception ex;
1657 TRY_CATCH (ex, RETURN_MASK_ALL)
1659 innermost_block = NULL;
1660 d->exp = parse_expression (d->exp_string);
1661 d->block = innermost_block;
1665 /* Can't re-parse the expression. Disable this display item. */
1667 warning (_("Unable to display \"%s\": %s"),
1668 d->exp_string, ex.message);
1675 if (d->pspace == current_program_space)
1676 within_current_scope = contained_in (get_selected_block (0), d->block);
1678 within_current_scope = 0;
1681 within_current_scope = 1;
1682 if (!within_current_scope)
1685 current_display_number = d->number;
1687 annotate_display_begin ();
1688 printf_filtered ("%d", d->number);
1689 annotate_display_number_end ();
1690 printf_filtered (": ");
1696 annotate_display_format ();
1698 printf_filtered ("x/");
1699 if (d->format.count != 1)
1700 printf_filtered ("%d", d->format.count);
1701 printf_filtered ("%c", d->format.format);
1702 if (d->format.format != 'i' && d->format.format != 's')
1703 printf_filtered ("%c", d->format.size);
1704 printf_filtered (" ");
1706 annotate_display_expression ();
1708 puts_filtered (d->exp_string);
1709 annotate_display_expression_end ();
1711 if (d->format.count != 1 || d->format.format == 'i')
1712 printf_filtered ("\n");
1714 printf_filtered (" ");
1716 val = evaluate_expression (d->exp);
1717 addr = value_as_address (val);
1718 if (d->format.format == 'i')
1719 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
1721 annotate_display_value ();
1723 do_examine (d->format, d->exp->gdbarch, addr);
1727 struct value_print_options opts;
1729 annotate_display_format ();
1731 if (d->format.format)
1732 printf_filtered ("/%c ", d->format.format);
1734 annotate_display_expression ();
1736 puts_filtered (d->exp_string);
1737 annotate_display_expression_end ();
1739 printf_filtered (" = ");
1741 annotate_display_expression ();
1743 get_formatted_print_options (&opts, d->format.format);
1744 opts.raw = d->format.raw;
1745 print_formatted (evaluate_expression (d->exp),
1746 d->format.size, &opts, gdb_stdout);
1747 printf_filtered ("\n");
1750 annotate_display_end ();
1752 gdb_flush (gdb_stdout);
1753 current_display_number = -1;
1756 /* Display all of the values on the auto-display chain which can be
1757 evaluated in the current scope. */
1764 for (d = display_chain; d; d = d->next)
1768 /* Delete the auto-display which we were in the process of displaying.
1769 This is done when there is an error or a signal. */
1772 disable_display (int num)
1776 for (d = display_chain; d; d = d->next)
1777 if (d->number == num)
1782 printf_unfiltered (_("No display number %d.\n"), num);
1786 disable_current_display (void)
1788 if (current_display_number >= 0)
1790 disable_display (current_display_number);
1791 fprintf_unfiltered (gdb_stderr,
1792 _("Disabling display %d to "
1793 "avoid infinite recursion.\n"),
1794 current_display_number);
1796 current_display_number = -1;
1800 display_info (char *ignore, int from_tty)
1805 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1807 printf_filtered (_("Auto-display expressions now in effect:\n\
1808 Num Enb Expression\n"));
1810 for (d = display_chain; d; d = d->next)
1812 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1814 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1816 else if (d->format.format)
1817 printf_filtered ("/%c ", d->format.format);
1818 puts_filtered (d->exp_string);
1819 if (d->block && !contained_in (get_selected_block (0), d->block))
1820 printf_filtered (_(" (cannot be evaluated in the current context)"));
1821 printf_filtered ("\n");
1822 gdb_flush (gdb_stdout);
1827 enable_display (char *args, int from_tty)
1836 for (d = display_chain; d; d = d->next)
1843 while (*p1 >= '0' && *p1 <= '9')
1845 if (*p1 && *p1 != ' ' && *p1 != '\t')
1846 error (_("Arguments must be display numbers."));
1850 for (d = display_chain; d; d = d->next)
1851 if (d->number == num)
1856 printf_unfiltered (_("No display number %d.\n"), num);
1859 while (*p == ' ' || *p == '\t')
1865 disable_display_command (char *args, int from_tty)
1873 for (d = display_chain; d; d = d->next)
1880 while (*p1 >= '0' && *p1 <= '9')
1882 if (*p1 && *p1 != ' ' && *p1 != '\t')
1883 error (_("Arguments must be display numbers."));
1885 disable_display (atoi (p));
1888 while (*p == ' ' || *p == '\t')
1893 /* display_chain items point to blocks and expressions. Some expressions in
1894 turn may point to symbols.
1895 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1896 obstack_free'd when a shared library is unloaded.
1897 Clear pointers that are about to become dangling.
1898 Both .exp and .block fields will be restored next time we need to display
1899 an item by re-parsing .exp_string field in the new execution context. */
1902 clear_dangling_display_expressions (struct so_list *solib)
1904 struct objfile *objfile = solib->objfile;
1907 /* With no symbol file we cannot have a block or expression from it. */
1908 if (objfile == NULL)
1910 if (objfile->separate_debug_objfile_backlink)
1911 objfile = objfile->separate_debug_objfile_backlink;
1912 gdb_assert (objfile->pspace == solib->pspace);
1914 for (d = display_chain; d != NULL; d = d->next)
1916 if (d->pspace != solib->pspace)
1919 if (lookup_objfile_from_block (d->block) == objfile
1920 || (d->exp && exp_uses_objfile (d->exp, objfile)))
1930 /* Print the value in stack frame FRAME of a variable specified by a
1931 struct symbol. NAME is the name to print; if NULL then VAR's print
1932 name will be used. STREAM is the ui_file on which to print the
1933 value. INDENT specifies the number of indent levels to print
1934 before printing the variable name. */
1937 print_variable_and_value (const char *name, struct symbol *var,
1938 struct frame_info *frame,
1939 struct ui_file *stream, int indent)
1941 volatile struct gdb_exception except;
1944 name = SYMBOL_PRINT_NAME (var);
1946 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name);
1947 TRY_CATCH (except, RETURN_MASK_ERROR)
1950 struct value_print_options opts;
1952 val = read_var_value (var, frame);
1953 get_user_print_options (&opts);
1954 common_val_print (val, stream, indent, &opts, current_language);
1956 if (except.reason < 0)
1957 fprintf_filtered(stream, "<error reading variable %s (%s)>", name,
1959 fprintf_filtered (stream, "\n");
1962 /* printf "printf format string" ARG to STREAM. */
1965 ui_printf (char *arg, struct ui_file *stream)
1969 char *string = NULL;
1970 struct value **val_args;
1972 char *current_substring;
1974 int allocated_args = 20;
1975 struct cleanup *old_cleanups;
1977 val_args = xmalloc (allocated_args * sizeof (struct value *));
1978 old_cleanups = make_cleanup (free_current_contents, &val_args);
1981 error_no_arg (_("format-control string and values to print"));
1983 s = skip_spaces (s);
1985 /* A format string should follow, enveloped in double quotes. */
1987 error (_("Bad format string, missing '\"'."));
1989 /* Parse the format-control string and copy it into the string STRING,
1990 processing some kinds of escape sequence. */
1992 f = string = (char *) alloca (strlen (s) + 1);
2000 error (_("Bad format string, non-terminated '\"'."));
2033 /* ??? TODO: handle other escape sequences. */
2034 error (_("Unrecognized escape character \\%c in format string."),
2044 /* Skip over " and following space and comma. */
2047 s = skip_spaces (s);
2049 if (*s != ',' && *s != 0)
2050 error (_("Invalid argument syntax"));
2054 s = skip_spaces (s);
2056 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2057 substrings = alloca (strlen (string) * 2);
2058 current_substring = substrings;
2061 /* Now scan the string for %-specs and see what kinds of args they want.
2062 argclass[I] classifies the %-specs so we can give printf_filtered
2063 something of the right size. */
2067 int_arg, long_arg, long_long_arg, ptr_arg,
2068 string_arg, wide_string_arg, wide_char_arg,
2069 double_arg, long_double_arg, decfloat_arg
2071 enum argclass *argclass;
2072 enum argclass this_argclass;
2077 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass);
2084 int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0;
2085 int seen_space = 0, seen_plus = 0;
2086 int seen_big_l = 0, seen_h = 0, seen_big_h = 0;
2087 int seen_big_d = 0, seen_double_big_d = 0;
2090 /* Check the validity of the format specifier, and work
2091 out what argument it expects. We only accept C89
2092 format strings, with the exception of long long (which
2093 we autoconf for). */
2095 /* Skip over "%%". */
2102 /* The first part of a format specifier is a set of flag
2104 while (strchr ("0-+ #", *f))
2117 /* The next part of a format specifier is a width. */
2118 while (strchr ("0123456789", *f))
2121 /* The next part of a format specifier is a precision. */
2126 while (strchr ("0123456789", *f))
2130 /* The next part of a format specifier is a length modifier. */
2151 /* Decimal32 modifier. */
2157 /* Decimal64 and Decimal128 modifiers. */
2162 /* Check for a Decimal128. */
2166 seen_double_big_d = 1;
2182 if (seen_space || seen_plus)
2189 this_argclass = int_arg;
2190 else if (lcount == 1)
2191 this_argclass = long_arg;
2193 this_argclass = long_long_arg;
2200 this_argclass = lcount == 0 ? int_arg : wide_char_arg;
2201 if (lcount > 1 || seen_h || seen_big_l)
2203 if (seen_prec || seen_zero || seen_space || seen_plus)
2208 this_argclass = ptr_arg;
2209 if (lcount || seen_h || seen_big_l)
2211 if (seen_prec || seen_zero || seen_space || seen_plus)
2216 this_argclass = lcount == 0 ? string_arg : wide_string_arg;
2217 if (lcount > 1 || seen_h || seen_big_l)
2219 if (seen_zero || seen_space || seen_plus)
2228 if (seen_big_h || seen_big_d || seen_double_big_d)
2229 this_argclass = decfloat_arg;
2230 else if (seen_big_l)
2231 this_argclass = long_double_arg;
2233 this_argclass = double_arg;
2235 if (lcount || seen_h)
2240 error (_("`*' not supported for precision or width in printf"));
2243 error (_("Format specifier `n' not supported in printf"));
2246 error (_("Incomplete format specifier at end of format string"));
2249 error (_("Unrecognized format specifier '%c' in printf"), *f);
2253 error (_("Inappropriate modifiers to "
2254 "format specifier '%c' in printf"),
2259 if (lcount > 1 && USE_PRINTF_I64)
2261 /* Windows' printf does support long long, but not the usual way.
2262 Convert %lld to %I64d. */
2263 int length_before_ll = f - last_arg - 1 - lcount;
2265 strncpy (current_substring, last_arg, length_before_ll);
2266 strcpy (current_substring + length_before_ll, "I64");
2267 current_substring[length_before_ll + 3] =
2268 last_arg[length_before_ll + lcount];
2269 current_substring += length_before_ll + 4;
2271 else if (this_argclass == wide_string_arg
2272 || this_argclass == wide_char_arg)
2274 /* Convert %ls or %lc to %s. */
2275 int length_before_ls = f - last_arg - 2;
2277 strncpy (current_substring, last_arg, length_before_ls);
2278 strcpy (current_substring + length_before_ls, "s");
2279 current_substring += length_before_ls + 2;
2283 strncpy (current_substring, last_arg, f - last_arg);
2284 current_substring += f - last_arg;
2286 *current_substring++ = '\0';
2288 argclass[nargs_wanted++] = this_argclass;
2291 /* Now, parse all arguments and evaluate them.
2292 Store the VALUEs in VAL_ARGS. */
2298 if (nargs == allocated_args)
2299 val_args = (struct value **) xrealloc ((char *) val_args,
2300 (allocated_args *= 2)
2301 * sizeof (struct value *));
2303 val_args[nargs] = parse_to_comma_and_eval (&s1);
2311 if (nargs != nargs_wanted)
2312 error (_("Wrong number of arguments for specified format-string"));
2314 /* Now actually print them. */
2315 current_substring = substrings;
2316 for (i = 0; i < nargs; i++)
2318 switch (argclass[i])
2326 tem = value_as_address (val_args[i]);
2328 /* This is a %s argument. Find the length of the string. */
2334 read_memory (tem + j, &c, 1);
2339 /* Copy the string contents into a string inside GDB. */
2340 str = (gdb_byte *) alloca (j + 1);
2342 read_memory (tem, str, j);
2345 fprintf_filtered (stream, current_substring, (char *) str);
2348 case wide_string_arg:
2353 struct gdbarch *gdbarch
2354 = get_type_arch (value_type (val_args[i]));
2355 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2356 struct type *wctype = lookup_typename (current_language, gdbarch,
2357 "wchar_t", NULL, 0);
2358 int wcwidth = TYPE_LENGTH (wctype);
2359 gdb_byte *buf = alloca (wcwidth);
2360 struct obstack output;
2361 struct cleanup *inner_cleanup;
2363 tem = value_as_address (val_args[i]);
2365 /* This is a %s argument. Find the length of the string. */
2366 for (j = 0;; j += wcwidth)
2369 read_memory (tem + j, buf, wcwidth);
2370 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
2374 /* Copy the string contents into a string inside GDB. */
2375 str = (gdb_byte *) alloca (j + wcwidth);
2377 read_memory (tem, str, j);
2378 memset (&str[j], 0, wcwidth);
2380 obstack_init (&output);
2381 inner_cleanup = make_cleanup_obstack_free (&output);
2383 convert_between_encodings (target_wide_charset (gdbarch),
2386 &output, translit_char);
2387 obstack_grow_str0 (&output, "");
2389 fprintf_filtered (stream, current_substring,
2390 obstack_base (&output));
2391 do_cleanups (inner_cleanup);
2396 struct gdbarch *gdbarch
2397 = get_type_arch (value_type (val_args[i]));
2398 struct type *wctype = lookup_typename (current_language, gdbarch,
2399 "wchar_t", NULL, 0);
2400 struct type *valtype;
2401 struct obstack output;
2402 struct cleanup *inner_cleanup;
2403 const gdb_byte *bytes;
2405 valtype = value_type (val_args[i]);
2406 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2407 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2408 error (_("expected wchar_t argument for %%lc"));
2410 bytes = value_contents (val_args[i]);
2412 obstack_init (&output);
2413 inner_cleanup = make_cleanup_obstack_free (&output);
2415 convert_between_encodings (target_wide_charset (gdbarch),
2417 bytes, TYPE_LENGTH (valtype),
2418 TYPE_LENGTH (valtype),
2419 &output, translit_char);
2420 obstack_grow_str0 (&output, "");
2422 fprintf_filtered (stream, current_substring,
2423 obstack_base (&output));
2424 do_cleanups (inner_cleanup);
2429 struct type *type = value_type (val_args[i]);
2433 /* If format string wants a float, unchecked-convert the value
2434 to floating point of the same size. */
2435 type = float_type_from_length (type);
2436 val = unpack_double (type, value_contents (val_args[i]), &inv);
2438 error (_("Invalid floating value found in program."));
2440 fprintf_filtered (stream, current_substring, (double) val);
2443 case long_double_arg:
2444 #ifdef HAVE_LONG_DOUBLE
2446 struct type *type = value_type (val_args[i]);
2450 /* If format string wants a float, unchecked-convert the value
2451 to floating point of the same size. */
2452 type = float_type_from_length (type);
2453 val = unpack_double (type, value_contents (val_args[i]), &inv);
2455 error (_("Invalid floating value found in program."));
2457 fprintf_filtered (stream, current_substring,
2462 error (_("long double not supported in printf"));
2465 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2467 long long val = value_as_long (val_args[i]);
2469 fprintf_filtered (stream, current_substring, val);
2473 error (_("long long not supported in printf"));
2477 int val = value_as_long (val_args[i]);
2479 fprintf_filtered (stream, current_substring, val);
2484 long val = value_as_long (val_args[i]);
2486 fprintf_filtered (stream, current_substring, val);
2490 /* Handles decimal floating values. */
2493 const gdb_byte *param_ptr = value_contents (val_args[i]);
2495 #if defined (PRINTF_HAS_DECFLOAT)
2496 /* If we have native support for Decimal floating
2497 printing, handle it here. */
2498 fprintf_filtered (stream, current_substring, param_ptr);
2501 /* As a workaround until vasprintf has native support for DFP
2502 we convert the DFP values to string and print them using
2503 the %s format specifier. */
2506 int nnull_chars = 0;
2508 /* Parameter data. */
2509 struct type *param_type = value_type (val_args[i]);
2510 unsigned int param_len = TYPE_LENGTH (param_type);
2511 struct gdbarch *gdbarch = get_type_arch (param_type);
2512 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2514 /* DFP output data. */
2515 struct value *dfp_value = NULL;
2519 struct type *dfp_type = NULL;
2520 char decstr[MAX_DECIMAL_STRING];
2522 /* Points to the end of the string so that we can go back
2523 and check for DFP length modifiers. */
2524 eos = current_substring + strlen (current_substring);
2526 /* Look for the float/double format specifier. */
2527 while (*eos != 'f' && *eos != 'e' && *eos != 'E'
2528 && *eos != 'g' && *eos != 'G')
2533 /* Search for the '%' char and extract the size and type of
2534 the output decimal value based on its modifiers
2535 (%Hf, %Df, %DDf). */
2536 while (*--sos != '%')
2541 dfp_type = builtin_type (gdbarch)->builtin_decfloat;
2543 else if (*sos == 'D' && *(sos - 1) == 'D')
2546 dfp_type = builtin_type (gdbarch)->builtin_declong;
2552 dfp_type = builtin_type (gdbarch)->builtin_decdouble;
2556 /* Replace %Hf, %Df and %DDf with %s's. */
2559 /* Go through the whole format string and pull the correct
2560 number of chars back to compensate for the change in the
2561 format specifier. */
2562 while (nnull_chars < nargs - i)
2570 /* Conversion between different DFP types. */
2571 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2572 decimal_convert (param_ptr, param_len, byte_order,
2573 dec, dfp_len, byte_order);
2575 /* If this is a non-trivial conversion, just output 0.
2576 A correct converted value can be displayed by explicitly
2577 casting to a DFP type. */
2578 decimal_from_string (dec, dfp_len, byte_order, "0");
2580 dfp_value = value_from_decfloat (dfp_type, dec);
2582 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2584 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
2586 /* Print the DFP value. */
2587 fprintf_filtered (stream, current_substring, decstr);
2595 /* We avoid the host's %p because pointers are too
2596 likely to be the wrong size. The only interesting
2597 modifier for %p is a width; extract that, and then
2598 handle %p as glibc would: %#x or a literal "(nil)". */
2600 char *p, *fmt, *fmt_p;
2601 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2602 long long val = value_as_long (val_args[i]);
2604 long val = value_as_long (val_args[i]);
2607 fmt = alloca (strlen (current_substring) + 5);
2609 /* Copy up to the leading %. */
2610 p = current_substring;
2614 int is_percent = (*p == '%');
2629 /* Copy any width. */
2630 while (*p >= '0' && *p < '9')
2633 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2636 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2642 fprintf_filtered (stream, fmt, val);
2648 fprintf_filtered (stream, fmt, "(nil)");
2654 internal_error (__FILE__, __LINE__,
2655 _("failed internal consistency check"));
2657 /* Skip to the next substring. */
2658 current_substring += strlen (current_substring) + 1;
2660 /* Print the portion of the format string after the last argument.
2661 Note that this will not include any ordinary %-specs, but it
2662 might include "%%". That is why we use printf_filtered and not
2663 puts_filtered here. Also, we pass a dummy argument because
2664 some platforms have modified GCC to include -Wformat-security
2665 by default, which will warn here if there is no argument. */
2666 fprintf_filtered (stream, last_arg, 0);
2668 do_cleanups (old_cleanups);
2671 /* Implement the "printf" command. */
2674 printf_command (char *arg, int from_tty)
2676 ui_printf (arg, gdb_stdout);
2679 /* Implement the "eval" command. */
2682 eval_command (char *arg, int from_tty)
2684 struct ui_file *ui_out = mem_fileopen ();
2685 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out);
2688 ui_printf (arg, ui_out);
2690 expanded = ui_file_xstrdup (ui_out, NULL);
2691 make_cleanup (xfree, expanded);
2693 execute_command (expanded, from_tty);
2695 do_cleanups (cleanups);
2699 _initialize_printcmd (void)
2701 struct cmd_list_element *c;
2703 current_display_number = -1;
2705 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2707 add_info ("address", address_info,
2708 _("Describe where symbol SYM is stored."));
2710 add_info ("symbol", sym_info, _("\
2711 Describe what symbol is at location ADDR.\n\
2712 Only for symbols with fixed locations (global or static scope)."));
2714 add_com ("x", class_vars, x_command, _("\
2715 Examine memory: x/FMT ADDRESS.\n\
2716 ADDRESS is an expression for the memory address to examine.\n\
2717 FMT is a repeat count followed by a format letter and a size letter.\n\
2718 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2719 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2720 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2721 The specified number of objects of the specified size are printed\n\
2722 according to the format.\n\n\
2723 Defaults for format and size letters are those previously used.\n\
2724 Default count is 1. Default address is following last thing printed\n\
2725 with this command or \"print\"."));
2728 add_com ("whereis", class_vars, whereis_command,
2729 _("Print line number and file of definition of variable."));
2732 add_info ("display", display_info, _("\
2733 Expressions to display when program stops, with code numbers."));
2735 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2736 Cancel some expressions to be displayed when program stops.\n\
2737 Arguments are the code numbers of the expressions to stop displaying.\n\
2738 No argument means cancel all automatic-display expressions.\n\
2739 \"delete display\" has the same effect as this command.\n\
2740 Do \"info display\" to see current list of code numbers."),
2743 add_com ("display", class_vars, display_command, _("\
2744 Print value of expression EXP each time the program stops.\n\
2745 /FMT may be used before EXP as in the \"print\" command.\n\
2746 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2747 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2748 and examining is done as in the \"x\" command.\n\n\
2749 With no argument, display all currently requested auto-display expressions.\n\
2750 Use \"undisplay\" to cancel display requests previously made."));
2752 add_cmd ("display", class_vars, enable_display, _("\
2753 Enable some expressions to be displayed when program stops.\n\
2754 Arguments are the code numbers of the expressions to resume displaying.\n\
2755 No argument means enable all automatic-display expressions.\n\
2756 Do \"info display\" to see current list of code numbers."), &enablelist);
2758 add_cmd ("display", class_vars, disable_display_command, _("\
2759 Disable some expressions to be displayed when program stops.\n\
2760 Arguments are the code numbers of the expressions to stop displaying.\n\
2761 No argument means disable all automatic-display expressions.\n\
2762 Do \"info display\" to see current list of code numbers."), &disablelist);
2764 add_cmd ("display", class_vars, undisplay_command, _("\
2765 Cancel some expressions to be displayed when program stops.\n\
2766 Arguments are the code numbers of the expressions to stop displaying.\n\
2767 No argument means cancel all automatic-display expressions.\n\
2768 Do \"info display\" to see current list of code numbers."), &deletelist);
2770 add_com ("printf", class_vars, printf_command, _("\
2771 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2772 This is useful for formatted output in user-defined commands."));
2774 add_com ("output", class_vars, output_command, _("\
2775 Like \"print\" but don't put in value history and don't print newline.\n\
2776 This is useful in user-defined commands."));
2778 add_prefix_cmd ("set", class_vars, set_command, _("\
2779 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2780 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2781 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2782 with $), a register (a few standard names starting with $), or an actual\n\
2783 variable in the program being debugged. EXP is any valid expression.\n\
2784 Use \"set variable\" for variables with names identical to set subcommands.\n\
2786 With a subcommand, this command modifies parts of the gdb environment.\n\
2787 You can see these environment settings with the \"show\" command."),
2788 &setlist, "set ", 1, &cmdlist);
2790 add_com ("assign", class_vars, set_command, _("\
2791 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2792 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2793 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2794 with $), a register (a few standard names starting with $), or an actual\n\
2795 variable in the program being debugged. EXP is any valid expression.\n\
2796 Use \"set variable\" for variables with names identical to set subcommands.\n\
2797 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2798 You can see these environment settings with the \"show\" command."));
2800 /* "call" is the same as "set", but handy for dbx users to call fns. */
2801 c = add_com ("call", class_vars, call_command, _("\
2802 Call a function in the program.\n\
2803 The argument is the function name and arguments, in the notation of the\n\
2804 current working language. The result is printed and saved in the value\n\
2805 history, if it is not void."));
2806 set_cmd_completer (c, expression_completer);
2808 add_cmd ("variable", class_vars, set_command, _("\
2809 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2810 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2811 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2812 with $), a register (a few standard names starting with $), or an actual\n\
2813 variable in the program being debugged. EXP is any valid expression.\n\
2814 This may usually be abbreviated to simply \"set\"."),
2817 c = add_com ("print", class_vars, print_command, _("\
2818 Print value of expression EXP.\n\
2819 Variables accessible are those of the lexical environment of the selected\n\
2820 stack frame, plus all those whose scope is global or an entire file.\n\
2822 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2823 $$NUM refers to NUM'th value back from the last one.\n\
2824 Names starting with $ refer to registers (with the values they would have\n\
2825 if the program were to return to the stack frame now selected, restoring\n\
2826 all registers saved by frames farther in) or else to debugger\n\
2827 \"convenience\" variables (any such name not a known register).\n\
2828 Use assignment expressions to give values to convenience variables.\n\
2830 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2831 @ is a binary operator for treating consecutive data objects\n\
2832 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2833 element is FOO, whose second element is stored in the space following\n\
2834 where FOO is stored, etc. FOO must be an expression whose value\n\
2835 resides in memory.\n\
2837 EXP may be preceded with /FMT, where FMT is a format letter\n\
2838 but no count or size letter (see \"x\" command)."));
2839 set_cmd_completer (c, expression_completer);
2840 add_com_alias ("p", "print", class_vars, 1);
2842 c = add_com ("inspect", class_vars, inspect_command, _("\
2843 Same as \"print\" command, except that if you are running in the epoch\n\
2844 environment, the value is printed in its own window."));
2845 set_cmd_completer (c, expression_completer);
2847 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2848 &max_symbolic_offset, _("\
2849 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2850 Show the largest offset that will be printed in <symbol+1234> form."), NULL,
2852 show_max_symbolic_offset,
2853 &setprintlist, &showprintlist);
2854 add_setshow_boolean_cmd ("symbol-filename", no_class,
2855 &print_symbol_filename, _("\
2856 Set printing of source filename and line number with <symbol>."), _("\
2857 Show printing of source filename and line number with <symbol>."), NULL,
2859 show_print_symbol_filename,
2860 &setprintlist, &showprintlist);
2862 add_com ("eval", no_class, eval_command, _("\
2863 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2864 a command line, and call it."));