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.
172 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
175 #define ALL_DISPLAYS(B) \
176 for (B = display_chain; B; B = B->next)
178 #define ALL_DISPLAYS_SAFE(B,TMP) \
179 for (B = display_chain; \
180 B ? (TMP = B->next, 1): 0; \
183 /* Prototypes for exported functions. */
185 void output_command (char *, int);
187 void _initialize_printcmd (void);
189 /* Prototypes for local functions. */
191 static void do_one_display (struct display *);
194 /* Decode a format specification. *STRING_PTR should point to it.
195 OFORMAT and OSIZE are used as defaults for the format and size
196 if none are given in the format specification.
197 If OSIZE is zero, then the size field of the returned value
198 should be set only if a size is explicitly specified by the
200 The structure returned describes all the data
201 found in the specification. In addition, *STRING_PTR is advanced
202 past the specification and past all whitespace following it. */
204 static struct format_data
205 decode_format (char **string_ptr, int oformat, int osize)
207 struct format_data val;
208 char *p = *string_ptr;
215 if (*p >= '0' && *p <= '9')
216 val.count = atoi (p);
217 while (*p >= '0' && *p <= '9')
220 /* Now process size or format letters that follow. */
224 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
231 else if (*p >= 'a' && *p <= 'z')
237 while (*p == ' ' || *p == '\t')
241 /* Set defaults for format and size if not specified. */
242 if (val.format == '?')
246 /* Neither has been specified. */
247 val.format = oformat;
251 /* If a size is specified, any format makes a reasonable
252 default except 'i'. */
253 val.format = oformat == 'i' ? 'x' : oformat;
255 else if (val.size == '?')
259 /* Pick the appropriate size for an address. This is deferred
260 until do_examine when we know the actual architecture to use.
261 A special size value of 'a' is used to indicate this case. */
262 val.size = osize ? 'a' : osize;
265 /* Floating point has to be word or giantword. */
266 if (osize == 'w' || osize == 'g')
269 /* Default it to giantword if the last used size is not
271 val.size = osize ? 'g' : osize;
274 /* Characters default to one byte. */
275 val.size = osize ? 'b' : osize;
278 /* Display strings with byte size chars unless explicitly
284 /* The default is the size most recently specified. */
291 /* Print value VAL on stream according to OPTIONS.
292 Do not end with a newline.
293 SIZE is the letter for the size of datum being printed.
294 This is used to pad hex numbers so they line up. SIZE is 0
295 for print / output and set for examine. */
298 print_formatted (struct value *val, int size,
299 const struct value_print_options *options,
300 struct ui_file *stream)
302 struct type *type = check_typedef (value_type (val));
303 int len = TYPE_LENGTH (type);
305 if (VALUE_LVAL (val) == lval_memory)
306 next_address = value_address (val) + len;
310 switch (options->format)
314 struct type *elttype = value_type (val);
316 next_address = (value_address (val)
317 + val_print_string (elttype, NULL,
318 value_address (val), -1,
319 stream, options) * len);
324 /* We often wrap here if there are long symbolic names. */
326 next_address = (value_address (val)
327 + gdb_print_insn (get_type_arch (type),
328 value_address (val), stream,
329 &branch_delay_insns));
334 if (options->format == 0 || options->format == 's'
335 || TYPE_CODE (type) == TYPE_CODE_REF
336 || TYPE_CODE (type) == TYPE_CODE_ARRAY
337 || TYPE_CODE (type) == TYPE_CODE_STRING
338 || TYPE_CODE (type) == TYPE_CODE_STRUCT
339 || TYPE_CODE (type) == TYPE_CODE_UNION
340 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
341 value_print (val, stream, options);
343 /* User specified format, so don't look to the type to tell us
345 val_print_scalar_formatted (type,
346 value_contents_for_printing (val),
347 value_embedded_offset (val),
349 options, size, stream);
352 /* Return builtin floating point type of same length as TYPE.
353 If no such type is found, return TYPE itself. */
355 float_type_from_length (struct type *type)
357 struct gdbarch *gdbarch = get_type_arch (type);
358 const struct builtin_type *builtin = builtin_type (gdbarch);
359 unsigned int len = TYPE_LENGTH (type);
361 if (len == TYPE_LENGTH (builtin->builtin_float))
362 type = builtin->builtin_float;
363 else if (len == TYPE_LENGTH (builtin->builtin_double))
364 type = builtin->builtin_double;
365 else if (len == TYPE_LENGTH (builtin->builtin_long_double))
366 type = builtin->builtin_long_double;
371 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
372 according to OPTIONS and SIZE on STREAM. Formats s and i are not
373 supported at this level. */
376 print_scalar_formatted (const void *valaddr, struct type *type,
377 const struct value_print_options *options,
378 int size, struct ui_file *stream)
380 struct gdbarch *gdbarch = get_type_arch (type);
381 LONGEST val_long = 0;
382 unsigned int len = TYPE_LENGTH (type);
383 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
385 /* String printing should go through val_print_scalar_formatted. */
386 gdb_assert (options->format != 's');
388 if (len > sizeof(LONGEST) &&
389 (TYPE_CODE (type) == TYPE_CODE_INT
390 || TYPE_CODE (type) == TYPE_CODE_ENUM))
392 switch (options->format)
395 print_octal_chars (stream, valaddr, len, byte_order);
399 print_decimal_chars (stream, valaddr, len, byte_order);
402 print_binary_chars (stream, valaddr, len, byte_order);
405 print_hex_chars (stream, valaddr, len, byte_order);
408 print_char_chars (stream, type, valaddr, len, byte_order);
415 if (options->format != 'f')
416 val_long = unpack_long (type, valaddr);
418 /* If the value is a pointer, and pointers and addresses are not the
419 same, then at this point, the value's length (in target bytes) is
420 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
421 if (TYPE_CODE (type) == TYPE_CODE_PTR)
422 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT;
424 /* If we are printing it as unsigned, truncate it in case it is actually
425 a negative signed value (e.g. "print/u (short)-1" should print 65535
426 (if shorts are 16 bits) instead of 4294967295). */
427 if (options->format != 'd' || TYPE_UNSIGNED (type))
429 if (len < sizeof (LONGEST))
430 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
433 switch (options->format)
438 /* No size specified, like in print. Print varying # of digits. */
439 print_longest (stream, 'x', 1, val_long);
448 print_longest (stream, size, 1, val_long);
451 error (_("Undefined output size \"%c\"."), size);
456 print_longest (stream, 'd', 1, val_long);
460 print_longest (stream, 'u', 0, val_long);
465 print_longest (stream, 'o', 1, val_long);
467 fprintf_filtered (stream, "0");
472 CORE_ADDR addr = unpack_pointer (type, valaddr);
474 print_address (gdbarch, addr, stream);
480 struct value_print_options opts = *options;
483 if (TYPE_UNSIGNED (type))
484 type = builtin_type (gdbarch)->builtin_true_unsigned_char;
486 type = builtin_type (gdbarch)->builtin_true_char;
488 value_print (value_from_longest (type, val_long), stream, &opts);
493 type = float_type_from_length (type);
494 print_floating (valaddr, type, stream);
498 internal_error (__FILE__, __LINE__,
499 _("failed internal consistency check"));
502 /* Binary; 't' stands for "two". */
504 char bits[8 * (sizeof val_long) + 1];
505 char buf[8 * (sizeof val_long) + 32];
510 width = 8 * (sizeof val_long);
527 error (_("Undefined output size \"%c\"."), size);
533 bits[width] = (val_long & 1) ? '1' : '0';
538 while (*cp && *cp == '0')
543 strncpy (buf, cp, sizeof (bits));
544 fputs_filtered (buf, stream);
549 error (_("Undefined output format \"%c\"."), options->format);
553 /* Specify default address for `x' command.
554 The `info lines' command uses this. */
557 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
559 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
561 next_gdbarch = gdbarch;
564 /* Make address available to the user as $_. */
565 set_internalvar (lookup_internalvar ("_"),
566 value_from_pointer (ptr_type, addr));
569 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
570 after LEADIN. Print nothing if no symbolic name is found nearby.
571 Optionally also print source file and line number, if available.
572 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
573 or to interpret it as a possible C++ name and convert it back to source
574 form. However note that DO_DEMANGLE can be overridden by the specific
575 settings of the demangle and asm_demangle variables. */
578 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr,
579 struct ui_file *stream,
580 int do_demangle, char *leadin)
583 char *filename = NULL;
588 /* Throw away both name and filename. */
589 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
590 make_cleanup (free_current_contents, &filename);
592 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset,
593 &filename, &line, &unmapped))
595 do_cleanups (cleanup_chain);
599 fputs_filtered (leadin, stream);
601 fputs_filtered ("<*", stream);
603 fputs_filtered ("<", stream);
604 fputs_filtered (name, stream);
606 fprintf_filtered (stream, "+%u", (unsigned int) offset);
608 /* Append source filename and line number if desired. Give specific
609 line # of this addr, if we have it; else line # of the nearest symbol. */
610 if (print_symbol_filename && filename != NULL)
613 fprintf_filtered (stream, " at %s:%d", filename, line);
615 fprintf_filtered (stream, " in %s", filename);
618 fputs_filtered ("*>", stream);
620 fputs_filtered (">", stream);
622 do_cleanups (cleanup_chain);
625 /* Given an address ADDR return all the elements needed to print the
626 address in a symbolic form. NAME can be mangled or not depending
627 on DO_DEMANGLE (and also on the asm_demangle global variable,
628 manipulated via ''set print asm-demangle''). Return 0 in case of
629 success, when all the info in the OUT paramters is valid. Return 1
632 build_address_symbolic (struct gdbarch *gdbarch,
633 CORE_ADDR addr, /* IN */
634 int do_demangle, /* IN */
635 char **name, /* OUT */
636 int *offset, /* OUT */
637 char **filename, /* OUT */
639 int *unmapped) /* OUT */
641 struct minimal_symbol *msymbol;
642 struct symbol *symbol;
643 CORE_ADDR name_location = 0;
644 struct obj_section *section = NULL;
645 char *name_temp = "";
647 /* Let's say it is mapped (not unmapped). */
650 /* Determine if the address is in an overlay, and whether it is
652 if (overlay_debugging)
654 section = find_pc_overlay (addr);
655 if (pc_in_unmapped_range (addr, section))
658 addr = overlay_mapped_address (addr, section);
662 /* First try to find the address in the symbol table, then
663 in the minsyms. Take the closest one. */
665 /* This is defective in the sense that it only finds text symbols. So
666 really this is kind of pointless--we should make sure that the
667 minimal symbols have everything we need (by changing that we could
668 save some memory, but for many debug format--ELF/DWARF or
669 anything/stabs--it would be inconvenient to eliminate those minimal
671 msymbol = lookup_minimal_symbol_by_pc_section (addr, section);
672 symbol = find_pc_sect_function (addr, section);
676 /* If this is a function (i.e. a code address), strip out any
677 non-address bits. For instance, display a pointer to the
678 first instruction of a Thumb function as <function>; the
679 second instruction will be <function+2>, even though the
680 pointer is <function+3>. This matches the ISA behavior. */
681 addr = gdbarch_addr_bits_remove (gdbarch, addr);
683 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
684 if (do_demangle || asm_demangle)
685 name_temp = SYMBOL_PRINT_NAME (symbol);
687 name_temp = SYMBOL_LINKAGE_NAME (symbol);
692 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
694 /* The msymbol is closer to the address than the symbol;
695 use the msymbol instead. */
697 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
698 if (do_demangle || asm_demangle)
699 name_temp = SYMBOL_PRINT_NAME (msymbol);
701 name_temp = SYMBOL_LINKAGE_NAME (msymbol);
704 if (symbol == NULL && msymbol == NULL)
707 /* If the nearest symbol is too far away, don't print anything symbolic. */
709 /* For when CORE_ADDR is larger than unsigned int, we do math in
710 CORE_ADDR. But when we detect unsigned wraparound in the
711 CORE_ADDR math, we ignore this test and print the offset,
712 because addr+max_symbolic_offset has wrapped through the end
713 of the address space back to the beginning, giving bogus comparison. */
714 if (addr > name_location + max_symbolic_offset
715 && name_location + max_symbolic_offset > name_location)
718 *offset = addr - name_location;
720 *name = xstrdup (name_temp);
722 if (print_symbol_filename)
724 struct symtab_and_line sal;
726 sal = find_pc_sect_line (addr, section, 0);
730 *filename = xstrdup (sal.symtab->filename);
738 /* Print address ADDR symbolically on STREAM.
739 First print it as a number. Then perhaps print
740 <SYMBOL + OFFSET> after the number. */
743 print_address (struct gdbarch *gdbarch,
744 CORE_ADDR addr, struct ui_file *stream)
746 fputs_filtered (paddress (gdbarch, addr), stream);
747 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " ");
750 /* Return a prefix for instruction address:
751 "=> " for current instruction, else " ". */
754 pc_prefix (CORE_ADDR addr)
756 if (has_stack_frames ())
758 struct frame_info *frame;
761 frame = get_selected_frame (NULL);
762 pc = get_frame_pc (frame);
770 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
771 controls whether to print the symbolic name "raw" or demangled.
772 Global setting "addressprint" controls whether to print hex address
776 print_address_demangle (struct gdbarch *gdbarch, CORE_ADDR addr,
777 struct ui_file *stream, int do_demangle)
779 struct value_print_options opts;
781 get_user_print_options (&opts);
784 fprintf_filtered (stream, "0");
786 else if (opts.addressprint)
788 fputs_filtered (paddress (gdbarch, addr), stream);
789 print_address_symbolic (gdbarch, addr, stream, do_demangle, " ");
793 print_address_symbolic (gdbarch, addr, stream, do_demangle, "");
798 /* Examine data at address ADDR in format FMT.
799 Fetch it from memory and print on gdb_stdout. */
802 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr)
807 struct type *val_type = NULL;
810 struct value_print_options opts;
815 next_gdbarch = gdbarch;
818 /* Instruction format implies fetch single bytes
819 regardless of the specified size.
820 The case of strings is handled in decode_format, only explicit
821 size operator are not changed to 'b'. */
827 /* Pick the appropriate size for an address. */
828 if (gdbarch_ptr_bit (next_gdbarch) == 64)
830 else if (gdbarch_ptr_bit (next_gdbarch) == 32)
832 else if (gdbarch_ptr_bit (next_gdbarch) == 16)
835 /* Bad value for gdbarch_ptr_bit. */
836 internal_error (__FILE__, __LINE__,
837 _("failed internal consistency check"));
841 val_type = builtin_type (next_gdbarch)->builtin_int8;
842 else if (size == 'h')
843 val_type = builtin_type (next_gdbarch)->builtin_int16;
844 else if (size == 'w')
845 val_type = builtin_type (next_gdbarch)->builtin_int32;
846 else if (size == 'g')
847 val_type = builtin_type (next_gdbarch)->builtin_int64;
851 struct type *char_type = NULL;
853 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
854 if type is not found. */
856 char_type = builtin_type (next_gdbarch)->builtin_char16;
857 else if (size == 'w')
858 char_type = builtin_type (next_gdbarch)->builtin_char32;
860 val_type = char_type;
863 if (size != '\0' && size != 'b')
864 warning (_("Unable to display strings with "
865 "size '%c', using 'b' instead."), size);
867 val_type = builtin_type (next_gdbarch)->builtin_int8;
876 if (format == 's' || format == 'i')
879 get_formatted_print_options (&opts, format);
881 /* Print as many objects as specified in COUNT, at most maxelts per line,
882 with the address of the next one at the start of each line. */
888 fputs_filtered (pc_prefix (next_address), gdb_stdout);
889 print_address (next_gdbarch, next_address, gdb_stdout);
890 printf_filtered (":");
895 printf_filtered ("\t");
896 /* Note that print_formatted sets next_address for the next
898 last_examine_address = next_address;
900 if (last_examine_value)
901 value_free (last_examine_value);
903 /* The value to be displayed is not fetched greedily.
904 Instead, to avoid the possibility of a fetched value not
905 being used, its retrieval is delayed until the print code
906 uses it. When examining an instruction stream, the
907 disassembler will perform its own memory fetch using just
908 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
909 the disassembler be modified so that LAST_EXAMINE_VALUE
910 is left with the byte sequence from the last complete
911 instruction fetched from memory? */
912 last_examine_value = value_at_lazy (val_type, next_address);
914 if (last_examine_value)
915 release_value (last_examine_value);
917 print_formatted (last_examine_value, size, &opts, gdb_stdout);
919 /* Display any branch delay slots following the final insn. */
920 if (format == 'i' && count == 1)
921 count += branch_delay_insns;
923 printf_filtered ("\n");
924 gdb_flush (gdb_stdout);
929 validate_format (struct format_data fmt, char *cmdname)
932 error (_("Size letters are meaningless in \"%s\" command."), cmdname);
934 error (_("Item count other than 1 is meaningless in \"%s\" command."),
936 if (fmt.format == 'i')
937 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
938 fmt.format, cmdname);
941 /* Evaluate string EXP as an expression in the current language and
942 print the resulting value. EXP may contain a format specifier as the
943 first argument ("/x myvar" for example, to print myvar in hex). */
946 print_command_1 (char *exp, int inspect, int voidprint)
948 struct expression *expr;
949 struct cleanup *old_chain = 0;
952 struct format_data fmt;
955 if (exp && *exp == '/')
958 fmt = decode_format (&exp, last_format, 0);
959 validate_format (fmt, "print");
960 last_format = format = fmt.format;
972 expr = parse_expression (exp);
973 old_chain = make_cleanup (free_current_contents, &expr);
975 val = evaluate_expression (expr);
978 val = access_value_history (0);
980 if (voidprint || (val && value_type (val) &&
981 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
983 struct value_print_options opts;
984 int histindex = record_latest_value (val);
987 annotate_value_history_begin (histindex, value_type (val));
989 annotate_value_begin (value_type (val));
992 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
994 else if (histindex >= 0)
995 printf_filtered ("$%d = ", histindex);
998 annotate_value_history_value ();
1000 get_formatted_print_options (&opts, format);
1001 opts.inspect_it = inspect;
1004 print_formatted (val, fmt.size, &opts, gdb_stdout);
1005 printf_filtered ("\n");
1008 annotate_value_history_end ();
1010 annotate_value_end ();
1013 printf_unfiltered ("\") )\030");
1017 do_cleanups (old_chain);
1021 print_command (char *exp, int from_tty)
1023 print_command_1 (exp, 0, 1);
1026 /* Same as print, except in epoch, it gets its own window. */
1028 inspect_command (char *exp, int from_tty)
1030 extern int epoch_interface;
1032 print_command_1 (exp, epoch_interface, 1);
1035 /* Same as print, except it doesn't print void results. */
1037 call_command (char *exp, int from_tty)
1039 print_command_1 (exp, 0, 0);
1043 output_command (char *exp, int from_tty)
1045 struct expression *expr;
1046 struct cleanup *old_chain;
1049 struct format_data fmt;
1050 struct value_print_options opts;
1055 if (exp && *exp == '/')
1058 fmt = decode_format (&exp, 0, 0);
1059 validate_format (fmt, "output");
1060 format = fmt.format;
1063 expr = parse_expression (exp);
1064 old_chain = make_cleanup (free_current_contents, &expr);
1066 val = evaluate_expression (expr);
1068 annotate_value_begin (value_type (val));
1070 get_formatted_print_options (&opts, format);
1072 print_formatted (val, fmt.size, &opts, gdb_stdout);
1074 annotate_value_end ();
1077 gdb_flush (gdb_stdout);
1079 do_cleanups (old_chain);
1083 set_command (char *exp, int from_tty)
1085 struct expression *expr = parse_expression (exp);
1086 struct cleanup *old_chain =
1087 make_cleanup (free_current_contents, &expr);
1089 evaluate_expression (expr);
1090 do_cleanups (old_chain);
1094 sym_info (char *arg, int from_tty)
1096 struct minimal_symbol *msymbol;
1097 struct objfile *objfile;
1098 struct obj_section *osect;
1099 CORE_ADDR addr, sect_addr;
1101 unsigned int offset;
1104 error_no_arg (_("address"));
1106 addr = parse_and_eval_address (arg);
1107 ALL_OBJSECTIONS (objfile, osect)
1109 /* Only process each object file once, even if there's a separate
1111 if (objfile->separate_debug_objfile_backlink)
1114 sect_addr = overlay_mapped_address (addr, osect);
1116 if (obj_section_addr (osect) <= sect_addr
1117 && sect_addr < obj_section_endaddr (osect)
1118 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect)))
1120 const char *obj_name, *mapped, *sec_name, *msym_name;
1122 struct cleanup *old_chain;
1125 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1126 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
1127 sec_name = osect->the_bfd_section->name;
1128 msym_name = SYMBOL_PRINT_NAME (msymbol);
1130 /* Don't print the offset if it is zero.
1131 We assume there's no need to handle i18n of "sym + offset". */
1133 loc_string = xstrprintf ("%s + %u", msym_name, offset);
1135 loc_string = xstrprintf ("%s", msym_name);
1137 /* Use a cleanup to free loc_string in case the user quits
1138 a pagination request inside printf_filtered. */
1139 old_chain = make_cleanup (xfree, loc_string);
1141 gdb_assert (osect->objfile && osect->objfile->name);
1142 obj_name = osect->objfile->name;
1144 if (MULTI_OBJFILE_P ())
1145 if (pc_in_unmapped_range (addr, osect))
1146 if (section_is_overlay (osect))
1147 printf_filtered (_("%s in load address range of "
1148 "%s overlay section %s of %s\n"),
1149 loc_string, mapped, sec_name, obj_name);
1151 printf_filtered (_("%s in load address range of "
1152 "section %s of %s\n"),
1153 loc_string, sec_name, obj_name);
1155 if (section_is_overlay (osect))
1156 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1157 loc_string, mapped, sec_name, obj_name);
1159 printf_filtered (_("%s in section %s of %s\n"),
1160 loc_string, sec_name, obj_name);
1162 if (pc_in_unmapped_range (addr, osect))
1163 if (section_is_overlay (osect))
1164 printf_filtered (_("%s in load address range of %s overlay "
1166 loc_string, mapped, sec_name);
1168 printf_filtered (_("%s in load address range of section %s\n"),
1169 loc_string, sec_name);
1171 if (section_is_overlay (osect))
1172 printf_filtered (_("%s in %s overlay section %s\n"),
1173 loc_string, mapped, sec_name);
1175 printf_filtered (_("%s in section %s\n"),
1176 loc_string, sec_name);
1178 do_cleanups (old_chain);
1182 printf_filtered (_("No symbol matches %s.\n"), arg);
1186 address_info (char *exp, int from_tty)
1188 struct gdbarch *gdbarch;
1191 struct minimal_symbol *msymbol;
1193 struct obj_section *section;
1194 CORE_ADDR load_addr, context_pc = 0;
1195 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
1196 if exp is a field of `this'. */
1199 error (_("Argument required."));
1201 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
1202 &is_a_field_of_this);
1205 if (is_a_field_of_this)
1207 printf_filtered ("Symbol \"");
1208 fprintf_symbol_filtered (gdb_stdout, exp,
1209 current_language->la_language, DMGL_ANSI);
1210 printf_filtered ("\" is a field of the local class variable ");
1211 if (current_language->la_language == language_objc)
1212 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1214 printf_filtered ("`this'\n");
1218 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1220 if (msymbol != NULL)
1222 gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
1223 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1225 printf_filtered ("Symbol \"");
1226 fprintf_symbol_filtered (gdb_stdout, exp,
1227 current_language->la_language, DMGL_ANSI);
1228 printf_filtered ("\" is at ");
1229 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1230 printf_filtered (" in a file compiled without debugging");
1231 section = SYMBOL_OBJ_SECTION (msymbol);
1232 if (section_is_overlay (section))
1234 load_addr = overlay_unmapped_address (load_addr, section);
1235 printf_filtered (",\n -- loaded at ");
1236 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1237 printf_filtered (" in overlay section %s",
1238 section->the_bfd_section->name);
1240 printf_filtered (".\n");
1243 error (_("No symbol \"%s\" in current context."), exp);
1247 printf_filtered ("Symbol \"");
1248 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1249 current_language->la_language, DMGL_ANSI);
1250 printf_filtered ("\" is ");
1251 val = SYMBOL_VALUE (sym);
1252 section = SYMBOL_OBJ_SECTION (sym);
1253 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1255 switch (SYMBOL_CLASS (sym))
1258 case LOC_CONST_BYTES:
1259 printf_filtered ("constant");
1263 printf_filtered ("a label at address ");
1264 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1265 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1266 if (section_is_overlay (section))
1268 load_addr = overlay_unmapped_address (load_addr, section);
1269 printf_filtered (",\n -- loaded at ");
1270 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1271 printf_filtered (" in overlay section %s",
1272 section->the_bfd_section->name);
1277 /* FIXME: cagney/2004-01-26: It should be possible to
1278 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1279 Unfortunately DWARF 2 stores the frame-base (instead of the
1280 function) location in a function's symbol. Oops! For the
1281 moment enable this when/where applicable. */
1282 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc,
1287 /* GDBARCH is the architecture associated with the objfile the symbol
1288 is defined in; the target architecture may be different, and may
1289 provide additional registers. However, we do not know the target
1290 architecture at this point. We assume the objfile architecture
1291 will contain all the standard registers that occur in debug info
1293 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1295 if (SYMBOL_IS_ARGUMENT (sym))
1296 printf_filtered (_("an argument in register %s"),
1297 gdbarch_register_name (gdbarch, regno));
1299 printf_filtered (_("a variable in register %s"),
1300 gdbarch_register_name (gdbarch, regno));
1304 printf_filtered (_("static storage at address "));
1305 load_addr = SYMBOL_VALUE_ADDRESS (sym);
1306 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1307 if (section_is_overlay (section))
1309 load_addr = overlay_unmapped_address (load_addr, section);
1310 printf_filtered (_(",\n -- loaded at "));
1311 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1312 printf_filtered (_(" in overlay section %s"),
1313 section->the_bfd_section->name);
1317 case LOC_REGPARM_ADDR:
1318 /* Note comment at LOC_REGISTER. */
1319 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1320 printf_filtered (_("address of an argument in register %s"),
1321 gdbarch_register_name (gdbarch, regno));
1325 printf_filtered (_("an argument at offset %ld"), val);
1329 printf_filtered (_("a local variable at frame offset %ld"), val);
1333 printf_filtered (_("a reference argument at offset %ld"), val);
1337 printf_filtered (_("a typedef"));
1341 printf_filtered (_("a function at address "));
1342 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1343 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1344 if (section_is_overlay (section))
1346 load_addr = overlay_unmapped_address (load_addr, section);
1347 printf_filtered (_(",\n -- loaded at "));
1348 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1349 printf_filtered (_(" in overlay section %s"),
1350 section->the_bfd_section->name);
1354 case LOC_UNRESOLVED:
1356 struct minimal_symbol *msym;
1358 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
1360 printf_filtered ("unresolved");
1363 section = SYMBOL_OBJ_SECTION (msym);
1364 load_addr = SYMBOL_VALUE_ADDRESS (msym);
1367 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1368 printf_filtered (_("a thread-local variable at offset %s "
1369 "in the thread-local storage for `%s'"),
1370 paddress (gdbarch, load_addr),
1371 section->objfile->name);
1374 printf_filtered (_("static storage at address "));
1375 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1376 if (section_is_overlay (section))
1378 load_addr = overlay_unmapped_address (load_addr, section);
1379 printf_filtered (_(",\n -- loaded at "));
1380 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout);
1381 printf_filtered (_(" in overlay section %s"),
1382 section->the_bfd_section->name);
1389 case LOC_OPTIMIZED_OUT:
1390 printf_filtered (_("optimized out"));
1394 printf_filtered (_("of unknown (botched) type"));
1397 printf_filtered (".\n");
1402 x_command (char *exp, int from_tty)
1404 struct expression *expr;
1405 struct format_data fmt;
1406 struct cleanup *old_chain;
1409 fmt.format = last_format ? last_format : 'x';
1410 fmt.size = last_size;
1414 if (exp && *exp == '/')
1417 fmt = decode_format (&exp, last_format, last_size);
1420 /* If we have an expression, evaluate it and use it as the address. */
1422 if (exp != 0 && *exp != 0)
1424 expr = parse_expression (exp);
1425 /* Cause expression not to be there any more if this command is
1426 repeated with Newline. But don't clobber a user-defined
1427 command's definition. */
1430 old_chain = make_cleanup (free_current_contents, &expr);
1431 val = evaluate_expression (expr);
1432 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1433 val = coerce_ref (val);
1434 /* In rvalue contexts, such as this, functions are coerced into
1435 pointers to functions. This makes "x/i main" work. */
1436 if (/* last_format == 'i' && */
1437 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1438 && VALUE_LVAL (val) == lval_memory)
1439 next_address = value_address (val);
1441 next_address = value_as_address (val);
1443 next_gdbarch = expr->gdbarch;
1444 do_cleanups (old_chain);
1448 error_no_arg (_("starting display address"));
1450 do_examine (fmt, next_gdbarch, next_address);
1452 /* If the examine succeeds, we remember its size and format for next
1453 time. Set last_size to 'b' for strings. */
1454 if (fmt.format == 's')
1457 last_size = fmt.size;
1458 last_format = fmt.format;
1460 /* Set a couple of internal variables if appropriate. */
1461 if (last_examine_value)
1463 /* Make last address examined available to the user as $_. Use
1464 the correct pointer type. */
1465 struct type *pointer_type
1466 = lookup_pointer_type (value_type (last_examine_value));
1467 set_internalvar (lookup_internalvar ("_"),
1468 value_from_pointer (pointer_type,
1469 last_examine_address));
1471 /* Make contents of last address examined available to the user
1472 as $__. If the last value has not been fetched from memory
1473 then don't fetch it now; instead mark it by voiding the $__
1475 if (value_lazy (last_examine_value))
1476 clear_internalvar (lookup_internalvar ("__"));
1478 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1483 /* Add an expression to the auto-display chain.
1484 Specify the expression. */
1487 display_command (char *exp, int from_tty)
1489 struct format_data fmt;
1490 struct expression *expr;
1491 struct display *new;
1495 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1497 if (tui_active && exp != NULL && *exp == '$')
1498 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1512 fmt = decode_format (&exp, 0, 0);
1513 if (fmt.size && fmt.format == 0)
1515 if (fmt.format == 'i' || fmt.format == 's')
1526 innermost_block = NULL;
1527 expr = parse_expression (exp);
1529 new = (struct display *) xmalloc (sizeof (struct display));
1531 new->exp_string = xstrdup (exp);
1533 new->block = innermost_block;
1534 new->pspace = current_program_space;
1535 new->next = display_chain;
1536 new->number = ++display_number;
1539 display_chain = new;
1541 if (from_tty && target_has_execution)
1542 do_one_display (new);
1549 free_display (struct display *d)
1551 xfree (d->exp_string);
1556 /* Clear out the display_chain. Done when new symtabs are loaded,
1557 since this invalidates the types stored in many expressions. */
1560 clear_displays (void)
1564 while ((d = display_chain) != NULL)
1566 display_chain = d->next;
1571 /* Delete the auto-display DISPLAY. */
1574 delete_display (struct display *display)
1578 gdb_assert (display != NULL);
1580 if (display_chain == display)
1581 display_chain = display->next;
1584 if (d->next == display)
1586 d->next = display->next;
1590 free_display (display);
1593 /* Call FUNCTION on each of the displays whose numbers are given in
1594 ARGS. DATA is passed unmodified to FUNCTION. */
1597 map_display_numbers (char *args,
1598 void (*function) (struct display *,
1602 struct get_number_or_range_state state;
1603 struct display *b, *tmp;
1607 error_no_arg (_("one or more display numbers"));
1609 init_number_or_range (&state, args);
1611 while (!state.finished)
1613 char *p = state.string;
1615 num = get_number_or_range (&state);
1617 warning (_("bad display number at or near '%s'"), p);
1620 struct display *d, *tmp;
1622 ALL_DISPLAYS_SAFE (d, tmp)
1623 if (d->number == num)
1626 printf_unfiltered (_("No display number %d.\n"), num);
1633 /* Callback for map_display_numbers, that deletes a display. */
1636 do_delete_display (struct display *d, void *data)
1641 /* "undisplay" command. */
1644 undisplay_command (char *args, int from_tty)
1647 struct get_number_or_range_state state;
1651 if (query (_("Delete all auto-display expressions? ")))
1657 map_display_numbers (args, do_delete_display, NULL);
1661 /* Display a single auto-display.
1662 Do nothing if the display cannot be printed in the current context,
1663 or if the display is disabled. */
1666 do_one_display (struct display *d)
1668 int within_current_scope;
1670 if (d->enabled_p == 0)
1673 /* The expression carries the architecture that was used at parse time.
1674 This is a problem if the expression depends on architecture features
1675 (e.g. register numbers), and the current architecture is now different.
1676 For example, a display statement like "display/i $pc" is expected to
1677 display the PC register of the current architecture, not the arch at
1678 the time the display command was given. Therefore, we re-parse the
1679 expression if the current architecture has changed. */
1680 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ())
1689 volatile struct gdb_exception ex;
1691 TRY_CATCH (ex, RETURN_MASK_ALL)
1693 innermost_block = NULL;
1694 d->exp = parse_expression (d->exp_string);
1695 d->block = innermost_block;
1699 /* Can't re-parse the expression. Disable this display item. */
1701 warning (_("Unable to display \"%s\": %s"),
1702 d->exp_string, ex.message);
1709 if (d->pspace == current_program_space)
1710 within_current_scope = contained_in (get_selected_block (0), d->block);
1712 within_current_scope = 0;
1715 within_current_scope = 1;
1716 if (!within_current_scope)
1719 current_display_number = d->number;
1721 annotate_display_begin ();
1722 printf_filtered ("%d", d->number);
1723 annotate_display_number_end ();
1724 printf_filtered (": ");
1730 annotate_display_format ();
1732 printf_filtered ("x/");
1733 if (d->format.count != 1)
1734 printf_filtered ("%d", d->format.count);
1735 printf_filtered ("%c", d->format.format);
1736 if (d->format.format != 'i' && d->format.format != 's')
1737 printf_filtered ("%c", d->format.size);
1738 printf_filtered (" ");
1740 annotate_display_expression ();
1742 puts_filtered (d->exp_string);
1743 annotate_display_expression_end ();
1745 if (d->format.count != 1 || d->format.format == 'i')
1746 printf_filtered ("\n");
1748 printf_filtered (" ");
1750 val = evaluate_expression (d->exp);
1751 addr = value_as_address (val);
1752 if (d->format.format == 'i')
1753 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
1755 annotate_display_value ();
1757 do_examine (d->format, d->exp->gdbarch, addr);
1761 struct value_print_options opts;
1763 annotate_display_format ();
1765 if (d->format.format)
1766 printf_filtered ("/%c ", d->format.format);
1768 annotate_display_expression ();
1770 puts_filtered (d->exp_string);
1771 annotate_display_expression_end ();
1773 printf_filtered (" = ");
1775 annotate_display_expression ();
1777 get_formatted_print_options (&opts, d->format.format);
1778 opts.raw = d->format.raw;
1779 print_formatted (evaluate_expression (d->exp),
1780 d->format.size, &opts, gdb_stdout);
1781 printf_filtered ("\n");
1784 annotate_display_end ();
1786 gdb_flush (gdb_stdout);
1787 current_display_number = -1;
1790 /* Display all of the values on the auto-display chain which can be
1791 evaluated in the current scope. */
1798 for (d = display_chain; d; d = d->next)
1802 /* Delete the auto-display which we were in the process of displaying.
1803 This is done when there is an error or a signal. */
1806 disable_display (int num)
1810 for (d = display_chain; d; d = d->next)
1811 if (d->number == num)
1816 printf_unfiltered (_("No display number %d.\n"), num);
1820 disable_current_display (void)
1822 if (current_display_number >= 0)
1824 disable_display (current_display_number);
1825 fprintf_unfiltered (gdb_stderr,
1826 _("Disabling display %d to "
1827 "avoid infinite recursion.\n"),
1828 current_display_number);
1830 current_display_number = -1;
1834 display_info (char *ignore, int from_tty)
1839 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1841 printf_filtered (_("Auto-display expressions now in effect:\n\
1842 Num Enb Expression\n"));
1844 for (d = display_chain; d; d = d->next)
1846 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1848 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1850 else if (d->format.format)
1851 printf_filtered ("/%c ", d->format.format);
1852 puts_filtered (d->exp_string);
1853 if (d->block && !contained_in (get_selected_block (0), d->block))
1854 printf_filtered (_(" (cannot be evaluated in the current context)"));
1855 printf_filtered ("\n");
1856 gdb_flush (gdb_stdout);
1860 /* Callback fo map_display_numbers, that enables or disables the
1861 passed in display D. */
1864 do_enable_disable_display (struct display *d, void *data)
1866 d->enabled_p = *(int *) data;
1869 /* Implamentation of both the "disable display" and "enable display"
1870 commands. ENABLE decides what to do. */
1873 enable_disable_display_command (char *args, int from_tty, int enable)
1880 d->enabled_p = enable;
1884 map_display_numbers (args, do_enable_disable_display, &enable);
1887 /* The "enable display" command. */
1890 enable_display_command (char *args, int from_tty)
1892 enable_disable_display_command (args, from_tty, 1);
1895 /* The "disable display" command. */
1898 disable_display_command (char *args, int from_tty)
1900 enable_disable_display_command (args, from_tty, 0);
1903 /* display_chain items point to blocks and expressions. Some expressions in
1904 turn may point to symbols.
1905 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1906 obstack_free'd when a shared library is unloaded.
1907 Clear pointers that are about to become dangling.
1908 Both .exp and .block fields will be restored next time we need to display
1909 an item by re-parsing .exp_string field in the new execution context. */
1912 clear_dangling_display_expressions (struct so_list *solib)
1914 struct objfile *objfile = solib->objfile;
1917 /* With no symbol file we cannot have a block or expression from it. */
1918 if (objfile == NULL)
1920 if (objfile->separate_debug_objfile_backlink)
1921 objfile = objfile->separate_debug_objfile_backlink;
1922 gdb_assert (objfile->pspace == solib->pspace);
1924 for (d = display_chain; d != NULL; d = d->next)
1926 if (d->pspace != solib->pspace)
1929 if (lookup_objfile_from_block (d->block) == objfile
1930 || (d->exp && exp_uses_objfile (d->exp, objfile)))
1940 /* Print the value in stack frame FRAME of a variable specified by a
1941 struct symbol. NAME is the name to print; if NULL then VAR's print
1942 name will be used. STREAM is the ui_file on which to print the
1943 value. INDENT specifies the number of indent levels to print
1944 before printing the variable name. */
1947 print_variable_and_value (const char *name, struct symbol *var,
1948 struct frame_info *frame,
1949 struct ui_file *stream, int indent)
1951 volatile struct gdb_exception except;
1954 name = SYMBOL_PRINT_NAME (var);
1956 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name);
1957 TRY_CATCH (except, RETURN_MASK_ERROR)
1960 struct value_print_options opts;
1962 val = read_var_value (var, frame);
1963 get_user_print_options (&opts);
1964 common_val_print (val, stream, indent, &opts, current_language);
1966 if (except.reason < 0)
1967 fprintf_filtered(stream, "<error reading variable %s (%s)>", name,
1969 fprintf_filtered (stream, "\n");
1972 /* printf "printf format string" ARG to STREAM. */
1975 ui_printf (char *arg, struct ui_file *stream)
1979 char *string = NULL;
1980 struct value **val_args;
1982 char *current_substring;
1984 int allocated_args = 20;
1985 struct cleanup *old_cleanups;
1987 val_args = xmalloc (allocated_args * sizeof (struct value *));
1988 old_cleanups = make_cleanup (free_current_contents, &val_args);
1991 error_no_arg (_("format-control string and values to print"));
1993 s = skip_spaces (s);
1995 /* A format string should follow, enveloped in double quotes. */
1997 error (_("Bad format string, missing '\"'."));
1999 /* Parse the format-control string and copy it into the string STRING,
2000 processing some kinds of escape sequence. */
2002 f = string = (char *) alloca (strlen (s) + 1);
2010 error (_("Bad format string, non-terminated '\"'."));
2043 /* ??? TODO: handle other escape sequences. */
2044 error (_("Unrecognized escape character \\%c in format string."),
2054 /* Skip over " and following space and comma. */
2057 s = skip_spaces (s);
2059 if (*s != ',' && *s != 0)
2060 error (_("Invalid argument syntax"));
2064 s = skip_spaces (s);
2066 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2067 substrings = alloca (strlen (string) * 2);
2068 current_substring = substrings;
2071 /* Now scan the string for %-specs and see what kinds of args they want.
2072 argclass[I] classifies the %-specs so we can give printf_filtered
2073 something of the right size. */
2077 int_arg, long_arg, long_long_arg, ptr_arg,
2078 string_arg, wide_string_arg, wide_char_arg,
2079 double_arg, long_double_arg, decfloat_arg
2081 enum argclass *argclass;
2082 enum argclass this_argclass;
2087 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass);
2094 int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0;
2095 int seen_space = 0, seen_plus = 0;
2096 int seen_big_l = 0, seen_h = 0, seen_big_h = 0;
2097 int seen_big_d = 0, seen_double_big_d = 0;
2100 /* Check the validity of the format specifier, and work
2101 out what argument it expects. We only accept C89
2102 format strings, with the exception of long long (which
2103 we autoconf for). */
2105 /* Skip over "%%". */
2112 /* The first part of a format specifier is a set of flag
2114 while (strchr ("0-+ #", *f))
2127 /* The next part of a format specifier is a width. */
2128 while (strchr ("0123456789", *f))
2131 /* The next part of a format specifier is a precision. */
2136 while (strchr ("0123456789", *f))
2140 /* The next part of a format specifier is a length modifier. */
2161 /* Decimal32 modifier. */
2167 /* Decimal64 and Decimal128 modifiers. */
2172 /* Check for a Decimal128. */
2176 seen_double_big_d = 1;
2192 if (seen_space || seen_plus)
2199 this_argclass = int_arg;
2200 else if (lcount == 1)
2201 this_argclass = long_arg;
2203 this_argclass = long_long_arg;
2210 this_argclass = lcount == 0 ? int_arg : wide_char_arg;
2211 if (lcount > 1 || seen_h || seen_big_l)
2213 if (seen_prec || seen_zero || seen_space || seen_plus)
2218 this_argclass = ptr_arg;
2219 if (lcount || seen_h || seen_big_l)
2221 if (seen_prec || seen_zero || seen_space || seen_plus)
2226 this_argclass = lcount == 0 ? string_arg : wide_string_arg;
2227 if (lcount > 1 || seen_h || seen_big_l)
2229 if (seen_zero || seen_space || seen_plus)
2238 if (seen_big_h || seen_big_d || seen_double_big_d)
2239 this_argclass = decfloat_arg;
2240 else if (seen_big_l)
2241 this_argclass = long_double_arg;
2243 this_argclass = double_arg;
2245 if (lcount || seen_h)
2250 error (_("`*' not supported for precision or width in printf"));
2253 error (_("Format specifier `n' not supported in printf"));
2256 error (_("Incomplete format specifier at end of format string"));
2259 error (_("Unrecognized format specifier '%c' in printf"), *f);
2263 error (_("Inappropriate modifiers to "
2264 "format specifier '%c' in printf"),
2269 if (lcount > 1 && USE_PRINTF_I64)
2271 /* Windows' printf does support long long, but not the usual way.
2272 Convert %lld to %I64d. */
2273 int length_before_ll = f - last_arg - 1 - lcount;
2275 strncpy (current_substring, last_arg, length_before_ll);
2276 strcpy (current_substring + length_before_ll, "I64");
2277 current_substring[length_before_ll + 3] =
2278 last_arg[length_before_ll + lcount];
2279 current_substring += length_before_ll + 4;
2281 else if (this_argclass == wide_string_arg
2282 || this_argclass == wide_char_arg)
2284 /* Convert %ls or %lc to %s. */
2285 int length_before_ls = f - last_arg - 2;
2287 strncpy (current_substring, last_arg, length_before_ls);
2288 strcpy (current_substring + length_before_ls, "s");
2289 current_substring += length_before_ls + 2;
2293 strncpy (current_substring, last_arg, f - last_arg);
2294 current_substring += f - last_arg;
2296 *current_substring++ = '\0';
2298 argclass[nargs_wanted++] = this_argclass;
2301 /* Now, parse all arguments and evaluate them.
2302 Store the VALUEs in VAL_ARGS. */
2308 if (nargs == allocated_args)
2309 val_args = (struct value **) xrealloc ((char *) val_args,
2310 (allocated_args *= 2)
2311 * sizeof (struct value *));
2313 val_args[nargs] = parse_to_comma_and_eval (&s1);
2321 if (nargs != nargs_wanted)
2322 error (_("Wrong number of arguments for specified format-string"));
2324 /* Now actually print them. */
2325 current_substring = substrings;
2326 for (i = 0; i < nargs; i++)
2328 switch (argclass[i])
2336 tem = value_as_address (val_args[i]);
2338 /* This is a %s argument. Find the length of the string. */
2344 read_memory (tem + j, &c, 1);
2349 /* Copy the string contents into a string inside GDB. */
2350 str = (gdb_byte *) alloca (j + 1);
2352 read_memory (tem, str, j);
2355 fprintf_filtered (stream, current_substring, (char *) str);
2358 case wide_string_arg:
2363 struct gdbarch *gdbarch
2364 = get_type_arch (value_type (val_args[i]));
2365 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2366 struct type *wctype = lookup_typename (current_language, gdbarch,
2367 "wchar_t", NULL, 0);
2368 int wcwidth = TYPE_LENGTH (wctype);
2369 gdb_byte *buf = alloca (wcwidth);
2370 struct obstack output;
2371 struct cleanup *inner_cleanup;
2373 tem = value_as_address (val_args[i]);
2375 /* This is a %s argument. Find the length of the string. */
2376 for (j = 0;; j += wcwidth)
2379 read_memory (tem + j, buf, wcwidth);
2380 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0)
2384 /* Copy the string contents into a string inside GDB. */
2385 str = (gdb_byte *) alloca (j + wcwidth);
2387 read_memory (tem, str, j);
2388 memset (&str[j], 0, wcwidth);
2390 obstack_init (&output);
2391 inner_cleanup = make_cleanup_obstack_free (&output);
2393 convert_between_encodings (target_wide_charset (gdbarch),
2396 &output, translit_char);
2397 obstack_grow_str0 (&output, "");
2399 fprintf_filtered (stream, current_substring,
2400 obstack_base (&output));
2401 do_cleanups (inner_cleanup);
2406 struct gdbarch *gdbarch
2407 = get_type_arch (value_type (val_args[i]));
2408 struct type *wctype = lookup_typename (current_language, gdbarch,
2409 "wchar_t", NULL, 0);
2410 struct type *valtype;
2411 struct obstack output;
2412 struct cleanup *inner_cleanup;
2413 const gdb_byte *bytes;
2415 valtype = value_type (val_args[i]);
2416 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2417 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2418 error (_("expected wchar_t argument for %%lc"));
2420 bytes = value_contents (val_args[i]);
2422 obstack_init (&output);
2423 inner_cleanup = make_cleanup_obstack_free (&output);
2425 convert_between_encodings (target_wide_charset (gdbarch),
2427 bytes, TYPE_LENGTH (valtype),
2428 TYPE_LENGTH (valtype),
2429 &output, translit_char);
2430 obstack_grow_str0 (&output, "");
2432 fprintf_filtered (stream, current_substring,
2433 obstack_base (&output));
2434 do_cleanups (inner_cleanup);
2439 struct type *type = value_type (val_args[i]);
2443 /* If format string wants a float, unchecked-convert the value
2444 to floating point of the same size. */
2445 type = float_type_from_length (type);
2446 val = unpack_double (type, value_contents (val_args[i]), &inv);
2448 error (_("Invalid floating value found in program."));
2450 fprintf_filtered (stream, current_substring, (double) val);
2453 case long_double_arg:
2454 #ifdef HAVE_LONG_DOUBLE
2456 struct type *type = value_type (val_args[i]);
2460 /* If format string wants a float, unchecked-convert the value
2461 to floating point of the same size. */
2462 type = float_type_from_length (type);
2463 val = unpack_double (type, value_contents (val_args[i]), &inv);
2465 error (_("Invalid floating value found in program."));
2467 fprintf_filtered (stream, current_substring,
2472 error (_("long double not supported in printf"));
2475 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2477 long long val = value_as_long (val_args[i]);
2479 fprintf_filtered (stream, current_substring, val);
2483 error (_("long long not supported in printf"));
2487 int val = value_as_long (val_args[i]);
2489 fprintf_filtered (stream, current_substring, val);
2494 long val = value_as_long (val_args[i]);
2496 fprintf_filtered (stream, current_substring, val);
2500 /* Handles decimal floating values. */
2503 const gdb_byte *param_ptr = value_contents (val_args[i]);
2505 #if defined (PRINTF_HAS_DECFLOAT)
2506 /* If we have native support for Decimal floating
2507 printing, handle it here. */
2508 fprintf_filtered (stream, current_substring, param_ptr);
2511 /* As a workaround until vasprintf has native support for DFP
2512 we convert the DFP values to string and print them using
2513 the %s format specifier. */
2516 int nnull_chars = 0;
2518 /* Parameter data. */
2519 struct type *param_type = value_type (val_args[i]);
2520 unsigned int param_len = TYPE_LENGTH (param_type);
2521 struct gdbarch *gdbarch = get_type_arch (param_type);
2522 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2524 /* DFP output data. */
2525 struct value *dfp_value = NULL;
2529 struct type *dfp_type = NULL;
2530 char decstr[MAX_DECIMAL_STRING];
2532 /* Points to the end of the string so that we can go back
2533 and check for DFP length modifiers. */
2534 eos = current_substring + strlen (current_substring);
2536 /* Look for the float/double format specifier. */
2537 while (*eos != 'f' && *eos != 'e' && *eos != 'E'
2538 && *eos != 'g' && *eos != 'G')
2543 /* Search for the '%' char and extract the size and type of
2544 the output decimal value based on its modifiers
2545 (%Hf, %Df, %DDf). */
2546 while (*--sos != '%')
2551 dfp_type = builtin_type (gdbarch)->builtin_decfloat;
2553 else if (*sos == 'D' && *(sos - 1) == 'D')
2556 dfp_type = builtin_type (gdbarch)->builtin_declong;
2562 dfp_type = builtin_type (gdbarch)->builtin_decdouble;
2566 /* Replace %Hf, %Df and %DDf with %s's. */
2569 /* Go through the whole format string and pull the correct
2570 number of chars back to compensate for the change in the
2571 format specifier. */
2572 while (nnull_chars < nargs - i)
2580 /* Conversion between different DFP types. */
2581 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2582 decimal_convert (param_ptr, param_len, byte_order,
2583 dec, dfp_len, byte_order);
2585 /* If this is a non-trivial conversion, just output 0.
2586 A correct converted value can be displayed by explicitly
2587 casting to a DFP type. */
2588 decimal_from_string (dec, dfp_len, byte_order, "0");
2590 dfp_value = value_from_decfloat (dfp_type, dec);
2592 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2594 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr);
2596 /* Print the DFP value. */
2597 fprintf_filtered (stream, current_substring, decstr);
2605 /* We avoid the host's %p because pointers are too
2606 likely to be the wrong size. The only interesting
2607 modifier for %p is a width; extract that, and then
2608 handle %p as glibc would: %#x or a literal "(nil)". */
2610 char *p, *fmt, *fmt_p;
2611 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2612 long long val = value_as_long (val_args[i]);
2614 long val = value_as_long (val_args[i]);
2617 fmt = alloca (strlen (current_substring) + 5);
2619 /* Copy up to the leading %. */
2620 p = current_substring;
2624 int is_percent = (*p == '%');
2639 /* Copy any width. */
2640 while (*p >= '0' && *p < '9')
2643 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2646 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2652 fprintf_filtered (stream, fmt, val);
2658 fprintf_filtered (stream, fmt, "(nil)");
2664 internal_error (__FILE__, __LINE__,
2665 _("failed internal consistency check"));
2667 /* Skip to the next substring. */
2668 current_substring += strlen (current_substring) + 1;
2670 /* Print the portion of the format string after the last argument.
2671 Note that this will not include any ordinary %-specs, but it
2672 might include "%%". That is why we use printf_filtered and not
2673 puts_filtered here. Also, we pass a dummy argument because
2674 some platforms have modified GCC to include -Wformat-security
2675 by default, which will warn here if there is no argument. */
2676 fprintf_filtered (stream, last_arg, 0);
2678 do_cleanups (old_cleanups);
2681 /* Implement the "printf" command. */
2684 printf_command (char *arg, int from_tty)
2686 ui_printf (arg, gdb_stdout);
2689 /* Implement the "eval" command. */
2692 eval_command (char *arg, int from_tty)
2694 struct ui_file *ui_out = mem_fileopen ();
2695 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out);
2698 ui_printf (arg, ui_out);
2700 expanded = ui_file_xstrdup (ui_out, NULL);
2701 make_cleanup (xfree, expanded);
2703 execute_command (expanded, from_tty);
2705 do_cleanups (cleanups);
2709 _initialize_printcmd (void)
2711 struct cmd_list_element *c;
2713 current_display_number = -1;
2715 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2717 add_info ("address", address_info,
2718 _("Describe where symbol SYM is stored."));
2720 add_info ("symbol", sym_info, _("\
2721 Describe what symbol is at location ADDR.\n\
2722 Only for symbols with fixed locations (global or static scope)."));
2724 add_com ("x", class_vars, x_command, _("\
2725 Examine memory: x/FMT ADDRESS.\n\
2726 ADDRESS is an expression for the memory address to examine.\n\
2727 FMT is a repeat count followed by a format letter and a size letter.\n\
2728 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2729 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2730 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2731 The specified number of objects of the specified size are printed\n\
2732 according to the format.\n\n\
2733 Defaults for format and size letters are those previously used.\n\
2734 Default count is 1. Default address is following last thing printed\n\
2735 with this command or \"print\"."));
2738 add_com ("whereis", class_vars, whereis_command,
2739 _("Print line number and file of definition of variable."));
2742 add_info ("display", display_info, _("\
2743 Expressions to display when program stops, with code numbers."));
2745 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2746 Cancel some expressions to be displayed when program stops.\n\
2747 Arguments are the code numbers of the expressions to stop displaying.\n\
2748 No argument means cancel all automatic-display expressions.\n\
2749 \"delete display\" has the same effect as this command.\n\
2750 Do \"info display\" to see current list of code numbers."),
2753 add_com ("display", class_vars, display_command, _("\
2754 Print value of expression EXP each time the program stops.\n\
2755 /FMT may be used before EXP as in the \"print\" command.\n\
2756 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2757 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2758 and examining is done as in the \"x\" command.\n\n\
2759 With no argument, display all currently requested auto-display expressions.\n\
2760 Use \"undisplay\" to cancel display requests previously made."));
2762 add_cmd ("display", class_vars, enable_display_command, _("\
2763 Enable some expressions to be displayed when program stops.\n\
2764 Arguments are the code numbers of the expressions to resume displaying.\n\
2765 No argument means enable all automatic-display expressions.\n\
2766 Do \"info display\" to see current list of code numbers."), &enablelist);
2768 add_cmd ("display", class_vars, disable_display_command, _("\
2769 Disable some expressions to be displayed when program stops.\n\
2770 Arguments are the code numbers of the expressions to stop displaying.\n\
2771 No argument means disable all automatic-display expressions.\n\
2772 Do \"info display\" to see current list of code numbers."), &disablelist);
2774 add_cmd ("display", class_vars, undisplay_command, _("\
2775 Cancel some expressions to be displayed when program stops.\n\
2776 Arguments are the code numbers of the expressions to stop displaying.\n\
2777 No argument means cancel all automatic-display expressions.\n\
2778 Do \"info display\" to see current list of code numbers."), &deletelist);
2780 add_com ("printf", class_vars, printf_command, _("\
2781 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2782 This is useful for formatted output in user-defined commands."));
2784 add_com ("output", class_vars, output_command, _("\
2785 Like \"print\" but don't put in value history and don't print newline.\n\
2786 This is useful in user-defined commands."));
2788 add_prefix_cmd ("set", class_vars, set_command, _("\
2789 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2790 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2791 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2792 with $), a register (a few standard names starting with $), or an actual\n\
2793 variable in the program being debugged. EXP is any valid expression.\n\
2794 Use \"set variable\" for variables with names identical to set subcommands.\n\
2796 With a subcommand, this command modifies parts of the gdb environment.\n\
2797 You can see these environment settings with the \"show\" command."),
2798 &setlist, "set ", 1, &cmdlist);
2800 add_com ("assign", class_vars, set_command, _("\
2801 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2802 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2803 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2804 with $), a register (a few standard names starting with $), or an actual\n\
2805 variable in the program being debugged. EXP is any valid expression.\n\
2806 Use \"set variable\" for variables with names identical to set subcommands.\n\
2807 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2808 You can see these environment settings with the \"show\" command."));
2810 /* "call" is the same as "set", but handy for dbx users to call fns. */
2811 c = add_com ("call", class_vars, call_command, _("\
2812 Call a function in the program.\n\
2813 The argument is the function name and arguments, in the notation of the\n\
2814 current working language. The result is printed and saved in the value\n\
2815 history, if it is not void."));
2816 set_cmd_completer (c, expression_completer);
2818 add_cmd ("variable", class_vars, set_command, _("\
2819 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2820 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2821 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2822 with $), a register (a few standard names starting with $), or an actual\n\
2823 variable in the program being debugged. EXP is any valid expression.\n\
2824 This may usually be abbreviated to simply \"set\"."),
2827 c = add_com ("print", class_vars, print_command, _("\
2828 Print value of expression EXP.\n\
2829 Variables accessible are those of the lexical environment of the selected\n\
2830 stack frame, plus all those whose scope is global or an entire file.\n\
2832 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2833 $$NUM refers to NUM'th value back from the last one.\n\
2834 Names starting with $ refer to registers (with the values they would have\n\
2835 if the program were to return to the stack frame now selected, restoring\n\
2836 all registers saved by frames farther in) or else to debugger\n\
2837 \"convenience\" variables (any such name not a known register).\n\
2838 Use assignment expressions to give values to convenience variables.\n\
2840 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2841 @ is a binary operator for treating consecutive data objects\n\
2842 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2843 element is FOO, whose second element is stored in the space following\n\
2844 where FOO is stored, etc. FOO must be an expression whose value\n\
2845 resides in memory.\n\
2847 EXP may be preceded with /FMT, where FMT is a format letter\n\
2848 but no count or size letter (see \"x\" command)."));
2849 set_cmd_completer (c, expression_completer);
2850 add_com_alias ("p", "print", class_vars, 1);
2852 c = add_com ("inspect", class_vars, inspect_command, _("\
2853 Same as \"print\" command, except that if you are running in the epoch\n\
2854 environment, the value is printed in its own window."));
2855 set_cmd_completer (c, expression_completer);
2857 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2858 &max_symbolic_offset, _("\
2859 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2860 Show the largest offset that will be printed in <symbol+1234> form."), NULL,
2862 show_max_symbolic_offset,
2863 &setprintlist, &showprintlist);
2864 add_setshow_boolean_cmd ("symbol-filename", no_class,
2865 &print_symbol_filename, _("\
2866 Set printing of source filename and line number with <symbol>."), _("\
2867 Show printing of source filename and line number with <symbol>."), NULL,
2869 show_print_symbol_filename,
2870 &setprintlist, &showprintlist);
2872 add_com ("eval", no_class, eval_command, _("\
2873 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2874 a command line, and call it."));