1 /* Parser for linespec for the 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, 2007, 2008,
5 2009, 2010 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/>. */
31 #include "completer.h"
33 #include "cp-support.h"
34 #include "parser-defs.h"
36 #include "objc-lang.h"
38 #include "exceptions.h"
41 #include "mi/mi-cmds.h"
43 #include "arch-utils.h"
45 /* We share this one with symtab.c, but it is not exported widely. */
47 extern char *operator_chars (char *, char **);
49 /* Prototypes for local functions */
51 static void initialize_defaults (struct symtab **default_symtab,
54 static struct symtabs_and_lines decode_indirect (char **argptr);
56 static char *locate_first_half (char **argptr, int *is_quote_enclosed);
58 static struct symtabs_and_lines decode_objc (char **argptr,
60 struct symtab *file_symtab,
64 static struct symtabs_and_lines decode_compound (char **argptr,
71 static struct symbol *lookup_prefix_sym (char **argptr, char *p);
73 static struct symtabs_and_lines find_method (int funfirstline,
78 struct symbol *sym_class,
81 static void cplusplus_error (const char *name, const char *fmt, ...)
82 ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (2, 3);
84 static int total_number_of_methods (struct type *type);
86 static int find_methods (struct type *, char *,
87 enum language, struct symbol **);
89 static int add_matching_methods (int method_counter, struct type *t,
90 enum language language,
91 struct symbol **sym_arr);
93 static int add_constructors (int method_counter, struct type *t,
94 enum language language,
95 struct symbol **sym_arr);
97 static void build_canonical_line_spec (struct symtab_and_line *,
100 static char *find_toplevel_char (char *s, char c);
102 static int is_objc_method_format (const char *s);
104 static struct symtabs_and_lines decode_line_2 (struct symbol *[],
107 static struct symtab *symtab_from_filename (char **argptr,
108 char *p, int is_quote_enclosed,
112 symtabs_and_lines decode_all_digits (char **argptr,
113 struct symtab *default_symtab,
116 struct symtab *file_symtab,
119 static struct symtabs_and_lines decode_dollar (char *copy,
121 struct symtab *default_symtab,
123 struct symtab *file_symtab);
125 static int decode_label (char *copy, char ***canonical,
126 struct symtabs_and_lines *result);
128 static struct symtabs_and_lines decode_variable (char *copy,
131 struct symtab *file_symtab,
135 symtabs_and_lines symbol_found (int funfirstline,
139 struct symtab *file_symtab);
142 symtabs_and_lines minsym_found (int funfirstline,
143 struct minimal_symbol *msymbol);
145 /* Helper functions. */
147 /* Issue a helpful hint on using the command completion feature on
148 single quoted demangled C++ symbols as part of the completion
152 cplusplus_error (const char *name, const char *fmt, ...)
154 struct ui_file *tmp_stream;
157 tmp_stream = mem_fileopen ();
158 make_cleanup_ui_file_delete (tmp_stream);
163 va_start (args, fmt);
164 vfprintf_unfiltered (tmp_stream, fmt, args);
168 while (*name == '\'')
170 fprintf_unfiltered (tmp_stream,
171 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
172 "(Note leading single quote.)"),
175 message = ui_file_xstrdup (tmp_stream, NULL);
176 make_cleanup (xfree, message);
177 throw_error (NOT_FOUND_ERROR, "%s", message);
180 /* Return the number of methods described for TYPE, including the
181 methods from types it derives from. This can't be done in the symbol
182 reader because the type of the baseclass might still be stubbed
183 when the definition of the derived class is parsed. */
186 total_number_of_methods (struct type *type)
191 CHECK_TYPEDEF (type);
192 if (! HAVE_CPLUS_STRUCT (type))
194 count = TYPE_NFN_FIELDS_TOTAL (type);
196 for (n = 0; n < TYPE_N_BASECLASSES (type); n++)
197 count += total_number_of_methods (TYPE_BASECLASS (type, n));
202 /* Recursive helper function for decode_line_1.
203 Look for methods named NAME in type T.
204 Return number of matches.
205 Put matches in SYM_ARR, which should have been allocated with
206 a size of total_number_of_methods (T) * sizeof (struct symbol *).
207 Note that this function is g++ specific. */
210 find_methods (struct type *t, char *name, enum language language,
211 struct symbol **sym_arr)
215 char *class_name = type_name_no_tag (t);
217 /* Ignore this class if it doesn't have a name. This is ugly, but
218 unless we figure out how to get the physname without the name of
219 the class, then the loop can't do any good. */
221 && (lookup_symbol_in_language (class_name, (struct block *) NULL,
222 STRUCT_DOMAIN, language, (int *) NULL)))
225 int name_len = strlen (name);
229 /* Loop over each method name. At this level, all overloads of a name
230 are counted as a single name. There is an inner loop which loops over
233 for (method_counter = TYPE_NFN_FIELDS (t) - 1;
237 char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
240 if (strncmp (method_name, "__", 2) == 0 ||
241 strncmp (method_name, "op", 2) == 0 ||
242 strncmp (method_name, "type", 4) == 0)
244 if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI))
245 method_name = dem_opname;
246 else if (cplus_demangle_opname (method_name, dem_opname, 0))
247 method_name = dem_opname;
250 if (strcmp_iw (name, method_name) == 0)
251 /* Find all the overloaded methods with that name. */
252 i1 += add_matching_methods (method_counter, t, language,
254 else if (strncmp (class_name, name, name_len) == 0
255 && (class_name[name_len] == '\0'
256 || class_name[name_len] == '<'))
257 i1 += add_constructors (method_counter, t, language,
262 /* Only search baseclasses if there is no match yet, since names in
263 derived classes override those in baseclasses.
265 FIXME: The above is not true; it is only true of member functions
266 if they have the same number of arguments (??? - section 13.1 of the
267 ARM says the function members are not in the same scope but doesn't
268 really spell out the rules in a way I understand. In any case, if
269 the number of arguments differ this is a case in which we can overload
270 rather than hiding without any problem, and gcc 2.4.5 does overload
271 rather than hiding in this case). */
274 for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
275 i1 += find_methods (TYPE_BASECLASS (t, ibase), name,
276 language, sym_arr + i1);
281 /* Add the symbols associated to methods of the class whose type is T
282 and whose name matches the method indexed by METHOD_COUNTER in the
283 array SYM_ARR. Return the number of methods added. */
286 add_matching_methods (int method_counter, struct type *t,
287 enum language language, struct symbol **sym_arr)
292 for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
299 f = TYPE_FN_FIELDLIST1 (t, method_counter);
301 if (TYPE_FN_FIELD_STUB (f, field_counter))
305 tmp_name = gdb_mangle_name (t,
308 phys_name = alloca (strlen (tmp_name) + 1);
309 strcpy (phys_name, tmp_name);
313 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
315 sym_arr[i1] = lookup_symbol_in_language (phys_name,
323 /* This error message gets printed, but the method
324 still seems to be found
325 fputs_filtered("(Cannot find method ", gdb_stdout);
326 fprintf_symbol_filtered (gdb_stdout, phys_name,
328 DMGL_PARAMS | DMGL_ANSI);
329 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
337 /* Add the symbols associated to constructors of the class whose type
338 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
339 array SYM_ARR. Return the number of methods added. */
342 add_constructors (int method_counter, struct type *t,
343 enum language language, struct symbol **sym_arr)
348 /* For GCC 3.x and stabs, constructors and destructors
349 have names like __base_ctor and __complete_dtor.
350 Check the physname for now if we're looking for a
353 = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
360 f = TYPE_FN_FIELDLIST1 (t, method_counter);
362 /* GCC 3.x will never produce stabs stub methods, so
363 we don't need to handle this case. */
364 if (TYPE_FN_FIELD_STUB (f, field_counter))
366 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
367 if (! is_constructor_name (phys_name))
370 /* If this method is actually defined, include it in the
372 sym_arr[i1] = lookup_symbol_in_language (phys_name,
383 /* Helper function for decode_line_1.
384 Build a canonical line spec in CANONICAL if it is non-NULL and if
385 the SAL has a symtab.
386 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
387 If SYMNAME is NULL the line number from SAL is used and the canonical
388 line spec is `filename:linenum'. */
391 build_canonical_line_spec (struct symtab_and_line *sal, char *symname,
394 char **canonical_arr;
395 char *canonical_name;
397 struct symtab *s = sal->symtab;
399 if (s == (struct symtab *) NULL
400 || s->filename == (char *) NULL
401 || canonical == (char ***) NULL)
404 canonical_arr = (char **) xmalloc (sizeof (char *));
405 *canonical = canonical_arr;
407 filename = s->filename;
410 canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2);
411 sprintf (canonical_name, "%s:%s", filename, symname);
415 canonical_name = xmalloc (strlen (filename) + 30);
416 sprintf (canonical_name, "%s:%d", filename, sal->line);
418 canonical_arr[0] = canonical_name;
423 /* Find an instance of the character C in the string S that is outside
424 of all parenthesis pairs, single-quoted strings, and double-quoted
425 strings. Also, ignore the char within a template name, like a ','
426 within foo<int, int>. */
429 find_toplevel_char (char *s, char c)
431 int quoted = 0; /* zero if we're not in quotes;
432 '"' if we're in a double-quoted string;
433 '\'' if we're in a single-quoted string. */
434 int depth = 0; /* Number of unclosed parens we've seen. */
437 for (scan = s; *scan; scan++)
443 else if (*scan == '\\' && *(scan + 1))
446 else if (*scan == c && ! quoted && depth == 0)
448 else if (*scan == '"' || *scan == '\'')
450 else if (*scan == '(' || *scan == '<')
452 else if ((*scan == ')' || *scan == '>') && depth > 0)
459 /* Determines if the gives string corresponds to an Objective-C method
460 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
461 are allowed to have spaces and parentheses in them. */
464 is_objc_method_format (const char *s)
466 if (s == NULL || *s == '\0')
468 /* Handle arguments with the format FILENAME:SYMBOL. */
469 if ((s[0] == ':') && (strchr ("+-", s[1]) != NULL)
470 && (s[2] == '[') && strchr(s, ']'))
472 /* Handle arguments that are just SYMBOL. */
473 else if ((strchr ("+-", s[0]) != NULL) && (s[1] == '[') && strchr(s, ']'))
478 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
479 operate on (ask user if necessary).
480 If CANONICAL is non-NULL return a corresponding array of mangled names
481 as canonical line specs there. */
483 static struct symtabs_and_lines
484 decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline,
487 struct symtabs_and_lines values, return_values;
492 struct cleanup *old_chain;
493 char **canonical_arr = (char **) NULL;
494 const char *select_mode = multiple_symbols_select_mode ();
496 if (select_mode == multiple_symbols_cancel)
498 canceled because the command is ambiguous\n\
499 See set/show multiple-symbol."));
501 values.sals = (struct symtab_and_line *)
502 alloca (nelts * sizeof (struct symtab_and_line));
503 return_values.sals = (struct symtab_and_line *)
504 xmalloc (nelts * sizeof (struct symtab_and_line));
505 old_chain = make_cleanup (xfree, return_values.sals);
509 canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
510 make_cleanup (xfree, canonical_arr);
511 memset (canonical_arr, 0, nelts * sizeof (char *));
512 *canonical = canonical_arr;
518 init_sal (&return_values.sals[i]); /* Initialize to zeroes. */
519 init_sal (&values.sals[i]);
520 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
521 values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
525 /* If select_mode is "all", then do not print the multiple-choice
526 menu and act as if the user had chosen choice "1" (all). */
527 if (select_mode == multiple_symbols_all
528 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
533 printf_unfiltered (_("[0] cancel\n[1] all\n"));
536 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
538 if (values.sals[i].symtab)
539 printf_unfiltered ("[%d] %s at %s:%d\n",
541 SYMBOL_PRINT_NAME (sym_arr[i]),
542 values.sals[i].symtab->filename,
543 values.sals[i].line);
545 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"),
547 SYMBOL_PRINT_NAME (sym_arr[i]),
548 values.sals[i].line);
552 printf_unfiltered (_("?HERE\n"));
556 prompt = getenv ("PS2");
561 args = command_line_input (prompt, 0, "overload-choice");
564 if (args == 0 || *args == 0)
565 error_no_arg (_("one or more choice numbers"));
573 while (*arg1 >= '0' && *arg1 <= '9')
575 if (*arg1 && *arg1 != ' ' && *arg1 != '\t')
576 error (_("Arguments must be choice numbers."));
581 error (_("canceled"));
586 for (i = 0; i < nelts; i++)
588 if (canonical_arr[i] == NULL)
590 symname = SYMBOL_LINKAGE_NAME (sym_arr[i]);
591 canonical_arr[i] = xstrdup (symname);
595 memcpy (return_values.sals, values.sals,
596 (nelts * sizeof (struct symtab_and_line)));
597 return_values.nelts = nelts;
598 discard_cleanups (old_chain);
599 return return_values;
602 if (num >= nelts + 2)
604 printf_unfiltered (_("No choice number %d.\n"), num);
609 if (values.sals[num].pc)
613 symname = SYMBOL_LINKAGE_NAME (sym_arr[num]);
614 make_cleanup (xfree, symname);
615 canonical_arr[i] = xstrdup (symname);
617 return_values.sals[i++] = values.sals[num];
618 values.sals[num].pc = 0;
622 printf_unfiltered (_("duplicate request for %d ignored.\n"), num);
627 while (*args == ' ' || *args == '\t')
630 return_values.nelts = i;
631 discard_cleanups (old_chain);
632 return return_values;
635 /* A helper function for decode_line_1 and friends which skips P
636 past any method overload information at the beginning of P, e.g.,
637 "(const struct foo *)".
639 This function assumes that P has already been validated to contain
640 overload information, and it will assert if *P != '('. */
642 find_method_overload_end (char *p)
646 gdb_assert (*p == '(');
666 /* The parser of linespec itself. */
668 /* Parse a string that specifies a line number.
669 Pass the address of a char * variable; that variable will be
670 advanced over the characters actually parsed.
674 LINENUM -- that line number in current file. PC returned is 0.
675 FILE:LINENUM -- that line in that file. PC returned is 0.
676 FUNCTION -- line number of openbrace of that function.
677 PC returned is the start of the function.
678 LABEL -- a label in the current scope
679 VARIABLE -- line number of definition of that variable.
681 FILE:FUNCTION -- likewise, but prefer functions in that file.
682 *EXPR -- line in which address EXPR appears.
684 This may all be followed by an "if EXPR", which we ignore.
686 FUNCTION may be an undebuggable function found in minimal symbol table.
688 If the argument FUNFIRSTLINE is nonzero, we want the first line
689 of real code inside a function when a function is specified, and it is
690 not OK to specify a variable or type to get its line number.
692 DEFAULT_SYMTAB specifies the file to use if none is specified.
693 It defaults to current_source_symtab.
694 DEFAULT_LINE specifies the line number to use for relative
695 line numbers (that start with signs). Defaults to current_source_line.
696 If CANONICAL is non-NULL, store an array of strings containing the canonical
697 line specs there if necessary. Currently overloaded member functions and
698 line numbers or static functions without a filename yield a canonical
699 line spec. The array and the line spec strings are allocated on the heap,
700 it is the callers responsibility to free them.
702 Note that it is possible to return zero for the symtab
703 if no file is validly specified. Callers must check that.
704 Also, the line number returned may be invalid.
706 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
707 on whether or not failure occurs due to an unknown function or file. In the case
708 where failure does occur due to an unknown function or file, do not issue an error
711 /* We allow single quotes in various places. This is a hideous
712 kludge, which exists because the completer can't yet deal with the
713 lack of single quotes. FIXME: write a linespec_completer which we
714 can use as appropriate instead of make_symbol_completion_list. */
716 struct symtabs_and_lines
717 decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
718 int default_line, char ***canonical, int *not_found_ptr)
722 /* If a file name is specified, this is its symtab. */
723 struct symtab *file_symtab = NULL;
726 /* This says whether or not something in *ARGPTR is quoted with
727 completer_quotes (i.e. with single quotes). */
729 /* Is *ARGPTR is enclosed in double quotes? */
730 int is_quote_enclosed;
731 int is_objc_method = 0;
732 char *saved_arg = *argptr;
733 /* If IS_QUOTED, the end of the quoted bit. */
734 char *end_quote = NULL;
735 /* The "first half" of the linespec. */
741 /* Defaults have defaults. */
743 initialize_defaults (&default_symtab, &default_line);
745 /* See if arg is *PC. */
748 return decode_indirect (argptr);
751 && strchr (get_gdb_completer_quote_characters (),
754 end_quote = skip_quoted (*argptr);
756 /* Check to see if it's a multipart linespec (with colons or
759 /* Locate the end of the first half of the linespec.
760 After the call, for instance, if the argptr string is "foo.c:123"
761 p will point at "123". If there is only one part, like "foo", p
762 will point to "". If this is a C++ name, like "A::B::foo", p will
763 point to "::B::foo". Argptr is not changed by this call. */
765 first_half = p = locate_first_half (argptr, &is_quote_enclosed);
767 /* Check if this is an Objective-C method (anything that starts with
768 a '+' or '-' and a '['). */
769 if (is_objc_method_format (p))
772 /* Check if the symbol could be an Objective-C selector. */
775 struct symtabs_and_lines values;
777 values = decode_objc (argptr, funfirstline, NULL,
778 canonical, saved_arg);
779 if (values.sals != NULL)
783 /* Does it look like there actually were two parts? */
785 if (p[0] == ':' || p[0] == '.')
787 /* Is it a C++ or Java compound data structure?
788 The check on p[1] == ':' is capturing the case of "::",
789 since p[0]==':' was checked above.
790 Note that the call to decode_compound does everything
791 for us, including the lookup on the symbol table, so we
794 if (p[0] == '.' || p[1] == ':')
796 struct symtabs_and_lines values;
798 if (is_quote_enclosed)
800 values = decode_compound (argptr, funfirstline, canonical,
801 saved_arg, p, not_found_ptr);
802 if (is_quoted && **argptr == '\'')
803 *argptr = *argptr + 1;
807 /* No, the first part is a filename; set file_symtab to be that file's
808 symtab. Also, move argptr past the filename. */
810 file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed,
813 /* Check for single quotes on the non-filename part. */
816 is_quoted = (**argptr
817 && strchr (get_gdb_completer_quote_characters (),
820 end_quote = skip_quoted (*argptr);
824 /* file_symtab is specified file's symtab, or 0 if no file specified.
825 arg no longer contains the file name. */
827 /* If the filename was quoted, we must re-check the quotation. */
829 if (end_quote == first_half && *end_quote!= '\0')
831 is_quoted = (**argptr
832 && strchr (get_gdb_completer_quote_characters (),
835 end_quote = skip_quoted (*argptr);
838 /* Check whether arg is all digits (and sign). */
841 if (*q == '-' || *q == '+')
843 while (*q >= '0' && *q <= '9')
846 if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ','))
847 /* We found a token consisting of all digits -- at least one digit. */
848 return decode_all_digits (argptr, default_symtab, default_line,
849 canonical, file_symtab, q);
851 /* Arg token is not digits => try it as a variable name
852 Find the next token (everything up to end or next whitespace). */
854 if (**argptr == '$') /* May be a convenience variable. */
855 /* One or two $ chars possible. */
856 p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1));
861 error (_("Unmatched single quote."));
863 else if (is_objc_method)
865 /* allow word separators in method names for Obj-C */
866 p = skip_quoted_chars (*argptr, NULL, "");
870 p = skip_quoted (*argptr);
873 /* Keep any template parameters */
875 p = find_template_name_end (p);
877 /* Keep method overload information. */
879 p = find_method_overload_end (p);
881 /* Make sure we keep important kewords like "const" */
882 if (strncmp (p, " const", 6) == 0)
885 copy = (char *) alloca (p - *argptr + 1);
886 memcpy (copy, *argptr, p - *argptr);
887 copy[p - *argptr] = '\0';
890 && copy[0] == copy[p - *argptr - 1]
891 && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
893 copy[p - *argptr - 1] = '\0';
897 copy[p - *argptr - 1] = '\0';
898 while (*p == ' ' || *p == '\t')
902 /* If it starts with $: may be a legitimate variable or routine name
903 (e.g. HP-UX millicode routines such as $$dyncall), or it may
904 be history value, or it may be a convenience variable. */
907 return decode_dollar (copy, funfirstline, default_symtab,
908 canonical, file_symtab);
910 /* Try the token as a label, but only if no file was specified,
911 because we can only really find labels in the current scope. */
915 struct symtabs_and_lines label_result;
916 if (decode_label (copy, canonical, &label_result))
920 /* Look up that token as a variable.
921 If file specified, use that file's per-file block to start with. */
923 return decode_variable (copy, funfirstline, canonical,
924 file_symtab, not_found_ptr);
929 /* Now, more helper functions for decode_line_1. Some conventions
930 that these functions follow:
932 Decode_line_1 typically passes along some of its arguments or local
933 variables to the subfunctions. It passes the variables by
934 reference if they are modified by the subfunction, and by value
937 Some of the functions have side effects that don't arise from
938 variables that are passed by reference. In particular, if a
939 function is passed ARGPTR as an argument, it modifies what ARGPTR
940 points to; typically, it advances *ARGPTR past whatever substring
941 it has just looked at. (If it doesn't modify *ARGPTR, then the
942 function gets passed *ARGPTR instead, which is then called ARG.)
943 Also, functions that return a struct symtabs_and_lines may modify
944 CANONICAL, as in the description of decode_line_1.
946 If a function returns a struct symtabs_and_lines, then that struct
947 will immediately make its way up the call chain to be returned by
948 decode_line_1. In particular, all of the functions decode_XXX
949 calculate the appropriate struct symtabs_and_lines, under the
950 assumption that their argument is of the form XXX. */
952 /* First, some functions to initialize stuff at the beggining of the
956 initialize_defaults (struct symtab **default_symtab, int *default_line)
958 if (*default_symtab == 0)
960 /* Use whatever we have for the default source line. We don't use
961 get_current_or_default_symtab_and_line as it can recurse and call
963 struct symtab_and_line cursal =
964 get_current_source_symtab_and_line ();
966 *default_symtab = cursal.symtab;
967 *default_line = cursal.line;
973 /* Decode arg of the form *PC. */
975 static struct symtabs_and_lines
976 decode_indirect (char **argptr)
978 struct symtabs_and_lines values;
982 pc = parse_and_eval_address_1 (argptr);
984 values.sals = (struct symtab_and_line *)
985 xmalloc (sizeof (struct symtab_and_line));
988 values.sals[0] = find_pc_line (pc, 0);
989 values.sals[0].pc = pc;
990 values.sals[0].section = find_pc_overlay (pc);
991 values.sals[0].explicit_pc = 1;
998 /* Locate the first half of the linespec, ending in a colon, period,
999 or whitespace. (More or less.) Also, check to see if *ARGPTR is
1000 enclosed in double quotes; if so, set is_quote_enclosed, advance
1001 ARGPTR past that and zero out the trailing double quote.
1002 If ARGPTR is just a simple name like "main", p will point to ""
1006 locate_first_half (char **argptr, int *is_quote_enclosed)
1012 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1013 and we must isolate the first half. Outer layers will call again later
1014 for the second half.
1016 Don't count commas that appear in argument lists of overloaded
1017 functions, or in quoted strings. It's stupid to go to this much
1018 trouble when the rest of the function is such an obvious roach hotel. */
1019 ii = find_toplevel_char (*argptr, ',');
1020 has_comma = (ii != 0);
1022 /* Temporarily zap out second half to not confuse the code below.
1023 This is undone below. Do not change ii!! */
1029 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1030 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1036 *is_quote_enclosed = 1;
1042 *is_quote_enclosed = 0;
1043 if (strchr (get_gdb_completer_quote_characters (), *p))
1053 char *temp_end = find_template_name_end (p);
1056 error (_("malformed template specification in command"));
1059 /* Check for a colon and a plus or minus and a [ (which
1060 indicates an Objective-C method) */
1061 if (is_objc_method_format (p))
1065 /* Check for the end of the first half of the linespec. End of
1066 line, a tab, a double colon or the last single colon, or a
1067 space. But if enclosed in double quotes we do not break on
1072 && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
1073 || ((p[0] == ' ') && !*is_quote_enclosed))
1075 if (p[0] == '.' && strchr (p, ':') == NULL)
1077 /* Java qualified method. Find the *last* '.', since the
1078 others are package qualifiers. Stop at any open parenthesis
1079 which might provide overload information. */
1080 for (p1 = p; *p1 && *p1 != '('; p1++)
1088 while (p[0] == ' ' || p[0] == '\t')
1091 /* If the closing double quote was left at the end, remove it. */
1092 if (*is_quote_enclosed)
1094 char *closing_quote = strchr (p - 1, '"');
1096 if (closing_quote && closing_quote[1] == '\0')
1097 *closing_quote = '\0';
1100 /* Now that we've safely parsed the first half, put back ',' so
1101 outer layers can see it. */
1110 /* Here's where we recognise an Objective-C Selector. An Objective C
1111 selector may be implemented by more than one class, therefore it
1112 may represent more than one method/function. This gives us a
1113 situation somewhat analogous to C++ overloading. If there's more
1114 than one method that could represent the selector, then use some of
1115 the existing C++ code to let the user choose one. */
1117 struct symtabs_and_lines
1118 decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab,
1119 char ***canonical, char *saved_arg)
1121 struct symtabs_and_lines values;
1122 struct symbol **sym_arr = NULL;
1123 struct symbol *sym = NULL;
1125 struct block *block = NULL;
1132 if (file_symtab != NULL)
1133 block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), STATIC_BLOCK);
1136 enum language save_language;
1138 /* get_selected_block can change the current language when there is
1139 no selected frame yet. */
1140 save_language = current_language->la_language;
1141 block = get_selected_block (0);
1142 set_language (save_language);
1145 copy = find_imps (file_symtab, block, *argptr, NULL, &i1, &i2);
1149 sym_arr = (struct symbol **) alloca ((i1 + 1) * sizeof (struct symbol *));
1152 copy = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2);
1156 /* i1 now represents the TOTAL number of matches found.
1157 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1158 which will come first in the sym_arr array. Any low-level
1159 (minimal_symbol) matches will follow those. */
1165 /* Already a struct symbol. */
1170 sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0]));
1171 if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]), SYMBOL_LINKAGE_NAME (sym)) != 0)
1173 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym));
1178 values.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line));
1181 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1183 /* Canonicalize this, so it remains resolved for dylib loads. */
1184 values.sals[0] = find_function_start_sal (sym, funfirstline);
1185 build_canonical_line_spec (values.sals, SYMBOL_NATURAL_NAME (sym), canonical);
1189 /* The only match was a non-debuggable symbol, which might point
1190 to a function descriptor; resolve it to the actual code address
1192 struct minimal_symbol *msymbol = (struct minimal_symbol *)sym_arr[0];
1193 struct objfile *objfile = msymbol_objfile (msymbol);
1194 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1195 CORE_ADDR pc = SYMBOL_VALUE_ADDRESS (msymbol);
1197 pc = gdbarch_convert_from_func_ptr_addr (gdbarch, pc,
1200 init_sal (&values.sals[0]);
1201 values.sals[0].pc = pc;
1208 /* More than one match. The user must choose one or more. */
1209 return decode_line_2 (sym_arr, i2, funfirstline, canonical);
1215 /* This handles C++ and Java compound data structures. P should point
1216 at the first component separator, i.e. double-colon or period. As
1217 an example, on entrance to this function we could have ARGPTR
1218 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1220 static struct symtabs_and_lines
1221 decode_compound (char **argptr, int funfirstline, char ***canonical,
1222 char *saved_arg, char *p, int *not_found_ptr)
1224 struct symtabs_and_lines values;
1226 char *saved_arg2 = *argptr;
1230 struct symbol *sym_class;
1232 char *saved_java_argptr = NULL;
1234 /* First check for "global" namespace specification, of the form
1235 "::foo". If found, skip over the colons and jump to normal
1236 symbol processing. I.e. the whole line specification starts with
1237 "::" (note the condition that *argptr == p). */
1239 && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
1242 /* Given our example "AAA::inA::fun", we have two cases to consider:
1244 1) AAA::inA is the name of a class. In that case, presumably it
1245 has a method called "fun"; we then look up that method using
1248 2) AAA::inA isn't the name of a class. In that case, either the
1249 user made a typo or AAA::inA is the name of a namespace.
1250 Either way, we just look up AAA::inA::fun with lookup_symbol.
1252 Thus, our first task is to find everything before the last set of
1253 double-colons and figure out if it's the name of a class. So we
1254 first loop through all of the double-colons. */
1256 p2 = p; /* Save for restart. */
1258 /* This is very messy. Following the example above we have now the
1261 argptr -> "AAA::inA::fun
1262 saved_arg -> "AAA::inA::fun
1263 saved_arg2 -> "AAA::inA::fun
1264 p2 -> "::inA::fun". */
1266 /* In the loop below, with these strings, we'll make 2 passes, each
1267 is marked in comments.*/
1271 /* Move pointer up to next possible class/namespace token. */
1273 p = p2 + 1; /* Restart with old value +1. */
1275 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1276 i.e. if there is a double-colon, p will now point to the
1278 /* PASS2: p2->"::fun", p->":fun" */
1280 /* Move pointer ahead to next double-colon. */
1281 while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\'')
1284 if (current_language->la_language == language_cplus)
1285 p += cp_validate_operator (p);
1289 temp_end = find_template_name_end (p);
1291 error (_("malformed template specification in command"));
1294 /* Note that, since, at the start of this loop, p would be
1295 pointing to the second colon in a double-colon, we only
1296 satisfy the condition below if there is another
1297 double-colon to the right (after). I.e. there is another
1298 component that can be a class or a namespace. I.e, if at
1299 the beginning of this loop (PASS1), we had
1300 p->":inA::fun", we'll trigger this when p has been
1301 advanced to point to "::fun". */
1302 /* PASS2: we will not trigger this. */
1303 else if ((p[0] == ':') && (p[1] == ':'))
1304 break; /* Found double-colon. */
1306 /* PASS2: We'll keep getting here, until p->"", at which point
1307 we exit this loop. */
1312 break; /* Out of the while (1). This would happen
1313 for instance if we have looked up
1314 unsuccessfully all the components of the
1315 string, and p->""(PASS2) */
1317 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1319 /* Save restart for next time around. */
1321 /* Restore argptr as it was on entry to this function. */
1322 *argptr = saved_arg2;
1323 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1326 /* All ready for next pass through the loop. */
1330 /* Start of lookup in the symbol tables. */
1332 /* Lookup in the symbol table the substring between argptr and
1333 p. Note, this call changes the value of argptr. */
1334 /* Before the call, argptr->"AAA::inA::fun",
1335 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1337 sym_class = lookup_prefix_sym (argptr, p2);
1339 /* If sym_class has been found, and if "AAA::inA" is a class, then
1340 we're in case 1 above. So we look up "fun" as a method of that
1343 (t = check_typedef (SYMBOL_TYPE (sym_class)),
1344 (TYPE_CODE (t) == TYPE_CODE_STRUCT
1345 || TYPE_CODE (t) == TYPE_CODE_UNION)))
1347 /* Arg token is not digits => try it as a function name.
1348 Find the next token (everything up to end or next
1351 && strchr (get_gdb_completer_quote_characters (),
1354 p = skip_quoted (*argptr);
1355 *argptr = *argptr + 1;
1359 /* At this point argptr->"fun". */
1363 while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':'
1366 /* At this point p->"". String ended. */
1367 /* Nope, C++ operators could have spaces in them
1368 ("foo::operator <" or "foo::operator delete []").
1369 I apologize, this is a bit hacky... */
1370 if (current_language->la_language == language_cplus
1371 && *p == ' ' && p - 8 - *argptr + 1 > 0)
1373 /* The above loop has already swallowed "operator". */
1374 p += cp_validate_operator (p - 8) - 8;
1377 /* Keep any template parameters */
1379 p = find_template_name_end (p);
1381 /* Keep method overload information. */
1382 a = strchr (p, '(');
1384 p = find_method_overload_end (a);
1386 /* Make sure we keep important kewords like "const" */
1387 if (strncmp (p, " const", 6) == 0)
1390 /* Java may append typenames, so assume that if there is
1391 anything else left in *argptr, it must be a typename. */
1392 if (*p && current_language->la_language == language_java)
1399 copy = (char *) alloca (p2 - p + 1);
1400 memcpy (copy, p, p2 - p);
1401 copy[p2 - p] = '\0';
1402 type = lookup_typename (current_language, get_current_arch (),
1406 /* Save the location of this just in case this
1407 method/type combination isn't actually defined.
1408 It will be checked later. */
1409 saved_java_argptr = p;
1415 /* Allocate our own copy of the substring between argptr and
1417 copy = (char *) alloca (p - *argptr + 1);
1418 memcpy (copy, *argptr, p - *argptr);
1419 copy[p - *argptr] = '\0';
1421 && copy[p - *argptr - 1]
1422 && strchr (get_gdb_completer_quote_characters (),
1423 copy[p - *argptr - 1]) != NULL)
1424 copy[p - *argptr - 1] = '\0';
1426 /* At this point copy->"fun", p->"" */
1428 /* No line number may be specified. */
1429 while (*p == ' ' || *p == '\t')
1432 /* At this point arptr->"". */
1434 /* Look for copy as a method of sym_class. */
1435 /* At this point copy->"fun", sym_class is "AAA:inA",
1436 saved_arg->"AAA::inA::fun". This concludes the scanning of
1437 the string for possible components matches. If we find it
1438 here, we return. If not, and we are at the and of the string,
1439 we'll lookup the whole string in the symbol tables. */
1441 values = find_method (funfirstline, canonical, saved_arg,
1442 copy, t, sym_class, not_found_ptr);
1443 if (saved_java_argptr != NULL && values.nelts == 1)
1445 /* The user specified a specific return type for a java method.
1446 Double-check that it really is the one the user specified.
1447 [This is a necessary evil because strcmp_iw_ordered stops
1448 comparisons too prematurely.] */
1449 sym = find_pc_sect_function (values.sals[0].pc,
1450 values.sals[0].section);
1451 /* We just found a SAL, we had better be able to go backwards! */
1452 gdb_assert (sym != NULL);
1453 if (strcmp_iw (SYMBOL_LINKAGE_NAME (sym), saved_arg) != 0)
1455 xfree (values.sals);
1456 error (_("the class `%s' does not have any method instance named %s\n"),
1457 SYMBOL_PRINT_NAME (sym_class), copy);
1461 } /* End if symbol found */
1464 /* We couldn't find a class, so we're in case 2 above. We check the
1465 entire name as a symbol instead. */
1467 copy = (char *) alloca (p - saved_arg2 + 1);
1468 memcpy (copy, saved_arg2, p - saved_arg2);
1469 /* Note: if is_quoted should be true, we snuff out quote here
1471 copy[p - saved_arg2] = '\000';
1472 /* Set argptr to skip over the name. */
1473 *argptr = (*p == '\'') ? p + 1 : p;
1475 /* Look up entire name */
1476 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1478 return symbol_found (funfirstline, canonical, copy, sym, NULL);
1480 /* Couldn't find any interpretation as classes/namespaces, so give
1481 up. The quotes are important if copy is empty. */
1484 cplusplus_error (saved_arg,
1485 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1489 /* Next come some helper functions for decode_compound. */
1491 /* Return the symbol corresponding to the substring of *ARGPTR ending
1492 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1493 name in question, the compound object separator ("::" or "."), and
1494 whitespace. Note that *ARGPTR is changed whether or not the
1495 lookup_symbol call finds anything (i.e we return NULL). As an
1496 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1498 static struct symbol *
1499 lookup_prefix_sym (char **argptr, char *p)
1505 /* Extract the class name. */
1507 while (p != *argptr && p[-1] == ' ')
1509 copy = (char *) alloca (p - *argptr + 1);
1510 memcpy (copy, *argptr, p - *argptr);
1511 copy[p - *argptr] = 0;
1513 /* Discard the class name from the argptr. */
1514 p = p1 + (p1[0] == ':' ? 2 : 1);
1515 while (*p == ' ' || *p == '\t')
1519 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1520 argptr->"inA::fun" */
1522 sym = lookup_symbol (copy, 0, STRUCT_DOMAIN, 0);
1525 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1526 fail when the user attempts to lookup a method of a class
1527 via a typedef'd name (NOT via the class's name, which is already
1528 handled in symbol_matches_domain). So try the lookup again
1529 using VAR_DOMAIN (where typedefs live) and double-check that we
1530 found a struct/class type. */
1531 struct symbol *s = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1535 struct type *t = SYMBOL_TYPE (s);
1538 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
1546 /* This finds the method COPY in the class whose type is T and whose
1547 symbol is SYM_CLASS. */
1549 static struct symtabs_and_lines
1550 find_method (int funfirstline, char ***canonical, char *saved_arg,
1551 char *copy, struct type *t, struct symbol *sym_class, int *not_found_ptr)
1553 struct symtabs_and_lines values;
1554 struct symbol *sym = NULL;
1555 int i1; /* Counter for the symbol array. */
1556 struct symbol **sym_arr = alloca (total_number_of_methods (t)
1557 * sizeof (struct symbol *));
1559 /* Find all methods with a matching name, and put them in
1562 i1 = find_methods (t, copy, SYMBOL_LANGUAGE (sym_class), sym_arr);
1566 /* There is exactly one field with that name. */
1569 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1571 values.sals = (struct symtab_and_line *)
1572 xmalloc (sizeof (struct symtab_and_line));
1574 values.sals[0] = find_function_start_sal (sym,
1586 /* If we were given a specific overload instance, use that
1587 (or error if no matches were found). Otherwise ask the user
1588 which one to use. */
1589 if (strchr (saved_arg, '(') != NULL)
1593 for (i = 0; i < i1; ++i)
1595 char *name = saved_arg;
1596 char *canon = cp_canonicalize_string (name);
1601 if (strcmp_iw (name, SYMBOL_LINKAGE_NAME (sym_arr[i])) == 0)
1603 values.sals = (struct symtab_and_line *)
1604 xmalloc (sizeof (struct symtab_and_line));
1606 values.sals[0] = find_function_start_sal (sym_arr[i],
1617 error (_("the class `%s' does not have any method instance named %s\n"),
1618 SYMBOL_PRINT_NAME (sym_class), copy);
1621 return decode_line_2 (sym_arr, i1, funfirstline, canonical);
1628 cplusplus_error (saved_arg,
1629 "the class `%s' does not have destructor defined\n",
1630 SYMBOL_PRINT_NAME (sym_class));
1632 cplusplus_error (saved_arg,
1633 "the class %s does not have any method named %s\n",
1634 SYMBOL_PRINT_NAME (sym_class), copy);
1640 /* Return the symtab associated to the filename given by the substring
1641 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1642 NOT_FOUND_PTR is not null and the source file is not found, store
1643 boolean true at the location pointed to and do not issue an
1646 static struct symtab *
1647 symtab_from_filename (char **argptr, char *p, int is_quote_enclosed,
1652 struct symtab *file_symtab;
1655 while (p != *argptr && p[-1] == ' ')
1657 if ((*p == '"') && is_quote_enclosed)
1659 copy = (char *) alloca (p - *argptr + 1);
1660 memcpy (copy, *argptr, p - *argptr);
1661 /* It may have the ending quote right after the file name. */
1662 if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
1663 || copy[p - *argptr - 1] == '\'')
1664 copy[p - *argptr - 1] = 0;
1666 copy[p - *argptr] = 0;
1668 /* Find that file's data. */
1669 file_symtab = lookup_symtab (copy);
1670 if (file_symtab == 0)
1674 if (!have_full_symbols () && !have_partial_symbols ())
1675 throw_error (NOT_FOUND_ERROR,
1676 _("No symbol table is loaded. Use the \"file\" command."));
1677 throw_error (NOT_FOUND_ERROR, _("No source file named %s."), copy);
1680 /* Discard the file name from the arg. */
1682 while (*p == ' ' || *p == '\t')
1691 /* This decodes a line where the argument is all digits (possibly
1692 preceded by a sign). Q should point to the end of those digits;
1693 the other arguments are as usual. */
1695 static struct symtabs_and_lines
1696 decode_all_digits (char **argptr, struct symtab *default_symtab,
1697 int default_line, char ***canonical,
1698 struct symtab *file_symtab, char *q)
1701 struct symtabs_and_lines values;
1702 struct symtab_and_line val;
1710 /* We might need a canonical line spec if no file was specified. */
1711 int need_canonical = (file_symtab == NULL) ? 1 : 0;
1715 val.pspace = current_program_space;
1717 /* This is where we need to make sure that we have good defaults.
1718 We must guarantee that this section of code is never executed
1719 when we are called with just a function name, since
1720 set_default_source_symtab_and_line uses
1721 select_source_symtab that calls us with such an argument. */
1723 if (file_symtab == 0 && default_symtab == 0)
1725 /* Make sure we have at least a default source file. */
1726 set_default_source_symtab_and_line ();
1727 initialize_defaults (&default_symtab, &default_line);
1730 if (**argptr == '+')
1731 sign = plus, (*argptr)++;
1732 else if (**argptr == '-')
1733 sign = minus, (*argptr)++;
1734 val.line = atoi (*argptr);
1740 if (file_symtab == 0)
1741 val.line = default_line + val.line;
1746 if (file_symtab == 0)
1747 val.line = default_line - val.line;
1752 break; /* No need to adjust val.line. */
1755 while (*q == ' ' || *q == '\t')
1758 if (file_symtab == 0)
1759 file_symtab = default_symtab;
1761 /* It is possible that this source file has more than one symtab,
1762 and that the new line number specification has moved us from the
1763 default (in file_symtab) to a new one. */
1764 val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL);
1765 if (val.symtab == 0)
1766 val.symtab = file_symtab;
1768 val.pspace = SYMTAB_PSPACE (val.symtab);
1770 values.sals = (struct symtab_and_line *)
1771 xmalloc (sizeof (struct symtab_and_line));
1772 values.sals[0] = val;
1775 build_canonical_line_spec (values.sals, NULL, canonical);
1776 values.sals[0].explicit_line = 1;
1782 /* Decode a linespec starting with a dollar sign. */
1784 static struct symtabs_and_lines
1785 decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
1786 char ***canonical, struct symtab *file_symtab)
1790 int need_canonical = 0;
1791 struct symtabs_and_lines values;
1792 struct symtab_and_line val;
1795 struct minimal_symbol *msymbol;
1797 p = (copy[1] == '$') ? copy + 2 : copy + 1;
1798 while (*p >= '0' && *p <= '9')
1800 if (!*p) /* Reached end of token without hitting non-digit. */
1802 /* We have a value history reference. */
1803 struct value *val_history;
1805 sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
1806 val_history = access_value_history ((copy[1] == '$') ? -index : index);
1807 if (TYPE_CODE (value_type (val_history)) != TYPE_CODE_INT)
1808 error (_("History values used in line specs must have integer values."));
1809 valx = value_as_long (val_history);
1813 /* Not all digits -- may be user variable/function or a
1814 convenience variable. */
1816 /* Look up entire name as a symbol first. */
1817 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1818 file_symtab = (struct symtab *) NULL;
1820 /* Symbol was found --> jump to normal symbol processing. */
1822 return symbol_found (funfirstline, canonical, copy, sym, NULL);
1824 /* If symbol was not found, look in minimal symbol tables. */
1825 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1826 /* Min symbol was found --> jump to minsym processing. */
1828 return minsym_found (funfirstline, msymbol);
1830 /* Not a user variable or function -- must be convenience variable. */
1831 if (!get_internalvar_integer (lookup_internalvar (copy + 1), &valx))
1832 error (_("Convenience variables used in line specs must have integer values."));
1837 /* Either history value or convenience value from above, in valx. */
1838 val.symtab = file_symtab ? file_symtab : default_symtab;
1841 val.pspace = current_program_space;
1843 values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
1844 values.sals[0] = val;
1848 build_canonical_line_spec (values.sals, NULL, canonical);
1855 /* A helper for decode_line_1 that tries to find a label. The label
1856 is searched for in the current block.
1857 COPY is the name of the label to find.
1858 CANONICAL is the same as the "canonical" argument to decode_line_1.
1859 RESULT is a pointer to a symtabs_and_lines structure which will be
1860 filled in on success.
1861 This function returns 1 if a label was found, 0 otherwise. */
1864 decode_label (char *copy, char ***canonical, struct symtabs_and_lines *result)
1868 sym = lookup_symbol (copy, get_selected_block (0), LABEL_DOMAIN, 0);
1871 *result = symbol_found (0, canonical, copy, sym, NULL);
1876 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1877 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1878 the function cannot be found, store boolean true in the location pointed to
1879 and do not issue an error message. */
1881 static struct symtabs_and_lines
1882 decode_variable (char *copy, int funfirstline, char ***canonical,
1883 struct symtab *file_symtab, int *not_found_ptr)
1886 struct minimal_symbol *msymbol;
1888 sym = lookup_symbol (copy,
1890 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab),
1892 : get_selected_block (0)),
1896 return symbol_found (funfirstline, canonical, copy, sym, file_symtab);
1898 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1900 if (msymbol != NULL)
1901 return minsym_found (funfirstline, msymbol);
1906 if (!have_full_symbols ()
1907 && !have_partial_symbols ()
1908 && !have_minimal_symbols ())
1909 throw_error (NOT_FOUND_ERROR,
1910 _("No symbol table is loaded. Use the \"file\" command."));
1911 throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy);
1917 /* Now come some functions that are called from multiple places within
1920 /* We've found a symbol SYM to associate with our linespec; build a
1921 corresponding struct symtabs_and_lines. */
1923 static struct symtabs_and_lines
1924 symbol_found (int funfirstline, char ***canonical, char *copy,
1925 struct symbol *sym, struct symtab *file_symtab)
1927 struct symtabs_and_lines values;
1929 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
1931 /* Arg is the name of a function */
1932 values.sals = (struct symtab_and_line *)
1933 xmalloc (sizeof (struct symtab_and_line));
1934 values.sals[0] = find_function_start_sal (sym, funfirstline);
1937 /* Don't use the SYMBOL_LINE; if used at all it points to
1938 the line containing the parameters or thereabouts, not
1939 the first line of code. */
1941 /* We might need a canonical line spec if it is a static
1943 if (file_symtab == 0)
1945 struct blockvector *bv = BLOCKVECTOR (SYMBOL_SYMTAB (sym));
1946 struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1948 if (lookup_block_symbol (b, copy, VAR_DOMAIN) != NULL)
1949 build_canonical_line_spec (values.sals, copy, canonical);
1955 if (funfirstline && SYMBOL_CLASS (sym) != LOC_LABEL)
1956 error (_("\"%s\" is not a function"), copy);
1957 else if (SYMBOL_LINE (sym) != 0)
1959 /* We know its line number. */
1960 values.sals = (struct symtab_and_line *)
1961 xmalloc (sizeof (struct symtab_and_line));
1963 memset (&values.sals[0], 0, sizeof (values.sals[0]));
1964 values.sals[0].symtab = SYMBOL_SYMTAB (sym);
1965 values.sals[0].line = SYMBOL_LINE (sym);
1966 values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
1970 /* This can happen if it is compiled with a compiler which doesn't
1971 put out line numbers for variables. */
1972 /* FIXME: Shouldn't we just set .line and .symtab to zero
1973 and return? For example, "info line foo" could print
1975 error (_("Line number not known for symbol \"%s\""), copy);
1979 /* We've found a minimal symbol MSYMBOL to associate with our
1980 linespec; build a corresponding struct symtabs_and_lines. */
1982 static struct symtabs_and_lines
1983 minsym_found (int funfirstline, struct minimal_symbol *msymbol)
1985 struct objfile *objfile = msymbol_objfile (msymbol);
1986 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1987 struct symtabs_and_lines values;
1990 values.sals = (struct symtab_and_line *)
1991 xmalloc (sizeof (struct symtab_and_line));
1992 values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
1993 (struct obj_section *) 0, 0);
1994 values.sals[0].section = SYMBOL_OBJ_SECTION (msymbol);
1996 /* The minimal symbol might point to a function descriptor;
1997 resolve it to the actual code address instead. */
1998 pc = gdbarch_convert_from_func_ptr_addr (gdbarch,
2001 if (pc != values.sals[0].pc)
2002 values.sals[0] = find_pc_sect_line (pc, NULL, 0);
2005 skip_prologue_sal (&values.sals[0]);