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, 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/>. */
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)
497 error (_("canceled because the command is ambiguous\n"
498 "See set/show multiple-symbol."));
500 values.sals = (struct symtab_and_line *)
501 alloca (nelts * sizeof (struct symtab_and_line));
502 return_values.sals = (struct symtab_and_line *)
503 xmalloc (nelts * sizeof (struct symtab_and_line));
504 old_chain = make_cleanup (xfree, return_values.sals);
508 canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
509 make_cleanup (xfree, canonical_arr);
510 memset (canonical_arr, 0, nelts * sizeof (char *));
511 *canonical = canonical_arr;
517 init_sal (&return_values.sals[i]); /* Initialize to zeroes. */
518 init_sal (&values.sals[i]);
519 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
520 values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
524 /* If select_mode is "all", then do not print the multiple-choice
525 menu and act as if the user had chosen choice "1" (all). */
526 if (select_mode == multiple_symbols_all
527 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
532 printf_unfiltered (_("[0] cancel\n[1] all\n"));
535 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
537 if (values.sals[i].symtab)
538 printf_unfiltered ("[%d] %s at %s:%d\n",
540 SYMBOL_PRINT_NAME (sym_arr[i]),
541 values.sals[i].symtab->filename,
542 values.sals[i].line);
544 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? "
545 "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"),
628 while (*args == ' ' || *args == '\t')
631 return_values.nelts = i;
632 discard_cleanups (old_chain);
633 return return_values;
636 /* A helper function for decode_line_1 and friends which skips P
637 past any method overload information at the beginning of P, e.g.,
638 "(const struct foo *)".
640 This function assumes that P has already been validated to contain
641 overload information, and it will assert if *P != '('. */
643 find_method_overload_end (char *p)
647 gdb_assert (*p == '(');
667 /* The parser of linespec itself. */
669 /* Parse a string that specifies a line number.
670 Pass the address of a char * variable; that variable will be
671 advanced over the characters actually parsed.
675 LINENUM -- that line number in current file. PC returned is 0.
676 FILE:LINENUM -- that line in that file. PC returned is 0.
677 FUNCTION -- line number of openbrace of that function.
678 PC returned is the start of the function.
679 LABEL -- a label in the current scope
680 VARIABLE -- line number of definition of that variable.
682 FILE:FUNCTION -- likewise, but prefer functions in that file.
683 *EXPR -- line in which address EXPR appears.
685 This may all be followed by an "if EXPR", which we ignore.
687 FUNCTION may be an undebuggable function found in minimal symbol table.
689 If the argument FUNFIRSTLINE is nonzero, we want the first line
690 of real code inside a function when a function is specified, and it is
691 not OK to specify a variable or type to get its line number.
693 DEFAULT_SYMTAB specifies the file to use if none is specified.
694 It defaults to current_source_symtab.
695 DEFAULT_LINE specifies the line number to use for relative
696 line numbers (that start with signs). Defaults to current_source_line.
697 If CANONICAL is non-NULL, store an array of strings containing the canonical
698 line specs there if necessary. Currently overloaded member functions and
699 line numbers or static functions without a filename yield a canonical
700 line spec. The array and the line spec strings are allocated on the heap,
701 it is the callers responsibility to free them.
703 Note that it is possible to return zero for the symtab
704 if no file is validly specified. Callers must check that.
705 Also, the line number returned may be invalid.
707 If NOT_FOUND_PTR is not null, store a boolean true/false value at
708 the location, based on whether or not failure occurs due to an
709 unknown function or file. In the case where failure does occur due
710 to an unknown function or file, do not issue an error message. */
712 /* We allow single quotes in various places. This is a hideous
713 kludge, which exists because the completer can't yet deal with the
714 lack of single quotes. FIXME: write a linespec_completer which we
715 can use as appropriate instead of make_symbol_completion_list. */
717 struct symtabs_and_lines
718 decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
719 int default_line, char ***canonical, int *not_found_ptr)
723 /* If a file name is specified, this is its symtab. */
724 struct symtab *file_symtab = NULL;
727 /* This says whether or not something in *ARGPTR is quoted with
728 completer_quotes (i.e. with single quotes). */
730 /* Is *ARGPTR is enclosed in double quotes? */
731 int is_quote_enclosed;
732 int is_objc_method = 0;
733 char *saved_arg = *argptr;
734 /* If IS_QUOTED, the end of the quoted bit. */
735 char *end_quote = NULL;
736 /* The "first half" of the linespec. */
742 /* Defaults have defaults. */
744 initialize_defaults (&default_symtab, &default_line);
746 /* See if arg is *PC. */
751 return decode_indirect (argptr);
753 is_quoted = (strchr (get_gdb_completer_quote_characters (),
758 end_quote = skip_quoted (*argptr);
760 /* Check to see if it's a multipart linespec (with colons or
763 /* Locate the end of the first half of the linespec.
764 After the call, for instance, if the argptr string is "foo.c:123"
765 p will point at "123". If there is only one part, like "foo", p
766 will point to "". If this is a C++ name, like "A::B::foo", p will
767 point to "::B::foo". Argptr is not changed by this call. */
769 first_half = p = locate_first_half (argptr, &is_quote_enclosed);
771 /* Check if this is an Objective-C method (anything that starts with
772 a '+' or '-' and a '['). */
773 if (is_objc_method_format (p))
776 /* Check if the symbol could be an Objective-C selector. */
779 struct symtabs_and_lines values;
781 values = decode_objc (argptr, funfirstline, NULL,
782 canonical, saved_arg);
783 if (values.sals != NULL)
787 /* Does it look like there actually were two parts? */
789 if (p[0] == ':' || p[0] == '.')
791 /* Is it a C++ or Java compound data structure?
792 The check on p[1] == ':' is capturing the case of "::",
793 since p[0]==':' was checked above.
794 Note that the call to decode_compound does everything
795 for us, including the lookup on the symbol table, so we
798 if (p[0] == '.' || p[1] == ':')
800 struct symtabs_and_lines values;
802 if (is_quote_enclosed)
804 values = decode_compound (argptr, funfirstline, canonical,
805 saved_arg, p, not_found_ptr);
806 if (is_quoted && **argptr == '\'')
807 *argptr = *argptr + 1;
811 /* No, the first part is a filename; set file_symtab to be that file's
812 symtab. Also, move argptr past the filename. */
814 file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed,
817 /* Check for single quotes on the non-filename part. */
820 is_quoted = (**argptr
821 && strchr (get_gdb_completer_quote_characters (),
824 end_quote = skip_quoted (*argptr);
828 /* file_symtab is specified file's symtab, or 0 if no file specified.
829 arg no longer contains the file name. */
831 /* If the filename was quoted, we must re-check the quotation. */
833 if (end_quote == first_half && *end_quote!= '\0')
835 is_quoted = (**argptr
836 && strchr (get_gdb_completer_quote_characters (),
839 end_quote = skip_quoted (*argptr);
842 /* Check whether arg is all digits (and sign). */
845 if (*q == '-' || *q == '+')
847 while (*q >= '0' && *q <= '9')
850 if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ','))
851 /* We found a token consisting of all digits -- at least one digit. */
852 return decode_all_digits (argptr, default_symtab, default_line,
853 canonical, file_symtab, q);
855 /* Arg token is not digits => try it as a variable name
856 Find the next token (everything up to end or next whitespace). */
858 if (**argptr == '$') /* May be a convenience variable. */
859 /* One or two $ chars possible. */
860 p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1));
865 error (_("Unmatched single quote."));
867 else if (is_objc_method)
869 /* allow word separators in method names for Obj-C. */
870 p = skip_quoted_chars (*argptr, NULL, "");
874 p = skip_quoted (*argptr);
877 /* Keep any template parameters. */
879 p = find_template_name_end (p);
881 /* Keep method overload information. */
883 p = find_method_overload_end (p);
885 /* Make sure we keep important kewords like "const". */
886 if (strncmp (p, " const", 6) == 0)
889 copy = (char *) alloca (p - *argptr + 1);
890 memcpy (copy, *argptr, p - *argptr);
891 copy[p - *argptr] = '\0';
894 && copy[0] == copy[p - *argptr - 1]
895 && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
897 copy[p - *argptr - 1] = '\0';
901 copy[p - *argptr - 1] = '\0';
902 while (*p == ' ' || *p == '\t')
906 /* If it starts with $: may be a legitimate variable or routine name
907 (e.g. HP-UX millicode routines such as $$dyncall), or it may
908 be history value, or it may be a convenience variable. */
911 return decode_dollar (copy, funfirstline, default_symtab,
912 canonical, file_symtab);
914 /* Try the token as a label, but only if no file was specified,
915 because we can only really find labels in the current scope. */
919 struct symtabs_and_lines label_result;
920 if (decode_label (copy, canonical, &label_result))
924 /* Look up that token as a variable.
925 If file specified, use that file's per-file block to start with. */
927 return decode_variable (copy, funfirstline, canonical,
928 file_symtab, not_found_ptr);
933 /* Now, more helper functions for decode_line_1. Some conventions
934 that these functions follow:
936 Decode_line_1 typically passes along some of its arguments or local
937 variables to the subfunctions. It passes the variables by
938 reference if they are modified by the subfunction, and by value
941 Some of the functions have side effects that don't arise from
942 variables that are passed by reference. In particular, if a
943 function is passed ARGPTR as an argument, it modifies what ARGPTR
944 points to; typically, it advances *ARGPTR past whatever substring
945 it has just looked at. (If it doesn't modify *ARGPTR, then the
946 function gets passed *ARGPTR instead, which is then called ARG.)
947 Also, functions that return a struct symtabs_and_lines may modify
948 CANONICAL, as in the description of decode_line_1.
950 If a function returns a struct symtabs_and_lines, then that struct
951 will immediately make its way up the call chain to be returned by
952 decode_line_1. In particular, all of the functions decode_XXX
953 calculate the appropriate struct symtabs_and_lines, under the
954 assumption that their argument is of the form XXX. */
956 /* First, some functions to initialize stuff at the beggining of the
960 initialize_defaults (struct symtab **default_symtab, int *default_line)
962 if (*default_symtab == 0)
964 /* Use whatever we have for the default source line. We don't use
965 get_current_or_default_symtab_and_line as it can recurse and call
967 struct symtab_and_line cursal =
968 get_current_source_symtab_and_line ();
970 *default_symtab = cursal.symtab;
971 *default_line = cursal.line;
977 /* Decode arg of the form *PC. */
979 static struct symtabs_and_lines
980 decode_indirect (char **argptr)
982 struct symtabs_and_lines values;
986 pc = parse_and_eval_address_1 (argptr);
988 values.sals = (struct symtab_and_line *)
989 xmalloc (sizeof (struct symtab_and_line));
992 values.sals[0] = find_pc_line (pc, 0);
993 values.sals[0].pc = pc;
994 values.sals[0].section = find_pc_overlay (pc);
995 values.sals[0].explicit_pc = 1;
1002 /* Locate the first half of the linespec, ending in a colon, period,
1003 or whitespace. (More or less.) Also, check to see if *ARGPTR is
1004 enclosed in double quotes; if so, set is_quote_enclosed, advance
1005 ARGPTR past that and zero out the trailing double quote.
1006 If ARGPTR is just a simple name like "main", p will point to ""
1010 locate_first_half (char **argptr, int *is_quote_enclosed)
1016 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1017 and we must isolate the first half. Outer layers will call again later
1018 for the second half.
1020 Don't count commas that appear in argument lists of overloaded
1021 functions, or in quoted strings. It's stupid to go to this much
1022 trouble when the rest of the function is such an obvious roach hotel. */
1023 ii = find_toplevel_char (*argptr, ',');
1024 has_comma = (ii != 0);
1026 /* Temporarily zap out second half to not confuse the code below.
1027 This is undone below. Do not change ii!! */
1033 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1034 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1040 *is_quote_enclosed = 1;
1046 *is_quote_enclosed = 0;
1047 if (strchr (get_gdb_completer_quote_characters (), *p))
1057 char *temp_end = find_template_name_end (p);
1060 error (_("malformed template specification in command"));
1063 /* Check for a colon and a plus or minus and a [ (which
1064 indicates an Objective-C method). */
1065 if (is_objc_method_format (p))
1069 /* Check for the end of the first half of the linespec. End of
1070 line, a tab, a double colon or the last single colon, or a
1071 space. But if enclosed in double quotes we do not break on
1076 && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
1077 || ((p[0] == ' ') && !*is_quote_enclosed))
1079 if (p[0] == '.' && strchr (p, ':') == NULL)
1081 /* Java qualified method. Find the *last* '.', since the
1082 others are package qualifiers. Stop at any open parenthesis
1083 which might provide overload information. */
1084 for (p1 = p; *p1 && *p1 != '('; p1++)
1092 while (p[0] == ' ' || p[0] == '\t')
1095 /* If the closing double quote was left at the end, remove it. */
1096 if (*is_quote_enclosed)
1098 char *closing_quote = strchr (p - 1, '"');
1100 if (closing_quote && closing_quote[1] == '\0')
1101 *closing_quote = '\0';
1104 /* Now that we've safely parsed the first half, put back ',' so
1105 outer layers can see it. */
1114 /* Here's where we recognise an Objective-C Selector. An Objective C
1115 selector may be implemented by more than one class, therefore it
1116 may represent more than one method/function. This gives us a
1117 situation somewhat analogous to C++ overloading. If there's more
1118 than one method that could represent the selector, then use some of
1119 the existing C++ code to let the user choose one. */
1121 struct symtabs_and_lines
1122 decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab,
1123 char ***canonical, char *saved_arg)
1125 struct symtabs_and_lines values;
1126 struct symbol **sym_arr = NULL;
1127 struct symbol *sym = NULL;
1128 struct block *block = NULL;
1135 if (file_symtab != NULL)
1136 block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), STATIC_BLOCK);
1139 enum language save_language;
1141 /* get_selected_block can change the current language when there is
1142 no selected frame yet. */
1143 save_language = current_language->la_language;
1144 block = get_selected_block (0);
1145 set_language (save_language);
1148 find_imps (file_symtab, block, *argptr, NULL, &i1, &i2);
1152 sym_arr = (struct symbol **)
1153 alloca ((i1 + 1) * sizeof (struct symbol *));
1156 *argptr = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2);
1159 /* i1 now represents the TOTAL number of matches found.
1160 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1161 which will come first in the sym_arr array. Any low-level
1162 (minimal_symbol) matches will follow those. */
1168 /* Already a struct symbol. */
1173 sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0]));
1174 if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]),
1175 SYMBOL_LINKAGE_NAME (sym)) != 0)
1177 warning (_("debugging symbol \"%s\" does "
1178 "not match selector; ignoring"),
1179 SYMBOL_LINKAGE_NAME (sym));
1184 values.sals = (struct symtab_and_line *)
1185 xmalloc (sizeof (struct symtab_and_line));
1188 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1190 /* Canonicalize this, so it remains resolved for dylib loads. */
1191 values.sals[0] = find_function_start_sal (sym, funfirstline);
1192 build_canonical_line_spec (values.sals,
1193 SYMBOL_NATURAL_NAME (sym), canonical);
1197 /* The only match was a non-debuggable symbol, which might point
1198 to a function descriptor; resolve it to the actual code address
1200 struct minimal_symbol *msymbol = (struct minimal_symbol *)sym_arr[0];
1201 struct objfile *objfile = msymbol_objfile (msymbol);
1202 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1203 CORE_ADDR pc = SYMBOL_VALUE_ADDRESS (msymbol);
1205 pc = gdbarch_convert_from_func_ptr_addr (gdbarch, pc,
1208 init_sal (&values.sals[0]);
1209 values.sals[0].pc = pc;
1216 /* More than one match. The user must choose one or more. */
1217 return decode_line_2 (sym_arr, i2, funfirstline, canonical);
1223 /* This handles C++ and Java compound data structures. P should point
1224 at the first component separator, i.e. double-colon or period. As
1225 an example, on entrance to this function we could have ARGPTR
1226 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1228 static struct symtabs_and_lines
1229 decode_compound (char **argptr, int funfirstline, char ***canonical,
1230 char *saved_arg, char *p, int *not_found_ptr)
1232 struct symtabs_and_lines values;
1234 char *saved_arg2 = *argptr;
1238 struct symbol *sym_class;
1240 char *saved_java_argptr = NULL;
1242 /* First check for "global" namespace specification, of the form
1243 "::foo". If found, skip over the colons and jump to normal
1244 symbol processing. I.e. the whole line specification starts with
1245 "::" (note the condition that *argptr == p). */
1247 && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
1250 /* Given our example "AAA::inA::fun", we have two cases to consider:
1252 1) AAA::inA is the name of a class. In that case, presumably it
1253 has a method called "fun"; we then look up that method using
1256 2) AAA::inA isn't the name of a class. In that case, either the
1257 user made a typo or AAA::inA is the name of a namespace.
1258 Either way, we just look up AAA::inA::fun with lookup_symbol.
1260 Thus, our first task is to find everything before the last set of
1261 double-colons and figure out if it's the name of a class. So we
1262 first loop through all of the double-colons. */
1264 p2 = p; /* Save for restart. */
1266 /* This is very messy. Following the example above we have now the
1269 argptr -> "AAA::inA::fun
1270 saved_arg -> "AAA::inA::fun
1271 saved_arg2 -> "AAA::inA::fun
1272 p2 -> "::inA::fun". */
1274 /* In the loop below, with these strings, we'll make 2 passes, each
1275 is marked in comments. */
1279 /* Move pointer up to next possible class/namespace token. */
1281 p = p2 + 1; /* Restart with old value +1. */
1283 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1284 i.e. if there is a double-colon, p will now point to the
1286 /* PASS2: p2->"::fun", p->":fun" */
1288 /* Move pointer ahead to next double-colon. */
1289 while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\'')
1292 if (current_language->la_language == language_cplus)
1293 p += cp_validate_operator (p);
1297 temp_end = find_template_name_end (p);
1299 error (_("malformed template specification in command"));
1302 /* Note that, since, at the start of this loop, p would be
1303 pointing to the second colon in a double-colon, we only
1304 satisfy the condition below if there is another
1305 double-colon to the right (after). I.e. there is another
1306 component that can be a class or a namespace. I.e, if at
1307 the beginning of this loop (PASS1), we had
1308 p->":inA::fun", we'll trigger this when p has been
1309 advanced to point to "::fun". */
1310 /* PASS2: we will not trigger this. */
1311 else if ((p[0] == ':') && (p[1] == ':'))
1312 break; /* Found double-colon. */
1314 /* PASS2: We'll keep getting here, until p->"", at which point
1315 we exit this loop. */
1320 break; /* Out of the while (1). This would happen
1321 for instance if we have looked up
1322 unsuccessfully all the components of the
1323 string, and p->""(PASS2). */
1325 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1327 /* Save restart for next time around. */
1329 /* Restore argptr as it was on entry to this function. */
1330 *argptr = saved_arg2;
1331 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1334 /* All ready for next pass through the loop. */
1338 /* Start of lookup in the symbol tables. */
1340 /* Lookup in the symbol table the substring between argptr and
1341 p. Note, this call changes the value of argptr. */
1342 /* Before the call, argptr->"AAA::inA::fun",
1343 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1345 sym_class = lookup_prefix_sym (argptr, p2);
1347 /* If sym_class has been found, and if "AAA::inA" is a class, then
1348 we're in case 1 above. So we look up "fun" as a method of that
1351 (t = check_typedef (SYMBOL_TYPE (sym_class)),
1352 (TYPE_CODE (t) == TYPE_CODE_STRUCT
1353 || TYPE_CODE (t) == TYPE_CODE_UNION)))
1355 /* Arg token is not digits => try it as a function name.
1356 Find the next token (everything up to end or next
1359 && strchr (get_gdb_completer_quote_characters (),
1362 p = skip_quoted (*argptr);
1363 *argptr = *argptr + 1;
1367 /* At this point argptr->"fun". */
1371 while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':'
1374 /* At this point p->"". String ended. */
1375 /* Nope, C++ operators could have spaces in them
1376 ("foo::operator <" or "foo::operator delete []").
1377 I apologize, this is a bit hacky... */
1378 if (current_language->la_language == language_cplus
1379 && *p == ' ' && p - 8 - *argptr + 1 > 0)
1381 /* The above loop has already swallowed "operator". */
1382 p += cp_validate_operator (p - 8) - 8;
1385 /* Keep any template parameters. */
1387 p = find_template_name_end (p);
1389 /* Keep method overload information. */
1390 a = strchr (p, '(');
1392 p = find_method_overload_end (a);
1394 /* Make sure we keep important kewords like "const". */
1395 if (strncmp (p, " const", 6) == 0)
1398 /* Java may append typenames, so assume that if there is
1399 anything else left in *argptr, it must be a typename. */
1400 if (*p && current_language->la_language == language_java)
1407 copy = (char *) alloca (p2 - p + 1);
1408 memcpy (copy, p, p2 - p);
1409 copy[p2 - p] = '\0';
1410 type = lookup_typename (current_language, get_current_arch (),
1414 /* Save the location of this just in case this
1415 method/type combination isn't actually defined.
1416 It will be checked later. */
1417 saved_java_argptr = p;
1423 /* Allocate our own copy of the substring between argptr and
1425 copy = (char *) alloca (p - *argptr + 1);
1426 memcpy (copy, *argptr, p - *argptr);
1427 copy[p - *argptr] = '\0';
1429 && copy[p - *argptr - 1]
1430 && strchr (get_gdb_completer_quote_characters (),
1431 copy[p - *argptr - 1]) != NULL)
1432 copy[p - *argptr - 1] = '\0';
1434 /* At this point copy->"fun", p->"". */
1436 /* No line number may be specified. */
1437 while (*p == ' ' || *p == '\t')
1440 /* At this point arptr->"". */
1442 /* Look for copy as a method of sym_class. */
1443 /* At this point copy->"fun", sym_class is "AAA:inA",
1444 saved_arg->"AAA::inA::fun". This concludes the scanning of
1445 the string for possible components matches. If we find it
1446 here, we return. If not, and we are at the and of the string,
1447 we'll lookup the whole string in the symbol tables. */
1449 values = find_method (funfirstline, canonical, saved_arg,
1450 copy, t, sym_class, not_found_ptr);
1451 if (saved_java_argptr != NULL && values.nelts == 1)
1453 /* The user specified a specific return type for a java method.
1454 Double-check that it really is the one the user specified.
1455 [This is a necessary evil because strcmp_iw_ordered stops
1456 comparisons too prematurely.] */
1457 sym = find_pc_sect_function (values.sals[0].pc,
1458 values.sals[0].section);
1459 /* We just found a SAL, we had better be able to go backwards! */
1460 gdb_assert (sym != NULL);
1461 if (strcmp_iw (SYMBOL_LINKAGE_NAME (sym), saved_arg) != 0)
1463 xfree (values.sals);
1464 error (_("the class `%s' does not have "
1465 "any method instance named %s"),
1466 SYMBOL_PRINT_NAME (sym_class), copy);
1470 } /* End if symbol found. */
1473 /* We couldn't find a class, so we're in case 2 above. We check the
1474 entire name as a symbol instead. */
1476 copy = (char *) alloca (p - saved_arg2 + 1);
1477 memcpy (copy, saved_arg2, p - saved_arg2);
1478 /* Note: if is_quoted should be true, we snuff out quote here
1480 copy[p - saved_arg2] = '\000';
1481 /* Set argptr to skip over the name. */
1482 *argptr = (*p == '\'') ? p + 1 : p;
1484 /* Look up entire name. */
1485 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1487 return symbol_found (funfirstline, canonical, copy, sym, NULL);
1489 /* Couldn't find any interpretation as classes/namespaces, so give
1490 up. The quotes are important if copy is empty. */
1493 cplusplus_error (saved_arg,
1494 "Can't find member of namespace, "
1495 "class, struct, or union named \"%s\"\n",
1499 /* Next come some helper functions for decode_compound. */
1501 /* Return the symbol corresponding to the substring of *ARGPTR ending
1502 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1503 name in question, the compound object separator ("::" or "."), and
1504 whitespace. Note that *ARGPTR is changed whether or not the
1505 lookup_symbol call finds anything (i.e we return NULL). As an
1506 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1508 static struct symbol *
1509 lookup_prefix_sym (char **argptr, char *p)
1515 /* Extract the class name. */
1517 while (p != *argptr && p[-1] == ' ')
1519 copy = (char *) alloca (p - *argptr + 1);
1520 memcpy (copy, *argptr, p - *argptr);
1521 copy[p - *argptr] = 0;
1523 /* Discard the class name from the argptr. */
1524 p = p1 + (p1[0] == ':' ? 2 : 1);
1525 while (*p == ' ' || *p == '\t')
1529 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1530 argptr->"inA::fun". */
1532 sym = lookup_symbol (copy, 0, STRUCT_DOMAIN, 0);
1535 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1536 fail when the user attempts to lookup a method of a class
1537 via a typedef'd name (NOT via the class's name, which is already
1538 handled in symbol_matches_domain). So try the lookup again
1539 using VAR_DOMAIN (where typedefs live) and double-check that we
1540 found a struct/class type. */
1541 struct symbol *s = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1545 struct type *t = SYMBOL_TYPE (s);
1548 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
1556 /* This finds the method COPY in the class whose type is T and whose
1557 symbol is SYM_CLASS. */
1559 static struct symtabs_and_lines
1560 find_method (int funfirstline, char ***canonical, char *saved_arg,
1561 char *copy, struct type *t, struct symbol *sym_class,
1564 struct symtabs_and_lines values;
1565 struct symbol *sym = NULL;
1566 int i1; /* Counter for the symbol array. */
1567 struct symbol **sym_arr = alloca (total_number_of_methods (t)
1568 * sizeof (struct symbol *));
1570 /* Find all methods with a matching name, and put them in
1573 i1 = find_methods (t, copy, SYMBOL_LANGUAGE (sym_class), sym_arr);
1577 /* There is exactly one field with that name. */
1580 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1582 values.sals = (struct symtab_and_line *)
1583 xmalloc (sizeof (struct symtab_and_line));
1585 values.sals[0] = find_function_start_sal (sym,
1597 /* If we were given a specific overload instance, use that
1598 (or error if no matches were found). Otherwise ask the user
1599 which one to use. */
1600 if (strchr (saved_arg, '(') != NULL)
1603 char *name = saved_arg;
1604 char *canon = cp_canonicalize_string (name);
1605 struct cleanup *cleanup;
1610 cleanup = make_cleanup (xfree, canon);
1613 cleanup = make_cleanup (null_cleanup, NULL);
1615 for (i = 0; i < i1; ++i)
1617 if (strcmp_iw (name, SYMBOL_LINKAGE_NAME (sym_arr[i])) == 0)
1619 values.sals = (struct symtab_and_line *)
1620 xmalloc (sizeof (struct symtab_and_line));
1622 values.sals[0] = find_function_start_sal (sym_arr[i],
1624 do_cleanups (cleanup);
1629 error (_("the class `%s' does not have "
1630 "any method instance named %s"),
1631 SYMBOL_PRINT_NAME (sym_class), copy);
1634 return decode_line_2 (sym_arr, i1, funfirstline, canonical);
1641 cplusplus_error (saved_arg,
1642 "the class `%s' does not have destructor defined\n",
1643 SYMBOL_PRINT_NAME (sym_class));
1645 cplusplus_error (saved_arg,
1646 "the class %s does not have any method named %s\n",
1647 SYMBOL_PRINT_NAME (sym_class), copy);
1653 /* Return the symtab associated to the filename given by the substring
1654 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1655 NOT_FOUND_PTR is not null and the source file is not found, store
1656 boolean true at the location pointed to and do not issue an
1659 static struct symtab *
1660 symtab_from_filename (char **argptr, char *p, int is_quote_enclosed,
1665 struct symtab *file_symtab;
1668 while (p != *argptr && p[-1] == ' ')
1670 if ((*p == '"') && is_quote_enclosed)
1672 copy = (char *) alloca (p - *argptr + 1);
1673 memcpy (copy, *argptr, p - *argptr);
1674 /* It may have the ending quote right after the file name. */
1675 if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
1676 || copy[p - *argptr - 1] == '\'')
1677 copy[p - *argptr - 1] = 0;
1679 copy[p - *argptr] = 0;
1681 /* Find that file's data. */
1682 file_symtab = lookup_symtab (copy);
1683 if (file_symtab == 0)
1687 if (!have_full_symbols () && !have_partial_symbols ())
1688 throw_error (NOT_FOUND_ERROR,
1689 _("No symbol table is loaded. "
1690 "Use the \"file\" command."));
1691 throw_error (NOT_FOUND_ERROR, _("No source file named %s."), copy);
1694 /* Discard the file name from the arg. */
1696 while (*p == ' ' || *p == '\t')
1705 /* This decodes a line where the argument is all digits (possibly
1706 preceded by a sign). Q should point to the end of those digits;
1707 the other arguments are as usual. */
1709 static struct symtabs_and_lines
1710 decode_all_digits (char **argptr, struct symtab *default_symtab,
1711 int default_line, char ***canonical,
1712 struct symtab *file_symtab, char *q)
1715 struct symtabs_and_lines values;
1716 struct symtab_and_line val;
1724 /* We might need a canonical line spec if no file was specified. */
1725 int need_canonical = (file_symtab == NULL) ? 1 : 0;
1729 val.pspace = current_program_space;
1731 /* This is where we need to make sure that we have good defaults.
1732 We must guarantee that this section of code is never executed
1733 when we are called with just a function name, since
1734 set_default_source_symtab_and_line uses
1735 select_source_symtab that calls us with such an argument. */
1737 if (file_symtab == 0 && default_symtab == 0)
1739 /* Make sure we have at least a default source file. */
1740 set_default_source_symtab_and_line ();
1741 initialize_defaults (&default_symtab, &default_line);
1744 if (**argptr == '+')
1745 sign = plus, (*argptr)++;
1746 else if (**argptr == '-')
1747 sign = minus, (*argptr)++;
1748 val.line = atoi (*argptr);
1754 if (file_symtab == 0)
1755 val.line = default_line + val.line;
1760 if (file_symtab == 0)
1761 val.line = default_line - val.line;
1766 break; /* No need to adjust val.line. */
1769 while (*q == ' ' || *q == '\t')
1772 if (file_symtab == 0)
1773 file_symtab = default_symtab;
1775 /* It is possible that this source file has more than one symtab,
1776 and that the new line number specification has moved us from the
1777 default (in file_symtab) to a new one. */
1778 val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL);
1779 if (val.symtab == 0)
1780 val.symtab = file_symtab;
1782 val.pspace = SYMTAB_PSPACE (val.symtab);
1784 values.sals = (struct symtab_and_line *)
1785 xmalloc (sizeof (struct symtab_and_line));
1786 values.sals[0] = val;
1789 build_canonical_line_spec (values.sals, NULL, canonical);
1790 values.sals[0].explicit_line = 1;
1796 /* Decode a linespec starting with a dollar sign. */
1798 static struct symtabs_and_lines
1799 decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
1800 char ***canonical, struct symtab *file_symtab)
1804 int need_canonical = 0;
1805 struct symtabs_and_lines values;
1806 struct symtab_and_line val;
1809 struct minimal_symbol *msymbol;
1811 p = (copy[1] == '$') ? copy + 2 : copy + 1;
1812 while (*p >= '0' && *p <= '9')
1814 if (!*p) /* Reached end of token without hitting non-digit. */
1816 /* We have a value history reference. */
1817 struct value *val_history;
1819 sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
1820 val_history = access_value_history ((copy[1] == '$') ? -index : index);
1821 if (TYPE_CODE (value_type (val_history)) != TYPE_CODE_INT)
1822 error (_("History values used in line "
1823 "specs must have integer values."));
1824 valx = value_as_long (val_history);
1828 /* Not all digits -- may be user variable/function or a
1829 convenience variable. */
1831 /* Look up entire name as a symbol first. */
1832 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1833 file_symtab = (struct symtab *) NULL;
1835 /* Symbol was found --> jump to normal symbol processing. */
1837 return symbol_found (funfirstline, canonical, copy, sym, NULL);
1839 /* If symbol was not found, look in minimal symbol tables. */
1840 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1841 /* Min symbol was found --> jump to minsym processing. */
1843 return minsym_found (funfirstline, msymbol);
1845 /* Not a user variable or function -- must be convenience variable. */
1846 if (!get_internalvar_integer (lookup_internalvar (copy + 1), &valx))
1847 error (_("Convenience variables used in line "
1848 "specs must have integer values."));
1853 /* Either history value or convenience value from above, in valx. */
1854 val.symtab = file_symtab ? file_symtab : default_symtab;
1857 val.pspace = current_program_space;
1859 values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
1860 values.sals[0] = val;
1864 build_canonical_line_spec (values.sals, NULL, canonical);
1871 /* A helper for decode_line_1 that tries to find a label. The label
1872 is searched for in the current block.
1873 COPY is the name of the label to find.
1874 CANONICAL is the same as the "canonical" argument to decode_line_1.
1875 RESULT is a pointer to a symtabs_and_lines structure which will be
1876 filled in on success.
1877 This function returns 1 if a label was found, 0 otherwise. */
1880 decode_label (char *copy, char ***canonical, struct symtabs_and_lines *result)
1884 sym = lookup_symbol (copy, get_selected_block (0), LABEL_DOMAIN, 0);
1887 *result = symbol_found (0, canonical, copy, sym, NULL);
1892 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1893 look in that symtab's static variables first. If NOT_FOUND_PTR is
1894 not NULL and the function cannot be found, store boolean true in
1895 the location pointed to and do not issue an error message. */
1897 static struct symtabs_and_lines
1898 decode_variable (char *copy, int funfirstline, char ***canonical,
1899 struct symtab *file_symtab, int *not_found_ptr)
1902 struct minimal_symbol *msymbol;
1904 sym = lookup_symbol (copy,
1906 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab),
1908 : get_selected_block (0)),
1912 return symbol_found (funfirstline, canonical, copy, sym, file_symtab);
1914 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1916 if (msymbol != NULL)
1917 return minsym_found (funfirstline, msymbol);
1922 if (!have_full_symbols ()
1923 && !have_partial_symbols ()
1924 && !have_minimal_symbols ())
1925 throw_error (NOT_FOUND_ERROR,
1926 _("No symbol table is loaded. Use the \"file\" command."));
1927 throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy);
1933 /* Now come some functions that are called from multiple places within
1936 /* We've found a symbol SYM to associate with our linespec; build a
1937 corresponding struct symtabs_and_lines. */
1939 static struct symtabs_and_lines
1940 symbol_found (int funfirstline, char ***canonical, char *copy,
1941 struct symbol *sym, struct symtab *file_symtab)
1943 struct symtabs_and_lines values;
1945 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
1947 /* Arg is the name of a function. */
1948 values.sals = (struct symtab_and_line *)
1949 xmalloc (sizeof (struct symtab_and_line));
1950 values.sals[0] = find_function_start_sal (sym, funfirstline);
1953 /* Don't use the SYMBOL_LINE; if used at all it points to
1954 the line containing the parameters or thereabouts, not
1955 the first line of code. */
1957 /* We might need a canonical line spec if it is a static
1959 if (file_symtab == 0)
1961 struct blockvector *bv = BLOCKVECTOR (SYMBOL_SYMTAB (sym));
1962 struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1964 if (lookup_block_symbol (b, copy, VAR_DOMAIN) != NULL)
1965 build_canonical_line_spec (values.sals, copy, canonical);
1971 if (funfirstline && SYMBOL_CLASS (sym) != LOC_LABEL)
1972 error (_("\"%s\" is not a function"), copy);
1973 else if (SYMBOL_LINE (sym) != 0)
1975 /* We know its line number. */
1976 values.sals = (struct symtab_and_line *)
1977 xmalloc (sizeof (struct symtab_and_line));
1979 memset (&values.sals[0], 0, sizeof (values.sals[0]));
1980 values.sals[0].symtab = SYMBOL_SYMTAB (sym);
1981 values.sals[0].line = SYMBOL_LINE (sym);
1982 values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
1986 /* This can happen if it is compiled with a compiler which doesn't
1987 put out line numbers for variables. */
1988 /* FIXME: Shouldn't we just set .line and .symtab to zero
1989 and return? For example, "info line foo" could print
1991 error (_("Line number not known for symbol \"%s\""), copy);
1995 /* We've found a minimal symbol MSYMBOL to associate with our
1996 linespec; build a corresponding struct symtabs_and_lines. */
1998 static struct symtabs_and_lines
1999 minsym_found (int funfirstline, struct minimal_symbol *msymbol)
2001 struct objfile *objfile = msymbol_objfile (msymbol);
2002 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2003 struct symtabs_and_lines values;
2006 values.sals = (struct symtab_and_line *)
2007 xmalloc (sizeof (struct symtab_and_line));
2008 values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
2009 (struct obj_section *) 0, 0);
2010 values.sals[0].section = SYMBOL_OBJ_SECTION (msymbol);
2012 /* The minimal symbol might point to a function descriptor;
2013 resolve it to the actual code address instead. */
2014 pc = gdbarch_convert_from_func_ptr_addr (gdbarch,
2017 if (pc != values.sals[0].pc)
2018 values.sals[0] = find_pc_sect_line (pc, NULL, 0);
2021 skip_prologue_sal (&values.sals[0]);