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 #include "cli/cli-utils.h"
47 /* We share this one with symtab.c, but it is not exported widely. */
49 extern char *operator_chars (char *, char **);
51 /* Prototypes for local functions. */
53 static void initialize_defaults (struct symtab **default_symtab,
56 static struct symtabs_and_lines decode_indirect (char **argptr);
58 static char *locate_first_half (char **argptr, int *is_quote_enclosed);
60 static struct symtabs_and_lines decode_objc (char **argptr,
62 struct symtab *file_symtab,
63 struct linespec_result *canonical,
66 static struct symtabs_and_lines decode_compound (char **argptr,
68 struct linespec_result *canonical,
72 static struct symbol *lookup_prefix_sym (char **argptr, char *p);
74 static struct symtabs_and_lines find_method (int funfirstline,
75 struct linespec_result *canonical,
79 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 *,
98 char *, struct linespec_result *);
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 *[],
106 struct linespec_result *);
108 static struct symtab *symtab_from_filename (char **argptr,
109 char *p, int is_quote_enclosed);
111 static struct symbol *find_function_symbol (char **argptr, char *p,
112 int is_quote_enclosed);
115 symtabs_and_lines decode_all_digits (char **argptr,
116 struct symtab *default_symtab,
118 struct linespec_result *canonical,
119 struct symtab *file_symtab,
122 static struct symtabs_and_lines decode_dollar (char *copy,
124 struct symtab *default_symtab,
125 struct linespec_result *canonical,
126 struct symtab *file_symtab);
128 static int decode_label (struct symbol *function_symbol,
129 char *copy, struct linespec_result *canonical,
130 struct symtabs_and_lines *result);
132 static struct symtabs_and_lines decode_variable (char *copy,
134 struct linespec_result *canonical,
135 struct symtab *file_symtab);
138 symtabs_and_lines symbol_found (int funfirstline,
139 struct linespec_result *canonical,
142 struct symtab *file_symtab,
143 struct symbol *function_symbol);
146 symtabs_and_lines minsym_found (int funfirstline,
147 struct minimal_symbol *msymbol);
149 /* Helper functions. */
151 /* Issue a helpful hint on using the command completion feature on
152 single quoted demangled C++ symbols as part of the completion
156 cplusplus_error (const char *name, const char *fmt, ...)
158 struct ui_file *tmp_stream;
161 tmp_stream = mem_fileopen ();
162 make_cleanup_ui_file_delete (tmp_stream);
167 va_start (args, fmt);
168 vfprintf_unfiltered (tmp_stream, fmt, args);
172 while (*name == '\'')
174 fprintf_unfiltered (tmp_stream,
175 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
176 "(Note leading single quote.)"),
179 message = ui_file_xstrdup (tmp_stream, NULL);
180 make_cleanup (xfree, message);
181 throw_error (NOT_FOUND_ERROR, "%s", message);
184 /* Return the number of methods described for TYPE, including the
185 methods from types it derives from. This can't be done in the symbol
186 reader because the type of the baseclass might still be stubbed
187 when the definition of the derived class is parsed. */
190 total_number_of_methods (struct type *type)
195 CHECK_TYPEDEF (type);
196 if (! HAVE_CPLUS_STRUCT (type))
198 count = TYPE_NFN_FIELDS_TOTAL (type);
200 for (n = 0; n < TYPE_N_BASECLASSES (type); n++)
201 count += total_number_of_methods (TYPE_BASECLASS (type, n));
206 /* Recursive helper function for decode_line_1.
207 Look for methods named NAME in type T.
208 Return number of matches.
209 Put matches in SYM_ARR, which should have been allocated with
210 a size of total_number_of_methods (T) * sizeof (struct symbol *).
211 Note that this function is g++ specific. */
214 find_methods (struct type *t, char *name, enum language language,
215 struct symbol **sym_arr)
219 char *class_name = type_name_no_tag (t);
220 struct cleanup *cleanup;
223 /* NAME is typed by the user: it needs to be canonicalized before
224 passing to lookup_symbol. */
225 canon = cp_canonicalize_string (name);
229 cleanup = make_cleanup (xfree, name);
232 cleanup = make_cleanup (null_cleanup, NULL);
234 /* Ignore this class if it doesn't have a name. This is ugly, but
235 unless we figure out how to get the physname without the name of
236 the class, then the loop can't do any good. */
238 && (lookup_symbol_in_language (class_name, (struct block *) NULL,
239 STRUCT_DOMAIN, language, (int *) NULL)))
242 int name_len = strlen (name);
246 /* Loop over each method name. At this level, all overloads of a name
247 are counted as a single name. There is an inner loop which loops over
250 for (method_counter = TYPE_NFN_FIELDS (t) - 1;
254 char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
257 if (strncmp (method_name, "__", 2) == 0 ||
258 strncmp (method_name, "op", 2) == 0 ||
259 strncmp (method_name, "type", 4) == 0)
261 if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI))
262 method_name = dem_opname;
263 else if (cplus_demangle_opname (method_name, dem_opname, 0))
264 method_name = dem_opname;
267 if (strcmp_iw (name, method_name) == 0)
268 /* Find all the overloaded methods with that name. */
269 i1 += add_matching_methods (method_counter, t, language,
271 else if (strncmp (class_name, name, name_len) == 0
272 && (class_name[name_len] == '\0'
273 || class_name[name_len] == '<'))
274 i1 += add_constructors (method_counter, t, language,
279 /* Only search baseclasses if there is no match yet, since names in
280 derived classes override those in baseclasses.
282 FIXME: The above is not true; it is only true of member functions
283 if they have the same number of arguments (??? - section 13.1 of the
284 ARM says the function members are not in the same scope but doesn't
285 really spell out the rules in a way I understand. In any case, if
286 the number of arguments differ this is a case in which we can overload
287 rather than hiding without any problem, and gcc 2.4.5 does overload
288 rather than hiding in this case). */
291 for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
292 i1 += find_methods (TYPE_BASECLASS (t, ibase), name,
293 language, sym_arr + i1);
295 do_cleanups (cleanup);
299 /* Add the symbols associated to methods of the class whose type is T
300 and whose name matches the method indexed by METHOD_COUNTER in the
301 array SYM_ARR. Return the number of methods added. */
304 add_matching_methods (int method_counter, struct type *t,
305 enum language language, struct symbol **sym_arr)
310 for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
315 const char *phys_name;
317 f = TYPE_FN_FIELDLIST1 (t, method_counter);
319 if (TYPE_FN_FIELD_STUB (f, field_counter))
321 char *tmp_name, *tmp2;
323 tmp_name = gdb_mangle_name (t,
326 tmp2 = alloca (strlen (tmp_name) + 1);
327 strcpy (tmp2, tmp_name);
332 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
334 sym_arr[i1] = lookup_symbol_in_language (phys_name,
342 /* This error message gets printed, but the method
343 still seems to be found.
344 fputs_filtered("(Cannot find method ", gdb_stdout);
345 fprintf_symbol_filtered (gdb_stdout, phys_name,
347 DMGL_PARAMS | DMGL_ANSI);
348 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
356 /* Add the symbols associated to constructors of the class whose type
357 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
358 array SYM_ARR. Return the number of methods added. */
361 add_constructors (int method_counter, struct type *t,
362 enum language language, struct symbol **sym_arr)
367 /* For GCC 3.x and stabs, constructors and destructors
368 have names like __base_ctor and __complete_dtor.
369 Check the physname for now if we're looking for a
372 = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
377 const char *phys_name;
379 f = TYPE_FN_FIELDLIST1 (t, method_counter);
381 /* GCC 3.x will never produce stabs stub methods, so
382 we don't need to handle this case. */
383 if (TYPE_FN_FIELD_STUB (f, field_counter))
385 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
386 if (! is_constructor_name (phys_name))
389 /* If this method is actually defined, include it in the
391 sym_arr[i1] = lookup_symbol_in_language (phys_name,
402 /* Helper function for decode_line_1.
403 Build a canonical line spec in CANONICAL if it is non-NULL and if
404 the SAL has a symtab.
405 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
406 If SYMNAME is NULL the line number from SAL is used and the canonical
407 line spec is `filename:linenum'. */
410 build_canonical_line_spec (struct symtab_and_line *sal, char *symname,
411 struct linespec_result *canonical)
413 char **canonical_arr;
414 char *canonical_name;
416 struct symtab *s = sal->symtab;
418 if (s == (struct symtab *) NULL
419 || s->filename == (char *) NULL
420 || canonical == NULL)
423 canonical_arr = (char **) xmalloc (sizeof (char *));
424 canonical->canonical = canonical_arr;
426 filename = s->filename;
429 canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2);
430 sprintf (canonical_name, "%s:%s", filename, symname);
434 canonical_name = xmalloc (strlen (filename) + 30);
435 sprintf (canonical_name, "%s:%d", filename, sal->line);
437 canonical_arr[0] = canonical_name;
442 /* Find an instance of the character C in the string S that is outside
443 of all parenthesis pairs, single-quoted strings, and double-quoted
444 strings. Also, ignore the char within a template name, like a ','
445 within foo<int, int>. */
448 find_toplevel_char (char *s, char c)
450 int quoted = 0; /* zero if we're not in quotes;
451 '"' if we're in a double-quoted string;
452 '\'' if we're in a single-quoted string. */
453 int depth = 0; /* Number of unclosed parens we've seen. */
456 for (scan = s; *scan; scan++)
462 else if (*scan == '\\' && *(scan + 1))
465 else if (*scan == c && ! quoted && depth == 0)
467 else if (*scan == '"' || *scan == '\'')
469 else if (*scan == '(' || *scan == '<')
471 else if ((*scan == ')' || *scan == '>') && depth > 0)
478 /* Determines if the gives string corresponds to an Objective-C method
479 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
480 are allowed to have spaces and parentheses in them. */
483 is_objc_method_format (const char *s)
485 if (s == NULL || *s == '\0')
487 /* Handle arguments with the format FILENAME:SYMBOL. */
488 if ((s[0] == ':') && (strchr ("+-", s[1]) != NULL)
489 && (s[2] == '[') && strchr(s, ']'))
491 /* Handle arguments that are just SYMBOL. */
492 else if ((strchr ("+-", s[0]) != NULL) && (s[1] == '[') && strchr(s, ']'))
497 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
498 operate on (ask user if necessary).
499 If CANONICAL is non-NULL return a corresponding array of mangled names
500 as canonical line specs there. */
502 static struct symtabs_and_lines
503 decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline,
504 struct linespec_result *canonical)
506 struct symtabs_and_lines values, return_values;
511 struct cleanup *old_chain;
512 char **canonical_arr = (char **) NULL;
513 const char *select_mode = multiple_symbols_select_mode ();
515 if (select_mode == multiple_symbols_cancel)
516 error (_("canceled because the command is ambiguous\n"
517 "See set/show multiple-symbol."));
519 values.sals = (struct symtab_and_line *)
520 alloca (nelts * sizeof (struct symtab_and_line));
521 return_values.sals = (struct symtab_and_line *)
522 xmalloc (nelts * sizeof (struct symtab_and_line));
523 old_chain = make_cleanup (xfree, return_values.sals);
527 canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
528 make_cleanup (xfree, canonical_arr);
529 memset (canonical_arr, 0, nelts * sizeof (char *));
530 canonical->canonical = canonical_arr;
536 init_sal (&return_values.sals[i]); /* Initialize to zeroes. */
537 init_sal (&values.sals[i]);
538 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
539 values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
543 /* If select_mode is "all", then do not print the multiple-choice
544 menu and act as if the user had chosen choice "1" (all). */
545 if (select_mode == multiple_symbols_all
546 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
551 printf_unfiltered (_("[0] cancel\n[1] all\n"));
554 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
556 if (values.sals[i].symtab)
557 printf_unfiltered ("[%d] %s at %s:%d\n",
559 SYMBOL_PRINT_NAME (sym_arr[i]),
560 values.sals[i].symtab->filename,
561 values.sals[i].line);
563 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? "
564 "Probably broken debug info...]\n"),
566 SYMBOL_PRINT_NAME (sym_arr[i]),
567 values.sals[i].line);
571 printf_unfiltered (_("?HERE\n"));
575 prompt = getenv ("PS2");
580 args = command_line_input (prompt, 0, "overload-choice");
583 if (args == 0 || *args == 0)
584 error_no_arg (_("one or more choice numbers"));
592 while (*arg1 >= '0' && *arg1 <= '9')
594 if (*arg1 && *arg1 != ' ' && *arg1 != '\t')
595 error (_("Arguments must be choice numbers."));
600 error (_("canceled"));
605 for (i = 0; i < nelts; i++)
607 if (canonical_arr[i] == NULL)
609 symname = SYMBOL_LINKAGE_NAME (sym_arr[i]);
610 canonical_arr[i] = xstrdup (symname);
614 memcpy (return_values.sals, values.sals,
615 (nelts * sizeof (struct symtab_and_line)));
616 return_values.nelts = nelts;
617 discard_cleanups (old_chain);
618 return return_values;
621 if (num >= nelts + 2)
623 printf_unfiltered (_("No choice number %d.\n"), num);
628 if (values.sals[num].pc)
632 symname = SYMBOL_LINKAGE_NAME (sym_arr[num]);
633 make_cleanup (xfree, symname);
634 canonical_arr[i] = xstrdup (symname);
636 return_values.sals[i++] = values.sals[num];
637 values.sals[num].pc = 0;
641 printf_unfiltered (_("duplicate request for %d ignored.\n"),
647 while (*args == ' ' || *args == '\t')
650 return_values.nelts = i;
651 discard_cleanups (old_chain);
652 return return_values;
655 /* A helper function for decode_line_1 and friends which skips P
656 past any method overload information at the beginning of P, e.g.,
657 "(const struct foo *)".
659 This function assumes that P has already been validated to contain
660 overload information, and it will assert if *P != '('. */
662 find_method_overload_end (char *p)
666 gdb_assert (*p == '(');
686 /* Does P point to a sequence of characters which implies the end
687 of a name? Terminals include "if" and "thread" clauses. */
694 if (*p == 'i' && p[1] == 'f'
695 && (isspace (p[2]) || p[2] == '\0' || p[2] == '('))
698 if (strncmp (p, "thread", 6) == 0
699 && (isspace (p[6]) || p[6] == '\0'))
705 /* Keep important information used when looking up a name. This includes
706 template parameters, overload information, and important keywords. */
709 keep_name_info (char *ptr)
714 /* Keep any template parameters. */
716 return remove_trailing_whitespace (start, ptr);
720 ptr = p = find_template_name_end (ptr);
723 return remove_trailing_whitespace (start, ptr);
725 /* Keep method overload information. */
727 ptr = p = find_method_overload_end (p);
730 return remove_trailing_whitespace (start, ptr);
732 /* Keep important keywords. */
735 char *quotes = get_gdb_completer_quote_characters ();
737 if (strncmp (p, "const", 5) == 0
738 && (isspace (p[5]) || p[5] == '\0'
739 || strchr (quotes, p[5]) != NULL))
741 else if (strncmp (p, "volatile", 8) == 0
742 && (isspace (p[8]) || p[8] == '\0'
743 || strchr (quotes, p[8]) != NULL))
749 return remove_trailing_whitespace (start, ptr);
753 /* The parser of linespec itself. */
755 /* Parse a string that specifies a line number.
756 Pass the address of a char * variable; that variable will be
757 advanced over the characters actually parsed.
761 LINENUM -- that line number in current file. PC returned is 0.
762 FILE:LINENUM -- that line in that file. PC returned is 0.
763 FUNCTION -- line number of openbrace of that function.
764 PC returned is the start of the function.
765 LABEL -- a label in the current scope
766 VARIABLE -- line number of definition of that variable.
768 FILE:FUNCTION -- likewise, but prefer functions in that file.
769 *EXPR -- line in which address EXPR appears.
771 This may all be followed by an "if EXPR", which we ignore.
773 FUNCTION may be an undebuggable function found in minimal symbol table.
775 If the argument FUNFIRSTLINE is nonzero, we want the first line
776 of real code inside a function when a function is specified, and it is
777 not OK to specify a variable or type to get its line number.
779 DEFAULT_SYMTAB specifies the file to use if none is specified.
780 It defaults to current_source_symtab.
781 DEFAULT_LINE specifies the line number to use for relative
782 line numbers (that start with signs). Defaults to current_source_line.
783 If CANONICAL is non-NULL, store an array of strings containing the canonical
784 line specs there if necessary. Currently overloaded member functions and
785 line numbers or static functions without a filename yield a canonical
786 line spec. The array and the line spec strings are allocated on the heap,
787 it is the callers responsibility to free them.
789 Note that it is possible to return zero for the symtab
790 if no file is validly specified. Callers must check that.
791 Also, the line number returned may be invalid. */
793 /* We allow single quotes in various places. This is a hideous
794 kludge, which exists because the completer can't yet deal with the
795 lack of single quotes. FIXME: write a linespec_completer which we
796 can use as appropriate instead of make_symbol_completion_list. */
798 struct symtabs_and_lines
799 decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
800 int default_line, struct linespec_result *canonical)
804 /* If a file name is specified, this is its symtab. */
805 struct symtab *file_symtab = NULL;
808 /* This says whether or not something in *ARGPTR is quoted with
809 completer_quotes (i.e. with single quotes). */
811 /* Is *ARGPTR is enclosed in double quotes? */
812 int is_quote_enclosed;
813 int is_objc_method = 0;
814 char *saved_arg = *argptr;
815 /* If IS_QUOTED, the end of the quoted bit. */
816 char *end_quote = NULL;
817 /* The "first half" of the linespec. */
820 /* If we are parsing `function:label', this holds the symbol for the
822 struct symbol *function_symbol = NULL;
823 /* If FUNCTION_SYMBOL is not NULL, then this is the exception that
824 was thrown when trying to parse a filename. */
825 volatile struct gdb_exception file_exception;
827 /* Defaults have defaults. */
829 initialize_defaults (&default_symtab, &default_line);
831 /* See if arg is *PC. */
834 return decode_indirect (argptr);
836 is_quoted = (strchr (get_gdb_completer_quote_characters (),
840 end_quote = skip_quoted (*argptr);
842 /* Check to see if it's a multipart linespec (with colons or
845 /* Locate the end of the first half of the linespec.
846 After the call, for instance, if the argptr string is "foo.c:123"
847 p will point at "123". If there is only one part, like "foo", p
848 will point to "". If this is a C++ name, like "A::B::foo", p will
849 point to "::B::foo". Argptr is not changed by this call. */
851 first_half = p = locate_first_half (argptr, &is_quote_enclosed);
853 /* Check if this is an Objective-C method (anything that starts with
854 a '+' or '-' and a '['). */
855 if (is_objc_method_format (p))
858 /* Check if the symbol could be an Objective-C selector. */
861 struct symtabs_and_lines values;
863 values = decode_objc (argptr, funfirstline, NULL,
864 canonical, saved_arg);
865 if (values.sals != NULL)
869 /* Does it look like there actually were two parts? */
871 if (p[0] == ':' || p[0] == '.')
873 /* Is it a C++ or Java compound data structure?
874 The check on p[1] == ':' is capturing the case of "::",
875 since p[0]==':' was checked above.
876 Note that the call to decode_compound does everything
877 for us, including the lookup on the symbol table, so we
880 if (p[0] == '.' || p[1] == ':')
882 struct symtabs_and_lines values;
884 if (is_quote_enclosed)
886 values = decode_compound (argptr, funfirstline, canonical,
888 if (is_quoted && **argptr == '\'')
889 *argptr = *argptr + 1;
893 /* No, the first part is a filename; set file_symtab to be that file's
894 symtab. Also, move argptr past the filename. */
896 TRY_CATCH (file_exception, RETURN_MASK_ERROR)
898 file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed);
900 /* If that failed, maybe we have `function:label'. */
901 if (file_exception.reason < 0)
903 function_symbol = find_function_symbol (argptr, p, is_quote_enclosed);
904 /* If we did not find a function, re-throw the original
906 if (!function_symbol)
907 throw_exception (file_exception);
910 /* Check for single quotes on the non-filename part. */
913 is_quoted = (**argptr
914 && strchr (get_gdb_completer_quote_characters (),
917 end_quote = skip_quoted (*argptr);
921 /* file_symtab is specified file's symtab, or 0 if no file specified.
922 If we are parsing `function:symbol', then FUNCTION_SYMBOL is the
923 function before the `:'.
924 arg no longer contains the file name. */
926 /* If the filename was quoted, we must re-check the quotation. */
928 if (end_quote == first_half && *end_quote!= '\0')
930 is_quoted = (**argptr
931 && strchr (get_gdb_completer_quote_characters (),
934 end_quote = skip_quoted (*argptr);
937 /* Check whether arg is all digits (and sign). */
940 if (*q == '-' || *q == '+')
942 while (*q >= '0' && *q <= '9')
945 if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')
946 && function_symbol == NULL)
947 /* We found a token consisting of all digits -- at least one digit. */
948 return decode_all_digits (argptr, default_symtab, default_line,
949 canonical, file_symtab, q);
951 /* Arg token is not digits => try it as a variable name
952 Find the next token (everything up to end or next whitespace). */
954 if (**argptr == '$') /* May be a convenience variable. */
955 /* One or two $ chars possible. */
956 p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1));
961 error (_("Unmatched single quote."));
963 else if (is_objc_method)
965 /* allow word separators in method names for Obj-C. */
966 p = skip_quoted_chars (*argptr, NULL, "");
970 p = skip_quoted (*argptr);
973 /* Keep any important naming information. */
974 p = keep_name_info (p);
976 copy = (char *) alloca (p - *argptr + 1);
977 memcpy (copy, *argptr, p - *argptr);
978 copy[p - *argptr] = '\0';
981 && copy[0] == copy[p - *argptr - 1]
982 && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
984 copy[p - *argptr - 1] = '\0';
988 copy[p - *argptr - 1] = '\0';
989 while (*p == ' ' || *p == '\t')
993 /* If it starts with $: may be a legitimate variable or routine name
994 (e.g. HP-UX millicode routines such as $$dyncall), or it may
995 be history value, or it may be a convenience variable. */
997 if (*copy == '$' && function_symbol == NULL)
998 return decode_dollar (copy, funfirstline, default_symtab,
999 canonical, file_symtab);
1001 /* Try the token as a label, but only if no file was specified,
1002 because we can only really find labels in the current scope. */
1006 struct symtabs_and_lines label_result;
1007 if (decode_label (function_symbol, copy, canonical, &label_result))
1008 return label_result;
1011 if (function_symbol)
1012 throw_exception (file_exception);
1014 /* Look up that token as a variable.
1015 If file specified, use that file's per-file block to start with. */
1017 return decode_variable (copy, funfirstline, canonical, file_symtab);
1022 /* Now, more helper functions for decode_line_1. Some conventions
1023 that these functions follow:
1025 Decode_line_1 typically passes along some of its arguments or local
1026 variables to the subfunctions. It passes the variables by
1027 reference if they are modified by the subfunction, and by value
1030 Some of the functions have side effects that don't arise from
1031 variables that are passed by reference. In particular, if a
1032 function is passed ARGPTR as an argument, it modifies what ARGPTR
1033 points to; typically, it advances *ARGPTR past whatever substring
1034 it has just looked at. (If it doesn't modify *ARGPTR, then the
1035 function gets passed *ARGPTR instead, which is then called ARG.)
1036 Also, functions that return a struct symtabs_and_lines may modify
1037 CANONICAL, as in the description of decode_line_1.
1039 If a function returns a struct symtabs_and_lines, then that struct
1040 will immediately make its way up the call chain to be returned by
1041 decode_line_1. In particular, all of the functions decode_XXX
1042 calculate the appropriate struct symtabs_and_lines, under the
1043 assumption that their argument is of the form XXX. */
1045 /* First, some functions to initialize stuff at the beggining of the
1049 initialize_defaults (struct symtab **default_symtab, int *default_line)
1051 if (*default_symtab == 0)
1053 /* Use whatever we have for the default source line. We don't use
1054 get_current_or_default_symtab_and_line as it can recurse and call
1056 struct symtab_and_line cursal =
1057 get_current_source_symtab_and_line ();
1059 *default_symtab = cursal.symtab;
1060 *default_line = cursal.line;
1066 /* Decode arg of the form *PC. */
1068 static struct symtabs_and_lines
1069 decode_indirect (char **argptr)
1071 struct symtabs_and_lines values;
1075 pc = value_as_address (parse_to_comma_and_eval (argptr));
1077 values.sals = (struct symtab_and_line *)
1078 xmalloc (sizeof (struct symtab_and_line));
1081 values.sals[0] = find_pc_line (pc, 0);
1082 values.sals[0].pc = pc;
1083 values.sals[0].section = find_pc_overlay (pc);
1084 values.sals[0].explicit_pc = 1;
1091 /* Locate the first half of the linespec, ending in a colon, period,
1092 or whitespace. (More or less.) Also, check to see if *ARGPTR is
1093 enclosed in double quotes; if so, set is_quote_enclosed, advance
1094 ARGPTR past that and zero out the trailing double quote.
1095 If ARGPTR is just a simple name like "main", p will point to ""
1099 locate_first_half (char **argptr, int *is_quote_enclosed)
1105 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1106 and we must isolate the first half. Outer layers will call again later
1107 for the second half.
1109 Don't count commas that appear in argument lists of overloaded
1110 functions, or in quoted strings. It's stupid to go to this much
1111 trouble when the rest of the function is such an obvious roach hotel. */
1112 ii = find_toplevel_char (*argptr, ',');
1113 has_comma = (ii != 0);
1115 /* Temporarily zap out second half to not confuse the code below.
1116 This is undone below. Do not change ii!! */
1122 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1123 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1129 *is_quote_enclosed = 1;
1135 *is_quote_enclosed = 0;
1136 if (strchr (get_gdb_completer_quote_characters (), *p))
1146 char *temp_end = find_template_name_end (p);
1149 error (_("malformed template specification in command"));
1154 p = find_method_overload_end (p);
1156 /* Check for a colon and a plus or minus and a [ (which
1157 indicates an Objective-C method). */
1158 if (is_objc_method_format (p))
1162 /* Check for the end of the first half of the linespec. End of
1163 line, a tab, a double colon or the last single colon, or a
1164 space. But if enclosed in double quotes we do not break on
1169 && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
1170 || ((p[0] == ' ') && !*is_quote_enclosed))
1172 if (p[0] == '.' && strchr (p, ':') == NULL)
1174 /* Java qualified method. Find the *last* '.', since the
1175 others are package qualifiers. Stop at any open parenthesis
1176 which might provide overload information. */
1177 for (p1 = p; *p1 && *p1 != '('; p1++)
1185 while (p[0] == ' ' || p[0] == '\t')
1188 /* If the closing double quote was left at the end, remove it. */
1189 if (*is_quote_enclosed)
1191 char *closing_quote = strchr (p - 1, '"');
1193 if (closing_quote && closing_quote[1] == '\0')
1194 *closing_quote = '\0';
1197 /* Now that we've safely parsed the first half, put back ',' so
1198 outer layers can see it. */
1207 /* Here's where we recognise an Objective-C Selector. An Objective C
1208 selector may be implemented by more than one class, therefore it
1209 may represent more than one method/function. This gives us a
1210 situation somewhat analogous to C++ overloading. If there's more
1211 than one method that could represent the selector, then use some of
1212 the existing C++ code to let the user choose one. */
1214 struct symtabs_and_lines
1215 decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab,
1216 struct linespec_result *canonical, char *saved_arg)
1218 struct symtabs_and_lines values;
1219 struct symbol **sym_arr = NULL;
1220 struct symbol *sym = NULL;
1221 struct block *block = NULL;
1228 if (file_symtab != NULL)
1229 block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), STATIC_BLOCK);
1232 enum language save_language;
1234 /* get_selected_block can change the current language when there is
1235 no selected frame yet. */
1236 save_language = current_language->la_language;
1237 block = get_selected_block (0);
1238 set_language (save_language);
1241 find_imps (file_symtab, block, *argptr, NULL, &i1, &i2);
1245 sym_arr = (struct symbol **)
1246 alloca ((i1 + 1) * sizeof (struct symbol *));
1249 *argptr = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2);
1252 /* i1 now represents the TOTAL number of matches found.
1253 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1254 which will come first in the sym_arr array. Any low-level
1255 (minimal_symbol) matches will follow those. */
1261 /* Already a struct symbol. */
1266 sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0]));
1267 if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]),
1268 SYMBOL_LINKAGE_NAME (sym)) != 0)
1270 warning (_("debugging symbol \"%s\" does "
1271 "not match selector; ignoring"),
1272 SYMBOL_LINKAGE_NAME (sym));
1277 values.sals = (struct symtab_and_line *)
1278 xmalloc (sizeof (struct symtab_and_line));
1281 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1283 /* Canonicalize this, so it remains resolved for dylib loads. */
1284 values.sals[0] = find_function_start_sal (sym, funfirstline);
1285 build_canonical_line_spec (values.sals,
1286 SYMBOL_NATURAL_NAME (sym), canonical);
1290 /* The only match was a non-debuggable symbol, which might point
1291 to a function descriptor; resolve it to the actual code address
1293 struct minimal_symbol *msymbol = (struct minimal_symbol *)sym_arr[0];
1294 struct objfile *objfile = msymbol_objfile (msymbol);
1295 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1296 CORE_ADDR pc = SYMBOL_VALUE_ADDRESS (msymbol);
1298 pc = gdbarch_convert_from_func_ptr_addr (gdbarch, pc,
1301 init_sal (&values.sals[0]);
1302 values.sals[0].pc = pc;
1309 /* More than one match. The user must choose one or more. */
1310 return decode_line_2 (sym_arr, i2, funfirstline, canonical);
1316 /* This handles C++ and Java compound data structures. P should point
1317 at the first component separator, i.e. double-colon or period. As
1318 an example, on entrance to this function we could have ARGPTR
1319 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1321 static struct symtabs_and_lines
1322 decode_compound (char **argptr, int funfirstline,
1323 struct linespec_result *canonical,
1324 char *the_real_saved_arg, char *p)
1326 struct symtabs_and_lines values;
1328 char *saved_arg2 = *argptr;
1332 struct symbol *sym_class;
1334 char *saved_java_argptr = NULL;
1337 /* If the user specified any completer quote characters in the input,
1338 strip them. They are superfluous. */
1339 saved_arg = alloca (strlen (the_real_saved_arg) + 1);
1341 char *dst = saved_arg;
1342 char *src = the_real_saved_arg;
1343 char *quotes = get_gdb_completer_quote_characters ();
1344 while (*src != '\0')
1346 if (strchr (quotes, *src) == NULL)
1353 /* First check for "global" namespace specification, of the form
1354 "::foo". If found, skip over the colons and jump to normal
1355 symbol processing. I.e. the whole line specification starts with
1356 "::" (note the condition that *argptr == p). */
1358 && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
1361 /* Given our example "AAA::inA::fun", we have two cases to consider:
1363 1) AAA::inA is the name of a class. In that case, presumably it
1364 has a method called "fun"; we then look up that method using
1367 2) AAA::inA isn't the name of a class. In that case, either the
1368 user made a typo, AAA::inA is the name of a namespace, or it is
1369 the name of a minimal symbol.
1370 We just look up AAA::inA::fun with lookup_symbol. If that fails,
1371 try lookup_minimal_symbol.
1373 Thus, our first task is to find everything before the last set of
1374 double-colons and figure out if it's the name of a class. So we
1375 first loop through all of the double-colons. */
1377 p2 = p; /* Save for restart. */
1379 /* This is very messy. Following the example above we have now the
1382 argptr -> "AAA::inA::fun
1383 saved_arg -> "AAA::inA::fun
1384 saved_arg2 -> "AAA::inA::fun
1385 p2 -> "::inA::fun". */
1387 /* In the loop below, with these strings, we'll make 2 passes, each
1388 is marked in comments. */
1392 static char *break_characters = " \t(";
1394 /* Move pointer up to next possible class/namespace token. */
1396 p = p2 + 1; /* Restart with old value +1. */
1398 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1399 i.e. if there is a double-colon, p will now point to the
1401 /* PASS2: p2->"::fun", p->":fun" */
1403 /* Move pointer ahead to next double-colon. */
1405 && strchr (break_characters, *p) == NULL
1406 && strchr (get_gdb_completer_quote_characters (), *p) == NULL)
1408 if (current_language->la_language == language_cplus)
1409 p += cp_validate_operator (p);
1413 temp_end = find_template_name_end (p);
1415 error (_("malformed template specification in command"));
1418 /* Note that, since, at the start of this loop, p would be
1419 pointing to the second colon in a double-colon, we only
1420 satisfy the condition below if there is another
1421 double-colon to the right (after). I.e. there is another
1422 component that can be a class or a namespace. I.e, if at
1423 the beginning of this loop (PASS1), we had
1424 p->":inA::fun", we'll trigger this when p has been
1425 advanced to point to "::fun". */
1426 /* PASS2: we will not trigger this. */
1427 else if ((p[0] == ':') && (p[1] == ':'))
1428 break; /* Found double-colon. */
1431 /* PASS2: We'll keep getting here, until P points to one of the
1432 break characters, at which point we exit this loop. */
1433 if (*p && strchr (break_characters, *p) == NULL)
1439 break; /* Out of the while (1). This would happen
1440 for instance if we have looked up
1441 unsuccessfully all the components of the
1442 string, and p->""(PASS2). */
1444 /* We get here if p points to one of the break characters or "" (i.e.,
1446 /* Save restart for next time around. */
1448 /* Restore argptr as it was on entry to this function. */
1449 *argptr = saved_arg2;
1450 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1453 /* All ready for next pass through the loop. */
1457 /* Start of lookup in the symbol tables. */
1459 /* Lookup in the symbol table the substring between argptr and
1460 p. Note, this call changes the value of argptr. */
1461 /* Before the call, argptr->"AAA::inA::fun",
1462 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1464 sym_class = lookup_prefix_sym (argptr, p2);
1466 /* If sym_class has been found, and if "AAA::inA" is a class, then
1467 we're in case 1 above. So we look up "fun" as a method of that
1470 (t = check_typedef (SYMBOL_TYPE (sym_class)),
1471 (TYPE_CODE (t) == TYPE_CODE_STRUCT
1472 || TYPE_CODE (t) == TYPE_CODE_UNION)))
1474 /* Arg token is not digits => try it as a function name.
1475 Find the next token (everything up to end or next
1478 && strchr (get_gdb_completer_quote_characters (),
1481 p = skip_quoted (*argptr);
1482 *argptr = *argptr + 1;
1486 /* At this point argptr->"fun". */
1490 while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':'
1493 /* At this point p->"". String ended. */
1494 /* Nope, C++ operators could have spaces in them
1495 ("foo::operator <" or "foo::operator delete []").
1496 I apologize, this is a bit hacky... */
1497 if (current_language->la_language == language_cplus
1498 && *p == ' ' && p - 8 - *argptr + 1 > 0)
1500 /* The above loop has already swallowed "operator". */
1501 p += cp_validate_operator (p - 8) - 8;
1504 /* Keep any important naming information. */
1505 p = keep_name_info (p);
1507 /* Java may append typenames, so assume that if there is
1508 anything else left in *argptr, it must be a typename. */
1509 if (*p && current_language->la_language == language_java)
1516 copy = (char *) alloca (p2 - p + 1);
1517 memcpy (copy, p, p2 - p);
1518 copy[p2 - p] = '\0';
1519 type = lookup_typename (current_language, get_current_arch (),
1523 /* Save the location of this just in case this
1524 method/type combination isn't actually defined.
1525 It will be checked later. */
1526 saved_java_argptr = p;
1532 /* Allocate our own copy of the substring between argptr and
1534 copy = (char *) alloca (p - *argptr + 1);
1535 memcpy (copy, *argptr, p - *argptr);
1536 copy[p - *argptr] = '\0';
1538 && copy[p - *argptr - 1]
1539 && strchr (get_gdb_completer_quote_characters (),
1540 copy[p - *argptr - 1]) != NULL)
1541 copy[p - *argptr - 1] = '\0';
1543 /* At this point copy->"fun", p->"". */
1545 /* No line number may be specified. */
1546 while (*p == ' ' || *p == '\t')
1549 /* At this point arptr->"". */
1551 /* Look for copy as a method of sym_class. */
1552 /* At this point copy->"fun", sym_class is "AAA:inA",
1553 saved_arg->"AAA::inA::fun". This concludes the scanning of
1554 the string for possible components matches. If we find it
1555 here, we return. If not, and we are at the and of the string,
1556 we'll lookup the whole string in the symbol tables. */
1558 values = find_method (funfirstline, canonical, saved_arg,
1559 copy, t, sym_class);
1560 if (saved_java_argptr != NULL && values.nelts == 1)
1562 /* The user specified a specific return type for a java method.
1563 Double-check that it really is the one the user specified.
1564 [This is a necessary evil because strcmp_iw_ordered stops
1565 comparisons too prematurely.] */
1566 sym = find_pc_sect_function (values.sals[0].pc,
1567 values.sals[0].section);
1568 /* We just found a SAL, we had better be able to go backwards! */
1569 gdb_assert (sym != NULL);
1570 if (strcmp_iw (SYMBOL_LINKAGE_NAME (sym), saved_arg) != 0)
1572 xfree (values.sals);
1573 error (_("the class `%s' does not have "
1574 "any method instance named %s"),
1575 SYMBOL_PRINT_NAME (sym_class), copy);
1579 } /* End if symbol found. */
1582 /* We couldn't find a class, so we're in case 2 above. We check the
1583 entire name as a symbol instead. */
1585 p = keep_name_info (p);
1587 copy = (char *) alloca (p - saved_arg2 + 1);
1588 memcpy (copy, saved_arg2, p - saved_arg2);
1589 /* Note: if is_quoted should be true, we snuff out quote here
1591 copy[p - saved_arg2] = '\000';
1592 /* Set argptr to skip over the name. */
1593 *argptr = (*p == '\'') ? p + 1 : p;
1595 /* Look up entire name. */
1596 sym = lookup_symbol (copy, get_selected_block (0), VAR_DOMAIN, 0);
1598 return symbol_found (funfirstline, canonical, copy, sym, NULL, NULL);
1601 struct minimal_symbol *msym;
1603 /* Couldn't find any interpretation as classes/namespaces. As a last
1604 resort, try the minimal symbol tables. */
1605 msym = lookup_minimal_symbol (copy, NULL, NULL);
1607 return minsym_found (funfirstline, msym);
1610 /* Couldn't find a minimal symbol, either, so give up. */
1611 cplusplus_error (the_real_saved_arg,
1612 "Can't find member of namespace, "
1613 "class, struct, or union named \"%s\"\n",
1617 /* Next come some helper functions for decode_compound. */
1619 /* Return the symbol corresponding to the substring of *ARGPTR ending
1620 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1621 name in question, the compound object separator ("::" or "."), and
1622 whitespace. Note that *ARGPTR is changed whether or not the
1623 lookup_symbol call finds anything (i.e we return NULL). As an
1624 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1626 static struct symbol *
1627 lookup_prefix_sym (char **argptr, char *p)
1633 /* Extract the class name. */
1635 while (p != *argptr && p[-1] == ' ')
1637 copy = (char *) alloca (p - *argptr + 1);
1638 memcpy (copy, *argptr, p - *argptr);
1639 copy[p - *argptr] = 0;
1641 /* Discard the class name from the argptr. */
1642 p = p1 + (p1[0] == ':' ? 2 : 1);
1643 while (*p == ' ' || *p == '\t')
1647 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1648 argptr->"inA::fun". */
1650 sym = lookup_symbol (copy, get_selected_block (0), STRUCT_DOMAIN, 0);
1653 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1654 fail when the user attempts to lookup a method of a class
1655 via a typedef'd name (NOT via the class's name, which is already
1656 handled in symbol_matches_domain). So try the lookup again
1657 using VAR_DOMAIN (where typedefs live) and double-check that we
1658 found a struct/class type. */
1659 struct symbol *s = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1663 struct type *t = SYMBOL_TYPE (s);
1666 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
1674 /* This finds the method COPY in the class whose type is T and whose
1675 symbol is SYM_CLASS. */
1677 static struct symtabs_and_lines
1678 find_method (int funfirstline, struct linespec_result *canonical,
1680 char *copy, struct type *t, struct symbol *sym_class)
1682 struct symtabs_and_lines values;
1683 struct symbol *sym = NULL;
1684 int i1; /* Counter for the symbol array. */
1685 struct symbol **sym_arr = alloca (total_number_of_methods (t)
1686 * sizeof (struct symbol *));
1688 /* Find all methods with a matching name, and put them in
1691 i1 = find_methods (t, copy, SYMBOL_LANGUAGE (sym_class), sym_arr);
1695 /* There is exactly one field with that name. */
1698 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1700 values.sals = (struct symtab_and_line *)
1701 xmalloc (sizeof (struct symtab_and_line));
1703 values.sals[0] = find_function_start_sal (sym,
1715 /* If we were given a specific overload instance, use that
1716 (or error if no matches were found). Otherwise ask the user
1717 which one to use. */
1718 if (strchr (copy, '('))
1723 struct cleanup *cleanup;
1725 /* Construct the proper search name based on SYM_CLASS and COPY.
1726 SAVED_ARG may contain a valid name, but that name might not be
1727 what is actually stored in the symbol table. For example,
1728 if SAVED_ARG (and SYM_CLASS) were found via an import
1729 ("using namespace" in C++), then the physname of
1730 SYM_CLASS ("A::myclass") may not be the same as SAVED_ARG
1732 name = xmalloc (strlen (SYMBOL_NATURAL_NAME (sym_class))
1733 + 2 /* "::" */ + strlen (copy) + 1);
1734 strcpy (name, SYMBOL_NATURAL_NAME (sym_class));
1735 strcat (name, "::");
1736 strcat (name, copy);
1737 canon = cp_canonicalize_string (name);
1743 cleanup = make_cleanup (xfree, name);
1745 for (i = 0; i < i1; ++i)
1747 if (strcmp_iw (name, SYMBOL_LINKAGE_NAME (sym_arr[i])) == 0)
1749 values.sals = (struct symtab_and_line *)
1750 xmalloc (sizeof (struct symtab_and_line));
1752 values.sals[0] = find_function_start_sal (sym_arr[i],
1754 do_cleanups (cleanup);
1759 error (_("the class `%s' does not have "
1760 "any method instance named %s"),
1761 SYMBOL_PRINT_NAME (sym_class), copy);
1764 return decode_line_2 (sym_arr, i1, funfirstline, canonical);
1769 cplusplus_error (saved_arg,
1770 "the class `%s' does not have destructor defined\n",
1771 SYMBOL_PRINT_NAME (sym_class));
1773 cplusplus_error (saved_arg,
1774 "the class %s does not have any method named %s\n",
1775 SYMBOL_PRINT_NAME (sym_class), copy);
1781 /* Return the symtab associated to the filename given by the substring
1782 of *ARGPTR ending at P, and advance ARGPTR past that filename. */
1784 static struct symtab *
1785 symtab_from_filename (char **argptr, char *p, int is_quote_enclosed)
1789 struct symtab *file_symtab;
1792 while (p != *argptr && p[-1] == ' ')
1794 if ((*p == '"') && is_quote_enclosed)
1796 copy = (char *) alloca (p - *argptr + 1);
1797 memcpy (copy, *argptr, p - *argptr);
1798 /* It may have the ending quote right after the file name. */
1799 if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
1800 || copy[p - *argptr - 1] == '\'')
1801 copy[p - *argptr - 1] = 0;
1803 copy[p - *argptr] = 0;
1805 /* Find that file's data. */
1806 file_symtab = lookup_symtab (copy);
1807 if (file_symtab == 0)
1809 if (!have_full_symbols () && !have_partial_symbols ())
1810 throw_error (NOT_FOUND_ERROR,
1811 _("No symbol table is loaded. "
1812 "Use the \"file\" command."));
1813 throw_error (NOT_FOUND_ERROR, _("No source file named %s."), copy);
1816 /* Discard the file name from the arg. */
1818 while (*p == ' ' || *p == '\t')
1825 /* Look up a function symbol in *ARGPTR. If found, advance *ARGPTR
1826 and return the symbol. If not found, return NULL. */
1828 static struct symbol *
1829 find_function_symbol (char **argptr, char *p, int is_quote_enclosed)
1833 struct symbol *function_symbol;
1836 while (p != *argptr && p[-1] == ' ')
1838 if ((*p == '"') && is_quote_enclosed)
1840 copy = (char *) alloca (p - *argptr + 1);
1841 memcpy (copy, *argptr, p - *argptr);
1842 /* It may have the ending quote right after the file name. */
1843 if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
1844 || copy[p - *argptr - 1] == '\'')
1845 copy[p - *argptr - 1] = 0;
1847 copy[p - *argptr] = 0;
1849 function_symbol = lookup_symbol (copy, get_selected_block (0),
1851 if (!function_symbol || SYMBOL_CLASS (function_symbol) != LOC_BLOCK)
1854 /* Discard the file name from the arg. */
1856 while (*p == ' ' || *p == '\t')
1860 return function_symbol;
1865 /* This decodes a line where the argument is all digits (possibly
1866 preceded by a sign). Q should point to the end of those digits;
1867 the other arguments are as usual. */
1869 static struct symtabs_and_lines
1870 decode_all_digits (char **argptr, struct symtab *default_symtab,
1871 int default_line, struct linespec_result *canonical,
1872 struct symtab *file_symtab, char *q)
1875 struct symtabs_and_lines values;
1876 struct symtab_and_line val;
1884 /* We might need a canonical line spec if no file was specified. */
1885 int need_canonical = (file_symtab == NULL) ? 1 : 0;
1889 val.pspace = current_program_space;
1891 /* This is where we need to make sure that we have good defaults.
1892 We must guarantee that this section of code is never executed
1893 when we are called with just a function name, since
1894 set_default_source_symtab_and_line uses
1895 select_source_symtab that calls us with such an argument. */
1897 if (file_symtab == 0 && default_symtab == 0)
1899 /* Make sure we have at least a default source file. */
1900 set_default_source_symtab_and_line ();
1901 initialize_defaults (&default_symtab, &default_line);
1904 if (**argptr == '+')
1905 sign = plus, (*argptr)++;
1906 else if (**argptr == '-')
1907 sign = minus, (*argptr)++;
1908 val.line = atoi (*argptr);
1914 if (file_symtab == 0)
1915 val.line = default_line + val.line;
1920 if (file_symtab == 0)
1921 val.line = default_line - val.line;
1926 break; /* No need to adjust val.line. */
1929 while (*q == ' ' || *q == '\t')
1932 if (file_symtab == 0)
1933 file_symtab = default_symtab;
1935 /* It is possible that this source file has more than one symtab,
1936 and that the new line number specification has moved us from the
1937 default (in file_symtab) to a new one. */
1938 val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL);
1939 if (val.symtab == 0)
1940 val.symtab = file_symtab;
1942 val.pspace = SYMTAB_PSPACE (val.symtab);
1944 values.sals = (struct symtab_and_line *)
1945 xmalloc (sizeof (struct symtab_and_line));
1946 values.sals[0] = val;
1949 build_canonical_line_spec (values.sals, NULL, canonical);
1950 values.sals[0].explicit_line = 1;
1956 /* Decode a linespec starting with a dollar sign. */
1958 static struct symtabs_and_lines
1959 decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
1960 struct linespec_result *canonical, struct symtab *file_symtab)
1964 int need_canonical = 0;
1965 struct symtabs_and_lines values;
1966 struct symtab_and_line val;
1969 struct minimal_symbol *msymbol;
1971 p = (copy[1] == '$') ? copy + 2 : copy + 1;
1972 while (*p >= '0' && *p <= '9')
1974 if (!*p) /* Reached end of token without hitting non-digit. */
1976 /* We have a value history reference. */
1977 struct value *val_history;
1979 sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
1980 val_history = access_value_history ((copy[1] == '$') ? -index : index);
1981 if (TYPE_CODE (value_type (val_history)) != TYPE_CODE_INT)
1982 error (_("History values used in line "
1983 "specs must have integer values."));
1984 valx = value_as_long (val_history);
1988 /* Not all digits -- may be user variable/function or a
1989 convenience variable. */
1991 /* Look up entire name as a symbol first. */
1992 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1993 file_symtab = (struct symtab *) NULL;
1995 /* Symbol was found --> jump to normal symbol processing. */
1997 return symbol_found (funfirstline, canonical, copy, sym, NULL, NULL);
1999 /* If symbol was not found, look in minimal symbol tables. */
2000 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
2001 /* Min symbol was found --> jump to minsym processing. */
2003 return minsym_found (funfirstline, msymbol);
2005 /* Not a user variable or function -- must be convenience variable. */
2006 if (!get_internalvar_integer (lookup_internalvar (copy + 1), &valx))
2007 error (_("Convenience variables used in line "
2008 "specs must have integer values."));
2013 /* Either history value or convenience value from above, in valx. */
2014 val.symtab = file_symtab ? file_symtab : default_symtab;
2017 val.pspace = current_program_space;
2019 values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
2020 values.sals[0] = val;
2024 build_canonical_line_spec (values.sals, NULL, canonical);
2031 /* A helper for decode_line_1 that tries to find a label. The label
2032 is searched for in the current block.
2033 FUNCTION_SYMBOL is the enclosing function; or NULL if none
2035 COPY is the name of the label to find.
2036 CANONICAL is the same as the "canonical" argument to decode_line_1.
2037 RESULT is a pointer to a symtabs_and_lines structure which will be
2038 filled in on success.
2039 This function returns 1 if a label was found, 0 otherwise. */
2042 decode_label (struct symbol *function_symbol, char *copy,
2043 struct linespec_result *canonical,
2044 struct symtabs_and_lines *result)
2047 struct block *block;
2049 if (function_symbol)
2050 block = SYMBOL_BLOCK_VALUE (function_symbol);
2053 block = get_selected_block (0);
2055 block && !BLOCK_FUNCTION (block);
2056 block = BLOCK_SUPERBLOCK (block))
2060 function_symbol = BLOCK_FUNCTION (block);
2063 sym = lookup_symbol (copy, block, LABEL_DOMAIN, 0);
2066 *result = symbol_found (0, canonical, copy, sym, NULL, function_symbol);
2071 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
2072 look in that symtab's static variables first. */
2074 static struct symtabs_and_lines
2075 decode_variable (char *copy, int funfirstline,
2076 struct linespec_result *canonical,
2077 struct symtab *file_symtab)
2080 struct minimal_symbol *msymbol;
2082 sym = lookup_symbol (copy,
2084 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab),
2086 : get_selected_block (0)),
2090 return symbol_found (funfirstline, canonical, copy, sym, file_symtab, NULL);
2092 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
2094 if (msymbol != NULL)
2095 return minsym_found (funfirstline, msymbol);
2097 if (!have_full_symbols ()
2098 && !have_partial_symbols ()
2099 && !have_minimal_symbols ())
2100 throw_error (NOT_FOUND_ERROR,
2101 _("No symbol table is loaded. Use the \"file\" command."));
2102 throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy);
2108 /* Now come some functions that are called from multiple places within
2111 /* We've found a symbol SYM to associate with our linespec; build a
2112 corresponding struct symtabs_and_lines. */
2114 static struct symtabs_and_lines
2115 symbol_found (int funfirstline, struct linespec_result *canonical, char *copy,
2116 struct symbol *sym, struct symtab *file_symtab,
2117 struct symbol *function_symbol)
2119 struct symtabs_and_lines values;
2121 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
2123 /* Arg is the name of a function. */
2124 values.sals = (struct symtab_and_line *)
2125 xmalloc (sizeof (struct symtab_and_line));
2126 values.sals[0] = find_function_start_sal (sym, funfirstline);
2129 /* Don't use the SYMBOL_LINE; if used at all it points to
2130 the line containing the parameters or thereabouts, not
2131 the first line of code. */
2133 /* We might need a canonical line spec if it is a static
2135 if (file_symtab == 0)
2137 struct blockvector *bv = BLOCKVECTOR (SYMBOL_SYMTAB (sym));
2138 struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
2140 if (lookup_block_symbol (b, copy, VAR_DOMAIN) != NULL)
2141 build_canonical_line_spec (values.sals, copy, canonical);
2147 if (SYMBOL_CLASS (sym) == LOC_LABEL && SYMBOL_VALUE_ADDRESS (sym) != 0)
2149 /* We know its line number. */
2150 values.sals = (struct symtab_and_line *)
2151 xmalloc (sizeof (struct symtab_and_line));
2153 init_sal (&values.sals[0]);
2154 values.sals[0].symtab = SYMBOL_SYMTAB (sym);
2155 values.sals[0].line = SYMBOL_LINE (sym);
2156 values.sals[0].pc = SYMBOL_VALUE_ADDRESS (sym);
2157 values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
2158 values.sals[0].explicit_pc = 1;
2162 canonical->special_display = 1;
2163 canonical->canonical = xmalloc (sizeof (char *));
2164 canonical->canonical[0]
2165 = xstrprintf ("%s:%s",
2166 SYMBOL_NATURAL_NAME (function_symbol),
2167 SYMBOL_NATURAL_NAME (sym));
2172 else if (funfirstline)
2173 error (_("\"%s\" is not a function"), copy);
2174 else if (SYMBOL_LINE (sym) != 0)
2176 /* We know its line number. */
2177 values.sals = (struct symtab_and_line *)
2178 xmalloc (sizeof (struct symtab_and_line));
2180 memset (&values.sals[0], 0, sizeof (values.sals[0]));
2181 values.sals[0].symtab = SYMBOL_SYMTAB (sym);
2182 values.sals[0].line = SYMBOL_LINE (sym);
2183 values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
2187 /* This can happen if it is compiled with a compiler which doesn't
2188 put out line numbers for variables. */
2189 /* FIXME: Shouldn't we just set .line and .symtab to zero
2190 and return? For example, "info line foo" could print
2192 error (_("Line number not known for symbol \"%s\""), copy);
2196 /* We've found a minimal symbol MSYMBOL to associate with our
2197 linespec; build a corresponding struct symtabs_and_lines. */
2199 static struct symtabs_and_lines
2200 minsym_found (int funfirstline, struct minimal_symbol *msymbol)
2202 struct objfile *objfile = msymbol_objfile (msymbol);
2203 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2204 struct symtabs_and_lines values;
2207 values.sals = (struct symtab_and_line *)
2208 xmalloc (sizeof (struct symtab_and_line));
2209 values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
2210 (struct obj_section *) 0, 0);
2211 values.sals[0].section = SYMBOL_OBJ_SECTION (msymbol);
2213 /* The minimal symbol might point to a function descriptor;
2214 resolve it to the actual code address instead. */
2215 pc = gdbarch_convert_from_func_ptr_addr (gdbarch,
2218 if (pc != values.sals[0].pc)
2219 values.sals[0] = find_pc_sect_line (pc, NULL, 0);
2222 skip_prologue_sal (&values.sals[0]);
2229 init_linespec_result (struct linespec_result *lr)
2231 memset (lr, 0, sizeof (*lr));