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,
69 struct symtab *file_symtab,
73 static struct symbol *lookup_prefix_sym (char **argptr, char *p,
76 static struct symtabs_and_lines find_method (int funfirstline,
77 struct linespec_result *canonical,
81 struct symbol *sym_class,
84 static void cplusplus_error (const char *name, const char *fmt, ...)
85 ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (2, 3);
87 static int total_number_of_methods (struct type *type);
89 static int find_methods (struct type *, char *,
90 enum language, struct symbol **, struct symtab *);
92 static int add_matching_methods (int method_counter, struct type *t,
93 enum language language,
94 struct symbol **sym_arr);
96 static int add_constructors (int method_counter, struct type *t,
97 enum language language,
98 struct symbol **sym_arr);
100 static void build_canonical_line_spec (struct symtab_and_line *,
101 char *, struct linespec_result *);
103 static char *find_toplevel_char (char *s, char c);
105 static int is_objc_method_format (const char *s);
107 static struct symtabs_and_lines decode_line_2 (struct symbol *[],
109 struct linespec_result *);
111 static struct symtab *symtab_from_filename (char **argptr,
112 char *p, int is_quote_enclosed);
114 static struct symbol *find_function_symbol (char **argptr, char *p,
115 int is_quote_enclosed);
118 symtabs_and_lines decode_all_digits (char **argptr,
119 struct symtab *default_symtab,
121 struct linespec_result *canonical,
122 struct symtab *file_symtab,
125 static struct symtabs_and_lines decode_dollar (char *copy,
127 struct symtab *default_symtab,
128 struct linespec_result *canonical,
129 struct symtab *file_symtab);
131 static int decode_label (struct symbol *function_symbol,
132 char *copy, struct linespec_result *canonical,
133 struct symtabs_and_lines *result);
135 static struct symtabs_and_lines decode_variable (char *copy,
137 struct linespec_result *canonical,
138 struct symtab *file_symtab);
141 symtabs_and_lines symbol_found (int funfirstline,
142 struct linespec_result *canonical,
145 struct symtab *file_symtab,
146 struct symbol *function_symbol);
149 symtabs_and_lines minsym_found (int funfirstline,
150 struct minimal_symbol *msymbol);
152 /* Helper functions. */
154 /* Issue a helpful hint on using the command completion feature on
155 single quoted demangled C++ symbols as part of the completion
159 cplusplus_error (const char *name, const char *fmt, ...)
161 struct ui_file *tmp_stream;
164 tmp_stream = mem_fileopen ();
165 make_cleanup_ui_file_delete (tmp_stream);
170 va_start (args, fmt);
171 vfprintf_unfiltered (tmp_stream, fmt, args);
175 while (*name == '\'')
177 fprintf_unfiltered (tmp_stream,
178 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
179 "(Note leading single quote.)"),
182 message = ui_file_xstrdup (tmp_stream, NULL);
183 make_cleanup (xfree, message);
184 throw_error (NOT_FOUND_ERROR, "%s", message);
187 /* Return the number of methods described for TYPE, including the
188 methods from types it derives from. This can't be done in the symbol
189 reader because the type of the baseclass might still be stubbed
190 when the definition of the derived class is parsed. */
193 total_number_of_methods (struct type *type)
198 CHECK_TYPEDEF (type);
199 if (! HAVE_CPLUS_STRUCT (type))
201 count = TYPE_NFN_FIELDS_TOTAL (type);
203 for (n = 0; n < TYPE_N_BASECLASSES (type); n++)
204 count += total_number_of_methods (TYPE_BASECLASS (type, n));
209 /* Returns the block to be used for symbol searches for the given SYMTAB,
210 which may be NULL. */
212 static struct block *
213 get_search_block (struct symtab *symtab)
218 block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
221 enum language save_language;
223 /* get_selected_block can change the current language when there is
224 no selected frame yet. */
225 save_language = current_language->la_language;
226 block = get_selected_block (0);
227 set_language (save_language);
233 /* Recursive helper function for decode_line_1.
234 Look for methods named NAME in type T.
235 Return number of matches.
236 Put matches in SYM_ARR, which should have been allocated with
237 a size of total_number_of_methods (T) * sizeof (struct symbol *).
238 Note that this function is g++ specific. */
241 find_methods (struct type *t, char *name, enum language language,
242 struct symbol **sym_arr, struct symtab *file_symtab)
246 char *class_name = type_name_no_tag (t);
247 struct cleanup *cleanup;
250 /* NAME is typed by the user: it needs to be canonicalized before
251 passing to lookup_symbol. */
252 canon = cp_canonicalize_string (name);
256 cleanup = make_cleanup (xfree, name);
259 cleanup = make_cleanup (null_cleanup, NULL);
261 /* Ignore this class if it doesn't have a name. This is ugly, but
262 unless we figure out how to get the physname without the name of
263 the class, then the loop can't do any good. */
265 && (lookup_symbol_in_language (class_name, get_search_block (file_symtab),
266 STRUCT_DOMAIN, language, (int *) NULL)))
269 int name_len = strlen (name);
273 /* Loop over each method name. At this level, all overloads of a name
274 are counted as a single name. There is an inner loop which loops over
277 for (method_counter = TYPE_NFN_FIELDS (t) - 1;
281 char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
284 if (strncmp (method_name, "__", 2) == 0 ||
285 strncmp (method_name, "op", 2) == 0 ||
286 strncmp (method_name, "type", 4) == 0)
288 if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI))
289 method_name = dem_opname;
290 else if (cplus_demangle_opname (method_name, dem_opname, 0))
291 method_name = dem_opname;
294 if (strcmp_iw (name, method_name) == 0)
295 /* Find all the overloaded methods with that name. */
296 i1 += add_matching_methods (method_counter, t, language,
298 else if (strncmp (class_name, name, name_len) == 0
299 && (class_name[name_len] == '\0'
300 || class_name[name_len] == '<'))
301 i1 += add_constructors (method_counter, t, language,
306 /* Only search baseclasses if there is no match yet, since names in
307 derived classes override those in baseclasses.
309 FIXME: The above is not true; it is only true of member functions
310 if they have the same number of arguments (??? - section 13.1 of the
311 ARM says the function members are not in the same scope but doesn't
312 really spell out the rules in a way I understand. In any case, if
313 the number of arguments differ this is a case in which we can overload
314 rather than hiding without any problem, and gcc 2.4.5 does overload
315 rather than hiding in this case). */
318 for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
319 i1 += find_methods (TYPE_BASECLASS (t, ibase), name,
320 language, sym_arr + i1, file_symtab);
322 do_cleanups (cleanup);
326 /* Add the symbols associated to methods of the class whose type is T
327 and whose name matches the method indexed by METHOD_COUNTER in the
328 array SYM_ARR. Return the number of methods added. */
331 add_matching_methods (int method_counter, struct type *t,
332 enum language language, struct symbol **sym_arr)
337 for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
342 const char *phys_name;
344 f = TYPE_FN_FIELDLIST1 (t, method_counter);
346 if (TYPE_FN_FIELD_STUB (f, field_counter))
348 char *tmp_name, *tmp2;
350 tmp_name = gdb_mangle_name (t,
353 tmp2 = alloca (strlen (tmp_name) + 1);
354 strcpy (tmp2, tmp_name);
359 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
361 sym_arr[i1] = lookup_symbol_in_language (phys_name,
369 /* This error message gets printed, but the method
370 still seems to be found.
371 fputs_filtered("(Cannot find method ", gdb_stdout);
372 fprintf_symbol_filtered (gdb_stdout, phys_name,
374 DMGL_PARAMS | DMGL_ANSI);
375 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
383 /* Add the symbols associated to constructors of the class whose type
384 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
385 array SYM_ARR. Return the number of methods added. */
388 add_constructors (int method_counter, struct type *t,
389 enum language language, struct symbol **sym_arr)
394 /* For GCC 3.x and stabs, constructors and destructors
395 have names like __base_ctor and __complete_dtor.
396 Check the physname for now if we're looking for a
399 = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
404 const char *phys_name;
406 f = TYPE_FN_FIELDLIST1 (t, method_counter);
408 /* GCC 3.x will never produce stabs stub methods, so
409 we don't need to handle this case. */
410 if (TYPE_FN_FIELD_STUB (f, field_counter))
412 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
413 if (! is_constructor_name (phys_name))
416 /* If this method is actually defined, include it in the
418 sym_arr[i1] = lookup_symbol_in_language (phys_name,
429 /* Helper function for decode_line_1.
430 Build a canonical line spec in CANONICAL if it is non-NULL and if
431 the SAL has a symtab.
432 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
433 If SYMNAME is NULL the line number from SAL is used and the canonical
434 line spec is `filename:linenum'. */
437 build_canonical_line_spec (struct symtab_and_line *sal, char *symname,
438 struct linespec_result *canonical)
440 char **canonical_arr;
441 char *canonical_name;
443 struct symtab *s = sal->symtab;
445 if (s == (struct symtab *) NULL
446 || s->filename == (char *) NULL
447 || canonical == NULL)
450 canonical_arr = (char **) xmalloc (sizeof (char *));
451 canonical->canonical = canonical_arr;
453 filename = s->filename;
456 canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2);
457 sprintf (canonical_name, "%s:%s", filename, symname);
461 canonical_name = xmalloc (strlen (filename) + 30);
462 sprintf (canonical_name, "%s:%d", filename, sal->line);
464 canonical_arr[0] = canonical_name;
469 /* Find an instance of the character C in the string S that is outside
470 of all parenthesis pairs, single-quoted strings, and double-quoted
471 strings. Also, ignore the char within a template name, like a ','
472 within foo<int, int>. */
475 find_toplevel_char (char *s, char c)
477 int quoted = 0; /* zero if we're not in quotes;
478 '"' if we're in a double-quoted string;
479 '\'' if we're in a single-quoted string. */
480 int depth = 0; /* Number of unclosed parens we've seen. */
483 for (scan = s; *scan; scan++)
489 else if (*scan == '\\' && *(scan + 1))
492 else if (*scan == c && ! quoted && depth == 0)
494 else if (*scan == '"' || *scan == '\'')
496 else if (*scan == '(' || *scan == '<')
498 else if ((*scan == ')' || *scan == '>') && depth > 0)
505 /* Determines if the gives string corresponds to an Objective-C method
506 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
507 are allowed to have spaces and parentheses in them. */
510 is_objc_method_format (const char *s)
512 if (s == NULL || *s == '\0')
514 /* Handle arguments with the format FILENAME:SYMBOL. */
515 if ((s[0] == ':') && (strchr ("+-", s[1]) != NULL)
516 && (s[2] == '[') && strchr(s, ']'))
518 /* Handle arguments that are just SYMBOL. */
519 else if ((strchr ("+-", s[0]) != NULL) && (s[1] == '[') && strchr(s, ']'))
524 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
525 operate on (ask user if necessary).
526 If CANONICAL is non-NULL return a corresponding array of mangled names
527 as canonical line specs there. */
529 static struct symtabs_and_lines
530 decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline,
531 struct linespec_result *canonical)
533 struct symtabs_and_lines values, return_values;
538 struct cleanup *old_chain;
539 char **canonical_arr = (char **) NULL;
540 const char *select_mode = multiple_symbols_select_mode ();
542 if (select_mode == multiple_symbols_cancel)
543 error (_("canceled because the command is ambiguous\n"
544 "See set/show multiple-symbol."));
546 values.sals = (struct symtab_and_line *)
547 alloca (nelts * sizeof (struct symtab_and_line));
548 return_values.sals = (struct symtab_and_line *)
549 xmalloc (nelts * sizeof (struct symtab_and_line));
550 old_chain = make_cleanup (xfree, return_values.sals);
554 canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
555 make_cleanup (xfree, canonical_arr);
556 memset (canonical_arr, 0, nelts * sizeof (char *));
557 canonical->canonical = canonical_arr;
563 init_sal (&return_values.sals[i]); /* Initialize to zeroes. */
564 init_sal (&values.sals[i]);
565 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
566 values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
570 /* If select_mode is "all", then do not print the multiple-choice
571 menu and act as if the user had chosen choice "1" (all). */
572 if (select_mode == multiple_symbols_all
573 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
578 printf_unfiltered (_("[0] cancel\n[1] all\n"));
581 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
583 if (values.sals[i].symtab)
584 printf_unfiltered ("[%d] %s at %s:%d\n",
586 SYMBOL_PRINT_NAME (sym_arr[i]),
587 values.sals[i].symtab->filename,
588 values.sals[i].line);
590 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? "
591 "Probably broken debug info...]\n"),
593 SYMBOL_PRINT_NAME (sym_arr[i]),
594 values.sals[i].line);
598 printf_unfiltered (_("?HERE\n"));
602 prompt = getenv ("PS2");
607 args = command_line_input (prompt, 0, "overload-choice");
610 if (args == 0 || *args == 0)
611 error_no_arg (_("one or more choice numbers"));
619 while (*arg1 >= '0' && *arg1 <= '9')
621 if (*arg1 && *arg1 != ' ' && *arg1 != '\t')
622 error (_("Arguments must be choice numbers."));
627 error (_("canceled"));
632 for (i = 0; i < nelts; i++)
634 if (canonical_arr[i] == NULL)
636 symname = SYMBOL_LINKAGE_NAME (sym_arr[i]);
637 canonical_arr[i] = xstrdup (symname);
641 memcpy (return_values.sals, values.sals,
642 (nelts * sizeof (struct symtab_and_line)));
643 return_values.nelts = nelts;
644 discard_cleanups (old_chain);
645 return return_values;
648 if (num >= nelts + 2)
650 printf_unfiltered (_("No choice number %d.\n"), num);
655 if (values.sals[num].pc)
659 symname = SYMBOL_LINKAGE_NAME (sym_arr[num]);
660 make_cleanup (xfree, symname);
661 canonical_arr[i] = xstrdup (symname);
663 return_values.sals[i++] = values.sals[num];
664 values.sals[num].pc = 0;
668 printf_unfiltered (_("duplicate request for %d ignored.\n"),
674 while (*args == ' ' || *args == '\t')
677 return_values.nelts = i;
678 discard_cleanups (old_chain);
679 return return_values;
682 /* Valid delimiters for linespec keywords "if", "thread" or "task". */
685 is_linespec_boundary (char c)
687 return c == ' ' || c == '\t' || c == '\0' || c == ',';
690 /* A helper function for decode_line_1 and friends which skips P
691 past any method overload information at the beginning of P, e.g.,
692 "(const struct foo *)".
694 This function assumes that P has already been validated to contain
695 overload information, and it will assert if *P != '('. */
697 find_method_overload_end (char *p)
701 gdb_assert (*p == '(');
721 /* Keep important information used when looking up a name. This includes
722 template parameters, overload information, and important keywords, including
723 the possible Java trailing type. */
726 keep_name_info (char *p, int on_boundary)
728 const char *quotes = get_gdb_completer_quote_characters ();
734 if (strchr (quotes, *p))
737 if (*p == ',' && !nest)
740 if (on_boundary && !nest)
742 const char *const words[] = { "if", "thread", "task" };
745 for (wordi = 0; wordi < ARRAY_SIZE (words); wordi++)
746 if (strncmp (p, words[wordi], strlen (words[wordi])) == 0
747 && is_linespec_boundary (p[strlen (words[wordi])]))
749 if (wordi < ARRAY_SIZE (words))
753 if (*p == '(' || *p == '<' || *p == '[')
755 else if ((*p == ')' || *p == '>' || *p == ']') && nest > 0)
760 /* The ',' check could fail on "operator ,". */
761 p += cp_validate_operator (p);
763 on_boundary = is_linespec_boundary (p[-1]);
766 while (p > saved_p && is_linespec_boundary (p[-1]))
773 /* The parser of linespec itself. */
775 /* Parse a string that specifies a line number.
776 Pass the address of a char * variable; that variable will be
777 advanced over the characters actually parsed.
781 LINENUM -- that line number in current file. PC returned is 0.
782 FILE:LINENUM -- that line in that file. PC returned is 0.
783 FUNCTION -- line number of openbrace of that function.
784 PC returned is the start of the function.
785 LABEL -- a label in the current scope
786 VARIABLE -- line number of definition of that variable.
788 FILE:FUNCTION -- likewise, but prefer functions in that file.
789 *EXPR -- line in which address EXPR appears.
791 This may all be followed by an "if EXPR", which we ignore.
793 FUNCTION may be an undebuggable function found in minimal symbol table.
795 If the argument FUNFIRSTLINE is nonzero, we want the first line
796 of real code inside a function when a function is specified, and it is
797 not OK to specify a variable or type to get its line number.
799 DEFAULT_SYMTAB specifies the file to use if none is specified.
800 It defaults to current_source_symtab.
801 DEFAULT_LINE specifies the line number to use for relative
802 line numbers (that start with signs). Defaults to current_source_line.
803 If CANONICAL is non-NULL, store an array of strings containing the canonical
804 line specs there if necessary. Currently overloaded member functions and
805 line numbers or static functions without a filename yield a canonical
806 line spec. The array and the line spec strings are allocated on the heap,
807 it is the callers responsibility to free them.
809 Note that it is possible to return zero for the symtab
810 if no file is validly specified. Callers must check that.
811 Also, the line number returned may be invalid. */
813 /* We allow single quotes in various places. This is a hideous
814 kludge, which exists because the completer can't yet deal with the
815 lack of single quotes. FIXME: write a linespec_completer which we
816 can use as appropriate instead of make_symbol_completion_list. */
818 struct symtabs_and_lines
819 decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
820 int default_line, struct linespec_result *canonical)
824 /* If a file name is specified, this is its symtab. */
825 struct symtab *file_symtab = NULL;
828 /* This says whether or not something in *ARGPTR is quoted with
829 completer_quotes (i.e. with single quotes). */
831 /* Is *ARGPTR is enclosed in double quotes? */
832 int is_quote_enclosed;
833 int is_objc_method = 0;
834 char *saved_arg = *argptr;
835 /* If IS_QUOTED, the end of the quoted bit. */
836 char *end_quote = NULL;
837 /* Is *ARGPTR enclosed in single quotes? */
838 int is_squote_enclosed = 0;
839 /* The "first half" of the linespec. */
842 /* If we are parsing `function:label', this holds the symbol for the
844 struct symbol *function_symbol = NULL;
845 /* If FUNCTION_SYMBOL is not NULL, then this is the exception that
846 was thrown when trying to parse a filename. */
847 volatile struct gdb_exception file_exception;
849 /* Defaults have defaults. */
851 initialize_defaults (&default_symtab, &default_line);
853 /* See if arg is *PC. */
856 return decode_indirect (argptr);
858 is_quoted = (strchr (get_gdb_completer_quote_characters (),
863 end_quote = skip_quoted (*argptr);
864 if (*end_quote == '\0')
865 is_squote_enclosed = 1;
868 /* Check to see if it's a multipart linespec (with colons or
871 /* Locate the end of the first half of the linespec.
872 After the call, for instance, if the argptr string is "foo.c:123"
873 p will point at "123". If there is only one part, like "foo", p
874 will point to "". If this is a C++ name, like "A::B::foo", p will
875 point to "::B::foo". Argptr is not changed by this call. */
877 first_half = p = locate_first_half (argptr, &is_quote_enclosed);
879 /* First things first: if ARGPTR starts with a filename, get its
880 symtab and strip the filename from ARGPTR. */
881 TRY_CATCH (file_exception, RETURN_MASK_ERROR)
883 file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed);
886 if (file_exception.reason >= 0)
888 /* Check for single quotes on the non-filename part. */
889 is_quoted = (**argptr
890 && strchr (get_gdb_completer_quote_characters (),
893 end_quote = skip_quoted (*argptr);
895 /* Locate the next "half" of the linespec. */
896 first_half = p = locate_first_half (argptr, &is_quote_enclosed);
899 /* Check if this is an Objective-C method (anything that starts with
900 a '+' or '-' and a '['). */
901 if (is_objc_method_format (p))
904 /* Check if the symbol could be an Objective-C selector. */
907 struct symtabs_and_lines values;
909 values = decode_objc (argptr, funfirstline, file_symtab,
910 canonical, saved_arg);
911 if (values.sals != NULL)
915 /* Does it look like there actually were two parts? */
917 if (p[0] == ':' || p[0] == '.')
919 /* Is it a C++ or Java compound data structure?
920 The check on p[1] == ':' is capturing the case of "::",
921 since p[0]==':' was checked above.
922 Note that the call to decode_compound does everything
923 for us, including the lookup on the symbol table, so we
926 if (p[0] == '.' || p[1] == ':')
928 struct symtabs_and_lines values;
929 volatile struct gdb_exception ex;
930 char *saved_argptr = *argptr;
932 if (is_quote_enclosed)
935 TRY_CATCH (ex, RETURN_MASK_ERROR)
937 values = decode_compound (argptr, funfirstline, canonical,
938 file_symtab, saved_arg, p);
940 if ((is_quoted || is_squote_enclosed) && **argptr == '\'')
941 *argptr = *argptr + 1;
946 if (ex.error != NOT_FOUND_ERROR)
947 throw_exception (ex);
949 *argptr = saved_argptr;
953 /* If there was an exception looking up a specified filename earlier,
954 then check whether we were really given `function:label'. */
955 if (file_exception.reason < 0)
957 function_symbol = find_function_symbol (argptr, p,
959 /* If we did not find a function, re-throw the original
961 if (!function_symbol)
962 throw_exception (file_exception);
965 /* Check for single quotes on the non-filename part. */
968 is_quoted = (**argptr
969 && strchr (get_gdb_completer_quote_characters (),
972 end_quote = skip_quoted (*argptr);
977 /* file_symtab is specified file's symtab, or 0 if no file specified.
978 If we are parsing `function:symbol', then FUNCTION_SYMBOL is the
979 function before the `:'.
980 arg no longer contains the file name. */
982 /* If the filename was quoted, we must re-check the quotation. */
984 if (end_quote == first_half && *end_quote!= '\0')
986 is_quoted = (**argptr
987 && strchr (get_gdb_completer_quote_characters (),
990 end_quote = skip_quoted (*argptr);
993 /* Check whether arg is all digits (and sign). */
996 if (*q == '-' || *q == '+')
998 while (*q >= '0' && *q <= '9')
1001 if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')
1002 && function_symbol == NULL)
1003 /* We found a token consisting of all digits -- at least one digit. */
1004 return decode_all_digits (argptr, default_symtab, default_line,
1005 canonical, file_symtab, q);
1007 /* Arg token is not digits => try it as a variable name
1008 Find the next token (everything up to end or next whitespace). */
1010 if (**argptr == '$') /* May be a convenience variable. */
1011 /* One or two $ chars possible. */
1012 p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1));
1013 else if (is_quoted || is_squote_enclosed)
1017 error (_("Unmatched single quote."));
1019 else if (is_objc_method)
1021 /* allow word separators in method names for Obj-C. */
1022 p = skip_quoted_chars (*argptr, NULL, "");
1026 p = skip_quoted (*argptr);
1029 /* Keep any important naming information. */
1030 p = keep_name_info (p, p == saved_arg || is_linespec_boundary (p[-1]));
1032 copy = (char *) alloca (p - *argptr + 1);
1033 memcpy (copy, *argptr, p - *argptr);
1034 copy[p - *argptr] = '\0';
1037 && copy[0] == copy[p - *argptr - 1]
1038 && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
1040 copy[p - *argptr - 1] = '\0';
1043 else if (is_quoted || is_squote_enclosed)
1044 copy[p - *argptr - 1] = '\0';
1045 while (*p == ' ' || *p == '\t')
1049 /* If it starts with $: may be a legitimate variable or routine name
1050 (e.g. HP-UX millicode routines such as $$dyncall), or it may
1051 be history value, or it may be a convenience variable. */
1053 if (*copy == '$' && function_symbol == NULL)
1054 return decode_dollar (copy, funfirstline, default_symtab,
1055 canonical, file_symtab);
1057 /* Try the token as a label, but only if no file was specified,
1058 because we can only really find labels in the current scope. */
1062 struct symtabs_and_lines label_result;
1063 if (decode_label (function_symbol, copy, canonical, &label_result))
1064 return label_result;
1067 if (function_symbol)
1068 throw_exception (file_exception);
1070 /* Look up that token as a variable.
1071 If file specified, use that file's per-file block to start with. */
1073 return decode_variable (copy, funfirstline, canonical, file_symtab);
1078 /* Now, more helper functions for decode_line_1. Some conventions
1079 that these functions follow:
1081 Decode_line_1 typically passes along some of its arguments or local
1082 variables to the subfunctions. It passes the variables by
1083 reference if they are modified by the subfunction, and by value
1086 Some of the functions have side effects that don't arise from
1087 variables that are passed by reference. In particular, if a
1088 function is passed ARGPTR as an argument, it modifies what ARGPTR
1089 points to; typically, it advances *ARGPTR past whatever substring
1090 it has just looked at. (If it doesn't modify *ARGPTR, then the
1091 function gets passed *ARGPTR instead, which is then called ARG.)
1092 Also, functions that return a struct symtabs_and_lines may modify
1093 CANONICAL, as in the description of decode_line_1.
1095 If a function returns a struct symtabs_and_lines, then that struct
1096 will immediately make its way up the call chain to be returned by
1097 decode_line_1. In particular, all of the functions decode_XXX
1098 calculate the appropriate struct symtabs_and_lines, under the
1099 assumption that their argument is of the form XXX. */
1101 /* First, some functions to initialize stuff at the beggining of the
1105 initialize_defaults (struct symtab **default_symtab, int *default_line)
1107 if (*default_symtab == 0)
1109 /* Use whatever we have for the default source line. We don't use
1110 get_current_or_default_symtab_and_line as it can recurse and call
1112 struct symtab_and_line cursal =
1113 get_current_source_symtab_and_line ();
1115 *default_symtab = cursal.symtab;
1116 *default_line = cursal.line;
1122 /* Decode arg of the form *PC. */
1124 static struct symtabs_and_lines
1125 decode_indirect (char **argptr)
1127 struct symtabs_and_lines values;
1131 pc = value_as_address (parse_to_comma_and_eval (argptr));
1133 values.sals = (struct symtab_and_line *)
1134 xmalloc (sizeof (struct symtab_and_line));
1137 values.sals[0] = find_pc_line (pc, 0);
1138 values.sals[0].pc = pc;
1139 values.sals[0].section = find_pc_overlay (pc);
1140 values.sals[0].explicit_pc = 1;
1147 /* Locate the first half of the linespec, ending in a colon, period,
1148 or whitespace. (More or less.) Also, check to see if *ARGPTR is
1149 enclosed in double quotes; if so, set is_quote_enclosed, advance
1150 ARGPTR past that and zero out the trailing double quote.
1151 If ARGPTR is just a simple name like "main", p will point to ""
1155 locate_first_half (char **argptr, int *is_quote_enclosed)
1161 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1162 and we must isolate the first half. Outer layers will call again later
1163 for the second half.
1165 Don't count commas that appear in argument lists of overloaded
1166 functions, or in quoted strings. It's stupid to go to this much
1167 trouble when the rest of the function is such an obvious roach hotel. */
1168 ii = find_toplevel_char (*argptr, ',');
1169 has_comma = (ii != 0);
1171 /* Temporarily zap out second half to not confuse the code below.
1172 This is undone below. Do not change ii!! */
1178 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1179 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1185 *is_quote_enclosed = 1;
1191 *is_quote_enclosed = 0;
1192 if (strchr (get_gdb_completer_quote_characters (), *p))
1202 char *temp_end = find_template_name_end (p);
1205 error (_("malformed template specification in command"));
1210 p = find_method_overload_end (p);
1212 /* Check for a colon and a plus or minus and a [ (which
1213 indicates an Objective-C method). */
1214 if (is_objc_method_format (p))
1218 /* Check for the end of the first half of the linespec. End of
1219 line, a tab, a colon or a space. But if enclosed in double
1220 quotes we do not break on enclosed spaces. */
1224 || ((p[0] == ' ') && !*is_quote_enclosed))
1226 if (p[0] == '.' && strchr (p, ':') == NULL)
1228 /* Java qualified method. Find the *last* '.', since the
1229 others are package qualifiers. Stop at any open parenthesis
1230 which might provide overload information. */
1231 for (p1 = p; *p1 && *p1 != '('; p1++)
1239 while (p[0] == ' ' || p[0] == '\t')
1242 /* If the closing double quote was left at the end, remove it. */
1243 if (*is_quote_enclosed)
1245 char *closing_quote = strchr (p - 1, '"');
1247 if (closing_quote && closing_quote[1] == '\0')
1248 *closing_quote = '\0';
1251 /* Now that we've safely parsed the first half, put back ',' so
1252 outer layers can see it. */
1261 /* Here's where we recognise an Objective-C Selector. An Objective C
1262 selector may be implemented by more than one class, therefore it
1263 may represent more than one method/function. This gives us a
1264 situation somewhat analogous to C++ overloading. If there's more
1265 than one method that could represent the selector, then use some of
1266 the existing C++ code to let the user choose one. */
1268 struct symtabs_and_lines
1269 decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab,
1270 struct linespec_result *canonical, char *saved_arg)
1272 struct symtabs_and_lines values;
1273 struct symbol **sym_arr = NULL;
1274 struct symbol *sym = NULL;
1275 struct block *block = NULL;
1282 find_imps (file_symtab, get_search_block (file_symtab), *argptr,
1287 sym_arr = (struct symbol **)
1288 alloca ((i1 + 1) * sizeof (struct symbol *));
1291 *argptr = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2);
1294 /* i1 now represents the TOTAL number of matches found.
1295 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1296 which will come first in the sym_arr array. Any low-level
1297 (minimal_symbol) matches will follow those. */
1303 /* Already a struct symbol. */
1308 sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0]));
1309 if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]),
1310 SYMBOL_LINKAGE_NAME (sym)) != 0)
1312 warning (_("debugging symbol \"%s\" does "
1313 "not match selector; ignoring"),
1314 SYMBOL_LINKAGE_NAME (sym));
1319 values.sals = (struct symtab_and_line *)
1320 xmalloc (sizeof (struct symtab_and_line));
1323 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1325 /* Canonicalize this, so it remains resolved for dylib loads. */
1326 values.sals[0] = find_function_start_sal (sym, funfirstline);
1327 build_canonical_line_spec (values.sals,
1328 SYMBOL_NATURAL_NAME (sym), canonical);
1332 /* The only match was a non-debuggable symbol, which might point
1333 to a function descriptor; resolve it to the actual code address
1335 struct minimal_symbol *msymbol = (struct minimal_symbol *)sym_arr[0];
1336 struct objfile *objfile = msymbol_objfile (msymbol);
1337 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1338 CORE_ADDR pc = SYMBOL_VALUE_ADDRESS (msymbol);
1340 pc = gdbarch_convert_from_func_ptr_addr (gdbarch, pc,
1343 init_sal (&values.sals[0]);
1344 values.sals[0].pc = pc;
1351 /* More than one match. The user must choose one or more. */
1352 return decode_line_2 (sym_arr, i2, funfirstline, canonical);
1358 /* This handles C++ and Java compound data structures. P should point
1359 at the first component separator, i.e. double-colon or period. As
1360 an example, on entrance to this function we could have ARGPTR
1361 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1363 static struct symtabs_and_lines
1364 decode_compound (char **argptr, int funfirstline,
1365 struct linespec_result *canonical, struct symtab *file_symtab,
1366 char *the_real_saved_arg, char *p)
1368 struct symtabs_and_lines values;
1370 char *saved_arg2 = *argptr;
1374 struct symbol *sym_class;
1378 /* If the user specified any completer quote characters in the input,
1379 strip them. They are superfluous. */
1380 saved_arg = alloca (strlen (the_real_saved_arg) + 1);
1382 char *dst = saved_arg;
1383 char *src = the_real_saved_arg;
1384 char *quotes = get_gdb_completer_quote_characters ();
1385 while (*src != '\0')
1387 if (strchr (quotes, *src) == NULL)
1394 /* First check for "global" namespace specification, of the form
1395 "::foo". If found, skip over the colons and jump to normal
1396 symbol processing. I.e. the whole line specification starts with
1397 "::" (note the condition that *argptr == p). */
1399 && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
1402 /* Given our example "AAA::inA::fun", we have two cases to consider:
1404 1) AAA::inA is the name of a class. In that case, presumably it
1405 has a method called "fun"; we then look up that method using
1408 2) AAA::inA isn't the name of a class. In that case, either the
1409 user made a typo, AAA::inA is the name of a namespace, or it is
1410 the name of a minimal symbol.
1411 We just look up AAA::inA::fun with lookup_symbol. If that fails,
1412 try lookup_minimal_symbol.
1414 Thus, our first task is to find everything before the last set of
1415 double-colons and figure out if it's the name of a class. So we
1416 first loop through all of the double-colons. */
1418 p2 = p; /* Save for restart. */
1420 /* This is very messy. Following the example above we have now the
1423 argptr -> "AAA::inA::fun
1424 saved_arg -> "AAA::inA::fun
1425 saved_arg2 -> "AAA::inA::fun
1426 p2 -> "::inA::fun". */
1428 /* In the loop below, with these strings, we'll make 2 passes, each
1429 is marked in comments. */
1433 static char *break_characters = " \t(";
1435 /* Move pointer up to next possible class/namespace token. */
1437 p = p2 + 1; /* Restart with old value +1. */
1439 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1440 i.e. if there is a double-colon, p will now point to the
1442 /* PASS2: p2->"::fun", p->":fun" */
1444 /* Move pointer ahead to next double-colon. */
1446 && strchr (break_characters, *p) == NULL
1447 && strchr (get_gdb_completer_quote_characters (), *p) == NULL)
1449 if (current_language->la_language == language_cplus)
1450 p += cp_validate_operator (p);
1454 temp_end = find_template_name_end (p);
1456 error (_("malformed template specification in command"));
1459 /* Note that, since, at the start of this loop, p would be
1460 pointing to the second colon in a double-colon, we only
1461 satisfy the condition below if there is another
1462 double-colon to the right (after). I.e. there is another
1463 component that can be a class or a namespace. I.e, if at
1464 the beginning of this loop (PASS1), we had
1465 p->":inA::fun", we'll trigger this when p has been
1466 advanced to point to "::fun". */
1467 /* PASS2: we will not trigger this. */
1468 else if ((p[0] == ':') && (p[1] == ':'))
1469 break; /* Found double-colon. */
1472 /* PASS2: We'll keep getting here, until P points to one of the
1473 break characters, at which point we exit this loop. */
1477 && strncmp (&p[1], CP_ANONYMOUS_NAMESPACE_STR,
1478 CP_ANONYMOUS_NAMESPACE_LEN) == 0)
1479 p += CP_ANONYMOUS_NAMESPACE_LEN;
1480 else if (strchr (break_characters, *p) == NULL)
1487 break; /* Out of the while (1). This would happen
1488 for instance if we have looked up
1489 unsuccessfully all the components of the
1490 string, and p->""(PASS2). */
1492 /* We get here if p points to one of the break characters or "" (i.e.,
1494 /* Save restart for next time around. */
1496 /* Restore argptr as it was on entry to this function. */
1497 *argptr = saved_arg2;
1498 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1501 /* All ready for next pass through the loop. */
1505 /* Start of lookup in the symbol tables. */
1507 /* Lookup in the symbol table the substring between argptr and
1508 p. Note, this call changes the value of argptr. */
1509 /* Before the call, argptr->"AAA::inA::fun",
1510 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1512 sym_class = lookup_prefix_sym (argptr, p2, file_symtab);
1514 /* If sym_class has been found, and if "AAA::inA" is a class, then
1515 we're in case 1 above. So we look up "fun" as a method of that
1518 (t = check_typedef (SYMBOL_TYPE (sym_class)),
1519 (TYPE_CODE (t) == TYPE_CODE_STRUCT
1520 || TYPE_CODE (t) == TYPE_CODE_UNION)))
1522 /* Arg token is not digits => try it as a function name.
1523 Find the next token (everything up to end or next
1526 && strchr (get_gdb_completer_quote_characters (),
1529 p = skip_quoted (*argptr);
1530 *argptr = *argptr + 1;
1534 /* At this point argptr->"fun". */
1538 while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':'
1541 /* At this point p->"". String ended. */
1542 /* Nope, C++ operators could have spaces in them
1543 ("foo::operator <" or "foo::operator delete []").
1544 I apologize, this is a bit hacky... */
1545 if (current_language->la_language == language_cplus
1546 && *p == ' ' && p - 8 - *argptr + 1 > 0)
1548 /* The above loop has already swallowed "operator". */
1549 p += cp_validate_operator (p - 8) - 8;
1552 /* Keep any important naming information. */
1553 p = keep_name_info (p, 1);
1556 /* Allocate our own copy of the substring between argptr and
1558 copy = (char *) alloca (p - *argptr + 1);
1559 memcpy (copy, *argptr, p - *argptr);
1560 copy[p - *argptr] = '\0';
1562 && copy[p - *argptr - 1]
1563 && strchr (get_gdb_completer_quote_characters (),
1564 copy[p - *argptr - 1]) != NULL)
1565 copy[p - *argptr - 1] = '\0';
1567 /* At this point copy->"fun", p->"". */
1569 /* No line number may be specified. */
1570 while (*p == ' ' || *p == '\t')
1573 /* At this point arptr->"". */
1575 /* Look for copy as a method of sym_class. */
1576 /* At this point copy->"fun", sym_class is "AAA:inA",
1577 saved_arg->"AAA::inA::fun". This concludes the scanning of
1578 the string for possible components matches. If we find it
1579 here, we return. If not, and we are at the and of the string,
1580 we'll lookup the whole string in the symbol tables. */
1582 return find_method (funfirstline, canonical, saved_arg, copy, t,
1583 sym_class, file_symtab);
1584 } /* End if symbol found. */
1587 /* We couldn't find a class, so we're in case 2 above. We check the
1588 entire name as a symbol instead. */
1590 p = keep_name_info (p, 1);
1592 copy = (char *) alloca (p - saved_arg2 + 1);
1593 memcpy (copy, saved_arg2, p - saved_arg2);
1594 /* Note: if is_quoted should be true, we snuff out quote here
1596 copy[p - saved_arg2] = '\000';
1597 /* Set argptr to skip over the name. */
1598 *argptr = (*p == '\'') ? p + 1 : p;
1600 /* Look up entire name. */
1601 sym = lookup_symbol (copy, get_selected_block (0), VAR_DOMAIN, 0);
1603 return symbol_found (funfirstline, canonical, copy, sym, NULL, NULL);
1606 struct minimal_symbol *msym;
1608 /* Couldn't find any interpretation as classes/namespaces. As a last
1609 resort, try the minimal symbol tables. */
1610 msym = lookup_minimal_symbol (copy, NULL, NULL);
1612 return minsym_found (funfirstline, msym);
1615 /* Couldn't find a minimal symbol, either, so give up. */
1616 cplusplus_error (the_real_saved_arg,
1617 "Can't find member of namespace, "
1618 "class, struct, or union named \"%s\"\n",
1622 /* Next come some helper functions for decode_compound. */
1624 /* Return the symbol corresponding to the substring of *ARGPTR ending
1625 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1626 name in question, the compound object separator ("::" or "."), and
1627 whitespace. Note that *ARGPTR is changed whether or not the
1628 lookup_symbol call finds anything (i.e we return NULL). As an
1629 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1631 static struct symbol *
1632 lookup_prefix_sym (char **argptr, char *p, struct symtab *file_symtab)
1638 /* Extract the class name. */
1640 while (p != *argptr && p[-1] == ' ')
1642 copy = (char *) alloca (p - *argptr + 1);
1643 memcpy (copy, *argptr, p - *argptr);
1644 copy[p - *argptr] = 0;
1646 /* Discard the class name from the argptr. */
1647 p = p1 + (p1[0] == ':' ? 2 : 1);
1648 while (*p == ' ' || *p == '\t')
1652 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1653 argptr->"inA::fun". */
1655 sym = lookup_symbol (copy, get_search_block (file_symtab), STRUCT_DOMAIN, 0);
1658 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1659 fail when the user attempts to lookup a method of a class
1660 via a typedef'd name (NOT via the class's name, which is already
1661 handled in symbol_matches_domain). So try the lookup again
1662 using VAR_DOMAIN (where typedefs live) and double-check that we
1663 found a struct/class type. */
1664 struct symbol *s = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
1668 struct type *t = SYMBOL_TYPE (s);
1671 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
1679 /* This finds the method COPY in the class whose type is T and whose
1680 symbol is SYM_CLASS. */
1682 static struct symtabs_and_lines
1683 find_method (int funfirstline, struct linespec_result *canonical,
1685 char *copy, struct type *t, struct symbol *sym_class,
1686 struct symtab *file_symtab)
1688 struct symtabs_and_lines values;
1689 struct symbol *sym = NULL;
1690 int i1; /* Counter for the symbol array. */
1691 struct symbol **sym_arr = alloca (total_number_of_methods (t)
1692 * sizeof (struct symbol *));
1694 /* Find all methods with a matching name, and put them in
1697 i1 = find_methods (t, copy, SYMBOL_LANGUAGE (sym_class), sym_arr,
1700 /* If we were given a specific overload instance in COPY, defer the field
1701 acceptance till the strcmp_iw verification below, even if we found just
1702 a single field with that name. */
1703 if (i1 == 1 && strchr (copy, '(') == NULL)
1705 /* There is exactly one field with that name. */
1708 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1710 values.sals = (struct symtab_and_line *)
1711 xmalloc (sizeof (struct symtab_and_line));
1713 values.sals[0] = find_function_start_sal (sym,
1725 /* If we were given a specific overload instance, use that
1726 (or error if no matches were found). Otherwise ask the user
1727 which one to use. */
1728 if (strchr (copy, '('))
1733 struct cleanup *cleanup;
1735 /* Construct the proper search name based on SYM_CLASS and COPY.
1736 SAVED_ARG may contain a valid name, but that name might not be
1737 what is actually stored in the symbol table. For example,
1738 if SAVED_ARG (and SYM_CLASS) were found via an import
1739 ("using namespace" in C++), then the physname of
1740 SYM_CLASS ("A::myclass") may not be the same as SAVED_ARG
1742 name = xmalloc (strlen (SYMBOL_NATURAL_NAME (sym_class))
1743 + 2 /* "::" */ + strlen (copy) + 1);
1744 strcpy (name, SYMBOL_NATURAL_NAME (sym_class));
1745 strcat (name, "::");
1746 strcat (name, copy);
1747 canon = cp_canonicalize_string (name);
1753 cleanup = make_cleanup (xfree, name);
1755 for (i = 0; i < i1; ++i)
1757 if (strcmp_iw (name, SYMBOL_LINKAGE_NAME (sym_arr[i])) == 0)
1759 values.sals = (struct symtab_and_line *)
1760 xmalloc (sizeof (struct symtab_and_line));
1762 values.sals[0] = find_function_start_sal (sym_arr[i],
1764 do_cleanups (cleanup);
1769 cplusplus_error (saved_arg, _("the class `%s' does not have "
1770 "any method instance named %s"),
1771 SYMBOL_PRINT_NAME (sym_class), copy);
1774 return decode_line_2 (sym_arr, i1, funfirstline, canonical);
1779 cplusplus_error (saved_arg,
1780 "the class `%s' does not have destructor defined\n",
1781 SYMBOL_PRINT_NAME (sym_class));
1783 cplusplus_error (saved_arg,
1784 "the class %s does not have any method named %s\n",
1785 SYMBOL_PRINT_NAME (sym_class), copy);
1791 /* Return the symtab associated to the filename given by the substring
1792 of *ARGPTR ending at P, and advance ARGPTR past that filename. */
1794 static struct symtab *
1795 symtab_from_filename (char **argptr, char *p, int is_quote_enclosed)
1799 struct symtab *file_symtab;
1802 while (p != *argptr && p[-1] == ' ')
1804 if ((*p == '"') && is_quote_enclosed)
1806 copy = (char *) alloca (p - *argptr + 1);
1807 memcpy (copy, *argptr, p - *argptr);
1808 /* It may have the ending quote right after the file name. */
1809 if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
1810 || copy[p - *argptr - 1] == '\'')
1811 copy[p - *argptr - 1] = 0;
1813 copy[p - *argptr] = 0;
1815 /* Find that file's data. */
1816 file_symtab = lookup_symtab (copy);
1817 if (file_symtab == 0)
1819 if (!have_full_symbols () && !have_partial_symbols ())
1820 throw_error (NOT_FOUND_ERROR,
1821 _("No symbol table is loaded. "
1822 "Use the \"file\" command."));
1823 throw_error (NOT_FOUND_ERROR, _("No source file named %s."), copy);
1826 /* Discard the file name from the arg. */
1828 while (*p == ' ' || *p == '\t')
1835 /* Look up a function symbol in *ARGPTR. If found, advance *ARGPTR
1836 and return the symbol. If not found, return NULL. */
1838 static struct symbol *
1839 find_function_symbol (char **argptr, char *p, int is_quote_enclosed)
1843 struct symbol *function_symbol;
1846 while (p != *argptr && p[-1] == ' ')
1848 if ((*p == '"') && is_quote_enclosed)
1850 copy = (char *) alloca (p - *argptr + 1);
1851 memcpy (copy, *argptr, p - *argptr);
1852 /* It may have the ending quote right after the file name. */
1853 if ((is_quote_enclosed && copy[p - *argptr - 1] == '"')
1854 || copy[p - *argptr - 1] == '\'')
1855 copy[p - *argptr - 1] = 0;
1857 copy[p - *argptr] = 0;
1859 function_symbol = lookup_symbol (copy, get_selected_block (0),
1861 if (!function_symbol || SYMBOL_CLASS (function_symbol) != LOC_BLOCK)
1864 /* Discard the file name from the arg. */
1866 while (*p == ' ' || *p == '\t')
1870 return function_symbol;
1875 /* This decodes a line where the argument is all digits (possibly
1876 preceded by a sign). Q should point to the end of those digits;
1877 the other arguments are as usual. */
1879 static struct symtabs_and_lines
1880 decode_all_digits (char **argptr, struct symtab *default_symtab,
1881 int default_line, struct linespec_result *canonical,
1882 struct symtab *file_symtab, char *q)
1885 struct symtabs_and_lines values;
1886 struct symtab_and_line val;
1894 /* We might need a canonical line spec if no file was specified. */
1895 int need_canonical = (file_symtab == NULL) ? 1 : 0;
1899 val.pspace = current_program_space;
1901 /* This is where we need to make sure that we have good defaults.
1902 We must guarantee that this section of code is never executed
1903 when we are called with just a function name, since
1904 set_default_source_symtab_and_line uses
1905 select_source_symtab that calls us with such an argument. */
1907 if (file_symtab == 0 && default_symtab == 0)
1909 /* Make sure we have at least a default source file. */
1910 set_default_source_symtab_and_line ();
1911 initialize_defaults (&default_symtab, &default_line);
1914 if (**argptr == '+')
1915 sign = plus, (*argptr)++;
1916 else if (**argptr == '-')
1917 sign = minus, (*argptr)++;
1918 val.line = atoi (*argptr);
1924 if (file_symtab == 0)
1925 val.line = default_line + val.line;
1930 if (file_symtab == 0)
1931 val.line = default_line - val.line;
1936 break; /* No need to adjust val.line. */
1939 while (*q == ' ' || *q == '\t')
1942 if (file_symtab == 0)
1943 file_symtab = default_symtab;
1945 /* It is possible that this source file has more than one symtab,
1946 and that the new line number specification has moved us from the
1947 default (in file_symtab) to a new one. */
1948 val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL);
1949 if (val.symtab == 0)
1950 val.symtab = file_symtab;
1952 val.pspace = SYMTAB_PSPACE (val.symtab);
1954 values.sals = (struct symtab_and_line *)
1955 xmalloc (sizeof (struct symtab_and_line));
1956 values.sals[0] = val;
1959 build_canonical_line_spec (values.sals, NULL, canonical);
1960 values.sals[0].explicit_line = 1;
1966 /* Decode a linespec starting with a dollar sign. */
1968 static struct symtabs_and_lines
1969 decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
1970 struct linespec_result *canonical, struct symtab *file_symtab)
1974 int need_canonical = 0;
1975 struct symtabs_and_lines values;
1976 struct symtab_and_line val;
1979 struct minimal_symbol *msymbol;
1981 p = (copy[1] == '$') ? copy + 2 : copy + 1;
1982 while (*p >= '0' && *p <= '9')
1984 if (!*p) /* Reached end of token without hitting non-digit. */
1986 /* We have a value history reference. */
1987 struct value *val_history;
1989 sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
1990 val_history = access_value_history ((copy[1] == '$') ? -index : index);
1991 if (TYPE_CODE (value_type (val_history)) != TYPE_CODE_INT)
1992 error (_("History values used in line "
1993 "specs must have integer values."));
1994 valx = value_as_long (val_history);
1998 /* Not all digits -- may be user variable/function or a
1999 convenience variable. */
2001 /* Look up entire name as a symbol first. */
2002 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0);
2003 file_symtab = (struct symtab *) NULL;
2005 /* Symbol was found --> jump to normal symbol processing. */
2007 return symbol_found (funfirstline, canonical, copy, sym, NULL, NULL);
2009 /* If symbol was not found, look in minimal symbol tables. */
2010 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
2011 /* Min symbol was found --> jump to minsym processing. */
2013 return minsym_found (funfirstline, msymbol);
2015 /* Not a user variable or function -- must be convenience variable. */
2016 if (!get_internalvar_integer (lookup_internalvar (copy + 1), &valx))
2017 error (_("Convenience variables used in line "
2018 "specs must have integer values."));
2023 /* Either history value or convenience value from above, in valx. */
2024 val.symtab = file_symtab ? file_symtab : default_symtab;
2027 val.pspace = current_program_space;
2029 values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
2030 values.sals[0] = val;
2034 build_canonical_line_spec (values.sals, NULL, canonical);
2041 /* A helper for decode_line_1 that tries to find a label. The label
2042 is searched for in the current block.
2043 FUNCTION_SYMBOL is the enclosing function; or NULL if none
2045 COPY is the name of the label to find.
2046 CANONICAL is the same as the "canonical" argument to decode_line_1.
2047 RESULT is a pointer to a symtabs_and_lines structure which will be
2048 filled in on success.
2049 This function returns 1 if a label was found, 0 otherwise. */
2052 decode_label (struct symbol *function_symbol, char *copy,
2053 struct linespec_result *canonical,
2054 struct symtabs_and_lines *result)
2057 struct block *block;
2059 if (function_symbol)
2060 block = SYMBOL_BLOCK_VALUE (function_symbol);
2063 block = get_selected_block (0);
2065 block && !BLOCK_FUNCTION (block);
2066 block = BLOCK_SUPERBLOCK (block))
2070 function_symbol = BLOCK_FUNCTION (block);
2073 sym = lookup_symbol (copy, block, LABEL_DOMAIN, 0);
2076 *result = symbol_found (0, canonical, copy, sym, NULL, function_symbol);
2081 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
2082 look in that symtab's static variables first. */
2084 static struct symtabs_and_lines
2085 decode_variable (char *copy, int funfirstline,
2086 struct linespec_result *canonical,
2087 struct symtab *file_symtab)
2090 struct minimal_symbol *msymbol;
2092 sym = lookup_symbol (copy, get_search_block (file_symtab),
2096 return symbol_found (funfirstline, canonical, copy, sym, file_symtab, NULL);
2098 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
2100 if (msymbol != NULL)
2101 return minsym_found (funfirstline, msymbol);
2103 if (!have_full_symbols ()
2104 && !have_partial_symbols ()
2105 && !have_minimal_symbols ())
2106 throw_error (NOT_FOUND_ERROR,
2107 _("No symbol table is loaded. Use the \"file\" command."));
2108 throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy);
2114 /* Now come some functions that are called from multiple places within
2117 /* We've found a symbol SYM to associate with our linespec; build a
2118 corresponding struct symtabs_and_lines. */
2120 static struct symtabs_and_lines
2121 symbol_found (int funfirstline, struct linespec_result *canonical, char *copy,
2122 struct symbol *sym, struct symtab *file_symtab,
2123 struct symbol *function_symbol)
2125 struct symtabs_and_lines values;
2127 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
2129 /* Arg is the name of a function. */
2130 values.sals = (struct symtab_and_line *)
2131 xmalloc (sizeof (struct symtab_and_line));
2132 values.sals[0] = find_function_start_sal (sym, funfirstline);
2135 /* Don't use the SYMBOL_LINE; if used at all it points to
2136 the line containing the parameters or thereabouts, not
2137 the first line of code. */
2139 /* We might need a canonical line spec if it is a static
2141 if (file_symtab == 0)
2143 struct blockvector *bv = BLOCKVECTOR (SYMBOL_SYMTAB (sym));
2144 struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
2146 if (lookup_block_symbol (b, copy, VAR_DOMAIN) != NULL)
2147 build_canonical_line_spec (values.sals, copy, canonical);
2153 if (SYMBOL_CLASS (sym) == LOC_LABEL && SYMBOL_VALUE_ADDRESS (sym) != 0)
2155 /* We know its line number. */
2156 values.sals = (struct symtab_and_line *)
2157 xmalloc (sizeof (struct symtab_and_line));
2159 init_sal (&values.sals[0]);
2160 values.sals[0].symtab = SYMBOL_SYMTAB (sym);
2161 values.sals[0].line = SYMBOL_LINE (sym);
2162 values.sals[0].pc = SYMBOL_VALUE_ADDRESS (sym);
2163 values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
2164 values.sals[0].explicit_pc = 1;
2168 canonical->special_display = 1;
2169 canonical->canonical = xmalloc (sizeof (char *));
2170 canonical->canonical[0]
2171 = xstrprintf ("%s:%s",
2172 SYMBOL_NATURAL_NAME (function_symbol),
2173 SYMBOL_NATURAL_NAME (sym));
2178 else if (funfirstline)
2180 /* NOT_FOUND_ERROR is not correct but it ensures COPY will be
2181 searched also as a minimal symbol. */
2183 throw_error (NOT_FOUND_ERROR, _("\"%s\" is not a function"), copy);
2185 else if (SYMBOL_LINE (sym) != 0)
2187 /* We know its line number. */
2188 values.sals = (struct symtab_and_line *)
2189 xmalloc (sizeof (struct symtab_and_line));
2191 memset (&values.sals[0], 0, sizeof (values.sals[0]));
2192 values.sals[0].symtab = SYMBOL_SYMTAB (sym);
2193 values.sals[0].line = SYMBOL_LINE (sym);
2194 values.sals[0].pspace = SYMTAB_PSPACE (SYMBOL_SYMTAB (sym));
2198 /* This can happen if it is compiled with a compiler which doesn't
2199 put out line numbers for variables. */
2200 /* FIXME: Shouldn't we just set .line and .symtab to zero
2201 and return? For example, "info line foo" could print
2203 error (_("Line number not known for symbol \"%s\""), copy);
2207 /* We've found a minimal symbol MSYMBOL to associate with our
2208 linespec; build a corresponding struct symtabs_and_lines. */
2210 static struct symtabs_and_lines
2211 minsym_found (int funfirstline, struct minimal_symbol *msymbol)
2213 struct objfile *objfile = msymbol_objfile (msymbol);
2214 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2215 struct symtabs_and_lines values;
2218 values.sals = (struct symtab_and_line *)
2219 xmalloc (sizeof (struct symtab_and_line));
2220 values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
2221 (struct obj_section *) 0, 0);
2222 values.sals[0].section = SYMBOL_OBJ_SECTION (msymbol);
2224 /* The minimal symbol might point to a function descriptor;
2225 resolve it to the actual code address instead. */
2226 pc = gdbarch_convert_from_func_ptr_addr (gdbarch,
2229 if (pc != values.sals[0].pc)
2230 values.sals[0] = find_pc_sect_line (pc, NULL, 0);
2233 skip_prologue_sal (&values.sals[0]);
2240 init_linespec_result (struct linespec_result *lr)
2242 memset (lr, 0, sizeof (*lr));