1 /* Parser for linespec for the GNU debugger, GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
32 #include "completer.h"
34 #include "parser-defs.h"
36 #include "objc-lang.h"
38 /* We share this one with symtab.c, but it is not exported widely. */
40 extern char *operator_chars (char *, char **);
42 /* Prototypes for local functions */
44 static void initialize_defaults (struct symtab **default_symtab,
47 static void set_flags (char *arg, int *is_quoted, char **paren_pointer);
49 static struct symtabs_and_lines decode_indirect (char **argptr);
51 static char *locate_first_half (char **argptr, int *is_quote_enclosed);
53 static struct symtabs_and_lines decode_objc (char **argptr,
55 struct symtab *file_symtab,
59 static struct symtabs_and_lines decode_compound (char **argptr,
65 static struct symbol *lookup_prefix_sym (char **argptr, char *p);
67 static struct symtabs_and_lines find_method (int funfirstline,
72 struct symbol *sym_class);
74 static int collect_methods (char *copy, struct type *t,
75 struct symbol **sym_arr);
77 static NORETURN void cplusplus_error (const char *name,
79 ATTR_NORETURN ATTR_FORMAT (printf, 2, 3);
81 static int total_number_of_methods (struct type *type);
83 static int find_methods (struct type *, char *, struct symbol **);
85 static void build_canonical_line_spec (struct symtab_and_line *,
88 static char *find_toplevel_char (char *s, char c);
90 static struct symtabs_and_lines decode_line_2 (struct symbol *[],
93 static struct symtab *symtab_from_filename (char **argptr,
94 char *p, int is_quote_enclosed);
97 symtabs_and_lines decode_all_digits (char **argptr,
98 struct symtab *default_symtab,
101 struct symtab *file_symtab,
104 static struct symtabs_and_lines decode_dollar (char *copy,
106 struct symtab *default_symtab,
108 struct symtab *file_symtab);
110 static struct symtabs_and_lines decode_variable (char *copy,
113 struct symtab *file_symtab);
116 symtabs_and_lines symbol_found (int funfirstline,
120 struct symtab *file_symtab,
121 struct symtab *sym_symtab);
124 symtabs_and_lines minsym_found (int funfirstline,
125 struct minimal_symbol *msymbol);
127 /* Helper functions. */
129 /* Issue a helpful hint on using the command completion feature on
130 single quoted demangled C++ symbols as part of the completion
134 cplusplus_error (const char *name, const char *fmt, ...)
136 struct ui_file *tmp_stream;
137 tmp_stream = mem_fileopen ();
138 make_cleanup_ui_file_delete (tmp_stream);
142 va_start (args, fmt);
143 vfprintf_unfiltered (tmp_stream, fmt, args);
147 while (*name == '\'')
149 fprintf_unfiltered (tmp_stream,
150 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
151 "(Note leading single quote.)"),
153 error_stream (tmp_stream);
156 /* Return the number of methods described for TYPE, including the
157 methods from types it derives from. This can't be done in the symbol
158 reader because the type of the baseclass might still be stubbed
159 when the definition of the derived class is parsed. */
162 total_number_of_methods (struct type *type)
167 CHECK_TYPEDEF (type);
168 if (TYPE_CPLUS_SPECIFIC (type) == NULL)
170 count = TYPE_NFN_FIELDS_TOTAL (type);
172 for (n = 0; n < TYPE_N_BASECLASSES (type); n++)
173 count += total_number_of_methods (TYPE_BASECLASS (type, n));
178 /* Recursive helper function for decode_line_1.
179 Look for methods named NAME in type T.
180 Return number of matches.
181 Put matches in SYM_ARR, which should have been allocated with
182 a size of total_number_of_methods (T) * sizeof (struct symbol *).
183 Note that this function is g++ specific. */
186 find_methods (struct type *t, char *name, struct symbol **sym_arr)
190 char *class_name = type_name_no_tag (t);
192 /* Ignore this class if it doesn't have a name. This is ugly, but
193 unless we figure out how to get the physname without the name of
194 the class, then the loop can't do any good. */
196 && (lookup_symbol (class_name, (struct block *) NULL,
197 STRUCT_DOMAIN, (int *) NULL,
198 (struct symtab **) NULL)))
201 int name_len = strlen (name);
205 /* Loop over each method name. At this level, all overloads of a name
206 are counted as a single name. There is an inner loop which loops over
209 for (method_counter = TYPE_NFN_FIELDS (t) - 1;
214 char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
217 if (strncmp (method_name, "__", 2) == 0 ||
218 strncmp (method_name, "op", 2) == 0 ||
219 strncmp (method_name, "type", 4) == 0)
221 if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI))
222 method_name = dem_opname;
223 else if (cplus_demangle_opname (method_name, dem_opname, 0))
224 method_name = dem_opname;
227 if (strcmp_iw (name, method_name) == 0)
228 /* Find all the overloaded methods with that name. */
229 for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
236 f = TYPE_FN_FIELDLIST1 (t, method_counter);
238 if (TYPE_FN_FIELD_STUB (f, field_counter))
242 tmp_name = gdb_mangle_name (t,
245 phys_name = alloca (strlen (tmp_name) + 1);
246 strcpy (phys_name, tmp_name);
250 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
252 /* Destructor is handled by caller, don't add it to
254 if (is_destructor_name (phys_name) != 0)
257 sym_arr[i1] = lookup_symbol (phys_name,
260 (struct symtab **) NULL);
265 /* This error message gets printed, but the method
266 still seems to be found
267 fputs_filtered("(Cannot find method ", gdb_stdout);
268 fprintf_symbol_filtered (gdb_stdout, phys_name,
270 DMGL_PARAMS | DMGL_ANSI);
271 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
275 else if (strncmp (class_name, name, name_len) == 0
276 && (class_name[name_len] == '\0'
277 || class_name[name_len] == '<'))
279 /* For GCC 3.x and stabs, constructors and destructors
280 have names like __base_ctor and __complete_dtor.
281 Check the physname for now if we're looking for a
284 = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
291 f = TYPE_FN_FIELDLIST1 (t, method_counter);
293 /* GCC 3.x will never produce stabs stub methods, so
294 we don't need to handle this case. */
295 if (TYPE_FN_FIELD_STUB (f, field_counter))
297 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
298 if (! is_constructor_name (phys_name))
301 /* If this method is actually defined, include it in the
303 sym_arr[i1] = lookup_symbol (phys_name,
306 (struct symtab **) NULL);
314 /* Only search baseclasses if there is no match yet, since names in
315 derived classes override those in baseclasses.
317 FIXME: The above is not true; it is only true of member functions
318 if they have the same number of arguments (??? - section 13.1 of the
319 ARM says the function members are not in the same scope but doesn't
320 really spell out the rules in a way I understand. In any case, if
321 the number of arguments differ this is a case in which we can overload
322 rather than hiding without any problem, and gcc 2.4.5 does overload
323 rather than hiding in this case). */
326 for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
327 i1 += find_methods (TYPE_BASECLASS (t, ibase), name, sym_arr + i1);
332 /* Helper function for decode_line_1.
333 Build a canonical line spec in CANONICAL if it is non-NULL and if
334 the SAL has a symtab.
335 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
336 If SYMNAME is NULL the line number from SAL is used and the canonical
337 line spec is `filename:linenum'. */
340 build_canonical_line_spec (struct symtab_and_line *sal, char *symname,
343 char **canonical_arr;
344 char *canonical_name;
346 struct symtab *s = sal->symtab;
348 if (s == (struct symtab *) NULL
349 || s->filename == (char *) NULL
350 || canonical == (char ***) NULL)
353 canonical_arr = (char **) xmalloc (sizeof (char *));
354 *canonical = canonical_arr;
356 filename = s->filename;
359 canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2);
360 sprintf (canonical_name, "%s:%s", filename, symname);
364 canonical_name = xmalloc (strlen (filename) + 30);
365 sprintf (canonical_name, "%s:%d", filename, sal->line);
367 canonical_arr[0] = canonical_name;
372 /* Find an instance of the character C in the string S that is outside
373 of all parenthesis pairs, single-quoted strings, and double-quoted
374 strings. Also, ignore the char within a template name, like a ','
375 within foo<int, int>. */
378 find_toplevel_char (char *s, char c)
380 int quoted = 0; /* zero if we're not in quotes;
381 '"' if we're in a double-quoted string;
382 '\'' if we're in a single-quoted string. */
383 int depth = 0; /* Number of unclosed parens we've seen. */
386 for (scan = s; *scan; scan++)
392 else if (*scan == '\\' && *(scan + 1))
395 else if (*scan == c && ! quoted && depth == 0)
397 else if (*scan == '"' || *scan == '\'')
399 else if (*scan == '(' || *scan == '<')
401 else if ((*scan == ')' || *scan == '>') && depth > 0)
408 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
409 operate on (ask user if necessary).
410 If CANONICAL is non-NULL return a corresponding array of mangled names
411 as canonical line specs there. */
413 static struct symtabs_and_lines
414 decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline,
417 struct symtabs_and_lines values, return_values;
422 struct cleanup *old_chain;
423 char **canonical_arr = (char **) NULL;
425 values.sals = (struct symtab_and_line *)
426 alloca (nelts * sizeof (struct symtab_and_line));
427 return_values.sals = (struct symtab_and_line *)
428 xmalloc (nelts * sizeof (struct symtab_and_line));
429 old_chain = make_cleanup (xfree, return_values.sals);
433 canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
434 make_cleanup (xfree, canonical_arr);
435 memset (canonical_arr, 0, nelts * sizeof (char *));
436 *canonical = canonical_arr;
440 printf_unfiltered ("[0] cancel\n[1] all\n");
443 init_sal (&return_values.sals[i]); /* Initialize to zeroes. */
444 init_sal (&values.sals[i]);
445 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
447 values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
448 printf_unfiltered ("[%d] %s at %s:%d\n",
450 SYMBOL_PRINT_NAME (sym_arr[i]),
451 values.sals[i].symtab->filename,
452 values.sals[i].line);
455 printf_unfiltered ("?HERE\n");
459 prompt = getenv ("PS2");
464 args = command_line_input (prompt, 0, "overload-choice");
466 if (args == 0 || *args == 0)
467 error_no_arg ("one or more choice numbers");
475 while (*arg1 >= '0' && *arg1 <= '9')
477 if (*arg1 && *arg1 != ' ' && *arg1 != '\t')
478 error ("Arguments must be choice numbers.");
488 for (i = 0; i < nelts; i++)
490 if (canonical_arr[i] == NULL)
492 symname = DEPRECATED_SYMBOL_NAME (sym_arr[i]);
493 canonical_arr[i] = savestring (symname, strlen (symname));
497 memcpy (return_values.sals, values.sals,
498 (nelts * sizeof (struct symtab_and_line)));
499 return_values.nelts = nelts;
500 discard_cleanups (old_chain);
501 return return_values;
504 if (num >= nelts + 2)
506 printf_unfiltered ("No choice number %d.\n", num);
511 if (values.sals[num].pc)
515 symname = DEPRECATED_SYMBOL_NAME (sym_arr[num]);
516 make_cleanup (xfree, symname);
517 canonical_arr[i] = savestring (symname, strlen (symname));
519 return_values.sals[i++] = values.sals[num];
520 values.sals[num].pc = 0;
524 printf_unfiltered ("duplicate request for %d ignored.\n", num);
529 while (*args == ' ' || *args == '\t')
532 return_values.nelts = i;
533 discard_cleanups (old_chain);
534 return return_values;
537 /* The parser of linespec itself. */
539 /* Parse a string that specifies a line number.
540 Pass the address of a char * variable; that variable will be
541 advanced over the characters actually parsed.
545 LINENUM -- that line number in current file. PC returned is 0.
546 FILE:LINENUM -- that line in that file. PC returned is 0.
547 FUNCTION -- line number of openbrace of that function.
548 PC returned is the start of the function.
549 VARIABLE -- line number of definition of that variable.
551 FILE:FUNCTION -- likewise, but prefer functions in that file.
552 *EXPR -- line in which address EXPR appears.
554 This may all be followed by an "if EXPR", which we ignore.
556 FUNCTION may be an undebuggable function found in minimal symbol table.
558 If the argument FUNFIRSTLINE is nonzero, we want the first line
559 of real code inside a function when a function is specified, and it is
560 not OK to specify a variable or type to get its line number.
562 DEFAULT_SYMTAB specifies the file to use if none is specified.
563 It defaults to current_source_symtab.
564 DEFAULT_LINE specifies the line number to use for relative
565 line numbers (that start with signs). Defaults to current_source_line.
566 If CANONICAL is non-NULL, store an array of strings containing the canonical
567 line specs there if necessary. Currently overloaded member functions and
568 line numbers or static functions without a filename yield a canonical
569 line spec. The array and the line spec strings are allocated on the heap,
570 it is the callers responsibility to free them.
572 Note that it is possible to return zero for the symtab
573 if no file is validly specified. Callers must check that.
574 Also, the line number returned may be invalid. */
576 /* We allow single quotes in various places. This is a hideous
577 kludge, which exists because the completer can't yet deal with the
578 lack of single quotes. FIXME: write a linespec_completer which we
579 can use as appropriate instead of make_symbol_completion_list. */
581 struct symtabs_and_lines
582 decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
583 int default_line, char ***canonical)
587 /* If a file name is specified, this is its symtab. */
588 struct symtab *file_symtab = NULL;
591 /* This is NULL if there are no parens in *ARGPTR, or a pointer to
592 the closing parenthesis if there are parens. */
594 /* This says whether or not something in *ARGPTR is quoted with
595 completer_quotes (i.e. with single quotes). */
597 /* Is part of *ARGPTR is enclosed in double quotes? */
598 int is_quote_enclosed;
599 int is_objc_method = 0;
600 char *saved_arg = *argptr;
602 /* Defaults have defaults. */
604 initialize_defaults (&default_symtab, &default_line);
606 /* See if arg is *PC. */
609 return decode_indirect (argptr);
611 /* Set various flags. 'paren_pointer' is important for overload
612 checking, where we allow things like:
613 (gdb) break c::f(int)
616 set_flags (*argptr, &is_quoted, &paren_pointer);
618 /* Check to see if it's a multipart linespec (with colons or
621 /* Locate the end of the first half of the linespec. */
623 p = locate_first_half (argptr, &is_quote_enclosed);
625 /* Check if this is an Objective-C method (anything that starts with
626 a '+' or '-' and a '['). */
627 if (*p && (p[0] == ':') && (strchr ("+-", p[1]) != NULL)
631 paren_pointer = NULL; /* Just a category name. Ignore it. */
634 /* Check if the symbol could be an Objective-C selector. */
637 struct symtabs_and_lines values;
638 values = decode_objc (argptr, funfirstline, NULL,
639 canonical, saved_arg);
640 if (values.sals != NULL)
644 /* Does it look like there actually were two parts? */
646 if ((p[0] == ':' || p[0] == '.') && paren_pointer == NULL)
649 *argptr = *argptr + 1;
651 /* Is it a C++ or Java compound data structure? */
653 if (p[0] == '.' || p[1] == ':')
654 return decode_compound (argptr, funfirstline, canonical,
657 /* No, the first part is a filename; set s to be that file's
658 symtab. Also, move argptr past the filename. */
660 file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed);
663 /* No one really seems to know why this was added. It certainly
664 breaks the command line, though, whenever the passed
665 name is of the form ClassName::Method. This bit of code
666 singles out the class name, and if funfirstline is set (for
667 example, you are setting a breakpoint at this function),
668 you get an error. This did not occur with earlier
669 verions, so I am ifdef'ing this out. 3/29/99 */
672 /* Check if what we have till now is a symbol name */
674 /* We may be looking at a template instantiation such
675 as "foo<int>". Check here whether we know about it,
676 instead of falling through to the code below which
677 handles ordinary function names, because that code
678 doesn't like seeing '<' and '>' in a name -- the
679 skip_quoted call doesn't go past them. So see if we
680 can figure it out right now. */
682 copy = (char *) alloca (p - *argptr + 1);
683 memcpy (copy, *argptr, p - *argptr);
684 copy[p - *argptr] = '\000';
685 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0, &sym_symtab);
688 *argptr = (*p == '\'') ? p + 1 : p;
689 return symbol_found (funfirstline, canonical, copy, sym,
692 /* Otherwise fall out from here and go to file/line spec
697 /* S is specified file's symtab, or 0 if no file specified.
698 arg no longer contains the file name. */
700 /* Check whether arg is all digits (and sign). */
703 if (*q == '-' || *q == '+')
705 while (*q >= '0' && *q <= '9')
708 if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ','))
709 /* We found a token consisting of all digits -- at least one digit. */
710 return decode_all_digits (argptr, default_symtab, default_line,
711 canonical, file_symtab, q);
713 /* Arg token is not digits => try it as a variable name
714 Find the next token (everything up to end or next whitespace). */
716 if (**argptr == '$') /* May be a convenience variable. */
717 /* One or two $ chars possible. */
718 p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1));
721 p = skip_quoted (*argptr);
723 error ("Unmatched single quote.");
725 else if (is_objc_method)
727 /* allow word separators in method names for Obj-C */
728 p = skip_quoted_chars (*argptr, NULL, "");
730 else if (paren_pointer != NULL)
732 p = paren_pointer + 1;
736 p = skip_quoted (*argptr);
739 copy = (char *) alloca (p - *argptr + 1);
740 memcpy (copy, *argptr, p - *argptr);
741 copy[p - *argptr] = '\0';
744 && copy[0] == copy[p - *argptr - 1]
745 && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
747 copy[p - *argptr - 1] = '\0';
750 while (*p == ' ' || *p == '\t')
754 /* If it starts with $: may be a legitimate variable or routine name
755 (e.g. HP-UX millicode routines such as $$dyncall), or it may
756 be history value, or it may be a convenience variable. */
759 return decode_dollar (copy, funfirstline, default_symtab,
760 canonical, file_symtab);
762 /* Look up that token as a variable.
763 If file specified, use that file's per-file block to start with. */
765 return decode_variable (copy, funfirstline, canonical, file_symtab);
770 /* Now, more helper functions for decode_line_1. Some conventions
771 that these functions follow:
773 Decode_line_1 typically passes along some of its arguments or local
774 variables to the subfunctions. It passes the variables by
775 reference if they are modified by the subfunction, and by value
778 Some of the functions have side effects that don't arise from
779 variables that are passed by reference. In particular, if a
780 function is passed ARGPTR as an argument, it modifies what ARGPTR
781 points to; typically, it advances *ARGPTR past whatever substring
782 it has just looked at. (If it doesn't modify *ARGPTR, then the
783 function gets passed *ARGPTR instead, which is then called ARG: see
784 set_flags, for example.) Also, functions that return a struct
785 symtabs_and_lines may modify CANONICAL, as in the description of
788 If a function returns a struct symtabs_and_lines, then that struct
789 will immediately make its way up the call chain to be returned by
790 decode_line_1. In particular, all of the functions decode_XXX
791 calculate the appropriate struct symtabs_and_lines, under the
792 assumption that their argument is of the form XXX. */
794 /* First, some functions to initialize stuff at the beggining of the
798 initialize_defaults (struct symtab **default_symtab, int *default_line)
800 if (*default_symtab == 0)
802 /* Use whatever we have for the default source line. We don't use
803 get_current_or_default_symtab_and_line as it can recurse and call
805 struct symtab_and_line cursal =
806 get_current_source_symtab_and_line ();
808 *default_symtab = cursal.symtab;
809 *default_line = cursal.line;
814 set_flags (char *arg, int *is_quoted, char **paren_pointer)
819 /* 'has_if' is for the syntax:
820 (gdb) break foo if (a==b)
822 if ((ii = strstr (arg, " if ")) != NULL ||
823 (ii = strstr (arg, "\tif ")) != NULL ||
824 (ii = strstr (arg, " if\t")) != NULL ||
825 (ii = strstr (arg, "\tif\t")) != NULL ||
826 (ii = strstr (arg, " if(")) != NULL ||
827 (ii = strstr (arg, "\tif( ")) != NULL)
829 /* Temporarily zap out "if (condition)" to not confuse the
830 parenthesis-checking code below. This is undone below. Do not
838 && strchr (get_gdb_completer_quote_characters (),
841 *paren_pointer = strchr (arg, '(');
842 if (*paren_pointer != NULL)
843 *paren_pointer = strrchr (*paren_pointer, ')');
845 /* Now that we're safely past the paren_pointer check, put back " if
846 (condition)" so outer layers can see it. */
853 /* Decode arg of the form *PC. */
855 static struct symtabs_and_lines
856 decode_indirect (char **argptr)
858 struct symtabs_and_lines values;
862 pc = parse_and_eval_address_1 (argptr);
864 values.sals = (struct symtab_and_line *)
865 xmalloc (sizeof (struct symtab_and_line));
868 values.sals[0] = find_pc_line (pc, 0);
869 values.sals[0].pc = pc;
870 values.sals[0].section = find_pc_overlay (pc);
877 /* Locate the first half of the linespec, ending in a colon, period,
878 or whitespace. (More or less.) Also, check to see if *ARGPTR is
879 enclosed in double quotes; if so, set is_quote_enclosed, advance
880 ARGPTR past that and zero out the trailing double quote. */
883 locate_first_half (char **argptr, int *is_quote_enclosed)
889 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
890 and we must isolate the first half. Outer layers will call again later
893 Don't count commas that appear in argument lists of overloaded
894 functions, or in quoted strings. It's stupid to go to this much
895 trouble when the rest of the function is such an obvious roach hotel. */
896 ii = find_toplevel_char (*argptr, ',');
897 has_comma = (ii != 0);
899 /* Temporarily zap out second half to not confuse the code below.
900 This is undone below. Do not change ii!! */
906 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
907 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
913 *is_quote_enclosed = 1;
918 *is_quote_enclosed = 0;
923 char *temp_end = find_template_name_end (p);
925 error ("malformed template specification in command");
928 /* Check for a colon and a plus or minus and a [ (which
929 indicates an Objective-C method) */
930 if (*p && (p[0] == ':') && (strchr ("+-", p[1]) != NULL)
935 /* Check for the end of the first half of the linespec. End of
936 line, a tab, a double colon or the last single colon, or a
937 space. But if enclosed in double quotes we do not break on
942 && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
943 || ((p[0] == ' ') && !*is_quote_enclosed))
945 if (p[0] == '.' && strchr (p, ':') == NULL)
947 /* Java qualified method. Find the *last* '.', since the
948 others are package qualifiers. */
949 for (p1 = p; *p1; p1++)
957 while (p[0] == ' ' || p[0] == '\t')
960 /* If the closing double quote was left at the end, remove it. */
961 if (*is_quote_enclosed)
963 char *closing_quote = strchr (p - 1, '"');
964 if (closing_quote && closing_quote[1] == '\0')
965 *closing_quote = '\0';
968 /* Now that we've safely parsed the first half, put back ',' so
969 outer layers can see it. */
978 /* Here's where we recognise an Objective-C Selector. An Objective C
979 selector may be implemented by more than one class, therefore it
980 may represent more than one method/function. This gives us a
981 situation somewhat analogous to C++ overloading. If there's more
982 than one method that could represent the selector, then use some of
983 the existing C++ code to let the user choose one. */
985 struct symtabs_and_lines
986 decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab,
987 char ***canonical, char *saved_arg)
989 struct symtabs_and_lines values;
990 struct symbol **sym_arr = NULL;
991 struct symbol *sym = NULL;
993 struct block *block = NULL;
1000 if (file_symtab != NULL)
1001 block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), STATIC_BLOCK);
1003 block = get_selected_block (0);
1005 copy = find_imps (file_symtab, block, *argptr, NULL, &i1, &i2);
1009 sym_arr = (struct symbol **) alloca ((i1 + 1) * sizeof (struct symbol *));
1012 copy = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2);
1016 /* i1 now represents the TOTAL number of matches found.
1017 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1018 which will come first in the sym_arr array. Any low-level
1019 (minimal_symbol) matches will follow those. */
1025 /* Already a struct symbol. */
1030 sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0]));
1031 if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]), SYMBOL_LINKAGE_NAME (sym)) != 0)
1033 warning ("debugging symbol \"%s\" does not match selector; ignoring", SYMBOL_LINKAGE_NAME (sym));
1038 values.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line));
1041 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1043 /* Canonicalize this, so it remains resolved for dylib loads. */
1044 values.sals[0] = find_function_start_sal (sym, funfirstline);
1045 build_canonical_line_spec (values.sals, SYMBOL_NATURAL_NAME (sym), canonical);
1049 /* The only match was a non-debuggable symbol. */
1050 values.sals[0].symtab = 0;
1051 values.sals[0].line = 0;
1052 values.sals[0].end = 0;
1053 values.sals[0].pc = SYMBOL_VALUE_ADDRESS (sym_arr[0]);
1060 /* More than one match. The user must choose one or more. */
1061 return decode_line_2 (sym_arr, i2, funfirstline, canonical);
1067 /* This handles C++ and Java compound data structures. P should point
1068 at the first component separator, i.e. double-colon or period. */
1070 static struct symtabs_and_lines
1071 decode_compound (char **argptr, int funfirstline, char ***canonical,
1072 char *saved_arg, char *p)
1074 struct symtabs_and_lines values;
1079 char *saved_arg2 = *argptr;
1082 /* The symtab that SYM was found in. */
1083 struct symtab *sym_symtab;
1085 struct symbol *sym_class;
1086 struct symbol **sym_arr;
1089 /* First check for "global" namespace specification,
1090 of the form "::foo". If found, skip over the colons
1091 and jump to normal symbol processing. */
1093 && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
1096 /* We have what looks like a class or namespace
1097 scope specification (A::B), possibly with many
1098 levels of namespaces or classes (A::B::C::D).
1100 Some versions of the HP ANSI C++ compiler (as also possibly
1101 other compilers) generate class/function/member names with
1102 embedded double-colons if they are inside namespaces. To
1103 handle this, we loop a few times, considering larger and
1104 larger prefixes of the string as though they were single
1105 symbols. So, if the initially supplied string is
1106 A::B::C::D::foo, we have to look up "A", then "A::B",
1107 then "A::B::C", then "A::B::C::D", and finally
1108 "A::B::C::D::foo" as single, monolithic symbols, because
1109 A, B, C or D may be namespaces.
1111 Note that namespaces can nest only inside other
1112 namespaces, and not inside classes. So we need only
1113 consider *prefixes* of the string; there is no need to look up
1114 "B::C" separately as a symbol in the previous example. */
1116 p2 = p; /* Save for restart. */
1119 sym_class = lookup_prefix_sym (argptr, p);
1122 (t = check_typedef (SYMBOL_TYPE (sym_class)),
1123 (TYPE_CODE (t) == TYPE_CODE_STRUCT
1124 || TYPE_CODE (t) == TYPE_CODE_UNION)))
1126 /* Arg token is not digits => try it as a function name.
1127 Find the next token (everything up to end or next
1130 && strchr (get_gdb_completer_quote_characters (),
1133 p = skip_quoted (*argptr);
1134 *argptr = *argptr + 1;
1139 while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':')
1143 q = operator_chars (*argptr, &q1);
1147 char *tmp = alloca (q1 - q + 1);
1148 memcpy (tmp, q, q1 - q);
1150 opname = cplus_mangle_opname (tmp, DMGL_ANSI);
1153 cplusplus_error (saved_arg, "no mangling for \"%s\"\n", tmp);
1155 copy = (char*) alloca (3 + strlen(opname));
1156 sprintf (copy, "__%s", opname);
1162 copy = (char *) alloca (p - *argptr + 1);
1163 memcpy (copy, *argptr, p - *argptr);
1164 copy[p - *argptr] = '\0';
1166 && copy[p - *argptr - 1]
1167 && strchr (get_gdb_completer_quote_characters (),
1168 copy[p - *argptr - 1]) != NULL)
1169 copy[p - *argptr - 1] = '\0';
1172 /* No line number may be specified. */
1173 while (*p == ' ' || *p == '\t')
1177 return find_method (funfirstline, canonical, saved_arg,
1178 copy, t, sym_class);
1181 /* Move pointer up to next possible class/namespace token. */
1182 p = p2 + 1; /* Restart with old value +1. */
1183 /* Move pointer ahead to next double-colon. */
1184 while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\''))
1188 temp_end = find_template_name_end (p);
1190 error ("malformed template specification in command");
1193 else if ((p[0] == ':') && (p[1] == ':'))
1194 break; /* Found double-colon. */
1200 break; /* Out of the while (1). */
1202 p2 = p; /* Save restart for next time around. */
1203 *argptr = saved_arg2; /* Restore argptr. */
1206 /* Last chance attempt -- check entire name as a symbol. Use "copy"
1207 in preparation for jumping out of this block, to be consistent
1208 with usage following the jump target. */
1209 copy = (char *) alloca (p - saved_arg2 + 1);
1210 memcpy (copy, saved_arg2, p - saved_arg2);
1211 /* Note: if is_quoted should be true, we snuff out quote here
1213 copy[p - saved_arg2] = '\000';
1214 /* Set argptr to skip over the name. */
1215 *argptr = (*p == '\'') ? p + 1 : p;
1216 /* Look up entire name */
1217 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0, &sym_symtab);
1219 return symbol_found (funfirstline, canonical, copy, sym,
1222 /* Couldn't find any interpretation as classes/namespaces, so give
1223 up. The quotes are important if copy is empty. */
1224 cplusplus_error (saved_arg,
1225 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1229 /* Next come some helper functions for decode_compound. */
1231 /* Return the symbol corresponding to the substring of *ARGPTR ending
1232 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1233 name in question, the compound object separator ("::" or "."), and
1236 static struct symbol *
1237 lookup_prefix_sym (char **argptr, char *p)
1242 /* Extract the class name. */
1244 while (p != *argptr && p[-1] == ' ')
1246 copy = (char *) alloca (p - *argptr + 1);
1247 memcpy (copy, *argptr, p - *argptr);
1248 copy[p - *argptr] = 0;
1250 /* Discard the class name from the arg. */
1251 p = p1 + (p1[0] == ':' ? 2 : 1);
1252 while (*p == ' ' || *p == '\t')
1256 return lookup_symbol (copy, 0, STRUCT_DOMAIN, 0,
1257 (struct symtab **) NULL);
1260 /* This finds the method COPY in the class whose type is T and whose
1261 symbol is SYM_CLASS. */
1263 static struct symtabs_and_lines
1264 find_method (int funfirstline, char ***canonical, char *saved_arg,
1265 char *copy, struct type *t, struct symbol *sym_class)
1267 struct symtabs_and_lines values;
1268 struct symbol *sym = 0;
1269 int i1; /* Counter for the symbol array. */
1270 struct symbol **sym_arr = alloca (total_number_of_methods (t)
1271 * sizeof (struct symbol *));
1273 /* Find all methods with a matching name, and put them in
1276 i1 = collect_methods (copy, t, sym_arr);
1280 /* There is exactly one field with that name. */
1283 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1285 values.sals = (struct symtab_and_line *)
1286 xmalloc (sizeof (struct symtab_and_line));
1288 values.sals[0] = find_function_start_sal (sym,
1299 /* There is more than one field with that name
1300 (overloaded). Ask the user which one to use. */
1301 return decode_line_2 (sym_arr, i1, funfirstline, canonical);
1307 if (is_operator_name (copy))
1309 tmp = (char *) alloca (strlen (copy + 3) + 9);
1310 strcpy (tmp, "operator ");
1311 strcat (tmp, copy + 3);
1316 cplusplus_error (saved_arg,
1317 "the class `%s' does not have destructor defined\n",
1318 SYMBOL_PRINT_NAME (sym_class));
1320 cplusplus_error (saved_arg,
1321 "the class %s does not have any method named %s\n",
1322 SYMBOL_PRINT_NAME (sym_class), tmp);
1326 /* Find all methods named COPY in the class whose type is T, and put
1327 them in SYM_ARR. Return the number of methods found. */
1330 collect_methods (char *copy, struct type *t,
1331 struct symbol **sym_arr)
1333 int i1 = 0; /* Counter for the symbol array. */
1335 if (destructor_name_p (copy, t))
1337 /* Destructors are a special case. */
1338 int m_index, f_index;
1340 if (get_destructor_fn_field (t, &m_index, &f_index))
1342 struct fn_field *f = TYPE_FN_FIELDLIST1 (t, m_index);
1345 lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, f_index),
1346 NULL, VAR_DOMAIN, (int *) NULL,
1347 (struct symtab **) NULL);
1353 i1 = find_methods (t, copy, sym_arr);
1360 /* Return the symtab associated to the filename given by the substring
1361 of *ARGPTR ending at P, and advance ARGPTR past that filename. */
1363 static struct symtab *
1364 symtab_from_filename (char **argptr, char *p, int is_quote_enclosed)
1368 struct symtab *file_symtab;
1371 while (p != *argptr && p[-1] == ' ')
1373 if ((*p == '"') && is_quote_enclosed)
1375 copy = (char *) alloca (p - *argptr + 1);
1376 memcpy (copy, *argptr, p - *argptr);
1377 /* It may have the ending quote right after the file name. */
1378 if (is_quote_enclosed && copy[p - *argptr - 1] == '"')
1379 copy[p - *argptr - 1] = 0;
1381 copy[p - *argptr] = 0;
1383 /* Find that file's data. */
1384 file_symtab = lookup_symtab (copy);
1385 if (file_symtab == 0)
1387 if (!have_full_symbols () && !have_partial_symbols ())
1388 error ("No symbol table is loaded. Use the \"file\" command.");
1389 error ("No source file named %s.", copy);
1392 /* Discard the file name from the arg. */
1394 while (*p == ' ' || *p == '\t')
1403 /* This decodes a line where the argument is all digits (possibly
1404 preceded by a sign). Q should point to the end of those digits;
1405 the other arguments are as usual. */
1407 static struct symtabs_and_lines
1408 decode_all_digits (char **argptr, struct symtab *default_symtab,
1409 int default_line, char ***canonical,
1410 struct symtab *file_symtab, char *q)
1413 struct symtabs_and_lines values;
1414 struct symtab_and_line val;
1422 /* We might need a canonical line spec if no file was specified. */
1423 int need_canonical = (file_symtab == 0) ? 1 : 0;
1427 /* This is where we need to make sure that we have good defaults.
1428 We must guarantee that this section of code is never executed
1429 when we are called with just a function name, since
1430 set_default_source_symtab_and_line uses
1431 select_source_symtab that calls us with such an argument. */
1433 if (file_symtab == 0 && default_symtab == 0)
1435 /* Make sure we have at least a default source file. */
1436 set_default_source_symtab_and_line ();
1437 initialize_defaults (&default_symtab, &default_line);
1440 if (**argptr == '+')
1441 sign = plus, (*argptr)++;
1442 else if (**argptr == '-')
1443 sign = minus, (*argptr)++;
1444 val.line = atoi (*argptr);
1450 if (file_symtab == 0)
1451 val.line = default_line + val.line;
1456 if (file_symtab == 0)
1457 val.line = default_line - val.line;
1462 break; /* No need to adjust val.line. */
1465 while (*q == ' ' || *q == '\t')
1468 if (file_symtab == 0)
1469 file_symtab = default_symtab;
1471 /* It is possible that this source file has more than one symtab,
1472 and that the new line number specification has moved us from the
1473 default (in file_symtab) to a new one. */
1474 val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL);
1475 if (val.symtab == 0)
1476 val.symtab = file_symtab;
1479 values.sals = (struct symtab_and_line *)
1480 xmalloc (sizeof (struct symtab_and_line));
1481 values.sals[0] = val;
1484 build_canonical_line_spec (values.sals, NULL, canonical);
1490 /* Decode a linespec starting with a dollar sign. */
1492 static struct symtabs_and_lines
1493 decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab,
1494 char ***canonical, struct symtab *file_symtab)
1498 int need_canonical = 0;
1499 struct symtabs_and_lines values;
1500 struct symtab_and_line val;
1503 /* The symtab that SYM was found in. */
1504 struct symtab *sym_symtab;
1505 struct minimal_symbol *msymbol;
1507 p = (copy[1] == '$') ? copy + 2 : copy + 1;
1508 while (*p >= '0' && *p <= '9')
1510 if (!*p) /* Reached end of token without hitting non-digit. */
1512 /* We have a value history reference. */
1513 sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
1514 valx = access_value_history ((copy[1] == '$') ? -index : index);
1515 if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT)
1516 error ("History values used in line specs must have integer values.");
1520 /* Not all digits -- may be user variable/function or a
1521 convenience variable. */
1523 /* Look up entire name as a symbol first. */
1524 sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0, &sym_symtab);
1525 file_symtab = (struct symtab *) 0;
1527 /* Symbol was found --> jump to normal symbol processing. */
1529 return symbol_found (funfirstline, canonical, copy, sym,
1532 /* If symbol was not found, look in minimal symbol tables. */
1533 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1534 /* Min symbol was found --> jump to minsym processing. */
1536 return minsym_found (funfirstline, msymbol);
1538 /* Not a user variable or function -- must be convenience variable. */
1539 need_canonical = (file_symtab == 0) ? 1 : 0;
1540 valx = value_of_internalvar (lookup_internalvar (copy + 1));
1541 if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT)
1542 error ("Convenience variables used in line specs must have integer values.");
1547 /* Either history value or convenience value from above, in valx. */
1548 val.symtab = file_symtab ? file_symtab : default_symtab;
1549 val.line = value_as_long (valx);
1552 values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
1553 values.sals[0] = val;
1557 build_canonical_line_spec (values.sals, NULL, canonical);
1564 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1565 look in that symtab's static variables first. */
1567 static struct symtabs_and_lines
1568 decode_variable (char *copy, int funfirstline, char ***canonical,
1569 struct symtab *file_symtab)
1572 /* The symtab that SYM was found in. */
1573 struct symtab *sym_symtab;
1575 struct minimal_symbol *msymbol;
1577 sym = lookup_symbol (copy,
1579 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab),
1581 : get_selected_block (0)),
1582 VAR_DOMAIN, 0, &sym_symtab);
1585 return symbol_found (funfirstline, canonical, copy, sym,
1586 file_symtab, sym_symtab);
1588 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1590 if (msymbol != NULL)
1591 return minsym_found (funfirstline, msymbol);
1593 if (!have_full_symbols () &&
1594 !have_partial_symbols () && !have_minimal_symbols ())
1595 error ("No symbol table is loaded. Use the \"file\" command.");
1597 error ("Function \"%s\" not defined.", copy);
1603 /* Now come some functions that are called from multiple places within
1606 /* We've found a symbol SYM to associate with our linespec; build a
1607 corresponding struct symtabs_and_lines. */
1609 static struct symtabs_and_lines
1610 symbol_found (int funfirstline, char ***canonical, char *copy,
1611 struct symbol *sym, struct symtab *file_symtab,
1612 struct symtab *sym_symtab)
1614 struct symtabs_and_lines values;
1616 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
1618 /* Arg is the name of a function */
1619 values.sals = (struct symtab_and_line *)
1620 xmalloc (sizeof (struct symtab_and_line));
1621 values.sals[0] = find_function_start_sal (sym, funfirstline);
1624 /* Don't use the SYMBOL_LINE; if used at all it points to
1625 the line containing the parameters or thereabouts, not
1626 the first line of code. */
1628 /* We might need a canonical line spec if it is a static
1630 if (file_symtab == 0)
1632 struct blockvector *bv = BLOCKVECTOR (sym_symtab);
1633 struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1634 if (lookup_block_symbol (b, copy, NULL, VAR_DOMAIN) != NULL)
1635 build_canonical_line_spec (values.sals, copy, canonical);
1642 error ("\"%s\" is not a function", copy);
1643 else if (SYMBOL_LINE (sym) != 0)
1645 /* We know its line number. */
1646 values.sals = (struct symtab_and_line *)
1647 xmalloc (sizeof (struct symtab_and_line));
1649 memset (&values.sals[0], 0, sizeof (values.sals[0]));
1650 values.sals[0].symtab = sym_symtab;
1651 values.sals[0].line = SYMBOL_LINE (sym);
1655 /* This can happen if it is compiled with a compiler which doesn't
1656 put out line numbers for variables. */
1657 /* FIXME: Shouldn't we just set .line and .symtab to zero
1658 and return? For example, "info line foo" could print
1660 error ("Line number not known for symbol \"%s\"", copy);
1664 /* We've found a minimal symbol MSYMBOL to associate with our
1665 linespec; build a corresponding struct symtabs_and_lines. */
1667 static struct symtabs_and_lines
1668 minsym_found (int funfirstline, struct minimal_symbol *msymbol)
1670 struct symtabs_and_lines values;
1672 values.sals = (struct symtab_and_line *)
1673 xmalloc (sizeof (struct symtab_and_line));
1674 values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
1675 (struct sec *) 0, 0);
1676 values.sals[0].section = SYMBOL_BFD_SECTION (msymbol);
1679 values.sals[0].pc += FUNCTION_START_OFFSET;
1680 values.sals[0].pc = SKIP_PROLOGUE (values.sals[0].pc);