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
5 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 2 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, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
33 #include "completer.h"
35 #include "parser-defs.h"
37 #include "objc-lang.h"
39 #include "exceptions.h"
42 /* We share this one with symtab.c, but it is not exported widely. */
44 extern char *operator_chars (char *, char **);
46 /* Prototypes for local functions */
48 static void initialize_defaults (struct symtab
**default_symtab
,
51 static void set_flags (char *arg
, int *is_quoted
, char **paren_pointer
);
53 static struct symtabs_and_lines
decode_indirect (char **argptr
);
55 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
57 static struct symtabs_and_lines
decode_objc (char **argptr
,
59 struct symtab
*file_symtab
,
63 static struct symtabs_and_lines
decode_compound (char **argptr
,
69 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
71 static struct symtabs_and_lines
find_method (int funfirstline
,
76 struct symbol
*sym_class
);
78 static int collect_methods (char *copy
, struct type
*t
,
79 struct symbol
*sym_class
,
80 struct symbol
**sym_arr
);
82 static NORETURN
void cplusplus_error (const char *name
,
84 ATTR_NORETURN
ATTR_FORMAT (printf
, 2, 3);
86 static int total_number_of_methods (struct type
*type
);
88 static int find_methods (struct type
*, char *,
89 enum language
, struct symbol
**);
91 static int add_matching_methods (int method_counter
, struct type
*t
,
92 enum language language
,
93 struct symbol
**sym_arr
);
95 static int add_constructors (int method_counter
, struct type
*t
,
96 enum language language
,
97 struct symbol
**sym_arr
);
99 static void build_canonical_line_spec (struct symtab_and_line
*,
102 static char *find_toplevel_char (char *s
, char c
);
104 static int is_objc_method_format (const char *s
);
106 static struct symtabs_and_lines
decode_line_2 (struct symbol
*[],
109 static struct symtab
*symtab_from_filename (char **argptr
,
110 char *p
, int is_quote_enclosed
,
114 symtabs_and_lines
decode_all_digits (char **argptr
,
115 struct symtab
*default_symtab
,
118 struct symtab
*file_symtab
,
121 static struct symtabs_and_lines
decode_dollar (char *copy
,
123 struct symtab
*default_symtab
,
125 struct symtab
*file_symtab
);
127 static struct symtabs_and_lines
decode_variable (char *copy
,
130 struct symtab
*file_symtab
,
134 symtabs_and_lines
symbol_found (int funfirstline
,
138 struct symtab
*file_symtab
,
139 struct symtab
*sym_symtab
);
142 symtabs_and_lines
minsym_found (int funfirstline
,
143 struct minimal_symbol
*msymbol
);
145 /* Helper functions. */
147 /* Issue a helpful hint on using the command completion feature on
148 single quoted demangled C++ symbols as part of the completion
152 cplusplus_error (const char *name
, const char *fmt
, ...)
154 struct ui_file
*tmp_stream
;
155 tmp_stream
= mem_fileopen ();
156 make_cleanup_ui_file_delete (tmp_stream
);
160 va_start (args
, fmt
);
161 vfprintf_unfiltered (tmp_stream
, fmt
, args
);
165 while (*name
== '\'')
167 fprintf_unfiltered (tmp_stream
,
168 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
169 "(Note leading single quote.)"),
171 error_stream (tmp_stream
);
174 /* Return the number of methods described for TYPE, including the
175 methods from types it derives from. This can't be done in the symbol
176 reader because the type of the baseclass might still be stubbed
177 when the definition of the derived class is parsed. */
180 total_number_of_methods (struct type
*type
)
185 CHECK_TYPEDEF (type
);
186 if (TYPE_CPLUS_SPECIFIC (type
) == NULL
)
188 count
= TYPE_NFN_FIELDS_TOTAL (type
);
190 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
191 count
+= total_number_of_methods (TYPE_BASECLASS (type
, n
));
196 /* Recursive helper function for decode_line_1.
197 Look for methods named NAME in type T.
198 Return number of matches.
199 Put matches in SYM_ARR, which should have been allocated with
200 a size of total_number_of_methods (T) * sizeof (struct symbol *).
201 Note that this function is g++ specific. */
204 find_methods (struct type
*t
, char *name
, enum language language
,
205 struct symbol
**sym_arr
)
209 char *class_name
= type_name_no_tag (t
);
211 /* Ignore this class if it doesn't have a name. This is ugly, but
212 unless we figure out how to get the physname without the name of
213 the class, then the loop can't do any good. */
215 && (lookup_symbol_in_language (class_name
, (struct block
*) NULL
,
216 STRUCT_DOMAIN
, language
, (int *) NULL
,
217 (struct symtab
**) NULL
)))
220 int name_len
= strlen (name
);
224 /* Loop over each method name. At this level, all overloads of a name
225 are counted as a single name. There is an inner loop which loops over
228 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
232 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
235 if (strncmp (method_name
, "__", 2) == 0 ||
236 strncmp (method_name
, "op", 2) == 0 ||
237 strncmp (method_name
, "type", 4) == 0)
239 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
240 method_name
= dem_opname
;
241 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
242 method_name
= dem_opname
;
245 if (strcmp_iw (name
, method_name
) == 0)
246 /* Find all the overloaded methods with that name. */
247 i1
+= add_matching_methods (method_counter
, t
, language
,
249 else if (strncmp (class_name
, name
, name_len
) == 0
250 && (class_name
[name_len
] == '\0'
251 || class_name
[name_len
] == '<'))
252 i1
+= add_constructors (method_counter
, t
, language
,
257 /* Only search baseclasses if there is no match yet, since names in
258 derived classes override those in baseclasses.
260 FIXME: The above is not true; it is only true of member functions
261 if they have the same number of arguments (??? - section 13.1 of the
262 ARM says the function members are not in the same scope but doesn't
263 really spell out the rules in a way I understand. In any case, if
264 the number of arguments differ this is a case in which we can overload
265 rather than hiding without any problem, and gcc 2.4.5 does overload
266 rather than hiding in this case). */
269 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
270 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
271 language
, sym_arr
+ i1
);
276 /* Add the symbols associated to methods of the class whose type is T
277 and whose name matches the method indexed by METHOD_COUNTER in the
278 array SYM_ARR. Return the number of methods added. */
281 add_matching_methods (int method_counter
, struct type
*t
,
282 enum language language
, struct symbol
**sym_arr
)
287 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
294 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
296 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
300 tmp_name
= gdb_mangle_name (t
,
303 phys_name
= alloca (strlen (tmp_name
) + 1);
304 strcpy (phys_name
, tmp_name
);
308 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
310 /* Destructor is handled by caller, don't add it to
312 if (is_destructor_name (phys_name
) != 0)
315 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
319 (struct symtab
**) NULL
);
324 /* This error message gets printed, but the method
325 still seems to be found
326 fputs_filtered("(Cannot find method ", gdb_stdout);
327 fprintf_symbol_filtered (gdb_stdout, phys_name,
329 DMGL_PARAMS | DMGL_ANSI);
330 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
338 /* Add the symbols associated to constructors of the class whose type
339 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
340 array SYM_ARR. Return the number of methods added. */
343 add_constructors (int method_counter
, struct type
*t
,
344 enum language language
, struct symbol
**sym_arr
)
349 /* For GCC 3.x and stabs, constructors and destructors
350 have names like __base_ctor and __complete_dtor.
351 Check the physname for now if we're looking for a
354 = TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
361 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
363 /* GCC 3.x will never produce stabs stub methods, so
364 we don't need to handle this case. */
365 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
367 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
368 if (! is_constructor_name (phys_name
))
371 /* If this method is actually defined, include it in the
373 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
377 (struct symtab
**) NULL
);
385 /* Helper function for decode_line_1.
386 Build a canonical line spec in CANONICAL if it is non-NULL and if
387 the SAL has a symtab.
388 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
389 If SYMNAME is NULL the line number from SAL is used and the canonical
390 line spec is `filename:linenum'. */
393 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
396 char **canonical_arr
;
397 char *canonical_name
;
399 struct symtab
*s
= sal
->symtab
;
401 if (s
== (struct symtab
*) NULL
402 || s
->filename
== (char *) NULL
403 || canonical
== (char ***) NULL
)
406 canonical_arr
= (char **) xmalloc (sizeof (char *));
407 *canonical
= canonical_arr
;
409 filename
= s
->filename
;
412 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
413 sprintf (canonical_name
, "%s:%s", filename
, symname
);
417 canonical_name
= xmalloc (strlen (filename
) + 30);
418 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
420 canonical_arr
[0] = canonical_name
;
425 /* Find an instance of the character C in the string S that is outside
426 of all parenthesis pairs, single-quoted strings, and double-quoted
427 strings. Also, ignore the char within a template name, like a ','
428 within foo<int, int>. */
431 find_toplevel_char (char *s
, char c
)
433 int quoted
= 0; /* zero if we're not in quotes;
434 '"' if we're in a double-quoted string;
435 '\'' if we're in a single-quoted string. */
436 int depth
= 0; /* Number of unclosed parens we've seen. */
439 for (scan
= s
; *scan
; scan
++)
445 else if (*scan
== '\\' && *(scan
+ 1))
448 else if (*scan
== c
&& ! quoted
&& depth
== 0)
450 else if (*scan
== '"' || *scan
== '\'')
452 else if (*scan
== '(' || *scan
== '<')
454 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
461 /* Determines if the gives string corresponds to an Objective-C method
462 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
463 are allowed to have spaces and parentheses in them. */
466 is_objc_method_format (const char *s
)
468 if (s
== NULL
|| *s
== '\0')
470 /* Handle arguments with the format FILENAME:SYMBOL. */
471 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
472 && (s
[2] == '[') && strchr(s
, ']'))
474 /* Handle arguments that are just SYMBOL. */
475 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
480 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
481 operate on (ask user if necessary).
482 If CANONICAL is non-NULL return a corresponding array of mangled names
483 as canonical line specs there. */
485 static struct symtabs_and_lines
486 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
489 struct symtabs_and_lines values
, return_values
;
494 struct cleanup
*old_chain
;
495 char **canonical_arr
= (char **) NULL
;
497 values
.sals
= (struct symtab_and_line
*)
498 alloca (nelts
* sizeof (struct symtab_and_line
));
499 return_values
.sals
= (struct symtab_and_line
*)
500 xmalloc (nelts
* sizeof (struct symtab_and_line
));
501 old_chain
= make_cleanup (xfree
, return_values
.sals
);
505 canonical_arr
= (char **) xmalloc (nelts
* sizeof (char *));
506 make_cleanup (xfree
, canonical_arr
);
507 memset (canonical_arr
, 0, nelts
* sizeof (char *));
508 *canonical
= canonical_arr
;
512 printf_unfiltered (_("[0] cancel\n[1] all\n"));
515 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
516 init_sal (&values
.sals
[i
]);
517 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
519 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
520 if (values
.sals
[i
].symtab
)
521 printf_unfiltered ("[%d] %s at %s:%d\n",
523 SYMBOL_PRINT_NAME (sym_arr
[i
]),
524 values
.sals
[i
].symtab
->filename
,
525 values
.sals
[i
].line
);
527 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"),
529 SYMBOL_PRINT_NAME (sym_arr
[i
]),
530 values
.sals
[i
].line
);
534 printf_unfiltered (_("?HERE\n"));
538 prompt
= getenv ("PS2");
543 args
= command_line_input (prompt
, 0, "overload-choice");
545 if (args
== 0 || *args
== 0)
546 error_no_arg (_("one or more choice numbers"));
554 while (*arg1
>= '0' && *arg1
<= '9')
556 if (*arg1
&& *arg1
!= ' ' && *arg1
!= '\t')
557 error (_("Arguments must be choice numbers."));
562 error (_("canceled"));
567 for (i
= 0; i
< nelts
; i
++)
569 if (canonical_arr
[i
] == NULL
)
571 symname
= DEPRECATED_SYMBOL_NAME (sym_arr
[i
]);
572 canonical_arr
[i
] = savestring (symname
, strlen (symname
));
576 memcpy (return_values
.sals
, values
.sals
,
577 (nelts
* sizeof (struct symtab_and_line
)));
578 return_values
.nelts
= nelts
;
579 discard_cleanups (old_chain
);
580 return return_values
;
583 if (num
>= nelts
+ 2)
585 printf_unfiltered (_("No choice number %d.\n"), num
);
590 if (values
.sals
[num
].pc
)
594 symname
= DEPRECATED_SYMBOL_NAME (sym_arr
[num
]);
595 make_cleanup (xfree
, symname
);
596 canonical_arr
[i
] = savestring (symname
, strlen (symname
));
598 return_values
.sals
[i
++] = values
.sals
[num
];
599 values
.sals
[num
].pc
= 0;
603 printf_unfiltered (_("duplicate request for %d ignored.\n"), num
);
608 while (*args
== ' ' || *args
== '\t')
611 return_values
.nelts
= i
;
612 discard_cleanups (old_chain
);
613 return return_values
;
616 /* The parser of linespec itself. */
618 /* Parse a string that specifies a line number.
619 Pass the address of a char * variable; that variable will be
620 advanced over the characters actually parsed.
624 LINENUM -- that line number in current file. PC returned is 0.
625 FILE:LINENUM -- that line in that file. PC returned is 0.
626 FUNCTION -- line number of openbrace of that function.
627 PC returned is the start of the function.
628 VARIABLE -- line number of definition of that variable.
630 FILE:FUNCTION -- likewise, but prefer functions in that file.
631 *EXPR -- line in which address EXPR appears.
633 This may all be followed by an "if EXPR", which we ignore.
635 FUNCTION may be an undebuggable function found in minimal symbol table.
637 If the argument FUNFIRSTLINE is nonzero, we want the first line
638 of real code inside a function when a function is specified, and it is
639 not OK to specify a variable or type to get its line number.
641 DEFAULT_SYMTAB specifies the file to use if none is specified.
642 It defaults to current_source_symtab.
643 DEFAULT_LINE specifies the line number to use for relative
644 line numbers (that start with signs). Defaults to current_source_line.
645 If CANONICAL is non-NULL, store an array of strings containing the canonical
646 line specs there if necessary. Currently overloaded member functions and
647 line numbers or static functions without a filename yield a canonical
648 line spec. The array and the line spec strings are allocated on the heap,
649 it is the callers responsibility to free them.
651 Note that it is possible to return zero for the symtab
652 if no file is validly specified. Callers must check that.
653 Also, the line number returned may be invalid.
655 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
656 on whether or not failure occurs due to an unknown function or file. In the case
657 where failure does occur due to an unknown function or file, do not issue an error
660 /* We allow single quotes in various places. This is a hideous
661 kludge, which exists because the completer can't yet deal with the
662 lack of single quotes. FIXME: write a linespec_completer which we
663 can use as appropriate instead of make_symbol_completion_list. */
665 struct symtabs_and_lines
666 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
667 int default_line
, char ***canonical
, int *not_found_ptr
)
671 /* If a file name is specified, this is its symtab. */
672 struct symtab
*file_symtab
= NULL
;
675 /* This is NULL if there are no parens in *ARGPTR, or a pointer to
676 the closing parenthesis if there are parens. */
678 /* This says whether or not something in *ARGPTR is quoted with
679 completer_quotes (i.e. with single quotes). */
681 /* Is part of *ARGPTR is enclosed in double quotes? */
682 int is_quote_enclosed
;
683 int is_objc_method
= 0;
684 char *saved_arg
= *argptr
;
689 /* Defaults have defaults. */
691 initialize_defaults (&default_symtab
, &default_line
);
693 /* See if arg is *PC. */
696 return decode_indirect (argptr
);
698 /* Set various flags. 'paren_pointer' is important for overload
699 checking, where we allow things like:
700 (gdb) break c::f(int)
703 set_flags (*argptr
, &is_quoted
, &paren_pointer
);
705 /* Check to see if it's a multipart linespec (with colons or
708 /* Locate the end of the first half of the linespec.
709 After the call, for instance, if the argptr string is "foo.c:123"
710 p will point at "123". If there is only one part, like "foo", p
711 will point to "". If this is a C++ name, like "A::B::foo", p will
712 point to "::B::foo". Argptr is not changed by this call. */
714 p
= locate_first_half (argptr
, &is_quote_enclosed
);
716 /* Check if this is an Objective-C method (anything that starts with
717 a '+' or '-' and a '['). */
718 if (is_objc_method_format (p
))
721 paren_pointer
= NULL
; /* Just a category name. Ignore it. */
724 /* Check if the symbol could be an Objective-C selector. */
727 struct symtabs_and_lines values
;
728 values
= decode_objc (argptr
, funfirstline
, NULL
,
729 canonical
, saved_arg
);
730 if (values
.sals
!= NULL
)
734 /* Does it look like there actually were two parts? */
736 if ((p
[0] == ':' || p
[0] == '.') && paren_pointer
== NULL
)
739 *argptr
= *argptr
+ 1;
741 /* Is it a C++ or Java compound data structure?
742 The check on p[1] == ':' is capturing the case of "::",
743 since p[0]==':' was checked above.
744 Note that the call to decode_compound does everything
745 for us, including the lookup on the symbol table, so we
748 if (p
[0] == '.' || p
[1] == ':')
749 return decode_compound (argptr
, funfirstline
, canonical
,
752 /* No, the first part is a filename; set s to be that file's
753 symtab. Also, move argptr past the filename. */
755 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
,
759 /* No one really seems to know why this was added. It certainly
760 breaks the command line, though, whenever the passed
761 name is of the form ClassName::Method. This bit of code
762 singles out the class name, and if funfirstline is set (for
763 example, you are setting a breakpoint at this function),
764 you get an error. This did not occur with earlier
765 verions, so I am ifdef'ing this out. 3/29/99 */
768 /* Check if what we have till now is a symbol name */
770 /* We may be looking at a template instantiation such
771 as "foo<int>". Check here whether we know about it,
772 instead of falling through to the code below which
773 handles ordinary function names, because that code
774 doesn't like seeing '<' and '>' in a name -- the
775 skip_quoted call doesn't go past them. So see if we
776 can figure it out right now. */
778 copy
= (char *) alloca (p
- *argptr
+ 1);
779 memcpy (copy
, *argptr
, p
- *argptr
);
780 copy
[p
- *argptr
] = '\000';
781 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
784 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
785 return symbol_found (funfirstline
, canonical
, copy
, sym
,
788 /* Otherwise fall out from here and go to file/line spec
793 /* S is specified file's symtab, or 0 if no file specified.
794 arg no longer contains the file name. */
796 /* Check whether arg is all digits (and sign). */
799 if (*q
== '-' || *q
== '+')
801 while (*q
>= '0' && *q
<= '9')
804 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
805 /* We found a token consisting of all digits -- at least one digit. */
806 return decode_all_digits (argptr
, default_symtab
, default_line
,
807 canonical
, file_symtab
, q
);
809 /* Arg token is not digits => try it as a variable name
810 Find the next token (everything up to end or next whitespace). */
812 if (**argptr
== '$') /* May be a convenience variable. */
813 /* One or two $ chars possible. */
814 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
817 p
= skip_quoted (*argptr
);
819 error (_("Unmatched single quote."));
821 else if (is_objc_method
)
823 /* allow word separators in method names for Obj-C */
824 p
= skip_quoted_chars (*argptr
, NULL
, "");
826 else if (paren_pointer
!= NULL
)
828 p
= paren_pointer
+ 1;
832 p
= skip_quoted (*argptr
);
835 copy
= (char *) alloca (p
- *argptr
+ 1);
836 memcpy (copy
, *argptr
, p
- *argptr
);
837 copy
[p
- *argptr
] = '\0';
840 && copy
[0] == copy
[p
- *argptr
- 1]
841 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
843 copy
[p
- *argptr
- 1] = '\0';
846 while (*p
== ' ' || *p
== '\t')
850 /* If it starts with $: may be a legitimate variable or routine name
851 (e.g. HP-UX millicode routines such as $$dyncall), or it may
852 be history value, or it may be a convenience variable. */
855 return decode_dollar (copy
, funfirstline
, default_symtab
,
856 canonical
, file_symtab
);
858 /* Look up that token as a variable.
859 If file specified, use that file's per-file block to start with. */
861 return decode_variable (copy
, funfirstline
, canonical
,
862 file_symtab
, not_found_ptr
);
867 /* Now, more helper functions for decode_line_1. Some conventions
868 that these functions follow:
870 Decode_line_1 typically passes along some of its arguments or local
871 variables to the subfunctions. It passes the variables by
872 reference if they are modified by the subfunction, and by value
875 Some of the functions have side effects that don't arise from
876 variables that are passed by reference. In particular, if a
877 function is passed ARGPTR as an argument, it modifies what ARGPTR
878 points to; typically, it advances *ARGPTR past whatever substring
879 it has just looked at. (If it doesn't modify *ARGPTR, then the
880 function gets passed *ARGPTR instead, which is then called ARG: see
881 set_flags, for example.) Also, functions that return a struct
882 symtabs_and_lines may modify CANONICAL, as in the description of
885 If a function returns a struct symtabs_and_lines, then that struct
886 will immediately make its way up the call chain to be returned by
887 decode_line_1. In particular, all of the functions decode_XXX
888 calculate the appropriate struct symtabs_and_lines, under the
889 assumption that their argument is of the form XXX. */
891 /* First, some functions to initialize stuff at the beggining of the
895 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
897 if (*default_symtab
== 0)
899 /* Use whatever we have for the default source line. We don't use
900 get_current_or_default_symtab_and_line as it can recurse and call
902 struct symtab_and_line cursal
=
903 get_current_source_symtab_and_line ();
905 *default_symtab
= cursal
.symtab
;
906 *default_line
= cursal
.line
;
911 set_flags (char *arg
, int *is_quoted
, char **paren_pointer
)
916 /* 'has_if' is for the syntax:
917 (gdb) break foo if (a==b)
919 if ((ii
= strstr (arg
, " if ")) != NULL
||
920 (ii
= strstr (arg
, "\tif ")) != NULL
||
921 (ii
= strstr (arg
, " if\t")) != NULL
||
922 (ii
= strstr (arg
, "\tif\t")) != NULL
||
923 (ii
= strstr (arg
, " if(")) != NULL
||
924 (ii
= strstr (arg
, "\tif( ")) != NULL
)
926 /* Temporarily zap out "if (condition)" to not confuse the
927 parenthesis-checking code below. This is undone below. Do not
935 && strchr (get_gdb_completer_quote_characters (),
938 *paren_pointer
= strchr (arg
, '(');
939 if (*paren_pointer
!= NULL
)
940 *paren_pointer
= strrchr (*paren_pointer
, ')');
942 /* Now that we're safely past the paren_pointer check, put back " if
943 (condition)" so outer layers can see it. */
950 /* Decode arg of the form *PC. */
952 static struct symtabs_and_lines
953 decode_indirect (char **argptr
)
955 struct symtabs_and_lines values
;
959 pc
= parse_and_eval_address_1 (argptr
);
961 values
.sals
= (struct symtab_and_line
*)
962 xmalloc (sizeof (struct symtab_and_line
));
965 values
.sals
[0] = find_pc_line (pc
, 0);
966 values
.sals
[0].pc
= pc
;
967 values
.sals
[0].section
= find_pc_overlay (pc
);
974 /* Locate the first half of the linespec, ending in a colon, period,
975 or whitespace. (More or less.) Also, check to see if *ARGPTR is
976 enclosed in double quotes; if so, set is_quote_enclosed, advance
977 ARGPTR past that and zero out the trailing double quote.
978 If ARGPTR is just a simple name like "main", p will point to ""
982 locate_first_half (char **argptr
, int *is_quote_enclosed
)
988 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
989 and we must isolate the first half. Outer layers will call again later
992 Don't count commas that appear in argument lists of overloaded
993 functions, or in quoted strings. It's stupid to go to this much
994 trouble when the rest of the function is such an obvious roach hotel. */
995 ii
= find_toplevel_char (*argptr
, ',');
996 has_comma
= (ii
!= 0);
998 /* Temporarily zap out second half to not confuse the code below.
999 This is undone below. Do not change ii!! */
1005 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1006 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1012 *is_quote_enclosed
= 1;
1017 *is_quote_enclosed
= 0;
1022 char *temp_end
= find_template_name_end (p
);
1024 error (_("malformed template specification in command"));
1027 /* Check for a colon and a plus or minus and a [ (which
1028 indicates an Objective-C method) */
1029 if (is_objc_method_format (p
))
1033 /* Check for the end of the first half of the linespec. End of
1034 line, a tab, a double colon or the last single colon, or a
1035 space. But if enclosed in double quotes we do not break on
1040 && ((p
[1] == ':') || (strchr (p
+ 1, ':') == NULL
)))
1041 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1043 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1045 /* Java qualified method. Find the *last* '.', since the
1046 others are package qualifiers. */
1047 for (p1
= p
; *p1
; p1
++)
1055 while (p
[0] == ' ' || p
[0] == '\t')
1058 /* If the closing double quote was left at the end, remove it. */
1059 if (*is_quote_enclosed
)
1061 char *closing_quote
= strchr (p
- 1, '"');
1062 if (closing_quote
&& closing_quote
[1] == '\0')
1063 *closing_quote
= '\0';
1066 /* Now that we've safely parsed the first half, put back ',' so
1067 outer layers can see it. */
1076 /* Here's where we recognise an Objective-C Selector. An Objective C
1077 selector may be implemented by more than one class, therefore it
1078 may represent more than one method/function. This gives us a
1079 situation somewhat analogous to C++ overloading. If there's more
1080 than one method that could represent the selector, then use some of
1081 the existing C++ code to let the user choose one. */
1083 struct symtabs_and_lines
1084 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1085 char ***canonical
, char *saved_arg
)
1087 struct symtabs_and_lines values
;
1088 struct symbol
**sym_arr
= NULL
;
1089 struct symbol
*sym
= NULL
;
1091 struct block
*block
= NULL
;
1098 if (file_symtab
!= NULL
)
1099 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
), STATIC_BLOCK
);
1101 block
= get_selected_block (0);
1103 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1107 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1110 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1114 /* i1 now represents the TOTAL number of matches found.
1115 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1116 which will come first in the sym_arr array. Any low-level
1117 (minimal_symbol) matches will follow those. */
1123 /* Already a struct symbol. */
1128 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1129 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1131 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1136 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1139 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1141 /* Canonicalize this, so it remains resolved for dylib loads. */
1142 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1143 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1147 /* The only match was a non-debuggable symbol. */
1148 values
.sals
[0].symtab
= 0;
1149 values
.sals
[0].line
= 0;
1150 values
.sals
[0].end
= 0;
1151 values
.sals
[0].pc
= SYMBOL_VALUE_ADDRESS (sym_arr
[0]);
1158 /* More than one match. The user must choose one or more. */
1159 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1165 /* This handles C++ and Java compound data structures. P should point
1166 at the first component separator, i.e. double-colon or period. As
1167 an example, on entrance to this function we could have ARGPTR
1168 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1170 static struct symtabs_and_lines
1171 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1172 char *saved_arg
, char *p
)
1174 struct symtabs_and_lines values
;
1176 char *saved_arg2
= *argptr
;
1179 /* The symtab that SYM was found in. */
1180 struct symtab
*sym_symtab
;
1182 struct symbol
*sym_class
;
1183 struct symbol
**sym_arr
;
1186 /* First check for "global" namespace specification, of the form
1187 "::foo". If found, skip over the colons and jump to normal
1188 symbol processing. I.e. the whole line specification starts with
1189 "::" (note the condition that *argptr == p). */
1191 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1194 /* Given our example "AAA::inA::fun", we have two cases to consider:
1196 1) AAA::inA is the name of a class. In that case, presumably it
1197 has a method called "fun"; we then look up that method using
1200 2) AAA::inA isn't the name of a class. In that case, either the
1201 user made a typo or AAA::inA is the name of a namespace.
1202 Either way, we just look up AAA::inA::fun with lookup_symbol.
1204 Thus, our first task is to find everything before the last set of
1205 double-colons and figure out if it's the name of a class. So we
1206 first loop through all of the double-colons. */
1208 p2
= p
; /* Save for restart. */
1210 /* This is very messy. Following the example above we have now the
1213 argptr -> "AAA::inA::fun
1214 saved_arg -> "AAA::inA::fun
1215 saved_arg2 -> "AAA::inA::fun
1216 p2 -> "::inA::fun". */
1218 /* In the loop below, with these strings, we'll make 2 passes, each
1219 is marked in comments.*/
1223 /* Move pointer up to next possible class/namespace token. */
1225 p
= p2
+ 1; /* Restart with old value +1. */
1227 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1228 i.e. if there is a double-colon, p will now point to the
1230 /* PASS2: p2->"::fun", p->":fun" */
1232 /* Move pointer ahead to next double-colon. */
1233 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\''))
1237 temp_end
= find_template_name_end (p
);
1239 error (_("malformed template specification in command"));
1242 /* Note that, since, at the start of this loop, p would be
1243 pointing to the second colon in a double-colon, we only
1244 satisfy the condition below if there is another
1245 double-colon to the right (after). I.e. there is another
1246 component that can be a class or a namespace. I.e, if at
1247 the beginning of this loop (PASS1), we had
1248 p->":inA::fun", we'll trigger this when p has been
1249 advanced to point to "::fun". */
1250 /* PASS2: we will not trigger this. */
1251 else if ((p
[0] == ':') && (p
[1] == ':'))
1252 break; /* Found double-colon. */
1254 /* PASS2: We'll keep getting here, until p->"", at which point
1255 we exit this loop. */
1260 break; /* Out of the while (1). This would happen
1261 for instance if we have looked up
1262 unsuccessfully all the components of the
1263 string, and p->""(PASS2) */
1265 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1267 /* Save restart for next time around. */
1269 /* Restore argptr as it was on entry to this function. */
1270 *argptr
= saved_arg2
;
1271 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1274 /* All ready for next pass through the loop. */
1278 /* Start of lookup in the symbol tables. */
1280 /* Lookup in the symbol table the substring between argptr and
1281 p. Note, this call changes the value of argptr. */
1282 /* Before the call, argptr->"AAA::inA::fun",
1283 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1285 sym_class
= lookup_prefix_sym (argptr
, p2
);
1287 /* If sym_class has been found, and if "AAA::inA" is a class, then
1288 we're in case 1 above. So we look up "fun" as a method of that
1291 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1292 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1293 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1295 /* Arg token is not digits => try it as a function name.
1296 Find the next token (everything up to end or next
1299 && strchr (get_gdb_completer_quote_characters (),
1302 p
= skip_quoted (*argptr
);
1303 *argptr
= *argptr
+ 1;
1307 /* At this point argptr->"fun". */
1309 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':')
1311 /* At this point p->"". String ended. */
1314 /* Allocate our own copy of the substring between argptr and
1316 copy
= (char *) alloca (p
- *argptr
+ 1);
1317 memcpy (copy
, *argptr
, p
- *argptr
);
1318 copy
[p
- *argptr
] = '\0';
1320 && copy
[p
- *argptr
- 1]
1321 && strchr (get_gdb_completer_quote_characters (),
1322 copy
[p
- *argptr
- 1]) != NULL
)
1323 copy
[p
- *argptr
- 1] = '\0';
1325 /* At this point copy->"fun", p->"" */
1327 /* No line number may be specified. */
1328 while (*p
== ' ' || *p
== '\t')
1331 /* At this point arptr->"". */
1333 /* Look for copy as a method of sym_class. */
1334 /* At this point copy->"fun", sym_class is "AAA:inA",
1335 saved_arg->"AAA::inA::fun". This concludes the scanning of
1336 the string for possible components matches. If we find it
1337 here, we return. If not, and we are at the and of the string,
1338 we'll lookup the whole string in the symbol tables. */
1340 return find_method (funfirstline
, canonical
, saved_arg
,
1341 copy
, t
, sym_class
);
1343 } /* End if symbol found */
1346 /* We couldn't find a class, so we're in case 2 above. We check the
1347 entire name as a symbol instead. */
1349 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1350 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1351 /* Note: if is_quoted should be true, we snuff out quote here
1353 copy
[p
- saved_arg2
] = '\000';
1354 /* Set argptr to skip over the name. */
1355 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1357 /* Look up entire name */
1358 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
1360 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1363 /* Couldn't find any interpretation as classes/namespaces, so give
1364 up. The quotes are important if copy is empty. */
1365 cplusplus_error (saved_arg
,
1366 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1370 /* Next come some helper functions for decode_compound. */
1372 /* Return the symbol corresponding to the substring of *ARGPTR ending
1373 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1374 name in question, the compound object separator ("::" or "."), and
1375 whitespace. Note that *ARGPTR is changed whether or not the
1376 lookup_symbol call finds anything (i.e we return NULL). As an
1377 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1379 static struct symbol
*
1380 lookup_prefix_sym (char **argptr
, char *p
)
1385 /* Extract the class name. */
1387 while (p
!= *argptr
&& p
[-1] == ' ')
1389 copy
= (char *) alloca (p
- *argptr
+ 1);
1390 memcpy (copy
, *argptr
, p
- *argptr
);
1391 copy
[p
- *argptr
] = 0;
1393 /* Discard the class name from the argptr. */
1394 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1395 while (*p
== ' ' || *p
== '\t')
1399 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1400 argptr->"inA::fun" */
1402 return lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0,
1403 (struct symtab
**) NULL
);
1406 /* This finds the method COPY in the class whose type is T and whose
1407 symbol is SYM_CLASS. */
1409 static struct symtabs_and_lines
1410 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1411 char *copy
, struct type
*t
, struct symbol
*sym_class
)
1413 struct symtabs_and_lines values
;
1414 struct symbol
*sym
= 0;
1415 int i1
; /* Counter for the symbol array. */
1416 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1417 * sizeof (struct symbol
*));
1419 /* Find all methods with a matching name, and put them in
1422 i1
= collect_methods (copy
, t
, sym_class
, sym_arr
);
1426 /* There is exactly one field with that name. */
1429 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1431 values
.sals
= (struct symtab_and_line
*)
1432 xmalloc (sizeof (struct symtab_and_line
));
1434 values
.sals
[0] = find_function_start_sal (sym
,
1446 /* There is more than one field with that name
1447 (overloaded). Ask the user which one to use. */
1448 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1454 if (is_operator_name (copy
))
1456 tmp
= (char *) alloca (strlen (copy
+ 3) + 9);
1457 strcpy (tmp
, "operator ");
1458 strcat (tmp
, copy
+ 3);
1463 cplusplus_error (saved_arg
,
1464 "the class `%s' does not have destructor defined\n",
1465 SYMBOL_PRINT_NAME (sym_class
));
1467 cplusplus_error (saved_arg
,
1468 "the class %s does not have any method named %s\n",
1469 SYMBOL_PRINT_NAME (sym_class
), tmp
);
1473 /* Find all methods named COPY in the class whose type is T, and put
1474 them in SYM_ARR. Return the number of methods found. */
1477 collect_methods (char *copy
, struct type
*t
,
1478 struct symbol
*sym_class
, struct symbol
**sym_arr
)
1480 int i1
= 0; /* Counter for the symbol array. */
1482 if (destructor_name_p (copy
, t
))
1484 /* Destructors are a special case. */
1485 int m_index
, f_index
;
1487 if (get_destructor_fn_field (t
, &m_index
, &f_index
))
1489 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (t
, m_index
);
1492 lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f
, f_index
),
1493 NULL
, VAR_DOMAIN
, (int *) NULL
,
1494 (struct symtab
**) NULL
);
1500 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1507 /* Return the symtab associated to the filename given by the substring
1508 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1509 NOT_FOUND_PTR is not null and the source file is not found, store
1510 boolean true at the location pointed to and do not issue an
1513 static struct symtab
*
1514 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1519 struct symtab
*file_symtab
;
1522 while (p
!= *argptr
&& p
[-1] == ' ')
1524 if ((*p
== '"') && is_quote_enclosed
)
1526 copy
= (char *) alloca (p
- *argptr
+ 1);
1527 memcpy (copy
, *argptr
, p
- *argptr
);
1528 /* It may have the ending quote right after the file name. */
1529 if (is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1530 copy
[p
- *argptr
- 1] = 0;
1532 copy
[p
- *argptr
] = 0;
1534 /* Find that file's data. */
1535 file_symtab
= lookup_symtab (copy
);
1536 if (file_symtab
== 0)
1538 if (!have_full_symbols () && !have_partial_symbols ())
1539 error (_("No symbol table is loaded. Use the \"file\" command."));
1542 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1545 /* Discard the file name from the arg. */
1547 while (*p
== ' ' || *p
== '\t')
1556 /* This decodes a line where the argument is all digits (possibly
1557 preceded by a sign). Q should point to the end of those digits;
1558 the other arguments are as usual. */
1560 static struct symtabs_and_lines
1561 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1562 int default_line
, char ***canonical
,
1563 struct symtab
*file_symtab
, char *q
)
1566 struct symtabs_and_lines values
;
1567 struct symtab_and_line val
;
1575 /* We might need a canonical line spec if no file was specified. */
1576 int need_canonical
= (file_symtab
== 0) ? 1 : 0;
1580 /* This is where we need to make sure that we have good defaults.
1581 We must guarantee that this section of code is never executed
1582 when we are called with just a function name, since
1583 set_default_source_symtab_and_line uses
1584 select_source_symtab that calls us with such an argument. */
1586 if (file_symtab
== 0 && default_symtab
== 0)
1588 /* Make sure we have at least a default source file. */
1589 set_default_source_symtab_and_line ();
1590 initialize_defaults (&default_symtab
, &default_line
);
1593 if (**argptr
== '+')
1594 sign
= plus
, (*argptr
)++;
1595 else if (**argptr
== '-')
1596 sign
= minus
, (*argptr
)++;
1597 val
.line
= atoi (*argptr
);
1603 if (file_symtab
== 0)
1604 val
.line
= default_line
+ val
.line
;
1609 if (file_symtab
== 0)
1610 val
.line
= default_line
- val
.line
;
1615 break; /* No need to adjust val.line. */
1618 while (*q
== ' ' || *q
== '\t')
1621 if (file_symtab
== 0)
1622 file_symtab
= default_symtab
;
1624 /* It is possible that this source file has more than one symtab,
1625 and that the new line number specification has moved us from the
1626 default (in file_symtab) to a new one. */
1627 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1628 if (val
.symtab
== 0)
1629 val
.symtab
= file_symtab
;
1632 values
.sals
= (struct symtab_and_line
*)
1633 xmalloc (sizeof (struct symtab_and_line
));
1634 values
.sals
[0] = val
;
1637 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1643 /* Decode a linespec starting with a dollar sign. */
1645 static struct symtabs_and_lines
1646 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1647 char ***canonical
, struct symtab
*file_symtab
)
1651 int need_canonical
= 0;
1652 struct symtabs_and_lines values
;
1653 struct symtab_and_line val
;
1656 /* The symtab that SYM was found in. */
1657 struct symtab
*sym_symtab
;
1658 struct minimal_symbol
*msymbol
;
1660 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1661 while (*p
>= '0' && *p
<= '9')
1663 if (!*p
) /* Reached end of token without hitting non-digit. */
1665 /* We have a value history reference. */
1666 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1667 valx
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1668 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1669 error (_("History values used in line specs must have integer values."));
1673 /* Not all digits -- may be user variable/function or a
1674 convenience variable. */
1676 /* Look up entire name as a symbol first. */
1677 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
1678 file_symtab
= (struct symtab
*) 0;
1680 /* Symbol was found --> jump to normal symbol processing. */
1682 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1685 /* If symbol was not found, look in minimal symbol tables. */
1686 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1687 /* Min symbol was found --> jump to minsym processing. */
1689 return minsym_found (funfirstline
, msymbol
);
1691 /* Not a user variable or function -- must be convenience variable. */
1692 need_canonical
= (file_symtab
== 0) ? 1 : 0;
1693 valx
= value_of_internalvar (lookup_internalvar (copy
+ 1));
1694 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1695 error (_("Convenience variables used in line specs must have integer values."));
1700 /* Either history value or convenience value from above, in valx. */
1701 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
1702 val
.line
= value_as_long (valx
);
1705 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
1706 values
.sals
[0] = val
;
1710 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1717 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1718 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1719 the function cannot be found, store boolean true in the location pointed to
1720 and do not issue an error message. */
1722 static struct symtabs_and_lines
1723 decode_variable (char *copy
, int funfirstline
, char ***canonical
,
1724 struct symtab
*file_symtab
, int *not_found_ptr
)
1727 /* The symtab that SYM was found in. */
1728 struct symtab
*sym_symtab
;
1730 struct minimal_symbol
*msymbol
;
1732 sym
= lookup_symbol (copy
,
1734 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1736 : get_selected_block (0)),
1737 VAR_DOMAIN
, 0, &sym_symtab
);
1740 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1741 file_symtab
, sym_symtab
);
1743 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1745 if (msymbol
!= NULL
)
1746 return minsym_found (funfirstline
, msymbol
);
1748 if (!have_full_symbols () &&
1749 !have_partial_symbols () && !have_minimal_symbols ())
1750 error (_("No symbol table is loaded. Use the \"file\" command."));
1754 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1760 /* Now come some functions that are called from multiple places within
1763 /* We've found a symbol SYM to associate with our linespec; build a
1764 corresponding struct symtabs_and_lines. */
1766 static struct symtabs_and_lines
1767 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1768 struct symbol
*sym
, struct symtab
*file_symtab
,
1769 struct symtab
*sym_symtab
)
1771 struct symtabs_and_lines values
;
1773 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1775 /* Arg is the name of a function */
1776 values
.sals
= (struct symtab_and_line
*)
1777 xmalloc (sizeof (struct symtab_and_line
));
1778 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1781 /* Don't use the SYMBOL_LINE; if used at all it points to
1782 the line containing the parameters or thereabouts, not
1783 the first line of code. */
1785 /* We might need a canonical line spec if it is a static
1787 if (file_symtab
== 0)
1789 struct blockvector
*bv
= BLOCKVECTOR (sym_symtab
);
1790 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1791 if (lookup_block_symbol (b
, copy
, NULL
, VAR_DOMAIN
) != NULL
)
1792 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1799 error (_("\"%s\" is not a function"), copy
);
1800 else if (SYMBOL_LINE (sym
) != 0)
1802 /* We know its line number. */
1803 values
.sals
= (struct symtab_and_line
*)
1804 xmalloc (sizeof (struct symtab_and_line
));
1806 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1807 values
.sals
[0].symtab
= sym_symtab
;
1808 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1812 /* This can happen if it is compiled with a compiler which doesn't
1813 put out line numbers for variables. */
1814 /* FIXME: Shouldn't we just set .line and .symtab to zero
1815 and return? For example, "info line foo" could print
1817 error (_("Line number not known for symbol \"%s\""), copy
);
1821 /* We've found a minimal symbol MSYMBOL to associate with our
1822 linespec; build a corresponding struct symtabs_and_lines. */
1824 static struct symtabs_and_lines
1825 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1827 struct symtabs_and_lines values
;
1829 values
.sals
= (struct symtab_and_line
*)
1830 xmalloc (sizeof (struct symtab_and_line
));
1831 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1832 (struct bfd_section
*) 0, 0);
1833 values
.sals
[0].section
= SYMBOL_BFD_SECTION (msymbol
);
1837 += gdbarch_deprecated_function_start_offset (current_gdbarch
);
1838 values
.sals
[0].pc
= gdbarch_skip_prologue
1839 (current_gdbarch
, values
.sals
[0].pc
);
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