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 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 "parser-defs.h"
35 #include "objc-lang.h"
37 #include "exceptions.h"
40 #include "mi/mi-cmds.h"
43 /* We share this one with symtab.c, but it is not exported widely. */
45 extern char *operator_chars (char *, char **);
47 /* Prototypes for local functions */
49 static void initialize_defaults (struct symtab
**default_symtab
,
52 static void set_flags (char *arg
, int *is_quoted
, char **paren_pointer
);
54 static struct symtabs_and_lines
decode_indirect (char **argptr
);
56 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
58 static struct symtabs_and_lines
decode_objc (char **argptr
,
60 struct symtab
*file_symtab
,
64 static struct symtabs_and_lines
decode_compound (char **argptr
,
70 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
72 static struct symtabs_and_lines
find_method (int funfirstline
,
77 struct symbol
*sym_class
);
79 static int collect_methods (char *copy
, struct type
*t
,
80 struct symbol
*sym_class
,
81 struct symbol
**sym_arr
);
83 static NORETURN
void cplusplus_error (const char *name
,
85 ATTR_NORETURN
ATTR_FORMAT (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
**);
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
*,
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
*[],
110 static struct symtab
*symtab_from_filename (char **argptr
,
111 char *p
, int is_quote_enclosed
,
115 symtabs_and_lines
decode_all_digits (char **argptr
,
116 struct symtab
*default_symtab
,
119 struct symtab
*file_symtab
,
122 static struct symtabs_and_lines
decode_dollar (char *copy
,
124 struct symtab
*default_symtab
,
126 struct symtab
*file_symtab
);
128 static struct symtabs_and_lines
decode_variable (char *copy
,
131 struct symtab
*file_symtab
,
135 symtabs_and_lines
symbol_found (int funfirstline
,
139 struct symtab
*file_symtab
);
142 symtabs_and_lines
minsym_found (int funfirstline
,
143 struct minimal_symbol
*msymbol
);
145 /* Helper functions. */
147 /* Issue a helpful hint on using the command completion feature on
148 single quoted demangled C++ symbols as part of the completion
152 cplusplus_error (const char *name
, const char *fmt
, ...)
154 struct ui_file
*tmp_stream
;
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
)))
219 int name_len
= strlen (name
);
223 /* Loop over each method name. At this level, all overloads of a name
224 are counted as a single name. There is an inner loop which loops over
227 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
231 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
234 if (strncmp (method_name
, "__", 2) == 0 ||
235 strncmp (method_name
, "op", 2) == 0 ||
236 strncmp (method_name
, "type", 4) == 0)
238 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
239 method_name
= dem_opname
;
240 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
241 method_name
= dem_opname
;
244 if (strcmp_iw (name
, method_name
) == 0)
245 /* Find all the overloaded methods with that name. */
246 i1
+= add_matching_methods (method_counter
, t
, language
,
248 else if (strncmp (class_name
, name
, name_len
) == 0
249 && (class_name
[name_len
] == '\0'
250 || class_name
[name_len
] == '<'))
251 i1
+= add_constructors (method_counter
, t
, language
,
256 /* Only search baseclasses if there is no match yet, since names in
257 derived classes override those in baseclasses.
259 FIXME: The above is not true; it is only true of member functions
260 if they have the same number of arguments (??? - section 13.1 of the
261 ARM says the function members are not in the same scope but doesn't
262 really spell out the rules in a way I understand. In any case, if
263 the number of arguments differ this is a case in which we can overload
264 rather than hiding without any problem, and gcc 2.4.5 does overload
265 rather than hiding in this case). */
268 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
269 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
270 language
, sym_arr
+ i1
);
275 /* Add the symbols associated to methods of the class whose type is T
276 and whose name matches the method indexed by METHOD_COUNTER in the
277 array SYM_ARR. Return the number of methods added. */
280 add_matching_methods (int method_counter
, struct type
*t
,
281 enum language language
, struct symbol
**sym_arr
)
286 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
293 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
295 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
299 tmp_name
= gdb_mangle_name (t
,
302 phys_name
= alloca (strlen (tmp_name
) + 1);
303 strcpy (phys_name
, tmp_name
);
307 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
309 /* Destructor is handled by caller, don't add it to
311 if (is_destructor_name (phys_name
) != 0)
314 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
322 /* This error message gets printed, but the method
323 still seems to be found
324 fputs_filtered("(Cannot find method ", gdb_stdout);
325 fprintf_symbol_filtered (gdb_stdout, phys_name,
327 DMGL_PARAMS | DMGL_ANSI);
328 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
336 /* Add the symbols associated to constructors of the class whose type
337 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
338 array SYM_ARR. Return the number of methods added. */
341 add_constructors (int method_counter
, struct type
*t
,
342 enum language language
, struct symbol
**sym_arr
)
347 /* For GCC 3.x and stabs, constructors and destructors
348 have names like __base_ctor and __complete_dtor.
349 Check the physname for now if we're looking for a
352 = TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
359 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
361 /* GCC 3.x will never produce stabs stub methods, so
362 we don't need to handle this case. */
363 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
365 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
366 if (! is_constructor_name (phys_name
))
369 /* If this method is actually defined, include it in the
371 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
382 /* Helper function for decode_line_1.
383 Build a canonical line spec in CANONICAL if it is non-NULL and if
384 the SAL has a symtab.
385 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
386 If SYMNAME is NULL the line number from SAL is used and the canonical
387 line spec is `filename:linenum'. */
390 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
393 char **canonical_arr
;
394 char *canonical_name
;
396 struct symtab
*s
= sal
->symtab
;
398 if (s
== (struct symtab
*) NULL
399 || s
->filename
== (char *) NULL
400 || canonical
== (char ***) NULL
)
403 canonical_arr
= (char **) xmalloc (sizeof (char *));
404 *canonical
= canonical_arr
;
406 filename
= s
->filename
;
409 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
410 sprintf (canonical_name
, "%s:%s", filename
, symname
);
414 canonical_name
= xmalloc (strlen (filename
) + 30);
415 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
417 canonical_arr
[0] = canonical_name
;
422 /* Find an instance of the character C in the string S that is outside
423 of all parenthesis pairs, single-quoted strings, and double-quoted
424 strings. Also, ignore the char within a template name, like a ','
425 within foo<int, int>. */
428 find_toplevel_char (char *s
, char c
)
430 int quoted
= 0; /* zero if we're not in quotes;
431 '"' if we're in a double-quoted string;
432 '\'' if we're in a single-quoted string. */
433 int depth
= 0; /* Number of unclosed parens we've seen. */
436 for (scan
= s
; *scan
; scan
++)
442 else if (*scan
== '\\' && *(scan
+ 1))
445 else if (*scan
== c
&& ! quoted
&& depth
== 0)
447 else if (*scan
== '"' || *scan
== '\'')
449 else if (*scan
== '(' || *scan
== '<')
451 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
458 /* Determines if the gives string corresponds to an Objective-C method
459 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
460 are allowed to have spaces and parentheses in them. */
463 is_objc_method_format (const char *s
)
465 if (s
== NULL
|| *s
== '\0')
467 /* Handle arguments with the format FILENAME:SYMBOL. */
468 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
469 && (s
[2] == '[') && strchr(s
, ']'))
471 /* Handle arguments that are just SYMBOL. */
472 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
477 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
478 operate on (ask user if necessary).
479 If CANONICAL is non-NULL return a corresponding array of mangled names
480 as canonical line specs there. */
482 static struct symtabs_and_lines
483 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
486 struct symtabs_and_lines values
, return_values
;
491 struct cleanup
*old_chain
;
492 char **canonical_arr
= (char **) NULL
;
493 const char *select_mode
= multiple_symbols_select_mode ();
495 if (select_mode
== multiple_symbols_cancel
)
497 canceled because the command is ambiguous\n\
498 See set/show multiple-symbol."));
500 values
.sals
= (struct symtab_and_line
*)
501 alloca (nelts
* sizeof (struct symtab_and_line
));
502 return_values
.sals
= (struct symtab_and_line
*)
503 xmalloc (nelts
* sizeof (struct symtab_and_line
));
504 old_chain
= make_cleanup (xfree
, return_values
.sals
);
508 canonical_arr
= (char **) xmalloc (nelts
* sizeof (char *));
509 make_cleanup (xfree
, canonical_arr
);
510 memset (canonical_arr
, 0, nelts
* sizeof (char *));
511 *canonical
= canonical_arr
;
517 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
518 init_sal (&values
.sals
[i
]);
519 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
520 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
524 /* If select_mode is "all", then do not print the multiple-choice
525 menu and act as if the user had chosen choice "1" (all). */
526 if (select_mode
== multiple_symbols_all
527 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
532 printf_unfiltered (_("[0] cancel\n[1] all\n"));
535 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
537 if (values
.sals
[i
].symtab
)
538 printf_unfiltered ("[%d] %s at %s:%d\n",
540 SYMBOL_PRINT_NAME (sym_arr
[i
]),
541 values
.sals
[i
].symtab
->filename
,
542 values
.sals
[i
].line
);
544 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"),
546 SYMBOL_PRINT_NAME (sym_arr
[i
]),
547 values
.sals
[i
].line
);
551 printf_unfiltered (_("?HERE\n"));
555 prompt
= getenv ("PS2");
560 args
= command_line_input (prompt
, 0, "overload-choice");
563 if (args
== 0 || *args
== 0)
564 error_no_arg (_("one or more choice numbers"));
572 while (*arg1
>= '0' && *arg1
<= '9')
574 if (*arg1
&& *arg1
!= ' ' && *arg1
!= '\t')
575 error (_("Arguments must be choice numbers."));
580 error (_("canceled"));
585 for (i
= 0; i
< nelts
; i
++)
587 if (canonical_arr
[i
] == NULL
)
589 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[i
]);
590 canonical_arr
[i
] = savestring (symname
, strlen (symname
));
594 memcpy (return_values
.sals
, values
.sals
,
595 (nelts
* sizeof (struct symtab_and_line
)));
596 return_values
.nelts
= nelts
;
597 discard_cleanups (old_chain
);
598 return return_values
;
601 if (num
>= nelts
+ 2)
603 printf_unfiltered (_("No choice number %d.\n"), num
);
608 if (values
.sals
[num
].pc
)
612 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[num
]);
613 make_cleanup (xfree
, symname
);
614 canonical_arr
[i
] = savestring (symname
, strlen (symname
));
616 return_values
.sals
[i
++] = values
.sals
[num
];
617 values
.sals
[num
].pc
= 0;
621 printf_unfiltered (_("duplicate request for %d ignored.\n"), num
);
626 while (*args
== ' ' || *args
== '\t')
629 return_values
.nelts
= i
;
630 discard_cleanups (old_chain
);
631 return return_values
;
634 /* The parser of linespec itself. */
636 /* Parse a string that specifies a line number.
637 Pass the address of a char * variable; that variable will be
638 advanced over the characters actually parsed.
642 LINENUM -- that line number in current file. PC returned is 0.
643 FILE:LINENUM -- that line in that file. PC returned is 0.
644 FUNCTION -- line number of openbrace of that function.
645 PC returned is the start of the function.
646 VARIABLE -- line number of definition of that variable.
648 FILE:FUNCTION -- likewise, but prefer functions in that file.
649 *EXPR -- line in which address EXPR appears.
651 This may all be followed by an "if EXPR", which we ignore.
653 FUNCTION may be an undebuggable function found in minimal symbol table.
655 If the argument FUNFIRSTLINE is nonzero, we want the first line
656 of real code inside a function when a function is specified, and it is
657 not OK to specify a variable or type to get its line number.
659 DEFAULT_SYMTAB specifies the file to use if none is specified.
660 It defaults to current_source_symtab.
661 DEFAULT_LINE specifies the line number to use for relative
662 line numbers (that start with signs). Defaults to current_source_line.
663 If CANONICAL is non-NULL, store an array of strings containing the canonical
664 line specs there if necessary. Currently overloaded member functions and
665 line numbers or static functions without a filename yield a canonical
666 line spec. The array and the line spec strings are allocated on the heap,
667 it is the callers responsibility to free them.
669 Note that it is possible to return zero for the symtab
670 if no file is validly specified. Callers must check that.
671 Also, the line number returned may be invalid.
673 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
674 on whether or not failure occurs due to an unknown function or file. In the case
675 where failure does occur due to an unknown function or file, do not issue an error
678 /* We allow single quotes in various places. This is a hideous
679 kludge, which exists because the completer can't yet deal with the
680 lack of single quotes. FIXME: write a linespec_completer which we
681 can use as appropriate instead of make_symbol_completion_list. */
683 struct symtabs_and_lines
684 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
685 int default_line
, char ***canonical
, int *not_found_ptr
)
689 /* If a file name is specified, this is its symtab. */
690 struct symtab
*file_symtab
= NULL
;
693 /* This is NULL if there are no parens in *ARGPTR, or a pointer to
694 the closing parenthesis if there are parens. */
696 /* This says whether or not something in *ARGPTR is quoted with
697 completer_quotes (i.e. with single quotes). */
699 /* Is part of *ARGPTR is enclosed in double quotes? */
700 int is_quote_enclosed
;
701 int is_objc_method
= 0;
702 char *saved_arg
= *argptr
;
707 /* Defaults have defaults. */
709 initialize_defaults (&default_symtab
, &default_line
);
711 /* See if arg is *PC. */
714 return decode_indirect (argptr
);
716 /* Set various flags. 'paren_pointer' is important for overload
717 checking, where we allow things like:
718 (gdb) break c::f(int)
721 set_flags (*argptr
, &is_quoted
, &paren_pointer
);
723 /* Check to see if it's a multipart linespec (with colons or
726 /* Locate the end of the first half of the linespec.
727 After the call, for instance, if the argptr string is "foo.c:123"
728 p will point at "123". If there is only one part, like "foo", p
729 will point to "". If this is a C++ name, like "A::B::foo", p will
730 point to "::B::foo". Argptr is not changed by this call. */
732 p
= locate_first_half (argptr
, &is_quote_enclosed
);
734 /* Check if this is an Objective-C method (anything that starts with
735 a '+' or '-' and a '['). */
736 if (is_objc_method_format (p
))
739 paren_pointer
= NULL
; /* Just a category name. Ignore it. */
742 /* Check if the symbol could be an Objective-C selector. */
745 struct symtabs_and_lines values
;
746 values
= decode_objc (argptr
, funfirstline
, NULL
,
747 canonical
, saved_arg
);
748 if (values
.sals
!= NULL
)
752 /* Does it look like there actually were two parts? */
754 if ((p
[0] == ':' || p
[0] == '.') && paren_pointer
== NULL
)
757 *argptr
= *argptr
+ 1;
759 /* Is it a C++ or Java compound data structure?
760 The check on p[1] == ':' is capturing the case of "::",
761 since p[0]==':' was checked above.
762 Note that the call to decode_compound does everything
763 for us, including the lookup on the symbol table, so we
766 if (p
[0] == '.' || p
[1] == ':')
767 return decode_compound (argptr
, funfirstline
, canonical
,
770 /* No, the first part is a filename; set file_symtab to be that file's
771 symtab. Also, move argptr past the filename. */
773 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
,
777 /* No one really seems to know why this was added. It certainly
778 breaks the command line, though, whenever the passed
779 name is of the form ClassName::Method. This bit of code
780 singles out the class name, and if funfirstline is set (for
781 example, you are setting a breakpoint at this function),
782 you get an error. This did not occur with earlier
783 verions, so I am ifdef'ing this out. 3/29/99 */
786 /* Check if what we have till now is a symbol name */
788 /* We may be looking at a template instantiation such
789 as "foo<int>". Check here whether we know about it,
790 instead of falling through to the code below which
791 handles ordinary function names, because that code
792 doesn't like seeing '<' and '>' in a name -- the
793 skip_quoted call doesn't go past them. So see if we
794 can figure it out right now. */
796 copy
= (char *) alloca (p
- *argptr
+ 1);
797 memcpy (copy
, *argptr
, p
- *argptr
);
798 copy
[p
- *argptr
] = '\000';
799 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
802 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
803 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
805 /* Otherwise fall out from here and go to file/line spec
810 /* file_symtab is specified file's symtab, or 0 if no file specified.
811 arg no longer contains the file name. */
813 /* Check whether arg is all digits (and sign). */
816 if (*q
== '-' || *q
== '+')
818 while (*q
>= '0' && *q
<= '9')
821 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
822 /* We found a token consisting of all digits -- at least one digit. */
823 return decode_all_digits (argptr
, default_symtab
, default_line
,
824 canonical
, file_symtab
, q
);
826 /* Arg token is not digits => try it as a variable name
827 Find the next token (everything up to end or next whitespace). */
829 if (**argptr
== '$') /* May be a convenience variable. */
830 /* One or two $ chars possible. */
831 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
834 p
= skip_quoted (*argptr
);
836 error (_("Unmatched single quote."));
838 else if (is_objc_method
)
840 /* allow word separators in method names for Obj-C */
841 p
= skip_quoted_chars (*argptr
, NULL
, "");
843 else if (paren_pointer
!= NULL
)
845 p
= paren_pointer
+ 1;
849 p
= skip_quoted (*argptr
);
852 copy
= (char *) alloca (p
- *argptr
+ 1);
853 memcpy (copy
, *argptr
, p
- *argptr
);
854 copy
[p
- *argptr
] = '\0';
857 && copy
[0] == copy
[p
- *argptr
- 1]
858 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
860 copy
[p
- *argptr
- 1] = '\0';
863 while (*p
== ' ' || *p
== '\t')
867 /* If it starts with $: may be a legitimate variable or routine name
868 (e.g. HP-UX millicode routines such as $$dyncall), or it may
869 be history value, or it may be a convenience variable. */
872 return decode_dollar (copy
, funfirstline
, default_symtab
,
873 canonical
, file_symtab
);
875 /* Look up that token as a variable.
876 If file specified, use that file's per-file block to start with. */
878 return decode_variable (copy
, funfirstline
, canonical
,
879 file_symtab
, not_found_ptr
);
884 /* Now, more helper functions for decode_line_1. Some conventions
885 that these functions follow:
887 Decode_line_1 typically passes along some of its arguments or local
888 variables to the subfunctions. It passes the variables by
889 reference if they are modified by the subfunction, and by value
892 Some of the functions have side effects that don't arise from
893 variables that are passed by reference. In particular, if a
894 function is passed ARGPTR as an argument, it modifies what ARGPTR
895 points to; typically, it advances *ARGPTR past whatever substring
896 it has just looked at. (If it doesn't modify *ARGPTR, then the
897 function gets passed *ARGPTR instead, which is then called ARG: see
898 set_flags, for example.) Also, functions that return a struct
899 symtabs_and_lines may modify CANONICAL, as in the description of
902 If a function returns a struct symtabs_and_lines, then that struct
903 will immediately make its way up the call chain to be returned by
904 decode_line_1. In particular, all of the functions decode_XXX
905 calculate the appropriate struct symtabs_and_lines, under the
906 assumption that their argument is of the form XXX. */
908 /* First, some functions to initialize stuff at the beggining of the
912 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
914 if (*default_symtab
== 0)
916 /* Use whatever we have for the default source line. We don't use
917 get_current_or_default_symtab_and_line as it can recurse and call
919 struct symtab_and_line cursal
=
920 get_current_source_symtab_and_line ();
922 *default_symtab
= cursal
.symtab
;
923 *default_line
= cursal
.line
;
928 set_flags (char *arg
, int *is_quoted
, char **paren_pointer
)
933 /* 'has_if' is for the syntax:
934 (gdb) break foo if (a==b)
936 if ((ii
= strstr (arg
, " if ")) != NULL
||
937 (ii
= strstr (arg
, "\tif ")) != NULL
||
938 (ii
= strstr (arg
, " if\t")) != NULL
||
939 (ii
= strstr (arg
, "\tif\t")) != NULL
||
940 (ii
= strstr (arg
, " if(")) != NULL
||
941 (ii
= strstr (arg
, "\tif( ")) != NULL
)
943 /* Temporarily zap out "if (condition)" to not confuse the
944 parenthesis-checking code below. This is undone below. Do not
952 && strchr (get_gdb_completer_quote_characters (),
955 *paren_pointer
= strchr (arg
, '(');
956 if (*paren_pointer
!= NULL
)
957 *paren_pointer
= strrchr (*paren_pointer
, ')');
959 /* Now that we're safely past the paren_pointer check, put back " if
960 (condition)" so outer layers can see it. */
967 /* Decode arg of the form *PC. */
969 static struct symtabs_and_lines
970 decode_indirect (char **argptr
)
972 struct symtabs_and_lines values
;
976 pc
= parse_and_eval_address_1 (argptr
);
978 values
.sals
= (struct symtab_and_line
*)
979 xmalloc (sizeof (struct symtab_and_line
));
982 values
.sals
[0] = find_pc_line (pc
, 0);
983 values
.sals
[0].pc
= pc
;
984 values
.sals
[0].section
= find_pc_overlay (pc
);
985 values
.sals
[0].explicit_pc
= 1;
992 /* Locate the first half of the linespec, ending in a colon, period,
993 or whitespace. (More or less.) Also, check to see if *ARGPTR is
994 enclosed in double quotes; if so, set is_quote_enclosed, advance
995 ARGPTR past that and zero out the trailing double quote.
996 If ARGPTR is just a simple name like "main", p will point to ""
1000 locate_first_half (char **argptr
, int *is_quote_enclosed
)
1006 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1007 and we must isolate the first half. Outer layers will call again later
1008 for the second half.
1010 Don't count commas that appear in argument lists of overloaded
1011 functions, or in quoted strings. It's stupid to go to this much
1012 trouble when the rest of the function is such an obvious roach hotel. */
1013 ii
= find_toplevel_char (*argptr
, ',');
1014 has_comma
= (ii
!= 0);
1016 /* Temporarily zap out second half to not confuse the code below.
1017 This is undone below. Do not change ii!! */
1023 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1024 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1030 *is_quote_enclosed
= 1;
1035 *is_quote_enclosed
= 0;
1040 char *temp_end
= find_template_name_end (p
);
1042 error (_("malformed template specification in command"));
1045 /* Check for a colon and a plus or minus and a [ (which
1046 indicates an Objective-C method) */
1047 if (is_objc_method_format (p
))
1051 /* Check for the end of the first half of the linespec. End of
1052 line, a tab, a double colon or the last single colon, or a
1053 space. But if enclosed in double quotes we do not break on
1058 && ((p
[1] == ':') || (strchr (p
+ 1, ':') == NULL
)))
1059 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1061 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1063 /* Java qualified method. Find the *last* '.', since the
1064 others are package qualifiers. */
1065 for (p1
= p
; *p1
; p1
++)
1073 while (p
[0] == ' ' || p
[0] == '\t')
1076 /* If the closing double quote was left at the end, remove it. */
1077 if (*is_quote_enclosed
)
1079 char *closing_quote
= strchr (p
- 1, '"');
1080 if (closing_quote
&& closing_quote
[1] == '\0')
1081 *closing_quote
= '\0';
1084 /* Now that we've safely parsed the first half, put back ',' so
1085 outer layers can see it. */
1094 /* Here's where we recognise an Objective-C Selector. An Objective C
1095 selector may be implemented by more than one class, therefore it
1096 may represent more than one method/function. This gives us a
1097 situation somewhat analogous to C++ overloading. If there's more
1098 than one method that could represent the selector, then use some of
1099 the existing C++ code to let the user choose one. */
1101 struct symtabs_and_lines
1102 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1103 char ***canonical
, char *saved_arg
)
1105 struct symtabs_and_lines values
;
1106 struct symbol
**sym_arr
= NULL
;
1107 struct symbol
*sym
= NULL
;
1109 struct block
*block
= NULL
;
1116 if (file_symtab
!= NULL
)
1117 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
), STATIC_BLOCK
);
1120 enum language save_language
;
1122 /* get_selected_block can change the current language when there is
1123 no selected frame yet. */
1124 save_language
= current_language
->la_language
;
1125 block
= get_selected_block (0);
1126 set_language (save_language
);
1129 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1133 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1136 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1140 /* i1 now represents the TOTAL number of matches found.
1141 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1142 which will come first in the sym_arr array. Any low-level
1143 (minimal_symbol) matches will follow those. */
1149 /* Already a struct symbol. */
1154 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1155 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1157 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1162 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1165 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1167 /* Canonicalize this, so it remains resolved for dylib loads. */
1168 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1169 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1173 /* The only match was a non-debuggable symbol. */
1174 values
.sals
[0].symtab
= NULL
;
1175 values
.sals
[0].line
= 0;
1176 values
.sals
[0].end
= 0;
1177 values
.sals
[0].pc
= SYMBOL_VALUE_ADDRESS (sym_arr
[0]);
1184 /* More than one match. The user must choose one or more. */
1185 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1191 /* This handles C++ and Java compound data structures. P should point
1192 at the first component separator, i.e. double-colon or period. As
1193 an example, on entrance to this function we could have ARGPTR
1194 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1196 static struct symtabs_and_lines
1197 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1198 char *saved_arg
, char *p
)
1200 struct symtabs_and_lines values
;
1202 char *saved_arg2
= *argptr
;
1206 struct symbol
*sym_class
;
1207 struct symbol
**sym_arr
;
1210 /* First check for "global" namespace specification, of the form
1211 "::foo". If found, skip over the colons and jump to normal
1212 symbol processing. I.e. the whole line specification starts with
1213 "::" (note the condition that *argptr == p). */
1215 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1218 /* Given our example "AAA::inA::fun", we have two cases to consider:
1220 1) AAA::inA is the name of a class. In that case, presumably it
1221 has a method called "fun"; we then look up that method using
1224 2) AAA::inA isn't the name of a class. In that case, either the
1225 user made a typo or AAA::inA is the name of a namespace.
1226 Either way, we just look up AAA::inA::fun with lookup_symbol.
1228 Thus, our first task is to find everything before the last set of
1229 double-colons and figure out if it's the name of a class. So we
1230 first loop through all of the double-colons. */
1232 p2
= p
; /* Save for restart. */
1234 /* This is very messy. Following the example above we have now the
1237 argptr -> "AAA::inA::fun
1238 saved_arg -> "AAA::inA::fun
1239 saved_arg2 -> "AAA::inA::fun
1240 p2 -> "::inA::fun". */
1242 /* In the loop below, with these strings, we'll make 2 passes, each
1243 is marked in comments.*/
1247 /* Move pointer up to next possible class/namespace token. */
1249 p
= p2
+ 1; /* Restart with old value +1. */
1251 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1252 i.e. if there is a double-colon, p will now point to the
1254 /* PASS2: p2->"::fun", p->":fun" */
1256 /* Move pointer ahead to next double-colon. */
1257 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\''))
1261 temp_end
= find_template_name_end (p
);
1263 error (_("malformed template specification in command"));
1266 /* Note that, since, at the start of this loop, p would be
1267 pointing to the second colon in a double-colon, we only
1268 satisfy the condition below if there is another
1269 double-colon to the right (after). I.e. there is another
1270 component that can be a class or a namespace. I.e, if at
1271 the beginning of this loop (PASS1), we had
1272 p->":inA::fun", we'll trigger this when p has been
1273 advanced to point to "::fun". */
1274 /* PASS2: we will not trigger this. */
1275 else if ((p
[0] == ':') && (p
[1] == ':'))
1276 break; /* Found double-colon. */
1278 /* PASS2: We'll keep getting here, until p->"", at which point
1279 we exit this loop. */
1284 break; /* Out of the while (1). This would happen
1285 for instance if we have looked up
1286 unsuccessfully all the components of the
1287 string, and p->""(PASS2) */
1289 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1291 /* Save restart for next time around. */
1293 /* Restore argptr as it was on entry to this function. */
1294 *argptr
= saved_arg2
;
1295 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1298 /* All ready for next pass through the loop. */
1302 /* Start of lookup in the symbol tables. */
1304 /* Lookup in the symbol table the substring between argptr and
1305 p. Note, this call changes the value of argptr. */
1306 /* Before the call, argptr->"AAA::inA::fun",
1307 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1309 sym_class
= lookup_prefix_sym (argptr
, p2
);
1311 /* If sym_class has been found, and if "AAA::inA" is a class, then
1312 we're in case 1 above. So we look up "fun" as a method of that
1315 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1316 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1317 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1319 /* Arg token is not digits => try it as a function name.
1320 Find the next token (everything up to end or next
1323 && strchr (get_gdb_completer_quote_characters (),
1326 p
= skip_quoted (*argptr
);
1327 *argptr
= *argptr
+ 1;
1331 /* At this point argptr->"fun". */
1333 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':')
1335 /* At this point p->"". String ended. */
1338 /* Allocate our own copy of the substring between argptr and
1340 copy
= (char *) alloca (p
- *argptr
+ 1);
1341 memcpy (copy
, *argptr
, p
- *argptr
);
1342 copy
[p
- *argptr
] = '\0';
1344 && copy
[p
- *argptr
- 1]
1345 && strchr (get_gdb_completer_quote_characters (),
1346 copy
[p
- *argptr
- 1]) != NULL
)
1347 copy
[p
- *argptr
- 1] = '\0';
1349 /* At this point copy->"fun", p->"" */
1351 /* No line number may be specified. */
1352 while (*p
== ' ' || *p
== '\t')
1355 /* At this point arptr->"". */
1357 /* Look for copy as a method of sym_class. */
1358 /* At this point copy->"fun", sym_class is "AAA:inA",
1359 saved_arg->"AAA::inA::fun". This concludes the scanning of
1360 the string for possible components matches. If we find it
1361 here, we return. If not, and we are at the and of the string,
1362 we'll lookup the whole string in the symbol tables. */
1364 return find_method (funfirstline
, canonical
, saved_arg
,
1365 copy
, t
, sym_class
);
1367 } /* End if symbol found */
1370 /* We couldn't find a class, so we're in case 2 above. We check the
1371 entire name as a symbol instead. */
1373 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1374 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1375 /* Note: if is_quoted should be true, we snuff out quote here
1377 copy
[p
- saved_arg2
] = '\000';
1378 /* Set argptr to skip over the name. */
1379 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1381 /* Look up entire name */
1382 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1384 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1386 /* Couldn't find any interpretation as classes/namespaces, so give
1387 up. The quotes are important if copy is empty. */
1388 cplusplus_error (saved_arg
,
1389 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1393 /* Next come some helper functions for decode_compound. */
1395 /* Return the symbol corresponding to the substring of *ARGPTR ending
1396 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1397 name in question, the compound object separator ("::" or "."), and
1398 whitespace. Note that *ARGPTR is changed whether or not the
1399 lookup_symbol call finds anything (i.e we return NULL). As an
1400 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1402 static struct symbol
*
1403 lookup_prefix_sym (char **argptr
, char *p
)
1408 /* Extract the class name. */
1410 while (p
!= *argptr
&& p
[-1] == ' ')
1412 copy
= (char *) alloca (p
- *argptr
+ 1);
1413 memcpy (copy
, *argptr
, p
- *argptr
);
1414 copy
[p
- *argptr
] = 0;
1416 /* Discard the class name from the argptr. */
1417 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1418 while (*p
== ' ' || *p
== '\t')
1422 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1423 argptr->"inA::fun" */
1425 return lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0);
1428 /* This finds the method COPY in the class whose type is T and whose
1429 symbol is SYM_CLASS. */
1431 static struct symtabs_and_lines
1432 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1433 char *copy
, struct type
*t
, struct symbol
*sym_class
)
1435 struct symtabs_and_lines values
;
1436 struct symbol
*sym
= NULL
;
1437 int i1
; /* Counter for the symbol array. */
1438 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1439 * sizeof (struct symbol
*));
1441 /* Find all methods with a matching name, and put them in
1444 i1
= collect_methods (copy
, t
, sym_class
, sym_arr
);
1448 /* There is exactly one field with that name. */
1451 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1453 values
.sals
= (struct symtab_and_line
*)
1454 xmalloc (sizeof (struct symtab_and_line
));
1456 values
.sals
[0] = find_function_start_sal (sym
,
1468 /* There is more than one field with that name
1469 (overloaded). Ask the user which one to use. */
1470 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1476 if (is_operator_name (copy
))
1478 tmp
= (char *) alloca (strlen (copy
+ 3) + 9);
1479 strcpy (tmp
, "operator ");
1480 strcat (tmp
, copy
+ 3);
1485 cplusplus_error (saved_arg
,
1486 "the class `%s' does not have destructor defined\n",
1487 SYMBOL_PRINT_NAME (sym_class
));
1489 cplusplus_error (saved_arg
,
1490 "the class %s does not have any method named %s\n",
1491 SYMBOL_PRINT_NAME (sym_class
), tmp
);
1495 /* Find all methods named COPY in the class whose type is T, and put
1496 them in SYM_ARR. Return the number of methods found. */
1499 collect_methods (char *copy
, struct type
*t
,
1500 struct symbol
*sym_class
, struct symbol
**sym_arr
)
1502 int i1
= 0; /* Counter for the symbol array. */
1504 if (destructor_name_p (copy
, t
))
1506 /* Destructors are a special case. */
1507 int m_index
, f_index
;
1509 if (get_destructor_fn_field (t
, &m_index
, &f_index
))
1511 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (t
, m_index
);
1514 lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f
, f_index
),
1515 NULL
, VAR_DOMAIN
, (int *) NULL
);
1521 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1528 /* Return the symtab associated to the filename given by the substring
1529 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1530 NOT_FOUND_PTR is not null and the source file is not found, store
1531 boolean true at the location pointed to and do not issue an
1534 static struct symtab
*
1535 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1540 struct symtab
*file_symtab
;
1543 while (p
!= *argptr
&& p
[-1] == ' ')
1545 if ((*p
== '"') && is_quote_enclosed
)
1547 copy
= (char *) alloca (p
- *argptr
+ 1);
1548 memcpy (copy
, *argptr
, p
- *argptr
);
1549 /* It may have the ending quote right after the file name. */
1550 if (is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1551 copy
[p
- *argptr
- 1] = 0;
1553 copy
[p
- *argptr
] = 0;
1555 /* Find that file's data. */
1556 file_symtab
= lookup_symtab (copy
);
1557 if (file_symtab
== 0)
1561 if (!have_full_symbols () && !have_partial_symbols ())
1562 throw_error (NOT_FOUND_ERROR
,
1563 _("No symbol table is loaded. Use the \"file\" command."));
1564 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1567 /* Discard the file name from the arg. */
1569 while (*p
== ' ' || *p
== '\t')
1578 /* This decodes a line where the argument is all digits (possibly
1579 preceded by a sign). Q should point to the end of those digits;
1580 the other arguments are as usual. */
1582 static struct symtabs_and_lines
1583 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1584 int default_line
, char ***canonical
,
1585 struct symtab
*file_symtab
, char *q
)
1588 struct symtabs_and_lines values
;
1589 struct symtab_and_line val
;
1597 /* We might need a canonical line spec if no file was specified. */
1598 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1602 /* This is where we need to make sure that we have good defaults.
1603 We must guarantee that this section of code is never executed
1604 when we are called with just a function name, since
1605 set_default_source_symtab_and_line uses
1606 select_source_symtab that calls us with such an argument. */
1608 if (file_symtab
== 0 && default_symtab
== 0)
1610 /* Make sure we have at least a default source file. */
1611 set_default_source_symtab_and_line ();
1612 initialize_defaults (&default_symtab
, &default_line
);
1615 if (**argptr
== '+')
1616 sign
= plus
, (*argptr
)++;
1617 else if (**argptr
== '-')
1618 sign
= minus
, (*argptr
)++;
1619 val
.line
= atoi (*argptr
);
1625 if (file_symtab
== 0)
1626 val
.line
= default_line
+ val
.line
;
1631 if (file_symtab
== 0)
1632 val
.line
= default_line
- val
.line
;
1637 break; /* No need to adjust val.line. */
1640 while (*q
== ' ' || *q
== '\t')
1643 if (file_symtab
== 0)
1644 file_symtab
= default_symtab
;
1646 /* It is possible that this source file has more than one symtab,
1647 and that the new line number specification has moved us from the
1648 default (in file_symtab) to a new one. */
1649 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1650 if (val
.symtab
== 0)
1651 val
.symtab
= file_symtab
;
1654 values
.sals
= (struct symtab_and_line
*)
1655 xmalloc (sizeof (struct symtab_and_line
));
1656 values
.sals
[0] = val
;
1659 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1660 values
.sals
[0].explicit_line
= 1;
1666 /* Decode a linespec starting with a dollar sign. */
1668 static struct symtabs_and_lines
1669 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1670 char ***canonical
, struct symtab
*file_symtab
)
1674 int need_canonical
= 0;
1675 struct symtabs_and_lines values
;
1676 struct symtab_and_line val
;
1679 struct minimal_symbol
*msymbol
;
1681 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1682 while (*p
>= '0' && *p
<= '9')
1684 if (!*p
) /* Reached end of token without hitting non-digit. */
1686 /* We have a value history reference. */
1687 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1688 valx
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1689 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1690 error (_("History values used in line specs must have integer values."));
1694 /* Not all digits -- may be user variable/function or a
1695 convenience variable. */
1697 /* Look up entire name as a symbol first. */
1698 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1699 file_symtab
= (struct symtab
*) NULL
;
1701 /* Symbol was found --> jump to normal symbol processing. */
1703 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1705 /* If symbol was not found, look in minimal symbol tables. */
1706 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1707 /* Min symbol was found --> jump to minsym processing. */
1709 return minsym_found (funfirstline
, msymbol
);
1711 /* Not a user variable or function -- must be convenience variable. */
1712 valx
= value_of_internalvar (lookup_internalvar (copy
+ 1));
1713 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1714 error (_("Convenience variables used in line specs must have integer values."));
1719 /* Either history value or convenience value from above, in valx. */
1720 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
1721 val
.line
= value_as_long (valx
);
1724 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
1725 values
.sals
[0] = val
;
1729 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1736 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1737 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1738 the function cannot be found, store boolean true in the location pointed to
1739 and do not issue an error message. */
1741 static struct symtabs_and_lines
1742 decode_variable (char *copy
, int funfirstline
, char ***canonical
,
1743 struct symtab
*file_symtab
, int *not_found_ptr
)
1747 struct minimal_symbol
*msymbol
;
1749 sym
= lookup_symbol (copy
,
1751 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1753 : get_selected_block (0)),
1757 return symbol_found (funfirstline
, canonical
, copy
, sym
, file_symtab
);
1759 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1761 if (msymbol
!= NULL
)
1762 return minsym_found (funfirstline
, msymbol
);
1767 if (!have_full_symbols ()
1768 && !have_partial_symbols ()
1769 && !have_minimal_symbols ())
1770 throw_error (NOT_FOUND_ERROR
,
1771 _("No symbol table is loaded. Use the \"file\" command."));
1772 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1778 /* Now come some functions that are called from multiple places within
1781 /* We've found a symbol SYM to associate with our linespec; build a
1782 corresponding struct symtabs_and_lines. */
1784 static struct symtabs_and_lines
1785 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1786 struct symbol
*sym
, struct symtab
*file_symtab
)
1788 struct symtabs_and_lines values
;
1790 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1792 /* Arg is the name of a function */
1793 values
.sals
= (struct symtab_and_line
*)
1794 xmalloc (sizeof (struct symtab_and_line
));
1795 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1798 /* Don't use the SYMBOL_LINE; if used at all it points to
1799 the line containing the parameters or thereabouts, not
1800 the first line of code. */
1802 /* We might need a canonical line spec if it is a static
1804 if (file_symtab
== 0)
1806 struct blockvector
*bv
= BLOCKVECTOR (SYMBOL_SYMTAB (sym
));
1807 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1808 if (lookup_block_symbol (b
, copy
, NULL
, VAR_DOMAIN
) != NULL
)
1809 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1816 error (_("\"%s\" is not a function"), copy
);
1817 else if (SYMBOL_LINE (sym
) != 0)
1819 /* We know its line number. */
1820 values
.sals
= (struct symtab_and_line
*)
1821 xmalloc (sizeof (struct symtab_and_line
));
1823 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1824 values
.sals
[0].symtab
= SYMBOL_SYMTAB (sym
);
1825 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1829 /* This can happen if it is compiled with a compiler which doesn't
1830 put out line numbers for variables. */
1831 /* FIXME: Shouldn't we just set .line and .symtab to zero
1832 and return? For example, "info line foo" could print
1834 error (_("Line number not known for symbol \"%s\""), copy
);
1838 /* We've found a minimal symbol MSYMBOL to associate with our
1839 linespec; build a corresponding struct symtabs_and_lines. */
1841 static struct symtabs_and_lines
1842 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1844 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1845 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1846 struct symtabs_and_lines values
;
1849 values
.sals
= (struct symtab_and_line
*)
1850 xmalloc (sizeof (struct symtab_and_line
));
1851 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1852 (struct obj_section
*) 0, 0);
1853 values
.sals
[0].section
= SYMBOL_OBJ_SECTION (msymbol
);
1855 /* The minimal symbol might point to a function descriptor;
1856 resolve it to the actual code address instead. */
1857 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
,
1860 if (pc
!= values
.sals
[0].pc
)
1861 values
.sals
[0] = find_pc_sect_line (pc
, NULL
, 0);
1865 struct symtab_and_line sal
;
1867 values
.sals
[0].pc
= find_function_start_pc (gdbarch
,
1869 values
.sals
[0].section
);
1871 sal
= find_pc_sect_line (values
.sals
[0].pc
, values
.sals
[0].section
, 0);
1873 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
1874 line is still part of the same function. If there is no
1875 line information here, sal.pc will be the passed in PC. */
1876 if (sal
.pc
!= values
.sals
[0].pc
1877 && (lookup_minimal_symbol_by_pc_section (values
.sals
[0].pc
,
1878 values
.sals
[0].section
)
1879 == lookup_minimal_symbol_by_pc_section (sal
.end
,
1880 values
.sals
[0].section
)))
1881 /* Recalculate the line number (might not be N+1). */
1882 values
.sals
[0] = find_pc_sect_line (sal
.end
, values
.sals
[0].section
, 0);
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