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
,
71 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
73 static struct symtabs_and_lines
find_method (int funfirstline
,
78 struct symbol
*sym_class
,
81 static NORETURN
void cplusplus_error (const char *name
,
83 ATTR_NORETURN
ATTR_FORMAT (printf
, 2, 3);
85 static int total_number_of_methods (struct type
*type
);
87 static int find_methods (struct type
*, char *,
88 enum language
, struct symbol
**);
90 static int add_matching_methods (int method_counter
, struct type
*t
,
91 enum language language
,
92 struct symbol
**sym_arr
);
94 static int add_constructors (int method_counter
, struct type
*t
,
95 enum language language
,
96 struct symbol
**sym_arr
);
98 static void build_canonical_line_spec (struct symtab_and_line
*,
101 static char *find_toplevel_char (char *s
, char c
);
103 static int is_objc_method_format (const char *s
);
105 static struct symtabs_and_lines
decode_line_2 (struct symbol
*[],
108 static struct symtab
*symtab_from_filename (char **argptr
,
109 char *p
, int is_quote_enclosed
,
113 symtabs_and_lines
decode_all_digits (char **argptr
,
114 struct symtab
*default_symtab
,
117 struct symtab
*file_symtab
,
120 static struct symtabs_and_lines
decode_dollar (char *copy
,
122 struct symtab
*default_symtab
,
124 struct symtab
*file_symtab
);
126 static struct symtabs_and_lines
decode_variable (char *copy
,
129 struct symtab
*file_symtab
,
133 symtabs_and_lines
symbol_found (int funfirstline
,
137 struct symtab
*file_symtab
);
140 symtabs_and_lines
minsym_found (int funfirstline
,
141 struct minimal_symbol
*msymbol
);
143 /* Helper functions. */
145 /* Issue a helpful hint on using the command completion feature on
146 single quoted demangled C++ symbols as part of the completion
150 cplusplus_error (const char *name
, const char *fmt
, ...)
152 struct ui_file
*tmp_stream
;
154 tmp_stream
= mem_fileopen ();
155 make_cleanup_ui_file_delete (tmp_stream
);
159 va_start (args
, fmt
);
160 vfprintf_unfiltered (tmp_stream
, fmt
, args
);
164 while (*name
== '\'')
166 fprintf_unfiltered (tmp_stream
,
167 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
168 "(Note leading single quote.)"),
171 message
= ui_file_xstrdup (tmp_stream
, NULL
);
172 make_cleanup (xfree
, message
);
173 throw_error (NOT_FOUND_ERROR
, "%s", message
);
176 /* Return the number of methods described for TYPE, including the
177 methods from types it derives from. This can't be done in the symbol
178 reader because the type of the baseclass might still be stubbed
179 when the definition of the derived class is parsed. */
182 total_number_of_methods (struct type
*type
)
187 CHECK_TYPEDEF (type
);
188 if (TYPE_CPLUS_SPECIFIC (type
) == NULL
)
190 count
= TYPE_NFN_FIELDS_TOTAL (type
);
192 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
193 count
+= total_number_of_methods (TYPE_BASECLASS (type
, n
));
198 /* Recursive helper function for decode_line_1.
199 Look for methods named NAME in type T.
200 Return number of matches.
201 Put matches in SYM_ARR, which should have been allocated with
202 a size of total_number_of_methods (T) * sizeof (struct symbol *).
203 Note that this function is g++ specific. */
206 find_methods (struct type
*t
, char *name
, enum language language
,
207 struct symbol
**sym_arr
)
211 char *class_name
= type_name_no_tag (t
);
213 /* Ignore this class if it doesn't have a name. This is ugly, but
214 unless we figure out how to get the physname without the name of
215 the class, then the loop can't do any good. */
217 && (lookup_symbol_in_language (class_name
, (struct block
*) NULL
,
218 STRUCT_DOMAIN
, language
, (int *) NULL
)))
221 int name_len
= strlen (name
);
225 /* Loop over each method name. At this level, all overloads of a name
226 are counted as a single name. There is an inner loop which loops over
229 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
233 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
236 if (strncmp (method_name
, "__", 2) == 0 ||
237 strncmp (method_name
, "op", 2) == 0 ||
238 strncmp (method_name
, "type", 4) == 0)
240 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
241 method_name
= dem_opname
;
242 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
243 method_name
= dem_opname
;
246 if (strcmp_iw (name
, method_name
) == 0)
247 /* Find all the overloaded methods with that name. */
248 i1
+= add_matching_methods (method_counter
, t
, language
,
250 else if (strncmp (class_name
, name
, name_len
) == 0
251 && (class_name
[name_len
] == '\0'
252 || class_name
[name_len
] == '<'))
253 i1
+= add_constructors (method_counter
, t
, language
,
258 /* Only search baseclasses if there is no match yet, since names in
259 derived classes override those in baseclasses.
261 FIXME: The above is not true; it is only true of member functions
262 if they have the same number of arguments (??? - section 13.1 of the
263 ARM says the function members are not in the same scope but doesn't
264 really spell out the rules in a way I understand. In any case, if
265 the number of arguments differ this is a case in which we can overload
266 rather than hiding without any problem, and gcc 2.4.5 does overload
267 rather than hiding in this case). */
270 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
271 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
272 language
, sym_arr
+ i1
);
277 /* Add the symbols associated to methods of the class whose type is T
278 and whose name matches the method indexed by METHOD_COUNTER in the
279 array SYM_ARR. Return the number of methods added. */
282 add_matching_methods (int method_counter
, struct type
*t
,
283 enum language language
, struct symbol
**sym_arr
)
288 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
295 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
297 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
301 tmp_name
= gdb_mangle_name (t
,
304 phys_name
= alloca (strlen (tmp_name
) + 1);
305 strcpy (phys_name
, tmp_name
);
309 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
311 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
319 /* This error message gets printed, but the method
320 still seems to be found
321 fputs_filtered("(Cannot find method ", gdb_stdout);
322 fprintf_symbol_filtered (gdb_stdout, phys_name,
324 DMGL_PARAMS | DMGL_ANSI);
325 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
333 /* Add the symbols associated to constructors of the class whose type
334 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
335 array SYM_ARR. Return the number of methods added. */
338 add_constructors (int method_counter
, struct type
*t
,
339 enum language language
, struct symbol
**sym_arr
)
344 /* For GCC 3.x and stabs, constructors and destructors
345 have names like __base_ctor and __complete_dtor.
346 Check the physname for now if we're looking for a
349 = TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
356 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
358 /* GCC 3.x will never produce stabs stub methods, so
359 we don't need to handle this case. */
360 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
362 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
363 if (! is_constructor_name (phys_name
))
366 /* If this method is actually defined, include it in the
368 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
379 /* Helper function for decode_line_1.
380 Build a canonical line spec in CANONICAL if it is non-NULL and if
381 the SAL has a symtab.
382 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
383 If SYMNAME is NULL the line number from SAL is used and the canonical
384 line spec is `filename:linenum'. */
387 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
390 char **canonical_arr
;
391 char *canonical_name
;
393 struct symtab
*s
= sal
->symtab
;
395 if (s
== (struct symtab
*) NULL
396 || s
->filename
== (char *) NULL
397 || canonical
== (char ***) NULL
)
400 canonical_arr
= (char **) xmalloc (sizeof (char *));
401 *canonical
= canonical_arr
;
403 filename
= s
->filename
;
406 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
407 sprintf (canonical_name
, "%s:%s", filename
, symname
);
411 canonical_name
= xmalloc (strlen (filename
) + 30);
412 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
414 canonical_arr
[0] = canonical_name
;
419 /* Find an instance of the character C in the string S that is outside
420 of all parenthesis pairs, single-quoted strings, and double-quoted
421 strings. Also, ignore the char within a template name, like a ','
422 within foo<int, int>. */
425 find_toplevel_char (char *s
, char c
)
427 int quoted
= 0; /* zero if we're not in quotes;
428 '"' if we're in a double-quoted string;
429 '\'' if we're in a single-quoted string. */
430 int depth
= 0; /* Number of unclosed parens we've seen. */
433 for (scan
= s
; *scan
; scan
++)
439 else if (*scan
== '\\' && *(scan
+ 1))
442 else if (*scan
== c
&& ! quoted
&& depth
== 0)
444 else if (*scan
== '"' || *scan
== '\'')
446 else if (*scan
== '(' || *scan
== '<')
448 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
455 /* Determines if the gives string corresponds to an Objective-C method
456 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
457 are allowed to have spaces and parentheses in them. */
460 is_objc_method_format (const char *s
)
462 if (s
== NULL
|| *s
== '\0')
464 /* Handle arguments with the format FILENAME:SYMBOL. */
465 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
466 && (s
[2] == '[') && strchr(s
, ']'))
468 /* Handle arguments that are just SYMBOL. */
469 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
474 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
475 operate on (ask user if necessary).
476 If CANONICAL is non-NULL return a corresponding array of mangled names
477 as canonical line specs there. */
479 static struct symtabs_and_lines
480 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
483 struct symtabs_and_lines values
, return_values
;
488 struct cleanup
*old_chain
;
489 char **canonical_arr
= (char **) NULL
;
490 const char *select_mode
= multiple_symbols_select_mode ();
492 if (select_mode
== multiple_symbols_cancel
)
494 canceled because the command is ambiguous\n\
495 See set/show multiple-symbol."));
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
;
514 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
515 init_sal (&values
.sals
[i
]);
516 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
517 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
521 /* If select_mode is "all", then do not print the multiple-choice
522 menu and act as if the user had chosen choice "1" (all). */
523 if (select_mode
== multiple_symbols_all
524 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
529 printf_unfiltered (_("[0] cancel\n[1] all\n"));
532 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
534 if (values
.sals
[i
].symtab
)
535 printf_unfiltered ("[%d] %s at %s:%d\n",
537 SYMBOL_PRINT_NAME (sym_arr
[i
]),
538 values
.sals
[i
].symtab
->filename
,
539 values
.sals
[i
].line
);
541 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"),
543 SYMBOL_PRINT_NAME (sym_arr
[i
]),
544 values
.sals
[i
].line
);
548 printf_unfiltered (_("?HERE\n"));
552 prompt
= getenv ("PS2");
557 args
= command_line_input (prompt
, 0, "overload-choice");
560 if (args
== 0 || *args
== 0)
561 error_no_arg (_("one or more choice numbers"));
569 while (*arg1
>= '0' && *arg1
<= '9')
571 if (*arg1
&& *arg1
!= ' ' && *arg1
!= '\t')
572 error (_("Arguments must be choice numbers."));
577 error (_("canceled"));
582 for (i
= 0; i
< nelts
; i
++)
584 if (canonical_arr
[i
] == NULL
)
586 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[i
]);
587 canonical_arr
[i
] = xstrdup (symname
);
591 memcpy (return_values
.sals
, values
.sals
,
592 (nelts
* sizeof (struct symtab_and_line
)));
593 return_values
.nelts
= nelts
;
594 discard_cleanups (old_chain
);
595 return return_values
;
598 if (num
>= nelts
+ 2)
600 printf_unfiltered (_("No choice number %d.\n"), num
);
605 if (values
.sals
[num
].pc
)
609 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[num
]);
610 make_cleanup (xfree
, symname
);
611 canonical_arr
[i
] = xstrdup (symname
);
613 return_values
.sals
[i
++] = values
.sals
[num
];
614 values
.sals
[num
].pc
= 0;
618 printf_unfiltered (_("duplicate request for %d ignored.\n"), num
);
623 while (*args
== ' ' || *args
== '\t')
626 return_values
.nelts
= i
;
627 discard_cleanups (old_chain
);
628 return return_values
;
631 /* The parser of linespec itself. */
633 /* Parse a string that specifies a line number.
634 Pass the address of a char * variable; that variable will be
635 advanced over the characters actually parsed.
639 LINENUM -- that line number in current file. PC returned is 0.
640 FILE:LINENUM -- that line in that file. PC returned is 0.
641 FUNCTION -- line number of openbrace of that function.
642 PC returned is the start of the function.
643 VARIABLE -- line number of definition of that variable.
645 FILE:FUNCTION -- likewise, but prefer functions in that file.
646 *EXPR -- line in which address EXPR appears.
648 This may all be followed by an "if EXPR", which we ignore.
650 FUNCTION may be an undebuggable function found in minimal symbol table.
652 If the argument FUNFIRSTLINE is nonzero, we want the first line
653 of real code inside a function when a function is specified, and it is
654 not OK to specify a variable or type to get its line number.
656 DEFAULT_SYMTAB specifies the file to use if none is specified.
657 It defaults to current_source_symtab.
658 DEFAULT_LINE specifies the line number to use for relative
659 line numbers (that start with signs). Defaults to current_source_line.
660 If CANONICAL is non-NULL, store an array of strings containing the canonical
661 line specs there if necessary. Currently overloaded member functions and
662 line numbers or static functions without a filename yield a canonical
663 line spec. The array and the line spec strings are allocated on the heap,
664 it is the callers responsibility to free them.
666 Note that it is possible to return zero for the symtab
667 if no file is validly specified. Callers must check that.
668 Also, the line number returned may be invalid.
670 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
671 on whether or not failure occurs due to an unknown function or file. In the case
672 where failure does occur due to an unknown function or file, do not issue an error
675 /* We allow single quotes in various places. This is a hideous
676 kludge, which exists because the completer can't yet deal with the
677 lack of single quotes. FIXME: write a linespec_completer which we
678 can use as appropriate instead of make_symbol_completion_list. */
680 struct symtabs_and_lines
681 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
682 int default_line
, char ***canonical
, int *not_found_ptr
)
686 /* If a file name is specified, this is its symtab. */
687 struct symtab
*file_symtab
= NULL
;
690 /* This is NULL if there are no parens in *ARGPTR, or a pointer to
691 the closing parenthesis if there are parens. */
693 /* This says whether or not something in *ARGPTR is quoted with
694 completer_quotes (i.e. with single quotes). */
696 /* Is part of *ARGPTR is enclosed in double quotes? */
697 int is_quote_enclosed
;
698 int is_objc_method
= 0;
699 char *saved_arg
= *argptr
;
704 /* Defaults have defaults. */
706 initialize_defaults (&default_symtab
, &default_line
);
708 /* See if arg is *PC. */
711 return decode_indirect (argptr
);
713 /* Set various flags. 'paren_pointer' is important for overload
714 checking, where we allow things like:
715 (gdb) break c::f(int)
718 set_flags (*argptr
, &is_quoted
, &paren_pointer
);
720 /* Check to see if it's a multipart linespec (with colons or
723 /* Locate the end of the first half of the linespec.
724 After the call, for instance, if the argptr string is "foo.c:123"
725 p will point at "123". If there is only one part, like "foo", p
726 will point to "". If this is a C++ name, like "A::B::foo", p will
727 point to "::B::foo". Argptr is not changed by this call. */
729 p
= locate_first_half (argptr
, &is_quote_enclosed
);
731 /* Check if this is an Objective-C method (anything that starts with
732 a '+' or '-' and a '['). */
733 if (is_objc_method_format (p
))
736 paren_pointer
= NULL
; /* Just a category name. Ignore it. */
739 /* Check if the symbol could be an Objective-C selector. */
742 struct symtabs_and_lines values
;
743 values
= decode_objc (argptr
, funfirstline
, NULL
,
744 canonical
, saved_arg
);
745 if (values
.sals
!= NULL
)
749 /* Does it look like there actually were two parts? */
751 if ((p
[0] == ':' || p
[0] == '.') && paren_pointer
== NULL
)
754 *argptr
= *argptr
+ 1;
756 /* Is it a C++ or Java compound data structure?
757 The check on p[1] == ':' is capturing the case of "::",
758 since p[0]==':' was checked above.
759 Note that the call to decode_compound does everything
760 for us, including the lookup on the symbol table, so we
763 if (p
[0] == '.' || p
[1] == ':')
764 return decode_compound (argptr
, funfirstline
, canonical
,
765 saved_arg
, p
, not_found_ptr
);
767 /* No, the first part is a filename; set file_symtab to be that file's
768 symtab. Also, move argptr past the filename. */
770 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
,
774 /* No one really seems to know why this was added. It certainly
775 breaks the command line, though, whenever the passed
776 name is of the form ClassName::Method. This bit of code
777 singles out the class name, and if funfirstline is set (for
778 example, you are setting a breakpoint at this function),
779 you get an error. This did not occur with earlier
780 verions, so I am ifdef'ing this out. 3/29/99 */
783 /* Check if what we have till now is a symbol name */
785 /* We may be looking at a template instantiation such
786 as "foo<int>". Check here whether we know about it,
787 instead of falling through to the code below which
788 handles ordinary function names, because that code
789 doesn't like seeing '<' and '>' in a name -- the
790 skip_quoted call doesn't go past them. So see if we
791 can figure it out right now. */
793 copy
= (char *) alloca (p
- *argptr
+ 1);
794 memcpy (copy
, *argptr
, p
- *argptr
);
795 copy
[p
- *argptr
] = '\000';
796 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
799 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
800 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
802 /* Otherwise fall out from here and go to file/line spec
807 /* file_symtab is specified file's symtab, or 0 if no file specified.
808 arg no longer contains the file name. */
810 /* Check whether arg is all digits (and sign). */
813 if (*q
== '-' || *q
== '+')
815 while (*q
>= '0' && *q
<= '9')
818 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
819 /* We found a token consisting of all digits -- at least one digit. */
820 return decode_all_digits (argptr
, default_symtab
, default_line
,
821 canonical
, file_symtab
, q
);
823 /* Arg token is not digits => try it as a variable name
824 Find the next token (everything up to end or next whitespace). */
826 if (**argptr
== '$') /* May be a convenience variable. */
827 /* One or two $ chars possible. */
828 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
831 p
= skip_quoted (*argptr
);
833 error (_("Unmatched single quote."));
835 else if (is_objc_method
)
837 /* allow word separators in method names for Obj-C */
838 p
= skip_quoted_chars (*argptr
, NULL
, "");
840 else if (paren_pointer
!= NULL
)
842 p
= paren_pointer
+ 1;
846 p
= skip_quoted (*argptr
);
849 /* Keep any template parameters */
851 p
= find_template_name_end (p
);
853 copy
= (char *) alloca (p
- *argptr
+ 1);
854 memcpy (copy
, *argptr
, p
- *argptr
);
855 copy
[p
- *argptr
] = '\0';
858 && copy
[0] == copy
[p
- *argptr
- 1]
859 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
861 copy
[p
- *argptr
- 1] = '\0';
864 while (*p
== ' ' || *p
== '\t')
868 /* If it starts with $: may be a legitimate variable or routine name
869 (e.g. HP-UX millicode routines such as $$dyncall), or it may
870 be history value, or it may be a convenience variable. */
873 return decode_dollar (copy
, funfirstline
, default_symtab
,
874 canonical
, file_symtab
);
876 /* Look up that token as a variable.
877 If file specified, use that file's per-file block to start with. */
879 return decode_variable (copy
, funfirstline
, canonical
,
880 file_symtab
, not_found_ptr
);
885 /* Now, more helper functions for decode_line_1. Some conventions
886 that these functions follow:
888 Decode_line_1 typically passes along some of its arguments or local
889 variables to the subfunctions. It passes the variables by
890 reference if they are modified by the subfunction, and by value
893 Some of the functions have side effects that don't arise from
894 variables that are passed by reference. In particular, if a
895 function is passed ARGPTR as an argument, it modifies what ARGPTR
896 points to; typically, it advances *ARGPTR past whatever substring
897 it has just looked at. (If it doesn't modify *ARGPTR, then the
898 function gets passed *ARGPTR instead, which is then called ARG: see
899 set_flags, for example.) Also, functions that return a struct
900 symtabs_and_lines may modify CANONICAL, as in the description of
903 If a function returns a struct symtabs_and_lines, then that struct
904 will immediately make its way up the call chain to be returned by
905 decode_line_1. In particular, all of the functions decode_XXX
906 calculate the appropriate struct symtabs_and_lines, under the
907 assumption that their argument is of the form XXX. */
909 /* First, some functions to initialize stuff at the beggining of the
913 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
915 if (*default_symtab
== 0)
917 /* Use whatever we have for the default source line. We don't use
918 get_current_or_default_symtab_and_line as it can recurse and call
920 struct symtab_and_line cursal
=
921 get_current_source_symtab_and_line ();
923 *default_symtab
= cursal
.symtab
;
924 *default_line
= cursal
.line
;
929 set_flags (char *arg
, int *is_quoted
, char **paren_pointer
)
934 /* 'has_if' is for the syntax:
935 (gdb) break foo if (a==b)
937 if ((ii
= strstr (arg
, " if ")) != NULL
||
938 (ii
= strstr (arg
, "\tif ")) != NULL
||
939 (ii
= strstr (arg
, " if\t")) != NULL
||
940 (ii
= strstr (arg
, "\tif\t")) != NULL
||
941 (ii
= strstr (arg
, " if(")) != NULL
||
942 (ii
= strstr (arg
, "\tif( ")) != NULL
)
944 /* Temporarily zap out "if (condition)" to not confuse the
945 parenthesis-checking code below. This is undone below. Do not
953 && strchr (get_gdb_completer_quote_characters (),
956 *paren_pointer
= strchr (arg
, '(');
957 if (*paren_pointer
!= NULL
)
958 *paren_pointer
= strrchr (*paren_pointer
, ')');
960 /* Now that we're safely past the paren_pointer check, put back " if
961 (condition)" so outer layers can see it. */
968 /* Decode arg of the form *PC. */
970 static struct symtabs_and_lines
971 decode_indirect (char **argptr
)
973 struct symtabs_and_lines values
;
977 pc
= parse_and_eval_address_1 (argptr
);
979 values
.sals
= (struct symtab_and_line
*)
980 xmalloc (sizeof (struct symtab_and_line
));
983 values
.sals
[0] = find_pc_line (pc
, 0);
984 values
.sals
[0].pc
= pc
;
985 values
.sals
[0].section
= find_pc_overlay (pc
);
986 values
.sals
[0].explicit_pc
= 1;
993 /* Locate the first half of the linespec, ending in a colon, period,
994 or whitespace. (More or less.) Also, check to see if *ARGPTR is
995 enclosed in double quotes; if so, set is_quote_enclosed, advance
996 ARGPTR past that and zero out the trailing double quote.
997 If ARGPTR is just a simple name like "main", p will point to ""
1001 locate_first_half (char **argptr
, int *is_quote_enclosed
)
1007 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1008 and we must isolate the first half. Outer layers will call again later
1009 for the second half.
1011 Don't count commas that appear in argument lists of overloaded
1012 functions, or in quoted strings. It's stupid to go to this much
1013 trouble when the rest of the function is such an obvious roach hotel. */
1014 ii
= find_toplevel_char (*argptr
, ',');
1015 has_comma
= (ii
!= 0);
1017 /* Temporarily zap out second half to not confuse the code below.
1018 This is undone below. Do not change ii!! */
1024 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1025 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1031 *is_quote_enclosed
= 1;
1036 *is_quote_enclosed
= 0;
1041 char *temp_end
= find_template_name_end (p
);
1043 error (_("malformed template specification in command"));
1046 /* Check for a colon and a plus or minus and a [ (which
1047 indicates an Objective-C method) */
1048 if (is_objc_method_format (p
))
1052 /* Check for the end of the first half of the linespec. End of
1053 line, a tab, a double colon or the last single colon, or a
1054 space. But if enclosed in double quotes we do not break on
1059 && ((p
[1] == ':') || (strchr (p
+ 1, ':') == NULL
)))
1060 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1062 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1064 /* Java qualified method. Find the *last* '.', since the
1065 others are package qualifiers. */
1066 for (p1
= p
; *p1
; p1
++)
1074 while (p
[0] == ' ' || p
[0] == '\t')
1077 /* If the closing double quote was left at the end, remove it. */
1078 if (*is_quote_enclosed
)
1080 char *closing_quote
= strchr (p
- 1, '"');
1081 if (closing_quote
&& closing_quote
[1] == '\0')
1082 *closing_quote
= '\0';
1085 /* Now that we've safely parsed the first half, put back ',' so
1086 outer layers can see it. */
1095 /* Here's where we recognise an Objective-C Selector. An Objective C
1096 selector may be implemented by more than one class, therefore it
1097 may represent more than one method/function. This gives us a
1098 situation somewhat analogous to C++ overloading. If there's more
1099 than one method that could represent the selector, then use some of
1100 the existing C++ code to let the user choose one. */
1102 struct symtabs_and_lines
1103 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1104 char ***canonical
, char *saved_arg
)
1106 struct symtabs_and_lines values
;
1107 struct symbol
**sym_arr
= NULL
;
1108 struct symbol
*sym
= NULL
;
1110 struct block
*block
= NULL
;
1117 if (file_symtab
!= NULL
)
1118 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
), STATIC_BLOCK
);
1121 enum language save_language
;
1123 /* get_selected_block can change the current language when there is
1124 no selected frame yet. */
1125 save_language
= current_language
->la_language
;
1126 block
= get_selected_block (0);
1127 set_language (save_language
);
1130 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1134 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1137 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1141 /* i1 now represents the TOTAL number of matches found.
1142 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1143 which will come first in the sym_arr array. Any low-level
1144 (minimal_symbol) matches will follow those. */
1150 /* Already a struct symbol. */
1155 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1156 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1158 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1163 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1166 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1168 /* Canonicalize this, so it remains resolved for dylib loads. */
1169 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1170 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1174 /* The only match was a non-debuggable symbol. */
1175 values
.sals
[0].symtab
= NULL
;
1176 values
.sals
[0].line
= 0;
1177 values
.sals
[0].end
= 0;
1178 values
.sals
[0].pc
= SYMBOL_VALUE_ADDRESS (sym_arr
[0]);
1185 /* More than one match. The user must choose one or more. */
1186 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1192 /* This handles C++ and Java compound data structures. P should point
1193 at the first component separator, i.e. double-colon or period. As
1194 an example, on entrance to this function we could have ARGPTR
1195 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1197 static struct symtabs_and_lines
1198 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1199 char *saved_arg
, char *p
, int *not_found_ptr
)
1201 struct symtabs_and_lines values
;
1203 char *saved_arg2
= *argptr
;
1207 struct symbol
*sym_class
;
1208 struct symbol
**sym_arr
;
1211 /* First check for "global" namespace specification, of the form
1212 "::foo". If found, skip over the colons and jump to normal
1213 symbol processing. I.e. the whole line specification starts with
1214 "::" (note the condition that *argptr == p). */
1216 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1219 /* Given our example "AAA::inA::fun", we have two cases to consider:
1221 1) AAA::inA is the name of a class. In that case, presumably it
1222 has a method called "fun"; we then look up that method using
1225 2) AAA::inA isn't the name of a class. In that case, either the
1226 user made a typo or AAA::inA is the name of a namespace.
1227 Either way, we just look up AAA::inA::fun with lookup_symbol.
1229 Thus, our first task is to find everything before the last set of
1230 double-colons and figure out if it's the name of a class. So we
1231 first loop through all of the double-colons. */
1233 p2
= p
; /* Save for restart. */
1235 /* This is very messy. Following the example above we have now the
1238 argptr -> "AAA::inA::fun
1239 saved_arg -> "AAA::inA::fun
1240 saved_arg2 -> "AAA::inA::fun
1241 p2 -> "::inA::fun". */
1243 /* In the loop below, with these strings, we'll make 2 passes, each
1244 is marked in comments.*/
1248 /* Move pointer up to next possible class/namespace token. */
1250 p
= p2
+ 1; /* Restart with old value +1. */
1252 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1253 i.e. if there is a double-colon, p will now point to the
1255 /* PASS2: p2->"::fun", p->":fun" */
1257 /* Move pointer ahead to next double-colon. */
1258 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\''))
1262 temp_end
= find_template_name_end (p
);
1264 error (_("malformed template specification in command"));
1267 /* Note that, since, at the start of this loop, p would be
1268 pointing to the second colon in a double-colon, we only
1269 satisfy the condition below if there is another
1270 double-colon to the right (after). I.e. there is another
1271 component that can be a class or a namespace. I.e, if at
1272 the beginning of this loop (PASS1), we had
1273 p->":inA::fun", we'll trigger this when p has been
1274 advanced to point to "::fun". */
1275 /* PASS2: we will not trigger this. */
1276 else if ((p
[0] == ':') && (p
[1] == ':'))
1277 break; /* Found double-colon. */
1279 /* PASS2: We'll keep getting here, until p->"", at which point
1280 we exit this loop. */
1285 break; /* Out of the while (1). This would happen
1286 for instance if we have looked up
1287 unsuccessfully all the components of the
1288 string, and p->""(PASS2) */
1290 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1292 /* Save restart for next time around. */
1294 /* Restore argptr as it was on entry to this function. */
1295 *argptr
= saved_arg2
;
1296 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1299 /* All ready for next pass through the loop. */
1303 /* Start of lookup in the symbol tables. */
1305 /* Lookup in the symbol table the substring between argptr and
1306 p. Note, this call changes the value of argptr. */
1307 /* Before the call, argptr->"AAA::inA::fun",
1308 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1310 sym_class
= lookup_prefix_sym (argptr
, p2
);
1312 /* If sym_class has been found, and if "AAA::inA" is a class, then
1313 we're in case 1 above. So we look up "fun" as a method of that
1316 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1317 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1318 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1320 /* Arg token is not digits => try it as a function name.
1321 Find the next token (everything up to end or next
1324 && strchr (get_gdb_completer_quote_characters (),
1327 p
= skip_quoted (*argptr
);
1328 *argptr
= *argptr
+ 1;
1332 /* At this point argptr->"fun". */
1334 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':')
1336 /* At this point p->"". String ended. */
1339 /* Allocate our own copy of the substring between argptr and
1341 copy
= (char *) alloca (p
- *argptr
+ 1);
1342 memcpy (copy
, *argptr
, p
- *argptr
);
1343 copy
[p
- *argptr
] = '\0';
1345 && copy
[p
- *argptr
- 1]
1346 && strchr (get_gdb_completer_quote_characters (),
1347 copy
[p
- *argptr
- 1]) != NULL
)
1348 copy
[p
- *argptr
- 1] = '\0';
1350 /* At this point copy->"fun", p->"" */
1352 /* No line number may be specified. */
1353 while (*p
== ' ' || *p
== '\t')
1356 /* At this point arptr->"". */
1358 /* Look for copy as a method of sym_class. */
1359 /* At this point copy->"fun", sym_class is "AAA:inA",
1360 saved_arg->"AAA::inA::fun". This concludes the scanning of
1361 the string for possible components matches. If we find it
1362 here, we return. If not, and we are at the and of the string,
1363 we'll lookup the whole string in the symbol tables. */
1365 return find_method (funfirstline
, canonical
, saved_arg
,
1366 copy
, t
, sym_class
, not_found_ptr
);
1368 } /* End if symbol found */
1371 /* We couldn't find a class, so we're in case 2 above. We check the
1372 entire name as a symbol instead. */
1374 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1375 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1376 /* Note: if is_quoted should be true, we snuff out quote here
1378 copy
[p
- saved_arg2
] = '\000';
1379 /* Set argptr to skip over the name. */
1380 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1382 /* Look up entire name */
1383 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1385 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1387 /* Couldn't find any interpretation as classes/namespaces, so give
1388 up. The quotes are important if copy is empty. */
1391 cplusplus_error (saved_arg
,
1392 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1396 /* Next come some helper functions for decode_compound. */
1398 /* Return the symbol corresponding to the substring of *ARGPTR ending
1399 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1400 name in question, the compound object separator ("::" or "."), and
1401 whitespace. Note that *ARGPTR is changed whether or not the
1402 lookup_symbol call finds anything (i.e we return NULL). As an
1403 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1405 static struct symbol
*
1406 lookup_prefix_sym (char **argptr
, char *p
)
1411 /* Extract the class name. */
1413 while (p
!= *argptr
&& p
[-1] == ' ')
1415 copy
= (char *) alloca (p
- *argptr
+ 1);
1416 memcpy (copy
, *argptr
, p
- *argptr
);
1417 copy
[p
- *argptr
] = 0;
1419 /* Discard the class name from the argptr. */
1420 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1421 while (*p
== ' ' || *p
== '\t')
1425 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1426 argptr->"inA::fun" */
1428 return lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0);
1431 /* This finds the method COPY in the class whose type is T and whose
1432 symbol is SYM_CLASS. */
1434 static struct symtabs_and_lines
1435 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1436 char *copy
, struct type
*t
, struct symbol
*sym_class
, int *not_found_ptr
)
1438 struct symtabs_and_lines values
;
1439 struct symbol
*sym
= NULL
;
1440 int i1
; /* Counter for the symbol array. */
1441 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1442 * sizeof (struct symbol
*));
1444 /* Find all methods with a matching name, and put them in
1447 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1451 /* There is exactly one field with that name. */
1454 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1456 values
.sals
= (struct symtab_and_line
*)
1457 xmalloc (sizeof (struct symtab_and_line
));
1459 values
.sals
[0] = find_function_start_sal (sym
,
1471 /* There is more than one field with that name
1472 (overloaded). Ask the user which one to use. */
1473 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1479 if (is_operator_name (copy
))
1481 tmp
= (char *) alloca (strlen (copy
+ 3) + 9);
1482 strcpy (tmp
, "operator ");
1483 strcat (tmp
, copy
+ 3);
1490 cplusplus_error (saved_arg
,
1491 "the class `%s' does not have destructor defined\n",
1492 SYMBOL_PRINT_NAME (sym_class
));
1494 cplusplus_error (saved_arg
,
1495 "the class %s does not have any method named %s\n",
1496 SYMBOL_PRINT_NAME (sym_class
), tmp
);
1502 /* Return the symtab associated to the filename given by the substring
1503 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1504 NOT_FOUND_PTR is not null and the source file is not found, store
1505 boolean true at the location pointed to and do not issue an
1508 static struct symtab
*
1509 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1514 struct symtab
*file_symtab
;
1517 while (p
!= *argptr
&& p
[-1] == ' ')
1519 if ((*p
== '"') && is_quote_enclosed
)
1521 copy
= (char *) alloca (p
- *argptr
+ 1);
1522 memcpy (copy
, *argptr
, p
- *argptr
);
1523 /* It may have the ending quote right after the file name. */
1524 if (is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1525 copy
[p
- *argptr
- 1] = 0;
1527 copy
[p
- *argptr
] = 0;
1529 /* Find that file's data. */
1530 file_symtab
= lookup_symtab (copy
);
1531 if (file_symtab
== 0)
1535 if (!have_full_symbols () && !have_partial_symbols ())
1536 throw_error (NOT_FOUND_ERROR
,
1537 _("No symbol table is loaded. Use the \"file\" command."));
1538 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1541 /* Discard the file name from the arg. */
1543 while (*p
== ' ' || *p
== '\t')
1552 /* This decodes a line where the argument is all digits (possibly
1553 preceded by a sign). Q should point to the end of those digits;
1554 the other arguments are as usual. */
1556 static struct symtabs_and_lines
1557 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1558 int default_line
, char ***canonical
,
1559 struct symtab
*file_symtab
, char *q
)
1562 struct symtabs_and_lines values
;
1563 struct symtab_and_line val
;
1571 /* We might need a canonical line spec if no file was specified. */
1572 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1576 /* This is where we need to make sure that we have good defaults.
1577 We must guarantee that this section of code is never executed
1578 when we are called with just a function name, since
1579 set_default_source_symtab_and_line uses
1580 select_source_symtab that calls us with such an argument. */
1582 if (file_symtab
== 0 && default_symtab
== 0)
1584 /* Make sure we have at least a default source file. */
1585 set_default_source_symtab_and_line ();
1586 initialize_defaults (&default_symtab
, &default_line
);
1589 if (**argptr
== '+')
1590 sign
= plus
, (*argptr
)++;
1591 else if (**argptr
== '-')
1592 sign
= minus
, (*argptr
)++;
1593 val
.line
= atoi (*argptr
);
1599 if (file_symtab
== 0)
1600 val
.line
= default_line
+ val
.line
;
1605 if (file_symtab
== 0)
1606 val
.line
= default_line
- val
.line
;
1611 break; /* No need to adjust val.line. */
1614 while (*q
== ' ' || *q
== '\t')
1617 if (file_symtab
== 0)
1618 file_symtab
= default_symtab
;
1620 /* It is possible that this source file has more than one symtab,
1621 and that the new line number specification has moved us from the
1622 default (in file_symtab) to a new one. */
1623 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1624 if (val
.symtab
== 0)
1625 val
.symtab
= file_symtab
;
1628 values
.sals
= (struct symtab_and_line
*)
1629 xmalloc (sizeof (struct symtab_and_line
));
1630 values
.sals
[0] = val
;
1633 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1634 values
.sals
[0].explicit_line
= 1;
1640 /* Decode a linespec starting with a dollar sign. */
1642 static struct symtabs_and_lines
1643 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1644 char ***canonical
, struct symtab
*file_symtab
)
1648 int need_canonical
= 0;
1649 struct symtabs_and_lines values
;
1650 struct symtab_and_line val
;
1653 struct minimal_symbol
*msymbol
;
1655 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1656 while (*p
>= '0' && *p
<= '9')
1658 if (!*p
) /* Reached end of token without hitting non-digit. */
1660 /* We have a value history reference. */
1661 struct value
*val_history
;
1662 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1663 val_history
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1664 if (TYPE_CODE (value_type (val_history
)) != TYPE_CODE_INT
)
1665 error (_("History values used in line specs must have integer values."));
1666 valx
= value_as_long (val_history
);
1670 /* Not all digits -- may be user variable/function or a
1671 convenience variable. */
1673 /* Look up entire name as a symbol first. */
1674 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1675 file_symtab
= (struct symtab
*) NULL
;
1677 /* Symbol was found --> jump to normal symbol processing. */
1679 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1681 /* If symbol was not found, look in minimal symbol tables. */
1682 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1683 /* Min symbol was found --> jump to minsym processing. */
1685 return minsym_found (funfirstline
, msymbol
);
1687 /* Not a user variable or function -- must be convenience variable. */
1688 if (!get_internalvar_integer (lookup_internalvar (copy
+ 1), &valx
))
1689 error (_("Convenience variables used in line specs must have integer values."));
1694 /* Either history value or convenience value from above, in valx. */
1695 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
1699 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
1700 values
.sals
[0] = val
;
1704 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1711 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1712 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1713 the function cannot be found, store boolean true in the location pointed to
1714 and do not issue an error message. */
1716 static struct symtabs_and_lines
1717 decode_variable (char *copy
, int funfirstline
, char ***canonical
,
1718 struct symtab
*file_symtab
, int *not_found_ptr
)
1722 struct minimal_symbol
*msymbol
;
1724 sym
= lookup_symbol (copy
,
1726 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1728 : get_selected_block (0)),
1732 return symbol_found (funfirstline
, canonical
, copy
, sym
, file_symtab
);
1734 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1736 if (msymbol
!= NULL
)
1737 return minsym_found (funfirstline
, msymbol
);
1742 if (!have_full_symbols ()
1743 && !have_partial_symbols ()
1744 && !have_minimal_symbols ())
1745 throw_error (NOT_FOUND_ERROR
,
1746 _("No symbol table is loaded. Use the \"file\" command."));
1747 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1753 /* Now come some functions that are called from multiple places within
1756 /* We've found a symbol SYM to associate with our linespec; build a
1757 corresponding struct symtabs_and_lines. */
1759 static struct symtabs_and_lines
1760 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1761 struct symbol
*sym
, struct symtab
*file_symtab
)
1763 struct symtabs_and_lines values
;
1765 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1767 /* Arg is the name of a function */
1768 values
.sals
= (struct symtab_and_line
*)
1769 xmalloc (sizeof (struct symtab_and_line
));
1770 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1773 /* Don't use the SYMBOL_LINE; if used at all it points to
1774 the line containing the parameters or thereabouts, not
1775 the first line of code. */
1777 /* We might need a canonical line spec if it is a static
1779 if (file_symtab
== 0)
1781 struct blockvector
*bv
= BLOCKVECTOR (SYMBOL_SYMTAB (sym
));
1782 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1783 if (lookup_block_symbol (b
, copy
, NULL
, VAR_DOMAIN
) != NULL
)
1784 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1791 error (_("\"%s\" is not a function"), copy
);
1792 else if (SYMBOL_LINE (sym
) != 0)
1794 /* We know its line number. */
1795 values
.sals
= (struct symtab_and_line
*)
1796 xmalloc (sizeof (struct symtab_and_line
));
1798 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1799 values
.sals
[0].symtab
= SYMBOL_SYMTAB (sym
);
1800 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1804 /* This can happen if it is compiled with a compiler which doesn't
1805 put out line numbers for variables. */
1806 /* FIXME: Shouldn't we just set .line and .symtab to zero
1807 and return? For example, "info line foo" could print
1809 error (_("Line number not known for symbol \"%s\""), copy
);
1813 /* We've found a minimal symbol MSYMBOL to associate with our
1814 linespec; build a corresponding struct symtabs_and_lines. */
1816 static struct symtabs_and_lines
1817 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1819 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1820 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1821 struct symtabs_and_lines values
;
1824 values
.sals
= (struct symtab_and_line
*)
1825 xmalloc (sizeof (struct symtab_and_line
));
1826 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1827 (struct obj_section
*) 0, 0);
1828 values
.sals
[0].section
= SYMBOL_OBJ_SECTION (msymbol
);
1830 /* The minimal symbol might point to a function descriptor;
1831 resolve it to the actual code address instead. */
1832 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
,
1835 if (pc
!= values
.sals
[0].pc
)
1836 values
.sals
[0] = find_pc_sect_line (pc
, NULL
, 0);
1840 struct symtab_and_line sal
;
1842 values
.sals
[0].pc
= find_function_start_pc (gdbarch
,
1844 values
.sals
[0].section
);
1846 sal
= find_pc_sect_line (values
.sals
[0].pc
, values
.sals
[0].section
, 0);
1848 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
1849 line is still part of the same function. If there is no
1850 line information here, sal.pc will be the passed in PC. */
1851 if (sal
.pc
!= values
.sals
[0].pc
1852 && (lookup_minimal_symbol_by_pc_section (values
.sals
[0].pc
,
1853 values
.sals
[0].section
)
1854 == lookup_minimal_symbol_by_pc_section (sal
.end
,
1855 values
.sals
[0].section
)))
1856 /* Recalculate the line number (might not be N+1). */
1857 values
.sals
[0] = find_pc_sect_line (sal
.end
, values
.sals
[0].section
, 0);
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