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 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 /* We share this one with symtab.c, but it is not exported widely. */
42 extern char *operator_chars (char *, char **);
44 /* Prototypes for local functions */
46 static void initialize_defaults (struct symtab
**default_symtab
,
49 static void set_flags (char *arg
, int *is_quoted
, char **paren_pointer
);
51 static struct symtabs_and_lines
decode_indirect (char **argptr
);
53 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
55 static struct symtabs_and_lines
decode_objc (char **argptr
,
57 struct symtab
*file_symtab
,
61 static struct symtabs_and_lines
decode_compound (char **argptr
,
67 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
69 static struct symtabs_and_lines
find_method (int funfirstline
,
74 struct symbol
*sym_class
);
76 static int collect_methods (char *copy
, struct type
*t
,
77 struct symbol
*sym_class
,
78 struct symbol
**sym_arr
);
80 static NORETURN
void cplusplus_error (const char *name
,
82 ATTR_NORETURN
ATTR_FORMAT (printf
, 2, 3);
84 static int total_number_of_methods (struct type
*type
);
86 static int find_methods (struct type
*, char *,
87 enum language
, struct symbol
**);
89 static int add_matching_methods (int method_counter
, struct type
*t
,
90 enum language language
,
91 struct symbol
**sym_arr
);
93 static int add_constructors (int method_counter
, struct type
*t
,
94 enum language language
,
95 struct symbol
**sym_arr
);
97 static void build_canonical_line_spec (struct symtab_and_line
*,
100 static char *find_toplevel_char (char *s
, char c
);
102 static int is_objc_method_format (const char *s
);
104 static struct symtabs_and_lines
decode_line_2 (struct symbol
*[],
107 static struct symtab
*symtab_from_filename (char **argptr
,
108 char *p
, int is_quote_enclosed
,
112 symtabs_and_lines
decode_all_digits (char **argptr
,
113 struct symtab
*default_symtab
,
116 struct symtab
*file_symtab
,
119 static struct symtabs_and_lines
decode_dollar (char *copy
,
121 struct symtab
*default_symtab
,
123 struct symtab
*file_symtab
);
125 static struct symtabs_and_lines
decode_variable (char *copy
,
128 struct symtab
*file_symtab
,
132 symtabs_and_lines
symbol_found (int funfirstline
,
136 struct symtab
*file_symtab
,
137 struct symtab
*sym_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
;
153 tmp_stream
= mem_fileopen ();
154 make_cleanup_ui_file_delete (tmp_stream
);
158 va_start (args
, fmt
);
159 vfprintf_unfiltered (tmp_stream
, fmt
, args
);
163 while (*name
== '\'')
165 fprintf_unfiltered (tmp_stream
,
166 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
167 "(Note leading single quote.)"),
169 error_stream (tmp_stream
);
172 /* Return the number of methods described for TYPE, including the
173 methods from types it derives from. This can't be done in the symbol
174 reader because the type of the baseclass might still be stubbed
175 when the definition of the derived class is parsed. */
178 total_number_of_methods (struct type
*type
)
183 CHECK_TYPEDEF (type
);
184 if (TYPE_CPLUS_SPECIFIC (type
) == NULL
)
186 count
= TYPE_NFN_FIELDS_TOTAL (type
);
188 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
189 count
+= total_number_of_methods (TYPE_BASECLASS (type
, n
));
194 /* Recursive helper function for decode_line_1.
195 Look for methods named NAME in type T.
196 Return number of matches.
197 Put matches in SYM_ARR, which should have been allocated with
198 a size of total_number_of_methods (T) * sizeof (struct symbol *).
199 Note that this function is g++ specific. */
202 find_methods (struct type
*t
, char *name
, enum language language
,
203 struct symbol
**sym_arr
)
207 char *class_name
= type_name_no_tag (t
);
209 /* Ignore this class if it doesn't have a name. This is ugly, but
210 unless we figure out how to get the physname without the name of
211 the class, then the loop can't do any good. */
213 && (lookup_symbol_in_language (class_name
, (struct block
*) NULL
,
214 STRUCT_DOMAIN
, language
, (int *) NULL
,
215 (struct symtab
**) NULL
)))
218 int name_len
= strlen (name
);
222 /* Loop over each method name. At this level, all overloads of a name
223 are counted as a single name. There is an inner loop which loops over
226 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
230 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
233 if (strncmp (method_name
, "__", 2) == 0 ||
234 strncmp (method_name
, "op", 2) == 0 ||
235 strncmp (method_name
, "type", 4) == 0)
237 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
238 method_name
= dem_opname
;
239 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
240 method_name
= dem_opname
;
243 if (strcmp_iw (name
, method_name
) == 0)
244 /* Find all the overloaded methods with that name. */
245 i1
+= add_matching_methods (method_counter
, t
, language
,
247 else if (strncmp (class_name
, name
, name_len
) == 0
248 && (class_name
[name_len
] == '\0'
249 || class_name
[name_len
] == '<'))
250 i1
+= add_constructors (method_counter
, t
, language
,
255 /* Only search baseclasses if there is no match yet, since names in
256 derived classes override those in baseclasses.
258 FIXME: The above is not true; it is only true of member functions
259 if they have the same number of arguments (??? - section 13.1 of the
260 ARM says the function members are not in the same scope but doesn't
261 really spell out the rules in a way I understand. In any case, if
262 the number of arguments differ this is a case in which we can overload
263 rather than hiding without any problem, and gcc 2.4.5 does overload
264 rather than hiding in this case). */
267 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
268 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
269 language
, sym_arr
+ i1
);
274 /* Add the symbols associated to methods of the class whose type is T
275 and whose name matches the method indexed by METHOD_COUNTER in the
276 array SYM_ARR. Return the number of methods added. */
279 add_matching_methods (int method_counter
, struct type
*t
,
280 enum language language
, struct symbol
**sym_arr
)
285 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
292 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
294 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
298 tmp_name
= gdb_mangle_name (t
,
301 phys_name
= alloca (strlen (tmp_name
) + 1);
302 strcpy (phys_name
, tmp_name
);
306 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
308 /* Destructor is handled by caller, don't add it to
310 if (is_destructor_name (phys_name
) != 0)
313 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
317 (struct symtab
**) NULL
);
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
,
375 (struct symtab
**) NULL
);
383 /* Helper function for decode_line_1.
384 Build a canonical line spec in CANONICAL if it is non-NULL and if
385 the SAL has a symtab.
386 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
387 If SYMNAME is NULL the line number from SAL is used and the canonical
388 line spec is `filename:linenum'. */
391 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
394 char **canonical_arr
;
395 char *canonical_name
;
397 struct symtab
*s
= sal
->symtab
;
399 if (s
== (struct symtab
*) NULL
400 || s
->filename
== (char *) NULL
401 || canonical
== (char ***) NULL
)
404 canonical_arr
= (char **) xmalloc (sizeof (char *));
405 *canonical
= canonical_arr
;
407 filename
= s
->filename
;
410 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
411 sprintf (canonical_name
, "%s:%s", filename
, symname
);
415 canonical_name
= xmalloc (strlen (filename
) + 30);
416 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
418 canonical_arr
[0] = canonical_name
;
423 /* Find an instance of the character C in the string S that is outside
424 of all parenthesis pairs, single-quoted strings, and double-quoted
425 strings. Also, ignore the char within a template name, like a ','
426 within foo<int, int>. */
429 find_toplevel_char (char *s
, char c
)
431 int quoted
= 0; /* zero if we're not in quotes;
432 '"' if we're in a double-quoted string;
433 '\'' if we're in a single-quoted string. */
434 int depth
= 0; /* Number of unclosed parens we've seen. */
437 for (scan
= s
; *scan
; scan
++)
443 else if (*scan
== '\\' && *(scan
+ 1))
446 else if (*scan
== c
&& ! quoted
&& depth
== 0)
448 else if (*scan
== '"' || *scan
== '\'')
450 else if (*scan
== '(' || *scan
== '<')
452 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
459 /* Determines if the gives string corresponds to an Objective-C method
460 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
461 are allowed to have spaces and parentheses in them. */
464 is_objc_method_format (const char *s
)
466 if (s
== NULL
|| *s
== '\0')
468 /* Handle arguments with the format FILENAME:SYMBOL. */
469 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
470 && (s
[2] == '[') && strchr(s
, ']'))
472 /* Handle arguments that are just SYMBOL. */
473 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
478 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
479 operate on (ask user if necessary).
480 If CANONICAL is non-NULL return a corresponding array of mangled names
481 as canonical line specs there. */
483 static struct symtabs_and_lines
484 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
487 struct symtabs_and_lines values
, return_values
;
492 struct cleanup
*old_chain
;
493 char **canonical_arr
= (char **) NULL
;
494 const char *select_mode
= multiple_symbols_select_mode ();
496 if (select_mode
== multiple_symbols_cancel
)
498 canceled because the command is ambiguous\n\
499 See set/show multiple-symbol."));
501 values
.sals
= (struct symtab_and_line
*)
502 alloca (nelts
* sizeof (struct symtab_and_line
));
503 return_values
.sals
= (struct symtab_and_line
*)
504 xmalloc (nelts
* sizeof (struct symtab_and_line
));
505 old_chain
= make_cleanup (xfree
, return_values
.sals
);
509 canonical_arr
= (char **) xmalloc (nelts
* sizeof (char *));
510 make_cleanup (xfree
, canonical_arr
);
511 memset (canonical_arr
, 0, nelts
* sizeof (char *));
512 *canonical
= canonical_arr
;
518 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
519 init_sal (&values
.sals
[i
]);
520 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
521 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
525 /* If select_mode is "all", then do not print the multiple-choice
526 menu and act as if the user had chosen choice "1" (all). */
527 if (select_mode
== multiple_symbols_all
)
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
= DEPRECATED_SYMBOL_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
= DEPRECATED_SYMBOL_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 s 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, &sym_symtab
);
802 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
803 return symbol_found (funfirstline
, canonical
, copy
, sym
,
806 /* Otherwise fall out from here and go to file/line spec
811 /* S is specified file's symtab, or 0 if no file specified.
812 arg no longer contains the file name. */
814 /* Check whether arg is all digits (and sign). */
817 if (*q
== '-' || *q
== '+')
819 while (*q
>= '0' && *q
<= '9')
822 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
823 /* We found a token consisting of all digits -- at least one digit. */
824 return decode_all_digits (argptr
, default_symtab
, default_line
,
825 canonical
, file_symtab
, q
);
827 /* Arg token is not digits => try it as a variable name
828 Find the next token (everything up to end or next whitespace). */
830 if (**argptr
== '$') /* May be a convenience variable. */
831 /* One or two $ chars possible. */
832 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
835 p
= skip_quoted (*argptr
);
837 error (_("Unmatched single quote."));
839 else if (is_objc_method
)
841 /* allow word separators in method names for Obj-C */
842 p
= skip_quoted_chars (*argptr
, NULL
, "");
844 else if (paren_pointer
!= NULL
)
846 p
= paren_pointer
+ 1;
850 p
= skip_quoted (*argptr
);
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
);
1120 block
= get_selected_block (0);
1122 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1126 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1129 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1133 /* i1 now represents the TOTAL number of matches found.
1134 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1135 which will come first in the sym_arr array. Any low-level
1136 (minimal_symbol) matches will follow those. */
1142 /* Already a struct symbol. */
1147 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1148 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1150 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1155 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1158 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1160 /* Canonicalize this, so it remains resolved for dylib loads. */
1161 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1162 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1166 /* The only match was a non-debuggable symbol. */
1167 values
.sals
[0].symtab
= NULL
;
1168 values
.sals
[0].line
= 0;
1169 values
.sals
[0].end
= 0;
1170 values
.sals
[0].pc
= SYMBOL_VALUE_ADDRESS (sym_arr
[0]);
1177 /* More than one match. The user must choose one or more. */
1178 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1184 /* This handles C++ and Java compound data structures. P should point
1185 at the first component separator, i.e. double-colon or period. As
1186 an example, on entrance to this function we could have ARGPTR
1187 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1189 static struct symtabs_and_lines
1190 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1191 char *saved_arg
, char *p
)
1193 struct symtabs_and_lines values
;
1195 char *saved_arg2
= *argptr
;
1198 /* The symtab that SYM was found in. */
1199 struct symtab
*sym_symtab
;
1201 struct symbol
*sym_class
;
1202 struct symbol
**sym_arr
;
1205 /* First check for "global" namespace specification, of the form
1206 "::foo". If found, skip over the colons and jump to normal
1207 symbol processing. I.e. the whole line specification starts with
1208 "::" (note the condition that *argptr == p). */
1210 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1213 /* Given our example "AAA::inA::fun", we have two cases to consider:
1215 1) AAA::inA is the name of a class. In that case, presumably it
1216 has a method called "fun"; we then look up that method using
1219 2) AAA::inA isn't the name of a class. In that case, either the
1220 user made a typo or AAA::inA is the name of a namespace.
1221 Either way, we just look up AAA::inA::fun with lookup_symbol.
1223 Thus, our first task is to find everything before the last set of
1224 double-colons and figure out if it's the name of a class. So we
1225 first loop through all of the double-colons. */
1227 p2
= p
; /* Save for restart. */
1229 /* This is very messy. Following the example above we have now the
1232 argptr -> "AAA::inA::fun
1233 saved_arg -> "AAA::inA::fun
1234 saved_arg2 -> "AAA::inA::fun
1235 p2 -> "::inA::fun". */
1237 /* In the loop below, with these strings, we'll make 2 passes, each
1238 is marked in comments.*/
1242 /* Move pointer up to next possible class/namespace token. */
1244 p
= p2
+ 1; /* Restart with old value +1. */
1246 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1247 i.e. if there is a double-colon, p will now point to the
1249 /* PASS2: p2->"::fun", p->":fun" */
1251 /* Move pointer ahead to next double-colon. */
1252 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\''))
1256 temp_end
= find_template_name_end (p
);
1258 error (_("malformed template specification in command"));
1261 /* Note that, since, at the start of this loop, p would be
1262 pointing to the second colon in a double-colon, we only
1263 satisfy the condition below if there is another
1264 double-colon to the right (after). I.e. there is another
1265 component that can be a class or a namespace. I.e, if at
1266 the beginning of this loop (PASS1), we had
1267 p->":inA::fun", we'll trigger this when p has been
1268 advanced to point to "::fun". */
1269 /* PASS2: we will not trigger this. */
1270 else if ((p
[0] == ':') && (p
[1] == ':'))
1271 break; /* Found double-colon. */
1273 /* PASS2: We'll keep getting here, until p->"", at which point
1274 we exit this loop. */
1279 break; /* Out of the while (1). This would happen
1280 for instance if we have looked up
1281 unsuccessfully all the components of the
1282 string, and p->""(PASS2) */
1284 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1286 /* Save restart for next time around. */
1288 /* Restore argptr as it was on entry to this function. */
1289 *argptr
= saved_arg2
;
1290 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1293 /* All ready for next pass through the loop. */
1297 /* Start of lookup in the symbol tables. */
1299 /* Lookup in the symbol table the substring between argptr and
1300 p. Note, this call changes the value of argptr. */
1301 /* Before the call, argptr->"AAA::inA::fun",
1302 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1304 sym_class
= lookup_prefix_sym (argptr
, p2
);
1306 /* If sym_class has been found, and if "AAA::inA" is a class, then
1307 we're in case 1 above. So we look up "fun" as a method of that
1310 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1311 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1312 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1314 /* Arg token is not digits => try it as a function name.
1315 Find the next token (everything up to end or next
1318 && strchr (get_gdb_completer_quote_characters (),
1321 p
= skip_quoted (*argptr
);
1322 *argptr
= *argptr
+ 1;
1326 /* At this point argptr->"fun". */
1328 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':')
1330 /* At this point p->"". String ended. */
1333 /* Allocate our own copy of the substring between argptr and
1335 copy
= (char *) alloca (p
- *argptr
+ 1);
1336 memcpy (copy
, *argptr
, p
- *argptr
);
1337 copy
[p
- *argptr
] = '\0';
1339 && copy
[p
- *argptr
- 1]
1340 && strchr (get_gdb_completer_quote_characters (),
1341 copy
[p
- *argptr
- 1]) != NULL
)
1342 copy
[p
- *argptr
- 1] = '\0';
1344 /* At this point copy->"fun", p->"" */
1346 /* No line number may be specified. */
1347 while (*p
== ' ' || *p
== '\t')
1350 /* At this point arptr->"". */
1352 /* Look for copy as a method of sym_class. */
1353 /* At this point copy->"fun", sym_class is "AAA:inA",
1354 saved_arg->"AAA::inA::fun". This concludes the scanning of
1355 the string for possible components matches. If we find it
1356 here, we return. If not, and we are at the and of the string,
1357 we'll lookup the whole string in the symbol tables. */
1359 return find_method (funfirstline
, canonical
, saved_arg
,
1360 copy
, t
, sym_class
);
1362 } /* End if symbol found */
1365 /* We couldn't find a class, so we're in case 2 above. We check the
1366 entire name as a symbol instead. */
1368 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1369 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1370 /* Note: if is_quoted should be true, we snuff out quote here
1372 copy
[p
- saved_arg2
] = '\000';
1373 /* Set argptr to skip over the name. */
1374 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1376 /* Look up entire name */
1377 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
1379 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1382 /* Couldn't find any interpretation as classes/namespaces, so give
1383 up. The quotes are important if copy is empty. */
1384 cplusplus_error (saved_arg
,
1385 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1389 /* Next come some helper functions for decode_compound. */
1391 /* Return the symbol corresponding to the substring of *ARGPTR ending
1392 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1393 name in question, the compound object separator ("::" or "."), and
1394 whitespace. Note that *ARGPTR is changed whether or not the
1395 lookup_symbol call finds anything (i.e we return NULL). As an
1396 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1398 static struct symbol
*
1399 lookup_prefix_sym (char **argptr
, char *p
)
1404 /* Extract the class name. */
1406 while (p
!= *argptr
&& p
[-1] == ' ')
1408 copy
= (char *) alloca (p
- *argptr
+ 1);
1409 memcpy (copy
, *argptr
, p
- *argptr
);
1410 copy
[p
- *argptr
] = 0;
1412 /* Discard the class name from the argptr. */
1413 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1414 while (*p
== ' ' || *p
== '\t')
1418 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1419 argptr->"inA::fun" */
1421 return lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0,
1422 (struct symtab
**) NULL
);
1425 /* This finds the method COPY in the class whose type is T and whose
1426 symbol is SYM_CLASS. */
1428 static struct symtabs_and_lines
1429 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1430 char *copy
, struct type
*t
, struct symbol
*sym_class
)
1432 struct symtabs_and_lines values
;
1433 struct symbol
*sym
= NULL
;
1434 int i1
; /* Counter for the symbol array. */
1435 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1436 * sizeof (struct symbol
*));
1438 /* Find all methods with a matching name, and put them in
1441 i1
= collect_methods (copy
, t
, sym_class
, sym_arr
);
1445 /* There is exactly one field with that name. */
1448 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1450 values
.sals
= (struct symtab_and_line
*)
1451 xmalloc (sizeof (struct symtab_and_line
));
1453 values
.sals
[0] = find_function_start_sal (sym
,
1465 /* There is more than one field with that name
1466 (overloaded). Ask the user which one to use. */
1467 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1473 if (is_operator_name (copy
))
1475 tmp
= (char *) alloca (strlen (copy
+ 3) + 9);
1476 strcpy (tmp
, "operator ");
1477 strcat (tmp
, copy
+ 3);
1482 cplusplus_error (saved_arg
,
1483 "the class `%s' does not have destructor defined\n",
1484 SYMBOL_PRINT_NAME (sym_class
));
1486 cplusplus_error (saved_arg
,
1487 "the class %s does not have any method named %s\n",
1488 SYMBOL_PRINT_NAME (sym_class
), tmp
);
1492 /* Find all methods named COPY in the class whose type is T, and put
1493 them in SYM_ARR. Return the number of methods found. */
1496 collect_methods (char *copy
, struct type
*t
,
1497 struct symbol
*sym_class
, struct symbol
**sym_arr
)
1499 int i1
= 0; /* Counter for the symbol array. */
1501 if (destructor_name_p (copy
, t
))
1503 /* Destructors are a special case. */
1504 int m_index
, f_index
;
1506 if (get_destructor_fn_field (t
, &m_index
, &f_index
))
1508 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (t
, m_index
);
1511 lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f
, f_index
),
1512 NULL
, VAR_DOMAIN
, (int *) NULL
,
1513 (struct symtab
**) NULL
);
1519 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1526 /* Return the symtab associated to the filename given by the substring
1527 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1528 NOT_FOUND_PTR is not null and the source file is not found, store
1529 boolean true at the location pointed to and do not issue an
1532 static struct symtab
*
1533 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1538 struct symtab
*file_symtab
;
1541 while (p
!= *argptr
&& p
[-1] == ' ')
1543 if ((*p
== '"') && is_quote_enclosed
)
1545 copy
= (char *) alloca (p
- *argptr
+ 1);
1546 memcpy (copy
, *argptr
, p
- *argptr
);
1547 /* It may have the ending quote right after the file name. */
1548 if (is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1549 copy
[p
- *argptr
- 1] = 0;
1551 copy
[p
- *argptr
] = 0;
1553 /* Find that file's data. */
1554 file_symtab
= lookup_symtab (copy
);
1555 if (file_symtab
== 0)
1557 if (!have_full_symbols () && !have_partial_symbols ())
1558 error (_("No symbol table is loaded. Use the \"file\" command."));
1561 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1564 /* Discard the file name from the arg. */
1566 while (*p
== ' ' || *p
== '\t')
1575 /* This decodes a line where the argument is all digits (possibly
1576 preceded by a sign). Q should point to the end of those digits;
1577 the other arguments are as usual. */
1579 static struct symtabs_and_lines
1580 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1581 int default_line
, char ***canonical
,
1582 struct symtab
*file_symtab
, char *q
)
1585 struct symtabs_and_lines values
;
1586 struct symtab_and_line val
;
1594 /* We might need a canonical line spec if no file was specified. */
1595 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1599 /* This is where we need to make sure that we have good defaults.
1600 We must guarantee that this section of code is never executed
1601 when we are called with just a function name, since
1602 set_default_source_symtab_and_line uses
1603 select_source_symtab that calls us with such an argument. */
1605 if (file_symtab
== 0 && default_symtab
== 0)
1607 /* Make sure we have at least a default source file. */
1608 set_default_source_symtab_and_line ();
1609 initialize_defaults (&default_symtab
, &default_line
);
1612 if (**argptr
== '+')
1613 sign
= plus
, (*argptr
)++;
1614 else if (**argptr
== '-')
1615 sign
= minus
, (*argptr
)++;
1616 val
.line
= atoi (*argptr
);
1622 if (file_symtab
== 0)
1623 val
.line
= default_line
+ val
.line
;
1628 if (file_symtab
== 0)
1629 val
.line
= default_line
- val
.line
;
1634 break; /* No need to adjust val.line. */
1637 while (*q
== ' ' || *q
== '\t')
1640 if (file_symtab
== 0)
1641 file_symtab
= default_symtab
;
1643 /* It is possible that this source file has more than one symtab,
1644 and that the new line number specification has moved us from the
1645 default (in file_symtab) to a new one. */
1646 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1647 if (val
.symtab
== 0)
1648 val
.symtab
= file_symtab
;
1651 values
.sals
= (struct symtab_and_line
*)
1652 xmalloc (sizeof (struct symtab_and_line
));
1653 values
.sals
[0] = val
;
1656 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1657 values
.sals
[0].explicit_line
= 1;
1663 /* Decode a linespec starting with a dollar sign. */
1665 static struct symtabs_and_lines
1666 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1667 char ***canonical
, struct symtab
*file_symtab
)
1671 int need_canonical
= 0;
1672 struct symtabs_and_lines values
;
1673 struct symtab_and_line val
;
1676 /* The symtab that SYM was found in. */
1677 struct symtab
*sym_symtab
;
1678 struct minimal_symbol
*msymbol
;
1680 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1681 while (*p
>= '0' && *p
<= '9')
1683 if (!*p
) /* Reached end of token without hitting non-digit. */
1685 /* We have a value history reference. */
1686 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1687 valx
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1688 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1689 error (_("History values used in line specs must have integer values."));
1693 /* Not all digits -- may be user variable/function or a
1694 convenience variable. */
1696 /* Look up entire name as a symbol first. */
1697 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
1698 file_symtab
= (struct symtab
*) NULL
;
1700 /* Symbol was found --> jump to normal symbol processing. */
1702 return symbol_found (funfirstline
, canonical
, copy
, sym
,
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
)
1746 /* The symtab that SYM was found in. */
1747 struct symtab
*sym_symtab
;
1749 struct minimal_symbol
*msymbol
;
1751 sym
= lookup_symbol (copy
,
1753 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1755 : get_selected_block (0)),
1756 VAR_DOMAIN
, 0, &sym_symtab
);
1759 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1760 file_symtab
, sym_symtab
);
1762 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1764 if (msymbol
!= NULL
)
1765 return minsym_found (funfirstline
, msymbol
);
1767 if (!have_full_symbols () &&
1768 !have_partial_symbols () && !have_minimal_symbols ())
1769 error (_("No symbol table is loaded. Use the \"file\" command."));
1773 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1779 /* Now come some functions that are called from multiple places within
1782 /* We've found a symbol SYM to associate with our linespec; build a
1783 corresponding struct symtabs_and_lines. */
1785 static struct symtabs_and_lines
1786 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1787 struct symbol
*sym
, struct symtab
*file_symtab
,
1788 struct symtab
*sym_symtab
)
1790 struct symtabs_and_lines values
;
1792 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1794 /* Arg is the name of a function */
1795 values
.sals
= (struct symtab_and_line
*)
1796 xmalloc (sizeof (struct symtab_and_line
));
1797 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1800 /* Don't use the SYMBOL_LINE; if used at all it points to
1801 the line containing the parameters or thereabouts, not
1802 the first line of code. */
1804 /* We might need a canonical line spec if it is a static
1806 if (file_symtab
== 0)
1808 struct blockvector
*bv
= BLOCKVECTOR (sym_symtab
);
1809 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1810 if (lookup_block_symbol (b
, copy
, NULL
, VAR_DOMAIN
) != NULL
)
1811 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1818 error (_("\"%s\" is not a function"), copy
);
1819 else if (SYMBOL_LINE (sym
) != 0)
1821 /* We know its line number. */
1822 values
.sals
= (struct symtab_and_line
*)
1823 xmalloc (sizeof (struct symtab_and_line
));
1825 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1826 values
.sals
[0].symtab
= sym_symtab
;
1827 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1831 /* This can happen if it is compiled with a compiler which doesn't
1832 put out line numbers for variables. */
1833 /* FIXME: Shouldn't we just set .line and .symtab to zero
1834 and return? For example, "info line foo" could print
1836 error (_("Line number not known for symbol \"%s\""), copy
);
1840 /* We've found a minimal symbol MSYMBOL to associate with our
1841 linespec; build a corresponding struct symtabs_and_lines. */
1843 static struct symtabs_and_lines
1844 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1846 struct symtabs_and_lines values
;
1848 values
.sals
= (struct symtab_and_line
*)
1849 xmalloc (sizeof (struct symtab_and_line
));
1850 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1851 (struct bfd_section
*) 0, 0);
1852 values
.sals
[0].section
= SYMBOL_BFD_SECTION (msymbol
);
1855 struct symtab_and_line sal
;
1858 += gdbarch_deprecated_function_start_offset (current_gdbarch
);
1859 values
.sals
[0].pc
= gdbarch_skip_prologue
1860 (current_gdbarch
, values
.sals
[0].pc
);
1862 sal
= find_pc_sect_line (values
.sals
[0].pc
, values
.sals
[0].section
, 0);
1864 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
1865 line is still part of the same function. If there is no
1866 line information here, sal.pc will be the passed in PC. */
1867 if (sal
.pc
!= values
.sals
[0].pc
1868 && (lookup_minimal_symbol_by_pc_section (values
.sals
[0].pc
,
1869 values
.sals
[0].section
)
1870 == lookup_minimal_symbol_by_pc_section (sal
.end
,
1871 values
.sals
[0].section
)))
1872 /* Recalculate the line number (might not be N+1). */
1873 values
.sals
[0] = find_pc_sect_line (sal
.end
, values
.sals
[0].section
, 0);
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