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, 2010, 2011 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 "cp-support.h"
34 #include "parser-defs.h"
36 #include "objc-lang.h"
38 #include "exceptions.h"
41 #include "mi/mi-cmds.h"
43 #include "arch-utils.h"
45 #include "cli/cli-utils.h"
47 /* We share this one with symtab.c, but it is not exported widely. */
49 extern char *operator_chars (char *, char **);
51 /* Prototypes for local functions. */
53 static void initialize_defaults (struct symtab
**default_symtab
,
56 static struct symtabs_and_lines
decode_indirect (char **argptr
);
58 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
60 static struct symtabs_and_lines
decode_objc (char **argptr
,
62 struct symtab
*file_symtab
,
63 struct linespec_result
*canonical
,
66 static struct symtabs_and_lines
decode_compound (char **argptr
,
68 struct linespec_result
*canonical
,
69 struct symtab
*file_symtab
,
73 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
,
76 static struct symtabs_and_lines
find_method (int funfirstline
,
77 struct linespec_result
*canonical
,
81 struct symbol
*sym_class
,
84 static void cplusplus_error (const char *name
, const char *fmt
, ...)
85 ATTRIBUTE_NORETURN
ATTRIBUTE_PRINTF (2, 3);
87 static int total_number_of_methods (struct type
*type
);
89 static int find_methods (struct type
*, char *,
90 enum language
, struct symbol
**, struct symtab
*);
92 static int add_matching_methods (int method_counter
, struct type
*t
,
93 enum language language
,
94 struct symbol
**sym_arr
);
96 static int add_constructors (int method_counter
, struct type
*t
,
97 enum language language
,
98 struct symbol
**sym_arr
);
100 static void build_canonical_line_spec (struct symtab_and_line
*,
101 char *, struct linespec_result
*);
103 static char *find_toplevel_char (char *s
, char c
);
105 static int is_objc_method_format (const char *s
);
107 static struct symtabs_and_lines
decode_line_2 (struct symbol
*[],
109 struct linespec_result
*);
111 static struct symtab
*symtab_from_filename (char **argptr
,
112 char *p
, int is_quote_enclosed
);
114 static struct symbol
*find_function_symbol (char **argptr
, char *p
,
115 int is_quote_enclosed
);
118 symtabs_and_lines
decode_all_digits (char **argptr
,
119 struct symtab
*default_symtab
,
121 struct linespec_result
*canonical
,
122 struct symtab
*file_symtab
,
125 static struct symtabs_and_lines
decode_dollar (char *copy
,
127 struct symtab
*default_symtab
,
128 struct linespec_result
*canonical
,
129 struct symtab
*file_symtab
);
131 static int decode_label (struct symbol
*function_symbol
,
132 char *copy
, struct linespec_result
*canonical
,
133 struct symtabs_and_lines
*result
);
135 static struct symtabs_and_lines
decode_variable (char *copy
,
137 struct linespec_result
*canonical
,
138 struct symtab
*file_symtab
);
141 symtabs_and_lines
symbol_found (int funfirstline
,
142 struct linespec_result
*canonical
,
145 struct symtab
*file_symtab
,
146 struct symbol
*function_symbol
);
149 symtabs_and_lines
minsym_found (int funfirstline
,
150 struct minimal_symbol
*msymbol
);
152 /* Helper functions. */
154 /* Issue a helpful hint on using the command completion feature on
155 single quoted demangled C++ symbols as part of the completion
159 cplusplus_error (const char *name
, const char *fmt
, ...)
161 struct ui_file
*tmp_stream
;
164 tmp_stream
= mem_fileopen ();
165 make_cleanup_ui_file_delete (tmp_stream
);
170 va_start (args
, fmt
);
171 vfprintf_unfiltered (tmp_stream
, fmt
, args
);
175 while (*name
== '\'')
177 fprintf_unfiltered (tmp_stream
,
178 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
179 "(Note leading single quote.)"),
182 message
= ui_file_xstrdup (tmp_stream
, NULL
);
183 make_cleanup (xfree
, message
);
184 throw_error (NOT_FOUND_ERROR
, "%s", message
);
187 /* Return the number of methods described for TYPE, including the
188 methods from types it derives from. This can't be done in the symbol
189 reader because the type of the baseclass might still be stubbed
190 when the definition of the derived class is parsed. */
193 total_number_of_methods (struct type
*type
)
198 CHECK_TYPEDEF (type
);
199 if (! HAVE_CPLUS_STRUCT (type
))
201 count
= TYPE_NFN_FIELDS_TOTAL (type
);
203 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
204 count
+= total_number_of_methods (TYPE_BASECLASS (type
, n
));
209 /* Returns the block to be used for symbol searches for the given SYMTAB,
210 which may be NULL. */
212 static struct block
*
213 get_search_block (struct symtab
*symtab
)
218 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab
), STATIC_BLOCK
);
221 enum language save_language
;
223 /* get_selected_block can change the current language when there is
224 no selected frame yet. */
225 save_language
= current_language
->la_language
;
226 block
= get_selected_block (0);
227 set_language (save_language
);
233 /* Recursive helper function for decode_line_1.
234 Look for methods named NAME in type T.
235 Return number of matches.
236 Put matches in SYM_ARR, which should have been allocated with
237 a size of total_number_of_methods (T) * sizeof (struct symbol *).
238 Note that this function is g++ specific. */
241 find_methods (struct type
*t
, char *name
, enum language language
,
242 struct symbol
**sym_arr
, struct symtab
*file_symtab
)
246 char *class_name
= type_name_no_tag (t
);
247 struct cleanup
*cleanup
;
250 /* NAME is typed by the user: it needs to be canonicalized before
251 passing to lookup_symbol. */
252 canon
= cp_canonicalize_string (name
);
256 cleanup
= make_cleanup (xfree
, name
);
259 cleanup
= make_cleanup (null_cleanup
, NULL
);
261 /* Ignore this class if it doesn't have a name. This is ugly, but
262 unless we figure out how to get the physname without the name of
263 the class, then the loop can't do any good. */
265 && (lookup_symbol_in_language (class_name
, get_search_block (file_symtab
),
266 STRUCT_DOMAIN
, language
, (int *) NULL
)))
269 int name_len
= strlen (name
);
273 /* Loop over each method name. At this level, all overloads of a name
274 are counted as a single name. There is an inner loop which loops over
277 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
281 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
284 if (strncmp (method_name
, "__", 2) == 0 ||
285 strncmp (method_name
, "op", 2) == 0 ||
286 strncmp (method_name
, "type", 4) == 0)
288 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
289 method_name
= dem_opname
;
290 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
291 method_name
= dem_opname
;
294 if (strcmp_iw (name
, method_name
) == 0)
295 /* Find all the overloaded methods with that name. */
296 i1
+= add_matching_methods (method_counter
, t
, language
,
298 else if (strncmp (class_name
, name
, name_len
) == 0
299 && (class_name
[name_len
] == '\0'
300 || class_name
[name_len
] == '<'))
301 i1
+= add_constructors (method_counter
, t
, language
,
306 /* Only search baseclasses if there is no match yet, since names in
307 derived classes override those in baseclasses.
309 FIXME: The above is not true; it is only true of member functions
310 if they have the same number of arguments (??? - section 13.1 of the
311 ARM says the function members are not in the same scope but doesn't
312 really spell out the rules in a way I understand. In any case, if
313 the number of arguments differ this is a case in which we can overload
314 rather than hiding without any problem, and gcc 2.4.5 does overload
315 rather than hiding in this case). */
318 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
319 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
320 language
, sym_arr
+ i1
, file_symtab
);
322 do_cleanups (cleanup
);
326 /* Add the symbols associated to methods of the class whose type is T
327 and whose name matches the method indexed by METHOD_COUNTER in the
328 array SYM_ARR. Return the number of methods added. */
331 add_matching_methods (int method_counter
, struct type
*t
,
332 enum language language
, struct symbol
**sym_arr
)
337 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
342 const char *phys_name
;
344 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
346 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
348 char *tmp_name
, *tmp2
;
350 tmp_name
= gdb_mangle_name (t
,
353 tmp2
= alloca (strlen (tmp_name
) + 1);
354 strcpy (tmp2
, tmp_name
);
359 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
361 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
369 /* This error message gets printed, but the method
370 still seems to be found.
371 fputs_filtered("(Cannot find method ", gdb_stdout);
372 fprintf_symbol_filtered (gdb_stdout, phys_name,
374 DMGL_PARAMS | DMGL_ANSI);
375 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
383 /* Add the symbols associated to constructors of the class whose type
384 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
385 array SYM_ARR. Return the number of methods added. */
388 add_constructors (int method_counter
, struct type
*t
,
389 enum language language
, struct symbol
**sym_arr
)
394 /* For GCC 3.x and stabs, constructors and destructors
395 have names like __base_ctor and __complete_dtor.
396 Check the physname for now if we're looking for a
399 = TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
404 const char *phys_name
;
406 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
408 /* GCC 3.x will never produce stabs stub methods, so
409 we don't need to handle this case. */
410 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
412 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
413 if (! is_constructor_name (phys_name
))
416 /* If this method is actually defined, include it in the
418 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
429 /* Helper function for decode_line_1.
430 Build a canonical line spec in CANONICAL if it is non-NULL and if
431 the SAL has a symtab.
432 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
433 If SYMNAME is NULL the line number from SAL is used and the canonical
434 line spec is `filename:linenum'. */
437 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
438 struct linespec_result
*canonical
)
440 char **canonical_arr
;
441 char *canonical_name
;
443 struct symtab
*s
= sal
->symtab
;
445 if (s
== (struct symtab
*) NULL
446 || s
->filename
== (char *) NULL
447 || canonical
== NULL
)
450 canonical_arr
= (char **) xmalloc (sizeof (char *));
451 canonical
->canonical
= canonical_arr
;
453 filename
= s
->filename
;
456 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
457 sprintf (canonical_name
, "%s:%s", filename
, symname
);
461 canonical_name
= xmalloc (strlen (filename
) + 30);
462 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
464 canonical_arr
[0] = canonical_name
;
469 /* Find an instance of the character C in the string S that is outside
470 of all parenthesis pairs, single-quoted strings, and double-quoted
471 strings. Also, ignore the char within a template name, like a ','
472 within foo<int, int>. */
475 find_toplevel_char (char *s
, char c
)
477 int quoted
= 0; /* zero if we're not in quotes;
478 '"' if we're in a double-quoted string;
479 '\'' if we're in a single-quoted string. */
480 int depth
= 0; /* Number of unclosed parens we've seen. */
483 for (scan
= s
; *scan
; scan
++)
489 else if (*scan
== '\\' && *(scan
+ 1))
492 else if (*scan
== c
&& ! quoted
&& depth
== 0)
494 else if (*scan
== '"' || *scan
== '\'')
496 else if (*scan
== '(' || *scan
== '<')
498 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
505 /* Determines if the gives string corresponds to an Objective-C method
506 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
507 are allowed to have spaces and parentheses in them. */
510 is_objc_method_format (const char *s
)
512 if (s
== NULL
|| *s
== '\0')
514 /* Handle arguments with the format FILENAME:SYMBOL. */
515 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
516 && (s
[2] == '[') && strchr(s
, ']'))
518 /* Handle arguments that are just SYMBOL. */
519 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
524 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
525 operate on (ask user if necessary).
526 If CANONICAL is non-NULL return a corresponding array of mangled names
527 as canonical line specs there. */
529 static struct symtabs_and_lines
530 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
531 struct linespec_result
*canonical
)
533 struct symtabs_and_lines values
, return_values
;
538 struct cleanup
*old_chain
;
539 char **canonical_arr
= (char **) NULL
;
540 const char *select_mode
= multiple_symbols_select_mode ();
542 if (select_mode
== multiple_symbols_cancel
)
543 error (_("canceled because the command is ambiguous\n"
544 "See set/show multiple-symbol."));
546 values
.sals
= (struct symtab_and_line
*)
547 alloca (nelts
* sizeof (struct symtab_and_line
));
548 return_values
.sals
= (struct symtab_and_line
*)
549 xmalloc (nelts
* sizeof (struct symtab_and_line
));
550 old_chain
= make_cleanup (xfree
, return_values
.sals
);
554 canonical_arr
= (char **) xmalloc (nelts
* sizeof (char *));
555 make_cleanup (xfree
, canonical_arr
);
556 memset (canonical_arr
, 0, nelts
* sizeof (char *));
557 canonical
->canonical
= canonical_arr
;
563 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
564 init_sal (&values
.sals
[i
]);
565 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
566 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
570 /* If select_mode is "all", then do not print the multiple-choice
571 menu and act as if the user had chosen choice "1" (all). */
572 if (select_mode
== multiple_symbols_all
573 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
578 printf_unfiltered (_("[0] cancel\n[1] all\n"));
581 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
583 if (values
.sals
[i
].symtab
)
584 printf_unfiltered ("[%d] %s at %s:%d\n",
586 SYMBOL_PRINT_NAME (sym_arr
[i
]),
587 values
.sals
[i
].symtab
->filename
,
588 values
.sals
[i
].line
);
590 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? "
591 "Probably broken debug info...]\n"),
593 SYMBOL_PRINT_NAME (sym_arr
[i
]),
594 values
.sals
[i
].line
);
598 printf_unfiltered (_("?HERE\n"));
602 prompt
= getenv ("PS2");
607 args
= command_line_input (prompt
, 0, "overload-choice");
610 if (args
== 0 || *args
== 0)
611 error_no_arg (_("one or more choice numbers"));
619 while (*arg1
>= '0' && *arg1
<= '9')
621 if (*arg1
&& *arg1
!= ' ' && *arg1
!= '\t')
622 error (_("Arguments must be choice numbers."));
627 error (_("canceled"));
632 for (i
= 0; i
< nelts
; i
++)
634 if (canonical_arr
[i
] == NULL
)
636 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[i
]);
637 canonical_arr
[i
] = xstrdup (symname
);
641 memcpy (return_values
.sals
, values
.sals
,
642 (nelts
* sizeof (struct symtab_and_line
)));
643 return_values
.nelts
= nelts
;
644 discard_cleanups (old_chain
);
645 return return_values
;
648 if (num
>= nelts
+ 2)
650 printf_unfiltered (_("No choice number %d.\n"), num
);
655 if (values
.sals
[num
].pc
)
659 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[num
]);
660 make_cleanup (xfree
, symname
);
661 canonical_arr
[i
] = xstrdup (symname
);
663 return_values
.sals
[i
++] = values
.sals
[num
];
664 values
.sals
[num
].pc
= 0;
668 printf_unfiltered (_("duplicate request for %d ignored.\n"),
674 while (*args
== ' ' || *args
== '\t')
677 return_values
.nelts
= i
;
678 discard_cleanups (old_chain
);
679 return return_values
;
682 /* Valid delimiters for linespec keywords "if", "thread" or "task". */
685 is_linespec_boundary (char c
)
687 return c
== ' ' || c
== '\t' || c
== '\0' || c
== ',';
690 /* A helper function for decode_line_1 and friends which skips P
691 past any method overload information at the beginning of P, e.g.,
692 "(const struct foo *)".
694 This function assumes that P has already been validated to contain
695 overload information, and it will assert if *P != '('. */
697 find_method_overload_end (char *p
)
701 gdb_assert (*p
== '(');
721 /* Keep important information used when looking up a name. This includes
722 template parameters, overload information, and important keywords, including
723 the possible Java trailing type. */
726 keep_name_info (char *p
, int on_boundary
)
728 const char *quotes
= get_gdb_completer_quote_characters ();
734 if (strchr (quotes
, *p
))
737 if (*p
== ',' && !nest
)
740 if (on_boundary
&& !nest
)
742 const char *const words
[] = { "if", "thread", "task" };
745 for (wordi
= 0; wordi
< ARRAY_SIZE (words
); wordi
++)
746 if (strncmp (p
, words
[wordi
], strlen (words
[wordi
])) == 0
747 && is_linespec_boundary (p
[strlen (words
[wordi
])]))
749 if (wordi
< ARRAY_SIZE (words
))
753 if (*p
== '(' || *p
== '<' || *p
== '[')
755 else if ((*p
== ')' || *p
== '>' || *p
== ']') && nest
> 0)
760 /* The ',' check could fail on "operator ,". */
761 p
+= cp_validate_operator (p
);
763 on_boundary
= is_linespec_boundary (p
[-1]);
766 while (p
> saved_p
&& is_linespec_boundary (p
[-1]))
773 /* The parser of linespec itself. */
775 /* Parse a string that specifies a line number.
776 Pass the address of a char * variable; that variable will be
777 advanced over the characters actually parsed.
781 LINENUM -- that line number in current file. PC returned is 0.
782 FILE:LINENUM -- that line in that file. PC returned is 0.
783 FUNCTION -- line number of openbrace of that function.
784 PC returned is the start of the function.
785 LABEL -- a label in the current scope
786 VARIABLE -- line number of definition of that variable.
788 FILE:FUNCTION -- likewise, but prefer functions in that file.
789 *EXPR -- line in which address EXPR appears.
791 This may all be followed by an "if EXPR", which we ignore.
793 FUNCTION may be an undebuggable function found in minimal symbol table.
795 If the argument FUNFIRSTLINE is nonzero, we want the first line
796 of real code inside a function when a function is specified, and it is
797 not OK to specify a variable or type to get its line number.
799 DEFAULT_SYMTAB specifies the file to use if none is specified.
800 It defaults to current_source_symtab.
801 DEFAULT_LINE specifies the line number to use for relative
802 line numbers (that start with signs). Defaults to current_source_line.
803 If CANONICAL is non-NULL, store an array of strings containing the canonical
804 line specs there if necessary. Currently overloaded member functions and
805 line numbers or static functions without a filename yield a canonical
806 line spec. The array and the line spec strings are allocated on the heap,
807 it is the callers responsibility to free them.
809 Note that it is possible to return zero for the symtab
810 if no file is validly specified. Callers must check that.
811 Also, the line number returned may be invalid. */
813 /* We allow single quotes in various places. This is a hideous
814 kludge, which exists because the completer can't yet deal with the
815 lack of single quotes. FIXME: write a linespec_completer which we
816 can use as appropriate instead of make_symbol_completion_list. */
818 struct symtabs_and_lines
819 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
820 int default_line
, struct linespec_result
*canonical
)
824 /* If a file name is specified, this is its symtab. */
825 struct symtab
*file_symtab
= NULL
;
828 /* This says whether or not something in *ARGPTR is quoted with
829 completer_quotes (i.e. with single quotes). */
831 /* Is *ARGPTR is enclosed in double quotes? */
832 int is_quote_enclosed
;
833 int is_objc_method
= 0;
834 char *saved_arg
= *argptr
;
835 /* If IS_QUOTED, the end of the quoted bit. */
836 char *end_quote
= NULL
;
837 /* Is *ARGPTR enclosed in single quotes? */
838 int is_squote_enclosed
= 0;
839 /* The "first half" of the linespec. */
842 /* If we are parsing `function:label', this holds the symbol for the
844 struct symbol
*function_symbol
= NULL
;
845 /* If FUNCTION_SYMBOL is not NULL, then this is the exception that
846 was thrown when trying to parse a filename. */
847 volatile struct gdb_exception file_exception
;
849 /* Defaults have defaults. */
851 initialize_defaults (&default_symtab
, &default_line
);
853 /* See if arg is *PC. */
856 return decode_indirect (argptr
);
858 is_quoted
= (strchr (get_gdb_completer_quote_characters (),
863 end_quote
= skip_quoted (*argptr
);
864 if (*end_quote
== '\0')
865 is_squote_enclosed
= 1;
868 /* Check to see if it's a multipart linespec (with colons or
871 /* Locate the end of the first half of the linespec.
872 After the call, for instance, if the argptr string is "foo.c:123"
873 p will point at "123". If there is only one part, like "foo", p
874 will point to "". If this is a C++ name, like "A::B::foo", p will
875 point to "::B::foo". Argptr is not changed by this call. */
877 first_half
= p
= locate_first_half (argptr
, &is_quote_enclosed
);
879 /* First things first: if ARGPTR starts with a filename, get its
880 symtab and strip the filename from ARGPTR. */
881 TRY_CATCH (file_exception
, RETURN_MASK_ERROR
)
883 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
);
886 if (file_exception
.reason
>= 0)
888 /* Check for single quotes on the non-filename part. */
889 is_quoted
= (**argptr
890 && strchr (get_gdb_completer_quote_characters (),
893 end_quote
= skip_quoted (*argptr
);
895 /* Locate the next "half" of the linespec. */
896 first_half
= p
= locate_first_half (argptr
, &is_quote_enclosed
);
899 /* Check if this is an Objective-C method (anything that starts with
900 a '+' or '-' and a '['). */
901 if (is_objc_method_format (p
))
904 /* Check if the symbol could be an Objective-C selector. */
907 struct symtabs_and_lines values
;
909 values
= decode_objc (argptr
, funfirstline
, file_symtab
,
910 canonical
, saved_arg
);
911 if (values
.sals
!= NULL
)
915 /* Does it look like there actually were two parts? */
917 if (p
[0] == ':' || p
[0] == '.')
919 /* Is it a C++ or Java compound data structure?
920 The check on p[1] == ':' is capturing the case of "::",
921 since p[0]==':' was checked above.
922 Note that the call to decode_compound does everything
923 for us, including the lookup on the symbol table, so we
926 if (p
[0] == '.' || p
[1] == ':')
928 struct symtabs_and_lines values
;
929 volatile struct gdb_exception ex
;
930 char *saved_argptr
= *argptr
;
932 if (is_quote_enclosed
)
935 /* Initialize it just to avoid a GCC false warning. */
936 memset (&values
, 0, sizeof (values
));
938 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
940 values
= decode_compound (argptr
, funfirstline
, canonical
,
941 file_symtab
, saved_arg
, p
);
943 if ((is_quoted
|| is_squote_enclosed
) && **argptr
== '\'')
944 *argptr
= *argptr
+ 1;
949 if (ex
.error
!= NOT_FOUND_ERROR
)
950 throw_exception (ex
);
952 *argptr
= saved_argptr
;
956 /* If there was an exception looking up a specified filename earlier,
957 then check whether we were really given `function:label'. */
958 if (file_exception
.reason
< 0)
960 function_symbol
= find_function_symbol (argptr
, p
,
962 /* If we did not find a function, re-throw the original
964 if (!function_symbol
)
965 throw_exception (file_exception
);
968 /* Check for single quotes on the non-filename part. */
971 is_quoted
= (**argptr
972 && strchr (get_gdb_completer_quote_characters (),
975 end_quote
= skip_quoted (*argptr
);
980 /* file_symtab is specified file's symtab, or 0 if no file specified.
981 If we are parsing `function:symbol', then FUNCTION_SYMBOL is the
982 function before the `:'.
983 arg no longer contains the file name. */
985 /* If the filename was quoted, we must re-check the quotation. */
987 if (end_quote
== first_half
&& *end_quote
!= '\0')
989 is_quoted
= (**argptr
990 && strchr (get_gdb_completer_quote_characters (),
993 end_quote
= skip_quoted (*argptr
);
996 /* Check whether arg is all digits (and sign). */
999 if (*q
== '-' || *q
== '+')
1001 while (*q
>= '0' && *q
<= '9')
1004 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ',')
1005 && function_symbol
== NULL
)
1006 /* We found a token consisting of all digits -- at least one digit. */
1007 return decode_all_digits (argptr
, default_symtab
, default_line
,
1008 canonical
, file_symtab
, q
);
1010 /* Arg token is not digits => try it as a variable name
1011 Find the next token (everything up to end or next whitespace). */
1013 if (**argptr
== '$') /* May be a convenience variable. */
1014 /* One or two $ chars possible. */
1015 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
1016 else if (is_quoted
|| is_squote_enclosed
)
1020 error (_("Unmatched single quote."));
1022 else if (is_objc_method
)
1024 /* allow word separators in method names for Obj-C. */
1025 p
= skip_quoted_chars (*argptr
, NULL
, "");
1029 p
= skip_quoted (*argptr
);
1032 /* Keep any important naming information. */
1033 p
= keep_name_info (p
, p
== saved_arg
|| is_linespec_boundary (p
[-1]));
1035 copy
= (char *) alloca (p
- *argptr
+ 1);
1036 memcpy (copy
, *argptr
, p
- *argptr
);
1037 copy
[p
- *argptr
] = '\0';
1040 && copy
[0] == copy
[p
- *argptr
- 1]
1041 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
1043 copy
[p
- *argptr
- 1] = '\0';
1046 else if (is_quoted
|| is_squote_enclosed
)
1047 copy
[p
- *argptr
- 1] = '\0';
1048 while (*p
== ' ' || *p
== '\t')
1052 /* If it starts with $: may be a legitimate variable or routine name
1053 (e.g. HP-UX millicode routines such as $$dyncall), or it may
1054 be history value, or it may be a convenience variable. */
1056 if (*copy
== '$' && function_symbol
== NULL
)
1057 return decode_dollar (copy
, funfirstline
, default_symtab
,
1058 canonical
, file_symtab
);
1060 /* Try the token as a label, but only if no file was specified,
1061 because we can only really find labels in the current scope. */
1065 struct symtabs_and_lines label_result
;
1066 if (decode_label (function_symbol
, copy
, canonical
, &label_result
))
1067 return label_result
;
1070 if (function_symbol
)
1071 throw_exception (file_exception
);
1073 /* Look up that token as a variable.
1074 If file specified, use that file's per-file block to start with. */
1076 return decode_variable (copy
, funfirstline
, canonical
, file_symtab
);
1081 /* Now, more helper functions for decode_line_1. Some conventions
1082 that these functions follow:
1084 Decode_line_1 typically passes along some of its arguments or local
1085 variables to the subfunctions. It passes the variables by
1086 reference if they are modified by the subfunction, and by value
1089 Some of the functions have side effects that don't arise from
1090 variables that are passed by reference. In particular, if a
1091 function is passed ARGPTR as an argument, it modifies what ARGPTR
1092 points to; typically, it advances *ARGPTR past whatever substring
1093 it has just looked at. (If it doesn't modify *ARGPTR, then the
1094 function gets passed *ARGPTR instead, which is then called ARG.)
1095 Also, functions that return a struct symtabs_and_lines may modify
1096 CANONICAL, as in the description of decode_line_1.
1098 If a function returns a struct symtabs_and_lines, then that struct
1099 will immediately make its way up the call chain to be returned by
1100 decode_line_1. In particular, all of the functions decode_XXX
1101 calculate the appropriate struct symtabs_and_lines, under the
1102 assumption that their argument is of the form XXX. */
1104 /* First, some functions to initialize stuff at the beggining of the
1108 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
1110 if (*default_symtab
== 0)
1112 /* Use whatever we have for the default source line. We don't use
1113 get_current_or_default_symtab_and_line as it can recurse and call
1115 struct symtab_and_line cursal
=
1116 get_current_source_symtab_and_line ();
1118 *default_symtab
= cursal
.symtab
;
1119 *default_line
= cursal
.line
;
1125 /* Decode arg of the form *PC. */
1127 static struct symtabs_and_lines
1128 decode_indirect (char **argptr
)
1130 struct symtabs_and_lines values
;
1134 pc
= value_as_address (parse_to_comma_and_eval (argptr
));
1136 values
.sals
= (struct symtab_and_line
*)
1137 xmalloc (sizeof (struct symtab_and_line
));
1140 values
.sals
[0] = find_pc_line (pc
, 0);
1141 values
.sals
[0].pc
= pc
;
1142 values
.sals
[0].section
= find_pc_overlay (pc
);
1143 values
.sals
[0].explicit_pc
= 1;
1150 /* Locate the first half of the linespec, ending in a colon, period,
1151 or whitespace. (More or less.) Also, check to see if *ARGPTR is
1152 enclosed in double quotes; if so, set is_quote_enclosed, advance
1153 ARGPTR past that and zero out the trailing double quote.
1154 If ARGPTR is just a simple name like "main", p will point to ""
1158 locate_first_half (char **argptr
, int *is_quote_enclosed
)
1164 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1165 and we must isolate the first half. Outer layers will call again later
1166 for the second half.
1168 Don't count commas that appear in argument lists of overloaded
1169 functions, or in quoted strings. It's stupid to go to this much
1170 trouble when the rest of the function is such an obvious roach hotel. */
1171 ii
= find_toplevel_char (*argptr
, ',');
1172 has_comma
= (ii
!= 0);
1174 /* Temporarily zap out second half to not confuse the code below.
1175 This is undone below. Do not change ii!! */
1181 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1182 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1188 *is_quote_enclosed
= 1;
1194 *is_quote_enclosed
= 0;
1195 if (strchr (get_gdb_completer_quote_characters (), *p
))
1205 char *temp_end
= find_template_name_end (p
);
1208 error (_("malformed template specification in command"));
1213 p
= find_method_overload_end (p
);
1215 /* Check for a colon and a plus or minus and a [ (which
1216 indicates an Objective-C method). */
1217 if (is_objc_method_format (p
))
1221 /* Check for the end of the first half of the linespec. End of
1222 line, a tab, a colon or a space. But if enclosed in double
1223 quotes we do not break on enclosed spaces. */
1227 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1229 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1231 /* Java qualified method. Find the *last* '.', since the
1232 others are package qualifiers. Stop at any open parenthesis
1233 which might provide overload information. */
1234 for (p1
= p
; *p1
&& *p1
!= '('; p1
++)
1242 while (p
[0] == ' ' || p
[0] == '\t')
1245 /* If the closing double quote was left at the end, remove it. */
1246 if (*is_quote_enclosed
)
1248 char *closing_quote
= strchr (p
- 1, '"');
1250 if (closing_quote
&& closing_quote
[1] == '\0')
1251 *closing_quote
= '\0';
1254 /* Now that we've safely parsed the first half, put back ',' so
1255 outer layers can see it. */
1264 /* Here's where we recognise an Objective-C Selector. An Objective C
1265 selector may be implemented by more than one class, therefore it
1266 may represent more than one method/function. This gives us a
1267 situation somewhat analogous to C++ overloading. If there's more
1268 than one method that could represent the selector, then use some of
1269 the existing C++ code to let the user choose one. */
1271 struct symtabs_and_lines
1272 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1273 struct linespec_result
*canonical
, char *saved_arg
)
1275 struct symtabs_and_lines values
;
1276 struct symbol
**sym_arr
= NULL
;
1277 struct symbol
*sym
= NULL
;
1278 struct block
*block
= NULL
;
1285 find_imps (file_symtab
, get_search_block (file_symtab
), *argptr
,
1290 sym_arr
= (struct symbol
**)
1291 alloca ((i1
+ 1) * sizeof (struct symbol
*));
1294 *argptr
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1297 /* i1 now represents the TOTAL number of matches found.
1298 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1299 which will come first in the sym_arr array. Any low-level
1300 (minimal_symbol) matches will follow those. */
1306 /* Already a struct symbol. */
1311 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1312 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]),
1313 SYMBOL_LINKAGE_NAME (sym
)) != 0)
1315 warning (_("debugging symbol \"%s\" does "
1316 "not match selector; ignoring"),
1317 SYMBOL_LINKAGE_NAME (sym
));
1322 values
.sals
= (struct symtab_and_line
*)
1323 xmalloc (sizeof (struct symtab_and_line
));
1326 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1328 /* Canonicalize this, so it remains resolved for dylib loads. */
1329 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1330 build_canonical_line_spec (values
.sals
,
1331 SYMBOL_NATURAL_NAME (sym
), canonical
);
1335 /* The only match was a non-debuggable symbol, which might point
1336 to a function descriptor; resolve it to the actual code address
1338 struct minimal_symbol
*msymbol
= (struct minimal_symbol
*)sym_arr
[0];
1339 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1340 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1341 CORE_ADDR pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
1343 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
, pc
,
1346 init_sal (&values
.sals
[0]);
1347 values
.sals
[0].pc
= pc
;
1354 /* More than one match. The user must choose one or more. */
1355 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1361 /* This handles C++ and Java compound data structures. P should point
1362 at the first component separator, i.e. double-colon or period. As
1363 an example, on entrance to this function we could have ARGPTR
1364 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1366 static struct symtabs_and_lines
1367 decode_compound (char **argptr
, int funfirstline
,
1368 struct linespec_result
*canonical
, struct symtab
*file_symtab
,
1369 char *the_real_saved_arg
, char *p
)
1371 struct symtabs_and_lines values
;
1373 char *saved_arg2
= *argptr
;
1377 struct symbol
*sym_class
;
1381 /* If the user specified any completer quote characters in the input,
1382 strip them. They are superfluous. */
1383 saved_arg
= alloca (strlen (the_real_saved_arg
) + 1);
1385 char *dst
= saved_arg
;
1386 char *src
= the_real_saved_arg
;
1387 char *quotes
= get_gdb_completer_quote_characters ();
1388 while (*src
!= '\0')
1390 if (strchr (quotes
, *src
) == NULL
)
1397 /* First check for "global" namespace specification, of the form
1398 "::foo". If found, skip over the colons and jump to normal
1399 symbol processing. I.e. the whole line specification starts with
1400 "::" (note the condition that *argptr == p). */
1402 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1405 /* Given our example "AAA::inA::fun", we have two cases to consider:
1407 1) AAA::inA is the name of a class. In that case, presumably it
1408 has a method called "fun"; we then look up that method using
1411 2) AAA::inA isn't the name of a class. In that case, either the
1412 user made a typo, AAA::inA is the name of a namespace, or it is
1413 the name of a minimal symbol.
1414 We just look up AAA::inA::fun with lookup_symbol. If that fails,
1415 try lookup_minimal_symbol.
1417 Thus, our first task is to find everything before the last set of
1418 double-colons and figure out if it's the name of a class. So we
1419 first loop through all of the double-colons. */
1421 p2
= p
; /* Save for restart. */
1423 /* This is very messy. Following the example above we have now the
1426 argptr -> "AAA::inA::fun
1427 saved_arg -> "AAA::inA::fun
1428 saved_arg2 -> "AAA::inA::fun
1429 p2 -> "::inA::fun". */
1431 /* In the loop below, with these strings, we'll make 2 passes, each
1432 is marked in comments. */
1436 static char *break_characters
= " \t(";
1438 /* Move pointer up to next possible class/namespace token. */
1440 p
= p2
+ 1; /* Restart with old value +1. */
1442 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1443 i.e. if there is a double-colon, p will now point to the
1445 /* PASS2: p2->"::fun", p->":fun" */
1447 /* Move pointer ahead to next double-colon. */
1449 && strchr (break_characters
, *p
) == NULL
1450 && strchr (get_gdb_completer_quote_characters (), *p
) == NULL
)
1452 if (current_language
->la_language
== language_cplus
)
1453 p
+= cp_validate_operator (p
);
1457 temp_end
= find_template_name_end (p
);
1459 error (_("malformed template specification in command"));
1462 /* Note that, since, at the start of this loop, p would be
1463 pointing to the second colon in a double-colon, we only
1464 satisfy the condition below if there is another
1465 double-colon to the right (after). I.e. there is another
1466 component that can be a class or a namespace. I.e, if at
1467 the beginning of this loop (PASS1), we had
1468 p->":inA::fun", we'll trigger this when p has been
1469 advanced to point to "::fun". */
1470 /* PASS2: we will not trigger this. */
1471 else if ((p
[0] == ':') && (p
[1] == ':'))
1472 break; /* Found double-colon. */
1475 /* PASS2: We'll keep getting here, until P points to one of the
1476 break characters, at which point we exit this loop. */
1480 && strncmp (&p
[1], CP_ANONYMOUS_NAMESPACE_STR
,
1481 CP_ANONYMOUS_NAMESPACE_LEN
) == 0)
1482 p
+= CP_ANONYMOUS_NAMESPACE_LEN
;
1483 else if (strchr (break_characters
, *p
) == NULL
)
1490 break; /* Out of the while (1). This would happen
1491 for instance if we have looked up
1492 unsuccessfully all the components of the
1493 string, and p->""(PASS2). */
1495 /* We get here if p points to one of the break characters or "" (i.e.,
1497 /* Save restart for next time around. */
1499 /* Restore argptr as it was on entry to this function. */
1500 *argptr
= saved_arg2
;
1501 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1504 /* All ready for next pass through the loop. */
1508 /* Start of lookup in the symbol tables. */
1510 /* Lookup in the symbol table the substring between argptr and
1511 p. Note, this call changes the value of argptr. */
1512 /* Before the call, argptr->"AAA::inA::fun",
1513 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1515 sym_class
= lookup_prefix_sym (argptr
, p2
, file_symtab
);
1517 /* If sym_class has been found, and if "AAA::inA" is a class, then
1518 we're in case 1 above. So we look up "fun" as a method of that
1521 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1522 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1523 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1525 /* Arg token is not digits => try it as a function name.
1526 Find the next token (everything up to end or next
1529 && strchr (get_gdb_completer_quote_characters (),
1532 p
= skip_quoted (*argptr
);
1533 *argptr
= *argptr
+ 1;
1537 /* At this point argptr->"fun". */
1541 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':'
1544 /* At this point p->"". String ended. */
1545 /* Nope, C++ operators could have spaces in them
1546 ("foo::operator <" or "foo::operator delete []").
1547 I apologize, this is a bit hacky... */
1548 if (current_language
->la_language
== language_cplus
1549 && *p
== ' ' && p
- 8 - *argptr
+ 1 > 0)
1551 /* The above loop has already swallowed "operator". */
1552 p
+= cp_validate_operator (p
- 8) - 8;
1555 /* Keep any important naming information. */
1556 p
= keep_name_info (p
, 1);
1559 /* Allocate our own copy of the substring between argptr and
1561 copy
= (char *) alloca (p
- *argptr
+ 1);
1562 memcpy (copy
, *argptr
, p
- *argptr
);
1563 copy
[p
- *argptr
] = '\0';
1565 && copy
[p
- *argptr
- 1]
1566 && strchr (get_gdb_completer_quote_characters (),
1567 copy
[p
- *argptr
- 1]) != NULL
)
1568 copy
[p
- *argptr
- 1] = '\0';
1570 /* At this point copy->"fun", p->"". */
1572 /* No line number may be specified. */
1573 while (*p
== ' ' || *p
== '\t')
1576 /* At this point arptr->"". */
1578 /* Look for copy as a method of sym_class. */
1579 /* At this point copy->"fun", sym_class is "AAA:inA",
1580 saved_arg->"AAA::inA::fun". This concludes the scanning of
1581 the string for possible components matches. If we find it
1582 here, we return. If not, and we are at the and of the string,
1583 we'll lookup the whole string in the symbol tables. */
1585 return find_method (funfirstline
, canonical
, saved_arg
, copy
, t
,
1586 sym_class
, file_symtab
);
1587 } /* End if symbol found. */
1590 /* We couldn't find a class, so we're in case 2 above. We check the
1591 entire name as a symbol instead. */
1593 p
= keep_name_info (p
, 1);
1595 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1596 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1597 /* Note: if is_quoted should be true, we snuff out quote here
1599 copy
[p
- saved_arg2
] = '\000';
1600 /* Set argptr to skip over the name. */
1601 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1603 /* Look up entire name. */
1604 sym
= lookup_symbol (copy
, get_selected_block (0), VAR_DOMAIN
, 0);
1606 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
, NULL
);
1609 struct minimal_symbol
*msym
;
1611 /* Couldn't find any interpretation as classes/namespaces. As a last
1612 resort, try the minimal symbol tables. */
1613 msym
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1615 return minsym_found (funfirstline
, msym
);
1618 /* Couldn't find a minimal symbol, either, so give up. */
1619 cplusplus_error (the_real_saved_arg
,
1620 "Can't find member of namespace, "
1621 "class, struct, or union named \"%s\"\n",
1625 /* Next come some helper functions for decode_compound. */
1627 /* Return the symbol corresponding to the substring of *ARGPTR ending
1628 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1629 name in question, the compound object separator ("::" or "."), and
1630 whitespace. Note that *ARGPTR is changed whether or not the
1631 lookup_symbol call finds anything (i.e we return NULL). As an
1632 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1634 static struct symbol
*
1635 lookup_prefix_sym (char **argptr
, char *p
, struct symtab
*file_symtab
)
1641 /* Extract the class name. */
1643 while (p
!= *argptr
&& p
[-1] == ' ')
1645 copy
= (char *) alloca (p
- *argptr
+ 1);
1646 memcpy (copy
, *argptr
, p
- *argptr
);
1647 copy
[p
- *argptr
] = 0;
1649 /* Discard the class name from the argptr. */
1650 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1651 while (*p
== ' ' || *p
== '\t')
1655 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1656 argptr->"inA::fun". */
1658 sym
= lookup_symbol (copy
, get_search_block (file_symtab
), STRUCT_DOMAIN
, 0);
1661 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1662 fail when the user attempts to lookup a method of a class
1663 via a typedef'd name (NOT via the class's name, which is already
1664 handled in symbol_matches_domain). So try the lookup again
1665 using VAR_DOMAIN (where typedefs live) and double-check that we
1666 found a struct/class type. */
1667 struct symbol
*s
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1671 struct type
*t
= SYMBOL_TYPE (s
);
1674 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
1682 /* This finds the method COPY in the class whose type is T and whose
1683 symbol is SYM_CLASS. */
1685 static struct symtabs_and_lines
1686 find_method (int funfirstline
, struct linespec_result
*canonical
,
1688 char *copy
, struct type
*t
, struct symbol
*sym_class
,
1689 struct symtab
*file_symtab
)
1691 struct symtabs_and_lines values
;
1692 struct symbol
*sym
= NULL
;
1693 int i1
; /* Counter for the symbol array. */
1694 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1695 * sizeof (struct symbol
*));
1697 /* Find all methods with a matching name, and put them in
1700 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
,
1703 /* If we were given a specific overload instance in COPY, defer the field
1704 acceptance till the strcmp_iw verification below, even if we found just
1705 a single field with that name. */
1706 if (i1
== 1 && strchr (copy
, '(') == NULL
)
1708 /* There is exactly one field with that name. */
1711 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1713 values
.sals
= (struct symtab_and_line
*)
1714 xmalloc (sizeof (struct symtab_and_line
));
1716 values
.sals
[0] = find_function_start_sal (sym
,
1728 /* If we were given a specific overload instance, use that
1729 (or error if no matches were found). Otherwise ask the user
1730 which one to use. */
1731 if (strchr (copy
, '('))
1736 struct cleanup
*cleanup
;
1738 /* Construct the proper search name based on SYM_CLASS and COPY.
1739 SAVED_ARG may contain a valid name, but that name might not be
1740 what is actually stored in the symbol table. For example,
1741 if SAVED_ARG (and SYM_CLASS) were found via an import
1742 ("using namespace" in C++), then the physname of
1743 SYM_CLASS ("A::myclass") may not be the same as SAVED_ARG
1745 name
= xmalloc (strlen (SYMBOL_NATURAL_NAME (sym_class
))
1746 + 2 /* "::" */ + strlen (copy
) + 1);
1747 strcpy (name
, SYMBOL_NATURAL_NAME (sym_class
));
1748 strcat (name
, "::");
1749 strcat (name
, copy
);
1750 canon
= cp_canonicalize_string (name
);
1756 cleanup
= make_cleanup (xfree
, name
);
1758 for (i
= 0; i
< i1
; ++i
)
1760 if (strcmp_iw (name
, SYMBOL_LINKAGE_NAME (sym_arr
[i
])) == 0)
1762 values
.sals
= (struct symtab_and_line
*)
1763 xmalloc (sizeof (struct symtab_and_line
));
1765 values
.sals
[0] = find_function_start_sal (sym_arr
[i
],
1767 do_cleanups (cleanup
);
1772 cplusplus_error (saved_arg
, _("the class `%s' does not have "
1773 "any method instance named %s"),
1774 SYMBOL_PRINT_NAME (sym_class
), copy
);
1777 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1782 cplusplus_error (saved_arg
,
1783 "the class `%s' does not have destructor defined\n",
1784 SYMBOL_PRINT_NAME (sym_class
));
1786 cplusplus_error (saved_arg
,
1787 "the class %s does not have any method named %s\n",
1788 SYMBOL_PRINT_NAME (sym_class
), copy
);
1794 /* Return the symtab associated to the filename given by the substring
1795 of *ARGPTR ending at P, and advance ARGPTR past that filename. */
1797 static struct symtab
*
1798 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
)
1802 struct symtab
*file_symtab
;
1805 while (p
!= *argptr
&& p
[-1] == ' ')
1807 if ((*p
== '"') && is_quote_enclosed
)
1809 copy
= (char *) alloca (p
- *argptr
+ 1);
1810 memcpy (copy
, *argptr
, p
- *argptr
);
1811 /* It may have the ending quote right after the file name. */
1812 if ((is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1813 || copy
[p
- *argptr
- 1] == '\'')
1814 copy
[p
- *argptr
- 1] = 0;
1816 copy
[p
- *argptr
] = 0;
1818 /* Find that file's data. */
1819 file_symtab
= lookup_symtab (copy
);
1820 if (file_symtab
== 0)
1822 if (!have_full_symbols () && !have_partial_symbols ())
1823 throw_error (NOT_FOUND_ERROR
,
1824 _("No symbol table is loaded. "
1825 "Use the \"file\" command."));
1826 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1829 /* Discard the file name from the arg. */
1831 while (*p
== ' ' || *p
== '\t')
1838 /* Look up a function symbol in *ARGPTR. If found, advance *ARGPTR
1839 and return the symbol. If not found, return NULL. */
1841 static struct symbol
*
1842 find_function_symbol (char **argptr
, char *p
, int is_quote_enclosed
)
1846 struct symbol
*function_symbol
;
1849 while (p
!= *argptr
&& p
[-1] == ' ')
1851 if ((*p
== '"') && is_quote_enclosed
)
1853 copy
= (char *) alloca (p
- *argptr
+ 1);
1854 memcpy (copy
, *argptr
, p
- *argptr
);
1855 /* It may have the ending quote right after the file name. */
1856 if ((is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1857 || copy
[p
- *argptr
- 1] == '\'')
1858 copy
[p
- *argptr
- 1] = 0;
1860 copy
[p
- *argptr
] = 0;
1862 function_symbol
= lookup_symbol (copy
, get_selected_block (0),
1864 if (!function_symbol
|| SYMBOL_CLASS (function_symbol
) != LOC_BLOCK
)
1867 /* Discard the file name from the arg. */
1869 while (*p
== ' ' || *p
== '\t')
1873 return function_symbol
;
1878 /* This decodes a line where the argument is all digits (possibly
1879 preceded by a sign). Q should point to the end of those digits;
1880 the other arguments are as usual. */
1882 static struct symtabs_and_lines
1883 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1884 int default_line
, struct linespec_result
*canonical
,
1885 struct symtab
*file_symtab
, char *q
)
1888 struct symtabs_and_lines values
;
1889 struct symtab_and_line val
;
1897 /* We might need a canonical line spec if no file was specified. */
1898 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1902 val
.pspace
= current_program_space
;
1904 /* This is where we need to make sure that we have good defaults.
1905 We must guarantee that this section of code is never executed
1906 when we are called with just a function name, since
1907 set_default_source_symtab_and_line uses
1908 select_source_symtab that calls us with such an argument. */
1910 if (file_symtab
== 0 && default_symtab
== 0)
1912 /* Make sure we have at least a default source file. */
1913 set_default_source_symtab_and_line ();
1914 initialize_defaults (&default_symtab
, &default_line
);
1917 if (**argptr
== '+')
1918 sign
= plus
, (*argptr
)++;
1919 else if (**argptr
== '-')
1920 sign
= minus
, (*argptr
)++;
1921 val
.line
= atoi (*argptr
);
1927 if (file_symtab
== 0)
1928 val
.line
= default_line
+ val
.line
;
1933 if (file_symtab
== 0)
1934 val
.line
= default_line
- val
.line
;
1939 break; /* No need to adjust val.line. */
1942 while (*q
== ' ' || *q
== '\t')
1945 if (file_symtab
== 0)
1946 file_symtab
= default_symtab
;
1948 /* It is possible that this source file has more than one symtab,
1949 and that the new line number specification has moved us from the
1950 default (in file_symtab) to a new one. */
1951 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1952 if (val
.symtab
== 0)
1953 val
.symtab
= file_symtab
;
1955 val
.pspace
= SYMTAB_PSPACE (val
.symtab
);
1957 values
.sals
= (struct symtab_and_line
*)
1958 xmalloc (sizeof (struct symtab_and_line
));
1959 values
.sals
[0] = val
;
1962 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1963 values
.sals
[0].explicit_line
= 1;
1969 /* Decode a linespec starting with a dollar sign. */
1971 static struct symtabs_and_lines
1972 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1973 struct linespec_result
*canonical
, struct symtab
*file_symtab
)
1977 int need_canonical
= 0;
1978 struct symtabs_and_lines values
;
1979 struct symtab_and_line val
;
1982 struct minimal_symbol
*msymbol
;
1984 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1985 while (*p
>= '0' && *p
<= '9')
1987 if (!*p
) /* Reached end of token without hitting non-digit. */
1989 /* We have a value history reference. */
1990 struct value
*val_history
;
1992 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1993 val_history
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1994 if (TYPE_CODE (value_type (val_history
)) != TYPE_CODE_INT
)
1995 error (_("History values used in line "
1996 "specs must have integer values."));
1997 valx
= value_as_long (val_history
);
2001 /* Not all digits -- may be user variable/function or a
2002 convenience variable. */
2004 /* Look up entire name as a symbol first. */
2005 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
2006 file_symtab
= (struct symtab
*) NULL
;
2008 /* Symbol was found --> jump to normal symbol processing. */
2010 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
, NULL
);
2012 /* If symbol was not found, look in minimal symbol tables. */
2013 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
2014 /* Min symbol was found --> jump to minsym processing. */
2016 return minsym_found (funfirstline
, msymbol
);
2018 /* Not a user variable or function -- must be convenience variable. */
2019 if (!get_internalvar_integer (lookup_internalvar (copy
+ 1), &valx
))
2020 error (_("Convenience variables used in line "
2021 "specs must have integer values."));
2026 /* Either history value or convenience value from above, in valx. */
2027 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
2030 val
.pspace
= current_program_space
;
2032 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
2033 values
.sals
[0] = val
;
2037 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
2044 /* A helper for decode_line_1 that tries to find a label. The label
2045 is searched for in the current block.
2046 FUNCTION_SYMBOL is the enclosing function; or NULL if none
2048 COPY is the name of the label to find.
2049 CANONICAL is the same as the "canonical" argument to decode_line_1.
2050 RESULT is a pointer to a symtabs_and_lines structure which will be
2051 filled in on success.
2052 This function returns 1 if a label was found, 0 otherwise. */
2055 decode_label (struct symbol
*function_symbol
, char *copy
,
2056 struct linespec_result
*canonical
,
2057 struct symtabs_and_lines
*result
)
2060 struct block
*block
;
2062 if (function_symbol
)
2063 block
= SYMBOL_BLOCK_VALUE (function_symbol
);
2066 block
= get_selected_block (0);
2068 block
&& !BLOCK_FUNCTION (block
);
2069 block
= BLOCK_SUPERBLOCK (block
))
2073 function_symbol
= BLOCK_FUNCTION (block
);
2076 sym
= lookup_symbol (copy
, block
, LABEL_DOMAIN
, 0);
2079 *result
= symbol_found (0, canonical
, copy
, sym
, NULL
, function_symbol
);
2084 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
2085 look in that symtab's static variables first. */
2087 static struct symtabs_and_lines
2088 decode_variable (char *copy
, int funfirstline
,
2089 struct linespec_result
*canonical
,
2090 struct symtab
*file_symtab
)
2093 struct minimal_symbol
*msymbol
;
2095 sym
= lookup_symbol (copy
, get_search_block (file_symtab
),
2099 return symbol_found (funfirstline
, canonical
, copy
, sym
, file_symtab
, NULL
);
2101 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
2103 if (msymbol
!= NULL
)
2104 return minsym_found (funfirstline
, msymbol
);
2106 if (!have_full_symbols ()
2107 && !have_partial_symbols ()
2108 && !have_minimal_symbols ())
2109 throw_error (NOT_FOUND_ERROR
,
2110 _("No symbol table is loaded. Use the \"file\" command."));
2111 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
2117 /* Now come some functions that are called from multiple places within
2120 /* We've found a symbol SYM to associate with our linespec; build a
2121 corresponding struct symtabs_and_lines. */
2123 static struct symtabs_and_lines
2124 symbol_found (int funfirstline
, struct linespec_result
*canonical
, char *copy
,
2125 struct symbol
*sym
, struct symtab
*file_symtab
,
2126 struct symbol
*function_symbol
)
2128 struct symtabs_and_lines values
;
2130 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
2132 /* Arg is the name of a function. */
2133 values
.sals
= (struct symtab_and_line
*)
2134 xmalloc (sizeof (struct symtab_and_line
));
2135 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
2138 /* Don't use the SYMBOL_LINE; if used at all it points to
2139 the line containing the parameters or thereabouts, not
2140 the first line of code. */
2142 /* We might need a canonical line spec if it is a static
2144 if (file_symtab
== 0)
2146 struct blockvector
*bv
= BLOCKVECTOR (SYMBOL_SYMTAB (sym
));
2147 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
2149 if (lookup_block_symbol (b
, copy
, VAR_DOMAIN
) != NULL
)
2150 build_canonical_line_spec (values
.sals
, copy
, canonical
);
2156 if (SYMBOL_CLASS (sym
) == LOC_LABEL
&& SYMBOL_VALUE_ADDRESS (sym
) != 0)
2158 /* We know its line number. */
2159 values
.sals
= (struct symtab_and_line
*)
2160 xmalloc (sizeof (struct symtab_and_line
));
2162 init_sal (&values
.sals
[0]);
2163 values
.sals
[0].symtab
= SYMBOL_SYMTAB (sym
);
2164 values
.sals
[0].line
= SYMBOL_LINE (sym
);
2165 values
.sals
[0].pc
= SYMBOL_VALUE_ADDRESS (sym
);
2166 values
.sals
[0].pspace
= SYMTAB_PSPACE (SYMBOL_SYMTAB (sym
));
2167 values
.sals
[0].explicit_pc
= 1;
2171 canonical
->special_display
= 1;
2172 canonical
->canonical
= xmalloc (sizeof (char *));
2173 canonical
->canonical
[0]
2174 = xstrprintf ("%s:%s",
2175 SYMBOL_NATURAL_NAME (function_symbol
),
2176 SYMBOL_NATURAL_NAME (sym
));
2181 else if (funfirstline
)
2183 /* NOT_FOUND_ERROR is not correct but it ensures COPY will be
2184 searched also as a minimal symbol. */
2186 throw_error (NOT_FOUND_ERROR
, _("\"%s\" is not a function"), copy
);
2188 else if (SYMBOL_LINE (sym
) != 0)
2190 /* We know its line number. */
2191 values
.sals
= (struct symtab_and_line
*)
2192 xmalloc (sizeof (struct symtab_and_line
));
2194 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
2195 values
.sals
[0].symtab
= SYMBOL_SYMTAB (sym
);
2196 values
.sals
[0].line
= SYMBOL_LINE (sym
);
2197 values
.sals
[0].pspace
= SYMTAB_PSPACE (SYMBOL_SYMTAB (sym
));
2201 /* This can happen if it is compiled with a compiler which doesn't
2202 put out line numbers for variables. */
2203 /* FIXME: Shouldn't we just set .line and .symtab to zero
2204 and return? For example, "info line foo" could print
2206 error (_("Line number not known for symbol \"%s\""), copy
);
2210 /* We've found a minimal symbol MSYMBOL to associate with our
2211 linespec; build a corresponding struct symtabs_and_lines. */
2213 static struct symtabs_and_lines
2214 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
2216 struct objfile
*objfile
= msymbol_objfile (msymbol
);
2217 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2218 struct symtabs_and_lines values
;
2221 values
.sals
= (struct symtab_and_line
*)
2222 xmalloc (sizeof (struct symtab_and_line
));
2223 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
2224 (struct obj_section
*) 0, 0);
2225 values
.sals
[0].section
= SYMBOL_OBJ_SECTION (msymbol
);
2227 /* The minimal symbol might point to a function descriptor;
2228 resolve it to the actual code address instead. */
2229 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
,
2232 if (pc
!= values
.sals
[0].pc
)
2233 values
.sals
[0] = find_pc_sect_line (pc
, NULL
, 0);
2236 skip_prologue_sal (&values
.sals
[0]);
2243 init_linespec_result (struct linespec_result
*lr
)
2245 memset (lr
, 0, sizeof (*lr
));