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 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 /* We share this one with symtab.c, but it is not exported widely. */
47 extern char *operator_chars (char *, char **);
49 /* Prototypes for local functions */
51 static void initialize_defaults (struct symtab
**default_symtab
,
54 static struct symtabs_and_lines
decode_indirect (char **argptr
);
56 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
58 static struct symtabs_and_lines
decode_objc (char **argptr
,
60 struct symtab
*file_symtab
,
64 static struct symtabs_and_lines
decode_compound (char **argptr
,
71 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
73 static struct symtabs_and_lines
find_method (int funfirstline
,
78 struct symbol
*sym_class
,
81 static void cplusplus_error (const char *name
, const char *fmt
, ...)
82 ATTRIBUTE_NORETURN
ATTRIBUTE_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
);
139 symtabs_and_lines
minsym_found (int funfirstline
,
140 struct minimal_symbol
*msymbol
);
142 /* Helper functions. */
144 /* Issue a helpful hint on using the command completion feature on
145 single quoted demangled C++ symbols as part of the completion
149 cplusplus_error (const char *name
, const char *fmt
, ...)
151 struct ui_file
*tmp_stream
;
154 tmp_stream
= mem_fileopen ();
155 make_cleanup_ui_file_delete (tmp_stream
);
160 va_start (args
, fmt
);
161 vfprintf_unfiltered (tmp_stream
, fmt
, args
);
165 while (*name
== '\'')
167 fprintf_unfiltered (tmp_stream
,
168 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
169 "(Note leading single quote.)"),
172 message
= ui_file_xstrdup (tmp_stream
, NULL
);
173 make_cleanup (xfree
, message
);
174 throw_error (NOT_FOUND_ERROR
, "%s", message
);
177 /* Return the number of methods described for TYPE, including the
178 methods from types it derives from. This can't be done in the symbol
179 reader because the type of the baseclass might still be stubbed
180 when the definition of the derived class is parsed. */
183 total_number_of_methods (struct type
*type
)
188 CHECK_TYPEDEF (type
);
189 if (! HAVE_CPLUS_STRUCT (type
))
191 count
= TYPE_NFN_FIELDS_TOTAL (type
);
193 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
194 count
+= total_number_of_methods (TYPE_BASECLASS (type
, n
));
199 /* Recursive helper function for decode_line_1.
200 Look for methods named NAME in type T.
201 Return number of matches.
202 Put matches in SYM_ARR, which should have been allocated with
203 a size of total_number_of_methods (T) * sizeof (struct symbol *).
204 Note that this function is g++ specific. */
207 find_methods (struct type
*t
, char *name
, enum language language
,
208 struct symbol
**sym_arr
)
212 char *class_name
= type_name_no_tag (t
);
214 /* Ignore this class if it doesn't have a name. This is ugly, but
215 unless we figure out how to get the physname without the name of
216 the class, then the loop can't do any good. */
218 && (lookup_symbol_in_language (class_name
, (struct block
*) NULL
,
219 STRUCT_DOMAIN
, language
, (int *) NULL
)))
222 int name_len
= strlen (name
);
226 /* Loop over each method name. At this level, all overloads of a name
227 are counted as a single name. There is an inner loop which loops over
230 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
234 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
237 if (strncmp (method_name
, "__", 2) == 0 ||
238 strncmp (method_name
, "op", 2) == 0 ||
239 strncmp (method_name
, "type", 4) == 0)
241 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
242 method_name
= dem_opname
;
243 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
244 method_name
= dem_opname
;
247 if (strcmp_iw (name
, method_name
) == 0)
248 /* Find all the overloaded methods with that name. */
249 i1
+= add_matching_methods (method_counter
, t
, language
,
251 else if (strncmp (class_name
, name
, name_len
) == 0
252 && (class_name
[name_len
] == '\0'
253 || class_name
[name_len
] == '<'))
254 i1
+= add_constructors (method_counter
, t
, language
,
259 /* Only search baseclasses if there is no match yet, since names in
260 derived classes override those in baseclasses.
262 FIXME: The above is not true; it is only true of member functions
263 if they have the same number of arguments (??? - section 13.1 of the
264 ARM says the function members are not in the same scope but doesn't
265 really spell out the rules in a way I understand. In any case, if
266 the number of arguments differ this is a case in which we can overload
267 rather than hiding without any problem, and gcc 2.4.5 does overload
268 rather than hiding in this case). */
271 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
272 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
273 language
, sym_arr
+ i1
);
278 /* Add the symbols associated to methods of the class whose type is T
279 and whose name matches the method indexed by METHOD_COUNTER in the
280 array SYM_ARR. Return the number of methods added. */
283 add_matching_methods (int method_counter
, struct type
*t
,
284 enum language language
, struct symbol
**sym_arr
)
289 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
296 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
298 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
302 tmp_name
= gdb_mangle_name (t
,
305 phys_name
= alloca (strlen (tmp_name
) + 1);
306 strcpy (phys_name
, tmp_name
);
310 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
312 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
320 /* This error message gets printed, but the method
321 still seems to be found
322 fputs_filtered("(Cannot find method ", gdb_stdout);
323 fprintf_symbol_filtered (gdb_stdout, phys_name,
325 DMGL_PARAMS | DMGL_ANSI);
326 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
334 /* Add the symbols associated to constructors of the class whose type
335 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
336 array SYM_ARR. Return the number of methods added. */
339 add_constructors (int method_counter
, struct type
*t
,
340 enum language language
, struct symbol
**sym_arr
)
345 /* For GCC 3.x and stabs, constructors and destructors
346 have names like __base_ctor and __complete_dtor.
347 Check the physname for now if we're looking for a
350 = TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
357 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
359 /* GCC 3.x will never produce stabs stub methods, so
360 we don't need to handle this case. */
361 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
363 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
364 if (! is_constructor_name (phys_name
))
367 /* If this method is actually defined, include it in the
369 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
380 /* Helper function for decode_line_1.
381 Build a canonical line spec in CANONICAL if it is non-NULL and if
382 the SAL has a symtab.
383 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
384 If SYMNAME is NULL the line number from SAL is used and the canonical
385 line spec is `filename:linenum'. */
388 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
391 char **canonical_arr
;
392 char *canonical_name
;
394 struct symtab
*s
= sal
->symtab
;
396 if (s
== (struct symtab
*) NULL
397 || s
->filename
== (char *) NULL
398 || canonical
== (char ***) NULL
)
401 canonical_arr
= (char **) xmalloc (sizeof (char *));
402 *canonical
= canonical_arr
;
404 filename
= s
->filename
;
407 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
408 sprintf (canonical_name
, "%s:%s", filename
, symname
);
412 canonical_name
= xmalloc (strlen (filename
) + 30);
413 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
415 canonical_arr
[0] = canonical_name
;
420 /* Find an instance of the character C in the string S that is outside
421 of all parenthesis pairs, single-quoted strings, and double-quoted
422 strings. Also, ignore the char within a template name, like a ','
423 within foo<int, int>. */
426 find_toplevel_char (char *s
, char c
)
428 int quoted
= 0; /* zero if we're not in quotes;
429 '"' if we're in a double-quoted string;
430 '\'' if we're in a single-quoted string. */
431 int depth
= 0; /* Number of unclosed parens we've seen. */
434 for (scan
= s
; *scan
; scan
++)
440 else if (*scan
== '\\' && *(scan
+ 1))
443 else if (*scan
== c
&& ! quoted
&& depth
== 0)
445 else if (*scan
== '"' || *scan
== '\'')
447 else if (*scan
== '(' || *scan
== '<')
449 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
456 /* Determines if the gives string corresponds to an Objective-C method
457 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
458 are allowed to have spaces and parentheses in them. */
461 is_objc_method_format (const char *s
)
463 if (s
== NULL
|| *s
== '\0')
465 /* Handle arguments with the format FILENAME:SYMBOL. */
466 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
467 && (s
[2] == '[') && strchr(s
, ']'))
469 /* Handle arguments that are just SYMBOL. */
470 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
475 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
476 operate on (ask user if necessary).
477 If CANONICAL is non-NULL return a corresponding array of mangled names
478 as canonical line specs there. */
480 static struct symtabs_and_lines
481 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
484 struct symtabs_and_lines values
, return_values
;
489 struct cleanup
*old_chain
;
490 char **canonical_arr
= (char **) NULL
;
491 const char *select_mode
= multiple_symbols_select_mode ();
493 if (select_mode
== multiple_symbols_cancel
)
495 canceled because the command is ambiguous\n\
496 See set/show multiple-symbol."));
498 values
.sals
= (struct symtab_and_line
*)
499 alloca (nelts
* sizeof (struct symtab_and_line
));
500 return_values
.sals
= (struct symtab_and_line
*)
501 xmalloc (nelts
* sizeof (struct symtab_and_line
));
502 old_chain
= make_cleanup (xfree
, return_values
.sals
);
506 canonical_arr
= (char **) xmalloc (nelts
* sizeof (char *));
507 make_cleanup (xfree
, canonical_arr
);
508 memset (canonical_arr
, 0, nelts
* sizeof (char *));
509 *canonical
= canonical_arr
;
515 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
516 init_sal (&values
.sals
[i
]);
517 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
518 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
522 /* If select_mode is "all", then do not print the multiple-choice
523 menu and act as if the user had chosen choice "1" (all). */
524 if (select_mode
== multiple_symbols_all
525 || ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())))
530 printf_unfiltered (_("[0] cancel\n[1] all\n"));
533 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
535 if (values
.sals
[i
].symtab
)
536 printf_unfiltered ("[%d] %s at %s:%d\n",
538 SYMBOL_PRINT_NAME (sym_arr
[i
]),
539 values
.sals
[i
].symtab
->filename
,
540 values
.sals
[i
].line
);
542 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"),
544 SYMBOL_PRINT_NAME (sym_arr
[i
]),
545 values
.sals
[i
].line
);
549 printf_unfiltered (_("?HERE\n"));
553 prompt
= getenv ("PS2");
558 args
= command_line_input (prompt
, 0, "overload-choice");
561 if (args
== 0 || *args
== 0)
562 error_no_arg (_("one or more choice numbers"));
570 while (*arg1
>= '0' && *arg1
<= '9')
572 if (*arg1
&& *arg1
!= ' ' && *arg1
!= '\t')
573 error (_("Arguments must be choice numbers."));
578 error (_("canceled"));
583 for (i
= 0; i
< nelts
; i
++)
585 if (canonical_arr
[i
] == NULL
)
587 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[i
]);
588 canonical_arr
[i
] = xstrdup (symname
);
592 memcpy (return_values
.sals
, values
.sals
,
593 (nelts
* sizeof (struct symtab_and_line
)));
594 return_values
.nelts
= nelts
;
595 discard_cleanups (old_chain
);
596 return return_values
;
599 if (num
>= nelts
+ 2)
601 printf_unfiltered (_("No choice number %d.\n"), num
);
606 if (values
.sals
[num
].pc
)
610 symname
= SYMBOL_LINKAGE_NAME (sym_arr
[num
]);
611 make_cleanup (xfree
, symname
);
612 canonical_arr
[i
] = xstrdup (symname
);
614 return_values
.sals
[i
++] = values
.sals
[num
];
615 values
.sals
[num
].pc
= 0;
619 printf_unfiltered (_("duplicate request for %d ignored.\n"), num
);
624 while (*args
== ' ' || *args
== '\t')
627 return_values
.nelts
= i
;
628 discard_cleanups (old_chain
);
629 return return_values
;
632 /* A helper function for decode_line_1 and friends which skips P
633 past any method overload information at the beginning of P, e.g.,
634 "(const struct foo *)".
636 This function assumes that P has already been validated to contain
637 overload information, and it will assert if *P != '('. */
639 find_method_overload_end (char *p
)
643 gdb_assert (*p
== '(');
663 /* The parser of linespec itself. */
665 /* Parse a string that specifies a line number.
666 Pass the address of a char * variable; that variable will be
667 advanced over the characters actually parsed.
671 LINENUM -- that line number in current file. PC returned is 0.
672 FILE:LINENUM -- that line in that file. PC returned is 0.
673 FUNCTION -- line number of openbrace of that function.
674 PC returned is the start of the function.
675 VARIABLE -- line number of definition of that variable.
677 FILE:FUNCTION -- likewise, but prefer functions in that file.
678 *EXPR -- line in which address EXPR appears.
680 This may all be followed by an "if EXPR", which we ignore.
682 FUNCTION may be an undebuggable function found in minimal symbol table.
684 If the argument FUNFIRSTLINE is nonzero, we want the first line
685 of real code inside a function when a function is specified, and it is
686 not OK to specify a variable or type to get its line number.
688 DEFAULT_SYMTAB specifies the file to use if none is specified.
689 It defaults to current_source_symtab.
690 DEFAULT_LINE specifies the line number to use for relative
691 line numbers (that start with signs). Defaults to current_source_line.
692 If CANONICAL is non-NULL, store an array of strings containing the canonical
693 line specs there if necessary. Currently overloaded member functions and
694 line numbers or static functions without a filename yield a canonical
695 line spec. The array and the line spec strings are allocated on the heap,
696 it is the callers responsibility to free them.
698 Note that it is possible to return zero for the symtab
699 if no file is validly specified. Callers must check that.
700 Also, the line number returned may be invalid.
702 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
703 on whether or not failure occurs due to an unknown function or file. In the case
704 where failure does occur due to an unknown function or file, do not issue an error
707 /* We allow single quotes in various places. This is a hideous
708 kludge, which exists because the completer can't yet deal with the
709 lack of single quotes. FIXME: write a linespec_completer which we
710 can use as appropriate instead of make_symbol_completion_list. */
712 struct symtabs_and_lines
713 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
714 int default_line
, char ***canonical
, int *not_found_ptr
)
718 /* If a file name is specified, this is its symtab. */
719 struct symtab
*file_symtab
= NULL
;
722 /* This says whether or not something in *ARGPTR is quoted with
723 completer_quotes (i.e. with single quotes). */
725 /* Is *ARGPTR is enclosed in double quotes? */
726 int is_quote_enclosed
;
727 int is_objc_method
= 0;
728 char *saved_arg
= *argptr
;
729 /* If IS_QUOTED, the end of the quoted bit. */
730 char *end_quote
= NULL
;
731 /* The "first half" of the linespec. */
737 /* Defaults have defaults. */
739 initialize_defaults (&default_symtab
, &default_line
);
741 /* See if arg is *PC. */
744 return decode_indirect (argptr
);
747 && strchr (get_gdb_completer_quote_characters (),
750 end_quote
= skip_quoted (*argptr
);
752 /* Check to see if it's a multipart linespec (with colons or
755 /* Locate the end of the first half of the linespec.
756 After the call, for instance, if the argptr string is "foo.c:123"
757 p will point at "123". If there is only one part, like "foo", p
758 will point to "". If this is a C++ name, like "A::B::foo", p will
759 point to "::B::foo". Argptr is not changed by this call. */
761 first_half
= p
= locate_first_half (argptr
, &is_quote_enclosed
);
763 /* Check if this is an Objective-C method (anything that starts with
764 a '+' or '-' and a '['). */
765 if (is_objc_method_format (p
))
768 /* Check if the symbol could be an Objective-C selector. */
771 struct symtabs_and_lines values
;
773 values
= decode_objc (argptr
, funfirstline
, NULL
,
774 canonical
, saved_arg
);
775 if (values
.sals
!= NULL
)
779 /* Does it look like there actually were two parts? */
781 if (p
[0] == ':' || p
[0] == '.')
783 /* Is it a C++ or Java compound data structure?
784 The check on p[1] == ':' is capturing the case of "::",
785 since p[0]==':' was checked above.
786 Note that the call to decode_compound does everything
787 for us, including the lookup on the symbol table, so we
790 if (p
[0] == '.' || p
[1] == ':')
792 struct symtabs_and_lines values
;
794 if (is_quote_enclosed
)
796 values
= decode_compound (argptr
, funfirstline
, canonical
,
797 saved_arg
, p
, not_found_ptr
);
798 if (is_quoted
&& **argptr
== '\'')
799 *argptr
= *argptr
+ 1;
803 /* No, the first part is a filename; set file_symtab to be that file's
804 symtab. Also, move argptr past the filename. */
806 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
,
809 /* Check for single quotes on the non-filename part. */
812 is_quoted
= (**argptr
813 && strchr (get_gdb_completer_quote_characters (),
816 end_quote
= skip_quoted (*argptr
);
820 /* file_symtab is specified file's symtab, or 0 if no file specified.
821 arg no longer contains the file name. */
823 /* If the filename was quoted, we must re-check the quotation. */
825 if (end_quote
== first_half
&& *end_quote
!= '\0')
827 is_quoted
= (**argptr
828 && strchr (get_gdb_completer_quote_characters (),
831 end_quote
= skip_quoted (*argptr
);
834 /* Check whether arg is all digits (and sign). */
837 if (*q
== '-' || *q
== '+')
839 while (*q
>= '0' && *q
<= '9')
842 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
843 /* We found a token consisting of all digits -- at least one digit. */
844 return decode_all_digits (argptr
, default_symtab
, default_line
,
845 canonical
, file_symtab
, q
);
847 /* Arg token is not digits => try it as a variable name
848 Find the next token (everything up to end or next whitespace). */
850 if (**argptr
== '$') /* May be a convenience variable. */
851 /* One or two $ chars possible. */
852 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
857 error (_("Unmatched single quote."));
859 else if (is_objc_method
)
861 /* allow word separators in method names for Obj-C */
862 p
= skip_quoted_chars (*argptr
, NULL
, "");
866 p
= skip_quoted (*argptr
);
869 /* Keep any template parameters */
871 p
= find_template_name_end (p
);
873 /* Keep method overload information. */
875 p
= find_method_overload_end (p
);
877 /* Make sure we keep important kewords like "const" */
878 if (strncmp (p
, " const", 6) == 0)
881 copy
= (char *) alloca (p
- *argptr
+ 1);
882 memcpy (copy
, *argptr
, p
- *argptr
);
883 copy
[p
- *argptr
] = '\0';
886 && copy
[0] == copy
[p
- *argptr
- 1]
887 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
889 copy
[p
- *argptr
- 1] = '\0';
893 copy
[p
- *argptr
- 1] = '\0';
894 while (*p
== ' ' || *p
== '\t')
898 /* If it starts with $: may be a legitimate variable or routine name
899 (e.g. HP-UX millicode routines such as $$dyncall), or it may
900 be history value, or it may be a convenience variable. */
903 return decode_dollar (copy
, funfirstline
, default_symtab
,
904 canonical
, file_symtab
);
906 /* Look up that token as a variable.
907 If file specified, use that file's per-file block to start with. */
909 return decode_variable (copy
, funfirstline
, canonical
,
910 file_symtab
, not_found_ptr
);
915 /* Now, more helper functions for decode_line_1. Some conventions
916 that these functions follow:
918 Decode_line_1 typically passes along some of its arguments or local
919 variables to the subfunctions. It passes the variables by
920 reference if they are modified by the subfunction, and by value
923 Some of the functions have side effects that don't arise from
924 variables that are passed by reference. In particular, if a
925 function is passed ARGPTR as an argument, it modifies what ARGPTR
926 points to; typically, it advances *ARGPTR past whatever substring
927 it has just looked at. (If it doesn't modify *ARGPTR, then the
928 function gets passed *ARGPTR instead, which is then called ARG.)
929 Also, functions that return a struct symtabs_and_lines may modify
930 CANONICAL, as in the description of decode_line_1.
932 If a function returns a struct symtabs_and_lines, then that struct
933 will immediately make its way up the call chain to be returned by
934 decode_line_1. In particular, all of the functions decode_XXX
935 calculate the appropriate struct symtabs_and_lines, under the
936 assumption that their argument is of the form XXX. */
938 /* First, some functions to initialize stuff at the beggining of the
942 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
944 if (*default_symtab
== 0)
946 /* Use whatever we have for the default source line. We don't use
947 get_current_or_default_symtab_and_line as it can recurse and call
949 struct symtab_and_line cursal
=
950 get_current_source_symtab_and_line ();
952 *default_symtab
= cursal
.symtab
;
953 *default_line
= cursal
.line
;
959 /* Decode arg of the form *PC. */
961 static struct symtabs_and_lines
962 decode_indirect (char **argptr
)
964 struct symtabs_and_lines values
;
968 pc
= parse_and_eval_address_1 (argptr
);
970 values
.sals
= (struct symtab_and_line
*)
971 xmalloc (sizeof (struct symtab_and_line
));
974 values
.sals
[0] = find_pc_line (pc
, 0);
975 values
.sals
[0].pc
= pc
;
976 values
.sals
[0].section
= find_pc_overlay (pc
);
977 values
.sals
[0].explicit_pc
= 1;
984 /* Locate the first half of the linespec, ending in a colon, period,
985 or whitespace. (More or less.) Also, check to see if *ARGPTR is
986 enclosed in double quotes; if so, set is_quote_enclosed, advance
987 ARGPTR past that and zero out the trailing double quote.
988 If ARGPTR is just a simple name like "main", p will point to ""
992 locate_first_half (char **argptr
, int *is_quote_enclosed
)
998 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
999 and we must isolate the first half. Outer layers will call again later
1000 for the second half.
1002 Don't count commas that appear in argument lists of overloaded
1003 functions, or in quoted strings. It's stupid to go to this much
1004 trouble when the rest of the function is such an obvious roach hotel. */
1005 ii
= find_toplevel_char (*argptr
, ',');
1006 has_comma
= (ii
!= 0);
1008 /* Temporarily zap out second half to not confuse the code below.
1009 This is undone below. Do not change ii!! */
1015 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1016 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1022 *is_quote_enclosed
= 1;
1028 *is_quote_enclosed
= 0;
1029 if (strchr (get_gdb_completer_quote_characters (), *p
))
1039 char *temp_end
= find_template_name_end (p
);
1042 error (_("malformed template specification in command"));
1045 /* Check for a colon and a plus or minus and a [ (which
1046 indicates an Objective-C method) */
1047 if (is_objc_method_format (p
))
1051 /* Check for the end of the first half of the linespec. End of
1052 line, a tab, a double colon or the last single colon, or a
1053 space. But if enclosed in double quotes we do not break on
1058 && ((p
[1] == ':') || (strchr (p
+ 1, ':') == NULL
)))
1059 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1061 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1063 /* Java qualified method. Find the *last* '.', since the
1064 others are package qualifiers. Stop at any open parenthesis
1065 which might provide overload information. */
1066 for (p1
= p
; *p1
&& *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, '"');
1082 if (closing_quote
&& closing_quote
[1] == '\0')
1083 *closing_quote
= '\0';
1086 /* Now that we've safely parsed the first half, put back ',' so
1087 outer layers can see it. */
1096 /* Here's where we recognise an Objective-C Selector. An Objective C
1097 selector may be implemented by more than one class, therefore it
1098 may represent more than one method/function. This gives us a
1099 situation somewhat analogous to C++ overloading. If there's more
1100 than one method that could represent the selector, then use some of
1101 the existing C++ code to let the user choose one. */
1103 struct symtabs_and_lines
1104 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1105 char ***canonical
, char *saved_arg
)
1107 struct symtabs_and_lines values
;
1108 struct symbol
**sym_arr
= NULL
;
1109 struct symbol
*sym
= NULL
;
1111 struct block
*block
= NULL
;
1118 if (file_symtab
!= NULL
)
1119 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
), STATIC_BLOCK
);
1122 enum language save_language
;
1124 /* get_selected_block can change the current language when there is
1125 no selected frame yet. */
1126 save_language
= current_language
->la_language
;
1127 block
= get_selected_block (0);
1128 set_language (save_language
);
1131 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1135 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1138 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1142 /* i1 now represents the TOTAL number of matches found.
1143 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1144 which will come first in the sym_arr array. Any low-level
1145 (minimal_symbol) matches will follow those. */
1151 /* Already a struct symbol. */
1156 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1157 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1159 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1164 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1167 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1169 /* Canonicalize this, so it remains resolved for dylib loads. */
1170 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1171 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1175 /* The only match was a non-debuggable symbol, which might point
1176 to a function descriptor; resolve it to the actual code address
1178 struct minimal_symbol
*msymbol
= (struct minimal_symbol
*)sym_arr
[0];
1179 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1180 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1181 CORE_ADDR pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
1183 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
, pc
,
1186 init_sal (&values
.sals
[0]);
1187 values
.sals
[0].pc
= pc
;
1194 /* More than one match. The user must choose one or more. */
1195 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1201 /* This handles C++ and Java compound data structures. P should point
1202 at the first component separator, i.e. double-colon or period. As
1203 an example, on entrance to this function we could have ARGPTR
1204 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1206 static struct symtabs_and_lines
1207 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1208 char *saved_arg
, char *p
, int *not_found_ptr
)
1210 struct symtabs_and_lines values
;
1212 char *saved_arg2
= *argptr
;
1216 struct symbol
*sym_class
;
1218 char *saved_java_argptr
= NULL
;
1220 /* First check for "global" namespace specification, of the form
1221 "::foo". If found, skip over the colons and jump to normal
1222 symbol processing. I.e. the whole line specification starts with
1223 "::" (note the condition that *argptr == p). */
1225 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1228 /* Given our example "AAA::inA::fun", we have two cases to consider:
1230 1) AAA::inA is the name of a class. In that case, presumably it
1231 has a method called "fun"; we then look up that method using
1234 2) AAA::inA isn't the name of a class. In that case, either the
1235 user made a typo or AAA::inA is the name of a namespace.
1236 Either way, we just look up AAA::inA::fun with lookup_symbol.
1238 Thus, our first task is to find everything before the last set of
1239 double-colons and figure out if it's the name of a class. So we
1240 first loop through all of the double-colons. */
1242 p2
= p
; /* Save for restart. */
1244 /* This is very messy. Following the example above we have now the
1247 argptr -> "AAA::inA::fun
1248 saved_arg -> "AAA::inA::fun
1249 saved_arg2 -> "AAA::inA::fun
1250 p2 -> "::inA::fun". */
1252 /* In the loop below, with these strings, we'll make 2 passes, each
1253 is marked in comments.*/
1257 /* Move pointer up to next possible class/namespace token. */
1259 p
= p2
+ 1; /* Restart with old value +1. */
1261 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1262 i.e. if there is a double-colon, p will now point to the
1264 /* PASS2: p2->"::fun", p->":fun" */
1266 /* Move pointer ahead to next double-colon. */
1267 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\'')
1270 if (current_language
->la_language
== language_cplus
)
1271 p
+= cp_validate_operator (p
);
1275 temp_end
= find_template_name_end (p
);
1277 error (_("malformed template specification in command"));
1280 /* Note that, since, at the start of this loop, p would be
1281 pointing to the second colon in a double-colon, we only
1282 satisfy the condition below if there is another
1283 double-colon to the right (after). I.e. there is another
1284 component that can be a class or a namespace. I.e, if at
1285 the beginning of this loop (PASS1), we had
1286 p->":inA::fun", we'll trigger this when p has been
1287 advanced to point to "::fun". */
1288 /* PASS2: we will not trigger this. */
1289 else if ((p
[0] == ':') && (p
[1] == ':'))
1290 break; /* Found double-colon. */
1292 /* PASS2: We'll keep getting here, until p->"", at which point
1293 we exit this loop. */
1298 break; /* Out of the while (1). This would happen
1299 for instance if we have looked up
1300 unsuccessfully all the components of the
1301 string, and p->""(PASS2) */
1303 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1305 /* Save restart for next time around. */
1307 /* Restore argptr as it was on entry to this function. */
1308 *argptr
= saved_arg2
;
1309 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1312 /* All ready for next pass through the loop. */
1316 /* Start of lookup in the symbol tables. */
1318 /* Lookup in the symbol table the substring between argptr and
1319 p. Note, this call changes the value of argptr. */
1320 /* Before the call, argptr->"AAA::inA::fun",
1321 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1323 sym_class
= lookup_prefix_sym (argptr
, p2
);
1325 /* If sym_class has been found, and if "AAA::inA" is a class, then
1326 we're in case 1 above. So we look up "fun" as a method of that
1329 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1330 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1331 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1333 /* Arg token is not digits => try it as a function name.
1334 Find the next token (everything up to end or next
1337 && strchr (get_gdb_completer_quote_characters (),
1340 p
= skip_quoted (*argptr
);
1341 *argptr
= *argptr
+ 1;
1345 /* At this point argptr->"fun". */
1349 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':'
1352 /* At this point p->"". String ended. */
1353 /* Nope, C++ operators could have spaces in them
1354 ("foo::operator <" or "foo::operator delete []").
1355 I apologize, this is a bit hacky... */
1356 if (current_language
->la_language
== language_cplus
1357 && *p
== ' ' && p
- 8 - *argptr
+ 1 > 0)
1359 /* The above loop has already swallowed "operator". */
1360 p
+= cp_validate_operator (p
- 8) - 8;
1363 /* Keep any template parameters */
1365 p
= find_template_name_end (p
);
1367 /* Keep method overload information. */
1368 a
= strchr (p
, '(');
1370 p
= find_method_overload_end (a
);
1372 /* Make sure we keep important kewords like "const" */
1373 if (strncmp (p
, " const", 6) == 0)
1376 /* Java may append typenames, so assume that if there is
1377 anything else left in *argptr, it must be a typename. */
1378 if (*p
&& current_language
->la_language
== language_java
)
1385 copy
= (char *) alloca (p2
- p
+ 1);
1386 memcpy (copy
, p
, p2
- p
);
1387 copy
[p2
- p
] = '\0';
1388 type
= lookup_typename (current_language
, get_current_arch (),
1392 /* Save the location of this just in case this
1393 method/type combination isn't actually defined.
1394 It will be checked later. */
1395 saved_java_argptr
= p
;
1401 /* Allocate our own copy of the substring between argptr and
1403 copy
= (char *) alloca (p
- *argptr
+ 1);
1404 memcpy (copy
, *argptr
, p
- *argptr
);
1405 copy
[p
- *argptr
] = '\0';
1407 && copy
[p
- *argptr
- 1]
1408 && strchr (get_gdb_completer_quote_characters (),
1409 copy
[p
- *argptr
- 1]) != NULL
)
1410 copy
[p
- *argptr
- 1] = '\0';
1412 /* At this point copy->"fun", p->"" */
1414 /* No line number may be specified. */
1415 while (*p
== ' ' || *p
== '\t')
1418 /* At this point arptr->"". */
1420 /* Look for copy as a method of sym_class. */
1421 /* At this point copy->"fun", sym_class is "AAA:inA",
1422 saved_arg->"AAA::inA::fun". This concludes the scanning of
1423 the string for possible components matches. If we find it
1424 here, we return. If not, and we are at the and of the string,
1425 we'll lookup the whole string in the symbol tables. */
1427 values
= find_method (funfirstline
, canonical
, saved_arg
,
1428 copy
, t
, sym_class
, not_found_ptr
);
1429 if (saved_java_argptr
!= NULL
&& values
.nelts
== 1)
1431 /* The user specified a specific return type for a java method.
1432 Double-check that it really is the one the user specified.
1433 [This is a necessary evil because strcmp_iw_ordered stops
1434 comparisons too prematurely.] */
1435 sym
= find_pc_sect_function (values
.sals
[0].pc
,
1436 values
.sals
[0].section
);
1437 /* We just found a SAL, we had better be able to go backwards! */
1438 gdb_assert (sym
!= NULL
);
1439 if (strcmp_iw (SYMBOL_LINKAGE_NAME (sym
), saved_arg
) != 0)
1441 xfree (values
.sals
);
1442 error (_("the class `%s' does not have any method instance named %s\n"),
1443 SYMBOL_PRINT_NAME (sym_class
), copy
);
1447 } /* End if symbol found */
1450 /* We couldn't find a class, so we're in case 2 above. We check the
1451 entire name as a symbol instead. */
1453 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1454 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1455 /* Note: if is_quoted should be true, we snuff out quote here
1457 copy
[p
- saved_arg2
] = '\000';
1458 /* Set argptr to skip over the name. */
1459 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1461 /* Look up entire name */
1462 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1464 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1466 /* Couldn't find any interpretation as classes/namespaces, so give
1467 up. The quotes are important if copy is empty. */
1470 cplusplus_error (saved_arg
,
1471 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1475 /* Next come some helper functions for decode_compound. */
1477 /* Return the symbol corresponding to the substring of *ARGPTR ending
1478 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1479 name in question, the compound object separator ("::" or "."), and
1480 whitespace. Note that *ARGPTR is changed whether or not the
1481 lookup_symbol call finds anything (i.e we return NULL). As an
1482 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1484 static struct symbol
*
1485 lookup_prefix_sym (char **argptr
, char *p
)
1491 /* Extract the class name. */
1493 while (p
!= *argptr
&& p
[-1] == ' ')
1495 copy
= (char *) alloca (p
- *argptr
+ 1);
1496 memcpy (copy
, *argptr
, p
- *argptr
);
1497 copy
[p
- *argptr
] = 0;
1499 /* Discard the class name from the argptr. */
1500 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1501 while (*p
== ' ' || *p
== '\t')
1505 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1506 argptr->"inA::fun" */
1508 sym
= lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0);
1511 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1512 fail when the user attempts to lookup a method of a class
1513 via a typedef'd name (NOT via the class's name, which is already
1514 handled in symbol_matches_domain). So try the lookup again
1515 using VAR_DOMAIN (where typedefs live) and double-check that we
1516 found a struct/class type. */
1517 struct symbol
*s
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1521 struct type
*t
= SYMBOL_TYPE (s
);
1524 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
1532 /* This finds the method COPY in the class whose type is T and whose
1533 symbol is SYM_CLASS. */
1535 static struct symtabs_and_lines
1536 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1537 char *copy
, struct type
*t
, struct symbol
*sym_class
, int *not_found_ptr
)
1539 struct symtabs_and_lines values
;
1540 struct symbol
*sym
= NULL
;
1541 int i1
; /* Counter for the symbol array. */
1542 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1543 * sizeof (struct symbol
*));
1545 /* Find all methods with a matching name, and put them in
1548 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1552 /* There is exactly one field with that name. */
1555 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1557 values
.sals
= (struct symtab_and_line
*)
1558 xmalloc (sizeof (struct symtab_and_line
));
1560 values
.sals
[0] = find_function_start_sal (sym
,
1572 /* If we were given a specific overload instance, use that
1573 (or error if no matches were found). Otherwise ask the user
1574 which one to use. */
1575 if (strchr (saved_arg
, '(') != NULL
)
1579 for (i
= 0; i
< i1
; ++i
)
1581 char *name
= saved_arg
;
1582 char *canon
= cp_canonicalize_string (name
);
1587 if (strcmp_iw (name
, SYMBOL_LINKAGE_NAME (sym_arr
[i
])) == 0)
1589 values
.sals
= (struct symtab_and_line
*)
1590 xmalloc (sizeof (struct symtab_and_line
));
1592 values
.sals
[0] = find_function_start_sal (sym_arr
[i
],
1603 error (_("the class `%s' does not have any method instance named %s\n"),
1604 SYMBOL_PRINT_NAME (sym_class
), copy
);
1607 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1614 cplusplus_error (saved_arg
,
1615 "the class `%s' does not have destructor defined\n",
1616 SYMBOL_PRINT_NAME (sym_class
));
1618 cplusplus_error (saved_arg
,
1619 "the class %s does not have any method named %s\n",
1620 SYMBOL_PRINT_NAME (sym_class
), copy
);
1626 /* Return the symtab associated to the filename given by the substring
1627 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1628 NOT_FOUND_PTR is not null and the source file is not found, store
1629 boolean true at the location pointed to and do not issue an
1632 static struct symtab
*
1633 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1638 struct symtab
*file_symtab
;
1641 while (p
!= *argptr
&& p
[-1] == ' ')
1643 if ((*p
== '"') && is_quote_enclosed
)
1645 copy
= (char *) alloca (p
- *argptr
+ 1);
1646 memcpy (copy
, *argptr
, p
- *argptr
);
1647 /* It may have the ending quote right after the file name. */
1648 if ((is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1649 || copy
[p
- *argptr
- 1] == '\'')
1650 copy
[p
- *argptr
- 1] = 0;
1652 copy
[p
- *argptr
] = 0;
1654 /* Find that file's data. */
1655 file_symtab
= lookup_symtab (copy
);
1656 if (file_symtab
== 0)
1660 if (!have_full_symbols () && !have_partial_symbols ())
1661 throw_error (NOT_FOUND_ERROR
,
1662 _("No symbol table is loaded. Use the \"file\" command."));
1663 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1666 /* Discard the file name from the arg. */
1668 while (*p
== ' ' || *p
== '\t')
1677 /* This decodes a line where the argument is all digits (possibly
1678 preceded by a sign). Q should point to the end of those digits;
1679 the other arguments are as usual. */
1681 static struct symtabs_and_lines
1682 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1683 int default_line
, char ***canonical
,
1684 struct symtab
*file_symtab
, char *q
)
1687 struct symtabs_and_lines values
;
1688 struct symtab_and_line val
;
1696 /* We might need a canonical line spec if no file was specified. */
1697 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1701 val
.pspace
= current_program_space
;
1703 /* This is where we need to make sure that we have good defaults.
1704 We must guarantee that this section of code is never executed
1705 when we are called with just a function name, since
1706 set_default_source_symtab_and_line uses
1707 select_source_symtab that calls us with such an argument. */
1709 if (file_symtab
== 0 && default_symtab
== 0)
1711 /* Make sure we have at least a default source file. */
1712 set_default_source_symtab_and_line ();
1713 initialize_defaults (&default_symtab
, &default_line
);
1716 if (**argptr
== '+')
1717 sign
= plus
, (*argptr
)++;
1718 else if (**argptr
== '-')
1719 sign
= minus
, (*argptr
)++;
1720 val
.line
= atoi (*argptr
);
1726 if (file_symtab
== 0)
1727 val
.line
= default_line
+ val
.line
;
1732 if (file_symtab
== 0)
1733 val
.line
= default_line
- val
.line
;
1738 break; /* No need to adjust val.line. */
1741 while (*q
== ' ' || *q
== '\t')
1744 if (file_symtab
== 0)
1745 file_symtab
= default_symtab
;
1747 /* It is possible that this source file has more than one symtab,
1748 and that the new line number specification has moved us from the
1749 default (in file_symtab) to a new one. */
1750 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1751 if (val
.symtab
== 0)
1752 val
.symtab
= file_symtab
;
1754 val
.pspace
= SYMTAB_PSPACE (val
.symtab
);
1756 values
.sals
= (struct symtab_and_line
*)
1757 xmalloc (sizeof (struct symtab_and_line
));
1758 values
.sals
[0] = val
;
1761 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1762 values
.sals
[0].explicit_line
= 1;
1768 /* Decode a linespec starting with a dollar sign. */
1770 static struct symtabs_and_lines
1771 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1772 char ***canonical
, struct symtab
*file_symtab
)
1776 int need_canonical
= 0;
1777 struct symtabs_and_lines values
;
1778 struct symtab_and_line val
;
1781 struct minimal_symbol
*msymbol
;
1783 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1784 while (*p
>= '0' && *p
<= '9')
1786 if (!*p
) /* Reached end of token without hitting non-digit. */
1788 /* We have a value history reference. */
1789 struct value
*val_history
;
1791 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1792 val_history
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1793 if (TYPE_CODE (value_type (val_history
)) != TYPE_CODE_INT
)
1794 error (_("History values used in line specs must have integer values."));
1795 valx
= value_as_long (val_history
);
1799 /* Not all digits -- may be user variable/function or a
1800 convenience variable. */
1802 /* Look up entire name as a symbol first. */
1803 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1804 file_symtab
= (struct symtab
*) NULL
;
1806 /* Symbol was found --> jump to normal symbol processing. */
1808 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1810 /* If symbol was not found, look in minimal symbol tables. */
1811 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1812 /* Min symbol was found --> jump to minsym processing. */
1814 return minsym_found (funfirstline
, msymbol
);
1816 /* Not a user variable or function -- must be convenience variable. */
1817 if (!get_internalvar_integer (lookup_internalvar (copy
+ 1), &valx
))
1818 error (_("Convenience variables used in line specs must have integer values."));
1823 /* Either history value or convenience value from above, in valx. */
1824 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
1827 val
.pspace
= current_program_space
;
1829 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
1830 values
.sals
[0] = val
;
1834 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1841 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1842 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1843 the function cannot be found, store boolean true in the location pointed to
1844 and do not issue an error message. */
1846 static struct symtabs_and_lines
1847 decode_variable (char *copy
, int funfirstline
, char ***canonical
,
1848 struct symtab
*file_symtab
, int *not_found_ptr
)
1851 struct minimal_symbol
*msymbol
;
1853 sym
= lookup_symbol (copy
,
1855 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1857 : get_selected_block (0)),
1861 return symbol_found (funfirstline
, canonical
, copy
, sym
, file_symtab
);
1863 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1865 if (msymbol
!= NULL
)
1866 return minsym_found (funfirstline
, msymbol
);
1871 if (!have_full_symbols ()
1872 && !have_partial_symbols ()
1873 && !have_minimal_symbols ())
1874 throw_error (NOT_FOUND_ERROR
,
1875 _("No symbol table is loaded. Use the \"file\" command."));
1876 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1882 /* Now come some functions that are called from multiple places within
1885 /* We've found a symbol SYM to associate with our linespec; build a
1886 corresponding struct symtabs_and_lines. */
1888 static struct symtabs_and_lines
1889 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1890 struct symbol
*sym
, struct symtab
*file_symtab
)
1892 struct symtabs_and_lines values
;
1894 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1896 /* Arg is the name of a function */
1897 values
.sals
= (struct symtab_and_line
*)
1898 xmalloc (sizeof (struct symtab_and_line
));
1899 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1902 /* Don't use the SYMBOL_LINE; if used at all it points to
1903 the line containing the parameters or thereabouts, not
1904 the first line of code. */
1906 /* We might need a canonical line spec if it is a static
1908 if (file_symtab
== 0)
1910 struct blockvector
*bv
= BLOCKVECTOR (SYMBOL_SYMTAB (sym
));
1911 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1913 if (lookup_block_symbol (b
, copy
, VAR_DOMAIN
) != NULL
)
1914 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1921 error (_("\"%s\" is not a function"), copy
);
1922 else if (SYMBOL_LINE (sym
) != 0)
1924 /* We know its line number. */
1925 values
.sals
= (struct symtab_and_line
*)
1926 xmalloc (sizeof (struct symtab_and_line
));
1928 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1929 values
.sals
[0].symtab
= SYMBOL_SYMTAB (sym
);
1930 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1934 /* This can happen if it is compiled with a compiler which doesn't
1935 put out line numbers for variables. */
1936 /* FIXME: Shouldn't we just set .line and .symtab to zero
1937 and return? For example, "info line foo" could print
1939 error (_("Line number not known for symbol \"%s\""), copy
);
1943 /* We've found a minimal symbol MSYMBOL to associate with our
1944 linespec; build a corresponding struct symtabs_and_lines. */
1946 static struct symtabs_and_lines
1947 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1949 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1950 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1951 struct symtabs_and_lines values
;
1954 values
.sals
= (struct symtab_and_line
*)
1955 xmalloc (sizeof (struct symtab_and_line
));
1956 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1957 (struct obj_section
*) 0, 0);
1958 values
.sals
[0].section
= SYMBOL_OBJ_SECTION (msymbol
);
1960 /* The minimal symbol might point to a function descriptor;
1961 resolve it to the actual code address instead. */
1962 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
,
1965 if (pc
!= values
.sals
[0].pc
)
1966 values
.sals
[0] = find_pc_sect_line (pc
, NULL
, 0);
1969 skip_prologue_sal (&values
.sals
[0]);