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
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
31 #include "completer.h"
33 #include "parser-defs.h"
35 #include "objc-lang.h"
37 #include "exceptions.h"
40 /* We share this one with symtab.c, but it is not exported widely. */
42 extern char *operator_chars (char *, char **);
44 /* Prototypes for local functions */
46 static void initialize_defaults (struct symtab
**default_symtab
,
49 static void set_flags (char *arg
, int *is_quoted
, char **paren_pointer
);
51 static struct symtabs_and_lines
decode_indirect (char **argptr
);
53 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
55 static struct symtabs_and_lines
decode_objc (char **argptr
,
57 struct symtab
*file_symtab
,
61 static struct symtabs_and_lines
decode_compound (char **argptr
,
67 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
69 static struct symtabs_and_lines
find_method (int funfirstline
,
74 struct symbol
*sym_class
);
76 static int collect_methods (char *copy
, struct type
*t
,
77 struct symbol
*sym_class
,
78 struct symbol
**sym_arr
);
80 static NORETURN
void cplusplus_error (const char *name
,
82 ATTR_NORETURN
ATTR_FORMAT (printf
, 2, 3);
84 static int total_number_of_methods (struct type
*type
);
86 static int find_methods (struct type
*, char *,
87 enum language
, struct symbol
**);
89 static int add_matching_methods (int method_counter
, struct type
*t
,
90 enum language language
,
91 struct symbol
**sym_arr
);
93 static int add_constructors (int method_counter
, struct type
*t
,
94 enum language language
,
95 struct symbol
**sym_arr
);
97 static void build_canonical_line_spec (struct symtab_and_line
*,
100 static char *find_toplevel_char (char *s
, char c
);
102 static int is_objc_method_format (const char *s
);
104 static struct symtabs_and_lines
decode_line_2 (struct symbol
*[],
107 static struct symtab
*symtab_from_filename (char **argptr
,
108 char *p
, int is_quote_enclosed
,
112 symtabs_and_lines
decode_all_digits (char **argptr
,
113 struct symtab
*default_symtab
,
116 struct symtab
*file_symtab
,
119 static struct symtabs_and_lines
decode_dollar (char *copy
,
121 struct symtab
*default_symtab
,
123 struct symtab
*file_symtab
);
125 static struct symtabs_and_lines
decode_variable (char *copy
,
128 struct symtab
*file_symtab
,
132 symtabs_and_lines
symbol_found (int funfirstline
,
136 struct symtab
*file_symtab
,
137 struct symtab
*sym_symtab
);
140 symtabs_and_lines
minsym_found (int funfirstline
,
141 struct minimal_symbol
*msymbol
);
143 /* Helper functions. */
145 /* Issue a helpful hint on using the command completion feature on
146 single quoted demangled C++ symbols as part of the completion
150 cplusplus_error (const char *name
, const char *fmt
, ...)
152 struct ui_file
*tmp_stream
;
153 tmp_stream
= mem_fileopen ();
154 make_cleanup_ui_file_delete (tmp_stream
);
158 va_start (args
, fmt
);
159 vfprintf_unfiltered (tmp_stream
, fmt
, args
);
163 while (*name
== '\'')
165 fprintf_unfiltered (tmp_stream
,
166 ("Hint: try '%s<TAB> or '%s<ESC-?>\n"
167 "(Note leading single quote.)"),
169 error_stream (tmp_stream
);
172 /* Return the number of methods described for TYPE, including the
173 methods from types it derives from. This can't be done in the symbol
174 reader because the type of the baseclass might still be stubbed
175 when the definition of the derived class is parsed. */
178 total_number_of_methods (struct type
*type
)
183 CHECK_TYPEDEF (type
);
184 if (TYPE_CPLUS_SPECIFIC (type
) == NULL
)
186 count
= TYPE_NFN_FIELDS_TOTAL (type
);
188 for (n
= 0; n
< TYPE_N_BASECLASSES (type
); n
++)
189 count
+= total_number_of_methods (TYPE_BASECLASS (type
, n
));
194 /* Recursive helper function for decode_line_1.
195 Look for methods named NAME in type T.
196 Return number of matches.
197 Put matches in SYM_ARR, which should have been allocated with
198 a size of total_number_of_methods (T) * sizeof (struct symbol *).
199 Note that this function is g++ specific. */
202 find_methods (struct type
*t
, char *name
, enum language language
,
203 struct symbol
**sym_arr
)
207 char *class_name
= type_name_no_tag (t
);
209 /* Ignore this class if it doesn't have a name. This is ugly, but
210 unless we figure out how to get the physname without the name of
211 the class, then the loop can't do any good. */
213 && (lookup_symbol_in_language (class_name
, (struct block
*) NULL
,
214 STRUCT_DOMAIN
, language
, (int *) NULL
,
215 (struct symtab
**) NULL
)))
218 int name_len
= strlen (name
);
222 /* Loop over each method name. At this level, all overloads of a name
223 are counted as a single name. There is an inner loop which loops over
226 for (method_counter
= TYPE_NFN_FIELDS (t
) - 1;
230 char *method_name
= TYPE_FN_FIELDLIST_NAME (t
, method_counter
);
233 if (strncmp (method_name
, "__", 2) == 0 ||
234 strncmp (method_name
, "op", 2) == 0 ||
235 strncmp (method_name
, "type", 4) == 0)
237 if (cplus_demangle_opname (method_name
, dem_opname
, DMGL_ANSI
))
238 method_name
= dem_opname
;
239 else if (cplus_demangle_opname (method_name
, dem_opname
, 0))
240 method_name
= dem_opname
;
243 if (strcmp_iw (name
, method_name
) == 0)
244 /* Find all the overloaded methods with that name. */
245 i1
+= add_matching_methods (method_counter
, t
, language
,
247 else if (strncmp (class_name
, name
, name_len
) == 0
248 && (class_name
[name_len
] == '\0'
249 || class_name
[name_len
] == '<'))
250 i1
+= add_constructors (method_counter
, t
, language
,
255 /* Only search baseclasses if there is no match yet, since names in
256 derived classes override those in baseclasses.
258 FIXME: The above is not true; it is only true of member functions
259 if they have the same number of arguments (??? - section 13.1 of the
260 ARM says the function members are not in the same scope but doesn't
261 really spell out the rules in a way I understand. In any case, if
262 the number of arguments differ this is a case in which we can overload
263 rather than hiding without any problem, and gcc 2.4.5 does overload
264 rather than hiding in this case). */
267 for (ibase
= 0; ibase
< TYPE_N_BASECLASSES (t
); ibase
++)
268 i1
+= find_methods (TYPE_BASECLASS (t
, ibase
), name
,
269 language
, sym_arr
+ i1
);
274 /* Add the symbols associated to methods of the class whose type is T
275 and whose name matches the method indexed by METHOD_COUNTER in the
276 array SYM_ARR. Return the number of methods added. */
279 add_matching_methods (int method_counter
, struct type
*t
,
280 enum language language
, struct symbol
**sym_arr
)
285 for (field_counter
= TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
292 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
294 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
298 tmp_name
= gdb_mangle_name (t
,
301 phys_name
= alloca (strlen (tmp_name
) + 1);
302 strcpy (phys_name
, tmp_name
);
306 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
308 /* Destructor is handled by caller, don't add it to
310 if (is_destructor_name (phys_name
) != 0)
313 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
317 (struct symtab
**) NULL
);
322 /* This error message gets printed, but the method
323 still seems to be found
324 fputs_filtered("(Cannot find method ", gdb_stdout);
325 fprintf_symbol_filtered (gdb_stdout, phys_name,
327 DMGL_PARAMS | DMGL_ANSI);
328 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
336 /* Add the symbols associated to constructors of the class whose type
337 is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the
338 array SYM_ARR. Return the number of methods added. */
341 add_constructors (int method_counter
, struct type
*t
,
342 enum language language
, struct symbol
**sym_arr
)
347 /* For GCC 3.x and stabs, constructors and destructors
348 have names like __base_ctor and __complete_dtor.
349 Check the physname for now if we're looking for a
352 = TYPE_FN_FIELDLIST_LENGTH (t
, method_counter
) - 1;
359 f
= TYPE_FN_FIELDLIST1 (t
, method_counter
);
361 /* GCC 3.x will never produce stabs stub methods, so
362 we don't need to handle this case. */
363 if (TYPE_FN_FIELD_STUB (f
, field_counter
))
365 phys_name
= TYPE_FN_FIELD_PHYSNAME (f
, field_counter
);
366 if (! is_constructor_name (phys_name
))
369 /* If this method is actually defined, include it in the
371 sym_arr
[i1
] = lookup_symbol_in_language (phys_name
,
375 (struct symtab
**) NULL
);
383 /* Helper function for decode_line_1.
384 Build a canonical line spec in CANONICAL if it is non-NULL and if
385 the SAL has a symtab.
386 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
387 If SYMNAME is NULL the line number from SAL is used and the canonical
388 line spec is `filename:linenum'. */
391 build_canonical_line_spec (struct symtab_and_line
*sal
, char *symname
,
394 char **canonical_arr
;
395 char *canonical_name
;
397 struct symtab
*s
= sal
->symtab
;
399 if (s
== (struct symtab
*) NULL
400 || s
->filename
== (char *) NULL
401 || canonical
== (char ***) NULL
)
404 canonical_arr
= (char **) xmalloc (sizeof (char *));
405 *canonical
= canonical_arr
;
407 filename
= s
->filename
;
410 canonical_name
= xmalloc (strlen (filename
) + strlen (symname
) + 2);
411 sprintf (canonical_name
, "%s:%s", filename
, symname
);
415 canonical_name
= xmalloc (strlen (filename
) + 30);
416 sprintf (canonical_name
, "%s:%d", filename
, sal
->line
);
418 canonical_arr
[0] = canonical_name
;
423 /* Find an instance of the character C in the string S that is outside
424 of all parenthesis pairs, single-quoted strings, and double-quoted
425 strings. Also, ignore the char within a template name, like a ','
426 within foo<int, int>. */
429 find_toplevel_char (char *s
, char c
)
431 int quoted
= 0; /* zero if we're not in quotes;
432 '"' if we're in a double-quoted string;
433 '\'' if we're in a single-quoted string. */
434 int depth
= 0; /* Number of unclosed parens we've seen. */
437 for (scan
= s
; *scan
; scan
++)
443 else if (*scan
== '\\' && *(scan
+ 1))
446 else if (*scan
== c
&& ! quoted
&& depth
== 0)
448 else if (*scan
== '"' || *scan
== '\'')
450 else if (*scan
== '(' || *scan
== '<')
452 else if ((*scan
== ')' || *scan
== '>') && depth
> 0)
459 /* Determines if the gives string corresponds to an Objective-C method
460 representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols
461 are allowed to have spaces and parentheses in them. */
464 is_objc_method_format (const char *s
)
466 if (s
== NULL
|| *s
== '\0')
468 /* Handle arguments with the format FILENAME:SYMBOL. */
469 if ((s
[0] == ':') && (strchr ("+-", s
[1]) != NULL
)
470 && (s
[2] == '[') && strchr(s
, ']'))
472 /* Handle arguments that are just SYMBOL. */
473 else if ((strchr ("+-", s
[0]) != NULL
) && (s
[1] == '[') && strchr(s
, ']'))
478 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
479 operate on (ask user if necessary).
480 If CANONICAL is non-NULL return a corresponding array of mangled names
481 as canonical line specs there. */
483 static struct symtabs_and_lines
484 decode_line_2 (struct symbol
*sym_arr
[], int nelts
, int funfirstline
,
487 struct symtabs_and_lines values
, return_values
;
492 struct cleanup
*old_chain
;
493 char **canonical_arr
= (char **) NULL
;
495 values
.sals
= (struct symtab_and_line
*)
496 alloca (nelts
* sizeof (struct symtab_and_line
));
497 return_values
.sals
= (struct symtab_and_line
*)
498 xmalloc (nelts
* sizeof (struct symtab_and_line
));
499 old_chain
= make_cleanup (xfree
, return_values
.sals
);
503 canonical_arr
= (char **) xmalloc (nelts
* sizeof (char *));
504 make_cleanup (xfree
, canonical_arr
);
505 memset (canonical_arr
, 0, nelts
* sizeof (char *));
506 *canonical
= canonical_arr
;
510 printf_unfiltered (_("[0] cancel\n[1] all\n"));
513 init_sal (&return_values
.sals
[i
]); /* Initialize to zeroes. */
514 init_sal (&values
.sals
[i
]);
515 if (sym_arr
[i
] && SYMBOL_CLASS (sym_arr
[i
]) == LOC_BLOCK
)
517 values
.sals
[i
] = find_function_start_sal (sym_arr
[i
], funfirstline
);
518 if (values
.sals
[i
].symtab
)
519 printf_unfiltered ("[%d] %s at %s:%d\n",
521 SYMBOL_PRINT_NAME (sym_arr
[i
]),
522 values
.sals
[i
].symtab
->filename
,
523 values
.sals
[i
].line
);
525 printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"),
527 SYMBOL_PRINT_NAME (sym_arr
[i
]),
528 values
.sals
[i
].line
);
532 printf_unfiltered (_("?HERE\n"));
536 prompt
= getenv ("PS2");
541 args
= command_line_input (prompt
, 0, "overload-choice");
543 if (args
== 0 || *args
== 0)
544 error_no_arg (_("one or more choice numbers"));
552 while (*arg1
>= '0' && *arg1
<= '9')
554 if (*arg1
&& *arg1
!= ' ' && *arg1
!= '\t')
555 error (_("Arguments must be choice numbers."));
560 error (_("canceled"));
565 for (i
= 0; i
< nelts
; i
++)
567 if (canonical_arr
[i
] == NULL
)
569 symname
= DEPRECATED_SYMBOL_NAME (sym_arr
[i
]);
570 canonical_arr
[i
] = savestring (symname
, strlen (symname
));
574 memcpy (return_values
.sals
, values
.sals
,
575 (nelts
* sizeof (struct symtab_and_line
)));
576 return_values
.nelts
= nelts
;
577 discard_cleanups (old_chain
);
578 return return_values
;
581 if (num
>= nelts
+ 2)
583 printf_unfiltered (_("No choice number %d.\n"), num
);
588 if (values
.sals
[num
].pc
)
592 symname
= DEPRECATED_SYMBOL_NAME (sym_arr
[num
]);
593 make_cleanup (xfree
, symname
);
594 canonical_arr
[i
] = savestring (symname
, strlen (symname
));
596 return_values
.sals
[i
++] = values
.sals
[num
];
597 values
.sals
[num
].pc
= 0;
601 printf_unfiltered (_("duplicate request for %d ignored.\n"), num
);
606 while (*args
== ' ' || *args
== '\t')
609 return_values
.nelts
= i
;
610 discard_cleanups (old_chain
);
611 return return_values
;
614 /* The parser of linespec itself. */
616 /* Parse a string that specifies a line number.
617 Pass the address of a char * variable; that variable will be
618 advanced over the characters actually parsed.
622 LINENUM -- that line number in current file. PC returned is 0.
623 FILE:LINENUM -- that line in that file. PC returned is 0.
624 FUNCTION -- line number of openbrace of that function.
625 PC returned is the start of the function.
626 VARIABLE -- line number of definition of that variable.
628 FILE:FUNCTION -- likewise, but prefer functions in that file.
629 *EXPR -- line in which address EXPR appears.
631 This may all be followed by an "if EXPR", which we ignore.
633 FUNCTION may be an undebuggable function found in minimal symbol table.
635 If the argument FUNFIRSTLINE is nonzero, we want the first line
636 of real code inside a function when a function is specified, and it is
637 not OK to specify a variable or type to get its line number.
639 DEFAULT_SYMTAB specifies the file to use if none is specified.
640 It defaults to current_source_symtab.
641 DEFAULT_LINE specifies the line number to use for relative
642 line numbers (that start with signs). Defaults to current_source_line.
643 If CANONICAL is non-NULL, store an array of strings containing the canonical
644 line specs there if necessary. Currently overloaded member functions and
645 line numbers or static functions without a filename yield a canonical
646 line spec. The array and the line spec strings are allocated on the heap,
647 it is the callers responsibility to free them.
649 Note that it is possible to return zero for the symtab
650 if no file is validly specified. Callers must check that.
651 Also, the line number returned may be invalid.
653 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
654 on whether or not failure occurs due to an unknown function or file. In the case
655 where failure does occur due to an unknown function or file, do not issue an error
658 /* We allow single quotes in various places. This is a hideous
659 kludge, which exists because the completer can't yet deal with the
660 lack of single quotes. FIXME: write a linespec_completer which we
661 can use as appropriate instead of make_symbol_completion_list. */
663 struct symtabs_and_lines
664 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
665 int default_line
, char ***canonical
, int *not_found_ptr
)
669 /* If a file name is specified, this is its symtab. */
670 struct symtab
*file_symtab
= NULL
;
673 /* This is NULL if there are no parens in *ARGPTR, or a pointer to
674 the closing parenthesis if there are parens. */
676 /* This says whether or not something in *ARGPTR is quoted with
677 completer_quotes (i.e. with single quotes). */
679 /* Is part of *ARGPTR is enclosed in double quotes? */
680 int is_quote_enclosed
;
681 int is_objc_method
= 0;
682 char *saved_arg
= *argptr
;
687 /* Defaults have defaults. */
689 initialize_defaults (&default_symtab
, &default_line
);
691 /* See if arg is *PC. */
694 return decode_indirect (argptr
);
696 /* Set various flags. 'paren_pointer' is important for overload
697 checking, where we allow things like:
698 (gdb) break c::f(int)
701 set_flags (*argptr
, &is_quoted
, &paren_pointer
);
703 /* Check to see if it's a multipart linespec (with colons or
706 /* Locate the end of the first half of the linespec.
707 After the call, for instance, if the argptr string is "foo.c:123"
708 p will point at "123". If there is only one part, like "foo", p
709 will point to "". If this is a C++ name, like "A::B::foo", p will
710 point to "::B::foo". Argptr is not changed by this call. */
712 p
= locate_first_half (argptr
, &is_quote_enclosed
);
714 /* Check if this is an Objective-C method (anything that starts with
715 a '+' or '-' and a '['). */
716 if (is_objc_method_format (p
))
719 paren_pointer
= NULL
; /* Just a category name. Ignore it. */
722 /* Check if the symbol could be an Objective-C selector. */
725 struct symtabs_and_lines values
;
726 values
= decode_objc (argptr
, funfirstline
, NULL
,
727 canonical
, saved_arg
);
728 if (values
.sals
!= NULL
)
732 /* Does it look like there actually were two parts? */
734 if ((p
[0] == ':' || p
[0] == '.') && paren_pointer
== NULL
)
737 *argptr
= *argptr
+ 1;
739 /* Is it a C++ or Java compound data structure?
740 The check on p[1] == ':' is capturing the case of "::",
741 since p[0]==':' was checked above.
742 Note that the call to decode_compound does everything
743 for us, including the lookup on the symbol table, so we
746 if (p
[0] == '.' || p
[1] == ':')
747 return decode_compound (argptr
, funfirstline
, canonical
,
750 /* No, the first part is a filename; set s to be that file's
751 symtab. Also, move argptr past the filename. */
753 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
,
757 /* No one really seems to know why this was added. It certainly
758 breaks the command line, though, whenever the passed
759 name is of the form ClassName::Method. This bit of code
760 singles out the class name, and if funfirstline is set (for
761 example, you are setting a breakpoint at this function),
762 you get an error. This did not occur with earlier
763 verions, so I am ifdef'ing this out. 3/29/99 */
766 /* Check if what we have till now is a symbol name */
768 /* We may be looking at a template instantiation such
769 as "foo<int>". Check here whether we know about it,
770 instead of falling through to the code below which
771 handles ordinary function names, because that code
772 doesn't like seeing '<' and '>' in a name -- the
773 skip_quoted call doesn't go past them. So see if we
774 can figure it out right now. */
776 copy
= (char *) alloca (p
- *argptr
+ 1);
777 memcpy (copy
, *argptr
, p
- *argptr
);
778 copy
[p
- *argptr
] = '\000';
779 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
782 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
783 return symbol_found (funfirstline
, canonical
, copy
, sym
,
786 /* Otherwise fall out from here and go to file/line spec
791 /* S is specified file's symtab, or 0 if no file specified.
792 arg no longer contains the file name. */
794 /* Check whether arg is all digits (and sign). */
797 if (*q
== '-' || *q
== '+')
799 while (*q
>= '0' && *q
<= '9')
802 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
803 /* We found a token consisting of all digits -- at least one digit. */
804 return decode_all_digits (argptr
, default_symtab
, default_line
,
805 canonical
, file_symtab
, q
);
807 /* Arg token is not digits => try it as a variable name
808 Find the next token (everything up to end or next whitespace). */
810 if (**argptr
== '$') /* May be a convenience variable. */
811 /* One or two $ chars possible. */
812 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
815 p
= skip_quoted (*argptr
);
817 error (_("Unmatched single quote."));
819 else if (is_objc_method
)
821 /* allow word separators in method names for Obj-C */
822 p
= skip_quoted_chars (*argptr
, NULL
, "");
824 else if (paren_pointer
!= NULL
)
826 p
= paren_pointer
+ 1;
830 p
= skip_quoted (*argptr
);
833 copy
= (char *) alloca (p
- *argptr
+ 1);
834 memcpy (copy
, *argptr
, p
- *argptr
);
835 copy
[p
- *argptr
] = '\0';
838 && copy
[0] == copy
[p
- *argptr
- 1]
839 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
841 copy
[p
- *argptr
- 1] = '\0';
844 while (*p
== ' ' || *p
== '\t')
848 /* If it starts with $: may be a legitimate variable or routine name
849 (e.g. HP-UX millicode routines such as $$dyncall), or it may
850 be history value, or it may be a convenience variable. */
853 return decode_dollar (copy
, funfirstline
, default_symtab
,
854 canonical
, file_symtab
);
856 /* Look up that token as a variable.
857 If file specified, use that file's per-file block to start with. */
859 return decode_variable (copy
, funfirstline
, canonical
,
860 file_symtab
, not_found_ptr
);
865 /* Now, more helper functions for decode_line_1. Some conventions
866 that these functions follow:
868 Decode_line_1 typically passes along some of its arguments or local
869 variables to the subfunctions. It passes the variables by
870 reference if they are modified by the subfunction, and by value
873 Some of the functions have side effects that don't arise from
874 variables that are passed by reference. In particular, if a
875 function is passed ARGPTR as an argument, it modifies what ARGPTR
876 points to; typically, it advances *ARGPTR past whatever substring
877 it has just looked at. (If it doesn't modify *ARGPTR, then the
878 function gets passed *ARGPTR instead, which is then called ARG: see
879 set_flags, for example.) Also, functions that return a struct
880 symtabs_and_lines may modify CANONICAL, as in the description of
883 If a function returns a struct symtabs_and_lines, then that struct
884 will immediately make its way up the call chain to be returned by
885 decode_line_1. In particular, all of the functions decode_XXX
886 calculate the appropriate struct symtabs_and_lines, under the
887 assumption that their argument is of the form XXX. */
889 /* First, some functions to initialize stuff at the beggining of the
893 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
895 if (*default_symtab
== 0)
897 /* Use whatever we have for the default source line. We don't use
898 get_current_or_default_symtab_and_line as it can recurse and call
900 struct symtab_and_line cursal
=
901 get_current_source_symtab_and_line ();
903 *default_symtab
= cursal
.symtab
;
904 *default_line
= cursal
.line
;
909 set_flags (char *arg
, int *is_quoted
, char **paren_pointer
)
914 /* 'has_if' is for the syntax:
915 (gdb) break foo if (a==b)
917 if ((ii
= strstr (arg
, " if ")) != NULL
||
918 (ii
= strstr (arg
, "\tif ")) != NULL
||
919 (ii
= strstr (arg
, " if\t")) != NULL
||
920 (ii
= strstr (arg
, "\tif\t")) != NULL
||
921 (ii
= strstr (arg
, " if(")) != NULL
||
922 (ii
= strstr (arg
, "\tif( ")) != NULL
)
924 /* Temporarily zap out "if (condition)" to not confuse the
925 parenthesis-checking code below. This is undone below. Do not
933 && strchr (get_gdb_completer_quote_characters (),
936 *paren_pointer
= strchr (arg
, '(');
937 if (*paren_pointer
!= NULL
)
938 *paren_pointer
= strrchr (*paren_pointer
, ')');
940 /* Now that we're safely past the paren_pointer check, put back " if
941 (condition)" so outer layers can see it. */
948 /* Decode arg of the form *PC. */
950 static struct symtabs_and_lines
951 decode_indirect (char **argptr
)
953 struct symtabs_and_lines values
;
957 pc
= parse_and_eval_address_1 (argptr
);
959 values
.sals
= (struct symtab_and_line
*)
960 xmalloc (sizeof (struct symtab_and_line
));
963 values
.sals
[0] = find_pc_line (pc
, 0);
964 values
.sals
[0].pc
= pc
;
965 values
.sals
[0].section
= find_pc_overlay (pc
);
972 /* Locate the first half of the linespec, ending in a colon, period,
973 or whitespace. (More or less.) Also, check to see if *ARGPTR is
974 enclosed in double quotes; if so, set is_quote_enclosed, advance
975 ARGPTR past that and zero out the trailing double quote.
976 If ARGPTR is just a simple name like "main", p will point to ""
980 locate_first_half (char **argptr
, int *is_quote_enclosed
)
986 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
987 and we must isolate the first half. Outer layers will call again later
990 Don't count commas that appear in argument lists of overloaded
991 functions, or in quoted strings. It's stupid to go to this much
992 trouble when the rest of the function is such an obvious roach hotel. */
993 ii
= find_toplevel_char (*argptr
, ',');
994 has_comma
= (ii
!= 0);
996 /* Temporarily zap out second half to not confuse the code below.
997 This is undone below. Do not change ii!! */
1003 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1004 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1010 *is_quote_enclosed
= 1;
1015 *is_quote_enclosed
= 0;
1020 char *temp_end
= find_template_name_end (p
);
1022 error (_("malformed template specification in command"));
1025 /* Check for a colon and a plus or minus and a [ (which
1026 indicates an Objective-C method) */
1027 if (is_objc_method_format (p
))
1031 /* Check for the end of the first half of the linespec. End of
1032 line, a tab, a double colon or the last single colon, or a
1033 space. But if enclosed in double quotes we do not break on
1038 && ((p
[1] == ':') || (strchr (p
+ 1, ':') == NULL
)))
1039 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1041 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1043 /* Java qualified method. Find the *last* '.', since the
1044 others are package qualifiers. */
1045 for (p1
= p
; *p1
; p1
++)
1053 while (p
[0] == ' ' || p
[0] == '\t')
1056 /* If the closing double quote was left at the end, remove it. */
1057 if (*is_quote_enclosed
)
1059 char *closing_quote
= strchr (p
- 1, '"');
1060 if (closing_quote
&& closing_quote
[1] == '\0')
1061 *closing_quote
= '\0';
1064 /* Now that we've safely parsed the first half, put back ',' so
1065 outer layers can see it. */
1074 /* Here's where we recognise an Objective-C Selector. An Objective C
1075 selector may be implemented by more than one class, therefore it
1076 may represent more than one method/function. This gives us a
1077 situation somewhat analogous to C++ overloading. If there's more
1078 than one method that could represent the selector, then use some of
1079 the existing C++ code to let the user choose one. */
1081 struct symtabs_and_lines
1082 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1083 char ***canonical
, char *saved_arg
)
1085 struct symtabs_and_lines values
;
1086 struct symbol
**sym_arr
= NULL
;
1087 struct symbol
*sym
= NULL
;
1089 struct block
*block
= NULL
;
1096 if (file_symtab
!= NULL
)
1097 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
), STATIC_BLOCK
);
1099 block
= get_selected_block (0);
1101 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1105 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1108 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1112 /* i1 now represents the TOTAL number of matches found.
1113 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1114 which will come first in the sym_arr array. Any low-level
1115 (minimal_symbol) matches will follow those. */
1121 /* Already a struct symbol. */
1126 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1127 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1129 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1134 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1137 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1139 /* Canonicalize this, so it remains resolved for dylib loads. */
1140 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1141 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1145 /* The only match was a non-debuggable symbol. */
1146 values
.sals
[0].symtab
= NULL
;
1147 values
.sals
[0].line
= 0;
1148 values
.sals
[0].end
= 0;
1149 values
.sals
[0].pc
= SYMBOL_VALUE_ADDRESS (sym_arr
[0]);
1156 /* More than one match. The user must choose one or more. */
1157 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1163 /* This handles C++ and Java compound data structures. P should point
1164 at the first component separator, i.e. double-colon or period. As
1165 an example, on entrance to this function we could have ARGPTR
1166 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1168 static struct symtabs_and_lines
1169 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1170 char *saved_arg
, char *p
)
1172 struct symtabs_and_lines values
;
1174 char *saved_arg2
= *argptr
;
1177 /* The symtab that SYM was found in. */
1178 struct symtab
*sym_symtab
;
1180 struct symbol
*sym_class
;
1181 struct symbol
**sym_arr
;
1184 /* First check for "global" namespace specification, of the form
1185 "::foo". If found, skip over the colons and jump to normal
1186 symbol processing. I.e. the whole line specification starts with
1187 "::" (note the condition that *argptr == p). */
1189 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1192 /* Given our example "AAA::inA::fun", we have two cases to consider:
1194 1) AAA::inA is the name of a class. In that case, presumably it
1195 has a method called "fun"; we then look up that method using
1198 2) AAA::inA isn't the name of a class. In that case, either the
1199 user made a typo or AAA::inA is the name of a namespace.
1200 Either way, we just look up AAA::inA::fun with lookup_symbol.
1202 Thus, our first task is to find everything before the last set of
1203 double-colons and figure out if it's the name of a class. So we
1204 first loop through all of the double-colons. */
1206 p2
= p
; /* Save for restart. */
1208 /* This is very messy. Following the example above we have now the
1211 argptr -> "AAA::inA::fun
1212 saved_arg -> "AAA::inA::fun
1213 saved_arg2 -> "AAA::inA::fun
1214 p2 -> "::inA::fun". */
1216 /* In the loop below, with these strings, we'll make 2 passes, each
1217 is marked in comments.*/
1221 /* Move pointer up to next possible class/namespace token. */
1223 p
= p2
+ 1; /* Restart with old value +1. */
1225 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1226 i.e. if there is a double-colon, p will now point to the
1228 /* PASS2: p2->"::fun", p->":fun" */
1230 /* Move pointer ahead to next double-colon. */
1231 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\''))
1235 temp_end
= find_template_name_end (p
);
1237 error (_("malformed template specification in command"));
1240 /* Note that, since, at the start of this loop, p would be
1241 pointing to the second colon in a double-colon, we only
1242 satisfy the condition below if there is another
1243 double-colon to the right (after). I.e. there is another
1244 component that can be a class or a namespace. I.e, if at
1245 the beginning of this loop (PASS1), we had
1246 p->":inA::fun", we'll trigger this when p has been
1247 advanced to point to "::fun". */
1248 /* PASS2: we will not trigger this. */
1249 else if ((p
[0] == ':') && (p
[1] == ':'))
1250 break; /* Found double-colon. */
1252 /* PASS2: We'll keep getting here, until p->"", at which point
1253 we exit this loop. */
1258 break; /* Out of the while (1). This would happen
1259 for instance if we have looked up
1260 unsuccessfully all the components of the
1261 string, and p->""(PASS2) */
1263 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1265 /* Save restart for next time around. */
1267 /* Restore argptr as it was on entry to this function. */
1268 *argptr
= saved_arg2
;
1269 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1272 /* All ready for next pass through the loop. */
1276 /* Start of lookup in the symbol tables. */
1278 /* Lookup in the symbol table the substring between argptr and
1279 p. Note, this call changes the value of argptr. */
1280 /* Before the call, argptr->"AAA::inA::fun",
1281 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1283 sym_class
= lookup_prefix_sym (argptr
, p2
);
1285 /* If sym_class has been found, and if "AAA::inA" is a class, then
1286 we're in case 1 above. So we look up "fun" as a method of that
1289 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1290 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1291 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1293 /* Arg token is not digits => try it as a function name.
1294 Find the next token (everything up to end or next
1297 && strchr (get_gdb_completer_quote_characters (),
1300 p
= skip_quoted (*argptr
);
1301 *argptr
= *argptr
+ 1;
1305 /* At this point argptr->"fun". */
1307 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':')
1309 /* At this point p->"". String ended. */
1312 /* Allocate our own copy of the substring between argptr and
1314 copy
= (char *) alloca (p
- *argptr
+ 1);
1315 memcpy (copy
, *argptr
, p
- *argptr
);
1316 copy
[p
- *argptr
] = '\0';
1318 && copy
[p
- *argptr
- 1]
1319 && strchr (get_gdb_completer_quote_characters (),
1320 copy
[p
- *argptr
- 1]) != NULL
)
1321 copy
[p
- *argptr
- 1] = '\0';
1323 /* At this point copy->"fun", p->"" */
1325 /* No line number may be specified. */
1326 while (*p
== ' ' || *p
== '\t')
1329 /* At this point arptr->"". */
1331 /* Look for copy as a method of sym_class. */
1332 /* At this point copy->"fun", sym_class is "AAA:inA",
1333 saved_arg->"AAA::inA::fun". This concludes the scanning of
1334 the string for possible components matches. If we find it
1335 here, we return. If not, and we are at the and of the string,
1336 we'll lookup the whole string in the symbol tables. */
1338 return find_method (funfirstline
, canonical
, saved_arg
,
1339 copy
, t
, sym_class
);
1341 } /* End if symbol found */
1344 /* We couldn't find a class, so we're in case 2 above. We check the
1345 entire name as a symbol instead. */
1347 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1348 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1349 /* Note: if is_quoted should be true, we snuff out quote here
1351 copy
[p
- saved_arg2
] = '\000';
1352 /* Set argptr to skip over the name. */
1353 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1355 /* Look up entire name */
1356 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
1358 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1361 /* Couldn't find any interpretation as classes/namespaces, so give
1362 up. The quotes are important if copy is empty. */
1363 cplusplus_error (saved_arg
,
1364 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1368 /* Next come some helper functions for decode_compound. */
1370 /* Return the symbol corresponding to the substring of *ARGPTR ending
1371 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1372 name in question, the compound object separator ("::" or "."), and
1373 whitespace. Note that *ARGPTR is changed whether or not the
1374 lookup_symbol call finds anything (i.e we return NULL). As an
1375 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1377 static struct symbol
*
1378 lookup_prefix_sym (char **argptr
, char *p
)
1383 /* Extract the class name. */
1385 while (p
!= *argptr
&& p
[-1] == ' ')
1387 copy
= (char *) alloca (p
- *argptr
+ 1);
1388 memcpy (copy
, *argptr
, p
- *argptr
);
1389 copy
[p
- *argptr
] = 0;
1391 /* Discard the class name from the argptr. */
1392 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1393 while (*p
== ' ' || *p
== '\t')
1397 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1398 argptr->"inA::fun" */
1400 return lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0,
1401 (struct symtab
**) NULL
);
1404 /* This finds the method COPY in the class whose type is T and whose
1405 symbol is SYM_CLASS. */
1407 static struct symtabs_and_lines
1408 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1409 char *copy
, struct type
*t
, struct symbol
*sym_class
)
1411 struct symtabs_and_lines values
;
1412 struct symbol
*sym
= NULL
;
1413 int i1
; /* Counter for the symbol array. */
1414 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1415 * sizeof (struct symbol
*));
1417 /* Find all methods with a matching name, and put them in
1420 i1
= collect_methods (copy
, t
, sym_class
, sym_arr
);
1424 /* There is exactly one field with that name. */
1427 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1429 values
.sals
= (struct symtab_and_line
*)
1430 xmalloc (sizeof (struct symtab_and_line
));
1432 values
.sals
[0] = find_function_start_sal (sym
,
1444 /* There is more than one field with that name
1445 (overloaded). Ask the user which one to use. */
1446 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1452 if (is_operator_name (copy
))
1454 tmp
= (char *) alloca (strlen (copy
+ 3) + 9);
1455 strcpy (tmp
, "operator ");
1456 strcat (tmp
, copy
+ 3);
1461 cplusplus_error (saved_arg
,
1462 "the class `%s' does not have destructor defined\n",
1463 SYMBOL_PRINT_NAME (sym_class
));
1465 cplusplus_error (saved_arg
,
1466 "the class %s does not have any method named %s\n",
1467 SYMBOL_PRINT_NAME (sym_class
), tmp
);
1471 /* Find all methods named COPY in the class whose type is T, and put
1472 them in SYM_ARR. Return the number of methods found. */
1475 collect_methods (char *copy
, struct type
*t
,
1476 struct symbol
*sym_class
, struct symbol
**sym_arr
)
1478 int i1
= 0; /* Counter for the symbol array. */
1480 if (destructor_name_p (copy
, t
))
1482 /* Destructors are a special case. */
1483 int m_index
, f_index
;
1485 if (get_destructor_fn_field (t
, &m_index
, &f_index
))
1487 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (t
, m_index
);
1490 lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f
, f_index
),
1491 NULL
, VAR_DOMAIN
, (int *) NULL
,
1492 (struct symtab
**) NULL
);
1498 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1505 /* Return the symtab associated to the filename given by the substring
1506 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1507 NOT_FOUND_PTR is not null and the source file is not found, store
1508 boolean true at the location pointed to and do not issue an
1511 static struct symtab
*
1512 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1517 struct symtab
*file_symtab
;
1520 while (p
!= *argptr
&& p
[-1] == ' ')
1522 if ((*p
== '"') && is_quote_enclosed
)
1524 copy
= (char *) alloca (p
- *argptr
+ 1);
1525 memcpy (copy
, *argptr
, p
- *argptr
);
1526 /* It may have the ending quote right after the file name. */
1527 if (is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1528 copy
[p
- *argptr
- 1] = 0;
1530 copy
[p
- *argptr
] = 0;
1532 /* Find that file's data. */
1533 file_symtab
= lookup_symtab (copy
);
1534 if (file_symtab
== 0)
1536 if (!have_full_symbols () && !have_partial_symbols ())
1537 error (_("No symbol table is loaded. Use the \"file\" command."));
1540 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1543 /* Discard the file name from the arg. */
1545 while (*p
== ' ' || *p
== '\t')
1554 /* This decodes a line where the argument is all digits (possibly
1555 preceded by a sign). Q should point to the end of those digits;
1556 the other arguments are as usual. */
1558 static struct symtabs_and_lines
1559 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1560 int default_line
, char ***canonical
,
1561 struct symtab
*file_symtab
, char *q
)
1564 struct symtabs_and_lines values
;
1565 struct symtab_and_line val
;
1573 /* We might need a canonical line spec if no file was specified. */
1574 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1578 /* This is where we need to make sure that we have good defaults.
1579 We must guarantee that this section of code is never executed
1580 when we are called with just a function name, since
1581 set_default_source_symtab_and_line uses
1582 select_source_symtab that calls us with such an argument. */
1584 if (file_symtab
== 0 && default_symtab
== 0)
1586 /* Make sure we have at least a default source file. */
1587 set_default_source_symtab_and_line ();
1588 initialize_defaults (&default_symtab
, &default_line
);
1591 if (**argptr
== '+')
1592 sign
= plus
, (*argptr
)++;
1593 else if (**argptr
== '-')
1594 sign
= minus
, (*argptr
)++;
1595 val
.line
= atoi (*argptr
);
1601 if (file_symtab
== 0)
1602 val
.line
= default_line
+ val
.line
;
1607 if (file_symtab
== 0)
1608 val
.line
= default_line
- val
.line
;
1613 break; /* No need to adjust val.line. */
1616 while (*q
== ' ' || *q
== '\t')
1619 if (file_symtab
== 0)
1620 file_symtab
= default_symtab
;
1622 /* It is possible that this source file has more than one symtab,
1623 and that the new line number specification has moved us from the
1624 default (in file_symtab) to a new one. */
1625 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1626 if (val
.symtab
== 0)
1627 val
.symtab
= file_symtab
;
1630 values
.sals
= (struct symtab_and_line
*)
1631 xmalloc (sizeof (struct symtab_and_line
));
1632 values
.sals
[0] = val
;
1635 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1641 /* Decode a linespec starting with a dollar sign. */
1643 static struct symtabs_and_lines
1644 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1645 char ***canonical
, struct symtab
*file_symtab
)
1649 int need_canonical
= 0;
1650 struct symtabs_and_lines values
;
1651 struct symtab_and_line val
;
1654 /* The symtab that SYM was found in. */
1655 struct symtab
*sym_symtab
;
1656 struct minimal_symbol
*msymbol
;
1658 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1659 while (*p
>= '0' && *p
<= '9')
1661 if (!*p
) /* Reached end of token without hitting non-digit. */
1663 /* We have a value history reference. */
1664 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1665 valx
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1666 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1667 error (_("History values used in line specs must have integer values."));
1671 /* Not all digits -- may be user variable/function or a
1672 convenience variable. */
1674 /* Look up entire name as a symbol first. */
1675 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0, &sym_symtab
);
1676 file_symtab
= (struct symtab
*) NULL
;
1678 /* Symbol was found --> jump to normal symbol processing. */
1680 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1683 /* If symbol was not found, look in minimal symbol tables. */
1684 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1685 /* Min symbol was found --> jump to minsym processing. */
1687 return minsym_found (funfirstline
, msymbol
);
1689 /* Not a user variable or function -- must be convenience variable. */
1690 valx
= value_of_internalvar (lookup_internalvar (copy
+ 1));
1691 if (TYPE_CODE (value_type (valx
)) != TYPE_CODE_INT
)
1692 error (_("Convenience variables used in line specs must have integer values."));
1697 /* Either history value or convenience value from above, in valx. */
1698 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
1699 val
.line
= value_as_long (valx
);
1702 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
1703 values
.sals
[0] = val
;
1707 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1714 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1715 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1716 the function cannot be found, store boolean true in the location pointed to
1717 and do not issue an error message. */
1719 static struct symtabs_and_lines
1720 decode_variable (char *copy
, int funfirstline
, char ***canonical
,
1721 struct symtab
*file_symtab
, int *not_found_ptr
)
1724 /* The symtab that SYM was found in. */
1725 struct symtab
*sym_symtab
;
1727 struct minimal_symbol
*msymbol
;
1729 sym
= lookup_symbol (copy
,
1731 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1733 : get_selected_block (0)),
1734 VAR_DOMAIN
, 0, &sym_symtab
);
1737 return symbol_found (funfirstline
, canonical
, copy
, sym
,
1738 file_symtab
, sym_symtab
);
1740 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1742 if (msymbol
!= NULL
)
1743 return minsym_found (funfirstline
, msymbol
);
1745 if (!have_full_symbols () &&
1746 !have_partial_symbols () && !have_minimal_symbols ())
1747 error (_("No symbol table is loaded. Use the \"file\" command."));
1751 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1757 /* Now come some functions that are called from multiple places within
1760 /* We've found a symbol SYM to associate with our linespec; build a
1761 corresponding struct symtabs_and_lines. */
1763 static struct symtabs_and_lines
1764 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1765 struct symbol
*sym
, struct symtab
*file_symtab
,
1766 struct symtab
*sym_symtab
)
1768 struct symtabs_and_lines values
;
1770 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1772 /* Arg is the name of a function */
1773 values
.sals
= (struct symtab_and_line
*)
1774 xmalloc (sizeof (struct symtab_and_line
));
1775 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1778 /* Don't use the SYMBOL_LINE; if used at all it points to
1779 the line containing the parameters or thereabouts, not
1780 the first line of code. */
1782 /* We might need a canonical line spec if it is a static
1784 if (file_symtab
== 0)
1786 struct blockvector
*bv
= BLOCKVECTOR (sym_symtab
);
1787 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1788 if (lookup_block_symbol (b
, copy
, NULL
, VAR_DOMAIN
) != NULL
)
1789 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1796 error (_("\"%s\" is not a function"), copy
);
1797 else if (SYMBOL_LINE (sym
) != 0)
1799 /* We know its line number. */
1800 values
.sals
= (struct symtab_and_line
*)
1801 xmalloc (sizeof (struct symtab_and_line
));
1803 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1804 values
.sals
[0].symtab
= sym_symtab
;
1805 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1809 /* This can happen if it is compiled with a compiler which doesn't
1810 put out line numbers for variables. */
1811 /* FIXME: Shouldn't we just set .line and .symtab to zero
1812 and return? For example, "info line foo" could print
1814 error (_("Line number not known for symbol \"%s\""), copy
);
1818 /* We've found a minimal symbol MSYMBOL to associate with our
1819 linespec; build a corresponding struct symtabs_and_lines. */
1821 static struct symtabs_and_lines
1822 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1824 struct symtabs_and_lines values
;
1826 values
.sals
= (struct symtab_and_line
*)
1827 xmalloc (sizeof (struct symtab_and_line
));
1828 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1829 (struct bfd_section
*) 0, 0);
1830 values
.sals
[0].section
= SYMBOL_BFD_SECTION (msymbol
);
1833 struct symtab_and_line sal
;
1836 += gdbarch_deprecated_function_start_offset (current_gdbarch
);
1837 values
.sals
[0].pc
= gdbarch_skip_prologue
1838 (current_gdbarch
, values
.sals
[0].pc
);
1840 sal
= find_pc_sect_line (values
.sals
[0].pc
, values
.sals
[0].section
, 0);
1842 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
1843 line is still part of the same function. If there is no
1844 line information here, sal.pc will be the passed in PC. */
1845 if (sal
.pc
!= values
.sals
[0].pc
1846 && (lookup_minimal_symbol_by_pc_section (values
.sals
[0].pc
,
1847 values
.sals
[0].section
)
1848 == lookup_minimal_symbol_by_pc_section (sal
.end
,
1849 values
.sals
[0].section
)))
1850 /* Recalculate the line number (might not be N+1). */
1851 values
.sals
[0] = find_pc_sect_line (sal
.end
, values
.sals
[0].section
, 0);
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