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"
44 /* We share this one with symtab.c, but it is not exported widely. */
46 extern char *operator_chars (char *, char **);
48 /* Prototypes for local functions */
50 static void initialize_defaults (struct symtab
**default_symtab
,
53 static void set_flags (char *arg
, int *is_quoted
, char **paren_pointer
);
55 static struct symtabs_and_lines
decode_indirect (char **argptr
);
57 static char *locate_first_half (char **argptr
, int *is_quote_enclosed
);
59 static struct symtabs_and_lines
decode_objc (char **argptr
,
61 struct symtab
*file_symtab
,
65 static struct symtabs_and_lines
decode_compound (char **argptr
,
72 static struct symbol
*lookup_prefix_sym (char **argptr
, char *p
);
74 static struct symtabs_and_lines
find_method (int funfirstline
,
79 struct symbol
*sym_class
,
82 static NORETURN
void cplusplus_error (const char *name
,
84 ATTR_NORETURN
ATTR_FORMAT (printf
, 2, 3);
86 static int total_number_of_methods (struct type
*type
);
88 static int find_methods (struct type
*, char *,
89 enum language
, struct symbol
**);
91 static int add_matching_methods (int method_counter
, struct type
*t
,
92 enum language language
,
93 struct symbol
**sym_arr
);
95 static int add_constructors (int method_counter
, struct type
*t
,
96 enum language language
,
97 struct symbol
**sym_arr
);
99 static void build_canonical_line_spec (struct symtab_and_line
*,
102 static char *find_toplevel_char (char *s
, char c
);
104 static int is_objc_method_format (const char *s
);
106 static struct symtabs_and_lines
decode_line_2 (struct symbol
*[],
109 static struct symtab
*symtab_from_filename (char **argptr
,
110 char *p
, int is_quote_enclosed
,
114 symtabs_and_lines
decode_all_digits (char **argptr
,
115 struct symtab
*default_symtab
,
118 struct symtab
*file_symtab
,
121 static struct symtabs_and_lines
decode_dollar (char *copy
,
123 struct symtab
*default_symtab
,
125 struct symtab
*file_symtab
);
127 static struct symtabs_and_lines
decode_variable (char *copy
,
130 struct symtab
*file_symtab
,
134 symtabs_and_lines
symbol_found (int funfirstline
,
138 struct symtab
*file_symtab
);
141 symtabs_and_lines
minsym_found (int funfirstline
,
142 struct minimal_symbol
*msymbol
);
144 /* Helper functions. */
146 /* Issue a helpful hint on using the command completion feature on
147 single quoted demangled C++ symbols as part of the completion
151 cplusplus_error (const char *name
, const char *fmt
, ...)
153 struct ui_file
*tmp_stream
;
155 tmp_stream
= mem_fileopen ();
156 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 /* The parser of linespec itself. */
634 /* Parse a string that specifies a line number.
635 Pass the address of a char * variable; that variable will be
636 advanced over the characters actually parsed.
640 LINENUM -- that line number in current file. PC returned is 0.
641 FILE:LINENUM -- that line in that file. PC returned is 0.
642 FUNCTION -- line number of openbrace of that function.
643 PC returned is the start of the function.
644 VARIABLE -- line number of definition of that variable.
646 FILE:FUNCTION -- likewise, but prefer functions in that file.
647 *EXPR -- line in which address EXPR appears.
649 This may all be followed by an "if EXPR", which we ignore.
651 FUNCTION may be an undebuggable function found in minimal symbol table.
653 If the argument FUNFIRSTLINE is nonzero, we want the first line
654 of real code inside a function when a function is specified, and it is
655 not OK to specify a variable or type to get its line number.
657 DEFAULT_SYMTAB specifies the file to use if none is specified.
658 It defaults to current_source_symtab.
659 DEFAULT_LINE specifies the line number to use for relative
660 line numbers (that start with signs). Defaults to current_source_line.
661 If CANONICAL is non-NULL, store an array of strings containing the canonical
662 line specs there if necessary. Currently overloaded member functions and
663 line numbers or static functions without a filename yield a canonical
664 line spec. The array and the line spec strings are allocated on the heap,
665 it is the callers responsibility to free them.
667 Note that it is possible to return zero for the symtab
668 if no file is validly specified. Callers must check that.
669 Also, the line number returned may be invalid.
671 If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based
672 on whether or not failure occurs due to an unknown function or file. In the case
673 where failure does occur due to an unknown function or file, do not issue an error
676 /* We allow single quotes in various places. This is a hideous
677 kludge, which exists because the completer can't yet deal with the
678 lack of single quotes. FIXME: write a linespec_completer which we
679 can use as appropriate instead of make_symbol_completion_list. */
681 struct symtabs_and_lines
682 decode_line_1 (char **argptr
, int funfirstline
, struct symtab
*default_symtab
,
683 int default_line
, char ***canonical
, int *not_found_ptr
)
687 /* If a file name is specified, this is its symtab. */
688 struct symtab
*file_symtab
= NULL
;
691 /* This is NULL if there are no parens in *ARGPTR, or a pointer to
692 the closing parenthesis if there are parens. */
694 /* This says whether or not something in *ARGPTR is quoted with
695 completer_quotes (i.e. with single quotes). */
697 /* Is *ARGPTR is enclosed in double quotes? */
698 int is_quote_enclosed
;
699 int is_objc_method
= 0;
700 char *saved_arg
= *argptr
;
701 /* If IS_QUOTED, the end of the quoted bit. */
702 char *end_quote
= NULL
;
703 /* The "first half" of the linespec. */
709 /* Defaults have defaults. */
711 initialize_defaults (&default_symtab
, &default_line
);
713 /* See if arg is *PC. */
716 return decode_indirect (argptr
);
718 /* Set various flags. 'paren_pointer' is important for overload
719 checking, where we allow things like:
720 (gdb) break c::f(int)
723 set_flags (*argptr
, &is_quoted
, &paren_pointer
);
725 end_quote
= skip_quoted (*argptr
);
727 /* Check to see if it's a multipart linespec (with colons or
730 /* Locate the end of the first half of the linespec.
731 After the call, for instance, if the argptr string is "foo.c:123"
732 p will point at "123". If there is only one part, like "foo", p
733 will point to "". If this is a C++ name, like "A::B::foo", p will
734 point to "::B::foo". Argptr is not changed by this call. */
736 first_half
= p
= locate_first_half (argptr
, &is_quote_enclosed
);
738 /* Check if this is an Objective-C method (anything that starts with
739 a '+' or '-' and a '['). */
740 if (is_objc_method_format (p
))
743 paren_pointer
= NULL
; /* Just a category name. Ignore it. */
746 /* Check if the symbol could be an Objective-C selector. */
749 struct symtabs_and_lines values
;
750 values
= decode_objc (argptr
, funfirstline
, NULL
,
751 canonical
, saved_arg
);
752 if (values
.sals
!= NULL
)
756 /* Does it look like there actually were two parts? */
758 if (p
[0] == ':' || p
[0] == '.')
760 /* Is it a C++ or Java compound data structure?
761 The check on p[1] == ':' is capturing the case of "::",
762 since p[0]==':' was checked above.
763 Note that the call to decode_compound does everything
764 for us, including the lookup on the symbol table, so we
767 if (p
[0] == '.' || p
[1] == ':')
769 if (paren_pointer
== NULL
)
770 return decode_compound (argptr
, funfirstline
, canonical
,
771 saved_arg
, p
, not_found_ptr
);
772 /* Otherwise, fall through to decode_variable below. */
776 /* No, the first part is a filename; set file_symtab to be that file's
777 symtab. Also, move argptr past the filename. */
779 file_symtab
= symtab_from_filename (argptr
, p
, is_quote_enclosed
,
782 /* Check for single quotes on the non-filename part. */
785 is_quoted
= (**argptr
786 && strchr (get_gdb_completer_quote_characters (),
789 end_quote
= skip_quoted (*argptr
);
794 /* No one really seems to know why this was added. It certainly
795 breaks the command line, though, whenever the passed
796 name is of the form ClassName::Method. This bit of code
797 singles out the class name, and if funfirstline is set (for
798 example, you are setting a breakpoint at this function),
799 you get an error. This did not occur with earlier
800 verions, so I am ifdef'ing this out. 3/29/99 */
803 /* Check if what we have till now is a symbol name */
805 /* We may be looking at a template instantiation such
806 as "foo<int>". Check here whether we know about it,
807 instead of falling through to the code below which
808 handles ordinary function names, because that code
809 doesn't like seeing '<' and '>' in a name -- the
810 skip_quoted call doesn't go past them. So see if we
811 can figure it out right now. */
813 copy
= (char *) alloca (p
- *argptr
+ 1);
814 memcpy (copy
, *argptr
, p
- *argptr
);
815 copy
[p
- *argptr
] = '\000';
816 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
819 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
820 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
822 /* Otherwise fall out from here and go to file/line spec
827 /* file_symtab is specified file's symtab, or 0 if no file specified.
828 arg no longer contains the file name. */
830 /* If the filename was quoted, we must re-check the quotation. */
832 if (end_quote
== first_half
&& *end_quote
!= '\0')
834 is_quoted
= (**argptr
835 && strchr (get_gdb_completer_quote_characters (),
838 end_quote
= skip_quoted (*argptr
);
841 /* Check whether arg is all digits (and sign). */
844 if (*q
== '-' || *q
== '+')
846 while (*q
>= '0' && *q
<= '9')
849 if (q
!= *argptr
&& (*q
== 0 || *q
== ' ' || *q
== '\t' || *q
== ','))
850 /* We found a token consisting of all digits -- at least one digit. */
851 return decode_all_digits (argptr
, default_symtab
, default_line
,
852 canonical
, file_symtab
, q
);
854 /* Arg token is not digits => try it as a variable name
855 Find the next token (everything up to end or next whitespace). */
857 if (**argptr
== '$') /* May be a convenience variable. */
858 /* One or two $ chars possible. */
859 p
= skip_quoted (*argptr
+ (((*argptr
)[1] == '$') ? 2 : 1));
864 error (_("Unmatched single quote."));
866 else if (is_objc_method
)
868 /* allow word separators in method names for Obj-C */
869 p
= skip_quoted_chars (*argptr
, NULL
, "");
871 else if (paren_pointer
!= NULL
)
873 p
= paren_pointer
+ 1;
877 p
= skip_quoted (*argptr
);
880 /* Keep any template parameters */
882 p
= find_template_name_end (p
);
884 copy
= (char *) alloca (p
- *argptr
+ 1);
885 memcpy (copy
, *argptr
, p
- *argptr
);
886 copy
[p
- *argptr
] = '\0';
889 && copy
[0] == copy
[p
- *argptr
- 1]
890 && strchr (get_gdb_completer_quote_characters (), copy
[0]) != NULL
)
892 copy
[p
- *argptr
- 1] = '\0';
896 copy
[p
- *argptr
- 1] = '\0';
897 while (*p
== ' ' || *p
== '\t')
901 /* If it starts with $: may be a legitimate variable or routine name
902 (e.g. HP-UX millicode routines such as $$dyncall), or it may
903 be history value, or it may be a convenience variable. */
906 return decode_dollar (copy
, funfirstline
, default_symtab
,
907 canonical
, file_symtab
);
909 /* Look up that token as a variable.
910 If file specified, use that file's per-file block to start with. */
912 return decode_variable (copy
, funfirstline
, canonical
,
913 file_symtab
, not_found_ptr
);
918 /* Now, more helper functions for decode_line_1. Some conventions
919 that these functions follow:
921 Decode_line_1 typically passes along some of its arguments or local
922 variables to the subfunctions. It passes the variables by
923 reference if they are modified by the subfunction, and by value
926 Some of the functions have side effects that don't arise from
927 variables that are passed by reference. In particular, if a
928 function is passed ARGPTR as an argument, it modifies what ARGPTR
929 points to; typically, it advances *ARGPTR past whatever substring
930 it has just looked at. (If it doesn't modify *ARGPTR, then the
931 function gets passed *ARGPTR instead, which is then called ARG: see
932 set_flags, for example.) Also, functions that return a struct
933 symtabs_and_lines may modify CANONICAL, as in the description of
936 If a function returns a struct symtabs_and_lines, then that struct
937 will immediately make its way up the call chain to be returned by
938 decode_line_1. In particular, all of the functions decode_XXX
939 calculate the appropriate struct symtabs_and_lines, under the
940 assumption that their argument is of the form XXX. */
942 /* First, some functions to initialize stuff at the beggining of the
946 initialize_defaults (struct symtab
**default_symtab
, int *default_line
)
948 if (*default_symtab
== 0)
950 /* Use whatever we have for the default source line. We don't use
951 get_current_or_default_symtab_and_line as it can recurse and call
953 struct symtab_and_line cursal
=
954 get_current_source_symtab_and_line ();
956 *default_symtab
= cursal
.symtab
;
957 *default_line
= cursal
.line
;
962 set_flags (char *arg
, int *is_quoted
, char **paren_pointer
)
967 /* 'has_if' is for the syntax:
968 (gdb) break foo if (a==b)
970 if ((ii
= strstr (arg
, " if ")) != NULL
||
971 (ii
= strstr (arg
, "\tif ")) != NULL
||
972 (ii
= strstr (arg
, " if\t")) != NULL
||
973 (ii
= strstr (arg
, "\tif\t")) != NULL
||
974 (ii
= strstr (arg
, " if(")) != NULL
||
975 (ii
= strstr (arg
, "\tif( ")) != NULL
)
977 /* Temporarily zap out "if (condition)" to not confuse the
978 parenthesis-checking code below. This is undone below. Do not
986 && strchr (get_gdb_completer_quote_characters (),
989 *paren_pointer
= strchr (arg
, '(');
990 if (*paren_pointer
!= NULL
)
991 *paren_pointer
= strrchr (*paren_pointer
, ')');
993 /* Now that we're safely past the paren_pointer check, put back " if
994 (condition)" so outer layers can see it. */
1001 /* Decode arg of the form *PC. */
1003 static struct symtabs_and_lines
1004 decode_indirect (char **argptr
)
1006 struct symtabs_and_lines values
;
1010 pc
= parse_and_eval_address_1 (argptr
);
1012 values
.sals
= (struct symtab_and_line
*)
1013 xmalloc (sizeof (struct symtab_and_line
));
1016 values
.sals
[0] = find_pc_line (pc
, 0);
1017 values
.sals
[0].pc
= pc
;
1018 values
.sals
[0].section
= find_pc_overlay (pc
);
1019 values
.sals
[0].explicit_pc
= 1;
1026 /* Locate the first half of the linespec, ending in a colon, period,
1027 or whitespace. (More or less.) Also, check to see if *ARGPTR is
1028 enclosed in double quotes; if so, set is_quote_enclosed, advance
1029 ARGPTR past that and zero out the trailing double quote.
1030 If ARGPTR is just a simple name like "main", p will point to ""
1034 locate_first_half (char **argptr
, int *is_quote_enclosed
)
1040 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
1041 and we must isolate the first half. Outer layers will call again later
1042 for the second half.
1044 Don't count commas that appear in argument lists of overloaded
1045 functions, or in quoted strings. It's stupid to go to this much
1046 trouble when the rest of the function is such an obvious roach hotel. */
1047 ii
= find_toplevel_char (*argptr
, ',');
1048 has_comma
= (ii
!= 0);
1050 /* Temporarily zap out second half to not confuse the code below.
1051 This is undone below. Do not change ii!! */
1057 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be
1058 CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore
1064 *is_quote_enclosed
= 1;
1070 *is_quote_enclosed
= 0;
1071 if (strchr (get_gdb_completer_quote_characters (), *p
))
1081 char *temp_end
= find_template_name_end (p
);
1083 error (_("malformed template specification in command"));
1086 /* Check for a colon and a plus or minus and a [ (which
1087 indicates an Objective-C method) */
1088 if (is_objc_method_format (p
))
1092 /* Check for the end of the first half of the linespec. End of
1093 line, a tab, a double colon or the last single colon, or a
1094 space. But if enclosed in double quotes we do not break on
1099 && ((p
[1] == ':') || (strchr (p
+ 1, ':') == NULL
)))
1100 || ((p
[0] == ' ') && !*is_quote_enclosed
))
1102 if (p
[0] == '.' && strchr (p
, ':') == NULL
)
1104 /* Java qualified method. Find the *last* '.', since the
1105 others are package qualifiers. */
1106 for (p1
= p
; *p1
; p1
++)
1114 while (p
[0] == ' ' || p
[0] == '\t')
1117 /* If the closing double quote was left at the end, remove it. */
1118 if (*is_quote_enclosed
)
1120 char *closing_quote
= strchr (p
- 1, '"');
1121 if (closing_quote
&& closing_quote
[1] == '\0')
1122 *closing_quote
= '\0';
1125 /* Now that we've safely parsed the first half, put back ',' so
1126 outer layers can see it. */
1135 /* Here's where we recognise an Objective-C Selector. An Objective C
1136 selector may be implemented by more than one class, therefore it
1137 may represent more than one method/function. This gives us a
1138 situation somewhat analogous to C++ overloading. If there's more
1139 than one method that could represent the selector, then use some of
1140 the existing C++ code to let the user choose one. */
1142 struct symtabs_and_lines
1143 decode_objc (char **argptr
, int funfirstline
, struct symtab
*file_symtab
,
1144 char ***canonical
, char *saved_arg
)
1146 struct symtabs_and_lines values
;
1147 struct symbol
**sym_arr
= NULL
;
1148 struct symbol
*sym
= NULL
;
1150 struct block
*block
= NULL
;
1157 if (file_symtab
!= NULL
)
1158 block
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
), STATIC_BLOCK
);
1161 enum language save_language
;
1163 /* get_selected_block can change the current language when there is
1164 no selected frame yet. */
1165 save_language
= current_language
->la_language
;
1166 block
= get_selected_block (0);
1167 set_language (save_language
);
1170 copy
= find_imps (file_symtab
, block
, *argptr
, NULL
, &i1
, &i2
);
1174 sym_arr
= (struct symbol
**) alloca ((i1
+ 1) * sizeof (struct symbol
*));
1177 copy
= find_imps (file_symtab
, block
, *argptr
, sym_arr
, &i1
, &i2
);
1181 /* i1 now represents the TOTAL number of matches found.
1182 i2 represents how many HIGH-LEVEL (struct symbol) matches,
1183 which will come first in the sym_arr array. Any low-level
1184 (minimal_symbol) matches will follow those. */
1190 /* Already a struct symbol. */
1195 sym
= find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr
[0]));
1196 if ((sym
!= NULL
) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr
[0]), SYMBOL_LINKAGE_NAME (sym
)) != 0)
1198 warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym
));
1203 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
1206 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1208 /* Canonicalize this, so it remains resolved for dylib loads. */
1209 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1210 build_canonical_line_spec (values
.sals
, SYMBOL_NATURAL_NAME (sym
), canonical
);
1214 /* The only match was a non-debuggable symbol, which might point
1215 to a function descriptor; resolve it to the actual code address
1217 struct minimal_symbol
*msymbol
= (struct minimal_symbol
*)sym_arr
[0];
1218 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1219 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1220 CORE_ADDR pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
1222 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
, pc
,
1225 init_sal (&values
.sals
[0]);
1226 values
.sals
[0].pc
= pc
;
1233 /* More than one match. The user must choose one or more. */
1234 return decode_line_2 (sym_arr
, i2
, funfirstline
, canonical
);
1240 /* This handles C++ and Java compound data structures. P should point
1241 at the first component separator, i.e. double-colon or period. As
1242 an example, on entrance to this function we could have ARGPTR
1243 pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */
1245 static struct symtabs_and_lines
1246 decode_compound (char **argptr
, int funfirstline
, char ***canonical
,
1247 char *saved_arg
, char *p
, int *not_found_ptr
)
1249 struct symtabs_and_lines values
;
1251 char *saved_arg2
= *argptr
;
1255 struct symbol
*sym_class
;
1256 struct symbol
**sym_arr
;
1259 /* First check for "global" namespace specification, of the form
1260 "::foo". If found, skip over the colons and jump to normal
1261 symbol processing. I.e. the whole line specification starts with
1262 "::" (note the condition that *argptr == p). */
1264 && ((*argptr
== p
) || (p
[-1] == ' ') || (p
[-1] == '\t')))
1267 /* Given our example "AAA::inA::fun", we have two cases to consider:
1269 1) AAA::inA is the name of a class. In that case, presumably it
1270 has a method called "fun"; we then look up that method using
1273 2) AAA::inA isn't the name of a class. In that case, either the
1274 user made a typo or AAA::inA is the name of a namespace.
1275 Either way, we just look up AAA::inA::fun with lookup_symbol.
1277 Thus, our first task is to find everything before the last set of
1278 double-colons and figure out if it's the name of a class. So we
1279 first loop through all of the double-colons. */
1281 p2
= p
; /* Save for restart. */
1283 /* This is very messy. Following the example above we have now the
1286 argptr -> "AAA::inA::fun
1287 saved_arg -> "AAA::inA::fun
1288 saved_arg2 -> "AAA::inA::fun
1289 p2 -> "::inA::fun". */
1291 /* In the loop below, with these strings, we'll make 2 passes, each
1292 is marked in comments.*/
1296 /* Move pointer up to next possible class/namespace token. */
1298 p
= p2
+ 1; /* Restart with old value +1. */
1300 /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun",
1301 i.e. if there is a double-colon, p will now point to the
1303 /* PASS2: p2->"::fun", p->":fun" */
1305 /* Move pointer ahead to next double-colon. */
1306 while (*p
&& (p
[0] != ' ') && (p
[0] != '\t') && (p
[0] != '\''))
1308 if (current_language
->la_language
== language_cplus
)
1309 p
+= cp_validate_operator (p
);
1313 temp_end
= find_template_name_end (p
);
1315 error (_("malformed template specification in command"));
1318 /* Note that, since, at the start of this loop, p would be
1319 pointing to the second colon in a double-colon, we only
1320 satisfy the condition below if there is another
1321 double-colon to the right (after). I.e. there is another
1322 component that can be a class or a namespace. I.e, if at
1323 the beginning of this loop (PASS1), we had
1324 p->":inA::fun", we'll trigger this when p has been
1325 advanced to point to "::fun". */
1326 /* PASS2: we will not trigger this. */
1327 else if ((p
[0] == ':') && (p
[1] == ':'))
1328 break; /* Found double-colon. */
1330 /* PASS2: We'll keep getting here, until p->"", at which point
1331 we exit this loop. */
1336 break; /* Out of the while (1). This would happen
1337 for instance if we have looked up
1338 unsuccessfully all the components of the
1339 string, and p->""(PASS2) */
1341 /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e
1343 /* Save restart for next time around. */
1345 /* Restore argptr as it was on entry to this function. */
1346 *argptr
= saved_arg2
;
1347 /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun",
1350 /* All ready for next pass through the loop. */
1354 /* Start of lookup in the symbol tables. */
1356 /* Lookup in the symbol table the substring between argptr and
1357 p. Note, this call changes the value of argptr. */
1358 /* Before the call, argptr->"AAA::inA::fun",
1359 p->"", p2->"::fun". After the call: argptr->"fun", p, p2
1361 sym_class
= lookup_prefix_sym (argptr
, p2
);
1363 /* If sym_class has been found, and if "AAA::inA" is a class, then
1364 we're in case 1 above. So we look up "fun" as a method of that
1367 (t
= check_typedef (SYMBOL_TYPE (sym_class
)),
1368 (TYPE_CODE (t
) == TYPE_CODE_STRUCT
1369 || TYPE_CODE (t
) == TYPE_CODE_UNION
)))
1371 /* Arg token is not digits => try it as a function name.
1372 Find the next token (everything up to end or next
1375 && strchr (get_gdb_completer_quote_characters (),
1378 p
= skip_quoted (*argptr
);
1379 *argptr
= *argptr
+ 1;
1383 /* At this point argptr->"fun". */
1385 while (*p
&& *p
!= ' ' && *p
!= '\t' && *p
!= ',' && *p
!= ':')
1387 /* At this point p->"". String ended. */
1388 /* Nope, C++ operators could have spaces in them
1389 ("foo::operator <" or "foo::operator delete []").
1390 I apologize, this is a bit hacky... */
1391 if (current_language
->la_language
== language_cplus
1392 && *p
== ' ' && p
- 8 - *argptr
+ 1 > 0)
1394 /* The above loop has already swallowed "operator". */
1395 p
+= cp_validate_operator (p
- 8) - 8;
1399 /* Allocate our own copy of the substring between argptr and
1401 copy
= (char *) alloca (p
- *argptr
+ 1);
1402 memcpy (copy
, *argptr
, p
- *argptr
);
1403 copy
[p
- *argptr
] = '\0';
1405 && copy
[p
- *argptr
- 1]
1406 && strchr (get_gdb_completer_quote_characters (),
1407 copy
[p
- *argptr
- 1]) != NULL
)
1408 copy
[p
- *argptr
- 1] = '\0';
1410 /* At this point copy->"fun", p->"" */
1412 /* No line number may be specified. */
1413 while (*p
== ' ' || *p
== '\t')
1416 /* At this point arptr->"". */
1418 /* Look for copy as a method of sym_class. */
1419 /* At this point copy->"fun", sym_class is "AAA:inA",
1420 saved_arg->"AAA::inA::fun". This concludes the scanning of
1421 the string for possible components matches. If we find it
1422 here, we return. If not, and we are at the and of the string,
1423 we'll lookup the whole string in the symbol tables. */
1425 return find_method (funfirstline
, canonical
, saved_arg
,
1426 copy
, t
, sym_class
, not_found_ptr
);
1428 } /* End if symbol found */
1431 /* We couldn't find a class, so we're in case 2 above. We check the
1432 entire name as a symbol instead. */
1434 copy
= (char *) alloca (p
- saved_arg2
+ 1);
1435 memcpy (copy
, saved_arg2
, p
- saved_arg2
);
1436 /* Note: if is_quoted should be true, we snuff out quote here
1438 copy
[p
- saved_arg2
] = '\000';
1439 /* Set argptr to skip over the name. */
1440 *argptr
= (*p
== '\'') ? p
+ 1 : p
;
1442 /* Look up entire name */
1443 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1445 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1447 /* Couldn't find any interpretation as classes/namespaces, so give
1448 up. The quotes are important if copy is empty. */
1451 cplusplus_error (saved_arg
,
1452 "Can't find member of namespace, class, struct, or union named \"%s\"\n",
1456 /* Next come some helper functions for decode_compound. */
1458 /* Return the symbol corresponding to the substring of *ARGPTR ending
1459 at P, allowing whitespace. Also, advance *ARGPTR past the symbol
1460 name in question, the compound object separator ("::" or "."), and
1461 whitespace. Note that *ARGPTR is changed whether or not the
1462 lookup_symbol call finds anything (i.e we return NULL). As an
1463 example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */
1465 static struct symbol
*
1466 lookup_prefix_sym (char **argptr
, char *p
)
1472 /* Extract the class name. */
1474 while (p
!= *argptr
&& p
[-1] == ' ')
1476 copy
= (char *) alloca (p
- *argptr
+ 1);
1477 memcpy (copy
, *argptr
, p
- *argptr
);
1478 copy
[p
- *argptr
] = 0;
1480 /* Discard the class name from the argptr. */
1481 p
= p1
+ (p1
[0] == ':' ? 2 : 1);
1482 while (*p
== ' ' || *p
== '\t')
1486 /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA",
1487 argptr->"inA::fun" */
1489 sym
= lookup_symbol (copy
, 0, STRUCT_DOMAIN
, 0);
1492 /* Typedefs are in VAR_DOMAIN so the above symbol lookup will
1493 fail when the user attempts to lookup a method of a class
1494 via a typedef'd name (NOT via the class's name, which is already
1495 handled in symbol_matches_domain). So try the lookup again
1496 using VAR_DOMAIN (where typedefs live) and double-check that we
1497 found a struct/class type. */
1498 struct symbol
*s
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1501 struct type
*t
= SYMBOL_TYPE (s
);
1503 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
1511 /* This finds the method COPY in the class whose type is T and whose
1512 symbol is SYM_CLASS. */
1514 static struct symtabs_and_lines
1515 find_method (int funfirstline
, char ***canonical
, char *saved_arg
,
1516 char *copy
, struct type
*t
, struct symbol
*sym_class
, int *not_found_ptr
)
1518 struct symtabs_and_lines values
;
1519 struct symbol
*sym
= NULL
;
1520 int i1
; /* Counter for the symbol array. */
1521 struct symbol
**sym_arr
= alloca (total_number_of_methods (t
)
1522 * sizeof (struct symbol
*));
1524 /* Find all methods with a matching name, and put them in
1527 i1
= find_methods (t
, copy
, SYMBOL_LANGUAGE (sym_class
), sym_arr
);
1531 /* There is exactly one field with that name. */
1534 if (sym
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1536 values
.sals
= (struct symtab_and_line
*)
1537 xmalloc (sizeof (struct symtab_and_line
));
1539 values
.sals
[0] = find_function_start_sal (sym
,
1551 /* There is more than one field with that name
1552 (overloaded). Ask the user which one to use. */
1553 return decode_line_2 (sym_arr
, i1
, funfirstline
, canonical
);
1560 cplusplus_error (saved_arg
,
1561 "the class `%s' does not have destructor defined\n",
1562 SYMBOL_PRINT_NAME (sym_class
));
1564 cplusplus_error (saved_arg
,
1565 "the class %s does not have any method named %s\n",
1566 SYMBOL_PRINT_NAME (sym_class
), copy
);
1572 /* Return the symtab associated to the filename given by the substring
1573 of *ARGPTR ending at P, and advance ARGPTR past that filename. If
1574 NOT_FOUND_PTR is not null and the source file is not found, store
1575 boolean true at the location pointed to and do not issue an
1578 static struct symtab
*
1579 symtab_from_filename (char **argptr
, char *p
, int is_quote_enclosed
,
1584 struct symtab
*file_symtab
;
1587 while (p
!= *argptr
&& p
[-1] == ' ')
1589 if ((*p
== '"') && is_quote_enclosed
)
1591 copy
= (char *) alloca (p
- *argptr
+ 1);
1592 memcpy (copy
, *argptr
, p
- *argptr
);
1593 /* It may have the ending quote right after the file name. */
1594 if ((is_quote_enclosed
&& copy
[p
- *argptr
- 1] == '"')
1595 || copy
[p
- *argptr
- 1] == '\'')
1596 copy
[p
- *argptr
- 1] = 0;
1598 copy
[p
- *argptr
] = 0;
1600 /* Find that file's data. */
1601 file_symtab
= lookup_symtab (copy
);
1602 if (file_symtab
== 0)
1606 if (!have_full_symbols () && !have_partial_symbols ())
1607 throw_error (NOT_FOUND_ERROR
,
1608 _("No symbol table is loaded. Use the \"file\" command."));
1609 throw_error (NOT_FOUND_ERROR
, _("No source file named %s."), copy
);
1612 /* Discard the file name from the arg. */
1614 while (*p
== ' ' || *p
== '\t')
1623 /* This decodes a line where the argument is all digits (possibly
1624 preceded by a sign). Q should point to the end of those digits;
1625 the other arguments are as usual. */
1627 static struct symtabs_and_lines
1628 decode_all_digits (char **argptr
, struct symtab
*default_symtab
,
1629 int default_line
, char ***canonical
,
1630 struct symtab
*file_symtab
, char *q
)
1633 struct symtabs_and_lines values
;
1634 struct symtab_and_line val
;
1642 /* We might need a canonical line spec if no file was specified. */
1643 int need_canonical
= (file_symtab
== NULL
) ? 1 : 0;
1647 val
.pspace
= current_program_space
;
1649 /* This is where we need to make sure that we have good defaults.
1650 We must guarantee that this section of code is never executed
1651 when we are called with just a function name, since
1652 set_default_source_symtab_and_line uses
1653 select_source_symtab that calls us with such an argument. */
1655 if (file_symtab
== 0 && default_symtab
== 0)
1657 /* Make sure we have at least a default source file. */
1658 set_default_source_symtab_and_line ();
1659 initialize_defaults (&default_symtab
, &default_line
);
1662 if (**argptr
== '+')
1663 sign
= plus
, (*argptr
)++;
1664 else if (**argptr
== '-')
1665 sign
= minus
, (*argptr
)++;
1666 val
.line
= atoi (*argptr
);
1672 if (file_symtab
== 0)
1673 val
.line
= default_line
+ val
.line
;
1678 if (file_symtab
== 0)
1679 val
.line
= default_line
- val
.line
;
1684 break; /* No need to adjust val.line. */
1687 while (*q
== ' ' || *q
== '\t')
1690 if (file_symtab
== 0)
1691 file_symtab
= default_symtab
;
1693 /* It is possible that this source file has more than one symtab,
1694 and that the new line number specification has moved us from the
1695 default (in file_symtab) to a new one. */
1696 val
.symtab
= find_line_symtab (file_symtab
, val
.line
, NULL
, NULL
);
1697 if (val
.symtab
== 0)
1698 val
.symtab
= file_symtab
;
1700 val
.pspace
= SYMTAB_PSPACE (val
.symtab
);
1702 values
.sals
= (struct symtab_and_line
*)
1703 xmalloc (sizeof (struct symtab_and_line
));
1704 values
.sals
[0] = val
;
1707 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1708 values
.sals
[0].explicit_line
= 1;
1714 /* Decode a linespec starting with a dollar sign. */
1716 static struct symtabs_and_lines
1717 decode_dollar (char *copy
, int funfirstline
, struct symtab
*default_symtab
,
1718 char ***canonical
, struct symtab
*file_symtab
)
1722 int need_canonical
= 0;
1723 struct symtabs_and_lines values
;
1724 struct symtab_and_line val
;
1727 struct minimal_symbol
*msymbol
;
1729 p
= (copy
[1] == '$') ? copy
+ 2 : copy
+ 1;
1730 while (*p
>= '0' && *p
<= '9')
1732 if (!*p
) /* Reached end of token without hitting non-digit. */
1734 /* We have a value history reference. */
1735 struct value
*val_history
;
1736 sscanf ((copy
[1] == '$') ? copy
+ 2 : copy
+ 1, "%d", &index
);
1737 val_history
= access_value_history ((copy
[1] == '$') ? -index
: index
);
1738 if (TYPE_CODE (value_type (val_history
)) != TYPE_CODE_INT
)
1739 error (_("History values used in line specs must have integer values."));
1740 valx
= value_as_long (val_history
);
1744 /* Not all digits -- may be user variable/function or a
1745 convenience variable. */
1747 /* Look up entire name as a symbol first. */
1748 sym
= lookup_symbol (copy
, 0, VAR_DOMAIN
, 0);
1749 file_symtab
= (struct symtab
*) NULL
;
1751 /* Symbol was found --> jump to normal symbol processing. */
1753 return symbol_found (funfirstline
, canonical
, copy
, sym
, NULL
);
1755 /* If symbol was not found, look in minimal symbol tables. */
1756 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1757 /* Min symbol was found --> jump to minsym processing. */
1759 return minsym_found (funfirstline
, msymbol
);
1761 /* Not a user variable or function -- must be convenience variable. */
1762 if (!get_internalvar_integer (lookup_internalvar (copy
+ 1), &valx
))
1763 error (_("Convenience variables used in line specs must have integer values."));
1768 /* Either history value or convenience value from above, in valx. */
1769 val
.symtab
= file_symtab
? file_symtab
: default_symtab
;
1772 val
.pspace
= current_program_space
;
1774 values
.sals
= (struct symtab_and_line
*) xmalloc (sizeof val
);
1775 values
.sals
[0] = val
;
1779 build_canonical_line_spec (values
.sals
, NULL
, canonical
);
1786 /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL,
1787 look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and
1788 the function cannot be found, store boolean true in the location pointed to
1789 and do not issue an error message. */
1791 static struct symtabs_and_lines
1792 decode_variable (char *copy
, int funfirstline
, char ***canonical
,
1793 struct symtab
*file_symtab
, int *not_found_ptr
)
1797 struct minimal_symbol
*msymbol
;
1799 sym
= lookup_symbol (copy
,
1801 ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab
),
1803 : get_selected_block (0)),
1807 return symbol_found (funfirstline
, canonical
, copy
, sym
, file_symtab
);
1809 msymbol
= lookup_minimal_symbol (copy
, NULL
, NULL
);
1811 if (msymbol
!= NULL
)
1812 return minsym_found (funfirstline
, msymbol
);
1817 if (!have_full_symbols ()
1818 && !have_partial_symbols ()
1819 && !have_minimal_symbols ())
1820 throw_error (NOT_FOUND_ERROR
,
1821 _("No symbol table is loaded. Use the \"file\" command."));
1822 throw_error (NOT_FOUND_ERROR
, _("Function \"%s\" not defined."), copy
);
1828 /* Now come some functions that are called from multiple places within
1831 /* We've found a symbol SYM to associate with our linespec; build a
1832 corresponding struct symtabs_and_lines. */
1834 static struct symtabs_and_lines
1835 symbol_found (int funfirstline
, char ***canonical
, char *copy
,
1836 struct symbol
*sym
, struct symtab
*file_symtab
)
1838 struct symtabs_and_lines values
;
1840 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1842 /* Arg is the name of a function */
1843 values
.sals
= (struct symtab_and_line
*)
1844 xmalloc (sizeof (struct symtab_and_line
));
1845 values
.sals
[0] = find_function_start_sal (sym
, funfirstline
);
1848 /* Don't use the SYMBOL_LINE; if used at all it points to
1849 the line containing the parameters or thereabouts, not
1850 the first line of code. */
1852 /* We might need a canonical line spec if it is a static
1854 if (file_symtab
== 0)
1856 struct blockvector
*bv
= BLOCKVECTOR (SYMBOL_SYMTAB (sym
));
1857 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1858 if (lookup_block_symbol (b
, copy
, NULL
, VAR_DOMAIN
) != NULL
)
1859 build_canonical_line_spec (values
.sals
, copy
, canonical
);
1866 error (_("\"%s\" is not a function"), copy
);
1867 else if (SYMBOL_LINE (sym
) != 0)
1869 /* We know its line number. */
1870 values
.sals
= (struct symtab_and_line
*)
1871 xmalloc (sizeof (struct symtab_and_line
));
1873 memset (&values
.sals
[0], 0, sizeof (values
.sals
[0]));
1874 values
.sals
[0].symtab
= SYMBOL_SYMTAB (sym
);
1875 values
.sals
[0].line
= SYMBOL_LINE (sym
);
1879 /* This can happen if it is compiled with a compiler which doesn't
1880 put out line numbers for variables. */
1881 /* FIXME: Shouldn't we just set .line and .symtab to zero
1882 and return? For example, "info line foo" could print
1884 error (_("Line number not known for symbol \"%s\""), copy
);
1888 /* We've found a minimal symbol MSYMBOL to associate with our
1889 linespec; build a corresponding struct symtabs_and_lines. */
1891 static struct symtabs_and_lines
1892 minsym_found (int funfirstline
, struct minimal_symbol
*msymbol
)
1894 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1895 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1896 struct symtabs_and_lines values
;
1899 values
.sals
= (struct symtab_and_line
*)
1900 xmalloc (sizeof (struct symtab_and_line
));
1901 values
.sals
[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol
),
1902 (struct obj_section
*) 0, 0);
1903 values
.sals
[0].section
= SYMBOL_OBJ_SECTION (msymbol
);
1905 /* The minimal symbol might point to a function descriptor;
1906 resolve it to the actual code address instead. */
1907 pc
= gdbarch_convert_from_func_ptr_addr (gdbarch
,
1910 if (pc
!= values
.sals
[0].pc
)
1911 values
.sals
[0] = find_pc_sect_line (pc
, NULL
, 0);
1915 struct symtab_and_line sal
;
1917 values
.sals
[0].pc
= find_function_start_pc (gdbarch
,
1919 values
.sals
[0].section
);
1921 sal
= find_pc_sect_line (values
.sals
[0].pc
, values
.sals
[0].section
, 0);
1923 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
1924 line is still part of the same function. If there is no
1925 line information here, sal.pc will be the passed in PC. */
1926 if (sal
.pc
!= values
.sals
[0].pc
1927 && (lookup_minimal_symbol_by_pc_section (values
.sals
[0].pc
,
1928 values
.sals
[0].section
)
1929 == lookup_minimal_symbol_by_pc_section (sal
.end
,
1930 values
.sals
[0].section
)))
1931 /* Recalculate the line number (might not be N+1). */
1932 values
.sals
[0] = find_pc_sect_line (sal
.end
, values
.sals
[0].section
, 0);
This page took 0.068769 seconds and 4 git commands to generate.