1 /* Parser for linespec for the GNU debugger, GDB.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
30 #include "completer.h"
32 /* Prototype for one function in parser-defs.h,
33 instead of including that entire file. */
35 extern char *find_template_name_end (char *);
37 /* We share this one with symtab.c, but it is not exported widely. */
39 extern char *operator_chars (char *, char **);
41 /* Prototypes for local functions */
43 static void cplusplus_hint (char *name);
45 static int total_number_of_methods (struct type *type);
47 static int find_methods (struct type *, char *, struct symbol **);
49 static void build_canonical_line_spec (struct symtab_and_line *,
52 static char *find_toplevel_char (char *s, char c);
54 static struct symtabs_and_lines decode_line_2 (struct symbol *[],
57 /* Helper functions. */
59 /* While the C++ support is still in flux, issue a possibly helpful hint on
60 using the new command completion feature on single quoted demangled C++
61 symbols. Remove when loose ends are cleaned up. FIXME -fnf */
64 cplusplus_hint (char *name)
68 printf_filtered ("Hint: try '%s<TAB> or '%s<ESC-?>\n", name, name);
69 printf_filtered ("(Note leading single quote.)\n");
72 /* Return the number of methods described for TYPE, including the
73 methods from types it derives from. This can't be done in the symbol
74 reader because the type of the baseclass might still be stubbed
75 when the definition of the derived class is parsed. */
78 total_number_of_methods (struct type *type)
84 if (TYPE_CPLUS_SPECIFIC (type) == NULL)
86 count = TYPE_NFN_FIELDS_TOTAL (type);
88 for (n = 0; n < TYPE_N_BASECLASSES (type); n++)
89 count += total_number_of_methods (TYPE_BASECLASS (type, n));
94 /* Recursive helper function for decode_line_1.
95 Look for methods named NAME in type T.
96 Return number of matches.
97 Put matches in SYM_ARR, which should have been allocated with
98 a size of total_number_of_methods (T) * sizeof (struct symbol *).
99 Note that this function is g++ specific. */
102 find_methods (struct type *t, char *name, struct symbol **sym_arr)
106 struct symbol *sym_class;
107 char *class_name = type_name_no_tag (t);
109 /* Ignore this class if it doesn't have a name. This is ugly, but
110 unless we figure out how to get the physname without the name of
111 the class, then the loop can't do any good. */
113 && (sym_class = lookup_symbol (class_name,
114 (struct block *) NULL,
117 (struct symtab **) NULL)))
121 /* FIXME: Shouldn't this just be CHECK_TYPEDEF (t)? */
122 t = SYMBOL_TYPE (sym_class);
124 /* Loop over each method name. At this level, all overloads of a name
125 are counted as a single name. There is an inner loop which loops over
128 for (method_counter = TYPE_NFN_FIELDS (t) - 1;
133 char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter);
136 if (strncmp (method_name, "__", 2) == 0 ||
137 strncmp (method_name, "op", 2) == 0 ||
138 strncmp (method_name, "type", 4) == 0)
140 if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI))
141 method_name = dem_opname;
142 else if (cplus_demangle_opname (method_name, dem_opname, 0))
143 method_name = dem_opname;
146 if (STREQ (name, method_name))
147 /* Find all the overloaded methods with that name. */
148 for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1;
155 f = TYPE_FN_FIELDLIST1 (t, method_counter);
157 if (TYPE_FN_FIELD_STUB (f, field_counter))
161 tmp_name = gdb_mangle_name (t,
164 phys_name = alloca (strlen (tmp_name) + 1);
165 strcpy (phys_name, tmp_name);
169 phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter);
171 /* Destructor is handled by caller, dont add it to the list */
172 if (DESTRUCTOR_PREFIX_P (phys_name))
175 sym_arr[i1] = lookup_symbol (phys_name,
178 (struct symtab **) NULL);
183 /* This error message gets printed, but the method
184 still seems to be found
185 fputs_filtered("(Cannot find method ", gdb_stdout);
186 fprintf_symbol_filtered (gdb_stdout, phys_name,
188 DMGL_PARAMS | DMGL_ANSI);
189 fputs_filtered(" - possibly inlined.)\n", gdb_stdout);
196 /* Only search baseclasses if there is no match yet, since names in
197 derived classes override those in baseclasses.
199 FIXME: The above is not true; it is only true of member functions
200 if they have the same number of arguments (??? - section 13.1 of the
201 ARM says the function members are not in the same scope but doesn't
202 really spell out the rules in a way I understand. In any case, if
203 the number of arguments differ this is a case in which we can overload
204 rather than hiding without any problem, and gcc 2.4.5 does overload
205 rather than hiding in this case). */
208 for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++)
209 i1 += find_methods (TYPE_BASECLASS (t, ibase), name, sym_arr + i1);
214 /* Helper function for decode_line_1.
215 Build a canonical line spec in CANONICAL if it is non-NULL and if
216 the SAL has a symtab.
217 If SYMNAME is non-NULL the canonical line spec is `filename:symname'.
218 If SYMNAME is NULL the line number from SAL is used and the canonical
219 line spec is `filename:linenum'. */
222 build_canonical_line_spec (struct symtab_and_line *sal, char *symname,
225 char **canonical_arr;
226 char *canonical_name;
228 struct symtab *s = sal->symtab;
230 if (s == (struct symtab *) NULL
231 || s->filename == (char *) NULL
232 || canonical == (char ***) NULL)
235 canonical_arr = (char **) xmalloc (sizeof (char *));
236 *canonical = canonical_arr;
238 filename = s->filename;
241 canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2);
242 sprintf (canonical_name, "%s:%s", filename, symname);
246 canonical_name = xmalloc (strlen (filename) + 30);
247 sprintf (canonical_name, "%s:%d", filename, sal->line);
249 canonical_arr[0] = canonical_name;
254 /* Find an instance of the character C in the string S that is outside
255 of all parenthesis pairs, single-quoted strings, and double-quoted
258 find_toplevel_char (char *s, char c)
260 int quoted = 0; /* zero if we're not in quotes;
261 '"' if we're in a double-quoted string;
262 '\'' if we're in a single-quoted string. */
263 int depth = 0; /* number of unclosed parens we've seen */
266 for (scan = s; *scan; scan++)
272 else if (*scan == '\\' && *(scan + 1))
275 else if (*scan == c && ! quoted && depth == 0)
277 else if (*scan == '"' || *scan == '\'')
279 else if (*scan == '(')
281 else if (*scan == ')' && depth > 0)
288 /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to
289 operate on (ask user if necessary).
290 If CANONICAL is non-NULL return a corresponding array of mangled names
291 as canonical line specs there. */
293 static struct symtabs_and_lines
294 decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline,
297 struct symtabs_and_lines values, return_values;
302 struct cleanup *old_chain;
303 char **canonical_arr = (char **) NULL;
305 values.sals = (struct symtab_and_line *)
306 alloca (nelts * sizeof (struct symtab_and_line));
307 return_values.sals = (struct symtab_and_line *)
308 xmalloc (nelts * sizeof (struct symtab_and_line));
309 old_chain = make_cleanup (free, return_values.sals);
313 canonical_arr = (char **) xmalloc (nelts * sizeof (char *));
314 make_cleanup (free, canonical_arr);
315 memset (canonical_arr, 0, nelts * sizeof (char *));
316 *canonical = canonical_arr;
320 printf_unfiltered ("[0] cancel\n[1] all\n");
323 INIT_SAL (&return_values.sals[i]); /* initialize to zeroes */
324 INIT_SAL (&values.sals[i]);
325 if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK)
327 values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline);
328 printf_unfiltered ("[%d] %s at %s:%d\n",
330 SYMBOL_SOURCE_NAME (sym_arr[i]),
331 values.sals[i].symtab->filename,
332 values.sals[i].line);
335 printf_unfiltered ("?HERE\n");
339 if ((prompt = getenv ("PS2")) == NULL)
343 args = command_line_input (prompt, 0, "overload-choice");
345 if (args == 0 || *args == 0)
346 error_no_arg ("one or more choice numbers");
354 while (*arg1 >= '0' && *arg1 <= '9')
356 if (*arg1 && *arg1 != ' ' && *arg1 != '\t')
357 error ("Arguments must be choice numbers.");
367 for (i = 0; i < nelts; i++)
369 if (canonical_arr[i] == NULL)
371 symname = SYMBOL_NAME (sym_arr[i]);
372 canonical_arr[i] = savestring (symname, strlen (symname));
376 memcpy (return_values.sals, values.sals,
377 (nelts * sizeof (struct symtab_and_line)));
378 return_values.nelts = nelts;
379 discard_cleanups (old_chain);
380 return return_values;
383 if (num >= nelts + 2)
385 printf_unfiltered ("No choice number %d.\n", num);
390 if (values.sals[num].pc)
394 symname = SYMBOL_NAME (sym_arr[num]);
395 make_cleanup (free, symname);
396 canonical_arr[i] = savestring (symname, strlen (symname));
398 return_values.sals[i++] = values.sals[num];
399 values.sals[num].pc = 0;
403 printf_unfiltered ("duplicate request for %d ignored.\n", num);
408 while (*args == ' ' || *args == '\t')
411 return_values.nelts = i;
412 discard_cleanups (old_chain);
413 return return_values;
416 /* The parser of linespec itself. */
418 /* Parse a string that specifies a line number.
419 Pass the address of a char * variable; that variable will be
420 advanced over the characters actually parsed.
424 LINENUM -- that line number in current file. PC returned is 0.
425 FILE:LINENUM -- that line in that file. PC returned is 0.
426 FUNCTION -- line number of openbrace of that function.
427 PC returned is the start of the function.
428 VARIABLE -- line number of definition of that variable.
430 FILE:FUNCTION -- likewise, but prefer functions in that file.
431 *EXPR -- line in which address EXPR appears.
433 This may all be followed by an "if EXPR", which we ignore.
435 FUNCTION may be an undebuggable function found in minimal symbol table.
437 If the argument FUNFIRSTLINE is nonzero, we want the first line
438 of real code inside a function when a function is specified, and it is
439 not OK to specify a variable or type to get its line number.
441 DEFAULT_SYMTAB specifies the file to use if none is specified.
442 It defaults to current_source_symtab.
443 DEFAULT_LINE specifies the line number to use for relative
444 line numbers (that start with signs). Defaults to current_source_line.
445 If CANONICAL is non-NULL, store an array of strings containing the canonical
446 line specs there if necessary. Currently overloaded member functions and
447 line numbers or static functions without a filename yield a canonical
448 line spec. The array and the line spec strings are allocated on the heap,
449 it is the callers responsibility to free them.
451 Note that it is possible to return zero for the symtab
452 if no file is validly specified. Callers must check that.
453 Also, the line number returned may be invalid. */
455 /* We allow single quotes in various places. This is a hideous
456 kludge, which exists because the completer can't yet deal with the
457 lack of single quotes. FIXME: write a linespec_completer which we
458 can use as appropriate instead of make_symbol_completion_list. */
460 struct symtabs_and_lines
461 decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab,
462 int default_line, char ***canonical)
464 struct symtabs_and_lines values;
465 #ifdef HPPA_COMPILER_BUG
466 /* FIXME: The native HP 9000/700 compiler has a bug which appears
467 when optimizing this file with target i960-vxworks. I haven't
468 been able to construct a simple test case. The problem is that
469 in the second call to SKIP_PROLOGUE below, the compiler somehow
470 does not realize that the statement val = find_pc_line (...) will
471 change the values of the fields of val. It extracts the elements
472 into registers at the top of the block, and does not update the
473 registers after the call to find_pc_line. You can check this by
474 inserting a printf at the end of find_pc_line to show what values
475 it is returning for val.pc and val.end and another printf after
476 the call to see what values the function actually got (remember,
477 this is compiling with cc -O, with this patch removed). You can
478 also examine the assembly listing: search for the second call to
479 skip_prologue; the LDO statement before the next call to
480 find_pc_line loads the address of the structure which
481 find_pc_line will return; if there is a LDW just before the LDO,
482 which fetches an element of the structure, then the compiler
485 Setting val to volatile avoids the problem. We must undef
486 volatile, because the HPPA native compiler does not define
487 __STDC__, although it does understand volatile, and so volatile
488 will have been defined away in defs.h. */
490 volatile struct symtab_and_line val;
491 #define volatile /*nothing */
493 struct symtab_and_line val;
495 register char *p, *p1;
496 char *q, *pp, *ii, *p2;
500 register struct symtab *s;
502 register struct symbol *sym;
503 /* The symtab that SYM was found in. */
504 struct symtab *sym_symtab;
506 register CORE_ADDR pc;
507 register struct minimal_symbol *msymbol;
509 struct symbol *sym_class;
512 int is_quote_enclosed;
516 struct symbol **sym_arr;
518 char *saved_arg = *argptr;
519 extern char *gdb_completer_quote_characters;
521 INIT_SAL (&val); /* initialize to zeroes */
523 /* Defaults have defaults. */
525 if (default_symtab == 0)
527 default_symtab = current_source_symtab;
528 default_line = current_source_line;
531 /* See if arg is *PC */
536 pc = parse_and_eval_address_1 (argptr);
538 values.sals = (struct symtab_and_line *)
539 xmalloc (sizeof (struct symtab_and_line));
542 values.sals[0] = find_pc_line (pc, 0);
543 values.sals[0].pc = pc;
544 values.sals[0].section = find_pc_overlay (pc);
549 /* 'has_if' is for the syntax:
550 * (gdb) break foo if (a==b)
552 if ((ii = strstr (*argptr, " if ")) != NULL ||
553 (ii = strstr (*argptr, "\tif ")) != NULL ||
554 (ii = strstr (*argptr, " if\t")) != NULL ||
555 (ii = strstr (*argptr, "\tif\t")) != NULL ||
556 (ii = strstr (*argptr, " if(")) != NULL ||
557 (ii = strstr (*argptr, "\tif( ")) != NULL)
559 /* Temporarily zap out "if (condition)" to not
560 * confuse the parenthesis-checking code below.
561 * This is undone below. Do not change ii!!
568 /* Set various flags.
569 * 'has_parens' is important for overload checking, where
570 * we allow things like:
571 * (gdb) break c::f(int)
574 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */
576 is_quoted = (**argptr
577 && strchr (get_gdb_completer_quote_characters (),
580 has_parens = ((pp = strchr (*argptr, '(')) != NULL
581 && (pp = strrchr (pp, ')')) != NULL);
583 /* Now that we're safely past the has_parens check,
584 * put back " if (condition)" so outer layers can see it
589 /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM
590 and we must isolate the first half. Outer layers will call again later
593 Don't count commas that appear in argument lists of overloaded
594 functions, or in quoted strings. It's stupid to go to this much
595 trouble when the rest of the function is such an obvious roach hotel. */
596 ii = find_toplevel_char (*argptr, ',');
597 has_comma = (ii != 0);
599 /* Temporarily zap out second half to not
600 * confuse the code below.
601 * This is undone below. Do not change ii!!
608 /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */
609 /* May also be CLASS::MEMBER, or NAMESPACE::NAME */
610 /* Look for ':', but ignore inside of <> */
616 is_quote_enclosed = 1;
620 is_quote_enclosed = 0;
625 char *temp_end = find_template_name_end (p);
627 error ("malformed template specification in command");
630 /* Check for the end of the first half of the linespec. End of line,
631 a tab, a double colon or the last single colon, or a space. But
632 if enclosed in double quotes we do not break on enclosed spaces */
636 && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
637 || ((p[0] == ' ') && !is_quote_enclosed))
639 if (p[0] == '.' && strchr (p, ':') == NULL) /* Java qualified method. */
641 /* Find the *last* '.', since the others are package qualifiers. */
642 for (p1 = p; *p1; p1++)
650 while (p[0] == ' ' || p[0] == '\t')
653 /* if the closing double quote was left at the end, remove it */
654 if (is_quote_enclosed)
656 char *closing_quote = strchr (p, '"');
657 if (closing_quote && closing_quote[1] == '\0')
658 *closing_quote = '\0';
661 /* Now that we've safely parsed the first half,
662 * put back ',' so outer layers can see it
667 if ((p[0] == ':' || p[0] == '.') && !has_parens)
672 *argptr = *argptr + 1;
673 if (p[0] == '.' || p[1] == ':')
675 char *saved_arg2 = *argptr;
677 /* First check for "global" namespace specification,
678 of the form "::foo". If found, skip over the colons
679 and jump to normal symbol processing */
681 && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t')))
684 /* We have what looks like a class or namespace
685 scope specification (A::B), possibly with many
686 levels of namespaces or classes (A::B::C::D).
688 Some versions of the HP ANSI C++ compiler (as also possibly
689 other compilers) generate class/function/member names with
690 embedded double-colons if they are inside namespaces. To
691 handle this, we loop a few times, considering larger and
692 larger prefixes of the string as though they were single
693 symbols. So, if the initially supplied string is
694 A::B::C::D::foo, we have to look up "A", then "A::B",
695 then "A::B::C", then "A::B::C::D", and finally
696 "A::B::C::D::foo" as single, monolithic symbols, because
697 A, B, C or D may be namespaces.
699 Note that namespaces can nest only inside other
700 namespaces, and not inside classes. So we need only
701 consider *prefixes* of the string; there is no need to look up
702 "B::C" separately as a symbol in the previous example. */
704 p2 = p; /* save for restart */
707 /* Extract the class name. */
709 while (p != *argptr && p[-1] == ' ')
711 copy = (char *) alloca (p - *argptr + 1);
712 memcpy (copy, *argptr, p - *argptr);
713 copy[p - *argptr] = 0;
715 /* Discard the class name from the arg. */
716 p = p1 + (p1[0] == ':' ? 2 : 1);
717 while (*p == ' ' || *p == '\t')
721 sym_class = lookup_symbol (copy, 0, STRUCT_NAMESPACE, 0,
722 (struct symtab **) NULL);
725 (t = check_typedef (SYMBOL_TYPE (sym_class)),
726 (TYPE_CODE (t) == TYPE_CODE_STRUCT
727 || TYPE_CODE (t) == TYPE_CODE_UNION)))
729 /* Arg token is not digits => try it as a function name
730 Find the next token(everything up to end or next blank). */
732 && strchr (get_gdb_completer_quote_characters (),
735 p = skip_quoted (*argptr);
736 *argptr = *argptr + 1;
741 while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':')
745 q = operator_chars (*argptr, &q1);
749 char *tmp = alloca (q1 - q + 1);
750 memcpy (tmp, q, q1 - q);
752 opname = cplus_mangle_opname (tmp, DMGL_ANSI);
756 printf_filtered ("no mangling for \"%s\"\n", tmp);
757 cplusplus_hint (saved_arg);
758 return_to_top_level (RETURN_ERROR);
760 copy = (char*) alloca (3 + strlen(opname));
761 sprintf (copy, "__%s", opname);
767 copy = (char *) alloca (p - *argptr + 1);
768 memcpy (copy, *argptr, p - *argptr);
769 copy[p - *argptr] = '\0';
771 && copy[p - *argptr - 1]
772 && strchr (get_gdb_completer_quote_characters (),
773 copy[p - *argptr - 1]) != NULL)
774 copy[p - *argptr - 1] = '\0';
777 /* no line number may be specified */
778 while (*p == ' ' || *p == '\t')
783 i1 = 0; /* counter for the symbol array */
784 sym_arr = (struct symbol **) alloca (total_number_of_methods (t)
785 * sizeof (struct symbol *));
787 if (destructor_name_p (copy, t))
789 /* Destructors are a special case. */
790 int m_index, f_index;
792 if (get_destructor_fn_field (t, &m_index, &f_index))
794 struct fn_field *f = TYPE_FN_FIELDLIST1 (t, m_index);
797 lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, f_index),
798 NULL, VAR_NAMESPACE, (int *) NULL,
799 (struct symtab **) NULL);
805 i1 = find_methods (t, copy, sym_arr);
808 /* There is exactly one field with that name. */
811 if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
813 values.sals = (struct symtab_and_line *)
814 xmalloc (sizeof (struct symtab_and_line));
816 values.sals[0] = find_function_start_sal (sym,
827 /* There is more than one field with that name
828 (overloaded). Ask the user which one to use. */
829 return decode_line_2 (sym_arr, i1, funfirstline, canonical);
835 if (OPNAME_PREFIX_P (copy))
837 tmp = (char *) alloca (strlen (copy + 3) + 9);
838 strcpy (tmp, "operator ");
839 strcat (tmp, copy + 3);
846 ("the class `%s' does not have destructor defined\n",
847 SYMBOL_SOURCE_NAME (sym_class));
850 ("the class %s does not have any method named %s\n",
851 SYMBOL_SOURCE_NAME (sym_class), tmp);
852 cplusplus_hint (saved_arg);
853 return_to_top_level (RETURN_ERROR);
857 /* Move pointer up to next possible class/namespace token */
858 p = p2 + 1; /* restart with old value +1 */
859 /* Move pointer ahead to next double-colon */
860 while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\''))
864 temp_end = find_template_name_end (p);
866 error ("malformed template specification in command");
869 else if ((p[0] == ':') && (p[1] == ':'))
870 break; /* found double-colon */
876 break; /* out of the while (1) */
878 p2 = p; /* save restart for next time around */
879 *argptr = saved_arg2; /* restore argptr */
882 /* Last chance attempt -- check entire name as a symbol */
883 /* Use "copy" in preparation for jumping out of this block,
884 to be consistent with usage following the jump target */
885 copy = (char *) alloca (p - saved_arg2 + 1);
886 memcpy (copy, saved_arg2, p - saved_arg2);
887 /* Note: if is_quoted should be true, we snuff out quote here anyway */
888 copy[p - saved_arg2] = '\000';
889 /* Set argptr to skip over the name */
890 *argptr = (*p == '\'') ? p + 1 : p;
891 /* Look up entire name */
892 sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab);
893 s = (struct symtab *) 0;
894 /* Prepare to jump: restore the " if (condition)" so outer layers see it */
895 /* Symbol was found --> jump to normal symbol processing.
896 Code following "symbol_found" expects "copy" to have the
897 symbol name, "sym" to have the symbol pointer, "s" to be
898 a specified file's symtab, and sym_symtab to be the symbol's
900 /* By jumping there we avoid falling through the FILE:LINE and
901 FILE:FUNC processing stuff below */
905 /* Couldn't find any interpretation as classes/namespaces, so give up */
907 /* The quotes are important if copy is empty. */
909 ("Can't find member of namespace, class, struct, or union named \"%s\"\n", copy);
910 cplusplus_hint (saved_arg);
911 return_to_top_level (RETURN_ERROR);
916 /* Extract the file name. */
918 while (p != *argptr && p[-1] == ' ')
920 if ((*p == '"') && is_quote_enclosed)
922 copy = (char *) alloca (p - *argptr + 1);
923 if ((**argptr == '"') && is_quote_enclosed)
925 memcpy (copy, *argptr + 1, p - *argptr - 1);
926 /* It may have the ending quote right after the file name */
927 if (copy[p - *argptr - 2] == '"')
928 copy[p - *argptr - 2] = 0;
930 copy[p - *argptr - 1] = 0;
934 memcpy (copy, *argptr, p - *argptr);
935 copy[p - *argptr] = 0;
938 /* Find that file's data. */
939 s = lookup_symtab (copy);
942 if (!have_full_symbols () && !have_partial_symbols ())
943 error ("No symbol table is loaded. Use the \"file\" command.");
944 error ("No source file named %s.", copy);
947 /* Discard the file name from the arg. */
949 while (*p == ' ' || *p == '\t')
954 /* No one really seems to know why this was added. It certainly
955 breaks the command line, though, whenever the passed
956 name is of the form ClassName::Method. This bit of code
957 singles out the class name, and if funfirstline is set (for
958 example, you are setting a breakpoint at this function),
959 you get an error. This did not occur with earlier
960 verions, so I am ifdef'ing this out. 3/29/99 */
963 /* Check if what we have till now is a symbol name */
965 /* We may be looking at a template instantiation such
966 as "foo<int>". Check here whether we know about it,
967 instead of falling through to the code below which
968 handles ordinary function names, because that code
969 doesn't like seeing '<' and '>' in a name -- the
970 skip_quoted call doesn't go past them. So see if we
971 can figure it out right now. */
973 copy = (char *) alloca (p - *argptr + 1);
974 memcpy (copy, *argptr, p - *argptr);
975 copy[p - *argptr] = '\000';
976 sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab);
979 /* Yes, we have a symbol; jump to symbol processing */
980 /* Code after symbol_found expects S, SYM_SYMTAB, SYM,
981 and COPY to be set correctly */
982 *argptr = (*p == '\'') ? p + 1 : p;
983 s = (struct symtab *) 0;
986 /* Otherwise fall out from here and go to file/line spec
991 /* S is specified file's symtab, or 0 if no file specified.
992 arg no longer contains the file name. */
994 /* Check whether arg is all digits (and sign) */
997 if (*q == '-' || *q == '+')
999 while (*q >= '0' && *q <= '9')
1002 if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ','))
1004 /* We found a token consisting of all digits -- at least one digit. */
1011 /* We might need a canonical line spec if no file was specified. */
1012 int need_canonical = (s == 0) ? 1 : 0;
1014 /* This is where we need to make sure that we have good defaults.
1015 We must guarantee that this section of code is never executed
1016 when we are called with just a function name, since
1017 select_source_symtab calls us with such an argument */
1019 if (s == 0 && default_symtab == 0)
1021 select_source_symtab (0);
1022 default_symtab = current_source_symtab;
1023 default_line = current_source_line;
1026 if (**argptr == '+')
1027 sign = plus, (*argptr)++;
1028 else if (**argptr == '-')
1029 sign = minus, (*argptr)++;
1030 val.line = atoi (*argptr);
1037 val.line = default_line + val.line;
1043 val.line = default_line - val.line;
1048 break; /* No need to adjust val.line. */
1051 while (*q == ' ' || *q == '\t')
1057 /* It is possible that this source file has more than one symtab,
1058 and that the new line number specification has moved us from the
1059 default (in s) to a new one. */
1060 val.symtab = find_line_symtab (s, val.line, NULL, NULL);
1061 if (val.symtab == 0)
1065 values.sals = (struct symtab_and_line *)
1066 xmalloc (sizeof (struct symtab_and_line));
1067 values.sals[0] = val;
1070 build_canonical_line_spec (values.sals, NULL, canonical);
1074 /* Arg token is not digits => try it as a variable name
1075 Find the next token (everything up to end or next whitespace). */
1077 if (**argptr == '$') /* May be a convenience variable */
1078 p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1)); /* One or two $ chars possible */
1081 p = skip_quoted (*argptr);
1083 error ("Unmatched single quote.");
1085 else if (has_parens)
1091 p = skip_quoted (*argptr);
1094 if (is_quote_enclosed && **argptr == '"')
1097 copy = (char *) alloca (p - *argptr + 1);
1098 memcpy (copy, *argptr, p - *argptr);
1099 copy[p - *argptr] = '\0';
1102 && copy[0] == copy[p - *argptr - 1]
1103 && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL)
1105 copy[p - *argptr - 1] = '\0';
1108 while (*p == ' ' || *p == '\t')
1112 /* If it starts with $: may be a legitimate variable or routine name
1113 (e.g. HP-UX millicode routines such as $$dyncall), or it may
1114 be history value, or it may be a convenience variable */
1120 int need_canonical = 0;
1122 p = (copy[1] == '$') ? copy + 2 : copy + 1;
1123 while (*p >= '0' && *p <= '9')
1125 if (!*p) /* reached end of token without hitting non-digit */
1127 /* We have a value history reference */
1128 sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index);
1129 valx = access_value_history ((copy[1] == '$') ? -index : index);
1130 if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT)
1131 error ("History values used in line specs must have integer values.");
1135 /* Not all digits -- may be user variable/function or a
1136 convenience variable */
1138 /* Look up entire name as a symbol first */
1139 sym = lookup_symbol (copy, 0, VAR_NAMESPACE, 0, &sym_symtab);
1140 s = (struct symtab *) 0;
1142 /* Symbol was found --> jump to normal symbol processing.
1143 Code following "symbol_found" expects "copy" to have the
1144 symbol name, "sym" to have the symbol pointer, "s" to be
1145 a specified file's symtab, and sym_symtab to be the symbol's
1150 /* If symbol was not found, look in minimal symbol tables */
1151 msymbol = lookup_minimal_symbol (copy, 0, 0);
1152 /* Min symbol was found --> jump to minsym processing. */
1154 goto minimal_symbol_found;
1156 /* Not a user variable or function -- must be convenience variable */
1157 need_canonical = (s == 0) ? 1 : 0;
1158 valx = value_of_internalvar (lookup_internalvar (copy + 1));
1159 if (TYPE_CODE (VALUE_TYPE (valx)) != TYPE_CODE_INT)
1160 error ("Convenience variables used in line specs must have integer values.");
1163 /* Either history value or convenience value from above, in valx */
1164 val.symtab = s ? s : default_symtab;
1165 val.line = value_as_long (valx);
1168 values.sals = (struct symtab_and_line *) xmalloc (sizeof val);
1169 values.sals[0] = val;
1173 build_canonical_line_spec (values.sals, NULL, canonical);
1179 /* Look up that token as a variable.
1180 If file specified, use that file's per-file block to start with. */
1182 sym = lookup_symbol (copy,
1183 (s ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK)
1184 : get_selected_block ()),
1185 VAR_NAMESPACE, 0, &sym_symtab);
1187 symbol_found: /* We also jump here from inside the C++ class/namespace
1188 code on finding a symbol of the form "A::B::C" */
1192 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
1194 /* Arg is the name of a function */
1195 values.sals = (struct symtab_and_line *)
1196 xmalloc (sizeof (struct symtab_and_line));
1197 values.sals[0] = find_function_start_sal (sym, funfirstline);
1200 /* Don't use the SYMBOL_LINE; if used at all it points to
1201 the line containing the parameters or thereabouts, not
1202 the first line of code. */
1204 /* We might need a canonical line spec if it is a static
1208 struct blockvector *bv = BLOCKVECTOR (sym_symtab);
1209 struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1210 if (lookup_block_symbol (b, copy, VAR_NAMESPACE) != NULL)
1211 build_canonical_line_spec (values.sals, copy, canonical);
1218 error ("\"%s\" is not a function", copy);
1219 else if (SYMBOL_LINE (sym) != 0)
1221 /* We know its line number. */
1222 values.sals = (struct symtab_and_line *)
1223 xmalloc (sizeof (struct symtab_and_line));
1225 memset (&values.sals[0], 0, sizeof (values.sals[0]));
1226 values.sals[0].symtab = sym_symtab;
1227 values.sals[0].line = SYMBOL_LINE (sym);
1231 /* This can happen if it is compiled with a compiler which doesn't
1232 put out line numbers for variables. */
1233 /* FIXME: Shouldn't we just set .line and .symtab to zero
1234 and return? For example, "info line foo" could print
1236 error ("Line number not known for symbol \"%s\"", copy);
1240 msymbol = lookup_minimal_symbol (copy, NULL, NULL);
1242 minimal_symbol_found: /* We also jump here from the case for variables
1243 that begin with '$' */
1245 if (msymbol != NULL)
1247 values.sals = (struct symtab_and_line *)
1248 xmalloc (sizeof (struct symtab_and_line));
1249 values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol),
1250 (struct sec *) 0, 0);
1251 values.sals[0].section = SYMBOL_BFD_SECTION (msymbol);
1254 values.sals[0].pc += FUNCTION_START_OFFSET;
1255 values.sals[0].pc = SKIP_PROLOGUE (values.sals[0].pc);
1261 if (!have_full_symbols () &&
1262 !have_partial_symbols () && !have_minimal_symbols ())
1263 error ("No symbol table is loaded. Use the \"file\" command.");
1265 error ("Function \"%s\" not defined.", copy);
1266 return values; /* for lint */