| /* Parser for linespec for the GNU debugger, GDB. |
| |
| Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "symtab.h" |
| #include "frame.h" |
| #include "command.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "source.h" |
| #include "demangle.h" |
| #include "value.h" |
| #include "completer.h" |
| #include "cp-abi.h" |
| #include "parser-defs.h" |
| #include "block.h" |
| #include "objc-lang.h" |
| #include "linespec.h" |
| #include "exceptions.h" |
| |
| /* We share this one with symtab.c, but it is not exported widely. */ |
| |
| extern char *operator_chars (char *, char **); |
| |
| /* Prototypes for local functions */ |
| |
| static void initialize_defaults (struct symtab **default_symtab, |
| int *default_line); |
| |
| static void set_flags (char *arg, int *is_quoted, char **paren_pointer); |
| |
| static struct symtabs_and_lines decode_indirect (char **argptr); |
| |
| static char *locate_first_half (char **argptr, int *is_quote_enclosed); |
| |
| static struct symtabs_and_lines decode_objc (char **argptr, |
| int funfirstline, |
| struct symtab *file_symtab, |
| char ***canonical, |
| char *saved_arg); |
| |
| static struct symtabs_and_lines decode_compound (char **argptr, |
| int funfirstline, |
| char ***canonical, |
| char *saved_arg, |
| char *p); |
| |
| static struct symbol *lookup_prefix_sym (char **argptr, char *p); |
| |
| static struct symtabs_and_lines find_method (int funfirstline, |
| char ***canonical, |
| char *saved_arg, |
| char *copy, |
| struct type *t, |
| struct symbol *sym_class); |
| |
| static int collect_methods (char *copy, struct type *t, |
| struct symbol **sym_arr); |
| |
| static NORETURN void cplusplus_error (const char *name, |
| const char *fmt, ...) |
| ATTR_NORETURN ATTR_FORMAT (printf, 2, 3); |
| |
| static int total_number_of_methods (struct type *type); |
| |
| static int find_methods (struct type *, char *, struct symbol **); |
| |
| static int add_matching_methods (int method_counter, struct type *t, |
| struct symbol **sym_arr); |
| |
| static int add_constructors (int method_counter, struct type *t, |
| struct symbol **sym_arr); |
| |
| static void build_canonical_line_spec (struct symtab_and_line *, |
| char *, char ***); |
| |
| static char *find_toplevel_char (char *s, char c); |
| |
| static int is_objc_method_format (const char *s); |
| |
| static struct symtabs_and_lines decode_line_2 (struct symbol *[], |
| int, int, char ***); |
| |
| static struct symtab *symtab_from_filename (char **argptr, |
| char *p, int is_quote_enclosed, |
| int *not_found_ptr); |
| |
| static struct |
| symtabs_and_lines decode_all_digits (char **argptr, |
| struct symtab *default_symtab, |
| int default_line, |
| char ***canonical, |
| struct symtab *file_symtab, |
| char *q); |
| |
| static struct symtabs_and_lines decode_dollar (char *copy, |
| int funfirstline, |
| struct symtab *default_symtab, |
| char ***canonical, |
| struct symtab *file_symtab); |
| |
| static struct symtabs_and_lines decode_variable (char *copy, |
| int funfirstline, |
| char ***canonical, |
| struct symtab *file_symtab, |
| int *not_found_ptr); |
| |
| static struct |
| symtabs_and_lines symbol_found (int funfirstline, |
| char ***canonical, |
| char *copy, |
| struct symbol *sym, |
| struct symtab *file_symtab, |
| struct symtab *sym_symtab); |
| |
| static struct |
| symtabs_and_lines minsym_found (int funfirstline, |
| struct minimal_symbol *msymbol); |
| |
| /* Helper functions. */ |
| |
| /* Issue a helpful hint on using the command completion feature on |
| single quoted demangled C++ symbols as part of the completion |
| error. */ |
| |
| static NORETURN void |
| cplusplus_error (const char *name, const char *fmt, ...) |
| { |
| struct ui_file *tmp_stream; |
| tmp_stream = mem_fileopen (); |
| make_cleanup_ui_file_delete (tmp_stream); |
| |
| { |
| va_list args; |
| va_start (args, fmt); |
| vfprintf_unfiltered (tmp_stream, fmt, args); |
| va_end (args); |
| } |
| |
| while (*name == '\'') |
| name++; |
| fprintf_unfiltered (tmp_stream, |
| ("Hint: try '%s<TAB> or '%s<ESC-?>\n" |
| "(Note leading single quote.)"), |
| name, name); |
| error_stream (tmp_stream); |
| } |
| |
| /* Return the number of methods described for TYPE, including the |
| methods from types it derives from. This can't be done in the symbol |
| reader because the type of the baseclass might still be stubbed |
| when the definition of the derived class is parsed. */ |
| |
| static int |
| total_number_of_methods (struct type *type) |
| { |
| int n; |
| int count; |
| |
| CHECK_TYPEDEF (type); |
| if (TYPE_CPLUS_SPECIFIC (type) == NULL) |
| return 0; |
| count = TYPE_NFN_FIELDS_TOTAL (type); |
| |
| for (n = 0; n < TYPE_N_BASECLASSES (type); n++) |
| count += total_number_of_methods (TYPE_BASECLASS (type, n)); |
| |
| return count; |
| } |
| |
| /* Recursive helper function for decode_line_1. |
| Look for methods named NAME in type T. |
| Return number of matches. |
| Put matches in SYM_ARR, which should have been allocated with |
| a size of total_number_of_methods (T) * sizeof (struct symbol *). |
| Note that this function is g++ specific. */ |
| |
| static int |
| find_methods (struct type *t, char *name, struct symbol **sym_arr) |
| { |
| int i1 = 0; |
| int ibase; |
| char *class_name = type_name_no_tag (t); |
| |
| /* Ignore this class if it doesn't have a name. This is ugly, but |
| unless we figure out how to get the physname without the name of |
| the class, then the loop can't do any good. */ |
| if (class_name |
| && (lookup_symbol (class_name, (struct block *) NULL, |
| STRUCT_DOMAIN, (int *) NULL, |
| (struct symtab **) NULL))) |
| { |
| int method_counter; |
| int name_len = strlen (name); |
| |
| CHECK_TYPEDEF (t); |
| |
| /* Loop over each method name. At this level, all overloads of a name |
| are counted as a single name. There is an inner loop which loops over |
| each overload. */ |
| |
| for (method_counter = TYPE_NFN_FIELDS (t) - 1; |
| method_counter >= 0; |
| --method_counter) |
| { |
| char *method_name = TYPE_FN_FIELDLIST_NAME (t, method_counter); |
| char dem_opname[64]; |
| |
| if (strncmp (method_name, "__", 2) == 0 || |
| strncmp (method_name, "op", 2) == 0 || |
| strncmp (method_name, "type", 4) == 0) |
| { |
| if (cplus_demangle_opname (method_name, dem_opname, DMGL_ANSI)) |
| method_name = dem_opname; |
| else if (cplus_demangle_opname (method_name, dem_opname, 0)) |
| method_name = dem_opname; |
| } |
| |
| if (strcmp_iw (name, method_name) == 0) |
| /* Find all the overloaded methods with that name. */ |
| i1 += add_matching_methods (method_counter, t, |
| sym_arr + i1); |
| else if (strncmp (class_name, name, name_len) == 0 |
| && (class_name[name_len] == '\0' |
| || class_name[name_len] == '<')) |
| i1 += add_constructors (method_counter, t, |
| sym_arr + i1); |
| } |
| } |
| |
| /* Only search baseclasses if there is no match yet, since names in |
| derived classes override those in baseclasses. |
| |
| FIXME: The above is not true; it is only true of member functions |
| if they have the same number of arguments (??? - section 13.1 of the |
| ARM says the function members are not in the same scope but doesn't |
| really spell out the rules in a way I understand. In any case, if |
| the number of arguments differ this is a case in which we can overload |
| rather than hiding without any problem, and gcc 2.4.5 does overload |
| rather than hiding in this case). */ |
| |
| if (i1 == 0) |
| for (ibase = 0; ibase < TYPE_N_BASECLASSES (t); ibase++) |
| i1 += find_methods (TYPE_BASECLASS (t, ibase), name, sym_arr + i1); |
| |
| return i1; |
| } |
| |
| /* Add the symbols associated to methods of the class whose type is T |
| and whose name matches the method indexed by METHOD_COUNTER in the |
| array SYM_ARR. Return the number of methods added. */ |
| |
| static int |
| add_matching_methods (int method_counter, struct type *t, |
| struct symbol **sym_arr) |
| { |
| int field_counter; |
| int i1 = 0; |
| |
| for (field_counter = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| field_counter >= 0; |
| --field_counter) |
| { |
| struct fn_field *f; |
| char *phys_name; |
| |
| f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| |
| if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| { |
| char *tmp_name; |
| |
| tmp_name = gdb_mangle_name (t, |
| method_counter, |
| field_counter); |
| phys_name = alloca (strlen (tmp_name) + 1); |
| strcpy (phys_name, tmp_name); |
| xfree (tmp_name); |
| } |
| else |
| phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| |
| /* Destructor is handled by caller, don't add it to |
| the list. */ |
| if (is_destructor_name (phys_name) != 0) |
| continue; |
| |
| sym_arr[i1] = lookup_symbol (phys_name, |
| NULL, VAR_DOMAIN, |
| (int *) NULL, |
| (struct symtab **) NULL); |
| if (sym_arr[i1]) |
| i1++; |
| else |
| { |
| /* This error message gets printed, but the method |
| still seems to be found |
| fputs_filtered("(Cannot find method ", gdb_stdout); |
| fprintf_symbol_filtered (gdb_stdout, phys_name, |
| language_cplus, |
| DMGL_PARAMS | DMGL_ANSI); |
| fputs_filtered(" - possibly inlined.)\n", gdb_stdout); |
| */ |
| } |
| } |
| |
| return i1; |
| } |
| |
| /* Add the symbols associated to constructors of the class whose type |
| is CLASS_TYPE and which are indexed by by METHOD_COUNTER to the |
| array SYM_ARR. Return the number of methods added. */ |
| |
| static int |
| add_constructors (int method_counter, struct type *t, |
| struct symbol **sym_arr) |
| { |
| int field_counter; |
| int i1 = 0; |
| |
| /* For GCC 3.x and stabs, constructors and destructors |
| have names like __base_ctor and __complete_dtor. |
| Check the physname for now if we're looking for a |
| constructor. */ |
| for (field_counter |
| = TYPE_FN_FIELDLIST_LENGTH (t, method_counter) - 1; |
| field_counter >= 0; |
| --field_counter) |
| { |
| struct fn_field *f; |
| char *phys_name; |
| |
| f = TYPE_FN_FIELDLIST1 (t, method_counter); |
| |
| /* GCC 3.x will never produce stabs stub methods, so |
| we don't need to handle this case. */ |
| if (TYPE_FN_FIELD_STUB (f, field_counter)) |
| continue; |
| phys_name = TYPE_FN_FIELD_PHYSNAME (f, field_counter); |
| if (! is_constructor_name (phys_name)) |
| continue; |
| |
| /* If this method is actually defined, include it in the |
| list. */ |
| sym_arr[i1] = lookup_symbol (phys_name, |
| NULL, VAR_DOMAIN, |
| (int *) NULL, |
| (struct symtab **) NULL); |
| if (sym_arr[i1]) |
| i1++; |
| } |
| |
| return i1; |
| } |
| |
| /* Helper function for decode_line_1. |
| Build a canonical line spec in CANONICAL if it is non-NULL and if |
| the SAL has a symtab. |
| If SYMNAME is non-NULL the canonical line spec is `filename:symname'. |
| If SYMNAME is NULL the line number from SAL is used and the canonical |
| line spec is `filename:linenum'. */ |
| |
| static void |
| build_canonical_line_spec (struct symtab_and_line *sal, char *symname, |
| char ***canonical) |
| { |
| char **canonical_arr; |
| char *canonical_name; |
| char *filename; |
| struct symtab *s = sal->symtab; |
| |
| if (s == (struct symtab *) NULL |
| || s->filename == (char *) NULL |
| || canonical == (char ***) NULL) |
| return; |
| |
| canonical_arr = (char **) xmalloc (sizeof (char *)); |
| *canonical = canonical_arr; |
| |
| filename = s->filename; |
| if (symname != NULL) |
| { |
| canonical_name = xmalloc (strlen (filename) + strlen (symname) + 2); |
| sprintf (canonical_name, "%s:%s", filename, symname); |
| } |
| else |
| { |
| canonical_name = xmalloc (strlen (filename) + 30); |
| sprintf (canonical_name, "%s:%d", filename, sal->line); |
| } |
| canonical_arr[0] = canonical_name; |
| } |
| |
| |
| |
| /* Find an instance of the character C in the string S that is outside |
| of all parenthesis pairs, single-quoted strings, and double-quoted |
| strings. Also, ignore the char within a template name, like a ',' |
| within foo<int, int>. */ |
| |
| static char * |
| find_toplevel_char (char *s, char c) |
| { |
| int quoted = 0; /* zero if we're not in quotes; |
| '"' if we're in a double-quoted string; |
| '\'' if we're in a single-quoted string. */ |
| int depth = 0; /* Number of unclosed parens we've seen. */ |
| char *scan; |
| |
| for (scan = s; *scan; scan++) |
| { |
| if (quoted) |
| { |
| if (*scan == quoted) |
| quoted = 0; |
| else if (*scan == '\\' && *(scan + 1)) |
| scan++; |
| } |
| else if (*scan == c && ! quoted && depth == 0) |
| return scan; |
| else if (*scan == '"' || *scan == '\'') |
| quoted = *scan; |
| else if (*scan == '(' || *scan == '<') |
| depth++; |
| else if ((*scan == ')' || *scan == '>') && depth > 0) |
| depth--; |
| } |
| |
| return 0; |
| } |
| |
| /* Determines if the gives string corresponds to an Objective-C method |
| representation, such as -[Foo bar:] or +[Foo bar]. Objective-C symbols |
| are allowed to have spaces and parentheses in them. */ |
| |
| static int |
| is_objc_method_format (const char *s) |
| { |
| if (s == NULL || *s == '\0') |
| return 0; |
| /* Handle arguments with the format FILENAME:SYMBOL. */ |
| if ((s[0] == ':') && (strchr ("+-", s[1]) != NULL) |
| && (s[2] == '[') && strchr(s, ']')) |
| return 1; |
| /* Handle arguments that are just SYMBOL. */ |
| else if ((strchr ("+-", s[0]) != NULL) && (s[1] == '[') && strchr(s, ']')) |
| return 1; |
| return 0; |
| } |
| |
| /* Given a list of NELTS symbols in SYM_ARR, return a list of lines to |
| operate on (ask user if necessary). |
| If CANONICAL is non-NULL return a corresponding array of mangled names |
| as canonical line specs there. */ |
| |
| static struct symtabs_and_lines |
| decode_line_2 (struct symbol *sym_arr[], int nelts, int funfirstline, |
| char ***canonical) |
| { |
| struct symtabs_and_lines values, return_values; |
| char *args, *arg1; |
| int i; |
| char *prompt; |
| char *symname; |
| struct cleanup *old_chain; |
| char **canonical_arr = (char **) NULL; |
| |
| values.sals = (struct symtab_and_line *) |
| alloca (nelts * sizeof (struct symtab_and_line)); |
| return_values.sals = (struct symtab_and_line *) |
| xmalloc (nelts * sizeof (struct symtab_and_line)); |
| old_chain = make_cleanup (xfree, return_values.sals); |
| |
| if (canonical) |
| { |
| canonical_arr = (char **) xmalloc (nelts * sizeof (char *)); |
| make_cleanup (xfree, canonical_arr); |
| memset (canonical_arr, 0, nelts * sizeof (char *)); |
| *canonical = canonical_arr; |
| } |
| |
| i = 0; |
| printf_unfiltered (_("[0] cancel\n[1] all\n")); |
| while (i < nelts) |
| { |
| init_sal (&return_values.sals[i]); /* Initialize to zeroes. */ |
| init_sal (&values.sals[i]); |
| if (sym_arr[i] && SYMBOL_CLASS (sym_arr[i]) == LOC_BLOCK) |
| { |
| values.sals[i] = find_function_start_sal (sym_arr[i], funfirstline); |
| if (values.sals[i].symtab) |
| printf_unfiltered ("[%d] %s at %s:%d\n", |
| (i + 2), |
| SYMBOL_PRINT_NAME (sym_arr[i]), |
| values.sals[i].symtab->filename, |
| values.sals[i].line); |
| else |
| printf_unfiltered (_("[%d] %s at ?FILE:%d [No symtab? Probably broken debug info...]\n"), |
| (i + 2), |
| SYMBOL_PRINT_NAME (sym_arr[i]), |
| values.sals[i].line); |
| |
| } |
| else |
| printf_unfiltered (_("?HERE\n")); |
| i++; |
| } |
| |
| prompt = getenv ("PS2"); |
| if (prompt == NULL) |
| { |
| prompt = "> "; |
| } |
| args = command_line_input (prompt, 0, "overload-choice"); |
| |
| if (args == 0 || *args == 0) |
| error_no_arg (_("one or more choice numbers")); |
| |
| i = 0; |
| while (*args) |
| { |
| int num; |
| |
| arg1 = args; |
| while (*arg1 >= '0' && *arg1 <= '9') |
| arg1++; |
| if (*arg1 && *arg1 != ' ' && *arg1 != '\t') |
| error (_("Arguments must be choice numbers.")); |
| |
| num = atoi (args); |
| |
| if (num == 0) |
| error (_("canceled")); |
| else if (num == 1) |
| { |
| if (canonical_arr) |
| { |
| for (i = 0; i < nelts; i++) |
| { |
| if (canonical_arr[i] == NULL) |
| { |
| symname = DEPRECATED_SYMBOL_NAME (sym_arr[i]); |
| canonical_arr[i] = savestring (symname, strlen (symname)); |
| } |
| } |
| } |
| memcpy (return_values.sals, values.sals, |
| (nelts * sizeof (struct symtab_and_line))); |
| return_values.nelts = nelts; |
| discard_cleanups (old_chain); |
| return return_values; |
| } |
| |
| if (num >= nelts + 2) |
| { |
| printf_unfiltered (_("No choice number %d.\n"), num); |
| } |
| else |
| { |
| num -= 2; |
| if (values.sals[num].pc) |
| { |
| if (canonical_arr) |
| { |
| symname = DEPRECATED_SYMBOL_NAME (sym_arr[num]); |
| make_cleanup (xfree, symname); |
| canonical_arr[i] = savestring (symname, strlen (symname)); |
| } |
| return_values.sals[i++] = values.sals[num]; |
| values.sals[num].pc = 0; |
| } |
| else |
| { |
| printf_unfiltered (_("duplicate request for %d ignored.\n"), num); |
| } |
| } |
| |
| args = arg1; |
| while (*args == ' ' || *args == '\t') |
| args++; |
| } |
| return_values.nelts = i; |
| discard_cleanups (old_chain); |
| return return_values; |
| } |
| |
| /* The parser of linespec itself. */ |
| |
| /* Parse a string that specifies a line number. |
| Pass the address of a char * variable; that variable will be |
| advanced over the characters actually parsed. |
| |
| The string can be: |
| |
| LINENUM -- that line number in current file. PC returned is 0. |
| FILE:LINENUM -- that line in that file. PC returned is 0. |
| FUNCTION -- line number of openbrace of that function. |
| PC returned is the start of the function. |
| VARIABLE -- line number of definition of that variable. |
| PC returned is 0. |
| FILE:FUNCTION -- likewise, but prefer functions in that file. |
| *EXPR -- line in which address EXPR appears. |
| |
| This may all be followed by an "if EXPR", which we ignore. |
| |
| FUNCTION may be an undebuggable function found in minimal symbol table. |
| |
| If the argument FUNFIRSTLINE is nonzero, we want the first line |
| of real code inside a function when a function is specified, and it is |
| not OK to specify a variable or type to get its line number. |
| |
| DEFAULT_SYMTAB specifies the file to use if none is specified. |
| It defaults to current_source_symtab. |
| DEFAULT_LINE specifies the line number to use for relative |
| line numbers (that start with signs). Defaults to current_source_line. |
| If CANONICAL is non-NULL, store an array of strings containing the canonical |
| line specs there if necessary. Currently overloaded member functions and |
| line numbers or static functions without a filename yield a canonical |
| line spec. The array and the line spec strings are allocated on the heap, |
| it is the callers responsibility to free them. |
| |
| Note that it is possible to return zero for the symtab |
| if no file is validly specified. Callers must check that. |
| Also, the line number returned may be invalid. |
| |
| If NOT_FOUND_PTR is not null, store a boolean true/false value at the location, based |
| on whether or not failure occurs due to an unknown function or file. In the case |
| where failure does occur due to an unknown function or file, do not issue an error |
| message. */ |
| |
| /* We allow single quotes in various places. This is a hideous |
| kludge, which exists because the completer can't yet deal with the |
| lack of single quotes. FIXME: write a linespec_completer which we |
| can use as appropriate instead of make_symbol_completion_list. */ |
| |
| struct symtabs_and_lines |
| decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, |
| int default_line, char ***canonical, int *not_found_ptr) |
| { |
| char *p; |
| char *q; |
| /* If a file name is specified, this is its symtab. */ |
| struct symtab *file_symtab = NULL; |
| |
| char *copy; |
| /* This is NULL if there are no parens in *ARGPTR, or a pointer to |
| the closing parenthesis if there are parens. */ |
| char *paren_pointer; |
| /* This says whether or not something in *ARGPTR is quoted with |
| completer_quotes (i.e. with single quotes). */ |
| int is_quoted; |
| /* Is part of *ARGPTR is enclosed in double quotes? */ |
| int is_quote_enclosed; |
| int is_objc_method = 0; |
| char *saved_arg = *argptr; |
| |
| if (not_found_ptr) |
| *not_found_ptr = 0; |
| |
| /* Defaults have defaults. */ |
| |
| initialize_defaults (&default_symtab, &default_line); |
| |
| /* See if arg is *PC. */ |
| |
| if (**argptr == '*') |
| return decode_indirect (argptr); |
| |
| /* Set various flags. 'paren_pointer' is important for overload |
| checking, where we allow things like: |
| (gdb) break c::f(int) |
| */ |
| |
| set_flags (*argptr, &is_quoted, &paren_pointer); |
| |
| /* Check to see if it's a multipart linespec (with colons or |
| periods). */ |
| |
| /* Locate the end of the first half of the linespec. |
| After the call, for instance, if the argptr string is "foo.c:123" |
| p will point at "123". If there is only one part, like "foo", p |
| will point to "". If this is a C++ name, like "A::B::foo", p will |
| point to "::B::foo". Argptr is not changed by this call. */ |
| |
| p = locate_first_half (argptr, &is_quote_enclosed); |
| |
| /* Check if this is an Objective-C method (anything that starts with |
| a '+' or '-' and a '['). */ |
| if (is_objc_method_format (p)) |
| { |
| is_objc_method = 1; |
| paren_pointer = NULL; /* Just a category name. Ignore it. */ |
| } |
| |
| /* Check if the symbol could be an Objective-C selector. */ |
| |
| { |
| struct symtabs_and_lines values; |
| values = decode_objc (argptr, funfirstline, NULL, |
| canonical, saved_arg); |
| if (values.sals != NULL) |
| return values; |
| } |
| |
| /* Does it look like there actually were two parts? */ |
| |
| if ((p[0] == ':' || p[0] == '.') && paren_pointer == NULL) |
| { |
| if (is_quoted) |
| *argptr = *argptr + 1; |
| |
| /* Is it a C++ or Java compound data structure? |
| The check on p[1] == ':' is capturing the case of "::", |
| since p[0]==':' was checked above. |
| Note that the call to decode_compound does everything |
| for us, including the lookup on the symbol table, so we |
| can return now. */ |
| |
| if (p[0] == '.' || p[1] == ':') |
| return decode_compound (argptr, funfirstline, canonical, |
| saved_arg, p); |
| |
| /* No, the first part is a filename; set s to be that file's |
| symtab. Also, move argptr past the filename. */ |
| |
| file_symtab = symtab_from_filename (argptr, p, is_quote_enclosed, |
| not_found_ptr); |
| } |
| #if 0 |
| /* No one really seems to know why this was added. It certainly |
| breaks the command line, though, whenever the passed |
| name is of the form ClassName::Method. This bit of code |
| singles out the class name, and if funfirstline is set (for |
| example, you are setting a breakpoint at this function), |
| you get an error. This did not occur with earlier |
| verions, so I am ifdef'ing this out. 3/29/99 */ |
| else |
| { |
| /* Check if what we have till now is a symbol name */ |
| |
| /* We may be looking at a template instantiation such |
| as "foo<int>". Check here whether we know about it, |
| instead of falling through to the code below which |
| handles ordinary function names, because that code |
| doesn't like seeing '<' and '>' in a name -- the |
| skip_quoted call doesn't go past them. So see if we |
| can figure it out right now. */ |
| |
| copy = (char *) alloca (p - *argptr + 1); |
| memcpy (copy, *argptr, p - *argptr); |
| copy[p - *argptr] = '\000'; |
| sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0, &sym_symtab); |
| if (sym) |
| { |
| *argptr = (*p == '\'') ? p + 1 : p; |
| return symbol_found (funfirstline, canonical, copy, sym, |
| NULL, sym_symtab); |
| } |
| /* Otherwise fall out from here and go to file/line spec |
| processing, etc. */ |
| } |
| #endif |
| |
| /* S is specified file's symtab, or 0 if no file specified. |
| arg no longer contains the file name. */ |
| |
| /* Check whether arg is all digits (and sign). */ |
| |
| q = *argptr; |
| if (*q == '-' || *q == '+') |
| q++; |
| while (*q >= '0' && *q <= '9') |
| q++; |
| |
| if (q != *argptr && (*q == 0 || *q == ' ' || *q == '\t' || *q == ',')) |
| /* We found a token consisting of all digits -- at least one digit. */ |
| return decode_all_digits (argptr, default_symtab, default_line, |
| canonical, file_symtab, q); |
| |
| /* Arg token is not digits => try it as a variable name |
| Find the next token (everything up to end or next whitespace). */ |
| |
| if (**argptr == '$') /* May be a convenience variable. */ |
| /* One or two $ chars possible. */ |
| p = skip_quoted (*argptr + (((*argptr)[1] == '$') ? 2 : 1)); |
| else if (is_quoted) |
| { |
| p = skip_quoted (*argptr); |
| if (p[-1] != '\'') |
| error (_("Unmatched single quote.")); |
| } |
| else if (is_objc_method) |
| { |
| /* allow word separators in method names for Obj-C */ |
| p = skip_quoted_chars (*argptr, NULL, ""); |
| } |
| else if (paren_pointer != NULL) |
| { |
| p = paren_pointer + 1; |
| } |
| else |
| { |
| p = skip_quoted (*argptr); |
| } |
| |
| copy = (char *) alloca (p - *argptr + 1); |
| memcpy (copy, *argptr, p - *argptr); |
| copy[p - *argptr] = '\0'; |
| if (p != *argptr |
| && copy[0] |
| && copy[0] == copy[p - *argptr - 1] |
| && strchr (get_gdb_completer_quote_characters (), copy[0]) != NULL) |
| { |
| copy[p - *argptr - 1] = '\0'; |
| copy++; |
| } |
| while (*p == ' ' || *p == '\t') |
| p++; |
| *argptr = p; |
| |
| /* If it starts with $: may be a legitimate variable or routine name |
| (e.g. HP-UX millicode routines such as $$dyncall), or it may |
| be history value, or it may be a convenience variable. */ |
| |
| if (*copy == '$') |
| return decode_dollar (copy, funfirstline, default_symtab, |
| canonical, file_symtab); |
| |
| /* Look up that token as a variable. |
| If file specified, use that file's per-file block to start with. */ |
| |
| return decode_variable (copy, funfirstline, canonical, |
| file_symtab, not_found_ptr); |
| } |
| |
| |
| |
| /* Now, more helper functions for decode_line_1. Some conventions |
| that these functions follow: |
| |
| Decode_line_1 typically passes along some of its arguments or local |
| variables to the subfunctions. It passes the variables by |
| reference if they are modified by the subfunction, and by value |
| otherwise. |
| |
| Some of the functions have side effects that don't arise from |
| variables that are passed by reference. In particular, if a |
| function is passed ARGPTR as an argument, it modifies what ARGPTR |
| points to; typically, it advances *ARGPTR past whatever substring |
| it has just looked at. (If it doesn't modify *ARGPTR, then the |
| function gets passed *ARGPTR instead, which is then called ARG: see |
| set_flags, for example.) Also, functions that return a struct |
| symtabs_and_lines may modify CANONICAL, as in the description of |
| decode_line_1. |
| |
| If a function returns a struct symtabs_and_lines, then that struct |
| will immediately make its way up the call chain to be returned by |
| decode_line_1. In particular, all of the functions decode_XXX |
| calculate the appropriate struct symtabs_and_lines, under the |
| assumption that their argument is of the form XXX. */ |
| |
| /* First, some functions to initialize stuff at the beggining of the |
| function. */ |
| |
| static void |
| initialize_defaults (struct symtab **default_symtab, int *default_line) |
| { |
| if (*default_symtab == 0) |
| { |
| /* Use whatever we have for the default source line. We don't use |
| get_current_or_default_symtab_and_line as it can recurse and call |
| us back! */ |
| struct symtab_and_line cursal = |
| get_current_source_symtab_and_line (); |
| |
| *default_symtab = cursal.symtab; |
| *default_line = cursal.line; |
| } |
| } |
| |
| static void |
| set_flags (char *arg, int *is_quoted, char **paren_pointer) |
| { |
| char *ii; |
| int has_if = 0; |
| |
| /* 'has_if' is for the syntax: |
| (gdb) break foo if (a==b) |
| */ |
| if ((ii = strstr (arg, " if ")) != NULL || |
| (ii = strstr (arg, "\tif ")) != NULL || |
| (ii = strstr (arg, " if\t")) != NULL || |
| (ii = strstr (arg, "\tif\t")) != NULL || |
| (ii = strstr (arg, " if(")) != NULL || |
| (ii = strstr (arg, "\tif( ")) != NULL) |
| has_if = 1; |
| /* Temporarily zap out "if (condition)" to not confuse the |
| parenthesis-checking code below. This is undone below. Do not |
| change ii!! */ |
| if (has_if) |
| { |
| *ii = '\0'; |
| } |
| |
| *is_quoted = (*arg |
| && strchr (get_gdb_completer_quote_characters (), |
| *arg) != NULL); |
| |
| *paren_pointer = strchr (arg, '('); |
| if (*paren_pointer != NULL) |
| *paren_pointer = strrchr (*paren_pointer, ')'); |
| |
| /* Now that we're safely past the paren_pointer check, put back " if |
| (condition)" so outer layers can see it. */ |
| if (has_if) |
| *ii = ' '; |
| } |
| |
| |
| |
| /* Decode arg of the form *PC. */ |
| |
| static struct symtabs_and_lines |
| decode_indirect (char **argptr) |
| { |
| struct symtabs_and_lines values; |
| CORE_ADDR pc; |
| |
| (*argptr)++; |
| pc = parse_and_eval_address_1 (argptr); |
| |
| values.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| |
| values.nelts = 1; |
| values.sals[0] = find_pc_line (pc, 0); |
| values.sals[0].pc = pc; |
| values.sals[0].section = find_pc_overlay (pc); |
| |
| return values; |
| } |
| |
| |
| |
| /* Locate the first half of the linespec, ending in a colon, period, |
| or whitespace. (More or less.) Also, check to see if *ARGPTR is |
| enclosed in double quotes; if so, set is_quote_enclosed, advance |
| ARGPTR past that and zero out the trailing double quote. |
| If ARGPTR is just a simple name like "main", p will point to "" |
| at the end. */ |
| |
| static char * |
| locate_first_half (char **argptr, int *is_quote_enclosed) |
| { |
| char *ii; |
| char *p, *p1; |
| int has_comma; |
| |
| /* Maybe we were called with a line range FILENAME:LINENUM,FILENAME:LINENUM |
| and we must isolate the first half. Outer layers will call again later |
| for the second half. |
| |
| Don't count commas that appear in argument lists of overloaded |
| functions, or in quoted strings. It's stupid to go to this much |
| trouble when the rest of the function is such an obvious roach hotel. */ |
| ii = find_toplevel_char (*argptr, ','); |
| has_comma = (ii != 0); |
| |
| /* Temporarily zap out second half to not confuse the code below. |
| This is undone below. Do not change ii!! */ |
| if (has_comma) |
| { |
| *ii = '\0'; |
| } |
| |
| /* Maybe arg is FILE : LINENUM or FILE : FUNCTION. May also be |
| CLASS::MEMBER, or NAMESPACE::NAME. Look for ':', but ignore |
| inside of <>. */ |
| |
| p = *argptr; |
| if (p[0] == '"') |
| { |
| *is_quote_enclosed = 1; |
| (*argptr)++; |
| p++; |
| } |
| else |
| *is_quote_enclosed = 0; |
| for (; *p; p++) |
| { |
| if (p[0] == '<') |
| { |
| char *temp_end = find_template_name_end (p); |
| if (!temp_end) |
| error (_("malformed template specification in command")); |
| p = temp_end; |
| } |
| /* Check for a colon and a plus or minus and a [ (which |
| indicates an Objective-C method) */ |
| if (is_objc_method_format (p)) |
| { |
| break; |
| } |
| /* Check for the end of the first half of the linespec. End of |
| line, a tab, a double colon or the last single colon, or a |
| space. But if enclosed in double quotes we do not break on |
| enclosed spaces. */ |
| if (!*p |
| || p[0] == '\t' |
| || ((p[0] == ':') |
| && ((p[1] == ':') || (strchr (p + 1, ':') == NULL))) |
| || ((p[0] == ' ') && !*is_quote_enclosed)) |
| break; |
| if (p[0] == '.' && strchr (p, ':') == NULL) |
| { |
| /* Java qualified method. Find the *last* '.', since the |
| others are package qualifiers. */ |
| for (p1 = p; *p1; p1++) |
| { |
| if (*p1 == '.') |
| p = p1; |
| } |
| break; |
| } |
| } |
| while (p[0] == ' ' || p[0] == '\t') |
| p++; |
| |
| /* If the closing double quote was left at the end, remove it. */ |
| if (*is_quote_enclosed) |
| { |
| char *closing_quote = strchr (p - 1, '"'); |
| if (closing_quote && closing_quote[1] == '\0') |
| *closing_quote = '\0'; |
| } |
| |
| /* Now that we've safely parsed the first half, put back ',' so |
| outer layers can see it. */ |
| if (has_comma) |
| *ii = ','; |
| |
| return p; |
| } |
| |
| |
| |
| /* Here's where we recognise an Objective-C Selector. An Objective C |
| selector may be implemented by more than one class, therefore it |
| may represent more than one method/function. This gives us a |
| situation somewhat analogous to C++ overloading. If there's more |
| than one method that could represent the selector, then use some of |
| the existing C++ code to let the user choose one. */ |
| |
| struct symtabs_and_lines |
| decode_objc (char **argptr, int funfirstline, struct symtab *file_symtab, |
| char ***canonical, char *saved_arg) |
| { |
| struct symtabs_and_lines values; |
| struct symbol **sym_arr = NULL; |
| struct symbol *sym = NULL; |
| char *copy = NULL; |
| struct block *block = NULL; |
| int i1 = 0; |
| int i2 = 0; |
| |
| values.sals = NULL; |
| values.nelts = 0; |
| |
| if (file_symtab != NULL) |
| block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), STATIC_BLOCK); |
| else |
| block = get_selected_block (0); |
| |
| copy = find_imps (file_symtab, block, *argptr, NULL, &i1, &i2); |
| |
| if (i1 > 0) |
| { |
| sym_arr = (struct symbol **) alloca ((i1 + 1) * sizeof (struct symbol *)); |
| sym_arr[i1] = 0; |
| |
| copy = find_imps (file_symtab, block, *argptr, sym_arr, &i1, &i2); |
| *argptr = copy; |
| } |
| |
| /* i1 now represents the TOTAL number of matches found. |
| i2 represents how many HIGH-LEVEL (struct symbol) matches, |
| which will come first in the sym_arr array. Any low-level |
| (minimal_symbol) matches will follow those. */ |
| |
| if (i1 == 1) |
| { |
| if (i2 > 0) |
| { |
| /* Already a struct symbol. */ |
| sym = sym_arr[0]; |
| } |
| else |
| { |
| sym = find_pc_function (SYMBOL_VALUE_ADDRESS (sym_arr[0])); |
| if ((sym != NULL) && strcmp (SYMBOL_LINKAGE_NAME (sym_arr[0]), SYMBOL_LINKAGE_NAME (sym)) != 0) |
| { |
| warning (_("debugging symbol \"%s\" does not match selector; ignoring"), SYMBOL_LINKAGE_NAME (sym)); |
| sym = NULL; |
| } |
| } |
| |
| values.sals = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); |
| values.nelts = 1; |
| |
| if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| { |
| /* Canonicalize this, so it remains resolved for dylib loads. */ |
| values.sals[0] = find_function_start_sal (sym, funfirstline); |
| build_canonical_line_spec (values.sals, SYMBOL_NATURAL_NAME (sym), canonical); |
| } |
| else |
| { |
| /* The only match was a non-debuggable symbol. */ |
| values.sals[0].symtab = 0; |
| values.sals[0].line = 0; |
| values.sals[0].end = 0; |
| values.sals[0].pc = SYMBOL_VALUE_ADDRESS (sym_arr[0]); |
| } |
| return values; |
| } |
| |
| if (i1 > 1) |
| { |
| /* More than one match. The user must choose one or more. */ |
| return decode_line_2 (sym_arr, i2, funfirstline, canonical); |
| } |
| |
| return values; |
| } |
| |
| /* This handles C++ and Java compound data structures. P should point |
| at the first component separator, i.e. double-colon or period. As |
| an example, on entrance to this function we could have ARGPTR |
| pointing to "AAA::inA::fun" and P pointing to "::inA::fun". */ |
| |
| static struct symtabs_and_lines |
| decode_compound (char **argptr, int funfirstline, char ***canonical, |
| char *saved_arg, char *p) |
| { |
| struct symtabs_and_lines values; |
| char *p2; |
| char *saved_arg2 = *argptr; |
| char *temp_end; |
| struct symbol *sym; |
| /* The symtab that SYM was found in. */ |
| struct symtab *sym_symtab; |
| char *copy; |
| struct symbol *sym_class; |
| struct symbol **sym_arr; |
| struct type *t; |
| |
| /* First check for "global" namespace specification, of the form |
| "::foo". If found, skip over the colons and jump to normal |
| symbol processing. I.e. the whole line specification starts with |
| "::" (note the condition that *argptr == p). */ |
| if (p[0] == ':' |
| && ((*argptr == p) || (p[-1] == ' ') || (p[-1] == '\t'))) |
| saved_arg2 += 2; |
| |
| /* Given our example "AAA::inA::fun", we have two cases to consider: |
| |
| 1) AAA::inA is the name of a class. In that case, presumably it |
| has a method called "fun"; we then look up that method using |
| find_method. |
| |
| 2) AAA::inA isn't the name of a class. In that case, either the |
| user made a typo or AAA::inA is the name of a namespace. |
| Either way, we just look up AAA::inA::fun with lookup_symbol. |
| |
| Thus, our first task is to find everything before the last set of |
| double-colons and figure out if it's the name of a class. So we |
| first loop through all of the double-colons. */ |
| |
| p2 = p; /* Save for restart. */ |
| |
| /* This is very messy. Following the example above we have now the |
| following pointers: |
| p -> "::inA::fun" |
| argptr -> "AAA::inA::fun |
| saved_arg -> "AAA::inA::fun |
| saved_arg2 -> "AAA::inA::fun |
| p2 -> "::inA::fun". */ |
| |
| /* In the loop below, with these strings, we'll make 2 passes, each |
| is marked in comments.*/ |
| |
| while (1) |
| { |
| /* Move pointer up to next possible class/namespace token. */ |
| |
| p = p2 + 1; /* Restart with old value +1. */ |
| |
| /* PASS1: at this point p2->"::inA::fun", so p->":inA::fun", |
| i.e. if there is a double-colon, p will now point to the |
| second colon. */ |
| /* PASS2: p2->"::fun", p->":fun" */ |
| |
| /* Move pointer ahead to next double-colon. */ |
| while (*p && (p[0] != ' ') && (p[0] != '\t') && (p[0] != '\'')) |
| { |
| if (p[0] == '<') |
| { |
| temp_end = find_template_name_end (p); |
| if (!temp_end) |
| error (_("malformed template specification in command")); |
| p = temp_end; |
| } |
| /* Note that, since, at the start of this loop, p would be |
| pointing to the second colon in a double-colon, we only |
| satisfy the condition below if there is another |
| double-colon to the right (after). I.e. there is another |
| component that can be a class or a namespace. I.e, if at |
| the beginning of this loop (PASS1), we had |
| p->":inA::fun", we'll trigger this when p has been |
| advanced to point to "::fun". */ |
| /* PASS2: we will not trigger this. */ |
| else if ((p[0] == ':') && (p[1] == ':')) |
| break; /* Found double-colon. */ |
| else |
| /* PASS2: We'll keep getting here, until p->"", at which point |
| we exit this loop. */ |
| p++; |
| } |
| |
| if (*p != ':') |
| break; /* Out of the while (1). This would happen |
| for instance if we have looked up |
| unsuccessfully all the components of the |
| string, and p->""(PASS2) */ |
| |
| /* We get here if p points to ' ', '\t', '\'', "::" or ""(i.e |
| string ended). */ |
| /* Save restart for next time around. */ |
| p2 = p; |
| /* Restore argptr as it was on entry to this function. */ |
| *argptr = saved_arg2; |
| /* PASS1: at this point p->"::fun" argptr->"AAA::inA::fun", |
| p2->"::fun". */ |
| |
| /* All ready for next pass through the loop. */ |
| } /* while (1) */ |
| |
| |
| /* Start of lookup in the symbol tables. */ |
| |
| /* Lookup in the symbol table the substring between argptr and |
| p. Note, this call changes the value of argptr. */ |
| /* Before the call, argptr->"AAA::inA::fun", |
| p->"", p2->"::fun". After the call: argptr->"fun", p, p2 |
| unchanged. */ |
| sym_class = lookup_prefix_sym (argptr, p2); |
| |
| /* If sym_class has been found, and if "AAA::inA" is a class, then |
| we're in case 1 above. So we look up "fun" as a method of that |
| class. */ |
| if (sym_class && |
| (t = check_typedef (SYMBOL_TYPE (sym_class)), |
| (TYPE_CODE (t) == TYPE_CODE_STRUCT |
| || TYPE_CODE (t) == TYPE_CODE_UNION))) |
| { |
| /* Arg token is not digits => try it as a function name. |
| Find the next token (everything up to end or next |
| blank). */ |
| if (**argptr |
| && strchr (get_gdb_completer_quote_characters (), |
| **argptr) != NULL) |
| { |
| p = skip_quoted (*argptr); |
| *argptr = *argptr + 1; |
| } |
| else |
| { |
| /* At this point argptr->"fun". */ |
| p = *argptr; |
| while (*p && *p != ' ' && *p != '\t' && *p != ',' && *p != ':') |
| p++; |
| /* At this point p->"". String ended. */ |
| } |
| |
| /* Allocate our own copy of the substring between argptr and |
| p. */ |
| copy = (char *) alloca (p - *argptr + 1); |
| memcpy (copy, *argptr, p - *argptr); |
| copy[p - *argptr] = '\0'; |
| if (p != *argptr |
| && copy[p - *argptr - 1] |
| && strchr (get_gdb_completer_quote_characters (), |
| copy[p - *argptr - 1]) != NULL) |
| copy[p - *argptr - 1] = '\0'; |
| |
| /* At this point copy->"fun", p->"" */ |
| |
| /* No line number may be specified. */ |
| while (*p == ' ' || *p == '\t') |
| p++; |
| *argptr = p; |
| /* At this point arptr->"". */ |
| |
| /* Look for copy as a method of sym_class. */ |
| /* At this point copy->"fun", sym_class is "AAA:inA", |
| saved_arg->"AAA::inA::fun". This concludes the scanning of |
| the string for possible components matches. If we find it |
| here, we return. If not, and we are at the and of the string, |
| we'll lookup the whole string in the symbol tables. */ |
| |
| return find_method (funfirstline, canonical, saved_arg, |
| copy, t, sym_class); |
| |
| } /* End if symbol found */ |
| |
| |
| /* We couldn't find a class, so we're in case 2 above. We check the |
| entire name as a symbol instead. */ |
| |
| copy = (char *) alloca (p - saved_arg2 + 1); |
| memcpy (copy, saved_arg2, p - saved_arg2); |
| /* Note: if is_quoted should be true, we snuff out quote here |
| anyway. */ |
| copy[p - saved_arg2] = '\000'; |
| /* Set argptr to skip over the name. */ |
| *argptr = (*p == '\'') ? p + 1 : p; |
| |
| /* Look up entire name */ |
| sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0, &sym_symtab); |
| if (sym) |
| return symbol_found (funfirstline, canonical, copy, sym, |
| NULL, sym_symtab); |
| |
| /* Couldn't find any interpretation as classes/namespaces, so give |
| up. The quotes are important if copy is empty. */ |
| cplusplus_error (saved_arg, |
| "Can't find member of namespace, class, struct, or union named \"%s\"\n", |
| copy); |
| } |
| |
| /* Next come some helper functions for decode_compound. */ |
| |
| /* Return the symbol corresponding to the substring of *ARGPTR ending |
| at P, allowing whitespace. Also, advance *ARGPTR past the symbol |
| name in question, the compound object separator ("::" or "."), and |
| whitespace. Note that *ARGPTR is changed whether or not the |
| lookup_symbol call finds anything (i.e we return NULL). As an |
| example, say ARGPTR is "AAA::inA::fun" and P is "::inA::fun". */ |
| |
| static struct symbol * |
| lookup_prefix_sym (char **argptr, char *p) |
| { |
| char *p1; |
| char *copy; |
| |
| /* Extract the class name. */ |
| p1 = p; |
| while (p != *argptr && p[-1] == ' ') |
| --p; |
| copy = (char *) alloca (p - *argptr + 1); |
| memcpy (copy, *argptr, p - *argptr); |
| copy[p - *argptr] = 0; |
| |
| /* Discard the class name from the argptr. */ |
| p = p1 + (p1[0] == ':' ? 2 : 1); |
| while (*p == ' ' || *p == '\t') |
| p++; |
| *argptr = p; |
| |
| /* At this point p1->"::inA::fun", p->"inA::fun" copy->"AAA", |
| argptr->"inA::fun" */ |
| |
| return lookup_symbol (copy, 0, STRUCT_DOMAIN, 0, |
| (struct symtab **) NULL); |
| } |
| |
| /* This finds the method COPY in the class whose type is T and whose |
| symbol is SYM_CLASS. */ |
| |
| static struct symtabs_and_lines |
| find_method (int funfirstline, char ***canonical, char *saved_arg, |
| char *copy, struct type *t, struct symbol *sym_class) |
| { |
| struct symtabs_and_lines values; |
| struct symbol *sym = 0; |
| int i1; /* Counter for the symbol array. */ |
| struct symbol **sym_arr = alloca (total_number_of_methods (t) |
| * sizeof (struct symbol *)); |
| |
| /* Find all methods with a matching name, and put them in |
| sym_arr. */ |
| |
| i1 = collect_methods (copy, t, sym_arr); |
| |
| if (i1 == 1) |
| { |
| /* There is exactly one field with that name. */ |
| sym = sym_arr[0]; |
| |
| if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| { |
| values.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| values.nelts = 1; |
| values.sals[0] = find_function_start_sal (sym, |
| funfirstline); |
| } |
| else |
| { |
| values.nelts = 0; |
| } |
| return values; |
| } |
| if (i1 > 0) |
| { |
| /* There is more than one field with that name |
| (overloaded). Ask the user which one to use. */ |
| return decode_line_2 (sym_arr, i1, funfirstline, canonical); |
| } |
| else |
| { |
| char *tmp; |
| |
| if (is_operator_name (copy)) |
| { |
| tmp = (char *) alloca (strlen (copy + 3) + 9); |
| strcpy (tmp, "operator "); |
| strcat (tmp, copy + 3); |
| } |
| else |
| tmp = copy; |
| if (tmp[0] == '~') |
| cplusplus_error (saved_arg, |
| "the class `%s' does not have destructor defined\n", |
| SYMBOL_PRINT_NAME (sym_class)); |
| else |
| cplusplus_error (saved_arg, |
| "the class %s does not have any method named %s\n", |
| SYMBOL_PRINT_NAME (sym_class), tmp); |
| } |
| } |
| |
| /* Find all methods named COPY in the class whose type is T, and put |
| them in SYM_ARR. Return the number of methods found. */ |
| |
| static int |
| collect_methods (char *copy, struct type *t, |
| struct symbol **sym_arr) |
| { |
| int i1 = 0; /* Counter for the symbol array. */ |
| |
| if (destructor_name_p (copy, t)) |
| { |
| /* Destructors are a special case. */ |
| int m_index, f_index; |
| |
| if (get_destructor_fn_field (t, &m_index, &f_index)) |
| { |
| struct fn_field *f = TYPE_FN_FIELDLIST1 (t, m_index); |
| |
| sym_arr[i1] = |
| lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, f_index), |
| NULL, VAR_DOMAIN, (int *) NULL, |
| (struct symtab **) NULL); |
| if (sym_arr[i1]) |
| i1++; |
| } |
| } |
| else |
| i1 = find_methods (t, copy, sym_arr); |
| |
| return i1; |
| } |
| |
| |
| |
| /* Return the symtab associated to the filename given by the substring |
| of *ARGPTR ending at P, and advance ARGPTR past that filename. If |
| NOT_FOUND_PTR is not null and the source file is not found, store |
| boolean true at the location pointed to and do not issue an |
| error message. */ |
| |
| static struct symtab * |
| symtab_from_filename (char **argptr, char *p, int is_quote_enclosed, |
| int *not_found_ptr) |
| { |
| char *p1; |
| char *copy; |
| struct symtab *file_symtab; |
| |
| p1 = p; |
| while (p != *argptr && p[-1] == ' ') |
| --p; |
| if ((*p == '"') && is_quote_enclosed) |
| --p; |
| copy = (char *) alloca (p - *argptr + 1); |
| memcpy (copy, *argptr, p - *argptr); |
| /* It may have the ending quote right after the file name. */ |
| if (is_quote_enclosed && copy[p - *argptr - 1] == '"') |
| copy[p - *argptr - 1] = 0; |
| else |
| copy[p - *argptr] = 0; |
| |
| /* Find that file's data. */ |
| file_symtab = lookup_symtab (copy); |
| if (file_symtab == 0) |
| { |
| if (!have_full_symbols () && !have_partial_symbols ()) |
| error (_("No symbol table is loaded. Use the \"file\" command.")); |
| if (not_found_ptr) |
| *not_found_ptr = 1; |
| throw_error (NOT_FOUND_ERROR, _("No source file named %s."), copy); |
| } |
| |
| /* Discard the file name from the arg. */ |
| p = p1 + 1; |
| while (*p == ' ' || *p == '\t') |
| p++; |
| *argptr = p; |
| |
| return file_symtab; |
| } |
| |
| |
| |
| /* This decodes a line where the argument is all digits (possibly |
| preceded by a sign). Q should point to the end of those digits; |
| the other arguments are as usual. */ |
| |
| static struct symtabs_and_lines |
| decode_all_digits (char **argptr, struct symtab *default_symtab, |
| int default_line, char ***canonical, |
| struct symtab *file_symtab, char *q) |
| |
| { |
| struct symtabs_and_lines values; |
| struct symtab_and_line val; |
| |
| enum sign |
| { |
| none, plus, minus |
| } |
| sign = none; |
| |
| /* We might need a canonical line spec if no file was specified. */ |
| int need_canonical = (file_symtab == 0) ? 1 : 0; |
| |
| init_sal (&val); |
| |
| /* This is where we need to make sure that we have good defaults. |
| We must guarantee that this section of code is never executed |
| when we are called with just a function name, since |
| set_default_source_symtab_and_line uses |
| select_source_symtab that calls us with such an argument. */ |
| |
| if (file_symtab == 0 && default_symtab == 0) |
| { |
| /* Make sure we have at least a default source file. */ |
| set_default_source_symtab_and_line (); |
| initialize_defaults (&default_symtab, &default_line); |
| } |
| |
| if (**argptr == '+') |
| sign = plus, (*argptr)++; |
| else if (**argptr == '-') |
| sign = minus, (*argptr)++; |
| val.line = atoi (*argptr); |
| switch (sign) |
| { |
| case plus: |
| if (q == *argptr) |
| val.line = 5; |
| if (file_symtab == 0) |
| val.line = default_line + val.line; |
| break; |
| case minus: |
| if (q == *argptr) |
| val.line = 15; |
| if (file_symtab == 0) |
| val.line = default_line - val.line; |
| else |
| val.line = 1; |
| break; |
| case none: |
| break; /* No need to adjust val.line. */ |
| } |
| |
| while (*q == ' ' || *q == '\t') |
| q++; |
| *argptr = q; |
| if (file_symtab == 0) |
| file_symtab = default_symtab; |
| |
| /* It is possible that this source file has more than one symtab, |
| and that the new line number specification has moved us from the |
| default (in file_symtab) to a new one. */ |
| val.symtab = find_line_symtab (file_symtab, val.line, NULL, NULL); |
| if (val.symtab == 0) |
| val.symtab = file_symtab; |
| |
| val.pc = 0; |
| values.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| values.sals[0] = val; |
| values.nelts = 1; |
| if (need_canonical) |
| build_canonical_line_spec (values.sals, NULL, canonical); |
| return values; |
| } |
| |
| |
| |
| /* Decode a linespec starting with a dollar sign. */ |
| |
| static struct symtabs_and_lines |
| decode_dollar (char *copy, int funfirstline, struct symtab *default_symtab, |
| char ***canonical, struct symtab *file_symtab) |
| { |
| struct value *valx; |
| int index = 0; |
| int need_canonical = 0; |
| struct symtabs_and_lines values; |
| struct symtab_and_line val; |
| char *p; |
| struct symbol *sym; |
| /* The symtab that SYM was found in. */ |
| struct symtab *sym_symtab; |
| struct minimal_symbol *msymbol; |
| |
| p = (copy[1] == '$') ? copy + 2 : copy + 1; |
| while (*p >= '0' && *p <= '9') |
| p++; |
| if (!*p) /* Reached end of token without hitting non-digit. */ |
| { |
| /* We have a value history reference. */ |
| sscanf ((copy[1] == '$') ? copy + 2 : copy + 1, "%d", &index); |
| valx = access_value_history ((copy[1] == '$') ? -index : index); |
| if (TYPE_CODE (value_type (valx)) != TYPE_CODE_INT) |
| error (_("History values used in line specs must have integer values.")); |
| } |
| else |
| { |
| /* Not all digits -- may be user variable/function or a |
| convenience variable. */ |
| |
| /* Look up entire name as a symbol first. */ |
| sym = lookup_symbol (copy, 0, VAR_DOMAIN, 0, &sym_symtab); |
| file_symtab = (struct symtab *) 0; |
| need_canonical = 1; |
| /* Symbol was found --> jump to normal symbol processing. */ |
| if (sym) |
| return symbol_found (funfirstline, canonical, copy, sym, |
| NULL, sym_symtab); |
| |
| /* If symbol was not found, look in minimal symbol tables. */ |
| msymbol = lookup_minimal_symbol (copy, NULL, NULL); |
| /* Min symbol was found --> jump to minsym processing. */ |
| if (msymbol) |
| return minsym_found (funfirstline, msymbol); |
| |
| /* Not a user variable or function -- must be convenience variable. */ |
| need_canonical = (file_symtab == 0) ? 1 : 0; |
| valx = value_of_internalvar (lookup_internalvar (copy + 1)); |
| if (TYPE_CODE (value_type (valx)) != TYPE_CODE_INT) |
| error (_("Convenience variables used in line specs must have integer values.")); |
| } |
| |
| init_sal (&val); |
| |
| /* Either history value or convenience value from above, in valx. */ |
| val.symtab = file_symtab ? file_symtab : default_symtab; |
| val.line = value_as_long (valx); |
| val.pc = 0; |
| |
| values.sals = (struct symtab_and_line *) xmalloc (sizeof val); |
| values.sals[0] = val; |
| values.nelts = 1; |
| |
| if (need_canonical) |
| build_canonical_line_spec (values.sals, NULL, canonical); |
| |
| return values; |
| } |
| |
| |
| |
| /* Decode a linespec that's a variable. If FILE_SYMTAB is non-NULL, |
| look in that symtab's static variables first. If NOT_FOUND_PTR is not NULL and |
| the function cannot be found, store boolean true in the location pointed to |
| and do not issue an error message. */ |
| |
| static struct symtabs_and_lines |
| decode_variable (char *copy, int funfirstline, char ***canonical, |
| struct symtab *file_symtab, int *not_found_ptr) |
| { |
| struct symbol *sym; |
| /* The symtab that SYM was found in. */ |
| struct symtab *sym_symtab; |
| |
| struct minimal_symbol *msymbol; |
| |
| sym = lookup_symbol (copy, |
| (file_symtab |
| ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (file_symtab), |
| STATIC_BLOCK) |
| : get_selected_block (0)), |
| VAR_DOMAIN, 0, &sym_symtab); |
| |
| if (sym != NULL) |
| return symbol_found (funfirstline, canonical, copy, sym, |
| file_symtab, sym_symtab); |
| |
| msymbol = lookup_minimal_symbol (copy, NULL, NULL); |
| |
| if (msymbol != NULL) |
| return minsym_found (funfirstline, msymbol); |
| |
| if (!have_full_symbols () && |
| !have_partial_symbols () && !have_minimal_symbols ()) |
| error (_("No symbol table is loaded. Use the \"file\" command.")); |
| |
| if (not_found_ptr) |
| *not_found_ptr = 1; |
| throw_error (NOT_FOUND_ERROR, _("Function \"%s\" not defined."), copy); |
| } |
| |
| |
| |
| |
| /* Now come some functions that are called from multiple places within |
| decode_line_1. */ |
| |
| /* We've found a symbol SYM to associate with our linespec; build a |
| corresponding struct symtabs_and_lines. */ |
| |
| static struct symtabs_and_lines |
| symbol_found (int funfirstline, char ***canonical, char *copy, |
| struct symbol *sym, struct symtab *file_symtab, |
| struct symtab *sym_symtab) |
| { |
| struct symtabs_and_lines values; |
| |
| if (SYMBOL_CLASS (sym) == LOC_BLOCK) |
| { |
| /* Arg is the name of a function */ |
| values.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| values.sals[0] = find_function_start_sal (sym, funfirstline); |
| values.nelts = 1; |
| |
| /* Don't use the SYMBOL_LINE; if used at all it points to |
| the line containing the parameters or thereabouts, not |
| the first line of code. */ |
| |
| /* We might need a canonical line spec if it is a static |
| function. */ |
| if (file_symtab == 0) |
| { |
| struct blockvector *bv = BLOCKVECTOR (sym_symtab); |
| struct block *b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
| if (lookup_block_symbol (b, copy, NULL, VAR_DOMAIN) != NULL) |
| build_canonical_line_spec (values.sals, copy, canonical); |
| } |
| return values; |
| } |
| else |
| { |
| if (funfirstline) |
| error (_("\"%s\" is not a function"), copy); |
| else if (SYMBOL_LINE (sym) != 0) |
| { |
| /* We know its line number. */ |
| values.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| values.nelts = 1; |
| memset (&values.sals[0], 0, sizeof (values.sals[0])); |
| values.sals[0].symtab = sym_symtab; |
| values.sals[0].line = SYMBOL_LINE (sym); |
| return values; |
| } |
| else |
| /* This can happen if it is compiled with a compiler which doesn't |
| put out line numbers for variables. */ |
| /* FIXME: Shouldn't we just set .line and .symtab to zero |
| and return? For example, "info line foo" could print |
| the address. */ |
| error (_("Line number not known for symbol \"%s\""), copy); |
| } |
| } |
| |
| /* We've found a minimal symbol MSYMBOL to associate with our |
| linespec; build a corresponding struct symtabs_and_lines. */ |
| |
| static struct symtabs_and_lines |
| minsym_found (int funfirstline, struct minimal_symbol *msymbol) |
| { |
| struct symtabs_and_lines values; |
| |
| values.sals = (struct symtab_and_line *) |
| xmalloc (sizeof (struct symtab_and_line)); |
| values.sals[0] = find_pc_sect_line (SYMBOL_VALUE_ADDRESS (msymbol), |
| (struct bfd_section *) 0, 0); |
| values.sals[0].section = SYMBOL_BFD_SECTION (msymbol); |
| if (funfirstline) |
| { |
| values.sals[0].pc += DEPRECATED_FUNCTION_START_OFFSET; |
| values.sals[0].pc = SKIP_PROLOGUE (values.sals[0].pc); |
| } |
| values.nelts = 1; |
| return values; |
| } |