From d2630e6981fdf96c90cd6d9ec80d78c9155a80b9 Mon Sep 17 00:00:00 2001 From: Adam Fedor Date: Sun, 27 Apr 2003 03:23:38 +0000 Subject: * linespec.c (decode_objc): New function to decode ObjC calls (decode_line_1): Check for ObjC calls (using decode_objc) * Makefile (linespec.o): Update dependencies. --- gdb/linespec.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) (limited to 'gdb/linespec.c') diff --git a/gdb/linespec.c b/gdb/linespec.c index 2738b1e..ea52a80 100644 --- a/gdb/linespec.c +++ b/gdb/linespec.c @@ -33,6 +33,7 @@ #include "cp-abi.h" #include "parser-defs.h" #include "block.h" +#include "objc-lang.h" /* We share this one with symtab.c, but it is not exported widely. */ @@ -49,6 +50,12 @@ 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, @@ -589,6 +596,7 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, 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; /* Defaults have defaults. */ @@ -614,6 +622,25 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, 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 (*p && (p[0] == ':') && (strchr ("+-", p[1]) != NULL) + && (p[2] == '[')) + { + 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) @@ -695,6 +722,11 @@ decode_line_1 (char **argptr, int funfirstline, struct symtab *default_symtab, 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; @@ -893,6 +925,13 @@ locate_first_half (char **argptr, int *is_quote_enclosed) 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 (*p && (p[0] == ':') && (strchr ("+-", p[1]) != NULL) + && (p[2] == '[')) + { + 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 @@ -936,6 +975,95 @@ locate_first_half (char **argptr, int *is_quote_enclosed) +/* 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. */ -- cgit v1.1