| /* Block definitions for GDB. |
| Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
| 1997, 1998, 1999, 2000, 2001, 2002 |
| 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. */ |
| |
| /* All of the name-scope contours of the program |
| are represented by `struct block' objects. |
| All of these objects are pointed to by the blockvector. |
| |
| Each block represents one name scope. |
| Each lexical context has its own block. |
| |
| The blockvector begins with some special blocks. |
| The GLOBAL_BLOCK contains all the symbols defined in this compilation |
| whose scope is the entire program linked together. |
| The STATIC_BLOCK contains all the symbols whose scope is the |
| entire compilation excluding other separate compilations. |
| Blocks starting with the FIRST_LOCAL_BLOCK are not special. |
| |
| Each block records a range of core addresses for the code that |
| is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK |
| give, for the range of code, the entire range of code produced |
| by the compilation that the symbol segment belongs to. |
| |
| The blocks appear in the blockvector |
| in order of increasing starting-address, |
| and, within that, in order of decreasing ending-address. |
| |
| This implies that within the body of one function |
| the blocks appear in the order of a depth-first tree walk. */ |
| |
| /* Opaque declarations. */ |
| |
| struct symbol; |
| struct dictionary; |
| struct namespace_info; |
| struct using_direct_node; |
| struct obstack; |
| |
| struct block |
| { |
| |
| /* Addresses in the executable code that are in this block. */ |
| |
| CORE_ADDR startaddr; |
| CORE_ADDR endaddr; |
| |
| /* The symbol that names this block, if the block is the body of a |
| function; otherwise, zero. */ |
| |
| struct symbol *function; |
| |
| /* The `struct block' for the containing block, or 0 if none. |
| |
| The superblock of a top-level local block (i.e. a function in the |
| case of C) is the STATIC_BLOCK. The superblock of the |
| STATIC_BLOCK is the GLOBAL_BLOCK. */ |
| |
| struct block *superblock; |
| |
| /* This is used to store the symbols in the block. */ |
| |
| struct dictionary *dict; |
| |
| /* Used for language-specific info. */ |
| |
| union |
| { |
| struct |
| { |
| /* Contains information about namespace-related info relevant to |
| this block: using directives and the current namespace |
| scope. */ |
| |
| struct namespace_info *namespace; |
| } |
| cplus_specific; |
| } |
| language_specific; |
| |
| /* Version of GCC used to compile the function corresponding |
| to this block, or 0 if not compiled with GCC. When possible, |
| GCC should be compatible with the native compiler, or if that |
| is not feasible, the differences should be fixed during symbol |
| reading. As of 16 Apr 93, this flag is never used to distinguish |
| between gcc2 and the native compiler. |
| |
| If there is no function corresponding to this block, this meaning |
| of this flag is undefined. */ |
| |
| unsigned char gcc_compile_flag; |
| }; |
| |
| #define BLOCK_START(bl) (bl)->startaddr |
| #define BLOCK_END(bl) (bl)->endaddr |
| #define BLOCK_FUNCTION(bl) (bl)->function |
| #define BLOCK_SUPERBLOCK(bl) (bl)->superblock |
| #define BLOCK_DICT(bl) (bl)->dict |
| #define BLOCK_NAMESPACE(bl) (bl)->language_specific.cplus_specific.namespace |
| #define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag |
| |
| struct blockvector |
| { |
| /* Number of blocks in the list. */ |
| int nblocks; |
| /* The blocks themselves. */ |
| struct block *block[1]; |
| }; |
| |
| #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks |
| #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n] |
| |
| /* Special block numbers */ |
| |
| #define GLOBAL_BLOCK 0 |
| #define STATIC_BLOCK 1 |
| #define FIRST_LOCAL_BLOCK 2 |
| |
| extern struct symbol *block_function (const struct block *); |
| |
| extern int contained_in (const struct block *, const struct block *); |
| |
| /* NOTE: carlton/2002-11-27: I'm a little bit torn about whether many |
| of these should go here or in cp-support.h. I ended up putting |
| them here, since they really do use the block structure, but one |
| could argue with my decision. */ |
| |
| extern struct using_direct_node *block_using (const struct block *); |
| |
| extern struct using_direct_node *block_all_usings (const struct block *block); |
| |
| extern void block_set_using (struct block *block, |
| struct using_direct_node *using, |
| struct obstack *obstack); |
| |
| extern const char *block_scope (const struct block *block); |
| |
| extern void block_set_scope (struct block *block, const char *scope, |
| struct obstack *obstack); |
| |
| extern const struct block *block_static_block (const struct block *block); |
| |
| /* In an ideal world, this would be opaque: don't access it directly, |
| just use the iterator functions. */ |
| |
| struct block_using_iterator |
| { |
| const struct block *current_block; |
| const struct using_direct_node *next_node; |
| }; |
| |
| /* Initialize ITERATOR to point at the first using directive valid for |
| BLOCK, and return that using directive, or NULL if there aren't |
| any. */ |
| |
| extern struct |
| using_direct *block_using_iterator_first (const struct block *block, |
| struct block_using_iterator |
| *iterator); |
| |
| /* Advance ITERATOR, and return the next using directive, or NULL if |
| there aren't any more. Don't call this if you've previously |
| received NULL from block_using_iterator_first or |
| block_using_iterator_next during this iteration. */ |
| |
| extern struct |
| using_direct *block_using_iterator_next (struct block_using_iterator |
| *iterator); |
| |
| /* Allocate a dummy block. See warnings before the source code of |
| this function about using it correctly. */ |
| |
| extern struct block *allocate_block (struct obstack *obstack); |