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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [block.h] - Blame information for rev 157

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1 24 jeremybenn
/* Code dealing with blocks for GDB.
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   Copyright (C) 2003, 2007, 2008 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#ifndef BLOCK_H
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#define BLOCK_H
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/* Opaque declarations.  */
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struct symbol;
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struct symtab;
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struct block_namespace_info;
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struct using_direct;
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struct obstack;
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struct dictionary;
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struct addrmap;
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/* All of the name-scope contours of the program
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   are represented by `struct block' objects.
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   All of these objects are pointed to by the blockvector.
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   Each block represents one name scope.
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   Each lexical context has its own block.
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   The blockvector begins with some special blocks.
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   The GLOBAL_BLOCK contains all the symbols defined in this compilation
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   whose scope is the entire program linked together.
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   The STATIC_BLOCK contains all the symbols whose scope is the
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   entire compilation excluding other separate compilations.
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   Blocks starting with the FIRST_LOCAL_BLOCK are not special.
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   Each block records a range of core addresses for the code that
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   is in the scope of the block.  The STATIC_BLOCK and GLOBAL_BLOCK
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   give, for the range of code, the entire range of code produced
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   by the compilation that the symbol segment belongs to.
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   The blocks appear in the blockvector
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   in order of increasing starting-address,
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   and, within that, in order of decreasing ending-address.
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   This implies that within the body of one function
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   the blocks appear in the order of a depth-first tree walk.  */
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struct block
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{
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  /* Addresses in the executable code that are in this block.  */
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  CORE_ADDR startaddr;
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  CORE_ADDR endaddr;
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  /* The symbol that names this block, if the block is the body of a
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     function; otherwise, zero.  */
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  struct symbol *function;
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  /* The `struct block' for the containing block, or 0 if none.
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     The superblock of a top-level local block (i.e. a function in the
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     case of C) is the STATIC_BLOCK.  The superblock of the
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     STATIC_BLOCK is the GLOBAL_BLOCK.  */
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  struct block *superblock;
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  /* This is used to store the symbols in the block.  */
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  struct dictionary *dict;
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  /* Used for language-specific info.  */
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  union
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  {
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    struct
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    {
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      /* Contains information about namespace-related info relevant to
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         this block: using directives and the current namespace
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         scope.  */
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      struct block_namespace_info *namespace;
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    }
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    cplus_specific;
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  }
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  language_specific;
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};
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#define BLOCK_START(bl)         (bl)->startaddr
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#define BLOCK_END(bl)           (bl)->endaddr
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#define BLOCK_FUNCTION(bl)      (bl)->function
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#define BLOCK_SUPERBLOCK(bl)    (bl)->superblock
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#define BLOCK_DICT(bl)          (bl)->dict
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#define BLOCK_NAMESPACE(bl)   (bl)->language_specific.cplus_specific.namespace
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/* Macro to loop through all symbols in a block BL, in no particular
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   order.  ITER helps keep track of the iteration, and should be a
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   struct dict_iterator.  SYM points to the current symbol.  */
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#define ALL_BLOCK_SYMBOLS(block, iter, sym)                     \
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        ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
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struct blockvector
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{
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  /* Number of blocks in the list.  */
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  int nblocks;
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  /* An address map mapping addresses to blocks in this blockvector.
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     This pointer is zero if the blocks' start and end addresses are
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     enough.  */
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  struct addrmap *map;
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  /* The blocks themselves.  */
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  struct block *block[1];
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};
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#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
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#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
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#define BLOCKVECTOR_MAP(blocklist) ((blocklist)->map)
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/* Special block numbers */
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enum { GLOBAL_BLOCK = 0, STATIC_BLOCK = 1, FIRST_LOCAL_BLOCK = 2 };
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extern struct symbol *block_function (const struct block *);
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extern int contained_in (const struct block *, const struct block *);
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extern struct blockvector *blockvector_for_pc (CORE_ADDR, struct block **);
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extern struct blockvector *blockvector_for_pc_sect (CORE_ADDR, asection *,
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                                                    struct block **,
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                                                    struct symtab *);
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extern struct block *block_for_pc (CORE_ADDR);
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extern struct block *block_for_pc_sect (CORE_ADDR, asection *);
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extern const char *block_scope (const struct block *block);
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extern void block_set_scope (struct block *block, const char *scope,
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                             struct obstack *obstack);
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extern struct using_direct *block_using (const struct block *block);
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extern void block_set_using (struct block *block,
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                             struct using_direct *using,
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                             struct obstack *obstack);
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extern const struct block *block_static_block (const struct block *block);
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extern const struct block *block_global_block (const struct block *block);
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extern struct block *allocate_block (struct obstack *obstack);
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#endif /* BLOCK_H */

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