mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-24 10:35:12 +08:00
0cf566ec65
* block.c (contained_in): Add 'const' to arguments. (block_function): Ditto. * block.h: Update declarations for block_function and contained_in.
219 lines
7.2 KiB
C
219 lines
7.2 KiB
C
/* Code dealing with blocks for GDB.
|
|
|
|
Copyright 2003 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. */
|
|
|
|
#ifndef BLOCK_H
|
|
#define BLOCK_H
|
|
|
|
/* Opaque declarations. */
|
|
|
|
struct symbol;
|
|
struct symtab;
|
|
struct block_namespace_info;
|
|
struct using_direct;
|
|
struct obstack;
|
|
|
|
/* 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. */
|
|
|
|
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;
|
|
|
|
/* 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 block_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;
|
|
|
|
/* The symbols for this block are either in a simple linear list or
|
|
in a simple hashtable. Blocks which correspond to a function
|
|
(which have a list of symbols corresponding to arguments) use
|
|
a linear list, as do some older symbol readers (currently only
|
|
mdebugread and dstread). Other blocks are hashed.
|
|
|
|
The hashtable uses the same hash function as the minsym hashtables,
|
|
found in minsyms.c:minsym_hash_iw. Symbols are hashed based on
|
|
their demangled name if appropriate, and on their name otherwise.
|
|
The hash function ignores space, and stops at the beginning of the
|
|
argument list if any.
|
|
|
|
The table is laid out in NSYMS/5 buckets and symbols are chained via
|
|
their hash_next field. */
|
|
|
|
/* If this is really a hashtable of the symbols, this flag is 1. */
|
|
|
|
unsigned char hashtable;
|
|
|
|
/* Number of local symbols. */
|
|
|
|
int nsyms;
|
|
|
|
/* The symbols. If some of them are arguments, then they must be
|
|
in the order in which we would like to print them. */
|
|
|
|
struct symbol *sym[1];
|
|
};
|
|
|
|
#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_GCC_COMPILED(bl) (bl)->gcc_compile_flag
|
|
#define BLOCK_NAMESPACE(bl) (bl)->language_specific.cplus_specific.namespace
|
|
#define BLOCK_HASHTABLE(bl) (bl)->hashtable
|
|
|
|
/* For blocks without a hashtable (BLOCK_HASHTABLE (bl) == 0) only. */
|
|
#define BLOCK_NSYMS(bl) (bl)->nsyms
|
|
#define BLOCK_SYM(bl, n) (bl)->sym[n]
|
|
|
|
/* For blocks with a hashtable, but these are valid for non-hashed blocks as
|
|
well - each symbol will appear to be one bucket by itself. */
|
|
#define BLOCK_BUCKETS(bl) (bl)->nsyms
|
|
#define BLOCK_BUCKET(bl, n) (bl)->sym[n]
|
|
|
|
/* Macro used to set the size of a hashtable for N symbols. */
|
|
#define BLOCK_HASHTABLE_SIZE(n) ((n)/5 + 1)
|
|
|
|
/* Macro to loop through all symbols in a block BL, in no particular order.
|
|
i counts which bucket we are in, and sym points to the current symbol. */
|
|
|
|
#define ALL_BLOCK_SYMBOLS(bl, i, sym) \
|
|
for ((i) = 0; (i) < BLOCK_BUCKETS ((bl)); (i)++) \
|
|
for ((sym) = BLOCK_BUCKET ((bl), (i)); (sym); \
|
|
(sym) = (sym)->hash_next)
|
|
|
|
/* Nonzero if symbols of block BL should be sorted alphabetically.
|
|
Don't sort a block which corresponds to a function. If we did the
|
|
sorting would have to preserve the order of the symbols for the
|
|
arguments. Also don't sort any block that we chose to hash. */
|
|
|
|
#define BLOCK_SHOULD_SORT(bl) (! BLOCK_HASHTABLE (bl) \
|
|
&& BLOCK_FUNCTION (bl) == NULL)
|
|
|
|
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 *);
|
|
|
|
extern struct blockvector *blockvector_for_pc (CORE_ADDR, int *);
|
|
|
|
extern struct blockvector *blockvector_for_pc_sect (CORE_ADDR, asection *,
|
|
int *, struct symtab *);
|
|
|
|
extern struct block *block_for_pc (CORE_ADDR);
|
|
|
|
extern struct block *block_for_pc_sect (CORE_ADDR, asection *);
|
|
|
|
extern const char *block_scope (const struct block *block);
|
|
|
|
extern void block_set_scope (struct block *block, const char *scope,
|
|
struct obstack *obstack);
|
|
|
|
extern struct using_direct *block_using (const struct block *block);
|
|
|
|
extern void block_set_using (struct block *block,
|
|
struct using_direct *using,
|
|
struct obstack *obstack);
|
|
|
|
extern const struct block *block_static_block (const struct block *block);
|
|
|
|
extern const struct block *block_global_block (const struct block *block);
|
|
|
|
#endif /* BLOCK_H */
|