314 lines
11 KiB
C
314 lines
11 KiB
C
/* Code dealing with blocks for GDB.
|
|
|
|
Copyright (C) 2003-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef BLOCK_H
|
|
#define BLOCK_H
|
|
|
|
#include "dictionary.h"
|
|
|
|
/* Opaque declarations. */
|
|
|
|
struct symbol;
|
|
struct compunit_symtab;
|
|
struct block_namespace_info;
|
|
struct using_direct;
|
|
struct obstack;
|
|
struct addrmap;
|
|
|
|
/* 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 (real or inlined); 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 block_namespace_info *namespace;
|
|
}
|
|
cplus_specific;
|
|
}
|
|
language_specific;
|
|
};
|
|
|
|
/* The global block is singled out so that we can provide a back-link
|
|
to the compunit symtab. */
|
|
|
|
struct global_block
|
|
{
|
|
/* The block. */
|
|
|
|
struct block block;
|
|
|
|
/* This holds a pointer to the compunit symtab holding this block. */
|
|
|
|
struct compunit_symtab *compunit_symtab;
|
|
};
|
|
|
|
#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
|
|
|
|
struct blockvector
|
|
{
|
|
/* Number of blocks in the list. */
|
|
int nblocks;
|
|
/* An address map mapping addresses to blocks in this blockvector.
|
|
This pointer is zero if the blocks' start and end addresses are
|
|
enough. */
|
|
struct addrmap *map;
|
|
/* The blocks themselves. */
|
|
struct block *block[1];
|
|
};
|
|
|
|
#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
|
|
#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
|
|
#define BLOCKVECTOR_MAP(blocklist) ((blocklist)->map)
|
|
|
|
/* Return the objfile of BLOCK, which must be non-NULL. */
|
|
|
|
extern struct objfile *block_objfile (const struct block *block);
|
|
|
|
/* Return the architecture of BLOCK, which must be non-NULL. */
|
|
|
|
extern struct gdbarch *block_gdbarch (const struct block *block);
|
|
|
|
extern struct symbol *block_linkage_function (const struct block *);
|
|
|
|
extern struct symbol *block_containing_function (const struct block *);
|
|
|
|
extern int block_inlined_p (const struct block *block);
|
|
|
|
extern int contained_in (const struct block *, const struct block *);
|
|
|
|
extern const struct blockvector *blockvector_for_pc (CORE_ADDR,
|
|
const struct block **);
|
|
|
|
extern const struct blockvector *
|
|
blockvector_for_pc_sect (CORE_ADDR, struct obj_section *,
|
|
const struct block **, struct compunit_symtab *);
|
|
|
|
extern int blockvector_contains_pc (const struct blockvector *bv, CORE_ADDR pc);
|
|
|
|
extern struct call_site *call_site_for_pc (struct gdbarch *gdbarch,
|
|
CORE_ADDR pc);
|
|
|
|
extern const struct block *block_for_pc (CORE_ADDR);
|
|
|
|
extern const struct block *block_for_pc_sect (CORE_ADDR, struct obj_section *);
|
|
|
|
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);
|
|
|
|
extern struct block *allocate_block (struct obstack *obstack);
|
|
|
|
extern struct block *allocate_global_block (struct obstack *obstack);
|
|
|
|
extern void set_block_compunit_symtab (struct block *,
|
|
struct compunit_symtab *);
|
|
|
|
/* A block iterator. This structure should be treated as though it
|
|
were opaque; it is only defined here because we want to support
|
|
stack allocation of iterators. */
|
|
|
|
struct block_iterator
|
|
{
|
|
/* If we're iterating over a single block, this holds the block.
|
|
Otherwise, it holds the canonical compunit. */
|
|
|
|
union
|
|
{
|
|
struct compunit_symtab *compunit_symtab;
|
|
const struct block *block;
|
|
} d;
|
|
|
|
/* If we're iterating over a single block, this is always -1.
|
|
Otherwise, it holds the index of the current "included" symtab in
|
|
the canonical symtab (that is, d.symtab->includes[idx]), with -1
|
|
meaning the canonical symtab itself. */
|
|
|
|
int idx;
|
|
|
|
/* Which block, either static or global, to iterate over. If this
|
|
is FIRST_LOCAL_BLOCK, then we are iterating over a single block.
|
|
This is used to select which field of 'd' is in use. */
|
|
|
|
enum block_enum which;
|
|
|
|
/* The underlying dictionary iterator. */
|
|
|
|
struct dict_iterator dict_iter;
|
|
};
|
|
|
|
/* Initialize ITERATOR to point at the first symbol in BLOCK, and
|
|
return that first symbol, or NULL if BLOCK is empty. */
|
|
|
|
extern struct symbol *block_iterator_first (const struct block *block,
|
|
struct block_iterator *iterator);
|
|
|
|
/* Advance ITERATOR, and return the next symbol, or NULL if there are
|
|
no more symbols. Don't call this if you've previously received
|
|
NULL from block_iterator_first or block_iterator_next on this
|
|
iteration. */
|
|
|
|
extern struct symbol *block_iterator_next (struct block_iterator *iterator);
|
|
|
|
/* Initialize ITERATOR to point at the first symbol in BLOCK whose
|
|
SYMBOL_SEARCH_NAME is NAME (as tested using strcmp_iw), and return
|
|
that first symbol, or NULL if there are no such symbols. */
|
|
|
|
extern struct symbol *block_iter_name_first (const struct block *block,
|
|
const char *name,
|
|
struct block_iterator *iterator);
|
|
|
|
/* Advance ITERATOR to point at the next symbol in BLOCK whose
|
|
SYMBOL_SEARCH_NAME is NAME (as tested using strcmp_iw), or NULL if
|
|
there are no more such symbols. Don't call this if you've
|
|
previously received NULL from block_iterator_first or
|
|
block_iterator_next on this iteration. And don't call it unless
|
|
ITERATOR was created by a previous call to block_iter_name_first
|
|
with the same NAME. */
|
|
|
|
extern struct symbol *block_iter_name_next (const char *name,
|
|
struct block_iterator *iterator);
|
|
|
|
/* Initialize ITERATOR to point at the first symbol in BLOCK whose
|
|
SYMBOL_SEARCH_NAME is NAME, as tested using COMPARE (which must use
|
|
the same conventions as strcmp_iw and be compatible with any
|
|
block hashing function), and return that first symbol, or NULL
|
|
if there are no such symbols. */
|
|
|
|
extern struct symbol *block_iter_match_first (const struct block *block,
|
|
const char *name,
|
|
symbol_compare_ftype *compare,
|
|
struct block_iterator *iterator);
|
|
|
|
/* Advance ITERATOR to point at the next symbol in BLOCK whose
|
|
SYMBOL_SEARCH_NAME is NAME, as tested using COMPARE (see
|
|
block_iter_match_first), or NULL if there are no more such symbols.
|
|
Don't call this if you've previously received NULL from
|
|
block_iterator_match_first or block_iterator_match_next on this
|
|
iteration. And don't call it unless ITERATOR was created by a
|
|
previous call to block_iter_match_first with the same NAME and COMPARE. */
|
|
|
|
extern struct symbol *block_iter_match_next (const char *name,
|
|
symbol_compare_ftype *compare,
|
|
struct block_iterator *iterator);
|
|
|
|
/* Search BLOCK for symbol NAME in DOMAIN. */
|
|
|
|
extern struct symbol *block_lookup_symbol (const struct block *block,
|
|
const char *name,
|
|
const domain_enum domain);
|
|
|
|
/* Search BLOCK for symbol NAME in DOMAIN but only in primary symbol table of
|
|
BLOCK. BLOCK must be STATIC_BLOCK or GLOBAL_BLOCK. Function is useful if
|
|
one iterates all global/static blocks of an objfile. */
|
|
|
|
extern struct symbol *block_lookup_symbol_primary (const struct block *block,
|
|
const char *name,
|
|
const domain_enum domain);
|
|
|
|
/* Macro to loop through all symbols in BLOCK, in no particular
|
|
order. ITER helps keep track of the iteration, and must be a
|
|
struct block_iterator. SYM points to the current symbol. */
|
|
|
|
#define ALL_BLOCK_SYMBOLS(block, iter, sym) \
|
|
for ((sym) = block_iterator_first ((block), &(iter)); \
|
|
(sym); \
|
|
(sym) = block_iterator_next (&(iter)))
|
|
|
|
/* Macro to loop through all symbols with name NAME in BLOCK,
|
|
in no particular order. ITER helps keep track of the iteration, and
|
|
must be a struct block_iterator. SYM points to the current symbol. */
|
|
|
|
#define ALL_BLOCK_SYMBOLS_WITH_NAME(block, name, iter, sym) \
|
|
for ((sym) = block_iter_name_first ((block), (name), &(iter)); \
|
|
(sym) != NULL; \
|
|
(sym) = block_iter_name_next ((name), &(iter)))
|
|
|
|
#endif /* BLOCK_H */
|