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Factor out the common code in lookup_{static,global}_symbol 

The two functions are extremely similar; this factors out their code into
a shared _internal function.

gdb/ChangeLog:

2019-08-26  Christian Biesinger  <cbiesinger@google.com>

	* symtab.c (lookup_static_symbol): Call the new function (and move
	it down to be next to lookup_global_symbol).
	(struct global_sym_lookup_data): Add block_enum member and rename to...
	(struct global_or_static_sym_lookup_data): ...this.
	(lookup_symbol_global_iterator_cb): Pass block_index instead of
	GLOBAL_BLOCK to lookup_symbol_in_objfile and rename to...
	(lookup_symbol_global_or_static_iterator_cb): ...this.
	(lookup_global_or_static_symbol): New function.
	(lookup_global_symbol): Call new function.
This commit is contained in:
Christian Biesinger 2019-08-02 19:59:37 -05:00
parent 5c31b35808
commit 9aa5520697
2 changed files with 57 additions and 57 deletions
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12
gdb/ChangeLog
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@ -1,3 +1,15 @@
2019-08-26 Christian Biesinger <cbiesinger@google.com>
* symtab.c (lookup_static_symbol): Call the new function (and move
it down to be next to lookup_global_symbol).
(struct global_sym_lookup_data): Add block_enum member and rename to...
(struct global_or_static_sym_lookup_data): ...this.
(lookup_symbol_global_iterator_cb): Pass block_index instead of
GLOBAL_BLOCK to lookup_symbol_in_objfile and rename to...
(lookup_symbol_global_or_static_iterator_cb): ...this.
(lookup_global_or_static_symbol): New function.
(lookup_global_symbol): Call new function.
2019-08-26 Tom de Vries <tdevries@suse.de>
PR c++/24852

102
gdb/symtab.c
View File

@ -2566,47 +2566,9 @@ lookup_symbol_in_objfile (struct objfile *objfile, enum block_enum block_index,
return result;
}
/* See symtab.h. */
struct block_symbol
lookup_static_symbol (const char *name, const domain_enum domain)
{
struct symbol_cache *cache = get_symbol_cache (current_program_space);
struct block_symbol result;
struct block_symbol_cache *bsc;
struct symbol_cache_slot *slot;
/* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
NULL for OBJFILE_CONTEXT. */
result = symbol_cache_lookup (cache, NULL, STATIC_BLOCK, name, domain,
&bsc, &slot);
if (result.symbol != NULL)
{
if (SYMBOL_LOOKUP_FAILED_P (result))
return {};
return result;
}
for (objfile *objfile : current_program_space->objfiles ())
{
result = lookup_symbol_in_objfile (objfile, STATIC_BLOCK, name, domain);
if (result.symbol != NULL)
{
/* Still pass NULL for OBJFILE_CONTEXT here. */
symbol_cache_mark_found (bsc, slot, NULL, result.symbol,
result.block);
return result;
}
}
/* Still pass NULL for OBJFILE_CONTEXT here. */
symbol_cache_mark_not_found (bsc, slot, NULL, name, domain);
return {};
}
/* Private data to be used with lookup_symbol_global_iterator_cb. */
struct global_sym_lookup_data
struct global_or_static_sym_lookup_data
{
/* The name of the symbol we are searching for. */
const char *name;
@ -2614,27 +2576,30 @@ struct global_sym_lookup_data
/* The domain to use for our search. */
domain_enum domain;
/* The block index in which to search. */
enum block_enum block_index;
/* The field where the callback should store the symbol if found.
It should be initialized to {NULL, NULL} before the search is started. */
struct block_symbol result;
};
/* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
It searches by name for a symbol in the GLOBAL_BLOCK of the given
OBJFILE. The arguments for the search are passed via CB_DATA,
which in reality is a pointer to struct global_sym_lookup_data. */
It searches by name for a symbol in the block given by BLOCK_INDEX of the
given OBJFILE. The arguments for the search are passed via CB_DATA, which
in reality is a pointer to struct global_or_static_sym_lookup_data. */
static int
lookup_symbol_global_iterator_cb (struct objfile *objfile,
void *cb_data)
lookup_symbol_global_or_static_iterator_cb (struct objfile *objfile,
void *cb_data)
{
struct global_sym_lookup_data *data =
(struct global_sym_lookup_data *) cb_data;
struct global_or_static_sym_lookup_data *data =
(struct global_or_static_sym_lookup_data *) cb_data;
gdb_assert (data->result.symbol == NULL
&& data->result.block == NULL);
data->result = lookup_symbol_in_objfile (objfile, GLOBAL_BLOCK,
data->result = lookup_symbol_in_objfile (objfile, data->block_index,
data->name, data->domain);
/* If we found a match, tell the iterator to stop. Otherwise,
@ -2642,25 +2607,28 @@ lookup_symbol_global_iterator_cb (struct objfile *objfile,
return (data->result.symbol != NULL);
}
/* See symtab.h. */
/* This function contains the common code of lookup_{global,static}_symbol.
OBJFILE is only used if BLOCK_INDEX is GLOBAL_SCOPE, in which case it is
the objfile to start the lookup in. */
struct block_symbol
lookup_global_symbol (const char *name,
const struct block *block,
const domain_enum domain)
static struct block_symbol
lookup_global_or_static_symbol (const char *name,
enum block_enum block_index,
struct objfile *objfile,
const domain_enum domain)
{
struct symbol_cache *cache = get_symbol_cache (current_program_space);
struct block_symbol result;
struct objfile *objfile;
struct global_sym_lookup_data lookup_data;
struct global_or_static_sym_lookup_data lookup_data;
struct block_symbol_cache *bsc;
struct symbol_cache_slot *slot;
objfile = lookup_objfile_from_block (block);
gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK);
gdb_assert (objfile == nullptr || block_index == GLOBAL_BLOCK);
/* First see if we can find the symbol in the cache.
This works because we use the current objfile to qualify the lookup. */
result = symbol_cache_lookup (cache, objfile, GLOBAL_BLOCK, name, domain,
result = symbol_cache_lookup (cache, objfile, block_index, name, domain,
&bsc, &slot);
if (result.symbol != NULL)
{
@ -2678,10 +2646,11 @@ lookup_global_symbol (const char *name,
{
memset (&lookup_data, 0, sizeof (lookup_data));
lookup_data.name = name;
lookup_data.block_index = block_index;
lookup_data.domain = domain;
gdbarch_iterate_over_objfiles_in_search_order
(objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (),
lookup_symbol_global_iterator_cb, &lookup_data, objfile);
lookup_symbol_global_or_static_iterator_cb, &lookup_data, objfile);
result = lookup_data.result;
}
@ -2693,6 +2662,25 @@ lookup_global_symbol (const char *name,
return result;
}
/* See symtab.h. */
struct block_symbol
lookup_static_symbol (const char *name, const domain_enum domain)
{
return lookup_global_or_static_symbol (name, STATIC_BLOCK, nullptr, domain);
}
/* See symtab.h. */
struct block_symbol
lookup_global_symbol (const char *name,
const struct block *block,
const domain_enum domain)
{
struct objfile *objfile = lookup_objfile_from_block (block);
return lookup_global_or_static_symbol (name, GLOBAL_BLOCK, objfile, domain);
}
int
symbol_matches_domain (enum language symbol_language,
domain_enum symbol_domain,