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Convert elfread.c to type-safe registry API 

This changes elfread.c to use the type-safe registry API.  This also
fixes a potential memory leak, by changing the hash table so that it
is no longer allocated on an obstack.

gdb/ChangeLog
2019-05-08  Tom Tromey  <tom@tromey.com>

	* elfread.c (elf_objfile_gnu_ifunc_cache_data): Change type.
	(elf_gnu_ifunc_record_cache): Update.  Don't allocate hash table
	on obstack.
	(elf_gnu_ifunc_resolve_by_cache, _initialize_elfread): Update.
This commit is contained in:
Tom Tromey 2019-05-01 15:41:13 -06:00
parent 91d3055d8b
commit 8127a2fab5
2 changed files with 15 additions and 10 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2019-05-08 Tom Tromey <tom@tromey.com>
* elfread.c (elf_objfile_gnu_ifunc_cache_data): Change type.
(elf_gnu_ifunc_record_cache): Update. Don't allocate hash table
on obstack.
(elf_gnu_ifunc_resolve_by_cache, _initialize_elfread): Update.
2019-05-08 Tom Tromey <tom@tromey.com>
* mdebugread.c (basic_type_data): Change type.

18
gdb/elfread.c
View File

@ -639,7 +639,8 @@ elf_rel_plt_read (minimal_symbol_reader &reader,
/* The data pointer is htab_t for gnu_ifunc_record_cache_unchecked. */
static const struct objfile_data *elf_objfile_gnu_ifunc_cache_data;
static const struct objfile_key<htab, htab_deleter>
elf_objfile_gnu_ifunc_cache_data;
/* Map function names to CORE_ADDR in elf_objfile_gnu_ifunc_cache_data. */
@ -710,15 +711,13 @@ elf_gnu_ifunc_record_cache (const char *name, CORE_ADDR addr)
if (len > 4 && strcmp (target_name + len - 4, "@plt") == 0)
return 0;
htab = (htab_t) objfile_data (objfile, elf_objfile_gnu_ifunc_cache_data);
htab = elf_objfile_gnu_ifunc_cache_data.get (objfile);
if (htab == NULL)
{
htab = htab_create_alloc_ex (1, elf_gnu_ifunc_cache_hash,
elf_gnu_ifunc_cache_eq,
NULL, &objfile->objfile_obstack,
hashtab_obstack_allocate,
dummy_obstack_deallocate);
set_objfile_data (objfile, elf_objfile_gnu_ifunc_cache_data, htab);
htab = htab_create_alloc (1, elf_gnu_ifunc_cache_hash,
elf_gnu_ifunc_cache_eq,
NULL, xcalloc, xfree);
elf_objfile_gnu_ifunc_cache_data.set (objfile, htab);
}
entry_local.addr = addr;
@ -769,7 +768,7 @@ elf_gnu_ifunc_resolve_by_cache (const char *name, CORE_ADDR *addr_p)
struct elf_gnu_ifunc_cache *entry_p;
void **slot;
htab = (htab_t) objfile_data (objfile, elf_objfile_gnu_ifunc_cache_data);
htab = elf_objfile_gnu_ifunc_cache_data.get (objfile);
if (htab == NULL)
continue;
@ -1462,6 +1461,5 @@ _initialize_elfread (void)
{
add_symtab_fns (bfd_target_elf_flavour, &elf_sym_fns);
elf_objfile_gnu_ifunc_cache_data = register_objfile_data ();
gnu_ifunc_fns_p = &elf_gnu_ifunc_fns;
}