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* sysdeps/generic/dl-tls.c (_dl_allocate_tls_storage): Allocate the

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TCB with __libc_memalign instead of mmap.
	(_dl_deallocate_tls): Free it with free instad of munmap.
This commit is contained in:
Roland McGrath 2002-08-05 01:28:17 +00:00
parent a816b435dd
commit a4dda453b8
2 changed files with 10 additions and 15 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2002-08-04 Roland McGrath <roland@redhat.com>
* sysdeps/generic/dl-tls.c (_dl_allocate_tls_storage): Allocate the
TCB with __libc_memalign instead of mmap.
(_dl_deallocate_tls): Free it with free instad of munmap.
* Makerules (cpp-srcs-left): When setting this to run
cppflags-iterator.mk, must append .c to $(tests) and $(xtests)
words. Combine the two loops into one on the concatenated list,

21
sysdeps/generic/dl-tls.c
View File

@ -205,25 +205,16 @@ _dl_allocate_tls_storage (void)
size_t dtv_length;
/* Allocate a correctly aligned chunk of memory. */
/* XXX For now */
assert (GL(dl_tls_static_align) <= GL(dl_pagesize));
# ifdef MAP_ANON
# define _dl_zerofd (-1)
# else
# define _dl_zerofd GL(dl_zerofd)
if ((dl_zerofd) == -1)
GL(dl_zerofd) = _dl_sysdep_open_zero_fill ();
# define MAP_ANON 0
# endif
result = __mmap (0, GL(dl_tls_static_size) ?: 1, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, _dl_zerofd, 0);
result = __libc_memalign (GL(dl_tls_static_align), GL(dl_tls_static_size));
if (__builtin_expect (result == NULL, 0))
return result;
/* We allocate a few more elements in the dtv than are needed for the
initial set of modules. This should avoid in most cases expansions
of the dtv. */
dtv_length = GL(dl_tls_max_dtv_idx) + DTV_SURPLUS;
dtv = (dtv_t *) malloc ((dtv_length + 2) * sizeof (dtv_t));
if (result != MAP_FAILED && dtv != NULL)
if (dtv != NULL)
{
# if TLS_TCB_AT_TP
/* The TCB follows the TLS blocks. */
@ -241,7 +232,7 @@ _dl_allocate_tls_storage (void)
/* Add the dtv to the thread data structures. */
INSTALL_DTV (result, dtv);
}
else if (result != NULL)
else
{
free (result);
result = NULL;
@ -335,7 +326,7 @@ _dl_deallocate_tls (void *tcb)
/* The array starts with dtv[-1]. */
free (dtv - 1);
munmap (tcb, GL(dl_tls_static_size));
free (tcb);
}