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authorRoland McGrath <roland@gnu.org>2002-12-06 11:15:07 +0000
committerRoland McGrath <roland@gnu.org>2002-12-06 11:15:07 +0000
commitfde89ad0091e492bd2d99d9d4925fbd62a7dc643 (patch)
treea3463d94ac501cf65556a614a54a66b64cfaf1ad /elf/dl-minimal.c
parentd58847f9529bd81ff603e3a2beff7c6306165dac (diff)
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* sysdeps/generic/libc-tls.c (__libc_setup_tls): Cope with zero ALIGN.
* malloc/hooks.c [_LIBC && (USE___THREAD || (USE_TLS && !SHARED))] (malloc_starter, memalign_starter, free_starter): Don't define these. * malloc/malloc.c [_LIBC && (USE___THREAD || (USE_TLS && !SHARED))]: Don't declare them either. * malloc/arena.c (ptmalloc_init) [_LIBC && USE_TLS]: Don't call __pthread_initialize, so no need to set hooks to *_starter. (ptmalloc_init_minimal): New function, broken out of ptmalloc_init. [_LIBC && SHARED && USE_TLS && !USE___THREAD] (__libc_malloc_pthread_startup): New function. * malloc/Versions (libc: GLIBC_PRIVATE): New set, add that function. * malloc/hooks.c (memalign_starter): New function. * malloc/malloc.c: Declare it. * malloc/arena.c (save_memalign_hook): New variable. (ptmalloc_init): Set __memalign_hook to memalign_starter. * elf/dl-minimal.c (free): Clear the memory. (calloc): Just call malloc, knowing all memory it returns is cleared. * sysdeps/generic/dl-tls.c (allocate_dtv): Use calloc instead of malloc and memset; calloc can avoid the zeroing when redundant. (_dl_tls_setup): Likewise. * elf/dl-load.c (decompose_rpath): Likewise. * sysdeps/generic/libc-tls.c (__libc_setup_tls): Comment out memset call, since memory from sbrk at startup is already zero. * elf/rtld.c (_dl_start, dl_main): TLS_INIT_TP macro now returns an error string for failure, null for success. Update callers. * sysdeps/generic/libc-tls.c (__libc_setup_tls): Likewise. * elf/dl-load.c (_dl_map_object_from_fd): Likewise.
Diffstat (limited to 'elf/dl-minimal.c')
-rw-r--r--elf/dl-minimal.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/elf/dl-minimal.c b/elf/dl-minimal.c
index d1619cf..3a51df3 100644
--- a/elf/dl-minimal.c
+++ b/elf/dl-minimal.c
@@ -104,9 +104,10 @@ malloc (size_t n)
void * weak_function
calloc (size_t nmemb, size_t size)
{
- size_t total = nmemb * size;
- void *result = malloc (total);
- return memset (result, '\0', total);
+ /* New memory from the trivial malloc above is always already cleared.
+ (We make sure that's true in the rare occasion it might not be,
+ by clearing memory in free, below.) */
+ return malloc (nmemb * size);
}
/* This will rarely be called. */
@@ -115,7 +116,12 @@ free (void *ptr)
{
/* We can free only the last block allocated. */
if (ptr == alloc_last_block)
- alloc_ptr = alloc_last_block;
+ {
+ /* Since this is rare, we clear the freed block here
+ so that calloc can presume malloc returns cleared memory. */
+ memset (alloc_last_block, '\0', alloc_ptr - alloc_last_block);
+ alloc_ptr = alloc_last_block;
+ }
}
/* This is only called with the most recent block returned by malloc. */