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Replace check_mul_overflow_size_t with __builtin_mul_overflow

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Checked on x86_64-linux-gnu and i686-linux-gnu.

	* malloc/alloc_buffer_alloc_array.c (__libc_alloc_buffer_alloc_array):
	Use __builtin_mul_overflow in place of check_mul_overflow_size_t.
	* malloc/dynarray_emplace_enlarge.c (__libc_dynarray_emplace_enlarge):
	Likewise.
	* malloc/dynarray_resize.c (__libc_dynarray_resize): Likewise.
	* malloc/reallocarray.c (__libc_reallocarray): Likewise.
	* malloc/malloc-internal.h (check_mul_overflow_size_t): Remove
	function.
	* support/blob_repeat.c (check_mul_overflow_size_t,
	(minimum_stride_size, support_blob_repeat_allocate): Likewise.
This commit is contained in:
Adhemerval Zanella
2018-12-21 09:49:37 -02:00
parent 09104e5ba4
commit 0253580a75
7 changed files with 21 additions and 53 deletions
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6
malloc/reallocarray.c
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@ -18,19 +18,17 @@
#include <errno.h>
#include <malloc.h>
#include <malloc/malloc-internal.h>
void *
__libc_reallocarray (void *optr, size_t nmemb, size_t elem_size)
{
size_t bytes;
if (check_mul_overflow_size_t (nmemb, elem_size, &bytes))
if (__builtin_mul_overflow (nmemb, elem_size, &bytes))
{
__set_errno (ENOMEM);
return 0;
}
else
return realloc (optr, bytes);
return realloc (optr, bytes);
}
libc_hidden_def (__libc_reallocarray)