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re PR sanitizer/70712 (False positive from AddressSanitizer with use of 'alignas')

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PR sanitizer/70712
	* cfgexpand.c (expand_stack_vars): Fix typo.

	* c-c++-common/asan/pr70712.c: New test.

From-SVN: r235384
This commit is contained in:
Jakub Jelinek 2016-04-23 07:28:16 +02:00 committed by Jakub Jelinek
parent 0e94da57dc
commit d6c1a7a7c7
4 changed files with 43 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-04-23 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/70712
* cfgexpand.c (expand_stack_vars): Fix typo.
2016-04-22 Szabolcs Nagy <szabolcs.nagy@arm.com>
* system.h (list, map, set, vector): Include conditionally.

2
gcc/cfgexpand.c
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@ -1137,7 +1137,7 @@ expand_stack_vars (bool (*pred) (size_t), struct stack_vars_data *data)
HOST_WIDE_INT prev_offset
= align_base (frame_offset,
MAX (alignb, ASAN_RED_ZONE_SIZE),
FRAME_GROWS_DOWNWARD);
!FRAME_GROWS_DOWNWARD);
tree repr_decl = NULL_TREE;
offset
= alloc_stack_frame_space (stack_vars[i].size

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-04-23 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/70712
* c-c++-common/asan/pr70712.c: New test.
2016-04-22 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* .gitattributes: New file.

32
gcc/testsuite/c-c++-common/asan/pr70712.c Normal file
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@ -0,0 +1,32 @@
/* PR sanitizer/70712 */
/* { dg-do run } */
struct __attribute__((aligned (64))) S
{
char s[4];
};
struct T
{
char t[8];
char u[480];
};
__attribute__((noinline, noclone)) void
foo (struct T *p, struct S *q)
{
__builtin_memset (p->t, '\0', sizeof (p->t));
__builtin_memset (p->u, '\0', sizeof (p->u));
__builtin_memset (q->s, '\0', sizeof (q->s));
}
int
main ()
{
struct S s;
struct T t;
foo (&t, &s);
asm volatile ("" : : "r" (&t), "r" (&s) : "memory");
return 0;
}