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| author | Martin Liska <mliska@suse.cz> | 2017-10-19 07:50:48 +0000 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2017-10-19 07:50:48 +0000 |
| commit | fb60f081fc7c8a030158611e1822b2a4fc02d15c (patch) | |
| tree | 87ee9450aa3646da62f0fd75175d108e225a9a2b /gcc/gimplify.c | |
| parent | 73d69770e1c279bd20e7c1604eb5e290cbc8c6b5 (diff) | |
Do not instrument use-after-scope for vars with large alignment (PR sanitizer/82517).
2017-10-19 Martin Liska <mliska@suse.cz>
PR sanitizer/82517
* gimplify.c (gimplify_decl_expr): Do not instrument variables
that have a large alignment.
(gimplify_target_expr): Likewise.
2017-10-19 Martin Liska <mliska@suse.cz>
PR sanitizer/82517
* gcc.dg/asan/pr82517.c: New test.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@253879 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gimplify.c')
| -rw-r--r-- | gcc/gimplify.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/gimplify.c b/gcc/gimplify.c index c3fd6ace84e..19411c98fce 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -1656,6 +1656,7 @@ gimplify_decl_expr (tree *stmt_p, gimple_seq *seq_p) && TREE_ADDRESSABLE (decl) && !TREE_STATIC (decl) && !DECL_HAS_VALUE_EXPR_P (decl) + && DECL_ALIGN (decl) <= MAX_SUPPORTED_STACK_ALIGNMENT && dbg_cnt (asan_use_after_scope)) { asan_poisoned_variables->add (decl); @@ -6505,7 +6506,9 @@ gimplify_target_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) clobber = build2 (MODIFY_EXPR, TREE_TYPE (temp), temp, clobber); gimple_push_cleanup (temp, clobber, false, pre_p, true); } - if (asan_poisoned_variables && dbg_cnt (asan_use_after_scope)) + if (asan_poisoned_variables + && DECL_ALIGN (temp) <= MAX_SUPPORTED_STACK_ALIGNMENT + && dbg_cnt (asan_use_after_scope)) { tree asan_cleanup = build_asan_poison_call_expr (temp); if (asan_cleanup) |