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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-04-05 13:17:15 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-04-05 13:17:15 +0000 |
| commit | 6dc833787d9293dfc04cf56f02ac27ffaf2b4b99 (patch) | |
| tree | 6423301157ac4961d6e04ab24b1d64431a50dfac /gcc/asan.c | |
| parent | 3c342e7564a0f8d907a2cf9007afa10c190791af (diff) | |
| download | gcc-6dc833787d9293dfc04cf56f02ac27ffaf2b4b99.tar.gz | |
PR sanitizer/80308
* asan.c (asan_store_shadow_bytes): Fix location of last_chunk_value
for big endian.
* c-c++-common/asan/pr80308.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@246703 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/asan.c')
| -rw-r--r-- | gcc/asan.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/asan.c b/gcc/asan.c index f1098cbffac..bf564a46b28 100644 --- a/gcc/asan.c +++ b/gcc/asan.c @@ -2757,10 +2757,13 @@ asan_store_shadow_bytes (gimple_stmt_iterator *iter, location_t loc, unsigned char c = (char) is_clobber ? ASAN_STACK_MAGIC_USE_AFTER_SCOPE : 0; unsigned HOST_WIDE_INT val = 0; + unsigned last_pos = size; + if (last_chunk_size && !is_clobber) + last_pos = BYTES_BIG_ENDIAN ? 0 : size - 1; for (unsigned i = 0; i < size; ++i) { unsigned char shadow_c = c; - if (i == size - 1 && last_chunk_size && !is_clobber) + if (i == last_pos) shadow_c = last_chunk_size; val |= (unsigned HOST_WIDE_INT) shadow_c << (BITS_PER_UNIT * i); } |