asan: improve allocator benchmark

llvm-svn: 172213

1 files changed, 1 insertions, 0 deletions

diff --git a/compiler-rt/lib/sanitizer_common/tests/standalone_malloc_test.cc b/compiler-rt/lib/sanitizer_common/tests/standalone_malloc_test.cc
index 43148605a18..455c98d3dee 100644
--- a/compiler-rt/lib/sanitizer_common/tests/standalone_malloc_test.cc
+++ b/compiler-rt/lib/sanitizer_common/tests/standalone_malloc_test.cc
@@ -34,6 +34,7 @@ static void *MallocThread(void *t) {
       if (allocated.empty()) continue;
       size_t slot = i % allocated.size();
       char *p = allocated[slot].first;
+      p[0] = 0;  // emulate last user touch of the block
       size_t size = allocated[slot].second;
       total_freed += size;
       swap(allocated[slot], allocated.back());