[asan] add a run-time flag detect_container_overflow=true/false

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@206753 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/asan/asan_poisoning.cc b/lib/asan/asan_poisoning.cc
index f75ac0a4e..a545769bd 100644
--- a/lib/asan/asan_poisoning.cc
+++ b/lib/asan/asan_poisoning.cc
@@ -266,6 +266,7 @@ void __sanitizer_annotate_contiguous_container(const void *beg_p,
                                                const void *end_p,
                                                const void *old_mid_p,
                                                const void *new_mid_p) {
+  if (!flags()->detect_container_overflow) return;
   VPrintf(2, "contiguous_container: %p %p %p %p\n", beg_p, end_p, old_mid_p,
           new_mid_p);
   uptr beg = reinterpret_cast<uptr>(beg_p);