[hwasan] properly report heap-buffer-overflow

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@341159 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 0 deletions

diff --git a/test/hwasan/TestCases/heap-buffer-overflow.c b/test/hwasan/TestCases/heap-buffer-overflow.c
new file mode 100644
index 000000000..36c09b294
--- /dev/null
+++ b/test/hwasan/TestCases/heap-buffer-overflow.c
@@ -0,0 +1,16 @@
+// RUN: %clang_hwasan  %s -o %t && not %run %t 2>&1 | FileCheck %s
+
+// REQUIRES: stable-runtime
+// TODO: test more cases.
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sanitizer/hwasan_interface.h>
+
+int main() {
+  __hwasan_enable_allocator_tagging();
+  char * volatile x = (char*)malloc(30);
+  x[40] = 42;
+// CHECK: is located 10 bytes to the right of 30-byte region
+  free(x);
+}