1 files changed, 31 insertions, 0 deletions
diff --git a/compiler-rt/lib/asan/lit_tests/TestCases/free_hook_realloc.cc b/compiler-rt/lib/asan/lit_tests/TestCases/free_hook_realloc.cc
new file mode 100644
index 00000000000..92f5acd6dc8
--- /dev/null
+++ b/compiler-rt/lib/asan/lit_tests/TestCases/free_hook_realloc.cc
@@ -0,0 +1,31 @@
+// Check that free hook doesn't conflict with Realloc.
+// RUN: %clangxx_asan -O2 %s -o %t
+// RUN: %t 2>&1 | FileCheck %s
+#include <stdlib.h>
+#include <unistd.h>
+
+static void *glob_ptr;
+
+extern "C" {
+void __asan_free_hook(void *ptr) {
+  if (ptr == glob_ptr) {
+    *(int*)ptr = 0;
+    write(1, "FreeHook\n", sizeof("FreeHook\n"));
+  }
+}
+}
+
+int main() {
+  int *x = (int*)malloc(100);
+  x[0] = 42;
+  glob_ptr = x;
+  int *y = (int*)realloc(x, 200);
+  // Verify that free hook was called and didn't spoil the memory.
+  if (y[0] != 42) {
+    _exit(1);
+  }
+  write(1, "Passed\n", sizeof("Passed\n"));
+  // CHECK: FreeHook
+  // CHECK: Passed
+  return 0;
+}