[ASan] Fix https://code.google.com/p/address-sanitizer/issues/detail?id=321 for time() and frexp()

Add a test for the frexp() interceptor.
Annotate the interceptors that may potentially corrupt stack IDs of freed buffers with FIXME comments.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@211153 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 0 deletions

diff --git a/test/asan/TestCases/frexp_interceptor.cc b/test/asan/TestCases/frexp_interceptor.cc
new file mode 100644
index 000000000..d75ba992b
--- /dev/null
+++ b/test/asan/TestCases/frexp_interceptor.cc
@@ -0,0 +1,16 @@
+// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
+
+// Test the frexp() interceptor.
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+int main() {
+  double x = 3.14;
+  int *exp = (int*)malloc(sizeof(int));
+  free(exp);
+  double y = frexp(x, exp);
+  // CHECK: use-after-free
+  // CHECK: SUMMARY
+  return 0;
+}