[asan] add a test for use-after-return and exceptions and fix it. Not 100% sure this is a complete fix, will keep looking for harder cases.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190603 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/lib/asan/lit_tests/TestCases/uar_and_exceptions.cc b/lib/asan/lit_tests/TestCases/uar_and_exceptions.cc
new file mode 100644
index 00000000..f1639f08
--- /dev/null
+++ b/lib/asan/lit_tests/TestCases/uar_and_exceptions.cc
@@ -0,0 +1,27 @@
+// Test that use-after-return works with exceptions.
+// RUN: %clangxx_asan -fsanitize=use-after-return -O0 %s -o %t && %t
+
+#include <stdio.h>
+
+volatile char *g;
+
+void Func(int depth) {
+  char frame[100];
+  g = &frame[0];
+  if (depth)
+    Func(depth - 1);
+  else
+    throw 1;
+}
+
+int main(int argc, char **argv) {
+  for (int i = 0; i < 4000; i++) {
+    try {
+      Func(argc * 100);
+    } catch(...) {
+    }
+    if ((i % 1000) == 0)
+      fprintf(stderr, "done [%d]\n", i);
+  }
+  return 0;
+}