Fix asan infinite loop on undefined symbol

Fix llvm#39641

Differential Revision: https://reviews.llvm.org/D63877

llvm-svn: 366413

1 files changed, 42 insertions, 0 deletions

diff --git a/compiler-rt/test/asan/TestCases/Linux/dlopen-mixed-c-cxx.c b/compiler-rt/test/asan/TestCases/Linux/dlopen-mixed-c-cxx.c
new file mode 100644
index 00000000000..8bce907ef2e
--- /dev/null
+++ b/compiler-rt/test/asan/TestCases/Linux/dlopen-mixed-c-cxx.c
@@ -0,0 +1,42 @@
+// RUN: %clangxx_asan -xc++ -shared -fPIC -o %t.so - < %s
+// RUN: %clang_asan %s -o %t.out -ldl
+// RUN: ASAN_OPTIONS=verbosity=1 not %t.out %t.so 2>&1 | FileCheck %s
+//
+// CHECK: AddressSanitizer: failed to intercept '__cxa_throw'
+//
+// dlopen() can not be intercepted on Android
+// UNSUPPORTED: android
+#ifdef __cplusplus
+
+static void foo(void) {
+  int i = 0;
+  throw(i);
+}
+
+extern "C" {
+int bar(void);
+};
+int bar(void) {
+  try {
+    foo();
+  } catch (int i) {
+    return i;
+  }
+  return -1;
+}
+
+#else
+
+#include <assert.h>
+#include <dlfcn.h>
+
+int main(int argc, char **argv) {
+  int (*bar)(void);
+  void *handle = dlopen(argv[1], RTLD_LAZY);
+  assert(handle);
+  bar = dlsym(handle, "bar");
+  assert(bar);
+  return bar();
+}
+
+#endif