1 files changed, 41 insertions, 0 deletions
diff --git a/test/asan/TestCases/Linux/function-sections-are-bad.cc b/test/asan/TestCases/Linux/function-sections-are-bad.cc
new file mode 100644
index 000000000000..15aaccbc957f
--- /dev/null
+++ b/test/asan/TestCases/Linux/function-sections-are-bad.cc
@@ -0,0 +1,41 @@
+// Check that --gc-sections does not throw away (or localize) parts of sanitizer
+// interface.
+// RUN: %clang_asan %s -Wl,--gc-sections -ldl -o %t
+// RUN: %clang_asan %s -DBUILD_SO -fPIC -o %t-so.so -shared
+// RUN: %run %t 2>&1
+
+// REQUIRES: asan-64-bits
+
+#ifndef BUILD_SO
+#include <assert.h>
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[]) {
+  char path[4096];
+  snprintf(path, sizeof(path), "%s-so.so", argv[0]);
+
+  void *handle = dlopen(path, RTLD_LAZY);
+  if (!handle) fprintf(stderr, "%s\n", dlerror());
+  assert(handle != 0);
+
+  typedef void (*F)();
+  F f = (F)dlsym(handle, "call_rtl_from_dso");
+  printf("%s\n", dlerror());
+  assert(dlerror() == 0);
+  f();
+  
+  dlclose(handle);
+  return 0;
+}
+
+#else // BUILD_SO
+
+#include <sanitizer/asan_interface.h>
+extern "C" void call_rtl_from_dso() {
+  volatile int32_t x;
+  volatile int32_t y = __sanitizer_unaligned_load32((void *)&x);
+}
+
+#endif // BUILD_SO