[test][sanitizer] Add stress test for pthread_create

diff --git a/compiler-rt/test/sanitizer_common/TestCases/Posix/create_thread_loop.cpp b/compiler-rt/test/sanitizer_common/TestCases/Posix/create_thread_loop.cpp
new file mode 100644 (file)
index 0000000..0248564
--- /dev/null
+++ b/compiler-rt/test/sanitizer_common/TestCases/Posix/create_thread_loop.cpp
@@ -0,0 +1,23 @@
+// Simple stress test for of pthread_create. Increase arg to use as benchmark.
+
+// RUN: %clangxx -O3 -pthread %s -o %t && %run %t 1000
+
+#include <pthread.h>
+#include <stdlib.h>
+
+extern "C" const char *__asan_default_options() {
+  // 32bit asan can allocate just a few FakeStacks.
+  return sizeof(void *) < 8 ? "detect_stack_use_after_return=0" : "";
+}
+
+static void *null_func(void *args) { return nullptr; }
+
+int main(int argc, char **argv) {
+  int n = atoi(argv[1]);
+  for (int i = 0; i < n; ++i) {
+    pthread_t thread;
+    pthread_create(&thread, 0, null_func, NULL);
+    pthread_detach(thread);
+  }
+  return 0;
+}