1 files changed, 48 insertions, 0 deletions
diff --git a/test/tsan/fiber_from_thread.cc b/test/tsan/fiber_from_thread.cc
new file mode 100644
index 000000000..a432eb039
--- /dev/null
+++ b/test/tsan/fiber_from_thread.cc
@@ -0,0 +1,48 @@
+// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+// UNSUPPORTED: tvos, watchos
+#include "sanitizer_common/sanitizer_ucontext.h"
+#include "test.h"
+
+char stack[64 * 1024] __attribute__((aligned(16)));
+
+ucontext_t uc, orig_uc1, orig_uc2;
+void *fiber, *orig_fiber1, *orig_fiber2;
+
+int var;
+
+void *Thread(void *x) {
+  orig_fiber2 = __tsan_get_current_fiber();
+  swapcontext(&orig_uc2, &orig_uc1);
+  return 0;
+}
+
+void func() {
+  pthread_t t;
+  pthread_create(&t, 0, Thread, 0);
+  pthread_join(t, 0);
+  __tsan_switch_to_fiber(orig_fiber1, 0);
+  swapcontext(&uc, &orig_uc1);
+}
+
+int main() {
+  orig_fiber1 = __tsan_get_current_fiber();
+  fiber = __tsan_create_fiber(0);
+  getcontext(&uc);
+  uc.uc_stack.ss_sp = stack;
+  uc.uc_stack.ss_size = sizeof(stack);
+  uc.uc_link = 0;
+  makecontext(&uc, func, 0);
+  var = 1;
+  __tsan_switch_to_fiber(fiber, 0);
+  swapcontext(&orig_uc1, &uc);
+  var = 2;
+  __tsan_switch_to_fiber(orig_fiber2, 0);
+  swapcontext(&orig_uc1, &orig_uc2);
+  var = 3;
+  __tsan_destroy_fiber(fiber);
+  fprintf(stderr, "PASS\n");
+  return 0;
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer:
+// CHECK: PASS