Index: lib/asan/asan_posix.cc
===================================================================
--- lib/asan/asan_posix.cc
+++ lib/asan/asan_posix.cc
@@ -40,31 +40,43 @@
 
 // ---------------------- TSD ---------------- {{{1
 
-static pthread_key_t tsd_key;
+static __thread void *tsd_data;
+static __thread void (*tsd_dst)(void *tsd) = nullptr;
 static bool tsd_key_inited = false;
+
+void AsanTSDExit(void) {
+  AsanThreadContext *context = (AsanThreadContext *)tsd_data;
+  if (context->destructor_iterations > 1) {
+    context->destructor_iterations--;
+    return;
+  }
+
+  if (tsd_dst)
+    tsd_dst(tsd_data);
+}
+
 void AsanTSDInit(void (*destructor)(void *tsd)) {
   CHECK(!tsd_key_inited);
   tsd_key_inited = true;
-  CHECK_EQ(0, pthread_key_create(&tsd_key, destructor));
+  size_t dit = GetPthreadDestructorIterations();
+  for (size_t i = 0; i < dit; i ++)
+    Atexit(AsanTSDExit);
+  tsd_data = nullptr;
+  tsd_dst = destructor;
+  
 }
 
 void *AsanTSDGet() {
   CHECK(tsd_key_inited);
-  return pthread_getspecific(tsd_key);
+  return tsd_data;
 }
 
 void AsanTSDSet(void *tsd) {
   CHECK(tsd_key_inited);
-  pthread_setspecific(tsd_key, tsd);
+  tsd_data = tsd;
 }
 
 void PlatformTSDDtor(void *tsd) {
-  AsanThreadContext *context = (AsanThreadContext*)tsd;
-  if (context->destructor_iterations > 1) {
-    context->destructor_iterations--;
-    CHECK_EQ(0, pthread_setspecific(tsd_key, tsd));
-    return;
-  }
   AsanThread::TSDDtor(tsd);
 }
 }  // namespace __asan