hotspot/src/os/linux/vm/os_linux.cpp
changeset 23864 8af6bd3b1375
parent 23522 217a6a90aad3
child 23866 42d397967053
--- a/hotspot/src/os/linux/vm/os_linux.cpp	Wed Apr 02 16:08:59 2014 +0100
+++ b/hotspot/src/os/linux/vm/os_linux.cpp	Wed Apr 02 18:40:52 2014 +0200
@@ -1032,9 +1032,20 @@
 //////////////////////////////////////////////////////////////////////////////
 // thread local storage
 
+// Restore the thread pointer if the destructor is called. This is in case
+// someone from JNI code sets up a destructor with pthread_key_create to run
+// detachCurrentThread on thread death. Unless we restore the thread pointer we
+// will hang or crash. When detachCurrentThread is called the key will be set
+// to null and we will not be called again. If detachCurrentThread is never
+// called we could loop forever depending on the pthread implementation.
+static void restore_thread_pointer(void* p) {
+  Thread* thread = (Thread*) p;
+  os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
+}
+
 int os::allocate_thread_local_storage() {
   pthread_key_t key;
-  int rslt = pthread_key_create(&key, NULL);
+  int rslt = pthread_key_create(&key, restore_thread_pointer);
   assert(rslt == 0, "cannot allocate thread local storage");
   return (int)key;
 }