--- a/src/share/vm/runtime/thread.cpp	Tue Nov 19 17:44:26 2013 +0100
+++ b/src/share/vm/runtime/thread.cpp	Wed Nov 20 00:10:38 2013 +0100
@@ -1101,7 +1101,7 @@
 // General purpose hook into Java code, run once when the VM is initialized.
 // The Java library method itself may be changed independently from the VM.
 static void call_postVMInitHook(TRAPS) {
-  Klass* k = SystemDictionary::PostVMInitHook_klass();
+  Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD);
   instanceKlassHandle klass (THREAD, k);
   if (klass.not_null()) {
     JavaValue result(T_VOID);
@@ -1497,7 +1497,6 @@
   _interp_only_mode    = 0;
   _special_runtime_exit_condition = _no_async_condition;
   _pending_async_exception = NULL;
-  _is_compiling = false;
   _thread_stat = NULL;
   _thread_stat = new ThreadStatistics();
   _blocked_on_compilation = false;
@@ -1867,7 +1866,8 @@
     // Call Thread.exit(). We try 3 times in case we got another Thread.stop during
     // the execution of the method. If that is not enough, then we don't really care. Thread.stop
     // is deprecated anyhow.
-    { int count = 3;
+    if (!is_Compiler_thread()) {
+      int count = 3;
       while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) {
         EXCEPTION_MARK;
         JavaValue result(T_VOID);
@@ -1880,7 +1880,6 @@
         CLEAR_PENDING_EXCEPTION;
       }
     }
-
     // notify JVMTI
     if (JvmtiExport::should_post_thread_life()) {
       JvmtiExport::post_thread_end(this);
@@ -3296,12 +3295,26 @@
   _task  = NULL;
   _queue = queue;
   _counters = counters;
+  _buffer_blob = NULL;
+  _scanned_nmethod = NULL;
+  _compiler = NULL;
 
 #ifndef PRODUCT
   _ideal_graph_printer = NULL;
 #endif
 }
 
+void CompilerThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) {
+  JavaThread::oops_do(f, cld_f, cf);
+  if (_scanned_nmethod != NULL && cf != NULL) {
+    // Safepoints can occur when the sweeper is scanning an nmethod so
+    // process it here to make sure it isn't unloaded in the middle of
+    // a scan.
+    cf->do_code_blob(_scanned_nmethod);
+  }
+}
+
+
 // ======= Threads ========
 
 // The Threads class links together all active threads, and provides
@@ -3322,8 +3335,6 @@
 // All JavaThreads
 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next())
 
-void os_stream();
-
 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system)
 void Threads::threads_do(ThreadClosure* tc) {
   assert_locked_or_safepoint(Threads_lock);