diff -r f41dad80f4e3 -r b0b41336a9a8 hotspot/src/share/vm/runtime/thread.cpp
--- a/hotspot/src/share/vm/runtime/thread.cpp	Tue Mar 01 09:42:19 2016 +0100
+++ b/hotspot/src/share/vm/runtime/thread.cpp	Tue Mar 01 23:46:09 2016 +0100
@@ -1694,7 +1694,7 @@
 
   EventThreadStart event;
   if (event.should_commit()) {
-    event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj()));
+    event.set_thread(THREAD_TRACE_ID(this));
     event.commit();
   }
 
@@ -1799,7 +1799,7 @@
     // from java_lang_Thread object
     EventThreadEnd event;
     if (event.should_commit()) {
-      event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj()));
+      event.set_thread(THREAD_TRACE_ID(this));
       event.commit();
     }
 
@@ -3554,6 +3554,10 @@
     return status;
   }
 
+  if (TRACE_INITIALIZE() != JNI_OK) {
+    vm_exit_during_initialization("Failed to initialize tracing backend");
+  }
+
   // Should be done after the heap is fully created
   main_thread->cache_global_variables();
 
@@ -3622,11 +3626,6 @@
 
   quicken_jni_functions();
 
-  // Must be run after init_ft which initializes ft_enabled
-  if (TRACE_INITIALIZE() != JNI_OK) {
-    vm_exit_during_initialization("Failed to initialize tracing backend");
-  }
-
   // No more stub generation allowed after that point.
   StubCodeDesc::freeze();