8307156: native_thread not protected by TLH

Reviewed-by: phh, mgronlun
Backport-of: 0c6529d2d38a668f74936cca7803ca9de1a05d49

Author: shipilev

src/hotspot/share/jfr/jni/jfrJavaSupport.cpp

@@ -726,20 +726,21 @@ static bool check_exclusion_state_on_thread_start(JavaThread* jt) {
   return true;
 }
 
-static JavaThread* get_native(jobject thread) {
-  ThreadsListHandle tlh;
+static JavaThread* get_native(ThreadsListHandle& tlh, jobject thread) {
   JavaThread* native_thread = NULL;
   (void)tlh.cv_internal_thread_to_JavaThread(thread, &native_thread, NULL);
   return native_thread;
 }
 
 jlong JfrJavaSupport::jfr_thread_id(jobject thread) {
-  JavaThread* native_thread = get_native(thread);
+  ThreadsListHandle tlh;
+  JavaThread* native_thread = get_native(tlh, thread);
   return native_thread != NULL ? JFR_THREAD_ID(native_thread) : 0;
 }
 
 void JfrJavaSupport::exclude(jobject thread) {
-  JavaThread* native_thread = get_native(thread);
+  ThreadsListHandle tlh;
+  JavaThread* native_thread = get_native(tlh, thread);
   if (native_thread != NULL) {
     JfrThreadLocal::exclude(native_thread);
   } else {
@@ -749,7 +750,8 @@ void JfrJavaSupport::exclude(jobject thread) {
 }
 
 void JfrJavaSupport::include(jobject thread) {
-  JavaThread* native_thread = get_native(thread);
+  ThreadsListHandle tlh;
+  JavaThread* native_thread = get_native(tlh, thread);
   if (native_thread != NULL) {
     JfrThreadLocal::include(native_thread);
   } else {
@@ -759,7 +761,8 @@ void JfrJavaSupport::include(jobject thread) {
 }
 
 bool JfrJavaSupport::is_excluded(jobject thread) {
-  JavaThread* native_thread = get_native(thread);
+  ThreadsListHandle tlh;
+  JavaThread* native_thread = get_native(tlh, thread);
   return native_thread != NULL ? native_thread->jfr_thread_local()->is_excluded() : is_thread_excluded(thread);
 }