# HG changeset patch
# User mgronlun
# Date 1382034480 -3600
# Node ID e9d1cc84d754851b42fd2226938137028af4aeec
# Parent  a34906833a8a2260446c253d52234c712dea3509
8023457: Event based tracing framework needs a mutex for thread groups
Reviewed-by: acorn, sla

diff -r a34906833a8a -r e9d1cc84d754 src/share/vm/runtime/mutexLocker.cpp
--- a/src/share/vm/runtime/mutexLocker.cpp	Sat Aug 24 00:14:46 2013 -0700
+++ b/src/share/vm/runtime/mutexLocker.cpp	Thu Oct 17 19:28:00 2013 +0100
@@ -134,12 +134,16 @@
 
 Mutex*   Management_lock              = NULL;
 Monitor* Service_lock                 = NULL;
-Mutex*   Stacktrace_lock              = NULL;
+Monitor* PeriodicTask_lock            = NULL;
 
+#ifdef INCLUDE_TRACE
 Monitor* JfrQuery_lock                = NULL;
+Mutex*   JfrStacktrace_lock           = NULL;
 Monitor* JfrMsg_lock                  = NULL;
 Mutex*   JfrBuffer_lock               = NULL;
 Mutex*   JfrStream_lock               = NULL;
+Mutex*   JfrThreadGroups_lock         = NULL;
+#endif
 
 #define MAX_NUM_MUTEX 128
 static Monitor * _mutex_array[MAX_NUM_MUTEX];
@@ -215,7 +219,6 @@
   def(Patching_lock                , Mutex  , special,     true ); // used for safepointing and code patching.
   def(ObjAllocPost_lock            , Monitor, special,     false);
   def(Service_lock                 , Monitor, special,     true ); // used for service thread operations
-  def(Stacktrace_lock              , Mutex,   special,     true ); // used for JFR stacktrace database
   def(JmethodIdCreation_lock       , Mutex  , leaf,        true ); // used for creating jmethodIDs.
 
   def(SystemDictionary_lock        , Monitor, leaf,        true ); // lookups done by VM thread
@@ -279,12 +282,18 @@
   def(Debug2_lock                  , Mutex  , nonleaf+4,   true );
   def(Debug3_lock                  , Mutex  , nonleaf+4,   true );
   def(ProfileVM_lock               , Monitor, nonleaf+4,   false); // used for profiling of the VMThread
-  def(CompileThread_lock           , Monitor, nonleaf+5,   false );
+  def(CompileThread_lock           , Monitor, nonleaf+5,   false);
+  def(PeriodicTask_lock            , Monitor, nonleaf+5,   true);
 
+#ifdef INCLUDE_TRACE
   def(JfrQuery_lock                , Monitor, nonleaf,     true);  // JFR locks, keep these in consecutive order
   def(JfrMsg_lock                  , Monitor, nonleaf+2,   true);
   def(JfrBuffer_lock               , Mutex,   nonleaf+3,   true);
+  def(JfrThreadGroups_lock         , Mutex,   nonleaf+1,   true);
   def(JfrStream_lock               , Mutex,   nonleaf+4,   true);
+  def(JfrStacktrace_lock           , Mutex,   special,     true );
+#endif
+
 }
 
 GCMutexLocker::GCMutexLocker(Monitor * mutex) {
diff -r a34906833a8a -r e9d1cc84d754 src/share/vm/runtime/mutexLocker.hpp
--- a/src/share/vm/runtime/mutexLocker.hpp	Sat Aug 24 00:14:46 2013 -0700
+++ b/src/share/vm/runtime/mutexLocker.hpp	Thu Oct 17 19:28:00 2013 +0100
@@ -136,12 +136,16 @@
 
 extern Mutex*   Management_lock;                 // a lock used to serialize JVM management
 extern Monitor* Service_lock;                    // a lock used for service thread operation
-extern Mutex*   Stacktrace_lock;                 // used to guard access to the stacktrace table
+extern Monitor* PeriodicTask_lock;               // protects the periodic task structure
 
+#ifdef INCLUDE_TRACE
+extern Mutex*   JfrStacktrace_lock;              // used to guard access to the JFR stacktrace table
 extern Monitor* JfrQuery_lock;                   // protects JFR use
 extern Monitor* JfrMsg_lock;                     // protects JFR messaging
 extern Mutex*   JfrBuffer_lock;                  // protects JFR buffer operations
 extern Mutex*   JfrStream_lock;                  // protects JFR stream access
+extern Mutex*   JfrThreadGroups_lock;            // protects JFR access to Thread Groups
+#endif
 
 // A MutexLocker provides mutual exclusion with respect to a given mutex
 // for the scope which contains the locker.  The lock is an OS lock, not