--- a/src/os/bsd/vm/os_bsd.cpp	Mon Aug 26 09:45:45 2013 -0700
+++ b/src/os/bsd/vm/os_bsd.cpp	Mon Aug 26 09:47:55 2013 -0700
@@ -971,13 +971,14 @@
 #endif
 
 #ifdef __APPLE__
-static uint64_t locate_unique_thread_id() {
+static uint64_t locate_unique_thread_id(mach_port_t mach_thread_port) {
   // Additional thread_id used to correlate threads in SA
   thread_identifier_info_data_t     m_ident_info;
   mach_msg_type_number_t            count = THREAD_IDENTIFIER_INFO_COUNT;
 
-  thread_info(::mach_thread_self(), THREAD_IDENTIFIER_INFO,
+  thread_info(mach_thread_port, THREAD_IDENTIFIER_INFO,
               (thread_info_t) &m_ident_info, &count);
+
   return m_ident_info.thread_id;
 }
 #endif
@@ -1009,9 +1010,14 @@
 
 #ifdef _ALLBSD_SOURCE
 #ifdef __APPLE__
-  // thread_id is mach thread on macos
-  osthread->set_thread_id(::mach_thread_self());
-  osthread->set_unique_thread_id(locate_unique_thread_id());
+  // thread_id is mach thread on macos, which pthreads graciously caches and provides for us
+  mach_port_t thread_id = ::pthread_mach_thread_np(::pthread_self());
+  guarantee(thread_id != 0, "thread id missing from pthreads");
+  osthread->set_thread_id(thread_id);
+
+  uint64_t unique_thread_id = locate_unique_thread_id(thread_id);
+  guarantee(unique_thread_id != 0, "unique thread id was not found");
+  osthread->set_unique_thread_id(unique_thread_id);
 #else
   // thread_id is pthread_id on BSD
   osthread->set_thread_id(::pthread_self());
@@ -1207,8 +1213,14 @@
   // Store pthread info into the OSThread
 #ifdef _ALLBSD_SOURCE
 #ifdef __APPLE__
-  osthread->set_thread_id(::mach_thread_self());
-  osthread->set_unique_thread_id(locate_unique_thread_id());
+  // thread_id is mach thread on macos, which pthreads graciously caches and provides for us
+  mach_port_t thread_id = ::pthread_mach_thread_np(::pthread_self());
+  guarantee(thread_id != 0, "just checking");
+  osthread->set_thread_id(thread_id);
+
+  uint64_t unique_thread_id = locate_unique_thread_id(thread_id);
+  guarantee(unique_thread_id != 0, "just checking");
+  osthread->set_unique_thread_id(unique_thread_id);
 #else
   osthread->set_thread_id(::pthread_self());
 #endif
@@ -1830,7 +1842,7 @@
 
 intx os::current_thread_id() {
 #ifdef __APPLE__
-  return (intx)::mach_thread_self();
+  return (intx)::pthread_mach_thread_np(::pthread_self());
 #else
   return (intx)::pthread_self();
 #endif

--- a/src/share/vm/runtime/mutexLocker.cpp	Mon Aug 26 09:45:45 2013 -0700
+++ b/src/share/vm/runtime/mutexLocker.cpp	Mon Aug 26 09:47:55 2013 -0700
@@ -133,13 +133,15 @@
 
 Mutex*   Management_lock              = NULL;
 Monitor* Service_lock                 = NULL;
-Mutex*   Stacktrace_lock              = NULL;
+Monitor* PeriodicTask_lock            = NULL;
 
-Monitor* JfrQuery_lock                = NULL;
+#ifdef INCLUDE_TRACE
+Mutex*   JfrStacktrace_lock           = NULL;
 Monitor* JfrMsg_lock                  = NULL;
 Mutex*   JfrBuffer_lock               = NULL;
 Mutex*   JfrStream_lock               = NULL;
-Monitor* PeriodicTask_lock            = NULL;
+Mutex*   JfrThreadGroups_lock         = NULL;
+#endif
 
 #define MAX_NUM_MUTEX 128
 static Monitor * _mutex_array[MAX_NUM_MUTEX];
@@ -215,7 +217,6 @@
   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
@@ -278,12 +279,17 @@
   def(MethodCompileQueue_lock      , Monitor, nonleaf+4,   true );
   def(Debug2_lock                  , Mutex  , nonleaf+4,   true );
   def(Debug3_lock                  , Mutex  , nonleaf+4,   true );
-  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(JfrMsg_lock                  , Monitor, leaf,        true);
   def(JfrBuffer_lock               , Mutex,   nonleaf+1,   true);
+  def(JfrThreadGroups_lock         , Mutex,   nonleaf+1,   true);
   def(JfrStream_lock               , Mutex,   nonleaf+2,   true);
-  def(PeriodicTask_lock            , Monitor, nonleaf+5,   true);
+  def(JfrStacktrace_lock           , Mutex,   special,     true );
+#endif
+
 }
 
 GCMutexLocker::GCMutexLocker(Monitor * mutex) {

--- a/src/share/vm/runtime/mutexLocker.hpp	Mon Aug 26 09:45:45 2013 -0700
+++ b/src/share/vm/runtime/mutexLocker.hpp	Mon Aug 26 09:47:55 2013 -0700
@@ -135,13 +135,15 @@
 
 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
 
-extern Monitor* JfrQuery_lock;                   // protects JFR use
+#ifdef INCLUDE_TRACE
+extern Mutex*   JfrStacktrace_lock;              // used to guard access to the JFR stacktrace table
 extern Monitor* JfrMsg_lock;                     // protects JFR messaging
 extern Mutex*   JfrBuffer_lock;                  // protects JFR buffer operations
 extern Mutex*   JfrStream_lock;                  // protects JFR stream access
-extern Monitor* PeriodicTask_lock;               // protects the periodic task structure
+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