66 int                             MemTracker::_sync_point_skip_count = 0;
  67 MemTracker::NMTLevel            MemTracker::_tracking_level = MemTracker::NMT_off;
  68 volatile MemTracker::NMTStates  MemTracker::_state = NMT_uninited;
  69 MemTracker::ShutdownReason      MemTracker::_reason = NMT_shutdown_none;
  70 int                             MemTracker::_thread_count = 255;
  71 volatile jint                   MemTracker::_pooled_recorder_count = 0;
  72 volatile unsigned long          MemTracker::_processing_generation = 0;
  73 volatile bool                   MemTracker::_worker_thread_idle = false;
  74 volatile jint                   MemTracker::_pending_op_count = 0;
  75 volatile bool                   MemTracker::_slowdown_calling_thread = false;
  76 debug_only(intx                 MemTracker::_main_thread_tid = 0;)
  77 NOT_PRODUCT(volatile jint       MemTracker::_pending_recorder_count = 0;)
  78 
  79 void MemTracker::init_tracking_options(const char* option_line) {
  80   _tracking_level = NMT_off;
  81   if (strcmp(option_line, "=summary") == 0) {
  82     _tracking_level = NMT_summary;
  83   } else if (strcmp(option_line, "=detail") == 0) {
  84     // detail relies on a stack-walking ability that may not
  85     // be available depending on platform and/or compiler flags
  86     if (PLATFORM_NMT_DETAIL_SUPPORTED) {
  87       _tracking_level = NMT_detail;
  88     } else {
  89       jio_fprintf(defaultStream::error_stream(),
  90         "NMT detail is not supported on this platform.  Using NMT summary instead.\n");
  91        _tracking_level = NMT_summary;
  92     }
  93   } else if (strcmp(option_line, "=off") != 0) {
  94     vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
  95   }
  96 }
  97 
  98 // first phase of bootstrapping, when VM is still in single-threaded mode.
  99 void MemTracker::bootstrap_single_thread() {
 100   if (_tracking_level > NMT_off) {
 101     assert(_state == NMT_uninited, "wrong state");
 102 
 103     // NMT is not supported with UseMallocOnly is on. NMT can NOT
 104     // handle the amount of malloc data without significantly impacting
 105     // runtime performance when this flag is on.
 106     if (UseMallocOnly) {
 107       shutdown(NMT_use_malloc_only);
 108       return;
 109     }
 110 
 111     _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock");
 112     if (_query_lock == NULL) {

  66 int                             MemTracker::_sync_point_skip_count = 0;
  67 MemTracker::NMTLevel            MemTracker::_tracking_level = MemTracker::NMT_off;
  68 volatile MemTracker::NMTStates  MemTracker::_state = NMT_uninited;
  69 MemTracker::ShutdownReason      MemTracker::_reason = NMT_shutdown_none;
  70 int                             MemTracker::_thread_count = 255;
  71 volatile jint                   MemTracker::_pooled_recorder_count = 0;
  72 volatile unsigned long          MemTracker::_processing_generation = 0;
  73 volatile bool                   MemTracker::_worker_thread_idle = false;
  74 volatile jint                   MemTracker::_pending_op_count = 0;
  75 volatile bool                   MemTracker::_slowdown_calling_thread = false;
  76 debug_only(intx                 MemTracker::_main_thread_tid = 0;)
  77 NOT_PRODUCT(volatile jint       MemTracker::_pending_recorder_count = 0;)
  78 
  79 void MemTracker::init_tracking_options(const char* option_line) {
  80   _tracking_level = NMT_off;
  81   if (strcmp(option_line, "=summary") == 0) {
  82     _tracking_level = NMT_summary;
  83   } else if (strcmp(option_line, "=detail") == 0) {
  84     // detail relies on a stack-walking ability that may not
  85     // be available depending on platform and/or compiler flags
  86 #if PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
  87       _tracking_level = NMT_detail;
  88 #else
  89       jio_fprintf(defaultStream::error_stream(),
  90         "NMT detail is not supported on this platform.  Using NMT summary instead.\n");
  91        _tracking_level = NMT_summary;
  92 #endif
  93   } else if (strcmp(option_line, "=off") != 0) {
  94     vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
  95   }
  96 }
  97 
  98 // first phase of bootstrapping, when VM is still in single-threaded mode.
  99 void MemTracker::bootstrap_single_thread() {
 100   if (_tracking_level > NMT_off) {
 101     assert(_state == NMT_uninited, "wrong state");
 102 
 103     // NMT is not supported with UseMallocOnly is on. NMT can NOT
 104     // handle the amount of malloc data without significantly impacting
 105     // runtime performance when this flag is on.
 106     if (UseMallocOnly) {
 107       shutdown(NMT_use_malloc_only);
 108       return;
 109     }
 110 
 111     _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock");
 112     if (_query_lock == NULL) {