Merge
This commit is contained in:
Coleen Phillimore
commit
f860133cc4
@ -1,5 +1,5 @@
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/*
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* Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -81,7 +81,9 @@ class ParkEvent ;
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// *in that order*. If their implementations change such that these
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// assumptions are violated, a whole lot of code will break.
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// The default length of monitor name is chosen to be 64 to avoid false sharing.
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// The default length of monitor name was originally chosen to be 64 to avoid
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// false sharing. Now, PaddedMonitor is available for this purpose.
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// TODO: Check if _name[MONITOR_NAME_LEN] should better get replaced by const char*.
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static const int MONITOR_NAME_LEN = 64;
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class Monitor : public CHeapObj<mtInternal> {
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@ -254,6 +256,18 @@ class Monitor : public CHeapObj<mtInternal> {
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};
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class PaddedMonitor : public Monitor {
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enum {
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CACHE_LINE_PADDING = (int)DEFAULT_CACHE_LINE_SIZE - (int)sizeof(Monitor),
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PADDING_LEN = CACHE_LINE_PADDING > 0 ? CACHE_LINE_PADDING : 1
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};
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char _padding[PADDING_LEN];
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public:
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PaddedMonitor(int rank, const char *name, bool allow_vm_block = false,
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SafepointCheckRequired safepoint_check_required = _safepoint_check_always) :
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Monitor(rank, name, allow_vm_block, safepoint_check_required) {};
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};
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// Normally we'd expect Monitor to extend Mutex in the sense that a monitor
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// constructed from pthreads primitives might extend a mutex by adding
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// a condvar and some extra metadata. In fact this was the case until J2SE7.
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@ -292,5 +306,16 @@ class Mutex : public Monitor { // degenerate Monitor
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}
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};
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class PaddedMutex : public Mutex {
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enum {
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CACHE_LINE_PADDING = (int)DEFAULT_CACHE_LINE_SIZE - (int)sizeof(Mutex),
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PADDING_LEN = CACHE_LINE_PADDING > 0 ? CACHE_LINE_PADDING : 1
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};
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char _padding[PADDING_LEN];
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public:
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PaddedMutex(int rank, const char *name, bool allow_vm_block = false,
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SafepointCheckRequired safepoint_check_required = _safepoint_check_always) :
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Mutex(rank, name, allow_vm_block, safepoint_check_required) {};
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};
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#endif // SHARE_VM_RUNTIME_MUTEX_HPP
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@ -169,122 +169,123 @@ void assert_lock_strong(const Monitor * lock) {
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_mutex_array[_num_mutex++] = var; \
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}
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// Using Padded subclasses to prevent false sharing of these global monitors and mutexes.
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void mutex_init() {
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def(tty_lock , Mutex , event, true, Monitor::_safepoint_check_never); // allow to lock in VM
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def(tty_lock , PaddedMutex , event, true, Monitor::_safepoint_check_never); // allow to lock in VM
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def(CGC_lock , Monitor, special, true, Monitor::_safepoint_check_never); // coordinate between fore- and background GC
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def(STS_lock , Monitor, leaf, true, Monitor::_safepoint_check_never);
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def(CGC_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // coordinate between fore- and background GC
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def(STS_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never);
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if (UseConcMarkSweepGC || UseG1GC) {
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def(FullGCCount_lock , Monitor, leaf, true, Monitor::_safepoint_check_never); // in support of ExplicitGCInvokesConcurrent
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def(FullGCCount_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never); // in support of ExplicitGCInvokesConcurrent
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}
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if (UseG1GC) {
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def(SATB_Q_FL_lock , Mutex , special, true, Monitor::_safepoint_check_never);
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def(SATB_Q_CBL_mon , Monitor, nonleaf, true, Monitor::_safepoint_check_never);
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def(Shared_SATB_Q_lock , Mutex, nonleaf, true, Monitor::_safepoint_check_never);
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def(SATB_Q_FL_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
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def(SATB_Q_CBL_mon , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_never);
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def(Shared_SATB_Q_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_never);
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def(DirtyCardQ_FL_lock , Mutex , special, true, Monitor::_safepoint_check_never);
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def(DirtyCardQ_CBL_mon , Monitor, nonleaf, true, Monitor::_safepoint_check_never);
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def(Shared_DirtyCardQ_lock , Mutex, nonleaf, true, Monitor::_safepoint_check_never);
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def(DirtyCardQ_FL_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
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def(DirtyCardQ_CBL_mon , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_never);
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def(Shared_DirtyCardQ_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_never);
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def(FreeList_lock , Mutex, leaf , true, Monitor::_safepoint_check_never);
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def(SecondaryFreeList_lock , Monitor, leaf , true, Monitor::_safepoint_check_never);
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def(OldSets_lock , Mutex , leaf , true, Monitor::_safepoint_check_never);
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def(RootRegionScan_lock , Monitor, leaf , true, Monitor::_safepoint_check_never);
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def(MMUTracker_lock , Mutex , leaf , true, Monitor::_safepoint_check_never);
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def(FreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
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def(SecondaryFreeList_lock , PaddedMonitor, leaf , true, Monitor::_safepoint_check_never);
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def(OldSets_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
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def(RootRegionScan_lock , PaddedMonitor, leaf , true, Monitor::_safepoint_check_never);
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def(MMUTracker_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
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def(StringDedupQueue_lock , Monitor, leaf, true, Monitor::_safepoint_check_never);
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def(StringDedupTable_lock , Mutex , leaf, true, Monitor::_safepoint_check_never);
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def(StringDedupQueue_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_never);
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def(StringDedupTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
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def(MarkStackFreeList_lock , Mutex , leaf , true, Monitor::_safepoint_check_never);
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def(MarkStackChunkList_lock , Mutex , leaf , true, Monitor::_safepoint_check_never);
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def(MarkStackFreeList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
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def(MarkStackChunkList_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_never);
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}
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def(ParGCRareEvent_lock , Mutex , leaf , true, Monitor::_safepoint_check_sometimes);
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def(DerivedPointerTableGC_lock , Mutex, leaf, true, Monitor::_safepoint_check_never);
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def(CodeCache_lock , Mutex , special, true, Monitor::_safepoint_check_never);
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def(RawMonitor_lock , Mutex, special, true, Monitor::_safepoint_check_never);
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def(OopMapCacheAlloc_lock , Mutex, leaf, true, Monitor::_safepoint_check_always); // used for oop_map_cache allocation.
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def(ParGCRareEvent_lock , PaddedMutex , leaf , true, Monitor::_safepoint_check_sometimes);
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def(DerivedPointerTableGC_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
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def(CodeCache_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
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def(RawMonitor_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
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def(OopMapCacheAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for oop_map_cache allocation.
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def(Patching_lock , Mutex , special, true, Monitor::_safepoint_check_never); // used for safepointing and code patching.
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def(Service_lock , Monitor, special, true, Monitor::_safepoint_check_never); // used for service thread operations
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def(JmethodIdCreation_lock , Mutex , leaf, true, Monitor::_safepoint_check_always); // used for creating jmethodIDs.
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def(Patching_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never); // used for safepointing and code patching.
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def(Service_lock , PaddedMonitor, special, true, Monitor::_safepoint_check_never); // used for service thread operations
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def(JmethodIdCreation_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for creating jmethodIDs.
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def(SystemDictionary_lock , Monitor, leaf, true, Monitor::_safepoint_check_always); // lookups done by VM thread
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def(Module_lock , Mutex , leaf+2, true, Monitor::_safepoint_check_always);
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def(InlineCacheBuffer_lock , Mutex , leaf, true, Monitor::_safepoint_check_always);
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def(VMStatistic_lock , Mutex , leaf, false, Monitor::_safepoint_check_always);
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def(ExpandHeap_lock , Mutex , leaf, true, Monitor::_safepoint_check_always); // Used during compilation by VM thread
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def(JNIHandleBlockFreeList_lock , Mutex , leaf, true, Monitor::_safepoint_check_never); // handles are used by VM thread
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def(SignatureHandlerLibrary_lock , Mutex , leaf, false, Monitor::_safepoint_check_always);
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def(SymbolTable_lock , Mutex , leaf+2, true, Monitor::_safepoint_check_always);
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def(StringTable_lock , Mutex , leaf, true, Monitor::_safepoint_check_always);
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def(ProfilePrint_lock , Mutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
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def(ExceptionCache_lock , Mutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
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def(OsrList_lock , Mutex , leaf, true, Monitor::_safepoint_check_never);
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def(Debug1_lock , Mutex , leaf, true, Monitor::_safepoint_check_never);
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def(SystemDictionary_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always); // lookups done by VM thread
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def(Module_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_always);
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def(InlineCacheBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always);
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def(VMStatistic_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always);
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def(ExpandHeap_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // Used during compilation by VM thread
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def(JNIHandleBlockFreeList_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never); // handles are used by VM thread
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def(SignatureHandlerLibrary_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always);
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def(SymbolTable_lock , PaddedMutex , leaf+2, true, Monitor::_safepoint_check_always);
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def(StringTable_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always);
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def(ProfilePrint_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
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def(ExceptionCache_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // serial profile printing
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def(OsrList_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
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def(Debug1_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
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#ifndef PRODUCT
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def(FullGCALot_lock , Mutex , leaf, false, Monitor::_safepoint_check_always); // a lock to make FullGCALot MT safe
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def(FullGCALot_lock , PaddedMutex , leaf, false, Monitor::_safepoint_check_always); // a lock to make FullGCALot MT safe
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#endif
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def(BeforeExit_lock , Monitor, leaf, true, Monitor::_safepoint_check_always);
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def(PerfDataMemAlloc_lock , Mutex , leaf, true, Monitor::_safepoint_check_always); // used for allocating PerfData memory for performance data
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def(PerfDataManager_lock , Mutex , leaf, true, Monitor::_safepoint_check_always); // used for synchronized access to PerfDataManager resources
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def(BeforeExit_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always);
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def(PerfDataMemAlloc_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for allocating PerfData memory for performance data
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def(PerfDataManager_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always); // used for synchronized access to PerfDataManager resources
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// CMS_modUnionTable_lock leaf
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// CMS_bitMap_lock leaf 1
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// CMS_freeList_lock leaf 2
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def(Safepoint_lock , Monitor, safepoint, true, Monitor::_safepoint_check_sometimes); // locks SnippetCache_lock/Threads_lock
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def(Safepoint_lock , PaddedMonitor, safepoint, true, Monitor::_safepoint_check_sometimes); // locks SnippetCache_lock/Threads_lock
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def(Threads_lock , Monitor, barrier, true, Monitor::_safepoint_check_sometimes);
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def(Threads_lock , PaddedMonitor, barrier, true, Monitor::_safepoint_check_sometimes);
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def(VMOperationQueue_lock , Monitor, nonleaf, true, Monitor::_safepoint_check_sometimes); // VM_thread allowed to block on these
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def(VMOperationRequest_lock , Monitor, nonleaf, true, Monitor::_safepoint_check_sometimes);
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def(RetData_lock , Mutex , nonleaf, false, Monitor::_safepoint_check_always);
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def(Terminator_lock , Monitor, nonleaf, true, Monitor::_safepoint_check_sometimes);
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def(VtableStubs_lock , Mutex , nonleaf, true, Monitor::_safepoint_check_always);
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def(Notify_lock , Monitor, nonleaf, true, Monitor::_safepoint_check_always);
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def(JNIGlobalHandle_lock , Mutex , nonleaf, true, Monitor::_safepoint_check_always); // locks JNIHandleBlockFreeList_lock
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def(JNICritical_lock , Monitor, nonleaf, true, Monitor::_safepoint_check_always); // used for JNI critical regions
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def(AdapterHandlerLibrary_lock , Mutex , nonleaf, true, Monitor::_safepoint_check_always);
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def(VMOperationQueue_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_sometimes); // VM_thread allowed to block on these
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def(VMOperationRequest_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_sometimes);
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def(RetData_lock , PaddedMutex , nonleaf, false, Monitor::_safepoint_check_always);
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def(Terminator_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_sometimes);
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def(VtableStubs_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always);
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def(Notify_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always);
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def(JNIGlobalHandle_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always); // locks JNIHandleBlockFreeList_lock
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def(JNICritical_lock , PaddedMonitor, nonleaf, true, Monitor::_safepoint_check_always); // used for JNI critical regions
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def(AdapterHandlerLibrary_lock , PaddedMutex , nonleaf, true, Monitor::_safepoint_check_always);
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def(Heap_lock , Monitor, nonleaf+1, false, Monitor::_safepoint_check_sometimes);
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def(JfieldIdCreation_lock , Mutex , nonleaf+1, true, Monitor::_safepoint_check_always); // jfieldID, Used in VM_Operation
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def(MemberNameTable_lock , Mutex , nonleaf+1, false, Monitor::_safepoint_check_always); // Used to protect MemberNameTable
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def(Heap_lock , PaddedMonitor, nonleaf+1, false, Monitor::_safepoint_check_sometimes);
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def(JfieldIdCreation_lock , PaddedMutex , nonleaf+1, true, Monitor::_safepoint_check_always); // jfieldID, Used in VM_Operation
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def(MemberNameTable_lock , PaddedMutex , nonleaf+1, false, Monitor::_safepoint_check_always); // Used to protect MemberNameTable
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def(CompiledIC_lock , Mutex , nonleaf+2, false, Monitor::_safepoint_check_always); // locks VtableStubs_lock, InlineCacheBuffer_lock
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def(CompileTaskAlloc_lock , Mutex , nonleaf+2, true, Monitor::_safepoint_check_always);
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def(CompileStatistics_lock , Mutex , nonleaf+2, false, Monitor::_safepoint_check_always);
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def(DirectivesStack_lock , Mutex , special, true, Monitor::_safepoint_check_never);
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def(MultiArray_lock , Mutex , nonleaf+2, false, Monitor::_safepoint_check_always); // locks SymbolTable_lock
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def(CompiledIC_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // locks VtableStubs_lock, InlineCacheBuffer_lock
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def(CompileTaskAlloc_lock , PaddedMutex , nonleaf+2, true, Monitor::_safepoint_check_always);
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def(CompileStatistics_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always);
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def(DirectivesStack_lock , PaddedMutex , special, true, Monitor::_safepoint_check_never);
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def(MultiArray_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // locks SymbolTable_lock
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def(JvmtiThreadState_lock , Mutex , nonleaf+2, false, Monitor::_safepoint_check_always); // Used by JvmtiThreadState/JvmtiEventController
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def(Management_lock , Mutex , nonleaf+2, false, Monitor::_safepoint_check_always); // used for JVM management
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def(JvmtiThreadState_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // Used by JvmtiThreadState/JvmtiEventController
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def(Management_lock , PaddedMutex , nonleaf+2, false, Monitor::_safepoint_check_always); // used for JVM management
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def(Compile_lock , Mutex , nonleaf+3, true, Monitor::_safepoint_check_sometimes);
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def(MethodData_lock , Mutex , nonleaf+3, false, Monitor::_safepoint_check_always);
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def(TouchedMethodLog_lock , Mutex , nonleaf+3, false, Monitor::_safepoint_check_always);
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def(Compile_lock , PaddedMutex , nonleaf+3, true, Monitor::_safepoint_check_sometimes);
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def(MethodData_lock , PaddedMutex , nonleaf+3, false, Monitor::_safepoint_check_always);
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def(TouchedMethodLog_lock , PaddedMutex , nonleaf+3, false, Monitor::_safepoint_check_always);
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def(MethodCompileQueue_lock , Monitor, nonleaf+4, true, Monitor::_safepoint_check_always);
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def(Debug2_lock , Mutex , nonleaf+4, true, Monitor::_safepoint_check_never);
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def(Debug3_lock , Mutex , nonleaf+4, true, Monitor::_safepoint_check_never);
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def(CompileThread_lock , Monitor, nonleaf+5, false, Monitor::_safepoint_check_always);
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def(PeriodicTask_lock , Monitor, nonleaf+5, true, Monitor::_safepoint_check_sometimes);
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def(RedefineClasses_lock , Monitor, nonleaf+5, true, Monitor::_safepoint_check_always);
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def(MethodCompileQueue_lock , PaddedMonitor, nonleaf+4, true, Monitor::_safepoint_check_always);
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def(Debug2_lock , PaddedMutex , nonleaf+4, true, Monitor::_safepoint_check_never);
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def(Debug3_lock , PaddedMutex , nonleaf+4, true, Monitor::_safepoint_check_never);
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def(CompileThread_lock , PaddedMonitor, nonleaf+5, false, Monitor::_safepoint_check_always);
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def(PeriodicTask_lock , PaddedMonitor, nonleaf+5, true, Monitor::_safepoint_check_sometimes);
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def(RedefineClasses_lock , PaddedMonitor, nonleaf+5, true, Monitor::_safepoint_check_always);
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if (WhiteBoxAPI) {
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def(Compilation_lock , Monitor, leaf, false, Monitor::_safepoint_check_never);
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def(Compilation_lock , PaddedMonitor, leaf, false, Monitor::_safepoint_check_never);
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}
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#ifdef INCLUDE_TRACE
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def(JfrMsg_lock , Monitor, leaf, true, Monitor::_safepoint_check_always);
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def(JfrBuffer_lock , Mutex, leaf, true, Monitor::_safepoint_check_never);
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def(JfrThreadGroups_lock , Mutex, leaf, true, Monitor::_safepoint_check_always);
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def(JfrStream_lock , Mutex, leaf+1, true, Monitor::_safepoint_check_never); // ensure to rank lower than 'safepoint'
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def(JfrStacktrace_lock , Mutex, special, true, Monitor::_safepoint_check_sometimes);
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def(JfrMsg_lock , PaddedMonitor, leaf, true, Monitor::_safepoint_check_always);
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def(JfrBuffer_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_never);
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def(JfrThreadGroups_lock , PaddedMutex , leaf, true, Monitor::_safepoint_check_always);
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def(JfrStream_lock , PaddedMutex , leaf+1, true, Monitor::_safepoint_check_never); // ensure to rank lower than 'safepoint'
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def(JfrStacktrace_lock , PaddedMutex , special, true, Monitor::_safepoint_check_sometimes);
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#endif
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#ifndef SUPPORTS_NATIVE_CX8
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def(UnsafeJlong_lock , Mutex, special, false, Monitor::_safepoint_check_never);
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def(UnsafeJlong_lock , PaddedMutex , special, false, Monitor::_safepoint_check_never);
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#endif
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}
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Block a user