108 #endif // PRODUCT
109 extern Mutex* Debug1_lock; // A bunch of pre-allocated locks that can be used for tracing
110 extern Mutex* Debug2_lock; // down synchronization related bugs!
111 extern Mutex* Debug3_lock;
112
113 extern Mutex* RawMonitor_lock;
114 extern Mutex* PerfDataMemAlloc_lock; // a lock on the allocator for PerfData memory for performance data
115 extern Mutex* PerfDataManager_lock; // a long on access to PerfDataManager resources
116 extern Mutex* ParkerFreeList_lock;
117 extern Mutex* OopMapCacheAlloc_lock; // protects allocation of oop_map caches
118
119 extern Mutex* FreeList_lock; // protects the free region list during safepoints
120 extern Monitor* SecondaryFreeList_lock; // protects the secondary free region list
121 extern Mutex* OldSets_lock; // protects the old region sets
122 extern Monitor* RootRegionScan_lock; // used to notify that the CM threads have finished scanning the IM snapshot regions
123
124 extern Mutex* Management_lock; // a lock used to serialize JVM management
125 extern Monitor* Service_lock; // a lock used for service thread operation
126 extern Monitor* PeriodicTask_lock; // protects the periodic task structure
127 extern Monitor* RedefineClasses_lock; // locks classes from parallel redefinition
128
129 #if INCLUDE_TRACE
130 extern Mutex* JfrStacktrace_lock; // used to guard access to the JFR stacktrace table
131 extern Monitor* JfrMsg_lock; // protects JFR messaging
132 extern Mutex* JfrBuffer_lock; // protects JFR buffer operations
133 extern Mutex* JfrStream_lock; // protects JFR stream access
134 #endif
135
136 #ifndef SUPPORTS_NATIVE_CX8
137 extern Mutex* UnsafeJlong_lock; // provides Unsafe atomic updates to jlongs on platforms that don't support cx8
138 #endif
139
140 // A MutexLocker provides mutual exclusion with respect to a given mutex
141 // for the scope which contains the locker. The lock is an OS lock, not
142 // an object lock, and the two do not interoperate. Do not use Mutex-based
143 // locks to lock on Java objects, because they will not be respected if a
144 // that object is locked using the Java locking mechanism.
145 //
146 // NOTE WELL!!
147 //
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108 #endif // PRODUCT
109 extern Mutex* Debug1_lock; // A bunch of pre-allocated locks that can be used for tracing
110 extern Mutex* Debug2_lock; // down synchronization related bugs!
111 extern Mutex* Debug3_lock;
112
113 extern Mutex* RawMonitor_lock;
114 extern Mutex* PerfDataMemAlloc_lock; // a lock on the allocator for PerfData memory for performance data
115 extern Mutex* PerfDataManager_lock; // a long on access to PerfDataManager resources
116 extern Mutex* ParkerFreeList_lock;
117 extern Mutex* OopMapCacheAlloc_lock; // protects allocation of oop_map caches
118
119 extern Mutex* FreeList_lock; // protects the free region list during safepoints
120 extern Monitor* SecondaryFreeList_lock; // protects the secondary free region list
121 extern Mutex* OldSets_lock; // protects the old region sets
122 extern Monitor* RootRegionScan_lock; // used to notify that the CM threads have finished scanning the IM snapshot regions
123
124 extern Mutex* Management_lock; // a lock used to serialize JVM management
125 extern Monitor* Service_lock; // a lock used for service thread operation
126 extern Monitor* PeriodicTask_lock; // protects the periodic task structure
127 extern Monitor* RedefineClasses_lock; // locks classes from parallel redefinition
128 extern Monitor* ThreadHeapSampler_lock; // protects the static data for initialization.
129
130 #if INCLUDE_TRACE
131 extern Mutex* JfrStacktrace_lock; // used to guard access to the JFR stacktrace table
132 extern Monitor* JfrMsg_lock; // protects JFR messaging
133 extern Mutex* JfrBuffer_lock; // protects JFR buffer operations
134 extern Mutex* JfrStream_lock; // protects JFR stream access
135 #endif
136
137 #ifndef SUPPORTS_NATIVE_CX8
138 extern Mutex* UnsafeJlong_lock; // provides Unsafe atomic updates to jlongs on platforms that don't support cx8
139 #endif
140
141 // A MutexLocker provides mutual exclusion with respect to a given mutex
142 // for the scope which contains the locker. The lock is an OS lock, not
143 // an object lock, and the two do not interoperate. Do not use Mutex-based
144 // locks to lock on Java objects, because they will not be respected if a
145 // that object is locked using the Java locking mechanism.
146 //
147 // NOTE WELL!!
148 //
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