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 //
148 // See orderAccess.hpp. We assume throughout the VM that MutexLocker's
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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 extern Monitor* HeapMonitor_lock; // protects HeapMonitor initialize and stop calls
130 extern Monitor* HeapMonitorStorage_lock; // protects internal storage in HeapMonitoring
131
132 #if INCLUDE_TRACE
133 extern Mutex* JfrStacktrace_lock; // used to guard access to the JFR stacktrace table
134 extern Monitor* JfrMsg_lock; // protects JFR messaging
135 extern Mutex* JfrBuffer_lock; // protects JFR buffer operations
136 extern Mutex* JfrStream_lock; // protects JFR stream access
137 #endif
138
139 #ifndef SUPPORTS_NATIVE_CX8
140 extern Mutex* UnsafeJlong_lock; // provides Unsafe atomic updates to jlongs on platforms that don't support cx8
141 #endif
142
143 // A MutexLocker provides mutual exclusion with respect to a given mutex
144 // for the scope which contains the locker. The lock is an OS lock, not
145 // an object lock, and the two do not interoperate. Do not use Mutex-based
146 // locks to lock on Java objects, because they will not be respected if a
147 // that object is locked using the Java locking mechanism.
148 //
149 // NOTE WELL!!
150 //
151 // See orderAccess.hpp. We assume throughout the VM that MutexLocker's
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