99 vm_exit_during_initialization(
100 err_msg("GC triggered before VM initialization completed. Try increasing "
101 "NewSize, current value " SIZE_FORMAT "%s.",
102 byte_size_in_proper_unit(NewSize),
103 proper_unit_for_byte_size(NewSize)));
104 }
105
106 acquire_pending_list_lock();
107 // If the GC count has changed someone beat us to the collection
108 // Get the Heap_lock after the pending_list_lock.
109 Heap_lock->lock();
110
111 // Check invocations
112 if (skip_operation()) {
113 // skip collection
114 Heap_lock->unlock();
115 release_and_notify_pending_list_lock();
116 _prologue_succeeded = false;
117 } else {
118 _prologue_succeeded = true;
119 SharedHeap* sh = SharedHeap::heap();
120 if (sh != NULL) sh->_thread_holds_heap_lock_for_gc = true;
121 }
122 return _prologue_succeeded;
123 }
124
125
126 void VM_GC_Operation::doit_epilogue() {
127 assert(Thread::current()->is_Java_thread(), "just checking");
128 // Release the Heap_lock first.
129 SharedHeap* sh = SharedHeap::heap();
130 if (sh != NULL) sh->_thread_holds_heap_lock_for_gc = false;
131 Heap_lock->unlock();
132 release_and_notify_pending_list_lock();
133 }
134
135 bool VM_GC_HeapInspection::doit_prologue() {
136 if (Universe::heap()->supports_heap_inspection()) {
137 return VM_GC_Operation::doit_prologue();
138 } else {
139 return false;
140 }
141 }
142
143 bool VM_GC_HeapInspection::skip_operation() const {
144 assert(Universe::heap()->supports_heap_inspection(), "huh?");
145 return false;
146 }
147
148 bool VM_GC_HeapInspection::collect() {
149 if (GC_locker::is_active()) {
150 return false;
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99 vm_exit_during_initialization(
100 err_msg("GC triggered before VM initialization completed. Try increasing "
101 "NewSize, current value " SIZE_FORMAT "%s.",
102 byte_size_in_proper_unit(NewSize),
103 proper_unit_for_byte_size(NewSize)));
104 }
105
106 acquire_pending_list_lock();
107 // If the GC count has changed someone beat us to the collection
108 // Get the Heap_lock after the pending_list_lock.
109 Heap_lock->lock();
110
111 // Check invocations
112 if (skip_operation()) {
113 // skip collection
114 Heap_lock->unlock();
115 release_and_notify_pending_list_lock();
116 _prologue_succeeded = false;
117 } else {
118 _prologue_succeeded = true;
119 }
120 return _prologue_succeeded;
121 }
122
123
124 void VM_GC_Operation::doit_epilogue() {
125 assert(Thread::current()->is_Java_thread(), "just checking");
126 // Release the Heap_lock first.
127 Heap_lock->unlock();
128 release_and_notify_pending_list_lock();
129 }
130
131 bool VM_GC_HeapInspection::doit_prologue() {
132 if (Universe::heap()->supports_heap_inspection()) {
133 return VM_GC_Operation::doit_prologue();
134 } else {
135 return false;
136 }
137 }
138
139 bool VM_GC_HeapInspection::skip_operation() const {
140 assert(Universe::heap()->supports_heap_inspection(), "huh?");
141 return false;
142 }
143
144 bool VM_GC_HeapInspection::collect() {
145 if (GC_locker::is_active()) {
146 return false;
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