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;
147 }
148 Universe::heap()->collect_as_vm_thread(GCCause::_heap_inspection);
149 return true;
150 }
151
152 void VM_GC_HeapInspection::doit() {
153 HandleMark hm;
154 Universe::heap()->ensure_parsability(false); // must happen, even if collection does
155 // not happen (e.g. due to GC_locker)
156 // or _full_gc being false
157 if (_full_gc) {
158 if (!collect()) {
159 // The collection attempt was skipped because the gc locker is held.
160 // The following dump may then be a tad misleading to someone expecting
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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::skip_operation() const {
132 return false;
133 }
134
135 bool VM_GC_HeapInspection::collect() {
136 if (GC_locker::is_active()) {
137 return false;
138 }
139 Universe::heap()->collect_as_vm_thread(GCCause::_heap_inspection);
140 return true;
141 }
142
143 void VM_GC_HeapInspection::doit() {
144 HandleMark hm;
145 Universe::heap()->ensure_parsability(false); // must happen, even if collection does
146 // not happen (e.g. due to GC_locker)
147 // or _full_gc being false
148 if (_full_gc) {
149 if (!collect()) {
150 // The collection attempt was skipped because the gc locker is held.
151 // The following dump may then be a tad misleading to someone expecting
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