77 CompiledMethod* first;
78 CompiledMethodIterator last(CompiledMethodIterator::only_alive);
79
80 do {
81 *num_claimed_nmethods = 0;
82
83 first = _claimed_nmethod;
84 last = CompiledMethodIterator(CompiledMethodIterator::only_alive, first);
85
86 if (first != NULL) {
87
88 for (int i = 0; i < MaxClaimNmethods; i++) {
89 if (!last.next()) {
90 break;
91 }
92 claimed_nmethods[i] = last.method();
93 (*num_claimed_nmethods)++;
94 }
95 }
96
97 } while (Atomic::cmpxchg(last.method(), &_claimed_nmethod, first) != first);
98 }
99
100 void CodeCacheUnloadingTask::work(uint worker_id) {
101 // The first nmethods is claimed by the first worker.
102 if (worker_id == 0 && _first_nmethod != NULL) {
103 _first_nmethod->do_unloading(_unloading_occurred);
104 _first_nmethod = NULL;
105 }
106
107 int num_claimed_nmethods;
108 CompiledMethod* claimed_nmethods[MaxClaimNmethods];
109
110 while (true) {
111 claim_nmethods(claimed_nmethods, &num_claimed_nmethods);
112
113 if (num_claimed_nmethods == 0) {
114 break;
115 }
116
117 for (int i = 0; i < num_claimed_nmethods; i++) {
118 claimed_nmethods[i]->do_unloading(_unloading_occurred);
119 }
120 }
121 }
122
123 KlassCleaningTask::KlassCleaningTask() :
124 _clean_klass_tree_claimed(0),
125 _klass_iterator() {
126 }
127
128 bool KlassCleaningTask::claim_clean_klass_tree_task() {
129 if (_clean_klass_tree_claimed) {
130 return false;
131 }
132
133 return Atomic::cmpxchg(1, &_clean_klass_tree_claimed, 0) == 0;
134 }
135
136 InstanceKlass* KlassCleaningTask::claim_next_klass() {
137 Klass* klass;
138 do {
139 klass =_klass_iterator.next_klass();
140 } while (klass != NULL && !klass->is_instance_klass());
141
142 // this can be null so don't call InstanceKlass::cast
143 return static_cast<InstanceKlass*>(klass);
144 }
145
146 void KlassCleaningTask::work() {
147 ResourceMark rm;
148
149 // One worker will clean the subklass/sibling klass tree.
150 if (claim_clean_klass_tree_task()) {
151 Klass::clean_subklass_tree();
152 }
153
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77 CompiledMethod* first;
78 CompiledMethodIterator last(CompiledMethodIterator::only_alive);
79
80 do {
81 *num_claimed_nmethods = 0;
82
83 first = _claimed_nmethod;
84 last = CompiledMethodIterator(CompiledMethodIterator::only_alive, first);
85
86 if (first != NULL) {
87
88 for (int i = 0; i < MaxClaimNmethods; i++) {
89 if (!last.next()) {
90 break;
91 }
92 claimed_nmethods[i] = last.method();
93 (*num_claimed_nmethods)++;
94 }
95 }
96
97 } while (Atomic::cmpxchg(&_claimed_nmethod, first, last.method()) != first);
98 }
99
100 void CodeCacheUnloadingTask::work(uint worker_id) {
101 // The first nmethods is claimed by the first worker.
102 if (worker_id == 0 && _first_nmethod != NULL) {
103 _first_nmethod->do_unloading(_unloading_occurred);
104 _first_nmethod = NULL;
105 }
106
107 int num_claimed_nmethods;
108 CompiledMethod* claimed_nmethods[MaxClaimNmethods];
109
110 while (true) {
111 claim_nmethods(claimed_nmethods, &num_claimed_nmethods);
112
113 if (num_claimed_nmethods == 0) {
114 break;
115 }
116
117 for (int i = 0; i < num_claimed_nmethods; i++) {
118 claimed_nmethods[i]->do_unloading(_unloading_occurred);
119 }
120 }
121 }
122
123 KlassCleaningTask::KlassCleaningTask() :
124 _clean_klass_tree_claimed(0),
125 _klass_iterator() {
126 }
127
128 bool KlassCleaningTask::claim_clean_klass_tree_task() {
129 if (_clean_klass_tree_claimed) {
130 return false;
131 }
132
133 return Atomic::cmpxchg(&_clean_klass_tree_claimed, 0, 1) == 0;
134 }
135
136 InstanceKlass* KlassCleaningTask::claim_next_klass() {
137 Klass* klass;
138 do {
139 klass =_klass_iterator.next_klass();
140 } while (klass != NULL && !klass->is_instance_klass());
141
142 // this can be null so don't call InstanceKlass::cast
143 return static_cast<InstanceKlass*>(klass);
144 }
145
146 void KlassCleaningTask::work() {
147 ResourceMark rm;
148
149 // One worker will clean the subklass/sibling klass tree.
150 if (claim_clean_klass_tree_task()) {
151 Klass::clean_subklass_tree();
152 }
153
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