concurrent root iterator v3
1099 ResourceMark rm;
1100 LogStream ls(lt);
1101 ls.print("create ");
1102 cld->print_value_on(&ls);
1103 ls.cr();
1104 }
1105 return cld;
1106 }
1107
1108 ClassLoaderData* ClassLoaderDataGraph::add(Handle loader, bool is_unsafe_anonymous) {
1109 ClassLoaderData* loader_data = add_to_graph(loader, is_unsafe_anonymous);
1110 // Initialize _name and _name_and_id after the loader data is added to the
1111 // CLDG because adding the Symbol for _name and _name_and_id might safepoint.
1112 if (loader.not_null()) {
1113 loader_data->initialize_name(loader);
1114 }
1115 return loader_data;
1116 }
1117
1118 void ClassLoaderDataGraph::cld_do(CLDClosure* cl) {
1119 assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
1120 for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->_next) {
1121 cl->do_cld(cld);
1122 }
1123 }
1124
1125 void ClassLoaderDataGraph::cld_unloading_do(CLDClosure* cl) {
1126 assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
1127 // Only walk the head until any clds not purged from prior unloading
1128 // (CMS doesn't purge right away).
1129 for (ClassLoaderData* cld = _unloading; cld != _saved_unloading; cld = cld->next()) {
1130 assert(cld->is_unloading(), "invariant");
1131 cl->do_cld(cld);
1132 }
1133 }
1134
1135 void ClassLoaderDataGraph::roots_cld_do(CLDClosure* strong, CLDClosure* weak) {
1136 assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
1137 for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->_next) {
1138 CLDClosure* closure = cld->keep_alive() ? strong : weak;
1139 if (closure != NULL) {
1140 closure->do_cld(cld);
1141 }
1142 }
1143 }
1144
1145 void ClassLoaderDataGraph::always_strong_cld_do(CLDClosure* cl) {
1146 assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
1147 if (ClassUnloading) {
1148 roots_cld_do(cl, NULL);
1149 } else {
1150 cld_do(cl);
1151 }
1152 }
1153
1154 // Closure for locking and iterating through classes.
1155 LockedClassesDo::LockedClassesDo(classes_do_func_t f) : _function(f) {
1156 ClassLoaderDataGraph_lock->lock();
1157 }
1158
1159 LockedClassesDo::LockedClassesDo() : _function(NULL) {
1160 // callers provide their own do_klass
1161 ClassLoaderDataGraph_lock->lock();
1162 }
1163
1164 LockedClassesDo::~LockedClassesDo() { ClassLoaderDataGraph_lock->unlock(); }
1165
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1099 ResourceMark rm;
1100 LogStream ls(lt);
1101 ls.print("create ");
1102 cld->print_value_on(&ls);
1103 ls.cr();
1104 }
1105 return cld;
1106 }
1107
1108 ClassLoaderData* ClassLoaderDataGraph::add(Handle loader, bool is_unsafe_anonymous) {
1109 ClassLoaderData* loader_data = add_to_graph(loader, is_unsafe_anonymous);
1110 // Initialize _name and _name_and_id after the loader data is added to the
1111 // CLDG because adding the Symbol for _name and _name_and_id might safepoint.
1112 if (loader.not_null()) {
1113 loader_data->initialize_name(loader);
1114 }
1115 return loader_data;
1116 }
1117
1118 void ClassLoaderDataGraph::cld_do(CLDClosure* cl) {
1119 assert_locked_or_safepoint_weak(ClassLoaderDataGraph_lock);
1120 for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->_next) {
1121 cl->do_cld(cld);
1122 }
1123 }
1124
1125 void ClassLoaderDataGraph::cld_unloading_do(CLDClosure* cl) {
1126 assert_locked_or_safepoint_weak(ClassLoaderDataGraph_lock);
1127 // Only walk the head until any clds not purged from prior unloading
1128 // (CMS doesn't purge right away).
1129 for (ClassLoaderData* cld = _unloading; cld != _saved_unloading; cld = cld->next()) {
1130 assert(cld->is_unloading(), "invariant");
1131 cl->do_cld(cld);
1132 }
1133 }
1134
1135 void ClassLoaderDataGraph::roots_cld_do(CLDClosure* strong, CLDClosure* weak) {
1136 assert_locked_or_safepoint_weak(ClassLoaderDataGraph_lock);
1137 for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->_next) {
1138 CLDClosure* closure = cld->keep_alive() ? strong : weak;
1139 if (closure != NULL) {
1140 closure->do_cld(cld);
1141 }
1142 }
1143 }
1144
1145 void ClassLoaderDataGraph::always_strong_cld_do(CLDClosure* cl) {
1146 assert_locked_or_safepoint_weak(ClassLoaderDataGraph_lock);
1147 if (ClassUnloading) {
1148 roots_cld_do(cl, NULL);
1149 } else {
1150 cld_do(cl);
1151 }
1152 }
1153
1154 // Closure for locking and iterating through classes.
1155 LockedClassesDo::LockedClassesDo(classes_do_func_t f) : _function(f) {
1156 ClassLoaderDataGraph_lock->lock();
1157 }
1158
1159 LockedClassesDo::LockedClassesDo() : _function(NULL) {
1160 // callers provide their own do_klass
1161 ClassLoaderDataGraph_lock->lock();
1162 }
1163
1164 LockedClassesDo::~LockedClassesDo() { ClassLoaderDataGraph_lock->unlock(); }
1165
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