140 
141   DependencyContext::cleaning_end();
142 }
143 
144 void ZUnload::purge() {
145   {
146     SuspendibleThreadSetJoiner sts;
147     ZNMethod::purge(_workers);
148   }
149 
150   ClassLoaderDataGraph::purge();
151   CodeCache::purge_exception_caches();
152 }
153 
154 class ZUnloadRendezvousClosure : public ThreadClosure {
155 public:
156   void do_thread(Thread* thread) {}
157 };
158 
159 void ZUnload::unload() {

160   if (!ClassUnloading) {



161     return;
162   }
163 
164   ZStatTimer timer(ZSubPhaseConcurrentClassesUnload);
165 
166   // Unlink stale metadata and nmethods
167   unlink();
168 
169   // Make sure stale metadata and nmethods are no longer observable
170   ZUnloadRendezvousClosure cl;
171   Handshake::execute(&cl);
172 
173   // Purge stale metadata and nmethods that were unlinked
174   purge();
175 }
176 
177 void ZUnload::finish() {
178   // Resize and verify metaspace
179   MetaspaceGC::compute_new_size();
180   MetaspaceUtils::verify_metrics();
181 }

140 
141   DependencyContext::cleaning_end();
142 }
143 
144 void ZUnload::purge() {
145   {
146     SuspendibleThreadSetJoiner sts;
147     ZNMethod::purge(_workers);
148   }
149 
150   ClassLoaderDataGraph::purge();
151   CodeCache::purge_exception_caches();
152 }
153 
154 class ZUnloadRendezvousClosure : public ThreadClosure {
155 public:
156   void do_thread(Thread* thread) {}
157 };
158 
159 void ZUnload::unload() {
160   ZUnloadRendezvousClosure cl;
161   if (!ClassUnloading) {
162     // Even when we don't use class unloading, we want a handshake to
163     // close the resurrection block window.
164     Handshake::execute(&cl);
165     return;
166   }
167 
168   ZStatTimer timer(ZSubPhaseConcurrentClassesUnload);
169 
170   // Unlink stale metadata and nmethods
171   unlink();
172 
173   // Make sure stale metadata and nmethods are no longer observable

174   Handshake::execute(&cl);
175 
176   // Purge stale metadata and nmethods that were unlinked
177   purge();
178 }
179 
180 void ZUnload::finish() {
181   // Resize and verify metaspace
182   MetaspaceGC::compute_new_size();
183   MetaspaceUtils::verify_metrics();
184 }