182 {
183 GCTraceTime(Debug, gc, phases) trace("Phase 1: Weak Processing", scope()->timer());
184 WeakProcessor::weak_oops_do(&_is_alive, &do_nothing_cl);
185 }
186
187 // Class unloading and cleanup.
188 if (ClassUnloading) {
189 GCTraceTime(Debug, gc, phases) debug("Phase 1: Class Unloading and Cleanup", scope()->timer());
190 // Unload classes and purge the SystemDictionary.
191 bool purged_class = SystemDictionary::do_unloading(&_is_alive, scope()->timer());
192 _heap->complete_cleaning(&_is_alive, purged_class);
193 } else {
194 GCTraceTime(Debug, gc, phases) debug("Phase 1: String and Symbol Tables Cleanup", scope()->timer());
195 // If no class unloading just clean out strings and symbols.
196 _heap->partial_cleaning(&_is_alive, true, true, G1StringDedup::is_enabled());
197 }
198
199 scope()->tracer()->report_object_count_after_gc(&_is_alive);
200 }
201
202 void G1FullCollector::prepare_compaction_common() {
203 G1FullGCPrepareTask task(this);
204 run_task(&task);
205
206 // To avoid OOM when there is memory left.
207 if (!task.has_freed_regions()) {
208 task.prepare_serial_compaction();
209 }
210 }
211
212 void G1FullCollector::phase2_prepare_compaction() {
213 GCTraceTime(Info, gc, phases) info("Phase 2: Prepare for compaction", scope()->timer());
214 prepare_compaction_ext(); // Will call prepare_compaction_common() above.
215 }
216
217 void G1FullCollector::phase3_adjust_pointers() {
218 // Adjust the pointers to reflect the new locations
219 GCTraceTime(Info, gc, phases) info("Phase 3: Adjust pointers and remembered sets", scope()->timer());
220
221 G1FullGCAdjustTask task(this);
222 run_task(&task);
223 }
224
225 void G1FullCollector::phase4_do_compaction() {
226 // Compact the heap using the compaction queues created in phase 2.
227 GCTraceTime(Info, gc, phases) info("Phase 4: Compact heap", scope()->timer());
228 G1FullGCCompactTask task(this);
229 run_task(&task);
230
231 // Serial compact to avoid OOM when very few free regions.
232 if (serial_compaction_point()->has_regions()) {
233 task.serial_compaction();
234 }
|
182 {
183 GCTraceTime(Debug, gc, phases) trace("Phase 1: Weak Processing", scope()->timer());
184 WeakProcessor::weak_oops_do(&_is_alive, &do_nothing_cl);
185 }
186
187 // Class unloading and cleanup.
188 if (ClassUnloading) {
189 GCTraceTime(Debug, gc, phases) debug("Phase 1: Class Unloading and Cleanup", scope()->timer());
190 // Unload classes and purge the SystemDictionary.
191 bool purged_class = SystemDictionary::do_unloading(&_is_alive, scope()->timer());
192 _heap->complete_cleaning(&_is_alive, purged_class);
193 } else {
194 GCTraceTime(Debug, gc, phases) debug("Phase 1: String and Symbol Tables Cleanup", scope()->timer());
195 // If no class unloading just clean out strings and symbols.
196 _heap->partial_cleaning(&_is_alive, true, true, G1StringDedup::is_enabled());
197 }
198
199 scope()->tracer()->report_object_count_after_gc(&_is_alive);
200 }
201
202 void G1FullCollector::phase2_prepare_compaction() {
203 GCTraceTime(Info, gc, phases) info("Phase 2: Prepare for compaction", scope()->timer());
204 G1FullGCPrepareTask task(this);
205 run_task(&task);
206
207 // To avoid OOM when there is memory left.
208 if (!task.has_freed_regions()) {
209 task.prepare_serial_compaction();
210 }
211 }
212
213 void G1FullCollector::phase3_adjust_pointers() {
214 // Adjust the pointers to reflect the new locations
215 GCTraceTime(Info, gc, phases) info("Phase 3: Adjust pointers and remembered sets", scope()->timer());
216
217 G1FullGCAdjustTask task(this);
218 run_task(&task);
219 }
220
221 void G1FullCollector::phase4_do_compaction() {
222 // Compact the heap using the compaction queues created in phase 2.
223 GCTraceTime(Info, gc, phases) info("Phase 4: Compact heap", scope()->timer());
224 G1FullGCCompactTask task(this);
225 run_task(&task);
226
227 // Serial compact to avoid OOM when very few free regions.
228 if (serial_compaction_point()->has_regions()) {
229 task.serial_compaction();
230 }
|