201 false, // Younger gens are not roots.
202 GenCollectedHeap::SO_None,
203 ClassUnloading,
204 &follow_root_closure,
205 &follow_root_closure,
206 &follow_cld_closure);
207 }
208
209 // Process reference objects found during marking
210 {
211 ref_processor()->setup_policy(clear_all_softrefs);
212 const ReferenceProcessorStats& stats =
213 ref_processor()->process_discovered_references(
214 &is_alive, &keep_alive, &follow_stack_closure, NULL, _gc_timer);
215 gc_tracer()->report_gc_reference_stats(stats);
216 }
217
218 // This is the point where the entire marking should have completed.
219 assert(_marking_stack.is_empty(), "Marking should have completed");
220
221 // Unload classes and purge the SystemDictionary.
222 bool purged_class = SystemDictionary::do_unloading(&is_alive);
223
224 // Unload nmethods.
225 CodeCache::do_unloading(&is_alive, purged_class);
226
227 // Prune dead klasses from subklass/sibling/implementor lists.
228 Klass::clean_weak_klass_links(&is_alive);
229
230 // Delete entries for dead interned strings.
231 StringTable::unlink(&is_alive);
232
233 // Clean up unreferenced symbols in symbol table.
234 SymbolTable::unlink();
235
236 gc_tracer()->report_object_count_after_gc(&is_alive);
237 }
238
239
240 void GenMarkSweep::mark_sweep_phase2() {
241 // Now all live objects are marked, compute the new object addresses.
242
243 // It is imperative that we traverse perm_gen LAST. If dead space is
244 // allowed a range of dead object may get overwritten by a dead int
245 // array. If perm_gen is not traversed last a Klass* may get
246 // overwritten. This is fine since it is dead, but if the class has dead
247 // instances we have to skip them, and in order to find their size we
248 // need the Klass*!
249 //
250 // It is not required that we traverse spaces in the same order in
251 // phase2, phase3 and phase4, but the ValidateMarkSweep live oops
252 // tracking expects us to do so. See comment under phase4.
253
254 GenCollectedHeap* gch = GenCollectedHeap::heap();
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201 false, // Younger gens are not roots.
202 GenCollectedHeap::SO_None,
203 ClassUnloading,
204 &follow_root_closure,
205 &follow_root_closure,
206 &follow_cld_closure);
207 }
208
209 // Process reference objects found during marking
210 {
211 ref_processor()->setup_policy(clear_all_softrefs);
212 const ReferenceProcessorStats& stats =
213 ref_processor()->process_discovered_references(
214 &is_alive, &keep_alive, &follow_stack_closure, NULL, _gc_timer);
215 gc_tracer()->report_gc_reference_stats(stats);
216 }
217
218 // This is the point where the entire marking should have completed.
219 assert(_marking_stack.is_empty(), "Marking should have completed");
220
221 {
222 GCTraceTime(Debug, gc) tm_m("Class Unloading", gc_timer());
223
224 // Unload classes and purge the SystemDictionary.
225 bool purged_class = SystemDictionary::do_unloading(&is_alive);
226
227 // Unload nmethods.
228 CodeCache::do_unloading(&is_alive, purged_class);
229
230 // Prune dead klasses from subklass/sibling/implementor lists.
231 Klass::clean_weak_klass_links(&is_alive);
232 }
233
234 {
235 GCTraceTime(Debug, gc) t("Scrub String Table", gc_timer());
236 // Delete entries for dead interned strings.
237 StringTable::unlink(&is_alive);
238 }
239
240 {
241 GCTraceTime(Debug, gc) t("Scrub Symbol Table", gc_timer());
242 // Clean up unreferenced symbols in symbol table.
243 SymbolTable::unlink();
244 }
245
246 gc_tracer()->report_object_count_after_gc(&is_alive);
247 }
248
249
250 void GenMarkSweep::mark_sweep_phase2() {
251 // Now all live objects are marked, compute the new object addresses.
252
253 // It is imperative that we traverse perm_gen LAST. If dead space is
254 // allowed a range of dead object may get overwritten by a dead int
255 // array. If perm_gen is not traversed last a Klass* may get
256 // overwritten. This is fine since it is dead, but if the class has dead
257 // instances we have to skip them, and in order to find their size we
258 // need the Klass*!
259 //
260 // It is not required that we traverse spaces in the same order in
261 // phase2, phase3 and phase4, but the ValidateMarkSweep live oops
262 // tracking expects us to do so. See comment under phase4.
263
264 GenCollectedHeap* gch = GenCollectedHeap::heap();
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