300 ReferenceProcessor* rp = _heap->ref_processor();
301 // enable ("weak") refs discovery
302 rp->enable_discovery(true /*verify_no_refs*/);
303 rp->setup_policy(true); // snapshot the soft ref policy to be used in this cycle
304 rp->set_active_mt_degree(_heap->workers()->active_workers());
305
306 COMPILER2_PRESENT(DerivedPointerTable::clear());
307 cm->update_roots();
308 COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
309
310 cm->mark_roots();
311 cm->shared_finish_mark_from_roots(/* full_gc = */ true);
312
313 _heap->swap_mark_bitmaps();
314
315 if (UseShenandoahMatrix) {
316 if (PrintShenandoahMatrix) {
317 outputStream* log = Log(gc)::info_stream();
318 _heap->connection_matrix()->print_on(log);
319 }
320 if (VerifyShenandoahMatrix) {
321 _heap->verify_matrix();
322 }
323 }
324
325 if (VerifyDuringGC) {
326 HandleMark hm; // handle scope
327 // Universe::heap()->prepare_for_verify();
328 _heap->prepare_for_verify();
329 // Note: we can verify only the heap here. When an object is
330 // marked, the previous value of the mark word (including
331 // identity hash values, ages, etc) is preserved, and the mark
332 // word is set to markOop::marked_value - effectively removing
333 // any hash values from the mark word. These hash values are
334 // used when verifying the dictionaries and so removing them
335 // from the mark word can make verification of the dictionaries
336 // fail. At the end of the GC, the original mark word values
337 // (including hash values) are restored to the appropriate
338 // objects.
339 // Universe::heap()->verify(VerifySilently, VerifyOption_G1UseMarkWord);
340 _heap->verify(VerifyOption_G1UseMarkWord);
341 }
342
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300 ReferenceProcessor* rp = _heap->ref_processor();
301 // enable ("weak") refs discovery
302 rp->enable_discovery(true /*verify_no_refs*/);
303 rp->setup_policy(true); // snapshot the soft ref policy to be used in this cycle
304 rp->set_active_mt_degree(_heap->workers()->active_workers());
305
306 COMPILER2_PRESENT(DerivedPointerTable::clear());
307 cm->update_roots();
308 COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
309
310 cm->mark_roots();
311 cm->shared_finish_mark_from_roots(/* full_gc = */ true);
312
313 _heap->swap_mark_bitmaps();
314
315 if (UseShenandoahMatrix) {
316 if (PrintShenandoahMatrix) {
317 outputStream* log = Log(gc)::info_stream();
318 _heap->connection_matrix()->print_on(log);
319 }
320 }
321
322 if (ShenandoahVerify || (UseShenandoahMatrix && VerifyShenandoahMatrix)) {
323 _heap->verify_heap_reachable_at_safepoint();
324 }
325
326 if (VerifyDuringGC) {
327 HandleMark hm; // handle scope
328 // Universe::heap()->prepare_for_verify();
329 _heap->prepare_for_verify();
330 // Note: we can verify only the heap here. When an object is
331 // marked, the previous value of the mark word (including
332 // identity hash values, ages, etc) is preserved, and the mark
333 // word is set to markOop::marked_value - effectively removing
334 // any hash values from the mark word. These hash values are
335 // used when verifying the dictionaries and so removing them
336 // from the mark word can make verification of the dictionaries
337 // fail. At the end of the GC, the original mark word values
338 // (including hash values) are restored to the appropriate
339 // objects.
340 // Universe::heap()->verify(VerifySilently, VerifyOption_G1UseMarkWord);
341 _heap->verify(VerifyOption_G1UseMarkWord);
342 }
343
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