| /* |
| * Copyright (c) 2019, Red Hat, Inc. All rights reserved. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| |
| #include "precompiled.hpp" |
| |
| |
| #include "classfile/classLoaderData.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "code/codeCache.hpp" |
| #include "gc/shenandoah/shenandoahAsserts.hpp" |
| #include "gc/shenandoah/shenandoahHeap.hpp" |
| #include "gc/shenandoah/shenandoahPhaseTimings.hpp" |
| #include "gc/shenandoah/shenandoahRootVerifier.hpp" |
| #include "gc/shenandoah/shenandoahStringDedup.hpp" |
| #include "gc/shenandoah/shenandoahUtils.hpp" |
| #include "gc/shared/weakProcessor.hpp" |
| #include "memory/universe.hpp" |
| #include "runtime/thread.hpp" |
| #include "services/management.hpp" |
| #include "utilities/debug.hpp" |
| |
| // Check for overflow of number of root types. |
| STATIC_ASSERT((static_cast<uint>(ShenandoahRootVerifier::AllRoots) + 1) > static_cast<uint>(ShenandoahRootVerifier::AllRoots)); |
| |
| ShenandoahRootVerifier::ShenandoahRootVerifier() : _types(AllRoots) { |
| } |
| |
| void ShenandoahRootVerifier::excludes(RootTypes types) { |
| _types = static_cast<ShenandoahRootVerifier::RootTypes>(static_cast<uint>(_types) & (~static_cast<uint>(types))); |
| } |
| |
| bool ShenandoahRootVerifier::verify(RootTypes type) const { |
| return (_types & type) != 0; |
| } |
| |
| void ShenandoahRootVerifier::oops_do(OopClosure* oops) { |
| CodeBlobToOopClosure blobs(oops, !CodeBlobToOopClosure::FixRelocations); |
| if (verify(CodeRoots)) { |
| shenandoah_assert_locked_or_safepoint(CodeCache_lock); |
| CodeCache::blobs_do(&blobs); |
| } |
| |
| if (verify(CLDGRoots)) { |
| shenandoah_assert_safepoint(); |
| CLDToOopClosure clds(oops, false); |
| ClassLoaderDataGraph::cld_do(&clds); |
| } |
| |
| if (verify(SerialRoots)) { |
| shenandoah_assert_safepoint(); |
| Universe::oops_do(oops); |
| Management::oops_do(oops); |
| JvmtiExport::oops_do(oops); |
| ObjectSynchronizer::oops_do(oops); |
| SystemDictionary::oops_do(oops); |
| } |
| |
| if (verify(JNIHandleRoots)) { |
| shenandoah_assert_safepoint(); |
| JNIHandles::oops_do(oops); |
| } |
| |
| if (verify(WeakRoots)) { |
| shenandoah_assert_safepoint(); |
| AlwaysTrueClosure always_true; |
| WeakProcessor::weak_oops_do(&always_true, oops); |
| } |
| |
| if (ShenandoahStringDedup::is_enabled() && verify(StringDedupRoots)) { |
| shenandoah_assert_safepoint(); |
| ShenandoahStringDedup::oops_do_slow(oops); |
| } |
| |
| if (verify(ThreadRoots)) { |
| shenandoah_assert_safepoint(); |
| // Do thread roots the last. This allows verification code to find |
| // any broken objects from those special roots first, not the accidental |
| // dangling reference from the thread root. |
| Threads::possibly_parallel_oops_do(false, oops, &blobs); |
| } |
| } |
| |
| void ShenandoahRootVerifier::roots_do(OopClosure* oops) { |
| shenandoah_assert_safepoint(); |
| |
| CodeBlobToOopClosure blobs(oops, !CodeBlobToOopClosure::FixRelocations); |
| CodeCache::blobs_do(&blobs); |
| |
| CLDToOopClosure clds(oops, false); |
| ClassLoaderDataGraph::cld_do(&clds); |
| |
| Universe::oops_do(oops); |
| Management::oops_do(oops); |
| JvmtiExport::oops_do(oops); |
| JNIHandles::oops_do(oops); |
| ObjectSynchronizer::oops_do(oops); |
| SystemDictionary::oops_do(oops); |
| |
| AlwaysTrueClosure always_true; |
| WeakProcessor::weak_oops_do(&always_true, oops); |
| |
| if (ShenandoahStringDedup::is_enabled()) { |
| ShenandoahStringDedup::oops_do_slow(oops); |
| } |
| |
| // Do thread roots the last. This allows verification code to find |
| // any broken objects from those special roots first, not the accidental |
| // dangling reference from the thread root. |
| Threads::possibly_parallel_oops_do(false, oops, &blobs); |
| } |
| |
| void ShenandoahRootVerifier::strong_roots_do(OopClosure* oops) { |
| shenandoah_assert_safepoint(); |
| |
| CodeBlobToOopClosure blobs(oops, !CodeBlobToOopClosure::FixRelocations); |
| |
| CLDToOopClosure clds(oops, false); |
| ClassLoaderDataGraph::roots_cld_do(&clds, NULL); |
| |
| Universe::oops_do(oops); |
| Management::oops_do(oops); |
| JvmtiExport::oops_do(oops); |
| JNIHandles::oops_do(oops); |
| ObjectSynchronizer::oops_do(oops); |
| SystemDictionary::oops_do(oops); |
| |
| // Do thread roots the last. This allows verification code to find |
| // any broken objects from those special roots first, not the accidental |
| // dangling reference from the thread root. |
| Threads::possibly_parallel_oops_do(false, oops, &blobs); |
| } |