author | stuefe |
Tue, 26 Nov 2019 16:21:29 +0100 | |
branch | stuefe-new-metaspace-branch |
changeset 59272 | 54750b448264 |
parent 58494 | 54c1ba464b78 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include "precompiled.hpp" |
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#include "gc/shared/gcHeapSummary.hpp" |
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#include "gc/shared/suspendibleThreadSet.hpp" |
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#include "gc/z/zCollectedHeap.hpp" |
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#include "gc/z/zGlobals.hpp" |
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#include "gc/z/zHeap.inline.hpp" |
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#include "gc/z/zNMethod.hpp" |
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#include "gc/z/zObjArrayAllocator.hpp" |
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#include "gc/z/zOop.inline.hpp" |
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#include "gc/z/zServiceability.hpp" |
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#include "gc/z/zStat.hpp" |
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#include "gc/z/zUtils.inline.hpp" |
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#include "memory/metaspace/classLoaderMetaspace.hpp" |
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#include "memory/universe.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "utilities/align.hpp" |
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ZCollectedHeap* ZCollectedHeap::heap() { |
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CollectedHeap* heap = Universe::heap(); |
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assert(heap != NULL, "Uninitialized access to ZCollectedHeap::heap()"); |
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assert(heap->kind() == CollectedHeap::Z, "Invalid name"); |
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return (ZCollectedHeap*)heap; |
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} |
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ZCollectedHeap::ZCollectedHeap() : |
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_soft_ref_policy(), |
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_barrier_set(), |
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_initialize(&_barrier_set), |
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_heap(), |
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_director(new ZDirector()), |
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_driver(new ZDriver()), |
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_uncommitter(new ZUncommitter()), |
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_stat(new ZStat()), |
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_runtime_workers() {} |
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CollectedHeap::Name ZCollectedHeap::kind() const { |
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return CollectedHeap::Z; |
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} |
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const char* ZCollectedHeap::name() const { |
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return ZName; |
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} |
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jint ZCollectedHeap::initialize() { |
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if (!_heap.is_initialized()) { |
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return JNI_ENOMEM; |
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} |
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Universe::calculate_verify_data((HeapWord*)0, (HeapWord*)UINTPTR_MAX); |
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return JNI_OK; |
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} |
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void ZCollectedHeap::initialize_serviceability() { |
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_heap.serviceability_initialize(); |
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} |
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void ZCollectedHeap::stop() { |
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_director->stop(); |
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_driver->stop(); |
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_uncommitter->stop(); |
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_stat->stop(); |
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} |
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SoftRefPolicy* ZCollectedHeap::soft_ref_policy() { |
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return &_soft_ref_policy; |
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} |
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size_t ZCollectedHeap::max_capacity() const { |
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return _heap.max_capacity(); |
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} |
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size_t ZCollectedHeap::capacity() const { |
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return _heap.capacity(); |
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} |
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size_t ZCollectedHeap::used() const { |
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return _heap.used(); |
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} |
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size_t ZCollectedHeap::unused() const { |
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return _heap.unused(); |
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} |
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bool ZCollectedHeap::is_maximal_no_gc() const { |
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// Not supported |
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ShouldNotReachHere(); |
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return false; |
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} |
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bool ZCollectedHeap::is_in(const void* p) const { |
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return _heap.is_in((uintptr_t)p); |
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} |
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uint32_t ZCollectedHeap::hash_oop(oop obj) const { |
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return _heap.hash_oop(ZOop::to_address(obj)); |
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} |
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HeapWord* ZCollectedHeap::allocate_new_tlab(size_t min_size, size_t requested_size, size_t* actual_size) { |
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const size_t size_in_bytes = ZUtils::words_to_bytes(align_object_size(requested_size)); |
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const uintptr_t addr = _heap.alloc_tlab(size_in_bytes); |
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if (addr != 0) { |
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*actual_size = requested_size; |
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} |
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return (HeapWord*)addr; |
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} |
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oop ZCollectedHeap::array_allocate(Klass* klass, int size, int length, bool do_zero, TRAPS) { |
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if (!do_zero) { |
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return CollectedHeap::array_allocate(klass, size, length, false /* do_zero */, THREAD); |
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} |
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ZObjArrayAllocator allocator(klass, size, length, THREAD); |
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return allocator.allocate(); |
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} |
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HeapWord* ZCollectedHeap::mem_allocate(size_t size, bool* gc_overhead_limit_was_exceeded) { |
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const size_t size_in_bytes = ZUtils::words_to_bytes(align_object_size(size)); |
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return (HeapWord*)_heap.alloc_object(size_in_bytes); |
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} |
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|
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MetaWord* ZCollectedHeap::satisfy_failed_metadata_allocation(ClassLoaderData* loader_data, |
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size_t size, |
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Metaspace::MetadataType mdtype) { |
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MetaWord* result; |
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|
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// Start asynchronous GC |
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collect(GCCause::_metadata_GC_threshold); |
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|
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// Expand and retry allocation |
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result = loader_data->metaspace_non_null()->expand_and_allocate(size, mdtype); |
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if (result != NULL) { |
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return result; |
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} |
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|
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// Start synchronous GC |
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collect(GCCause::_metadata_GC_clear_soft_refs); |
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|
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// Retry allocation |
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result = loader_data->metaspace_non_null()->allocate(size, mdtype); |
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if (result != NULL) { |
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return result; |
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} |
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|
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// Expand and retry allocation |
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result = loader_data->metaspace_non_null()->expand_and_allocate(size, mdtype); |
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if (result != NULL) { |
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return result; |
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} |
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|
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// Out of memory |
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return NULL; |
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} |
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|
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void ZCollectedHeap::collect(GCCause::Cause cause) { |
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_driver->collect(cause); |
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} |
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|
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void ZCollectedHeap::collect_as_vm_thread(GCCause::Cause cause) { |
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// These collection requests are ignored since ZGC can't run a synchronous |
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// GC cycle from within the VM thread. This is considered benign, since the |
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// only GC causes coming in here should be heap dumper and heap inspector. |
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// However, neither the heap dumper nor the heap inspector really need a GC |
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// to happen, but the result of their heap iterations might in that case be |
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// less accurate since they might include objects that would otherwise have |
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// been collected by a GC. |
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assert(Thread::current()->is_VM_thread(), "Should be the VM thread"); |
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guarantee(cause == GCCause::_heap_dump || |
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cause == GCCause::_heap_inspection, "Invalid cause"); |
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} |
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|
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void ZCollectedHeap::do_full_collection(bool clear_all_soft_refs) { |
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// Not supported |
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ShouldNotReachHere(); |
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} |
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|
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bool ZCollectedHeap::supports_tlab_allocation() const { |
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return true; |
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} |
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|
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size_t ZCollectedHeap::tlab_capacity(Thread* ignored) const { |
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return _heap.tlab_capacity(); |
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} |
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|
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size_t ZCollectedHeap::tlab_used(Thread* ignored) const { |
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return _heap.tlab_used(); |
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} |
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|
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size_t ZCollectedHeap::max_tlab_size() const { |
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return _heap.max_tlab_size(); |
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} |
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|
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size_t ZCollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { |
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return _heap.unsafe_max_tlab_alloc(); |
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} |
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|
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bool ZCollectedHeap::can_elide_tlab_store_barriers() const { |
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return false; |
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} |
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|
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bool ZCollectedHeap::can_elide_initializing_store_barrier(oop new_obj) { |
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// Not supported |
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ShouldNotReachHere(); |
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return true; |
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} |
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|
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bool ZCollectedHeap::card_mark_must_follow_store() const { |
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// Not supported |
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ShouldNotReachHere(); |
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return false; |
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} |
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|
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GrowableArray<GCMemoryManager*> ZCollectedHeap::memory_managers() { |
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return GrowableArray<GCMemoryManager*>(1, 1, _heap.serviceability_memory_manager()); |
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} |
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|
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GrowableArray<MemoryPool*> ZCollectedHeap::memory_pools() { |
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return GrowableArray<MemoryPool*>(1, 1, _heap.serviceability_memory_pool()); |
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} |
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void ZCollectedHeap::object_iterate(ObjectClosure* cl) { |
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_heap.object_iterate(cl, true /* visit_weaks */); |
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} |
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void ZCollectedHeap::safe_object_iterate(ObjectClosure* cl) { |
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_heap.object_iterate(cl, true /* visit_weaks */); |
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} |
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void ZCollectedHeap::register_nmethod(nmethod* nm) { |
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ZNMethod::register_nmethod(nm); |
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} |
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void ZCollectedHeap::unregister_nmethod(nmethod* nm) { |
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ZNMethod::unregister_nmethod(nm); |
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} |
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|
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void ZCollectedHeap::flush_nmethod(nmethod* nm) { |
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ZNMethod::flush_nmethod(nm); |
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} |
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|
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void ZCollectedHeap::verify_nmethod(nmethod* nm) { |
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// Does nothing |
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} |
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WorkGang* ZCollectedHeap::get_safepoint_workers() { |
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return _runtime_workers.workers(); |
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} |
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jlong ZCollectedHeap::millis_since_last_gc() { |
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return ZStatCycle::time_since_last() / MILLIUNITS; |
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} |
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|
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void ZCollectedHeap::gc_threads_do(ThreadClosure* tc) const { |
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tc->do_thread(_director); |
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tc->do_thread(_driver); |
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tc->do_thread(_uncommitter); |
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tc->do_thread(_stat); |
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_heap.worker_threads_do(tc); |
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_runtime_workers.threads_do(tc); |
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} |
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|
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VirtualSpaceSummary ZCollectedHeap::create_heap_space_summary() { |
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return VirtualSpaceSummary((HeapWord*)0, (HeapWord*)capacity(), (HeapWord*)max_capacity()); |
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} |
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|
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void ZCollectedHeap::safepoint_synchronize_begin() { |
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SuspendibleThreadSet::synchronize(); |
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} |
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|
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void ZCollectedHeap::safepoint_synchronize_end() { |
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SuspendibleThreadSet::desynchronize(); |
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} |
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|
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void ZCollectedHeap::prepare_for_verify() { |
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// Does nothing |
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} |
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|
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void ZCollectedHeap::print_on(outputStream* st) const { |
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_heap.print_on(st); |
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} |
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|
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void ZCollectedHeap::print_on_error(outputStream* st) const { |
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CollectedHeap::print_on_error(st); |
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|
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st->print_cr( "Heap"); |
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st->print_cr( " GlobalPhase: %u", ZGlobalPhase); |
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st->print_cr( " GlobalSeqNum: %u", ZGlobalSeqNum); |
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st->print_cr( " Offset Max: " SIZE_FORMAT_W(-15) " (" PTR_FORMAT ")", ZAddressOffsetMax, ZAddressOffsetMax); |
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st->print_cr( " Page Size Small: " SIZE_FORMAT_W(-15) " (" PTR_FORMAT ")", ZPageSizeSmall, ZPageSizeSmall); |
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st->print_cr( " Page Size Medium: " SIZE_FORMAT_W(-15) " (" PTR_FORMAT ")", ZPageSizeMedium, ZPageSizeMedium); |
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st->print_cr( "Metadata Bits"); |
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st->print_cr( " Good: " PTR_FORMAT, ZAddressGoodMask); |
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st->print_cr( " Bad: " PTR_FORMAT, ZAddressBadMask); |
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st->print_cr( " WeakBad: " PTR_FORMAT, ZAddressWeakBadMask); |
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st->print_cr( " Marked: " PTR_FORMAT, ZAddressMetadataMarked); |
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st->print_cr( " Remapped: " PTR_FORMAT, ZAddressMetadataRemapped); |
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} |
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|
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void ZCollectedHeap::print_extended_on(outputStream* st) const { |
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_heap.print_extended_on(st); |
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} |
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|
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void ZCollectedHeap::print_gc_threads_on(outputStream* st) const { |
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_director->print_on(st); |
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st->cr(); |
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_driver->print_on(st); |
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st->cr(); |
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_uncommitter->print_on(st); |
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st->cr(); |
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_stat->print_on(st); |
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st->cr(); |
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_heap.print_worker_threads_on(st); |
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_runtime_workers.print_threads_on(st); |
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} |
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|
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void ZCollectedHeap::print_tracing_info() const { |
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// Does nothing |
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343 |
} |
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|
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bool ZCollectedHeap::print_location(outputStream* st, void* addr) const { |
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return _heap.print_location(st, (uintptr_t)addr); |
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} |
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|
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void ZCollectedHeap::verify(VerifyOption option /* ignored */) { |
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_heap.verify(); |
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} |
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352 |
|
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bool ZCollectedHeap::is_oop(oop object) const { |
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return _heap.is_oop(ZOop::to_address(object)); |
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} |