115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
/*
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* Copyright (c) 2017, 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/z/zArguments.hpp"
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#include "gc/z/zCollectedHeap.hpp"
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#include "gc/z/zWorkers.hpp"
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#include "gc/shared/gcArguments.hpp"
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#include "runtime/globals.hpp"
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#include "runtime/globals_extension.hpp"
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void ZArguments::initialize_alignments() {
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SpaceAlignment = ZGranuleSize;
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HeapAlignment = SpaceAlignment;
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}
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void ZArguments::initialize() {
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GCArguments::initialize();
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// Check max heap size
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if (MaxHeapSize > ZMaxHeapSize) {
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vm_exit_during_initialization("Java heap too large");
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}
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// Enable NUMA by default
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if (FLAG_IS_DEFAULT(UseNUMA)) {
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FLAG_SET_DEFAULT(UseNUMA, true);
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}
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// Disable biased locking by default
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if (FLAG_IS_DEFAULT(UseBiasedLocking)) {
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FLAG_SET_DEFAULT(UseBiasedLocking, false);
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}
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// Select number of parallel threads
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if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
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FLAG_SET_DEFAULT(ParallelGCThreads, ZWorkers::calculate_nparallel());
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}
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if (ParallelGCThreads == 0) {
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vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ParallelGCThreads=0");
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}
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// Select number of concurrent threads
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if (FLAG_IS_DEFAULT(ConcGCThreads)) {
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FLAG_SET_DEFAULT(ConcGCThreads, ZWorkers::calculate_nconcurrent());
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}
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if (ConcGCThreads == 0) {
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vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ConcGCThreads=0");
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}
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#ifdef COMPILER2
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// Enable loop strip mining by default
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if (FLAG_IS_DEFAULT(UseCountedLoopSafepoints)) {
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FLAG_SET_DEFAULT(UseCountedLoopSafepoints, true);
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if (FLAG_IS_DEFAULT(LoopStripMiningIter)) {
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FLAG_SET_DEFAULT(LoopStripMiningIter, 1000);
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}
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}
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#endif
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// CompressedOops/UseCompressedClassPointers not supported
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FLAG_SET_DEFAULT(UseCompressedOops, false);
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FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
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// Verification before startup and after exit not (yet) supported
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FLAG_SET_DEFAULT(VerifyDuringStartup, false);
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FLAG_SET_DEFAULT(VerifyBeforeExit, false);
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// Verification before heap iteration not (yet) supported, for the
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// same reason we need fixup_partial_loads
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FLAG_SET_DEFAULT(VerifyBeforeIteration, false);
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if (VerifyBeforeGC || VerifyDuringGC || VerifyAfterGC) {
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FLAG_SET_DEFAULT(ZVerifyRoots, true);
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FLAG_SET_DEFAULT(ZVerifyObjects, true);
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}
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// Verification of stacks not (yet) supported, for the same reason
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// we need fixup_partial_loads
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DEBUG_ONLY(FLAG_SET_DEFAULT(VerifyStack, false));
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// Initialize platform specific arguments
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initialize_platform();
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}
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size_t ZArguments::conservative_max_heap_alignment() {
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return 0;
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}
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CollectedHeap* ZArguments::create_heap() {
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return new ZCollectedHeap();
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}
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