author | pliden |
Wed, 28 Mar 2018 11:38:47 +0200 | |
changeset 49629 | b786280276dc |
child 49922 | 3a64eea72624 |
child 56422 | b09629f4b243 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 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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*/ |
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#include "precompiled.hpp" |
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#include "gc/serial/serialArguments.hpp" |
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#include "gc/shared/gcConfig.hpp" |
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#include "runtime/java.hpp" |
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#include "runtime/os.hpp" |
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#include "utilities/macros.hpp" |
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#if INCLUDE_ALL_GCS |
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#include "gc/parallel/parallelArguments.hpp" |
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#include "gc/cms/cmsArguments.hpp" |
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#include "gc/g1/g1Arguments.hpp" |
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#endif // INCLUDE_ALL_GCS |
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struct SupportedGC { |
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bool& _flag; |
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CollectedHeap::Name _name; |
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GCArguments& _arguments; |
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SupportedGC(bool& flag, CollectedHeap::Name name, GCArguments& arguments) : |
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_flag(flag), _name(name), _arguments(arguments) {} |
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}; |
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static SerialArguments serialArguments; |
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#if INCLUDE_ALL_GCS |
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static ParallelArguments parallelArguments; |
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static CMSArguments cmsArguments; |
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static G1Arguments g1Arguments; |
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#endif // INCLUDE_ALL_GCS |
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// Table of supported GCs, for translating between command |
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// line flag, CollectedHeap::Name and GCArguments instance. |
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static const SupportedGC SupportedGCs[] = { |
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SupportedGC(UseSerialGC, CollectedHeap::Serial, serialArguments), |
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#if INCLUDE_ALL_GCS |
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SupportedGC(UseParallelGC, CollectedHeap::Parallel, parallelArguments), |
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SupportedGC(UseParallelOldGC, CollectedHeap::Parallel, parallelArguments), |
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SupportedGC(UseConcMarkSweepGC, CollectedHeap::CMS, cmsArguments), |
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SupportedGC(UseG1GC, CollectedHeap::G1, g1Arguments), |
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#endif // INCLUDE_ALL_GCS |
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}; |
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GCArguments* GCConfig::_arguments = NULL; |
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bool GCConfig::_gc_selected_ergonomically = false; |
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void GCConfig::select_gc_ergonomically() { |
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#if INCLUDE_ALL_GCS |
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if (os::is_server_class_machine()) { |
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FLAG_SET_ERGO_IF_DEFAULT(bool, UseG1GC, true); |
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} else { |
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FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true); |
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} |
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#else |
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UNSUPPORTED_OPTION(UseG1GC); |
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UNSUPPORTED_OPTION(UseParallelGC); |
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UNSUPPORTED_OPTION(UseParallelOldGC); |
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UNSUPPORTED_OPTION(UseConcMarkSweepGC); |
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FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true); |
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#endif // INCLUDE_ALL_GCS |
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} |
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bool GCConfig::is_no_gc_selected() { |
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for (size_t i = 0; i < ARRAY_SIZE(SupportedGCs); i++) { |
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if (SupportedGCs[i]._flag) { |
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return false; |
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} |
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} |
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return true; |
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} |
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bool GCConfig::is_exactly_one_gc_selected() { |
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CollectedHeap::Name selected = CollectedHeap::None; |
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for (size_t i = 0; i < ARRAY_SIZE(SupportedGCs); i++) { |
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if (SupportedGCs[i]._flag) { |
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if (SupportedGCs[i]._name == selected || selected == CollectedHeap::None) { |
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// Selected |
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selected = SupportedGCs[i]._name; |
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} else { |
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// More than one selected |
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return false; |
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} |
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} |
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} |
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return selected != CollectedHeap::None; |
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} |
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GCArguments* GCConfig::select_gc() { |
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if (is_no_gc_selected()) { |
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// Try select GC ergonomically |
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select_gc_ergonomically(); |
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if (is_no_gc_selected()) { |
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// Failed to select GC ergonomically |
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vm_exit_during_initialization("Garbage collector not selected " |
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"(default collector explicitly disabled)", NULL); |
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} |
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// Succeeded to select GC ergonomically |
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_gc_selected_ergonomically = true; |
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} |
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if (is_exactly_one_gc_selected()) { |
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// Exacly one GC selected |
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for (size_t i = 0; i < ARRAY_SIZE(SupportedGCs); i++) { |
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if (SupportedGCs[i]._flag) { |
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return &SupportedGCs[i]._arguments; |
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} |
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} |
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} |
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// More than one GC selected |
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vm_exit_during_initialization("Multiple garbage collectors selected", NULL); |
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return NULL; |
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} |
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|
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void GCConfig::initialize() { |
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assert(_arguments == NULL, "Already initialized"); |
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_arguments = select_gc(); |
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} |
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|
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bool GCConfig::is_gc_supported(CollectedHeap::Name name) { |
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for (size_t i = 0; i < ARRAY_SIZE(SupportedGCs); i++) { |
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if (SupportedGCs[i]._name == name) { |
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// Supported |
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return true; |
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} |
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} |
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|
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// Not supported |
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return false; |
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} |
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|
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bool GCConfig::is_gc_selected(CollectedHeap::Name name) { |
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for (size_t i = 0; i < ARRAY_SIZE(SupportedGCs); i++) { |
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if (SupportedGCs[i]._name == name && SupportedGCs[i]._flag) { |
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// Selected |
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return true; |
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} |
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} |
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|
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// Not selected |
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return false; |
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} |
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|
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bool GCConfig::is_gc_selected_ergonomically() { |
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return _gc_selected_ergonomically; |
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} |
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|
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GCArguments* GCConfig::arguments() { |
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assert(_arguments != NULL, "Not initialized"); |
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return _arguments; |
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} |