| /* |
| * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * 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 "gc/z/zAddressSpaceLimit.hpp" |
| #include "gc/z/zArguments.hpp" |
| #include "gc/z/zCollectedHeap.hpp" |
| #include "gc/z/zWorkers.hpp" |
| #include "gc/shared/gcArguments.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/globals_extension.hpp" |
| |
| void ZArguments::initialize_alignments() { |
| SpaceAlignment = ZGranuleSize; |
| HeapAlignment = SpaceAlignment; |
| } |
| |
| void ZArguments::initialize() { |
| GCArguments::initialize(); |
| |
| // Check mark stack size |
| const size_t mark_stack_space_limit = ZAddressSpaceLimit::mark_stack(); |
| if (ZMarkStackSpaceLimit > mark_stack_space_limit) { |
| if (!FLAG_IS_DEFAULT(ZMarkStackSpaceLimit)) { |
| vm_exit_during_initialization("ZMarkStackSpaceLimit too large for limited address space"); |
| } |
| FLAG_SET_DEFAULT(ZMarkStackSpaceLimit, mark_stack_space_limit); |
| } |
| |
| // Enable NUMA by default |
| if (FLAG_IS_DEFAULT(UseNUMA)) { |
| FLAG_SET_DEFAULT(UseNUMA, true); |
| } |
| |
| // Disable biased locking by default |
| if (FLAG_IS_DEFAULT(UseBiasedLocking)) { |
| FLAG_SET_DEFAULT(UseBiasedLocking, false); |
| } |
| |
| // Select number of parallel threads |
| if (FLAG_IS_DEFAULT(ParallelGCThreads)) { |
| FLAG_SET_DEFAULT(ParallelGCThreads, ZWorkers::calculate_nparallel()); |
| } |
| |
| if (ParallelGCThreads == 0) { |
| vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ParallelGCThreads=0"); |
| } |
| |
| // Select number of concurrent threads |
| if (FLAG_IS_DEFAULT(ConcGCThreads)) { |
| FLAG_SET_DEFAULT(ConcGCThreads, ZWorkers::calculate_nconcurrent()); |
| } |
| |
| if (ConcGCThreads == 0) { |
| vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ConcGCThreads=0"); |
| } |
| |
| #ifdef COMPILER2 |
| // Enable loop strip mining by default |
| if (FLAG_IS_DEFAULT(UseCountedLoopSafepoints)) { |
| FLAG_SET_DEFAULT(UseCountedLoopSafepoints, true); |
| if (FLAG_IS_DEFAULT(LoopStripMiningIter)) { |
| FLAG_SET_DEFAULT(LoopStripMiningIter, 1000); |
| } |
| } |
| #endif |
| |
| // CompressedOops/UseCompressedClassPointers not supported |
| FLAG_SET_DEFAULT(UseCompressedOops, false); |
| FLAG_SET_DEFAULT(UseCompressedClassPointers, false); |
| |
| // Verification before startup and after exit not (yet) supported |
| FLAG_SET_DEFAULT(VerifyDuringStartup, false); |
| FLAG_SET_DEFAULT(VerifyBeforeExit, false); |
| |
| // Verification before heap iteration not (yet) supported, for the |
| // same reason we need fixup_partial_loads |
| FLAG_SET_DEFAULT(VerifyBeforeIteration, false); |
| |
| if (VerifyBeforeGC || VerifyDuringGC || VerifyAfterGC) { |
| FLAG_SET_DEFAULT(ZVerifyRoots, true); |
| FLAG_SET_DEFAULT(ZVerifyObjects, true); |
| } |
| |
| // Verification of stacks not (yet) supported, for the same reason |
| // we need fixup_partial_loads |
| DEBUG_ONLY(FLAG_SET_DEFAULT(VerifyStack, false)); |
| |
| // Initialize platform specific arguments |
| initialize_platform(); |
| } |
| |
| size_t ZArguments::conservative_max_heap_alignment() { |
| return 0; |
| } |
| |
| CollectedHeap* ZArguments::create_heap() { |
| return new ZCollectedHeap(); |
| } |