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107 lines
4.1 KiB
C++
107 lines
4.1 KiB
C++
/*
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* Copyright (c) 2015, 2023, 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 "runtime/flags/jvmFlag.hpp"
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#include "runtime/flags/jvmFlagLimit.hpp"
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#include "runtime/flags/jvmFlagConstraintsRuntime.hpp"
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#include "runtime/globals.hpp"
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#include "runtime/os.hpp"
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#include "runtime/safepointMechanism.hpp"
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#include "runtime/task.hpp"
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#include "utilities/powerOfTwo.hpp"
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JVMFlag::Error ObjectAlignmentInBytesConstraintFunc(int value, bool verbose) {
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if (!is_power_of_2(value)) {
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JVMFlag::printError(verbose,
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"ObjectAlignmentInBytes (%d) must be "
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"power of 2\n",
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value);
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return JVMFlag::VIOLATES_CONSTRAINT;
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}
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// In case page size is very small.
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if (value >= (intx)os::vm_page_size()) {
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JVMFlag::printError(verbose,
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"ObjectAlignmentInBytes (%d) must be "
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"less than page size (" SIZE_FORMAT ")\n",
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value, os::vm_page_size());
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return JVMFlag::VIOLATES_CONSTRAINT;
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}
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return JVMFlag::SUCCESS;
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}
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// Need to enforce the padding not to break the existing field alignments.
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// It is sufficient to check against the largest type size.
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JVMFlag::Error ContendedPaddingWidthConstraintFunc(int value, bool verbose) {
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if ((value % BytesPerLong) != 0) {
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JVMFlag::printError(verbose,
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"ContendedPaddingWidth (%d) must be "
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"a multiple of %d\n",
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value, BytesPerLong);
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return JVMFlag::VIOLATES_CONSTRAINT;
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} else {
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return JVMFlag::SUCCESS;
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}
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}
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JVMFlag::Error PerfDataSamplingIntervalFunc(intx value, bool verbose) {
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if ((value % PeriodicTask::interval_gran != 0)) {
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JVMFlag::printError(verbose,
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"PerfDataSamplingInterval (" INTX_FORMAT ") must be "
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"evenly divisible by PeriodicTask::interval_gran (%d)\n",
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value, PeriodicTask::interval_gran);
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return JVMFlag::VIOLATES_CONSTRAINT;
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} else {
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return JVMFlag::SUCCESS;
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}
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}
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JVMFlag::Error VMPageSizeConstraintFunc(uintx value, bool verbose) {
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uintx min = (uintx)os::vm_page_size();
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if (value < min) {
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JVMFlag::printError(verbose,
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"%s %s=" UINTX_FORMAT " is outside the allowed range [ " UINTX_FORMAT
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" ... " UINTX_FORMAT " ]\n",
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JVMFlagLimit::last_checked_flag()->type_string(),
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JVMFlagLimit::last_checked_flag()->name(),
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value, min, max_uintx);
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return JVMFlag::VIOLATES_CONSTRAINT;
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}
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return JVMFlag::SUCCESS;
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}
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JVMFlag::Error NUMAInterleaveGranularityConstraintFunc(size_t value, bool verbose) {
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size_t min = os::vm_allocation_granularity();
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size_t max = NOT_LP64(2*G) LP64_ONLY(8192*G);
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if (value < min || value > max) {
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JVMFlag::printError(verbose,
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"size_t NUMAInterleaveGranularity=" UINTX_FORMAT " is outside the allowed range [ " UINTX_FORMAT
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" ... " UINTX_FORMAT " ]\n", value, min, max);
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return JVMFlag::VIOLATES_CONSTRAINT;
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}
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return JVMFlag::SUCCESS;
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}
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