1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "runtime/arguments.hpp" 27 #include "runtime/commandLineFlagConstraintsRuntime.hpp" 28 #include "runtime/commandLineFlagRangeList.hpp" 29 #include "runtime/globals.hpp" 30 #include "runtime/task.hpp" 31 #include "utilities/defaultStream.hpp" 32 33 Flag::Error ObjectAlignmentInBytesConstraintFunc(intx value, bool verbose) { 34 if (!is_power_of_2(value)) { 35 CommandLineError::print(verbose, 36 "ObjectAlignmentInBytes (" INTX_FORMAT ") must be " 37 "power of 2\n", 38 value); 39 return Flag::VIOLATES_CONSTRAINT; 40 } 41 // In case page size is very small. 42 if (value >= (intx)os::vm_page_size()) { 43 CommandLineError::print(verbose, 44 "ObjectAlignmentInBytes (" INTX_FORMAT ") must be " 45 "less than page size (" INTX_FORMAT ")\n", 46 value, (intx)os::vm_page_size()); 47 return Flag::VIOLATES_CONSTRAINT; 48 } 49 return Flag::SUCCESS; 50 } 51 52 // Need to enforce the padding not to break the existing field alignments. 53 // It is sufficient to check against the largest type size. 54 Flag::Error ContendedPaddingWidthConstraintFunc(intx value, bool verbose) { 55 if ((value % BytesPerLong) != 0) { 56 CommandLineError::print(verbose, 57 "ContendedPaddingWidth (" INTX_FORMAT ") must be " 58 "a multiple of %d\n", 59 value, BytesPerLong); 60 return Flag::VIOLATES_CONSTRAINT; 61 } else { 62 return Flag::SUCCESS; 63 } 64 } 65 66 Flag::Error BiasedLockingBulkRebiasThresholdFunc(intx value, bool verbose) { 67 if (value > BiasedLockingBulkRevokeThreshold) { 68 CommandLineError::print(verbose, 69 "BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ") must be " 70 "less than or equal to BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ")\n", 71 value, BiasedLockingBulkRevokeThreshold); 72 return Flag::VIOLATES_CONSTRAINT; 73 } else { 74 return Flag::SUCCESS; 75 } 76 } 77 78 Flag::Error BiasedLockingStartupDelayFunc(intx value, bool verbose) { 79 if ((value % PeriodicTask::interval_gran) != 0) { 80 CommandLineError::print(verbose, 81 "BiasedLockingStartupDelay (" INTX_FORMAT ") must be " 82 "evenly divisible by PeriodicTask::interval_gran (" INTX_FORMAT ")\n", 83 value, PeriodicTask::interval_gran); 84 return Flag::VIOLATES_CONSTRAINT; 85 } else { 86 return Flag::SUCCESS; 87 } 88 } 89 90 Flag::Error BiasedLockingBulkRevokeThresholdFunc(intx value, bool verbose) { 91 if (value < BiasedLockingBulkRebiasThreshold) { 92 CommandLineError::print(verbose, 93 "BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ") must be " 94 "greater than or equal to BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ")\n", 95 value, BiasedLockingBulkRebiasThreshold); 96 return Flag::VIOLATES_CONSTRAINT; 97 } else if ((double)value/(double)BiasedLockingDecayTime > 0.1) { 98 CommandLineError::print(verbose, 99 "The ratio of BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ")" 100 " to BiasedLockingDecayTime (" INTX_FORMAT ") must be " 101 "less than or equal to 0.1\n", 102 value, BiasedLockingBulkRebiasThreshold); 103 return Flag::VIOLATES_CONSTRAINT; 104 } else { 105 return Flag::SUCCESS; 106 } 107 } 108 109 Flag::Error BiasedLockingDecayTimeFunc(intx value, bool verbose) { 110 if (BiasedLockingBulkRebiasThreshold/(double)value > 0.1) { 111 CommandLineError::print(verbose, 112 "The ratio of BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ")" 113 " to BiasedLockingDecayTime (" INTX_FORMAT ") must be " 114 "less than or equal to 0.1\n", 115 BiasedLockingBulkRebiasThreshold, value); 116 return Flag::VIOLATES_CONSTRAINT; 117 } else { 118 return Flag::SUCCESS; 119 } 120 } 121 122 Flag::Error PerfDataSamplingIntervalFunc(intx value, bool verbose) { 123 if ((value % PeriodicTask::interval_gran != 0)) { 124 CommandLineError::print(verbose, 125 "PerfDataSamplingInterval (" INTX_FORMAT ") must be " 126 "evenly divisible by PeriodicTask::interval_gran (" INTX_FORMAT ")\n", 127 value, PeriodicTask::interval_gran); 128 return Flag::VIOLATES_CONSTRAINT; 129 } else { 130 return Flag::SUCCESS; 131 } 132 }