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1 /* |
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2 * Copyright (c) 2019 SAP SE. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /** |
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25 * @test |
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26 * @bug 8230677 |
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27 * @summary Test JVMTI's GetOwnedMonitorStackDepthInfo with scalar replaced objects and eliminated locks on stack (optimizations based on escape analysis). |
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28 * @comment Without RFE 8227745 escape analysis needs to be switched off to pass the test. For the implementation of RFE 8227745 it serves as a regression test. |
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29 * @requires (vm.compMode != "Xcomp" & vm.compiler2.enabled) |
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30 * @library /test/lib |
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31 * @compile GetOwnedMonitorStackDepthInfoWithEATest.java |
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32 * @run main/othervm/native |
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33 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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34 * -XX:+UnlockDiagnosticVMOptions |
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35 * -Xms32m -Xmx32m |
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36 * -XX:CompileCommand=dontinline,*::dontinline_* |
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37 * -XX:+PrintCompilation |
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38 * -XX:+PrintInlining |
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39 * -XX:-TieredCompilation |
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40 * -Xbatch |
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41 * -XX:CICompilerCount=1 |
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42 * -XX:+DoEscapeAnalysis -XX:+EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking |
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43 * GetOwnedMonitorStackDepthInfoWithEATest |
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44 * @run main/othervm/native |
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45 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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46 * -XX:+UnlockDiagnosticVMOptions |
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47 * -Xms32m -Xmx32m |
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48 * -XX:CompileCommand=dontinline,*::dontinline_* |
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49 * -XX:+PrintCompilation |
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50 * -XX:+PrintInlining |
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51 * -XX:-TieredCompilation |
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52 * -Xbatch |
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53 * -XX:CICompilerCount=1 |
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54 * -XX:+DoEscapeAnalysis -XX:+EliminateAllocations -XX:-EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking -XX:-UseOptoBiasInlining |
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55 * GetOwnedMonitorStackDepthInfoWithEATest |
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56 * @run main/othervm/native |
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57 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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58 * -XX:+UnlockDiagnosticVMOptions |
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59 * -Xms32m -Xmx32m |
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60 * -XX:CompileCommand=dontinline,*::dontinline_* |
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61 * -XX:+PrintCompilation |
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62 * -XX:+PrintInlining |
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63 * -XX:-TieredCompilation |
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64 * -Xbatch |
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65 * -XX:CICompilerCount=1 |
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66 * -XX:+DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking |
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67 * GetOwnedMonitorStackDepthInfoWithEATest |
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68 * @run main/othervm/native |
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69 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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70 * -XX:+UnlockDiagnosticVMOptions |
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71 * -Xms32m -Xmx32m |
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72 * -XX:CompileCommand=dontinline,*::dontinline_* |
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73 * -XX:+PrintCompilation |
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74 * -XX:+PrintInlining |
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75 * -XX:-TieredCompilation |
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76 * -Xbatch |
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77 * -XX:CICompilerCount=1 |
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78 * -XX:-DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:+UseBiasedLocking |
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79 * GetOwnedMonitorStackDepthInfoWithEATest |
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80 * @run main/othervm/native |
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81 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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82 * -XX:+UnlockDiagnosticVMOptions |
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83 * -Xms32m -Xmx32m |
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84 * -XX:CompileCommand=dontinline,*::dontinline_* |
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85 * -XX:+PrintCompilation |
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86 * -XX:+PrintInlining |
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87 * -XX:-TieredCompilation |
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88 * -Xbatch |
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89 * -XX:CICompilerCount=1 |
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90 * -XX:+DoEscapeAnalysis -XX:+EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:-UseBiasedLocking |
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91 * GetOwnedMonitorStackDepthInfoWithEATest |
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92 * @run main/othervm/native |
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93 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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94 * -XX:+UnlockDiagnosticVMOptions |
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95 * -Xms32m -Xmx32m |
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96 * -XX:CompileCommand=dontinline,*::dontinline_* |
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97 * -XX:+PrintCompilation |
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98 * -XX:+PrintInlining |
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99 * -XX:-TieredCompilation |
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100 * -Xbatch |
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101 * -XX:CICompilerCount=1 |
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102 * -XX:+DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:-UseBiasedLocking |
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103 * GetOwnedMonitorStackDepthInfoWithEATest |
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104 * @run main/othervm/native |
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105 * -agentlib:GetOwnedMonitorStackDepthInfoWithEATest |
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106 * -XX:+UnlockDiagnosticVMOptions |
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107 * -Xms32m -Xmx32m |
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108 * -XX:CompileCommand=dontinline,*::dontinline_* |
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109 * -XX:+PrintCompilation |
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110 * -XX:+PrintInlining |
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111 * -XX:-TieredCompilation |
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112 * -Xbatch |
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113 * -XX:CICompilerCount=1 |
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114 * -XX:-DoEscapeAnalysis -XX:-EliminateAllocations -XX:+EliminateLocks -XX:+EliminateNestedLocks -XX:-UseBiasedLocking |
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115 * GetOwnedMonitorStackDepthInfoWithEATest |
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116 */ |
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117 |
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118 import jdk.test.lib.Asserts; |
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119 |
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120 public class GetOwnedMonitorStackDepthInfoWithEATest { |
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121 |
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122 public static final int COMPILE_THRESHOLD = 20000; |
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123 |
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124 /** |
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125 * Native wrapper arround JVMTI's GetOwnedMonitorStackDepthInfo(). |
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126 * @param t The thread for which the owned monitors information should be retrieved. |
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127 * @param ownedMonitors Array filled in by the call with the objects associated |
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128 * with the monitors owned by the given thread. |
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129 * @param depths Per owned monitor the depth of the frame were it was locked. |
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130 * Filled in by the call |
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131 * @return Number of monitors owned by the given thread. |
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132 */ |
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133 public static native int getOwnedMonitorStackDepthInfo(Thread t, Object[] ownedMonitors, int[] depths); |
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134 |
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135 public static void main(String[] args) throws Exception { |
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136 new GetOwnedMonitorStackDepthInfoWithEATest().runTest(); |
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137 } |
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138 |
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139 public void runTest() throws Exception { |
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140 new TestCase_1().run(); |
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141 new TestCase_2().run(); |
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142 } |
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143 |
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144 public static abstract class TestCaseBase implements Runnable { |
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145 |
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146 public long checkSum; |
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147 public boolean doLoop; |
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148 public volatile long loopCount; |
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149 public volatile boolean targetIsInLoop; |
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150 |
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151 public void run() { |
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152 try { |
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153 msgHL("Executing test case " + getClass().getName()); |
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154 warmUp(); |
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155 runTest(); |
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156 } catch (Exception e) { |
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157 Asserts.fail("Unexpected Exception", e); |
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158 } |
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159 } |
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160 |
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161 public void warmUp() { |
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162 int callCount = COMPILE_THRESHOLD + 1000; |
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163 doLoop = true; |
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164 while (callCount-- > 0) { |
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165 dontinline_testMethod(); |
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166 } |
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167 } |
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168 |
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169 public abstract void runTest() throws Exception; |
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170 public abstract void dontinline_testMethod(); |
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171 |
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172 public long dontinline_endlessLoop() { |
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173 long cs = checkSum; |
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174 while (doLoop && loopCount-- > 0) { |
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175 targetIsInLoop = true; |
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176 checkSum += checkSum % ++cs; |
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177 } |
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178 loopCount = 3; |
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179 targetIsInLoop = false; |
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180 return checkSum; |
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181 } |
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182 |
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183 public void waitUntilTargetThreadHasEnteredEndlessLoop() throws Exception { |
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184 while(!targetIsInLoop) { |
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185 msg("Target has not yet entered the loop. Sleep 200ms."); |
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186 try { Thread.sleep(200); } catch (InterruptedException e) { /*ignore */ } |
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187 } |
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188 msg("Target has entered the loop."); |
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189 } |
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190 |
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191 public void terminateEndlessLoop() throws Exception { |
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192 msg("Terminate endless loop"); |
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193 do { |
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194 doLoop = false; |
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195 } while(targetIsInLoop); |
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196 } |
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197 |
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198 public void msg(String m) { |
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199 System.out.println(); |
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200 System.out.println("### " + m); |
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201 System.out.println(); |
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202 } |
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203 |
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204 public void msgHL(String m) { |
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205 System.out.println(); |
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206 System.out.println("#####################################################"); |
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207 System.out.println("### " + m); |
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208 System.out.println("###"); |
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209 System.out.println(); |
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210 } |
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211 } |
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212 |
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213 /** |
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214 * Starts target thread T and then queries monitor information for T using JVMTI's GetOwnedMonitorStackDepthInfo(). |
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215 * With escape analysis enabled the jit compiled method {@link #dontinline_testMethod()} has |
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216 * scalar replaced objects with eliminated (nested) locking in scope when the monitor |
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217 * information is retrieved. Effectively the objects escape through the JVMTI call. This works |
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218 * only with RFE 8227745. Without it escape analysis needs to be disabled. |
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219 */ |
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220 public static class TestCase_1 extends TestCaseBase { |
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221 |
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222 public void runTest() throws Exception { |
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223 loopCount = 1L << 62; // endless loop |
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224 Thread t1 = new Thread(() -> dontinline_testMethod(), "Target Thread"); |
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225 try { |
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226 t1.start(); |
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227 waitUntilTargetThreadHasEnteredEndlessLoop(); |
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228 int expectedMonitorCount = 1; |
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229 int resultSize = expectedMonitorCount + 3; |
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230 Object[] ownedMonitors = new Object[resultSize]; |
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231 int[] depths = new int[resultSize]; |
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232 msg("Get monitor info"); |
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233 int monitorCount = getOwnedMonitorStackDepthInfo(t1, ownedMonitors, depths); |
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234 Asserts.assertGreaterThanOrEqual(monitorCount, 0, "getOwnedMonitorsFor() call failed"); |
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235 msg("Monitor info:"); |
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236 for (int i = 0; i < monitorCount; i++) { |
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237 System.out.println(i + ": cls=" + (ownedMonitors[i] != null ? ownedMonitors[i].getClass() : null) + " depth=" + depths[i]); |
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238 } |
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239 Asserts.assertEQ(monitorCount, expectedMonitorCount, "unexpected monitor count returned by getOwnedMonitorsFor()"); |
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240 Asserts.assertNotNull(ownedMonitors[0]); |
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241 Asserts.assertSame(ownedMonitors[0].getClass(), LockCls.class); |
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242 Asserts.assertEQ(depths[0], 1, "unexpected depth for owned monitor at index 0"); |
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243 } finally { |
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244 terminateEndlessLoop(); |
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245 t1.join(); |
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246 } |
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247 } |
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248 |
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249 public void dontinline_testMethod() { |
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250 LockCls l1 = new LockCls(); // to be scalar replaced |
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251 synchronized (l1) { |
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252 inlinedTestMethodWithNestedLocking(l1); |
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253 } |
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254 } |
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255 |
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256 public void inlinedTestMethodWithNestedLocking(LockCls l1) { |
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257 synchronized (l1) { // nested |
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258 dontinline_endlessLoop(); |
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259 } |
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260 } |
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261 } |
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262 |
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263 /** |
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264 * Similar to {@link TestCase_1}. Additionally the target thread T has got eliminated locking |
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265 * for a synchronized method of a different type {@linkplain LockCls2}. |
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266 */ |
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267 public static class TestCase_2 extends TestCaseBase { |
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268 |
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269 public void runTest() throws Exception { |
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270 loopCount = 1L << 62; // endless loop |
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271 Thread t1 = new Thread(() -> dontinline_testMethod(), "Target Thread"); |
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272 t1.start(); |
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273 try { |
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274 waitUntilTargetThreadHasEnteredEndlessLoop(); |
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275 int expectedMonitorCount = 2; |
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276 int resultSize = expectedMonitorCount + 3; |
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277 Object[] ownedMonitors = new Object[resultSize]; |
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278 int[] depths = new int[resultSize]; |
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279 msg("Get monitor info"); |
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280 int monitorCount = getOwnedMonitorStackDepthInfo(t1, ownedMonitors, depths); |
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281 terminateEndlessLoop(); |
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282 t1.join(); |
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283 Asserts.assertGreaterThanOrEqual(monitorCount, 0, "getOwnedMonitorsFor() call failed"); |
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284 msg("Monitor info:"); |
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285 for (int i = 0; i < monitorCount; i++) { |
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286 System.out.println(i + ": cls=" + (ownedMonitors[i] != null ? ownedMonitors[i].getClass() : null) + " depth=" + depths[i]); |
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287 } |
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288 Asserts.assertEQ(monitorCount, expectedMonitorCount, "unexpected monitor count returned by getOwnedMonitorsFor()"); |
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289 Asserts.assertNotNull(ownedMonitors[0]); |
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290 Asserts.assertSame(ownedMonitors[0].getClass(), LockCls2.class); |
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291 Asserts.assertEQ(depths[0], 1, "unexpected depth for owned monitor at index 0"); |
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292 |
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293 Asserts.assertNotNull(ownedMonitors[1]); |
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294 Asserts.assertSame(ownedMonitors[1].getClass(), LockCls.class); |
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295 Asserts.assertEQ(depths[1], 3, "unexpected depth for owned monitor at index 1"); |
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296 } finally { |
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297 terminateEndlessLoop(); |
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298 t1.join(); |
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299 } |
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300 } |
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301 |
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302 public void dontinline_testMethod() { |
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303 LockCls l1 = new LockCls(); |
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304 synchronized (l1) { |
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305 inlinedTestMethodWithNestedLocking(l1); |
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306 } |
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307 } |
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308 |
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309 public void inlinedTestMethodWithNestedLocking(LockCls l1) { |
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310 synchronized (l1) { |
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311 dontinline_testMethod2(); |
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312 } |
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313 } |
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314 |
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315 public void dontinline_testMethod2() { |
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316 // Call synchronized method. Receiver of the call will be scalar replaced, |
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317 // and locking will be eliminated. Here we use a different type. |
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318 new LockCls2().inline_synchronized_testMethod(this); |
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319 } |
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320 } |
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321 |
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322 public static class LockCls { |
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323 } |
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324 |
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325 public static class LockCls2 { |
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326 public synchronized void inline_synchronized_testMethod(TestCaseBase testCase) { |
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327 testCase.dontinline_endlessLoop(); |
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328 } |
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329 } |
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330 } |