author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 42640 | hotspot/test/compiler/tiered/LevelTransitionTest.java@09dba077f1e7 |
child 48507 | 282262d5031b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2016, 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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* @test LevelTransitionTest |
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* @summary Test the correctness of compilation level transitions for different methods |
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* @library /test/lib / |
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* @modules java.base/jdk.internal.misc |
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* java.management |
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* |
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* @build sun.hotspot.WhiteBox |
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* @run driver ClassFileInstaller sun.hotspot.WhiteBox |
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* sun.hotspot.WhiteBox$WhiteBoxPermission |
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* @run main/othervm/timeout=240 -Xmixed -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
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* -XX:+WhiteBoxAPI -XX:+TieredCompilation -XX:-UseCounterDecay |
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* -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::* |
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* -XX:CompileCommand=compileonly,compiler.tiered.LevelTransitionTest$ExtendedTestCase$CompileMethodHolder::* |
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* compiler.tiered.TransitionsTestExecutor |
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* compiler.tiered.LevelTransitionTest |
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*/ |
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package compiler.tiered; |
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import compiler.whitebox.CompilerWhiteBoxTest; |
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import compiler.whitebox.SimpleTestCase; |
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import java.lang.reflect.Executable; |
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import java.lang.reflect.Method; |
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import java.util.Objects; |
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import java.util.concurrent.Callable; |
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public class LevelTransitionTest extends TieredLevelsTest { |
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/** |
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* Shows if method was profiled by being executed on levels 2 or 3 |
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*/ |
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protected boolean isMethodProfiled; |
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private int transitionCount; |
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public static void main(String[] args) throws Throwable { |
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assert (!CompilerWhiteBoxTest.skipOnTieredCompilation(false)); |
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CompilerWhiteBoxTest.main(LevelTransitionTest::new, args); |
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// run extended test cases |
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for (TestCase testCase : ExtendedTestCase.values()) { |
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new LevelTransitionTest(testCase).runTest(); |
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} |
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} |
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protected LevelTransitionTest(TestCase testCase) { |
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super(testCase); |
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isMethodProfiled = testCase.isOsr(); // OSR methods were already profiled by warmup |
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transitionCount = 0; |
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} |
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@Override |
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protected void test() throws Exception { |
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checkTransitions(); |
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deoptimize(); |
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printInfo(); |
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if (testCase.isOsr()) { |
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// deoptimization makes the following transitions be unstable |
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// methods go to level 3 before 4 because of uncommon_trap and reprofile |
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return; |
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} |
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checkTransitions(); |
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} |
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|
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/** |
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* Makes and verifies transitions between compilation levels |
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*/ |
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protected void checkTransitions() throws Exception { |
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checkNotCompiled(); |
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boolean finish = false; |
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while (!finish) { |
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System.out.printf("Level transition #%d%n", ++transitionCount); |
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int newLevel; |
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int current = getCompLevel(); |
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int expected = getNextLevel(current); |
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if (current == expected) { |
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// if we are on expected level, just execute it more |
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// to ensure that the level won't change |
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System.out.printf("Method %s is already on expected level %d%n", method, expected); |
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compile(); |
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newLevel = getCompLevel(); |
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finish = true; |
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} else { |
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newLevel = changeCompLevel(); |
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finish = false; |
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} |
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System.out.printf("Method %s is compiled on level %d. Expected level is %d%n", method, newLevel, expected); |
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checkLevel(expected, newLevel); |
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printInfo(); |
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} |
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; |
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} |
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/** |
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* Gets next expected level for the test case on each transition. |
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* |
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* @param currentLevel a level the test case is compiled on |
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* @return expected compilation level |
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*/ |
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protected int getNextLevel(int currentLevel) { |
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int nextLevel = currentLevel; |
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switch (currentLevel) { |
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case CompilerWhiteBoxTest.COMP_LEVEL_NONE: |
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nextLevel = isMethodProfiled ? CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION |
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: CompilerWhiteBoxTest.COMP_LEVEL_FULL_PROFILE; |
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break; |
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case CompilerWhiteBoxTest.COMP_LEVEL_LIMITED_PROFILE: |
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case CompilerWhiteBoxTest.COMP_LEVEL_FULL_PROFILE: |
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nextLevel = CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION; |
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isMethodProfiled = true; |
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134 |
break; |
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135 |
} |
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nextLevel = isTrivial() ? CompilerWhiteBoxTest.COMP_LEVEL_SIMPLE : nextLevel; |
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return Math.min(nextLevel, CompilerWhiteBoxTest.TIERED_STOP_AT_LEVEL); |
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138 |
} |
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139 |
|
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140 |
/** |
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141 |
* Determines if tested method should be handled as trivial |
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142 |
* |
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* @return {@code true} for trivial methods, {@code false} otherwise |
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144 |
*/ |
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145 |
protected boolean isTrivial() { |
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146 |
return testCase == ExtendedTestCase.ACCESSOR_TEST |
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147 |
|| testCase == SimpleTestCase.METHOD_TEST |
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148 |
|| testCase == SimpleTestCase.STATIC_TEST |
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149 |
|| (testCase == ExtendedTestCase.TRIVIAL_CODE_TEST && isMethodProfiled); |
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150 |
} |
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151 |
|
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152 |
/** |
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153 |
* Invokes {@linkplain #method} until its compilation level is changed. |
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154 |
* Note that if the level won't change, it will be an endless loop |
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155 |
* |
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156 |
* @return compilation level the {@linkplain #method} was compiled on |
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157 |
*/ |
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158 |
protected int changeCompLevel() { |
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159 |
int currentLevel = getCompLevel(); |
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int newLevel = currentLevel; |
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int result = 0; |
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while (currentLevel == newLevel) { |
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result = compile(1); |
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164 |
if (WHITE_BOX.isMethodCompiled(method, testCase.isOsr())) { |
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newLevel = getCompLevel(); |
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166 |
} |
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167 |
} |
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168 |
return newLevel; |
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169 |
} |
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170 |
|
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171 |
protected static class Helper { |
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172 |
/** |
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173 |
* Gets method from a specified class using its name |
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174 |
* |
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175 |
* @param aClass type method belongs to |
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176 |
* @param name the name of the method |
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177 |
* @return {@link Method} that represents corresponding class method |
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178 |
*/ |
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179 |
public static Method getMethod(Class<?> aClass, String name) { |
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180 |
Method method; |
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181 |
try { |
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182 |
method = aClass.getDeclaredMethod(name); |
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183 |
} catch (NoSuchMethodException e) { |
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184 |
throw new Error("TESTBUG: Unable to get method " + name, e); |
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185 |
} |
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186 |
return method; |
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187 |
} |
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|
188 |
|
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189 |
/** |
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190 |
* Gets {@link Callable} that invokes given method from the given object |
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191 |
* |
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192 |
* @param object the object the specified method is invoked from |
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193 |
* @param name the name of the method |
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194 |
*/ |
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195 |
public static Callable<Integer> getCallable(Object object, String name) { |
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196 |
Method method = getMethod(object.getClass(), name); |
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197 |
return () -> { |
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198 |
try { |
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199 |
return Objects.hashCode(method.invoke(object)); |
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200 |
} catch (ReflectiveOperationException e) { |
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201 |
throw new Error("TESTBUG: Invocation failure", e); |
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202 |
} |
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203 |
}; |
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204 |
} |
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205 |
} |
40059 | 206 |
|
207 |
private static enum ExtendedTestCase implements CompilerWhiteBoxTest.TestCase { |
|
208 |
ACCESSOR_TEST("accessor"), |
|
209 |
NONTRIVIAL_METHOD_TEST("nonTrivialMethod"), |
|
210 |
TRIVIAL_CODE_TEST("trivialCode"); |
|
211 |
||
212 |
private final Executable executable; |
|
213 |
private final Callable<Integer> callable; |
|
214 |
||
215 |
@Override |
|
216 |
public Executable getExecutable() { |
|
217 |
return executable; |
|
218 |
} |
|
28194
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|
219 |
|
40059 | 220 |
@Override |
221 |
public Callable<Integer> getCallable() { |
|
222 |
return callable; |
|
223 |
} |
|
28194
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|
224 |
|
40059 | 225 |
@Override |
226 |
public boolean isOsr() { |
|
227 |
return false; |
|
228 |
} |
|
229 |
||
230 |
private ExtendedTestCase(String methodName) { |
|
231 |
this.executable = LevelTransitionTest.Helper.getMethod(CompileMethodHolder.class, methodName); |
|
232 |
this.callable = LevelTransitionTest.Helper.getCallable(new CompileMethodHolder(), methodName); |
|
233 |
} |
|
28194
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234 |
|
40059 | 235 |
private static class CompileMethodHolder { |
236 |
private final int iter = 10; |
|
237 |
private int field = 42; |
|
238 |
||
239 |
/** |
|
240 |
* Non-trivial method for threshold policy: contains loops |
|
241 |
*/ |
|
242 |
public int nonTrivialMethod() { |
|
243 |
int acc = 0; |
|
244 |
for (int i = 0; i < iter; i++) { |
|
245 |
acc += i; |
|
246 |
} |
|
247 |
return acc; |
|
248 |
} |
|
28194
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249 |
|
40059 | 250 |
/** |
251 |
* Field accessor method |
|
252 |
*/ |
|
253 |
public int accessor() { |
|
254 |
return field; |
|
255 |
} |
|
28194
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|
256 |
|
40059 | 257 |
/** |
258 |
* Method considered as trivial by amount of code |
|
259 |
*/ |
|
260 |
public int trivialCode() { |
|
261 |
int var = 0xBAAD_C0DE; |
|
262 |
var *= field; |
|
263 |
return var; |
|
264 |
} |
|
265 |
} |
|
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266 |
} |
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267 |
|
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268 |
} |
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269 |