1 /* 2 * Copyright (c) 2014, 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 import java.lang.reflect.Executable; 25 import java.lang.reflect.Method; 26 import java.util.Objects; 27 import java.util.concurrent.Callable; 28 29 /** 30 * @test LevelTransitionTest 31 * @library /testlibrary /../../test/lib /compiler/whitebox 32 * @build com.oracle.java.testlibrary.* TransitionsTestExecutor LevelTransitionTest 33 * @run main ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main/othervm/timeout=240 -Xmixed -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 35 * -XX:+WhiteBoxAPI -XX:+TieredCompilation 36 * -XX:CompileCommand=compileonly,SimpleTestCase$Helper::* 37 * -XX:CompileCommand=compileonly,ExtendedTestCase$CompileMethodHolder::* 38 * TransitionsTestExecutor LevelTransitionTest 39 * @summary Test the correctness of compilation level transitions for different methods 40 */ 41 public class LevelTransitionTest extends TieredLevelsTest { 42 /** Shows if method was profiled by being executed on levels 2 or 3 */ 43 protected boolean isMethodProfiled; 44 private int transitionCount; 45 46 public static void main(String[] args) throws Throwable { 47 assert (!CompilerWhiteBoxTest.skipOnTieredCompilation(false)); 48 49 CompilerWhiteBoxTest.main(LevelTransitionTest::new, args); 50 // run extended test cases 51 for (TestCase testCase : ExtendedTestCase.values()) { 52 new LevelTransitionTest(testCase).runTest(); 53 } 54 } 55 56 protected LevelTransitionTest(TestCase testCase) { 57 super(testCase); 58 isMethodProfiled = testCase.isOsr(); // OSR methods were already profiled by warmup 59 transitionCount = 0; 60 } 61 62 @Override 63 protected void test() throws Exception { 64 checkTransitions(); 65 deoptimize(); 66 printInfo(); 67 if (testCase.isOsr()) { 68 // deoptimization makes the following transitions be unstable 69 // methods go to level 3 before 4 because of uncommon_trap and reprofile 70 return; 71 } 72 checkTransitions(); 73 } 74 75 /** 76 * Makes and verifies transitions between compilation levels 77 */ 78 protected void checkTransitions() { 79 checkNotCompiled(); 80 boolean finish = false; 81 while (!finish) { 82 System.out.printf("Level transition #%d%n", ++transitionCount); 83 int newLevel; 84 int current = getCompLevel(); 85 int expected = getNextLevel(current); 86 if (current == expected) { 87 // if we are on expected level, just execute it more 88 // to ensure that the level won't change 89 System.out.printf("Method %s is already on expected level %d%n", method, expected); 90 compile(); 91 newLevel = getCompLevel(); 92 finish = true; 93 } else { 94 newLevel = changeCompLevel(); 95 finish = false; 96 } 97 System.out.printf("Method %s is compiled on level %d. Expected level is %d%n", method, newLevel, expected); 98 checkLevel(expected, newLevel); 99 printInfo(); 100 }; 101 } 102 103 /** 104 * Gets next expected level for the test case on each transition. 105 * 106 * @param currentLevel a level the test case is compiled on 107 * @return expected compilation level 108 */ 109 protected int getNextLevel(int currentLevel) { 110 int nextLevel = currentLevel; 111 switch (currentLevel) { 112 case CompilerWhiteBoxTest.COMP_LEVEL_NONE: 113 nextLevel = isMethodProfiled ? CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION 114 : CompilerWhiteBoxTest.COMP_LEVEL_FULL_PROFILE; 115 break; 116 case CompilerWhiteBoxTest.COMP_LEVEL_LIMITED_PROFILE: 117 case CompilerWhiteBoxTest.COMP_LEVEL_FULL_PROFILE: 118 nextLevel = CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION; 119 isMethodProfiled = true; 120 break; 121 } 122 nextLevel = isTrivial() ? CompilerWhiteBoxTest.COMP_LEVEL_SIMPLE : nextLevel; 123 return Math.min(nextLevel, CompilerWhiteBoxTest.TIERED_STOP_AT_LEVEL); 124 } 125 126 /** 127 * Determines if tested method should be handled as trivial 128 * 129 * @return {@code true} for trivial methods, {@code false} otherwise 130 */ 131 protected boolean isTrivial() { 132 return testCase == ExtendedTestCase.ACCESSOR_TEST 133 || testCase == SimpleTestCase.METHOD_TEST 134 || testCase == SimpleTestCase.STATIC_TEST 135 || (testCase == ExtendedTestCase.TRIVIAL_CODE_TEST && isMethodProfiled); 136 } 137 138 /** 139 * Invokes {@linkplain #method} until its compilation level is changed. 140 * Note that if the level won't change, it will be an endless loop 141 * 142 * @return compilation level the {@linkplain #method} was compiled on 143 */ 144 protected int changeCompLevel() { 145 int currentLevel = getCompLevel(); 146 int newLevel = currentLevel; 147 int result = 0; 148 while (currentLevel == newLevel) { 149 result = compile(1); 150 if (WHITE_BOX.isMethodCompiled(method, testCase.isOsr())) { 151 newLevel = getCompLevel(); 152 } 153 } 154 return newLevel; 155 } 156 157 protected static class Helper { 158 /** 159 * Gets method from a specified class using its name 160 * 161 * @param aClass type method belongs to 162 * @param name the name of the method 163 * @return {@link Method} that represents corresponding class method 164 */ 165 public static Method getMethod(Class<?> aClass, String name) { 166 Method method; 167 try { 168 method = aClass.getDeclaredMethod(name); 169 } catch (NoSuchMethodException e) { 170 throw new Error("TESTBUG: Unable to get method " + name, e); 171 } 172 return method; 173 } 174 175 /** 176 * Gets {@link Callable} that invokes given method from the given object 177 * 178 * @param object the object the specified method is invoked from 179 * @param name the name of the method 180 */ 181 public static Callable<Integer> getCallable(Object object, String name) { 182 Method method = getMethod(object.getClass(), name); 183 return () -> { 184 try { 185 return Objects.hashCode(method.invoke(object)); 186 } catch (ReflectiveOperationException e) { 187 throw new Error("TESTBUG: Invocation failure", e); 188 } 189 }; 190 } 191 } 192 } 193 194 enum ExtendedTestCase implements CompilerWhiteBoxTest.TestCase { 195 ACCESSOR_TEST("accessor"), 196 NONTRIVIAL_METHOD_TEST("nonTrivialMethod"), 197 TRIVIAL_CODE_TEST("trivialCode"); 198 199 private final Executable executable; 200 private final Callable<Integer> callable; 201 202 @Override 203 public Executable getExecutable() { 204 return executable; 205 } 206 207 @Override 208 public Callable<Integer> getCallable() { 209 return callable; 210 } 211 212 @Override 213 public boolean isOsr() { 214 return false; 215 } 216 217 private ExtendedTestCase(String methodName) { 218 this.executable = LevelTransitionTest.Helper.getMethod(CompileMethodHolder.class, methodName); 219 this.callable = LevelTransitionTest.Helper.getCallable(new CompileMethodHolder(), methodName); 220 } 221 222 private static class CompileMethodHolder { 223 private final int iter = 10; 224 private int field = 42; 225 226 /** Non-trivial method for threshold policy: contains loops */ 227 public int nonTrivialMethod() { 228 int acc = 0; 229 for (int i = 0; i < iter; i++) { 230 acc += i; 231 } 232 return acc; 233 } 234 235 /** Field accessor method */ 236 public int accessor() { 237 return field; 238 } 239 240 /** Method considered as trivial by amount of code */ 241 public int trivialCode() { 242 int var = 0xBAAD_C0DE; 243 var *= field; 244 return var; 245 } 246 } 247 }