1 /* 2 * Copyright (c) 2013, 2015, 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 * @test IsMethodCompilableTest 26 * @bug 8007270 8006683 8007288 8022832 27 * @library /testlibrary /test/lib / 28 * @modules java.base/sun.misc 29 * java.management 30 * @build jdk.test.lib.* sun.hotspot.WhiteBox 31 * @build IsMethodCompilableTest 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main ClassFileInstaller jdk.test.lib.Platform 35 * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -Xmixed -XX:-TieredCompilation -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:PerMethodRecompilationCutoff=3 -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCase$Helper::* IsMethodCompilableTest 36 * @summary testing of WB::isMethodCompilable() 37 * @author igor.ignatyev@oracle.com 38 */ 39 40 import jdk.test.lib.Platform; 41 import compiler.whitebox.CompilerWhiteBoxTest; 42 43 public class IsMethodCompilableTest extends CompilerWhiteBoxTest { 44 /** 45 * Value of {@code -XX:PerMethodRecompilationCutoff} 46 */ 47 protected static final long PER_METHOD_RECOMPILATION_CUTOFF; 48 49 static { 50 long tmp = Long.parseLong( 51 getVMOption("PerMethodRecompilationCutoff", "400")); 52 if (tmp == -1) { 53 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */; 54 } else { 55 PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp); 56 } 57 } 58 59 public static void main(String[] args) throws Exception { 60 CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args); 61 } 62 63 private IsMethodCompilableTest(TestCase testCase) { 64 super(testCase); 65 // to prevent inlining of #method 66 WHITE_BOX.testSetDontInlineMethod(method, true); 67 } 68 69 /** 70 * Tests {@code WB::isMethodCompilable()} by recompilation of tested method 71 * 'PerMethodRecompilationCutoff' times and checks compilation status. Also 72 * checks that WB::clearMethodState() clears no-compilable flags. Only 73 * applicable to c2 compiled methods. 74 * 75 * @throws Exception if one of the checks fails. 76 */ 77 @Override 78 protected void test() throws Exception { 79 80 // Only c2 compilations can be disabled through PerMethodRecompilationCutoff 81 if (!Platform.isServer()) { 82 return; 83 } 84 85 if (skipXcompOSR()) { 86 return; 87 } 88 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) { 89 throw new RuntimeException(method + " must be compilable"); 90 } 91 System.out.println("PerMethodRecompilationCutoff = " 92 + PER_METHOD_RECOMPILATION_CUTOFF); 93 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) { 94 System.err.println( 95 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf"); 96 return; 97 } 98 99 // deoptimize 'PerMethodRecompilationCutoff' times 100 for (long attempts = 0, successes = 0; 101 (successes < PER_METHOD_RECOMPILATION_CUTOFF) && 102 (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) && 103 isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) { 104 if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) { 105 successes++; 106 } 107 } 108 109 if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) { 110 // in osr test case count of deopt maybe more than iterations 111 throw new RuntimeException(method + " is not compilable after " 112 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations"); 113 } 114 115 // Now compile once more 116 compileAndDeoptimize(); 117 118 if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) { 119 throw new RuntimeException(method + " is still compilable after " 120 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations"); 121 } 122 checkNotCompiled(); 123 compile(); 124 waitBackgroundCompilation(); 125 checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION); 126 127 // WB.clearMethodState() must reset no-compilable flags 128 WHITE_BOX.clearMethodState(method); 129 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) { 130 throw new RuntimeException(method 131 + " is not compilable after clearMethodState()"); 132 } 133 compile(); 134 checkCompiled(); 135 } 136 137 private int compileAndDeoptimize() throws Exception { 138 compile(); 139 waitBackgroundCompilation(); 140 int compLevel = getCompLevel(); 141 deoptimize(); 142 return compLevel; 143 } 144 }