1 /* 2 * Copyright (c) 2013, 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 27 * @library /testlibrary /testlibrary/whitebox 28 * @build IsMethodCompilableTest 29 * @run main ClassFileInstaller sun.hotspot.WhiteBox 30 * @run main/othervm/timeout=600 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI IsMethodCompilableTest 31 * @author igor.ignatyev@oracle.com 32 */ 33 public class IsMethodCompilableTest extends CompilerWhiteBoxTest { 34 protected static final long PER_METHOD_RECOMPILATION_CUTOFF; 35 36 static { 37 long tmp = Long.parseLong( 38 getVMOption("PerMethodRecompilationCutoff", "400")); 39 if (tmp == -1) { 40 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */; 41 } else { 42 PER_METHOD_RECOMPILATION_CUTOFF = 1 + (0xFFFFFFFFL & tmp); 43 } 44 } 45 46 public static void main(String[] args) throws Exception { 47 // to prevent inlining #method into #compile() 48 WHITE_BOX.setDontInlineMethod(METHOD, true); 49 new IsMethodCompilableTest().runTest(); 50 } 51 52 protected void test() throws Exception { 53 if (!WHITE_BOX.isMethodCompilable(METHOD)) { 54 throw new RuntimeException(METHOD + " must be compilable"); 55 } 56 System.out.println("PerMethodRecompilationCutoff = " 57 + PER_METHOD_RECOMPILATION_CUTOFF); 58 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) { 59 System.err.println( 60 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf"); 61 return; 62 } 63 64 // deoptimze 'PerMethodRecompilationCutoff' times and clear state 65 for (long i = 0L, n = PER_METHOD_RECOMPILATION_CUTOFF - 1; i < n; ++i) { 66 compileAndDeoptimaze(); 67 } 68 if (!WHITE_BOX.isMethodCompilable(METHOD)) { 69 throw new RuntimeException(METHOD + " is not compilable after " 70 + (PER_METHOD_RECOMPILATION_CUTOFF - 1) + " iterations"); 71 } 72 WHITE_BOX.clearMethodState(METHOD); 73 74 // deoptimze 'PerMethodRecompilationCutoff' + 1 times 75 long i; 76 for (i = 0L; i < PER_METHOD_RECOMPILATION_CUTOFF 77 && WHITE_BOX.isMethodCompilable(METHOD); ++i) { 78 compileAndDeoptimaze(); 79 } 80 if (i != PER_METHOD_RECOMPILATION_CUTOFF) { 81 throw new RuntimeException(METHOD + " is not compilable after " 82 + i + " iterations, but must only after " 83 + PER_METHOD_RECOMPILATION_CUTOFF); 84 } 85 if (WHITE_BOX.isMethodCompilable(METHOD)) { 86 throw new RuntimeException(METHOD + " is still compilable after " 87 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations"); 88 } 89 compile(); 90 checkNotCompiled(METHOD); 91 92 WHITE_BOX.clearMethodState(METHOD); 93 if (!WHITE_BOX.isMethodCompilable(METHOD)) { 94 throw new RuntimeException(METHOD 95 + " is compilable after clearMethodState()"); 96 } 97 compile(); 98 checkCompiled(METHOD); 99 } 100 101 private void compileAndDeoptimaze() throws Exception { 102 compile(); 103 waitBackgroundCompilation(METHOD); 104 WHITE_BOX.deoptimizeMethod(METHOD); 105 } 106 }