1 /*
   2  * Copyright (c) 2015, 2019, 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
  26  * @bug 8136421
  27  * @requires vm.jvmci
  28  * @library /test/lib /
  29  * @library ../common/patches
  30  * @modules java.base/jdk.internal.misc
  31  * @modules java.base/jdk.internal.org.objectweb.asm
  32  *          java.base/jdk.internal.org.objectweb.asm.tree
  33  *          jdk.internal.vm.ci/jdk.vm.ci.hotspot
  34  *          jdk.internal.vm.ci/jdk.vm.ci.code
  35  *
  36  * @build jdk.internal.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper
  37  * @build sun.hotspot.WhiteBox
  38  *        compiler.jvmci.compilerToVM.DisassembleCodeBlobTest
  39  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  40  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  41  * @run main/othervm -Xbootclasspath/a:.
  42  *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  43  *                   -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
  44  *                   -XX:-BackgroundCompilation
  45  *                   compiler.jvmci.compilerToVM.DisassembleCodeBlobTest
  46  */
  47 
  48 package compiler.jvmci.compilerToVM;
  49 
  50 import jdk.test.lib.Asserts;
  51 import jdk.test.lib.Utils;
  52 import jdk.vm.ci.code.InstalledCode;
  53 import jdk.vm.ci.hotspot.CompilerToVMHelper;
  54 import sun.hotspot.code.NMethod;
  55 
  56 import java.util.List;
  57 
  58 public class DisassembleCodeBlobTest {
  59 
  60     public static void main(String[] args) {
  61         DisassembleCodeBlobTest test
  62                 = new DisassembleCodeBlobTest();
  63         List<CompileCodeTestCase> testCases
  64                 = CompileCodeTestCase.generate(/* bci = */ -1);
  65         testCases.forEach(test::check);
  66         testCases.stream().findAny().ifPresent(test::checkZero);
  67         test.checkNull();
  68     }
  69 
  70     private void checkNull() {
  71         Utils.runAndCheckException(
  72                 () -> { CompilerToVMHelper.disassembleCodeBlob(null); },
  73                 NullPointerException.class);
  74     }
  75 
  76     private void checkZero(CompileCodeTestCase testCase) {
  77         System.out.println("checkZero for " + testCase);
  78         testCase.deoptimize();
  79         InstalledCode installedCode = testCase.toInstalledCode();
  80         String str = CompilerToVMHelper.disassembleCodeBlob(installedCode);
  81         Asserts.assertNull(str, testCase
  82                 + " : non-null return value for invalid installCode");
  83     }
  84 
  85     private void check(CompileCodeTestCase testCase) {
  86         System.out.println(testCase);
  87         // to have a clean state
  88         NMethod nMethod = testCase.deoptimizeAndCompile();
  89         if (nMethod == null) {
  90             throw new Error(testCase + " : method is not compiled");
  91         }
  92         InstalledCode installedCode = testCase.toInstalledCode();
  93         String str1 = CompilerToVMHelper.disassembleCodeBlob(installedCode);
  94         if (str1 != null) {
  95             Asserts.assertGT(str1.length(), 0,
  96                    testCase +  " : returned string has to be non-zero length");
  97         }
  98         // The very first call to the disassembler contains a string specifying the
  99         // architecture: [Disassembling for mach='i386:x86-64']
 100         // Therefore compare strings 2 and 3.
 101         String str2 = CompilerToVMHelper.disassembleCodeBlob(installedCode);
 102         String str3 = CompilerToVMHelper.disassembleCodeBlob(installedCode);
 103         Asserts.assertEQ(str2, str3,
 104                 testCase + " : 3nd invocation returned different value from 2nd");
 105     }
 106 }