1 /*
   2  * Copyright (c) 2014, 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 /*
  26  * @test GetNMethodTest
  27  * @bug 8038240
  28  * @summary testing of WB::getNMethod()
  29  * @library /test/lib /
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @build sun.hotspot.WhiteBox
  33  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  34  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  35  * @run main/othervm -Xbootclasspath/a:. -Xmixed -XX:+UnlockDiagnosticVMOptions
  36  *                   -XX:+WhiteBoxAPI -XX:-UseCounterDecay
  37  *                   -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
  38  *                   compiler.whitebox.GetNMethodTest
  39  */
  40 
  41 package compiler.whitebox;
  42 
  43 import jdk.test.lib.Asserts;
  44 import sun.hotspot.code.BlobType;
  45 import sun.hotspot.code.NMethod;
  46 
  47 public class GetNMethodTest extends CompilerWhiteBoxTest {
  48     public static void main(String[] args) throws Exception {
  49         CompilerWhiteBoxTest.main(GetNMethodTest::new, args);
  50     }
  51 
  52     private GetNMethodTest(TestCase testCase) {
  53         super(testCase);
  54         // to prevent inlining of #method
  55         WHITE_BOX.testSetDontInlineMethod(method, true);
  56     }
  57 
  58     @Override
  59     protected void test() throws Exception {
  60         checkNotCompiled();
  61 
  62         compile();
  63         checkCompiled();
  64 
  65         NMethod nmethod = NMethod.get(method, testCase.isOsr());
  66         if (IS_VERBOSE) {
  67             System.out.println("nmethod = " + nmethod);
  68         }
  69         Asserts.assertNotNull(nmethod,
  70                 "nmethod of compiled method is null");
  71         Asserts.assertNotNull(nmethod.insts,
  72                 "nmethod.insts of compiled method is null");
  73         Asserts.assertGT(nmethod.insts.length, 0,
  74                 "compiled method's instructions is empty");
  75         Asserts.assertNotNull(nmethod.code_blob_type, "blob type is null");
  76         if (WHITE_BOX.getBooleanVMFlag("SegmentedCodeCache")) {
  77             Asserts.assertNE(nmethod.code_blob_type, BlobType.All);
  78             switch (nmethod.comp_level) {
  79             case 1:
  80             case 4:
  81                 checkBlockType(nmethod, BlobType.MethodNonProfiled);
  82                 break;
  83             case 2:
  84             case 3:
  85                 checkBlockType(nmethod, BlobType.MethodProfiled);
  86                 break;
  87             default:
  88                 throw new Error("unexpected comp level " + nmethod);
  89             }
  90         } else {
  91             Asserts.assertEQ(nmethod.code_blob_type, BlobType.All);
  92         }
  93 
  94         deoptimize();
  95         checkNotCompiled();
  96         nmethod = NMethod.get(method, testCase.isOsr());
  97         Asserts.assertNull(nmethod,
  98                 "nmethod of non-compiled method isn't null");
  99     }
 100 
 101     private void checkBlockType(NMethod nmethod, BlobType expectedType) {
 102         Asserts.assertEQ(nmethod.code_blob_type, expectedType,
 103                 String.format("blob_type[%s] for %d level isn't %s",
 104                         nmethod.code_blob_type, nmethod.comp_level, expectedType));
 105     }
 106 }