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         boolean madeNotCompilable = false;
  64 
  65         for (long i = 0; i < PER_METHOD_RECOMPILATION_CUTOFF; ++i) {
  66             compile();
  67             waitBackgroundCompilation(METHOD);
  68             WHITE_BOX.deoptimizeMethod(METHOD);
  69             if (!WHITE_BOX.isMethodCompilable(METHOD)) {
  70                 madeNotCompilable = true;
  71                 break;
  72             }
  73         }
  74         if (!madeNotCompilable) {
  75             throw new RuntimeException(METHOD + " is still compilable after "
  76                     + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
  77         }
  78         compile();
  79         if (WHITE_BOX.isMethodCompiled(METHOD)) {
  80             printInfo(METHOD);
  81             throw new RuntimeException(
  82                     METHOD + " is not compilable but compiled");
  83         }
  84     }
  85 }