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