1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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.
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  23 
  24 /*
  25  * @test IsMethodCompilableTest
  26  * @bug 8007270 8006683 8007288 8022832
  27  * @library /testlibrary /test/lib
  28  * @modules java.base/sun.misc
  29  *          java.management
  30  * @build jdk.test.lib.* sun.hotspot.WhiteBox
  31  * @build IsMethodCompilableTest
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main ClassFileInstaller jdk.test.lib.Platform
  35  * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -Xmixed -XX:-TieredCompilation -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:PerMethodRecompilationCutoff=3 -XX:CompileCommand=compileonly,SimpleTestCase$Helper::* IsMethodCompilableTest
  36  * @summary testing of WB::isMethodCompilable()
  37  * @author igor.ignatyev@oracle.com
  38  */
  39 
  40 import jdk.test.lib.Platform;
  41 
  42 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
  43     /**
  44      * Value of {@code -XX:PerMethodRecompilationCutoff}
  45      */
  46     protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
  47 
  48     static {
  49         long tmp = Long.parseLong(
  50                 getVMOption("PerMethodRecompilationCutoff", "400"));
  51         if (tmp == -1) {
  52             PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
  53         } else {
  54             PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
  55         }
  56     }
  57 
  58     public static void main(String[] args) throws Exception {
  59         CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
  60     }
  61 
  62     private IsMethodCompilableTest(TestCase testCase) {
  63         super(testCase);
  64         // to prevent inlining of #method
  65         WHITE_BOX.testSetDontInlineMethod(method, true);
  66     }
  67 
  68     /**
  69      * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
  70      * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
  71      * checks that WB::clearMethodState() clears no-compilable flags. Only
  72      * applicable to c2 compiled methods.
  73      *
  74      * @throws Exception if one of the checks fails.
  75      */
  76     @Override
  77     protected void test() throws Exception {
  78 
  79         // Only c2 compilations can be disabled through PerMethodRecompilationCutoff
  80         if (!Platform.isServer()) {
  81             return;
  82         }
  83 
  84         if (skipXcompOSR()) {
  85             return;
  86         }
  87         if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
  88             throw new RuntimeException(method + " must be compilable");
  89         }
  90         System.out.println("PerMethodRecompilationCutoff = "
  91                 + PER_METHOD_RECOMPILATION_CUTOFF);
  92         if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
  93             System.err.println(
  94                     "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
  95             return;
  96         }
  97 
  98         // deoptimize 'PerMethodRecompilationCutoff' times
  99         for (long attempts = 0, successes = 0;
 100                (successes < PER_METHOD_RECOMPILATION_CUTOFF)  &&
 101                (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
 102                isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
 103             if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
 104                 successes++;
 105             }
 106         }
 107 
 108         if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
 109             // in osr test case count of deopt maybe more than iterations
 110             throw new RuntimeException(method + " is not compilable after "
 111                     + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
 112         }
 113 
 114         // Now compile once more
 115         compileAndDeoptimize();
 116 
 117         if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
 118             throw new RuntimeException(method + " is still compilable after "
 119                     + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
 120         }
 121         checkNotCompiled();
 122         compile();
 123         waitBackgroundCompilation();
 124         checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
 125 
 126         // WB.clearMethodState() must reset no-compilable flags
 127         WHITE_BOX.clearMethodState(method);
 128         if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
 129             throw new RuntimeException(method
 130                     + " is not compilable after clearMethodState()");
 131         }
 132         compile();
 133         checkCompiled();
 134     }
 135 
 136     private int compileAndDeoptimize() throws Exception {
 137         compile();
 138         waitBackgroundCompilation();
 139         int compLevel = getCompLevel();
 140         deoptimize();
 141         return compLevel;
 142     }
 143 }