hotspot/test/compiler/whitebox/IsMethodCompilableTest.java
author iignatyev
Tue, 16 Apr 2013 10:04:01 -0700
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child 19282 9764b5a041b6
permissions -rw-r--r--
8011971: WB API doesn't accept j.l.reflect.Constructor Reviewed-by: kvn, vlivanov
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/*
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 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test IsMethodCompilableTest
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 * @bug 8007270
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 * @library /testlibrary /testlibrary/whitebox
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 * @build IsMethodCompilableTest
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 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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 * @run main/othervm/timeout=600 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI IsMethodCompilableTest
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 * @summary testing of WB::isMethodCompilable()
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 * @author igor.ignatyev@oracle.com
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 */
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public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
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    /**
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     * Value of {@code -XX:PerMethodRecompilationCutoff}
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     */
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    protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
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    static {
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        long tmp = Long.parseLong(
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                getVMOption("PerMethodRecompilationCutoff", "400"));
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        if (tmp == -1) {
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            PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
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        } else {
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            PER_METHOD_RECOMPILATION_CUTOFF = 1 + (0xFFFFFFFFL & tmp);
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        }
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    }
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    public static void main(String[] args) throws Exception {
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        for (TestCase test : TestCase.values()) {
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            new IsMethodCompilableTest(test).runTest();
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        }
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    }
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    public IsMethodCompilableTest(TestCase testCase) {
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        super(testCase);
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        // to prevent inlining of #method
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        WHITE_BOX.testSetDontInlineMethod(method, true);
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    }
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    /**
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     * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
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     * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
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     * checks that WB::clearMethodState() clears no-compilable flags.
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     *
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     * @throws Exception if one of the checks fails.
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     */
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    @Override
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    protected void test() throws Exception {
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        if (!WHITE_BOX.isMethodCompilable(method)) {
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            throw new RuntimeException(method + " must be compilable");
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        }
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        System.out.println("PerMethodRecompilationCutoff = "
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                + PER_METHOD_RECOMPILATION_CUTOFF);
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        if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
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            System.err.println(
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                    "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
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            return;
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        }
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        // deoptimize 'PerMethodRecompilationCutoff' times and clear state
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        for (long i = 0L, n = PER_METHOD_RECOMPILATION_CUTOFF - 1; i < n; ++i) {
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            compileAndDeoptimize();
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        }
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        if (!WHITE_BOX.isMethodCompilable(method)) {
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            throw new RuntimeException(method + " is not compilable after "
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                    + (PER_METHOD_RECOMPILATION_CUTOFF - 1) + " iterations");
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        }
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        WHITE_BOX.clearMethodState(method);
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        // deoptimize 'PerMethodRecompilationCutoff' + 1 times
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        long i;
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        for (i = 0L; i < PER_METHOD_RECOMPILATION_CUTOFF
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                && WHITE_BOX.isMethodCompilable(method); ++i) {
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            compileAndDeoptimize();
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        }
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        if (i != PER_METHOD_RECOMPILATION_CUTOFF) {
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            throw new RuntimeException(method + " is not compilable after "
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                    + i + " iterations, but must only after "
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                    + PER_METHOD_RECOMPILATION_CUTOFF);
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        }
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        if (WHITE_BOX.isMethodCompilable(method)) {
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            throw new RuntimeException(method + " is still compilable after "
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                    + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
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        }
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        compile();
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        checkNotCompiled();
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        // WB.clearMethodState() must reset no-compilable flags
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        WHITE_BOX.clearMethodState(method);
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        if (!WHITE_BOX.isMethodCompilable(method)) {
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            throw new RuntimeException(method
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                    + " is not compilable after clearMethodState()");
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        }
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        compile();
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        checkCompiled();
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    }
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    private void compileAndDeoptimize() throws Exception {
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        compile();
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        waitBackgroundCompilation();
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        WHITE_BOX.deoptimizeMethod(method);
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    }
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}