Java example source code file (MakeMethodNotCompilableTest.java)

This example Java source code file (MakeMethodNotCompilableTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

comp_level_full_optimization, comp_level_simple, compilerwhiteboxtest, complevel::complevel_any, makemethodnotcompilabletest, override, runtimeexception, string, testcase, tiered_compilation, tiered_stop_at_level, warning

The MakeMethodNotCompilableTest.java Java example source code

/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test MakeMethodNotCompilableTest
 * @bug 8012322 8006683 8007288 8022832
 * @library /testlibrary /testlibrary/whitebox
 * @build MakeMethodNotCompilableTest
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,TestCase$Helper::* MakeMethodNotCompilableTest
 * @summary testing of WB::makeMethodNotCompilable()
 * @author igor.ignatyev@oracle.com
 */
public class MakeMethodNotCompilableTest extends CompilerWhiteBoxTest {
    private int bci;
    public static void main(String[] args) throws Exception {
        if (args.length == 0) {
            for (TestCase test : TestCase.values()) {
                new MakeMethodNotCompilableTest(test).runTest();
            }
        } else {
            for (String name : args) {
                new MakeMethodNotCompilableTest(
                        TestCase.valueOf(name)).runTest();
            }
        }
    }

    public MakeMethodNotCompilableTest(TestCase testCase) {
        super(testCase);
        // to prevent inlining of #method
        WHITE_BOX.testSetDontInlineMethod(method, true);
    }

    /**
     * Tests {@code WB::makeMethodNotCompilable()} by calling it before
     * compilation and checking that method isn't compiled. Also
     * checks that WB::clearMethodState() clears no-compilable flags. For
     * tiered, additional checks for all available levels are conducted.
     *
     * @throws Exception if one of the checks fails.
     */
    @Override
    protected void test() throws Exception {
        if (testCase.isOsr && CompilerWhiteBoxTest.MODE.startsWith(
                "compiled ")) {
          System.err.printf("Warning: %s is not applicable in %s%n",
                testCase.name(), CompilerWhiteBoxTest.MODE);
          return;
        }
        checkNotCompiled();
        if (!isCompilable()) {
            throw new RuntimeException(method + " must be compilable");
        }

        bci = getBci();

        if (TIERED_COMPILATION) {
            final int tierLimit = TIERED_STOP_AT_LEVEL + 1;
            for (int testedTier = 1; testedTier < tierLimit; ++testedTier) {
                testTier(testedTier);
            }
            for (int testedTier = 1; testedTier < tierLimit; ++testedTier) {
                makeNotCompilable(testedTier);
                if (isCompilable(testedTier)) {
                    throw new RuntimeException(method
                            + " must be not compilable at level" + testedTier);
                }
                WHITE_BOX.enqueueMethodForCompilation(method, testedTier, bci);
                checkNotCompiled();

                if (!isCompilable()) {
                    System.out.println(method
                            + " is not compilable after level " + testedTier);
                }
            }
        } else {
            compile();
            checkCompiled();
            int compLevel = getCompLevel();
            deoptimize();
            makeNotCompilable(compLevel);
            if (isCompilable(COMP_LEVEL_ANY)) {
                throw new RuntimeException(method
                        + " must be not compilable at CompLevel::CompLevel_any,"
                        + " after it is not compilable at " + compLevel);
            }

            WHITE_BOX.clearMethodState(method);
            if (!isCompilable()) {
                throw new RuntimeException(method
                        + " is not compilable after clearMethodState()");
            }

            // nocompilable at opposite level must make no sense
            int oppositeLevel;
            if (isC1Compile(compLevel)) {
              oppositeLevel = COMP_LEVEL_FULL_OPTIMIZATION;
            } else {
              oppositeLevel = COMP_LEVEL_SIMPLE;
            }
            makeNotCompilable(oppositeLevel);

            if (!isCompilable(COMP_LEVEL_ANY)) {
                  throw new RuntimeException(method
                        + " must be compilable at CompLevel::CompLevel_any,"
                        + " even it is not compilable at opposite level ["
                        + compLevel + "]");
            }

            if (!isCompilable(compLevel)) {
                  throw new RuntimeException(method
                        + " must be compilable at level " + compLevel
                        + ", even it is not compilable at opposite level ["
                        + compLevel + "]");
            }
        }

        // clearing after tiered/non-tiered tests
        // WB.clearMethodState() must reset no-compilable flags
        WHITE_BOX.clearMethodState(method);
        if (!isCompilable()) {
            throw new RuntimeException(method
                    + " is not compilable after clearMethodState()");
        }

        makeNotCompilable();
        if (isCompilable()) {
            throw new RuntimeException(method + " must be not compilable");
        }

        compile();
        checkNotCompiled();
        if (isCompilable()) {
            throw new RuntimeException(method + " must be not compilable");
        }
        // WB.clearMethodState() must reset no-compilable flags
        WHITE_BOX.clearMethodState(method);
        if (!isCompilable()) {
            throw new RuntimeException(method
                    + " is not compilable after clearMethodState()");
        }
        compile();
        checkCompiled();
    }

    // separately tests each tier
    private void testTier(int testedTier) {
        if (!isCompilable(testedTier)) {
            throw new RuntimeException(method
                    + " is not compilable on start");
        }
        makeNotCompilable(testedTier);

        // tests for all other tiers
        for (int anotherTier = 1, tierLimit = TIERED_STOP_AT_LEVEL + 1;
                    anotherTier < tierLimit; ++anotherTier) {
            boolean isCompilable = isCompilable(anotherTier);
            if (sameCompile(testedTier, anotherTier)) {
                if (isCompilable) {
                    throw new RuntimeException(method
                            + " must be not compilable at level " + anotherTier
                            + ", if it is not compilable at " + testedTier);
                }
                WHITE_BOX.enqueueMethodForCompilation(method, anotherTier, bci);
                checkNotCompiled();
            } else {
                if (!isCompilable) {
                    throw new RuntimeException(method
                            + " must be compilable at level " + anotherTier
                            + ", even if it is not compilable at "
                            + testedTier);
                }
                WHITE_BOX.enqueueMethodForCompilation(method, anotherTier, bci);
                checkCompiled();
                deoptimize();
            }

            if (!isCompilable(COMP_LEVEL_ANY)) {
                throw new RuntimeException(method
                        + " must be compilable at 'CompLevel::CompLevel_any'"
                        + ", if it is not compilable only at " + testedTier);
            }
        }

        // clear state after test
        WHITE_BOX.clearMethodState(method);
        if (!isCompilable(testedTier)) {
            throw new RuntimeException(method
                    + " is not compilable after clearMethodState()");
        }
    }

    private boolean sameCompile(int level1, int level2) {
        if (level1 == level2) {
            return true;
        }
        if (isC1Compile(level1) && isC1Compile(level2)) {
            return true;
        }
        if (isC2Compile(level1) && isC2Compile(level2)) {
            return true;
        }
        return false;
    }

    private int getBci() {
        compile();
        checkCompiled();
        int result = WHITE_BOX.getMethodEntryBci(method);
        deoptimize();
        WHITE_BOX.clearMethodState(method);
        return result;
    }
}