jdk-24/hotspot/test/compiler/whitebox/LockCompilationTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 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.
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/*
 * @test LockCompilationTest
 * @bug 8059624
 * @library /testlibrary /../../test/lib
 * @modules java.management
 * @build LockCompilationTest
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm/timeout=600 -Xbootclasspath/a:. -Xmixed -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,SimpleTestCase$Helper::* LockCompilationTest
 * @summary testing of WB::lock/unlockCompilation()
 */

import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

import com.oracle.java.testlibrary.Asserts;

public class LockCompilationTest extends CompilerWhiteBoxTest {
    public static void main(String[] args) throws Exception {
        CompilerWhiteBoxTest.main(LockCompilationTest::new, args);
    }

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

    protected void test() throws Exception {
        checkNotCompiled();

        System.out.println("locking compilation");
        WHITE_BOX.lockCompilation();

        try {
            System.out.println("trying to compile");
            compile();
            // to check if it works correctly w/ safepoints
            System.out.println("going to safepoint");
            WHITE_BOX.fullGC();
            waitBackgroundCompilation();
            Asserts.assertTrue(
                    WHITE_BOX.isMethodQueuedForCompilation(method),
                    method + " must be in queue");
            Asserts.assertFalse(
                    WHITE_BOX.isMethodCompiled(method, false),
                    method + " must be not compiled");
            Asserts.assertEQ(
                    WHITE_BOX.getMethodCompilationLevel(method, false), 0,
                    method + " comp_level must be == 0");
            Asserts.assertFalse(
                    WHITE_BOX.isMethodCompiled(method, true),
                    method + " must be not osr_compiled");
            Asserts.assertEQ(
                    WHITE_BOX.getMethodCompilationLevel(method, true), 0,
                    method + " osr_comp_level must be == 0");
        } finally {
            System.out.println("unlocking compilation");
            WHITE_BOX.unlockCompilation();
        }
        waitBackgroundCompilation();
        Asserts.assertFalse(
                WHITE_BOX.isMethodQueuedForCompilation(method),
                method + " must not be in queue");
    }
}