jdk-24/test/hotspot/jtreg/compiler/classUnloading/methodUnloading/TestOverloadCompileQueues.java

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/*
 * @test TestOverloadCompileQueues
 * @bug 8163511 8230402
 * @summary Test overloading the C1 and C2 compile queues with tasks.
 * @requires !vm.graal.enabled
 * @run main/othervm/timeout=300 -XX:-TieredCompilation -XX:CompileThreshold=2 -XX:CICompilerCount=1
 *                   compiler.classUnloading.methodUnloading.TestOverloadCompileQueues
 * @run main/othervm/timeout=300 -XX:TieredCompileTaskTimeout=1000 -XX:CompileThresholdScaling=0.001 -XX:CICompilerCount=2
 *                   compiler.classUnloading.methodUnloading.TestOverloadCompileQueues
 */

package compiler.classUnloading.methodUnloading;

import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;

public class TestOverloadCompileQueues {
    public static final int ITERS = 500; // Increase for longer stress testing
    public static final int ITERS_A = 1000; // Increase for longer stress testing

    public static int iArr[] = new int[100];

    // Some methods to fill up the compile queue
    public static void test0() { }
    public static void test1() { }
    public static void test2() { }
    public static void test3() { }
    public static void test4() { }
    public static void test5() { }
    public static void test6() { }
    public static void test7() { }
    public static void test8() { }
    public static void test9() { }
    public static void test10() { }
    public static void test11() { }
    public static void test12() { }
    public static void test13() { }
    public static void test14() { }
    public static void test15() { }
    public static void test16() { }
    public static void test17() { }
    public static void test18() { }
    public static void test19() { }

    // More methods that do some more complex things. Therefore, the compiler needs to spend some more time compiling them.
    // With 50 methods, a queue size of 10000 is also reached in the second run with TieredCompilation enabled.
    public static void testA0()  { Arrays.sort(iArr); }
    public static void testA1()  { Arrays.sort(iArr); }
    public static void testA2()  { Arrays.sort(iArr); }
    public static void testA3()  { Arrays.sort(iArr); }
    public static void testA4()  { Arrays.sort(iArr); }
    public static void testA5()  { Arrays.sort(iArr); }
    public static void testA6()  { Arrays.sort(iArr); }
    public static void testA7()  { Arrays.sort(iArr); }
    public static void testA8()  { Arrays.sort(iArr); }
    public static void testA9()  { Arrays.sort(iArr); }
    public static void testA10() { Arrays.sort(iArr); }
    public static void testA11() { Arrays.sort(iArr); }
    public static void testA12() { Arrays.sort(iArr); }
    public static void testA13() { Arrays.sort(iArr); }
    public static void testA14() { Arrays.sort(iArr); }
    public static void testA15() { Arrays.sort(iArr); }
    public static void testA16() { Arrays.sort(iArr); }
    public static void testA17() { Arrays.sort(iArr); }
    public static void testA18() { Arrays.sort(iArr); }
    public static void testA19() { Arrays.sort(iArr); }
    public static void testA20() { Arrays.sort(iArr); }
    public static void testA21() { Arrays.sort(iArr); }
    public static void testA22() { Arrays.sort(iArr); }
    public static void testA23() { Arrays.sort(iArr); }
    public static void testA24() { Arrays.sort(iArr); }
    public static void testA25() { Arrays.sort(iArr); }
    public static void testA26() { Arrays.sort(iArr); }
    public static void testA27() { Arrays.sort(iArr); }
    public static void testA28() { Arrays.sort(iArr); }
    public static void testA29() { Arrays.sort(iArr); }
    public static void testA30() { Arrays.sort(iArr); }
    public static void testA31() { Arrays.sort(iArr); }
    public static void testA32() { Arrays.sort(iArr); }
    public static void testA33() { Arrays.sort(iArr); }
    public static void testA34() { Arrays.sort(iArr); }
    public static void testA35() { Arrays.sort(iArr); }
    public static void testA36() { Arrays.sort(iArr); }
    public static void testA37() { Arrays.sort(iArr); }
    public static void testA38() { Arrays.sort(iArr); }
    public static void testA39() { Arrays.sort(iArr); }
    public static void testA40() { Arrays.sort(iArr); }
    public static void testA41() { Arrays.sort(iArr); }
    public static void testA42() { Arrays.sort(iArr); }
    public static void testA43() { Arrays.sort(iArr); }
    public static void testA44() { Arrays.sort(iArr); }
    public static void testA45() { Arrays.sort(iArr); }
    public static void testA46() { Arrays.sort(iArr); }
    public static void testA47() { Arrays.sort(iArr); }
    public static void testA48() { Arrays.sort(iArr); }
    public static void testA49() { Arrays.sort(iArr); }

    public static void main(String[] args) throws Throwable {
        run();
        runA();
    }

    public static void run() throws Throwable {
        Class<?> thisClass = TestOverloadCompileQueues.class;
        ClassLoader defaultLoader = thisClass.getClassLoader();
        URL classesDir = thisClass.getProtectionDomain().getCodeSource().getLocation();

        for (int i = 0; i < ITERS; ++i) {
            // Load test class with own class loader
            URLClassLoader myLoader = URLClassLoader.newInstance(new URL[] {classesDir}, defaultLoader.getParent());
            Class<?> testClass = Class.forName(thisClass.getCanonicalName(), true, myLoader);

            // Execute all test methods to trigger compilation and fill up compile queue
            for (int j = 1; j < 20; ++j) {
                Method method = testClass.getDeclaredMethod("test" + j);
                method.invoke(null);
                method.invoke(null);
            }

            // Unload dead classes from ealier iterations
            System.gc();
        }
    }

    public static void runA() throws Throwable {
        Class<?> thisClass = TestOverloadCompileQueues.class;
        ClassLoader defaultLoader = thisClass.getClassLoader();
        URL classesDir = thisClass.getProtectionDomain().getCodeSource().getLocation();

        for (int i = 0; i < ITERS_A; ++i) {
            // Load test class with own class loader
            URLClassLoader myLoader = URLClassLoader.newInstance(new URL[] {classesDir}, defaultLoader.getParent());
            Class<?> testClass = Class.forName(thisClass.getCanonicalName(), true, myLoader);

            // Execute all test methods to trigger compilation and fill up compile queue
            for (int j = 0; j < 50; ++j) {
                Method method = testClass.getDeclaredMethod("testA" + j);
                method.invoke(null);
                method.invoke(null);
            }
        }
    }
}