146 lines
5.6 KiB
Java
146 lines
5.6 KiB
Java
/*
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* Copyright (c) 2024, 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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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.ArrayList;
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/**
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* @test
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* @bug 8340313
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* @summary Test that concurrent patching of oop immediates is thread-safe in C1.
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* @run main/othervm/timeout=480 -Xcomp -XX:CompileCommand=compileonly,TestConcurrentPatching::* -XX:TieredStopAtLevel=1 TestConcurrentPatching
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*/
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class MyClass { }
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class Holder {
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public static final MyClass OBJ1 = null;
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public static final MyClass OBJ2 = null;
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public static final MyClass OBJ3 = null;
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public static final MyClass OBJ4 = null;
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public static final MyClass OBJ5 = null;
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public static final MyClass OBJ6 = null;
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public static final MyClass OBJ7 = null;
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public static final MyClass OBJ8 = null;
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public static final MyClass OBJ9 = null;
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public static final MyClass OBJ10 = null;
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public static final MyClass OBJ11 = null;
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public static final MyClass OBJ12 = null;
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public static final MyClass OBJ13 = null;
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public static final MyClass OBJ14 = null;
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public static final MyClass OBJ15 = null;
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public static final MyClass OBJ16 = null;
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public static final MyClass OBJ17 = null;
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public static final MyClass OBJ18 = null;
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public static final MyClass OBJ19 = null;
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public static final MyClass OBJ20 = null;
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}
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public class TestConcurrentPatching {
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// Increase to 100_000 for a good chance of reproducing the issue with a single run
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static final int ITERATIONS = 1000;
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static Object field;
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// 'Holder' class is unloaded on first execution and therefore field
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// accesses require patching when the method is C1 compiled (with -Xcomp).
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public static void test() {
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field = Holder.OBJ1;
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field = Holder.OBJ2;
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field = Holder.OBJ3;
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field = Holder.OBJ4;
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field = Holder.OBJ5;
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field = Holder.OBJ6;
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field = Holder.OBJ7;
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field = Holder.OBJ8;
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field = Holder.OBJ9;
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field = Holder.OBJ10;
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field = Holder.OBJ11;
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field = Holder.OBJ12;
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field = Holder.OBJ13;
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field = Holder.OBJ14;
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field = Holder.OBJ15;
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field = Holder.OBJ16;
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field = Holder.OBJ17;
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field = Holder.OBJ18;
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field = Holder.OBJ19;
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field = Holder.OBJ20;
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}
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// Appendix of invokedynamic call sites is unloaded on first execution and
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// therefore requires patching when the method is C1 compiled (with -Xcomp).
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public static void testIndy() throws Throwable {
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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field = (Runnable) () -> { };
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}
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// Run 'test' by multiple threads to trigger concurrent patching of field accesses
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static void runWithThreads(Method method) {
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ArrayList<Thread> threads = new ArrayList<>();
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for (int threadIdx = 0; threadIdx < 10; threadIdx++) {
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threads.add(new Thread(() -> {
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try {
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method.invoke(null);
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} catch (Exception e) {
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throw new IllegalStateException(e);
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}
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}));
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}
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threads.forEach(Thread::start);
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threads.forEach(t -> {
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try {
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t.join();
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} catch (Throwable e) {
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throw new IllegalStateException(e);
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}
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});
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}
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public static void main(String[] args) throws Exception {
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Class<?> thisClass = TestConcurrentPatching.class;
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ClassLoader defaultLoader = thisClass.getClassLoader();
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URL classesDir = thisClass.getProtectionDomain().getCodeSource().getLocation();
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// Load the test class multiple times with a separate class loader to make sure
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// that the 'Holder' class is unloaded for each compilation of method 'test'
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// and that the appendix of the invokedynamic call site is unloaded for each
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// compilation of method 'testIndy'.
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for (int i = 0; i < ITERATIONS; ++i) {
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URLClassLoader myLoader = URLClassLoader.newInstance(new URL[] {classesDir}, defaultLoader.getParent());
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Class<?> testClass = Class.forName(thisClass.getCanonicalName(), true, myLoader);
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runWithThreads(testClass.getDeclaredMethod("test"));
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runWithThreads(testClass.getDeclaredMethod("testIndy"));
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}
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}
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}
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