| /* |
| * Copyright (c) 2014, 2016, 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. |
| * |
| */ |
| |
| package compiler.codecache.stress; |
| |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.ByteCodeLoader; |
| import jdk.test.lib.wrappers.InfiniteLoop; |
| import jdk.test.lib.Utils; |
| import sun.hotspot.WhiteBox; |
| |
| import java.io.BufferedInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Random; |
| import java.util.concurrent.Callable; |
| |
| public final class Helper { |
| public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); |
| public static final Random RNG = Utils.getRandomInstance(); |
| |
| private static final long THRESHOLD = WHITE_BOX.getIntxVMFlag("CompileThreshold"); |
| private static final String TEST_CASE_IMPL_CLASS_NAME = "compiler.codecache.stress.Helper$TestCaseImpl"; |
| private static byte[] CLASS_DATA; |
| static { |
| try { |
| CLASS_DATA = loadClassData(TEST_CASE_IMPL_CLASS_NAME); |
| } catch (IOException e) { |
| throw new Error("TESTBUG: cannot load class byte code " + TEST_CASE_IMPL_CLASS_NAME, e); |
| } |
| } |
| |
| private Helper() { |
| } |
| |
| public static void startInfiniteLoopThread(Runnable action) { |
| startInfiniteLoopThread(action, 0L); |
| } |
| |
| public static void startInfiniteLoopThread(Runnable action, long millis) { |
| Thread t = new Thread(new InfiniteLoop(action, millis)); |
| t.setDaemon(true); |
| t.start(); |
| } |
| |
| public static int callMethod(Callable<Integer> callable, int expected) { |
| int result = 0; |
| for (int i = 0; i < THRESHOLD; ++i) { |
| try { |
| result = callable.call(); |
| } catch (Exception e) { |
| throw new AssertionError( |
| "Exception occurred during test method execution", e); |
| } |
| Asserts.assertEQ(result, expected, "Method returns unexpected value"); |
| } |
| return result; |
| } |
| |
| private static byte[] loadClassData(String name) throws IOException { |
| try (BufferedInputStream in = new BufferedInputStream( |
| ClassLoader.getSystemResourceAsStream(name.replace(".", "/") |
| + ".class"))) { |
| ByteArrayOutputStream result = new ByteArrayOutputStream(); |
| byte[] buffer = new byte[1024]; |
| int read; |
| while ((read = in.read(buffer)) != -1) { |
| result.write(buffer, 0, read); |
| } |
| return result.toByteArray(); |
| } |
| } |
| |
| public interface TestCase { |
| |
| public static TestCase get() { |
| try { |
| Class clazz = ByteCodeLoader.load( |
| TEST_CASE_IMPL_CLASS_NAME, CLASS_DATA); |
| return (TestCase) clazz.newInstance(); |
| } catch (ReflectiveOperationException e) { |
| throw new Error(String.format( |
| "TESTBUG: error while creating %s instance from reloaded class", |
| TEST_CASE_IMPL_CLASS_NAME), e); |
| } |
| } |
| |
| Callable<Integer> getCallable(); |
| int method(); |
| int expectedValue(); |
| } |
| |
| public static class TestCaseImpl implements TestCase { |
| private static final int RETURN_VALUE = 42; |
| private static final int RECURSION_DEPTH = 10; |
| private volatile int i; |
| |
| @Override |
| public Callable<Integer> getCallable() { |
| return () -> { |
| i = 0; |
| return method(); |
| }; |
| } |
| |
| @Override |
| public int method() { |
| ++i; |
| int result = RETURN_VALUE; |
| if (i < RECURSION_DEPTH) { |
| return result + method(); |
| } |
| return result; |
| } |
| |
| @Override |
| public int expectedValue() { |
| return RETURN_VALUE * RECURSION_DEPTH; |
| } |
| } |
| |
| } |