| /* |
| * Copyright (c) 2015, 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 |
| * @bug 8072016 |
| * @summary Infinite deoptimization/recompilation cycles in case of arraycopy with tightly coupled allocation |
| * @library /testlibrary /../../test/lib /compiler/whitebox |
| * @modules java.base/sun.misc |
| * java.management |
| * @build TestArrayCopyNoInitDeopt |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller com.oracle.java.testlibrary.Platform |
| * @run main/othervm -Xmixed -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:TypeProfileLevel=020 |
| * TestArrayCopyNoInitDeopt |
| * |
| */ |
| |
| |
| import sun.hotspot.WhiteBox; |
| import sun.hotspot.code.NMethod; |
| import com.oracle.java.testlibrary.Platform; |
| import java.lang.reflect.*; |
| |
| public class TestArrayCopyNoInitDeopt { |
| |
| public static int[] m1(Object src) { |
| if (src == null) return null; |
| int[] dest = new int[10]; |
| try { |
| System.arraycopy(src, 0, dest, 0, 10); |
| } catch (ArrayStoreException npe) { |
| } |
| return dest; |
| } |
| |
| static Object m2_src(Object src) { |
| return src; |
| } |
| |
| public static int[] m2(Object src) { |
| if (src == null) return null; |
| src = m2_src(src); |
| int[] dest = new int[10]; |
| try { |
| System.arraycopy(src, 0, dest, 0, 10); |
| } catch (ArrayStoreException npe) { |
| } |
| return dest; |
| } |
| |
| private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); |
| |
| static boolean deoptimize(Method method, Object src_obj) throws Exception { |
| for (int i = 0; i < 10; i++) { |
| method.invoke(null, src_obj); |
| if (!WHITE_BOX.isMethodCompiled(method)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static public void main(String[] args) throws Exception { |
| if (Platform.isServer()) { |
| int[] src = new int[10]; |
| Object src_obj = new Object(); |
| Method method_m1 = TestArrayCopyNoInitDeopt.class.getMethod("m1", Object.class); |
| Method method_m2 = TestArrayCopyNoInitDeopt.class.getMethod("m2", Object.class); |
| |
| // Warm up |
| for (int i = 0; i < 20000; i++) { |
| m1(src); |
| } |
| |
| // And make sure m1 is compiled by C2 |
| WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION); |
| |
| if (!WHITE_BOX.isMethodCompiled(method_m1)) { |
| throw new RuntimeException("m1 not compiled"); |
| } |
| |
| // should deoptimize for type check |
| if (!deoptimize(method_m1, src_obj)) { |
| throw new RuntimeException("m1 not deoptimized"); |
| } |
| |
| WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION); |
| |
| if (!WHITE_BOX.isMethodCompiled(method_m1)) { |
| throw new RuntimeException("m1 not recompiled"); |
| } |
| |
| if (deoptimize(method_m1, src_obj)) { |
| throw new RuntimeException("m1 deoptimized again"); |
| } |
| |
| // Same test as above but with speculative types |
| |
| // Warm up & make sure we collect type profiling |
| for (int i = 0; i < 20000; i++) { |
| m2(src); |
| } |
| |
| // And make sure m2 is compiled by C2 |
| WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION); |
| |
| if (!WHITE_BOX.isMethodCompiled(method_m2)) { |
| throw new RuntimeException("m2 not compiled"); |
| } |
| |
| // should deoptimize for speculative type check |
| if (!deoptimize(method_m2, src_obj)) { |
| throw new RuntimeException("m2 not deoptimized"); |
| } |
| |
| WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION); |
| |
| if (!WHITE_BOX.isMethodCompiled(method_m2)) { |
| throw new RuntimeException("m2 not recompiled"); |
| } |
| |
| // should deoptimize for actual type check |
| if (!deoptimize(method_m2, src_obj)) { |
| throw new RuntimeException("m2 not deoptimized"); |
| } |
| |
| WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION); |
| |
| if (!WHITE_BOX.isMethodCompiled(method_m2)) { |
| throw new RuntimeException("m2 not recompiled"); |
| } |
| |
| if (deoptimize(method_m2, src_obj)) { |
| throw new RuntimeException("m2 deoptimized again"); |
| } |
| } |
| } |
| } |