Mercurial > hg > graal-compiler
view graal/com.oracle.graal.compiler.ptx.test/src/com/oracle/graal/compiler/ptx/test/PTXMethodInvalidation2Test.java @ 15178:0c53453c4d5e
mx: improved jmh command to (a) look for JMH benchmarks in ../java-benchmarks, (b) omit building benchmarks if they are up to date and (c) offer better message with 'mx help jmh'
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 17 Apr 2014 01:36:49 +0200 |
parents | 2f944a810dd4 |
children | 1daaa2c62142 |
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/* * Copyright (c) 2013, 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 com.oracle.graal.compiler.ptx.test; import java.lang.ref.*; import org.junit.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.hotspot.ptx.*; import com.oracle.graal.nodes.*; /** * A full GC on HotSpot will unload an nmethod that contains an embedded oop which is the only * reference to its referent. The nmethod created for a {@linkplain PTXWrapperBuilder PTX kernel * wrapper} has an embedded oop referring to a {@link HotSpotNmethod} object associated with the * nmethod for the installed PTX kernel. This embedded oop is a weak reference as described above so * there must be another strong reference from the wrapper to the {@link HotSpotNmethod} object. */ public class PTXMethodInvalidation2Test extends PTXTest { @Test public void test() { test("testSnippet", 100); } @Override protected InstalledCode getCode(ResolvedJavaMethod method, StructuredGraph graph) { InstalledCode code = super.getCode(method, graph); // Try hard to force a full GC int attempts = 0; WeakReference<Object> ref = new WeakReference<>(new Object()); while (ref.get() != null) { System.gc(); // Give up after 1000 attempts Assume.assumeTrue(++attempts < 1000); } Assert.assertFalse(code.getStart() == 0L); return code; } int f = 42; public int testSnippet(int delta) { return f + delta; } }