Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotNmethod.java @ 23357:b05ad394cfd5
Add ResolvedJavaType.isAllocationClonable
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 28 Apr 2016 13:07:46 -0700 |
parents | 1bbd4a7c274b |
children |
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/* * Copyright (c) 2011, 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. */ package jdk.vm.ci.hotspot; import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; import jdk.vm.ci.code.InstalledCode; import jdk.vm.ci.code.InvalidInstalledCodeException; import jdk.vm.ci.meta.JavaKind; import jdk.vm.ci.meta.JavaType; import jdk.vm.ci.meta.ResolvedJavaMethod; /** * Implementation of {@link InstalledCode} for code installed as an nmethod. The nmethod stores a * weak reference to an instance of this class. This is necessary to keep the nmethod from being * unloaded while the associated {@link HotSpotNmethod} instance is alive. * <p> * Note that there is no (current) way for the reference from an nmethod to a {@link HotSpotNmethod} * instance to be anything but weak. This is due to the fact that HotSpot does not treat nmethods as * strong GC roots. */ public class HotSpotNmethod extends HotSpotInstalledCode { /** * This (indirect) Method* reference is safe since class redefinition preserves all methods * associated with nmethods in the code cache. */ private final HotSpotResolvedJavaMethod method; private final boolean isDefault; public HotSpotNmethod(HotSpotResolvedJavaMethod method, String name, boolean isDefault) { super(name); this.method = method; this.isDefault = isDefault; } public boolean isDefault() { return isDefault; } public ResolvedJavaMethod getMethod() { return method; } @Override public void invalidate() { compilerToVM().invalidateInstalledCode(this); } @Override public String toString() { return String.format("InstalledNmethod[method=%s, codeBlob=0x%x, isDefault=%b, name=%s]", method, getAddress(), isDefault, name); } protected boolean checkThreeObjectArgs() { assert method.getSignature().getParameterCount(!method.isStatic()) == 3; assert method.getSignature().getParameterKind(0) == JavaKind.Object; assert method.getSignature().getParameterKind(1) == JavaKind.Object; assert !method.isStatic() || method.getSignature().getParameterKind(2) == JavaKind.Object; return true; } private boolean checkArgs(Object... args) { JavaType[] sig = method.toParameterTypes(); assert args.length == sig.length : method.format("%H.%n(%p): expected ") + sig.length + " args, got " + args.length; for (int i = 0; i < sig.length; i++) { Object arg = args[i]; if (arg == null) { assert sig[i].getJavaKind() == JavaKind.Object : method.format("%H.%n(%p): expected arg ") + i + " to be Object, not " + sig[i]; } else if (sig[i].getJavaKind() != JavaKind.Object) { assert sig[i].getJavaKind().toBoxedJavaClass() == arg.getClass() : method.format("%H.%n(%p): expected arg ") + i + " to be " + sig[i] + ", not " + arg.getClass(); } } return true; } @Override public Object executeVarargs(Object... args) throws InvalidInstalledCodeException { assert checkArgs(args); return compilerToVM().executeInstalledCode(args, this); } @Override public long getStart() { return isValid() ? super.getStart() : 0; } }