001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.truffle.hotspot;
024
025import java.lang.reflect.*;
026
027import jdk.internal.jvmci.code.*;
028import jdk.internal.jvmci.code.CompilationResult.*;
029import jdk.internal.jvmci.common.*;
030import jdk.internal.jvmci.hotspot.*;
031
032import com.oracle.graal.asm.*;
033import com.oracle.graal.compiler.common.spi.*;
034import com.oracle.graal.hotspot.*;
035import com.oracle.graal.hotspot.meta.*;
036import com.oracle.graal.lir.asm.*;
037import com.oracle.graal.lir.framemap.*;
038import com.oracle.graal.truffle.*;
039
040/**
041 * Mechanism for injecting special code into {@link OptimizedCallTarget#call(Object[])} .
042 */
043public abstract class OptimizedCallTargetInstrumentation extends CompilationResultBuilder {
044
045    public OptimizedCallTargetInstrumentation(CodeCacheProvider codeCache, ForeignCallsProvider foreignCalls, FrameMap frameMap, Assembler asm, FrameContext frameContext,
046                    CompilationResult compilationResult) {
047        super(codeCache, foreignCalls, frameMap, asm, frameContext, compilationResult);
048    }
049
050    @Override
051    public Mark recordMark(Object id) {
052        Mark mark = super.recordMark(id);
053        HotSpotCodeCacheProvider hsCodeCache = (HotSpotCodeCacheProvider) codeCache;
054        if ((int) id == hsCodeCache.config.MARKID_VERIFIED_ENTRY) {
055            HotSpotRegistersProvider registers = HotSpotGraalRuntime.runtime().getHostProviders().getRegisters();
056            injectTailCallCode(HotSpotGraalRuntime.runtime().getConfig(), registers);
057        }
058        return mark;
059    }
060
061    protected static int getFieldOffset(String name, Class<?> declaringClass) {
062        try {
063            declaringClass.getDeclaredField(name).setAccessible(true);
064            Field field = declaringClass.getDeclaredField(name);
065            return (int) UnsafeAccess.unsafe.objectFieldOffset(field);
066        } catch (NoSuchFieldException | SecurityException e) {
067            throw JVMCIError.shouldNotReachHere();
068        }
069    }
070
071    /**
072     * Injects code into the verified entry point of that makes a tail-call to the target callee.
073     */
074    protected abstract void injectTailCallCode(HotSpotVMConfig config, HotSpotRegistersProvider registers);
075}