/*
* Copyright (c) 2013, 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
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package org.graalvm.compiler.truffle.hotspot;
import static org.graalvm.compiler.truffle.hotspot.UnsafeAccess.UNSAFE;
import java.lang.reflect.Field;
import org.graalvm.compiler.asm.Assembler;
import org.graalvm.compiler.code.CompilationResult;
import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
import org.graalvm.compiler.core.common.util.Util;
import org.graalvm.compiler.debug.GraalError;
import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
import org.graalvm.compiler.lir.asm.DataBuilder;
import org.graalvm.compiler.lir.asm.FrameContext;
import org.graalvm.compiler.lir.framemap.FrameMap;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.compiler.truffle.OptimizedCallTarget;
import jdk.vm.ci.code.CodeCacheProvider;
import jdk.vm.ci.code.site.Mark;
/**
* Mechanism for injecting special code into {@link OptimizedCallTarget#call(Object[])} .
*/
public abstract class OptimizedCallTargetInstrumentation extends CompilationResultBuilder {
protected final GraalHotSpotVMConfig config;
protected final HotSpotRegistersProvider registers;
public OptimizedCallTargetInstrumentation(CodeCacheProvider codeCache, ForeignCallsProvider foreignCalls, FrameMap frameMap, Assembler asm, DataBuilder dataBuilder, FrameContext frameContext,
OptionValues options, CompilationResult compilationResult, GraalHotSpotVMConfig config, HotSpotRegistersProvider registers) {
super(codeCache, foreignCalls, frameMap, asm, dataBuilder, frameContext, options, compilationResult);
this.config = config;
this.registers = registers;
}
@Override
public Mark recordMark(Object id) {
Mark mark = super.recordMark(id);
if ((int) id == config.MARKID_VERIFIED_ENTRY) {
injectTailCallCode();
}
return mark;
}
protected static int getFieldOffset(String name, Class<?> declaringClass) {
try {
Field field = declaringClass.getDeclaredField(name);
Util.setAccessible(field, true);
return (int) UNSAFE.objectFieldOffset(field);
} catch (NoSuchFieldException | SecurityException e) {
throw GraalError.shouldNotReachHere();
}
}
/**
* Injects code into the verified entry point of that makes a tail-call to the target callee.
*/
protected abstract void injectTailCallCode();
}