/* * 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 * or visit www.oracle.com if you need additional information or have any * questions. */ 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(); }