Mercurial > hg > truffle
view graal/com.oracle.graal.truffle.hotspot.amd64/src/com/oracle/graal/truffle/hotspot/amd64/AMD64HotSpotTruffleBackend.java @ 12502:28f56bf7c06a
added support code for Truffle to inject special tail-call code into the prefix of OptimizedCallTarget.call(PackedFrame, Arguments)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 21 Oct 2013 17:42:42 +0200 |
parents | |
children | 23dc5dfdb9c7 |
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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.truffle.hotspot.amd64; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.graph.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.amd64.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.lir.asm.*; import com.oracle.graal.truffle.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; /** * Subclass of {@link AMD64HotSpotBackend} that injects special code into * {@link OptimizedCallTarget#call(PackedFrame, Arguments)} for making a tail-call to the entry * point of the target callee. */ class AMD64HotSpotTruffleBackend extends AMD64HotSpotBackend { private ResolvedJavaMethod optimizedCallTargetCall; public AMD64HotSpotTruffleBackend(HotSpotGraalRuntime runtime, HotSpotProviders providers) { super(runtime, providers); } private ResolvedJavaMethod getInstrumentedMethod() throws GraalInternalError { if (optimizedCallTargetCall == null) { try { optimizedCallTargetCall = getProviders().getMetaAccess().lookupJavaMethod(OptimizedCallTarget.class.getDeclaredMethod("call", PackedFrame.class, Arguments.class)); } catch (NoSuchMethodException | SecurityException e) { throw new GraalInternalError(e); } } return optimizedCallTargetCall; } @Override protected void emitCodePrefix(ResolvedJavaMethod installedCodeOwner, TargetMethodAssembler tasm, AMD64MacroAssembler asm, RegisterConfig regConfig, HotSpotVMConfig config, Label verifiedStub) { super.emitCodePrefix(installedCodeOwner, tasm, asm, regConfig, config, verifiedStub); if (getInstrumentedMethod().equals(installedCodeOwner)) { // TODO emit tailcall code } } }