Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64SafepointOp.java @ 7154:5d0bb7d52783
changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 12 Dec 2012 21:36:40 +0100 |
parents | d56d600819fe |
children | 5e3d1a68664e |
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/* * Copyright (c) 2011, 2012, 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.hotspot.amd64; import static com.oracle.graal.amd64.AMD64.*; import static com.oracle.graal.phases.GraalOptions.*; import com.oracle.graal.api.code.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.bridge.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.LIRInstruction.Opcode; import com.oracle.graal.lir.amd64.*; import com.oracle.graal.lir.asm.*; /** * Emits a safepoint poll. */ @Opcode("SAFEPOINT") public class AMD64SafepointOp extends AMD64LIRInstruction { @State protected LIRFrameState state; private final HotSpotVMConfig config; public AMD64SafepointOp(LIRFrameState state, HotSpotVMConfig config) { this.state = state; this.config = config; } @Override public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler asm) { Register scratch = tasm.frameMap.registerConfig.getScratchRegister(); int pos = asm.codeBuffer.position(); int offset = SafepointPollOffset % tasm.target.pageSize; if (config.isPollingPageFar) { asm.movq(scratch, config.safepointPollingAddress + offset); tasm.recordMark(Marks.MARK_POLL_FAR); tasm.recordSafepoint(pos, state); asm.movq(scratch, new Address(tasm.target.wordKind, scratch.asValue())); } else { tasm.recordMark(Marks.MARK_POLL_NEAR); tasm.recordSafepoint(pos, state); // The C++ code transforms the polling page offset into an RIP displacement // to the real address at that offset in the polling page. asm.movq(scratch, new Address(tasm.target.wordKind, rip.asValue(), offset)); } } }