Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotSafepointOp.java @ 19006:c6b2677bcbef
Change verification of scheduled graph.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 28 Jan 2015 12:05:41 +0100 |
parents | c4da2e160178 |
children | 8fc336a04d77 |
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/* * Copyright (c) 2011, 2014, 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.asm.NumUtil.*; import static com.oracle.graal.compiler.common.GraalOptions.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.meta.HotSpotCodeCacheProvider.MarkId; import com.oracle.graal.lir.*; import com.oracle.graal.lir.amd64.*; import com.oracle.graal.lir.asm.*; import com.oracle.graal.nodes.spi.*; /** * Emits a safepoint poll. */ @Opcode("SAFEPOINT") public class AMD64HotSpotSafepointOp extends AMD64LIRInstruction { @State protected LIRFrameState state; @Temp({OperandFlag.REG, OperandFlag.ILLEGAL}) private AllocatableValue temp; private final HotSpotVMConfig config; public AMD64HotSpotSafepointOp(LIRFrameState state, HotSpotVMConfig config, NodeLIRBuilderTool tool) { this.state = state; this.config = config; if (isPollingPageFar(config) || ImmutableCode.getValue()) { temp = tool.getLIRGeneratorTool().newVariable(LIRKind.value(tool.getLIRGeneratorTool().target().wordKind)); } else { // Don't waste a register if it's unneeded temp = Value.ILLEGAL; } } @Override public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler asm) { emitCode(crb, asm, config, false, state, temp instanceof RegisterValue ? ((RegisterValue) temp).getRegister() : null); } /** * Tests if the polling page address can be reached from the code cache with 32-bit * displacements. */ private static boolean isPollingPageFar(HotSpotVMConfig config) { final long pollingPageAddress = config.safepointPollingAddress; return config.forceUnreachable || !isInt(pollingPageAddress - config.codeCacheLowBoundary()) || !isInt(pollingPageAddress - config.codeCacheHighBoundary()); } public static void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler asm, HotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register scratch) { assert !atReturn || state == null : "state is unneeded at return"; if (ImmutableCode.getValue()) { Kind hostWordKind = Kind.Long; int alignment = hostWordKind.getBitCount() / Byte.SIZE; JavaConstant pollingPageAddress = JavaConstant.forIntegerKind(hostWordKind, config.safepointPollingAddress); // This move will be patched to load the safepoint page from a data segment // co-located with the immutable code. asm.movq(scratch, (AMD64Address) crb.recordDataReferenceInCode(pollingPageAddress, alignment)); final int pos = asm.position(); MarkId.recordMark(crb, atReturn ? MarkId.POLL_RETURN_FAR : MarkId.POLL_FAR); if (state != null) { crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT); } asm.testl(rax, new AMD64Address(scratch)); } else if (isPollingPageFar(config)) { asm.movq(scratch, config.safepointPollingAddress); MarkId.recordMark(crb, atReturn ? MarkId.POLL_RETURN_FAR : MarkId.POLL_FAR); final int pos = asm.position(); if (state != null) { crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT); } asm.testl(rax, new AMD64Address(scratch)); } else { MarkId.recordMark(crb, atReturn ? MarkId.POLL_RETURN_NEAR : MarkId.POLL_NEAR); final int pos = asm.position(); if (state != null) { crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT); } // The C++ code transforms the polling page offset into an RIP displacement // to the real address at that offset in the polling page. asm.testl(rax, new AMD64Address(rip, 0)); } } }