Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java @ 12610:62fb4919edc9
cleaned up mechanism for saving registers and updating the callee save maps in stubs
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Fri, 25 Oct 2013 23:50:05 +0200 |
parents | 7876c59a7a2f |
children | 78c808233ff1 |
line wrap: on
line source
/* * Copyright (c) 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.api.code.CallingConvention.Type.*; import static com.oracle.graal.api.code.ValueUtil.*; import static com.oracle.graal.phases.GraalOptions.*; import static java.lang.reflect.Modifier.*; import java.util.*; import sun.misc.*; import com.oracle.graal.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.asm.amd64.AMD64Assembler.ConditionFlag; import com.oracle.graal.compiler.gen.*; import com.oracle.graal.compiler.target.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.bridge.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.hotspot.stubs.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.amd64.*; import com.oracle.graal.lir.asm.*; import com.oracle.graal.nodes.*; /** * HotSpot AMD64 specific backend. */ public class AMD64HotSpotBackend extends HotSpotHostBackend { private static final Unsafe unsafe = Unsafe.getUnsafe(); public AMD64HotSpotBackend(HotSpotGraalRuntime runtime, HotSpotProviders providers) { super(runtime, providers); } @Override public boolean shouldAllocateRegisters() { return true; } @Override public FrameMap newFrameMap() { return new AMD64FrameMap(getCodeCache()); } @Override public LIRGenerator newLIRGenerator(StructuredGraph graph, FrameMap frameMap, CallingConvention cc, LIR lir) { return new AMD64HotSpotLIRGenerator(graph, getProviders(), getRuntime().getConfig(), frameMap, cc, lir); } /** * Emits code to do stack overflow checking. * * @param afterFrameInit specifies if the stack pointer has already been adjusted to allocate * the current frame */ protected static void emitStackOverflowCheck(TargetMethodAssembler tasm, boolean afterFrameInit) { if (StackShadowPages.getValue() > 0) { AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm; int frameSize = tasm.frameMap.frameSize(); if (frameSize > 0) { int lastFramePage = frameSize / unsafe.pageSize(); // emit multiple stack bangs for methods with frames larger than a page for (int i = 0; i <= lastFramePage; i++) { int disp = (i + StackShadowPages.getValue()) * unsafe.pageSize(); if (afterFrameInit) { disp -= frameSize; } tasm.blockComment("[stack overflow check]"); asm.movq(new AMD64Address(rsp, -disp), AMD64.rax); } } } } class HotSpotFrameContext implements FrameContext { final boolean isStub; HotSpotFrameContext(boolean isStub) { this.isStub = isStub; } @Override public void enter(TargetMethodAssembler tasm) { FrameMap frameMap = tasm.frameMap; int frameSize = frameMap.frameSize(); AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm; if (!isStub) { emitStackOverflowCheck(tasm, false); } asm.decrementq(rsp, frameSize); if (ZapStackOnMethodEntry.getValue()) { final int intSize = 4; for (int i = 0; i < frameSize / intSize; ++i) { asm.movl(new AMD64Address(rsp, i * intSize), 0xC1C1C1C1); } } CalleeSaveLayout csl = frameMap.registerConfig.getCalleeSaveLayout(); if (csl != null && csl.size != 0) { int frameToCSA = frameMap.offsetToCalleeSaveArea(); assert frameToCSA >= 0; asm.save(csl, frameToCSA); } } @Override public void leave(TargetMethodAssembler tasm) { int frameSize = tasm.frameMap.frameSize(); AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm; CalleeSaveLayout csl = tasm.frameMap.registerConfig.getCalleeSaveLayout(); if (csl != null && csl.size != 0) { tasm.compilationResult.setRegisterRestoreEpilogueOffset(asm.codeBuffer.position()); // saved all registers, restore all registers int frameToCSA = tasm.frameMap.offsetToCalleeSaveArea(); asm.restore(csl, frameToCSA); } asm.incrementq(rsp, frameSize); } } @Override protected AbstractAssembler createAssembler(FrameMap frameMap) { return new AMD64MacroAssembler(getTarget(), frameMap.registerConfig); } @Override public TargetMethodAssembler newAssembler(LIRGenerator lirGen, CompilationResult compilationResult) { // Omit the frame if the method: // - has no spill slots or other slots allocated during register allocation // - has no callee-saved registers // - has no incoming arguments passed on the stack // - has no deoptimization points // - makes no foreign calls (which require an aligned stack) AMD64HotSpotLIRGenerator gen = (AMD64HotSpotLIRGenerator) lirGen; FrameMap frameMap = gen.frameMap; LIR lir = gen.lir; assert gen.deoptimizationRescueSlot == null || frameMap.frameNeedsAllocating() : "method that can deoptimize must have a frame"; boolean omitFrame = CanOmitFrame.getValue() && !frameMap.frameNeedsAllocating() && !lir.hasArgInCallerFrame() && !gen.hasForeignCall(); Stub stub = gen.getStub(); AbstractAssembler masm = createAssembler(frameMap); HotSpotFrameContext frameContext = omitFrame ? null : new HotSpotFrameContext(stub != null); TargetMethodAssembler tasm = new TargetMethodAssembler(getCodeCache(), getForeignCalls(), frameMap, masm, frameContext, compilationResult); tasm.setFrameSize(frameMap.frameSize()); StackSlot deoptimizationRescueSlot = gen.deoptimizationRescueSlot; if (deoptimizationRescueSlot != null && stub == null) { tasm.compilationResult.setCustomStackAreaOffset(frameMap.offsetForStackSlot(deoptimizationRescueSlot)); } if (stub != null) { Set<Register> definedRegisters = gatherDefinedRegisters(lir); updateStub(stub, definedRegisters, gen.calleeSaveInfo, frameMap); } return tasm; } @Override public void emitCode(TargetMethodAssembler tasm, LIRGenerator lirGen, ResolvedJavaMethod installedCodeOwner) { AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm; FrameMap frameMap = tasm.frameMap; RegisterConfig regConfig = frameMap.registerConfig; HotSpotVMConfig config = getRuntime().getConfig(); Label verifiedStub = new Label(); // Emit the prefix emitCodePrefix(installedCodeOwner, tasm, asm, regConfig, config, verifiedStub); // Emit code for the LIR emitCodeBody(installedCodeOwner, tasm, lirGen); // Emit the suffix emitCodeSuffix(installedCodeOwner, tasm, lirGen, asm, frameMap); } /** * @param installedCodeOwner see {@link Backend#emitCode} */ public void emitCodePrefix(ResolvedJavaMethod installedCodeOwner, TargetMethodAssembler tasm, AMD64MacroAssembler asm, RegisterConfig regConfig, HotSpotVMConfig config, Label verifiedStub) { HotSpotProviders providers = getProviders(); if (installedCodeOwner != null && !isStatic(installedCodeOwner.getModifiers())) { tasm.recordMark(Marks.MARK_UNVERIFIED_ENTRY); CallingConvention cc = regConfig.getCallingConvention(JavaCallee, null, new JavaType[]{providers.getMetaAccess().lookupJavaType(Object.class)}, getTarget(), false); Register inlineCacheKlass = rax; // see definition of IC_Klass in // c1_LIRAssembler_x86.cpp Register receiver = asRegister(cc.getArgument(0)); AMD64Address src = new AMD64Address(receiver, config.hubOffset); if (config.useCompressedClassPointers) { Register register = r10; AMD64HotSpotMove.decodeKlassPointer(asm, register, providers.getRegisters().getHeapBaseRegister(), src, config.narrowKlassBase, config.narrowOopBase, config.narrowKlassShift, config.logKlassAlignment); asm.cmpq(inlineCacheKlass, register); } else { asm.cmpq(inlineCacheKlass, src); } AMD64Call.directConditionalJmp(tasm, asm, getForeignCalls().lookupForeignCall(IC_MISS_HANDLER), ConditionFlag.NotEqual); } asm.align(config.codeEntryAlignment); tasm.recordMark(Marks.MARK_OSR_ENTRY); asm.bind(verifiedStub); tasm.recordMark(Marks.MARK_VERIFIED_ENTRY); } /** * @param installedCodeOwner see {@link Backend#emitCode} */ public void emitCodeBody(ResolvedJavaMethod installedCodeOwner, TargetMethodAssembler tasm, LIRGenerator lirGen) { lirGen.lir.emitCode(tasm); } /** * @param installedCodeOwner see {@link Backend#emitCode} */ public void emitCodeSuffix(ResolvedJavaMethod installedCodeOwner, TargetMethodAssembler tasm, LIRGenerator lirGen, AMD64MacroAssembler asm, FrameMap frameMap) { HotSpotProviders providers = getProviders(); HotSpotFrameContext frameContext = (HotSpotFrameContext) tasm.frameContext; if (frameContext != null && !frameContext.isStub) { HotSpotForeignCallsProvider foreignCalls = providers.getForeignCalls(); tasm.recordMark(Marks.MARK_EXCEPTION_HANDLER_ENTRY); AMD64Call.directCall(tasm, asm, foreignCalls.lookupForeignCall(EXCEPTION_HANDLER), null, false, null); tasm.recordMark(Marks.MARK_DEOPT_HANDLER_ENTRY); AMD64Call.directCall(tasm, asm, foreignCalls.lookupForeignCall(DEOPT_HANDLER), null, false, null); } else { // No need to emit the stubs for entries back into the method since // it has no calls that can cause such "return" entries assert !frameMap.accessesCallerFrame() : lirGen.getGraph(); } } }