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/*
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* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.hotspot;
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import static jdk.vm.ci.code.CodeUtil.getCallingConvention;
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import static jdk.vm.ci.common.InitTimer.timer;
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import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
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import org.graalvm.compiler.hotspot.meta.HotSpotHostForeignCallsProvider;
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import org.graalvm.compiler.hotspot.meta.HotSpotLoweringProvider;
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import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
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import org.graalvm.compiler.hotspot.stubs.Stub;
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import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
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import org.graalvm.compiler.lir.framemap.ReferenceMapBuilder;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.options.OptionValues;
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import jdk.vm.ci.code.CallingConvention;
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import jdk.vm.ci.common.InitTimer;
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import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
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import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime;
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import jdk.vm.ci.meta.JavaType;
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import jdk.vm.ci.runtime.JVMCICompiler;
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/**
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* Common functionality of HotSpot host backends.
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*/
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public abstract class HotSpotHostBackend extends HotSpotBackend {
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/**
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* Descriptor for {@code SharedRuntime::deopt_blob()->unpack()}.
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*/
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public static final ForeignCallDescriptor DEOPTIMIZATION_HANDLER = new ForeignCallDescriptor("deoptHandler", void.class);
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/**
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* Descriptor for {@code SharedRuntime::deopt_blob()->uncommon_trap()}.
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*/
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public static final ForeignCallDescriptor UNCOMMON_TRAP_HANDLER = new ForeignCallDescriptor("uncommonTrapHandler", void.class);
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protected final GraalHotSpotVMConfig config;
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public HotSpotHostBackend(GraalHotSpotVMConfig config, HotSpotGraalRuntimeProvider runtime, HotSpotProviders providers) {
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super(runtime, providers);
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this.config = config;
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}
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@Override
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@SuppressWarnings("try")
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public void completeInitialization(HotSpotJVMCIRuntime jvmciRuntime, OptionValues options) {
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final HotSpotProviders providers = getProviders();
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HotSpotHostForeignCallsProvider foreignCalls = (HotSpotHostForeignCallsProvider) providers.getForeignCalls();
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final HotSpotLoweringProvider lowerer = (HotSpotLoweringProvider) providers.getLowerer();
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try (InitTimer st = timer("foreignCalls.initialize")) {
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foreignCalls.initialize(providers, options);
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}
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try (InitTimer st = timer("lowerer.initialize")) {
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lowerer.initialize(options, providers, config);
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}
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}
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protected CallingConvention makeCallingConvention(StructuredGraph graph, Stub stub) {
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if (stub != null) {
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return stub.getLinkage().getIncomingCallingConvention();
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}
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CallingConvention cc = getCallingConvention(getCodeCache(), HotSpotCallingConventionType.JavaCallee, graph.method(), this);
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if (graph.getEntryBCI() != JVMCICompiler.INVOCATION_ENTRY_BCI) {
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// for OSR, only a pointer is passed to the method.
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JavaType[] parameterTypes = new JavaType[]{getMetaAccess().lookupJavaType(long.class)};
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CallingConvention tmp = getCodeCache().getRegisterConfig().getCallingConvention(HotSpotCallingConventionType.JavaCallee, getMetaAccess().lookupJavaType(void.class), parameterTypes, this);
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cc = new CallingConvention(cc.getStackSize(), cc.getReturn(), tmp.getArgument(0));
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}
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return cc;
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}
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public void emitStackOverflowCheck(CompilationResultBuilder crb) {
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if (config.useStackBanging) {
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// Each code entry causes one stack bang n pages down the stack where n
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// is configurable by StackShadowPages. The setting depends on the maximum
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// depth of VM call stack or native before going back into java code,
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// since only java code can raise a stack overflow exception using the
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// stack banging mechanism. The VM and native code does not detect stack
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// overflow.
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// The code in JavaCalls::call() checks that there is at least n pages
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// available, so all entry code needs to do is bang once for the end of
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// this shadow zone.
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// The entry code may need to bang additional pages if the framesize
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// is greater than a page.
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int pageSize = config.vmPageSize;
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int bangEnd = config.stackShadowPages * pageSize;
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// This is how far the previous frame's stack banging extended.
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int bangEndSafe = bangEnd;
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int frameSize = Math.max(crb.frameMap.frameSize(), crb.compilationResult.getMaxInterpreterFrameSize());
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if (frameSize > pageSize) {
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bangEnd += frameSize;
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}
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int bangOffset = bangEndSafe;
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if (bangOffset <= bangEnd) {
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crb.blockComment("[stack overflow check]");
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}
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while (bangOffset <= bangEnd) {
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// Need at least one stack bang at end of shadow zone.
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bangStackWithOffset(crb, bangOffset);
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bangOffset += pageSize;
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}
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}
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}
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protected abstract void bangStackWithOffset(CompilationResultBuilder crb, int bangOffset);
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@Override
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public ReferenceMapBuilder newReferenceMapBuilder(int totalFrameSize) {
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return new HotSpotReferenceMapBuilder(totalFrameSize, config.maxOopMapStackOffset);
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}
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}
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