a8edda195c
These are identified by misc-include-cleaner. I've filtered out those that break builds. Also, I'm staying away from llvm-config.h, config.h, and Compiler.h, which likely cause platform- or compiler-specific build failures.
123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
//===----- UnwindInfoRegistrationPlugin.cpp - libunwind registration ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/Orc/UnwindInfoRegistrationPlugin.h"
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#include "llvm/ExecutionEngine/Orc/Shared/MachOObjectFormat.h"
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#include "llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h"
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#include "llvm/IR/Module.h"
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#define DEBUG_TYPE "orc"
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using namespace llvm::jitlink;
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namespace llvm::orc {
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Expected<std::shared_ptr<UnwindInfoRegistrationPlugin>>
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UnwindInfoRegistrationPlugin::Create(ExecutionSession &ES) {
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ExecutorAddr Register, Deregister;
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auto &EPC = ES.getExecutorProcessControl();
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if (auto Err = EPC.getBootstrapSymbols(
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{{Register, rt_alt::UnwindInfoManagerRegisterActionName},
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{Deregister, rt_alt::UnwindInfoManagerDeregisterActionName}}))
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return std::move(Err);
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return std::make_shared<UnwindInfoRegistrationPlugin>(ES, Register,
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Deregister);
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}
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void UnwindInfoRegistrationPlugin::modifyPassConfig(
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MaterializationResponsibility &MR, LinkGraph &G,
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PassConfiguration &PassConfig) {
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PassConfig.PostFixupPasses.push_back(
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[this](LinkGraph &G) { return addUnwindInfoRegistrationActions(G); });
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}
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Error UnwindInfoRegistrationPlugin::addUnwindInfoRegistrationActions(
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LinkGraph &G) {
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ExecutorAddrRange EHFrameRange, UnwindInfoRange;
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std::vector<Block *> CodeBlocks;
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auto ScanUnwindInfoSection = [&](Section &Sec, ExecutorAddrRange &SecRange) {
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if (Sec.empty())
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return;
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SecRange.Start = (*Sec.blocks().begin())->getAddress();
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for (auto *B : Sec.blocks()) {
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auto R = B->getRange();
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SecRange.Start = std::min(SecRange.Start, R.Start);
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SecRange.End = std::max(SecRange.End, R.End);
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for (auto &E : B->edges()) {
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if (E.getKind() != Edge::KeepAlive || !E.getTarget().isDefined())
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continue;
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auto &TargetBlock = E.getTarget().getBlock();
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auto &TargetSection = TargetBlock.getSection();
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if ((TargetSection.getMemProt() & MemProt::Exec) == MemProt::Exec)
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CodeBlocks.push_back(&TargetBlock);
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}
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}
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};
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if (auto *EHFrame = G.findSectionByName(MachOEHFrameSectionName))
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ScanUnwindInfoSection(*EHFrame, EHFrameRange);
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if (auto *UnwindInfo = G.findSectionByName(MachOUnwindInfoSectionName))
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ScanUnwindInfoSection(*UnwindInfo, UnwindInfoRange);
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if (CodeBlocks.empty())
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return Error::success();
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if ((EHFrameRange == ExecutorAddrRange() &&
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UnwindInfoRange == ExecutorAddrRange()))
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return Error::success();
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llvm::sort(CodeBlocks, [](const Block *LHS, const Block *RHS) {
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return LHS->getAddress() < RHS->getAddress();
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});
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SmallVector<ExecutorAddrRange> CodeRanges;
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for (auto *B : CodeBlocks) {
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if (CodeRanges.empty() || CodeRanges.back().End != B->getAddress())
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CodeRanges.push_back(B->getRange());
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else
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CodeRanges.back().End = B->getRange().End;
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}
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ExecutorAddr DSOBase;
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if (auto *DSOBaseSym = G.findAbsoluteSymbolByName(DSOBaseName))
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DSOBase = DSOBaseSym->getAddress();
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else if (auto *DSOBaseSym = G.findExternalSymbolByName(DSOBaseName))
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DSOBase = DSOBaseSym->getAddress();
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else if (auto *DSOBaseSym = G.findDefinedSymbolByName(DSOBaseName))
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DSOBase = DSOBaseSym->getAddress();
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else
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return make_error<StringError>("In " + G.getName() +
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" could not find dso base symbol",
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inconvertibleErrorCode());
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using namespace shared;
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using SPSRegisterArgs =
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SPSArgList<SPSSequence<SPSExecutorAddrRange>, SPSExecutorAddr,
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SPSExecutorAddrRange, SPSExecutorAddrRange>;
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using SPSDeregisterArgs = SPSArgList<SPSSequence<SPSExecutorAddrRange>>;
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G.allocActions().push_back(
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{cantFail(WrapperFunctionCall::Create<SPSRegisterArgs>(
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Register, CodeRanges, DSOBase, EHFrameRange, UnwindInfoRange)),
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cantFail(WrapperFunctionCall::Create<SPSDeregisterArgs>(Deregister,
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CodeRanges))});
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return Error::success();
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}
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} // namespace llvm::orc
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