66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
//===--------- EHFrameRegistrationPlugin.cpp - Register eh-frames ---------===//
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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/EHFrameRegistrationPlugin.h"
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#include "llvm/ExecutionEngine/JITLink/EHFrameSupport.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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#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::unique_ptr<EHFrameRegistrationPlugin>>
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EHFrameRegistrationPlugin::Create(ExecutionSession &ES) {
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// Lookup addresseses of the registration/deregistration functions in the
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// bootstrap map.
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ExecutorAddr RegisterEHFrameSectionAllocAction;
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ExecutorAddr DeregisterEHFrameSectionAllocAction;
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if (auto Err = ES.getExecutorProcessControl().getBootstrapSymbols(
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{{RegisterEHFrameSectionAllocAction,
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rt::RegisterEHFrameSectionAllocActionName},
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{DeregisterEHFrameSectionAllocAction,
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rt::DeregisterEHFrameSectionAllocActionName}}))
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return std::move(Err);
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return std::make_unique<EHFrameRegistrationPlugin>(
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RegisterEHFrameSectionAllocAction, DeregisterEHFrameSectionAllocAction);
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}
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void EHFrameRegistrationPlugin::modifyPassConfig(
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MaterializationResponsibility &MR, LinkGraph &LG,
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PassConfiguration &PassConfig) {
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if (LG.getTargetTriple().isOSBinFormatMachO())
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PassConfig.PrePrunePasses.insert(
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PassConfig.PrePrunePasses.begin(), [](LinkGraph &G) {
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if (auto *CUSec = G.findSectionByName(MachOCompactUnwindSectionName))
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G.removeSection(*CUSec);
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return Error::success();
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});
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PassConfig.PostFixupPasses.push_back([this](LinkGraph &G) -> Error {
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if (auto *EHFrame = getEHFrameSection(G)) {
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using namespace shared;
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auto R = SectionRange(*EHFrame).getRange();
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G.allocActions().push_back(
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{cantFail(
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WrapperFunctionCall::Create<SPSArgList<SPSExecutorAddrRange>>(
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RegisterEHFrame, R)),
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cantFail(
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WrapperFunctionCall::Create<SPSArgList<SPSExecutorAddrRange>>(
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DeregisterEHFrame, R))});
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}
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return Error::success();
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});
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}
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} // namespace llvm::orc
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