eae6d6d18b
Re-enables compact-unwind support in JITLink, which was reverted in b04847b427d due to buildbot failures. The underlying cause for the failures on the buildbots was the lack of compact-unwind registration support on older Darwin OSes. Since the CompactUnwindManager pass now removes eh-frames by default we were left with unwind-info that could not be registered. On x86-64, where eh-frame info is produced by default the solution is to fall back to using eh-frames. On arm64 we simply can't support exceptions on older OSes. This patch updates the EHFrameRegistrationPlugin to remove the compact-unwind section (__LD,__compact_unwind) when installed, forcing use of eh-frames when the EHFrameRegistrationPlugin is used. In LLJIT, the EHFrameRegistrationPlugin continues to be used for all non-Darwin platform, and will be added on Darwin platforms when the a CompactUnwindRegistrationPlugin instance can't be created (e.g. due to missing support for compact-unwind info registration). The lit.cfg.py script is updated to check whether the host OSes default unwind info supports JIT registration, allowing tests to be disabled for older Darwin OSes on arm64.
78 lines
3.9 KiB
C++
78 lines
3.9 KiB
C++
//===-------- MachOObjectFormat.cpp -- MachO format details for ORC -------===//
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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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//
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// ORC-specific MachO object format details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/Orc/Shared/MachOObjectFormat.h"
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namespace llvm {
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namespace orc {
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StringRef MachODataCommonSectionName = "__DATA,__common";
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StringRef MachODataDataSectionName = "__DATA,__data";
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StringRef MachOEHFrameSectionName = "__TEXT,__eh_frame";
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StringRef MachOCompactUnwindSectionName = "__LD,__compact_unwind";
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StringRef MachOCStringSectionName = "__TEXT,__cstring";
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StringRef MachOModInitFuncSectionName = "__DATA,__mod_init_func";
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StringRef MachOObjCCatListSectionName = "__DATA,__objc_catlist";
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StringRef MachOObjCCatList2SectionName = "__DATA,__objc_catlist2";
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StringRef MachOObjCClassListSectionName = "__DATA,__objc_classlist";
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StringRef MachOObjCClassNameSectionName = "__TEXT,__objc_classname";
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StringRef MachOObjCClassRefsSectionName = "__DATA,__objc_classrefs";
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StringRef MachOObjCConstSectionName = "__DATA,__objc_const";
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StringRef MachOObjCDataSectionName = "__DATA,__objc_data";
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StringRef MachOObjCImageInfoSectionName = "__DATA,__objc_imageinfo";
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StringRef MachOObjCMethNameSectionName = "__TEXT,__objc_methname";
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StringRef MachOObjCMethTypeSectionName = "__TEXT,__objc_methtype";
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StringRef MachOObjCNLCatListSectionName = "__DATA,__objc_nlcatlist";
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StringRef MachOObjCNLClassListSectionName = "__DATA,__objc_nlclslist";
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StringRef MachOObjCProtoListSectionName = "__DATA,__objc_protolist";
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StringRef MachOObjCProtoRefsSectionName = "__DATA,__objc_protorefs";
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StringRef MachOObjCSelRefsSectionName = "__DATA,__objc_selrefs";
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StringRef MachOSwift5ProtoSectionName = "__TEXT,__swift5_proto";
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StringRef MachOSwift5ProtosSectionName = "__TEXT,__swift5_protos";
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StringRef MachOSwift5TypesSectionName = "__TEXT,__swift5_types";
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StringRef MachOSwift5TypeRefSectionName = "__TEXT,__swift5_typeref";
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StringRef MachOSwift5FieldMetadataSectionName = "__TEXT,__swift5_fieldmd";
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StringRef MachOSwift5EntrySectionName = "__TEXT,__swift5_entry";
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StringRef MachOTextTextSectionName = "__TEXT,__text";
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StringRef MachOThreadBSSSectionName = "__DATA,__thread_bss";
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StringRef MachOThreadDataSectionName = "__DATA,__thread_data";
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StringRef MachOThreadVarsSectionName = "__DATA,__thread_vars";
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StringRef MachOUnwindInfoSectionName = "__TEXT,__unwind_info";
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StringRef MachOInitSectionNames[22] = {
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MachOModInitFuncSectionName, MachOObjCCatListSectionName,
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MachOObjCCatList2SectionName, MachOObjCClassListSectionName,
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MachOObjCClassNameSectionName, MachOObjCClassRefsSectionName,
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MachOObjCConstSectionName, MachOObjCDataSectionName,
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MachOObjCImageInfoSectionName, MachOObjCMethNameSectionName,
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MachOObjCMethTypeSectionName, MachOObjCNLCatListSectionName,
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MachOObjCNLClassListSectionName, MachOObjCProtoListSectionName,
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MachOObjCProtoRefsSectionName, MachOObjCSelRefsSectionName,
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MachOSwift5ProtoSectionName, MachOSwift5ProtosSectionName,
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MachOSwift5TypesSectionName, MachOSwift5TypeRefSectionName,
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MachOSwift5FieldMetadataSectionName, MachOSwift5EntrySectionName,
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};
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bool isMachOInitializerSection(StringRef SegName, StringRef SecName) {
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for (auto &InitSection : MachOInitSectionNames) {
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// Loop below assumes all MachO init sectios have a length-6
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// segment name.
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assert(InitSection[6] == ',' && "Init section seg name has length != 6");
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if (InitSection.starts_with(SegName) && InitSection.substr(7) == SecName)
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return true;
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}
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return false;
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}
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} // namespace orc
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} // namespace llvm
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