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Emit swift5 reflection section data in dsym bundle generated by dsymutil in the Dwarf section.

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Add support for Swift reflection metadata to dsymutil.

This patch adds support for copying Swift reflection metadata (__swift5_.* sections) from .o files to into the symbol-rich binary in the output .dSYM. The functionality is automatically enabled only if a .o file has reflection metadata sections and the binary doesn't. When copying dsymutil moves the section from the __TEXT segment to the __DWARF segment.

rdar://76973336

Differential Revision: https://reviews.llvm.org/D115007
This commit is contained in:
Shubham Sandeep Rastogi
2021-11-17 15:05:58 -08:00
parent c0861fcbb9
commit 4ce1f3d47c
16 changed files with 1838 additions and 11 deletions
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26
llvm/include/llvm/BinaryFormat/Swift.def Normal file
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@@ -0,0 +1,26 @@
//===- llvm/BinaryFormat/Swift.def - Swift definitions ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Macros for running through Swift enumerators.
//
//===----------------------------------------------------------------------===//
#if !(defined HANDLE_SWIFT_SECTION)
#error "Missing macro definition of HANDLE_SWIFT_SECTION"
#endif
#ifndef HANDLE_SWIFT_SECTION
#define HANDLE_SWIFT_SECTION(KIND, MACHO, ELF, COFF)
#endif
HANDLE_SWIFT_SECTION(fieldmd, "__swift5_fieldmd", "swift5_fieldmd", ".sw5flmd")
HANDLE_SWIFT_SECTION(assocty, "__swift5_assocty", "swift5_assocty", ".sw5asty")
HANDLE_SWIFT_SECTION(builtin, "__swift5_builtin", "swift5_builtin", ".sw5bltn")
HANDLE_SWIFT_SECTION(capture, "__swift5_capture", "swift5_capture", ".sw5cptr")
HANDLE_SWIFT_SECTION(typeref, "__swift5_typeref", "swift5_typeref", ".sw5tyrf")
HANDLE_SWIFT_SECTION(reflstr, "__swift5_reflstr", "swift5_reflstr", ".sw5rfst")

24
llvm/include/llvm/BinaryFormat/Swift.h Normal file
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@@ -0,0 +1,24 @@
//===-- llvm/BinaryFormat/Swift.h ---Swift Constants-------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
#ifndef LLVM_BINARYFORMAT_SWIFT_H
#define LLVM_BINARYFORMAT_SWIFT_H
namespace llvm {
namespace swift {
enum Swift5ReflectionSectionKind {
#define HANDLE_SWIFT_SECTION(KIND, MACHO, ELF, COFF) KIND,
#include "llvm/BinaryFormat/Swift.def"
#undef HANDLE_SWIFT_SECTION
unknown,
last = unknown
};
} // end of namespace swift
} // end of namespace llvm
#endif

8
llvm/include/llvm/DWARFLinker/DWARFStreamer.h
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@@ -9,6 +9,7 @@
#ifndef LLVM_DWARFLINKER_DWARFSTREAMER_H
#define LLVM_DWARFLINKER_DWARFSTREAMER_H
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/CodeGen/AccelTable.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/DWARFLinker/DWARFLinker.h"
@@ -48,7 +49,7 @@ public:
: OutFile(OutFile), OutFileType(OutFileType), Translator(Translator),
ErrorHandler(Error), WarningHandler(Warning) {}
bool init(Triple TheTriple);
bool init(Triple TheTriple, StringRef Swift5ReflectionSegmentName);
/// Dump the file to the disk.
void finish();
@@ -85,6 +86,11 @@ public:
/// Emit the swift_ast section stored in \p Buffer.
void emitSwiftAST(StringRef Buffer);
/// Emit the swift reflection section stored in \p Buffer.
void emitSwiftReflectionSection(
llvm::swift::Swift5ReflectionSectionKind ReflSectionKind,
StringRef Buffer, uint32_t Alignment, uint32_t Size);
/// Emit debug_ranges for \p FuncRange by translating the
/// original \p Entries.
void emitRangesEntries(

10
llvm/include/llvm/MC/MCContext.h
View File

@@ -80,6 +80,10 @@ namespace llvm {
private:
Environment Env;
/// The name of the Segment where Swift5 Reflection Section data will be
/// outputted
StringRef Swift5ReflectionSegmentName;
/// The triple for this object.
Triple TT;
@@ -399,13 +403,17 @@ namespace llvm {
const MCRegisterInfo *MRI, const MCSubtargetInfo *MSTI,
const SourceMgr *Mgr = nullptr,
MCTargetOptions const *TargetOpts = nullptr,
bool DoAutoReset = true);
bool DoAutoReset = true,
StringRef Swift5ReflSegmentName = {});
MCContext(const MCContext &) = delete;
MCContext &operator=(const MCContext &) = delete;
~MCContext();
Environment getObjectFileType() const { return Env; }
const StringRef &getSwift5ReflectionSegmentName() const {
return Swift5ReflectionSegmentName;
}
const Triple &getTargetTriple() const { return TT; }
const SourceMgr *getSourceManager() const { return SrcMgr; }

13
llvm/include/llvm/MC/MCObjectFileInfo.h
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@@ -15,6 +15,7 @@
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/Triple.h"
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/VersionTuple.h"
@@ -228,6 +229,10 @@ protected:
MCSection *ReadOnly8Section = nullptr;
MCSection *ReadOnly16Section = nullptr;
// Swift5 Reflection Data Sections
std::array<MCSection *, swift::Swift5ReflectionSectionKind::last>
Swift5ReflectionSections = {};
public:
void initMCObjectFileInfo(MCContext &MCCtx, bool PIC,
bool LargeCodeModel = false);
@@ -423,6 +428,14 @@ public:
bool isPositionIndependent() const { return PositionIndependent; }
// Swift5 Reflection Data Sections
MCSection *getSwift5ReflectionSection(
llvm::swift::Swift5ReflectionSectionKind ReflSectionKind) {
return ReflSectionKind != llvm::swift::Swift5ReflectionSectionKind::unknown
? Swift5ReflectionSections[ReflSectionKind]
: nullptr;
}
private:
bool PositionIndependent = false;
MCContext *Ctx = nullptr;

4
llvm/include/llvm/Object/MachO.h
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@@ -22,6 +22,7 @@
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Object/Binary.h"
#include "llvm/Object/ObjectFile.h"
@@ -583,6 +584,9 @@ public:
StringRef mapDebugSectionName(StringRef Name) const override;
llvm::swift::Swift5ReflectionSectionKind
mapReflectionSectionNameToEnumValue(StringRef SectionName) const override;
bool hasPageZeroSegment() const { return HasPageZeroSegment; }
static bool classof(const Binary *v) {

6
llvm/include/llvm/Object/ObjectFile.h
View File

@@ -18,6 +18,7 @@
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/Object/Binary.h"
#include "llvm/Object/Error.h"
#include "llvm/Object/SymbolicFile.h"
@@ -290,6 +291,11 @@ protected:
virtual void getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const = 0;
virtual llvm::swift::Swift5ReflectionSectionKind
mapReflectionSectionNameToEnumValue(StringRef SectionName) const {
return llvm::swift::Swift5ReflectionSectionKind::unknown;
};
Expected<uint64_t> getSymbolValue(DataRefImpl Symb) const;
public:

20
llvm/lib/DWARFLinker/DWARFStreamer.cpp
View File

@@ -27,7 +27,8 @@
namespace llvm {
bool DwarfStreamer::init(Triple TheTriple) {
bool DwarfStreamer::init(Triple TheTriple,
StringRef Swift5ReflectionSegmentName) {
std::string ErrorStr;
std::string TripleName;
StringRef Context = "dwarf streamer init";
@@ -54,8 +55,9 @@ bool DwarfStreamer::init(Triple TheTriple) {
if (!MSTI)
return error("no subtarget info for target " + TripleName, Context), false;
MC.reset(new MCContext(TheTriple, MAI.get(), MRI.get(), MSTI.get()));
MOFI.reset(TheTarget->createMCObjectFileInfo(*MC, /*PIC=*/false));
MC.reset(new MCContext(TheTriple, MAI.get(), MRI.get(), MSTI.get(), nullptr,
nullptr, true, Swift5ReflectionSegmentName));
MOFI.reset(TheTarget->createMCObjectFileInfo(*MC, /*PIC=*/false, false));
MC->setObjectFileInfo(MOFI.get());
MAB = TheTarget->createMCAsmBackend(*MSTI, *MRI, MCOptions);
@@ -302,6 +304,18 @@ void DwarfStreamer::emitSwiftAST(StringRef Buffer) {
MS->emitBytes(Buffer);
}
void DwarfStreamer::emitSwiftReflectionSection(
llvm::swift::Swift5ReflectionSectionKind ReflSectionKind, StringRef Buffer,
uint32_t Alignment, uint32_t Size) {
MCSection *ReflectionSection =
MOFI->getSwift5ReflectionSection(ReflSectionKind);
if (ReflectionSection == nullptr)
return;
ReflectionSection->setAlignment(Align(Alignment));
MS->SwitchSection(ReflectionSection);
MS->emitBytes(Buffer);
}
/// Emit the debug_range section contents for \p FuncRange by
/// translating the original \p Entries. The debug_range section
/// format is totally trivial, consisting just of pairs of address

8
llvm/lib/MC/MCContext.cpp
View File

@@ -67,10 +67,10 @@ static void defaultDiagHandler(const SMDiagnostic &SMD, bool, const SourceMgr &,
MCContext::MCContext(const Triple &TheTriple, const MCAsmInfo *mai,
const MCRegisterInfo *mri, const MCSubtargetInfo *msti,
const SourceMgr *mgr, MCTargetOptions const *TargetOpts,
bool DoAutoReset)
: TT(TheTriple), SrcMgr(mgr), InlineSrcMgr(nullptr),
DiagHandler(defaultDiagHandler), MAI(mai), MRI(mri), MSTI(msti),
Symbols(Allocator), UsedNames(Allocator),
bool DoAutoReset, StringRef Swift5ReflSegmentName)
: Swift5ReflectionSegmentName(Swift5ReflSegmentName), TT(TheTriple),
SrcMgr(mgr), InlineSrcMgr(nullptr), DiagHandler(defaultDiagHandler),
MAI(mai), MRI(mri), MSTI(msti), Symbols(Allocator), UsedNames(Allocator),
InlineAsmUsedLabelNames(Allocator),
CurrentDwarfLoc(0, 0, 0, DWARF2_FLAG_IS_STMT, 0, 0),
AutoReset(DoAutoReset), TargetOptions(TargetOpts) {

11
llvm/lib/MC/MCObjectFileInfo.cpp
View File

@@ -299,6 +299,17 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
RemarksSection = Ctx->getMachOSection(
"__LLVM", "__remarks", MachO::S_ATTR_DEBUG, SectionKind::getMetadata());
// The architecture of dsymutil makes it very difficult to copy the Swift
// reflection metadata sections into the __TEXT segment, so dsymutil creates
// these sections in the __DWARF segment instead.
if (!Ctx->getSwift5ReflectionSegmentName().empty()) {
#define HANDLE_SWIFT_SECTION(KIND, MACHO, ELF, COFF) \
Swift5ReflectionSections[llvm::swift::Swift5ReflectionSectionKind::KIND] = \
Ctx->getMachOSection(Ctx->getSwift5ReflectionSegmentName().data(), \
MACHO, 0, SectionKind::getMetadata());
#include "llvm/BinaryFormat/Swift.def"
}
TLSExtraDataSection = TLSTLVSection;
}

12
llvm/lib/Object/MachOObjectFile.cpp
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@@ -20,6 +20,7 @@
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/Object/Error.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
@@ -4765,3 +4766,14 @@ MachOObjectFile::findDsymObjectMembers(StringRef Path) {
Path.str().c_str());
return ObjectPaths;
}
llvm::swift::Swift5ReflectionSectionKind
MachOObjectFile::mapReflectionSectionNameToEnumValue(
StringRef SectionName) const {
#define HANDLE_SWIFT_SECTION(KIND, MACHO, ELF, COFF) \
.Case(MACHO, llvm::swift::Swift5ReflectionSectionKind::KIND)
return StringSwitch<llvm::swift::Swift5ReflectionSectionKind>(SectionName)
#include "llvm/BinaryFormat/Swift.def"
.Default(llvm::swift::Swift5ReflectionSectionKind::unknown);
#undef HANDLE_SWIFT_SECTION
}

886
llvm/test/tools/dsymutil/Inputs/main.yaml Normal file
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@@ -0,0 +1,886 @@
# How to generate this file:
# 1. First take a swift file and run xcrun swiftc -g -v test.swift
# reflection_metadata.swift, make sure the two swift files are in a short path
# like /tmp/
# 2. Now you can see what the driver does, generate the object files in the
# tmp directory and link them to create the input binary
# 3. Run obj2yaml on the input binary to create a yaml file and strip out the
# swift5 reflection sections from the load commands in the text segment
# 4. I ran delta to reduce this file.
--- !mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x1000007
cpusubtype: 0x3
filetype: 0x2
ncmds: 18
sizeofcmds: 2848
flags: 0x200085
reserved: 0x0
LoadCommands:
- cmd: LC_SEGMENT_64
cmdsize: 72
segname: __PAGEZERO
vmaddr: 0
vmsize: 4294967296
fileoff: 0
filesize: 0
maxprot: 0
initprot: 0
nsects: 0
flags: 0
- cmd: LC_SEGMENT_64
cmdsize: 952
segname: __TEXT
vmaddr: 4294967296
vmsize: 16384
fileoff: 0
filesize: 16384
maxprot: 5
initprot: 5
nsects: 11
flags: 0
Sections:
- sectname: __text
segname: __TEXT
addr: 0x100003EB0
size: 336
offset: 0x3EB0
align: 3
reloff: 0x0
nreloc: 0
flags: 0x0
reserved1: 0x0
reserved2: 0x0
- cmd: LC_SEGMENT_64
cmdsize: 392
segname: __DATA_CONST
vmaddr: 4294983680
vmsize: 16384
fileoff: 16384
filesize: 16384
maxprot: 3
initprot: 3
nsects: 4
flags: 16
Sections:
- sectname: __got
segname: __DATA_CONST
addr: 0x100004000
size: 48
offset: 0x4000
align: 3
reloff: 0x0
nreloc: 0
flags: 0x6
reserved1: 0x11
reserved2: 0x0
- cmd: LC_SEGMENT_64
cmdsize: 392
segname: __DATA
vmaddr: 4295000064
vmsize: 16384
fileoff: 32768
filesize: 16384
maxprot: 3
initprot: 3
nsects: 4
flags: 0
Sections:
- sectname: __la_symbol_ptr
segname: __DATA
addr: 0x100008000
size: 384
offset: 0x8088
align: 3
reloff: 0x0
nreloc: 0
flags: 0x0
reserved1: 0x0
reserved2: 0x0
- cmd: LC_SEGMENT_64
cmdsize: 72
segname: __LINKEDIT
vmaddr: 4295016448
vmsize: 32768
fileoff: 49152
filesize: 23584
maxprot: 1
initprot: 1
nsects: 0
flags: 0
- cmd: LC_DYLD_INFO_ONLY
cmdsize: 48
rebase_off: 49152
rebase_size: 64
bind_off: 49216
bind_size: 216
weak_bind_off: 0
weak_bind_size: 0
lazy_bind_off: 49432
lazy_bind_size: 600
export_off: 50032
export_size: 1000
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 51136
nsyms: 638
stroff: 61504
strsize: 11232
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 560
iextdefsym: 560
nextdefsym: 52
iundefsym: 612
nundefsym: 26
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 61344
nindirectsyms: 40
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
- cmd: LC_LOAD_DYLINKER
cmdsize: 32
name: 12
- cmd: LC_UUID
cmdsize: 24
uuid: AA0A51FA-8B29-3A7B-85AA-FA6A457B2211
- cmd: LC_BUILD_VERSION
cmdsize: 32
platform: 1
minos: 786432
sdk: 786688
ntools: 1
- cmd: LC_SOURCE_VERSION
cmdsize: 16
version: 0
- cmd: LC_MAIN
cmdsize: 24
entryoff: 9376
stacksize: 0
- cmd: LC_LOAD_DYLIB
cmdsize: 56
dylib:
name: 24
timestamp: 2
current_version: 14942208
compatibility_version: 65536
- cmd: LC_LOAD_DYLIB
cmdsize: 56
dylib:
name: 24
timestamp: 2
current_version: 85917696
compatibility_version: 65536
- cmd: LC_LOAD_DYLIB
cmdsize: 64
dylib:
name: 24
timestamp: 2
current_version: 85196845
compatibility_version: 65536
- cmd: LC_FUNCTION_STARTS
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dataoff: 51032
datasize: 104
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dataoff: 51136
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- ___swift_assignWithTake_strong
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436
llvm/test/tools/dsymutil/Inputs/reflection_metadata.yaml Normal file
View File

@@ -0,0 +1,436 @@
# How to generate this file:
# 1. First take a swift file and run xcrun swiftc -g -v file.swift
# secondfile.swift, make sure the two swift files are in a short path like /tmp/
# 2. Now you can see what the driver does, generate the object files in the
# tmp directory
# 3. Run obj2yaml on object file to create a yaml file
# 4. I ran delta to reduce this file.
--- !mach-o
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cputype: 0x1000007
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segname: ''
vmaddr: 0
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relocations:
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symbolnum: 142
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extern: true
type: 1
scattered: false
value: 0
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size: 117
offset: 0x1CEC
align: 1
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relocations:
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symbolnum: 163
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content: 00000000FCFFFFFF0100000008000000F0FFFFFFECFFFFFF
relocations:
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content: 00000000090000000800010010000000FE000000
relocations:
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pcrel: false
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extern: true
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addr: 0x3372
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minos: 786432
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ntools: 0
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symoff: 27888
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strsize: 5056
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nextdefsym: 87
iundefsym: 166
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cmdsize: 40
count: 1
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cmdsize: 24
count: 1
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cmdsize: 32
count: 1
PayloadBytes: [ 0x2D, 0x6C, 0x73, 0x77, 0x69, 0x66, 0x74, 0x5F,
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cmdsize: 24
count: 1
PayloadBytes: [ 0x2D, 0x6C, 0x6F, 0x62, 0x6A, 0x63, 0x0, 0x0, 0x0,
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StringTable:
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- '_$s4main6MyEnumOwup'
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- _swift_retain
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- '_$s4main15MyGenericStructVMn'
- '_$s4main11ConformanceVMn'
- '_$s4main6MyEnumOMn'
- '_$s4main13MyGenericEnumOMn'
- '_$s4main7MyClassCMn'
- '_$s4main14MyGenericClassCMn'
- '_$s4main7MyClassCMm'
- '_$s5Inner4main10MyProtocolPTl'
- '_$s4main6MyEnumOwui'
- '_$s4main13MyGenericEnumOwui'
- '_$s4main11ConformanceV5innerSivpfi'
- _symbolic Si
- '_$s4main15MyGenericStructVMi'
- '_$s4main13MyGenericEnumOMi'
- '_$s4main14MyGenericClassCMi'
- l_llvm.swift_module_hash
- '_$s4main13MyGenericEnumOyxGAA0B8ProtocolRzlWOh'
- '_$s4main6MyEnumOWOh'
- '_$s4main14MyGenericClassC1i5InnerQzvg'
- '_$s4main14MyGenericClassC1txvg'
- '_$s4main11ConformanceV5innerSivg'
- '_$s4main7MyClassC1iSivg'
- '_$s4main7MyClassC2msAA0B6StructVvg'
- '_$s4main7MyClassC2meAA0B4EnumOvg'
- '_$s4main14MyGenericClassC3mgsAA0bC6StructVyxGvg'
- '_$s4main14MyGenericClassC3mgeAA0bC4EnumOyxGvg'
- '_$s4main6MyEnumOwug'
- '_$s4main13MyGenericEnumOwug'
- ___swift_initWithCopy_strong
- ___swift_assignWithCopy_strong
- ___swift_destroy_strong
- ___swift_assignWithTake_strong
- _objc_opt_self
- '_$s4main8MyStructVMf'
- '_$s4main11ConformanceVMf'
- '_$s4main6MyEnumOMf'
- '_$s4main7MyClassCMf'
- _swift_checkMetadataState
- _swift_release
- l_type_metadata_table
- __objc_empty_cache
- _swift_deallocClassInstance
- ___chkstk_darwin_llvm_probe
- '_$s4main6MyEnumOWOe'
- '_$s4main7MyClassC1iSivpWvd'
- '_$s4main7MyClassC2msAA0B6StructVvpWvd'
- '_$s4main7MyClassC2meAA0B4EnumOvpWvd'
- '_$s4main14MyGenericClassC3mgsAA0bC6StructVyxGvpWvd'
- '_$s4main7MyClassCfd'
- '_$s4main14MyGenericClassCfd'
- '_$s4main7MyClassC1i2ms2meACSi_AA0B6StructVAA0B4EnumOtcfc'
- '_$s4main14MyGenericClassC1t1i3mgs3mgeACyxGx_5InnerQzAA0bC6StructVyxGAA0bC4EnumOyxGtcfc'
- '_$s4main11ConformanceVAA10MyProtocolAAMc'
- '_$s4main6MyEnumOwta'
- l_metadata
- _swift_allocateGenericClassMetadata
- _swift_allocateGenericValueMetadata
- _swift_getGenericMetadata
- ___swift_instantiateGenericMetadata
- '_$s4main6MyEnumOwca'
- '_$s4main8MyStructVMa'
- '_$s4main15MyGenericStructVMa'
- '_$s4main11ConformanceVMa'
- '_$s4main6MyEnumOMa'
- '_$s4main13MyGenericEnumOMa'
- '_$s4main7MyClassCMa'
- '_$s4main14MyGenericClassCMa'
- '_$s4main16makeSomeClosures1tyycx_tAA10MyProtocolRzlFyycfU_'
- '_$s4main11ConformanceV5innerACSi_tcfcfA_'
- '_$s4main11ConformanceVAA10MyProtocolA2aDP5inner5InnerQzvgTW'
- _symbolic _____ 4main8MyStructV
- _symbolic _____ 4main15MyGenericStructV
- _symbolic _____yxG 4main15MyGenericStructV
- _symbolic _____ 4main11ConformanceV
- '_$sytWV'
- '_$sBoWV'
- '_$sBi64_WV'
- '_$s4main6MyEnumOWV'
- '_$s4main13MyGenericEnumOWV'
- '_$s4main11ConformanceV5innerSivpMV'
- '_symbolic $s4main10MyProtocolP'
- _symbolic 5Inner_____Qz 4main10MyProtocolP
- '_$s4main11ConformanceVAA10MyProtocolAAWP'
- '_$s4main15MyGenericStructVMP'
- '_$s4main13MyGenericEnumOMP'
- '_$s4main14MyGenericClassCMP'
- '_$s4main6MyEnumOwCP'
- _symbolic _____ 4main6MyEnumO
- _symbolic _____ 4main13MyGenericEnumO
- _symbolic _____yxG 4main13MyGenericEnumO
- '_$s4main8MyStructVN'
- '_$s4main11ConformanceVN'
- '_$s4main6MyEnumON'
- '_$s4main7MyClassCN'
- '_$s4main11ConformanceV5innerSivM'
- '_$s4mainMXM'
- '_$s4main10MyProtocolTL'
- '_$s4main15MyGenericStructVMI'
- '_$s4main13MyGenericEnumOMI'
- '_$s4main14MyGenericClassCMI'
- '_$s4main16makeSomeClosures1tyycx_tAA10MyProtocolRzlF'
- '_$s4main10MyProtocol_pMF'
- '_$s4main8MyStructVMF'
- '_$s4main15MyGenericStructVMF'
- '_$s4main11ConformanceVMF'
- '_$s4main6MyEnumOMF'
- '_$s4main13MyGenericEnumOMF'
- '_$s4main7MyClassCMF'
- '_$s4main14MyGenericClassCMF'
- '_$s4main7MyClassCfD'
- '_$s4main14MyGenericClassCfD'
- _symbolic _____ 4main7MyClassC
- _symbolic _____ 4main14MyGenericClassC
- _symbolic _____yxG 4main14MyGenericClassC
- '_$s4main15MyGenericStructVACyxGycfC'
- '_$s4main8MyStructVACycfC'
- '_$s4main11ConformanceVACycfC'
- '_$s4main11ConformanceV5innerACSi_tcfC'
- '_$s4main7MyClassC1i2ms2meACSi_AA0B6StructVAA0B4EnumOtcfC'
- '_$s4main14MyGenericClassC1t1i3mgs3mgeACyxGx_5InnerQzAA0bC6StructVyxGAA0bC4EnumOyxGtcfC'
- '_$s4main6MyEnumOMB'
- '_$s4main16makeSomeClosures1tyycx_tAA10MyProtocolRzlFyycfU_TA'
- '_$s4main11ConformanceVAA10MyProtocolAAMA'
- l___unnamed_29
- l___unnamed_19
- ___swift_memcpy9_8
- ___swift_memcpy8_8
- l___unnamed_28
- l___unnamed_18
- l___unnamed_27
- l___unnamed_17
- l___unnamed_26
- l___unnamed_16
- l___unnamed_25
- l___unnamed_15
- l___unnamed_4
- l___unnamed_24
- l___unnamed_14
- l___unnamed_3
- ___unnamed_23
- l___unnamed_13
- _swift_initClassMetadata2
- l___unnamed_2
- l___unnamed_12
- l___unnamed_1
- l___unnamed_11
- _symbolic B0
- l___unnamed_30
- l___unnamed_10
- '_$s4main11ConformanceV5innerSivM.resume.0'

254
llvm/test/tools/dsymutil/Inputs/test.yaml Normal file
View File

@@ -0,0 +1,254 @@
# How to generate this file:
# 1. First take a swift file and run xcrun swiftc -g -v file.swift
# secondfile.swift, make sure the two swift files are in a short path like /tmp/
# 2. Now you can see what the driver does, generate the object files in the
# tmp directory
# 3. Run obj2yaml on object file to create a yaml file
# 4. I ran delta to reduce this file.
--- !mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x1000007
cpusubtype: 0x3
filetype: 0x1
ncmds: 8
sizeofcmds: 2240
flags: 0x2000
reserved: 0x0
LoadCommands:
- cmd: LC_SEGMENT_64
cmdsize: 1992
segname: ''
vmaddr: 0
vmsize: 6592
fileoff: 2272
filesize: 6592
maxprot: 7
initprot: 7
nsects: 24
flags: 0
Sections:
- sectname: __text
segname: __TEXT
addr: 0x0
size: 593
offset: 0x8E0
align: 4
reloff: 0x22A0
nreloc: 24
flags: 0x80000400
reserved1: 0x0
reserved2: 0x0
relocations:
- address: 0x233
symbolnum: 2
pcrel: true
length: 2
extern: true
type: 4
scattered: false
value: 0
- sectname: __swift5_typeref
segname: __TEXT
addr: 0x2D6
size: 38
offset: 0xBB6
align: 1
reloff: 0x2418
nreloc: 4
flags: 0x10000000
reserved1: 0x0
reserved2: 0x0
content: 5369000001FFFFFFFF002473346D61696E31304D7950726F746F636F6C50000001FFFFFFFF00
relocations:
- address: 0x21
symbolnum: 46
pcrel: false
length: 3
extern: true
type: 0
scattered: false
value: 0
- sectname: __swift5_reflstr
segname: __TEXT
addr: 0x318
size: 12
offset: 0xBF8
align: 0
reloff: 0x0
nreloc: 0
flags: 0x10000000
reserved1: 0x0
reserved2: 0x0
content: 496E6E657200696E6E657200
- sectname: __swift5_assocty
segname: __TEXT
addr: 0x324
size: 24
offset: 0xC04
align: 2
reloff: 0x2450
nreloc: 8
flags: 0x10000000
reserved1: 0x0
reserved2: 0x0
content: 00000000FCFFFFFF0100000008000000F0FFFFFFECFFFFFF
relocations:
- address: 0x14
symbolnum: 5
pcrel: false
length: 2
extern: true
type: 0
scattered: false
value: 0
- sectname: __swift5_fieldmd
segname: __TEXT
addr: 0x378
size: 44
offset: 0xC58
align: 2
reloff: 0x24C0
nreloc: 8
flags: 0x10000000
reserved1: 0x0
reserved2: 0x0
content: 000000000000000000000C000100000002000000ECFFFFFFE8FFFFFF000000000000000000000C0000000000
relocations:
- address: 0x1C
symbolnum: 12
pcrel: false
length: 3
extern: false
type: 0
scattered: false
value: 0
- cmd: LC_BUILD_VERSION
cmdsize: 24
platform: 1
minos: 786432
sdk: 786688
ntools: 0
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 9824
nsyms: 57
stroff: 10736
strsize: 1544
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 16
iextdefsym: 16
nextdefsym: 31
iundefsym: 47
nundefsym: 10
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 0
nindirectsyms: 0
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
- cmd: LC_LINKER_OPTION
cmdsize: 40
count: 1
PayloadBytes: [ 0x2D, 0x6C, 0x73, 0x77, 0x69, 0x66, 0x74, 0x53,
0x0, 0x0, 0x0, 0x0 ]
- cmd: LC_LINKER_OPTION
cmdsize: 24
count: 1
PayloadBytes: [ 0x2D, 0x6C, 0x73, 0x77, 0x69, 0x66, 0x74, 0x43,
0x6F, 0x72, 0x65, 0x0 ]
- cmd: LC_LINKER_OPTION
cmdsize: 32
count: 1
PayloadBytes: [ 0x2D, 0x6C, 0x73, 0x77, 0x69, 0x66, 0x74, 0x5F,
0x6E, 0x63, 0x79, 0x0 ]
- cmd: LC_LINKER_OPTION
cmdsize: 24
count: 1
PayloadBytes: [ 0x2D, 0x6C, 0x6F, 0x62, 0x6A, 0x63, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0 ]
LinkEditData:
NameList:
- n_strx: 1494
n_type: 0xE
n_sect: 9
n_desc: 0
n_value: 0
StringTable:
- ''
- l_entry_point
- '_$s4main12Conformance2V5innerSivs'
- l_protocol_conformances
- l_coro.devirt.trigger
- '_$s4main10MyProtocolMp'
- ___swift_reflection_version
- _main
- '_$s4main3AppVMn'
- '_$s4main12Conformance2VMn'
- '_$s4main12Conformance2V5innerSivpfi'
- _symbolic Si
- l_llvm.swift_module_hash
- '_$s4main12Conformance2V5innerSivg'
- '_$s4main3AppVMf'
- '_$s4main12Conformance2VMf'
- _swift_bridgeObjectRelease
- l_type_metadata_table
- '_$s4main12Conformance2VAA10MyProtocolAAMc'
- '_$sSaMa'
- '_$s4main3AppVMa'
- '_$s4main12Conformance2VMa'
- '_$s4main12Conformance2V5innerACSi_tcfcfA_'
- '_$ss5print_9separator10terminatoryypd_S2StFfA1_'
- '_$ss5print_9separator10terminatoryypd_S2StFfA0_'
- '_$s4main3AppV5$mainyyFZ'
- '_$s4main3AppVAAyyFZ'
- '_$s4main12Conformance2VAA10MyProtocolA2aDP5inner5InnerQzvgTW'
- _symbolic _____ 4main3AppV
- '_$sytWV'
- '_$sBi64_WV'
- '_$s4main12Conformance2V5innerSivpMV'
- _symbolic _____ 4main12Conformance2V
- '_symbolic $s4main10MyProtocolP'
- '_$s4main12Conformance2VAA10MyProtocolAAWP'
- '_$sypN'
- '_$s4main3AppVN'
- '_$s4main12Conformance2VN'
- '_$sSSN'
- '_$s4main12Conformance2V5innerSivM'
- '_$s4mainMXM'
- '_$sSa12_endMutationyyF'
- '_$ss5print_9separator10terminatoryypd_S2StF'
- '_$ss27_allocateUninitializedArrayySayxG_BptBwlF'
- '_$ss27_finalizeUninitializedArrayySayxGABnlF'
- '_$s4main3AppVMF'
- '_$s4main12Conformance2VMF'
- '_$s4main3AppVACycfC'
- '_$s4main12Conformance2VACycfC'
- '_$s4main12Conformance2V5innerACSi_tcfC'
- '_$sSS21_builtinStringLiteral17utf8CodeUnitCount7isASCIISSBp_BwBi1_tcfC'
- '_$s4main12Conformance2VAA10MyProtocolAAMA'
- l___unnamed_8
- l___unnamed_7
- l___unnamed_6
- l___unnamed_5
- l___unnamed_4
- '_$s4main12Conformance2V5innerSivM.resume.0'
- ''
- ''
- ''
- ''
- ''
- ''
- ''

44
llvm/test/tools/dsymutil/X86/reflection-dump.test Normal file
View File

@@ -0,0 +1,44 @@
RUN: rm -rf %t.dir && mkdir -p %t.dir/tmp
RUN: cp %p/../Inputs/main.yaml %t.dir
RUN: cp %p/../Inputs/test.yaml %t.dir
RUN: cp %p/../Inputs/reflection_metadata.yaml %t.dir
RUN: yaml2obj %p/../Inputs/main.yaml -o %t.dir/main
RUN: yaml2obj %p/../Inputs/test.yaml -o %t.dir/tmp/test-1.o
RUN: yaml2obj %p/../Inputs/reflection_metadata.yaml -o %t.dir/tmp/reflection_metadata-1.o
RUN: dsymutil -oso-prepend-path=%t.dir %t.dir/main -o %t.dir/main.dSYM
RUN: llvm-objdump -s %t.dir/main.dSYM/Contents/Resources/DWARF/main | FileCheck %s
REQUIRES: host-byteorder-little-endian
CHECK: Contents of section __DWARF,__swift5_typeref:
CHECK-NEXT: 10000e000 53690000 01ffffff ff002473 346d6169 Si........$s4mai
CHECK-NEXT: 10000e010 6e31304d 7950726f 746f636f 6c500000 n10MyProtocolP..
CHECK-NEXT: 10000e020 01ffffff ff007800 42300000 53690000 ......x.B0..Si..
CHECK-NEXT: 10000e030 01ffffff ff002473 346d6169 6e31304d ......$s4main10M
CHECK-NEXT: 10000e040 7950726f 746f636f 6c500000 01ffffff yProtocolP......
CHECK: Contents of section __DWARF,__swift5_reflstr:
CHECK-NEXT: 10000e09b 496e6e65 7200696e 6e657200 496e6e65 Inner.inner.Inne
CHECK-NEXT: 10000e0ab 72006900 6d73006d 6500696e 6e657200 r.i.ms.me.inner.
CHECK-NEXT: 10000e0bb 43004900 74006d67 73006d67 65004743 C.I.t.mgs.mge.GC
CHECK-NEXT: 10000e0cb 00
CHECK: Contents of section __DWARF,__swift5_assocty:
CHECK-NEXT: 10000e0cc 00000000 fcffffff 01000000 08000000 ................
CHECK-NEXT: 10000e0dc f0ffffff ecffffff 00000000 fcffffff ................
CHECK-NEXT: 10000e0ec 01000000 08000000 f0ffffff ecffffff ................
CHECK: Contents of section __DWARF,__swift5_fieldmd:
CHECK-NEXT: 10000e0fc 00000000 00000000 00000c00 01000000 ................
CHECK-NEXT: 10000e10c 02000000 ecffffff e8ffffff 00000000 ................
CHECK-NEXT: 10000e11c 00000000 00000c00 00000000 00000000 ................
CHECK-NEXT: 10000e12c 00000000 04000c00 00000000 00000000 ................
CHECK: Contents of section __DWARF,__swift5_capture:
CHECK-NEXT: 10000e22c 01000000 01000000 02000000 f4ffffff ................
CHECK-NEXT: 10000e23c f0ffffff ecffffff ........
CHECK: Contents of section __DWARF,__swift5_builtin:
CHECK-NEXT: 10000e244 00000000 09000000 08000100 10000000 ................
CHECK-NEXT: 10000e254 fe000000 ....

87
llvm/tools/dsymutil/DwarfLinkerForBinary.cpp
View File

@@ -30,6 +30,7 @@
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/BinaryFormat/Swift.h"
#include "llvm/CodeGen/AccelTable.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/DIE.h"
@@ -174,7 +175,7 @@ bool DwarfLinkerForBinary::createStreamer(const Triple &TheTriple,
[&](const Twine &Warning, StringRef Context, const DWARFDie *) {
warn(Warning, Context);
});
return Streamer->init(TheTriple);
return Streamer->init(TheTriple, "__DWARF");
}
ErrorOr<const object::ObjectFile &>
@@ -295,6 +296,77 @@ DwarfLinkerForBinary::loadObject(const DebugMapObject &Obj,
return ErrorOrObj.getError();
}
static bool binaryHasSwiftReflectionSections(const DebugMap &Map,
const LinkOptions &Options,
BinaryHolder &BinHolder) {
// If the input binary has swift5 reflection sections, there is no need to
// copy them to the .dSYM. Only copy them for binaries where the linker
// omitted the reflection metadata.
if (!Map.getBinaryPath().empty() &&
Options.FileType == OutputFileType::Object) {
auto ObjectEntry = BinHolder.getObjectEntry(Map.getBinaryPath());
// If ObjectEntry or Object has an error, no binary exists, therefore no
// reflection sections exist.
if (!ObjectEntry) {
// Any errors will be diagnosed later in the main loop, ignore them here.
llvm::consumeError(ObjectEntry.takeError());
return false;
}
auto Object =
ObjectEntry->getObjectAs<object::MachOObjectFile>(Map.getTriple());
if (!Object) {
// Any errors will be diagnosed later in the main loop, ignore them here.
llvm::consumeError(Object.takeError());
return false;
}
for (auto &Section : Object->sections()) {
llvm::Expected<llvm::StringRef> NameOrErr =
Object->getSectionName(Section.getRawDataRefImpl());
if (!NameOrErr) {
llvm::consumeError(NameOrErr.takeError());
continue;
}
NameOrErr->consume_back("__TEXT");
if (Object->mapReflectionSectionNameToEnumValue(*NameOrErr) !=
llvm::swift::Swift5ReflectionSectionKind::unknown) {
return true;
}
}
}
return false;
}
static void
copySwiftReflectionMetadata(const llvm::dsymutil::DebugMapObject *Obj,
DwarfStreamer *Streamer) {
auto OF =
llvm::object::ObjectFile::createObjectFile(Obj->getObjectFilename());
if (!OF) {
llvm::consumeError(OF.takeError());
return;
} else if (auto *MO =
dyn_cast<llvm::object::MachOObjectFile>(OF->getBinary())) {
for (auto &Section : OF->getBinary()->sections()) {
llvm::Expected<llvm::StringRef> NameOrErr =
MO->getSectionName(Section.getRawDataRefImpl());
if (!NameOrErr) {
llvm::consumeError(NameOrErr.takeError());
continue;
}
llvm::Expected<llvm::StringRef> SectionContents = Section.getContents();
if (SectionContents) {
NameOrErr->consume_back("__TEXT");
Streamer->emitSwiftReflectionSection(
MO->mapReflectionSectionNameToEnumValue(*NameOrErr),
*SectionContents, Section.getAlignment(), Section.getSize());
}
}
}
}
bool DwarfLinkerForBinary::link(const DebugMap &Map) {
if (!createStreamer(Map.getTriple(), OutFile))
return false;
@@ -389,8 +461,20 @@ bool DwarfLinkerForBinary::link(const DebugMap &Map) {
llvm_unreachable("Unhandled DebugMap object");
});
GeneralLinker.setSwiftInterfacesMap(&ParseableSwiftInterfaces);
bool ReflectionSectionsPresentInBinary = false;
// If there is no output specified, no point in checking the binary for swift5
// reflection sections.
if (!Options.NoOutput) {
ReflectionSectionsPresentInBinary =
binaryHasSwiftReflectionSections(Map, Options, BinHolder);
}
for (const auto &Obj : Map.objects()) {
// If there is no output specified or the reflection sections are present in
// the Input binary, there is no need to copy the Swift Reflection Metadata
if (!Options.NoOutput && !ReflectionSectionsPresentInBinary)
copySwiftReflectionMetadata(Obj.get(), Streamer.get());
// N_AST objects (swiftmodule files) should get dumped directly into the
// appropriate DWARF section.
if (Obj->getType() == MachO::N_AST) {
@@ -431,7 +515,6 @@ bool DwarfLinkerForBinary::link(const DebugMap &Map) {
continue;
}
if (auto ErrorOrObj = loadObject(*Obj, Map, RL))
GeneralLinker.addObjectFile(*ErrorOrObj);
else {