[llvm] Revert "[dsymutil] Remove support for obfuscated bitcode" (PR #85826)
via llvm-commits
llvm-commits at lists.llvm.org
Tue Mar 19 10:16:42 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-debuginfo
Author: Andres Villegas (avillega)
<details>
<summary>Changes</summary>
Reverts llvm/llvm-project#<!-- -->85713 Since it is breaking Linux x64 builds.
---
Patch is 40.26 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/85826.diff
30 Files Affected:
- (modified) llvm/docs/CommandGuide/dsymutil.rst (+4)
- (modified) llvm/include/llvm/CodeGen/NonRelocatableStringpool.h (+5-1)
- (modified) llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h (+6-2)
- (modified) llvm/include/llvm/DWARFLinker/DWARFLinkerBase.h (+1)
- (modified) llvm/include/llvm/DWARFLinker/Parallel/DWARFLinker.h (+2-1)
- (modified) llvm/lib/CodeGen/NonRelocatableStringpool.cpp (+5)
- (modified) llvm/lib/DWARFLinker/Classic/DWARFLinker.cpp (+2-2)
- (modified) llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp (+7-5)
- (modified) llvm/lib/DWARFLinker/Parallel/DWARFLinker.cpp (+4-2)
- (modified) llvm/lib/DWARFLinker/Parallel/DWARFLinkerGlobalData.h (+15)
- (modified) llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.cpp (+3-1)
- (modified) llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.h (+2-1)
- (modified) llvm/lib/DWARFLinker/Parallel/OutputSections.h (+1-1)
- (modified) llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h (+1-1)
- (added) llvm/test/tools/dsymutil/ARM/obfuscated.test (+200)
- (added) llvm/test/tools/dsymutil/Inputs/obfuscated.2.arm64 ()
- (added) llvm/test/tools/dsymutil/Inputs/obfuscated.2.map (+22)
- (added) llvm/test/tools/dsymutil/Inputs/obfuscated.arm64 ()
- (added) llvm/test/tools/dsymutil/Inputs/obfuscated.map (+17)
- (modified) llvm/test/tools/dsymutil/cmdline.test (+1)
- (modified) llvm/tools/dsymutil/CMakeLists.txt (+1)
- (modified) llvm/tools/dsymutil/DwarfLinkerForBinary.cpp (+10-4)
- (modified) llvm/tools/dsymutil/LinkUtils.h (+5)
- (modified) llvm/tools/dsymutil/MachOUtils.cpp (+5-2)
- (modified) llvm/tools/dsymutil/MachOUtils.h (+3-1)
- (modified) llvm/tools/dsymutil/Options.td (+6)
- (added) llvm/tools/dsymutil/SymbolMap.cpp (+157)
- (added) llvm/tools/dsymutil/SymbolMap.h (+53)
- (modified) llvm/tools/dsymutil/dsymutil.cpp (+14-1)
- (modified) llvm/tools/llvm-dwarfutil/DebugInfoLinker.cpp (+3-3)
``````````diff
diff --git a/llvm/docs/CommandGuide/dsymutil.rst b/llvm/docs/CommandGuide/dsymutil.rst
index e3f2f33224b015..af9d7f16b36196 100644
--- a/llvm/docs/CommandGuide/dsymutil.rst
+++ b/llvm/docs/CommandGuide/dsymutil.rst
@@ -140,6 +140,10 @@ OPTIONS
(in bytes) to the linked dSYM. The table is sorted by the output size listing
the object files with the largest contribution first.
+.. option:: --symbol-map <bcsymbolmap>
+
+ Update the existing dSYMs inplace using symbol map specified.
+
.. option:: -s, --symtab
Dumps the symbol table found in *executable* or object file(s) and exits.
diff --git a/llvm/include/llvm/CodeGen/NonRelocatableStringpool.h b/llvm/include/llvm/CodeGen/NonRelocatableStringpool.h
index 4b8eed7bdb1b53..3dc0731f5a04ee 100644
--- a/llvm/include/llvm/CodeGen/NonRelocatableStringpool.h
+++ b/llvm/include/llvm/CodeGen/NonRelocatableStringpool.h
@@ -27,7 +27,10 @@ class NonRelocatableStringpool {
/// order.
using MapTy = StringMap<DwarfStringPoolEntry, BumpPtrAllocator>;
- NonRelocatableStringpool(bool PutEmptyString = false) {
+ NonRelocatableStringpool(
+ std::function<StringRef(StringRef Input)> Translator = nullptr,
+ bool PutEmptyString = false)
+ : Translator(Translator) {
if (PutEmptyString)
getEntry("");
}
@@ -56,6 +59,7 @@ class NonRelocatableStringpool {
MapTy Strings;
uint64_t CurrentEndOffset = 0;
unsigned NumEntries = 0;
+ std::function<StringRef(StringRef Input)> Translator;
};
/// Helper for making strong types.
diff --git a/llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h b/llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h
index e7a1a3cd838c22..bebdfd5e60257e 100644
--- a/llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h
+++ b/llvm/include/llvm/DWARFLinker/Classic/DWARFStreamer.h
@@ -45,13 +45,16 @@ class DwarfStreamer : public DwarfEmitter {
public:
DwarfStreamer(DWARFLinkerBase::OutputFileType OutFileType,
raw_pwrite_stream &OutFile,
+ DWARFLinkerBase::TranslatorFuncTy Translator,
DWARFLinkerBase::MessageHandlerTy Warning)
- : OutFile(OutFile), OutFileType(OutFileType), WarningHandler(Warning) {}
+ : OutFile(OutFile), OutFileType(OutFileType), Translator(Translator),
+ WarningHandler(Warning) {}
virtual ~DwarfStreamer() = default;
static Expected<std::unique_ptr<DwarfStreamer>> createStreamer(
const Triple &TheTriple, DWARFLinkerBase::OutputFileType FileType,
- raw_pwrite_stream &OutFile, DWARFLinkerBase::MessageHandlerTy Warning);
+ raw_pwrite_stream &OutFile, DWARFLinkerBase::TranslatorFuncTy Translator,
+ DWARFLinkerBase::MessageHandlerTy Warning);
Error init(Triple TheTriple, StringRef Swift5ReflectionSegmentName);
@@ -292,6 +295,7 @@ class DwarfStreamer : public DwarfEmitter {
/// The output file we stream the linked Dwarf to.
raw_pwrite_stream &OutFile;
DWARFLinker::OutputFileType OutFileType = DWARFLinker::OutputFileType::Object;
+ std::function<StringRef(StringRef Input)> Translator;
uint64_t RangesSectionSize = 0;
uint64_t RngListsSectionSize = 0;
diff --git a/llvm/include/llvm/DWARFLinker/DWARFLinkerBase.h b/llvm/include/llvm/DWARFLinker/DWARFLinkerBase.h
index 70b25cf02df7f8..5c811b668f0a31 100644
--- a/llvm/include/llvm/DWARFLinker/DWARFLinkerBase.h
+++ b/llvm/include/llvm/DWARFLinker/DWARFLinkerBase.h
@@ -82,6 +82,7 @@ class DWARFLinkerBase {
std::function<void(const DWARFFile &File, llvm::StringRef Output)>;
using ObjectPrefixMapTy = std::map<std::string, std::string>;
using CompileUnitHandlerTy = function_ref<void(const DWARFUnit &Unit)>;
+ using TranslatorFuncTy = std::function<StringRef(StringRef)>;
using SwiftInterfacesMapTy = std::map<std::string, std::string>;
/// Type of output file.
enum class OutputFileType : uint8_t {
diff --git a/llvm/include/llvm/DWARFLinker/Parallel/DWARFLinker.h b/llvm/include/llvm/DWARFLinker/Parallel/DWARFLinker.h
index 8acc046d072493..5312712a4a5b81 100644
--- a/llvm/include/llvm/DWARFLinker/Parallel/DWARFLinker.h
+++ b/llvm/include/llvm/DWARFLinker/Parallel/DWARFLinker.h
@@ -123,7 +123,8 @@ class DWARFLinker : public DWARFLinkerBase {
/// Creates dwarf linker instance.
static std::unique_ptr<DWARFLinker>
- createLinker(MessageHandlerTy ErrorHandler, MessageHandlerTy WarningHandler);
+ createLinker(MessageHandlerTy ErrorHandler, MessageHandlerTy WarningHandler,
+ TranslatorFuncTy StringsTranslator = nullptr);
/// Set output DWARF handler. Result of linking DWARF is set of sections
/// containing final debug info. DWARFLinkerBase::link() pass generated
diff --git a/llvm/lib/CodeGen/NonRelocatableStringpool.cpp b/llvm/lib/CodeGen/NonRelocatableStringpool.cpp
index 26857c6a40889d..e8391afb8e3f8d 100644
--- a/llvm/lib/CodeGen/NonRelocatableStringpool.cpp
+++ b/llvm/lib/CodeGen/NonRelocatableStringpool.cpp
@@ -12,6 +12,8 @@
namespace llvm {
DwarfStringPoolEntryRef NonRelocatableStringpool::getEntry(StringRef S) {
+ if (Translator)
+ S = Translator(S);
auto I = Strings.insert({S, DwarfStringPoolEntry()});
auto &Entry = I.first->second;
if (I.second || !Entry.isIndexed()) {
@@ -26,6 +28,9 @@ DwarfStringPoolEntryRef NonRelocatableStringpool::getEntry(StringRef S) {
StringRef NonRelocatableStringpool::internString(StringRef S) {
DwarfStringPoolEntry Entry{nullptr, 0, DwarfStringPoolEntry::NotIndexed};
+ if (Translator)
+ S = Translator(S);
+
auto InsertResult = Strings.insert({S, Entry});
return InsertResult.first->getKey();
}
diff --git a/llvm/lib/DWARFLinker/Classic/DWARFLinker.cpp b/llvm/lib/DWARFLinker/Classic/DWARFLinker.cpp
index 60f664ece7eef9..9b581a6c9ab774 100644
--- a/llvm/lib/DWARFLinker/Classic/DWARFLinker.cpp
+++ b/llvm/lib/DWARFLinker/Classic/DWARFLinker.cpp
@@ -2701,8 +2701,8 @@ Error DWARFLinker::link() {
// This Dwarf string pool which is used for emission. It must be used
// serially as the order of calling getStringOffset matters for
// reproducibility.
- OffsetsStringPool DebugStrPool(true);
- OffsetsStringPool DebugLineStrPool(false);
+ OffsetsStringPool DebugStrPool(StringsTranslator, true);
+ OffsetsStringPool DebugLineStrPool(StringsTranslator, false);
DebugDieValuePool StringOffsetPool;
// ODR Contexts for the optimize.
diff --git a/llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp b/llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp
index 8b31b5ead29ad0..6d522370e440d1 100644
--- a/llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp
+++ b/llvm/lib/DWARFLinker/Classic/DWARFStreamer.cpp
@@ -32,9 +32,10 @@ using namespace dwarf_linker::classic;
Expected<std::unique_ptr<DwarfStreamer>> DwarfStreamer::createStreamer(
const Triple &TheTriple, DWARFLinkerBase::OutputFileType FileType,
- raw_pwrite_stream &OutFile, DWARFLinkerBase::MessageHandlerTy Warning) {
+ raw_pwrite_stream &OutFile, DWARFLinkerBase::TranslatorFuncTy Translator,
+ DWARFLinkerBase::MessageHandlerTy Warning) {
std::unique_ptr<DwarfStreamer> Streamer =
- std::make_unique<DwarfStreamer>(FileType, OutFile, Warning);
+ std::make_unique<DwarfStreamer>(FileType, OutFile, Translator, Warning);
if (Error Err = Streamer->init(TheTriple, "__DWARF"))
return std::move(Err);
@@ -976,10 +977,11 @@ void DwarfStreamer::emitLineTableString(const DWARFDebugLine::Prologue &P,
switch (String.getForm()) {
case dwarf::DW_FORM_string: {
- StringRef Str = *StringVal;
- Asm->OutStreamer->emitBytes(Str.data());
+ StringRef TranslatedString =
+ (Translator) ? Translator(*StringVal) : *StringVal;
+ Asm->OutStreamer->emitBytes(TranslatedString.data());
Asm->emitInt8(0);
- LineSectionSize += Str.size() + 1;
+ LineSectionSize += TranslatedString.size() + 1;
} break;
case dwarf::DW_FORM_strp:
case dwarf::DW_FORM_line_strp: {
diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFLinker.cpp b/llvm/lib/DWARFLinker/Parallel/DWARFLinker.cpp
index 31c7e867767a0f..ad8d28a643174a 100644
--- a/llvm/lib/DWARFLinker/Parallel/DWARFLinker.cpp
+++ b/llvm/lib/DWARFLinker/Parallel/DWARFLinker.cpp
@@ -15,6 +15,8 @@ using namespace dwarf_linker::parallel;
std::unique_ptr<DWARFLinker>
DWARFLinker::createLinker(MessageHandlerTy ErrorHandler,
- MessageHandlerTy WarningHandler) {
- return std::make_unique<DWARFLinkerImpl>(ErrorHandler, WarningHandler);
+ MessageHandlerTy WarningHandler,
+ TranslatorFuncTy StringsTranslator) {
+ return std::make_unique<DWARFLinkerImpl>(ErrorHandler, WarningHandler,
+ StringsTranslator);
}
diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerGlobalData.h b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerGlobalData.h
index 7ca81eb34f005e..38c261a8106fcd 100644
--- a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerGlobalData.h
+++ b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerGlobalData.h
@@ -21,6 +21,7 @@ class DWARFDie;
namespace dwarf_linker {
namespace parallel {
+using TranslatorFuncTy = std::function<StringRef(StringRef)>;
using MessageHandlerTy = std::function<void(
const Twine &Warning, StringRef Context, const DWARFDie *DIE)>;
@@ -94,6 +95,19 @@ class LinkingGlobalData {
/// Returns global string pool.
StringPool &getStringPool() { return Strings; }
+ /// Set translation function.
+ void setTranslator(TranslatorFuncTy Translator) {
+ this->Translator = Translator;
+ }
+
+ /// Translate specified string.
+ StringRef translateString(StringRef String) {
+ if (Translator)
+ return Translator(String);
+
+ return String;
+ }
+
/// Returns linking options.
const DWARFLinkerOptions &getOptions() const { return Options; }
@@ -147,6 +161,7 @@ class LinkingGlobalData {
protected:
llvm::parallel::PerThreadBumpPtrAllocator Allocator;
StringPool Strings;
+ TranslatorFuncTy Translator;
DWARFLinkerOptions Options;
MessageHandlerTy WarningHandler;
MessageHandlerTy ErrorHandler;
diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.cpp b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.cpp
index e68bf0c227a0a0..49b08997eb9c1c 100644
--- a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.cpp
+++ b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.cpp
@@ -20,9 +20,11 @@ using namespace dwarf_linker;
using namespace dwarf_linker::parallel;
DWARFLinkerImpl::DWARFLinkerImpl(MessageHandlerTy ErrorHandler,
- MessageHandlerTy WarningHandler)
+ MessageHandlerTy WarningHandler,
+ TranslatorFuncTy StringsTranslator)
: UniqueUnitID(0), DebugStrStrings(GlobalData),
DebugLineStrStrings(GlobalData), CommonSections(GlobalData) {
+ GlobalData.setTranslator(StringsTranslator);
GlobalData.setErrorHandler(ErrorHandler);
GlobalData.setWarningHandler(WarningHandler);
}
diff --git a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.h b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.h
index 597bb1b4da59a8..7c17c5b79c7c18 100644
--- a/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.h
+++ b/llvm/lib/DWARFLinker/Parallel/DWARFLinkerImpl.h
@@ -26,7 +26,8 @@ namespace parallel {
class DWARFLinkerImpl : public DWARFLinker {
public:
DWARFLinkerImpl(MessageHandlerTy ErrorHandler,
- MessageHandlerTy WarningHandler);
+ MessageHandlerTy WarningHandler,
+ TranslatorFuncTy StringsTranslator);
/// Add object file to be linked. Pre-load compile unit die. Call
/// \p OnCUDieLoaded for each compile unit die. If specified \p File
diff --git a/llvm/lib/DWARFLinker/Parallel/OutputSections.h b/llvm/lib/DWARFLinker/Parallel/OutputSections.h
index 0e1f2dae54bcc2..a21e4b2b75a503 100644
--- a/llvm/lib/DWARFLinker/Parallel/OutputSections.h
+++ b/llvm/lib/DWARFLinker/Parallel/OutputSections.h
@@ -253,7 +253,7 @@ struct SectionDescriptor : SectionDescriptorBase {
/// Emit specified inplace string value into the current section contents.
void emitInplaceString(StringRef String) {
- OS << String;
+ OS << GlobalData.translateString(String);
emitIntVal(0, 1);
}
diff --git a/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h b/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h
index f67536ef7a1a84..858f224777dba7 100644
--- a/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h
+++ b/llvm/lib/DWARFLinker/Parallel/StringEntryToDwarfStringPoolEntryMap.h
@@ -33,7 +33,7 @@ class StringEntryToDwarfStringPoolEntryMap {
DwarfStringPoolEntryWithExtString *DataPtr =
GlobalData.getAllocator()
.Allocate<DwarfStringPoolEntryWithExtString>();
- DataPtr->String = String->getKey();
+ DataPtr->String = GlobalData.translateString(String->getKey());
DataPtr->Index = DwarfStringPoolEntry::NotIndexed;
DataPtr->Offset = 0;
DataPtr->Symbol = nullptr;
diff --git a/llvm/test/tools/dsymutil/ARM/obfuscated.test b/llvm/test/tools/dsymutil/ARM/obfuscated.test
new file mode 100644
index 00000000000000..3443b8e634692b
--- /dev/null
+++ b/llvm/test/tools/dsymutil/ARM/obfuscated.test
@@ -0,0 +1,200 @@
+REQUIRES: system-darwin
+
+RUN: dsymutil --symbol-map %p/../Inputs/obfuscated.map %p/../Inputs/obfuscated.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck %s
+
+RUN: dsymutil --accelerator=Pub --symbol-map %p/../Inputs/obfuscated.map %p/../Inputs/obfuscated.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck --check-prefix=PUB %s
+
+RUN: dsymutil --symbol-map %p/../Inputs/obfuscated.map %p/../Inputs/obfuscated.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck --check-prefix=NOHIDDEN %s
+
+RUN: dsymutil --symbol-map %p/../Inputs/obfuscated.2.map %p/../Inputs/obfuscated.2.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck --check-prefix=NOHIDDEN %s
+
+// Run with plist and make sure dsymutil finds it.
+RUN: mkdir -p %t.dSYM/Contents/Resources/DWARF/
+RUN: mkdir -p %t.mapdir
+RUN: cp %p/../Inputs/obfuscated.arm64 %t.dSYM/Contents/Resources/DWARF/
+RUN: cp %p/../Inputs/E828A486-8433-3A5E-B6DB-A6294D28133D.plist %t.dSYM/Contents/Resources/
+RUN: cp %p/../Inputs/obfuscated.map %t.mapdir/506AA50A-6B26-3B37-86D2-DC6EBD57B720.bcsymbolmap
+RUN: dsymutil --symbol-map %t.mapdir %t.dSYM 2>&1 | FileCheck --check-prefix=OBFUSCATING %s
+
+// Run without plist and make sure dsymutil doesn't crash.
+RUN: rm %t.dSYM/Contents/Resources/E828A486-8433-3A5E-B6DB-A6294D28133D.plist
+RUN: dsymutil --symbol-map %t.mapdir %t.dSYM 2>&1 | FileCheck --check-prefix=NOTOBFUSCATING %s
+
+// ----------------------------------------
+// Repeat the same steps for --linker parallel.
+RUN: dsymutil --linker parallel --symbol-map %p/../Inputs/obfuscated.map %p/../Inputs/obfuscated.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck %s
+
+RUN: dsymutil --linker parallel --accelerator=Pub --symbol-map %p/../Inputs/obfuscated.map %p/../Inputs/obfuscated.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck --check-prefix=PUB %s
+
+RUN: dsymutil --linker parallel --symbol-map %p/../Inputs/obfuscated.map %p/../Inputs/obfuscated.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck --check-prefix=NOHIDDEN %s
+
+RUN: dsymutil --linker parallel --symbol-map %p/../Inputs/obfuscated.2.map %p/../Inputs/obfuscated.2.arm64 -f -o - \
+RUN: | llvm-dwarfdump -v - \
+RUN: | FileCheck --check-prefix=NOHIDDEN %s
+
+// Run with plist and make sure dsymutil finds it.
+RUN: mkdir -p %t.dSYM/Contents/Resources/DWARF/
+RUN: mkdir -p %t.mapdir
+RUN: cp %p/../Inputs/obfuscated.arm64 %t.dSYM/Contents/Resources/DWARF/
+RUN: cp %p/../Inputs/E828A486-8433-3A5E-B6DB-A6294D28133D.plist %t.dSYM/Contents/Resources/
+RUN: cp %p/../Inputs/obfuscated.map %t.mapdir/506AA50A-6B26-3B37-86D2-DC6EBD57B720.bcsymbolmap
+RUN: dsymutil --linker parallel --symbol-map %t.mapdir %t.dSYM 2>&1 | FileCheck --check-prefix=OBFUSCATING %s
+
+// Run without plist and make sure dsymutil doesn't crash.
+RUN: rm %t.dSYM/Contents/Resources/E828A486-8433-3A5E-B6DB-A6294D28133D.plist
+RUN: dsymutil --linker parallel --symbol-map %t.mapdir %t.dSYM 2>&1 | FileCheck --check-prefix=NOTOBFUSCATING %s
+
+OBFUSCATING-NOT: not unobfuscating
+
+NOTOBFUSCATING: not unobfuscating
+
+NOHIDDEN-NOT: __hidden#
+
+CHECK: .debug_info contents:
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "main.c")
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "main")
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "one.c")
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "one")
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "two.c")
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "two")
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "three.c")
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "three")
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "four.c")
+CHECK: DW_AT_stmt_list [DW_FORM_data4] (0x0000011e)
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "four")
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "five.c")
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "five")
+
+CHECK: DW_TAG_compile_unit [1] *
+CHECK: DW_AT_producer [DW_FORM_strp] ( {{.*}} "Apple LLVM version 7.0.0 (clang-700.2.38.2)")
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "six.c")
+CHECK: DW_AT_comp_dir [DW_FORM_strp] ( {{.*}} "/Users/steven/dev/alpena/tests/src")
+CHECK: DW_TAG_subprogram [2]
+CHECK: DW_AT_name [DW_FORM_strp] ( {{.*}} "six")
+
+CHECK: .debug_line contents:
+CHECK: file_names[ 1]:
+CHECK: name: "main.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: file_names[ 1]:
+CHECK: name: "one.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: length: 0x00000000
+CHECK: file_names[ 1]:
+CHECK: name: "two.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: length: 0x00000000
+CHECK: file_names[ 1]:
+CHECK: name: "three.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: length: 0x00000000
+CHECK: file_names[ 1]:
+CHECK: name: "four.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: length: 0x00000000
+CHECK: file_names[ 1]:
+CHECK: name: "five.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: length: 0x00000000
+CHECK: file_names[ 1]:
+CHECK: name: "six.c"
+CHECK: dir_index: 0
+CHECK: mod_time: 0x00000000
+CHECK: length: 0x00000000
+
+PUB: .debug_pubnames contents:
+PUB: length = 0x00000017, format = DWARF32, version = 0x0002, unit_offset = 0x00000000, unit_size = 0x00000044
+PUB: 0x00000...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/85826
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