[DebugInfo] Add a DWARFDataExtractor constructor that takes ArrayRef<uint8_t>

Similar to D67797 (DataExtractor).

Author: MaskRay

lldb/source/Plugins/SymbolFile/DWARF/DWARFDataExtractor.cpp

@@ -23,8 +23,7 @@ DWARFDataExtractor::GetDWARFOffset(lldb::offset_t *offset_ptr) const {
 
 llvm::DWARFDataExtractor DWARFDataExtractor::GetAsLLVM() const {
   return llvm::DWARFDataExtractor(
-      llvm::StringRef(reinterpret_cast<const char *>(GetDataStart()),
-                      GetByteSize()),
+      llvm::makeArrayRef(GetDataStart(), GetByteSize()),
       GetByteOrder() == lldb::eByteOrderLittle, GetAddressByteSize());
 }
 } // namespace lldb_private

lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp

@@ -468,8 +468,8 @@ void DWARFUnit::SetLoclistsBase(dw_addr_t loclists_base) {
 std::unique_ptr<llvm::DWARFLocationTable>
 DWARFUnit::GetLocationTable(const DataExtractor &data) const {
   llvm::DWARFDataExtractor llvm_data(
-      toStringRef(data.GetData()),
-      data.GetByteOrder() == lldb::eByteOrderLittle, data.GetAddressByteSize());
+      data.GetData(), data.GetByteOrder() == lldb::eByteOrderLittle,
+      data.GetAddressByteSize());
 
   if (m_is_dwo || GetVersion() >= 5)
     return std::make_unique<llvm::DWARFDebugLoclists>(llvm_data, GetVersion());

llvm/include/llvm/DebugInfo/DWARF/DWARFDataExtractor.h

@@ -32,6 +32,11 @@ class DWARFDataExtractor : public DataExtractor {
   /// Constructor for cases when there are no relocations.
   DWARFDataExtractor(StringRef Data, bool IsLittleEndian, uint8_t AddressSize)
     : DataExtractor(Data, IsLittleEndian, AddressSize) {}
+  DWARFDataExtractor(ArrayRef<uint8_t> Data, bool IsLittleEndian,
+                     uint8_t AddressSize)
+      : DataExtractor(
+            StringRef(reinterpret_cast<const char *>(Data.data()), Data.size()),
+            IsLittleEndian, AddressSize) {}
 
   /// Extracts a value and applies a relocation to the result if
   /// one exists for the given offset.

llvm/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp

@@ -109,7 +109,7 @@ DWARFLocationInterpreter::Interpret(const DWARFLocationEntry &E) {
 static void dumpExpression(raw_ostream &OS, ArrayRef<uint8_t> Data,
                            bool IsLittleEndian, unsigned AddressSize,
                            const MCRegisterInfo *MRI, DWARFUnit *U) {
-  DWARFDataExtractor Extractor(toStringRef(Data), IsLittleEndian, AddressSize);
+  DWARFDataExtractor Extractor(Data, IsLittleEndian, AddressSize);
   DWARFExpression(Extractor, AddressSize).print(OS, MRI, U);
 }
 

llvm/tools/llvm-readobj/DwarfCFIEHPrinter.h

@@ -186,12 +186,9 @@ void PrinterContext<ELFT>::printEHFrame(
   if (Error E = Result.takeError())
     reportError(std::move(E), ObjF->getFileName());
 
-  auto Contents = Result.get();
-  DWARFDataExtractor DE(
-      StringRef(reinterpret_cast<const char *>(Contents.data()),
-                Contents.size()),
-      ELFT::TargetEndianness == support::endianness::little,
-      ELFT::Is64Bits ? 8 : 4);
+  DWARFDataExtractor DE(*Result,
+                        ELFT::TargetEndianness == support::endianness::little,
+                        ELFT::Is64Bits ? 8 : 4);
   DWARFDebugFrame EHFrame(Triple::ArchType(ObjF->getArch()), /*IsEH=*/true,
                           /*EHFrameAddress=*/Address);
   EHFrame.parse(DE);