[LLDB] Remove cases of using namespace llvm:: from header file

We have using namespace llvm::dwarf in dwarf.h header globally. Replacing that
with a using namespace within lldb_private::dwarf and moving to a
using namespace lldb_private::dwarf in .cpp files and fully qualified names
in the few header files.

Differential Revision: https://reviews.llvm.org/D120836

lldb/include/lldb/Core/dwarf.h

@@ -15,8 +15,11 @@
 // Get the DWARF constant definitions from llvm
 #include "llvm/BinaryFormat/Dwarf.h"
 
-// and stuff them in our default namespace
-using namespace llvm::dwarf;
+namespace lldb_private {
+namespace dwarf {
+  using namespace llvm::dwarf;
+}
+}
 
 typedef uint32_t dw_uleb128_t;
 typedef int32_t dw_sleb128_t;

lldb/include/lldb/Symbol/DWARFCallFrameInfo.h

@@ -106,7 +106,8 @@ private:
     CIE(dw_offset_t offset)
         : cie_offset(offset), version(-1), code_align(0), data_align(0),
           return_addr_reg_num(LLDB_INVALID_REGNUM), inst_offset(0),
-          inst_length(0), ptr_encoding(0), lsda_addr_encoding(DW_EH_PE_omit),
+          inst_length(0), ptr_encoding(0),
+          lsda_addr_encoding(llvm::dwarf::DW_EH_PE_omit),
           personality_loc(LLDB_INVALID_ADDRESS) {}
   };
 

lldb/source/Expression/DWARFExpression.cpp

@@ -43,6 +43,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 static lldb::addr_t
 ReadAddressFromDebugAddrSection(const DWARFUnit *dwarf_cu,

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

@@ -16,6 +16,7 @@
 
 using namespace lldb_private;
 using namespace lldb;
+using namespace lldb_private::dwarf;
 
 std::unique_ptr<AppleDWARFIndex> AppleDWARFIndex::Create(
     Module &module, DWARFDataExtractor apple_names,

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

@@ -57,6 +57,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 DWARFASTParserClang::DWARFASTParserClang(TypeSystemClang &ast)
     : m_ast(ast), m_die_to_decl_ctx(), m_decl_ctx_to_die() {}
 

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

@@ -16,6 +16,7 @@
 #include "DWARFFormValue.h"
 
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration() : m_attributes() {}
 

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

@@ -10,6 +10,8 @@
 #include "DWARFUnit.h"
 #include "DWARFDebugInfo.h"
 
+using namespace lldb_private::dwarf;
+
 DWARFAttributes::DWARFAttributes() : m_infos() {}
 
 DWARFAttributes::~DWARFAttributes() = default;

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

@@ -15,6 +15,7 @@
 #include "DWARFUnit.h"
 
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 namespace {
 

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

@@ -31,6 +31,7 @@
 #include "SymbolFileDWARFDwo.h"
 
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 using namespace std;
 extern int g_verbose;
 

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

@@ -14,6 +14,7 @@
 #include "DWARFDataExtractor.h"
 
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 DWARFDebugMacroHeader
 DWARFDebugMacroHeader::ParseHeader(const DWARFDataExtractor &debug_macro_data,

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

@@ -8,6 +8,8 @@
 
 #include "DWARFDeclContext.h"
 
+using namespace lldb_private::dwarf;
+
 const char *DWARFDeclContext::GetQualifiedName() const {
   if (m_qualified_name.empty()) {
     // The declaration context array for a class named "foo" in namespace

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

@@ -20,6 +20,7 @@
 class DWARFUnit;
 
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 void DWARFFormValue::Clear() {
   m_unit = nullptr;

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

@@ -25,6 +25,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 using namespace std;
 
 extern int g_verbose;

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

@@ -69,7 +69,8 @@ public:
   dw_offset_t GetTypeOffset() const { return m_type_offset; }
   uint64_t GetDWOId() const { return m_dwo_id; }
   bool IsTypeUnit() const {
-    return m_unit_type == DW_UT_type || m_unit_type == DW_UT_split_type;
+    return m_unit_type == llvm::dwarf::DW_UT_type ||
+           m_unit_type == llvm::dwarf::DW_UT_split_type;
   }
   uint32_t GetNextUnitOffset() const { return m_offset + m_length + 4; }
 

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

@@ -16,6 +16,7 @@
 
 using namespace lldb_private;
 using namespace lldb;
+using namespace lldb_private::dwarf;
 
 llvm::Expected<std::unique_ptr<DebugNamesDWARFIndex>>
 DebugNamesDWARFIndex::Create(Module &module, DWARFDataExtractor debug_names,

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

@@ -9,6 +9,8 @@
 #include "HashedNameToDIE.h"
 #include "llvm/ADT/StringRef.h"
 
+using namespace lldb_private::dwarf;
+
 bool DWARFMappedHash::ExtractDIEArray(
     const DIEInfoArray &die_info_array,
     llvm::function_ref<bool(DIERef ref)> callback) {

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

@@ -25,6 +25,7 @@
 
 using namespace lldb_private;
 using namespace lldb;
+using namespace lldb_private::dwarf;
 
 void ManualDWARFIndex::Index() {
   if (m_indexed)

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

@@ -96,6 +96,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 LLDB_PLUGIN_DEFINE(SymbolFileDWARF)
 

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

@@ -10,6 +10,8 @@
 
 #include "lldb/Core/Declaration.h"
 
+using namespace lldb_private::dwarf;
+
 bool UniqueDWARFASTTypeList::Find(const DWARFDIE &die,
                                   const lldb_private::Declaration &decl,
                                   const int32_t byte_size,

lldb/source/Plugins/SymbolFile/PDB/PDBLocationToDWARFExpression.cpp

@@ -25,6 +25,7 @@
 using namespace lldb;
 using namespace lldb_private;
 using namespace lldb_private::npdb;
+using namespace lldb_private::dwarf;
 using namespace llvm::pdb;
 
 static std::unique_ptr<IPDBFrameData>

lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp

@@ -80,6 +80,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 using namespace clang;
 using llvm::StringSwitch;
 

lldb/source/Symbol/DWARFCallFrameInfo.cpp

@@ -24,6 +24,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 // GetDwarfEHPtr
 //

lldb/source/Symbol/PostfixExpression.cpp

@@ -18,6 +18,7 @@
 
 using namespace lldb_private;
 using namespace lldb_private::postfix;
+using namespace lldb_private::dwarf;
 
 static llvm::Optional<BinaryOpNode::OpType>
 GetBinaryOpType(llvm::StringRef token) {

lldb/unittests/Expression/DWARFExpressionTest.cpp

@@ -22,6 +22,7 @@
 #include "gtest/gtest.h"
 
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 static llvm::Expected<Scalar> Evaluate(llvm::ArrayRef<uint8_t> expr,
                                        lldb::ModuleSP module_sp = {},

lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp

@@ -15,6 +15,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 namespace {
 class DWARFASTParserClangTests : public testing::Test {};

lldb/unittests/SymbolFile/DWARF/SymbolFileDWARFTests.cpp

@@ -39,6 +39,7 @@
 
 using namespace lldb;
 using namespace lldb_private;
+using namespace lldb_private::dwarf;
 
 class SymbolFileDWARFTests : public testing::Test {
   SubsystemRAII<FileSystem, HostInfo, ObjectFilePECOFF, SymbolFileDWARF,