1 files changed, 153 insertions, 0 deletions
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
new file mode 100644
index 000000000000..b0f7e813d4f8
--- /dev/null
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
@@ -0,0 +1,153 @@
+//===-- SymbolFileDWARFDwo.cpp ----------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "SymbolFileDWARFDwo.h"
+
+#include "lldb/Core/Section.h"
+#include "lldb/Expression/DWARFExpression.h"
+#include "lldb/Symbol/ObjectFile.h"
+#include "lldb/Utility/LLDBAssert.h"
+#include "llvm/Support/Casting.h"
+
+#include "DWARFCompileUnit.h"
+#include "DWARFDebugInfo.h"
+#include "DWARFUnit.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+SymbolFileDWARFDwo::SymbolFileDWARFDwo(ObjectFileSP objfile,
+                                       DWARFCompileUnit &dwarf_cu)
+    : SymbolFileDWARF(objfile, objfile->GetSectionList(
+                                   /*update_module_section_list*/ false)),
+      m_base_dwarf_cu(dwarf_cu) {
+  SetID(((lldb::user_id_t)dwarf_cu.GetID()) << 32);
+}
+
+void SymbolFileDWARFDwo::LoadSectionData(lldb::SectionType sect_type,
+                                         DWARFDataExtractor &data) {
+  const SectionList *section_list =
+      m_objfile_sp->GetSectionList(false /* update_module_section_list */);
+  if (section_list) {
+    SectionSP section_sp(section_list->FindSectionByType(sect_type, true));
+    if (section_sp) {
+
+      if (m_objfile_sp->ReadSectionData(section_sp.get(), data) != 0)
+        return;
+
+      data.Clear();
+    }
+  }
+
+  SymbolFileDWARF::LoadSectionData(sect_type, data);
+}
+
+lldb::CompUnitSP
+SymbolFileDWARFDwo::ParseCompileUnit(DWARFCompileUnit &dwarf_cu) {
+  assert(GetCompileUnit() == &dwarf_cu &&
+         "SymbolFileDWARFDwo::ParseCompileUnit called with incompatible "
+         "compile unit");
+  return GetBaseSymbolFile().ParseCompileUnit(m_base_dwarf_cu);
+}
+
+DWARFCompileUnit *SymbolFileDWARFDwo::GetCompileUnit() {
+  if (!m_cu)
+    m_cu = ComputeCompileUnit();
+  return m_cu;
+}
+
+DWARFCompileUnit *SymbolFileDWARFDwo::ComputeCompileUnit() {
+  DWARFDebugInfo *debug_info = DebugInfo();
+  if (!debug_info)
+    return nullptr;
+
+  // Right now we only support dwo files with one compile unit. If we don't have
+  // type units, we can just check for the unit count.
+  if (!debug_info->ContainsTypeUnits() && debug_info->GetNumUnits() == 1)
+    return llvm::cast<DWARFCompileUnit>(debug_info->GetUnitAtIndex(0));
+
+  // Otherwise, we have to run through all units, and find the compile unit that
+  // way.
+  DWARFCompileUnit *cu = nullptr;
+  for (size_t i = 0; i < debug_info->GetNumUnits(); ++i) {
+    if (auto *candidate =
+            llvm::dyn_cast<DWARFCompileUnit>(debug_info->GetUnitAtIndex(i))) {
+      if (cu)
+        return nullptr; // More that one CU found.
+      cu = candidate;
+    }
+  }
+  return cu;
+}
+
+DWARFUnit *
+SymbolFileDWARFDwo::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit) {
+  return GetCompileUnit();
+}
+
+SymbolFileDWARF::DIEToTypePtr &SymbolFileDWARFDwo::GetDIEToType() {
+  return GetBaseSymbolFile().GetDIEToType();
+}
+
+SymbolFileDWARF::DIEToVariableSP &SymbolFileDWARFDwo::GetDIEToVariable() {
+  return GetBaseSymbolFile().GetDIEToVariable();
+}
+
+SymbolFileDWARF::DIEToClangType &
+SymbolFileDWARFDwo::GetForwardDeclDieToClangType() {
+  return GetBaseSymbolFile().GetForwardDeclDieToClangType();
+}
+
+SymbolFileDWARF::ClangTypeToDIE &
+SymbolFileDWARFDwo::GetForwardDeclClangTypeToDie() {
+  return GetBaseSymbolFile().GetForwardDeclClangTypeToDie();
+}
+
+size_t SymbolFileDWARFDwo::GetObjCMethodDIEOffsets(
+    lldb_private::ConstString class_name, DIEArray &method_die_offsets) {
+  return GetBaseSymbolFile().GetObjCMethodDIEOffsets(class_name,
+                                                     method_die_offsets);
+}
+
+UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
+  return GetBaseSymbolFile().GetUniqueDWARFASTTypeMap();
+}
+
+lldb::TypeSP SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(
+    const DWARFDeclContext &die_decl_ctx) {
+  return GetBaseSymbolFile().FindDefinitionTypeForDWARFDeclContext(
+      die_decl_ctx);
+}
+
+lldb::TypeSP SymbolFileDWARFDwo::FindCompleteObjCDefinitionTypeForDIE(
+    const DWARFDIE &die, lldb_private::ConstString type_name,
+    bool must_be_implementation) {
+  return GetBaseSymbolFile().FindCompleteObjCDefinitionTypeForDIE(
+      die, type_name, must_be_implementation);
+}
+
+SymbolFileDWARF &SymbolFileDWARFDwo::GetBaseSymbolFile() {
+  return m_base_dwarf_cu.GetSymbolFileDWARF();
+}
+
+DWARFExpression::LocationListFormat
+SymbolFileDWARFDwo::GetLocationListFormat() const {
+  return DWARFExpression::SplitDwarfLocationList;
+}
+
+llvm::Expected<TypeSystem &>
+SymbolFileDWARFDwo::GetTypeSystemForLanguage(LanguageType language) {
+  return GetBaseSymbolFile().GetTypeSystemForLanguage(language);
+}
+
+DWARFDIE
+SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {
+  if (*die_ref.dwo_num() == GetDwoNum())
+    return DebugInfo()->GetDIE(die_ref);
+  return GetBaseSymbolFile().GetDIE(die_ref);
+}