Add support for the DWP debug info format

Summary:
The DWP (DWARF package) format is used to pack multiple dwo files
generated by split-dwarf into a single ELF file to make distributing
them easier. It is part of the DWARFv5 spec and can be generated by
dwp or llvm-dwp from a set of dwo files.

Caviats:
* Only the new version of the dwp format is supported (v2 in GNU
  numbering schema and v5 in the DWARF spec). The old version (v1) is
  already deprecated but binutils 2.24 still generates that one.
* Combining DWP files with module debugging is not yet supported.

Subscribers: emaste, mgorny, aprantl

Differential Revision: https://reviews.llvm.org/D36062

llvm-svn: 311775

1 files changed, 11 insertions, 7 deletions

diff --git a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
index 83cab432311..aca1b6b4b97 100644
--- a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
+++ b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
@@ -1835,6 +1835,7 @@ void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
       static ConstString g_sect_name_dwarf_debug_abbrev(".debug_abbrev");
       static ConstString g_sect_name_dwarf_debug_addr(".debug_addr");
       static ConstString g_sect_name_dwarf_debug_aranges(".debug_aranges");
+      static ConstString g_sect_name_dwarf_debug_cu_index(".debug_cu_index");
       static ConstString g_sect_name_dwarf_debug_frame(".debug_frame");
       static ConstString g_sect_name_dwarf_debug_info(".debug_info");
       static ConstString g_sect_name_dwarf_debug_line(".debug_line");
@@ -1904,6 +1905,8 @@ void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
         sect_type = eSectionTypeDWARFDebugAddr;
       else if (name == g_sect_name_dwarf_debug_aranges)
         sect_type = eSectionTypeDWARFDebugAranges;
+      else if (name == g_sect_name_dwarf_debug_cu_index)
+        sect_type = eSectionTypeDWARFDebugCuIndex;
       else if (name == g_sect_name_dwarf_debug_frame)
         sect_type = eSectionTypeDWARFDebugFrame;
       else if (name == g_sect_name_dwarf_debug_info)
@@ -2017,13 +2020,14 @@ void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
   if (m_sections_ap.get()) {
     if (GetType() == eTypeDebugInfo) {
       static const SectionType g_sections[] = {
-          eSectionTypeDWARFDebugAbbrev,     eSectionTypeDWARFDebugAddr,
-          eSectionTypeDWARFDebugAranges,    eSectionTypeDWARFDebugFrame,
-          eSectionTypeDWARFDebugInfo,       eSectionTypeDWARFDebugLine,
-          eSectionTypeDWARFDebugLoc,        eSectionTypeDWARFDebugMacInfo,
-          eSectionTypeDWARFDebugPubNames,   eSectionTypeDWARFDebugPubTypes,
-          eSectionTypeDWARFDebugRanges,     eSectionTypeDWARFDebugStr,
-          eSectionTypeDWARFDebugStrOffsets, eSectionTypeELFSymbolTable,
+          eSectionTypeDWARFDebugAbbrev,   eSectionTypeDWARFDebugAddr,
+          eSectionTypeDWARFDebugAranges,  eSectionTypeDWARFDebugCuIndex,
+          eSectionTypeDWARFDebugFrame,    eSectionTypeDWARFDebugInfo,
+          eSectionTypeDWARFDebugLine,     eSectionTypeDWARFDebugLoc,
+          eSectionTypeDWARFDebugMacInfo,  eSectionTypeDWARFDebugPubNames,
+          eSectionTypeDWARFDebugPubTypes, eSectionTypeDWARFDebugRanges,
+          eSectionTypeDWARFDebugStr,      eSectionTypeDWARFDebugStrOffsets,
+          eSectionTypeELFSymbolTable,
       };
       SectionList *elf_section_list = m_sections_ap.get();
       for (size_t idx = 0; idx < sizeof(g_sections) / sizeof(g_sections[0]);