aprantl created this revision.
The DWO handling code can get confused by clang modules which also use skeleton
CUs to point to the object file with the full debug info. This patch detects
whether an object is a "real" DWO or a clang module and prevents LLDB from
interpreting clang modules as DWO. This fixes the regression in
TestWithModuleDebugging.
http://llvm.org/bugs/show_bug.cgi?id=33875
Repository:
rL LLVM
https://reviews.llvm.org/D35740
Files:
source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
Index: source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
+++ source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
@@ -61,6 +61,12 @@
}
DWARFCompileUnit *SymbolFileDWARFDwo::GetCompileUnit() {
+ // A clang module is found via a skeleton CU, but is not a proper DWO.
+ // Clang modules have a .debug_info section instead of the *_dwo variant.
+ if (auto *section_list = m_obj_file->GetSectionList(false))
+ if (section_list->FindSectionByType(eSectionTypeDWARFDebugInfo, true))
+ return nullptr;
+
// Only dwo files with 1 compile unit is supported
if (GetNumCompileUnits() == 1)
return DebugInfo()->GetCompileUnitAtIndex(0);
Index: source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
+++ source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
@@ -61,6 +61,12 @@
}
DWARFCompileUnit *SymbolFileDWARFDwo::GetCompileUnit() {
+ // A clang module is found via a skeleton CU, but is not a proper DWO.
+ // Clang modules have a .debug_info section instead of the *_dwo variant.
+ if (auto *section_list = m_obj_file->GetSectionList(false))
+ if (section_list->FindSectionByType(eSectionTypeDWARFDebugInfo, true))
+ return nullptr;
+
// Only dwo files with 1 compile unit is supported
if (GetNumCompileUnits() == 1)
return DebugInfo()->GetCompileUnitAtIndex(0);
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