DebugInfo: Support debug_loc under fission
Implement debug_loc.dwo, as well as llvm-dwarfdump support for dumping
this section.
Outlined in the DWARF5 spec and http://gcc.gnu.org/wiki/DebugFission the
debug_loc.dwo section has more variation than the standard debug_loc,
allowing 3 different forms of entry (plus the end of list entry). GCC
seems to, and Clang certainly, only use one form, so I've just
implemented dumping support for that for now.
It wasn't immediately obvious that there was a good refactoring to share
the implementation of dumping support between debug_loc and
debug_loc.dwo, so they're separate for now - ideas welcome or I may come
back to it at some point.
As per a comment in the code, we could choose different forms that may
reduce the number of debug_addr entries we emit, but that will require
further study.
llvm-svn: 204697
diff --git a/llvm/lib/DebugInfo/DWARFContext.h b/llvm/lib/DebugInfo/DWARFContext.h
index a3bae79..ad6841a 100644
--- a/llvm/lib/DebugInfo/DWARFContext.h
+++ b/llvm/lib/DebugInfo/DWARFContext.h
@@ -42,6 +42,7 @@
CUVector DWOCUs;
TUVector DWOTUs;
std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
+ std::unique_ptr<DWARFDebugLocDWO> LocDWO;
DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
@@ -148,6 +149,9 @@
/// Get a pointer to the parsed dwo abbreviations object.
const DWARFDebugAbbrev *getDebugAbbrevDWO();
+ /// Get a pointer to the parsed DebugLoc object.
+ const DWARFDebugLocDWO *getDebugLocDWO();
+
/// Get a pointer to the parsed DebugAranges object.
const DWARFDebugAranges *getDebugAranges();
@@ -173,6 +177,7 @@
virtual const TypeSectionMap &getTypesSections() = 0;
virtual StringRef getAbbrevSection() = 0;
virtual const Section &getLocSection() = 0;
+ virtual const Section &getLocDWOSection() = 0;
virtual StringRef getARangeSection() = 0;
virtual StringRef getDebugFrameSection() = 0;
virtual const Section &getLineSection() = 0;
@@ -216,6 +221,7 @@
TypeSectionMap TypesSections;
StringRef AbbrevSection;
Section LocSection;
+ Section LocDWOSection;
StringRef ARangeSection;
StringRef DebugFrameSection;
Section LineSection;
@@ -246,6 +252,7 @@
const TypeSectionMap &getTypesSections() override { return TypesSections; }
StringRef getAbbrevSection() override { return AbbrevSection; }
const Section &getLocSection() override { return LocSection; }
+ const Section &getLocDWOSection() override { return LocDWOSection; }
StringRef getARangeSection() override { return ARangeSection; }
StringRef getDebugFrameSection() override { return DebugFrameSection; }
const Section &getLineSection() override { return LineSection; }