[DWARF] - Take relocations in account when extracting ranges from .debug_ranges

I found this when investigated "Bug 32319 - .gdb_index is broken/incomplete" for LLD.

When we have object file with .debug_ranges section it may be filled with zeroes.
Relocations are exist in file to relocate this zeroes into real values later, but until that
a pair of zeroes is treated as terminator. And DWARF parser thinks there is no ranges at all
when I am trying to collect address ranges for building .gdb_index.

Solution implemented in this patch is to take relocations in account when parsing ranges.

Differential revision: https://reviews.llvm.org/D32228

llvm-svn: 301170

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/tools/dsymutil/DwarfLinker.cpp b/llvm/tools/dsymutil/DwarfLinker.cpp
index ce991290d6a..f74d721e614 100644
--- a/llvm/tools/dsymutil/DwarfLinker.cpp
+++ b/llvm/tools/dsymutil/DwarfLinker.cpp
@@ -2869,7 +2869,7 @@ void DwarfLinker::patchRangesForUnit(const CompileUnit &Unit,
   DWARFDebugRangeList RangeList;
   const auto &FunctionRanges = Unit.getFunctionRanges();
   unsigned AddressSize = Unit.getOrigUnit().getAddressByteSize();
-  DataExtractor RangeExtractor(OrigDwarf.getRangeSection(),
+  DataExtractor RangeExtractor(OrigDwarf.getRangeSection().Data,
                                OrigDwarf.isLittleEndian(), AddressSize);
   auto InvalidRange = FunctionRanges.end(), CurrRange = InvalidRange;
   DWARFUnit &OrigUnit = Unit.getOrigUnit();
@@ -2884,7 +2884,7 @@ void DwarfLinker::patchRangesForUnit(const CompileUnit &Unit,
   for (const auto &RangeAttribute : Unit.getRangesAttributes()) {
     uint32_t Offset = RangeAttribute.get();
     RangeAttribute.set(Streamer->getRangesSectionSize());
-    RangeList.extract(RangeExtractor, &Offset);
+    RangeList.extract(RangeExtractor, &Offset, OrigDwarf.getRangeSection().Relocs);
     const auto &Entries = RangeList.getEntries();
     if (!Entries.empty()) {
       const DWARFDebugRangeList::RangeListEntry &First = Entries.front();