[dwarfdump] Handle relocations in Dwarf accelerator tables

ELF targets (and maybe COFF) use relocations when referring
to strings in the .debug_str section. Handle that in the
accelerator table dumper. This commit restores the
test/DebugInfo/cross-cu-inlining.ll test to its expected
platform independant form, validating that the fix works
(this test failed on linux boxes).

llvm-svn: 222029

1 files changed, 7 insertions, 1 deletions

diff --git a/llvm/lib/DebugInfo/DWARFAcceleratorTable.cpp b/llvm/lib/DebugInfo/DWARFAcceleratorTable.cpp
index 4b844e999eb..50283b40ca8 100644
--- a/llvm/lib/DebugInfo/DWARFAcceleratorTable.cpp
+++ b/llvm/lib/DebugInfo/DWARFAcceleratorTable.cpp
@@ -92,7 +92,13 @@ void DWARFAcceleratorTable::dump(raw_ostream &OS) {
         OS << "    Invalid section offset\n";
         continue;
       }
-      while (unsigned StringOffset = AccelSection.getU32(&DataOffset)) {
+      while (AccelSection.isValidOffsetForDataOfSize(DataOffset, 4)) {
+        unsigned StringOffset = AccelSection.getU32(&DataOffset);
+        RelocAddrMap::const_iterator Reloc = Relocs.find(DataOffset-4);
+        if (Reloc != Relocs.end())
+          StringOffset += Reloc->second.second;
+        if (!StringOffset)
+          break;
         OS << format("    Name: %08x \"%s\"\n", StringOffset,
                      StringSection.getCStr(&StringOffset));
         unsigned NumData = AccelSection.getU32(&DataOffset);