[ObjectYAML] Support for DWARF debug_info section

This patch adds support for YAML<->DWARF for debug_info sections.

This re-lands r290147, after fixing the issue that caused bots to fail (thank you UBSan!).

llvm-svn: 290204

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp b/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
index b3f1a52e6b7..e48a6f0981b 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
@@ -661,3 +661,15 @@ Optional<ArrayRef<uint8_t>> DWARFFormValue::getAsBlock() const {
   return makeArrayRef(Value.data, Value.uval);
 }
 
+Optional<uint64_t> DWARFFormValue::getAsCStringOffset() const {
+  if (!isFormClass(FC_String) && Form == DW_FORM_string)
+    return None;
+  return Value.uval;
+}
+
+Optional<uint64_t> DWARFFormValue::getAsReferenceUVal() const {
+  if (!isFormClass(FC_Reference))
+    return None;
+  return Value.uval;
+}
+