[MC] Report fatal error for DWARF types for non-ELF object files

Getting the DWARF types section is only implemented for ELF object
files. We already disabled emitting debug types in clang (r337717), but
now we also report an fatal error (rather than crashing) when trying to
obtain this section in MC. Additionally we ignore the generate debug
types flag for unsupported target triples.

See PR38190 for more information.

Differential revision: https://reviews.llvm.org/D50057

llvm-svn: 338527

1 files changed, 12 insertions, 2 deletions

diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index 29d34a8c1e3..d42231264da 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -950,8 +950,18 @@ void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
 }
 
 MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
-  return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
-                            0, utostr(Hash));
+  switch (TT.getObjectFormat()) {
+  case Triple::ELF:
+    return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
+                              0, utostr(Hash));
+  case Triple::MachO:
+  case Triple::COFF:
+  case Triple::Wasm:
+  case Triple::UnknownObjectFormat:
+    report_fatal_error("Cannot get DWARF types section for this object file "
+                       "format: not implemented.");
+    break;
+  }
 }
 
 MCSection *