[libunwind] Add more information to eh_frame_hdr version error

This makes it easier to find the offending ELF file.

Reviewed By: #libunwind, MaskRay

Differential Revision: https://reviews.llvm.org/D126841

libunwind/src/EHHeaderParser.hpp

@@ -57,7 +57,8 @@ bool EHHeaderParser<A>::decodeEHHdr(A &addressSpace, pint_t ehHdrStart,
   pint_t p = ehHdrStart;
   uint8_t version = addressSpace.get8(p++);
   if (version != 1) {
-    _LIBUNWIND_LOG0("Unsupported .eh_frame_hdr version");
+    _LIBUNWIND_LOG("unsupported .eh_frame_hdr version: %" PRIu8 " at %" PRIx64,
+                   version, static_cast<uint64_t>(ehHdrStart));
     return false;
   }