Revert "Migrate Binary::checkOffset from error_code to Error, NFC"

This reverts commit 74bd988.
Breaks LLVM::section-headers.test everywhere, see e.g.
http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/29940/steps/test-check-all/logs/FAIL%3A%20LLVM%3A%3Asection-headers.test

Author: nico

llvm/include/llvm/Object/Binary.h

@@ -160,14 +160,14 @@ class Binary {
     return Triple::UnknownObjectFormat;
   }
 
-  static Error checkOffset(MemoryBufferRef M, uintptr_t Addr,
-                           const uint64_t Size) {
+  static std::error_code checkOffset(MemoryBufferRef M, uintptr_t Addr,
+                                     const uint64_t Size) {
     if (Addr + Size < Addr || Addr + Size < Size ||
         Addr + Size > uintptr_t(M.getBufferEnd()) ||
         Addr < uintptr_t(M.getBufferStart())) {
-      return errorCodeToError(object_error::unexpected_eof);
+      return object_error::unexpected_eof;
     }
-    return Error::success();
+    return std::error_code();
   }
 };
 

llvm/include/llvm/Object/ELFObjectFile.h

@@ -744,10 +744,10 @@ ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec) const {
   const Elf_Shdr *EShdr = getSection(Sec);
   if (EShdr->sh_type == ELF::SHT_NOBITS)
     return makeArrayRef((const uint8_t *)base(), 0);
-  if (Error E =
+  if (std::error_code EC =
           checkOffset(getMemoryBufferRef(),
                       (uintptr_t)base() + EShdr->sh_offset, EShdr->sh_size))
-    return std::move(E);
+    return errorCodeToError(EC);
   return makeArrayRef((const uint8_t *)base() + EShdr->sh_offset,
                       EShdr->sh_size);
 }

llvm/lib/Object/COFFObjectFile.cpp

@@ -59,8 +59,8 @@ static std::error_code getObject(const T *&Obj, MemoryBufferRef M,
                                  const void *Ptr,
                                  const uint64_t Size = sizeof(T)) {
   uintptr_t Addr = uintptr_t(Ptr);
-  if (Error E = Binary::checkOffset(M, Addr, Size))
-    return errorToErrorCode(std::move(E));
+  if (std::error_code EC = Binary::checkOffset(M, Addr, Size))
+    return EC;
   Obj = reinterpret_cast<const T *>(Addr);
   return std::error_code();
 }
@@ -374,11 +374,9 @@ getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) {
     // relocations.
     begin++;
   }
-  if (auto E = Binary::checkOffset(M, uintptr_t(begin),
-                                   sizeof(coff_relocation) * NumRelocs)) {
-    consumeError(std::move(E));
+  if (Binary::checkOffset(M, uintptr_t(begin),
+                          sizeof(coff_relocation) * NumRelocs))
     return nullptr;
-  }
   return begin;
 }
 
@@ -557,8 +555,8 @@ std::error_code COFFObjectFile::initImportTablePtr() {
   uintptr_t IntPtr = 0;
   if (std::error_code EC = getRvaPtr(ImportTableRva, IntPtr))
     return EC;
-  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
-    return errorToErrorCode(std::move(E));
+  if (std::error_code EC = checkOffset(Data, IntPtr, DataEntry->Size))
+    return EC;
   ImportDirectory = reinterpret_cast<
       const coff_import_directory_table_entry *>(IntPtr);
   return std::error_code();
@@ -1095,8 +1093,8 @@ Error COFFObjectFile::getSectionContents(const coff_section *Sec,
   // data, as there's nothing that says that is not allowed.
   uintptr_t ConStart = uintptr_t(base()) + Sec->PointerToRawData;
   uint32_t SectionSize = getSectionSize(Sec);
-  if (Error E = checkOffset(Data, ConStart, SectionSize))
-    return E;
+  if (checkOffset(Data, ConStart, SectionSize))
+    return make_error<BinaryError>();
   Res = makeArrayRef(reinterpret_cast<const uint8_t *>(ConStart), SectionSize);
   return Error::success();
 }

llvm/lib/Object/XCOFFObjectFile.cpp

@@ -29,8 +29,8 @@ template <typename T>
 static Expected<const T *> getObject(MemoryBufferRef M, const void *Ptr,
                                      const uint64_t Size = sizeof(T)) {
   uintptr_t Addr = uintptr_t(Ptr);
-  if (Error E = Binary::checkOffset(M, Addr, Size))
-    return std::move(E);
+  if (std::error_code EC = Binary::checkOffset(M, Addr, Size))
+    return errorCodeToError(EC);
   return reinterpret_cast<const T *>(Addr);
 }