diff --git a/llvm/lib/MC/XCOFFObjectWriter.cpp b/llvm/lib/MC/XCOFFObjectWriter.cpp
--- a/llvm/lib/MC/XCOFFObjectWriter.cpp
+++ b/llvm/lib/MC/XCOFFObjectWriter.cpp
@@ -122,6 +122,14 @@
 
   int16_t Index;
 
+  virtual void advanceFileOffset(const uint64_t MaxRawDataSize,
+                                 uint64_t &RawPointer) {
+    FileOffsetToData = RawPointer;
+    RawPointer += Size;
+    if (RawPointer > MaxRawDataSize)
+      report_fatal_error("Section raw data overflowed this object file.");
+  }
+
   // XCOFF has special section numbers for symbols:
   // -2 Specifies N_DEBUG, a special symbolic debugging symbol.
   // -1 Specifies N_ABS, an absolute symbol. The symbol has a value but is not
@@ -189,6 +197,15 @@
   // is for the size the DWARF section occupies including paddings.
   uint32_t MemorySize;
 
+  void advanceFileOffset(const uint64_t MaxRawDataSize,
+                         uint64_t &RawPointer) override {
+    FileOffsetToData = RawPointer;
+    RawPointer += MemorySize;
+
+    assert(RawPointer <= MaxRawDataSize &&
+           "Section raw data overflowed this object file.");
+  }
+
   DwarfSectionEntry(StringRef N, int32_t Flags,
                     std::unique_ptr<XCOFFSection> Sect)
       : SectionEntry(N, Flags | XCOFF::STYP_DWARF), DwarfSect(std::move(Sect)),
@@ -1161,28 +1178,18 @@
     if (Sec->Index == SectionEntry::UninitializedIndex || Sec->IsVirtual)
       continue;
 
-    Sec->FileOffsetToData = RawPointer;
-    RawPointer += Sec->Size;
-    if (RawPointer > MaxRawDataSize)
-      report_fatal_error("Section raw data overflowed this object file.");
+    Sec->advanceFileOffset(MaxRawDataSize, RawPointer);
   }
 
   if (!DwarfSections.empty()) {
     RawPointer += PaddingsBeforeDwarf;
     for (auto &DwarfSection : DwarfSections) {
-      DwarfSection.FileOffsetToData = RawPointer;
-      RawPointer += DwarfSection.MemorySize;
-      if (RawPointer > MaxRawDataSize)
-        report_fatal_error("Section raw data overflowed this object file.");
+      DwarfSection.advanceFileOffset(MaxRawDataSize, RawPointer);
     }
   }
 
   if (hasExceptionSection()) {
-    ExceptionSection.FileOffsetToData = RawPointer;
-    RawPointer += ExceptionSection.Size;
-
-    assert(RawPointer <= MaxRawDataSize &&
-           "Section raw data overflowed this object file.");
+    ExceptionSection.advanceFileOffset(MaxRawDataSize, RawPointer);
   }
 
   for (auto *Sec : Sections) {