diff --git a/llvm/include/llvm/DebugInfo/DWARF/DWARFDataExtractor.h b/llvm/include/llvm/DebugInfo/DWARF/DWARFDataExtractor.h
--- a/llvm/include/llvm/DebugInfo/DWARF/DWARFDataExtractor.h
+++ b/llvm/include/llvm/DebugInfo/DWARF/DWARFDataExtractor.h
@@ -39,6 +39,12 @@
             StringRef(reinterpret_cast<const char *>(Data.data()), Data.size()),
             IsLittleEndian, AddressSize) {}
 
+  /// Truncating constructor
+  DWARFDataExtractor(const DWARFDataExtractor &Other, size_t Length)
+      : DataExtractor(Other.getData().substr(0, Length), Other.isLittleEndian(),
+                      Other.getAddressSize()),
+        Obj(Other.Obj), Section(Other.Section) {}
+
   /// Extracts the DWARF "initial length" field, which can either be a 32-bit
   /// value smaller than 0xfffffff0, or the value 0xffffffff followed by a
   /// 64-bit length. Returns the actual length, and the DWARF format which is
diff --git a/llvm/unittests/DebugInfo/DWARF/DWARFDataExtractorTest.cpp b/llvm/unittests/DebugInfo/DWARF/DWARFDataExtractorTest.cpp
--- a/llvm/unittests/DebugInfo/DWARF/DWARFDataExtractorTest.cpp
+++ b/llvm/unittests/DebugInfo/DWARF/DWARFDataExtractorTest.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
+#include "llvm/DebugInfo/DWARF/DWARFContext.h"
+#include "llvm/ObjectYAML/yaml2obj.h"
 #include "llvm/Testing/Support/Error.h"
 #include "gtest/gtest.h"
 
@@ -95,4 +97,57 @@
             std::make_tuple(0x0001020304050607, dwarf::DWARF64, 12));
 }
 
+TEST(DWARFDataExtractorTest, Truncation) {
+  StringRef Yaml = R"(
+!ELF
+FileHeader:
+  Class:    ELFCLASS32
+  Data:     ELFDATA2LSB
+  Type:     ET_REL
+  Machine:  EM_386
+Sections:
+  - Name:     .text
+    Type:     SHT_PROGBITS
+    Size:     0x80
+  - Name:     .debug_line
+    Type:     SHT_PROGBITS
+    Content:  '616263640000000065666768'
+  - Name:     .rel.debug_line
+    Type:     SHT_REL
+    Info:     .debug_line
+    Relocations:
+      - Offset:   4
+        Symbol:   f
+        Type:     R_386_32
+Symbols:
+  - Name:     f
+    Type:     STT_SECTION
+    Section:  .text
+    Value:    0x42
+)";
+  SmallString<0> Storage;
+  std::unique_ptr<object::ObjectFile> Obj =
+      yaml::yaml2ObjectFile(Storage, Yaml, [](Twine Err) { errs() << Err; });
+  ASSERT_TRUE(Obj);
+  std::unique_ptr<DWARFContext> Ctx = DWARFContext::create(*Obj);
+  const DWARFObject &DObj = Ctx->getDWARFObj();
+  ASSERT_EQ(12u, DObj.getLineSection().Data.size());
+
+  DWARFDataExtractor Data(DObj, DObj.getLineSection(), Obj->isLittleEndian(),
+                          Obj->getBytesInAddress());
+  DataExtractor::Cursor C(0);
+  EXPECT_EQ(0x64636261u, Data.getRelocatedAddress(C));
+  EXPECT_EQ(0x42u, Data.getRelocatedAddress(C));
+  EXPECT_EQ(0x68676665u, Data.getRelocatedAddress(C));
+  EXPECT_THAT_ERROR(C.takeError(), Succeeded());
+
+  C = DataExtractor::Cursor{0};
+  DWARFDataExtractor Truncated(Data, 8);
+  EXPECT_EQ(0x64636261u, Truncated.getRelocatedAddress(C));
+  EXPECT_EQ(0x42u, Truncated.getRelocatedAddress(C));
+  EXPECT_EQ(0x0u, Truncated.getRelocatedAddress(C));
+  EXPECT_THAT_ERROR(C.takeError(),
+                    FailedWithMessage("unexpected end of data at offset 0x8"));
+}
+
 } // namespace