Index: test/DebugInfo/llvm-symbolizer.test
===================================================================
--- test/DebugInfo/llvm-symbolizer.test
+++ test/DebugInfo/llvm-symbolizer.test
@@ -60,9 +60,11 @@
 
 RUN: echo "0x400559" > %t.input4
 RUN: echo "0x400436" >> %t.input4
+RUN: echo "0x400510" >> %t.input4
 RUN: llvm-symbolizer --obj %p/Inputs/dwarfdump-test.elf-x86-64 < %t.input4 \
 RUN:   | FileCheck %s --check-prefix=BINARY
 
 BINARY:       main
 BINARY-NEXT: /tmp/dbginfo{{[/\\]}}dwarfdump-test.cc:16
 BINARY:      _start
+BINARY:      f
Index: tools/llvm-symbolizer/LLVMSymbolize.cpp
===================================================================
--- tools/llvm-symbolizer/LLVMSymbolize.cpp
+++ tools/llvm-symbolizer/LLVMSymbolize.cpp
@@ -423,6 +423,8 @@
 
 std::string LLVMSymbolizer::DemangleName(const std::string &Name) {
 #if !defined(_MSC_VER)
+  if (Name.substr(0, 2) != "_Z")
+    return Name;
   int status = 0;
   char *DemangledName = __cxa_demangle(Name.c_str(), 0, 0, &status);
   if (status != 0)