[llvm] r192781 - llvm-symbolizer: don't always run demangler on global object names

[Alexey Samsonov]

Author: samsonov
Date: Wed Oct 16 04:54:49 2013
New Revision: 192781

URL: http://llvm.org/viewvc/llvm-project?rev=192781&view=rev
Log:
llvm-symbolizer: don't always run demangler on global object names

Modified:
    llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.cpp
    llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.h

Modified: llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.cpp?rev=192781&r1=192780&r2=192781&view=diff
==============================================================================
--- llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.cpp (original)
+++ llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.cpp Wed Oct 16 04:54:49 2013
@@ -196,7 +196,7 @@ std::string LLVMSymbolizer::symbolizeDat
   if (Opts.UseSymbolTable) {
     if (ModuleInfo *Info = getOrCreateModuleInfo(ModuleName)) {
       if (Info->symbolizeData(ModuleOffset, Name, Start, Size) && Opts.Demangle)
-        Name = DemangleName(Name);
+        Name = DemangleGlobalName(Name);
     }
   }
   std::stringstream ss;
@@ -436,5 +436,11 @@ std::string LLVMSymbolizer::DemangleName
 #endif
 }
 
+std::string LLVMSymbolizer::DemangleGlobalName(const std::string &Name) {
+  // We can spoil names of globals with C linkage, so use an heuristic
+  // approach to check if the name should be demangled.
+  return (Name.substr(0, 2) == "_Z") ? DemangleName(Name) : Name;
+}
+
 } // namespace symbolize
 } // namespace llvm

Modified: llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.h?rev=192781&r1=192780&r2=192781&view=diff
==============================================================================
--- llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.h (original)
+++ llvm/trunk/tools/llvm-symbolizer/LLVMSymbolize.h Wed Oct 16 04:54:49 2013
@@ -71,6 +71,7 @@ private:
   ObjectFile *getObjectFileFromBinary(Binary *Bin, const std::string &ArchName);
 
   std::string printDILineInfo(DILineInfo LineInfo) const;
+  static std::string DemangleGlobalName(const std::string &Name);
 
   // Owns all the parsed binaries and object files.
   SmallVector<Binary*, 4> ParsedBinariesAndObjects;