llvm-symbolizer: make mangled name heuristic apply to all symbols

PR: http://llvm.org/pr18431
Review: http://llvm-reviews.chandlerc.com/D2552


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199404 91177308-0d34-0410-b5e6-96231b3b80d8

test/DebugInfo/Inputs/llvm-symbolizer-test.c

@@ -0,0 +1,18 @@
+int f(int a, int b) {
+  return a + b;
+}
+
+int g(int a) {
+  return a + 1;
+}
+
+
+int main() {
+  return f(2, g(2));
+}
+
+// Built with Clang 3.3:
+// $ mkdir -p /tmp/dbginfo
+// $ cp llvm-symbolizer-test.c /tmp/dbginfo
+// $ cd /tmp/dbginfo
+// $ clang -g llvm-symbolizer-test.c -o <output>

test/DebugInfo/llvm-symbolizer.test

@@ -66,3 +66,14 @@ RUN:   | FileCheck %s --check-prefix=BINARY
 BINARY:       main
 BINARY-NEXT: /tmp/dbginfo{{[/\\]}}dwarfdump-test.cc:16
 BINARY:      _start
+
+RUN: echo "0x400720" > %t.input5
+RUN: echo "0x4004a0" >> %t.input5
+RUN: echo "0x4006f0" >> %t.input5
+RUN: llvm-symbolizer --obj %p/Inputs/llvm-symbolizer-test.elf-x86-64 < %t.input5 \
+RUN:   | FileCheck %s --check-prefix=BINARY_C
+
+BINARY_C:       main
+BINARY_C-NEXT: /tmp/dbginfo{{[/\\]}}llvm-symbolizer-test.c:10
+BINARY_C:      _start
+BINARY_C:      {{g$}}

tools/llvm-symbolizer/LLVMSymbolize.cpp

@@ -195,7 +195,7 @@ std::string LLVMSymbolizer::symbolizeData(const std::string &ModuleName,
   if (Opts.UseSymbolTable) {
     if (ModuleInfo *Info = getOrCreateModuleInfo(ModuleName)) {
       if (Info->symbolizeData(ModuleOffset, Name, Start, Size) && Opts.Demangle)
-        Name = DemangleGlobalName(Name);
+        Name = DemangleName(Name);
     }
   }
   std::stringstream ss;
@@ -424,6 +424,10 @@ extern "C" char *__cxa_demangle(const char *mangled_name, char *output_buffer,
 
 std::string LLVMSymbolizer::DemangleName(const std::string &Name) {
 #if !defined(_MSC_VER)
+  // We can spoil names of symbols with C linkage, so use an heuristic
+  // approach to check if the name should be demangled.
+  if (Name.substr(0, 2) != "_Z")
+    return Name;
   int status = 0;
   char *DemangledName = __cxa_demangle(Name.c_str(), 0, 0, &status);
   if (status != 0)
@@ -436,11 +440,5 @@ std::string LLVMSymbolizer::DemangleName(const std::string &Name) {
 #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

tools/llvm-symbolizer/LLVMSymbolize.h

@@ -71,7 +71,6 @@ 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;