Add name demangling for BACKTRACE_LOOKUP_METHOD_ATOS.

stepmania/src/archutils/Unix/CrashHandlerChild.cpp

@@ -150,6 +150,8 @@ void BacktraceNames::FromString( CString s )
     }
 }
 #elif defined(BACKTRACE_LOOKUP_METHOD_ATOS)
+#include <cxxabi.h>
+
 void BacktraceNames::FromAddr( void *p )
 {
     int fds[2];
@@ -242,6 +244,36 @@ void BacktraceNames::FromAddr( void *p )
      */
     if (Symbol[0] == '_')
         Symbol = Symbol.substr(1);
+    
+    /* demangle the name using __cxa_demangle() if needed */
+    if (Symbol.substr(0, 2) == "_Z")
+    {
+        const char *name;
+        int status = 0;
+        name = abi::__cxa_demangle(Symbol, 0, 0, &status);
+        if (name)
+            Symbol = name;
+        else
+        {
+            switch (status)
+            {
+                case 0:
+                    fprintf(stderr, "WTF? It returned success...\n");
+                    break;
+                case -1:
+                    fprintf(stderr, "Memory allocation failure.\n");
+                    break;
+                case -2:
+                    fprintf(stderr, "Invalid mangled name: %s.\n", Symbol.c_str());
+                    break;
+                case -3:
+                    fprintf(stderr, "Invalid arguments.\n");
+                    break;
+                default:
+                    fprintf(stderr, "No idea what happened here.");
+            }
+        }
+    }
     /* eg, the full line:
      * __Z1Ci (in a.out) (asmtest.cc:33)
      * _main (in a.out) (asmtest.cc:52)