Oilpan: GC_TRACING: Improve object path dump

Source/wtf/Assertions.h

 /*
  * Copyright (C) 2003, 2006, 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 102 matching lines @@
 WTF_EXPORT void WTFReportBacktrace(int framesToShow = 31);
 WTF_EXPORT void WTFPrintBacktrace(void** stack, int size);
 
 typedef void (*WTFCrashHookFunction)();
 WTF_EXPORT void WTFSetCrashHook(WTFCrashHookFunction);
 WTF_EXPORT void WTFInvokeCrashHook();
 WTF_EXPORT void WTFInstallReportBacktraceOnCrashHook();
 
 #ifdef __cplusplus
 }
+
+namespace WTF {
+
+class WTF_EXPORT FrameToNameScope {
+public:
+    explicit FrameToNameScope(void*);
+    ~FrameToNameScope();
+    const char* nullableName() { return m_name; }
+
+private:
+    const char* m_name;
+    char* m_cxaDemangled;
+};
+
+} // namespace WTF
+
+using WTF::FrameToNameScope;
 #endif
 
 /* IMMEDIATE_CRASH() - Like CRASH() below but crashes in the fastest, simplest possible way with no attempt at logging. */
 #ifndef IMMEDIATE_CRASH
 #if COMPILER(GCC)
 #define IMMEDIATE_CRASH() __builtin_trap()
 #else
 #define IMMEDIATE_CRASH() ((void(*)())0)()
 #endif
 #endif
@@ skipping 267 matching lines @@
 } \
 inline const thisType& to##thisType(const argumentType& argumentName) \
 { \
     ASSERT_WITH_SECURITY_IMPLICATION(referencePredicate); \
     return static_cast<const thisType&>(argumentName); \
 } \
 void to##thisType(const thisType*); \
 void to##thisType(const thisType&)
 
 #endif /* WTF_Assertions_h */