Add a temporary hack to FmtElm to truncate 64-bit pointers to 32-bits.

src/string-stream.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 54 matching lines @@
   char* allocate(unsigned bytes) { return space_; }
   char* grow(unsigned* bytes);
  private:
   unsigned size_;
   char* space_;
 };
 
 
 class FmtElm {
  public:
-  FmtElm(int value) : type_(INT) { data_.u_int_ = value; }  // NOLINT
-  explicit FmtElm(double value) : type_(DOUBLE) { data_.u_double_ = value; }  // NOLINT
-  FmtElm(const char* value) : type_(C_STR) { data_.u_c_str_ = value; }  // NOLINT
-  FmtElm(const Vector<const uc16>& value) : type_(LC_STR) { data_.u_lc_str_ = &value; } // NOLINT
-  FmtElm(Object* value) : type_(OBJ) { data_.u_obj_ = value; }  // NOLINT
-  FmtElm(Handle<Object> value) : type_(HANDLE) { data_.u_handle_ = value.location(); }  // NOLINT
-  FmtElm(void* value) : type_(INT) { data_.u_int_ = reinterpret_cast<int>(value); }  // NOLINT
+  FmtElm(int value) : type_(INT) {  // NOLINT
+    data_.u_int_ = value;
+  }
+  explicit FmtElm(double value) : type_(DOUBLE) {
+    data_.u_double_ = value;
+  }
+  FmtElm(const char* value) : type_(C_STR) {  // NOLINT
+    data_.u_c_str_ = value;
+  }
+  FmtElm(const Vector<const uc16>& value) : type_(LC_STR) {  // NOLINT
+    data_.u_lc_str_ = &value;
+  }
+  FmtElm(Object* value) : type_(OBJ) {  // NOLINT
+    data_.u_obj_ = value;
+  }
+  FmtElm(Handle<Object> value) : type_(HANDLE) {  // NOLINT
+    data_.u_handle_ = value.location();
+  }
+  FmtElm(void* value) : type_(INT) {  // NOLINT
+#if V8_HOST_ARCH_64_BIT
+    // TODO(x64): FmtElm needs to treat pointers as pointers, and not as
+    // ints.  This will require adding a pointer type, etc.  For now just
+    // hack it and truncate the pointer.
+    // http://code.google.com/p/v8/issues/detail?id=335
+    data_.u_int_ = 0;
+    UNIMPLEMENTED();
+#else
+    data_.u_int_ = reinterpret_cast<int>(value);
+#endif
+  }
  private:
   friend class StringStream;
   enum Type { INT, DOUBLE, C_STR, LC_STR, OBJ, HANDLE };
   Type type_;
   union {
     int u_int_;
     double u_double_;
     const char* u_c_str_;
     const Vector<const uc16>* u_lc_str_;
     Object* u_obj_;
@@ skipping 73 matching lines @@
   bool full() const { return (capacity_ - length_) == 1; }
   int space() const { return capacity_ - length_; }
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringStream);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STRING_STREAM_H_