Add sk_careful_memcpy to catch undefined behavior in memcpy.

include/core/SkTDArray.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkTDArray_DEFINED
@@ skipping 27 matching lines @@
     ~SkTDArray() {
         sk_free(fArray);
     }
 
     SkTDArray<T>& operator=(const SkTDArray<T>& src) {
         if (this != &src) {
             if (src.fCount > fReserve) {
                 SkTDArray<T> tmp(src.fArray, src.fCount);
                 this->swap(tmp);
             } else {
-                memcpy(fArray, src.fArray, sizeof(T) * src.fCount);
+                sk_careful_memcpy(fArray, src.fArray, sizeof(T) * src.fCount);
                 fCount = src.fCount;
             }
         }
         return *this;
     }
 
     friend bool operator==(const SkTDArray<T>& a, const SkTDArray<T>& b) {
         return  a.fCount == b.fCount &&
                 (a.fCount == 0 ||
                  !memcmp(a.fArray, b.fArray, a.fCount * sizeof(T)));
@@ skipping 296 matching lines @@
      */
     void resizeStorageToAtLeast(int count) {
         SkASSERT(count > fReserve);
         fReserve = count + 4;
         fReserve += fReserve / 4;
         fArray = (T*)sk_realloc_throw(fArray, fReserve * sizeof(T));
     }
 };
 
 #endif