text: /*
   * Copyright 2016 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef SkMSAN_DEFINED
  #define SkMSAN_DEFINED
  
  #include "include/core/SkTypes.h"
  
  // Typically declared in LLVM's msan_interface.h.  Easier for us to just re-declare.
  extern "C" {
      void __msan_check_mem_is_initialized(const volatile void*, size_t);
      void __msan_unpoison                (const volatile void*, size_t);
  }
  
  // Code that requires initialized inputs can call this to make it clear that
  // the blame for use of uninitialized data belongs further up the call stack.
  static inline void sk_msan_assert_initialized(const void* begin, const void* end) {
  #if defined(__has_feature)
      #if __has_feature(memory_sanitizer)
          __msan_check_mem_is_initialized(begin, (const char*)end - (const char*)begin);
      #endif
  #endif
  }
  
  // Lie to MSAN that this range of memory is initialized.
  // This can hide serious problems if overused.  Every use of this should refer to a bug.
  static inline void sk_msan_mark_initialized(const void* begin, const void* end, const char* skbug) {
      SkASSERT(skbug && 0 != strcmp(skbug, ""));
  #if defined(__has_feature)
      #if __has_feature(memory_sanitizer)
          __msan_unpoison(begin, (const char*)end - (const char*)begin);
      #endif
  #endif
  }
  
  #endif//SkMSAN_DEFINED
  