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/*
* 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 "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
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