| /* |
| * 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 |