// Copyright 2020 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "src/snapshot/snapshot-utils.h" #include "src/sanitizer/msan.h" #include "third_party/zlib/zlib.h" namespace v8 { namespace internal { uint32_t Checksum(Vector<const byte> payload) { #ifdef MEMORY_SANITIZER // Computing the checksum includes padding bytes for objects like strings. // Mark every object as initialized in the code serializer. MSAN_MEMORY_IS_INITIALIZED(payload.begin(), payload.length()); #endif // MEMORY_SANITIZER // Priming the adler32 call so it can see what CPU features are available. adler32(0, nullptr, 0); return static_cast<uint32_t>(adler32(0, payload.begin(), payload.length())); } V8_EXPORT_PRIVATE uint32_t Checksum(Vector<const byte> payload1, Vector<const byte> payload2) { #ifdef MEMORY_SANITIZER // Computing the checksum includes padding bytes for objects like strings. // Mark every object as initialized in the code serializer. MSAN_MEMORY_IS_INITIALIZED(payload1.begin(), payload1.length()); MSAN_MEMORY_IS_INITIALIZED(payload2.begin(), payload2.length()); #endif // MEMORY_SANITIZER // Priming the adler32 call so it can see what CPU features are available. adler32(0, nullptr, 0); auto sum = adler32(0, payload1.begin(), payload1.length()); sum = adler32(sum, payload2.begin(), payload2.length()); return static_cast<uint32_t>(sum); } } // namespace internal } // namespace v8