1 //===-- random.cpp ----------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "gwp_asan/random.h" 10 #include "gwp_asan/guarded_pool_allocator.h" 11 12 #include <time.h> 13 14 namespace gwp_asan { getRandomUnsigned32()15uint32_t getRandomUnsigned32() { 16 thread_local uint32_t RandomState = 17 time(nullptr) + GuardedPoolAllocator::getThreadID(); 18 RandomState ^= RandomState << 13; 19 RandomState ^= RandomState >> 17; 20 RandomState ^= RandomState << 5; 21 return RandomState; 22 } 23 } // namespace gwp_asan 24