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Current Path: /usr/src/contrib/llvm-project/compiler-rt/lib/gwp_asan

usr / src / contrib / llvm-project / compiler-rt / lib / gwp_asan /

📁 ..
📄 common.cpp(3.33 KB)
📄 common.h(4.45 KB)
📄 crash_handler.cpp(4.32 KB)
📄 crash_handler.h(6.2 KB)
📄 definitions.h(776 B)
📄 guarded_pool_allocator.cpp(9.62 KB)
📄 guarded_pool_allocator.h(9.41 KB)
📄 mutex.h(1.24 KB)
📁 optional
📄 options.h(2.36 KB)
📄 options.inc(2.73 KB)
📁 platform_specific
📄 random.cpp(1022 B)
📄 random.h(746 B)
📄 stack_trace_compressor.cpp(3.17 KB)
📄 stack_trace_compressor.h(1.52 KB)
📄 utilities.h(978 B)

Editing: random.cpp

//===-- random.cpp ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "gwp_asan/random.h"
#include "gwp_asan/common.h"

#include <time.h>

// Initialised to a magic constant so that an uninitialised GWP-ASan won't
// regenerate its sample counter for as long as possible. The xorshift32()
// algorithm used below results in getRandomUnsigned32(0xff82eb50) ==
// 0xfffffea4.
GWP_ASAN_TLS_INITIAL_EXEC uint32_t RandomState = 0xff82eb50;

namespace gwp_asan {
void initPRNG() {
  RandomState = time(nullptr) + getThreadID();
}

uint32_t getRandomUnsigned32() {
  RandomState ^= RandomState << 13;
  RandomState ^= RandomState >> 17;
  RandomState ^= RandomState << 5;
  return RandomState;
}
} // namespace gwp_asan

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Editing: random.cpp

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