Bitcoin Core  22.99.0
P2P Digital Currency
random.cpp
Go to the documentation of this file.
1 // Copyright (c) 2020 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <random.h>
7 #include <test/fuzz/fuzz.h>
8 #include <test/fuzz/util.h>
9 
10 #include <algorithm>
11 #include <cstdint>
12 #include <string>
13 #include <vector>
14 
15 FUZZ_TARGET(random)
16 {
17  FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
18  FastRandomContext fast_random_context{ConsumeUInt256(fuzzed_data_provider)};
19  (void)fast_random_context.rand64();
20  (void)fast_random_context.randbits(fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 64));
21  (void)fast_random_context.randrange(fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(FastRandomContext::min() + 1, FastRandomContext::max()));
22  (void)fast_random_context.randbytes(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 1024));
23  (void)fast_random_context.rand32();
24  (void)fast_random_context.rand256();
25  (void)fast_random_context.randbool();
26  (void)fast_random_context();
27 
28  std::vector<int64_t> integrals = ConsumeRandomLengthIntegralVector<int64_t>(fuzzed_data_provider);
29  Shuffle(integrals.begin(), integrals.end(), fast_random_context);
30  std::shuffle(integrals.begin(), integrals.end(), fast_random_context);
31 }
ConsumeUInt256
uint256 ConsumeUInt256(FuzzedDataProvider &fuzzed_data_provider) noexcept
Definition: util.h:153
FUZZ_TARGET
FUZZ_TARGET(random)
Definition: random.cpp:15
util.h
random.h
FuzzedDataProvider.h
Shuffle
void Shuffle(I first, I last, R &&rng)
More efficient than using std::shuffle on a FastRandomContext.
Definition: random.h:231
FastRandomContext::max
static constexpr uint64_t max()
Definition: random.h:216
fuzz.h
FuzzedDataProvider
Definition: FuzzedDataProvider.h:31
FastRandomContext::min
static constexpr uint64_t min()
Definition: random.h:215
FuzzedDataProvider::ConsumeIntegralInRange
T ConsumeIntegralInRange(T min, T max)
Definition: FuzzedDataProvider.h:204
FastRandomContext
Fast randomness source.
Definition: random.h:119