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Merge #18353: tests: Add fuzzing harnesses for classes CBlockHeader, CFeeRate and various functions

Browse Source 
44abf417eb tests: Add fuzzing harness for various functions taking std::string as input (practicalswift)
d69145acb7 tests: Add fuzzing harness for MultiplicationOverflow(...) (practicalswift)
7726f3bc46 tests: Add fuzzing harness for CFeeRate (practicalswift)
0579a27630 tests: Add fuzzing harness for CBlockHeader (practicalswift)
cb4eec13c0 tests: Add fuzzing harness for count_seconds(...) (practicalswift)

Pull request description:

  Add fuzzing harnesses for classes `CBlockHeader`, `CFeeRate` and various functions.

  To test this PR:

  ```
  $ make distclean
  $ ./autogen.sh
  $ CC=clang CXX=clang++ ./configure --enable-fuzz \
        --with-sanitizers=address,fuzzer,undefined
  $ make
  $ src/test/fuzz/block_header
  ^c (ctrl-c)
  $ src/test/fuzz/fee_rate
  ^c (ctrl-c)
  $ src/test/fuzz/integer
  ^c (ctrl-c)
  $ src/test/fuzz/multiplication_overflow
  ^c (ctrl-c)
  $ src/test/fuzz/string
  ^c (ctrl-c)
  ```

ACKs for top commit:
  MarcoFalke:
    ACK 44abf417eb 🏉

Tree-SHA512: 2b382a7bc8efdcc6dd8b79f1637f194ecdca3e522c6618ae6c4b0bf6f86d2e79b1bb1c7160522083600616d1ed509b2f577f3a512ea3a7825a0a3794578d9d90
This commit is contained in:
MarcoFalke 2020-03-17 13:07:36 -04:00
commit d2d0a04a66
No known key found for this signature in database
GPG Key ID: CE2B75697E69A548
7 changed files with 289 additions and 6 deletions
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40
src/Makefile.test.include
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@ -14,6 +14,7 @@ FUZZ_TARGETS = \
test/fuzz/block_deserialize \
test/fuzz/block_file_info_deserialize \
test/fuzz/block_filter_deserialize \
test/fuzz/block_header \
test/fuzz/block_header_and_short_txids_deserialize \
test/fuzz/blockheader_deserialize \
test/fuzz/blocklocator_deserialize \
@ -28,6 +29,7 @@ FUZZ_TARGETS = \
test/fuzz/descriptor_parse \
test/fuzz/diskblockindex_deserialize \
test/fuzz/eval_script \
test/fuzz/fee_rate \
test/fuzz/fee_rate_deserialize \
test/fuzz/flat_file_pos_deserialize \
test/fuzz/float \
@ -40,6 +42,7 @@ FUZZ_TARGETS = \
test/fuzz/locale \
test/fuzz/merkle_block_deserialize \
test/fuzz/messageheader_deserialize \
test/fuzz/multiplication_overflow \
test/fuzz/netaddr_deserialize \
test/fuzz/netaddress \
test/fuzz/out_point_deserialize \
@ -90,6 +93,7 @@ FUZZ_TARGETS = \
test/fuzz/service_deserialize \
test/fuzz/snapshotmetadata_deserialize \
test/fuzz/spanparsing \
test/fuzz/string \
test/fuzz/strprintf \
test/fuzz/sub_net_deserialize \
test/fuzz/transaction \
@ -343,6 +347,12 @@ test_fuzz_block_filter_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_block_filter_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_block_filter_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
test_fuzz_block_header_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_block_header_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_block_header_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_block_header_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_block_header_SOURCES = $(FUZZ_SUITE) test/fuzz/block_header.cpp
test_fuzz_block_header_and_short_txids_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DBLOCK_HEADER_AND_SHORT_TXIDS_DESERIALIZE=1
test_fuzz_block_header_and_short_txids_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_block_header_and_short_txids_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
@ -427,6 +437,12 @@ test_fuzz_eval_script_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_eval_script_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_eval_script_SOURCES = $(FUZZ_SUITE) test/fuzz/eval_script.cpp
test_fuzz_fee_rate_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_fee_rate_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_fee_rate_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_fee_rate_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_fee_rate_SOURCES = $(FUZZ_SUITE) test/fuzz/fee_rate.cpp
test_fuzz_fee_rate_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DFEE_RATE_DESERIALIZE=1
test_fuzz_fee_rate_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_fee_rate_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
@ -499,6 +515,12 @@ test_fuzz_messageheader_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_messageheader_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_messageheader_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
test_fuzz_multiplication_overflow_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_multiplication_overflow_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_multiplication_overflow_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_multiplication_overflow_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_multiplication_overflow_SOURCES = $(FUZZ_SUITE) test/fuzz/multiplication_overflow.cpp
test_fuzz_netaddr_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DNETADDR_DESERIALIZE=1
test_fuzz_netaddr_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_netaddr_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
@ -787,12 +809,24 @@ test_fuzz_service_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_service_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_service_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
test_fuzz_snapshotmetadata_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DSNAPSHOTMETADATA_DESERIALIZE=1
test_fuzz_snapshotmetadata_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_snapshotmetadata_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_snapshotmetadata_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_snapshotmetadata_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
test_fuzz_spanparsing_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_spanparsing_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_spanparsing_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_spanparsing_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_spanparsing_SOURCES = $(FUZZ_SUITE) test/fuzz/spanparsing.cpp
test_fuzz_string_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_string_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_string_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_string_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_string_SOURCES = $(FUZZ_SUITE) test/fuzz/string.cpp
test_fuzz_strprintf_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_strprintf_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_strprintf_LDADD = $(FUZZ_SUITE_LD_COMMON)
@ -805,12 +839,6 @@ test_fuzz_sub_net_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_sub_net_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_sub_net_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
test_fuzz_snapshotmetadata_deserialize_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) -DSNAPSHOTMETADATA_DESERIALIZE=1
test_fuzz_snapshotmetadata_deserialize_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_snapshotmetadata_deserialize_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_snapshotmetadata_deserialize_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_snapshotmetadata_deserialize_SOURCES = $(FUZZ_SUITE) test/fuzz/deserialize.cpp
test_fuzz_transaction_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_transaction_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_transaction_LDADD = $(FUZZ_SUITE_LD_COMMON)

41
src/test/fuzz/block_header.cpp Normal file
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@ -0,0 +1,41 @@
// Copyright (c) 2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <optional.h>
#include <primitives/block.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <uint256.h>
#include <cassert>
#include <cstdint>
#include <string>
#include <vector>
void test_one_input(const std::vector<uint8_t>& buffer)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
const Optional<CBlockHeader> block_header = ConsumeDeserializable<CBlockHeader>(fuzzed_data_provider);
if (!block_header) {
return;
}
{
const uint256 hash = block_header->GetHash();
static const uint256 u256_max(uint256S("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"));
assert(hash != u256_max);
assert(block_header->GetBlockTime() == block_header->nTime);
assert(block_header->IsNull() == (block_header->nBits == 0));
}
{
CBlockHeader mut_block_header = *block_header;
mut_block_header.SetNull();
assert(mut_block_header.IsNull());
CBlock block{*block_header};
assert(block.GetBlockHeader().GetHash() == block_header->GetHash());
(void)block.ToString();
block.SetNull();
assert(block.GetBlockHeader().GetHash() == mut_block_header.GetHash());
}
}

40
src/test/fuzz/fee_rate.cpp Normal file
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@ -0,0 +1,40 @@
// Copyright (c) 2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <amount.h>
#include <policy/feerate.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <cstdint>
#include <limits>
#include <string>
#include <vector>
void test_one_input(const std::vector<uint8_t>& buffer)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
const CAmount satoshis_per_k = ConsumeMoney(fuzzed_data_provider);
const CFeeRate fee_rate{satoshis_per_k};
(void)fee_rate.GetFeePerK();
const size_t bytes = fuzzed_data_provider.ConsumeIntegral<size_t>();
if (!MultiplicationOverflow(static_cast<int64_t>(bytes), satoshis_per_k) && bytes <= static_cast<uint64_t>(std::numeric_limits<int64_t>::max())) {
(void)fee_rate.GetFee(bytes);
}
(void)fee_rate.ToString();
const CAmount another_satoshis_per_k = ConsumeMoney(fuzzed_data_provider);
CFeeRate larger_fee_rate{another_satoshis_per_k};
larger_fee_rate += fee_rate;
if (satoshis_per_k != 0 && another_satoshis_per_k != 0) {
assert(fee_rate < larger_fee_rate);
assert(!(fee_rate > larger_fee_rate));
assert(!(fee_rate == larger_fee_rate));
assert(fee_rate <= larger_fee_rate);
assert(!(fee_rate >= larger_fee_rate));
assert(fee_rate != larger_fee_rate);
}
}

4
src/test/fuzz/integer.cpp
View File

@ -23,6 +23,7 @@
#include <streams.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <time.h>
#include <uint256.h>
#include <util/moneystr.h>
#include <util/strencodings.h>
@ -31,6 +32,7 @@
#include <version.h>
#include <cassert>
#include <chrono>
#include <limits>
#include <vector>
@ -124,6 +126,8 @@ void test_one_input(const std::vector<uint8_t>& buffer)
assert(parsed_money == i64);
}
}
const std::chrono::seconds seconds{i64};
assert(count_seconds(seconds) == i64);
const arith_uint256 au256 = UintToArith256(u256);
assert(ArithToUint256(au256) == u256);

42
src/test/fuzz/multiplication_overflow.cpp Normal file
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@ -0,0 +1,42 @@
// Copyright (c) 2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <cstdint>
#include <string>
#include <vector>
namespace {
template <typename T>
void TestMultiplicationOverflow(FuzzedDataProvider& fuzzed_data_provider)
{
const T i = fuzzed_data_provider.ConsumeIntegral<T>();
const T j = fuzzed_data_provider.ConsumeIntegral<T>();
const bool is_multiplication_overflow_custom = MultiplicationOverflow(i, j);
T result_builtin;
const bool is_multiplication_overflow_builtin = __builtin_mul_overflow(i, j, &result_builtin);
assert(is_multiplication_overflow_custom == is_multiplication_overflow_builtin);
if (!is_multiplication_overflow_custom) {
assert(i * j == result_builtin);
}
}
} // namespace
void test_one_input(const std::vector<uint8_t>& buffer)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
TestMultiplicationOverflow<int64_t>(fuzzed_data_provider);
TestMultiplicationOverflow<uint64_t>(fuzzed_data_provider);
TestMultiplicationOverflow<int32_t>(fuzzed_data_provider);
TestMultiplicationOverflow<uint32_t>(fuzzed_data_provider);
TestMultiplicationOverflow<int16_t>(fuzzed_data_provider);
TestMultiplicationOverflow<uint16_t>(fuzzed_data_provider);
TestMultiplicationOverflow<char>(fuzzed_data_provider);
TestMultiplicationOverflow<unsigned char>(fuzzed_data_provider);
TestMultiplicationOverflow<signed char>(fuzzed_data_provider);
TestMultiplicationOverflow<bool>(fuzzed_data_provider);
}

89
src/test/fuzz/string.cpp Normal file
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@ -0,0 +1,89 @@
// Copyright (c) 2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <blockfilter.h>
#include <clientversion.h>
#include <logging.h>
#include <netbase.h>
#include <outputtype.h>
#include <rpc/client.h>
#include <rpc/request.h>
#include <rpc/server.h>
#include <rpc/util.h>
#include <script/descriptor.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <util/error.h>
#include <util/fees.h>
#include <util/message.h>
#include <util/settings.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <util/system.h>
#include <util/translation.h>
#include <util/url.h>
#include <cstdint>
#include <string>
#include <vector>
void test_one_input(const std::vector<uint8_t>& buffer)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
const std::string random_string_1 = fuzzed_data_provider.ConsumeRandomLengthString(32);
const std::string random_string_2 = fuzzed_data_provider.ConsumeRandomLengthString(32);
const std::vector<std::string> random_string_vector = ConsumeRandomLengthStringVector(fuzzed_data_provider);
(void)AmountErrMsg(random_string_1, random_string_2);
(void)AmountHighWarn(random_string_1);
BlockFilterType block_filter_type;
(void)BlockFilterTypeByName(random_string_1, block_filter_type);
(void)Capitalize(random_string_1);
(void)CopyrightHolders(random_string_1);
FeeEstimateMode fee_estimate_mode;
(void)FeeModeFromString(random_string_1, fee_estimate_mode);
(void)FormatParagraph(random_string_1, fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 1000), fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 1000));
(void)FormatSubVersion(random_string_1, fuzzed_data_provider.ConsumeIntegral<int>(), random_string_vector);
(void)GetDescriptorChecksum(random_string_1);
(void)HelpExampleCli(random_string_1, random_string_2);
(void)HelpExampleRpc(random_string_1, random_string_2);
(void)HelpMessageGroup(random_string_1);
(void)HelpMessageOpt(random_string_1, random_string_2);
(void)IsDeprecatedRPCEnabled(random_string_1);
(void)Join(random_string_vector, random_string_1);
(void)JSONRPCError(fuzzed_data_provider.ConsumeIntegral<int>(), random_string_1);
const util::Settings settings;
(void)OnlyHasDefaultSectionSetting(settings, random_string_1, random_string_2);
(void)ParseNetwork(random_string_1);
try {
(void)ParseNonRFCJSONValue(random_string_1);
} catch (const std::runtime_error&) {
}
OutputType output_type;
(void)ParseOutputType(random_string_1, output_type);
(void)ResolveErrMsg(random_string_1, random_string_2);
try {
(void)RPCConvertNamedValues(random_string_1, random_string_vector);
} catch (const std::runtime_error&) {
}
try {
(void)RPCConvertValues(random_string_1, random_string_vector);
} catch (const std::runtime_error&) {
}
(void)SanitizeString(random_string_1);
(void)SanitizeString(random_string_1, fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 3));
(void)ShellEscape(random_string_1);
int port_out;
std::string host_out;
SplitHostPort(random_string_1, port_out, host_out);
(void)TimingResistantEqual(random_string_1, random_string_2);
(void)ToLower(random_string_1);
(void)ToUpper(random_string_1);
(void)TrimString(random_string_1);
(void)TrimString(random_string_1, random_string_2);
(void)urlDecode(random_string_1);
(void)ValidAsCString(random_string_1);
(void)_(random_string_1.c_str());
}

39
src/test/fuzz/util.h
View File

@ -5,6 +5,7 @@
#ifndef BITCOIN_TEST_FUZZ_UTIL_H
#define BITCOIN_TEST_FUZZ_UTIL_H
#include <amount.h>
#include <attributes.h>
#include <optional.h>
#include <script/script.h>
@ -24,6 +25,16 @@ NODISCARD inline std::vector<uint8_t> ConsumeRandomLengthByteVector(FuzzedDataPr
return {s.begin(), s.end()};
}
NODISCARD inline std::vector<std::string> ConsumeRandomLengthStringVector(FuzzedDataProvider& fuzzed_data_provider, size_t max_vector_size = 16, size_t max_string_length = 16) noexcept
{
const size_t n_elements = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, max_vector_size);
std::vector<std::string> r;
for (size_t i = 0; i < n_elements; ++i) {
r.push_back(fuzzed_data_provider.ConsumeRandomLengthString(max_string_length));
}
return r;
}
template <typename T>
NODISCARD inline Optional<T> ConsumeDeserializable(FuzzedDataProvider& fuzzed_data_provider, size_t max_length = 4096) noexcept
{
@ -43,6 +54,11 @@ NODISCARD inline opcodetype ConsumeOpcodeType(FuzzedDataProvider& fuzzed_data_pr
return static_cast<opcodetype>(fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, MAX_OPCODE));
}
NODISCARD inline CAmount ConsumeMoney(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
return fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(0, MAX_MONEY);
}
NODISCARD inline CScript ConsumeScript(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
const std::vector<uint8_t> b = ConsumeRandomLengthByteVector(fuzzed_data_provider);
@ -54,4 +70,27 @@ NODISCARD inline CScriptNum ConsumeScriptNum(FuzzedDataProvider& fuzzed_data_pro
return CScriptNum{fuzzed_data_provider.ConsumeIntegral<int64_t>()};
}
template <typename T>
bool MultiplicationOverflow(T i, T j)
{
static_assert(std::is_integral<T>::value, "Integral required.");
if (std::numeric_limits<T>::is_signed) {
if (i > 0) {
if (j > 0) {
return i > (std::numeric_limits<T>::max() / j);
} else {
return j < (std::numeric_limits<T>::min() / i);
}
} else {
if (j > 0) {
return i < (std::numeric_limits<T>::min() / j);
} else {
return i != 0 && (j < (std::numeric_limits<T>::max() / i));
}
}
} else {
return j != 0 && i > std::numeric_limits<T>::max() / j;
}
}
#endif // BITCOIN_TEST_FUZZ_UTIL_H