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tests: Clarify how we avoid hitting the signed integer overflow in CFeeRate::GetFeePerK() when fuzzing

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practicalswift 2020-04-30 14:19:27 +00:00
parent 13c1f6b24f
commit 2bcc2bd742
1 changed files with 4 additions and 1 deletions
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5
src/test/fuzz/util.h
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@ -104,7 +104,10 @@ NODISCARD inline CTxMemPoolEntry ConsumeTxMemPoolEntry(FuzzedDataProvider& fuzze
{
// Avoid:
// policy/feerate.cpp:28:34: runtime error: signed integer overflow: 34873208148477500 * 1000 cannot be represented in type 'long'
const CAmount fee = ConsumeMoney(fuzzed_data_provider) / static_cast<CAmount>(100);
//
// Reproduce using CFeeRate(348732081484775, 10).GetFeePerK()
const CAmount fee = std::min<CAmount>(ConsumeMoney(fuzzed_data_provider), std::numeric_limits<CAmount>::max() / static_cast<CAmount>(100000));
assert(MoneyRange(fee));
const int64_t time = fuzzed_data_provider.ConsumeIntegral<int64_t>();
const unsigned int entry_height = fuzzed_data_provider.ConsumeIntegral<unsigned int>();
const bool spends_coinbase = fuzzed_data_provider.ConsumeBool();