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Fix implicit-integer-sign-change in bloom

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MarcoFalke 2022-01-31 17:29:02 +01:00
parent 0ff1391328
commit fa041878de
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2 changed files with 2 additions and 3 deletions
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4
src/common/bloom.cpp
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@ -218,7 +218,7 @@ void CRollingBloomFilter::insert(Span<const unsigned char> vKey)
/* FastMod works with the upper bits of h, so it is safe to ignore that the lower bits of h are already used for bit. */
uint32_t pos = FastRange32(h, data.size());
/* The lowest bit of pos is ignored, and set to zero for the first bit, and to one for the second. */
data[pos & ~1] = (data[pos & ~1] & ~(((uint64_t)1) << bit)) | ((uint64_t)(nGeneration & 1)) << bit;
data[pos & ~1U] = (data[pos & ~1U] & ~(((uint64_t)1) << bit)) | ((uint64_t)(nGeneration & 1)) << bit;
data[pos | 1] = (data[pos | 1] & ~(((uint64_t)1) << bit)) | ((uint64_t)(nGeneration >> 1)) << bit;
}
}
@ -230,7 +230,7 @@ bool CRollingBloomFilter::contains(Span<const unsigned char> vKey) const
int bit = h & 0x3F;
uint32_t pos = FastRange32(h, data.size());
/* If the relevant bit is not set in either data[pos & ~1] or data[pos | 1], the filter does not contain vKey */
if (!(((data[pos & ~1] | data[pos | 1]) >> bit) & 1)) {
if (!(((data[pos & ~1U] | data[pos | 1]) >> bit) & 1)) {
return false;
}
}

1
test/sanitizer_suppressions/ubsan
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@ -60,7 +60,6 @@ unsigned-integer-overflow:util/strencodings.cpp
unsigned-integer-overflow:validation.cpp
implicit-integer-sign-change:addrman.h
implicit-integer-sign-change:bech32.cpp
implicit-integer-sign-change:common/bloom.cpp
implicit-integer-sign-change:coins.h
implicit-integer-sign-change:compat/stdin.cpp
implicit-integer-sign-change:compressor.h