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fuzz: Increase branch coverage of the float fuzz target

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MarcoFalke 2021-06-07 13:40:12 +02:00
parent fad0c58c3e
commit fa13f34bf3
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1 changed files with 28 additions and 1 deletions
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29
src/test/fuzz/float.cpp
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@ -5,6 +5,7 @@
#include <memusage.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <util/serfloat.h>
#include <version.h>
@ -17,7 +18,33 @@ FUZZ_TARGET(float)
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
{
const double d = fuzzed_data_provider.ConsumeFloatingPoint<double>();
const double d{[&] {
double tmp;
CallOneOf(
fuzzed_data_provider,
// an actual number
[&] { tmp = fuzzed_data_provider.ConsumeFloatingPoint<double>(); },
// special numbers and NANs
[&] { tmp = fuzzed_data_provider.PickValueInArray({
std::numeric_limits<double>::infinity(),
-std::numeric_limits<double>::infinity(),
std::numeric_limits<double>::min(),
-std::numeric_limits<double>::min(),
std::numeric_limits<double>::max(),
-std::numeric_limits<double>::max(),
std::numeric_limits<double>::lowest(),
-std::numeric_limits<double>::lowest(),
std::numeric_limits<double>::quiet_NaN(),
-std::numeric_limits<double>::quiet_NaN(),
std::numeric_limits<double>::signaling_NaN(),
-std::numeric_limits<double>::signaling_NaN(),
std::numeric_limits<double>::denorm_min(),
-std::numeric_limits<double>::denorm_min(),
}); },
// Anything from raw memory (also checks that DecodeDouble doesn't crash on any input)
[&] { tmp = DecodeDouble(fuzzed_data_provider.ConsumeIntegral<uint64_t>()); });
return tmp;
}()};
(void)memusage::DynamicUsage(d);
uint64_t encoded = EncodeDouble(d);