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fuzz: enable running fuzz test cases in Debug mode

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When building with

 BUILD_FOR_FUZZING=OFF
 BUILD_FUZZ_BINARY=ON
 CMAKE_BUILD_TYPE=Debug

allow the fuzz binary to execute given test cases (without actual
fuzzing) to make it easier to reproduce fuzz test failures in a more
normal debug build.

In Debug builds, deterministic fuzz behaviour is controlled via a runtime
variable, which is normally false, but set to true automatically in the
fuzz binary, unless the FUZZ_NONDETERMINISM environment variable is set.
This commit is contained in:
Anthony Towns
2025-03-22 01:02:13 +10:00
parent 639279e86a
commit c1d01f59ac
6 changed files with 48 additions and 16 deletions
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2
src/pow.cpp
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@@ -139,7 +139,7 @@ bool PermittedDifficultyTransition(const Consensus::Params& params, int64_t heig
// the most significant bit of the last byte of the hash is set.
bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params& params)
{
if constexpr (G_FUZZING) return (hash.data()[31] & 0x80) == 0;
if (EnableFuzzDeterminism()) return (hash.data()[31] & 0x80) == 0;
return CheckProofOfWorkImpl(hash, nBits, params);
}