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fuzz: make FuzzedDataProvider usage deterministic

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There exist many usages of `fuzzed_data_provider` where it is evaluated directly in the function call.
Unfortunately, the order of evaluation of function arguments is unspecified. This means it can differ
between compilers/version/optimization levels etc. But when the evaluation order changes, the same
fuzzing input will produce different output, which is bad for coverage/reproducibility.

This PR fixes all these cases where by moving multiple calls to `fuzzed_data_provider` out of the
function arguments.
This commit is contained in:
Martin Leitner-Ankerl
2023-12-09 13:19:02 +01:00
parent 3e691258d8
commit 01960c53c7
18 changed files with 129 additions and 66 deletions
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4
src/test/fuzz/script_format.cpp
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@@ -30,5 +30,7 @@ FUZZ_TARGET(script_format, .init = initialize_script_format)
(void)ScriptToAsmStr(script, /*fAttemptSighashDecode=*/fuzzed_data_provider.ConsumeBool());
UniValue o1(UniValue::VOBJ);
ScriptToUniv(script, /*out=*/o1, /*include_hex=*/fuzzed_data_provider.ConsumeBool(), /*include_address=*/fuzzed_data_provider.ConsumeBool());
auto include_hex = fuzzed_data_provider.ConsumeBool();
auto include_address = fuzzed_data_provider.ConsumeBool();
ScriptToUniv(script, /*out=*/o1, include_hex, include_address);
}