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Make the producer use the same amount of entropy

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This commit is contained in:
Daniel Kutenin
2023-01-10 20:30:03 +00:00
committed by Nick Terrell
parent 3ac0b91302
commit ca2ff788df
1 changed files with 15 additions and 3 deletions
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18
tests/fuzz/zstd_helpers.c
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@@ -26,9 +26,14 @@ static void set(ZSTD_CCtx *cctx, ZSTD_cParameter param, int value)
FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, param, value)); FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, param, value));
} }
static unsigned produceParamValue(unsigned min, unsigned max,
FUZZ_dataProducer_t *producer) {
return FUZZ_dataProducer_uint32Range(producer, min, max);
}
static void setRand(ZSTD_CCtx *cctx, ZSTD_cParameter param, unsigned min, static void setRand(ZSTD_CCtx *cctx, ZSTD_cParameter param, unsigned min,
unsigned max, FUZZ_dataProducer_t *producer) { unsigned max, FUZZ_dataProducer_t *producer) {
unsigned const value = FUZZ_dataProducer_uint32Range(producer, min, max); unsigned const value = produceParamValue(min, max, producer);
set(cctx, param, value); set(cctx, param, value);
} }
@@ -89,11 +94,18 @@ void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, FUZZ_dataProducer
setRand(cctx, ZSTD_c_ldmHashRateLog, ZSTD_LDM_HASHRATELOG_MIN, setRand(cctx, ZSTD_c_ldmHashRateLog, ZSTD_LDM_HASHRATELOG_MIN,
ZSTD_LDM_HASHRATELOG_MAX, producer); ZSTD_LDM_HASHRATELOG_MAX, producer);
/* Set misc parameters */ /* Set misc parameters */
setRand(cctx, ZSTD_c_nbWorkers, 0, 2, producer);
setRand(cctx, ZSTD_c_rsyncable, 0, 1, producer);
#ifndef ZSTD_MULTITHREAD #ifndef ZSTD_MULTITHREAD
// To reproduce with or without ZSTD_MULTITHREAD, we are going to use
// the same amount of entropy.
unsigned const nbWorkers_value = produceParamValue(0, 2, producer);
unsigned const rsyncable_value = produceParamValue(0, 1, producer);
(void)nbWorkers_value;
(void)rsyncable_value;
set(cctx, ZSTD_c_nbWorkers, 0); set(cctx, ZSTD_c_nbWorkers, 0);
set(cctx, ZSTD_c_rsyncable, 0); set(cctx, ZSTD_c_rsyncable, 0);
#else
setRand(cctx, ZSTD_c_nbWorkers, 0, 2, producer);
setRand(cctx, ZSTD_c_rsyncable, 0, 1, producer);
#endif #endif
setRand(cctx, ZSTD_c_useRowMatchFinder, 0, 2, producer); setRand(cctx, ZSTD_c_useRowMatchFinder, 0, 2, producer);
setRand(cctx, ZSTD_c_enableDedicatedDictSearch, 0, 1, producer); setRand(cctx, ZSTD_c_enableDedicatedDictSearch, 0, 1, producer);