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Fuzz the external matchfinder API

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This commit is contained in:
Elliot Gorokhovsky
2023-01-19 13:33:25 -08:00
parent bce0382c82
commit 3f9f568aa6
2 changed files with 40 additions and 8 deletions
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tests/fuzz/zstd_helpers.c
+18
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@@ -17,6 +17,7 @@
#include "fuzz_helpers.h"
#include "zstd.h"
#include "zdict.h"
#include "matchfinder.h"
const int kMinClevel = -3;
const int kMaxClevel = 19;
@@ -70,6 +71,17 @@ ZSTD_parameters FUZZ_randomParams(size_t srcSize, FUZZ_dataProducer_t *producer)
return params;
}
static void setExternalMatchFinderParams(ZSTD_CCtx *cctx, FUZZ_dataProducer_t *producer) {
ZSTD_registerExternalMatchFinder(
cctx,
NULL,
simpleExternalMatchFinder
);
setRand(cctx, ZSTD_c_enableMatchFinderFallback, 0, 1, producer);
FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 0));
FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_disable));
}
void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, FUZZ_dataProducer_t *producer)
{
ZSTD_compressionParameters cParams = FUZZ_randomCParams(srcSize, producer);
@@ -122,6 +134,12 @@ void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, FUZZ_dataProducer
if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) {
setRand(cctx, ZSTD_c_targetCBlockSize, ZSTD_TARGETCBLOCKSIZE_MIN, ZSTD_TARGETCBLOCKSIZE_MAX, producer);
}
if (FUZZ_dataProducer_uint32Range(producer, 0, 10) == 0) {
setExternalMatchFinderParams(cctx, producer);
} else {
ZSTD_registerExternalMatchFinder(cctx, NULL, NULL);
}
}
FUZZ_dict_t FUZZ_train(void const* src, size_t srcSize, FUZZ_dataProducer_t *producer)