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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/zstd/tests/fuzz/zstd_helpers.c | |
parent | Initial commit. (diff) | |
download | ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/zstd/tests/fuzz/zstd_helpers.c')
-rw-r--r-- | src/zstd/tests/fuzz/zstd_helpers.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/zstd/tests/fuzz/zstd_helpers.c b/src/zstd/tests/fuzz/zstd_helpers.c new file mode 100644 index 000000000..5680bd628 --- /dev/null +++ b/src/zstd/tests/fuzz/zstd_helpers.c @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2016-2020, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under both the BSD-style license (found in the + * LICENSE file in the root directory of this source tree) and the GPLv2 (found + * in the COPYING file in the root directory of this source tree). + * You may select, at your option, one of the above-listed licenses. + */ + +#define ZSTD_STATIC_LINKING_ONLY +#define ZDICT_STATIC_LINKING_ONLY + +#include <string.h> + +#include "zstd_helpers.h" +#include "fuzz_helpers.h" +#include "zstd.h" +#include "zdict.h" + +const int kMinClevel = -3; +const int kMaxClevel = 19; + +static void set(ZSTD_CCtx *cctx, ZSTD_cParameter param, int value) +{ + FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, param, value)); +} + +static void setRand(ZSTD_CCtx *cctx, ZSTD_cParameter param, unsigned min, + unsigned max, FUZZ_dataProducer_t *producer) { + unsigned const value = FUZZ_dataProducer_uint32Range(producer, min, max); + set(cctx, param, value); +} + +ZSTD_compressionParameters FUZZ_randomCParams(size_t srcSize, FUZZ_dataProducer_t *producer) +{ + /* Select compression parameters */ + ZSTD_compressionParameters cParams; + cParams.windowLog = FUZZ_dataProducer_uint32Range(producer, ZSTD_WINDOWLOG_MIN, 15); + cParams.hashLog = FUZZ_dataProducer_uint32Range(producer, ZSTD_HASHLOG_MIN, 15); + cParams.chainLog = FUZZ_dataProducer_uint32Range(producer, ZSTD_CHAINLOG_MIN, 16); + cParams.searchLog = FUZZ_dataProducer_uint32Range(producer, ZSTD_SEARCHLOG_MIN, 9); + cParams.minMatch = FUZZ_dataProducer_uint32Range(producer, ZSTD_MINMATCH_MIN, + ZSTD_MINMATCH_MAX); + cParams.targetLength = FUZZ_dataProducer_uint32Range(producer, 0, 512); + cParams.strategy = FUZZ_dataProducer_uint32Range(producer, ZSTD_STRATEGY_MIN, ZSTD_STRATEGY_MAX); + return ZSTD_adjustCParams(cParams, srcSize, 0); +} + +ZSTD_frameParameters FUZZ_randomFParams(FUZZ_dataProducer_t *producer) +{ + /* Select frame parameters */ + ZSTD_frameParameters fParams; + fParams.contentSizeFlag = FUZZ_dataProducer_uint32Range(producer, 0, 1); + fParams.checksumFlag = FUZZ_dataProducer_uint32Range(producer, 0, 1); + fParams.noDictIDFlag = FUZZ_dataProducer_uint32Range(producer, 0, 1); + return fParams; +} + +ZSTD_parameters FUZZ_randomParams(size_t srcSize, FUZZ_dataProducer_t *producer) +{ + ZSTD_parameters params; + params.cParams = FUZZ_randomCParams(srcSize, producer); + params.fParams = FUZZ_randomFParams(producer); + return params; +} + +void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, FUZZ_dataProducer_t *producer) +{ + ZSTD_compressionParameters cParams = FUZZ_randomCParams(srcSize, producer); + set(cctx, ZSTD_c_windowLog, cParams.windowLog); + set(cctx, ZSTD_c_hashLog, cParams.hashLog); + set(cctx, ZSTD_c_chainLog, cParams.chainLog); + set(cctx, ZSTD_c_searchLog, cParams.searchLog); + set(cctx, ZSTD_c_minMatch, cParams.minMatch); + set(cctx, ZSTD_c_targetLength, cParams.targetLength); + set(cctx, ZSTD_c_strategy, cParams.strategy); + /* Select frame parameters */ + setRand(cctx, ZSTD_c_contentSizeFlag, 0, 1, producer); + setRand(cctx, ZSTD_c_checksumFlag, 0, 1, producer); + setRand(cctx, ZSTD_c_dictIDFlag, 0, 1, producer); + /* Select long distance matching parameters */ + setRand(cctx, ZSTD_c_enableLongDistanceMatching, 0, 1, producer); + setRand(cctx, ZSTD_c_ldmHashLog, ZSTD_HASHLOG_MIN, 16, producer); + setRand(cctx, ZSTD_c_ldmMinMatch, ZSTD_LDM_MINMATCH_MIN, + ZSTD_LDM_MINMATCH_MAX, producer); + setRand(cctx, ZSTD_c_ldmBucketSizeLog, 0, ZSTD_LDM_BUCKETSIZELOG_MAX, + producer); + setRand(cctx, ZSTD_c_ldmHashRateLog, ZSTD_LDM_HASHRATELOG_MIN, + ZSTD_LDM_HASHRATELOG_MAX, producer); + /* Set misc parameters */ + setRand(cctx, ZSTD_c_nbWorkers, 0, 2, producer); + setRand(cctx, ZSTD_c_rsyncable, 0, 1, producer); + setRand(cctx, ZSTD_c_forceMaxWindow, 0, 1, producer); + setRand(cctx, ZSTD_c_literalCompressionMode, 0, 2, producer); + setRand(cctx, ZSTD_c_forceAttachDict, 0, 2, producer); + if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) { + setRand(cctx, ZSTD_c_srcSizeHint, ZSTD_SRCSIZEHINT_MIN, 2 * srcSize, producer); + } + if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) { + setRand(cctx, ZSTD_c_targetCBlockSize, ZSTD_TARGETCBLOCKSIZE_MIN, ZSTD_TARGETCBLOCKSIZE_MAX, producer); + } +} + +FUZZ_dict_t FUZZ_train(void const* src, size_t srcSize, FUZZ_dataProducer_t *producer) +{ + size_t const dictSize = MAX(srcSize / 8, 1024); + size_t const totalSampleSize = dictSize * 11; + FUZZ_dict_t dict = { FUZZ_malloc(dictSize), dictSize }; + char* const samples = (char*)FUZZ_malloc(totalSampleSize); + unsigned nbSamples = 100; + size_t* const samplesSizes = (size_t*)FUZZ_malloc(sizeof(size_t) * nbSamples); + size_t pos = 0; + size_t sample = 0; + ZDICT_fastCover_params_t params; + + for (sample = 0; sample < nbSamples; ++sample) { + size_t const remaining = totalSampleSize - pos; + size_t const offset = FUZZ_dataProducer_uint32Range(producer, 0, MAX(srcSize, 1) - 1); + size_t const limit = MIN(srcSize - offset, remaining); + size_t const toCopy = MIN(limit, remaining / (nbSamples - sample)); + memcpy(samples + pos, src + offset, toCopy); + pos += toCopy; + samplesSizes[sample] = toCopy; + } + memset(samples + pos, 0, totalSampleSize - pos); + + memset(¶ms, 0, sizeof(params)); + params.accel = 5; + params.k = 40; + params.d = 8; + params.f = 14; + params.zParams.compressionLevel = 1; + dict.size = ZDICT_trainFromBuffer_fastCover(dict.buff, dictSize, + samples, samplesSizes, nbSamples, params); + if (ZSTD_isError(dict.size)) { + free(dict.buff); + memset(&dict, 0, sizeof(dict)); + } + + free(samplesSizes); + free(samples); + + return dict; +} |