--- /dev/null
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * 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"
+#include "sequence_producer.h"
+#include "fuzz_third_party_seq_prod.h"
+
+const int kMinClevel = -3;
+const int kMaxClevel = 19;
+
+void* FUZZ_seqProdState = NULL;
+
+static void set(ZSTD_CCtx *cctx, ZSTD_cParameter param, int 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,
+ unsigned max, FUZZ_dataProducer_t *producer) {
+ unsigned const value = produceParamValue(min, max, producer);
+ 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;
+}
+
+static void setSequenceProducerParams(ZSTD_CCtx *cctx, FUZZ_dataProducer_t *producer) {
+#ifdef FUZZ_THIRD_PARTY_SEQ_PROD
+ ZSTD_registerSequenceProducer(
+ cctx,
+ FUZZ_seqProdState,
+ FUZZ_thirdPartySeqProd
+ );
+#else
+ ZSTD_registerSequenceProducer(
+ cctx,
+ NULL,
+ simpleSequenceProducer
+ );
+#endif
+
+#ifdef FUZZ_THIRD_PARTY_SEQ_PROD
+ FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableSeqProducerFallback, 1));
+#else
+ setRand(cctx, ZSTD_c_enableSeqProducerFallback, 0, 1, producer);
+#endif
+ 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);
+ 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, ZSTD_ps_auto, ZSTD_ps_disable, 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 */
+#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_rsyncable, 0);
+#else
+ setRand(cctx, ZSTD_c_nbWorkers, 0, 2, producer);
+ setRand(cctx, ZSTD_c_rsyncable, 0, 1, producer);
+#endif
+ setRand(cctx, ZSTD_c_useRowMatchFinder, 0, 2, producer);
+ setRand(cctx, ZSTD_c_enableDedicatedDictSearch, 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);
+ setRand(cctx, ZSTD_c_useBlockSplitter, 0, 2, producer);
+ setRand(cctx, ZSTD_c_deterministicRefPrefix, 0, 1, producer);
+ setRand(cctx, ZSTD_c_prefetchCDictTables, 0, 2, producer);
+ setRand(cctx, ZSTD_c_maxBlockSize, ZSTD_BLOCKSIZE_MAX_MIN, ZSTD_BLOCKSIZE_MAX, producer);
+ setRand(cctx, ZSTD_c_validateSequences, 0, 1, producer);
+ setRand(cctx, ZSTD_c_searchForExternalRepcodes, 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);
+ }
+
+#ifdef FUZZ_THIRD_PARTY_SEQ_PROD
+ setSequenceProducerParams(cctx, producer);
+#else
+ if (FUZZ_dataProducer_uint32Range(producer, 0, 10) == 1) {
+ setSequenceProducerParams(cctx, producer);
+ } else {
+ ZSTD_registerSequenceProducer(cctx, NULL, NULL);
+ }
+#endif
+}
+
+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, (const char*)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;
+}
notaz.gp2x.de / pcsx_rearmed.git / blobdiff