diff options
Diffstat (limited to 'tests/fuzzer.c')
| -rw-r--r-- | tests/fuzzer.c | 101 |
1 files changed, 99 insertions, 2 deletions
diff --git a/tests/fuzzer.c b/tests/fuzzer.c index c134fe3..db05738 100644 --- a/tests/fuzzer.c +++ b/tests/fuzzer.c @@ -43,6 +43,7 @@ #include <stdio.h> /* fgets, sscanf */ #include <string.h> /* strcmp */ #include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */ +#define LZ4_STATIC_LINKING_ONLY #define LZ4_HC_STATIC_LINKING_ONLY #include "lz4hc.h" #define XXH_STATIC_LINKING_ONLY @@ -302,9 +303,9 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c U32 testNb = 0; U32 randState = FUZ_rand(&coreRandState) ^ PRIME3; int const blockSize = (FUZ_rand(&randState) % (FUZ_MAX_BLOCK_SIZE-1)) + 1; - int const blockStart = FUZ_rand(&randState) % (COMPRESSIBLE_NOISE_LENGTH - blockSize); + int const blockStart = (FUZ_rand(&randState) % (COMPRESSIBLE_NOISE_LENGTH - blockSize - 1)) + 1; int const dictSizeRand = FUZ_rand(&randState) % FUZ_MAX_DICT_SIZE; - int const dictSize = MIN(dictSizeRand, blockStart); + int const dictSize = MIN(dictSizeRand, blockStart - 1); int const compressionLevel = FUZ_rand(&randState) % (LZ4HC_CLEVEL_MAX+1); char* const block = ((char*)CNBuffer) + blockStart; const char* dict = block - dictSize; @@ -402,6 +403,11 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c ret = LZ4_compress_fast_extState(stateLZ4, block, compressedBuffer, blockSize, (int)compressedBufferSize, 8); FUZ_CHECKTEST(ret==0, "LZ4_compress_fast_extState() failed"); + /* Test compression using fast reset external state*/ + FUZ_DISPLAYTEST; + ret = LZ4_compress_fast_extState_fastReset(stateLZ4, block, compressedBuffer, blockSize, (int)compressedBufferSize, 8); + FUZ_CHECKTEST(ret==0, "LZ4_compress_fast_extState_fastReset() failed"); + /* Test compression */ FUZ_DISPLAYTEST; ret = LZ4_compress_default(block, compressedBuffer, blockSize, (int)compressedBufferSize); @@ -626,6 +632,97 @@ static int FUZ_test(U32 seed, U32 nbCycles, const U32 startCycle, const double c FUZ_CHECKTEST(decodedBuffer[blockSize-missingBytes], "LZ4_decompress_safe_usingDict overrun specified output buffer size (-%u byte) (blockSize=%i)", missingBytes, blockSize); } } + /* Compress using external dictionary stream */ + FUZ_DISPLAYTEST; + { + LZ4_stream_t LZ4_stream; + int expectedSize; + U32 expectedCrc; + + LZ4_loadDict(&LZ4dict, dict, dictSize); + expectedSize = LZ4_compress_fast_continue(&LZ4dict, block, compressedBuffer, blockSize, (int)compressedBufferSize, 1); + FUZ_CHECKTEST(expectedSize<=0, "LZ4_compress_fast_continue reference compression for extDictCtx should have succeeded"); + expectedCrc = XXH32(compressedBuffer, expectedSize, 0); + + LZ4_loadDict(&LZ4dict, dict, dictSize); + + LZ4_resetStream(&LZ4_stream); + LZ4_attach_dictionary(&LZ4_stream, &LZ4dict); + blockContinueCompressedSize = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, (int)compressedBufferSize, 1); + FUZ_CHECKTEST(blockContinueCompressedSize==0, "LZ4_compress_fast_continue using extDictCtx failed"); + + /* In the future, it might be desirable to let extDictCtx mode's + * output diverge from the output generated by regular extDict mode. + * Until that time, this comparison serves as a good regression + * test. + */ + FUZ_CHECKTEST(blockContinueCompressedSize != expectedSize, "LZ4_compress_fast_continue using extDictCtx produced different-sized output (%d expected vs %d actual)", expectedSize, blockContinueCompressedSize); + FUZ_CHECKTEST(XXH32(compressedBuffer, blockContinueCompressedSize, 0) != expectedCrc, "LZ4_compress_fast_continue using extDictCtx produced different output"); + + FUZ_DISPLAYTEST; + LZ4_resetStream(&LZ4_stream); + LZ4_attach_dictionary(&LZ4_stream, &LZ4dict); + ret = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, blockContinueCompressedSize-1, 1); + FUZ_CHECKTEST(ret>0, "LZ4_compress_fast_continue using extDictCtx should fail : one missing byte for output buffer : %i written, %i buffer", ret, blockContinueCompressedSize); + + FUZ_DISPLAYTEST; + LZ4_resetStream(&LZ4_stream); + LZ4_attach_dictionary(&LZ4_stream, &LZ4dict); + ret = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, blockContinueCompressedSize, 1); + FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_compress_limitedOutput_compressed size is different (%i != %i)", ret, blockContinueCompressedSize); + FUZ_CHECKTEST(ret<=0, "LZ4_compress_fast_continue using extDictCtx should work : enough size available within output buffer"); + FUZ_CHECKTEST(ret != expectedSize, "LZ4_compress_fast_continue using extDictCtx produced different-sized output"); + FUZ_CHECKTEST(XXH32(compressedBuffer, ret, 0) != expectedCrc, "LZ4_compress_fast_continue using extDictCtx produced different output"); + + FUZ_DISPLAYTEST; + LZ4_resetStream_fast(&LZ4_stream); + LZ4_attach_dictionary(&LZ4_stream, &LZ4dict); + ret = LZ4_compress_fast_continue(&LZ4_stream, block, compressedBuffer, blockSize, blockContinueCompressedSize, 1); + FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_compress_limitedOutput_compressed size is different (%i != %i)", ret, blockContinueCompressedSize); + FUZ_CHECKTEST(ret<=0, "LZ4_compress_fast_continue using extDictCtx with re-used context should work : enough size available within output buffer"); + FUZ_CHECKTEST(ret != expectedSize, "LZ4_compress_fast_continue using extDictCtx produced different-sized output"); + FUZ_CHECKTEST(XXH32(compressedBuffer, ret, 0) != expectedCrc, "LZ4_compress_fast_continue using extDictCtx produced different output"); + } + + /* Decompress with dictionary as external */ + FUZ_DISPLAYTEST; + decodedBuffer[blockSize] = 0; + ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer, blockSize, dict, dictSize); + FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_decompress_fast_usingDict did not read all compressed block input"); + FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_fast_usingDict overrun specified output buffer size"); + crcCheck = XXH32(decodedBuffer, blockSize, 0); + if (crcCheck!=crcOrig) FUZ_findDiff(block, decodedBuffer); + FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_usingDict corrupted decoded data (dict %i)", dictSize); + + FUZ_DISPLAYTEST; + decodedBuffer[blockSize] = 0; + ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize, dict, dictSize); + FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_usingDict did not regenerate original data"); + FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe_usingDict overrun specified output buffer size"); + crcCheck = XXH32(decodedBuffer, blockSize, 0); + FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_usingDict corrupted decoded data"); + + FUZ_DISPLAYTEST; + decodedBuffer[blockSize-1] = 0; + ret = LZ4_decompress_fast_usingDict(compressedBuffer, decodedBuffer, blockSize-1, dict, dictSize); + FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast_usingDict should have failed : wrong original size (-1 byte)"); + FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_fast_usingDict overrun specified output buffer size"); + + FUZ_DISPLAYTEST; + decodedBuffer[blockSize-1] = 0; + ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-1, dict, dictSize); + FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_usingDict should have failed : not enough output size (-1 byte)"); + FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_safe_usingDict overrun specified output buffer size"); + + FUZ_DISPLAYTEST; + { U32 const missingBytes = (FUZ_rand(&randState) & 0xF) + 2; + if ((U32)blockSize > missingBytes) { + decodedBuffer[blockSize-missingBytes] = 0; + ret = LZ4_decompress_safe_usingDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-missingBytes, dict, dictSize); + FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_usingDict should have failed : output buffer too small (-%u byte)", missingBytes); + FUZ_CHECKTEST(decodedBuffer[blockSize-missingBytes], "LZ4_decompress_safe_usingDict overrun specified output buffer size (-%u byte) (blockSize=%i)", missingBytes, blockSize); + } } + /* Compress HC using External dictionary */ FUZ_DISPLAYTEST; dict -= (FUZ_rand(&randState) & 7); /* even bigger separation */ |