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Merge pull request #2375 from senhuang42/ldm_oss_fuzz_testcase

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Add a test case for LDM + opt parser with small uncompressible block
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sen
2020-10-29 09:32:05 -04:00
committed by GitHub
parent bb4ea40e4d 7198ebb213
commit ff93440fc6
1 changed files with 42 additions and 0 deletions
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42
tests/fuzzer.c
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@ -717,6 +717,48 @@ static int basicUnitTests(U32 const seed, double compressibility)
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : LDM + opt parser with small uncompressible block ", testNb++);
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
ZSTD_DCtx* dctx = ZSTD_createDCtx();
size_t const srcSize = 300 KB;
size_t const flushSize = 128 KB + 5;
size_t const dstSize = ZSTD_compressBound(srcSize);
char* src = (char*)CNBuffer;
char* dst = (char*)compressedBuffer;
ZSTD_outBuffer out = { dst, dstSize, 0 };
ZSTD_inBuffer in = { src, flushSize, 0 };
if (!cctx || !dctx) {
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}
RDG_genBuffer(src, srcSize, 0.5, 0.5, seed);
/* Force an LDM to exist that crosses block boundary into uncompressible block */
memcpy(src + 125 KB, src, 3 KB + 5);
/* Enable MT, LDM, and opt parser */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19));
/* Flushes a block of 128 KB and block of 5 bytes */
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
/* Compress the rest */
in.size = 300 KB;
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
CHECK_Z(ZSTD_decompress(decodedBuffer, CNBuffSize, dst, out.pos));
ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : testing ldm dictionary gets invalidated : ", testNb++);
{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();