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fix maxBlockSize resolution + add test cases

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This commit is contained in:
Danielle Rozenblit
2023-01-17 12:24:18 -08:00
parent 14b8defb86
commit 8353a4b095
2 changed files with 91 additions and 2 deletions
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5
lib/compress/zstd_compress.c
View File

@ -1577,7 +1577,7 @@ static size_t ZSTD_estimateCCtxSize_usingCCtxParams_internal(
size_t maxBlockSize)
{
size_t const windowSize = (size_t) BOUNDED(1ULL, 1ULL << cParams->windowLog, pledgedSrcSize);
size_t const blockSize = MIN(maxBlockSize, windowSize);
size_t const blockSize = MIN(ZSTD_resolveMaxBlockSize(maxBlockSize), windowSize);
size_t const maxNbSeq = ZSTD_maxNbSeq(blockSize, cParams->minMatch, useExternalMatchFinder);
size_t const tokenSpace = ZSTD_cwksp_alloc_size(WILDCOPY_OVERLENGTH + blockSize)
+ ZSTD_cwksp_aligned_alloc_size(maxNbSeq * sizeof(seqDef))
@ -1679,7 +1679,7 @@ size_t ZSTD_estimateCStreamSize_usingCCtxParams(const ZSTD_CCtx_params* params)
RETURN_ERROR_IF(params->nbWorkers > 0, GENERIC, "Estimate CCtx size is supported for single-threaded compression only.");
{ ZSTD_compressionParameters const cParams =
ZSTD_getCParamsFromCCtxParams(params, ZSTD_CONTENTSIZE_UNKNOWN, 0, ZSTD_cpm_noAttachDict);
size_t const blockSize = MIN(params->maxBlockSize, (size_t)1 << cParams.windowLog);
size_t const blockSize = MIN(ZSTD_resolveMaxBlockSize(params->maxBlockSize), (size_t)1 << cParams.windowLog);
size_t const inBuffSize = (params->inBufferMode == ZSTD_bm_buffered)
? ((size_t)1 << cParams.windowLog) + blockSize
: 0;
@ -1964,6 +1964,7 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
assert(params->useRowMatchFinder != ZSTD_ps_auto);
assert(params->useBlockSplitter != ZSTD_ps_auto);
assert(params->ldmParams.enableLdm != ZSTD_ps_auto);
assert(params->maxBlockSize != 0);
if (params->ldmParams.enableLdm == ZSTD_ps_enable) {
/* Adjust long distance matching parameters */
ZSTD_ldm_adjustParameters(&zc->appliedParams.ldmParams, &params->cParams);

88
tests/fuzzer.c
View File

@ -1725,6 +1725,94 @@ static int basicUnitTests(U32 const seed, double compressibility)
if (!ZSTD_isError(r)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : test estimation functions with default cctx params : ", testNb++);
{
// Test ZSTD_estimateCCtxSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t const cctxSizeDefault = ZSTD_estimateCCtxSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3));
{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}
// Test ZSTD_estimateCStreamSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t const cctxSizeDefault = ZSTD_estimateCStreamSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3) );
{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : test estimation functions with maxBlockSize = 0 : ", testNb++);
{
// Test ZSTD_estimateCCtxSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t cctxSizeDefault;
CHECK_Z(ZSTD_CCtxParams_setParameter(params, ZSTD_c_maxBlockSize, 0));
cctxSizeDefault = ZSTD_estimateCCtxSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3) );
{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}
// Test ZSTD_estimateCStreamSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t cctxSizeDefault;
CHECK_Z(ZSTD_CCtxParams_setParameter(params, ZSTD_c_maxBlockSize, 0));
cctxSizeDefault = ZSTD_estimateCStreamSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3) );
{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}
}
DISPLAYLEVEL(3, "OK \n");
}
free(staticCCtxBuffer);
free(staticDCtxBuffer);