[test] Test that the ldm dictionary gets invalidated on reset
diff --git a/tests/fuzzer.c b/tests/fuzzer.c
index e7f5143..49ea53f 100644
--- a/tests/fuzzer.c
+++ b/tests/fuzzer.c
@@ -655,6 +655,57 @@
}
DISPLAYLEVEL(3, "OK \n");
+ DISPLAYLEVEL(3, "test%3i : testing ldm dictionary gets invalidated : ", testNb++);
+ {
+ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
+ ZSTD_DCtx* const dctx = ZSTD_createDCtx();
+ void* dict = (void*)malloc(CNBuffSize);
+ size_t const kWindowLog = 10;
+ size_t const kWindowSize = (size_t)1 << kWindowLog;
+ size_t const dictSize = kWindowSize * 10;
+ size_t const srcSize1 = kWindowSize / 2;
+ size_t const srcSize2 = kWindowSize * 10;
+ int nbWorkers;
+
+ if (CNBuffSize < dictSize) goto _output_error;
+
+ RDG_genBuffer(dict, dictSize, 0.5, 0.5, seed);
+ RDG_genBuffer(CNBuffer, srcSize1 + srcSize2, 0.5, 0.5, seed);
+
+ /* Enable checksum to verify round trip. */
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
+ /* Disable content size to skip single-pass decompression. */
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_contentSizeFlag, 0));
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, (int)kWindowLog));
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, 1));
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmMinMatch, 32));
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmHashRateLog, 1));
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmHashLog, 12));
+
+ for (nbWorkers = 0; nbWorkers < 3; ++nbWorkers) {
+ CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, nbWorkers));
+ /* Round trip once with a dictionary. */
+ CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, dictSize));
+ cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, srcSize1);
+ CHECK_Z(cSize);
+ CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dict, dictSize));
+ cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, srcSize2);
+ /* Streaming decompression to catch out of bounds offsets. */
+ {
+ ZSTD_inBuffer in = {compressedBuffer, cSize, 0};
+ ZSTD_outBuffer out = {decodedBuffer, CNBuffSize, 0};
+ size_t const dSize = ZSTD_decompressStream(dctx, &out, &in);
+ CHECK_Z(dSize);
+ if (dSize != 0) goto _output_error;
+ }
+ }
+
+ ZSTD_freeCCtx(cctx);
+ ZSTD_freeDCtx(dctx);
+ free(dict);
+ }
+ DISPLAYLEVEL(3, "OK \n");
+
/* Note: this test takes 0.5 seconds to run */
DISPLAYLEVEL(3, "test%3i : testing refPrefx vs refPrefx + ldm (size comparison) : ", testNb++);
{
