diff options
Diffstat (limited to 'tests/frametest.c')
| -rw-r--r-- | tests/frametest.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/tests/frametest.c b/tests/frametest.c index f891530..236a98c 100644 --- a/tests/frametest.c +++ b/tests/frametest.c @@ -995,13 +995,13 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi BYTE* op = (BYTE*)compressedBuffer; BYTE* const oend = op + (neverFlush ? LZ4F_compressFrameBound(srcSize, prefsPtr) : compressedBufferSize); /* when flushes are possible, can't guarantee a max compressed size */ unsigned const maxBits = FUZ_highbit((U32)srcSize); - size_t cSegmentSize; LZ4F_compressOptions_t cOptions; memset(&cOptions, 0, sizeof(cOptions)); - cSegmentSize = LZ4F_compressBegin(cCtx, op, (size_t)(oend-op), prefsPtr); - CHECK(LZ4F_isError(cSegmentSize), "Compression header failed (error %i)", - (int)cSegmentSize); - op += cSegmentSize; + { size_t const fhSize = LZ4F_compressBegin(cCtx, op, (size_t)(oend-op), prefsPtr); + CHECK(LZ4F_isError(fhSize), "Compression header failed (error %i)", + (int)fhSize); + op += fhSize; + } while (ip < iend) { unsigned const nbBitsSeg = FUZ_rand(&randState) % maxBits; size_t const sampleMax = (FUZ_rand(&randState) & ((1<<nbBitsSeg)-1)) + 1; @@ -1024,8 +1024,20 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi DISPLAYLEVEL(6,"flushing %u bytes \n", (unsigned)flushSize); CHECK(LZ4F_isError(flushSize), "Compression failed (error %i)", (int)flushSize); op += flushSize; - } } - } + if ((FUZ_rand(&randState) % 1024) == 3) { + /* add an empty block (requires uncompressed flag) */ + op[0] = op[1] = op[2] = 0; + op[3] = 0x80; /* 0x80000000U in little-endian format */ + op += 4; + if ((prefsPtr!= NULL) && prefsPtr->frameInfo.blockChecksumFlag) { + U32 const bc32 = XXH32(op, 0, 0); + op[0] = (BYTE)bc32; /* little endian format */ + op[1] = (BYTE)(bc32>>8); + op[2] = (BYTE)(bc32>>16); + op[3] = (BYTE)(bc32>>24); + op += 4; + } } } } + } /* while (ip<iend) */ CHECK(op>=oend, "LZ4F_compressFrameBound overflow"); { size_t const dstEndSafeSize = LZ4F_compressBound(0, prefsPtr); int const tooSmallDstEnd = ((FUZ_rand(&randState) & 31) == 3); @@ -1086,8 +1098,8 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi DISPLAYLEVEL(6, "noisy decompression \n"); test_lz4f_decompression(compressedBuffer, cSize, srcStart, srcSize, crcOrig, &randState, dCtxNoise, seed, testNb); /* note : we don't analyze result here : it probably failed, which is expected. - * We just check for potential out-of-bound reads and writes. */ - LZ4F_resetDecompressionContext(dCtxNoise); /* context must be reset after an error */ + * The sole purpose is to catch potential out-of-bound reads and writes. */ + LZ4F_resetDecompressionContext(dCtxNoise); /* context must be reset after an error */ #endif } /* for ( ; (testNb < nbTests) ; ) */ |