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chez-openbsd/lz4/tests/frametest.c

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feat: 9.5.9
2022-07-29 15:12:07 +02:00
/*
frameTest - test tool for lz4frame
Copyright (C) Yann Collet 2014-2016
GPL v2 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
You can contact the author at :
- LZ4 homepage : http://www.lz4.org
- LZ4 source repository : https://github.com/lz4/lz4
*/
/*-************************************
* Compiler specific
**************************************/
#ifdef _MSC_VER /* Visual Studio */
# pragma warning(disable : 26451) /* disable: Arithmetic overflow */
#endif
/*-************************************
* Includes
**************************************/
#include "util.h" /* U32 */
#include <stdlib.h> /* malloc, free */
#include <stdio.h> /* fprintf */
#include <string.h> /* strcmp */
#include <time.h> /* clock_t, clock(), CLOCKS_PER_SEC */
#include <assert.h>
#include "lz4frame.h" /* included multiple times to test correctness/safety */
#include "lz4frame.h"
#define LZ4F_STATIC_LINKING_ONLY
#include "lz4frame.h"
#include "lz4frame.h"
#define LZ4_STATIC_LINKING_ONLY /* LZ4_DISTANCE_MAX */
#include "lz4.h" /* LZ4_VERSION_STRING */
#define XXH_STATIC_LINKING_ONLY
#include "xxhash.h" /* XXH64 */
/* unoptimized version; solves endianess & alignment issues */
static void FUZ_writeLE32 (void* dstVoidPtr, U32 value32)
{
BYTE* dstPtr = (BYTE*)dstVoidPtr;
dstPtr[0] = (BYTE) value32;
dstPtr[1] = (BYTE)(value32 >> 8);
dstPtr[2] = (BYTE)(value32 >> 16);
dstPtr[3] = (BYTE)(value32 >> 24);
}
/*-************************************
* Constants
**************************************/
#define LZ4F_MAGIC_SKIPPABLE_START 0x184D2A50U
#define KB *(1U<<10)
#define MB *(1U<<20)
#define GB *(1U<<30)
static const U32 nbTestsDefault = 256 KB;
#define FUZ_COMPRESSIBILITY_DEFAULT 50
static const U32 prime1 = 2654435761U;
static const U32 prime2 = 2246822519U;
/*-************************************
* Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
#define DISPLAYUPDATE(l, ...) if (displayLevel>=l) { \
if ((FUZ_GetClockSpan(g_clockTime) > refreshRate) || (displayLevel>=4)) \
{ g_clockTime = clock(); DISPLAY(__VA_ARGS__); \
if (displayLevel>=4) fflush(stdout); } }
static const clock_t refreshRate = CLOCKS_PER_SEC / 6;
static clock_t g_clockTime = 0;
/*-***************************************
* Local Parameters
*****************************************/
static U32 no_prompt = 0;
static U32 displayLevel = 2;
static U32 use_pause = 0;
/*-*******************************************************
* Fuzzer functions
*********************************************************/
#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
#define MAX(a,b) ( (a) > (b) ? (a) : (b) )
static clock_t FUZ_GetClockSpan(clock_t clockStart)
{
return clock() - clockStart; /* works even if overflow; max span ~ 30 mn */
}
#define FUZ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
unsigned int FUZ_rand(unsigned int* src)
{
U32 rand32 = *src;
rand32 *= prime1;
rand32 += prime2;
rand32 = FUZ_rotl32(rand32, 13);
*src = rand32;
return rand32 >> 5;
}
#define FUZ_RAND15BITS (FUZ_rand(seed) & 0x7FFF)
#define FUZ_RANDLENGTH ( (FUZ_rand(seed) & 3) ? (FUZ_rand(seed) % 15) : (FUZ_rand(seed) % 510) + 15)
static void FUZ_fillCompressibleNoiseBuffer(void* buffer, size_t bufferSize, double proba, U32* seed)
{
BYTE* BBuffer = (BYTE*)buffer;
size_t pos = 0;
U32 P32 = (U32)(32768 * proba);
/* First Byte */
BBuffer[pos++] = (BYTE)(FUZ_rand(seed));
while (pos < bufferSize) {
/* Select : Literal (noise) or copy (within 64K) */
if (FUZ_RAND15BITS < P32) {
/* Copy (within 64K) */
size_t const lengthRand = FUZ_RANDLENGTH + 4;
size_t const length = MIN(lengthRand, bufferSize - pos);
size_t const end = pos + length;
size_t const offsetRand = FUZ_RAND15BITS + 1;
size_t const offset = MIN(offsetRand, pos);
size_t match = pos - offset;
while (pos < end) BBuffer[pos++] = BBuffer[match++];
} else {
/* Literal (noise) */
size_t const lengthRand = FUZ_RANDLENGTH + 4;
size_t const length = MIN(lengthRand, bufferSize - pos);
size_t const end = pos + length;
while (pos < end) BBuffer[pos++] = (BYTE)(FUZ_rand(seed) >> 5);
} }
}
static unsigned FUZ_highbit(U32 v32)
{
unsigned nbBits = 0;
if (v32==0) return 0;
while (v32) {v32 >>= 1; nbBits ++;}
return nbBits;
}
/*-*******************************************************
* Tests
*********************************************************/
#define CHECK_V(v,f) v = f; if (LZ4F_isError(v)) { fprintf(stderr, "%s \n", LZ4F_getErrorName(v)); goto _output_error; }
#define CHECK(f) { LZ4F_errorCode_t const CHECK_V(err_ , f); }
int basicTests(U32 seed, double compressibility)
{
#define COMPRESSIBLE_NOISE_LENGTH (2 MB)
void* const CNBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
size_t const cBuffSize = LZ4F_compressFrameBound(COMPRESSIBLE_NOISE_LENGTH, NULL);
void* const compressedBuffer = malloc(cBuffSize);
void* const decodedBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
U32 randState = seed;
size_t cSize, testSize;
LZ4F_decompressionContext_t dCtx = NULL;
LZ4F_compressionContext_t cctx = NULL;
U64 crcOrig;
int basicTests_error = 0;
LZ4F_preferences_t prefs;
memset(&prefs, 0, sizeof(prefs));
if (!CNBuffer || !compressedBuffer || !decodedBuffer) {
DISPLAY("allocation error, not enough memory to start fuzzer tests \n");
goto _output_error;
}
FUZ_fillCompressibleNoiseBuffer(CNBuffer, COMPRESSIBLE_NOISE_LENGTH, compressibility, &randState);
crcOrig = XXH64(CNBuffer, COMPRESSIBLE_NOISE_LENGTH, 1);
/* LZ4F_compressBound() : special case : srcSize == 0 */
DISPLAYLEVEL(3, "LZ4F_compressBound(0) = ");
{ size_t const cBound = LZ4F_compressBound(0, NULL);
if (cBound < 64 KB) goto _output_error;
DISPLAYLEVEL(3, " %u \n", (U32)cBound);
}
/* LZ4F_compressBound() : special case : automatic flushing enabled */
DISPLAYLEVEL(3, "LZ4F_compressBound(1 KB, autoFlush=1) = ");
{ size_t cBound;
LZ4F_preferences_t autoFlushPrefs;
memset(&autoFlushPrefs, 0, sizeof(autoFlushPrefs));
autoFlushPrefs.autoFlush = 1;
cBound = LZ4F_compressBound(1 KB, &autoFlushPrefs);
if (cBound > 64 KB) goto _output_error;
DISPLAYLEVEL(3, " %u \n", (U32)cBound);
}
/* LZ4F_compressBound() : special case : automatic flushing disabled */
DISPLAYLEVEL(3, "LZ4F_compressBound(1 KB, autoFlush=0) = ");
{ size_t const cBound = LZ4F_compressBound(1 KB, &prefs);
if (cBound < 64 KB) goto _output_error;
DISPLAYLEVEL(3, " %u \n", (U32)cBound);
}
/* Special case : null-content frame */
testSize = 0;
DISPLAYLEVEL(3, "LZ4F_compressFrame, compress null content : ");
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, NULL), CNBuffer, testSize, NULL));
DISPLAYLEVEL(3, "null content encoded into a %u bytes frame \n", (unsigned)cSize);
DISPLAYLEVEL(3, "LZ4F_createDecompressionContext \n");
CHECK ( LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION) );
DISPLAYLEVEL(3, "LZ4F_getFrameInfo on null-content frame (#157) \n");
assert(cSize >= LZ4F_MIN_SIZE_TO_KNOW_HEADER_LENGTH);
{ LZ4F_frameInfo_t frame_info;
size_t const fhs = LZ4F_headerSize(compressedBuffer, LZ4F_MIN_SIZE_TO_KNOW_HEADER_LENGTH);
size_t avail_in = fhs;
CHECK( fhs );
CHECK( LZ4F_getFrameInfo(dCtx, &frame_info, compressedBuffer, &avail_in) );
if (avail_in != fhs) goto _output_error; /* must consume all, since header size is supposed to be exact */
}
DISPLAYLEVEL(3, "LZ4F_freeDecompressionContext \n");
CHECK( LZ4F_freeDecompressionContext(dCtx) );
dCtx = NULL;
/* test one-pass frame compression */
testSize = COMPRESSIBLE_NOISE_LENGTH;
DISPLAYLEVEL(3, "LZ4F_compressFrame, using fast level -3 : ");
{ LZ4F_preferences_t fastCompressPrefs;
memset(&fastCompressPrefs, 0, sizeof(fastCompressPrefs));
fastCompressPrefs.compressionLevel = -3;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, NULL), CNBuffer, testSize, &fastCompressPrefs));
DISPLAYLEVEL(3, "Compressed %u bytes into a %u bytes frame \n", (U32)testSize, (U32)cSize);
}
DISPLAYLEVEL(3, "LZ4F_compressFrame, using default preferences : ");
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, NULL), CNBuffer, testSize, NULL));
DISPLAYLEVEL(3, "Compressed %u bytes into a %u bytes frame \n", (U32)testSize, (U32)cSize);
DISPLAYLEVEL(3, "Decompression test : \n");
{ size_t decodedBufferSize = COMPRESSIBLE_NOISE_LENGTH;
size_t compressedBufferSize = cSize;
CHECK( LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION) );
DISPLAYLEVEL(3, "Single Pass decompression : ");
CHECK( LZ4F_decompress(dCtx, decodedBuffer, &decodedBufferSize, compressedBuffer, &compressedBufferSize, NULL) );
{ U64 const crcDest = XXH64(decodedBuffer, decodedBufferSize, 1);
if (crcDest != crcOrig) goto _output_error; }
DISPLAYLEVEL(3, "Regenerated %u bytes \n", (U32)decodedBufferSize);
DISPLAYLEVEL(3, "Reusing decompression context \n");
{ size_t const missingBytes = 4;
size_t iSize = compressedBufferSize - missingBytes;
const BYTE* cBuff = (const BYTE*) compressedBuffer;
BYTE* const ostart = (BYTE*)decodedBuffer;
BYTE* op = ostart;
BYTE* const oend = (BYTE*)decodedBuffer + COMPRESSIBLE_NOISE_LENGTH;
size_t decResult, oSize = COMPRESSIBLE_NOISE_LENGTH;
DISPLAYLEVEL(3, "Missing last %u bytes : ", (U32)missingBytes);
CHECK_V(decResult, LZ4F_decompress(dCtx, op, &oSize, cBuff, &iSize, NULL));
if (decResult != missingBytes) {
DISPLAY("%u bytes missing != %u bytes requested \n", (U32)missingBytes, (U32)decResult);
goto _output_error;
}
DISPLAYLEVEL(3, "indeed, requests %u bytes \n", (unsigned)decResult);
cBuff += iSize;
iSize = decResult;
op += oSize;
oSize = (size_t)(oend-op);
decResult = LZ4F_decompress(dCtx, op, &oSize, cBuff, &iSize, NULL);
if (decResult != 0) goto _output_error; /* should finish now */
op += oSize;
if (op>oend) { DISPLAY("decompression write overflow \n"); goto _output_error; }
{ U64 const crcDest = XXH64(decodedBuffer, (size_t)(op-ostart), 1);
if (crcDest != crcOrig) goto _output_error;
} }
{ size_t oSize = 0;
size_t iSize = 0;
LZ4F_frameInfo_t fi;
const BYTE* ip = (BYTE*)compressedBuffer;
DISPLAYLEVEL(3, "Start by feeding 0 bytes, to get next input size : ");
CHECK( LZ4F_decompress(dCtx, NULL, &oSize, ip, &iSize, NULL) );
//DISPLAYLEVEL(3, " %u \n", (unsigned)errorCode);
DISPLAYLEVEL(3, " OK \n");
DISPLAYLEVEL(3, "LZ4F_getFrameInfo on zero-size input : ");
{ size_t nullSize = 0;
size_t const fiError = LZ4F_getFrameInfo(dCtx, &fi, ip, &nullSize);
if (LZ4F_getErrorCode(fiError) != LZ4F_ERROR_frameHeader_incomplete) {
DISPLAYLEVEL(3, "incorrect error : %s != ERROR_frameHeader_incomplete \n",
LZ4F_getErrorName(fiError));
goto _output_error;
}
DISPLAYLEVEL(3, " correctly failed : %s \n", LZ4F_getErrorName(fiError));
}
DISPLAYLEVEL(3, "LZ4F_getFrameInfo on not enough input : ");
{ size_t inputSize = 6;
size_t const fiError = LZ4F_getFrameInfo(dCtx, &fi, ip, &inputSize);
if (LZ4F_getErrorCode(fiError) != LZ4F_ERROR_frameHeader_incomplete) {
DISPLAYLEVEL(3, "incorrect error : %s != ERROR_frameHeader_incomplete \n", LZ4F_getErrorName(fiError));
goto _output_error;
}
DISPLAYLEVEL(3, " correctly failed : %s \n", LZ4F_getErrorName(fiError));
}
DISPLAYLEVEL(3, "LZ4F_getFrameInfo on enough input : ");
iSize = LZ4F_headerSize(ip, LZ4F_MIN_SIZE_TO_KNOW_HEADER_LENGTH);
CHECK( iSize );
CHECK( LZ4F_getFrameInfo(dCtx, &fi, ip, &iSize) );
DISPLAYLEVEL(3, " correctly decoded \n");
}
DISPLAYLEVEL(3, "Decode a buggy input : ");
assert(COMPRESSIBLE_NOISE_LENGTH > 64);
assert(cSize > 48);
memcpy(decodedBuffer, (char*)compressedBuffer+16, 32); /* save correct data */
memcpy((char*)compressedBuffer+16, (const char*)decodedBuffer+32, 32); /* insert noise */
{ size_t dbSize = COMPRESSIBLE_NOISE_LENGTH;
size_t cbSize = cSize;
size_t const decompressError = LZ4F_decompress(dCtx, decodedBuffer, &dbSize,
compressedBuffer, &cbSize,
NULL);
if (!LZ4F_isError(decompressError)) goto _output_error;
DISPLAYLEVEL(3, "error detected : %s \n", LZ4F_getErrorName(decompressError));
}
memcpy((char*)compressedBuffer+16, decodedBuffer, 32); /* restore correct data */
DISPLAYLEVEL(3, "Reset decompression context, since it's left in error state \n");
LZ4F_resetDecompressionContext(dCtx); /* always successful */
DISPLAYLEVEL(3, "Byte after byte : ");
{ BYTE* const ostart = (BYTE*)decodedBuffer;
BYTE* op = ostart;
BYTE* const oend = (BYTE*)decodedBuffer + COMPRESSIBLE_NOISE_LENGTH;
const BYTE* ip = (const BYTE*) compressedBuffer;
const BYTE* const iend = ip + cSize;
while (ip < iend) {
size_t oSize = (size_t)(oend-op);
size_t iSize = 1;
CHECK( LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL) );
op += oSize;
ip += iSize;
}
{ U64 const crcDest = XXH64(decodedBuffer, COMPRESSIBLE_NOISE_LENGTH, 1);
if (crcDest != crcOrig) goto _output_error;
}
DISPLAYLEVEL(3, "Regenerated %u/%u bytes \n", (unsigned)(op-ostart), (unsigned)COMPRESSIBLE_NOISE_LENGTH);
}
}
DISPLAYLEVEL(3, "Using 64 KB block : ");
prefs.frameInfo.blockSizeID = LZ4F_max64KB;
prefs.frameInfo.contentChecksumFlag = LZ4F_contentChecksumEnabled;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs));
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "without checksum : ");
prefs.frameInfo.contentChecksumFlag = LZ4F_noContentChecksum;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs));
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "Using 256 KB block : ");
prefs.frameInfo.blockSizeID = LZ4F_max256KB;
prefs.frameInfo.contentChecksumFlag = LZ4F_contentChecksumEnabled;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs));
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "Decompression test : \n");
{ size_t const decodedBufferSize = COMPRESSIBLE_NOISE_LENGTH;
unsigned const maxBits = FUZ_highbit((U32)decodedBufferSize);
BYTE* const ostart = (BYTE*)decodedBuffer;
BYTE* op = ostart;
BYTE* const oend = ostart + COMPRESSIBLE_NOISE_LENGTH;
const BYTE* ip = (const BYTE*)compressedBuffer;
const BYTE* const iend = (const BYTE*)compressedBuffer + cSize;
DISPLAYLEVEL(3, "random segment sizes : ");
while (ip < iend) {
unsigned const nbBits = FUZ_rand(&randState) % maxBits;
size_t iSize = (FUZ_rand(&randState) & ((1<<nbBits)-1)) + 1;
size_t oSize = (size_t)(oend-op);
if (iSize > (size_t)(iend-ip)) iSize = (size_t)(iend-ip);
CHECK( LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL) );
op += oSize;
ip += iSize;
}
{ size_t const decodedSize = (size_t)(op - ostart);
U64 const crcDest = XXH64(decodedBuffer, decodedSize, 1);
if (crcDest != crcOrig) goto _output_error;
DISPLAYLEVEL(3, "Regenerated %u bytes \n", (U32)decodedSize);
}
CHECK( LZ4F_freeDecompressionContext(dCtx) );
dCtx = NULL;
}
DISPLAYLEVEL(3, "without checksum : ");
prefs.frameInfo.contentChecksumFlag = LZ4F_noContentChecksum;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs) );
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "Using 1 MB block : ");
prefs.frameInfo.blockSizeID = LZ4F_max1MB;
prefs.frameInfo.contentChecksumFlag = LZ4F_contentChecksumEnabled;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs) );
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "without frame checksum : ");
prefs.frameInfo.contentChecksumFlag = LZ4F_noContentChecksum;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs) );
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "Using 4 MB block : ");
prefs.frameInfo.blockSizeID = LZ4F_max4MB;
prefs.frameInfo.contentChecksumFlag = LZ4F_contentChecksumEnabled;
{ size_t const dstCapacity = LZ4F_compressFrameBound(testSize, &prefs);
DISPLAYLEVEL(4, "dstCapacity = %u ; ", (U32)dstCapacity)
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, dstCapacity, CNBuffer, testSize, &prefs) );
DISPLAYLEVEL(3, "Compressed %u bytes into a %u bytes frame \n", (U32)testSize, (U32)cSize);
}
DISPLAYLEVEL(3, "without frame checksum : ");
prefs.frameInfo.contentChecksumFlag = LZ4F_noContentChecksum;
{ size_t const dstCapacity = LZ4F_compressFrameBound(testSize, &prefs);
DISPLAYLEVEL(4, "dstCapacity = %u ; ", (U32)dstCapacity)
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, dstCapacity, CNBuffer, testSize, &prefs) );
DISPLAYLEVEL(3, "Compressed %u bytes into a %u bytes frame \n", (U32)testSize, (U32)cSize);
}
DISPLAYLEVEL(3, "LZ4F_compressFrame with block checksum : ");
memset(&prefs, 0, sizeof(prefs));
prefs.frameInfo.blockChecksumFlag = LZ4F_blockChecksumEnabled;
CHECK_V(cSize, LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(testSize, &prefs), CNBuffer, testSize, &prefs) );
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
DISPLAYLEVEL(3, "Decompress with block checksum : ");
{ size_t iSize = cSize;
size_t decodedSize = COMPRESSIBLE_NOISE_LENGTH;
LZ4F_decompressionContext_t dctx;
CHECK( LZ4F_createDecompressionContext(&dctx, LZ4F_VERSION) );
CHECK( LZ4F_decompress(dctx, decodedBuffer, &decodedSize, compressedBuffer, &iSize, NULL) );
if (decodedSize != testSize) goto _output_error;
if (iSize != cSize) goto _output_error;
{ U64 const crcDest = XXH64(decodedBuffer, decodedSize, 1);
U64 const crcSrc = XXH64(CNBuffer, testSize, 1);
if (crcDest != crcSrc) goto _output_error;
}
DISPLAYLEVEL(3, "Regenerated %u bytes \n", (U32)decodedSize);
CHECK( LZ4F_freeDecompressionContext(dctx) );
}
/* frame content size tests */
{ size_t cErr;
BYTE* const ostart = (BYTE*)compressedBuffer;
BYTE* op = ostart;
CHECK( LZ4F_createCompressionContext(&cctx, LZ4F_VERSION) );
DISPLAYLEVEL(3, "compress without frameSize : ");
memset(&(prefs.frameInfo), 0, sizeof(prefs.frameInfo));
CHECK_V(cErr, LZ4F_compressBegin(cctx, compressedBuffer, testSize, &prefs));
op += cErr;
CHECK_V(cErr, LZ4F_compressUpdate(cctx, op, LZ4F_compressBound(testSize, &prefs), CNBuffer, testSize, NULL));
op += cErr;
CHECK( LZ4F_compressEnd(cctx, compressedBuffer, testSize, NULL) );
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)(op-ostart));
DISPLAYLEVEL(3, "compress with frameSize : ");
prefs.frameInfo.contentSize = testSize;
op = ostart;
CHECK_V(cErr, LZ4F_compressBegin(cctx, compressedBuffer, testSize, &prefs));
op += cErr;
CHECK_V(cErr, LZ4F_compressUpdate(cctx, op, LZ4F_compressBound(testSize, &prefs), CNBuffer, testSize, NULL));
op += cErr;
CHECK( LZ4F_compressEnd(cctx, compressedBuffer, testSize, NULL) );
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)(op-ostart));
DISPLAYLEVEL(3, "compress with wrong frameSize : ");
prefs.frameInfo.contentSize = testSize+1;
op = ostart;
CHECK_V(cErr, LZ4F_compressBegin(cctx, compressedBuffer, testSize, &prefs));
op += cErr;
CHECK_V(cErr, LZ4F_compressUpdate(cctx, op, LZ4F_compressBound(testSize, &prefs), CNBuffer, testSize, NULL));
op += cErr;
cErr = LZ4F_compressEnd(cctx, op, testSize, NULL);
if (!LZ4F_isError(cErr)) goto _output_error;
DISPLAYLEVEL(3, "Error correctly detected : %s \n", LZ4F_getErrorName(cErr));
CHECK( LZ4F_freeCompressionContext(cctx) );
cctx = NULL;
}
/* dictID tests */
{ size_t cErr;
U32 const dictID = 0x99;
CHECK( LZ4F_createCompressionContext(&cctx, LZ4F_VERSION) );
DISPLAYLEVEL(3, "insert a dictID : ");
memset(&prefs.frameInfo, 0, sizeof(prefs.frameInfo));
prefs.frameInfo.dictID = dictID;
CHECK_V(cErr, LZ4F_compressBegin(cctx, compressedBuffer, testSize, &prefs));
DISPLAYLEVEL(3, "created frame header of size %i bytes \n", (int)cErr);
DISPLAYLEVEL(3, "read a dictID : ");
CHECK( LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION) );
memset(&prefs.frameInfo, 0, sizeof(prefs.frameInfo));
CHECK( LZ4F_getFrameInfo(dCtx, &prefs.frameInfo, compressedBuffer, &cErr) );
if (prefs.frameInfo.dictID != dictID) goto _output_error;
DISPLAYLEVEL(3, "%u \n", (U32)prefs.frameInfo.dictID);
CHECK( LZ4F_freeDecompressionContext(dCtx) ); dCtx = NULL;
CHECK( LZ4F_freeCompressionContext(cctx) ); cctx = NULL;
}
/* Dictionary compression test */
{ size_t const dictSize = 63 KB;
size_t const dstCapacity = LZ4F_compressFrameBound(dictSize, NULL);
size_t cSizeNoDict, cSizeWithDict;
LZ4F_CDict* const cdict = LZ4F_createCDict(CNBuffer, dictSize);
if (cdict == NULL) goto _output_error;
CHECK( LZ4F_createCompressionContext(&cctx, LZ4F_VERSION) );
DISPLAYLEVEL(3, "LZ4F_compressFrame_usingCDict, with NULL dict : ");
CHECK_V(cSizeNoDict,
LZ4F_compressFrame_usingCDict(cctx, compressedBuffer, dstCapacity,
CNBuffer, dictSize,
NULL, NULL) );
DISPLAYLEVEL(3, "%u bytes \n", (unsigned)cSizeNoDict);
CHECK( LZ4F_freeCompressionContext(cctx) );
CHECK( LZ4F_createCompressionContext(&cctx, LZ4F_VERSION) );
DISPLAYLEVEL(3, "LZ4F_compressFrame_usingCDict, with dict : ");
CHECK_V(cSizeWithDict,
LZ4F_compressFrame_usingCDict(cctx, compressedBuffer, dstCapacity,
CNBuffer, dictSize,
cdict, NULL) );
DISPLAYLEVEL(3, "compressed %u bytes into %u bytes \n",
(unsigned)dictSize, (unsigned)cSizeWithDict);
if ((LZ4_DISTANCE_MAX > dictSize) && (cSizeWithDict >= cSizeNoDict)) goto _output_error; /* must be more efficient */
crcOrig = XXH64(CNBuffer, dictSize, 0);
DISPLAYLEVEL(3, "LZ4F_decompress_usingDict : ");
{ LZ4F_dctx* dctx;
size_t decodedSize = COMPRESSIBLE_NOISE_LENGTH;
size_t compressedSize = cSizeWithDict;
CHECK( LZ4F_createDecompressionContext(&dctx, LZ4F_VERSION) );
CHECK( LZ4F_decompress_usingDict(dctx,
decodedBuffer, &decodedSize,
compressedBuffer, &compressedSize,
CNBuffer, dictSize,
NULL) );
if (compressedSize != cSizeWithDict) goto _output_error;
if (decodedSize != dictSize) goto _output_error;
{ U64 const crcDest = XXH64(decodedBuffer, decodedSize, 0);
if (crcDest != crcOrig) goto _output_error; }
DISPLAYLEVEL(3, "Regenerated %u bytes \n", (U32)decodedSize);
CHECK( LZ4F_freeDecompressionContext(dctx) );
}
DISPLAYLEVEL(3, "LZ4F_compressFrame_usingCDict, with dict, negative level : ");
{ size_t cSizeLevelMax;
LZ4F_preferences_t cParams;
memset(&cParams, 0, sizeof(cParams));
cParams.compressionLevel = -3;
CHECK_V(cSizeLevelMax,
LZ4F_compressFrame_usingCDict(cctx, compressedBuffer, dstCapacity,
CNBuffer, dictSize,
cdict, &cParams) );
DISPLAYLEVEL(3, "%u bytes \n", (unsigned)cSizeLevelMax);
}
DISPLAYLEVEL(3, "LZ4F_compressFrame_usingCDict, with dict, level max : ");
{ size_t cSizeLevelMax;
LZ4F_preferences_t cParams;
memset(&cParams, 0, sizeof(cParams));
cParams.compressionLevel = LZ4F_compressionLevel_max();
CHECK_V(cSizeLevelMax,
LZ4F_compressFrame_usingCDict(cctx, compressedBuffer, dstCapacity,
CNBuffer, dictSize,
cdict, &cParams) );
DISPLAYLEVEL(3, "%u bytes \n", (unsigned)cSizeLevelMax);
}
DISPLAYLEVEL(3, "LZ4F_compressFrame_usingCDict, multiple linked blocks : ");
{ size_t cSizeContiguous;
size_t const inSize = dictSize * 3;
size_t const outCapacity = LZ4F_compressFrameBound(inSize, NULL);
LZ4F_preferences_t cParams;
memset(&cParams, 0, sizeof(cParams));
cParams.frameInfo.blockMode = LZ4F_blockLinked;
cParams.frameInfo.blockSizeID = LZ4F_max64KB;
CHECK_V(cSizeContiguous,
LZ4F_compressFrame_usingCDict(cctx, compressedBuffer, outCapacity,
CNBuffer, inSize,
cdict, &cParams) );
DISPLAYLEVEL(3, "compressed %u bytes into %u bytes \n",
(unsigned)inSize, (unsigned)cSizeContiguous);
DISPLAYLEVEL(3, "LZ4F_decompress_usingDict on multiple linked blocks : ");
{ LZ4F_dctx* dctx;
size_t decodedSize = COMPRESSIBLE_NOISE_LENGTH;
size_t compressedSize = cSizeContiguous;
CHECK( LZ4F_createDecompressionContext(&dctx, LZ4F_VERSION) );
CHECK( LZ4F_decompress_usingDict(dctx,
decodedBuffer, &decodedSize,
compressedBuffer, &compressedSize,
CNBuffer, dictSize,
NULL) );
if (compressedSize != cSizeContiguous) goto _output_error;
if (decodedSize != inSize) goto _output_error;
crcOrig = XXH64(CNBuffer, inSize, 0);
{ U64 const crcDest = XXH64(decodedBuffer, decodedSize, 0);
if (crcDest != crcOrig) goto _output_error; }
DISPLAYLEVEL(3, "Regenerated %u bytes \n", (U32)decodedSize);
CHECK( LZ4F_freeDecompressionContext(dctx) );
}
}
DISPLAYLEVEL(3, "LZ4F_compressFrame_usingCDict, multiple independent blocks : ");
{ size_t cSizeIndep;
size_t const inSize = dictSize * 3;
size_t const outCapacity = LZ4F_compressFrameBound(inSize, NULL);
LZ4F_preferences_t cParams;
memset(&cParams, 0, sizeof(cParams));
cParams.frameInfo.blockMode = LZ4F_blockIndependent;
cParams.frameInfo.blockSizeID = LZ4F_max64KB;
CHECK_V(cSizeIndep,
LZ4F_compressFrame_usingCDict(cctx, compressedBuffer, outCapacity,
CNBuffer, inSize,
cdict, &cParams) );
DISPLAYLEVEL(3, "compressed %u bytes into %u bytes \n",
(unsigned)inSize, (unsigned)cSizeIndep);
DISPLAYLEVEL(3, "LZ4F_decompress_usingDict on multiple independent blocks : ");
{ LZ4F_dctx* dctx;
size_t decodedSize = COMPRESSIBLE_NOISE_LENGTH;
size_t compressedSize = cSizeIndep;
CHECK( LZ4F_createDecompressionContext(&dctx, LZ4F_VERSION) );
CHECK( LZ4F_decompress_usingDict(dctx,
decodedBuffer, &decodedSize,
compressedBuffer, &compressedSize,
CNBuffer, dictSize,
NULL) );
if (compressedSize != cSizeIndep) goto _output_error;
if (decodedSize != inSize) goto _output_error;
crcOrig = XXH64(CNBuffer, inSize, 0);
{ U64 const crcDest = XXH64(decodedBuffer, decodedSize, 0);
if (crcDest != crcOrig) goto _output_error; }
DISPLAYLEVEL(3, "Regenerated %u bytes \n", (U32)decodedSize);
CHECK( LZ4F_freeDecompressionContext(dctx) );
}
}
LZ4F_freeCDict(cdict);
CHECK( LZ4F_freeCompressionContext(cctx) ); cctx = NULL;
}
DISPLAYLEVEL(3, "getBlockSize test: \n");
{ size_t result;
unsigned blockSizeID;
for (blockSizeID = 4; blockSizeID < 8; ++blockSizeID) {
result = LZ4F_getBlockSize(blockSizeID);
CHECK(result);
DISPLAYLEVEL(3, "Returned block size of %u bytes for blockID %u \n",
(unsigned)result, blockSizeID);
}
/* Test an invalid input that's too large */
result = LZ4F_getBlockSize(8);
if(!LZ4F_isError(result) ||
LZ4F_getErrorCode(result) != LZ4F_ERROR_maxBlockSize_invalid)
goto _output_error;
/* Test an invalid input that's too small */
result = LZ4F_getBlockSize(3);
if(!LZ4F_isError(result) ||
LZ4F_getErrorCode(result) != LZ4F_ERROR_maxBlockSize_invalid)
goto _output_error;
}
DISPLAYLEVEL(3, "Skippable frame test : \n");
{ size_t decodedBufferSize = COMPRESSIBLE_NOISE_LENGTH;
unsigned maxBits = FUZ_highbit((U32)decodedBufferSize);
BYTE* op = (BYTE*)decodedBuffer;
BYTE* const oend = (BYTE*)decodedBuffer + COMPRESSIBLE_NOISE_LENGTH;
BYTE* ip = (BYTE*)compressedBuffer;
BYTE* iend = (BYTE*)compressedBuffer + cSize + 8;
CHECK( LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION) );
/* generate skippable frame */
FUZ_writeLE32(ip, LZ4F_MAGIC_SKIPPABLE_START);
FUZ_writeLE32(ip+4, (U32)cSize);
DISPLAYLEVEL(3, "random segment sizes : \n");
while (ip < iend) {
unsigned nbBits = FUZ_rand(&randState) % maxBits;
size_t iSize = (FUZ_rand(&randState) & ((1<<nbBits)-1)) + 1;
size_t oSize = (size_t)(oend-op);
if (iSize > (size_t)(iend-ip)) iSize = (size_t)(iend-ip);
CHECK( LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL) );
op += oSize;
ip += iSize;
}
DISPLAYLEVEL(3, "Skipped %i bytes \n", (int)decodedBufferSize);
/* generate zero-size skippable frame */
DISPLAYLEVEL(3, "zero-size skippable frame\n");
ip = (BYTE*)compressedBuffer;
op = (BYTE*)decodedBuffer;
FUZ_writeLE32(ip, LZ4F_MAGIC_SKIPPABLE_START+1);
FUZ_writeLE32(ip+4, 0);
iend = ip+8;
while (ip < iend) {
unsigned const nbBits = FUZ_rand(&randState) % maxBits;
size_t iSize = (FUZ_rand(&randState) & ((1<<nbBits)-1)) + 1;
size_t oSize = (size_t)(oend-op);
if (iSize > (size_t)(iend-ip)) iSize = (size_t)(iend-ip);
CHECK( LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL) );
op += oSize;
ip += iSize;
}
DISPLAYLEVEL(3, "Skipped %i bytes \n", (int)(ip - (BYTE*)compressedBuffer - 8));
DISPLAYLEVEL(3, "Skippable frame header complete in first call \n");
ip = (BYTE*)compressedBuffer;
op = (BYTE*)decodedBuffer;
FUZ_writeLE32(ip, LZ4F_MAGIC_SKIPPABLE_START+2);
FUZ_writeLE32(ip+4, 10);
iend = ip+18;
while (ip < iend) {
size_t iSize = 10;
size_t oSize = 10;
if (iSize > (size_t)(iend-ip)) iSize = (size_t)(iend-ip);
CHECK( LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL) );
op += oSize;
ip += iSize;
}
DISPLAYLEVEL(3, "Skipped %i bytes \n", (int)(ip - (BYTE*)compressedBuffer - 8));
}
DISPLAY("Basic tests completed \n");
_end:
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
LZ4F_freeDecompressionContext(dCtx); dCtx = NULL;
LZ4F_freeCompressionContext(cctx); cctx = NULL;
return basicTests_error;
_output_error:
basicTests_error = 1;
DISPLAY("Error detected ! \n");
goto _end;
}
typedef enum { o_contiguous, o_noncontiguous, o_overwrite } o_scenario_e;
static void locateBuffDiff(const void* buff1, const void* buff2, size_t size, o_scenario_e o_scenario)
{
if (displayLevel >= 2) {
size_t p=0;
const BYTE* b1=(const BYTE*)buff1;
const BYTE* b2=(const BYTE*)buff2;
DISPLAY("locateBuffDiff: looking for error position \n");
if (o_scenario != o_contiguous) {
DISPLAY("mode %i: non-contiguous output (%u bytes), cannot search \n",
(int)o_scenario, (unsigned)size);
return;
}
while (p < size && b1[p]==b2[p]) p++;
if (p != size) {
DISPLAY("Error at pos %i/%i : %02X != %02X \n", (int)p, (int)size, b1[p], b2[p]);
}
}
}
# define EXIT_MSG(...) { DISPLAY("Error => "); DISPLAY(__VA_ARGS__); \
DISPLAY(" (seed %u, test nb %u) \n", seed, testNb); exit(1); }
# undef CHECK
# define CHECK(cond, ...) { if (cond) { EXIT_MSG(__VA_ARGS__); } }
size_t test_lz4f_decompression_wBuffers(
const void* cSrc, size_t cSize,
void* dst, size_t dstCapacity, o_scenario_e o_scenario,
const void* srcRef, size_t decompressedSize,
U64 crcOrig,
U32* const randState,
LZ4F_dctx* const dCtx,
U32 seed, U32 testNb,
int findErrorPos)
{
const BYTE* ip = (const BYTE*)cSrc;
const BYTE* const iend = ip + cSize;
BYTE* op = (BYTE*)dst;
BYTE* const oend = op + dstCapacity;
unsigned const suggestedBits = FUZ_highbit((U32)cSize);
unsigned const maxBits = MAX(3, suggestedBits);
size_t totalOut = 0;
size_t moreToFlush = 0;
XXH64_state_t xxh64;
XXH64_reset(&xxh64, 1);
assert(ip < iend);
while (ip < iend) {
unsigned const nbBitsI = (FUZ_rand(randState) % (maxBits-1)) + 1;
unsigned const nbBitsO = (FUZ_rand(randState) % (maxBits)) + 1;
size_t const iSizeCand = (FUZ_rand(randState) & ((1<<nbBitsI)-1)) + 1;
size_t const iSizeMax = MIN(iSizeCand, (size_t)(iend-ip));
size_t iSize = iSizeMax;
size_t const oSizeCand = (FUZ_rand(randState) & ((1<<nbBitsO)-1)) + 2;
size_t const oSizeMax = MIN(oSizeCand, (size_t)(oend-op));
int const sentinelTest = (op + oSizeMax < oend);
size_t oSize = oSizeMax;
BYTE const mark = (BYTE)(FUZ_rand(randState) & 255);
LZ4F_decompressOptions_t dOptions;
memset(&dOptions, 0, sizeof(dOptions));
dOptions.stableDst = FUZ_rand(randState) & 1;
if (o_scenario == o_overwrite) dOptions.stableDst = 0; /* overwrite mode */
if (sentinelTest) op[oSizeMax] = mark;
DISPLAYLEVEL(7, "dstCapacity=%u, presentedInput=%u \n", (unsigned)oSize, (unsigned)iSize);
/* read data from byte-exact buffer to catch out-of-bound reads */
{ void* const iBuffer = malloc(iSizeMax);
void* const tmpop = (FUZ_rand(randState) & (oSize == 0)) ? NULL : op;
const void* const tmpip = (FUZ_rand(randState) & (iSize == 0)) ? NULL : iBuffer;
assert(iBuffer != NULL);
memcpy(iBuffer, ip, iSizeMax);
moreToFlush = LZ4F_decompress(dCtx, tmpop, &oSize, tmpip, &iSize, &dOptions);
free(iBuffer);
}
DISPLAYLEVEL(7, "oSize=%u, readSize=%u \n", (unsigned)oSize, (unsigned)iSize);
if (sentinelTest) {
CHECK(op[oSizeMax] != mark, "op[oSizeMax] = %02X != %02X : "
"Decompression overwrites beyond assigned dst size",
op[oSizeMax], mark);
}
if (LZ4F_getErrorCode(moreToFlush) == LZ4F_ERROR_contentChecksum_invalid) {
if (findErrorPos) DISPLAYLEVEL(2, "checksum error detected \n");
if (findErrorPos) locateBuffDiff(srcRef, dst, decompressedSize, o_scenario);
}
if (LZ4F_isError(moreToFlush)) return moreToFlush;
XXH64_update(&xxh64, op, oSize);
totalOut += oSize;
op += oSize;
ip += iSize;
if (o_scenario == o_noncontiguous) {
if (op == oend) return LZ4F_ERROR_GENERIC; /* can theoretically happen with bogus data */
op++; /* create a gap between consecutive output */
}
if (o_scenario==o_overwrite) op = (BYTE*)dst; /* overwrite destination */
if ( (op == oend) /* no more room for output; can happen with bogus input */
&& (iSize == 0)) /* no input consumed */
break;
}
if (moreToFlush != 0) return LZ4F_ERROR_decompressionFailed;
if (totalOut) { /* otherwise, it's a skippable frame */
U64 const crcDecoded = XXH64_digest(&xxh64);
if (crcDecoded != crcOrig) {
if (findErrorPos) locateBuffDiff(srcRef, dst, decompressedSize, o_scenario);
return LZ4F_ERROR_contentChecksum_invalid;
} }
return 0;
}
size_t test_lz4f_decompression(const void* cSrc, size_t cSize,
const void* srcRef, size_t decompressedSize,
U64 crcOrig,
U32* const randState,
LZ4F_dctx* const dCtx,
U32 seed, U32 testNb,
int findErrorPos)
{
o_scenario_e const o_scenario = (o_scenario_e)(FUZ_rand(randState) % 3); /* 0 : contiguous; 1 : non-contiguous; 2 : dst overwritten */
/* tighten dst buffer conditions */
size_t const dstCapacity = (o_scenario == o_noncontiguous) ?
(decompressedSize * 2) + 128 :
decompressedSize;
size_t result;
void* const dstBuffer = malloc(dstCapacity);
assert(dstBuffer != NULL);
result = test_lz4f_decompression_wBuffers(cSrc, cSize,
dstBuffer, dstCapacity, o_scenario,
srcRef, decompressedSize,
crcOrig,
randState,
dCtx,
seed, testNb, findErrorPos);
free(dstBuffer);
return result;
}
int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressibility, U32 duration_s)
{
unsigned testNb = 0;
size_t const CNBufferLength = 9 MB; /* needs to be > 2x4MB to test large blocks */
void* CNBuffer = NULL;
size_t const compressedBufferSize = LZ4F_compressFrameBound(CNBufferLength, NULL) + 4 MB; /* needs some margin */
void* compressedBuffer = NULL;
void* decodedBuffer = NULL;
U32 coreRand = seed;
LZ4F_decompressionContext_t dCtx = NULL;
LZ4F_decompressionContext_t dCtxNoise = NULL;
LZ4F_compressionContext_t cCtx = NULL;
clock_t const startClock = clock();
clock_t const clockDuration = duration_s * CLOCKS_PER_SEC;
/* Create buffers */
{ size_t const creationStatus = LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION);
CHECK(LZ4F_isError(creationStatus), "Allocation failed (error %i)", (int)creationStatus); }
{ size_t const creationStatus = LZ4F_createDecompressionContext(&dCtxNoise, LZ4F_VERSION);
CHECK(LZ4F_isError(creationStatus), "Allocation failed (error %i)", (int)creationStatus); }
{ size_t const creationStatus = LZ4F_createCompressionContext(&cCtx, LZ4F_VERSION);
CHECK(LZ4F_isError(creationStatus), "Allocation failed (error %i)", (int)creationStatus); }
CNBuffer = malloc(CNBufferLength);
CHECK(CNBuffer==NULL, "CNBuffer Allocation failed");
compressedBuffer = malloc(compressedBufferSize);
CHECK(compressedBuffer==NULL, "compressedBuffer Allocation failed");
decodedBuffer = calloc(1, CNBufferLength); /* calloc avoids decodedBuffer being considered "garbage" by scan-build */
CHECK(decodedBuffer==NULL, "decodedBuffer Allocation failed");
FUZ_fillCompressibleNoiseBuffer(CNBuffer, CNBufferLength, compressibility, &coreRand);
/* jump to requested testNb */
for (testNb =0; (testNb < startTest); testNb++) (void)FUZ_rand(&coreRand); /* sync randomizer */
/* main fuzzer test loop */
for ( ; (testNb < nbTests) || (clockDuration > FUZ_GetClockSpan(startClock)) ; testNb++) {
U32 randState = coreRand ^ prime1;
unsigned const srcBits = (FUZ_rand(&randState) % (FUZ_highbit((U32)(CNBufferLength-1)) - 1)) + 1;
size_t const srcSize = (FUZ_rand(&randState) & ((1<<srcBits)-1)) + 1;
size_t const srcStartId = FUZ_rand(&randState) % (CNBufferLength - srcSize);
const BYTE* const srcStart = (const BYTE*)CNBuffer + srcStartId;
unsigned const neverFlush = (FUZ_rand(&randState) & 15) == 1;
U64 const crcOrig = XXH64(srcStart, srcSize, 1);
LZ4F_preferences_t prefs;
const LZ4F_preferences_t* prefsPtr = &prefs;
size_t cSize;
(void)FUZ_rand(&coreRand); /* update seed */
memset(&prefs, 0, sizeof(prefs));
prefs.frameInfo.blockMode = (LZ4F_blockMode_t)(FUZ_rand(&randState) & 1);
prefs.frameInfo.blockSizeID = (LZ4F_blockSizeID_t)(4 + (FUZ_rand(&randState) & 3));
prefs.frameInfo.blockChecksumFlag = (LZ4F_blockChecksum_t)(FUZ_rand(&randState) & 1);
prefs.frameInfo.contentChecksumFlag = (LZ4F_contentChecksum_t)(FUZ_rand(&randState) & 1);
prefs.frameInfo.contentSize = ((FUZ_rand(&randState) & 0xF) == 1) ? srcSize : 0;
prefs.autoFlush = neverFlush ? 0 : (FUZ_rand(&randState) & 7) == 2;
prefs.compressionLevel = -5 + (int)(FUZ_rand(&randState) % 11);
if ((FUZ_rand(&randState) & 0xF) == 1) prefsPtr = NULL;
DISPLAYUPDATE(2, "\r%5u ", testNb);
if ((FUZ_rand(&randState) & 0xFFF) == 0) {
/* create a skippable frame (rare case) */
BYTE* op = (BYTE*)compressedBuffer;
FUZ_writeLE32(op, LZ4F_MAGIC_SKIPPABLE_START + (FUZ_rand(&randState) & 15));
FUZ_writeLE32(op+4, (U32)srcSize);
cSize = srcSize+8;
} else if ((FUZ_rand(&randState) & 0xF) == 2) { /* single pass compression (simple) */
cSize = LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(srcSize, prefsPtr), srcStart, srcSize, prefsPtr);
CHECK(LZ4F_isError(cSize), "LZ4F_compressFrame failed : error %i (%s)", (int)cSize, LZ4F_getErrorName(cSize));
} else { /* multi-segments compression */
const BYTE* ip = srcStart;
const BYTE* const iend = srcStart + srcSize;
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);
LZ4F_compressOptions_t cOptions;
memset(&cOptions, 0, sizeof(cOptions));
{ 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;
size_t const iSize = MIN(sampleMax, (size_t)(iend-ip));
size_t const oSize = LZ4F_compressBound(iSize, prefsPtr);
size_t flushedSize;
cOptions.stableSrc = ((FUZ_rand(&randState) & 3) == 1);
DISPLAYLEVEL(6, "Sending %u bytes to compress (stableSrc:%u) \n",
(unsigned)iSize, cOptions.stableSrc);
flushedSize = LZ4F_compressUpdate(cCtx, op, oSize, ip, iSize, &cOptions);
CHECK(LZ4F_isError(flushedSize), "Compression failed (error %i : %s)",
(int)flushedSize, LZ4F_getErrorName(flushedSize));
op += flushedSize;
ip += iSize;
{ unsigned const forceFlush = neverFlush ? 0 : ((FUZ_rand(&randState) & 3) == 1);
if (forceFlush) {
size_t const flushSize = LZ4F_flush(cCtx, op, (size_t)(oend-op), &cOptions);
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);
size_t const dstEndTooSmallSize = (FUZ_rand(&randState) % dstEndSafeSize) + 1;
size_t const dstEndSize = tooSmallDstEnd ? dstEndTooSmallSize : dstEndSafeSize;
BYTE const canaryByte = (BYTE)(FUZ_rand(&randState) & 255);
size_t flushedSize;
DISPLAYLEVEL(7,"canaryByte at pos %u / %u \n",
(unsigned)((size_t)(op - (BYTE*)compressedBuffer) + dstEndSize),
(unsigned)compressedBufferSize);
assert(op + dstEndSize < (BYTE*)compressedBuffer + compressedBufferSize);
op[dstEndSize] = canaryByte;
flushedSize = LZ4F_compressEnd(cCtx, op, dstEndSize, &cOptions);
CHECK(op[dstEndSize] != canaryByte, "LZ4F_compressEnd writes beyond dstCapacity !");
if (LZ4F_isError(flushedSize)) {
if (tooSmallDstEnd) /* failure is allowed */ continue;
CHECK(!tooSmallDstEnd, "Compression completion failed (error %i : %s)",
(int)flushedSize, LZ4F_getErrorName(flushedSize));
}
op += flushedSize;
}
cSize = (size_t)(op - (BYTE*)compressedBuffer);
DISPLAYLEVEL(5, "\nCompressed %u bytes into %u \n", (U32)srcSize, (U32)cSize);
}
/* multi-segments decompression */
DISPLAYLEVEL(6, "normal decompression \n");
{ size_t result = test_lz4f_decompression(compressedBuffer, cSize, srcStart, srcSize, crcOrig, &randState, dCtx, seed, testNb, 1 /*findError*/ );
CHECK (LZ4F_isError(result), "multi-segment decompression failed (error %i => %s)",
(int)result, LZ4F_getErrorName(result));
}
#if 1
/* insert noise into src */
{ U32 const maxNbBits = FUZ_highbit((U32)cSize);
size_t pos = 0;
for (;;) {
/* keep some original src */
{ U32 const nbBits = FUZ_rand(&randState) % maxNbBits;
size_t const mask = (1<<nbBits) - 1;
size_t const skipLength = FUZ_rand(&randState) & mask;
pos += skipLength;
}
if (pos >= cSize) break;
/* add noise */
{ U32 const nbBitsCodes = FUZ_rand(&randState) % maxNbBits;
U32 const nbBits = nbBitsCodes ? nbBitsCodes-1 : 0;
size_t const mask = (1<<nbBits) - 1;
size_t const rNoiseLength = (FUZ_rand(&randState) & mask) + 1;
size_t const noiseLength = MIN(rNoiseLength, cSize-pos);
size_t const noiseStart = FUZ_rand(&randState) % (CNBufferLength - noiseLength);
memcpy((BYTE*)compressedBuffer + pos, (const char*)CNBuffer + noiseStart, noiseLength);
pos += noiseLength;
} } }
/* test decompression on noisy src */
DISPLAYLEVEL(6, "noisy decompression \n");
test_lz4f_decompression(compressedBuffer, cSize, srcStart, srcSize, crcOrig, &randState, dCtxNoise, seed, testNb, 0 /*don't search error Pos*/ );
/* note : we don't analyze result here : it probably failed, which is expected.
* 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) ; ) */
DISPLAYLEVEL(2, "\rAll tests completed \n");
LZ4F_freeDecompressionContext(dCtx);
LZ4F_freeDecompressionContext(dCtxNoise);
LZ4F_freeCompressionContext(cCtx);
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
if (use_pause) {
DISPLAY("press enter to finish \n");
(void)getchar();
}
return 0;
}
int FUZ_usage(const char* programName)
{
DISPLAY( "Usage :\n");
DISPLAY( " %s [args]\n", programName);
DISPLAY( "\n");
DISPLAY( "Arguments :\n");
DISPLAY( " -i# : Nb of tests (default:%u) \n", nbTestsDefault);
DISPLAY( " -T# : Duration of tests, in seconds (default: use Nb of tests) \n");
DISPLAY( " -s# : Select seed (default:prompt user)\n");
DISPLAY( " -t# : Select starting test number (default:0)\n");
DISPLAY( " -P# : Select compressibility in %% (default:%i%%)\n", FUZ_COMPRESSIBILITY_DEFAULT);
DISPLAY( " -v : verbose\n");
DISPLAY( " -h : display help and exit\n");
return 0;
}
int main(int argc, const char** argv)
{
U32 seed=0;
int seedset=0;
int argNb;
unsigned nbTests = nbTestsDefault;
unsigned testNb = 0;
int proba = FUZ_COMPRESSIBILITY_DEFAULT;
int result=0;
U32 duration=0;
const char* const programName = argv[0];
/* Check command line */
for (argNb=1; argNb<argc; argNb++) {
const char* argument = argv[argNb];
if(!argument) continue; /* Protection if argument empty */
/* Decode command (note : aggregated short commands are allowed) */
if (argument[0]=='-') {
if (!strcmp(argument, "--no-prompt")) {
no_prompt=1;
seedset=1;
displayLevel=1;
continue;
}
argument++;
while (*argument!=0) {
switch(*argument)
{
case 'h':
return FUZ_usage(programName);
case 'v':
argument++;
displayLevel++;
break;
case 'q':
argument++;
displayLevel--;
break;
case 'p': /* pause at the end */
argument++;
use_pause = 1;
break;
case 'i':
argument++;
nbTests=0; duration=0;
while ((*argument>='0') && (*argument<='9')) {
nbTests *= 10;
nbTests += (unsigned)(*argument - '0');
argument++;
}
break;
case 'T':
argument++;
nbTests = 0; duration = 0;
for (;;) {
switch(*argument)
{
case 'm': duration *= 60; argument++; continue;
case 's':
case 'n': argument++; continue;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': duration *= 10; duration += (U32)(*argument++ - '0'); continue;
}
break;
}
break;
case 's':
argument++;
seed=0;
seedset=1;
while ((*argument>='0') && (*argument<='9')) {
seed *= 10;
seed += (U32)(*argument - '0');
argument++;
}
break;
case 't':
argument++;
testNb=0;
while ((*argument>='0') && (*argument<='9')) {
testNb *= 10;
testNb += (unsigned)(*argument - '0');
argument++;
}
break;
case 'P': /* compressibility % */
argument++;
proba=0;
while ((*argument>='0') && (*argument<='9')) {
proba *= 10;
proba += *argument - '0';
argument++;
}
if (proba<0) proba=0;
if (proba>100) proba=100;
break;
default:
;
return FUZ_usage(programName);
}
}
}
}
/* Get Seed */
DISPLAY("Starting lz4frame tester (%i-bits, %s)\n", (int)(sizeof(size_t)*8), LZ4_VERSION_STRING);
if (!seedset) {
time_t const t = time(NULL);
U32 const h = XXH32(&t, sizeof(t), 1);
seed = h % 10000;
}
DISPLAY("Seed = %u\n", seed);
if (proba!=FUZ_COMPRESSIBILITY_DEFAULT) DISPLAY("Compressibility : %i%%\n", proba);
nbTests += (nbTests==0); /* avoid zero */
if (testNb==0) result = basicTests(seed, ((double)proba) / 100);
if (result) return 1;
return fuzzerTests(seed, nbTests, testNb, ((double)proba) / 100, duration);
}
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