mirror of
https://github.com/facebook/zstd.git
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562 lines
19 KiB
C
562 lines
19 KiB
C
/*
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Fuzzer test tool for zstd
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Copyright (C) Yann Collet 2014-2105
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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You can contact the author at :
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- ZSTD source repository : https://github.com/Cyan4973/zstd
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- ZSTD public forum : https://groups.google.com/forum/#!forum/lz4c
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*/
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/**************************************
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* Compiler specific
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**************************************/
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#ifdef _MSC_VER /* Visual Studio */
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# define _CRT_SECURE_NO_WARNINGS /* fgets */
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# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
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# pragma warning(disable : 4146) /* disable: C4146: minus unsigned expression */
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#endif
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#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
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#ifdef __GNUC__
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# pragma GCC diagnostic ignored "-Wmissing-braces" /* GCC bug 53119 : doesn't accept { 0 } as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */
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# pragma GCC diagnostic ignored "-Wmissing-field-initializers" /* GCC bug 53119 : doesn't accept { 0 } as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */
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#endif
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/**************************************
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* Includes
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**************************************/
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#include <stdlib.h> /* free */
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#include <stdio.h> /* fgets, sscanf */
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#include <sys/timeb.h> /* timeb */
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#include <string.h> /* strcmp */
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#include "zstd_static.h"
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#include "xxhash.h" /* XXH64 */
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/**************************************
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* Basic Types
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**************************************/
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#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */
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# include <stdint.h>
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typedef uint8_t BYTE;
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typedef uint16_t U16;
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typedef uint32_t U32;
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typedef int32_t S32;
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typedef uint64_t U64;
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#else
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typedef unsigned char BYTE;
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typedef unsigned short U16;
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typedef unsigned int U32;
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typedef signed int S32;
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typedef unsigned long long U64;
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#endif
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/**************************************
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Constants
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**************************************/
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#ifndef ZSTD_VERSION
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# define ZSTD_VERSION ""
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#endif
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#define KB *(1U<<10)
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#define MB *(1U<<20)
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#define GB *(1U<<30)
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static const U32 nbTestsDefault = 32 KB;
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#define COMPRESSIBLE_NOISE_LENGTH (10 MB)
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#define FUZ_COMPRESSIBILITY_DEFAULT 50
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static const U32 prime1 = 2654435761U;
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static const U32 prime2 = 2246822519U;
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/**************************************
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* Display Macros
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**************************************/
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#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
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#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
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static U32 g_displayLevel = 2;
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#define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
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if ((FUZ_GetMilliSpan(g_time) > g_refreshRate) || (g_displayLevel>=4)) \
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{ g_time = FUZ_GetMilliStart(); DISPLAY(__VA_ARGS__); \
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if (g_displayLevel>=4) fflush(stdout); } }
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static const U32 g_refreshRate = 150;
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static U32 g_time = 0;
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/*********************************************************
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* Fuzzer functions
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*********************************************************/
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static U32 FUZ_GetMilliStart(void)
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{
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struct timeb tb;
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U32 nCount;
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ftime( &tb );
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nCount = (U32) (((tb.time & 0xFFFFF) * 1000) + tb.millitm);
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return nCount;
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}
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static U32 FUZ_GetMilliSpan(U32 nTimeStart)
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{
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U32 nCurrent = FUZ_GetMilliStart();
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U32 nSpan = nCurrent - nTimeStart;
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if (nTimeStart > nCurrent)
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nSpan += 0x100000 * 1000;
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return nSpan;
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}
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# define FUZ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
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unsigned int FUZ_rand(unsigned int* src)
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{
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U32 rand32 = *src;
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rand32 *= prime1;
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rand32 += prime2;
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rand32 = FUZ_rotl32(rand32, 13);
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*src = rand32;
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return rand32 >> 5;
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}
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#define FUZ_RAND15BITS (FUZ_rand(seed) & 0x7FFF)
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#define FUZ_RANDLENGTH ( (FUZ_rand(seed) & 3) ? (FUZ_rand(seed) % 15) : (FUZ_rand(seed) % 510) + 15)
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static void FUZ_generateSynthetic(void* buffer, size_t bufferSize, double proba, U32* seed)
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{
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BYTE* BBuffer = (BYTE*)buffer;
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unsigned pos = 0;
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U32 P32 = (U32)(32768 * proba);
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// First Byte
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BBuffer[pos++] = (BYTE)((FUZ_rand(seed) & 0x3F) + '0');
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while (pos < bufferSize)
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{
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// Select : Literal (noise) or copy (within 64K)
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if (FUZ_RAND15BITS < P32)
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{
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// Copy (within 64K)
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size_t match, end;
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size_t length = FUZ_RANDLENGTH + 4;
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size_t offset = FUZ_RAND15BITS + 1;
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if (offset > pos) offset = pos;
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if (pos + length > bufferSize) length = bufferSize - pos;
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match = pos - offset;
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end = pos + length;
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while (pos < end) BBuffer[pos++] = BBuffer[match++];
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}
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else
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{
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// Literal (noise)
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size_t end;
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size_t length = FUZ_RANDLENGTH;
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if (pos + length > bufferSize) length = bufferSize - pos;
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end = pos + length;
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while (pos < end) BBuffer[pos++] = (BYTE)((FUZ_rand(seed) & 0x3F) + '0');
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}
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}
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}
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/*
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static unsigned FUZ_highbit(U32 v32)
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{
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unsigned nbBits = 0;
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if (v32==0) return 0;
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while (v32)
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{
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v32 >>= 1;
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nbBits ++;
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}
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return nbBits;
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}
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*/
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static int basicUnitTests(U32 seed, double compressibility)
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{
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int testResult = 0;
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void* CNBuffer;
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void* compressedBuffer;
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void* decodedBuffer;
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U32 randState = seed;
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size_t result, cSize;
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U32 testNb=0;
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// Create compressible test buffer
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CNBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
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compressedBuffer = malloc(ZSTD_compressBound(COMPRESSIBLE_NOISE_LENGTH));
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decodedBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
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if (!CNBuffer || !compressedBuffer || !decodedBuffer)
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{
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DISPLAY("Not enough memory, aborting\n");
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testResult = 1;
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goto _end;
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}
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FUZ_generateSynthetic(CNBuffer, COMPRESSIBLE_NOISE_LENGTH, compressibility, &randState);
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// Basic tests
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DISPLAYLEVEL(4, "test%3i : compress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
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result = ZSTD_compress(compressedBuffer, ZSTD_compressBound(COMPRESSIBLE_NOISE_LENGTH), CNBuffer, COMPRESSIBLE_NOISE_LENGTH);
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if (ZSTD_isError(result)) goto _output_error;
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cSize = result;
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DISPLAYLEVEL(4, "OK (%u bytes : %.2f%%)\n", (U32)cSize, (double)cSize/COMPRESSIBLE_NOISE_LENGTH*100);
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DISPLAYLEVEL(4, "test%3i : decompress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
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result = ZSTD_decompress(decodedBuffer, COMPRESSIBLE_NOISE_LENGTH, compressedBuffer, cSize);
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if (ZSTD_isError(result)) goto _output_error;
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DISPLAYLEVEL(4, "OK \n");
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{
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size_t i;
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DISPLAYLEVEL(4, "test%3i : check decompressed result : ", testNb++);
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for (i=0; i<COMPRESSIBLE_NOISE_LENGTH; i++)
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{
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if (((BYTE*)decodedBuffer)[i] != ((BYTE*)CNBuffer)[i]) goto _output_error;;
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}
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DISPLAYLEVEL(4, "OK \n");
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}
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DISPLAYLEVEL(4, "test%3i : decompress with 1 missing byte : ", testNb++);
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result = ZSTD_decompress(decodedBuffer, COMPRESSIBLE_NOISE_LENGTH, compressedBuffer, cSize-1);
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if (!ZSTD_isError(result)) goto _output_error;
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if (result != (size_t)-ZSTD_ERROR_SrcSize) goto _output_error;
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DISPLAYLEVEL(4, "OK \n");
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DISPLAYLEVEL(4, "test%3i : decompress with 1 too much byte : ", testNb++);
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result = ZSTD_decompress(decodedBuffer, COMPRESSIBLE_NOISE_LENGTH, compressedBuffer, cSize+1);
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if (!ZSTD_isError(result)) goto _output_error;
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if (result != (size_t)-ZSTD_ERROR_SrcSize) goto _output_error;
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DISPLAYLEVEL(4, "OK \n");
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/* Decompression defense tests */
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DISPLAYLEVEL(4, "test%3i : Check input length for magic number : ", testNb++);
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result = ZSTD_decompress(decodedBuffer, COMPRESSIBLE_NOISE_LENGTH, CNBuffer, 3);
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if (!ZSTD_isError(result)) goto _output_error;
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if (result != (size_t)-ZSTD_ERROR_SrcSize) goto _output_error;
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DISPLAYLEVEL(4, "OK \n");
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DISPLAYLEVEL(4, "test%3i : Check magic Number : ", testNb++);
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((char*)(CNBuffer))[0] = 1;
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result = ZSTD_decompress(decodedBuffer, COMPRESSIBLE_NOISE_LENGTH, CNBuffer, 4);
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if (!ZSTD_isError(result)) goto _output_error;
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DISPLAYLEVEL(4, "OK \n");
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/* long rle test */
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{
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size_t sampleSize = 0;
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DISPLAYLEVEL(4, "test%3i : Long RLE test : ", testNb++);
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FUZ_generateSynthetic(CNBuffer, sampleSize, compressibility, &randState);
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memset((char*)CNBuffer+sampleSize, 'B', 256 KB - 1);
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sampleSize += 256 KB - 1;
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FUZ_generateSynthetic((char*)CNBuffer+sampleSize, 96 KB, compressibility, &randState);
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sampleSize += 96 KB;
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cSize = ZSTD_compress(compressedBuffer, ZSTD_compressBound(sampleSize), CNBuffer, sampleSize);
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if (ZSTD_isError(cSize)) goto _output_error;
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result = ZSTD_decompress(decodedBuffer, sampleSize, compressedBuffer, cSize);
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if (ZSTD_isError(result)) goto _output_error;
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if (result!=sampleSize) goto _output_error;
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DISPLAYLEVEL(4, "OK \n");
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}
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_end:
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free(CNBuffer);
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free(compressedBuffer);
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free(decodedBuffer);
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return testResult;
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_output_error:
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testResult = 1;
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DISPLAY("Error detected in Unit tests ! \n");
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goto _end;
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}
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static size_t findDiff(const void* buf1, const void* buf2, size_t max)
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{
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const BYTE* b1 = (const BYTE*)buf1;
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const BYTE* b2 = (const BYTE*)buf2;
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size_t i;
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for (i=0; i<max; i++)
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{
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if (b1[i] != b2[i]) break;
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}
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return i;
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}
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# define CHECK(cond, ...) if (cond) { DISPLAY("Error => "); DISPLAY(__VA_ARGS__); \
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DISPLAY(" (seed %u, test nb %u) \n", seed, testNb); goto _output_error; }
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static const U32 maxSrcLog = 23;
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static const U32 maxSampleLog = 22;
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int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibility)
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{
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BYTE* srcBuffer;
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BYTE* cBuffer;
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BYTE* dstBuffer;
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size_t srcBufferSize = (size_t)1<<maxSrcLog;
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size_t dstBufferSize = (size_t)1<<maxSampleLog;
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size_t cBufferSize = ZSTD_compressBound(dstBufferSize);
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U32 result = 0;
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U32 testNb = 0;
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U32 coreSeed = seed, lseed = 0;
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/* allocation */
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srcBuffer = (BYTE*)malloc (srcBufferSize);
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dstBuffer = (BYTE*)malloc (dstBufferSize);
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cBuffer = (BYTE*)malloc (cBufferSize);
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CHECK (!srcBuffer || !dstBuffer || !cBuffer, "Not enough memory, fuzzer tests cancelled");
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/* Create initial sample */
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FUZ_generateSynthetic(srcBuffer, srcBufferSize, compressibility, &coreSeed);
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/* catch up testNb */
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for (testNb=1; testNb < startTest; testNb++)
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FUZ_rand(&coreSeed);
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/* test loop */
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for ( ; testNb <= nbTests; testNb++ )
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{
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size_t sampleSize, sampleStart;
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size_t cSize, dSize, dSupSize;
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U32 sampleSizeLog;
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U64 crcOrig, crcDest;
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/* init */
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DISPLAYUPDATE(2, "\r%6u/%6u ", testNb, nbTests);
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FUZ_rand(&coreSeed);
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lseed = coreSeed ^ prime1;
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sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
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sampleSize = (size_t)1 << sampleSizeLog;
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sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
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sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
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crcOrig = XXH64(srcBuffer + sampleStart, sampleSize, 0);
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/* compression test */
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cSize = ZSTD_compress(cBuffer, cBufferSize, srcBuffer + sampleStart, sampleSize);
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CHECK(ZSTD_isError(cSize), "ZSTD_compress failed");
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/* compression failure test : too small dest buffer */
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if (cSize > 3)
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{
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size_t errorCode;
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const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1; /* no problem, as cSize > 4 (frameHeaderSizer) */
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const size_t tooSmallSize = cSize - missing;
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static const U32 endMark = 0x4DC2B1A9;
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U32 endCheck;
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memcpy(dstBuffer+tooSmallSize, &endMark, 4);
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errorCode = ZSTD_compress(dstBuffer, tooSmallSize, srcBuffer + sampleStart, sampleSize);
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CHECK(!ZSTD_isError(errorCode), "ZSTD_compress should have failed ! (buffer too small)");
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memcpy(&endCheck, dstBuffer+tooSmallSize, 4);
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CHECK(endCheck != endMark, "ZSTD_compress : dst buffer overflow");
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}
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/* successfull decompression tests*/
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dSupSize = (FUZ_rand(&lseed) & 1) ? 0 : (FUZ_rand(&lseed) & 31) + 1;
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dSize = ZSTD_decompress(dstBuffer, sampleSize + dSupSize, cBuffer, cSize);
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CHECK(dSize != sampleSize, "ZSTD_decompress failed (%s)", ZSTD_getErrorName(dSize));
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crcDest = XXH64(dstBuffer, sampleSize, 0);
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CHECK(crcOrig != crcDest, "dstBuffer corrupted (pos %u / %u)", (U32)findDiff(srcBuffer+sampleStart, dstBuffer, sampleSize), (U32)sampleSize);
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/* truncated src decompression test */
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{
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size_t errorCode;
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const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1; /* no problem, as cSize > 4 (frameHeaderSizer) */
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const size_t tooSmallSize = cSize - missing;
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void* cBufferTooSmall = malloc(tooSmallSize); /* valgrind will catch overflows */
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memcpy(cBufferTooSmall, cBuffer, tooSmallSize);
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CHECK(cBufferTooSmall == NULL, "not enough memory !");
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errorCode = ZSTD_decompress(dstBuffer, dstBufferSize, cBufferTooSmall, tooSmallSize);
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CHECK(!ZSTD_isError(errorCode), "ZSTD_decompress should have failed ! (truncated src buffer)");
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free(cBufferTooSmall);
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}
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/* too small dst decompression test */
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if (sampleSize > 3)
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{
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size_t errorCode;
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const size_t missing = (FUZ_rand(&lseed) % (sampleSize-2)) + 1; /* no problem, as cSize > 4 (frameHeaderSizer) */
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const size_t tooSmallSize = sampleSize - missing;
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static const BYTE token = 0xA9;
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dstBuffer[tooSmallSize] = token;
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errorCode = ZSTD_decompress(dstBuffer, tooSmallSize, cBuffer, cSize);
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CHECK(!ZSTD_isError(errorCode), "ZSTD_decompress should have failed : %u > %u (dst buffer too small)", (U32)errorCode, (U32)tooSmallSize);
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CHECK(dstBuffer[tooSmallSize] != token, "ZSTD_decompress : dst buffer overflow");
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}
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}
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DISPLAY("\rAll fuzzer tests completed \n");
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_cleanup:
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free(srcBuffer);
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free(cBuffer);
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free(dstBuffer);
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return result;
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_output_error:
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result = 1;
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goto _cleanup;
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}
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/*********************************************************
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* Command line
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*********************************************************/
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int FUZ_usage(char* programName)
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{
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DISPLAY( "Usage :\n");
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DISPLAY( " %s [args]\n", programName);
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DISPLAY( "\n");
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DISPLAY( "Arguments :\n");
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DISPLAY( " -i# : Nb of tests (default:%u) \n", nbTestsDefault);
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DISPLAY( " -s# : Select seed (default:prompt user)\n");
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DISPLAY( " -t# : Select starting test number (default:0)\n");
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DISPLAY( " -P# : Select compressibility in %% (default:%i%%)\n", FUZ_COMPRESSIBILITY_DEFAULT);
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DISPLAY( " -v : verbose\n");
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DISPLAY( " -p : pause at the end\n");
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DISPLAY( " -h : display help and exit\n");
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return 0;
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}
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int main(int argc, char** argv)
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{
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U32 seed=0;
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int seedset=0;
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int argNb;
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int nbTests = nbTestsDefault;
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int testNb = 0;
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int proba = FUZ_COMPRESSIBILITY_DEFAULT;
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int result=0;
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U32 mainPause = 0;
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char* programName;
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/* Check command line */
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programName = argv[0];
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for(argNb=1; argNb<argc; argNb++)
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{
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char* argument = argv[argNb];
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if(!argument) continue; /* Protection if argument empty */
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/* Handle commands. Aggregated commands are allowed */
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if (argument[0]=='-')
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{
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argument++;
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|
|
while (*argument!=0)
|
|
{
|
|
switch(*argument)
|
|
{
|
|
case 'h':
|
|
return FUZ_usage(programName);
|
|
case 'v':
|
|
argument++;
|
|
g_displayLevel=4;
|
|
break;
|
|
case 'q':
|
|
argument++;
|
|
g_displayLevel--;
|
|
break;
|
|
case 'p': /* pause at the end */
|
|
argument++;
|
|
mainPause = 1;
|
|
break;
|
|
|
|
case 'i':
|
|
argument++;
|
|
nbTests=0;
|
|
while ((*argument>='0') && (*argument<='9'))
|
|
{
|
|
nbTests *= 10;
|
|
nbTests += *argument - '0';
|
|
argument++;
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
argument++;
|
|
seed=0;
|
|
seedset=1;
|
|
while ((*argument>='0') && (*argument<='9'))
|
|
{
|
|
seed *= 10;
|
|
seed += *argument - '0';
|
|
argument++;
|
|
}
|
|
break;
|
|
|
|
case 't':
|
|
argument++;
|
|
testNb=0;
|
|
while ((*argument>='0') && (*argument<='9'))
|
|
{
|
|
testNb *= 10;
|
|
testNb += *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 zstd tester (%i-bits, %s)\n", (int)(sizeof(size_t)*8), ZSTD_VERSION);
|
|
|
|
if (!seedset) seed = FUZ_GetMilliStart() % 10000;
|
|
DISPLAY("Seed = %u\n", seed);
|
|
if (proba!=FUZ_COMPRESSIBILITY_DEFAULT) DISPLAY("Compressibility : %i%%\n", proba);
|
|
|
|
if (nbTests<=0) nbTests=1;
|
|
|
|
if (testNb==0) result = basicUnitTests(0, ((double)proba) / 100); /* constant seed for predictability */
|
|
if (!result)
|
|
result = fuzzerTests(seed, nbTests, testNb, ((double)proba) / 100);
|
|
if (mainPause)
|
|
{
|
|
int unused;
|
|
DISPLAY("Press Enter \n");
|
|
unused = getchar();
|
|
(void)unused;
|
|
}
|
|
return result;
|
|
}
|