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-rw-r--r--programs/frametest.c106
1 files changed, 81 insertions, 25 deletions
diff --git a/programs/frametest.c b/programs/frametest.c
index 24cf921..be2be76 100644
--- a/programs/frametest.c
+++ b/programs/frametest.c
@@ -26,16 +26,10 @@
/**************************************
* Compiler specific
**************************************/
-#define _CRT_SECURE_NO_WARNINGS // fgets
#ifdef _MSC_VER /* Visual Studio */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
# pragma warning(disable : 4146) /* disable: C4146: minus unsigned expression */
#endif
-#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#ifdef __GNUC__
-# 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) */
-# 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) */
-#endif
/* S_ISREG & gettimeofday() are not supported by MSVC */
#if defined(_MSC_VER) || defined(_WIN32)
@@ -46,11 +40,11 @@
/**************************************
* Includes
**************************************/
-#include <stdlib.h> // free
-#include <stdio.h> // fgets, sscanf
-#include <string.h> // strcmp
+#include <stdlib.h> /* malloc, free */
+#include <stdio.h> /* fprintf */
+#include <string.h> /* strcmp */
#include "lz4frame_static.h"
-#include "xxhash.h" // XXH64
+#include "xxhash.h" /* XXH64 */
/* Use ftime() if gettimeofday() is not available on your target */
#if defined(FUZ_LEGACY_TIMER)
@@ -79,6 +73,17 @@ typedef unsigned long long U64;
#endif
+/* 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
**************************************/
@@ -86,6 +91,8 @@ typedef unsigned long long U64;
# define LZ4_VERSION ""
#endif
+#define LZ4F_MAGIC_SKIPPABLE_START 0x184D2A50U
+
#define KB *(1U<<10)
#define MB *(1U<<20)
#define GB *(1U<<30)
@@ -99,7 +106,7 @@ static const U32 prime2 = 2246822519U;
/**************************************
- Macros
+* Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
@@ -112,7 +119,7 @@ static U32 g_time = 0;
/*****************************************
- Local Parameters
+* Local Parameters
*****************************************/
static U32 no_prompt = 0;
static char* programName;
@@ -178,15 +185,15 @@ static void FUZ_fillCompressibleNoiseBuffer(void* buffer, unsigned bufferSize, d
unsigned pos = 0;
U32 P32 = (U32)(32768 * proba);
- // First Byte
+ /* First Byte */
BBuffer[pos++] = (BYTE)(FUZ_rand(seed));
while (pos < bufferSize)
{
- // Select : Literal (noise) or copy (within 64K)
+ /* Select : Literal (noise) or copy (within 64K) */
if (FUZ_RAND15BITS < P32)
{
- // Copy (within 64K)
+ /* Copy (within 64K) */
unsigned match, end;
unsigned length = FUZ_RANDLENGTH + 4;
unsigned offset = FUZ_RAND15BITS + 1;
@@ -198,7 +205,7 @@ static void FUZ_fillCompressibleNoiseBuffer(void* buffer, unsigned bufferSize, d
}
else
{
- // Literal (noise)
+ /* Literal (noise) */
unsigned end;
unsigned length = FUZ_RANDLENGTH;
if (pos + length > bufferSize) length = bufferSize - pos;
@@ -374,6 +381,40 @@ int basicTests(U32 seed, double compressibility)
if (LZ4F_isError(cSize)) goto _output_error;
DISPLAYLEVEL(3, "Compressed %i bytes into a %i bytes frame \n", (int)testSize, (int)cSize);
+ 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* const iend = (BYTE*)compressedBuffer + cSize + 8;
+
+ LZ4F_errorCode_t errorCode = LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION);
+ if (LZ4F_isError(errorCode)) goto _output_error;
+
+ /* 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 = oend-op;
+ if (iSize > (size_t)(iend-ip)) iSize = iend-ip;
+ errorCode = LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL);
+ if (LZ4F_isError(errorCode)) goto _output_error;
+ op += oSize;
+ ip += iSize;
+ }
+ DISPLAYLEVEL(3, "Skipped %i bytes \n", (int)decodedBufferSize);
+
+ errorCode = LZ4F_freeDecompressionContext(dCtx);
+ if (LZ4F_isError(errorCode)) goto _output_error;
+ }
+
DISPLAY("Basic tests completed \n");
_end:
free(CNBuffer);
@@ -445,8 +486,8 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
unsigned CCflag = FUZ_rand(&randState) & 1;
unsigned autoflush = (FUZ_rand(&randState) & 7) == 2;
LZ4F_preferences_t prefs;
- LZ4F_compressOptions_t cOptions = { 0 };
- LZ4F_decompressOptions_t dOptions = { 0 };
+ LZ4F_compressOptions_t cOptions;
+ LZ4F_decompressOptions_t dOptions;
unsigned nbBits = (FUZ_rand(&randState) % (FUZ_highbit(srcDataLength-1) - 1)) + 1;
size_t srcSize = (FUZ_rand(&randState) & ((1<<nbBits)-1)) + 1;
size_t srcStart = FUZ_rand(&randState) % (srcDataLength - srcSize);
@@ -454,19 +495,29 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
U64 crcOrig, crcDecoded;
LZ4F_preferences_t* prefsPtr = &prefs;
- (void)FUZ_rand(&coreRand); // update rand seed
+ (void)FUZ_rand(&coreRand); /* update seed */
memset(&prefs, 0, sizeof(prefs));
+ memset(&cOptions, 0, sizeof(cOptions));
+ memset(&dOptions, 0, sizeof(dOptions));
prefs.frameInfo.blockMode = (blockMode_t)BMId;
prefs.frameInfo.blockSizeID = (blockSizeID_t)BSId;
prefs.frameInfo.contentChecksumFlag = (contentChecksum_t)CCflag;
prefs.autoFlush = autoflush;
prefs.compressionLevel = FUZ_rand(&randState) % 5;
- if ((FUZ_rand(&randState)&0xF) == 1) prefsPtr = NULL;
+ if ((FUZ_rand(&randState) & 0xF) == 1) prefsPtr = NULL;
DISPLAYUPDATE(2, "\r%5u ", testNb);
- crcOrig = XXH64((BYTE*)srcBuffer+srcStart, (U32)srcSize, 1);
+ crcOrig = XXH64((BYTE*)srcBuffer+srcStart, srcSize, 1);
- if ((FUZ_rand(&randState)&0xF) == 2)
+ if ((FUZ_rand(&randState) & 0xFFF) == 3)
+ {
+ /* 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, srcSize);
+ cSize = srcSize+8;
+ }
+ else if ((FUZ_rand(&randState) & 0xF) == 2)
{
cSize = LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(srcSize, prefsPtr), (char*)srcBuffer + srcStart, srcSize, prefsPtr);
CHECK(LZ4F_isError(cSize), "LZ4F_compressFrame failed : error %i (%s)", (int)cSize, LZ4F_getErrorName(cSize));
@@ -513,6 +564,7 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
const BYTE* const iend = ip + cSize;
BYTE* op = (BYTE*)decodedBuffer;
BYTE* const oend = op + srcDataLength;
+ size_t totalOut = 0;
unsigned maxBits = FUZ_highbit((U32)cSize);
unsigned nonContiguousDst = (FUZ_rand(&randState) & 3) == 1;
nonContiguousDst += FUZ_rand(&randState) & nonContiguousDst; /* 0=>0; 1=>1,2 */
@@ -531,15 +583,19 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
if (result == (size_t)-ERROR_checksum_invalid) locateBuffDiff((BYTE*)srcBuffer+srcStart, decodedBuffer, srcSize, nonContiguousDst);
CHECK(LZ4F_isError(result), "Decompression failed (error %i:%s)", (int)result, LZ4F_getErrorName((LZ4F_errorCode_t)result));
XXH64_update(&xxh64, op, (U32)oSize);
+ totalOut += oSize;
op += oSize;
ip += iSize;
op += nonContiguousDst;
if (nonContiguousDst==2) op = (BYTE*)decodedBuffer; /* overwritten destination */
}
CHECK(result != 0, "Frame decompression failed (error %i)", (int)result);
- crcDecoded = XXH64_digest(&xxh64);
- if (crcDecoded != crcOrig) locateBuffDiff((BYTE*)srcBuffer+srcStart, decodedBuffer, srcSize, nonContiguousDst);
- CHECK(crcDecoded != crcOrig, "Decompression corruption");
+ if (totalOut) /* otherwise, it's a skippable frame */
+ {
+ crcDecoded = XXH64_digest(&xxh64);
+ if (crcDecoded != crcOrig) locateBuffDiff((BYTE*)srcBuffer+srcStart, decodedBuffer, srcSize, nonContiguousDst);
+ CHECK(crcDecoded != crcOrig, "Decompression corruption");
+ }
}
}
generated by cgit v0.12 at 2024-10-30 23:44:11 (GMT)