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7b44372099
Increase the project version to 1.1.0 as this is a new feature version. As for all new feature versions, increase the libtool .so version. Only increase the revision, as no API's were added or removed. It may look like I've increased it by 2, but that's because v1.0.8 used Makefiles and was at 1:8:0. See http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
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/* A test program written to test robustness to decompression of
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corrupted data. Usage is
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unzcrash filename
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and the program will read the specified file, compress it (in memory),
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and then repeatedly decompress it, each time with a different bit of
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the compressed data inverted, so as to test all possible one-bit errors.
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This should not cause any invalid memory accesses. If it does,
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I want to know about it!
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PS. As you can see from the above description, the process is
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incredibly slow. A file of size eg 5KB will cause it to run for
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many hours.
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*/
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/* ------------------------------------------------------------------
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This file is part of bzip2/libbzip2, a program and library for
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lossless, block-sorting data compression.
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bzip2/libbzip2 version 1.1.0 of 6 September 2010
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Copyright (C) 1996-2010 Julian Seward <jseward@acm.org>
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Please read the WARNING, DISCLAIMER and PATENTS sections in the
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README file.
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This program is released under the terms of the license contained
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in the file LICENSE.
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------------------------------------------------------------------ */
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#include <stdio.h>
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#include <assert.h>
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#include "bzlib.h"
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#define M_BLOCK 1000000
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typedef unsigned char uchar;
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#define M_BLOCK_OUT (M_BLOCK + 1000000)
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uchar inbuf[M_BLOCK];
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uchar outbuf[M_BLOCK_OUT];
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uchar zbuf[M_BLOCK + 600 + (M_BLOCK / 100)];
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int nIn, nOut, nZ;
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static char *bzerrorstrings[] = {
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"OK"
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,"SEQUENCE_ERROR"
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,"PARAM_ERROR"
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,"MEM_ERROR"
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,"DATA_ERROR"
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,"DATA_ERROR_MAGIC"
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,"IO_ERROR"
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,"UNEXPECTED_EOF"
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,"OUTBUFF_FULL"
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,"???" /* for future */
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,"???" /* for future */
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,"???" /* for future */
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,"???" /* for future */
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,"???" /* for future */
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,"???" /* for future */
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};
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void flip_bit ( int bit )
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{
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int byteno = bit / 8;
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int bitno = bit % 8;
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uchar mask = 1 << bitno;
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//fprintf ( stderr, "(byte %d bit %d mask %d)",
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// byteno, bitno, (int)mask );
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zbuf[byteno] ^= mask;
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}
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int main ( int argc, char** argv )
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{
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FILE* f;
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int r;
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int bit;
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int i;
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if (argc != 2) {
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fprintf ( stderr, "usage: unzcrash filename\n" );
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return 1;
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}
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f = fopen ( argv[1], "r" );
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if (!f) {
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fprintf ( stderr, "unzcrash: can't open %s\n", argv[1] );
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return 1;
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}
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nIn = fread ( inbuf, 1, M_BLOCK, f );
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fprintf ( stderr, "%d bytes read\n", nIn );
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nZ = M_BLOCK;
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r = BZ2_bzBuffToBuffCompress (
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zbuf, &nZ, inbuf, nIn, 9, 0, 30 );
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assert (r == BZ_OK);
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fprintf ( stderr, "%d after compression\n", nZ );
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for (bit = 0; bit < nZ*8; bit++) {
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fprintf ( stderr, "bit %d ", bit );
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flip_bit ( bit );
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nOut = M_BLOCK_OUT;
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r = BZ2_bzBuffToBuffDecompress (
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outbuf, &nOut, zbuf, nZ, 0, 0 );
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fprintf ( stderr, " %d %s ", r, bzerrorstrings[-r] );
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if (r != BZ_OK) {
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fprintf ( stderr, "\n" );
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} else {
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if (nOut != nIn) {
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fprintf(stderr, "nIn/nOut mismatch %d %d\n", nIn, nOut );
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return 1;
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} else {
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for (i = 0; i < nOut; i++)
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if (inbuf[i] != outbuf[i]) {
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fprintf(stderr, "mismatch at %d\n", i );
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return 1;
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}
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if (i == nOut) fprintf(stderr, "really ok!\n" );
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}
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}
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flip_bit ( bit );
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}
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#if 0
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assert (nOut == nIn);
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for (i = 0; i < nOut; i++) {
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if (inbuf[i] != outbuf[i]) {
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fprintf ( stderr, "difference at %d !\n", i );
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return 1;
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}
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}
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#endif
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fprintf ( stderr, "all ok\n" );
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return 0;
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}
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