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SQLite training in Houston TX on 2019-11-05 (details)
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Overview
Comment:Add the ability to process dbsqlfuzz cases in fuzzcheck and add an initial set of interesting dbsqlfuzz cases.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | dbsqlfuzz-in-fuzzcheck
Files: files | file ages | folders
SHA3-256: fb9074ff450a67feaa62ca61d19154de26d5c8a8d147409ee6d1fbd667b2914f
User & Date: drh 2019-01-25 04:00:14
Context
2019-01-25
04:43
Improved automatic detection of dbsqlfuzz cases in fuzzcheck. check-in: 1ef24e89 user: drh tags: dbsqlfuzz-in-fuzzcheck
04:00
Add the ability to process dbsqlfuzz cases in fuzzcheck and add an initial set of interesting dbsqlfuzz cases. check-in: fb9074ff user: drh tags: dbsqlfuzz-in-fuzzcheck
2019-01-24
17:41
Fix a buffer overread in fts3 that could occur in a prefix query on a corrupted database. check-in: d0d56893 user: dan tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to Makefile.in.

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FUZZDATA = \
  $(TOP)/test/fuzzdata1.db \
  $(TOP)/test/fuzzdata2.db \
  $(TOP)/test/fuzzdata3.db \
  $(TOP)/test/fuzzdata4.db \
  $(TOP)/test/fuzzdata5.db \
  $(TOP)/test/fuzzdata6.db \
  $(TOP)/test/fuzzdata7.db


# Standard options to testfixture
#
TESTOPTS = --verbose=file --output=test-out.txt

# Extra compiler options for various shell tools
#
................................................................................
SHELL_OPT += -DSQLITE_ENABLE_OFFSET_SQL_FUNC
SHELL_OPT += -DSQLITE_ENABLE_DESERIALIZE
SHELL_OPT += -DSQLITE_INTROSPECTION_PRAGMAS
FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ
FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
FUZZCHECK_OPT += -DSQLITE_PRINTF_PRECISION_LIMIT=1000






FUZZCHECK_SRC = $(TOP)/test/fuzzcheck.c $(TOP)/test/ossfuzz.c
DBFUZZ_OPT =

# This is the default Makefile target.  The objects listed here
# are what get build when you type just "make" with no arguments.
#
all:	sqlite3.h libsqlite3.la sqlite3$(TEXE) $(HAVE_TCL:1=libtclsqlite3.la)







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FUZZDATA = \
  $(TOP)/test/fuzzdata1.db \
  $(TOP)/test/fuzzdata2.db \
  $(TOP)/test/fuzzdata3.db \
  $(TOP)/test/fuzzdata4.db \
  $(TOP)/test/fuzzdata5.db \
  $(TOP)/test/fuzzdata6.db \
  $(TOP)/test/fuzzdata7.db \
  $(TOP)/test/fuzzdata8.db

# Standard options to testfixture
#
TESTOPTS = --verbose=file --output=test-out.txt

# Extra compiler options for various shell tools
#
................................................................................
SHELL_OPT += -DSQLITE_ENABLE_OFFSET_SQL_FUNC
SHELL_OPT += -DSQLITE_ENABLE_DESERIALIZE
SHELL_OPT += -DSQLITE_INTROSPECTION_PRAGMAS
FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ
FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
FUZZCHECK_OPT += -DSQLITE_PRINTF_PRECISION_LIMIT=1000
FUZZCHECK_OPT += -DSQLITE_ENABLE_DESERIALIZE
FUZZCHECK_OPT += -DSQLITE_ENABLE_FTS4
#FUZZCHECK_OPT += -DSQLITE_ENABLE_FTS5
FUZZCHECK_OPT += -DSQLITE_ENABLE_RTREE
FUZZCHECK_OPT += -DSQLITE_ENABLE_GEOPOLY
FUZZCHECK_OPT += -DSQLITE_ENABLE_DBSTAT_VTAB
FUZZCHECK_SRC = $(TOP)/test/fuzzcheck.c $(TOP)/test/ossfuzz.c
DBFUZZ_OPT =

# This is the default Makefile target.  The objects listed here
# are what get build when you type just "make" with no arguments.
#
all:	sqlite3.h libsqlite3.la sqlite3$(TEXE) $(HAVE_TCL:1=libtclsqlite3.la)

Changes to Makefile.msc.

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FUZZDATA = \
  $(TOP)\test\fuzzdata1.db \
  $(TOP)\test\fuzzdata2.db \
  $(TOP)\test\fuzzdata3.db \
  $(TOP)\test\fuzzdata4.db \
  $(TOP)\test\fuzzdata5.db \
  $(TOP)\test\fuzzdata6.db \
  $(TOP)\test\fuzzdata7.db

# <</mark>>

# Additional compiler options for the shell.  These are only effective
# when the shell is not being dynamically linked.
#
!IF $(DYNAMIC_SHELL)==0 && $(FOR_WIN10)==0
SHELL_COMPILE_OPTS = $(SHELL_COMPILE_OPTS) -DSQLITE_ENABLE_FTS4=1
................................................................................
!ENDIF

# <<mark>>
# Extra compiler options for various test tools.
#
MPTESTER_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_FTS5
FUZZERSHELL_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1
FUZZCHECK_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ -DSQLITE_MAX_MEMORY=50000000 -DSQLITE_PRINTF_PRECISION_LIMIT=1000






FUZZCHECK_SRC = $(TOP)\test\fuzzcheck.c $(TOP)\test\ossfuzz.c
OSSSHELL_SRC = $(TOP)\test\ossshell.c $(TOP)\test\ossfuzz.c
DBFUZZ_COMPILE_OPTS = -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION
KV_COMPILE_OPTS = -DSQLITE_THREADSAFE=0 -DSQLITE_DIRECT_OVERFLOW_READ
ST_COMPILE_OPTS = -DSQLITE_THREADSAFE=0

# Standard options to testfixture.
................................................................................
fuzzershell.exe:	$(TOP)\tool\fuzzershell.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(FUZZERSHELL_COMPILE_OPTS) $(TOP)\tool\fuzzershell.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

dbfuzz.exe:	$(TOP)\test\dbfuzz.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(DBFUZZ_COMPILE_OPTS) $(TOP)\test\dbfuzz.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

fuzzcheck.exe:	$(FUZZCHECK_SRC) $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(FUZZCHECK_COMPILE_OPTS) $(FUZZCHECK_SRC) $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

ossshell.exe:	$(OSSSHELL_SRC) $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(FUZZCHECK_COMPILE_OPTS) $(OSSSHELL_SRC) $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

sessionfuzz.exe:	zlib $(TOP)\test\sessionfuzz.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) -I$(ZLIBINCDIR) $(TOP)\test\sessionfuzz.c /link $(LDFLAGS) $(LTLINKOPTS) /LIBPATH:$(ZLIBLIBDIR) $(ZLIBLIB)

mptester.exe:	$(TOP)\mptest\mptest.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(MPTESTER_COMPILE_OPTS) $(TOP)\mptest\mptest.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)








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FUZZDATA = \
  $(TOP)\test\fuzzdata1.db \
  $(TOP)\test\fuzzdata2.db \
  $(TOP)\test\fuzzdata3.db \
  $(TOP)\test\fuzzdata4.db \
  $(TOP)\test\fuzzdata5.db \
  $(TOP)\test\fuzzdata6.db \
  $(TOP)\test\fuzzdata7.db \
  $(TOP)\test\fuzzdata8.db
# <</mark>>

# Additional compiler options for the shell.  These are only effective
# when the shell is not being dynamically linked.
#
!IF $(DYNAMIC_SHELL)==0 && $(FOR_WIN10)==0
SHELL_COMPILE_OPTS = $(SHELL_COMPILE_OPTS) -DSQLITE_ENABLE_FTS4=1
................................................................................
!ENDIF

# <<mark>>
# Extra compiler options for various test tools.
#
MPTESTER_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_FTS5
FUZZERSHELL_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPTS = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ -DSQLITE_MAX_MEMORY=50000000 -DSQLITE_PRINTF_PRECISION_LIMIT=1000
FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_DESERIALIZE
FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_FTS4
FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_RTREE
FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_GEOPOLY
FUZZCHECK_OPTS = $(FUZZCHECK_OPTS) -DSQLITE_ENABLE_DBSTAT_VTAB

FUZZCHECK_SRC = $(TOP)\test\fuzzcheck.c $(TOP)\test\ossfuzz.c
OSSSHELL_SRC = $(TOP)\test\ossshell.c $(TOP)\test\ossfuzz.c
DBFUZZ_COMPILE_OPTS = -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION
KV_COMPILE_OPTS = -DSQLITE_THREADSAFE=0 -DSQLITE_DIRECT_OVERFLOW_READ
ST_COMPILE_OPTS = -DSQLITE_THREADSAFE=0

# Standard options to testfixture.
................................................................................
fuzzershell.exe:	$(TOP)\tool\fuzzershell.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(FUZZERSHELL_COMPILE_OPTS) $(TOP)\tool\fuzzershell.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

dbfuzz.exe:	$(TOP)\test\dbfuzz.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(DBFUZZ_COMPILE_OPTS) $(TOP)\test\dbfuzz.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

fuzzcheck.exe:	$(FUZZCHECK_SRC) $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(FUZZCHECK_OPTS) $(FUZZCHECK_SRC) $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

ossshell.exe:	$(OSSSHELL_SRC) $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(FUZZCHECK_OPTS) $(OSSSHELL_SRC) $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

sessionfuzz.exe:	zlib $(TOP)\test\sessionfuzz.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) -I$(ZLIBINCDIR) $(TOP)\test\sessionfuzz.c /link $(LDFLAGS) $(LTLINKOPTS) /LIBPATH:$(ZLIBLIBDIR) $(ZLIBLIB)

mptester.exe:	$(TOP)\mptest\mptest.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(MPTESTER_COMPILE_OPTS) $(TOP)\mptest\mptest.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

Changes to main.mk.

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FUZZDATA = \
  $(TOP)/test/fuzzdata1.db \
  $(TOP)/test/fuzzdata2.db \
  $(TOP)/test/fuzzdata3.db \
  $(TOP)/test/fuzzdata4.db \
  $(TOP)/test/fuzzdata5.db \
  $(TOP)/test/fuzzdata6.db \
  $(TOP)/test/fuzzdata7.db


# Standard options to testfixture
#
TESTOPTS = --verbose=file --output=test-out.txt

# Extra compiler options for various shell tools
#
................................................................................
SHELL_OPT += -DSQLITE_ENABLE_DBSTAT_VTAB
SHELL_OPT += -DSQLITE_ENABLE_OFFSET_SQL_FUNC
SHELL_OPT += -DSQLITE_INTROSPECTION_PRAGMAS
FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5
FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
FUZZCHECK_OPT += -DSQLITE_PRINTF_PRECISION_LIMIT=1000





DBFUZZ_OPT =
KV_OPT = -DSQLITE_THREADSAFE=0 -DSQLITE_DIRECT_OVERFLOW_READ
ST_OPT = -DSQLITE_THREADSAFE=0

# This is the default Makefile target.  The objects listed here
# are what get build when you type just "make" with no arguments.
#







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FUZZDATA = \
  $(TOP)/test/fuzzdata1.db \
  $(TOP)/test/fuzzdata2.db \
  $(TOP)/test/fuzzdata3.db \
  $(TOP)/test/fuzzdata4.db \
  $(TOP)/test/fuzzdata5.db \
  $(TOP)/test/fuzzdata6.db \
  $(TOP)/test/fuzzdata7.db \
  $(TOP)/test/fuzzdata8.db

# Standard options to testfixture
#
TESTOPTS = --verbose=file --output=test-out.txt

# Extra compiler options for various shell tools
#
................................................................................
SHELL_OPT += -DSQLITE_ENABLE_DBSTAT_VTAB
SHELL_OPT += -DSQLITE_ENABLE_OFFSET_SQL_FUNC
SHELL_OPT += -DSQLITE_INTROSPECTION_PRAGMAS
FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5
FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
FUZZCHECK_OPT += -DSQLITE_PRINTF_PRECISION_LIMIT=1000
FUZZCHECK_OPT += -DSQLITE_ENABLE_DESERIALIZE
FUZZCHECK_OPT += -DSQLITE_ENABLE_FTS4
FUZZCHECK_OPT += -DSQLITE_ENABLE_RTREE
FUZZCHECK_OPT += -DSQLITE_ENABLE_GEOPOLY
FUZZCHECK_OPT += -DSQLITE_ENABLE_DBSTAT_VTAB
DBFUZZ_OPT =
KV_OPT = -DSQLITE_THREADSAFE=0 -DSQLITE_DIRECT_OVERFLOW_READ
ST_OPT = -DSQLITE_THREADSAFE=0

# This is the default Makefile target.  The objects listed here
# are what get build when you type just "make" with no arguments.
#

Changes to test/fuzzcheck.c.

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** DB values that were running when the crash occurred.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>

#include "sqlite3.h"
#define ISSPACE(X) isspace((unsigned char)(X))
#define ISDIGIT(X) isdigit((unsigned char)(X))


#ifdef __unix__
# include <signal.h>
................................................................................
  while( p ){
    pNext = p->pNext;
    free(p);
    p = pNext;
  }
}


/* Return the current wall-clock time */
static sqlite3_int64 timeOfDay(void){
  static sqlite3_vfs *clockVfs = 0;
  sqlite3_int64 t;
  if( clockVfs==0 ){
    clockVfs = sqlite3_vfs_find(0);
    if( clockVfs==0 ) return 0;
................................................................................
  }else{
    double r;
    clockVfs->xCurrentTime(clockVfs, &r);
    t = (sqlite3_int64)(r*86400000.0);
  }
  return t;
}



























































































































































































































































































































































































































































/* Methods for the VHandle object
*/
static int inmemClose(sqlite3_file *pFile){
  VHandle *p = (VHandle*)pFile;
  VFile *pVFile = p->pVFile;
  pVFile->nRef--;
................................................................................
      if( strcmp(z,"prng-seed")==0 ){
        if( i>=argc-1 ) fatalError("missing arguments on %s", argv[i]);
        g.uRandom = atoi(argv[++i]);
      }else
      if( strcmp(z,"quiet")==0 || strcmp(z,"q")==0 ){
        quietFlag = 1;
        verboseFlag = 0;

      }else
      if( strcmp(z,"rebuild")==0 ){
        rebuildFlag = 1;
        openFlags4Data = SQLITE_OPEN_READWRITE;
      }else
      if( strcmp(z,"result-trace")==0 ){
        runFlags |= SQL_OUTPUT;
................................................................................
#ifndef __unix__
        fatalError("timeout is not available on non-unix systems");
#endif
      }else
      if( strcmp(z,"verbose")==0 || strcmp(z,"v")==0 ){
        quietFlag = 0;
        verboseFlag++;

        if( verboseFlag>1 ) runFlags |= SQL_TRACE;









      }else
      {
        fatalError("unknown option: %s", argv[i]);
      }
    }else{
      nSrcDb++;
      azSrcDb = safe_realloc(azSrcDb, nSrcDb*sizeof(azSrcDb[0]));
................................................................................
    /* Reset the in-memory virtual filesystem */
    formatVfs();
    
    /* Run a test using each SQL script against each database.
    */
    if( !verboseFlag && !quietFlag ) printf("%s:", zDbName);
    for(pSql=g.pFirstSql; pSql; pSql=pSql->pNext){




















      for(pDb=g.pFirstDb; pDb; pDb=pDb->pNext){
        int openFlags;
        const char *zVfs = "inmem";
        sqlite3_snprintf(sizeof(g.zTestName), g.zTestName, "sqlid=%d,dbid=%d",
                         pSql->id, pDb->id);
        if( verboseFlag ){
          printf("%s\n", g.zTestName);







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** DB values that were running when the crash occurred.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#include <assert.h>
#include "sqlite3.h"
#define ISSPACE(X) isspace((unsigned char)(X))
#define ISDIGIT(X) isdigit((unsigned char)(X))


#ifdef __unix__
# include <signal.h>
................................................................................
  while( p ){
    pNext = p->pNext;
    free(p);
    p = pNext;
  }
}


/* Return the current wall-clock time */
static sqlite3_int64 timeOfDay(void){
  static sqlite3_vfs *clockVfs = 0;
  sqlite3_int64 t;
  if( clockVfs==0 ){
    clockVfs = sqlite3_vfs_find(0);
    if( clockVfs==0 ) return 0;
................................................................................
  }else{
    double r;
    clockVfs->xCurrentTime(clockVfs, &r);
    t = (sqlite3_int64)(r*86400000.0);
  }
  return t;
}

/***************************************************************************
** Code to process combined database+SQL scripts generated by the
** dbsqlfuzz fuzzer.
*/

/* An instance of the following object is passed by pointer as the
** client data to various callbacks.
*/
typedef struct FuzzCtx {
  sqlite3 *db;               /* The database connection */
  sqlite3_int64 iCutoffTime; /* Stop processing at this time. */
  sqlite3_int64 iLastCb;     /* Time recorded for previous progress callback */
  sqlite3_int64 mxInterval;  /* Longest interval between two progress calls */
  unsigned nCb;              /* Number of progress callbacks */
  unsigned mxCb;             /* Maximum number of progress callbacks allowed */
  unsigned execCnt;          /* Number of calls to the sqlite3_exec callback */
  int timeoutHit;            /* True when reaching a timeout */
} FuzzCtx;

/* Verbosity level for the dbsqlfuzz test runner */
static int eVerbosity = 0;

/* True to activate PRAGMA vdbe_debug=on */
static int bVdbeDebug = 0;

/* Timeout for each fuzzing attempt, in milliseconds */
static int iTimeout = 10000;   /* Defaults to 10 seconds */

/* Maximum number of progress handler callbacks */
static unsigned int mxProgressCb = 2000;

/* Maximum string length in SQLite */
static int lengthLimit = 1000000;

/* Maximum byte-code program length in SQLite */
static int vdbeOpLimit = 25000;

/* Maximum size of the in-memory database */
static sqlite3_int64 maxDbSize = 104857600;

/*
** Translate a single byte of Hex into an integer.
** This routine only works if h really is a valid hexadecimal
** character:  0..9a..fA..F
*/
static unsigned int hexToInt(unsigned int h){
#ifdef SQLITE_EBCDIC
  h += 9*(1&~(h>>4));   /* EBCDIC */
#else
  h += 9*(1&(h>>6));    /* ASCII */
#endif
  return h & 0xf;
}

/*
** The first character of buffer zIn[0..nIn-1] is a '['.  This routine
** checked to see if the buffer holds "[NNNN]" or "[+NNNN]" and if it
** does it makes corresponding changes to the *pK value and *pI value
** and returns true.  If the input buffer does not match the patterns,
** no changes are made to either *pK or *pI and this routine returns false.
*/
static int isOffset(
  const unsigned char *zIn,  /* Text input */
  int nIn,                   /* Bytes of input */
  unsigned int *pK,          /* half-byte cursor to adjust */
  unsigned int *pI           /* Input index to adjust */
){
  int i;
  unsigned int k = 0;
  unsigned char c;
  for(i=1; i<nIn && (c = zIn[i])!=']'; i++){
    if( !isxdigit(c) ) return 0;
    k = k*16 + hexToInt(c);
  }
  if( i==nIn ) return 0;
  *pK = 2*k;
  *pI += i;
  return 1;
}

/*
** Decode the text starting at zIn into a binary database file.
** The maximum length of zIn is nIn bytes.  Compute the binary database
** file contain in space obtained from sqlite3_malloc().
**
** Return the number of bytes of zIn consumed.  Or return -1 if there
** is an error.  One potential error is that the recipe specifies a
** database file larger than MX_FILE_SZ bytes.
**
** Abort on an OOM.
*/
static int decodeDatabase(
  const unsigned char *zIn,      /* Input text to be decoded */
  int nIn,                       /* Bytes of input text */
  unsigned char **paDecode,      /* OUT: decoded database file */
  int *pnDecode                  /* OUT: Size of decoded database */
){
  unsigned char *a;              /* Database under construction */
  int mx = 0;                    /* Current size of the database */
  sqlite3_uint64 nAlloc = 4096;  /* Space allocated in a[] */
  unsigned int i;                /* Next byte of zIn[] to read */
  unsigned int j;                /* Temporary integer */
  unsigned int k;                /* half-byte cursor index for output */
  unsigned int n;                /* Number of bytes of input */
  unsigned char b = 0;
  if( nIn<4 ) return -1;
  n = (unsigned int)nIn;
  a = sqlite3_malloc( nAlloc );
  if( a==0 ){
    fprintf(stderr, "Out of memory!\n");
    exit(1);
  }
  memset(a, 0, nAlloc);
  for(i=k=0; i<n; i++){
    char c = zIn[i];
    if( isxdigit(c) ){
      k++;
      if( k & 1 ){
        b = hexToInt(c)*16;
      }else{
        b += hexToInt(c);
        j = k/2 - 1;
        if( j>=nAlloc ){
          sqlite3_uint64 newSize;
          if( nAlloc==MX_FILE_SZ || j>=MX_FILE_SZ ){
            if( eVerbosity ){
              fprintf(stderr, "Input database too big: max %d bytes\n",
                      MX_FILE_SZ);
            }
            sqlite3_free(a);
            return -1;
          }
          newSize = nAlloc*2;
          if( newSize<=j ){
            newSize = (j+4096)&~4095;
          }
          if( newSize>MX_FILE_SZ ){
            if( j>=MX_FILE_SZ ){
              sqlite3_free(a);
              return -1;
            }
            newSize = MX_FILE_SZ;
          }
          a = sqlite3_realloc( a, newSize );
          if( a==0 ){
            fprintf(stderr, "Out of memory!\n");
            exit(1);
          }
          assert( newSize > nAlloc );
          memset(a+nAlloc, 0, newSize - nAlloc);
          nAlloc = newSize;
        }
        if( j>=(unsigned)mx ){
          mx = (j + 4095)&~4095;
          if( mx>MX_FILE_SZ ) mx = MX_FILE_SZ;
        }
        assert( j<nAlloc );
        a[j] = b;
      }
    }else if( zIn[i]=='[' && i<n-3 && isOffset(zIn+i, nIn-i, &k, &i) ){
      continue;
   }else if( zIn[i]=='\n' && i<n-4 && memcmp(zIn+i,"\n--\n",4)==0 ){
      i += 4;
      break;
    }
  }
  *pnDecode = mx;
  *paDecode = a;
  return i;
}

/*
** Progress handler callback.
**
** The argument is the cutoff-time after which all processing should
** stop.  So return non-zero if the cut-off time is exceeded.
*/
static int progress_handler(void *pClientData) {
  FuzzCtx *p = (FuzzCtx*)pClientData;
  sqlite3_int64 iNow = timeOfDay();
  int rc = iNow>=p->iCutoffTime;
  sqlite3_int64 iDiff = iNow - p->iLastCb;
  if( iDiff > p->mxInterval ) p->mxInterval = iDiff;
  p->nCb++;
  if( rc==0 && p->mxCb>0 && p->mxCb<=p->nCb ) rc = 1;
  if( rc && !p->timeoutHit && eVerbosity ){
    printf("Timeout on progress callback %d\n", p->nCb);
    fflush(stdout);
    p->timeoutHit = 1;
  }
  return rc;
}

/*
** Disallow debugging pragmas such as "PRAGMA vdbe_debug" and
** "PRAGMA parser_trace" since they can dramatically increase the
** amount of output without actually testing anything useful.
**
** Also block ATTACH and DETACH
*/
static int block_troublesome_sql(
  void *Notused,
  int eCode,
  const char *zArg1,
  const char *zArg2,
  const char *zArg3,
  const char *zArg4
){
  (void)Notused;
  (void)zArg2;
  (void)zArg3;
  (void)zArg4;
  if( eCode==SQLITE_PRAGMA ){
    if( sqlite3_strnicmp("vdbe_", zArg1, 5)==0
     || sqlite3_stricmp("parser_trace", zArg1)==0
     || sqlite3_stricmp("temp_store_directory", zArg1)==0
    ){
      return SQLITE_DENY;
    }
  }else if( (eCode==SQLITE_ATTACH || eCode==SQLITE_DETACH)
            && zArg1 && zArg1[0] ){
    return SQLITE_DENY;
  }
  return SQLITE_OK;
}

/*
** Run the SQL text
*/
static int runDbSql(sqlite3 *db, const char *zSql){
  int rc;
  sqlite3_stmt *pStmt;
  while( isspace(zSql[0]) ) zSql++;
  if( zSql[0]==0 ) return SQLITE_OK;
  if( eVerbosity>=3 ){
    printf("RUNNING-SQL: [%s]\n", zSql);
    fflush(stdout);
  }
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc==SQLITE_OK ){
    while( (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
      if( eVerbosity>=4 ){
        int j;
        for(j=0; j<sqlite3_column_count(pStmt); j++){
          if( j ) printf(",");
          switch( sqlite3_column_type(pStmt, j) ){
            case SQLITE_NULL: {
              printf("NULL");
              break;
            }
            case SQLITE_INTEGER:
            case SQLITE_FLOAT: {
              printf("%s", sqlite3_column_text(pStmt, j));
              break;
            }
            case SQLITE_BLOB: {
              int n = sqlite3_column_bytes(pStmt, j);
              int i;
              const unsigned char *a;
              a = (const unsigned char*)sqlite3_column_blob(pStmt, j);
              printf("x'");
              for(i=0; i<n; i++){
                printf("%02x", a[i]);
              }
              printf("'");
              break;
            }
            case SQLITE_TEXT: {
              int n = sqlite3_column_bytes(pStmt, j);
              int i;
              const unsigned char *a;
              a = (const unsigned char*)sqlite3_column_blob(pStmt, j);
              printf("'");
              for(i=0; i<n; i++){
                if( a[i]=='\'' ){
                  printf("''");
                }else{
                  putchar(a[i]);
                }
              }
              printf("'");
              break;
            }
          } /* End switch() */
        } /* End for() */
        printf("\n");
        fflush(stdout);
      } /* End if( eVerbosity>=4 ) */
    } /* End while( SQLITE_ROW */
    if( rc!=SQLITE_DONE && eVerbosity>=3 ){
      printf("SQL-ERROR: (%d) %s\n", rc, sqlite3_errmsg(db));
      fflush(stdout);
    }
  }else if( eVerbosity>=3 ){
    printf("SQL-ERROR (%d): %s\n", rc, sqlite3_errmsg(db));
    fflush(stdout);    
  } /* End if( SQLITE_OK ) */
  return sqlite3_finalize(pStmt);
}

/* Invoke this routine to run a single test case */
int runCombinedDbSqlInput(const uint8_t *aData, size_t nByte){
  int rc;                    /* SQLite API return value */
  int iSql;                  /* Index in aData[] of start of SQL */
  unsigned char *aDb = 0;    /* Decoded database content */
  int nDb = 0;               /* Size of the decoded database */
  int i;                     /* Loop counter */
  int j;                     /* Start of current SQL statement */
  char *zSql = 0;            /* SQL text to run */
  int nSql;                  /* Bytes of SQL text */
  FuzzCtx cx;                /* Fuzzing context */

  if( nByte<10 ) return 0;
  if( sqlite3_initialize() ) return 0;
  if( sqlite3_memory_used()!=0 ){
    int nAlloc = 0;
    int nNotUsed = 0;
    sqlite3_status(SQLITE_STATUS_MALLOC_COUNT, &nAlloc, &nNotUsed, 0);
    fprintf(stderr,"Memory leak in mutator: %lld bytes in %d allocations\n",
            sqlite3_memory_used(), nAlloc);
    exit(1);
  }
  memset(&cx, 0, sizeof(cx));
  iSql = decodeDatabase((unsigned char*)aData, (int)nByte, &aDb, &nDb);
  if( iSql<0 ) return 0;
  nSql = nByte - iSql;
  if( eVerbosity>=2 ){
    printf(
      "****** %d-byte input, %d-byte database, %d-byte script "
      "******\n", (int)nByte, nDb, nSql);
    fflush(stdout);
  }
  rc = sqlite3_open(0, &cx.db);
  if( rc ) return 1;
  if( bVdbeDebug ){
    sqlite3_exec(cx.db, "PRAGMA vdbe_debug=ON", 0, 0, 0);
  }

  /* Invoke the progress handler frequently to check to see if we
  ** are taking too long.  The progress handler will return true
  ** (which will block further processing) if more than iTimeout seconds have
  ** elapsed since the start of the test.
  */
  cx.iLastCb = timeOfDay();
  cx.iCutoffTime = cx.iLastCb + iTimeout;  /* Now + iTimeout seconds */
  cx.mxCb = mxProgressCb;
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  sqlite3_progress_handler(cx.db, 10, progress_handler, (void*)&cx);
#endif

  /* Set a limit on the maximum size of a prepared statement, and the
  ** maximum length of a string or blob */
  if( vdbeOpLimit>0 ){
    sqlite3_limit(cx.db, SQLITE_LIMIT_VDBE_OP, vdbeOpLimit);
  }
  if( lengthLimit>0 ){
    sqlite3_limit(cx.db, SQLITE_LIMIT_LENGTH, lengthLimit);
  }

  if( nDb>=20 && aDb[18]==2 && aDb[19]==2 ){
    aDb[18] = aDb[19] = 1;
  }
  rc = sqlite3_deserialize(cx.db, "main", aDb, nDb, nDb,
          SQLITE_DESERIALIZE_RESIZEABLE |
          SQLITE_DESERIALIZE_FREEONCLOSE);
  if( rc ){
    fprintf(stderr, "sqlite3_deserialize() failed with %d\n", rc);
    goto testrun_finished;
  }
  if( maxDbSize>0 ){
    sqlite3_int64 x = maxDbSize;
    sqlite3_file_control(cx.db, "main", SQLITE_FCNTL_SIZE_LIMIT, &x);
  }

  /* Block debug pragmas and ATTACH/DETACH.  But wait until after
  ** deserialize to do this because deserialize depends on ATTACH */
  sqlite3_set_authorizer(cx.db, block_troublesome_sql, 0);

  /* Consistent PRNG seed */
  sqlite3_randomness(0,0);

  zSql = sqlite3_malloc( nSql + 1 );
  if( zSql==0 ){
    fprintf(stderr, "Out of memory!\n");
  }else{
    memcpy(zSql, aData+iSql, nSql);
    zSql[nSql] = 0;
    for(i=j=0; zSql[i]; i++){
      if( zSql[i]==';' ){
        char cSaved = zSql[i+1];
        zSql[i+1] = 0;
        if( sqlite3_complete(zSql+j) ){
          rc = runDbSql(cx.db, zSql+j);
          j = i+1;
        }
        zSql[i+1] = cSaved;
        if( rc==SQLITE_INTERRUPT || progress_handler(&cx) ){
          goto testrun_finished;
        }
      }
    }
    if( j<i ){
      runDbSql(cx.db, zSql+j);
    }
  }
testrun_finished:
  sqlite3_free(zSql);
  rc = sqlite3_close(cx.db);
  if( rc!=SQLITE_OK ){
    fprintf(stdout, "sqlite3_close() returns %d\n", rc);
  }
  if( eVerbosity ){
    fprintf(stdout, "Peak memory usages: %f MB\n",
       sqlite3_memory_highwater(1) / 1000000.0);
  }
  if( sqlite3_memory_used()!=0 ){
    int nAlloc = 0;
    int nNotUsed = 0;
    sqlite3_status(SQLITE_STATUS_MALLOC_COUNT, &nAlloc, &nNotUsed, 0);
    fprintf(stderr,"Memory leak: %lld bytes in %d allocations\n",
            sqlite3_memory_used(), nAlloc);
    exit(1);
  }
  return 0;
}

/*
** END of the dbsqlfuzz code
***************************************************************************/

/* Look at a SQL text and try to determine if it begins with a database
** description, such as would be found in a dbsqlfuzz test case.  Return
** true if this does appear to be a dbsqlfuzz test case and false otherwise.
*/
static int isDbSql(unsigned char *a, int n){
  if( n>4 && memcmp(a,"\n--\n",4)==0 ) return 1;
  while( n>0 && isspace(a[0]) ){ a++; n--; }
  if( n>8 && memcmp(a,"53514c69",8)==0 ) return 1;
  return 0;
}


/* Methods for the VHandle object
*/
static int inmemClose(sqlite3_file *pFile){
  VHandle *p = (VHandle*)pFile;
  VFile *pVFile = p->pVFile;
  pVFile->nRef--;
................................................................................
      if( strcmp(z,"prng-seed")==0 ){
        if( i>=argc-1 ) fatalError("missing arguments on %s", argv[i]);
        g.uRandom = atoi(argv[++i]);
      }else
      if( strcmp(z,"quiet")==0 || strcmp(z,"q")==0 ){
        quietFlag = 1;
        verboseFlag = 0;
        eVerbosity = 0;
      }else
      if( strcmp(z,"rebuild")==0 ){
        rebuildFlag = 1;
        openFlags4Data = SQLITE_OPEN_READWRITE;
      }else
      if( strcmp(z,"result-trace")==0 ){
        runFlags |= SQL_OUTPUT;
................................................................................
#ifndef __unix__
        fatalError("timeout is not available on non-unix systems");
#endif
      }else
      if( strcmp(z,"verbose")==0 || strcmp(z,"v")==0 ){
        quietFlag = 0;
        verboseFlag++;
        eVerbosity++;
        if( verboseFlag>1 ) runFlags |= SQL_TRACE;
      }else
      if( strcmp(z,"version")==0 ){
        int ii;
        const char *z;
        printf("SQLite %s %s\n", sqlite3_libversion(), sqlite3_sourceid());
        for(ii=0; (z = sqlite3_compileoption_get(ii))!=0; ii++){
          printf("%s\n", z);
        }
        return 0;
      }else
      {
        fatalError("unknown option: %s", argv[i]);
      }
    }else{
      nSrcDb++;
      azSrcDb = safe_realloc(azSrcDb, nSrcDb*sizeof(azSrcDb[0]));
................................................................................
    /* Reset the in-memory virtual filesystem */
    formatVfs();
    
    /* Run a test using each SQL script against each database.
    */
    if( !verboseFlag && !quietFlag ) printf("%s:", zDbName);
    for(pSql=g.pFirstSql; pSql; pSql=pSql->pNext){
      if( isDbSql(pSql->a, pSql->sz) ){
        sqlite3_snprintf(sizeof(g.zTestName), g.zTestName, "sqlid=%d",pSql->id);
        if( verboseFlag ){
          printf("%s\n", g.zTestName);
          fflush(stdout);
        }else if( !quietFlag ){
          static int prevAmt = -1;
          int idx = pSql->seq;
          int amt = idx*10/(g.nSql);
          if( amt!=prevAmt ){
            printf(" %d%%", amt*10);
            fflush(stdout);
            prevAmt = amt;
          }
        }
        runCombinedDbSqlInput(pSql->a, pSql->sz);
        nTest++;
        g.zTestName[0] = 0;
        continue;
      }
      for(pDb=g.pFirstDb; pDb; pDb=pDb->pNext){
        int openFlags;
        const char *zVfs = "inmem";
        sqlite3_snprintf(sizeof(g.zTestName), g.zTestName, "sqlid=%d,dbid=%d",
                         pSql->id, pDb->id);
        if( verboseFlag ){
          printf("%s\n", g.zTestName);

Added test/fuzzdata8.db.

cannot compute difference between binary files