File:  [ELWIX - Embedded LightWeight unIX -] / embedaddon / sqlite3 / test / threadtest3.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs - revision graph
Tue Feb 21 17:04:16 2012 UTC (12 years, 10 months ago) by misho
Branches: sqlite3, MAIN
CVS tags: v3_7_10, HEAD
sqlite3

    1: 
    2: /*
    3: ** The code in this file runs a few multi-threaded test cases using the
    4: ** SQLite library. It can be compiled to an executable on unix using the
    5: ** following command:
    6: **
    7: **   gcc -O2 threadtest3.c sqlite3.c -ldl -lpthread -lm
    8: **
    9: ** Then run the compiled program. The exit status is non-zero if any tests
   10: ** failed (hopefully there is also some output to stdout to clarify what went
   11: ** wrong).
   12: **
   13: ** There are three parts to the code in this file, in the following order:
   14: **
   15: **   1. Code for the SQL aggregate function md5sum() copied from 
   16: **      tclsqlite.c in the SQLite distribution. The names of all the 
   17: **      types and functions in this section begin with "MD5" or "md5".
   18: **
   19: **   2. A set of utility functions that may be used to implement
   20: **      multi-threaded test cases. These are all called by test code
   21: **      via macros that help with error reporting. The macros are defined
   22: **      immediately below this comment.
   23: **
   24: **   3. The test code itself. And a main() routine to drive the test 
   25: **      code.
   26: */
   27: 
   28: /*************************************************************************
   29: ** Start of test code/infrastructure interface macros.
   30: **
   31: ** The following macros constitute the interface between the test
   32: ** programs and the test infrastructure. Test infrastructure code 
   33: ** does not itself use any of these macros. Test code should not
   34: ** call any of the macroname_x() functions directly.
   35: **
   36: ** See the header comments above the corresponding macroname_x()
   37: ** function for a description of each interface.
   38: */
   39: 
   40: /* Database functions */
   41: #define opendb(w,x,y,z)         (SEL(w), opendb_x(w,x,y,z))
   42: #define closedb(y,z)            (SEL(y), closedb_x(y,z))
   43: 
   44: /* Functions to execute SQL */
   45: #define sql_script(x,y,z)       (SEL(x), sql_script_x(x,y,z))
   46: #define integrity_check(x,y)    (SEL(x), integrity_check_x(x,y))
   47: #define execsql_i64(x,y,...)    (SEL(x), execsql_i64_x(x,y,__VA_ARGS__))
   48: #define execsql_text(x,y,z,...) (SEL(x), execsql_text_x(x,y,z,__VA_ARGS__))
   49: #define execsql(x,y,...)        (SEL(x), (void)execsql_i64_x(x,y,__VA_ARGS__))
   50: 
   51: /* Thread functions */
   52: #define launch_thread(w,x,y,z)  (SEL(w), launch_thread_x(w,x,y,z))
   53: #define join_all_threads(y,z)   (SEL(y), join_all_threads_x(y,z))
   54: 
   55: /* Timer functions */
   56: #define setstoptime(y,z)        (SEL(y), setstoptime_x(y,z))
   57: #define timetostop(z)           (SEL(z), timetostop_x(z))
   58: 
   59: /* Report/clear errors. */
   60: #define test_error(z, ...)      test_error_x(z, sqlite3_mprintf(__VA_ARGS__))
   61: #define clear_error(y,z)        clear_error_x(y, z)
   62: 
   63: /* File-system operations */
   64: #define filesize(y,z)           (SEL(y), filesize_x(y,z))
   65: #define filecopy(x,y,z)         (SEL(x), filecopy_x(x,y,z))
   66: 
   67: /*
   68: ** End of test code/infrastructure interface macros.
   69: *************************************************************************/
   70: 
   71: 
   72: 
   73: 
   74: #include <sqlite3.h>
   75: #include <unistd.h>
   76: #include <stdio.h>
   77: #include <pthread.h>
   78: #include <assert.h>
   79: #include <sys/types.h> 
   80: #include <sys/stat.h> 
   81: #include <string.h>
   82: #include <fcntl.h>
   83: #include <errno.h>
   84: 
   85: /*
   86:  * This code implements the MD5 message-digest algorithm.
   87:  * The algorithm is due to Ron Rivest.  This code was
   88:  * written by Colin Plumb in 1993, no copyright is claimed.
   89:  * This code is in the public domain; do with it what you wish.
   90:  *
   91:  * Equivalent code is available from RSA Data Security, Inc.
   92:  * This code has been tested against that, and is equivalent,
   93:  * except that you don't need to include two pages of legalese
   94:  * with every copy.
   95:  *
   96:  * To compute the message digest of a chunk of bytes, declare an
   97:  * MD5Context structure, pass it to MD5Init, call MD5Update as
   98:  * needed on buffers full of bytes, and then call MD5Final, which
   99:  * will fill a supplied 16-byte array with the digest.
  100:  */
  101: 
  102: /*
  103:  * If compiled on a machine that doesn't have a 32-bit integer,
  104:  * you just set "uint32" to the appropriate datatype for an
  105:  * unsigned 32-bit integer.  For example:
  106:  *
  107:  *       cc -Duint32='unsigned long' md5.c
  108:  *
  109:  */
  110: #ifndef uint32
  111: #  define uint32 unsigned int
  112: #endif
  113: 
  114: struct MD5Context {
  115:   int isInit;
  116:   uint32 buf[4];
  117:   uint32 bits[2];
  118:   unsigned char in[64];
  119: };
  120: typedef struct MD5Context MD5Context;
  121: 
  122: /*
  123:  * Note: this code is harmless on little-endian machines.
  124:  */
  125: static void byteReverse (unsigned char *buf, unsigned longs){
  126:   uint32 t;
  127:   do {
  128:     t = (uint32)((unsigned)buf[3]<<8 | buf[2]) << 16 |
  129:           ((unsigned)buf[1]<<8 | buf[0]);
  130:     *(uint32 *)buf = t;
  131:     buf += 4;
  132:   } while (--longs);
  133: }
  134: /* The four core functions - F1 is optimized somewhat */
  135: 
  136: /* #define F1(x, y, z) (x & y | ~x & z) */
  137: #define F1(x, y, z) (z ^ (x & (y ^ z)))
  138: #define F2(x, y, z) F1(z, x, y)
  139: #define F3(x, y, z) (x ^ y ^ z)
  140: #define F4(x, y, z) (y ^ (x | ~z))
  141: 
  142: /* This is the central step in the MD5 algorithm. */
  143: #define MD5STEP(f, w, x, y, z, data, s) \
  144:   ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
  145: 
  146: /*
  147:  * The core of the MD5 algorithm, this alters an existing MD5 hash to
  148:  * reflect the addition of 16 longwords of new data.  MD5Update blocks
  149:  * the data and converts bytes into longwords for this routine.
  150:  */
  151: static void MD5Transform(uint32 buf[4], const uint32 in[16]){
  152:   register uint32 a, b, c, d;
  153: 
  154:   a = buf[0];
  155:   b = buf[1];
  156:   c = buf[2];
  157:   d = buf[3];
  158: 
  159:   MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478,  7);
  160:   MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12);
  161:   MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17);
  162:   MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22);
  163:   MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf,  7);
  164:   MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12);
  165:   MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17);
  166:   MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22);
  167:   MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8,  7);
  168:   MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12);
  169:   MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17);
  170:   MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22);
  171:   MD5STEP(F1, a, b, c, d, in[12]+0x6b901122,  7);
  172:   MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12);
  173:   MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17);
  174:   MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22);
  175: 
  176:   MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562,  5);
  177:   MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340,  9);
  178:   MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14);
  179:   MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20);
  180:   MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d,  5);
  181:   MD5STEP(F2, d, a, b, c, in[10]+0x02441453,  9);
  182:   MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14);
  183:   MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20);
  184:   MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6,  5);
  185:   MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6,  9);
  186:   MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14);
  187:   MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20);
  188:   MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905,  5);
  189:   MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8,  9);
  190:   MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14);
  191:   MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20);
  192: 
  193:   MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942,  4);
  194:   MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11);
  195:   MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16);
  196:   MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23);
  197:   MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44,  4);
  198:   MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11);
  199:   MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16);
  200:   MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23);
  201:   MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6,  4);
  202:   MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11);
  203:   MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16);
  204:   MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23);
  205:   MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039,  4);
  206:   MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11);
  207:   MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16);
  208:   MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23);
  209: 
  210:   MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244,  6);
  211:   MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10);
  212:   MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15);
  213:   MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21);
  214:   MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3,  6);
  215:   MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10);
  216:   MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15);
  217:   MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21);
  218:   MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f,  6);
  219:   MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10);
  220:   MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15);
  221:   MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21);
  222:   MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82,  6);
  223:   MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10);
  224:   MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15);
  225:   MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21);
  226: 
  227:   buf[0] += a;
  228:   buf[1] += b;
  229:   buf[2] += c;
  230:   buf[3] += d;
  231: }
  232: 
  233: /*
  234:  * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
  235:  * initialization constants.
  236:  */
  237: static void MD5Init(MD5Context *ctx){
  238:   ctx->isInit = 1;
  239:   ctx->buf[0] = 0x67452301;
  240:   ctx->buf[1] = 0xefcdab89;
  241:   ctx->buf[2] = 0x98badcfe;
  242:   ctx->buf[3] = 0x10325476;
  243:   ctx->bits[0] = 0;
  244:   ctx->bits[1] = 0;
  245: }
  246: 
  247: /*
  248:  * Update context to reflect the concatenation of another buffer full
  249:  * of bytes.
  250:  */
  251: static 
  252: void MD5Update(MD5Context *ctx, const unsigned char *buf, unsigned int len){
  253:   uint32 t;
  254: 
  255:   /* Update bitcount */
  256: 
  257:   t = ctx->bits[0];
  258:   if ((ctx->bits[0] = t + ((uint32)len << 3)) < t)
  259:     ctx->bits[1]++; /* Carry from low to high */
  260:   ctx->bits[1] += len >> 29;
  261: 
  262:   t = (t >> 3) & 0x3f;    /* Bytes already in shsInfo->data */
  263: 
  264:   /* Handle any leading odd-sized chunks */
  265: 
  266:   if ( t ) {
  267:     unsigned char *p = (unsigned char *)ctx->in + t;
  268: 
  269:     t = 64-t;
  270:     if (len < t) {
  271:       memcpy(p, buf, len);
  272:       return;
  273:     }
  274:     memcpy(p, buf, t);
  275:     byteReverse(ctx->in, 16);
  276:     MD5Transform(ctx->buf, (uint32 *)ctx->in);
  277:     buf += t;
  278:     len -= t;
  279:   }
  280: 
  281:   /* Process data in 64-byte chunks */
  282: 
  283:   while (len >= 64) {
  284:     memcpy(ctx->in, buf, 64);
  285:     byteReverse(ctx->in, 16);
  286:     MD5Transform(ctx->buf, (uint32 *)ctx->in);
  287:     buf += 64;
  288:     len -= 64;
  289:   }
  290: 
  291:   /* Handle any remaining bytes of data. */
  292: 
  293:   memcpy(ctx->in, buf, len);
  294: }
  295: 
  296: /*
  297:  * Final wrapup - pad to 64-byte boundary with the bit pattern 
  298:  * 1 0* (64-bit count of bits processed, MSB-first)
  299:  */
  300: static void MD5Final(unsigned char digest[16], MD5Context *ctx){
  301:   unsigned count;
  302:   unsigned char *p;
  303: 
  304:   /* Compute number of bytes mod 64 */
  305:   count = (ctx->bits[0] >> 3) & 0x3F;
  306: 
  307:   /* Set the first char of padding to 0x80.  This is safe since there is
  308:      always at least one byte free */
  309:   p = ctx->in + count;
  310:   *p++ = 0x80;
  311: 
  312:   /* Bytes of padding needed to make 64 bytes */
  313:   count = 64 - 1 - count;
  314: 
  315:   /* Pad out to 56 mod 64 */
  316:   if (count < 8) {
  317:     /* Two lots of padding:  Pad the first block to 64 bytes */
  318:     memset(p, 0, count);
  319:     byteReverse(ctx->in, 16);
  320:     MD5Transform(ctx->buf, (uint32 *)ctx->in);
  321: 
  322:     /* Now fill the next block with 56 bytes */
  323:     memset(ctx->in, 0, 56);
  324:   } else {
  325:     /* Pad block to 56 bytes */
  326:     memset(p, 0, count-8);
  327:   }
  328:   byteReverse(ctx->in, 14);
  329: 
  330:   /* Append length in bits and transform */
  331:   ((uint32 *)ctx->in)[ 14 ] = ctx->bits[0];
  332:   ((uint32 *)ctx->in)[ 15 ] = ctx->bits[1];
  333: 
  334:   MD5Transform(ctx->buf, (uint32 *)ctx->in);
  335:   byteReverse((unsigned char *)ctx->buf, 4);
  336:   memcpy(digest, ctx->buf, 16);
  337:   memset(ctx, 0, sizeof(ctx));    /* In case it is sensitive */
  338: }
  339: 
  340: /*
  341: ** Convert a 128-bit MD5 digest into a 32-digit base-16 number.
  342: */
  343: static void MD5DigestToBase16(unsigned char *digest, char *zBuf){
  344:   static char const zEncode[] = "0123456789abcdef";
  345:   int i, j;
  346: 
  347:   for(j=i=0; i<16; i++){
  348:     int a = digest[i];
  349:     zBuf[j++] = zEncode[(a>>4)&0xf];
  350:     zBuf[j++] = zEncode[a & 0xf];
  351:   }
  352:   zBuf[j] = 0;
  353: }
  354: 
  355: /*
  356: ** During testing, the special md5sum() aggregate function is available.
  357: ** inside SQLite.  The following routines implement that function.
  358: */
  359: static void md5step(sqlite3_context *context, int argc, sqlite3_value **argv){
  360:   MD5Context *p;
  361:   int i;
  362:   if( argc<1 ) return;
  363:   p = sqlite3_aggregate_context(context, sizeof(*p));
  364:   if( p==0 ) return;
  365:   if( !p->isInit ){
  366:     MD5Init(p);
  367:   }
  368:   for(i=0; i<argc; i++){
  369:     const char *zData = (char*)sqlite3_value_text(argv[i]);
  370:     if( zData ){
  371:       MD5Update(p, (unsigned char*)zData, strlen(zData));
  372:     }
  373:   }
  374: }
  375: static void md5finalize(sqlite3_context *context){
  376:   MD5Context *p;
  377:   unsigned char digest[16];
  378:   char zBuf[33];
  379:   p = sqlite3_aggregate_context(context, sizeof(*p));
  380:   MD5Final(digest,p);
  381:   MD5DigestToBase16(digest, zBuf);
  382:   sqlite3_result_text(context, zBuf, -1, SQLITE_TRANSIENT);
  383: }
  384: 
  385: /*************************************************************************
  386: ** End of copied md5sum() code.
  387: */
  388: 
  389: typedef sqlite3_int64 i64;
  390: 
  391: typedef struct Error Error;
  392: typedef struct Sqlite Sqlite;
  393: typedef struct Statement Statement;
  394: 
  395: typedef struct Threadset Threadset;
  396: typedef struct Thread Thread;
  397: 
  398: /* Total number of errors in this process so far. */
  399: static int nGlobalErr = 0;
  400: 
  401: /* Set to true to run in "process" instead of "thread" mode. */
  402: static int bProcessMode = 0;
  403: 
  404: struct Error {
  405:   int rc;
  406:   int iLine;
  407:   char *zErr;
  408: };
  409: 
  410: struct Sqlite {
  411:   sqlite3 *db;                    /* Database handle */
  412:   Statement *pCache;              /* Linked list of cached statements */
  413:   int nText;                      /* Size of array at aText[] */
  414:   char **aText;                   /* Stored text results */
  415: };
  416: 
  417: struct Statement {
  418:   sqlite3_stmt *pStmt;            /* Pre-compiled statement handle */
  419:   Statement *pNext;               /* Next statement in linked-list */
  420: };
  421: 
  422: struct Thread {
  423:   int iTid;                       /* Thread number within test */
  424:   int iArg;                       /* Integer argument passed by caller */
  425: 
  426:   pthread_t tid;                  /* Thread id */
  427:   char *(*xProc)(int, int);       /* Thread main proc */
  428:   Thread *pNext;                  /* Next in this list of threads */
  429: };
  430: 
  431: struct Threadset {
  432:   int iMaxTid;                    /* Largest iTid value allocated so far */
  433:   Thread *pThread;                /* Linked list of threads */
  434: };
  435: 
  436: static void free_err(Error *p){
  437:   sqlite3_free(p->zErr);
  438:   p->zErr = 0;
  439:   p->rc = 0;
  440: }
  441: 
  442: static void print_err(Error *p){
  443:   if( p->rc!=SQLITE_OK ){
  444:     printf("Error: (%d) \"%s\" at line %d\n", p->rc, p->zErr, p->iLine);
  445:     nGlobalErr++;
  446:   }
  447: }
  448: 
  449: static void print_and_free_err(Error *p){
  450:   print_err(p);
  451:   free_err(p);
  452: }
  453: 
  454: static void system_error(Error *pErr, int iSys){
  455:   pErr->rc = iSys;
  456:   pErr->zErr = (char *)sqlite3_malloc(512);
  457:   strerror_r(iSys, pErr->zErr, 512);
  458:   pErr->zErr[511] = '\0';
  459: }
  460: 
  461: static void sqlite_error(
  462:   Error *pErr, 
  463:   Sqlite *pDb, 
  464:   const char *zFunc
  465: ){
  466:   pErr->rc = sqlite3_errcode(pDb->db);
  467:   pErr->zErr = sqlite3_mprintf(
  468:       "sqlite3_%s() - %s (%d)", zFunc, sqlite3_errmsg(pDb->db),
  469:       sqlite3_extended_errcode(pDb->db)
  470:   );
  471: }
  472: 
  473: static void test_error_x(
  474:   Error *pErr,
  475:   char *zErr
  476: ){
  477:   if( pErr->rc==SQLITE_OK ){
  478:     pErr->rc = 1;
  479:     pErr->zErr = zErr;
  480:   }else{
  481:     sqlite3_free(zErr);
  482:   }
  483: }
  484: 
  485: static void clear_error_x(
  486:   Error *pErr,
  487:   int rc
  488: ){
  489:   if( pErr->rc==rc ){
  490:     pErr->rc = SQLITE_OK;
  491:     sqlite3_free(pErr->zErr);
  492:     pErr->zErr = 0;
  493:   }
  494: }
  495: 
  496: static int busyhandler(void *pArg, int n){
  497:   usleep(10*1000);
  498:   return 1;
  499: }
  500: 
  501: static void opendb_x(
  502:   Error *pErr,                    /* IN/OUT: Error code */
  503:   Sqlite *pDb,                    /* OUT: Database handle */
  504:   const char *zFile,              /* Database file name */
  505:   int bDelete                     /* True to delete db file before opening */
  506: ){
  507:   if( pErr->rc==SQLITE_OK ){
  508:     int rc;
  509:     if( bDelete ) unlink(zFile);
  510:     rc = sqlite3_open(zFile, &pDb->db);
  511:     if( rc ){
  512:       sqlite_error(pErr, pDb, "open");
  513:       sqlite3_close(pDb->db);
  514:       pDb->db = 0;
  515:     }else{
  516:       sqlite3_create_function(
  517:           pDb->db, "md5sum", -1, SQLITE_UTF8, 0, 0, md5step, md5finalize
  518:       );
  519:       sqlite3_busy_handler(pDb->db, busyhandler, 0);
  520:       sqlite3_exec(pDb->db, "PRAGMA synchronous=OFF", 0, 0, 0);
  521:     }
  522:   }
  523: }
  524: 
  525: static void closedb_x(
  526:   Error *pErr,                    /* IN/OUT: Error code */
  527:   Sqlite *pDb                     /* OUT: Database handle */
  528: ){
  529:   int rc;
  530:   int i;
  531:   Statement *pIter;
  532:   Statement *pNext;
  533:   for(pIter=pDb->pCache; pIter; pIter=pNext){
  534:     pNext = pIter->pNext;
  535:     sqlite3_finalize(pIter->pStmt);
  536:     sqlite3_free(pIter);
  537:   }
  538:   for(i=0; i<pDb->nText; i++){
  539:     sqlite3_free(pDb->aText[i]);
  540:   }
  541:   sqlite3_free(pDb->aText);
  542:   rc = sqlite3_close(pDb->db);
  543:   if( rc && pErr->rc==SQLITE_OK ){
  544:     pErr->zErr = sqlite3_mprintf("%s", sqlite3_errmsg(pDb->db));
  545:   }
  546:   memset(pDb, 0, sizeof(Sqlite));
  547: }
  548: 
  549: static void sql_script_x(
  550:   Error *pErr,                    /* IN/OUT: Error code */
  551:   Sqlite *pDb,                    /* Database handle */
  552:   const char *zSql                /* SQL script to execute */
  553: ){
  554:   if( pErr->rc==SQLITE_OK ){
  555:     pErr->rc = sqlite3_exec(pDb->db, zSql, 0, 0, &pErr->zErr);
  556:   }
  557: }
  558: 
  559: static Statement *getSqlStatement(
  560:   Error *pErr,                    /* IN/OUT: Error code */
  561:   Sqlite *pDb,                    /* Database handle */
  562:   const char *zSql                /* SQL statement */
  563: ){
  564:   Statement *pRet;
  565:   int rc;
  566: 
  567:   for(pRet=pDb->pCache; pRet; pRet=pRet->pNext){
  568:     if( 0==strcmp(sqlite3_sql(pRet->pStmt), zSql) ){
  569:       return pRet;
  570:     }
  571:   }
  572: 
  573:   pRet = sqlite3_malloc(sizeof(Statement));
  574:   rc = sqlite3_prepare_v2(pDb->db, zSql, -1, &pRet->pStmt, 0);
  575:   if( rc!=SQLITE_OK ){
  576:     sqlite_error(pErr, pDb, "prepare_v2");
  577:     return 0;
  578:   }
  579:   assert( 0==strcmp(sqlite3_sql(pRet->pStmt), zSql) );
  580: 
  581:   pRet->pNext = pDb->pCache;
  582:   pDb->pCache = pRet;
  583:   return pRet;
  584: }
  585: 
  586: static sqlite3_stmt *getAndBindSqlStatement(
  587:   Error *pErr,                    /* IN/OUT: Error code */
  588:   Sqlite *pDb,                    /* Database handle */
  589:   va_list ap                      /* SQL followed by parameters */
  590: ){
  591:   Statement *pStatement;          /* The SQLite statement wrapper */
  592:   sqlite3_stmt *pStmt;            /* The SQLite statement to return */
  593:   int i;                          /* Used to iterate through parameters */
  594: 
  595:   pStatement = getSqlStatement(pErr, pDb, va_arg(ap, const char *));
  596:   if( !pStatement ) return 0;
  597:   pStmt = pStatement->pStmt;
  598:   for(i=1; i<=sqlite3_bind_parameter_count(pStmt); i++){
  599:     const char *zName = sqlite3_bind_parameter_name(pStmt, i);
  600:     void * pArg = va_arg(ap, void*);
  601: 
  602:     switch( zName[1] ){
  603:       case 'i':
  604:         sqlite3_bind_int64(pStmt, i, *(i64 *)pArg);
  605:         break;
  606: 
  607:       default:
  608:         pErr->rc = 1;
  609:         pErr->zErr = sqlite3_mprintf("Cannot discern type: \"%s\"", zName);
  610:         pStmt = 0;
  611:         break;
  612:     }
  613:   }
  614: 
  615:   return pStmt;
  616: }
  617: 
  618: static i64 execsql_i64_x(
  619:   Error *pErr,                    /* IN/OUT: Error code */
  620:   Sqlite *pDb,                    /* Database handle */
  621:   ...                             /* SQL and pointers to parameter values */
  622: ){
  623:   i64 iRet = 0;
  624:   if( pErr->rc==SQLITE_OK ){
  625:     sqlite3_stmt *pStmt;          /* SQL statement to execute */
  626:     va_list ap;                   /* ... arguments */
  627:     int i;                        /* Used to iterate through parameters */
  628:     va_start(ap, pDb);
  629:     pStmt = getAndBindSqlStatement(pErr, pDb, ap);
  630:     if( pStmt ){
  631:       int rc;
  632:       int first = 1;
  633:       while( SQLITE_ROW==sqlite3_step(pStmt) ){
  634:         if( first && sqlite3_column_count(pStmt)>0 ){
  635:           iRet = sqlite3_column_int64(pStmt, 0);
  636:         }
  637:         first = 0;
  638:       }
  639:       if( SQLITE_OK!=sqlite3_reset(pStmt) ){
  640:         sqlite_error(pErr, pDb, "reset");
  641:       }
  642:     }
  643:     va_end(ap);
  644:   }
  645:   return iRet;
  646: }
  647: 
  648: static char * execsql_text_x(
  649:   Error *pErr,                    /* IN/OUT: Error code */
  650:   Sqlite *pDb,                    /* Database handle */
  651:   int iSlot,                      /* Db handle slot to store text in */
  652:   ...                             /* SQL and pointers to parameter values */
  653: ){
  654:   char *zRet = 0;
  655: 
  656:   if( iSlot>=pDb->nText ){
  657:     int nByte = sizeof(char *)*(iSlot+1);
  658:     pDb->aText = (char **)sqlite3_realloc(pDb->aText, nByte);
  659:     memset(&pDb->aText[pDb->nText], 0, sizeof(char*)*(iSlot+1-pDb->nText));
  660:     pDb->nText = iSlot+1;
  661:   }
  662: 
  663:   if( pErr->rc==SQLITE_OK ){
  664:     sqlite3_stmt *pStmt;          /* SQL statement to execute */
  665:     va_list ap;                   /* ... arguments */
  666:     int i;                        /* Used to iterate through parameters */
  667:     va_start(ap, iSlot);
  668:     pStmt = getAndBindSqlStatement(pErr, pDb, ap);
  669:     if( pStmt ){
  670:       int rc;
  671:       int first = 1;
  672:       while( SQLITE_ROW==sqlite3_step(pStmt) ){
  673:         if( first && sqlite3_column_count(pStmt)>0 ){
  674:           zRet = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 0));
  675:           sqlite3_free(pDb->aText[iSlot]);
  676:           pDb->aText[iSlot] = zRet;
  677:         }
  678:         first = 0;
  679:       }
  680:       if( SQLITE_OK!=sqlite3_reset(pStmt) ){
  681:         sqlite_error(pErr, pDb, "reset");
  682:       }
  683:     }
  684:     va_end(ap);
  685:   }
  686: 
  687:   return zRet;
  688: }
  689: 
  690: static void integrity_check_x(
  691:   Error *pErr,                    /* IN/OUT: Error code */
  692:   Sqlite *pDb                     /* Database handle */
  693: ){
  694:   if( pErr->rc==SQLITE_OK ){
  695:     Statement *pStatement;        /* Statement to execute */
  696:     int rc;                       /* Return code */
  697:     char *zErr = 0;               /* Integrity check error */
  698: 
  699:     pStatement = getSqlStatement(pErr, pDb, "PRAGMA integrity_check");
  700:     if( pStatement ){
  701:       sqlite3_stmt *pStmt = pStatement->pStmt;
  702:       while( SQLITE_ROW==sqlite3_step(pStmt) ){
  703:         const char *z = sqlite3_column_text(pStmt, 0);
  704:         if( strcmp(z, "ok") ){
  705:           if( zErr==0 ){
  706:             zErr = sqlite3_mprintf("%s", z);
  707:           }else{
  708:             zErr = sqlite3_mprintf("%z\n%s", zErr, z);
  709:           }
  710:         }
  711:       }
  712:       sqlite3_reset(pStmt);
  713: 
  714:       if( zErr ){
  715:         pErr->zErr = zErr;
  716:         pErr->rc = 1;
  717:       }
  718:     }
  719:   }
  720: }
  721: 
  722: static void *launch_thread_main(void *pArg){
  723:   Thread *p = (Thread *)pArg;
  724:   return (void *)p->xProc(p->iTid, p->iArg);
  725: }
  726: 
  727: static void launch_thread_x(
  728:   Error *pErr,                    /* IN/OUT: Error code */
  729:   Threadset *pThreads,            /* Thread set */
  730:   char *(*xProc)(int, int),       /* Proc to run */
  731:   int iArg                        /* Argument passed to thread proc */
  732: ){
  733:   if( pErr->rc==SQLITE_OK ){
  734:     int iTid = ++pThreads->iMaxTid;
  735:     Thread *p;
  736:     int rc;
  737: 
  738:     p = (Thread *)sqlite3_malloc(sizeof(Thread));
  739:     memset(p, 0, sizeof(Thread));
  740:     p->iTid = iTid;
  741:     p->iArg = iArg;
  742:     p->xProc = xProc;
  743: 
  744:     rc = pthread_create(&p->tid, NULL, launch_thread_main, (void *)p);
  745:     if( rc!=0 ){
  746:       system_error(pErr, rc);
  747:       sqlite3_free(p);
  748:     }else{
  749:       p->pNext = pThreads->pThread;
  750:       pThreads->pThread = p;
  751:     }
  752:   }
  753: }
  754: 
  755: static void join_all_threads_x(
  756:   Error *pErr,                    /* IN/OUT: Error code */
  757:   Threadset *pThreads             /* Thread set */
  758: ){
  759:   Thread *p;
  760:   Thread *pNext;
  761:   for(p=pThreads->pThread; p; p=pNext){
  762:     void *ret;
  763:     pNext = p->pNext;
  764:     int rc;
  765:     rc = pthread_join(p->tid, &ret);
  766:     if( rc!=0 ){
  767:       if( pErr->rc==SQLITE_OK ) system_error(pErr, rc);
  768:     }else{
  769:       printf("Thread %d says: %s\n", p->iTid, (ret==0 ? "..." : (char *)ret));
  770:     }
  771:     sqlite3_free(p);
  772:   }
  773:   pThreads->pThread = 0;
  774: }
  775: 
  776: static i64 filesize_x(
  777:   Error *pErr,
  778:   const char *zFile
  779: ){
  780:   i64 iRet = 0;
  781:   if( pErr->rc==SQLITE_OK ){
  782:     struct stat sStat;
  783:     if( stat(zFile, &sStat) ){
  784:       iRet = -1;
  785:     }else{
  786:       iRet = sStat.st_size;
  787:     }
  788:   }
  789:   return iRet;
  790: }
  791: 
  792: static void filecopy_x(
  793:   Error *pErr,
  794:   const char *zFrom,
  795:   const char *zTo
  796: ){
  797:   if( pErr->rc==SQLITE_OK ){
  798:     i64 nByte = filesize_x(pErr, zFrom);
  799:     if( nByte<0 ){
  800:       test_error_x(pErr, sqlite3_mprintf("no such file: %s", zFrom));
  801:     }else{
  802:       i64 iOff;
  803:       char aBuf[1024];
  804:       int fd1;
  805:       int fd2;
  806:       unlink(zTo);
  807: 
  808:       fd1 = open(zFrom, O_RDONLY);
  809:       if( fd1<0 ){
  810:         system_error(pErr, errno);
  811:         return;
  812:       }
  813:       fd2 = open(zTo, O_RDWR|O_CREAT|O_EXCL, 0644);
  814:       if( fd2<0 ){
  815:         system_error(pErr, errno);
  816:         close(fd1);
  817:         return;
  818:       }
  819: 
  820:       iOff = 0;
  821:       while( iOff<nByte ){
  822:         int nCopy = sizeof(aBuf);
  823:         if( nCopy+iOff>nByte ){
  824:           nCopy = nByte - iOff;
  825:         }
  826:         if( nCopy!=read(fd1, aBuf, nCopy) ){
  827:           system_error(pErr, errno);
  828:           break;
  829:         }
  830:         if( nCopy!=write(fd2, aBuf, nCopy) ){
  831:           system_error(pErr, errno);
  832:           break;
  833:         }
  834:         iOff += nCopy;
  835:       }
  836: 
  837:       close(fd1);
  838:       close(fd2);
  839:     }
  840:   }
  841: }
  842: 
  843: /* 
  844: ** Used by setstoptime() and timetostop().
  845: */
  846: static double timelimit = 0.0;
  847: static sqlite3_vfs *pTimelimitVfs = 0;
  848: 
  849: static void setstoptime_x(
  850:   Error *pErr,                    /* IN/OUT: Error code */
  851:   int nMs                         /* Milliseconds until "stop time" */
  852: ){
  853:   if( pErr->rc==SQLITE_OK ){
  854:     double t;
  855:     int rc;
  856:     pTimelimitVfs = sqlite3_vfs_find(0);
  857:     rc = pTimelimitVfs->xCurrentTime(pTimelimitVfs, &t);
  858:     if( rc!=SQLITE_OK ){
  859:       pErr->rc = rc;
  860:     }else{
  861:       timelimit = t + ((double)nMs)/(1000.0*60.0*60.0*24.0);
  862:     }
  863:   }
  864: }
  865: 
  866: static int timetostop_x(
  867:   Error *pErr                     /* IN/OUT: Error code */
  868: ){
  869:   int ret = 1;
  870:   if( pErr->rc==SQLITE_OK ){
  871:     double t;
  872:     int rc;
  873:     rc = pTimelimitVfs->xCurrentTime(pTimelimitVfs, &t);
  874:     if( rc!=SQLITE_OK ){
  875:       pErr->rc = rc;
  876:     }else{
  877:       ret = (t >= timelimit);
  878:     }
  879:   }
  880:   return ret;
  881: }
  882: 
  883: /* 
  884: ** The "Set Error Line" macro.
  885: */
  886: #define SEL(e) ((e)->iLine = ((e)->rc ? (e)->iLine : __LINE__))
  887: 
  888: 
  889: /*************************************************************************
  890: **************************************************************************
  891: **************************************************************************
  892: ** End infrastructure. Begin tests.
  893: */
  894: 
  895: #define WALTHREAD1_NTHREAD  10
  896: #define WALTHREAD3_NTHREAD  6
  897: 
  898: static char *walthread1_thread(int iTid, int iArg){
  899:   Error err = {0};                /* Error code and message */
  900:   Sqlite db = {0};                /* SQLite database connection */
  901:   int nIter = 0;                  /* Iterations so far */
  902: 
  903:   opendb(&err, &db, "test.db", 0);
  904:   while( !timetostop(&err) ){
  905:     const char *azSql[] = {
  906:       "SELECT md5sum(x) FROM t1 WHERE rowid != (SELECT max(rowid) FROM t1)",
  907:       "SELECT x FROM t1 WHERE rowid = (SELECT max(rowid) FROM t1)",
  908:     };
  909:     char *z1, *z2, *z3;
  910: 
  911:     execsql(&err, &db, "BEGIN");
  912:     integrity_check(&err, &db);
  913:     z1 = execsql_text(&err, &db, 1, azSql[0]);
  914:     z2 = execsql_text(&err, &db, 2, azSql[1]);
  915:     z3 = execsql_text(&err, &db, 3, azSql[0]);
  916:     execsql(&err, &db, "COMMIT");
  917: 
  918:     if( strcmp(z1, z2) || strcmp(z1, z3) ){
  919:       test_error(&err, "Failed read: %s %s %s", z1, z2, z3);
  920:     }
  921: 
  922:     sql_script(&err, &db,
  923:         "BEGIN;"
  924:           "INSERT INTO t1 VALUES(randomblob(100));"
  925:           "INSERT INTO t1 VALUES(randomblob(100));"
  926:           "INSERT INTO t1 SELECT md5sum(x) FROM t1;"
  927:         "COMMIT;"
  928:     );
  929:     nIter++;
  930:   }
  931:   closedb(&err, &db);
  932: 
  933:   print_and_free_err(&err);
  934:   return sqlite3_mprintf("%d iterations", nIter);
  935: }
  936: 
  937: static char *walthread1_ckpt_thread(int iTid, int iArg){
  938:   Error err = {0};                /* Error code and message */
  939:   Sqlite db = {0};                /* SQLite database connection */
  940:   int nCkpt = 0;                  /* Checkpoints so far */
  941: 
  942:   opendb(&err, &db, "test.db", 0);
  943:   while( !timetostop(&err) ){
  944:     usleep(500*1000);
  945:     execsql(&err, &db, "PRAGMA wal_checkpoint");
  946:     if( err.rc==SQLITE_OK ) nCkpt++;
  947:     clear_error(&err, SQLITE_BUSY);
  948:   }
  949:   closedb(&err, &db);
  950: 
  951:   print_and_free_err(&err);
  952:   return sqlite3_mprintf("%d checkpoints", nCkpt);
  953: }
  954: 
  955: static void walthread1(int nMs){
  956:   Error err = {0};                /* Error code and message */
  957:   Sqlite db = {0};                /* SQLite database connection */
  958:   Threadset threads = {0};        /* Test threads */
  959:   int i;                          /* Iterator variable */
  960: 
  961:   opendb(&err, &db, "test.db", 1);
  962:   sql_script(&err, &db,
  963:       "PRAGMA journal_mode = WAL;"
  964:       "CREATE TABLE t1(x PRIMARY KEY);"
  965:       "INSERT INTO t1 VALUES(randomblob(100));"
  966:       "INSERT INTO t1 VALUES(randomblob(100));"
  967:       "INSERT INTO t1 SELECT md5sum(x) FROM t1;"
  968:   );
  969: 
  970:   setstoptime(&err, nMs);
  971:   for(i=0; i<WALTHREAD1_NTHREAD; i++){
  972:     launch_thread(&err, &threads, walthread1_thread, 0);
  973:   }
  974:   launch_thread(&err, &threads, walthread1_ckpt_thread, 0);
  975:   join_all_threads(&err, &threads);
  976: 
  977:   print_and_free_err(&err);
  978: }
  979: 
  980: static char *walthread2_thread(int iTid, int iArg){
  981:   Error err = {0};                /* Error code and message */
  982:   Sqlite db = {0};                /* SQLite database connection */
  983:   int anTrans[2] = {0, 0};        /* Number of WAL and Rollback transactions */
  984: 
  985:   const char *zJournal = "PRAGMA journal_mode = WAL";
  986:   if( iArg ){ zJournal = "PRAGMA journal_mode = DELETE"; }
  987: 
  988:   while( !timetostop(&err) ){
  989:     int journal_exists = 0;
  990:     int wal_exists = 0;
  991: 
  992:     opendb(&err, &db, "test.db", 0);
  993: 
  994:     sql_script(&err, &db, zJournal);
  995:     clear_error(&err, SQLITE_BUSY);
  996:     sql_script(&err, &db, "BEGIN");
  997:     sql_script(&err, &db, "INSERT INTO t1 VALUES(NULL, randomblob(100))");
  998: 
  999:     journal_exists = (filesize(&err, "test.db-journal") >= 0);
 1000:     wal_exists = (filesize(&err, "test.db-wal") >= 0);
 1001:     if( (journal_exists+wal_exists)!=1 ){
 1002:       test_error(&err, "File system looks incorrect (%d, %d)", 
 1003:           journal_exists, wal_exists
 1004:       );
 1005:     }
 1006:     anTrans[journal_exists]++;
 1007: 
 1008:     sql_script(&err, &db, "COMMIT");
 1009:     integrity_check(&err, &db);
 1010:     closedb(&err, &db);
 1011:   }
 1012: 
 1013:   print_and_free_err(&err);
 1014:   return sqlite3_mprintf("W %d R %d", anTrans[0], anTrans[1]);
 1015: }
 1016: 
 1017: static void walthread2(int nMs){
 1018:   Error err = {0};
 1019:   Sqlite db = {0};
 1020:   Threadset threads = {0};
 1021: 
 1022:   opendb(&err, &db, "test.db", 1);
 1023:   sql_script(&err, &db, "CREATE TABLE t1(x INTEGER PRIMARY KEY, y UNIQUE)");
 1024:   closedb(&err, &db);
 1025: 
 1026:   setstoptime(&err, nMs);
 1027:   launch_thread(&err, &threads, walthread2_thread, 0);
 1028:   launch_thread(&err, &threads, walthread2_thread, 0);
 1029:   launch_thread(&err, &threads, walthread2_thread, 1);
 1030:   launch_thread(&err, &threads, walthread2_thread, 1);
 1031:   join_all_threads(&err, &threads);
 1032: 
 1033:   print_and_free_err(&err);
 1034: }
 1035: 
 1036: static char *walthread3_thread(int iTid, int iArg){
 1037:   Error err = {0};                /* Error code and message */
 1038:   Sqlite db = {0};                /* SQLite database connection */
 1039:   i64 iNextWrite;                 /* Next value this thread will write */
 1040: 
 1041:   opendb(&err, &db, "test.db", 0);
 1042:   sql_script(&err, &db, "PRAGMA wal_autocheckpoint = 10");
 1043: 
 1044:   iNextWrite = iArg+1;
 1045:   while( 1 ){
 1046:     i64 sum1;
 1047:     i64 sum2;
 1048:     int stop = 0;                 /* True to stop executing (test timed out) */
 1049: 
 1050:     while( 0==(stop = timetostop(&err)) ){
 1051:       i64 iMax = execsql_i64(&err, &db, "SELECT max(cnt) FROM t1");
 1052:       if( iMax+1==iNextWrite ) break;
 1053:     }
 1054:     if( stop ) break;
 1055: 
 1056:     sum1 = execsql_i64(&err, &db, "SELECT sum(cnt) FROM t1");
 1057:     sum2 = execsql_i64(&err, &db, "SELECT sum(sum1) FROM t1");
 1058:     execsql_i64(&err, &db, 
 1059:         "INSERT INTO t1 VALUES(:iNextWrite, :iSum1, :iSum2)",
 1060:         &iNextWrite, &sum1, &sum2
 1061:     );
 1062:     integrity_check(&err, &db);
 1063: 
 1064:     iNextWrite += WALTHREAD3_NTHREAD;
 1065:   }
 1066: 
 1067:   closedb(&err, &db);
 1068:   print_and_free_err(&err);
 1069:   return 0;
 1070: }
 1071: 
 1072: static void walthread3(int nMs){
 1073:   Error err = {0};
 1074:   Sqlite db = {0};
 1075:   Threadset threads = {0};
 1076:   int i;
 1077: 
 1078:   opendb(&err, &db, "test.db", 1);
 1079:   sql_script(&err, &db, 
 1080:       "PRAGMA journal_mode = WAL;"
 1081:       "CREATE TABLE t1(cnt PRIMARY KEY, sum1, sum2);"
 1082:       "CREATE INDEX i1 ON t1(sum1);"
 1083:       "CREATE INDEX i2 ON t1(sum2);"
 1084:       "INSERT INTO t1 VALUES(0, 0, 0);"
 1085:   );
 1086:   closedb(&err, &db);
 1087: 
 1088:   setstoptime(&err, nMs);
 1089:   for(i=0; i<WALTHREAD3_NTHREAD; i++){
 1090:     launch_thread(&err, &threads, walthread3_thread, i);
 1091:   }
 1092:   join_all_threads(&err, &threads);
 1093: 
 1094:   print_and_free_err(&err);
 1095: }
 1096: 
 1097: static char *walthread4_reader_thread(int iTid, int iArg){
 1098:   Error err = {0};                /* Error code and message */
 1099:   Sqlite db = {0};                /* SQLite database connection */
 1100: 
 1101:   opendb(&err, &db, "test.db", 0);
 1102:   while( !timetostop(&err) ){
 1103:     integrity_check(&err, &db);
 1104:   }
 1105:   closedb(&err, &db);
 1106: 
 1107:   print_and_free_err(&err);
 1108:   return 0;
 1109: }
 1110: 
 1111: static char *walthread4_writer_thread(int iTid, int iArg){
 1112:   Error err = {0};                /* Error code and message */
 1113:   Sqlite db = {0};                /* SQLite database connection */
 1114:   i64 iRow = 1;
 1115: 
 1116:   opendb(&err, &db, "test.db", 0);
 1117:   sql_script(&err, &db, "PRAGMA wal_autocheckpoint = 15;");
 1118:   while( !timetostop(&err) ){
 1119:     execsql_i64(
 1120:         &err, &db, "REPLACE INTO t1 VALUES(:iRow, randomblob(300))", &iRow
 1121:     );
 1122:     iRow++;
 1123:     if( iRow==10 ) iRow = 0;
 1124:   }
 1125:   closedb(&err, &db);
 1126: 
 1127:   print_and_free_err(&err);
 1128:   return 0;
 1129: }
 1130: 
 1131: static void walthread4(int nMs){
 1132:   Error err = {0};
 1133:   Sqlite db = {0};
 1134:   Threadset threads = {0};
 1135: 
 1136:   opendb(&err, &db, "test.db", 1);
 1137:   sql_script(&err, &db, 
 1138:       "PRAGMA journal_mode = WAL;"
 1139:       "CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE);"
 1140:   );
 1141:   closedb(&err, &db);
 1142: 
 1143:   setstoptime(&err, nMs);
 1144:   launch_thread(&err, &threads, walthread4_reader_thread, 0);
 1145:   launch_thread(&err, &threads, walthread4_writer_thread, 0);
 1146:   join_all_threads(&err, &threads);
 1147: 
 1148:   print_and_free_err(&err);
 1149: }
 1150: 
 1151: static char *walthread5_thread(int iTid, int iArg){
 1152:   Error err = {0};                /* Error code and message */
 1153:   Sqlite db = {0};                /* SQLite database connection */
 1154:   i64 nRow;
 1155: 
 1156:   opendb(&err, &db, "test.db", 0);
 1157:   nRow = execsql_i64(&err, &db, "SELECT count(*) FROM t1");
 1158:   closedb(&err, &db);
 1159: 
 1160:   if( nRow!=65536 ) test_error(&err, "Bad row count: %d", (int)nRow);
 1161:   print_and_free_err(&err);
 1162:   return 0;
 1163: }
 1164: static void walthread5(int nMs){
 1165:   Error err = {0};
 1166:   Sqlite db = {0};
 1167:   Threadset threads = {0};
 1168: 
 1169:   opendb(&err, &db, "test.db", 1);
 1170:   sql_script(&err, &db, 
 1171:       "PRAGMA wal_autocheckpoint = 0;"
 1172:       "PRAGMA page_size = 1024;"
 1173:       "PRAGMA journal_mode = WAL;"
 1174:       "CREATE TABLE t1(x);"
 1175:       "BEGIN;"
 1176:       "INSERT INTO t1 VALUES(randomblob(900));"
 1177:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*     2 */"
 1178:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*     4 */"
 1179:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*     8 */"
 1180:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*    16 */"
 1181:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*    32 */"
 1182:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*    64 */"
 1183:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*   128 */"
 1184:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*   256 */"
 1185:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*   512 */"
 1186:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*  1024 */"
 1187:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*  2048 */"
 1188:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*  4096 */"
 1189:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /*  8192 */"
 1190:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /* 16384 */"
 1191:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /* 32768 */"
 1192:       "INSERT INTO t1 SELECT randomblob(900) FROM t1;      /* 65536 */"
 1193:       "COMMIT;"
 1194:   );
 1195:   filecopy(&err, "test.db", "test_sv.db");
 1196:   filecopy(&err, "test.db-wal", "test_sv.db-wal");
 1197:   closedb(&err, &db);
 1198: 
 1199:   filecopy(&err, "test_sv.db", "test.db");
 1200:   filecopy(&err, "test_sv.db-wal", "test.db-wal");
 1201: 
 1202:   if( err.rc==SQLITE_OK ){
 1203:     printf("  WAL file is %d bytes,", (int)filesize(&err,"test.db-wal"));
 1204:     printf(" DB file is %d.\n", (int)filesize(&err,"test.db"));
 1205:   }
 1206: 
 1207:   setstoptime(&err, nMs);
 1208:   launch_thread(&err, &threads, walthread5_thread, 0);
 1209:   launch_thread(&err, &threads, walthread5_thread, 0);
 1210:   launch_thread(&err, &threads, walthread5_thread, 0);
 1211:   launch_thread(&err, &threads, walthread5_thread, 0);
 1212:   launch_thread(&err, &threads, walthread5_thread, 0);
 1213:   join_all_threads(&err, &threads);
 1214: 
 1215:   if( err.rc==SQLITE_OK ){
 1216:     printf("  WAL file is %d bytes,", (int)filesize(&err,"test.db-wal"));
 1217:     printf(" DB file is %d.\n", (int)filesize(&err,"test.db"));
 1218:   }
 1219: 
 1220:   print_and_free_err(&err);
 1221: }
 1222: 
 1223: /*------------------------------------------------------------------------
 1224: ** Test case "cgt_pager_1"
 1225: */
 1226: #define CALLGRINDTEST1_NROW 10000
 1227: static void cgt_pager_1_populate(Error *pErr, Sqlite *pDb){
 1228:   const char *zInsert = "INSERT INTO t1 VALUES(:iRow, zeroblob(:iBlob))";
 1229:   i64 iRow;
 1230:   sql_script(pErr, pDb, "BEGIN");
 1231:   for(iRow=1; iRow<=CALLGRINDTEST1_NROW; iRow++){
 1232:     i64 iBlob = 600 + (iRow%300);
 1233:     execsql(pErr, pDb, zInsert, &iRow, &iBlob);
 1234:   }
 1235:   sql_script(pErr, pDb, "COMMIT");
 1236: }
 1237: static void cgt_pager_1_update(Error *pErr, Sqlite *pDb){
 1238:   const char *zUpdate = "UPDATE t1 SET b = zeroblob(:iBlob) WHERE a = :iRow";
 1239:   i64 iRow;
 1240:   sql_script(pErr, pDb, "BEGIN");
 1241:   for(iRow=1; iRow<=CALLGRINDTEST1_NROW; iRow++){
 1242:     i64 iBlob = 600 + ((iRow+100)%300);
 1243:     execsql(pErr, pDb, zUpdate, &iBlob, &iRow);
 1244:   }
 1245:   sql_script(pErr, pDb, "COMMIT");
 1246: }
 1247: static void cgt_pager_1_read(Error *pErr, Sqlite *pDb){
 1248:   i64 iRow;
 1249:   sql_script(pErr, pDb, "BEGIN");
 1250:   for(iRow=1; iRow<=CALLGRINDTEST1_NROW; iRow++){
 1251:     execsql(pErr, pDb, "SELECT * FROM t1 WHERE a = :iRow", &iRow);
 1252:   }
 1253:   sql_script(pErr, pDb, "COMMIT");
 1254: }
 1255: static void cgt_pager_1(int nMs){
 1256:   void (*xSub)(Error *, Sqlite *);
 1257:   Error err = {0};
 1258:   Sqlite db = {0};
 1259: 
 1260:   opendb(&err, &db, "test.db", 1);
 1261:   sql_script(&err, &db,
 1262:       "PRAGMA cache_size = 2000;"
 1263:       "PRAGMA page_size = 1024;"
 1264:       "CREATE TABLE t1(a INTEGER PRIMARY KEY, b BLOB);"
 1265:   );
 1266: 
 1267:   xSub = cgt_pager_1_populate; xSub(&err, &db);
 1268:   xSub = cgt_pager_1_update;   xSub(&err, &db);
 1269:   xSub = cgt_pager_1_read;     xSub(&err, &db);
 1270: 
 1271:   closedb(&err, &db);
 1272:   print_and_free_err(&err);
 1273: }
 1274: 
 1275: /*------------------------------------------------------------------------
 1276: ** Test case "dynamic_triggers"
 1277: **
 1278: **   Two threads executing statements that cause deeply nested triggers
 1279: **   to fire. And one thread busily creating and deleting triggers. This
 1280: **   is an attempt to find a bug reported to us.
 1281: */
 1282: 
 1283: static char *dynamic_triggers_1(int iTid, int iArg){
 1284:   Error err = {0};                /* Error code and message */
 1285:   Sqlite db = {0};                /* SQLite database connection */
 1286:   int nDrop = 0;
 1287:   int nCreate = 0;
 1288: 
 1289:   opendb(&err, &db, "test.db", 0);
 1290:   while( !timetostop(&err) ){
 1291:     int i;
 1292: 
 1293:     for(i=1; i<9; i++){
 1294:       char *zSql = sqlite3_mprintf(
 1295:         "CREATE TRIGGER itr%d BEFORE INSERT ON t%d BEGIN "
 1296:           "INSERT INTO t%d VALUES(new.x, new.y);"
 1297:         "END;", i, i, i+1
 1298:       );
 1299:       execsql(&err, &db, zSql);
 1300:       sqlite3_free(zSql);
 1301:       nCreate++;
 1302:     }
 1303: 
 1304:     for(i=1; i<9; i++){
 1305:       char *zSql = sqlite3_mprintf(
 1306:         "CREATE TRIGGER dtr%d BEFORE DELETE ON t%d BEGIN "
 1307:           "DELETE FROM t%d WHERE x = old.x; "
 1308:         "END;", i, i, i+1
 1309:       );
 1310:       execsql(&err, &db, zSql);
 1311:       sqlite3_free(zSql);
 1312:       nCreate++;
 1313:     }
 1314: 
 1315:     for(i=1; i<9; i++){
 1316:       char *zSql = sqlite3_mprintf("DROP TRIGGER itr%d", i);
 1317:       execsql(&err, &db, zSql);
 1318:       sqlite3_free(zSql);
 1319:       nDrop++;
 1320:     }
 1321: 
 1322:     for(i=1; i<9; i++){
 1323:       char *zSql = sqlite3_mprintf("DROP TRIGGER dtr%d", i);
 1324:       execsql(&err, &db, zSql);
 1325:       sqlite3_free(zSql);
 1326:       nDrop++;
 1327:     }
 1328:   }
 1329: 
 1330:   print_and_free_err(&err);
 1331:   return sqlite3_mprintf("%d created, %d dropped", nCreate, nDrop);
 1332: }
 1333: 
 1334: static char *dynamic_triggers_2(int iTid, int iArg){
 1335:   Error err = {0};                /* Error code and message */
 1336:   Sqlite db = {0};                /* SQLite database connection */
 1337:   i64 iVal = 0;
 1338:   int nInsert = 0;
 1339:   int nDelete = 0;
 1340: 
 1341:   opendb(&err, &db, "test.db", 0);
 1342:   while( !timetostop(&err) ){
 1343:     do {
 1344:       iVal = (iVal+1)%100;
 1345:       execsql(&err, &db, "INSERT INTO t1 VALUES(:iX, :iY+1)", &iVal, &iVal);
 1346:       nInsert++;
 1347:     } while( iVal );
 1348: 
 1349:     do {
 1350:       iVal = (iVal+1)%100;
 1351:       execsql(&err, &db, "DELETE FROM t1 WHERE x = :iX", &iVal);
 1352:       nDelete++;
 1353:     } while( iVal );
 1354:   }
 1355: 
 1356:   print_and_free_err(&err);
 1357:   return sqlite3_mprintf("%d inserts, %d deletes", nInsert, nDelete);
 1358: }
 1359: 
 1360: static void dynamic_triggers(int nMs){
 1361:   Error err = {0};
 1362:   Sqlite db = {0};
 1363:   Threadset threads = {0};
 1364: 
 1365:   opendb(&err, &db, "test.db", 1);
 1366:   sql_script(&err, &db, 
 1367:       "PRAGMA page_size = 1024;"
 1368:       "PRAGMA journal_mode = WAL;"
 1369:       "CREATE TABLE t1(x, y);"
 1370:       "CREATE TABLE t2(x, y);"
 1371:       "CREATE TABLE t3(x, y);"
 1372:       "CREATE TABLE t4(x, y);"
 1373:       "CREATE TABLE t5(x, y);"
 1374:       "CREATE TABLE t6(x, y);"
 1375:       "CREATE TABLE t7(x, y);"
 1376:       "CREATE TABLE t8(x, y);"
 1377:       "CREATE TABLE t9(x, y);"
 1378:   );
 1379: 
 1380:   setstoptime(&err, nMs);
 1381: 
 1382:   sqlite3_enable_shared_cache(1);
 1383:   launch_thread(&err, &threads, dynamic_triggers_2, 0);
 1384:   launch_thread(&err, &threads, dynamic_triggers_2, 0);
 1385:   sqlite3_enable_shared_cache(0);
 1386: 
 1387:   sleep(2);
 1388: 
 1389:   launch_thread(&err, &threads, dynamic_triggers_2, 0);
 1390:   launch_thread(&err, &threads, dynamic_triggers_1, 0);
 1391: 
 1392:   join_all_threads(&err, &threads);
 1393: 
 1394:   print_and_free_err(&err);
 1395: }
 1396: 
 1397: #include "tt3_checkpoint.c"
 1398: 
 1399: int main(int argc, char **argv){
 1400:   struct ThreadTest {
 1401:     void (*xTest)(int);
 1402:     const char *zTest;
 1403:     int nMs;
 1404:   } aTest[] = {
 1405:     { walthread1, "walthread1", 20000 },
 1406:     { walthread2, "walthread2", 20000 },
 1407:     { walthread3, "walthread3", 20000 },
 1408:     { walthread4, "walthread4", 20000 },
 1409:     { walthread5, "walthread5",  1000 },
 1410:     { walthread5, "walthread5",  1000 },
 1411:     
 1412:     { cgt_pager_1,      "cgt_pager_1", 0 },
 1413:     { dynamic_triggers, "dynamic_triggers", 20000 },
 1414: 
 1415:     { checkpoint_starvation_1, "checkpoint_starvation_1", 10000 },
 1416:     { checkpoint_starvation_2, "checkpoint_starvation_2", 10000 },
 1417:   };
 1418: 
 1419:   int i;
 1420:   char *zTest = 0;
 1421:   int nTest = 0;
 1422:   int bTestfound = 0;
 1423:   int bPrefix = 0;
 1424: 
 1425:   if( argc>2 ) goto usage;
 1426:   if( argc==2 ){
 1427:     zTest = argv[1];
 1428:     nTest = strlen(zTest);
 1429:     if( zTest[nTest-1]=='*' ){
 1430:       nTest--;
 1431:       bPrefix = 1;
 1432:     }
 1433:   }
 1434: 
 1435:   sqlite3_config(SQLITE_CONFIG_MULTITHREAD);
 1436: 
 1437:   for(i=0; i<sizeof(aTest)/sizeof(aTest[0]); i++){
 1438:     char const *z = aTest[i].zTest;
 1439:     int n = strlen(z);
 1440:     if( !zTest || ((bPrefix || n==nTest) && 0==strncmp(zTest, z, nTest)) ){
 1441:       printf("Running %s for %d seconds...\n", z, aTest[i].nMs/1000);
 1442:       aTest[i].xTest(aTest[i].nMs);
 1443:       bTestfound++;
 1444:     }
 1445:   }
 1446:   if( bTestfound==0 ) goto usage;
 1447: 
 1448:   printf("Total of %d errors across all tests\n", nGlobalErr);
 1449:   return (nGlobalErr>0 ? 255 : 0);
 1450: 
 1451:  usage:
 1452:   printf("Usage: %s [testname|testprefix*]\n", argv[0]);
 1453:   printf("Available tests are:\n");
 1454:   for(i=0; i<sizeof(aTest)/sizeof(aTest[0]); i++){
 1455:     printf("   %s\n", aTest[i].zTest);
 1456:   }
 1457: 
 1458:   return 254;
 1459: }
 1460: 
 1461: 

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