Annotation of embedaddon/sqlite3/test/threadtest3.c, revision 1.1

1.1     ! misho       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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