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| 1 /* | |
| 2 ** 2013-10-09 | |
| 3 ** | |
| 4 ** The author disclaims copyright to this source code. In place of | |
| 5 ** a legal notice, here is a blessing: | |
| 6 ** | |
| 7 ** May you do good and not evil. | |
| 8 ** May you find forgiveness for yourself and forgive others. | |
| 9 ** May you share freely, never taking more than you give. | |
| 10 ** | |
| 11 ****************************************************************************** | |
| 12 ** | |
| 13 ** This file contains the implementation of an SQLite vfs wrapper for | |
| 14 ** unix that generates per-database log files of all disk activity. | |
| 15 */ | |
| 16 | |
| 17 /* | |
| 18 ** This module contains code for a wrapper VFS that causes a log of | |
| 19 ** most VFS calls to be written into a file on disk. | |
| 20 ** | |
| 21 ** Each database connection creates a separate log file in the same | |
| 22 ** directory as the original database and named after the original | |
| 23 ** database. A unique suffix is added to avoid name collisions. | |
| 24 ** Separate log files are used so that concurrent processes do not | |
| 25 ** try to write log operations to the same file at the same instant, | |
| 26 ** resulting in overwritten or comingled log text. | |
| 27 ** | |
| 28 ** Each individual log file records operations by a single database | |
| 29 ** connection on both the original database and its associated rollback | |
| 30 ** journal. | |
| 31 ** | |
| 32 ** The log files are in the comma-separated-value (CSV) format. The | |
| 33 ** log files can be imported into an SQLite database using the ".import" | |
| 34 ** command of the SQLite command-line shell for analysis. | |
| 35 ** | |
| 36 ** One technique for using this module is to append the text of this | |
| 37 ** module to the end of a standard "sqlite3.c" amalgamation file then | |
| 38 ** add the following compile-time options: | |
| 39 ** | |
| 40 ** -DSQLITE_EXTRA_INIT=sqlite3_register_vfslog | |
| 41 ** -DSQLITE_USE_FCNTL_TRACE | |
| 42 ** | |
| 43 ** The first compile-time option causes the sqlite3_register_vfslog() | |
| 44 ** function, defined below, to be invoked when SQLite is initialized. | |
| 45 ** That causes this custom VFS to become the default VFS for all | |
| 46 ** subsequent connections. The SQLITE_USE_FCNTL_TRACE option causes | |
| 47 ** the SQLite core to issue extra sqlite3_file_control() operations | |
| 48 ** with SQLITE_FCNTL_TRACE to give some indication of what is going | |
| 49 ** on in the core. | |
| 50 */ | |
| 51 | |
| 52 #include "sqlite3.h" | |
| 53 #include <string.h> | |
| 54 #include <assert.h> | |
| 55 #include <stdio.h> | |
| 56 #if SQLITE_OS_UNIX | |
| 57 # include <unistd.h> | |
| 58 #endif | |
| 59 | |
| 60 /* | |
| 61 ** Forward declaration of objects used by this utility | |
| 62 */ | |
| 63 typedef struct VLogLog VLogLog; | |
| 64 typedef struct VLogVfs VLogVfs; | |
| 65 typedef struct VLogFile VLogFile; | |
| 66 | |
| 67 /* There is a pair (an array of size 2) of the following objects for | |
| 68 ** each database file being logged. The first contains the filename | |
| 69 ** and is used to log I/O with the main database. The second has | |
| 70 ** a NULL filename and is used to log I/O for the journal. Both | |
| 71 ** out pointers are the same. | |
| 72 */ | |
| 73 struct VLogLog { | |
| 74 VLogLog *pNext; /* Next in a list of all active logs */ | |
| 75 VLogLog **ppPrev; /* Pointer to this in the list */ | |
| 76 int nRef; /* Number of references to this object */ | |
| 77 int nFilename; /* Length of zFilename in bytes */ | |
| 78 char *zFilename; /* Name of database file. NULL for journal */ | |
| 79 FILE *out; /* Write information here */ | |
| 80 }; | |
| 81 | |
| 82 struct VLogVfs { | |
| 83 sqlite3_vfs base; /* VFS methods */ | |
| 84 sqlite3_vfs *pVfs; /* Parent VFS */ | |
| 85 }; | |
| 86 | |
| 87 struct VLogFile { | |
| 88 sqlite3_file base; /* IO methods */ | |
| 89 sqlite3_file *pReal; /* Underlying file handle */ | |
| 90 VLogLog *pLog; /* The log file for this file */ | |
| 91 }; | |
| 92 | |
| 93 #define REALVFS(p) (((VLogVfs*)(p))->pVfs) | |
| 94 | |
| 95 /* | |
| 96 ** Methods for VLogFile | |
| 97 */ | |
| 98 static int vlogClose(sqlite3_file*); | |
| 99 static int vlogRead(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst); | |
| 100 static int vlogWrite(sqlite3_file*,const void*,int iAmt, sqlite3_int64 iOfst); | |
| 101 static int vlogTruncate(sqlite3_file*, sqlite3_int64 size); | |
| 102 static int vlogSync(sqlite3_file*, int flags); | |
| 103 static int vlogFileSize(sqlite3_file*, sqlite3_int64 *pSize); | |
| 104 static int vlogLock(sqlite3_file*, int); | |
| 105 static int vlogUnlock(sqlite3_file*, int); | |
| 106 static int vlogCheckReservedLock(sqlite3_file*, int *pResOut); | |
| 107 static int vlogFileControl(sqlite3_file*, int op, void *pArg); | |
| 108 static int vlogSectorSize(sqlite3_file*); | |
| 109 static int vlogDeviceCharacteristics(sqlite3_file*); | |
| 110 | |
| 111 /* | |
| 112 ** Methods for VLogVfs | |
| 113 */ | |
| 114 static int vlogOpen(sqlite3_vfs*, const char *, sqlite3_file*, int , int *); | |
| 115 static int vlogDelete(sqlite3_vfs*, const char *zName, int syncDir); | |
| 116 static int vlogAccess(sqlite3_vfs*, const char *zName, int flags, int *); | |
| 117 static int vlogFullPathname(sqlite3_vfs*, const char *zName, int, char *zOut); | |
| 118 static void *vlogDlOpen(sqlite3_vfs*, const char *zFilename); | |
| 119 static void vlogDlError(sqlite3_vfs*, int nByte, char *zErrMsg); | |
| 120 static void (*vlogDlSym(sqlite3_vfs *pVfs, void *p, const char*zSym))(void); | |
| 121 static void vlogDlClose(sqlite3_vfs*, void*); | |
| 122 static int vlogRandomness(sqlite3_vfs*, int nByte, char *zOut); | |
| 123 static int vlogSleep(sqlite3_vfs*, int microseconds); | |
| 124 static int vlogCurrentTime(sqlite3_vfs*, double*); | |
| 125 static int vlogGetLastError(sqlite3_vfs*, int, char *); | |
| 126 static int vlogCurrentTimeInt64(sqlite3_vfs*, sqlite3_int64*); | |
| 127 | |
| 128 static VLogVfs vlog_vfs = { | |
| 129 { | |
| 130 1, /* iVersion */ | |
| 131 0, /* szOsFile (set by register_vlog()) */ | |
| 132 1024, /* mxPathname */ | |
| 133 0, /* pNext */ | |
| 134 "vfslog", /* zName */ | |
| 135 0, /* pAppData */ | |
| 136 vlogOpen, /* xOpen */ | |
| 137 vlogDelete, /* xDelete */ | |
| 138 vlogAccess, /* xAccess */ | |
| 139 vlogFullPathname, /* xFullPathname */ | |
| 140 vlogDlOpen, /* xDlOpen */ | |
| 141 vlogDlError, /* xDlError */ | |
| 142 vlogDlSym, /* xDlSym */ | |
| 143 vlogDlClose, /* xDlClose */ | |
| 144 vlogRandomness, /* xRandomness */ | |
| 145 vlogSleep, /* xSleep */ | |
| 146 vlogCurrentTime, /* xCurrentTime */ | |
| 147 vlogGetLastError, /* xGetLastError */ | |
| 148 vlogCurrentTimeInt64 /* xCurrentTimeInt64 */ | |
| 149 }, | |
| 150 0 | |
| 151 }; | |
| 152 | |
| 153 static sqlite3_io_methods vlog_io_methods = { | |
| 154 1, /* iVersion */ | |
| 155 vlogClose, /* xClose */ | |
| 156 vlogRead, /* xRead */ | |
| 157 vlogWrite, /* xWrite */ | |
| 158 vlogTruncate, /* xTruncate */ | |
| 159 vlogSync, /* xSync */ | |
| 160 vlogFileSize, /* xFileSize */ | |
| 161 vlogLock, /* xLock */ | |
| 162 vlogUnlock, /* xUnlock */ | |
| 163 vlogCheckReservedLock, /* xCheckReservedLock */ | |
| 164 vlogFileControl, /* xFileControl */ | |
| 165 vlogSectorSize, /* xSectorSize */ | |
| 166 vlogDeviceCharacteristics, /* xDeviceCharacteristics */ | |
| 167 0, /* xShmMap */ | |
| 168 0, /* xShmLock */ | |
| 169 0, /* xShmBarrier */ | |
| 170 0 /* xShmUnmap */ | |
| 171 }; | |
| 172 | |
| 173 #if SQLITE_OS_UNIX && !defined(NO_GETTOD) | |
| 174 #include <sys/time.h> | |
| 175 static sqlite3_uint64 vlog_time(){ | |
| 176 struct timeval sTime; | |
| 177 gettimeofday(&sTime, 0); | |
| 178 return sTime.tv_usec + (sqlite3_uint64)sTime.tv_sec * 1000000; | |
| 179 } | |
| 180 #elif SQLITE_OS_WIN | |
| 181 #include <windows.h> | |
| 182 #include <time.h> | |
| 183 static sqlite3_uint64 vlog_time(){ | |
| 184 FILETIME ft; | |
| 185 sqlite3_uint64 u64time = 0; | |
| 186 | |
| 187 GetSystemTimeAsFileTime(&ft); | |
| 188 | |
| 189 u64time |= ft.dwHighDateTime; | |
| 190 u64time <<= 32; | |
| 191 u64time |= ft.dwLowDateTime; | |
| 192 | |
| 193 /* ft is 100-nanosecond intervals, we want microseconds */ | |
| 194 return u64time /(sqlite3_uint64)10; | |
| 195 } | |
| 196 #else | |
| 197 static sqlite3_uint64 vlog_time(){ | |
| 198 return 0; | |
| 199 } | |
| 200 #endif | |
| 201 | |
| 202 | |
| 203 /* | |
| 204 ** Write a message to the log file | |
| 205 */ | |
| 206 static void vlogLogPrint( | |
| 207 VLogLog *pLog, /* The log file to write into */ | |
| 208 sqlite3_int64 tStart, /* Start time of system call */ | |
| 209 sqlite3_int64 tElapse, /* Elapse time of system call */ | |
| 210 const char *zOp, /* Type of system call */ | |
| 211 sqlite3_int64 iArg1, /* First argument */ | |
| 212 sqlite3_int64 iArg2, /* Second argument */ | |
| 213 const char *zArg3, /* Third argument */ | |
| 214 int iRes /* Result */ | |
| 215 ){ | |
| 216 char z1[40], z2[40], z3[2000]; | |
| 217 if( pLog==0 ) return; | |
| 218 if( iArg1>=0 ){ | |
| 219 sqlite3_snprintf(sizeof(z1), z1, "%lld", iArg1); | |
| 220 }else{ | |
| 221 z1[0] = 0; | |
| 222 } | |
| 223 if( iArg2>=0 ){ | |
| 224 sqlite3_snprintf(sizeof(z2), z2, "%lld", iArg2); | |
| 225 }else{ | |
| 226 z2[0] = 0; | |
| 227 } | |
| 228 if( zArg3 ){ | |
| 229 sqlite3_snprintf(sizeof(z3), z3, "\"%.*w\"", sizeof(z3)-4, zArg3); | |
| 230 }else{ | |
| 231 z3[0] = 0; | |
| 232 } | |
| 233 fprintf(pLog->out,"%lld,%lld,%s,%d,%s,%s,%s,%d\n", | |
| 234 tStart, tElapse, zOp, pLog->zFilename==0, z1, z2, z3, iRes); | |
| 235 } | |
| 236 | |
| 237 /* | |
| 238 ** List of all active log connections. Protected by the master mutex. | |
| 239 */ | |
| 240 static VLogLog *allLogs = 0; | |
| 241 | |
| 242 /* | |
| 243 ** Close a VLogLog object | |
| 244 */ | |
| 245 static void vlogLogClose(VLogLog *p){ | |
| 246 if( p ){ | |
| 247 sqlite3_mutex *pMutex; | |
| 248 p->nRef--; | |
| 249 if( p->nRef>0 || p->zFilename==0 ) return; | |
| 250 pMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER); | |
| 251 sqlite3_mutex_enter(pMutex); | |
| 252 *p->ppPrev = p->pNext; | |
| 253 if( p->pNext ) p->pNext->ppPrev = p->ppPrev; | |
| 254 sqlite3_mutex_leave(pMutex); | |
| 255 fclose(p->out); | |
| 256 sqlite3_free(p); | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 /* | |
| 261 ** Open a VLogLog object on the given file | |
| 262 */ | |
| 263 static VLogLog *vlogLogOpen(const char *zFilename){ | |
| 264 int nName = (int)strlen(zFilename); | |
| 265 int isJournal = 0; | |
| 266 sqlite3_mutex *pMutex; | |
| 267 VLogLog *pLog, *pTemp; | |
| 268 sqlite3_int64 tNow = 0; | |
| 269 if( nName>4 && strcmp(zFilename+nName-4,"-wal")==0 ){ | |
| 270 return 0; /* Do not log wal files */ | |
| 271 }else | |
| 272 if( nName>8 && strcmp(zFilename+nName-8,"-journal")==0 ){ | |
| 273 nName -= 8; | |
| 274 isJournal = 1; | |
| 275 }else if( nName>12 | |
| 276 && sqlite3_strglob("-mj??????9??", zFilename+nName-12)==0 ){ | |
| 277 return 0; /* Do not log master journal files */ | |
| 278 } | |
| 279 pTemp = sqlite3_malloc( sizeof(*pLog)*2 + nName + 60 ); | |
| 280 if( pTemp==0 ) return 0; | |
| 281 pMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER); | |
| 282 sqlite3_mutex_enter(pMutex); | |
| 283 for(pLog=allLogs; pLog; pLog=pLog->pNext){ | |
| 284 if( pLog->nFilename==nName && !memcmp(pLog->zFilename, zFilename, nName) ){ | |
| 285 break; | |
| 286 } | |
| 287 } | |
| 288 if( pLog==0 ){ | |
| 289 pLog = pTemp; | |
| 290 pTemp = 0; | |
| 291 memset(pLog, 0, sizeof(*pLog)*2); | |
| 292 pLog->zFilename = (char*)&pLog[2]; | |
| 293 tNow = vlog_time(); | |
| 294 sqlite3_snprintf(nName+60, pLog->zFilename, "%.*s-debuglog-%lld", | |
| 295 nName, zFilename, tNow); | |
| 296 pLog->out = fopen(pLog->zFilename, "a"); | |
| 297 if( pLog->out==0 ){ | |
| 298 sqlite3_mutex_leave(pMutex); | |
| 299 sqlite3_free(pLog); | |
| 300 return 0; | |
| 301 } | |
| 302 pLog->nFilename = nName; | |
| 303 pLog[1].out = pLog[0].out; | |
| 304 pLog->ppPrev = &allLogs; | |
| 305 if( allLogs ) allLogs->ppPrev = &pLog->pNext; | |
| 306 pLog->pNext = allLogs; | |
| 307 allLogs = pLog; | |
| 308 } | |
| 309 sqlite3_mutex_leave(pMutex); | |
| 310 if( pTemp ){ | |
| 311 sqlite3_free(pTemp); | |
| 312 }else{ | |
| 313 #if SQLITE_OS_UNIX | |
| 314 char zHost[200]; | |
| 315 zHost[0] = 0; | |
| 316 gethostname(zHost, sizeof(zHost)-1); | |
| 317 zHost[sizeof(zHost)-1] = 0; | |
| 318 vlogLogPrint(pLog, tNow, 0, "IDENT", getpid(), -1, zHost, 0); | |
| 319 #endif | |
| 320 } | |
| 321 if( pLog && isJournal ) pLog++; | |
| 322 pLog->nRef++; | |
| 323 return pLog; | |
| 324 } | |
| 325 | |
| 326 | |
| 327 /* | |
| 328 ** Close an vlog-file. | |
| 329 */ | |
| 330 static int vlogClose(sqlite3_file *pFile){ | |
| 331 sqlite3_uint64 tStart, tElapse; | |
| 332 int rc = SQLITE_OK; | |
| 333 VLogFile *p = (VLogFile *)pFile; | |
| 334 | |
| 335 tStart = vlog_time(); | |
| 336 if( p->pReal->pMethods ){ | |
| 337 rc = p->pReal->pMethods->xClose(p->pReal); | |
| 338 } | |
| 339 tElapse = vlog_time() - tStart; | |
| 340 vlogLogPrint(p->pLog, tStart, tElapse, "CLOSE", -1, -1, 0, rc); | |
| 341 vlogLogClose(p->pLog); | |
| 342 return rc; | |
| 343 } | |
| 344 | |
| 345 /* | |
| 346 ** Compute signature for a block of content. | |
| 347 ** | |
| 348 ** For blocks of 16 or fewer bytes, the signature is just a hex dump of | |
| 349 ** the entire block. | |
| 350 ** | |
| 351 ** For blocks of more than 16 bytes, the signature is a hex dump of the | |
| 352 ** first 8 bytes followed by a 64-bit has of the entire block. | |
| 353 */ | |
| 354 static void vlogSignature(unsigned char *p, int n, char *zCksum){ | |
| 355 unsigned int s0 = 0, s1 = 0; | |
| 356 unsigned int *pI; | |
| 357 int i; | |
| 358 if( n<=16 ){ | |
| 359 for(i=0; i<n; i++) sqlite3_snprintf(3, zCksum+i*2, "%02x", p[i]); | |
| 360 }else{ | |
| 361 pI = (unsigned int*)p; | |
| 362 for(i=0; i<n-7; i+=8){ | |
| 363 s0 += pI[0] + s1; | |
| 364 s1 += pI[1] + s0; | |
| 365 pI += 2; | |
| 366 } | |
| 367 for(i=0; i<8; i++) sqlite3_snprintf(3, zCksum+i*2, "%02x", p[i]); | |
| 368 sqlite3_snprintf(18, zCksum+i*2, "-%08x%08x", s0, s1); | |
| 369 } | |
| 370 } | |
| 371 | |
| 372 /* | |
| 373 ** Convert a big-endian 32-bit integer into a native integer | |
| 374 */ | |
| 375 static int bigToNative(const unsigned char *x){ | |
| 376 return (x[0]<<24) + (x[1]<<16) + (x[2]<<8) + x[3]; | |
| 377 } | |
| 378 | |
| 379 /* | |
| 380 ** Read data from an vlog-file. | |
| 381 */ | |
| 382 static int vlogRead( | |
| 383 sqlite3_file *pFile, | |
| 384 void *zBuf, | |
| 385 int iAmt, | |
| 386 sqlite_int64 iOfst | |
| 387 ){ | |
| 388 int rc; | |
| 389 sqlite3_uint64 tStart, tElapse; | |
| 390 VLogFile *p = (VLogFile *)pFile; | |
| 391 char zSig[40]; | |
| 392 | |
| 393 tStart = vlog_time(); | |
| 394 rc = p->pReal->pMethods->xRead(p->pReal, zBuf, iAmt, iOfst); | |
| 395 tElapse = vlog_time() - tStart; | |
| 396 if( rc==SQLITE_OK ){ | |
| 397 vlogSignature(zBuf, iAmt, zSig); | |
| 398 }else{ | |
| 399 zSig[0] = 0; | |
| 400 } | |
| 401 vlogLogPrint(p->pLog, tStart, tElapse, "READ", iAmt, iOfst, zSig, rc); | |
| 402 if( rc==SQLITE_OK | |
| 403 && p->pLog | |
| 404 && p->pLog->zFilename | |
| 405 && iOfst<=24 | |
| 406 && iOfst+iAmt>=28 | |
| 407 ){ | |
| 408 unsigned char *x = ((unsigned char*)zBuf)+(24-iOfst); | |
| 409 unsigned iCtr, nFree = -1; | |
| 410 char *zFree = 0; | |
| 411 char zStr[12]; | |
| 412 iCtr = bigToNative(x); | |
| 413 if( iOfst+iAmt>=40 ){ | |
| 414 zFree = zStr; | |
| 415 sqlite3_snprintf(sizeof(zStr), zStr, "%d", bigToNative(x+8)); | |
| 416 nFree = bigToNative(x+12); | |
| 417 } | |
| 418 vlogLogPrint(p->pLog, tStart, 0, "CHNGCTR-READ", iCtr, nFree, zFree, 0); | |
| 419 } | |
| 420 return rc; | |
| 421 } | |
| 422 | |
| 423 /* | |
| 424 ** Write data to an vlog-file. | |
| 425 */ | |
| 426 static int vlogWrite( | |
| 427 sqlite3_file *pFile, | |
| 428 const void *z, | |
| 429 int iAmt, | |
| 430 sqlite_int64 iOfst | |
| 431 ){ | |
| 432 int rc; | |
| 433 sqlite3_uint64 tStart, tElapse; | |
| 434 VLogFile *p = (VLogFile *)pFile; | |
| 435 char zSig[40]; | |
| 436 | |
| 437 tStart = vlog_time(); | |
| 438 vlogSignature((unsigned char*)z, iAmt, zSig); | |
| 439 rc = p->pReal->pMethods->xWrite(p->pReal, z, iAmt, iOfst); | |
| 440 tElapse = vlog_time() - tStart; | |
| 441 vlogLogPrint(p->pLog, tStart, tElapse, "WRITE", iAmt, iOfst, zSig, rc); | |
| 442 if( rc==SQLITE_OK | |
| 443 && p->pLog | |
| 444 && p->pLog->zFilename | |
| 445 && iOfst<=24 | |
| 446 && iOfst+iAmt>=28 | |
| 447 ){ | |
| 448 unsigned char *x = ((unsigned char*)z)+(24-iOfst); | |
| 449 unsigned iCtr, nFree = -1; | |
| 450 char *zFree = 0; | |
| 451 char zStr[12]; | |
| 452 iCtr = bigToNative(x); | |
| 453 if( iOfst+iAmt>=40 ){ | |
| 454 zFree = zStr; | |
| 455 sqlite3_snprintf(sizeof(zStr), zStr, "%d", bigToNative(x+8)); | |
| 456 nFree = bigToNative(x+12); | |
| 457 } | |
| 458 vlogLogPrint(p->pLog, tStart, 0, "CHNGCTR-WRITE", iCtr, nFree, zFree, 0); | |
| 459 } | |
| 460 return rc; | |
| 461 } | |
| 462 | |
| 463 /* | |
| 464 ** Truncate an vlog-file. | |
| 465 */ | |
| 466 static int vlogTruncate(sqlite3_file *pFile, sqlite_int64 size){ | |
| 467 int rc; | |
| 468 sqlite3_uint64 tStart, tElapse; | |
| 469 VLogFile *p = (VLogFile *)pFile; | |
| 470 tStart = vlog_time(); | |
| 471 rc = p->pReal->pMethods->xTruncate(p->pReal, size); | |
| 472 tElapse = vlog_time() - tStart; | |
| 473 vlogLogPrint(p->pLog, tStart, tElapse, "TRUNCATE", size, -1, 0, rc); | |
| 474 return rc; | |
| 475 } | |
| 476 | |
| 477 /* | |
| 478 ** Sync an vlog-file. | |
| 479 */ | |
| 480 static int vlogSync(sqlite3_file *pFile, int flags){ | |
| 481 int rc; | |
| 482 sqlite3_uint64 tStart, tElapse; | |
| 483 VLogFile *p = (VLogFile *)pFile; | |
| 484 tStart = vlog_time(); | |
| 485 rc = p->pReal->pMethods->xSync(p->pReal, flags); | |
| 486 tElapse = vlog_time() - tStart; | |
| 487 vlogLogPrint(p->pLog, tStart, tElapse, "SYNC", flags, -1, 0, rc); | |
| 488 return rc; | |
| 489 } | |
| 490 | |
| 491 /* | |
| 492 ** Return the current file-size of an vlog-file. | |
| 493 */ | |
| 494 static int vlogFileSize(sqlite3_file *pFile, sqlite_int64 *pSize){ | |
| 495 int rc; | |
| 496 sqlite3_uint64 tStart, tElapse; | |
| 497 VLogFile *p = (VLogFile *)pFile; | |
| 498 tStart = vlog_time(); | |
| 499 rc = p->pReal->pMethods->xFileSize(p->pReal, pSize); | |
| 500 tElapse = vlog_time() - tStart; | |
| 501 vlogLogPrint(p->pLog, tStart, tElapse, "FILESIZE", *pSize, -1, 0, rc); | |
| 502 return rc; | |
| 503 } | |
| 504 | |
| 505 /* | |
| 506 ** Lock an vlog-file. | |
| 507 */ | |
| 508 static int vlogLock(sqlite3_file *pFile, int eLock){ | |
| 509 int rc; | |
| 510 sqlite3_uint64 tStart, tElapse; | |
| 511 VLogFile *p = (VLogFile *)pFile; | |
| 512 tStart = vlog_time(); | |
| 513 rc = p->pReal->pMethods->xLock(p->pReal, eLock); | |
| 514 tElapse = vlog_time() - tStart; | |
| 515 vlogLogPrint(p->pLog, tStart, tElapse, "LOCK", eLock, -1, 0, rc); | |
| 516 return rc; | |
| 517 } | |
| 518 | |
| 519 /* | |
| 520 ** Unlock an vlog-file. | |
| 521 */ | |
| 522 static int vlogUnlock(sqlite3_file *pFile, int eLock){ | |
| 523 int rc; | |
| 524 sqlite3_uint64 tStart; | |
| 525 VLogFile *p = (VLogFile *)pFile; | |
| 526 tStart = vlog_time(); | |
| 527 vlogLogPrint(p->pLog, tStart, 0, "UNLOCK", eLock, -1, 0, 0); | |
| 528 rc = p->pReal->pMethods->xUnlock(p->pReal, eLock); | |
| 529 return rc; | |
| 530 } | |
| 531 | |
| 532 /* | |
| 533 ** Check if another file-handle holds a RESERVED lock on an vlog-file. | |
| 534 */ | |
| 535 static int vlogCheckReservedLock(sqlite3_file *pFile, int *pResOut){ | |
| 536 int rc; | |
| 537 sqlite3_uint64 tStart, tElapse; | |
| 538 VLogFile *p = (VLogFile *)pFile; | |
| 539 tStart = vlog_time(); | |
| 540 rc = p->pReal->pMethods->xCheckReservedLock(p->pReal, pResOut); | |
| 541 tElapse = vlog_time() - tStart; | |
| 542 vlogLogPrint(p->pLog, tStart, tElapse, "CHECKRESERVEDLOCK", | |
| 543 *pResOut, -1, "", rc); | |
| 544 return rc; | |
| 545 } | |
| 546 | |
| 547 /* | |
| 548 ** File control method. For custom operations on an vlog-file. | |
| 549 */ | |
| 550 static int vlogFileControl(sqlite3_file *pFile, int op, void *pArg){ | |
| 551 VLogFile *p = (VLogFile *)pFile; | |
| 552 sqlite3_uint64 tStart, tElapse; | |
| 553 int rc; | |
| 554 tStart = vlog_time(); | |
| 555 rc = p->pReal->pMethods->xFileControl(p->pReal, op, pArg); | |
| 556 if( op==SQLITE_FCNTL_VFSNAME && rc==SQLITE_OK ){ | |
| 557 *(char**)pArg = sqlite3_mprintf("vlog/%z", *(char**)pArg); | |
| 558 } | |
| 559 tElapse = vlog_time() - tStart; | |
| 560 if( op==SQLITE_FCNTL_TRACE ){ | |
| 561 vlogLogPrint(p->pLog, tStart, tElapse, "TRACE", op, -1, pArg, rc); | |
| 562 }else if( op==SQLITE_FCNTL_PRAGMA ){ | |
| 563 const char **azArg = (const char **)pArg; | |
| 564 vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, -1, azArg[1], rc); | |
| 565 }else if( op==SQLITE_FCNTL_SIZE_HINT ){ | |
| 566 sqlite3_int64 sz = *(sqlite3_int64*)pArg; | |
| 567 vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, sz, 0, rc); | |
| 568 }else{ | |
| 569 vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, -1, 0, rc); | |
| 570 } | |
| 571 return rc; | |
| 572 } | |
| 573 | |
| 574 /* | |
| 575 ** Return the sector-size in bytes for an vlog-file. | |
| 576 */ | |
| 577 static int vlogSectorSize(sqlite3_file *pFile){ | |
| 578 int rc; | |
| 579 sqlite3_uint64 tStart, tElapse; | |
| 580 VLogFile *p = (VLogFile *)pFile; | |
| 581 tStart = vlog_time(); | |
| 582 rc = p->pReal->pMethods->xSectorSize(p->pReal); | |
| 583 tElapse = vlog_time() - tStart; | |
| 584 vlogLogPrint(p->pLog, tStart, tElapse, "SECTORSIZE", -1, -1, 0, rc); | |
| 585 return rc; | |
| 586 } | |
| 587 | |
| 588 /* | |
| 589 ** Return the device characteristic flags supported by an vlog-file. | |
| 590 */ | |
| 591 static int vlogDeviceCharacteristics(sqlite3_file *pFile){ | |
| 592 int rc; | |
| 593 sqlite3_uint64 tStart, tElapse; | |
| 594 VLogFile *p = (VLogFile *)pFile; | |
| 595 tStart = vlog_time(); | |
| 596 rc = p->pReal->pMethods->xDeviceCharacteristics(p->pReal); | |
| 597 tElapse = vlog_time() - tStart; | |
| 598 vlogLogPrint(p->pLog, tStart, tElapse, "DEVCHAR", -1, -1, 0, rc); | |
| 599 return rc; | |
| 600 } | |
| 601 | |
| 602 | |
| 603 /* | |
| 604 ** Open an vlog file handle. | |
| 605 */ | |
| 606 static int vlogOpen( | |
| 607 sqlite3_vfs *pVfs, | |
| 608 const char *zName, | |
| 609 sqlite3_file *pFile, | |
| 610 int flags, | |
| 611 int *pOutFlags | |
| 612 ){ | |
| 613 int rc; | |
| 614 sqlite3_uint64 tStart, tElapse; | |
| 615 sqlite3_int64 iArg2; | |
| 616 VLogFile *p = (VLogFile*)pFile; | |
| 617 | |
| 618 p->pReal = (sqlite3_file*)&p[1]; | |
| 619 if( (flags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_MAIN_JOURNAL))!=0 ){ | |
| 620 p->pLog = vlogLogOpen(zName); | |
| 621 }else{ | |
| 622 p->pLog = 0; | |
| 623 } | |
| 624 tStart = vlog_time(); | |
| 625 rc = REALVFS(pVfs)->xOpen(REALVFS(pVfs), zName, p->pReal, flags, pOutFlags); | |
| 626 tElapse = vlog_time() - tStart; | |
| 627 iArg2 = pOutFlags ? *pOutFlags : -1; | |
| 628 vlogLogPrint(p->pLog, tStart, tElapse, "OPEN", flags, iArg2, 0, rc); | |
| 629 if( rc==SQLITE_OK ){ | |
| 630 pFile->pMethods = &vlog_io_methods; | |
| 631 }else{ | |
| 632 if( p->pLog ) vlogLogClose(p->pLog); | |
| 633 p->pLog = 0; | |
| 634 } | |
| 635 return rc; | |
| 636 } | |
| 637 | |
| 638 /* | |
| 639 ** Delete the file located at zPath. If the dirSync argument is true, | |
| 640 ** ensure the file-system modifications are synced to disk before | |
| 641 ** returning. | |
| 642 */ | |
| 643 static int vlogDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){ | |
| 644 int rc; | |
| 645 sqlite3_uint64 tStart, tElapse; | |
| 646 VLogLog *pLog; | |
| 647 tStart = vlog_time(); | |
| 648 rc = REALVFS(pVfs)->xDelete(REALVFS(pVfs), zPath, dirSync); | |
| 649 tElapse = vlog_time() - tStart; | |
| 650 pLog = vlogLogOpen(zPath); | |
| 651 vlogLogPrint(pLog, tStart, tElapse, "DELETE", dirSync, -1, 0, rc); | |
| 652 vlogLogClose(pLog); | |
| 653 return rc; | |
| 654 } | |
| 655 | |
| 656 /* | |
| 657 ** Test for access permissions. Return true if the requested permission | |
| 658 ** is available, or false otherwise. | |
| 659 */ | |
| 660 static int vlogAccess( | |
| 661 sqlite3_vfs *pVfs, | |
| 662 const char *zPath, | |
| 663 int flags, | |
| 664 int *pResOut | |
| 665 ){ | |
| 666 int rc; | |
| 667 sqlite3_uint64 tStart, tElapse; | |
| 668 VLogLog *pLog; | |
| 669 tStart = vlog_time(); | |
| 670 rc = REALVFS(pVfs)->xAccess(REALVFS(pVfs), zPath, flags, pResOut); | |
| 671 tElapse = vlog_time() - tStart; | |
| 672 pLog = vlogLogOpen(zPath); | |
| 673 vlogLogPrint(pLog, tStart, tElapse, "ACCESS", flags, *pResOut, 0, rc); | |
| 674 vlogLogClose(pLog); | |
| 675 return rc; | |
| 676 } | |
| 677 | |
| 678 /* | |
| 679 ** Populate buffer zOut with the full canonical pathname corresponding | |
| 680 ** to the pathname in zPath. zOut is guaranteed to point to a buffer | |
| 681 ** of at least (INST_MAX_PATHNAME+1) bytes. | |
| 682 */ | |
| 683 static int vlogFullPathname( | |
| 684 sqlite3_vfs *pVfs, | |
| 685 const char *zPath, | |
| 686 int nOut, | |
| 687 char *zOut | |
| 688 ){ | |
| 689 return REALVFS(pVfs)->xFullPathname(REALVFS(pVfs), zPath, nOut, zOut); | |
| 690 } | |
| 691 | |
| 692 /* | |
| 693 ** Open the dynamic library located at zPath and return a handle. | |
| 694 */ | |
| 695 static void *vlogDlOpen(sqlite3_vfs *pVfs, const char *zPath){ | |
| 696 return REALVFS(pVfs)->xDlOpen(REALVFS(pVfs), zPath); | |
| 697 } | |
| 698 | |
| 699 /* | |
| 700 ** Populate the buffer zErrMsg (size nByte bytes) with a human readable | |
| 701 ** utf-8 string describing the most recent error encountered associated | |
| 702 ** with dynamic libraries. | |
| 703 */ | |
| 704 static void vlogDlError(sqlite3_vfs *pVfs, int nByte, char *zErrMsg){ | |
| 705 REALVFS(pVfs)->xDlError(REALVFS(pVfs), nByte, zErrMsg); | |
| 706 } | |
| 707 | |
| 708 /* | |
| 709 ** Return a pointer to the symbol zSymbol in the dynamic library pHandle. | |
| 710 */ | |
| 711 static void (*vlogDlSym(sqlite3_vfs *pVfs, void *p, const char *zSym))(void){ | |
| 712 return REALVFS(pVfs)->xDlSym(REALVFS(pVfs), p, zSym); | |
| 713 } | |
| 714 | |
| 715 /* | |
| 716 ** Close the dynamic library handle pHandle. | |
| 717 */ | |
| 718 static void vlogDlClose(sqlite3_vfs *pVfs, void *pHandle){ | |
| 719 REALVFS(pVfs)->xDlClose(REALVFS(pVfs), pHandle); | |
| 720 } | |
| 721 | |
| 722 /* | |
| 723 ** Populate the buffer pointed to by zBufOut with nByte bytes of | |
| 724 ** random data. | |
| 725 */ | |
| 726 static int vlogRandomness(sqlite3_vfs *pVfs, int nByte, char *zBufOut){ | |
| 727 return REALVFS(pVfs)->xRandomness(REALVFS(pVfs), nByte, zBufOut); | |
| 728 } | |
| 729 | |
| 730 /* | |
| 731 ** Sleep for nMicro microseconds. Return the number of microseconds | |
| 732 ** actually slept. | |
| 733 */ | |
| 734 static int vlogSleep(sqlite3_vfs *pVfs, int nMicro){ | |
| 735 return REALVFS(pVfs)->xSleep(REALVFS(pVfs), nMicro); | |
| 736 } | |
| 737 | |
| 738 /* | |
| 739 ** Return the current time as a Julian Day number in *pTimeOut. | |
| 740 */ | |
| 741 static int vlogCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){ | |
| 742 return REALVFS(pVfs)->xCurrentTime(REALVFS(pVfs), pTimeOut); | |
| 743 } | |
| 744 | |
| 745 static int vlogGetLastError(sqlite3_vfs *pVfs, int a, char *b){ | |
| 746 return REALVFS(pVfs)->xGetLastError(REALVFS(pVfs), a, b); | |
| 747 } | |
| 748 static int vlogCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *p){ | |
| 749 return REALVFS(pVfs)->xCurrentTimeInt64(REALVFS(pVfs), p); | |
| 750 } | |
| 751 | |
| 752 /* | |
| 753 ** Register debugvfs as the default VFS for this process. | |
| 754 */ | |
| 755 int sqlite3_register_vfslog(const char *zArg){ | |
| 756 vlog_vfs.pVfs = sqlite3_vfs_find(0); | |
| 757 vlog_vfs.base.szOsFile = sizeof(VLogFile) + vlog_vfs.pVfs->szOsFile; | |
| 758 return sqlite3_vfs_register(&vlog_vfs.base, 1); | |
| 759 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2363173002:
[sqlite] Remove obsolete reference version 3.8.7.4. (Closed)
