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Overview
Comment: | Add the VFS-trace shim. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
f49a9ef3387bd4453f5654ebe83fea44 |
User & Date: | drh 2011-03-16 16:56:29.108 |
Context
2011-03-16
| ||
17:05 | Add the -vfstrace option to the usage error message in the shell. (check-in: baca45c549 user: drh tags: trunk) | |
16:56 | Add the VFS-trace shim. (check-in: f49a9ef338 user: drh tags: trunk) | |
2011-03-15
| ||
19:08 | Make the "unix-excl" VFS work exactly like "unix" if the database file is read-only. (check-in: d984683499 user: drh tags: trunk) | |
Changes
Changes to src/shell.c.
︙ | ︙ | |||
2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 | int main(int argc, char **argv){ char *zErrMsg = 0; struct callback_data data; const char *zInitFile = 0; char *zFirstCmd = 0; int i; int rc = 0; Argv0 = argv[0]; main_init(&data); stdin_is_interactive = isatty(0); /* Make sure we have a valid signal handler early, before anything ** else is done. | > | 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 | int main(int argc, char **argv){ char *zErrMsg = 0; struct callback_data data; const char *zInitFile = 0; char *zFirstCmd = 0; int i; int rc = 0; Argv0 = argv[0]; main_init(&data); stdin_is_interactive = isatty(0); /* Make sure we have a valid signal handler early, before anything ** else is done. |
︙ | ︙ | |||
2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 | if( c=='K' ){ szHeap *= 1000; break; } if( c=='G' ){ szHeap *= 1000000000; break; } } if( szHeap>0x7fff0000 ) szHeap = 0x7fff0000; #if defined(SQLITE_ENABLE_MEMSYS3) || defined(SQLITE_ENABLE_MEMSYS5) sqlite3_config(SQLITE_CONFIG_HEAP, malloc((int)szHeap), (int)szHeap, 64); #endif }else if( strcmp(argv[i],"-vfs")==0 ){ sqlite3_vfs *pVfs = sqlite3_vfs_find(argv[++i]); if( pVfs ){ sqlite3_vfs_register(pVfs, 1); }else{ fprintf(stderr, "no such VFS: \"%s\"\n", argv[i]); exit(1); | > > > > > > > > > > > | 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 | if( c=='K' ){ szHeap *= 1000; break; } if( c=='G' ){ szHeap *= 1000000000; break; } } if( szHeap>0x7fff0000 ) szHeap = 0x7fff0000; #if defined(SQLITE_ENABLE_MEMSYS3) || defined(SQLITE_ENABLE_MEMSYS5) sqlite3_config(SQLITE_CONFIG_HEAP, malloc((int)szHeap), (int)szHeap, 64); #endif #ifdef SQLITE_ENABLE_VFSTRACE }else if( strcmp(argv[i],"-vfstrace")==0 ){ extern int vfstrace_register( const char *zTraceName, const char *zOldVfsName, int (*xOut)(const char*,void*), void *pOutArg, int makeDefault ); vfstrace_register("trace",0,(int(*)(const char*,void*))fputs, stderr, 1); #endif }else if( strcmp(argv[i],"-vfs")==0 ){ sqlite3_vfs *pVfs = sqlite3_vfs_find(argv[++i]); if( pVfs ){ sqlite3_vfs_register(pVfs, 1); }else{ fprintf(stderr, "no such VFS: \"%s\"\n", argv[i]); exit(1); |
︙ | ︙ | |||
2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 | }else if( strcmp(z,"-interactive")==0 ){ stdin_is_interactive = 1; }else if( strcmp(z,"-batch")==0 ){ stdin_is_interactive = 0; }else if( strcmp(z,"-heap")==0 ){ i++; }else if( strcmp(z,"-vfs")==0 ){ i++; }else if( strcmp(z,"-help")==0 || strcmp(z, "--help")==0 ){ usage(1); }else{ fprintf(stderr,"%s: Error: unknown option: %s\n", Argv0, z); fprintf(stderr,"Use -help for a list of options.\n"); return 1; | > > | 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 | }else if( strcmp(z,"-interactive")==0 ){ stdin_is_interactive = 1; }else if( strcmp(z,"-batch")==0 ){ stdin_is_interactive = 0; }else if( strcmp(z,"-heap")==0 ){ i++; }else if( strcmp(z,"-vfs")==0 ){ i++; }else if( strcmp(z,"-vfstrace")==0 ){ i++; }else if( strcmp(z,"-help")==0 || strcmp(z, "--help")==0 ){ usage(1); }else{ fprintf(stderr,"%s: Error: unknown option: %s\n", Argv0, z); fprintf(stderr,"Use -help for a list of options.\n"); return 1; |
︙ | ︙ |
Added src/test_vfstrace.c.
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In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ****************************************************************************** ** ** This file contains code implements a VFS shim that writes diagnostic ** output for each VFS call, similar to "strace". */ #include <stdlib.h> #include <string.h> #include "sqlite3.h" /* ** An instance of this structure is attached to the each trace VFS to ** provide auxiliary information. */ typedef struct vfstrace_info vfstrace_info; struct vfstrace_info { sqlite3_vfs *pRootVfs; /* The underlying real VFS */ int (*xOut)(const char*, void*); /* Send output here */ void *pOutArg; /* First argument to xOut */ const char *zVfsName; /* Name of this trace-VFS */ sqlite3_vfs *pTraceVfs; /* Pointer back to the trace VFS */ }; /* ** The sqlite3_file object for the trace VFS */ typedef struct vfstrace_file vfstrace_file; struct vfstrace_file { sqlite3_file base; /* Base class. Must be first */ vfstrace_info *pInfo; /* The trace-VFS to which this file belongs */ const char *zFName; /* Base name of the file */ sqlite3_file *pReal; /* The real underlying file */ }; /* ** Method declarations for vfstrace_file. */ static int vfstraceClose(sqlite3_file*); static int vfstraceRead(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst); static int vfstraceWrite(sqlite3_file*,const void*,int iAmt, sqlite3_int64); static int vfstraceTruncate(sqlite3_file*, sqlite3_int64 size); static int vfstraceSync(sqlite3_file*, int flags); static int vfstraceFileSize(sqlite3_file*, sqlite3_int64 *pSize); static int vfstraceLock(sqlite3_file*, int); static int vfstraceUnlock(sqlite3_file*, int); static int vfstraceCheckReservedLock(sqlite3_file*, int *); static int vfstraceFileControl(sqlite3_file*, int op, void *pArg); static int vfstraceSectorSize(sqlite3_file*); static int vfstraceDeviceCharacteristics(sqlite3_file*); static int vfstraceShmLock(sqlite3_file*,int,int,int); static int vfstraceShmMap(sqlite3_file*,int,int,int, void volatile **); static void vfstraceShmBarrier(sqlite3_file*); static int vfstraceShmUnmap(sqlite3_file*,int); /* ** Method declarations for vfstrace_vfs. */ static int vfstraceOpen(sqlite3_vfs*, const char *, sqlite3_file*, int , int *); static int vfstraceDelete(sqlite3_vfs*, const char *zName, int syncDir); static int vfstraceAccess(sqlite3_vfs*, const char *zName, int flags, int *); static int vfstraceFullPathname(sqlite3_vfs*, const char *zName, int, char *); static void *vfstraceDlOpen(sqlite3_vfs*, const char *zFilename); static void vfstraceDlError(sqlite3_vfs*, int nByte, char *zErrMsg); static void (*vfstraceDlSym(sqlite3_vfs*,void*, const char *zSymbol))(void); static void vfstraceDlClose(sqlite3_vfs*, void*); static int vfstraceRandomness(sqlite3_vfs*, int nByte, char *zOut); static int vfstraceSleep(sqlite3_vfs*, int microseconds); static int vfstraceCurrentTime(sqlite3_vfs*, double*); static int vfstraceGetLastError(sqlite3_vfs*, int, char*); static int vfstraceCurrentTimeInt64(sqlite3_vfs*, sqlite3_int64*); static int vfstraceSetSystemCall(sqlite3_vfs*, const char *zName, void *pFunc); static void *vfstraceGetSystemCall(sqlite3_vfs*, const char *zName); static const char *vfstraceNextSystemCall(sqlite3_vfs*, const char *zName); /* ** Return a pointer to the tail of the pathname. Examples: ** ** /home/drh/xyzzy.txt -> xyzzy.txt ** xyzzy.txt -> xyzzy.txt */ static const char *fileTail(const char *z){ int i; if( z==0 ) return 0; i = strlen(z)-1; while( i>0 && z[i-1]!='/' ){ i--; } return &z[i]; } /* ** Send trace output defined by zFormat and subsequent arguments. */ static void vfstrace_printf( vfstrace_info *pInfo, const char *zFormat, ... ){ va_list ap; char *zMsg; va_start(ap, zFormat); zMsg = sqlite3_vmprintf(zFormat, ap); va_end(ap); pInfo->xOut(zMsg, pInfo->pOutArg); sqlite3_free(zMsg); } /* ** Convert value rc into a string and print it using zFormat. zFormat ** should have exactly one %s */ static void vfstrace_print_errcode( vfstrace_info *pInfo, const char *zFormat, int rc ){ char zBuf[50]; char *zVal; switch( rc ){ case SQLITE_OK: zVal = "SQLITE_OK"; break; case SQLITE_ERROR: zVal = "SQLITE_ERROR"; break; case SQLITE_PERM: zVal = "SQLITE_PERM"; break; case SQLITE_ABORT: zVal = "SQLITE_ABORT"; break; case SQLITE_BUSY: zVal = "SQLITE_BUSY"; break; case SQLITE_NOMEM: zVal = "SQLITE_NOMEM"; break; case SQLITE_READONLY: zVal = "SQLITE_READONLY"; break; case SQLITE_INTERRUPT: zVal = "SQLITE_INTERRUPT"; break; case SQLITE_IOERR: zVal = "SQLITE_IOERR"; break; case SQLITE_CORRUPT: zVal = "SQLITE_CORRUPT"; break; case SQLITE_FULL: zVal = "SQLITE_FULL"; break; case SQLITE_CANTOPEN: zVal = "SQLITE_CANTOPEN"; break; case SQLITE_PROTOCOL: zVal = "SQLITE_PROTOCOL"; break; case SQLITE_EMPTY: zVal = "SQLITE_EMPTY"; break; case SQLITE_SCHEMA: zVal = "SQLITE_SCHEMA"; break; case SQLITE_CONSTRAINT: zVal = "SQLITE_CONSTRAINT"; break; case SQLITE_MISMATCH: zVal = "SQLITE_MISMATCH"; break; case SQLITE_MISUSE: zVal = "SQLITE_MISUSE"; break; case SQLITE_NOLFS: zVal = "SQLITE_NOLFS"; break; case SQLITE_IOERR_READ: zVal = "SQLITE_IOERR_READ"; break; case SQLITE_IOERR_SHORT_READ: zVal = "SQLITE_IOERR_SHORT_READ"; break; case SQLITE_IOERR_WRITE: zVal = "SQLITE_IOERR_WRITE"; break; case SQLITE_IOERR_FSYNC: zVal = "SQLITE_IOERR_FSYNC"; break; case SQLITE_IOERR_DIR_FSYNC: zVal = "SQLITE_IOERR_DIR_FSYNC"; break; case SQLITE_IOERR_TRUNCATE: zVal = "SQLITE_IOERR_TRUNCATE"; break; case SQLITE_IOERR_FSTAT: zVal = "SQLITE_IOERR_FSTAT"; break; case SQLITE_IOERR_UNLOCK: zVal = "SQLITE_IOERR_UNLOCK"; break; case SQLITE_IOERR_RDLOCK: zVal = "SQLITE_IOERR_RDLOCK"; break; case SQLITE_IOERR_DELETE: zVal = "SQLITE_IOERR_DELETE"; break; case SQLITE_IOERR_BLOCKED: zVal = "SQLITE_IOERR_BLOCKED"; break; case SQLITE_IOERR_NOMEM: zVal = "SQLITE_IOERR_NOMEM"; break; case SQLITE_IOERR_ACCESS: zVal = "SQLITE_IOERR_ACCESS"; break; case SQLITE_IOERR_CHECKRESERVEDLOCK: zVal = "SQLITE_IOERR_CHECKRESERVEDLOCK"; break; case SQLITE_IOERR_LOCK: zVal = "SQLITE_IOERR_LOCK"; break; case SQLITE_IOERR_CLOSE: zVal = "SQLITE_IOERR_CLOSE"; break; case SQLITE_IOERR_DIR_CLOSE: zVal = "SQLITE_IOERR_DIR_CLOSE"; break; case SQLITE_IOERR_SHMOPEN: zVal = "SQLITE_IOERR_SHMOPEN"; break; case SQLITE_IOERR_SHMSIZE: zVal = "SQLITE_IOERR_SHMSIZE"; break; case SQLITE_IOERR_SHMLOCK: zVal = "SQLITE_IOERR_SHMLOCK"; break; case SQLITE_LOCKED_SHAREDCACHE: zVal = "SQLITE_LOCKED_SHAREDCACHE"; break; case SQLITE_BUSY_RECOVERY: zVal = "SQLITE_BUSY_RECOVERY"; break; case SQLITE_CANTOPEN_NOTEMPDIR: zVal = "SQLITE_CANTOPEN_NOTEMPDIR"; break; default: { sqlite3_snprintf(sizeof(zBuf), zBuf, "%d", rc); zVal = zBuf; break; } } vfstrace_printf(pInfo, zFormat, zVal); } /* ** Close an vfstrace-file. */ static int vfstraceClose(sqlite3_file *pFile){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xClose(%s)", pInfo->zVfsName, p->zFName); rc = p->pReal->pMethods->xClose(p->pReal); vfstrace_print_errcode(pInfo, " -> %s\n", rc); if( rc==SQLITE_OK ){ sqlite3_free((void*)p->base.pMethods); p->base.pMethods = 0; } return rc; } /* ** Read data from an vfstrace-file. */ static int vfstraceRead( sqlite3_file *pFile, void *zBuf, int iAmt, sqlite_int64 iOfst ){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xRead(%s,*,%d,%lld)", pInfo->zVfsName, p->zFName, iAmt, iOfst); rc = p->pReal->pMethods->xRead(p->pReal, zBuf, iAmt, iOfst); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Write data to an vfstrace-file. */ static int vfstraceWrite( sqlite3_file *pFile, const void *zBuf, int iAmt, sqlite_int64 iOfst ){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xWrite(%s,*,%d,%lld)", pInfo->zVfsName, p->zFName, iAmt, iOfst); rc = p->pReal->pMethods->xWrite(p->pReal, zBuf, iAmt, iOfst); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Truncate an vfstrace-file. */ static int vfstraceTruncate(sqlite3_file *pFile, sqlite_int64 size){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xTruncate(%s,%lld)", pInfo->zVfsName, p->zFName, size); rc = p->pReal->pMethods->xTruncate(p->pReal, size); vfstrace_printf(pInfo, " -> %d\n", rc); return rc; } /* ** Sync an vfstrace-file. */ static int vfstraceSync(sqlite3_file *pFile, int flags){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xSync(%s,%d)", pInfo->zVfsName, p->zFName, flags); rc = p->pReal->pMethods->xSync(p->pReal, flags); vfstrace_printf(pInfo, " -> %d\n", rc); return rc; } /* ** Return the current file-size of an vfstrace-file. */ static int vfstraceFileSize(sqlite3_file *pFile, sqlite_int64 *pSize){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xFileSize(%s)", pInfo->zVfsName, p->zFName); rc = p->pReal->pMethods->xFileSize(p->pReal, pSize); vfstrace_print_errcode(pInfo, " -> %s,", rc); vfstrace_printf(pInfo, " size=%lld\n", *pSize); return rc; } /* ** Lock an vfstrace-file. */ static int vfstraceLock(sqlite3_file *pFile, int eLock){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xLock(%s,%d)", pInfo->zVfsName, p->zFName, eLock); rc = p->pReal->pMethods->xLock(p->pReal, eLock); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Unlock an vfstrace-file. */ static int vfstraceUnlock(sqlite3_file *pFile, int eLock){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xUnlock(%s,%d)", pInfo->zVfsName, p->zFName,eLock); rc = p->pReal->pMethods->xUnlock(p->pReal, eLock); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Check if another file-handle holds a RESERVED lock on an vfstrace-file. */ static int vfstraceCheckReservedLock(sqlite3_file *pFile, int *pResOut){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xCheckReservedLock(%s,%d)", pInfo->zVfsName, p->zFName); rc = p->pReal->pMethods->xCheckReservedLock(p->pReal, pResOut); vfstrace_print_errcode(pInfo, " -> %s", rc); vfstrace_printf(pInfo, ", out=%d\n", *pResOut); return rc; } /* ** File control method. For custom operations on an vfstrace-file. */ static int vfstraceFileControl(sqlite3_file *pFile, int op, void *pArg){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xFileControl(%s,op=%d)", pInfo->zVfsName, p->zFName, op); rc = p->pReal->pMethods->xFileControl(p->pReal, op, pArg); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Return the sector-size in bytes for an vfstrace-file. */ static int vfstraceSectorSize(sqlite3_file *pFile){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xSectorSize(%s)", pInfo->zVfsName, p->zFName); rc = p->pReal->pMethods->xSectorSize(p->pReal); vfstrace_printf(pInfo, " -> %d\n", rc); return rc; } /* ** Return the device characteristic flags supported by an vfstrace-file. */ static int vfstraceDeviceCharacteristics(sqlite3_file *pFile){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xDeviceCharacteristics(%s)", pInfo->zVfsName, p->zFName); rc = p->pReal->pMethods->xDeviceCharacteristics(p->pReal); vfstrace_printf(pInfo, " -> 0x%08x\n", rc); return rc; } /* ** Shared-memory operations. */ static int vfstraceShmLock(sqlite3_file *pFile, int ofst, int n, int flags){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xShmLock(%s,ofst=%d,n=%d,flags=%d)", pInfo->zVfsName, p->zFName, ofst, n, flags); rc = p->pReal->pMethods->xShmLock(p->pReal, ofst, n, flags); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } static int vfstraceShmMap( sqlite3_file *pFile, int iRegion, int szRegion, int isWrite, void volatile **pp ){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xShmMap(%s,iRegion=%d,szRegion=%d,isWrite=%d,*)", pInfo->zVfsName, p->zFName, iRegion, szRegion, isWrite); rc = p->pReal->pMethods->xShmMap(p->pReal, iRegion, szRegion, isWrite, pp); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } static void vfstraceShmBarrier(sqlite3_file *pFile){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; vfstrace_printf(pInfo, "%s.xShmBarrier(%s)\n", pInfo->zVfsName, p->zFName); p->pReal->pMethods->xShmBarrier(p->pReal); } static int vfstraceShmUnmap(sqlite3_file *pFile, int delFlag){ vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = p->pInfo; int rc; vfstrace_printf(pInfo, "%s.xShmUnmap(%s,delFlag=%d)", pInfo->zVfsName, p->zFName, delFlag); rc = p->pReal->pMethods->xShmUnmap(p->pReal, delFlag); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Open an vfstrace file handle. */ static int vfstraceOpen( sqlite3_vfs *pVfs, const char *zName, sqlite3_file *pFile, int flags, int *pOutFlags ){ int rc; vfstrace_file *p = (vfstrace_file *)pFile; vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; p->pInfo = pInfo; p->zFName = fileTail(zName); p->pReal = (sqlite3_file *)&p[1]; rc = pRoot->xOpen(pRoot, zName, p->pReal, flags, pOutFlags); vfstrace_printf(pInfo, "%s.xOpen(%s,flags=0x%x)", pInfo->zVfsName, p->zFName, flags); if( p->pReal->pMethods ){ sqlite3_io_methods *pNew = sqlite3_malloc( sizeof(*pNew) ); const sqlite3_io_methods *pSub = p->pReal->pMethods; memset(pNew, 0, sizeof(*pNew)); pNew->iVersion = pSub->iVersion; pNew->xClose = vfstraceClose; pNew->xRead = vfstraceRead; pNew->xWrite = vfstraceWrite; pNew->xTruncate = vfstraceTruncate; pNew->xSync = vfstraceSync; pNew->xFileSize = vfstraceFileSize; pNew->xLock = vfstraceLock; pNew->xUnlock = vfstraceUnlock; pNew->xCheckReservedLock = vfstraceCheckReservedLock; pNew->xFileControl = vfstraceFileControl; pNew->xSectorSize = vfstraceSectorSize; pNew->xDeviceCharacteristics = vfstraceDeviceCharacteristics; if( pNew->iVersion>=2 ){ pNew->xShmMap = pSub->xShmMap ? vfstraceShmMap : 0; pNew->xShmLock = pSub->xShmLock ? vfstraceShmLock : 0; pNew->xShmBarrier = pSub->xShmBarrier ? vfstraceShmBarrier : 0; pNew->xShmUnmap = pSub->xShmUnmap ? vfstraceShmUnmap : 0; } pFile->pMethods = pNew; } vfstrace_print_errcode(pInfo, " -> %s", rc); vfstrace_printf(pInfo, ", outFlags=0x%x\n", *pOutFlags); return rc; } /* ** Delete the file located at zPath. If the dirSync argument is true, ** ensure the file-system modifications are synced to disk before ** returning. */ static int vfstraceDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; int rc; vfstrace_printf(pInfo, "%s.xDelete(\"%s\",%d)", pInfo->zVfsName, zPath, dirSync); rc = pRoot->xDelete(pRoot, zPath, dirSync); vfstrace_print_errcode(pInfo, " -> %s\n", rc); return rc; } /* ** Test for access permissions. Return true if the requested permission ** is available, or false otherwise. */ static int vfstraceAccess( sqlite3_vfs *pVfs, const char *zPath, int flags, int *pResOut ){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; int rc; vfstrace_printf(pInfo, "%s.xDelete(\"%s\",%d)", pInfo->zVfsName, zPath, flags); rc = pRoot->xAccess(pRoot, zPath, flags, pResOut); vfstrace_print_errcode(pInfo, " -> %s", rc); vfstrace_printf(pInfo, ", out=%d\n", *pResOut); return rc; } /* ** Populate buffer zOut with the full canonical pathname corresponding ** to the pathname in zPath. zOut is guaranteed to point to a buffer ** of at least (DEVSYM_MAX_PATHNAME+1) bytes. */ static int vfstraceFullPathname( sqlite3_vfs *pVfs, const char *zPath, int nOut, char *zOut ){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; int rc; vfstrace_printf(pInfo, "%s.xFullPathname(\"%s\")", pInfo->zVfsName, zPath); rc = pRoot->xFullPathname(pRoot, zPath, nOut, zOut); vfstrace_print_errcode(pInfo, " -> %s", rc); vfstrace_printf(pInfo, ", out=\"%.*s\"\n", nOut, zOut); return rc; } /* ** Open the dynamic library located at zPath and return a handle. */ static void *vfstraceDlOpen(sqlite3_vfs *pVfs, const char *zPath){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; vfstrace_printf(pInfo, "%s.xDlOpen(\"%s\")\n", pInfo->zVfsName, zPath); return pRoot->xDlOpen(pRoot, zPath); } /* ** Populate the buffer zErrMsg (size nByte bytes) with a human readable ** utf-8 string describing the most recent error encountered associated ** with dynamic libraries. */ static void vfstraceDlError(sqlite3_vfs *pVfs, int nByte, char *zErrMsg){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; vfstrace_printf(pInfo, "%s.xDlError(%d)", pInfo->zVfsName, nByte); pRoot->xDlError(pRoot, nByte, zErrMsg); vfstrace_printf(pInfo, " -> \"%s\"", zErrMsg); } /* ** Return a pointer to the symbol zSymbol in the dynamic library pHandle. */ static void (*vfstraceDlSym(sqlite3_vfs *pVfs,void *p,const char *zSym))(void){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; vfstrace_printf(pInfo, "%s.xDlSym(\"%s\")\n", pInfo->zVfsName, zSym); return pRoot->xDlSym(pRoot, p, zSym); } /* ** Close the dynamic library handle pHandle. */ static void vfstraceDlClose(sqlite3_vfs *pVfs, void *pHandle){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; vfstrace_printf(pInfo, "%s.xDlOpen()\n", pInfo->zVfsName); pRoot->xDlClose(pRoot, pHandle); } /* ** Populate the buffer pointed to by zBufOut with nByte bytes of ** random data. */ static int vfstraceRandomness(sqlite3_vfs *pVfs, int nByte, char *zBufOut){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; vfstrace_printf(pInfo, "%s.xRandomness(%d)\n", pInfo->zVfsName, nByte); return pRoot->xRandomness(pRoot, nByte, zBufOut); } /* ** Sleep for nMicro microseconds. Return the number of microseconds ** actually slept. */ static int vfstraceSleep(sqlite3_vfs *pVfs, int nMicro){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xSleep(pRoot, nMicro); } /* ** Return the current time as a Julian Day number in *pTimeOut. */ static int vfstraceCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xCurrentTime(pRoot, pTimeOut); } static int vfstraceCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *pTimeOut){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xCurrentTimeInt64(pRoot, pTimeOut); } /* ** Return th3 emost recent error code and message */ static int vfstraceGetLastError(sqlite3_vfs *pVfs, int iErr, char *zErr){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xGetLastError(pRoot, iErr, zErr); } /* ** Override system calls. */ static int vfstraceSetSystemCall( sqlite3_vfs *pVfs, const char *zName, void *pFunc ){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xSetSystemCall(pRoot, zName, pFunc); } static void *vfstraceGetSystemCall(sqlite3_vfs *pVfs, const char *zName){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xGetSystemCall(pRoot, zName); } static const char *vfstraceNextSystemCall(sqlite3_vfs *pVfs, const char *zName){ vfstrace_info *pInfo = (vfstrace_info*)pVfs->pAppData; sqlite3_vfs *pRoot = pInfo->pRootVfs; return pRoot->xNextSystemCall(pRoot, zName); } /* ** Clients invoke this routine to construct a new trace-vfs shim. ** ** Return SQLITE_OK on success. ** ** SQLITE_NOMEM is returned in the case of a memory allocation error. ** SQLITE_NOTFOUND is returned if zOldVfsName does not exist. */ int vfstrace_register( const char *zTraceName, /* Name of the newly constructed VFS */ const char *zOldVfsName, /* Name of the underlying VFS */ int (*xOut)(const char*,void*), /* Output routine. ex: fputs */ void *pOutArg, /* 2nd argument to xOut. ex: stderr */ int makeDefault /* True to make the new VFS the default */ ){ sqlite3_vfs *pNew; sqlite3_vfs *pRoot; vfstrace_info *pInfo; int nName; int nByte; pRoot = sqlite3_vfs_find(zOldVfsName); if( pRoot==0 ) return SQLITE_NOTFOUND; nName = strlen(zTraceName); nByte = sizeof(*pNew) + sizeof(*pInfo) + nName + 1; pNew = sqlite3_malloc( nByte ); if( pNew==0 ) return SQLITE_NOMEM; memset(pNew, 0, nByte); pInfo = (vfstrace_info*)&pNew[1]; pNew->iVersion = pRoot->iVersion; pNew->szOsFile = pRoot->szOsFile + sizeof(vfstrace_file); pNew->mxPathname = pRoot->mxPathname; pNew->zName = (char*)&pInfo[1]; memcpy((char*)&pInfo[1], zTraceName, nName+1); pNew->pAppData = pInfo; pNew->xOpen = vfstraceOpen; pNew->xDelete = vfstraceDelete; pNew->xAccess = vfstraceAccess; pNew->xFullPathname = vfstraceFullPathname; pNew->xDlOpen = pRoot->xDlOpen==0 ? 0 : vfstraceDlOpen; pNew->xDlError = pRoot->xDlError==0 ? 0 : vfstraceDlError; pNew->xDlSym = pRoot->xDlSym==0 ? 0 : vfstraceDlSym; pNew->xDlClose = pRoot->xDlClose==0 ? 0 : vfstraceDlClose; pNew->xRandomness = vfstraceRandomness; pNew->xSleep = vfstraceSleep; pNew->xCurrentTime = vfstraceCurrentTime; pNew->xGetLastError = pRoot->xGetLastError==0 ? 0 : vfstraceGetLastError; if( pNew->iVersion>=2 ){ pNew->xCurrentTimeInt64 = pRoot->xCurrentTimeInt64==0 ? 0 : vfstraceCurrentTimeInt64; if( pNew->iVersion>=3 ){ pNew->xSetSystemCall = pRoot->xSetSystemCall==0 ? 0 : vfstraceSetSystemCall; pNew->xGetSystemCall = pRoot->xGetSystemCall==0 ? 0 : vfstraceGetSystemCall; pNew->xNextSystemCall = pRoot->xNextSystemCall==0 ? 0 : vfstraceNextSystemCall; } } pInfo->pRootVfs = pRoot; pInfo->xOut = xOut; pInfo->pOutArg = pOutArg; pInfo->zVfsName = pNew->zName; pInfo->pTraceVfs = pNew; vfstrace_printf(pInfo, "%s.enabled_for(\"%s\")\n", pInfo->zVfsName, pRoot->zName); return sqlite3_vfs_register(pNew, makeDefault); } |