431   sqlite3_vfs *pVfs;   in test_syscall_install()  local
443   pVfs = sqlite3_vfs_find(0);  in test_syscall_install()
452       aSyscall[iCall].xOrig = pVfs->xGetSystemCall(pVfs, aSyscall[iCall].zName);  in test_syscall_install()
453       pVfs->xSetSystemCall(pVfs, aSyscall[iCall].zName, aSyscall[iCall].xTest);  in test_syscall_install()
467   sqlite3_vfs *pVfs;   in test_syscall_uninstall()  local
475   pVfs = sqlite3_vfs_find(0);  in test_syscall_uninstall()
478       pVfs->xSetSystemCall(pVfs, aSyscall[i].zName, 0);  in test_syscall_uninstall()
491   sqlite3_vfs *pVfs;   in test_syscall_reset()  local
500   pVfs = sqlite3_vfs_find(0);  in test_syscall_reset()
502     rc = pVfs->xSetSystemCall(pVfs, 0, 0);  in test_syscall_reset()
507     rc = pVfs->xSetSystemCall(pVfs, Tcl_GetString(objv[2]), 0);  in test_syscall_reset()
529   sqlite3_vfs *pVfs;   in test_syscall_exists()  local
537   pVfs = sqlite3_vfs_find(0);  in test_syscall_exists()
538   x = pVfs->xGetSystemCall(pVfs, Tcl_GetString(objv[2]));  in test_syscall_exists()
626   sqlite3_vfs *pVfs;   in test_syscall_list()  local
634   pVfs = sqlite3_vfs_find(0);  in test_syscall_list()
637   for(zSys = pVfs->xNextSystemCall(pVfs, 0);   in test_syscall_list()
639       zSys = pVfs->xNextSystemCall(pVfs, zSys)  in test_syscall_list()
655   sqlite3_vfs *pVfs;   in test_syscall_defaultvfs()  local
662   pVfs = sqlite3_vfs_find(0);  in test_syscall_defaultvfs()
663   Tcl_SetObjResult(interp, Tcl_NewStringObj(pVfs->zName, -1));  in test_syscall_defaultvfs()
677   sqlite3_vfs *pVfs = sqlite3_vfs_find(0);  in test_syscall_pagesize()  local
689       pVfs->xSetSystemCall(pVfs, "getpagesize", gSyscall.orig_getpagesize);  in test_syscall_pagesize()
696     gSyscall.orig_getpagesize = pVfs->xGetSystemCall(pVfs, "getpagesize");  in test_syscall_pagesize()
698     pVfs->xSetSystemCall(  in test_syscall_pagesize()
699         pVfs, "getpagesize", (sqlite3_syscall_ptr)ts_getpagesize  in test_syscall_pagesize()
729   sqlite3_vfs *pVfs = sqlite3_vfs_find(0);  in test_syscall()  local
735   if( pVfs->iVersion<3 || pVfs->xSetSystemCall==0 ){  in test_syscall()