1 /* 2 ** 2009 August 17 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 ** The code in this file is used for testing SQLite. It is not part of 14 ** the source code used in production systems. 15 ** 16 ** Specifically, this file tests the effect of errors while initializing 17 ** the various pluggable sub-systems from within sqlite3_initialize(). 18 ** If an error occurs in sqlite3_initialize() the following should be 19 ** true: 20 ** 21 ** 1) An error code is returned to the user, and 22 ** 2) A subsequent call to sqlite3_shutdown() calls the shutdown method 23 ** of those subsystems that were initialized, and 24 ** 3) A subsequent call to sqlite3_initialize() attempts to initialize 25 ** the remaining, uninitialized, subsystems. 26 */ 27 28 #include "sqliteInt.h" 29 #include <string.h> 30 #include <tcl.h> 31 32 static struct Wrapped { 33 sqlite3_pcache_methods2 pcache; 34 sqlite3_mem_methods mem; 35 sqlite3_mutex_methods mutex; 36 37 int mem_init; /* True if mem subsystem is initalized */ 38 int mem_fail; /* True to fail mem subsystem inialization */ 39 int mutex_init; /* True if mutex subsystem is initalized */ 40 int mutex_fail; /* True to fail mutex subsystem inialization */ 41 int pcache_init; /* True if pcache subsystem is initalized */ 42 int pcache_fail; /* True to fail pcache subsystem inialization */ 43 } wrapped; 44 45 static int wrMemInit(void *pAppData){ 46 int rc; 47 if( wrapped.mem_fail ){ 48 rc = SQLITE_ERROR; 49 }else{ 50 rc = wrapped.mem.xInit(wrapped.mem.pAppData); 51 } 52 if( rc==SQLITE_OK ){ 53 wrapped.mem_init = 1; 54 } 55 return rc; 56 } 57 static void wrMemShutdown(void *pAppData){ 58 wrapped.mem.xShutdown(wrapped.mem.pAppData); 59 wrapped.mem_init = 0; 60 } 61 static void *wrMemMalloc(int n) {return wrapped.mem.xMalloc(n);} 62 static void wrMemFree(void *p) {wrapped.mem.xFree(p);} 63 static void *wrMemRealloc(void *p, int n) {return wrapped.mem.xRealloc(p, n);} 64 static int wrMemSize(void *p) {return wrapped.mem.xSize(p);} 65 static int wrMemRoundup(int n) {return wrapped.mem.xRoundup(n);} 66 67 68 static int wrMutexInit(void){ 69 int rc; 70 if( wrapped.mutex_fail ){ 71 rc = SQLITE_ERROR; 72 }else{ 73 rc = wrapped.mutex.xMutexInit(); 74 } 75 if( rc==SQLITE_OK ){ 76 wrapped.mutex_init = 1; 77 } 78 return rc; 79 } 80 static int wrMutexEnd(void){ 81 wrapped.mutex.xMutexEnd(); 82 wrapped.mutex_init = 0; 83 return SQLITE_OK; 84 } 85 static sqlite3_mutex *wrMutexAlloc(int e){ 86 return wrapped.mutex.xMutexAlloc(e); 87 } 88 static void wrMutexFree(sqlite3_mutex *p){ 89 wrapped.mutex.xMutexFree(p); 90 } 91 static void wrMutexEnter(sqlite3_mutex *p){ 92 wrapped.mutex.xMutexEnter(p); 93 } 94 static int wrMutexTry(sqlite3_mutex *p){ 95 return wrapped.mutex.xMutexTry(p); 96 } 97 static void wrMutexLeave(sqlite3_mutex *p){ 98 wrapped.mutex.xMutexLeave(p); 99 } 100 static int wrMutexHeld(sqlite3_mutex *p){ 101 return wrapped.mutex.xMutexHeld(p); 102 } 103 static int wrMutexNotheld(sqlite3_mutex *p){ 104 return wrapped.mutex.xMutexNotheld(p); 105 } 106 107 108 109 static int wrPCacheInit(void *pArg){ 110 int rc; 111 if( wrapped.pcache_fail ){ 112 rc = SQLITE_ERROR; 113 }else{ 114 rc = wrapped.pcache.xInit(wrapped.pcache.pArg); 115 } 116 if( rc==SQLITE_OK ){ 117 wrapped.pcache_init = 1; 118 } 119 return rc; 120 } 121 static void wrPCacheShutdown(void *pArg){ 122 wrapped.pcache.xShutdown(wrapped.pcache.pArg); 123 wrapped.pcache_init = 0; 124 } 125 126 static sqlite3_pcache *wrPCacheCreate(int a, int b, int c){ 127 return wrapped.pcache.xCreate(a, b, c); 128 } 129 static void wrPCacheCachesize(sqlite3_pcache *p, int n){ 130 wrapped.pcache.xCachesize(p, n); 131 } 132 static int wrPCachePagecount(sqlite3_pcache *p){ 133 return wrapped.pcache.xPagecount(p); 134 } 135 static sqlite3_pcache_page *wrPCacheFetch(sqlite3_pcache *p, unsigned a, int b){ 136 return wrapped.pcache.xFetch(p, a, b); 137 } 138 static void wrPCacheUnpin(sqlite3_pcache *p, sqlite3_pcache_page *a, int b){ 139 wrapped.pcache.xUnpin(p, a, b); 140 } 141 static void wrPCacheRekey( 142 sqlite3_pcache *p, 143 sqlite3_pcache_page *a, 144 unsigned b, 145 unsigned c 146 ){ 147 wrapped.pcache.xRekey(p, a, b, c); 148 } 149 static void wrPCacheTruncate(sqlite3_pcache *p, unsigned a){ 150 wrapped.pcache.xTruncate(p, a); 151 } 152 static void wrPCacheDestroy(sqlite3_pcache *p){ 153 wrapped.pcache.xDestroy(p); 154 } 155 156 static void installInitWrappers(void){ 157 sqlite3_mutex_methods mutexmethods = { 158 wrMutexInit, wrMutexEnd, wrMutexAlloc, 159 wrMutexFree, wrMutexEnter, wrMutexTry, 160 wrMutexLeave, wrMutexHeld, wrMutexNotheld 161 }; 162 sqlite3_pcache_methods2 pcachemethods = { 163 1, 0, 164 wrPCacheInit, wrPCacheShutdown, wrPCacheCreate, 165 wrPCacheCachesize, wrPCachePagecount, wrPCacheFetch, 166 wrPCacheUnpin, wrPCacheRekey, wrPCacheTruncate, 167 wrPCacheDestroy 168 }; 169 sqlite3_mem_methods memmethods = { 170 wrMemMalloc, wrMemFree, wrMemRealloc, 171 wrMemSize, wrMemRoundup, wrMemInit, 172 wrMemShutdown, 173 0 174 }; 175 176 memset(&wrapped, 0, sizeof(wrapped)); 177 178 sqlite3_shutdown(); 179 sqlite3_config(SQLITE_CONFIG_GETMUTEX, &wrapped.mutex); 180 sqlite3_config(SQLITE_CONFIG_GETMALLOC, &wrapped.mem); 181 sqlite3_config(SQLITE_CONFIG_GETPCACHE2, &wrapped.pcache); 182 sqlite3_config(SQLITE_CONFIG_MUTEX, &mutexmethods); 183 sqlite3_config(SQLITE_CONFIG_MALLOC, &memmethods); 184 sqlite3_config(SQLITE_CONFIG_PCACHE2, &pcachemethods); 185 } 186 187 static int init_wrapper_install( 188 ClientData clientData, /* Unused */ 189 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 190 int objc, /* Number of arguments */ 191 Tcl_Obj *CONST objv[] /* Command arguments */ 192 ){ 193 int i; 194 installInitWrappers(); 195 for(i=1; i<objc; i++){ 196 char *z = Tcl_GetString(objv[i]); 197 if( strcmp(z, "mem")==0 ){ 198 wrapped.mem_fail = 1; 199 }else if( strcmp(z, "mutex")==0 ){ 200 wrapped.mutex_fail = 1; 201 }else if( strcmp(z, "pcache")==0 ){ 202 wrapped.pcache_fail = 1; 203 }else{ 204 Tcl_AppendResult(interp, "Unknown argument: \"", z, "\""); 205 return TCL_ERROR; 206 } 207 } 208 return TCL_OK; 209 } 210 211 static int init_wrapper_uninstall( 212 ClientData clientData, /* Unused */ 213 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 214 int objc, /* Number of arguments */ 215 Tcl_Obj *CONST objv[] /* Command arguments */ 216 ){ 217 if( objc!=1 ){ 218 Tcl_WrongNumArgs(interp, 1, objv, ""); 219 return TCL_ERROR; 220 } 221 222 sqlite3_shutdown(); 223 sqlite3_config(SQLITE_CONFIG_MUTEX, &wrapped.mutex); 224 sqlite3_config(SQLITE_CONFIG_MALLOC, &wrapped.mem); 225 sqlite3_config(SQLITE_CONFIG_PCACHE2, &wrapped.pcache); 226 return TCL_OK; 227 } 228 229 static int init_wrapper_clear( 230 ClientData clientData, /* Unused */ 231 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 232 int objc, /* Number of arguments */ 233 Tcl_Obj *CONST objv[] /* Command arguments */ 234 ){ 235 if( objc!=1 ){ 236 Tcl_WrongNumArgs(interp, 1, objv, ""); 237 return TCL_ERROR; 238 } 239 240 wrapped.mem_fail = 0; 241 wrapped.mutex_fail = 0; 242 wrapped.pcache_fail = 0; 243 return TCL_OK; 244 } 245 246 static int init_wrapper_query( 247 ClientData clientData, /* Unused */ 248 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 249 int objc, /* Number of arguments */ 250 Tcl_Obj *CONST objv[] /* Command arguments */ 251 ){ 252 Tcl_Obj *pRet; 253 254 if( objc!=1 ){ 255 Tcl_WrongNumArgs(interp, 1, objv, ""); 256 return TCL_ERROR; 257 } 258 259 pRet = Tcl_NewObj(); 260 if( wrapped.mutex_init ){ 261 Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj("mutex", -1)); 262 } 263 if( wrapped.mem_init ){ 264 Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj("mem", -1)); 265 } 266 if( wrapped.pcache_init ){ 267 Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj("pcache", -1)); 268 } 269 270 Tcl_SetObjResult(interp, pRet); 271 return TCL_OK; 272 } 273 274 int Sqlitetest_init_Init(Tcl_Interp *interp){ 275 static struct { 276 char *zName; 277 Tcl_ObjCmdProc *xProc; 278 } aObjCmd[] = { 279 {"init_wrapper_install", init_wrapper_install}, 280 {"init_wrapper_query", init_wrapper_query }, 281 {"init_wrapper_uninstall", init_wrapper_uninstall}, 282 {"init_wrapper_clear", init_wrapper_clear} 283 }; 284 int i; 285 286 for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){ 287 Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0); 288 } 289 290 return TCL_OK; 291 } 292