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_methods 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){ 127 return wrapped.pcache.xCreate(a, b); 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 void *wrPCacheFetch(sqlite3_pcache *p, unsigned a, int b){ 136 return wrapped.pcache.xFetch(p, a, b); 137 } 138 static void wrPCacheUnpin(sqlite3_pcache *p, void *a, int b){ 139 wrapped.pcache.xUnpin(p, a, b); 140 } 141 static void wrPCacheRekey(sqlite3_pcache *p, void *a, unsigned b, unsigned c){ 142 wrapped.pcache.xRekey(p, a, b, c); 143 } 144 static void wrPCacheTruncate(sqlite3_pcache *p, unsigned a){ 145 wrapped.pcache.xTruncate(p, a); 146 } 147 static void wrPCacheDestroy(sqlite3_pcache *p){ 148 wrapped.pcache.xDestroy(p); 149 } 150 151 static void installInitWrappers(void){ 152 sqlite3_mutex_methods mutexmethods = { 153 wrMutexInit, wrMutexEnd, wrMutexAlloc, 154 wrMutexFree, wrMutexEnter, wrMutexTry, 155 wrMutexLeave, wrMutexHeld, wrMutexNotheld 156 }; 157 sqlite3_pcache_methods pcachemethods = { 158 0, 159 wrPCacheInit, wrPCacheShutdown, wrPCacheCreate, 160 wrPCacheCachesize, wrPCachePagecount, wrPCacheFetch, 161 wrPCacheUnpin, wrPCacheRekey, wrPCacheTruncate, 162 wrPCacheDestroy 163 }; 164 sqlite3_mem_methods memmethods = { 165 wrMemMalloc, wrMemFree, wrMemRealloc, 166 wrMemSize, wrMemRoundup, wrMemInit, 167 wrMemShutdown, 168 0 169 }; 170 171 memset(&wrapped, 0, sizeof(wrapped)); 172 173 sqlite3_shutdown(); 174 sqlite3_config(SQLITE_CONFIG_GETMUTEX, &wrapped.mutex); 175 sqlite3_config(SQLITE_CONFIG_GETMALLOC, &wrapped.mem); 176 sqlite3_config(SQLITE_CONFIG_GETPCACHE, &wrapped.pcache); 177 sqlite3_config(SQLITE_CONFIG_MUTEX, &mutexmethods); 178 sqlite3_config(SQLITE_CONFIG_MALLOC, &memmethods); 179 sqlite3_config(SQLITE_CONFIG_PCACHE, &pcachemethods); 180 } 181 182 static int init_wrapper_install( 183 ClientData clientData, /* Unused */ 184 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 185 int objc, /* Number of arguments */ 186 Tcl_Obj *CONST objv[] /* Command arguments */ 187 ){ 188 int i; 189 installInitWrappers(); 190 for(i=1; i<objc; i++){ 191 char *z = Tcl_GetString(objv[i]); 192 if( strcmp(z, "mem")==0 ){ 193 wrapped.mem_fail = 1; 194 }else if( strcmp(z, "mutex")==0 ){ 195 wrapped.mutex_fail = 1; 196 }else if( strcmp(z, "pcache")==0 ){ 197 wrapped.pcache_fail = 1; 198 }else{ 199 Tcl_AppendResult(interp, "Unknown argument: \"", z, "\""); 200 return TCL_ERROR; 201 } 202 } 203 return TCL_OK; 204 } 205 206 static int init_wrapper_uninstall( 207 ClientData clientData, /* Unused */ 208 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 209 int objc, /* Number of arguments */ 210 Tcl_Obj *CONST objv[] /* Command arguments */ 211 ){ 212 if( objc!=1 ){ 213 Tcl_WrongNumArgs(interp, 1, objv, ""); 214 return TCL_ERROR; 215 } 216 217 memset(&wrapped, 0, sizeof(&wrapped)); 218 sqlite3_shutdown(); 219 sqlite3_config(SQLITE_CONFIG_MUTEX, &wrapped.mutex); 220 sqlite3_config(SQLITE_CONFIG_MALLOC, &wrapped.mem); 221 sqlite3_config(SQLITE_CONFIG_PCACHE, &wrapped.pcache); 222 return TCL_OK; 223 } 224 225 static int init_wrapper_clear( 226 ClientData clientData, /* Unused */ 227 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 228 int objc, /* Number of arguments */ 229 Tcl_Obj *CONST objv[] /* Command arguments */ 230 ){ 231 if( objc!=1 ){ 232 Tcl_WrongNumArgs(interp, 1, objv, ""); 233 return TCL_ERROR; 234 } 235 236 wrapped.mem_fail = 0; 237 wrapped.mutex_fail = 0; 238 wrapped.pcache_fail = 0; 239 return TCL_OK; 240 } 241 242 static int init_wrapper_query( 243 ClientData clientData, /* Unused */ 244 Tcl_Interp *interp, /* The TCL interpreter that invoked this command */ 245 int objc, /* Number of arguments */ 246 Tcl_Obj *CONST objv[] /* Command arguments */ 247 ){ 248 Tcl_Obj *pRet; 249 250 if( objc!=1 ){ 251 Tcl_WrongNumArgs(interp, 1, objv, ""); 252 return TCL_ERROR; 253 } 254 255 pRet = Tcl_NewObj(); 256 if( wrapped.mutex_init ){ 257 Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj("mutex", -1)); 258 } 259 if( wrapped.mem_init ){ 260 Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj("mem", -1)); 261 } 262 if( wrapped.pcache_init ){ 263 Tcl_ListObjAppendElement(interp, pRet, Tcl_NewStringObj("pcache", -1)); 264 } 265 266 Tcl_SetObjResult(interp, pRet); 267 return TCL_OK; 268 } 269 270 int Sqlitetest_init_Init(Tcl_Interp *interp){ 271 static struct { 272 char *zName; 273 Tcl_ObjCmdProc *xProc; 274 } aObjCmd[] = { 275 {"init_wrapper_install", init_wrapper_install}, 276 {"init_wrapper_query", init_wrapper_query }, 277 {"init_wrapper_uninstall", init_wrapper_uninstall}, 278 {"init_wrapper_clear", init_wrapper_clear} 279 }; 280 int i; 281 282 for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){ 283 Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0); 284 } 285 286 return TCL_OK; 287 } 288
