If a virtual table xSync() returns an error message, copy it into a buffer allocated by sqlite3DbMalloc() before transfering it to Vdbe.zErrMsg.

FossilOrigin-Name: 854ba3049005adf033e07e6740a36e63f2a56758

manifest

@@ -1,5 +1,5 @@
-C Performance\senhancement\sin\sbtreeParseCellPtr().
+C If\sa\svirtual\stable\sxSync()\sreturns\san\serror\smessage,\scopy\sit\sinto\sa\sbuffer\sallocated\sby\ssqlite3DbMalloc()\sbefore\stransfering\sit\sto\sVdbe.zErrMsg.
-D 2013-08-21T15:52:22.167
+D 2013-08-21T17:35:48.189
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -221,7 +221,7 @@ F src/shell.c 1c317a4c96d61d8d9fdad9fd1811d9b10b8c7f57
 F src/sqlite.h.in bd1451ba1ab681022a53bccc3c39580ba094a3ff
 F src/sqlite3.rc fea433eb0a59f4c9393c8e6d76a6e2596b1fe0c0
 F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
-F src/sqliteInt.h eae58298bc7c9a491ad2fc6c600f534b74be8a11
+F src/sqliteInt.h e4ae9edb97983a8d7d751559391962cf7668948c
 F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
 F src/status.c 7ac05a5c7017d0b9f0b4bcd701228b784f987158
 F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
@@ -277,16 +277,16 @@ F src/update.c 7f3fe64d8f3b44c44a1eac293f0f85f87c355b7a
 F src/utf.c 8d819e2e5104a430fc2005f018db14347c95a38f
 F src/util.c f566b5138099a2df8533b190d0dcc74b7dfbe0c9
 F src/vacuum.c d9c5759f4c5a438bb43c2086f72c5d2edabc36c8
-F src/vdbe.c 938feb53407dee2234849aad0f103ae9b941595e
+F src/vdbe.c d37aee2c89e2a589f2b1599e0178eb17a08a3ccb
 F src/vdbe.h 4f554b5627f26710c4c36d919110a3fc611ca5c4
 F src/vdbeInt.h cbe71b8b36d8b3bba5709cc3f436c7e3b47b7b08
 F src/vdbeapi.c 96b24b946cf21894f63d9393e821baa2f0a80979
-F src/vdbeaux.c a6ea36a9dc714e1128a0173249a0532ddcab0489
+F src/vdbeaux.c c7fe2695e256dbf254113c4fe90d3ec9aabe3bbe
 F src/vdbeblob.c 5dc79627775bd9a9b494dd956e26297946417d69
 F src/vdbemem.c 833005f1cbbf447289f1973dba2a0c2228c7b8ab
 F src/vdbesort.c 3937e06b2a0e354500e17dc206ef4c35770a5017
 F src/vdbetrace.c e7ec40e1999ff3c6414424365d5941178966dcbc
-F src/vtab.c 2e8b489db47e20ae36cd247932dc671c9ded0624
+F src/vtab.c 165ce0e797c2cd23badb104c9f2ae9042d6d942c
 F src/wal.c 7dc3966ef98b74422267e7e6e46e07ff6c6eb1b4
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c 4fa43583d0a84b48f93b1e88f11adf2065be4e73
@@ -1105,7 +1105,7 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P 5f35c8cb8f8b67121c70f98c02c4aa7c25327690
+P a17190a2296e8cd5e59524ff5914fc5ea3560697
-R e14622f8e8b62bb772b89104f8221b5c
+R 960d322e69aedcdd76cb08d63bcf1bec
-U drh
+U dan
-Z b5924f726ed7a29e078b915e4c18ae4c
+Z adc03a3c46cd4ac4ea0aa84c35a35580

manifest.uuid

@@ -1 +1 @@
-a17190a2296e8cd5e59524ff5914fc5ea3560697
+854ba3049005adf033e07e6740a36e63f2a56758

src/sqliteInt.h

@@ -3153,13 +3153,14 @@ void sqlite3AutoLoadExtensions(sqlite3*);
 #else
    void sqlite3VtabClear(sqlite3 *db, Table*);
    void sqlite3VtabDisconnect(sqlite3 *db, Table *p);
-   int sqlite3VtabSync(sqlite3 *db, char **);
+   int sqlite3VtabSync(sqlite3 *db, Vdbe*);
    int sqlite3VtabRollback(sqlite3 *db);
    int sqlite3VtabCommit(sqlite3 *db);
    void sqlite3VtabLock(VTable *);
    void sqlite3VtabUnlock(VTable *);
    void sqlite3VtabUnlockList(sqlite3*);
    int sqlite3VtabSavepoint(sqlite3 *, int, int);
+   void sqlite3VtabImportErrmsg(Vdbe*, sqlite3_vtab*);
    VTable *sqlite3GetVTable(sqlite3*, Table*);
 #  define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0)
 #endif

src/vdbe.c

@@ -497,19 +497,6 @@ static int checkSavepointCount(sqlite3 *db){
 }
 #endif
 
-/*
-** Transfer error message text from an sqlite3_vtab.zErrMsg (text stored
-** in memory obtained from sqlite3_malloc) into a Vdbe.zErrMsg (text stored
-** in memory obtained from sqlite3DbMalloc).
-*/
-static void importVtabErrMsg(Vdbe *p, sqlite3_vtab *pVtab){
-  sqlite3 *db = p->db;
-  sqlite3DbFree(db, p->zErrMsg);
-  p->zErrMsg = sqlite3DbStrDup(db, pVtab->zErrMsg);
-  sqlite3_free(pVtab->zErrMsg);
-  pVtab->zErrMsg = 0;
-}
-
 
 /*
 ** Execute as much of a VDBE program as we can then return.
@@ -4350,7 +4337,7 @@ case OP_Rowid: {                 /* out2-prerelease */
     pModule = pVtab->pModule;
     assert( pModule->xRowid );
     rc = pModule->xRowid(pC->pVtabCursor, &v);
-    importVtabErrMsg(p, pVtab);
+    sqlite3VtabImportErrmsg(p, pVtab);
 #endif /* SQLITE_OMIT_VIRTUALTABLE */
   }else{
     assert( pC->pCursor!=0 );
@@ -5743,7 +5730,7 @@ case OP_VBegin: {
   VTable *pVTab;
   pVTab = pOp->p4.pVtab;
   rc = sqlite3VtabBegin(db, pVTab);
-  if( pVTab ) importVtabErrMsg(p, pVTab->pVtab);
+  if( pVTab ) sqlite3VtabImportErrmsg(p, pVTab->pVtab);
   break;
 }
 #endif /* SQLITE_OMIT_VIRTUALTABLE */
@@ -5794,7 +5781,7 @@ case OP_VOpen: {
   pModule = (sqlite3_module *)pVtab->pModule;
   assert(pVtab && pModule);
   rc = pModule->xOpen(pVtab, &pVtabCursor);
-  importVtabErrMsg(p, pVtab);
+  sqlite3VtabImportErrmsg(p, pVtab);
   if( SQLITE_OK==rc ){
     /* Initialize sqlite3_vtab_cursor base class */
     pVtabCursor->pVtab = pVtab;
@@ -5872,7 +5859,7 @@ case OP_VFilter: {   /* jump */
     p->inVtabMethod = 1;
     rc = pModule->xFilter(pVtabCursor, iQuery, pOp->p4.z, nArg, apArg);
     p->inVtabMethod = 0;
-    importVtabErrMsg(p, pVtab);
+    sqlite3VtabImportErrmsg(p, pVtab);
     if( rc==SQLITE_OK ){
       res = pModule->xEof(pVtabCursor);
     }
@@ -5923,7 +5910,7 @@ case OP_VColumn: {
   MemSetTypeFlag(&sContext.s, MEM_Null);
 
   rc = pModule->xColumn(pCur->pVtabCursor, &sContext, pOp->p2);
-  importVtabErrMsg(p, pVtab);
+  sqlite3VtabImportErrmsg(p, pVtab);
   if( sContext.isError ){
     rc = sContext.isError;
   }
@@ -5976,7 +5963,7 @@ case OP_VNext: {   /* jump */
   p->inVtabMethod = 1;
   rc = pModule->xNext(pCur->pVtabCursor);
   p->inVtabMethod = 0;
-  importVtabErrMsg(p, pVtab);
+  sqlite3VtabImportErrmsg(p, pVtab);
   if( rc==SQLITE_OK ){
     res = pModule->xEof(pCur->pVtabCursor);
   }
@@ -6013,7 +6000,7 @@ case OP_VRename: {
   rc = sqlite3VdbeChangeEncoding(pName, SQLITE_UTF8);
   if( rc==SQLITE_OK ){
     rc = pVtab->pModule->xRename(pVtab, pName->z);
-    importVtabErrMsg(p, pVtab);
+    sqlite3VtabImportErrmsg(p, pVtab);
     p->expired = 0;
   }
   break;
@@ -6075,7 +6062,7 @@ case OP_VUpdate: {
     db->vtabOnConflict = pOp->p5;
     rc = pModule->xUpdate(pVtab, nArg, apArg, &rowid);
     db->vtabOnConflict = vtabOnConflict;
-    importVtabErrMsg(p, pVtab);
+    sqlite3VtabImportErrmsg(p, pVtab);
     if( rc==SQLITE_OK && pOp->p1 ){
       assert( nArg>1 && apArg[0] && (apArg[0]->flags&MEM_Null) );
       db->lastRowid = lastRowid = rowid;

src/vdbeaux.c

@@ -1765,7 +1765,7 @@ static int vdbeCommit(sqlite3 *db, Vdbe *p){
   ** required, as an xSync() callback may add an attached database
   ** to the transaction.
   */
-  rc = sqlite3VtabSync(db, &p->zErrMsg);
+  rc = sqlite3VtabSync(db, p);
 
   /* This loop determines (a) if the commit hook should be invoked and
   ** (b) how many database files have open write transactions, not 
@@ -3304,3 +3304,18 @@ void sqlite3VdbeSetVarmask(Vdbe *v, int iVar){
     v->expmask |= ((u32)1 << (iVar-1));
   }
 }
+
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+/*
+** Transfer error message text from an sqlite3_vtab.zErrMsg (text stored
+** in memory obtained from sqlite3_malloc) into a Vdbe.zErrMsg (text stored
+** in memory obtained from sqlite3DbMalloc).
+*/
+void sqlite3VtabImportErrmsg(Vdbe *p, sqlite3_vtab *pVtab){
+  sqlite3 *db = p->db;
+  sqlite3DbFree(db, p->zErrMsg);
+  p->zErrMsg = sqlite3DbStrDup(db, pVtab->zErrMsg);
+  sqlite3_free(pVtab->zErrMsg);
+  pVtab->zErrMsg = 0;
+}
+#endif /* SQLITE_OMIT_VIRTUALTABLE */

src/vtab.c

@@ -810,10 +810,9 @@ static void callFinaliser(sqlite3 *db, int offset){
 ** array. Return the error code for the first error that occurs, or
 ** SQLITE_OK if all xSync operations are successful.
 **
-** Set *pzErrmsg to point to a buffer that should be released using 
+** If an error message is available, leave it in p->zErrMsg.
-** sqlite3DbFree() containing an error message, if one is available.
 */
-int sqlite3VtabSync(sqlite3 *db, char **pzErrmsg){
+int sqlite3VtabSync(sqlite3 *db, Vdbe *p){
   int i;
   int rc = SQLITE_OK;
   VTable **aVTrans = db->aVTrans;
@@ -824,9 +823,7 @@ int sqlite3VtabSync(sqlite3 *db, char **pzErrmsg){
     sqlite3_vtab *pVtab = aVTrans[i]->pVtab;
     if( pVtab && (x = pVtab->pModule->xSync)!=0 ){
       rc = x(pVtab);
-      sqlite3DbFree(db, *pzErrmsg);
+      sqlite3VtabImportErrmsg(p, pVtab);
-      *pzErrmsg = pVtab->zErrMsg;
-      pVtab->zErrMsg = 0;
     }
   }
   db->aVTrans = aVTrans;