Use the sqlite3Fts3ErrMsg() function to set error message text in FTS3,

and to ensure that error messages are not overwritten and thus leaked.

FossilOrigin-Name: 605347e087ec5eb817f3c94f4616abe26c7ab66b

ext/fts3/fts3.c

@@ -508,6 +508,17 @@ static int fts3DisconnectMethod(sqlite3_vtab *pVtab){
   return SQLITE_OK;
 }
 
+/*
+** Write an error message into *pzErr
+*/
+void sqlite3Fts3ErrMsg(char **pzErr, const char *zFormat, ...){
+  va_list ap;
+  sqlite3_free(*pzErr);
+  va_start(ap, zFormat);
+  *pzErr = sqlite3_vmprintf(zFormat, ap);
+  va_end(ap);
+}
+
 /*
 ** Construct one or more SQL statements from the format string given
 ** and then evaluate those statements. The success code is written
@@ -1039,7 +1050,7 @@ static int fts3ContentColumns(
   }else{
     rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
     if( rc!=SQLITE_OK ){
-      *pzErr = sqlite3_mprintf("%s", sqlite3_errmsg(db));
+      sqlite3Fts3ErrMsg(pzErr, "%s", sqlite3_errmsg(db));
     }
   }
   sqlite3_free(zSql);
@@ -1207,13 +1218,13 @@ static int fts3InitVtab(
           }
         }
         if( iOpt==SizeofArray(aFts4Opt) ){
-          *pzErr = sqlite3_mprintf("unrecognized parameter: %s", z);
+          sqlite3Fts3ErrMsg(pzErr, "unrecognized parameter: %s", z);
           rc = SQLITE_ERROR;
         }else{
           switch( iOpt ){
             case 0:               /* MATCHINFO */
               if( strlen(zVal)!=4 || sqlite3_strnicmp(zVal, "fts3", 4) ){
-                *pzErr = sqlite3_mprintf("unrecognized matchinfo: %s", zVal);
+                sqlite3Fts3ErrMsg(pzErr, "unrecognized matchinfo: %s", zVal);
                 rc = SQLITE_ERROR;
               }
               bNoDocsize = 1;
@@ -1241,7 +1252,7 @@ static int fts3InitVtab(
               if( (strlen(zVal)!=3 || sqlite3_strnicmp(zVal, "asc", 3)) 
                && (strlen(zVal)!=4 || sqlite3_strnicmp(zVal, "desc", 4)) 
               ){
-                *pzErr = sqlite3_mprintf("unrecognized order: %s", zVal);
+                sqlite3Fts3ErrMsg(pzErr, "unrecognized order: %s", zVal);
                 rc = SQLITE_ERROR;
               }
               bDescIdx = (zVal[0]=='d' || zVal[0]=='D');
@@ -1327,7 +1338,7 @@ static int fts3InitVtab(
   rc = fts3PrefixParameter(zPrefix, &nIndex, &aIndex);
   if( rc==SQLITE_ERROR ){
     assert( zPrefix );
-    *pzErr = sqlite3_mprintf("error parsing prefix parameter: %s", zPrefix);
+    sqlite3Fts3ErrMsg(pzErr, "error parsing prefix parameter: %s", zPrefix);
   }
   if( rc!=SQLITE_OK ) goto fts3_init_out;
 
@@ -1409,7 +1420,7 @@ static int fts3InitVtab(
   }
   for(i=0; i<nNotindexed; i++){
     if( azNotindexed[i] ){
-      *pzErr = sqlite3_mprintf("no such column: %s", azNotindexed[i]);
+      sqlite3Fts3ErrMsg(pzErr, "no such column: %s", azNotindexed[i]);
       rc = SQLITE_ERROR;
     }
   }
@@ -1417,7 +1428,7 @@ static int fts3InitVtab(
   if( rc==SQLITE_OK && (zCompress==0)!=(zUncompress==0) ){
     char const *zMiss = (zCompress==0 ? "compress" : "uncompress");
     rc = SQLITE_ERROR;
-    *pzErr = sqlite3_mprintf("missing %s parameter in fts4 constructor", zMiss);
+    sqlite3Fts3ErrMsg(pzErr, "missing %s parameter in fts4 constructor", zMiss);
   }
   p->zReadExprlist = fts3ReadExprList(p, zUncompress, &rc);
   p->zWriteExprlist = fts3WriteExprList(p, zCompress, &rc);

ext/fts3/fts3Int.h

@@ -539,6 +539,7 @@ int sqlite3Fts3Incrmerge(Fts3Table*,int,int);
 )
 
 /* fts3.c */
+void sqlite3Fts3ErrMsg(char**,const char*,...);
 int sqlite3Fts3PutVarint(char *, sqlite3_int64);
 int sqlite3Fts3GetVarint(const char *, sqlite_int64 *);
 int sqlite3Fts3GetVarint32(const char *, int *);

ext/fts3/fts3_aux.c

@@ -116,7 +116,7 @@ static int fts3auxConnectMethod(
   return SQLITE_OK;
 
  bad_args:
-  *pzErr = sqlite3_mprintf("invalid arguments to fts4aux constructor");
+  sqlite3Fts3ErrMsg(pzErr, "invalid arguments to fts4aux constructor");
   return SQLITE_ERROR;
 }
 

ext/fts3/fts3_expr.c

@@ -1022,13 +1022,13 @@ int sqlite3Fts3ExprParse(
     sqlite3Fts3ExprFree(*ppExpr);
     *ppExpr = 0;
     if( rc==SQLITE_TOOBIG ){
-      *pzErr = sqlite3_mprintf(
+      sqlite3Fts3ErrMsg(pzErr,
           "FTS expression tree is too large (maximum depth %d)", 
           SQLITE_FTS3_MAX_EXPR_DEPTH
       );
       rc = SQLITE_ERROR;
     }else if( rc==SQLITE_ERROR ){
-      *pzErr = sqlite3_mprintf("malformed MATCH expression: [%s]", z);
+      sqlite3Fts3ErrMsg(pzErr, "malformed MATCH expression: [%s]", z);
     }
   }
 

ext/fts3/fts3_snippet.c

@@ -824,7 +824,7 @@ static int fts3MatchinfoCheck(
   ){
     return SQLITE_OK;
   }
-  *pzErr = sqlite3_mprintf("unrecognized matchinfo request: %c", cArg);
+  sqlite3Fts3ErrMsg(pzErr, "unrecognized matchinfo request: %c", cArg);
   return SQLITE_ERROR;
 }
 

ext/fts3/fts3_term.c

@@ -81,7 +81,7 @@ static int fts3termConnectMethod(
 
   /* The user should specify a single argument - the name of an fts3 table. */
   if( argc!=4 ){
-    *pzErr = sqlite3_mprintf(
+    sqlite3Fts3ErrMsg(pzErr,
         "wrong number of arguments to fts4term constructor"
     );
     return SQLITE_ERROR;

ext/fts3/fts3_tokenize_vtab.c

@@ -85,7 +85,7 @@ static int fts3tokQueryTokenizer(
 
   p = (sqlite3_tokenizer_module *)sqlite3Fts3HashFind(pHash, zName, nName+1);
   if( !p ){
-    *pzErr = sqlite3_mprintf("unknown tokenizer: %s", zName);
+    sqlite3Fts3ErrMsg(pzErr, "unknown tokenizer: %s", zName);
     return SQLITE_ERROR;
   }
 

ext/fts3/fts3_tokenizer.c

@@ -172,7 +172,7 @@ int sqlite3Fts3InitTokenizer(
 
   m = (sqlite3_tokenizer_module *)sqlite3Fts3HashFind(pHash,z,(int)strlen(z)+1);
   if( !m ){
-    *pzErr = sqlite3_mprintf("unknown tokenizer: %s", z);
+    sqlite3Fts3ErrMsg(pzErr, "unknown tokenizer: %s", z);
     rc = SQLITE_ERROR;
   }else{
     char const **aArg = 0;
@@ -195,7 +195,7 @@ int sqlite3Fts3InitTokenizer(
     rc = m->xCreate(iArg, aArg, ppTok);
     assert( rc!=SQLITE_OK || *ppTok );
     if( rc!=SQLITE_OK ){
-      *pzErr = sqlite3_mprintf("unknown tokenizer");
+      sqlite3Fts3ErrMsg(pzErr, "unknown tokenizer");
     }else{
       (*ppTok)->pModule = m; 
     }

manifest

@@ -1,5 +1,5 @@
-C Enhance\sthe\sCLI\sto\sinitialize\sthe\sdbstat\svirtual\stable\sif\scompiled\susing\nSQLITE_ENABLE_STAT_VTAB.
-D 2015-04-30T20:35:33.318
+C Use\sthe\ssqlite3Fts3ErrMsg()\sfunction\sto\sset\serror\smessage\stext\sin\sFTS3,\nand\sto\sensure\sthat\serror\smessages\sare\snot\soverwritten\sand\sthus\sleaked.
+D 2015-05-01T14:07:30.122
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in e3268d234210842b4be0a6e2e1c5990999f1d9f4
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -78,20 +78,20 @@ F ext/fts3/README.content fdc666a70d5257a64fee209f97cf89e0e6e32b51
 F ext/fts3/README.syntax a19711dc5458c20734b8e485e75fb1981ec2427a
 F ext/fts3/README.tokenizers e0a8b81383ea60d0334d274fadf305ea14a8c314
 F ext/fts3/README.txt 8c18f41574404623b76917b9da66fcb0ab38328d
-F ext/fts3/fts3.c 81f9ed55ad58614828ad9d8b1e0525ad78fede1b
+F ext/fts3/fts3.c 2fb98467f4b670c8934cdd97d1ba3ffa7382764c
 F ext/fts3/fts3.h 3a10a0af180d502cecc50df77b1b22df142817fe
-F ext/fts3/fts3Int.h 3626655d6ba903a3919bb44e1c38e5f0f9d6be82
-F ext/fts3/fts3_aux.c 5c211e17a64885faeb16b9ba7772f9d5445c2365
-F ext/fts3/fts3_expr.c 40123785eaa3ebd4c45c9b23407cc44ac0c49905
+F ext/fts3/fts3Int.h 59ecaa2d7af0da44c70b6aeaebdcfc070d14abab
+F ext/fts3/fts3_aux.c 9edc3655fcb287f0467d0a4b886a01c6185fe9f1
+F ext/fts3/fts3_expr.c 71c063da9c2a4167fb54aec089dd5ef33a58c9cb
 F ext/fts3/fts3_hash.c 29b986e43f4e9dd40110eafa377dc0d63c422c60
 F ext/fts3/fts3_hash.h 39cf6874dc239d6b4e30479b1975fe5b22a3caaf
 F ext/fts3/fts3_icu.c e319e108661147bcca8dd511cd562f33a1ba81b5
 F ext/fts3/fts3_porter.c 3565faf04b626cddf85f03825e86056a4562c009
-F ext/fts3/fts3_snippet.c 52c2dcf410b1f9af5a44d81a2cf8c68ed1cb5283
-F ext/fts3/fts3_term.c a521f75132f9a495bdca1bdd45949b3191c52763
+F ext/fts3/fts3_snippet.c 0ce4ee2451b9f3603a1693ef9779bb0fb662a9fe
+F ext/fts3/fts3_term.c 88c55a6fa1a51ab494e33dced0401a6c28791fd7
 F ext/fts3/fts3_test.c 8a3a78c4458b2d7c631fcf4b152a5cd656fa7038
-F ext/fts3/fts3_tokenize_vtab.c becc661223db7898b213f9e8a23d75bac02408c9
-F ext/fts3/fts3_tokenizer.c 9afd223b07740b14dd589edd3116acacf951fd78
+F ext/fts3/fts3_tokenize_vtab.c a27593ab19657166f6fa5ec073b678cc29a75860
+F ext/fts3/fts3_tokenizer.c 50e7a69a549ac5882cc1971ee43f66aaabc11395
 F ext/fts3/fts3_tokenizer.h 64c6ef6c5272c51ebe60fc607a896e84288fcbc3
 F ext/fts3/fts3_tokenizer1.c 5c98225a53705e5ee34824087478cf477bdb7004
 F ext/fts3/fts3_unicode.c a93f5edc0aff44ef8b06d7cb55b52026541ca145
@@ -1255,7 +1255,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 012a0c4e8485b1c2206ecff1946bf036bae04f3c 7ed86dd3b85ee092a19fe5d1e2fba39ce0166a2a
-R ce4ce0ea10f0361792c80aff76a3f2ab
+P 822dfc00173dad7703aa6413bb94f72f0da8e2c6
+R edaf3095e977d7fef12667cd98f7f94e
 U drh
-Z 7586895a6156132f56fe0bdc67703db2
+Z 8de4ba108eb3eec835d7a12530f79ecf

manifest.uuid

@@ -1 +1 @@
-822dfc00173dad7703aa6413bb94f72f0da8e2c6
+605347e087ec5eb817f3c94f4616abe26c7ab66b