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If sqlite3_column_value() is called to obtain a value with the MEM_Static flag set, clear it and set the MEM_Ephem flag before returning. Otherwise, if the value is passed to sqlite3_bind_value() or sqlite3_result_value(), sqlite may attempt to use the buffer after the statement has been finalized. This is not always valid, as MEM_Static only guarantees that a MEM.z buffer will be valid for the lifetime of the owner statement, not that it is actually a static buffer. (CVS 5812)

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FossilOrigin-Name: b055bfc4e5268d8a66d6a4f5e8aec1285fe4b8e7
This commit is contained in:
danielk1977
2008-10-13 10:37:49 +00:00
parent a3465f2d78
commit d0ffa1e815
5 changed files with 51 additions and 15 deletions
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10
src/vdbeapi.c
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@@ -13,7 +13,7 @@
** This file contains code use to implement APIs that are part of the
** VDBE.
**
** $Id: vdbeapi.c,v 1.146 2008/10/12 00:27:54 shane Exp $
** $Id: vdbeapi.c,v 1.147 2008/10/13 10:37:50 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "vdbeInt.h"
@@ -837,9 +837,13 @@ const unsigned char *sqlite3_column_text(sqlite3_stmt *pStmt, int i){
return val;
}
sqlite3_value *sqlite3_column_value(sqlite3_stmt *pStmt, int i){
sqlite3_value *pOut = columnMem(pStmt, i);
Mem *pOut = columnMem(pStmt, i);
if( pOut->flags&MEM_Static ){
pOut->flags &= ~MEM_Static;
pOut->flags |= MEM_Ephem;
}
columnMallocFailure(pStmt);
return pOut;
return (sqlite3_value *)pOut;
}
#ifndef SQLITE_OMIT_UTF16
const void *sqlite3_column_text16(sqlite3_stmt *pStmt, int i){