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Overview
| Comment: | Make sure deleting an unused prepared statement does not reference uninitialized fields in the structure. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 7983eef0422439bfc85950554b000d46a9767ee3 |
| User & Date: | drh 2016-10-01 16:53:45 |
Context
|
2016-10-01
| ||
| 19:21 | Use sqlite3DbMallocRawNN() where appropriate, instead of sqlite3DbMallocRaw(). check-in: 54a449a4 user: drh tags: trunk | |
| 16:53 | Make sure deleting an unused prepared statement does not reference uninitialized fields in the structure. check-in: 7983eef0 user: drh tags: trunk | |
| 11:39 | Avoid accessing Vdbe.pc if it is uninitialized. Check Vdbe.magic first. check-in: 6ac6e446 user: drh tags: trunk | |
Changes
Changes to src/vdbeaux.c.
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** VdbeDelete() also unlinks the Vdbe from the list of VMs associated with
** the database connection and frees the object itself.
*/
void sqlite3VdbeClearObject(sqlite3 *db, Vdbe *p){
SubProgram *pSub, *pNext;
int i;
assert( p->db==0 || p->db==db );
releaseMemArray(p->aVar, p->nVar);
releaseMemArray(p->aColName, p->nResColumn*COLNAME_N);
for(pSub=p->pProgram; pSub; pSub=pNext){
pNext = pSub->pNext;
vdbeFreeOpArray(db, pSub->aOp, pSub->nOp);
sqlite3DbFree(db, pSub);
}
if( p->magic!=VDBE_MAGIC_INIT ){
for(i=p->nzVar-1; i>=0; i--) sqlite3DbFree(db, p->azVar[i]);
}
sqlite3DbFree(db, p->azVar);
vdbeFreeOpArray(db, p->aOp, p->nOp);
sqlite3DbFree(db, p->aColName);
sqlite3DbFree(db, p->zSql);
sqlite3DbFree(db, p->pFree);
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
for(i=0; i<p->nScan; i++){
sqlite3DbFree(db, p->aScan[i].zName);
}
sqlite3DbFree(db, p->aScan);
#endif
}
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< > < | > > < |
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** VdbeDelete() also unlinks the Vdbe from the list of VMs associated with
** the database connection and frees the object itself.
*/
void sqlite3VdbeClearObject(sqlite3 *db, Vdbe *p){
SubProgram *pSub, *pNext;
int i;
assert( p->db==0 || p->db==db );
releaseMemArray(p->aColName, p->nResColumn*COLNAME_N);
for(pSub=p->pProgram; pSub; pSub=pNext){
pNext = pSub->pNext;
vdbeFreeOpArray(db, pSub->aOp, pSub->nOp);
sqlite3DbFree(db, pSub);
}
if( p->magic!=VDBE_MAGIC_INIT ){
releaseMemArray(p->aVar, p->nVar);
for(i=p->nzVar-1; i>=0; i--) sqlite3DbFree(db, p->azVar[i]);
sqlite3DbFree(db, p->azVar);
sqlite3DbFree(db, p->pFree);
}
vdbeFreeOpArray(db, p->aOp, p->nOp);
sqlite3DbFree(db, p->aColName);
sqlite3DbFree(db, p->zSql);
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
for(i=0; i<p->nScan; i++){
sqlite3DbFree(db, p->aScan[i].zName);
}
sqlite3DbFree(db, p->aScan);
#endif
}
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