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Overview
| Comment: | Further refinement of the sqlite3VdbeMEmExpandBlob() fix of check-in [df58774e994bd] to prevent a reference to an unused variable - problem discovered by Valgrind. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: | 09435b5700a2650816ad9ffa628be5fa |
| User & Date: | drh 2019-04-10 13:24:35 |
Context
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2019-04-10
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| 18:29 | Update the list of OMIT options in the omittest.tcl script. check-in: f294cfc1 user: drh tags: trunk | |
| 13:24 | Further refinement of the sqlite3VdbeMEmExpandBlob() fix of check-in [df58774e994bd] to prevent a reference to an unused variable - problem discovered by Valgrind. check-in: 09435b57 user: drh tags: trunk | |
| 12:02 | Change the name of some internal testing interfaces to avoid a name conflict in AIX. check-in: c1cae7e7 user: drh tags: trunk | |
Changes
Changes to src/vdbemem.c.
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SQLITE_NOINLINE int sqlite3VdbeMemGrow(Mem *pMem, int n, int bPreserve){
assert( sqlite3VdbeCheckMemInvariants(pMem) );
assert( !sqlite3VdbeMemIsRowSet(pMem) );
testcase( pMem->db==0 );
/* If the bPreserve flag is set to true, then the memory cell must already
** contain a valid string or blob value. */
assert( bPreserve==0
|| pMem->flags&(MEM_Blob|MEM_Str)
|| MemNullNochng(pMem)
);
testcase( bPreserve && pMem->z==0 );
assert( pMem->szMalloc==0
|| pMem->szMalloc==sqlite3DbMallocSize(pMem->db, pMem->zMalloc) );
if( pMem->szMalloc>0 && bPreserve && pMem->z==pMem->zMalloc ){
pMem->z = pMem->zMalloc = sqlite3DbReallocOrFree(pMem->db, pMem->z, n);
bPreserve = 0;
................................................................................
testcase( sqlite3_value_nochange(pMem) );
assert( !sqlite3VdbeMemIsRowSet(pMem) );
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
/* Set nByte to the number of bytes required to store the expanded blob. */
nByte = pMem->n + pMem->u.nZero;
if( nByte<=0 ){
nByte = 1;
}
if( sqlite3VdbeMemGrow(pMem, nByte, 1) ){
return SQLITE_NOMEM_BKPT;
}
memset(&pMem->z[pMem->n], 0, pMem->u.nZero);
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SQLITE_NOINLINE int sqlite3VdbeMemGrow(Mem *pMem, int n, int bPreserve){
assert( sqlite3VdbeCheckMemInvariants(pMem) );
assert( !sqlite3VdbeMemIsRowSet(pMem) );
testcase( pMem->db==0 );
/* If the bPreserve flag is set to true, then the memory cell must already
** contain a valid string or blob value. */
assert( bPreserve==0 || pMem->flags&(MEM_Blob|MEM_Str) );
testcase( bPreserve && pMem->z==0 );
assert( pMem->szMalloc==0
|| pMem->szMalloc==sqlite3DbMallocSize(pMem->db, pMem->zMalloc) );
if( pMem->szMalloc>0 && bPreserve && pMem->z==pMem->zMalloc ){
pMem->z = pMem->zMalloc = sqlite3DbReallocOrFree(pMem->db, pMem->z, n);
bPreserve = 0;
................................................................................
testcase( sqlite3_value_nochange(pMem) );
assert( !sqlite3VdbeMemIsRowSet(pMem) );
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
/* Set nByte to the number of bytes required to store the expanded blob. */
nByte = pMem->n + pMem->u.nZero;
if( nByte<=0 ){
if( (pMem->flags & MEM_Blob)==0 ) return SQLITE_OK;
nByte = 1;
}
if( sqlite3VdbeMemGrow(pMem, nByte, 1) ){
return SQLITE_NOMEM_BKPT;
}
memset(&pMem->z[pMem->n], 0, pMem->u.nZero);
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