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Add NEVER macros to error-detection branches that were made unreachable

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(as far as I can tell) by check-in [ceacc28b03580334].

FossilOrigin-Name: 7b62555e285f32d354df7746ef8dce16856c6d9d53a02d895b74ba02362d2968
This commit is contained in:
drh
2020-01-03 17:40:30 +00:00
parent 0d21eae099
commit 3b76c45a7f
3 changed files with 22 additions and 20 deletions
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28
src/btree.c
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@@ -1449,7 +1449,7 @@ static int defragmentPage(MemPage *pPage, int nMaxFrag){
int sz2 = 0;
int sz = get2byte(&data[iFree+2]);
int top = get2byte(&data[hdr+5]);
if( top>=iFree ){
if( NEVER(top>=iFree) ){
return SQLITE_CORRUPT_PAGE(pPage);
}
if( iFree2 ){
@@ -1458,7 +1458,7 @@ static int defragmentPage(MemPage *pPage, int nMaxFrag){
if( iFree2+sz2 > usableSize ) return SQLITE_CORRUPT_PAGE(pPage);
memmove(&data[iFree+sz+sz2], &data[iFree+sz], iFree2-(iFree+sz));
sz += sz2;
}else if( iFree+sz>usableSize ){
}else if( NEVER(iFree+sz>usableSize) ){
return SQLITE_CORRUPT_PAGE(pPage);
}
@@ -1650,8 +1650,10 @@ static int allocateSpace(MemPage *pPage, int nByte, int *pIdx){
if( (data[hdr+2] || data[hdr+1]) && gap+2<=top ){
u8 *pSpace = pageFindSlot(pPage, nByte, &rc);
if( pSpace ){
int g2;
assert( pSpace+nByte<=data+pPage->pBt->usableSize );
if( (*pIdx = (int)(pSpace-data))<=gap ){
*pIdx = g2 = (int)(pSpace-data);
if( NEVER(g2<=gap) ){
return SQLITE_CORRUPT_PAGE(pPage);
}else{
return SQLITE_OK;
@@ -1729,12 +1731,12 @@ static int freeSpace(MemPage *pPage, u16 iStart, u16 iSize){
}else{
while( (iFreeBlk = get2byte(&data[iPtr]))<iStart ){
if( iFreeBlk<iPtr+4 ){
if( iFreeBlk==0 ) break;
if( ALWAYS(iFreeBlk==0) ) break;
return SQLITE_CORRUPT_PAGE(pPage);
}
iPtr = iFreeBlk;
}
if( iFreeBlk>pPage->pBt->usableSize-4 ){
if( NEVER(iFreeBlk>pPage->pBt->usableSize-4) ){
return SQLITE_CORRUPT_PAGE(pPage);
}
assert( iFreeBlk>iPtr || iFreeBlk==0 );
@@ -1749,7 +1751,7 @@ static int freeSpace(MemPage *pPage, u16 iStart, u16 iSize){
nFrag = iFreeBlk - iEnd;
if( iEnd>iFreeBlk ) return SQLITE_CORRUPT_PAGE(pPage);
iEnd = iFreeBlk + get2byte(&data[iFreeBlk+2]);
if( iEnd > pPage->pBt->usableSize ){
if( NEVER(iEnd > pPage->pBt->usableSize) ){
return SQLITE_CORRUPT_PAGE(pPage);
}
iSize = iEnd - iStart;
@@ -1777,7 +1779,8 @@ static int freeSpace(MemPage *pPage, u16 iStart, u16 iSize){
/* The new freeblock is at the beginning of the cell content area,
** so just extend the cell content area rather than create another
** freelist entry */
if( iStart<x || iPtr!=hdr+1 ) return SQLITE_CORRUPT_PAGE(pPage);
if( iStart<x ) return SQLITE_CORRUPT_PAGE(pPage);
if( NEVER(iPtr!=hdr+1) ) return SQLITE_CORRUPT_PAGE(pPage);
put2byte(&data[hdr+1], iFreeBlk);
put2byte(&data[hdr+5], iEnd);
}else{
@@ -6936,7 +6939,7 @@ static int rebuildPage(
assert( i<iEnd );
j = get2byte(&aData[hdr+5]);
if( j>(u32)usableSize ){ j = 0; }
if( NEVER(j>(u32)usableSize) ){ j = 0; }
memcpy(&pTmp[j], &aData[j], usableSize - j);
for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
@@ -6948,7 +6951,7 @@ static int rebuildPage(
u16 sz = pCArray->szCell[i];
assert( sz>0 );
if( SQLITE_WITHIN(pCell,aData,pEnd) ){
if( ((uptr)(pCell+sz))>(uptr)pEnd ) return SQLITE_CORRUPT_BKPT;
if( NEVER(((uptr)(pCell+sz))>(uptr)pEnd) ) return SQLITE_CORRUPT_BKPT;
pCell = &pTmp[pCell - aData];
}else if( (uptr)(pCell+sz)>(uptr)pSrcEnd
&& (uptr)(pCell)<(uptr)pSrcEnd
@@ -6959,10 +6962,9 @@ static int rebuildPage(
pData -= sz;
put2byte(pCellptr, (pData - aData));
pCellptr += 2;
if( pData < pCellptr ) return SQLITE_CORRUPT_BKPT;
if( NEVER(pData < pCellptr) ) return SQLITE_CORRUPT_BKPT;
memcpy(pData, pCell, sz);
assert( sz==pPg->xCellSize(pPg, pCell) || CORRUPT_DB );
testcase( sz!=pPg->xCellSize(pPg,pCell) );
assert( sz==pPg->xCellSize(pPg, pCell) );
i++;
if( i>=iEnd ) break;
if( pCArray->ixNx[k]<=i ){
@@ -7101,7 +7103,7 @@ static int pageFreeArray(
}
pFree = pCell;
szFree = sz;
if( pFree+sz>pEnd ) return 0;
if( NEVER(pFree+sz>pEnd) ) return 0;
}else{
pFree = pCell;
szFree += sz;