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Overview
| Comment: | Add extra code to log details when corruption is detected in the pointer-map structure maintained by the b-tree layer in begin-concurrent transactions. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | begin-concurrent-pnu |
| Files: | files | file ages | folders |
| SHA3-256: |
570233716032f258b878d52c4d5a47e0 |
| User & Date: | dan 2018-02-20 21:00:45 |
Context
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2018-12-03
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| 19:29 | Cherrypick a couple of fixes from begin-concurrent-pnu into this branch. The differences between the two branches are now that this one does not have "PRAGMA noop_update" or the mutex-free PRNG. check-in: a56506b9 user: dan tags: begin-concurrent | |
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2018-03-02
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| 18:26 | Merge latest changes from begin-concurrent into this branch. check-in: 8ade94ba user: dan tags: begin-concurrent-pnu | |
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2018-02-20
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| 21:00 | Add extra code to log details when corruption is detected in the pointer-map structure maintained by the b-tree layer in begin-concurrent transactions. check-in: 57023371 user: dan tags: begin-concurrent-pnu | |
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2018-01-04
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| 18:36 | Fix problem causing free-list corruption when merging free-lists for two concurrent transactions that have both used page X as an in-memory free-list trunk page, where X lies past the end of the initial database images. check-in: dc0fc2aa user: dan tags: begin-concurrent-pnu | |
Changes
Changes to src/btree.c.
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sqlite3_free(pMap->aRollback);
sqlite3_free(pMap->aPtr);
sqlite3_free(pMap->aSvpt);
sqlite3_free(pMap);
pBt->pMap = 0;
}
}
#else /* SQLITE_OMIT_CONCURRENT */
# define btreePtrmapAllocate(x) SQLITE_OK
# define btreePtrmapDelete(x)
# define btreePtrmapBegin(x,y) SQLITE_OK
# define btreePtrmapEnd(x,y,z)
#endif /* SQLITE_OMIT_CONCURRENT */
static void releasePage(MemPage *pPage); /* Forward reference */
static void releasePageOne(MemPage *pPage); /* Forward reference */
static void releasePageNotNull(MemPage *pPage); /* Forward reference */
/*
................................................................................
if( rc==SQLITE_OK ){
Pgno nHPage = get4byte(&p1[28]);
Pgno nFin = nHPage; /* Size of db after transaction merge */
if( sqlite3PagerIswriteable(pPage1->pDbPage) ){
Pgno iHTrunk = get4byte(&p1[32]);
u32 nHFree = get4byte(&p1[36]);
/* Attach the head database free list to the end of the current
** transactions free-list (if any). */
if( iTrunk!=0 ){
put4byte(&p1[36], nHFree + nFree);
put4byte(&p1[32], iTrunk);
while( iTrunk ){
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sqlite3_free(pMap->aRollback);
sqlite3_free(pMap->aPtr);
sqlite3_free(pMap->aSvpt);
sqlite3_free(pMap);
pBt->pMap = 0;
}
}
/*
** Check that the pointer-map does not contain any entries with a parent
** page of 0. Call sqlite3_log() multiple times to output the entire
** data structure if it does.
*/
static void btreePtrmapCheck(BtShared *pBt, Pgno nPage){
Pgno i;
int bProblem = 0;
BtreePtrmap *p = pBt->pMap;
for(i=p->iFirst; i<=nPage; i++){
PtrmapEntry *pEntry = &p->aPtr[i-p->iFirst];
if( pEntry->eType==PTRMAP_OVERFLOW1
|| pEntry->eType==PTRMAP_OVERFLOW2
|| pEntry->eType==PTRMAP_BTREE
){
if( pEntry->parent==0 ){
bProblem = 1;
break;
}
}
}
if( bProblem ){
for(i=p->iFirst; i<=nPage; i++){
PtrmapEntry *pEntry = &p->aPtr[i-p->iFirst];
sqlite3_log(SQLITE_CORRUPT,
"btreePtrmapCheck: pgno=%d eType=%d parent=%d",
(int)i, (int)pEntry->eType, (int)pEntry->parent
);
}
abort();
}
}
#else /* SQLITE_OMIT_CONCURRENT */
# define btreePtrmapAllocate(x) SQLITE_OK
# define btreePtrmapDelete(x)
# define btreePtrmapBegin(x,y) SQLITE_OK
# define btreePtrmapEnd(x,y,z)
# define btreePtrmapCheck(y,z)
#endif /* SQLITE_OMIT_CONCURRENT */
static void releasePage(MemPage *pPage); /* Forward reference */
static void releasePageOne(MemPage *pPage); /* Forward reference */
static void releasePageNotNull(MemPage *pPage); /* Forward reference */
/*
................................................................................
if( rc==SQLITE_OK ){
Pgno nHPage = get4byte(&p1[28]);
Pgno nFin = nHPage; /* Size of db after transaction merge */
if( sqlite3PagerIswriteable(pPage1->pDbPage) ){
Pgno iHTrunk = get4byte(&p1[32]);
u32 nHFree = get4byte(&p1[36]);
btreePtrmapCheck(pBt, nPage);
/* Attach the head database free list to the end of the current
** transactions free-list (if any). */
if( iTrunk!=0 ){
put4byte(&p1[36], nHFree + nFree);
put4byte(&p1[32], iTrunk);
while( iTrunk ){
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