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Ensure that every pcache page always has either the PGHDR_DIRTY or the

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PGHDR_CLEAN bit set, even during transient page reshuffling during btree
balancing.

FossilOrigin-Name: e67f03c166277951725c194674c84da61c152a5820aa6df55a726f7dda838e92
This commit is contained in:
drh
2022-08-27 14:43:34 +00:00
parent 23593f8e99
commit f6e3e31625
4 changed files with 33 additions and 21 deletions
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14
manifest
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@@ -1,5 +1,5 @@
C Ensure\sthat\ssqlite3_prepare()\sinputs\salways\shave\sa\ssemicolon\sterminator\sin\nspeedtest1.
D 2022-08-25T19:29:35.476
C Ensure\sthat\severy\spcache\spage\salways\shas\seither\sthe\sPGHDR_DIRTY\sor\sthe\nPGHDR_CLEAN\sbit\sset,\seven\sduring\stransient\spage\sreshuffling\sduring\sbtree\nbalancing.
D 2022-08-27T14:43:34.272
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -528,7 +528,7 @@ F src/auth.c f4fa91b6a90bbc8e0d0f738aa284551739c9543a367071f55574681e0f24f8cf
F src/backup.c a2891172438e385fdbe97c11c9745676bec54f518d4447090af97189fd8e52d7
F src/bitvec.c 7c849aac407230278445cb069bebc5f89bf2ddd87c5ed9459b070a9175707b3d
F src/btmutex.c 6ffb0a22c19e2f9110be0964d0731d2ef1c67b5f7fabfbaeb7b9dabc4b7740ca
F src/btree.c 4a8d349b9ed4dc6d252c535227699d75319b633058a56432ebf43c9f56f9085e
F src/btree.c 971276350a2f5703da4ee9b333b0bb14d67e180b9775df6860e09ef4233c60a2
F src/btree.h 74d64b8f28cfa4a894d14d4ed64fa432cd697b98b61708d4351482ae15913e22
F src/btreeInt.h 8ce1332edd89dfd2461d561ac10a0ab5601c8e06200cb5230596c3caaf54482e
F src/build.c 898884afd67d953808cb687babc15b66a10213f99fe2ce7db98960e959881f98
@@ -578,7 +578,7 @@ F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
F src/pager.c c60031c483960660853dfecf14c8e830503baab1f638ac997f0144f1bd3e1781
F src/pager.h f82e9844166e1585f5786837ddc7709966138ced17f568c16af7ccf946c2baa3
F src/parse.y 8e67d820030d2655b9942ffe61c1e7e6b96cea2f2f72183533299393907d0564
F src/pcache.c 084e638432c610f95aea72b8509f0845d2791293f39d1b82f0c0a7e089c3bb6b
F src/pcache.c e82ef04f65c0d8c28648f79be10b5ed28f4c5e1b887e21364b09a290109bfdba
F src/pcache.h 4f87acd914cef5016fae3030343540d75f5b85a1877eed1a2a19b9f284248586
F src/pcache1.c 0b4245cd4964e635f2630908c2533cd8e9da7af3ca592e23ae8730aa25ae5eb9
F src/pragma.c b57a859a366472131194a9ad35cd76d5920577226b04c884b1b9085605faa280
@@ -1999,8 +1999,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P 1c87d7c58d5aec83f9e2ae3771a81aa17cfae0cf06169025a5db085e2d5749f9
R 03aae009b62262596bf019082ce9ceed
P c72756b0f2db30c622f00f43be9245d50e36049bd7740ee6332164f0c48f9c3d
R ec0ec294ce77eea8b112655cdb3d953c
U drh
Z 8bd158a0ccc4257762e239c65a25bd98
Z ddf747439ae76e336531030fc778367f
# Remove this line to create a well-formed Fossil manifest.

2
manifest.uuid
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@@ -1 +1 @@
c72756b0f2db30c622f00f43be9245d50e36049bd7740ee6332164f0c48f9c3d
e67f03c166277951725c194674c84da61c152a5820aa6df55a726f7dda838e92

3
src/btree.c
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@@ -8350,7 +8350,8 @@ static int balance_nonroot(
aPgOrder[iBest] = 0xffffffff;
if( iBest!=i ){
if( iBest>i ){
sqlite3PagerRekey(apNew[iBest]->pDbPage, pBt->nPage+iBest+1, 0);
sqlite3PagerRekey(apNew[iBest]->pDbPage, pBt->nPage+iBest+1,
aPgFlags[iBest]);
}
sqlite3PagerRekey(apNew[i]->pDbPage, pgno, aPgFlags[iBest]);
apNew[i]->pgno = pgno;

35
src/pcache.c
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@@ -66,12 +66,20 @@ struct PCache {
int sqlite3PcacheTrace = 2; /* 0: off 1: simple 2: cache dumps */
int sqlite3PcacheMxDump = 9999; /* Max cache entries for pcacheDump() */
# define pcacheTrace(X) if(sqlite3PcacheTrace){sqlite3DebugPrintf X;}
void pcacheDump(PCache *pCache){
int N;
int i, j;
sqlite3_pcache_page *pLower;
static void pcachePageTrace(int i, sqlite3_pcache_page *pLower){
PgHdr *pPg;
unsigned char *a;
int j;
pPg = (PgHdr*)pLower->pExtra;
printf("%3d: nRef %2d flgs %02x data ", i, pPg->nRef, pPg->flags);
a = (unsigned char *)pLower->pBuf;
for(j=0; j<12; j++) printf("%02x", a[j]);
printf(" ptr %p\n", pPg);
}
static void pcacheDump(PCache *pCache){
int N;
int i;
sqlite3_pcache_page *pLower;
if( sqlite3PcacheTrace<2 ) return;
if( pCache->pCache==0 ) return;
@@ -80,18 +88,15 @@ struct PCache {
for(i=1; i<=N; i++){
pLower = sqlite3GlobalConfig.pcache2.xFetch(pCache->pCache, i, 0);
if( pLower==0 ) continue;
pPg = (PgHdr*)pLower->pExtra;
printf("%3d: nRef %2d flgs %02x data ", i, pPg->nRef, pPg->flags);
a = (unsigned char *)pLower->pBuf;
for(j=0; j<12; j++) printf("%02x", a[j]);
printf("\n");
if( pPg->pPage==0 ){
pcachePageTrace(i, pLower);
if( ((PgHdr*)pLower)->pPage==0 ){
sqlite3GlobalConfig.pcache2.xUnpin(pCache->pCache, pLower, 0);
}
}
}
#else
#else
# define pcacheTrace(X)
# define pcachePageTrace(PGNO, X)
# define pcacheDump(X)
#endif
@@ -115,6 +120,11 @@ int sqlite3PcachePageSanity(PgHdr *pPg){
assert( (pPg->flags & PGHDR_DIRTY)==0 );/* Cannot be both CLEAN and DIRTY */
assert( pCache->pDirty!=pPg ); /* CLEAN pages not on dirty list */
assert( pCache->pDirtyTail!=pPg );
}else{
assert( (pPg->flags & PGHDR_DIRTY)!=0 );/* If not CLEAN must be DIRTY */
assert( pPg->pDirtyNext==0 || pPg->pDirtyNext->pDirtyPrev==pPg );
assert( pPg->pDirtyPrev==0 || pPg->pDirtyPrev->pDirtyNext==pPg );
assert( pPg->pDirtyPrev!=0 || pCache->pDirty==pPg );
}
/* WRITEABLE pages must also be DIRTY */
if( pPg->flags & PGHDR_WRITEABLE ){
@@ -388,8 +398,9 @@ sqlite3_pcache_page *sqlite3PcacheFetch(
assert( createFlag==0 || pCache->eCreate==eCreate );
assert( createFlag==0 || eCreate==1+(!pCache->bPurgeable||!pCache->pDirty) );
pRes = sqlite3GlobalConfig.pcache2.xFetch(pCache->pCache, pgno, eCreate);
pcacheTrace(("%p.FETCH %d%s (result: %p)\n",pCache,pgno,
pcacheTrace(("%p.FETCH %d%s (result: %p) ",pCache,pgno,
createFlag?" create":"",pRes));
pcachePageTrace(pgno, pRes);
return pRes;
}