database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-12 13:01:09 +03:00
Code Activity

Additional debugging and tracing logic for pcache.c, turned off by default

Browse Source 
using an "#if 0".

FossilOrigin-Name: 32a62e3bd46cf58586617d3f8b1a971c91df205e
This commit is contained in:
drh
2016-05-13 04:24:25 +00:00
parent 5f65ff277d
commit 7aeb216a19
3 changed files with 39 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/pcache.c
View File

@@ -57,10 +57,35 @@ struct PCache {
** Debug tracing macros
*/
#if defined(SQLITE_DEBUG) && 0
int sqlite3PcacheTrace = 1;
int sqlite3PcacheTrace = 2;
# define pcacheTrace(X) if(sqlite3PcacheTrace){sqlite3DebugPrintf X;}
#else
void pcacheDump(PCache *pCache){
int N;
int i, j;
sqlite3_pcache_page *pLower;
PgHdr *pPg;
unsigned char *a;
if( sqlite3PcacheTrace<2 ) return;
if( pCache->pCache==0 ) return;
N = sqlite3PcachePagecount(pCache);
if( N>5 ) N = 5;
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 ){
sqlite3GlobalConfig.pcache2.xUnpin(pCache->pCache, pLower, 0);
}
}
}
#else
# define pcacheTrace(X)
# define pcacheDump(X)
#endif
/********************************** Linked List Management ********************/
@@ -142,6 +167,7 @@ static void pcacheManageDirtyList(PgHdr *pPage, u8 addRemove){
p->pSynced = pPage;
}
}
pcacheDump(p);
}
/*
@@ -152,6 +178,7 @@ static void pcacheUnpin(PgHdr *p){
if( p->pCache->bPurgeable ){
pcacheTrace(("%p.UNPIN %d\n", p->pCache, p->pgno));
sqlite3GlobalConfig.pcache2.xUnpin(p->pCache->pCache, p->pPage, 0);
pcacheDump(p->pCache);
}
}
@@ -352,6 +379,7 @@ int sqlite3PcacheFetchStress(
#endif
pcacheTrace(("%p.SPILL %d\n",pCache,pPg->pgno));
rc = pCache->xStress(pCache->pStress, pPg);
pcacheDump(pCache);
if( rc!=SQLITE_OK && rc!=SQLITE_BUSY ){
return rc;
}
@@ -496,6 +524,7 @@ void sqlite3PcacheMakeClean(PgHdr *p){
*/
void sqlite3PcacheCleanAll(PCache *pCache){
PgHdr *p;
pcacheTrace(("%p.CLEAN-ALL\n",pCache));
while( (p = pCache->pDirty)!=0 ){
sqlite3PcacheMakeClean(p);
}
@@ -506,6 +535,7 @@ void sqlite3PcacheCleanAll(PCache *pCache){
*/
void sqlite3PcacheClearWritable(PCache *pCache){
PgHdr *p;
pcacheTrace(("%p.CLEAR-WRITEABLE\n",pCache));
for(p=pCache->pDirty; p; p=p->pDirtyNext){
p->flags &= ~(PGHDR_NEED_SYNC|PGHDR_WRITEABLE);
}