database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-07-29 08:01:23 +03:00
Code Activity

Further enhance the vfslog extension to record the number of freelist pages

Browse Source 
and the first freelist page in CHNGCTR-READ and CHNGCTR-WRITE records.

FossilOrigin-Name: 08157524ca816a81f3c341097e23982727eaa125
This commit is contained in:
drh
2013-10-18 17:42:35 +00:00
parent 2eebbf699e
commit 06d6efb661
3 changed files with 34 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
ext/misc/vfslog.c
View File

@ -346,6 +346,13 @@ static void vlogSignature(unsigned char *p, int n, char *zCksum){
}
}
/*
** Convert a big-endian 32-bit integer into a native integer
*/
static int bigToNative(const unsigned char *x){
return (x[0]<<24) + (x[1]<<16) + (x[2]<<8) + x[3];
}
/*
** Read data from an vlog-file.
*/
@ -376,9 +383,16 @@ static int vlogRead(
&& iOfst+iAmt>=28
){
unsigned char *x = ((unsigned char*)zBuf)+(24-iOfst);
unsigned iCtr;
iCtr = (x[0]<<24) + (x[1]<<16) + (x[2]<<8) + x[3];
vlogLogPrint(p->pLog, tStart, 0, "CHNGCTR-READ", iCtr, -1, 0, 0);
unsigned iCtr, nFree = -1;
char *zFree = 0;
char zStr[12];
iCtr = bigToNative(x);
if( iOfst+iAmt>=40 ){
zFree = zStr;
sqlite3_snprintf(sizeof(zStr), zStr, "%d", bigToNative(x+8));
nFree = bigToNative(x+12);
}
vlogLogPrint(p->pLog, tStart, 0, "CHNGCTR-READ", iCtr, nFree, zFree, 0);
}
return rc;
}
@ -409,9 +423,16 @@ static int vlogWrite(
&& iOfst+iAmt>=28
){
unsigned char *x = ((unsigned char*)z)+(24-iOfst);
unsigned iCtr;
iCtr = (x[0]<<24) + (x[1]<<16) + (x[2]<<8) + x[3];
vlogLogPrint(p->pLog, tStart, 0, "CHNGCTR-WRITE", iCtr, -1, 0, 0);
unsigned iCtr, nFree = -1;
char *zFree = 0;
char zStr[12];
iCtr = bigToNative(x);
if( iOfst+iAmt>=40 ){
zFree = zStr;
sqlite3_snprintf(sizeof(zStr), zStr, "%d", bigToNative(x+8));
nFree = bigToNative(x+12);
}
vlogLogPrint(p->pLog, tStart, 0, "CHNGCTR-WRITE", iCtr, nFree, zFree, 0);
}
return rc;
}