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Merge all trunk changes since 3.8.1 into the sessions branch.

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FossilOrigin-Name: aa72ea8a004de7fe744fc13baef19d05aea607d5
This commit is contained in:
drh
2013-10-28 22:47:24 +00:00
parent d82d4750a8 7afc8b0c3f
commit d63d4b7bd7
14 changed files with 563 additions and 86 deletions
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91
ext/misc/vfslog.c
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@ -16,14 +16,37 @@
/*
** This module contains code for a wrapper VFS that causes a log of
** most VFS calls to be written into a file on disk. The log
** is stored as comma-separated variables.
** most VFS calls to be written into a file on disk.
**
** All calls on sqlite3_file objects are logged.
** Additionally, calls to the xAccess(), xOpen(), and xDelete()
** methods are logged. The other sqlite3_vfs object methods (xDlXXX,
** xRandomness, xSleep, xCurrentTime, xGetLastError and xCurrentTimeInt64)
** are not logged.
** Each database connection creates a separate log file in the same
** directory as the original database and named after the original
** database. A unique suffix is added to avoid name collisions.
** Separate log files are used so that concurrent processes do not
** try to write log operations to the same file at the same instant,
** resulting in overwritten or comingled log text.
**
** Each individual log file records operations by a single database
** connection on both the original database and its associated rollback
** journal.
**
** The log files are in the comma-separated-value (CSV) format. The
** log files can be imported into an SQLite database using the ".import"
** command of the SQLite command-line shell for analysis.
**
** One technique for using this module is to append the text of this
** module to the end of a standard "sqlite3.c" amalgamation file then
** add the following compile-time options:
**
** -DSQLITE_EXTRA_INIT=sqlite3_register_vfslog
** -DSQLITE_USE_FCNTL_TRACE
**
** The first compile-time option causes the sqlite3_register_vfslog()
** function, defined below, to be invoked when SQLite is initialized.
** That causes this custom VFS to become the default VFS for all
** subsequent connections. The SQLITE_USE_FCNTL_TRACE option causes
** the SQLite core to issue extra sqlite3_file_control() operations
** with SQLITE_FCNTL_TRACE to give some indication of what is going
** on in the core.
*/
#include "sqlite3.h"
@ -190,7 +213,7 @@ static void vlogLogPrint(
const char *zArg3, /* Third argument */
int iRes /* Result */
){
char z1[40], z2[40], z3[70];
char z1[40], z2[40], z3[2000];
if( pLog==0 ) return;
if( iArg1>=0 ){
sqlite3_snprintf(sizeof(z1), z1, "%lld", iArg1);
@ -203,7 +226,7 @@ static void vlogLogPrint(
z2[0] = 0;
}
if( zArg3 ){
sqlite3_snprintf(sizeof(z3), z3, "\"%s\"", zArg3);
sqlite3_snprintf(sizeof(z3), z3, "\"%.*w\"", sizeof(z3)-4, zArg3);
}else{
z3[0] = 0;
}
@ -346,6 +369,13 @@ 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 +406,16 @@ 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 +446,16 @@ 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;
}
@ -477,12 +521,11 @@ static int vlogLock(sqlite3_file *pFile, int eLock){
*/
static int vlogUnlock(sqlite3_file *pFile, int eLock){
int rc;
sqlite3_uint64 tStart, tElapse;
sqlite3_uint64 tStart;
VLogFile *p = (VLogFile *)pFile;
tStart = vlog_time();
vlogLogPrint(p->pLog, tStart, 0, "UNLOCK", eLock, -1, 0, 0);
rc = p->pReal->pMethods->xUnlock(p->pReal, eLock);
tElapse = vlog_time() - tStart;
vlogLogPrint(p->pLog, tStart, tElapse, "UNLOCK", eLock, -1, 0, rc);
return rc;
}
@ -514,7 +557,17 @@ static int vlogFileControl(sqlite3_file *pFile, int op, void *pArg){
*(char**)pArg = sqlite3_mprintf("vlog/%z", *(char**)pArg);
}
tElapse = vlog_time() - tStart;
vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, -1, 0, rc);
if( op==SQLITE_FCNTL_TRACE ){
vlogLogPrint(p->pLog, tStart, tElapse, "TRACE", op, -1, pArg, rc);
}else if( op==SQLITE_FCNTL_PRAGMA ){
const char **azArg = (const char **)pArg;
vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, -1, azArg[1], rc);
}else if( op==SQLITE_FCNTL_SIZE_HINT ){
sqlite3_int64 sz = *(sqlite3_int64*)pArg;
vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, sz, 0, rc);
}else{
vlogLogPrint(p->pLog, tStart, tElapse, "FILECONTROL", op, -1, 0, rc);
}
return rc;
}