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Overview
| Comment: | Fix the VDBE so that it always uses the original opcode for profiling and debugging even after the pOp pointer has been updated due to a jump. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
647495cf12b656f6a2f028dc1fb459d6 |
| User & Date: | drh 2015-04-16 17:31:02 |
Context
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2015-04-16
| ||
| 18:11 | Make sure all cursors are closed when returning from a VDBE subprogram that implements a foreign-key construct. (check-in: d04d354d user: drh tags: trunk) | |
| 17:31 | Fix the VDBE so that it always uses the original opcode for profiling and debugging even after the pOp pointer has been updated due to a jump. (check-in: 647495cf user: drh tags: trunk) | |
| 16:22 | Fix a faulty assert() in the compound-SELECT code generator. (check-in: 10715b05 user: drh tags: trunk) | |
Changes
Changes to src/vdbe.c.
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** This is the core of sqlite3_step().
*/
int sqlite3VdbeExec(
Vdbe *p /* The VDBE */
){
Op *aOp = p->aOp; /* Copy of p->aOp */
Op *pOp = aOp; /* Current operation */
int rc = SQLITE_OK; /* Value to return */
sqlite3 *db = p->db; /* The database */
u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
u8 encoding = ENC(db); /* The database encoding */
int iCompare = 0; /* Result of last OP_Compare operation */
unsigned nVmStep = 0; /* Number of virtual machine steps */
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
................................................................................
memAboutToChange(p, &aMem[pOp->p2]);
}
if( (pOp->opflags & OPFLG_OUT3)!=0 ){
assert( pOp->p3>0 );
assert( pOp->p3<=(p->nMem-p->nCursor) );
memAboutToChange(p, &aMem[pOp->p3]);
}
#endif
switch( pOp->opcode ){
/*****************************************************************************
** What follows is a massive switch statement where each case implements a
** separate instruction in the virtual machine. If we follow the usual
................................................................................
** restored.
*****************************************************************************/
}
#ifdef VDBE_PROFILE
{
u64 endTime = sqlite3Hwtime();
if( endTime>start ) pOp->cycles += endTime - start;
pOp->cnt++;
}
#endif
/* The following code adds nothing to the actual functionality
** of the program. It is only here for testing and debugging.
** On the other hand, it does burn CPU cycles every time through
** the evaluator loop. So we can leave it out when NDEBUG is defined.
*/
#ifndef NDEBUG
assert( pOp>=&aOp[-1] && pOp<&aOp[p->nOp] );
#ifdef SQLITE_DEBUG
if( db->flags & SQLITE_VdbeTrace ){
if( rc!=0 ) printf("rc=%d\n",rc);
if( pOp->opflags & (OPFLG_OUT2) ){
registerTrace(pOp->p2, &aMem[pOp->p2]);
}
if( pOp->opflags & OPFLG_OUT3 ){
registerTrace(pOp->p3, &aMem[pOp->p3]);
}
}
#endif /* SQLITE_DEBUG */
#endif /* NDEBUG */
} /* The end of the for(;;) loop the loops through opcodes */
/* If we reach this point, it means that execution is finished with
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** This is the core of sqlite3_step().
*/
int sqlite3VdbeExec(
Vdbe *p /* The VDBE */
){
Op *aOp = p->aOp; /* Copy of p->aOp */
Op *pOp = aOp; /* Current operation */
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
Op *pOrigOp; /* Value of pOp at the top of the loop */
#endif
int rc = SQLITE_OK; /* Value to return */
sqlite3 *db = p->db; /* The database */
u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
u8 encoding = ENC(db); /* The database encoding */
int iCompare = 0; /* Result of last OP_Compare operation */
unsigned nVmStep = 0; /* Number of virtual machine steps */
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
................................................................................
memAboutToChange(p, &aMem[pOp->p2]);
}
if( (pOp->opflags & OPFLG_OUT3)!=0 ){
assert( pOp->p3>0 );
assert( pOp->p3<=(p->nMem-p->nCursor) );
memAboutToChange(p, &aMem[pOp->p3]);
}
#endif
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
pOrigOp = pOp;
#endif
switch( pOp->opcode ){
/*****************************************************************************
** What follows is a massive switch statement where each case implements a
** separate instruction in the virtual machine. If we follow the usual
................................................................................
** restored.
*****************************************************************************/
}
#ifdef VDBE_PROFILE
{
u64 endTime = sqlite3Hwtime();
if( endTime>start ) pOrigOp->cycles += endTime - start;
pOrigOp->cnt++;
}
#endif
/* The following code adds nothing to the actual functionality
** of the program. It is only here for testing and debugging.
** On the other hand, it does burn CPU cycles every time through
** the evaluator loop. So we can leave it out when NDEBUG is defined.
*/
#ifndef NDEBUG
assert( pOp>=&aOp[-1] && pOp<&aOp[p->nOp-1] );
#ifdef SQLITE_DEBUG
if( db->flags & SQLITE_VdbeTrace ){
if( rc!=0 ) printf("rc=%d\n",rc);
if( pOrigOp->opflags & (OPFLG_OUT2) ){
registerTrace(pOrigOp->p2, &aMem[pOrigOp->p2]);
}
if( pOrigOp->opflags & OPFLG_OUT3 ){
registerTrace(pOrigOp->p3, &aMem[pOrigOp->p3]);
}
}
#endif /* SQLITE_DEBUG */
#endif /* NDEBUG */
} /* The end of the for(;;) loop the loops through opcodes */
/* If we reach this point, it means that execution is finished with
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