Jim,
thanks a lot for your suggestions! I just came up with a different solution a
few minutes ago, here it is:
as the filesystem IO read and writes are always embedded in opens and closes,
and I know the name of the UNIX domain socket, I can match against that in
open:entry:
syscall::open*:entry
/(((OPT_command || OPT_pid) && pid == $target) || (OPT_name && execname ==
NAME)) && copyinstr(arg0) != "/path/to/socket"/
{
/* set start details */
self->start = timestamp;
self->vstart = vtimestamp;
}
Then in open:return I can grab the fd:
syscall::*open*:return
/self->start/
{
/* save fd number */
self->fd = arg0;
/* calculate elapsed time */
....
}
In read:entry/return I can now test if the read/write is on the fd of the last
open:
syscall::*read*:entry,
syscall::*write*:entry
/((OPT_command || OPT_pid) && pid == $target) || (OPT_name && execname == NAME)/
{
self->fd = self->fd == arg0 ? arg0 : 0;
/* set start details */
self->start = timestamp;
self->vstart = vtimestamp;
}
/*
* filesystem IO
*/
syscall::*read*:return,
syscall::*write*:return
/self->start && self->fd/
{
/* calculate elapsed time */
....
}
/*
* socket IO
*/
syscall::*read*:return,
syscall::*write*:return
/self->start && self->fd == 0/
{
/* calculate elapsed time */
....
}
--
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