goinsane wrote: > Hi, > > I'd like to know if D enables to save and recall values of the same thread in > a way like self->... does. > > Let's say a thread fires syscall::open:entry two times and gets 2 > filedescriptors. How could I save those in syscall::open:return for later > reuse? > The use of just 1 variable (e.g.self->fd) only would overwrite the value at > the 2nd call. Maybe an associative array would tend to a solution, like > self->fd[port] = ... ?
Yep; that's how you'd do it. Note that this might not work quite the way you want for multi-threaded programs that use the same fd in more than one thread. To handle that case (which is a superset of the case you're looking at), I think you'd need a global array indexed on pid and fd, because fds are allocated to a process, not a thread, and D doesn't seem to have a per-process storage mechanism. > And how could I evaluate them in a predicate of another probe? self->fd[port] -- where "port" needs to be the fd. Depending on the definition of the probe and the way you write your code, "port" might be argv0, or it might be self->port, or perhaps something else. -- James Carlson 42.703N 71.076W <carls...@workingcode.com> _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
