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Re: Displaced stepping not always working as expected
On Wednesday 21 September 2011 16:39:06, Yao Qi wrote:
> On 09/21/2011 06:23 PM, Pedro Alves wrote:
> > On Wednesday 21 September 2011 07:08:43, Yao Qi wrote:
> >> The line of log looks strange to me. Why LWP 763 switch to itself?
> > This is non-stop mode, and fetch_inferior_event always prints the
> > "context switch":
> > if (non_stop
> > && ecs->ws.kind != TARGET_WAITKIND_IGNORE
> > && ecs->ws.kind != TARGET_WAITKIND_EXITED
> > && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED)
> > /* In non-stop mode, each thread is handled individually. Switch
> > early, so the global state is set correctly for this
> > thread. */
> > context_switch (ecs->ptid);
> I don't quite understand this piece of code and the comments here, but I
> think that debug log "context switch from Thread A to Thread A" is not
> useful, if not confusing.
I guess you'd have to back to a time where context_switch really did more
than just switching the thread. It used to swap a _bunch_ of globals
with the copies in the thread structure. It was horrible.
> How about this patch?