Messages in this thread Patch in this message | | | Date | Mon, 27 Oct 2014 21:24:57 +0900 | From | Masami Hiramatsu <> | Subject | Re: [PATCH v7 1/2] kprobes: copy ainsn after alloc aggr kprobe |
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(2014/10/25 15:51), Wang Nan wrote: > Copy old kprobe to newly alloced optimized_kprobe before > arch_prepare_optimized_kprobe(). Original kprove can brings more > information to optimizer.
Hmm, yes, but this also call copy_kprobe twice in try_to_optimize_kprobe(). If you really need the original kprobe information, I think you'd better change the arch_prepare_optimized_kprobe as below;
/* Pass both of new optprobe and original kprobe */ arch_prepare_optimized_kprobe(op, p);
Thank you,
> > v1 -> v2: > - Bugfix: copy p->addr when alloc_aggr_kprobe. > > Signed-off-by: Wang Nan <wangnan0@huawei.com> > --- > kernel/kprobes.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/kernel/kprobes.c b/kernel/kprobes.c > index 3995f54..e9868ec 100644 > --- a/kernel/kprobes.c > +++ b/kernel/kprobes.c > @@ -730,7 +730,13 @@ static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) > return NULL; > > INIT_LIST_HEAD(&op->list); > + > + /* > + * copy gives arch_prepare_optimized_kprobe > + * more information > + */ > op->kp.addr = p->addr; > + copy_kprobe(p, &op->kp); > arch_prepare_optimized_kprobe(op); > > return &op->kp; >
-- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Research Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com
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