Re: [PATCH v5] tools lib traceevent: str addresses in heterogeneous arch environments
From: Arnaldo Carvalho de Melo
Date: Tue Sep 22 2015 - 10:04:51 EST
Em Tue, Sep 22, 2015 at 09:46:18AM -0400, Steven Rostedt escreveu:
> On Tue, 22 Sep 2015 14:22:03 +0100
> Kapileshwar Singh <kapileshwar.singh@xxxxxxx> wrote:
>
> > if (!(field->flags & FIELD_IS_ARRAY) &&
> > field->size == pevent->long_size) {
> > - addr = *(unsigned long *)(data + field->offset);
> > +
> > + /* Handle heterogeneous recording and processing
> > + * architectures
> > + *
> > + * CASE I:
> > + * Traces recorded on 32-bit devices (32-bit
> > + * addressing) and processed on 64-bit devices:
> > + * In this case, only 32 bits should be read.
> > + *
> > + * CASE II:
> > + * Traces recorded on 64 bit devices and processed
> > + * on 32-bit devices:
> > + * In this case, 64 bits must be read.
>
> Probably should have added a comment about not caring about endianess
> and why, but that can be added later. This patch is good enough for now.
>
> Reviewed-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
>
> Arnaldo, want to pick this up?
Sure, I'm adding it to perf/core, i.e. for 4.4, or do you think this
needs to go into 4.3?
- Arnaldo
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