Re: [PATCH v3 3/7 UPDATE] perf tools: Add option for the path of buildid dsos under symfs

[Hekuang]

å 2016/5/16 10:50, David Ahern åé:
> On 5/15/16 7:30 PM, Hekuang wrote:
> > In previous patch, I use 'perf buildid-cache -a' to add vdso
> > binary into the HOST buildid dir.
>
> So 'perf buildid-cache' needs the symfs option?
With this patch 'PATCH v3 3/7 UPDATE', the tree of symfs dir is
like this:

âââ debug($(dso-prefix))
â   âââ .build-id
â   â   âââ 3a
â   â   â   âââ e5ba6d4e532ad529e43ccf1ce1ddf8a64a4fdd -> 
../../[kernel.kallsyms]/3ae5ba6d4e532ad529e43ccf1ce1ddf8a64a4fdd
â   â   âââ 84
â   â       âââ dbd75729adba57cc42f5544b25de571c0c8731 -> 
../../[vdso32]/84dbd75729adba57cc42f5544b25de571c0c8731
â   âââ [kernel.kallsyms]
â   â   âââ 3ae5ba6d4e532ad529e43ccf1ce1ddf8a64a4fdd
â   âââ [vdso]
â   â   âââ 84dbd75729adba57cc42f5544b25de571c0c8731
â   âââ [vdso32]
â       âââ 84dbd75729adba57cc42f5544b25de571c0c8731
âââ lib
â   âââ ld-2.22.so
â   âââ libc-2.22.so
âââ tmp
â   âââ hello
âââ xxx

So all binaries we need are included in the symfs dir. I think
this is consistent with your idea explained in previous mails.

With this symfs, we do not need buildid dir anymore and what's
your idea on 'perf buildid-cache' needs symfs option? after all,
that only effects on buildid dir.

Thanks.