linux-kernel - Re: [PATCH 03/10] perf, tools: Use al.addr to set up call chain

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Date:	Thu, 11 Dec 2014 14:27:02 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	namhyung@...nel.org
Subject: Re: [PATCH 03/10] perf, tools: Use al.addr to set up call chain

> this patch also changed the output of callchain entries
> with 'map' but with no symbol, like in following diff:

Was unintentional. Patch looks good. thanks.

-Andi
> 
> ---
>                   ---get_next_seq
>                      |
> -                    |--70.16%-- 0x40e1cf
> +                    |--70.16%-- 0xe1cf
>                      |          0x841f0f
>                      |
> -                    |--25.83%-- 0x40e153
> +                    |--25.83%-- 0xe153
>                      |          0x841f0f
>                      |
> -                     --4.00%-- 0x40e27f
> +                     --4.00%-- 0xe27f
> --
> 
> I'm guessing this change was unintentional..? in case we have a map
> but no symbol seeing full address is more clear than relative at
> least for binary, not sure about DSOs..
> 
> thoughts?
> 
> thanks,
> jirka
> 
> 
> ---
> diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
> index 64b377e591e4..a4fb25fb26f5 100644
> --- a/tools/perf/util/callchain.c
> +++ b/tools/perf/util/callchain.c
> @@ -816,22 +816,30 @@ out:
>  char *callchain_list__sym_name(struct callchain_list *cl,
>  			       char *bf, size_t bfsize, bool show_dso)
>  {
> +	struct map *map = cl->ms.map;
>  	int printed;
>  
>  	if (cl->ms.sym) {
>  		if (callchain_param.key == CCKEY_ADDRESS &&
> -		    cl->ms.map && !cl->srcline)
> -			cl->srcline = get_srcline(cl->ms.map->dso,
> -						  map__rip_2objdump(cl->ms.map,
> -								    cl->ip),
> +		    map && !cl->srcline) {
> +			cl->srcline = get_srcline(map->dso,
> +						  map__rip_2objdump(map, cl->ip),
>  						  cl->ms.sym, false);
> +		}
>  		if (cl->srcline)
>  			printed = scnprintf(bf, bfsize, "%s %s",
>  					cl->ms.sym->name, cl->srcline);
>  		else
>  			printed = scnprintf(bf, bfsize, "%s", cl->ms.sym->name);
> -	} else
> -		printed = scnprintf(bf, bfsize, "%#" PRIx64, cl->ip);
> +	} else {
> +		/*
> +		 * The cl->ip value is unbased ip (applied map->map_ip).
> +		 * Display the unmap ip in case we have no symbol.
> +		 */
> +		u64 addr = map ? map->unmap_ip(map, cl->ip) : cl->ip;
> +
> +		printed = scnprintf(bf, bfsize, "%#" PRIx64, addr);
> +	}
>  
>  	if (show_dso)
>  		scnprintf(bf + printed, bfsize - printed, " %s",
> 

-- 
ak@...ux.intel.com -- Speaking for myself only
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