linux-kernel - Re: [PATCH 5/8] perf tools: Promote proper messages for cross-platform unwind

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Date:	Sat, 7 May 2016 20:42:40 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	alexander.shishkin@...ux.intel.com, wangnan0@...wei.com,
	jpoimboe@...hat.com, ak@...ux.intel.com, eranian@...gle.com,
	namhyung@...nel.org, adrian.hunter@...el.com,
	sukadev@...ux.vnet.ibm.com, masami.hiramatsu.pt@...achi.com,
	tumanova@...ux.vnet.ibm.com, kan.liang@...el.com,
	penberg@...nel.org, dsahern@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/8] perf tools: Promote proper messages for
 cross-platform unwind

On Fri, May 06, 2016 at 08:59:11AM +0000, He Kuang wrote:

SNIP

> +	if (machine)
> +		root_dir = machine->root_dir;
> +
> +	name = malloc(PATH_MAX);
> +	if (!name)
> +		return -1;
> +
> +	kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
> +		dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
> +		dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE ||
> +		dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
> +
> +	/*
> +	 * Iterate over candidate debug images.
> +	 * Keep track of "interesting" ones (those which have a symtab, dynsym,
> +	 * and/or opd section) for processing.
> +	 */
> +	for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
> +		enum dso_binary_type symtab_type = binary_type_symtab[i];
> +
> +		if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
> +			continue;
> +
> +		if (dso__read_binary_type_filename(dso, symtab_type,
> +						   root_dir, name, PATH_MAX))
> +			continue;
> +
> +		if (!is_regular_file(name))
> +			continue;
> +
> +		return elf_is_64_bit(name);
> +	}
> +
> +	return -1;
> +}
> +
>  int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
>  {
>  	char *name;
> diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
> index 4e6910e..d33fbf4 100644
> --- a/tools/perf/util/symbol.h
> +++ b/tools/perf/util/symbol.h
> @@ -308,6 +308,8 @@ int setup_list(struct strlist **list, const char *list_str,
>  	       const char *list_name);
>  int setup_intlist(struct intlist **list, const char *list_str,
>  		  const char *list_name);
> +int elf_is_64_bit(char *name);
> +int dso_is_64_bit(struct dso *dso, struct map *map);

please put above 2 functions addition into separate patch

thanks,
jirka