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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Jiri Olsa <jolsa@kernel.org>
Cc: Krister Johansen <kjlx@templeofstupid.com>,
	lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH] perf tools: Restore proper cwd on return from mnt ns
Date: Mon, 19 Nov 2018 08:10:06 -0800	[thread overview]
Message-ID: <20181119161006.GA13850@kernel.org> (raw)
In-Reply-To: <20181101170001.30019-1-jolsa@kernel.org>

Em Thu, Nov 01, 2018 at 06:00:01PM +0100, Jiri Olsa escreveu:
> Adding the current working directory to be part of the cookie
> and restoring it in the nsinfo__mountns_exit call.
 
> diff --git a/tools/perf/util/namespaces.c b/tools/perf/util/namespaces.c
> index cf8bd123cf73..fb0458b7e6aa 100644
> --- a/tools/perf/util/namespaces.c
> +++ b/tools/perf/util/namespaces.c

> @@ -199,9 +201,13 @@ void nsinfo__mountns_enter(struct nsinfo *nsi,
>  	if (snprintf(curpath, PATH_MAX, "/proc/self/ns/mnt") >= PATH_MAX)
>  		return;
  
> +	oldcwd = get_current_dir_name();

Breaks the build with bionic (Android), where get_current_dir_name() is
not available:

/tmp/build/perf/libperf.a(libperf-in.o):hist.c:function nsinfo__mountns_enter: error: undefined reference to 'get_current_dir_name'
collect2: error: ld returned 1 exit status
Makefile.perf:534: recipe for target '/tmp/build/perf/perf' failed
make[2]: *** [/tmp/build/perf/perf] Error 1
Makefile.perf:206: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:69: recipe for target 'all' failed
make: *** [all] Error 2
make: Leaving directory '/git/linux/tools/perf'
[root@seventh ~]# 

The container builds are ongoing, its possoble that this becomes an
issue in uCLibc, wasn't on musl libc (Alpine Linux).

- Arnaldo

  parent reply	other threads:[~2018-11-19 16:10 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-01 17:00 Jiri Olsa
2018-11-16 13:03 ` Jiri Olsa
2018-11-16 18:31 ` Arnaldo Carvalho de Melo
2018-11-16 18:42   ` Arnaldo Carvalho de Melo
2018-11-17  9:00     ` Jiri Olsa
2018-11-19 16:10 ` Arnaldo Carvalho de Melo [this message]
2018-11-20 10:56   ` Jiri Olsa
2018-11-20 11:23     ` [PATCHv2] " Jiri Olsa
2018-11-20 15:56     ` [PATCH] " Arnaldo Carvalho de Melo
2018-11-20 17:42       ` Jiri Olsa
2018-11-21 15:02 ` [tip:perf/urgent] perf tools: Restore proper cwd on return from mnt namespace tip-bot for Jiri Olsa

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