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Yann Droneaud 57480d2cd9 perf tools: Enable close-on-exec flag on perf file descriptor 
In commit a21b0b354d ('perf: Introduce a flag to enable
close-on-exec in perf_event_open()'), flag PERF_FLAG_FD_CLOEXEC
was added to perf_event_open(2) syscall to allows userspace
to atomically enable close-on-exec behavor when creating
the file descriptor.

This patch makes perf tools use the new flag if supported
by the kernel, so that the event file descriptors got
automatically closed if perf tool exec a sub-command.

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/1404160127-7475-1-git-send-email-ydroneaud@opteya.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-07-18 09:09:34 +02:00
..
bench.h perf bench: Add --repeat option 2014-06-19 16:13:15 -03:00
futex-hash.c perf bench: Add futex-hash microbenchmark 2014-03-14 11:20:43 -03:00
futex-requeue.c perf bench futex: Use global --repeat option 2014-06-19 16:13:16 -03:00
futex-wake.c perf bench futex: Use global --repeat option 2014-06-19 16:13:16 -03:00
futex.h perf bench: Add futex-requeue microbenchmark 2014-03-14 11:20:44 -03:00
mem-memcpy-arch.h tools/perf: Standardize feature support define names to: HAVE_{FEATURE}_SUPPORT 2013-10-09 08:48:28 +02:00
mem-memcpy-x86-64-asm-def.h perf bench: Also allow measuring alternative memcpy implementations 2012-01-24 19:51:01 -02:00
mem-memcpy-x86-64-asm.S Merge branch 'perf/urgent' into perf/core 2012-02-06 19:11:02 -02:00
mem-memcpy.c perf tools: Enable close-on-exec flag on perf file descriptor 2014-07-18 09:09:34 +02:00
mem-memset-arch.h tools/perf: Standardize feature support define names to: HAVE_{FEATURE}_SUPPORT 2013-10-09 08:48:28 +02:00
mem-memset-x86-64-asm-def.h perf bench: Also allow measuring memset() 2012-01-24 20:25:32 -02:00
mem-memset-x86-64-asm.S perf tool: Fix perf stack to non executable on x86_64 2012-02-06 19:14:17 -02:00
mem-memset.c perf tools: Enable close-on-exec flag on perf file descriptor 2014-07-18 09:09:34 +02:00
numa.c Merge branch 'perf-core-for-mingo' into perf/urgent 2014-04-14 16:45:39 +02:00
sched-messaging.c perf bench sched-messaging: Drop barf() 2014-06-19 16:13:17 -03:00
sched-pipe.c perf bench sched: Add --threaded option 2013-10-11 12:17:25 -03:00