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perf tools: Open perf.data with O_CLOEXEC flag 

Do not carry the perf.data file descriptor into the workload process and
close it when perf executes the workload.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170908084621.31595-2-jolsa@kernel.org
[ Add definitions for O_CLOEXEC for older systems ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
zero-colors
Jiri Olsa 2017-09-08 10:46:20 +02:00 committed by Arnaldo Carvalho de Melo
parent 58b79186c3
commit cd6379ebb5
1 changed files with 12 additions and 1 deletions
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13
tools/perf/util/data.c
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@ -10,6 +10,16 @@
#include "util.h"
#include "debug.h"
#ifndef O_CLOEXEC
#ifdef __sparc__
#define O_CLOEXEC 0x400000
#elif defined(__alpha__) || defined(__hppa__)
#define O_CLOEXEC 010000000
#else
#define O_CLOEXEC 02000000
#endif
#endif
static bool check_pipe(struct perf_data_file *file)
{
struct stat st;
@ -96,7 +106,8 @@ static int open_file_write(struct perf_data_file *file)
if (check_backup(file))
return -1;
fd = open(file->path, O_CREAT|O_RDWR|O_TRUNC, S_IRUSR|S_IWUSR);
fd = open(file->path, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC,
S_IRUSR|S_IWUSR);
if (fd < 0)
pr_err("failed to open %s : %s\n", file->path,