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perf tools: Allow to close dso fd in case of open failure

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Adding do_open function that tries to close opened
dso objects in case we fail to open the dso due to
to crossing the allowed RLIMIT_NOFILE limit.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-9-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
Jiri Olsa 2014-05-07 21:35:02 +02:00
parent c3fbd2a606
commit a08cae03f4
1 changed files with 22 additions and 1 deletions
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23
tools/perf/util/dso.c
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@ -159,6 +159,27 @@ static void dso__list_del(struct dso *dso)
dso__data_open_cnt--;
}
static void close_first_dso(void);
static int do_open(char *name)
{
int fd;
do {
fd = open(name, O_RDONLY);
if (fd >= 0)
return fd;
pr_debug("dso open failed, mmap: %s\n", strerror(errno));
if (!dso__data_open_cnt || errno != EMFILE)
break;
close_first_dso();
} while (1);
return -1;
}
static int __open_dso(struct dso *dso, struct machine *machine)
{
int fd;
@ -177,7 +198,7 @@ static int __open_dso(struct dso *dso, struct machine *machine)
return -EINVAL;
}
fd = open(name, O_RDONLY);
fd = do_open(name);
free(name);
return fd;
}