Commit-ID: a08cae03f430b971afa508a32662dc476d42d8cb
Gitweb: http://git.kernel.org/tip/a08cae03f430b971afa508a32662dc476d42d8cb
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Wed, 7 May 2014 21:35:02 +0200
Committer: Jiri Olsa <jolsa@xxxxxxxxxx>
CommitDate: Thu, 12 Jun 2014 16:53:21 +0200
perf tools: Allow to close dso fd in case of open failure
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@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jean Pihet <jean.pihet@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1401892622-30848-9-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/util/dso.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index db63438..c30752c 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -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;
}
--
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