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Subject[PATCH] perf, tools: Stop perf stat -p when profiled process exits v3
Date
From: Andi Kleen <ak@linux.intel.com>

When counting a process with perf stat -p check if the process died
and exit collection if yes.

v2: Add more checks, handle non -p again. Handle /proc not there.
v3: Handle multi pid case. Fix non /proc error path
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/builtin-stat.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 861f0ae..b5e7df2 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -536,7 +536,19 @@ static int run_perf_stat(int argc __used, const char **argv)
if (WIFSIGNALED(status))
psignal(WTERMSIG(status), argv[0]);
} else {
- while(!done) sleep(1);
+ char piddir[40];
+ int check_proc = target.pid &&
+ access("/proc", X_OK) == 0 &&
+ !strchr(target.pid, ',');
+ if (check_proc)
+ snprintf(piddir, sizeof piddir, "/proc/%d",
+ atoi(target.pid));
+ while(!done) {
+ sleep(1);
+ if (check_proc && access(piddir, X_OK) < 0 &&
+ errno == ENOENT)
+ break;
+ }
}

t1 = rdclock();
--
1.7.7.6


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