_damo_records: Handle a case where a process finished while collecting memory footprint

The target process could be terminated while collecting memory
footprint.  Handle the case by treating the process as just not using
memory anymore.

Signed-off-by: SeongJae Park <sj@kernel.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/_damo_records.py b/_damo_records.py
index 914a5333..3c0faa85 100644
--- a/_damo_records.py
+++ b/_damo_records.py
@@ -532,8 +532,12 @@ class MemFootprint:
         if pid is None:
             return
 
-        with open('/proc/%s/statm' % pid, 'r') as f:
-            fields = [int(x) for x in f.read().split()]
+        try:
+            with open('/proc/%s/statm' % pid, 'r') as f:
+                fields = [int(x) for x in f.read().split()]
+        except:
+            # the process may terminated.  Just think it as not using memory.
+            fields = [0 for _ in range(7)]
         self.size = fields[0]
         self.resident = fields[1]
         self.shared = fields[2]