log: Use sys._getframe() to avoid stat(2) calls
The Osmo MS driver is launching many many processes and I would
like to use the logging framework for the code as well.
Unfortunately the inspect/traceback code will use a linecache which
will execute stat(2) on one or more python files.
Related: OS#2927
Change-Id: I8f6bacadcf74d3aa25db1e1f41644f64aa19cf92
diff --git a/src/osmo_gsm_tester/log.py b/src/osmo_gsm_tester/log.py
index a9f16c2..7c4ae44 100644
--- a/src/osmo_gsm_tester/log.py
+++ b/src/osmo_gsm_tester/log.py
@@ -275,8 +275,10 @@
target.large_separator(*msgs, sublevel=sublevel, space_above=space_above)
def get_src_from_caller(levels_up=1):
- caller = getframeinfo(stack()[levels_up][0])
- return '%s:%d' % (os.path.basename(caller.filename), caller.lineno)
+ # Poke into internal to avoid hitting the linecache which will make one or
+ # more calls to stat(2).
+ frame = sys._getframe(levels_up)
+ return '%s:%d' % (os.path.basename(frame.f_code.co_filename), frame.f_lineno)
def get_src_from_exc_info(exc_info=None, levels_up=1):
if exc_info is None: