[Bug runtime/29832] New: probe python.function.entry does not get hits (while .return does)

["mcermak at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29832

            Bug ID: 29832
           Summary: probe python.function.entry does not get hits (while
                    .return does)
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: mcermak at redhat dot com
  Target Milestone: ---

With both systemtap-4.8-1.fc38 and the upstream git commit
342e5ec5619066f227ff9c3a5c,
probe python.function.entry isn't getting hits, while respective .return prob
gets hit just fine:

# cat test.py 
import random, time
print(random.random())
time.sleep(3)
# stap -we 'probe process("/usr/lib*/libpython*.so*").mark("function__return")
{filename = user_string($arg1); if  (filename =~ "random") {println(filename)
exit()}}' -c 'python3 ./test.py >/dev/null'
/usr/lib64/python3.11/random.py
# stap -we 'probe process("/usr/lib*/libpython*.so*").mark("function__entry")
{filename = user_string($arg1); if  (filename =~ "random") {println(filename)
exit()}}' -c 'python3 ./test.py >/dev/null'
# 
#

This is with python3-3.11.0-1.fc38.x86_64.

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