Handle the process runs shorter than expected

In this case the subprocess will go into zombie state until we can poll
it. We can simply assume this is the case if it's still detected as
running when we get a ValueError.

Author: lkollar

Lib/profile/sample.py

@@ -57,6 +57,14 @@ def sample(self, collector, duration_sec=10):
                     break
                 except (RuntimeError, UnicodeDecodeError, MemoryError, OSError):
                     errors += 1
+                except ValueError as e:
+                    # Process is waiting to be reaped by the parent (us)
+                    if self._is_process_running():
+                        duration_sec = (
+                            current_time - start_time
+                        )
+                        break
+                    raise e from None
                 except Exception as e:
                     if not self._is_process_running():
                         break
@@ -784,6 +792,8 @@ def main():
 
         process = subprocess.Popen(cmd)
 
+        # If we are the ones starting the process, we need to wait until the
+        # runtime state is initialized
         try:
             wait_for_process_and_sample(process.pid, sort_value, args)
         finally: