Debug 2040 (#2042)

Just to check if profraw is generated in coverage_run()

Author: tokatoka

experiment/measurer/run_coverage.py

@@ -44,6 +44,7 @@ def do_coverage_run(  # pylint: disable=too-many-locals
     """Does a coverage run of |coverage_binary| on |new_units_dir|. Writes
     the result to |profraw_file_pattern|."""
     with tempfile.TemporaryDirectory() as merge_dir:
+        logger.info("coverage binary exists?: %s", os.path.exists(os.path.abspath(coverage_binary)))
         command = [
             coverage_binary, '-merge=1', '-dump_coverage=1',
             f'-artifact_prefix={crashes_dir}/', f'-timeout={UNIT_TIMEOUT}',
@@ -61,6 +62,8 @@ def do_coverage_run(  # pylint: disable=too-many-locals
                                      expect_zero=False,
                                      kill_children=True,
                                      timeout=MAX_TOTAL_TIME)
+        
+        logger.info("coverage dir after coverage run %s", os.listdir(coverage_binary_dir))
 
     if result.retcode != 0:
         logger.error('Coverage run failed.',