tests: subsys: swo: show more logs from jlink tool

Make failure analyze easier.

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

tests/subsys/swo/pytest/test_swo.py

@@ -119,11 +119,11 @@ def test_swo_logging(dut: DeviceAdapter):
     try:
         logger.info(f"Executing:\n{cmd}")
         proc = subprocess.Popen(
-            cmd,
+            cmd.split(),
+            stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT,
-            encoding="UTF-8",
-            shell=True,
+            encoding='UTF-8',
         )
     except OSError as exc:
         logger.error(f"Unable to start JLinkSWOViewerCLExe:\n{cmd=}\n{exc=}")
@@ -134,6 +134,8 @@ def test_swo_logging(dut: DeviceAdapter):
         pass
     finally:
         _kill(proc)
+        outs, errs = proc.communicate()
+        logger.info(f"{outs=}\n{errs=}")
 
     # read logs
     with open(f"{log_filename}", errors="ignore") as log_file: