On Thu, 2021-09-16 at 14:46 +0200, Alexander Kanavin wrote:

Currently, ptest-runner simply kills the offending test without further ado,
which is not at all helpful when trying to figure out why it happens
(especially if such hangs are intermittent and rare). There's now a script
that gets executed before killing the test, so ideas on what to have in it
are welcome.

Signed-off-by: Alexander Kanavin <alex@...>
---
Makefile | 2 +-
ptest-runner-collect-system-data | 5 +++++
utils.c | 24 ++++++++++++++++++++++++
3 files changed, 30 insertions(+), 1 deletion(-)
create mode 100755 ptest-runner-collect-system-data

diff --git a/Makefile b/Makefile
index a6372de..168cf5a 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,7 @@ $(TEST_EXECUTABLE): $(TEST_OBJECTS)
$(CC) $(LDFLAGS) $(TEST_OBJECTS) -o $@ $(TEST_LIBSTATIC) $(TEST_LDFLAGS)

check: $(TEST_EXECUTABLE)
- ./$(TEST_EXECUTABLE) -d $(TEST_DATA)
+ PATH=.:$(PATH) ./$(TEST_EXECUTABLE) -d $(TEST_DATA)

.c.o:
$(CC) $(CFLAGS) -c $< -o $@
diff --git a/ptest-runner-collect-system-data b/ptest-runner-collect-system-data
new file mode 100755
index 0000000..5bfeaf3
--- /dev/null
+++ b/ptest-runner-collect-system-data
@@ -0,0 +1,5 @@
+#!/bin/sh
+# Other ideas on what to do when a ptest gets stuck welcome.
+pstree -a -l
+df
+free

It is great to see this. I'd suggest dmesg in here since we've seen components
of tests segfault before (e.g. lttng-relayd in lttng-tools).

Cheers,

Richard