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From: mhiramat@kernel.org (Masami Hiramatsu)
Subject: [PATCH 11/25] selftests/ftrace: Improve kprobe on module testcase to load/unload module
Date: Fri, 27 Jul 2018 21:15:08 +0900	[thread overview]
Message-ID: <153269370853.3084.10985190108092225790.stgit@devbox> (raw)
Message-ID: <20180727121508.NqhIQBqvS4-Mi_AymOcy7V7Pz3m1K6_PNm9gdJW23sM@z> (raw)
In-Reply-To: <153269339575.3084.16279591141931053689.stgit@devbox>

Improve kprobe events on module testcase to check module
load/unload with disabled/enabled events. This also change
the target module to trace_printk.ko, so it depends on
CONFIG_SAMPLE_TRACE_PRINTK=m.

Signed-off-by: Masami Hiramatsu <mhiramat at kernel.org>
---
 tools/testing/selftests/ftrace/config              |    4 ++
 .../ftrace/test.d/kprobe/kprobe_module.tc          |   35 ++++++++++++++++++--
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config
index b01924c71c09..766669592173 100644
--- a/tools/testing/selftests/ftrace/config
+++ b/tools/testing/selftests/ftrace/config
@@ -4,3 +4,7 @@ CONFIG_FUNCTION_PROFILER=y
 CONFIG_TRACER_SNAPSHOT=y
 CONFIG_STACK_TRACER=y
 CONFIG_HIST_TRIGGERS=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_SAMPLES=y
+CONFIG_SAMPLE_TRACE_PRINTK=m
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc
index ec6c5fffef1e..1efe9e616bc4 100644
--- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc
@@ -4,11 +4,18 @@
 
 [ -f kprobe_events ] || exit_unsupported # this is configurable
 
+rmmod trace-printk ||:
+if ! modprobe trace-printk.ko ; then
+  echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK=
+m"
+  exit_unresolved;
+fi
+
+MOD=trace_printk
+FUNC=trace_printk_irq_work
+
 :;: "Add an event on a module function without specifying event name" ;:
 
-MOD=`lsmod | head -n 2 | tail -n 1 | cut -f1 -d" "`
-FUNC=`grep -m 1 ".* t .*\\[$MOD\\]" /proc/kallsyms | xargs | cut -f3 -d" "`
-[ "x" != "x$MOD" -a "y" != "y$FUNC" ] || exit_unresolved
 echo "p $MOD:$FUNC" > kprobe_events
 PROBE_NAME=`echo $MOD:$FUNC | tr ".:" "_"`
 test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure
@@ -22,3 +29,25 @@ test -d events/kprobes/event1 || exit_failure
 
 echo "p:kprobes1/event1 $MOD:$FUNC" > kprobe_events
 test -d events/kprobes1/event1 || exit_failure
+
+:;: "Remove target module, but event still be there" ;:
+if ! rmmod trace-printk ; then
+  echo "Failed to unload module - please enable CONFIG_MODULE_UNLOAD"
+  exit_unresolved;
+fi
+test -d events/kprobes1/event1
+
+:;: "Check posibility to defining events on unloaded module";:
+echo "p:event2 $MOD:$FUNC" >> kprobe_events
+
+:;: "Target is gone, but we can prepare for next time";:
+echo 1 > events/kprobes1/event1/enable
+
+:;: "Load module again, which means the event1 should be recorded";:
+modprobe trace-printk.ko
+grep "event1:" trace
+
+:;: "Remove the module again and check the event is not locked"
+rmmod trace-printk
+echo 0 > events/kprobes1/event1/enable
+echo "-:kprobes1/event1" >> kprobe_events

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  parent reply	other threads:[~2018-07-27 12:15 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-27 12:09 [PATCH 00/25] selftests/ftrace: Improve ftracetest with coverage check Masami Hiramatsu
2018-07-27 12:09 ` Masami Hiramatsu
2018-07-27 12:09 ` mhiramat
2018-07-27 12:10 ` [PATCH 01/25] tracing: Allow gcov profiling on only ftrace subsystem Masami Hiramatsu
2018-07-27 12:10   ` Masami Hiramatsu
2018-07-27 12:10   ` mhiramat
2018-07-27 12:10 ` [PATCH 02/25] selftests/ftrace: Add --stop-fail hidden option for debug Masami Hiramatsu
2018-07-27 12:10   ` Masami Hiramatsu
2018-07-27 12:10   ` mhiramat
2018-07-27 12:11 ` [PATCH 03/25] selftests/ftrace: Add --console hidden option Masami Hiramatsu
2018-07-27 12:11   ` Masami Hiramatsu
2018-07-27 12:11   ` mhiramat
2018-07-27 12:11 ` [PATCH 04/25] selftests/ftrace: Add case number prefix to logfile Masami Hiramatsu
2018-07-27 12:11   ` Masami Hiramatsu
2018-07-27 12:11   ` mhiramat
2018-07-27 12:12 ` [PATCH 05/25] selftests/ftrace: More initialize features in initialize_ftrace Masami Hiramatsu
2018-07-27 12:12   ` Masami Hiramatsu
2018-07-27 12:12   ` mhiramat
2018-07-27 12:12 ` [PATCH 06/25] selftests/ftrace: Cleanup ftrace after running test Masami Hiramatsu
2018-07-27 12:12   ` Masami Hiramatsu
2018-07-27 12:12   ` mhiramat
2018-07-27 12:13 ` [PATCH 07/25] selftests/ftrace: Remove unneeded per-test init/cleanup ftrace Masami Hiramatsu
2018-07-27 12:13   ` Masami Hiramatsu
2018-07-27 12:13   ` mhiramat
2018-07-27 12:13 ` [PATCH 08/25] selftests/ftrace: Fix to test kprobe $comm arg only if available Masami Hiramatsu
2018-07-27 12:13   ` Masami Hiramatsu
2018-07-27 12:13   ` mhiramat
2018-07-27 12:14 ` [PATCH 09/25] selftests/ftrace: Fix checkbashisms errors Masami Hiramatsu
2018-07-27 12:14   ` Masami Hiramatsu
2018-07-27 12:14   ` mhiramat
2018-07-27 12:14 ` [PATCH 10/25] selftests/ftrace: Use loopback address instead of localhost Masami Hiramatsu
2018-07-27 12:14   ` Masami Hiramatsu
2018-07-27 12:14   ` mhiramat
2018-07-27 12:15 ` Masami Hiramatsu [this message]
2018-07-27 12:15   ` [PATCH 11/25] selftests/ftrace: Improve kprobe on module testcase to load/unload module Masami Hiramatsu
2018-07-27 12:15   ` mhiramat
2018-08-02  1:02   ` Masami Hiramatsu
2018-08-02  1:02     ` Masami Hiramatsu
2018-08-02  1:02     ` mhiramat
2018-08-02  7:22     ` Masami Hiramatsu
2018-08-02  7:22       ` Masami Hiramatsu
2018-08-02  7:22       ` mhiramat
2018-07-27 12:15 ` [PATCH 12/25] selftests/ftrace: Improve kprobe testcase to check log data Masami Hiramatsu
2018-07-27 12:15   ` Masami Hiramatsu
2018-07-27 12:15   ` mhiramat
2018-07-27 12:16 ` [PATCH 13/25] selftests/ftrace: Improve kretprobe " Masami Hiramatsu
2018-07-27 12:16   ` Masami Hiramatsu
2018-07-27 12:16   ` mhiramat
2018-07-27 12:16 ` [PATCH 14/25] selftests/ftrace: Test kprobe-event argument with various bitsize Masami Hiramatsu
2018-07-27 12:16   ` Masami Hiramatsu
2018-07-27 12:16   ` mhiramat
2018-07-27 12:17 ` [PATCH 15/25] selftests/ftrace: Check set_event_pid result Masami Hiramatsu
2018-07-27 12:17   ` Masami Hiramatsu
2018-07-27 12:17   ` mhiramat
2018-07-27 12:17 ` [PATCH 16/25] selftests/ftrace: Add kprobe event with $comm argument testcase Masami Hiramatsu
2018-07-27 12:17   ` Masami Hiramatsu
2018-07-27 12:17   ` mhiramat
2018-07-27 12:17 ` [PATCH 17/25] selftests/ftrace: Add kprobe profile testcase Masami Hiramatsu
2018-07-27 12:17   ` Masami Hiramatsu
2018-07-27 12:17   ` mhiramat
2018-07-27 12:18 ` [PATCH 18/25] selftests/ftrace: Add a testcase for nop tracer Masami Hiramatsu
2018-07-27 12:18   ` Masami Hiramatsu
2018-07-27 12:18   ` mhiramat
2018-07-27 12:18 ` [PATCH 19/25] selftests/ftrace: Add kprobe-event with symbol argument test Masami Hiramatsu
2018-07-27 12:18   ` Masami Hiramatsu
2018-07-27 12:18   ` mhiramat
2018-07-27 12:19 ` [PATCH 20/25] selftests/ftrace: Add trace_printk sample module test Masami Hiramatsu
2018-07-27 12:19   ` Masami Hiramatsu
2018-07-27 12:19   ` mhiramat
2018-07-27 12:19 ` [PATCH 21/25] selftests/ftrace: Add ringbuffer size changing testcase Masami Hiramatsu
2018-07-27 12:19   ` Masami Hiramatsu
2018-07-27 12:19   ` mhiramat
2018-07-27 12:20 ` [PATCH 22/25] selftests/ftrace: Add function profiling stat testcase Masami Hiramatsu
2018-07-27 12:20   ` Masami Hiramatsu
2018-07-27 12:20   ` mhiramat
2018-07-27 12:20 ` [PATCH 23/25] selftests/ftrace: Add max stack tracer testcase Masami Hiramatsu
2018-07-27 12:20   ` Masami Hiramatsu
2018-07-27 12:20   ` mhiramat
2018-08-03  5:24   ` Masami Hiramatsu
2018-08-03  5:24     ` Masami Hiramatsu
2018-08-03  5:24     ` mhiramat
2018-07-27 12:21 ` [PATCH 24/25] selftests/ftrace: Add function filter on module testcase Masami Hiramatsu
2018-07-27 12:21   ` Masami Hiramatsu
2018-07-27 12:21   ` mhiramat
2018-07-27 12:21 ` [PATCH 25/25] selftests/ftrace: Add trace_pipe testcase Masami Hiramatsu
2018-07-27 12:21   ` Masami Hiramatsu
2018-07-27 12:21   ` mhiramat

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