[PATCH 4/5] selftests/ftrace: Add BTF fields access testcases
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STALE1211d
From: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Date: 2023-06-17 09:48:01
Also in:
bpf, lkml
Subsystem:
kernel selftest framework, the rest, tracing · Maintainers:
Shuah Khan, Shuah Khan, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
Revision v1 of 6 in this series.
Revisions (6)
From: Masami Hiramatsu (Google) <mhiramat@kernel.org> Add test cases for accessing the data structure fields using BTF info. This includes the field access from parameters and retval, and accessing string information. Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> --- .../ftrace/test.d/dynevent/add_remove_btfarg.tc | 11 +++++++++++ .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc | 4 ++++ 2 files changed, 15 insertions(+)
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
index b89de1771655..1c46906ebf54 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc@@ -21,6 +21,8 @@ echo 0 > events/enable echo > dynamic_events TP=kfree +TP2=kmem_cache_alloc +TP3=getname_flags if [ "$FPROBES" ] ; then echo "f:fpevent $TP object" >> dynamic_events
@@ -33,6 +35,7 @@ echo > dynamic_events echo "f:fpevent $TP "'$arg1' >> dynamic_events grep -q "fpevent.*object=object" dynamic_events + echo > dynamic_events echo "f:fpevent $TP "'$arg*' >> dynamic_events
@@ -45,6 +48,14 @@ fi echo > dynamic_events +echo "t:tpevent $TP2 name=s->name:string" >> dynamic_events +echo "f:fpevent ${TP3}%return path=retval->name:string" >> dynamic_events + +grep -q "tpevent.*name=s->name:string" dynamic_events +grep -q "fpevent.*path=retval->name:string" dynamic_events + +echo > dynamic_events + if [ "$KPROBES" ] ; then echo "p:kpevent $TP object" >> dynamic_events grep -q "kpevent.*object=object" dynamic_events
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
index 812f5b3f6055..c948095d0d15 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc@@ -103,6 +103,10 @@ check_error 'f vfs_read%return ^$arg*' # NOFENTRY_ARGS check_error 'f vfs_read ^hoge' # NO_BTFARG check_error 'f kfree ^$arg10' # NO_BTFARG (exceed the number of parameters) check_error 'f kfree%return ^$retval' # NO_RETVAL +check_error 'f vfs_read%return retval->^foo' # NO_PTR_STRCT +check_error 'f vfs_read file->^foo' # NO_BTF_FIELD +check_error 'f vfs_read file^-.foo' # BAD_HYPHEN +check_error 'f vfs_read ^file:string' # BAD_TYPE4STR else check_error 'f vfs_read ^$arg*' # NOSUP_BTFARG check_error 't kfree ^$arg*' # NOSUP_BTFARG