[PATCH v9.1 10/11] selftests/ftrace: Add BTF arguments test cases
From: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Date: 2023-05-02 02:19:55
Also in:
bpf, lkml
Subsystem:
kernel selftest framework, the rest, tracing · Maintainers:
Shuah Khan, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Masami Hiramatsu (Google) <mhiramat@kernel.org> Add test cases to check the BTF arguments correctly supported. Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> --- Changes in v7: - Add BTF void retval test case --- .../ftrace/test.d/dynevent/add_remove_btfarg.tc | 54 ++++++++++++++++++++ .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc | 11 ++++ .../ftrace/test.d/kprobe/kprobe_syntax_errors.tc | 11 ++++ 3 files changed, 76 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
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
new file mode 100644
index 000000000000..15515f0a8c9a
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc@@ -0,0 +1,54 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Generic dynamic event - add/remove probes with BTF arguments +# requires: dynamic_events "<argname>":README + +KPROBES= +FPROBES= + +if grep -qF "p[:[<group>/][<event>]] <place> [<args>]" README ; then + KPROBES=yes +fi +if grep -qF "f[:[<group>/][<event>]] <func-name>[%return] [<args>]" README ; then + FPROBES=yes +fi + +if [ -z "$KPROBES" -a "$FPROBES" ] ; then + exit_unsupported +fi + +echo 0 > events/enable +echo > dynamic_events + +TP=kfree + +if [ "$FPROBES" ] ; then +echo "f:fpevent $TP object" >> dynamic_events +echo "t:tpevent $TP ptr" >> dynamic_events + +grep -q "fpevent.*object=object" dynamic_events +grep -q "tpevent.*ptr=ptr" dynamic_events + +echo > dynamic_events + +echo "f:fpevent $TP "'$$args' >> dynamic_events +echo "t:tpevent $TP "'$$args' >> dynamic_events + +grep -q "fpevent.*object=object" dynamic_events +grep -q "tpevent.*ptr=ptr" dynamic_events +! grep -q "tpevent.*_data" dynamic_events +fi + +echo > dynamic_events + +if [ "$KPROBES" ] ; then +echo "p:kpevent $TP object" >> dynamic_events +grep -q "kpevent.*object=object" dynamic_events + +echo > dynamic_events + +echo "p:kpevent $TP "'$$args' >> dynamic_events +grep -q "kpevent.*object=object" dynamic_events +fi + +clear_trace
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
index 549daa162d84..f2d000bf6371 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc@@ -85,4 +85,15 @@ fi # %return suffix errors check_error 'f vfs_read^%hoge' # BAD_ADDR_SUFFIX +# BTF arguments errors +if grep -q "<argname>" README; then +check_error 'f vfs_read $$args ^$$args' # DOUBLE_ARGS +check_error 'f vfs_read%return ^$$args' # NOFENTRY_ARGS +check_error 'f vfs_read ^hoge' # NO_BTFARG +check_error 'f kfree%return ^$retval' # NO_RETVAL +else +check_error 'f vfs_read $$args' # NOSUP_BTFARG +check_error 't kfree $$args' # NOSUP_BTFARG +fi + exit 0
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
index 97c08867490a..d9add5d408f0 100644
--- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc@@ -103,4 +103,15 @@ check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX check_error 'p ^vfs_read+10%return' # BAD_RETPROBE fi +# BTF arguments errors +if grep -q "<argname>" README; then +check_error 'p vfs_read $$args ^$$args' # DOUBLE_ARGS +check_error 'r vfs_read ^$$args' # NOFENTRY_ARGS +check_error 'p vfs_read+8 ^$$args' # NOFENTRY_ARGS +check_error 'p vfs_read ^hoge' # NO_BTFARG +check_error 'r vfs_read ^$retval' # NO_RETVAL +else +check_error 'p vfs_read $$args' # NOSUP_BTFARG +fi + exit 0