diff options
| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-02-01 16:56:46 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-03-29 00:52:22 +0200 |
| commit | 87de2163a36b3ffb0d2e0df8e903dc7e30566548 (patch) | |
| tree | 123ed8f2fb5643c807815dd2299527ad9126becd | |
| parent | fprobe: Skip exit_handler if entry_handler returns !0 (diff) | |
| download | linux-87de2163a36b3ffb0d2e0df8e903dc7e30566548.tar.xz linux-87de2163a36b3ffb0d2e0df8e903dc7e30566548.zip | |
lib/test_fprobe: Add a testcase for skipping exit_handler
Add a testcase for skipping exit_handler if entry_handler
returns !0.
Link: https://lkml.kernel.org/r/167526700658.433354.12922388040490848613.stgit@mhiramat.roam.corp.google.com
Cc: Florent Revest <revest@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
| -rw-r--r-- | lib/test_fprobe.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/lib/test_fprobe.c b/lib/test_fprobe.c index 9fa2ac9eda83..0fe5273e960b 100644 --- a/lib/test_fprobe.c +++ b/lib/test_fprobe.c @@ -21,6 +21,7 @@ static u32 (*target_nest)(u32 value, u32 (*nest)(u32)); static unsigned long target_ip; static unsigned long target2_ip; static unsigned long target_nest_ip; +static int entry_return_value; static noinline u32 fprobe_selftest_target(u32 value) { @@ -52,7 +53,7 @@ static notrace int fp_entry_handler(struct fprobe *fp, unsigned long ip, } else KUNIT_EXPECT_NULL(current_test, data); - return 0; + return entry_return_value; } static notrace void fp_exit_handler(struct fprobe *fp, unsigned long ip, @@ -205,6 +206,28 @@ static void test_fprobe_nest(struct kunit *test) KUNIT_EXPECT_EQ(test, 0, unregister_fprobe(&fp)); } +static void test_fprobe_skip(struct kunit *test) +{ + struct fprobe fp = { + .entry_handler = fp_entry_handler, + .exit_handler = fp_exit_handler, + }; + + current_test = test; + KUNIT_EXPECT_EQ(test, 0, register_fprobe(&fp, "fprobe_selftest_target", NULL)); + + entry_return_value = 1; + entry_val = 0; + exit_val = 0; + target(rand1); + KUNIT_EXPECT_NE(test, 0, entry_val); + KUNIT_EXPECT_EQ(test, 0, exit_val); + KUNIT_EXPECT_EQ(test, 0, fp.nmissed); + entry_return_value = 0; + + KUNIT_EXPECT_EQ(test, 0, unregister_fprobe(&fp)); +} + static unsigned long get_ftrace_location(void *func) { unsigned long size, addr = (unsigned long)func; @@ -234,6 +257,7 @@ static struct kunit_case fprobe_testcases[] = { KUNIT_CASE(test_fprobe_syms), KUNIT_CASE(test_fprobe_data), KUNIT_CASE(test_fprobe_nest), + KUNIT_CASE(test_fprobe_skip), {} }; |