diff options
| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-02-01 16:56:38 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-03-29 00:52:22 +0200 |
| commit | 39d954200bf6ad503c722e44d0be80c7b826fa42 (patch) | |
| tree | 01cc0df2f14044b41f9cedfb2c5b3fa6da26ec2c /samples | |
| parent | lib/test_fprobe: Add a test case for nr_maxactive (diff) | |
| download | linux-39d954200bf6ad503c722e44d0be80c7b826fa42.tar.xz linux-39d954200bf6ad503c722e44d0be80c7b826fa42.zip | |
fprobe: Skip exit_handler if entry_handler returns !0
Skip hooking function return and calling exit_handler if the
entry_handler() returns !0.
Link: https://lkml.kernel.org/r/167526699798.433354.10998365726830117303.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>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/fprobe/fprobe_example.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/samples/fprobe/fprobe_example.c b/samples/fprobe/fprobe_example.c index dd794990ad7e..4efc8feb6277 100644 --- a/samples/fprobe/fprobe_example.c +++ b/samples/fprobe/fprobe_example.c @@ -48,8 +48,8 @@ static void show_backtrace(void) stack_trace_print(stacks, len, 24); } -static void sample_entry_handler(struct fprobe *fp, unsigned long ip, - struct pt_regs *regs, void *data) +static int sample_entry_handler(struct fprobe *fp, unsigned long ip, + struct pt_regs *regs, void *data) { if (use_trace) /* @@ -62,6 +62,7 @@ static void sample_entry_handler(struct fprobe *fp, unsigned long ip, nhit++; if (stackdump) show_backtrace(); + return 0; } static void sample_exit_handler(struct fprobe *fp, unsigned long ip, struct pt_regs *regs, |