diff options
| author | Song Chen <chensong_2000@189.cn> | 2022-12-30 14:33:19 +0800 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-02-24 09:44:15 +0900 |
| commit | 196b6389a363e0d7e6b6f2654b9889f9c821b9d3 (patch) | |
| tree | 66ee2e9f37825537267275c05e16094c4afea298 /kernel/trace/trace_probe.c | |
| parent | c96abaec78f34366b3ddf1c6be52ca5c1241e15b (diff) | |
kernel/trace: Introduce trace_probe_print_args and use it in *probes
print_probe_args is currently inplemented in trace_probe_tmpl.h and
included by *probes, as a result, each probe has an identical copy.
This patch will move it to trace_probe.c as an new API, each probe
calls it to print their args in trace file.
Link: https://lore.kernel.org/all/1672382000-18304-1-git-send-email-chensong_2000@189.cn/
Signed-off-by: Song Chen <chensong_2000@189.cn>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'kernel/trace/trace_probe.c')
| -rw-r--r-- | kernel/trace/trace_probe.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 11008c098727..20d0c4a97633 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -1239,3 +1239,30 @@ int trace_probe_create(const char *raw_command, int (*createfn)(int, const char return ret; } + +int trace_probe_print_args(struct trace_seq *s, struct probe_arg *args, int nr_args, + u8 *data, void *field) +{ + void *p; + int i, j; + + for (i = 0; i < nr_args; i++) { + struct probe_arg *a = args + i; + + trace_seq_printf(s, " %s=", a->name); + if (likely(!a->count)) { + if (!a->type->print(s, data + a->offset, field)) + return -ENOMEM; + continue; + } + trace_seq_putc(s, '{'); + p = data + a->offset; + for (j = 0; j < a->count; j++) { + if (!a->type->print(s, p, field)) + return -ENOMEM; + trace_seq_putc(s, j == a->count - 1 ? '}' : ','); + p += a->type->size; + } + } + return 0; +} |