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perf trace: Introduce syscall__augmented_args() method

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That will be used by trace__sys_enter when we start combining the
augmented syscalls:sys_enter_FOO + syscalls:sys_exit_FOO.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-iiseo3s0qbf9i3rzn8k597bv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-09-03 16:07:53 -03:00
parent 7538d16397
commit 8a041f86a8
1 changed files with 12 additions and 4 deletions
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16
tools/perf/builtin-trace.c
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@ -1677,6 +1677,17 @@ static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
return printed;
}
static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size)
{
void *augmented_args = NULL;
*augmented_args_size = sample->raw_size - sc->args_size;
if (*augmented_args_size > 0)
augmented_args = sample->raw_data + sc->args_size;
return augmented_args;
}
static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
union perf_event *event __maybe_unused,
struct perf_sample *sample)
@ -1762,10 +1773,7 @@ static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evse
goto out_put;
args = perf_evsel__sc_tp_ptr(evsel, args, sample);
augmented_args_size = sample->raw_size - sc->args_size;
if (augmented_args_size > 0)
augmented_args = sample->raw_data + sc->args_size;
augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size);
syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
fprintf(trace->output, "%s", msg);
err = 0;