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perf trace: Use evsel->handler.func

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I.e. we don't need to resolve the evsel via the id and then check if it
is this or that event, just stash the right handler at evsel creation
time, then use evsel->handler.func() straight away.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bpz3axzr4f2cjppf4egm28wf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-09-28 17:58:36 -03:00
parent d6e66832a7
commit ba3d7deeef
1 changed files with 87 additions and 45 deletions
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132
tools/perf/builtin-trace.c
View File

@ -114,10 +114,85 @@ static size_t syscall__fprintf_args(struct syscall *sc, unsigned long *args, FIL
return printed;
}
typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample);
static struct syscall *trace__syscall_info(struct trace *trace,
struct perf_evsel *evsel,
struct perf_sample *sample)
{
int id = perf_evsel__intval(evsel, sample, "id");
if (id < 0) {
printf("Invalid syscall %d id, skipping...\n", id);
return NULL;
}
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
trace__read_syscall_info(trace, id))
goto out_cant_read;
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
goto out_cant_read;
return &trace->syscalls.table[id];
out_cant_read:
printf("Problems reading syscall %d information\n", id);
return NULL;
}
static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample)
{
void *args;
struct syscall *sc = trace__syscall_info(trace, evsel, sample);
if (sc == NULL)
return -1;
args = perf_evsel__rawptr(evsel, sample, "args");
if (args == NULL) {
printf("Problems reading syscall arguments\n");
return -1;
}
printf("%s(", sc->name);
syscall__fprintf_args(sc, args, stdout);
return 0;
}
static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample)
{
int ret;
struct syscall *sc = trace__syscall_info(trace, evsel, sample);
if (sc == NULL)
return -1;
ret = perf_evsel__intval(evsel, sample, "ret");
if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
char bf[256];
const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
*e = audit_errno_to_name(-ret);
printf(") = -1 %s %s", e, emsg);
} else if (ret == 0 && sc->fmt && sc->fmt->timeout)
printf(") = 0 Timeout");
else
printf(") = %d", ret);
putchar('\n');
return 0;
}
static int trace__run(struct trace *trace)
{
struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
struct perf_evsel *evsel, *evsel_enter, *evsel_exit;
struct perf_evsel *evsel;
int err = -1, i, nr_events = 0, before;
if (evlist == NULL) {
@ -125,21 +200,23 @@ static int trace__run(struct trace *trace)
goto out;
}
evsel_enter = perf_evsel__newtp("raw_syscalls", "sys_enter", 0);
if (evsel_enter == NULL) {
evsel = perf_evsel__newtp("raw_syscalls", "sys_enter", 0);
if (evsel == NULL) {
printf("Couldn't read the raw_syscalls:sys_enter tracepoint information!\n");
goto out_delete_evlist;
}
perf_evlist__add(evlist, evsel_enter);
evsel->handler.func = trace__sys_enter;
perf_evlist__add(evlist, evsel);
evsel_exit = perf_evsel__newtp("raw_syscalls", "sys_exit", 1);
if (evsel_exit == NULL) {
evsel = perf_evsel__newtp("raw_syscalls", "sys_exit", 1);
if (evsel == NULL) {
printf("Couldn't read the raw_syscalls:sys_exit tracepoint information!\n");
goto out_delete_evlist;
}
perf_evlist__add(evlist, evsel_exit);
evsel->handler.func = trace__sys_exit;
perf_evlist__add(evlist, evsel);
err = perf_evlist__create_maps(evlist, &trace->opts.target);
if (err < 0) {
@ -170,9 +247,8 @@ again:
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
const u32 type = event->header.type;
struct syscall *sc;
tracepoint_handler handler;
struct perf_sample sample;
int id;
++nr_events;
@ -200,45 +276,11 @@ again:
continue;
}
id = perf_evsel__intval(evsel, &sample, "id");
if (id < 0) {
printf("Invalid syscall %d id, skipping...\n", id);
continue;
}
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
trace__read_syscall_info(trace, id))
continue;
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
continue;
sc = &trace->syscalls.table[id];
if (evlist->threads->map[0] == -1 || evlist->threads->nr > 1)
printf("%d ", sample.tid);
if (evsel == evsel_enter) {
void *args = perf_evsel__rawptr(evsel, &sample, "args");
printf("%s(", sc->name);
syscall__fprintf_args(sc, args, stdout);
} else if (evsel == evsel_exit) {
int ret = perf_evsel__intval(evsel, &sample, "ret");
if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
char bf[256];
const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
*e = audit_errno_to_name(-ret);
printf(") = -1 %s %s", e, emsg);
} else if (ret == 0 && sc->fmt && sc->fmt->timeout)
printf(") = 0 Timeout");
else
printf(") = %d", ret);
putchar('\n');
}
handler = evsel->handler.func;
handler(trace, evsel, &sample);
}
}