linux_dsm_epyc7002/tools/perf/tests/openat-syscall.c
Jiri Olsa 8dd2a1317e perf evsel: Propagate error info from tp_format
Propagate error info from tp_format via ERR_PTR to get it all the way
down to the parse-event.c tracepoint adding routines. Following
functions now return pointer with encoded error:

  - tp_format
  - trace_event__tp_format
  - perf_evsel__newtp_idx
  - perf_evsel__newtp

This affects several other places in perf, that cannot use pointer check
anymore, but must utilize the err.h interface, when getting error
information from above functions list.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Raphael Beamonte <raphael.beamonte@gmail.com>
Link: http://lkml.kernel.org/r/1441615087-13886-5-git-send-email-jolsa@kernel.org
[ Add two missing ERR_PTR() and one IS_ERR() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-15 09:48:33 -03:00

61 lines
1.5 KiB
C

#include <api/fs/tracing_path.h>
#include <linux/err.h>
#include "thread_map.h"
#include "evsel.h"
#include "debug.h"
#include "tests.h"
int test__openat_syscall_event(void)
{
int err = -1, fd;
struct perf_evsel *evsel;
unsigned int nr_openat_calls = 111, i;
struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
char sbuf[STRERR_BUFSIZE];
char errbuf[BUFSIZ];
if (threads == NULL) {
pr_debug("thread_map__new\n");
return -1;
}
evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
if (IS_ERR(evsel)) {
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
pr_err("%s\n", errbuf);
goto out_thread_map_delete;
}
if (perf_evsel__open_per_thread(evsel, threads) < 0) {
pr_debug("failed to open counter: %s, "
"tweak /proc/sys/kernel/perf_event_paranoid?\n",
strerror_r(errno, sbuf, sizeof(sbuf)));
goto out_evsel_delete;
}
for (i = 0; i < nr_openat_calls; ++i) {
fd = openat(0, "/etc/passwd", O_RDONLY);
close(fd);
}
if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
pr_debug("perf_evsel__read_on_cpu\n");
goto out_close_fd;
}
if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) {
pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val);
goto out_close_fd;
}
err = 0;
out_close_fd:
perf_evsel__close_fd(evsel, 1, threads->nr);
out_evsel_delete:
perf_evsel__delete(evsel);
out_thread_map_delete:
thread_map__put(threads);
return err;
}