5113f6f70
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kernel add
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#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
");
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_debug("%s
", 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?
",
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
");
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 "
",
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;
}
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