kperf_helpers.c   [plain text]

#include "kperf_helpers.h"

#include <darwintest.h>
#include <kperf/kperf.h>
#include <unistd.h>

void
configure_kperf_stacks_timer(pid_t pid, unsigned int period_ms)
{
    kperf_reset();

    (void)kperf_action_count_set(1);
    (void)kperf_timer_count_set(1);

    T_ASSERT_POSIX_SUCCESS(kperf_action_samplers_set(1,
        KPERF_SAMPLER_USTACK | KPERF_SAMPLER_KSTACK), NULL);

    if (pid != -1) {
        T_ASSERT_POSIX_SUCCESS(kperf_action_filter_set_by_pid(1, pid), NULL);
    }

    T_ASSERT_POSIX_SUCCESS(kperf_timer_action_set(0, 1), NULL);
    T_ASSERT_POSIX_SUCCESS(kperf_timer_period_set(0,
        kperf_ns_to_ticks(period_ms * NSEC_PER_MSEC)), NULL);
}