mirror of https://gitee.com/openkylin/linux.git
137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "thread_map.h"
|
|
#include "cpumap.h"
|
|
#include "tests.h"
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
|
|
static int exited;
|
|
static int nr_exit;
|
|
|
|
static void sig_handler(int sig __maybe_unused)
|
|
{
|
|
exited = 1;
|
|
}
|
|
|
|
/*
|
|
* perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
|
|
* we asked by setting its exec_error to this handler.
|
|
*/
|
|
static void workload_exec_failed_signal(int signo __maybe_unused,
|
|
siginfo_t *info __maybe_unused,
|
|
void *ucontext __maybe_unused)
|
|
{
|
|
exited = 1;
|
|
nr_exit = -1;
|
|
}
|
|
|
|
/*
|
|
* This test will start a workload that does nothing then it checks
|
|
* if the number of exit event reported by the kernel is 1 or not
|
|
* in order to check the kernel returns correct number of event.
|
|
*/
|
|
int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused)
|
|
{
|
|
int err = -1;
|
|
union perf_event *event;
|
|
struct perf_evsel *evsel;
|
|
struct perf_evlist *evlist;
|
|
struct target target = {
|
|
.uid = UINT_MAX,
|
|
.uses_mmap = true,
|
|
};
|
|
const char *argv[] = { "true", NULL };
|
|
char sbuf[STRERR_BUFSIZE];
|
|
struct cpu_map *cpus;
|
|
struct thread_map *threads;
|
|
|
|
signal(SIGCHLD, sig_handler);
|
|
|
|
evlist = perf_evlist__new_default();
|
|
if (evlist == NULL) {
|
|
pr_debug("perf_evlist__new_default\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Create maps of threads and cpus to monitor. In this case
|
|
* we start with all threads and cpus (-1, -1) but then in
|
|
* perf_evlist__prepare_workload we'll fill in the only thread
|
|
* we're monitoring, the one forked there.
|
|
*/
|
|
cpus = cpu_map__dummy_new();
|
|
threads = thread_map__new_by_tid(-1);
|
|
if (!cpus || !threads) {
|
|
err = -ENOMEM;
|
|
pr_debug("Not enough memory to create thread/cpu maps\n");
|
|
goto out_free_maps;
|
|
}
|
|
|
|
perf_evlist__set_maps(evlist, cpus, threads);
|
|
|
|
cpus = NULL;
|
|
threads = NULL;
|
|
|
|
err = perf_evlist__prepare_workload(evlist, &target, argv, false,
|
|
workload_exec_failed_signal);
|
|
if (err < 0) {
|
|
pr_debug("Couldn't run the workload!\n");
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
evsel = perf_evlist__first(evlist);
|
|
evsel->attr.task = 1;
|
|
#ifdef __s390x__
|
|
evsel->attr.sample_freq = 1000000;
|
|
#else
|
|
evsel->attr.sample_freq = 1;
|
|
#endif
|
|
evsel->attr.inherit = 0;
|
|
evsel->attr.watermark = 0;
|
|
evsel->attr.wakeup_events = 1;
|
|
evsel->attr.exclude_kernel = 1;
|
|
|
|
err = perf_evlist__open(evlist);
|
|
if (err < 0) {
|
|
pr_debug("Couldn't open the evlist: %s\n",
|
|
str_error_r(-err, sbuf, sizeof(sbuf)));
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
if (perf_evlist__mmap(evlist, 128) < 0) {
|
|
pr_debug("failed to mmap events: %d (%s)\n", errno,
|
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
perf_evlist__start_workload(evlist);
|
|
|
|
retry:
|
|
while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
|
|
if (event->header.type == PERF_RECORD_EXIT)
|
|
nr_exit++;
|
|
|
|
perf_evlist__mmap_consume(evlist, 0);
|
|
}
|
|
|
|
if (!exited || !nr_exit) {
|
|
perf_evlist__poll(evlist, -1);
|
|
goto retry;
|
|
}
|
|
|
|
if (nr_exit != 1) {
|
|
pr_debug("received %d EXIT records\n", nr_exit);
|
|
err = -1;
|
|
}
|
|
|
|
out_free_maps:
|
|
cpu_map__put(cpus);
|
|
thread_map__put(threads);
|
|
out_delete_evlist:
|
|
perf_evlist__delete(evlist);
|
|
return err;
|
|
}
|