153 lines
3.3 KiB
C
Executable File
153 lines
3.3 KiB
C
Executable File
#include <linux/types.h>
|
|
#include <unistd.h>
|
|
#include <sys/prctl.h>
|
|
|
|
#include "parse-events.h"
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "thread_map.h"
|
|
#include "cpumap.h"
|
|
#include "tests.h"
|
|
|
|
#define CHECK__(x) { \
|
|
while ((x) < 0) { \
|
|
pr_debug(#x " failed!\n"); \
|
|
goto out_err; \
|
|
} \
|
|
}
|
|
|
|
#define CHECK_NOT_NULL__(x) { \
|
|
while ((x) == NULL) { \
|
|
pr_debug(#x " failed!\n"); \
|
|
goto out_err; \
|
|
} \
|
|
}
|
|
|
|
static int find_comm(struct perf_evlist *evlist, const char *comm)
|
|
{
|
|
union perf_event *event;
|
|
int i, found;
|
|
|
|
found = 0;
|
|
for (i = 0; i < evlist->nr_mmaps; i++) {
|
|
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
|
|
if (event->header.type == PERF_RECORD_COMM &&
|
|
(pid_t)event->comm.pid == getpid() &&
|
|
(pid_t)event->comm.tid == getpid() &&
|
|
strcmp(event->comm.comm, comm) == 0)
|
|
found += 1;
|
|
perf_evlist__mmap_consume(evlist, i);
|
|
}
|
|
}
|
|
return found;
|
|
}
|
|
|
|
/**
|
|
* test__keep_tracking - test using a dummy software event to keep tracking.
|
|
*
|
|
* This function implements a test that checks that tracking events continue
|
|
* when an event is disabled but a dummy software event is not disabled. If the
|
|
* test passes %0 is returned, otherwise %-1 is returned.
|
|
*/
|
|
int test__keep_tracking(void)
|
|
{
|
|
struct record_opts opts = {
|
|
.mmap_pages = UINT_MAX,
|
|
.user_freq = UINT_MAX,
|
|
.user_interval = ULLONG_MAX,
|
|
.freq = 4000,
|
|
.target = {
|
|
.uses_mmap = true,
|
|
},
|
|
};
|
|
struct thread_map *threads = NULL;
|
|
struct cpu_map *cpus = NULL;
|
|
struct perf_evlist *evlist = NULL;
|
|
struct perf_evsel *evsel = NULL;
|
|
int found, err = -1;
|
|
const char *comm;
|
|
|
|
threads = thread_map__new(-1, getpid(), UINT_MAX);
|
|
CHECK_NOT_NULL__(threads);
|
|
|
|
cpus = cpu_map__new(NULL);
|
|
CHECK_NOT_NULL__(cpus);
|
|
|
|
evlist = perf_evlist__new();
|
|
CHECK_NOT_NULL__(evlist);
|
|
|
|
perf_evlist__set_maps(evlist, cpus, threads);
|
|
|
|
CHECK__(parse_events(evlist, "dummy:u"));
|
|
CHECK__(parse_events(evlist, "cycles:u"));
|
|
|
|
perf_evlist__config(evlist, &opts);
|
|
|
|
evsel = perf_evlist__first(evlist);
|
|
|
|
evsel->attr.comm = 1;
|
|
evsel->attr.disabled = 1;
|
|
evsel->attr.enable_on_exec = 0;
|
|
|
|
if (perf_evlist__open(evlist) < 0) {
|
|
fprintf(stderr, " (not supported)");
|
|
err = 0;
|
|
goto out_err;
|
|
}
|
|
|
|
CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false));
|
|
|
|
/*
|
|
* First, test that a 'comm' event can be found when the event is
|
|
* enabled.
|
|
*/
|
|
|
|
perf_evlist__enable(evlist);
|
|
|
|
comm = "Test COMM 1";
|
|
CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
|
|
|
|
perf_evlist__disable(evlist);
|
|
|
|
found = find_comm(evlist, comm);
|
|
if (found != 1) {
|
|
pr_debug("First time, failed to find tracking event.\n");
|
|
goto out_err;
|
|
}
|
|
|
|
/*
|
|
* Secondly, test that a 'comm' event can be found when the event is
|
|
* disabled with the dummy event still enabled.
|
|
*/
|
|
|
|
perf_evlist__enable(evlist);
|
|
|
|
evsel = perf_evlist__last(evlist);
|
|
|
|
CHECK__(perf_evlist__disable_event(evlist, evsel));
|
|
|
|
comm = "Test COMM 2";
|
|
CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
|
|
|
|
perf_evlist__disable(evlist);
|
|
|
|
found = find_comm(evlist, comm);
|
|
if (found != 1) {
|
|
pr_debug("Seconf time, failed to find tracking event.\n");
|
|
goto out_err;
|
|
}
|
|
|
|
err = 0;
|
|
|
|
out_err:
|
|
if (evlist) {
|
|
perf_evlist__disable(evlist);
|
|
perf_evlist__delete(evlist);
|
|
} else {
|
|
cpu_map__delete(cpus);
|
|
thread_map__delete(threads);
|
|
}
|
|
|
|
return err;
|
|
}
|