struct thread_map *thread_map__new_by_pid(pid_t pid)
{
struct thread_map *threads;
char name[256];
int items;
struct dirent **namelist = NULL;
int i;
sprintf(name, "/proc/%d/task", pid);
items = scandir(name, &namelist, filter, NULL);
if (items <= 0)
return NULL;
threads = thread_map__alloc(items);
if (threads != NULL) {
for (i = 0; i < items; i++)
thread_map__set_pid(threads, i, atoi(namelist[i]->d_name));
threads->nr = items;
atomic_set(&threads->refcnt, 1);
}
for (i=0; i<items; i++)
zfree(&namelist[i]);
free(namelist);
return threads;
}
struct thread_map *thread_map__new_dummy(void)
{
struct thread_map *threads = thread_map__alloc(1);
if (threads != NULL) {
thread_map__set_pid(threads, 0, -1);
threads->nr = 1;
atomic_set(&threads->refcnt, 1);
}
return threads;
}
struct thread_map *thread_map__new_by_tid(pid_t tid)
{
struct thread_map *threads = thread_map__alloc(1);
if (threads != NULL) {
thread_map__set_pid(threads, 0, tid);
threads->nr = 1;
atomic_set(&threads->refcnt, 1);
}
return threads;
}
static void thread_map__copy_event(struct thread_map *threads,
struct thread_map_event *event)
{
unsigned i;
threads->nr = (int) event->nr;
for (i = 0; i < event->nr; i++) {
thread_map__set_pid(threads, i, (pid_t) event->entries[i].pid);
threads->map[i].comm = strndup(event->entries[i].comm, 16);
}
atomic_set(&threads->refcnt, 1);
}
struct thread_map *thread_map__new_by_tid_str(const char *tid_str)
{
struct thread_map *threads = NULL, *nt;
int ntasks = 0;
pid_t tid, prev_tid = INT_MAX;
char *end_ptr;
struct str_node *pos;
struct strlist_config slist_config = { .dont_dupstr = true, };
struct strlist *slist;
/* perf-stat expects threads to be generated even if tid not given */
if (!tid_str)
return thread_map__new_dummy();
slist = strlist__new(tid_str, &slist_config);
if (!slist)
return NULL;
strlist__for_each_entry(pos, slist) {
tid = strtol(pos->s, &end_ptr, 10);
if (tid == INT_MIN || tid == INT_MAX ||
(*end_ptr != '\0' && *end_ptr != ','))
goto out_free_threads;
if (tid == prev_tid)
continue;
ntasks++;
nt = thread_map__realloc(threads, ntasks);
if (nt == NULL)
goto out_free_threads;
threads = nt;
thread_map__set_pid(threads, ntasks - 1, tid);
threads->nr = ntasks;
}
out:
if (threads)
atomic_set(&threads->refcnt, 1);
return threads;
out_free_threads:
zfree(&threads);
strlist__delete(slist);
goto out;
}
struct thread_map *thread_map__new_by_uid(uid_t uid)
{
DIR *proc;
int max_threads = 32, items, i;
char path[256];
struct dirent *dirent, **namelist = NULL;
struct thread_map *threads = thread_map__alloc(max_threads);
if (threads == NULL)
goto out;
proc = opendir("/proc");
if (proc == NULL)
goto out_free_threads;
threads->nr = 0;
atomic_set(&threads->refcnt, 1);
while ((dirent = readdir(proc)) != NULL) {
char *end;
bool grow = false;
struct stat st;
pid_t pid = strtol(dirent->d_name, &end, 10);
if (*end) /* only interested in proper numerical dirents */
continue;
snprintf(path, sizeof(path), "/proc/%s", dirent->d_name);
if (stat(path, &st) != 0)
continue;
if (st.st_uid != uid)
continue;
snprintf(path, sizeof(path), "/proc/%d/task", pid);
items = scandir(path, &namelist, filter, NULL);
if (items <= 0)
goto out_free_closedir;
while (threads->nr + items >= max_threads) {
max_threads *= 2;
grow = true;
}
if (grow) {
struct thread_map *tmp;
tmp = thread_map__realloc(threads, max_threads);
if (tmp == NULL)
goto out_free_namelist;
threads = tmp;
}
for (i = 0; i < items; i++) {
thread_map__set_pid(threads, threads->nr + i,
atoi(namelist[i]->d_name));
}
for (i = 0; i < items; i++)
zfree(&namelist[i]);
free(namelist);
threads->nr += items;
}
out_closedir:
closedir(proc);
out:
return threads;
out_free_threads:
free(threads);
return NULL;
out_free_namelist:
for (i = 0; i < items; i++)
zfree(&namelist[i]);
free(namelist);
out_free_closedir:
zfree(&threads);
goto out_closedir;
}
static struct thread_map *thread_map__new_by_pid_str(const char *pid_str)
{
struct thread_map *threads = NULL, *nt;
char name[256];
int items, total_tasks = 0;
struct dirent **namelist = NULL;
int i, j = 0;
pid_t pid, prev_pid = INT_MAX;
char *end_ptr;
struct str_node *pos;
struct strlist_config slist_config = { .dont_dupstr = true, };
struct strlist *slist = strlist__new(pid_str, &slist_config);
if (!slist)
return NULL;
strlist__for_each_entry(pos, slist) {
pid = strtol(pos->s, &end_ptr, 10);
if (pid == INT_MIN || pid == INT_MAX ||
(*end_ptr != '\0' && *end_ptr != ','))
goto out_free_threads;
if (pid == prev_pid)
continue;
sprintf(name, "/proc/%d/task", pid);
items = scandir(name, &namelist, filter, NULL);
if (items <= 0)
goto out_free_threads;
total_tasks += items;
nt = thread_map__realloc(threads, total_tasks);
if (nt == NULL)
goto out_free_namelist;
threads = nt;
for (i = 0; i < items; i++) {
thread_map__set_pid(threads, j++, atoi(namelist[i]->d_name));
zfree(&namelist[i]);
}
threads->nr = total_tasks;
free(namelist);
}
out:
strlist__delete(slist);
if (threads)
atomic_set(&threads->refcnt, 1);
return threads;
out_free_namelist:
for (i = 0; i < items; i++)
zfree(&namelist[i]);
free(namelist);
out_free_threads:
zfree(&threads);
goto out;
}
int test__syscall_openat_tp_fields(int subtest __maybe_unused)
{
struct record_opts opts = {
.target = {
.uid = UINT_MAX,
.uses_mmap = true,
},
.no_buffering = true,
.freq = 1,
.mmap_pages = 256,
.raw_samples = true,
};
const char *filename = "/etc/passwd";
int flags = O_RDONLY | O_DIRECTORY;
struct perf_evlist *evlist = perf_evlist__new();
struct perf_evsel *evsel;
int err = -1, i, nr_events = 0, nr_polls = 0;
char sbuf[STRERR_BUFSIZE];
if (evlist == NULL) {
pr_debug("%s: perf_evlist__new\n", __func__);
goto out;
}
evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
if (IS_ERR(evsel)) {
pr_debug("%s: perf_evsel__newtp\n", __func__);
goto out_delete_evlist;
}
perf_evlist__add(evlist, evsel);
err = perf_evlist__create_maps(evlist, &opts.target);
if (err < 0) {
pr_debug("%s: perf_evlist__create_maps\n", __func__);
goto out_delete_evlist;
}
perf_evsel__config(evsel, &opts);
thread_map__set_pid(evlist->threads, 0, getpid());
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
strerror_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}
err = perf_evlist__mmap(evlist, UINT_MAX, false);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n",
strerror_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}
perf_evlist__enable(evlist);
/*
* Generate the event:
*/
openat(AT_FDCWD, filename, flags);
while (1) {
int before = nr_events;
for (i = 0; i < evlist->nr_mmaps; i++) {
union perf_event *event;
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
++nr_events;
if (type != PERF_RECORD_SAMPLE) {
perf_evlist__mmap_consume(evlist, i);
continue;
}
err = perf_evsel__parse_sample(evsel, event, &sample);
if (err) {
pr_debug("Can't parse sample, err = %d\n", err);
goto out_delete_evlist;
}
tp_flags = perf_evsel__intval(evsel, &sample, "flags");
if (flags != tp_flags) {
pr_debug("%s: Expected flags=%#x, got %#x\n",
__func__, flags, tp_flags);
goto out_delete_evlist;
}
goto out_ok;
}
}
if (nr_events == before)
perf_evlist__poll(evlist, 10);
if (++nr_polls > 5) {
pr_debug("%s: no events!\n", __func__);
goto out_delete_evlist;
}
}
out_ok:
err = 0;
out_delete_evlist:
perf_evlist__delete(evlist);
out:
return err;
}
