430 lines
8.8 KiB
C
430 lines
8.8 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include "string2.h"
|
||
|
|
#include "strlist.h"
|
||
|
|
#include <string.h>
|
||
|
|
#include <api/fs/fs.h>
|
||
|
|
#include <linux/string.h>
|
||
|
|
#include <linux/zalloc.h>
|
||
|
|
#include "asm/bug.h"
|
||
|
|
#include "thread_map.h"
|
||
|
|
#include "debug.h"
|
||
|
|
#include "event.h"
|
||
|
|
|
||
|
|
/* Skip "." and ".." directories */
|
||
|
|
static int filter(const struct dirent *dir)
|
||
|
|
{
|
||
|
|
if (dir->d_name[0] == '.')
|
||
|
|
return 0;
|
||
|
|
else
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define thread_map__alloc(__nr) perf_thread_map__realloc(NULL, __nr)
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_by_pid(pid_t pid)
|
||
|
|
{
|
||
|
|
struct perf_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++)
|
||
|
|
perf_thread_map__set_pid(threads, i, atoi(namelist[i]->d_name));
|
||
|
|
threads->nr = items;
|
||
|
|
refcount_set(&threads->refcnt, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i=0; i<items; i++)
|
||
|
|
zfree(&namelist[i]);
|
||
|
|
free(namelist);
|
||
|
|
|
||
|
|
return threads;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_by_tid(pid_t tid)
|
||
|
|
{
|
||
|
|
struct perf_thread_map *threads = thread_map__alloc(1);
|
||
|
|
|
||
|
|
if (threads != NULL) {
|
||
|
|
perf_thread_map__set_pid(threads, 0, tid);
|
||
|
|
threads->nr = 1;
|
||
|
|
refcount_set(&threads->refcnt, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
return threads;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct perf_thread_map *__thread_map__new_all_cpus(uid_t uid)
|
||
|
|
{
|
||
|
|
DIR *proc;
|
||
|
|
int max_threads = 32, items, i;
|
||
|
|
char path[NAME_MAX + 1 + 6];
|
||
|
|
struct dirent *dirent, **namelist = NULL;
|
||
|
|
struct perf_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;
|
||
|
|
refcount_set(&threads->refcnt, 1);
|
||
|
|
|
||
|
|
while ((dirent = readdir(proc)) != NULL) {
|
||
|
|
char *end;
|
||
|
|
bool grow = false;
|
||
|
|
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 (uid != UINT_MAX) {
|
||
|
|
struct stat st;
|
||
|
|
|
||
|
|
if (stat(path, &st) != 0 || 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 perf_thread_map *tmp;
|
||
|
|
|
||
|
|
tmp = perf_thread_map__realloc(threads, max_threads);
|
||
|
|
if (tmp == NULL)
|
||
|
|
goto out_free_namelist;
|
||
|
|
|
||
|
|
threads = tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < items; i++) {
|
||
|
|
perf_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;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_all_cpus(void)
|
||
|
|
{
|
||
|
|
return __thread_map__new_all_cpus(UINT_MAX);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_by_uid(uid_t uid)
|
||
|
|
{
|
||
|
|
return __thread_map__new_all_cpus(uid);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new(pid_t pid, pid_t tid, uid_t uid)
|
||
|
|
{
|
||
|
|
if (pid != -1)
|
||
|
|
return thread_map__new_by_pid(pid);
|
||
|
|
|
||
|
|
if (tid == -1 && uid != UINT_MAX)
|
||
|
|
return thread_map__new_by_uid(uid);
|
||
|
|
|
||
|
|
return thread_map__new_by_tid(tid);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct perf_thread_map *thread_map__new_by_pid_str(const char *pid_str)
|
||
|
|
{
|
||
|
|
struct perf_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 = perf_thread_map__realloc(threads, total_tasks);
|
||
|
|
if (nt == NULL)
|
||
|
|
goto out_free_namelist;
|
||
|
|
|
||
|
|
threads = nt;
|
||
|
|
|
||
|
|
for (i = 0; i < items; i++) {
|
||
|
|
perf_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)
|
||
|
|
refcount_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;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_by_tid_str(const char *tid_str)
|
||
|
|
{
|
||
|
|
struct perf_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 perf_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 = perf_thread_map__realloc(threads, ntasks);
|
||
|
|
|
||
|
|
if (nt == NULL)
|
||
|
|
goto out_free_threads;
|
||
|
|
|
||
|
|
threads = nt;
|
||
|
|
perf_thread_map__set_pid(threads, ntasks - 1, tid);
|
||
|
|
threads->nr = ntasks;
|
||
|
|
}
|
||
|
|
out:
|
||
|
|
if (threads)
|
||
|
|
refcount_set(&threads->refcnt, 1);
|
||
|
|
return threads;
|
||
|
|
|
||
|
|
out_free_threads:
|
||
|
|
zfree(&threads);
|
||
|
|
strlist__delete(slist);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_str(const char *pid, const char *tid,
|
||
|
|
uid_t uid, bool all_threads)
|
||
|
|
{
|
||
|
|
if (pid)
|
||
|
|
return thread_map__new_by_pid_str(pid);
|
||
|
|
|
||
|
|
if (!tid && uid != UINT_MAX)
|
||
|
|
return thread_map__new_by_uid(uid);
|
||
|
|
|
||
|
|
if (all_threads)
|
||
|
|
return thread_map__new_all_cpus();
|
||
|
|
|
||
|
|
return thread_map__new_by_tid_str(tid);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t thread_map__fprintf(struct perf_thread_map *threads, FILE *fp)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
size_t printed = fprintf(fp, "%d thread%s: ",
|
||
|
|
threads->nr, threads->nr > 1 ? "s" : "");
|
||
|
|
for (i = 0; i < threads->nr; ++i)
|
||
|
|
printed += fprintf(fp, "%s%d", i ? ", " : "", perf_thread_map__pid(threads, i));
|
||
|
|
|
||
|
|
return printed + fprintf(fp, "\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
static int get_comm(char **comm, pid_t pid)
|
||
|
|
{
|
||
|
|
char *path;
|
||
|
|
size_t size;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (asprintf(&path, "%s/%d/comm", procfs__mountpoint(), pid) == -1)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
err = filename__read_str(path, comm, &size);
|
||
|
|
if (!err) {
|
||
|
|
/*
|
||
|
|
* We're reading 16 bytes, while filename__read_str
|
||
|
|
* allocates data per BUFSIZ bytes, so we can safely
|
||
|
|
* mark the end of the string.
|
||
|
|
*/
|
||
|
|
(*comm)[size] = 0;
|
||
|
|
strim(*comm);
|
||
|
|
}
|
||
|
|
|
||
|
|
free(path);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void comm_init(struct perf_thread_map *map, int i)
|
||
|
|
{
|
||
|
|
pid_t pid = perf_thread_map__pid(map, i);
|
||
|
|
char *comm = NULL;
|
||
|
|
|
||
|
|
/* dummy pid comm initialization */
|
||
|
|
if (pid == -1) {
|
||
|
|
map->map[i].comm = strdup("dummy");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The comm name is like extra bonus ;-),
|
||
|
|
* so just warn if we fail for any reason.
|
||
|
|
*/
|
||
|
|
if (get_comm(&comm, pid))
|
||
|
|
pr_warning("Couldn't resolve comm name for pid %d\n", pid);
|
||
|
|
|
||
|
|
map->map[i].comm = comm;
|
||
|
|
}
|
||
|
|
|
||
|
|
void thread_map__read_comms(struct perf_thread_map *threads)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < threads->nr; ++i)
|
||
|
|
comm_init(threads, i);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void thread_map__copy_event(struct perf_thread_map *threads,
|
||
|
|
struct perf_record_thread_map *event)
|
||
|
|
{
|
||
|
|
unsigned i;
|
||
|
|
|
||
|
|
threads->nr = (int) event->nr;
|
||
|
|
|
||
|
|
for (i = 0; i < event->nr; i++) {
|
||
|
|
perf_thread_map__set_pid(threads, i, (pid_t) event->entries[i].pid);
|
||
|
|
threads->map[i].comm = strndup(event->entries[i].comm, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
refcount_set(&threads->refcnt, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct perf_thread_map *thread_map__new_event(struct perf_record_thread_map *event)
|
||
|
|
{
|
||
|
|
struct perf_thread_map *threads;
|
||
|
|
|
||
|
|
threads = thread_map__alloc(event->nr);
|
||
|
|
if (threads)
|
||
|
|
thread_map__copy_event(threads, event);
|
||
|
|
|
||
|
|
return threads;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool thread_map__has(struct perf_thread_map *threads, pid_t pid)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < threads->nr; ++i) {
|
||
|
|
if (threads->map[i].pid == pid)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
int thread_map__remove(struct perf_thread_map *threads, int idx)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (threads->nr < 1)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (idx >= threads->nr)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Free the 'idx' item and shift the rest up.
|
||
|
|
*/
|
||
|
|
zfree(&threads->map[idx].comm);
|
||
|
|
|
||
|
|
for (i = idx; i < threads->nr - 1; i++)
|
||
|
|
threads->map[i] = threads->map[i + 1];
|
||
|
|
|
||
|
|
threads->nr--;
|
||
|
|
return 0;
|
||
|
|
}
|