tools/perf/tests/thread-map.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdlib.h>
   3 #include <sys/types.h>
   4 #include <unistd.h>
   5 #include <sys/prctl.h>
   6 #include "tests.h"
   7 #include "thread_map.h"
   8 #include "debug.h"
   9 #include <linux/zalloc.h>
  10
  11 #define NAME    (const char *) "perf"
  12 #define NAMEUL  (unsigned long) NAME
  13
  14 int test__thread_map(struct test *test __maybe_unused, int subtest __maybe_unused)
  15 {
  16         struct thread_map *map;
  17
  18         TEST_ASSERT_VAL("failed to set process name",
  19                         !prctl(PR_SET_NAME, NAMEUL, 0, 0, 0));
  20
  21         /* test map on current pid */
  22         map = thread_map__new_by_pid(getpid());
  23         TEST_ASSERT_VAL("failed to alloc map", map);
  24
  25         thread_map__read_comms(map);
  26
  27         TEST_ASSERT_VAL("wrong nr", map->nr == 1);
  28         TEST_ASSERT_VAL("wrong pid",
  29                         thread_map__pid(map, 0) == getpid());
  30         TEST_ASSERT_VAL("wrong comm",
  31                         thread_map__comm(map, 0) &&
  32                         !strcmp(thread_map__comm(map, 0), NAME));
  33         TEST_ASSERT_VAL("wrong refcnt",
  34                         refcount_read(&map->refcnt) == 1);
  35         thread_map__put(map);
  36
  37         /* test dummy pid */
  38         map = thread_map__new_dummy();
  39         TEST_ASSERT_VAL("failed to alloc map", map);
  40
  41         thread_map__read_comms(map);
  42
  43         TEST_ASSERT_VAL("wrong nr", map->nr == 1);
  44         TEST_ASSERT_VAL("wrong pid", thread_map__pid(map, 0) == -1);
  45         TEST_ASSERT_VAL("wrong comm",
  46                         thread_map__comm(map, 0) &&
  47                         !strcmp(thread_map__comm(map, 0), "dummy"));
  48         TEST_ASSERT_VAL("wrong refcnt",
  49                         refcount_read(&map->refcnt) == 1);
  50         thread_map__put(map);
  51         return 0;
  52 }
  53
  54 static int process_event(struct perf_tool *tool __maybe_unused,
  55                          union perf_event *event,
  56                          struct perf_sample *sample __maybe_unused,
  57                          struct machine *machine __maybe_unused)
  58 {
  59         struct thread_map_event *map = &event->thread_map;
  60         struct thread_map *threads;
  61
  62         TEST_ASSERT_VAL("wrong nr",   map->nr == 1);
  63         TEST_ASSERT_VAL("wrong pid",  map->entries[0].pid == (u64) getpid());
  64         TEST_ASSERT_VAL("wrong comm", !strcmp(map->entries[0].comm, NAME));
  65
  66         threads = thread_map__new_event(&event->thread_map);
  67         TEST_ASSERT_VAL("failed to alloc map", threads);
  68
  69         TEST_ASSERT_VAL("wrong nr", threads->nr == 1);
  70         TEST_ASSERT_VAL("wrong pid",
  71                         thread_map__pid(threads, 0) == getpid());
  72         TEST_ASSERT_VAL("wrong comm",
  73                         thread_map__comm(threads, 0) &&
  74                         !strcmp(thread_map__comm(threads, 0), NAME));
  75         TEST_ASSERT_VAL("wrong refcnt",
  76                         refcount_read(&threads->refcnt) == 1);
  77         thread_map__put(threads);
  78         return 0;
  79 }
  80
  81 int test__thread_map_synthesize(struct test *test __maybe_unused, int subtest __maybe_unused)
  82 {
  83         struct thread_map *threads;
  84
  85         TEST_ASSERT_VAL("failed to set process name",
  86                         !prctl(PR_SET_NAME, NAMEUL, 0, 0, 0));
  87
  88         /* test map on current pid */
  89         threads = thread_map__new_by_pid(getpid());
  90         TEST_ASSERT_VAL("failed to alloc map", threads);
  91
  92         thread_map__read_comms(threads);
  93
  94         TEST_ASSERT_VAL("failed to synthesize map",
  95                 !perf_event__synthesize_thread_map2(NULL, threads, process_event, NULL));
  96
  97         return 0;
  98 }
  99
 100 int test__thread_map_remove(struct test *test __maybe_unused, int subtest __maybe_unused)
 101 {
 102         struct thread_map *threads;
 103         char *str;
 104         int i;
 105
 106         TEST_ASSERT_VAL("failed to allocate map string",
 107                         asprintf(&str, "%d,%d", getpid(), getppid()) >= 0);
 108
 109         threads = thread_map__new_str(str, NULL, 0, false);
 110
 111         TEST_ASSERT_VAL("failed to allocate thread_map",
 112                         threads);
 113
 114         if (verbose > 0)
 115                 thread_map__fprintf(threads, stderr);
 116
 117         TEST_ASSERT_VAL("failed to remove thread",
 118                         !thread_map__remove(threads, 0));
 119
 120         TEST_ASSERT_VAL("thread_map count != 1", threads->nr == 1);
 121
 122         if (verbose > 0)
 123                 thread_map__fprintf(threads, stderr);
 124
 125         TEST_ASSERT_VAL("failed to remove thread",
 126                         !thread_map__remove(threads, 0));
 127
 128         TEST_ASSERT_VAL("thread_map count != 0", threads->nr == 0);
 129
 130         if (verbose > 0)
 131                 thread_map__fprintf(threads, stderr);
 132
 133         TEST_ASSERT_VAL("failed to not remove thread",
 134                         thread_map__remove(threads, 0));
 135
 136         for (i = 0; i < threads->nr; i++)
 137                 zfree(&threads->map[i].comm);
 138
 139         free(threads);
 140         return 0;
 141 }