LXR linux/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
  14int 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
  54static 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
  81int 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
 100int 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}
 142