LXR linux/tools/perf/tests/thread-map.c

   1// SPDX-License-Identifier: GPL-2.0
   2#include <stdlib.h>
   3#include <string.h>
   4#include <sys/types.h>
   5#include <unistd.h>
   6#include <sys/prctl.h>
   7#include "tests.h"
   8#include "thread_map.h"
   9#include "debug.h"
  10#include "event.h"
  11#include "util/synthetic-events.h"
  12#include <linux/zalloc.h>
  13#include <perf/event.h>
  14
  15struct perf_sample;
  16struct perf_tool;
  17struct machine;
  18
  19#define NAME    (const char *) "perf"
  20#define NAMEUL  (unsigned long) NAME
  21
  22int test__thread_map(struct test *test __maybe_unused, int subtest __maybe_unused)
  23{
  24        struct perf_thread_map *map;
  25
  26        TEST_ASSERT_VAL("failed to set process name",
  27                        !prctl(PR_SET_NAME, NAMEUL, 0, 0, 0));
  28
  29        /* test map on current pid */
  30        map = thread_map__new_by_pid(getpid());
  31        TEST_ASSERT_VAL("failed to alloc map", map);
  32
  33        thread_map__read_comms(map);
  34
  35        TEST_ASSERT_VAL("wrong nr", map->nr == 1);
  36        TEST_ASSERT_VAL("wrong pid",
  37                        perf_thread_map__pid(map, 0) == getpid());
  38        TEST_ASSERT_VAL("wrong comm",
  39                        perf_thread_map__comm(map, 0) &&
  40                        !strcmp(perf_thread_map__comm(map, 0), NAME));
  41        TEST_ASSERT_VAL("wrong refcnt",
  42                        refcount_read(&map->refcnt) == 1);
  43        perf_thread_map__put(map);
  44
  45        /* test dummy pid */
  46        map = perf_thread_map__new_dummy();
  47        TEST_ASSERT_VAL("failed to alloc map", map);
  48
  49        thread_map__read_comms(map);
  50
  51        TEST_ASSERT_VAL("wrong nr", map->nr == 1);
  52        TEST_ASSERT_VAL("wrong pid", perf_thread_map__pid(map, 0) == -1);
  53        TEST_ASSERT_VAL("wrong comm",
  54                        perf_thread_map__comm(map, 0) &&
  55                        !strcmp(perf_thread_map__comm(map, 0), "dummy"));
  56        TEST_ASSERT_VAL("wrong refcnt",
  57                        refcount_read(&map->refcnt) == 1);
  58        perf_thread_map__put(map);
  59        return 0;
  60}
  61
  62static int process_event(struct perf_tool *tool __maybe_unused,
  63                         union perf_event *event,
  64                         struct perf_sample *sample __maybe_unused,
  65                         struct machine *machine __maybe_unused)
  66{
  67        struct perf_record_thread_map *map = &event->thread_map;
  68        struct perf_thread_map *threads;
  69
  70        TEST_ASSERT_VAL("wrong nr",   map->nr == 1);
  71        TEST_ASSERT_VAL("wrong pid",  map->entries[0].pid == (u64) getpid());
  72        TEST_ASSERT_VAL("wrong comm", !strcmp(map->entries[0].comm, NAME));
  73
  74        threads = thread_map__new_event(&event->thread_map);
  75        TEST_ASSERT_VAL("failed to alloc map", threads);
  76
  77        TEST_ASSERT_VAL("wrong nr", threads->nr == 1);
  78        TEST_ASSERT_VAL("wrong pid",
  79                        perf_thread_map__pid(threads, 0) == getpid());
  80        TEST_ASSERT_VAL("wrong comm",
  81                        perf_thread_map__comm(threads, 0) &&
  82                        !strcmp(perf_thread_map__comm(threads, 0), NAME));
  83        TEST_ASSERT_VAL("wrong refcnt",
  84                        refcount_read(&threads->refcnt) == 1);
  85        perf_thread_map__put(threads);
  86        return 0;
  87}
  88
  89int test__thread_map_synthesize(struct test *test __maybe_unused, int subtest __maybe_unused)
  90{
  91        struct perf_thread_map *threads;
  92
  93        TEST_ASSERT_VAL("failed to set process name",
  94                        !prctl(PR_SET_NAME, NAMEUL, 0, 0, 0));
  95
  96        /* test map on current pid */
  97        threads = thread_map__new_by_pid(getpid());
  98        TEST_ASSERT_VAL("failed to alloc map", threads);
  99
 100        thread_map__read_comms(threads);
 101
 102        TEST_ASSERT_VAL("failed to synthesize map",
 103                !perf_event__synthesize_thread_map2(NULL, threads, process_event, NULL));
 104
 105        return 0;
 106}
 107
 108int test__thread_map_remove(struct test *test __maybe_unused, int subtest __maybe_unused)
 109{
 110        struct perf_thread_map *threads;
 111        char *str;
 112        int i;
 113
 114        TEST_ASSERT_VAL("failed to allocate map string",
 115                        asprintf(&str, "%d,%d", getpid(), getppid()) >= 0);
 116
 117        threads = thread_map__new_str(str, NULL, 0, false);
 118
 119        TEST_ASSERT_VAL("failed to allocate thread_map",
 120                        threads);
 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 != 1", threads->nr == 1);
 129
 130        if (verbose > 0)
 131                thread_map__fprintf(threads, stderr);
 132
 133        TEST_ASSERT_VAL("failed to remove thread",
 134                        !thread_map__remove(threads, 0));
 135
 136        TEST_ASSERT_VAL("thread_map count != 0", threads->nr == 0);
 137
 138        if (verbose > 0)
 139                thread_map__fprintf(threads, stderr);
 140
 141        TEST_ASSERT_VAL("failed to not remove thread",
 142                        thread_map__remove(threads, 0));
 143
 144        for (i = 0; i < threads->nr; i++)
 145                zfree(&threads->map[i].comm);
 146
 147        free(threads);
 148        return 0;
 149}
 150