thread-map.c

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// SPDX-License-Identifier: GPL-2.0
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/prctl.h>
#include "tests.h"
#include "thread_map.h"
#include "debug.h"

#define NAME    (const char *) "perf"
#define NAMEUL  (unsigned long) NAME

int test__thread_map(struct test *test __maybe_unused, int subtest __maybe_unused)
{
    struct thread_map *map;

    TEST_ASSERT_VAL("failed to set process name",
            !prctl(PR_SET_NAME, NAMEUL, 0, 0, 0));

    /* test map on current pid */
    map = thread_map__new_by_pid(getpid());
    TEST_ASSERT_VAL("failed to alloc map", map);

    thread_map__read_comms(map);

    TEST_ASSERT_VAL("wrong nr", map->nr == 1);
    TEST_ASSERT_VAL("wrong pid",
            thread_map__pid(map, 0) == getpid());
    TEST_ASSERT_VAL("wrong comm",
            thread_map__comm(map, 0) &&
            !strcmp(thread_map__comm(map, 0), NAME));
    TEST_ASSERT_VAL("wrong refcnt",
            refcount_read(&map->refcnt) == 1);
    thread_map__put(map);

    /* test dummy pid */
    map = thread_map__new_dummy();
    TEST_ASSERT_VAL("failed to alloc map", map);

    thread_map__read_comms(map);

    TEST_ASSERT_VAL("wrong nr", map->nr == 1);
    TEST_ASSERT_VAL("wrong pid", thread_map__pid(map, 0) == -1);
    TEST_ASSERT_VAL("wrong comm",
            thread_map__comm(map, 0) &&
            !strcmp(thread_map__comm(map, 0), "dummy"));
    TEST_ASSERT_VAL("wrong refcnt",
            refcount_read(&map->refcnt) == 1);
    thread_map__put(map);
    return 0;
}

static int process_event(struct perf_tool *tool __maybe_unused,
             union perf_event *event,
             struct perf_sample *sample __maybe_unused,
             struct machine *machine __maybe_unused)
{
    struct thread_map_event *map = &event->thread_map;
    struct thread_map *threads;

    TEST_ASSERT_VAL("wrong nr",   map->nr == 1);
    TEST_ASSERT_VAL("wrong pid",  map->entries[0].pid == (u64) getpid());
    TEST_ASSERT_VAL("wrong comm", !strcmp(map->entries[0].comm, NAME));

    threads = thread_map__new_event(&event->thread_map);
    TEST_ASSERT_VAL("failed to alloc map", threads);

    TEST_ASSERT_VAL("wrong nr", threads->nr == 1);
    TEST_ASSERT_VAL("wrong pid",
            thread_map__pid(threads, 0) == getpid());
    TEST_ASSERT_VAL("wrong comm",
            thread_map__comm(threads, 0) &&
            !strcmp(thread_map__comm(threads, 0), NAME));
    TEST_ASSERT_VAL("wrong refcnt",
            refcount_read(&threads->refcnt) == 1);
    thread_map__put(threads);
    return 0;
}

int test__thread_map_synthesize(struct test *test __maybe_unused, int subtest __maybe_unused)
{
    struct thread_map *threads;

    TEST_ASSERT_VAL("failed to set process name",
            !prctl(PR_SET_NAME, NAMEUL, 0, 0, 0));

    /* test map on current pid */
    threads = thread_map__new_by_pid(getpid());
    TEST_ASSERT_VAL("failed to alloc map", threads);

    thread_map__read_comms(threads);

    TEST_ASSERT_VAL("failed to synthesize map",
        !perf_event__synthesize_thread_map2(NULL, threads, process_event, NULL));

    return 0;
}

int test__thread_map_remove(struct test *test __maybe_unused, int subtest __maybe_unused)
{
    struct thread_map *threads;
    char *str;
    int i;

    TEST_ASSERT_VAL("failed to allocate map string",
            asprintf(&str, "%d,%d", getpid(), getppid()) >= 0);

    threads = thread_map__new_str(str, NULL, 0, false);

    TEST_ASSERT_VAL("failed to allocate thread_map",
            threads);

    if (verbose > 0)
        thread_map__fprintf(threads, stderr);

    TEST_ASSERT_VAL("failed to remove thread",
            !thread_map__remove(threads, 0));

    TEST_ASSERT_VAL("thread_map count != 1", threads->nr == 1);

    if (verbose > 0)
        thread_map__fprintf(threads, stderr);

    TEST_ASSERT_VAL("failed to remove thread",
            !thread_map__remove(threads, 0));

    TEST_ASSERT_VAL("thread_map count != 0", threads->nr == 0);

    if (verbose > 0)
        thread_map__fprintf(threads, stderr);

    TEST_ASSERT_VAL("failed to not remove thread",
            thread_map__remove(threads, 0));

    for (i = 0; i < threads->nr; i++)
        free(threads->map[i].comm);

    free(threads);
    return 0;
}