Quelle  thread-map.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/prctl.h>
#include "tests.h"
#include "thread_map.h"
#include "debug.h"
#include "event.h"
#include "util/synthetic-events.h"
#include <linux/zalloc.h>
#include <perf/event.h>
#include <internal/threadmap.h>

struct perf_sample;
struct perf_tool;
struct machine;

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

static int test__thread_map(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
 struct perf_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",
   perf_thread_map__pid(map, 0) == getpid());
 TEST_ASSERT_VAL("wrong comm",
   perf_thread_map__comm(map, 0) &&
   !strcmp(perf_thread_map__comm(map, 0), NAME));
 TEST_ASSERT_VAL("wrong refcnt",
   refcount_read(&map->refcnt) == 1);
 perf_thread_map__put(map);

 /* test dummy pid */
 map = perf_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", perf_thread_map__pid(map, 0) == -1);
 TEST_ASSERT_VAL("wrong comm",
   perf_thread_map__comm(map, 0) &&
   !strcmp(perf_thread_map__comm(map, 0), "dummy"));
 TEST_ASSERT_VAL("wrong refcnt",
   refcount_read(&map->refcnt) == 1);
 perf_thread_map__put(map);
 return 0;
}

static int process_event(const struct perf_tool *tool __maybe_unused,
    union perf_event *event,
    struct perf_sample *sample __maybe_unused,
    struct machine *machine __maybe_unused)
{
 struct perf_record_thread_map *map = &event->thread_map;
 struct perf_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",
   perf_thread_map__pid(threads, 0) == getpid());
 TEST_ASSERT_VAL("wrong comm",
   perf_thread_map__comm(threads, 0) &&
   !strcmp(perf_thread_map__comm(threads, 0), NAME));
 TEST_ASSERT_VAL("wrong refcnt",
   refcount_read(&threads->refcnt) == 1);
 perf_thread_map__put(threads);
 return 0;
}

static int test__thread_map_synthesize(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
 struct perf_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));

 perf_thread_map__put(threads);
 return 0;
}

static int test__thread_map_remove(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
 struct perf_thread_map *threads;
 char *str;

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

 threads = thread_map__new_str(str, /*tid=*/NULL, /*all_threads=*/false);
 free(str);

 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));

 perf_thread_map__put(threads);
 return 0;
}

DEFINE_SUITE("Thread map", thread_map);
DEFINE_SUITE("Synthesize thread map", thread_map_synthesize);
DEFINE_SUITE("Remove thread map", thread_map_remove);