static int bp_accounting(int wp_cnt, int share)
{
struct perf_event_attr attr, attr_mod, attr_new;
int i, fd[wp_cnt], fd_wp, ret;
for (i = 0; i < wp_cnt; i++) {
fd[i] = wp_event((void *)&the_var, &attr);
TEST_ASSERT_VAL("failed to create wp\n", fd[i] != -1);
pr_debug("wp %d created\n", i);
}
attr_mod = attr;
attr_mod.bp_type = HW_BREAKPOINT_X;
attr_mod.bp_addr = (unsigned long) test_function;
ret = ioctl(fd[0], PERF_EVENT_IOC_MODIFY_ATTRIBUTES, &attr_mod);
TEST_ASSERT_VAL("failed to modify wp\n", ret == 0);
pr_debug("wp 0 modified to bp\n");
if (!share) {
fd_wp = wp_event((void *)&the_var, &attr_new);
TEST_ASSERT_VAL("failed to create max wp\n", fd_wp != -1);
pr_debug("wp max created\n");
}
for (i = 0; i < wp_cnt; i++)
close(fd[i]);
return 0;
}
static int mmap_events(synth_cb synth)
{
struct machines machines;
struct machine *machine;
int err, i;
/*
* The threads_create will not return before all threads
* are spawned and all created memory map.
*
* They will loop until threads_destroy is called, so we
* can safely run synthesizing function.
*/
TEST_ASSERT_VAL("failed to create threads", !threads_create());
machines__init(&machines);
machine = &machines.host;
dump_trace = verbose > 1 ? 1 : 0;
err = synth(machine);
dump_trace = 0;
TEST_ASSERT_VAL("failed to destroy threads", !threads_destroy());
TEST_ASSERT_VAL("failed to synthesize maps", !err);
/*
* All data is synthesized, try to find map for each
* thread object.
*/
for (i = 0; i < THREADS; i++) {
struct thread_data *td = &threads[i];
struct addr_location al;
struct thread *thread;
thread = machine__findnew_thread(machine, getpid(), td->tid);
pr_debug("looking for map %p\n", td->map);
thread__find_addr_map(thread,
PERF_RECORD_MISC_USER, MAP__FUNCTION,
(unsigned long) (td->map + 1), &al);
thread__put(thread);
if (!al.map) {
pr_debug("failed, couldn't find map\n");
err = -1;
break;
}
pr_debug("map %p, addr %" PRIx64 "\n", al.map, al.map->start);
}
machine__delete_threads(machine);
machines__exit(&machines);
return err;
}
/*
* This test creates 'THREADS' number of threads (including
* main thread) and each thread creates memory map.
*
* When threads are created, we synthesize them with both
* (separate tests):
* perf_event__synthesize_thread_map (process based)
* perf_event__synthesize_threads (global)
*
* We test we can find all memory maps via:
* thread__find_addr_map
*
* by using all thread objects.
*/
int test__mmap_thread_lookup(int subtest __maybe_unused)
{
/* perf_event__synthesize_threads synthesize */
TEST_ASSERT_VAL("failed with sythesizing all",
!mmap_events(synth_all));
/* perf_event__synthesize_thread_map synthesize */
TEST_ASSERT_VAL("failed with sythesizing process",
!mmap_events(synth_process));
return 0;
}
static int test_is_kernel_module(const char *path, int cpumode, bool expect)
{
TEST_ASSERT_VAL("is_kernel_module",
(!!is_kernel_module(path, cpumode)) == (!!expect));
pr_debug("%s (cpumode: %d) - is_kernel_module: %s\n",
path, cpumode, expect ? "true" : "false");
return 0;
}
static int test(const char *path, bool alloc_name, bool alloc_ext,
bool kmod, bool comp, const char *name, const char *ext)
{
struct kmod_path m;
memset(&m, 0x0, sizeof(m));
TEST_ASSERT_VAL("kmod_path__parse",
!__kmod_path__parse(&m, path, alloc_name, alloc_ext));
pr_debug("%s - alloc name %d, alloc ext %d, kmod %d, comp %d, name '%s', ext '%s'\n",
path, alloc_name, alloc_ext, m.kmod, m.comp, m.name, m.ext);
TEST_ASSERT_VAL("wrong kmod", m.kmod == kmod);
TEST_ASSERT_VAL("wrong comp", m.comp == comp);
if (ext)
TEST_ASSERT_VAL("wrong ext", m.ext && !strcmp(ext, m.ext));
else
TEST_ASSERT_VAL("wrong ext", !m.ext);
if (name)
TEST_ASSERT_VAL("wrong name", m.name && !strcmp(name, m.name));
else
TEST_ASSERT_VAL("wrong name", !m.name);
free(m.name);
free(m.ext);
return 0;
}
int test__thread_map(int subtest __maybe_unused)
{
struct thread_map *map;
/* 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), "perf"));
TEST_ASSERT_VAL("wrong refcnt",
atomic_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",
atomic_read(&map->refcnt) == 1);
thread_map__put(map);
return 0;
}
static int detect_share(int wp_cnt, int bp_cnt)
{
struct perf_event_attr attr;
int i, fd[wp_cnt + bp_cnt], ret;
for (i = 0; i < wp_cnt; i++) {
fd[i] = wp_event((void *)&the_var, &attr);
TEST_ASSERT_VAL("failed to create wp\n", fd[i] != -1);
}
for (; i < (bp_cnt + wp_cnt); i++) {
fd[i] = bp_event((void *)test_function, &attr);
if (fd[i] == -1)
break;
}
ret = i != (bp_cnt + wp_cnt);
while (i--)
close(fd[i]);
return ret;
}
int test__thread_mg_share(void)
{
struct machines machines;
struct machine *machine;
/* thread group */
struct thread *leader;
struct thread *t1, *t2, *t3;
struct map_groups *mg;
/* other process */
struct thread *other, *other_leader;
struct map_groups *other_mg;
/*
* This test create 2 processes abstractions (struct thread)
* with several threads and checks they properly share and
* maintain map groups info (struct map_groups).
*
* thread group (pid: 0, tids: 0, 1, 2, 3)
* other group (pid: 4, tids: 4, 5)
*/
machines__init(&machines);
machine = &machines.host;
/* create process with 4 threads */
leader = machine__findnew_thread(machine, 0, 0);
t1 = machine__findnew_thread(machine, 0, 1);
t2 = machine__findnew_thread(machine, 0, 2);
t3 = machine__findnew_thread(machine, 0, 3);
/* and create 1 separated process, without thread leader */
other = machine__findnew_thread(machine, 4, 5);
TEST_ASSERT_VAL("failed to create threads",
leader && t1 && t2 && t3 && other);
mg = leader->mg;
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 4);
/* test the map groups pointer is shared */
TEST_ASSERT_VAL("map groups don't match", mg == t1->mg);
TEST_ASSERT_VAL("map groups don't match", mg == t2->mg);
TEST_ASSERT_VAL("map groups don't match", mg == t3->mg);
/*
* Verify the other leader was created by previous call.
* It should have shared map groups with no change in
* refcnt.
*/
other_leader = machine__find_thread(machine, 4, 4);
TEST_ASSERT_VAL("failed to find other leader", other_leader);
other_mg = other->mg;
TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 2);
TEST_ASSERT_VAL("map groups don't match", other_mg == other_leader->mg);
/* release thread group */
thread__delete(leader);
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 3);
thread__delete(t1);
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 2);
thread__delete(t2);
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 1);
thread__delete(t3);
/* release other group */
thread__delete(other_leader);
TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 1);
thread__delete(other);
/*
* Cannot call machine__delete_threads(machine) now,
* because we've already released all the threads.
*/
machines__exit(&machines);
return 0;
}
