commit 7a0ff5beb21e6485bda44c0545036bb2883f643d Author: Nick Mathewson nickm@torproject.org Date: Thu Sep 13 20:47:41 2018 -0400
In conditionvar_timeout test, wait for threads to timeout
Previously we just waited 200msec, which was not enough on slow/busy systems.
Fixes bug 27073; bugfix on 0.2.6.3-alpha when the test was introduced. --- changes/bug27073 | 4 ++++ src/test/test_threads.c | 30 +++++++++++++++++++----------- 2 files changed, 23 insertions(+), 11 deletions(-)
diff --git a/changes/bug27073 b/changes/bug27073 new file mode 100644 index 000000000..851e7f0df --- /dev/null +++ b/changes/bug27073 @@ -0,0 +1,4 @@ + o Minor bugfixes (testing): + - Revise the "conditionvar_timeout" test so that it succeeds even + on heavily loaded systems where the test threads are not scheduled + within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha. diff --git a/src/test/test_threads.c b/src/test/test_threads.c index ebbc95c7c..448ab2034 100644 --- a/src/test/test_threads.c +++ b/src/test/test_threads.c @@ -234,25 +234,33 @@ test_threads_conditionvar(void *arg) if (timeout) { ti->tv = &msec100; } + +#define SPIN_UNTIL(condition,sleep_msec) \ + while (1) { \ + tor_mutex_acquire(ti->mutex); \ + if (condition) { \ + break; \ + } \ + tor_mutex_release(ti->mutex); \ + tor_sleep_msec(sleep_msec); \ + } + spawn_func(cv_test_thr_fn_, ti); spawn_func(cv_test_thr_fn_, ti); spawn_func(cv_test_thr_fn_, ti); spawn_func(cv_test_thr_fn_, ti);
- tor_mutex_acquire(ti->mutex); + SPIN_UNTIL(ti->n_threads == 4, 10); + + time_t started_at = time(NULL); + ti->addend = 7; ti->shutdown = 1; tor_cond_signal_one(ti->cond); tor_mutex_release(ti->mutex);
#define SPIN() \ - while (1) { \ - tor_mutex_acquire(ti->mutex); \ - if (ti->addend == 0) { \ - break; \ - } \ - tor_mutex_release(ti->mutex); \ - } + SPIN_UNTIL(ti->addend == 0, 0)
SPIN();
@@ -279,8 +287,9 @@ test_threads_conditionvar(void *arg) if (!timeout) { tt_int_op(ti->n_shutdown, ==, 4); } else { - tor_sleep_msec(200); - tor_mutex_acquire(ti->mutex); + const int GIVE_UP_AFTER_SEC = 30; + SPIN_UNTIL((ti->n_timeouts == 2 || + time(NULL) >= started_at + GIVE_UP_AFTER_SEC), 10); tt_int_op(ti->n_shutdown, ==, 2); tt_int_op(ti->n_timeouts, ==, 2); tor_mutex_release(ti->mutex); @@ -301,4 +310,3 @@ struct testcase_t thread_tests[] = { &passthrough_setup, (void*)"tv" }, END_OF_TESTCASES }; -