Merge remote-tracking branch 'tor-github/pr/776' into maint-0.4.0

This commit is contained in:
Nick Mathewson 2019-03-12 11:03:37 -04:00
commit 9c9214f2c9
7 changed files with 290 additions and 35 deletions

4
changes/bug29706_minimal Normal file
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@ -0,0 +1,4 @@
o Minor bugfixes (memory management, testing):
- Stop leaking parts of the shared random state in the shared-random unit
tests. The previous fix in 29599 was incomplete.
Fixes bug 29706; bugfix on 0.2.9.1-alpha.

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@ -0,0 +1,4 @@
o Minor bugfixes (memory management):
- Refactor the shared random state's memory management so that it actually
takes ownership of the shared random value pointers.
Fixes bug 29706; bugfix on 0.2.9.1-alpha.

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@ -120,8 +120,8 @@ static const char sr_flag_ns_str[] = "shared-rand-participate";
static int32_t num_srv_agreements_from_vote;
/* Return a heap allocated copy of the SRV <b>orig</b>. */
STATIC sr_srv_t *
srv_dup(const sr_srv_t *orig)
sr_srv_t *
sr_srv_dup(const sr_srv_t *orig)
{
sr_srv_t *duplicate = NULL;
@ -1253,8 +1253,8 @@ sr_act_post_consensus(const networkstatus_t *consensus)
* decided by the majority. */
sr_state_unset_fresh_srv();
/* Set the SR values from the given consensus. */
sr_state_set_previous_srv(srv_dup(consensus->sr_info.previous_srv));
sr_state_set_current_srv(srv_dup(consensus->sr_info.current_srv));
sr_state_set_previous_srv(sr_srv_dup(consensus->sr_info.previous_srv));
sr_state_set_current_srv(sr_srv_dup(consensus->sr_info.current_srv));
}
/* Prepare our state so that it's ready for the next voting period. */

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@ -154,6 +154,7 @@ const char *sr_commit_get_rsa_fpr(const sr_commit_t *commit)
void sr_compute_srv(void);
sr_commit_t *sr_generate_our_commit(time_t timestamp,
const authority_cert_t *my_rsa_cert);
sr_srv_t *sr_srv_dup(const sr_srv_t *orig);
#ifdef SHARED_RANDOM_PRIVATE
@ -172,7 +173,6 @@ STATIC sr_srv_t *get_majority_srv_from_votes(const smartlist_t *votes,
int current);
STATIC void save_commit_to_state(sr_commit_t *commit);
STATIC sr_srv_t *srv_dup(const sr_srv_t *orig);
STATIC int commitments_are_the_same(const sr_commit_t *commit_one,
const sr_commit_t *commit_two);
STATIC int commit_is_authoritative(const sr_commit_t *commit,

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@ -102,6 +102,8 @@ static const config_format_t state_format = {
&state_extra_var,
};
static void state_query_del_(sr_state_object_t obj_type, void *data);
/* Return a string representation of a protocol phase. */
STATIC const char *
get_phase_str(sr_phase_t phase)
@ -834,6 +836,9 @@ state_query_get_commit(const char *rsa_fpr)
static void *
state_query_get_(sr_state_object_t obj_type, const void *data)
{
if (BUG(!sr_state))
return NULL;
void *obj = NULL;
switch (obj_type) {
@ -862,23 +867,44 @@ state_query_get_(sr_state_object_t obj_type, const void *data)
}
/* Helper function: This handles the PUT state action using an
* <b>obj_type</b> and <b>data</b> needed for the action. */
* <b>obj_type</b> and <b>data</b> needed for the action.
* PUT frees the previous data before replacing it, if needed. */
static void
state_query_put_(sr_state_object_t obj_type, void *data)
{
if (BUG(!sr_state))
return;
switch (obj_type) {
case SR_STATE_OBJ_COMMIT:
{
sr_commit_t *commit = data;
tor_assert(commit);
/* commit_add_to_state() frees the old commit, if there is one */
commit_add_to_state(commit, sr_state);
break;
}
case SR_STATE_OBJ_CURSRV:
sr_state->current_srv = (sr_srv_t *) data;
/* Check if the new pointer is the same as the old one: if it is, it's
* probably a bug. The caller may have confused current and previous,
* or they may have forgotten to sr_srv_dup().
* Putting NULL multiple times is allowed. */
if (!BUG(data && sr_state->current_srv == (sr_srv_t *) data)) {
/* We own the old SRV, so we need to free it. */
state_query_del_(SR_STATE_OBJ_CURSRV, NULL);
sr_state->current_srv = (sr_srv_t *) data;
}
break;
case SR_STATE_OBJ_PREVSRV:
sr_state->previous_srv = (sr_srv_t *) data;
/* Check if the new pointer is the same as the old one: if it is, it's
* probably a bug. The caller may have confused current and previous,
* or they may have forgotten to sr_srv_dup().
* Putting NULL multiple times is allowed. */
if (!BUG(data && sr_state->previous_srv == (sr_srv_t *) data)) {
/* We own the old SRV, so we need to free it. */
state_query_del_(SR_STATE_OBJ_PREVSRV, NULL);
sr_state->previous_srv = (sr_srv_t *) data;
}
break;
case SR_STATE_OBJ_VALID_AFTER:
sr_state->valid_after = *((time_t *) data);
@ -898,6 +924,9 @@ state_query_put_(sr_state_object_t obj_type, void *data)
static void
state_query_del_all_(sr_state_object_t obj_type)
{
if (BUG(!sr_state))
return;
switch (obj_type) {
case SR_STATE_OBJ_COMMIT:
{
@ -926,6 +955,9 @@ state_query_del_(sr_state_object_t obj_type, void *data)
{
(void) data;
if (BUG(!sr_state))
return;
switch (obj_type) {
case SR_STATE_OBJ_PREVSRV:
tor_free(sr_state->previous_srv);
@ -986,7 +1018,7 @@ state_query(sr_state_action_t action, sr_state_object_t obj_type,
/* Delete the current SRV value from the state freeing it and the value is set
* to NULL meaning empty. */
static void
STATIC void
state_del_current_srv(void)
{
state_query(SR_STATE_ACTION_DEL, SR_STATE_OBJ_CURSRV, NULL, NULL);
@ -994,22 +1026,22 @@ state_del_current_srv(void)
/* Delete the previous SRV value from the state freeing it and the value is
* set to NULL meaning empty. */
static void
STATIC void
state_del_previous_srv(void)
{
state_query(SR_STATE_ACTION_DEL, SR_STATE_OBJ_PREVSRV, NULL, NULL);
}
/* Rotate SRV value by freeing the previous value, assigning the current
* value to the previous one and nullifying the current one. */
/* Rotate SRV value by setting the previous SRV to the current SRV, and
* clearing the current SRV. */
STATIC void
state_rotate_srv(void)
{
/* First delete previous SRV from the state. Object will be freed. */
state_del_previous_srv();
/* Set previous SRV with the current one. */
sr_state_set_previous_srv(sr_state_get_current_srv());
/* Nullify the current srv. */
/* Set previous SRV to a copy of the current one. */
sr_state_set_previous_srv(sr_srv_dup(sr_state_get_current_srv()));
/* Free and NULL the current srv. */
sr_state_set_current_srv(NULL);
}
@ -1030,7 +1062,9 @@ sr_state_get_phase(void)
return *(sr_phase_t *) ptr;
}
/* Return the previous SRV value from our state. Value CAN be NULL. */
/* Return the previous SRV value from our state. Value CAN be NULL.
* The state object owns the SRV, so the calling code should not free the SRV.
* Use sr_srv_dup() if you want to keep a copy of the SRV. */
const sr_srv_t *
sr_state_get_previous_srv(void)
{
@ -1049,7 +1083,9 @@ sr_state_set_previous_srv(const sr_srv_t *srv)
NULL);
}
/* Return the current SRV value from our state. Value CAN be NULL. */
/* Return the current SRV value from our state. Value CAN be NULL.
* The state object owns the SRV, so the calling code should not free the SRV.
* Use sr_srv_dup() if you want to keep a copy of the SRV. */
const sr_srv_t *
sr_state_get_current_srv(void)
{

View File

@ -140,6 +140,8 @@ STATIC int is_phase_transition(sr_phase_t next_phase);
STATIC void set_sr_phase(sr_phase_t phase);
STATIC sr_state_t *get_sr_state(void);
STATIC void state_del_previous_srv(void);
STATIC void state_del_current_srv(void);
#endif /* defined(TOR_UNIT_TESTS) */

View File

@ -58,7 +58,8 @@ trusteddirserver_get_by_v3_auth_digest_m(const char *digest)
}
/* Setup a minimal dirauth environment by initializing the SR state and
* making sure the options are set to be an authority directory. */
* making sure the options are set to be an authority directory.
* You must only call this function once per process. */
static void
init_authority_state(void)
{
@ -595,7 +596,9 @@ test_encoding(void *arg)
/** Setup some SRVs in our SR state. If <b>also_current</b> is set, then set
* both current and previous SRVs.
* Helper of test_vote() and test_sr_compute_srv(). */
* Helper of test_vote() and test_sr_compute_srv().
* You must call sr_state_free_all() to free the state at the end of each test
* function (on pass or fail). */
static void
test_sr_setup_srv(int also_current)
{
@ -605,6 +608,8 @@ test_sr_setup_srv(int also_current)
"ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ",
sizeof(srv->value));
/* sr_state_set_previous_srv() does not free() the old previous srv. */
state_del_previous_srv();
sr_state_set_previous_srv(srv);
if (also_current) {
@ -614,6 +619,8 @@ test_sr_setup_srv(int also_current)
"NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN",
sizeof(srv->value));
/* sr_state_set_previous_srv() does not free() the old current srv. */
state_del_current_srv();
sr_state_set_current_srv(srv);
}
}
@ -1069,12 +1076,13 @@ test_sr_get_majority_srv_from_votes(void *arg)
smartlist_free(votes);
}
/* Test utils that don't depend on authority state */
static void
test_utils(void *arg)
test_utils_general(void *arg)
{
(void) arg;
/* Testing srv_dup(). */
/* Testing sr_srv_dup(). */
{
sr_srv_t *srv = NULL, *dup_srv = NULL;
const char *srv_value =
@ -1082,7 +1090,7 @@ test_utils(void *arg)
srv = tor_malloc_zero(sizeof(*srv));
srv->num_reveals = 42;
memcpy(srv->value, srv_value, sizeof(srv->value));
dup_srv = srv_dup(srv);
dup_srv = sr_srv_dup(srv);
tt_assert(dup_srv);
tt_u64_op(dup_srv->num_reveals, OP_EQ, srv->num_reveals);
tt_mem_op(dup_srv->value, OP_EQ, srv->value, sizeof(srv->value));
@ -1133,9 +1141,19 @@ test_utils(void *arg)
tt_str_op(get_phase_str(SR_PHASE_COMMIT), OP_EQ, "commit");
}
done:
return;
}
/* Test utils that depend on authority state */
static void
test_utils_auth(void *arg)
{
(void)arg;
init_authority_state();
/* Testing phase transition */
{
init_authority_state();
set_sr_phase(SR_PHASE_COMMIT);
tt_int_op(is_phase_transition(SR_PHASE_REVEAL), OP_EQ, 1);
tt_int_op(is_phase_transition(SR_PHASE_COMMIT), OP_EQ, 0);
@ -1146,8 +1164,193 @@ test_utils(void *arg)
tt_int_op(is_phase_transition(42), OP_EQ, 1);
}
/* Testing get, set, delete, clean SRVs */
{
/* Just set the previous SRV */
test_sr_setup_srv(0);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
state_del_previous_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
}
{
/* Delete the SRVs one at a time */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
state_del_current_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
state_del_previous_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
/* And in the opposite order */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
state_del_previous_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
state_del_current_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
/* And both at once */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_clean_srvs();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
/* And do the gets and sets multiple times */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
state_del_previous_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
state_del_previous_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_clean_srvs();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
state_del_current_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
sr_state_clean_srvs();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
state_del_current_srv();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
}
{
/* Now set the SRVs to NULL instead */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_set_current_srv(NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
sr_state_set_previous_srv(NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
/* And in the opposite order */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_set_previous_srv(NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_set_current_srv(NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
/* And both at once */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_clean_srvs();
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
/* And do the gets and sets multiple times */
test_sr_setup_srv(1);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_set_previous_srv(NULL);
sr_state_set_previous_srv(NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
sr_state_set_current_srv(NULL);
sr_state_set_previous_srv(NULL);
sr_state_set_current_srv(NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_EQ, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
}
{
/* Now copy the values across */
test_sr_setup_srv(1);
/* Check that the pointers are non-NULL, and different from each other */
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv());
/* Check that the content is different */
tt_mem_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv(), sizeof(sr_srv_t));
/* Set the current to the previous: the protocol goes the other way */
sr_state_set_current_srv(sr_srv_dup(sr_state_get_previous_srv()));
/* Check that the pointers are non-NULL, and different from each other */
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv());
/* Check that the content is the same */
tt_mem_op(sr_state_get_previous_srv(), OP_EQ,
sr_state_get_current_srv(), sizeof(sr_srv_t));
}
{
/* Now copy a value onto itself */
test_sr_setup_srv(1);
/* Check that the pointers are non-NULL, and different from each other */
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv());
/* Take a copy of the old value */
sr_srv_t old_current_srv;
memcpy(&old_current_srv, sr_state_get_current_srv(), sizeof(sr_srv_t));
/* Check that the content is different */
tt_mem_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv(), sizeof(sr_srv_t));
/* Set the current to the current: the protocol never replaces an SRV with
* the same value */
sr_state_set_current_srv(sr_srv_dup(sr_state_get_current_srv()));
/* Check that the pointers are non-NULL, and different from each other */
tt_ptr_op(sr_state_get_previous_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_current_srv(), OP_NE, NULL);
tt_ptr_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv());
/* Check that the content is different between current and previous */
tt_mem_op(sr_state_get_previous_srv(), OP_NE,
sr_state_get_current_srv(), sizeof(sr_srv_t));
/* Check that the content is the same as the old content */
tt_mem_op(&old_current_srv, OP_EQ,
sr_state_get_current_srv(), sizeof(sr_srv_t));
}
/* I don't think we can say "expect a BUG()" in our tests. */
#if 0
{
/* Now copy a value onto itself without sr_srv_dup().
* This should fail with a BUG() warning. */
test_sr_setup_srv(1);
sr_state_set_current_srv(sr_state_get_current_srv());
sr_state_set_previous_srv(sr_state_get_previous_srv());
}
#endif
done:
return;
sr_state_free_all();
}
static void
@ -1155,6 +1358,7 @@ test_state_transition(void *arg)
{
sr_state_t *state = NULL;
time_t now = time(NULL);
sr_srv_t *cur = NULL;
(void) arg;
@ -1193,44 +1397,47 @@ test_state_transition(void *arg)
/* Test SRV rotation in our state. */
{
const sr_srv_t *cur, *prev;
test_sr_setup_srv(1);
cur = sr_state_get_current_srv();
tt_assert(sr_state_get_current_srv());
/* Take a copy of the data, because the state owns the pointer */
cur = sr_srv_dup(sr_state_get_current_srv());
tt_assert(cur);
/* After, current srv should be the previous and then set to NULL. */
/* After, the previous SRV should be the same as the old current SRV, and
* the current SRV should be set to NULL */
state_rotate_srv();
prev = sr_state_get_previous_srv();
tt_assert(prev == cur);
tt_mem_op(sr_state_get_previous_srv(), OP_EQ, cur, sizeof(sr_srv_t));
tt_ptr_op(sr_state_get_current_srv(), OP_EQ, NULL);
sr_state_clean_srvs();
tor_free(cur);
}
/* New protocol run. */
{
const sr_srv_t *cur;
/* Setup some new SRVs so we can confirm that a new protocol run
* actually makes them rotate and compute new ones. */
test_sr_setup_srv(1);
cur = sr_state_get_current_srv();
tt_assert(cur);
tt_assert(sr_state_get_current_srv());
/* Take a copy of the data, because the state owns the pointer */
cur = sr_srv_dup(sr_state_get_current_srv());
set_sr_phase(SR_PHASE_REVEAL);
MOCK(get_my_v3_authority_cert, get_my_v3_authority_cert_m);
new_protocol_run(now);
UNMOCK(get_my_v3_authority_cert);
/* Rotation happened. */
tt_assert(sr_state_get_previous_srv() == cur);
tt_mem_op(sr_state_get_previous_srv(), OP_EQ, cur, sizeof(sr_srv_t));
/* We are going into COMMIT phase so we had to rotate our SRVs. Usually
* our current SRV would be NULL but a new protocol run should make us
* compute a new SRV. */
tt_assert(sr_state_get_current_srv());
/* Also, make sure we did change the current. */
tt_assert(sr_state_get_current_srv() != cur);
tt_mem_op(sr_state_get_current_srv(), OP_NE, cur, sizeof(sr_srv_t));
/* We should have our commitment alone. */
tt_int_op(digestmap_size(state->commits), OP_EQ, 1);
tt_int_op(state->n_reveal_rounds, OP_EQ, 0);
tt_int_op(state->n_commit_rounds, OP_EQ, 0);
/* 46 here since we were at 45 just before. */
tt_u64_op(state->n_protocol_runs, OP_EQ, 46);
tor_free(cur);
}
/* Cleanup of SRVs. */
@ -1241,6 +1448,7 @@ test_state_transition(void *arg)
}
done:
tor_free(cur);
sr_state_free_all();
}
@ -1436,7 +1644,8 @@ struct testcase_t sr_tests[] = {
{ "sr_compute_srv", test_sr_compute_srv, TT_FORK, NULL, NULL },
{ "sr_get_majority_srv_from_votes", test_sr_get_majority_srv_from_votes,
TT_FORK, NULL, NULL },
{ "utils", test_utils, TT_FORK, NULL, NULL },
{ "utils_general", test_utils_general, TT_FORK, NULL, NULL },
{ "utils_auth", test_utils_auth, TT_FORK, NULL, NULL },
{ "state_transition", test_state_transition, TT_FORK, NULL, NULL },
{ "state_update", test_state_update, TT_FORK,
NULL, NULL },