Fix tests: NULL pointer dereference in ltt_session unit tests
[lttng-tools.git] / tests / unit / test_session.c
index cfbb52d048dd00820e6817a24dbe221a5a165716..cdb1bb88d7046cbe46218324db8031deddde00d1 100644 (file)
@@ -32,6 +32,7 @@
 #include <bin/lttng-sessiond/ust-app.h>
 #include <bin/lttng-sessiond/ht-cleanup.h>
 #include <bin/lttng-sessiond/health-sessiond.h>
+#include <bin/lttng-sessiond/thread.h>
 #include <common/sessiond-comm/sessiond-comm.h>
 #include <common/common.h>
 
@@ -45,7 +46,6 @@
 
 struct health_app *health_sessiond;
 static struct ltt_session_list *session_list;
-static pthread_t ht_cleanup_thread;
 
 /* For error.h */
 int lttng_opt_quiet = 1;
@@ -112,9 +112,11 @@ static void empty_session_list(void)
 {
        struct ltt_session *iter, *tmp;
 
+       session_lock_list();
        cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
                session_destroy(iter);
        }
+       session_unlock_list();
 
        /* Session list must be 0 */
        assert(!session_list_count());
@@ -126,27 +128,36 @@ static void empty_session_list(void)
 static int create_one_session(char *name)
 {
        int ret;
+       enum lttng_error_code ret_code;
+       struct ltt_session *session = NULL;
 
-       ret = session_create(name, geteuid(), getegid());
-       if (ret == LTTNG_OK) {
+       session_lock_list();
+       ret_code = session_create(name, geteuid(), getegid(), &session);
+       session_put(session);
+       if (ret_code == LTTNG_OK) {
                /* Validate */
                ret = find_session_name(name);
                if (ret < 0) {
                        /* Session not found by name */
                        printf("session not found after creation\n");
-                       return -1;
+                       ret = -1;
+                       goto end;
                } else {
                        /* Success */
-                       return 0;
+                       ret = 0;
+                       goto end;
                }
        } else {
-               if (ret == LTTNG_ERR_EXIST_SESS) {
+               if (ret_code == LTTNG_ERR_EXIST_SESS) {
                        printf("(session already exists) ");
                }
-               return -1;
+               ret = -1;
+               goto end;
        }
-
-       return 0;
+       ret = 0;
+end:
+       session_unlock_list();
+       return ret;
 }
 
 /*
@@ -160,19 +171,18 @@ static int destroy_one_session(struct ltt_session *session)
        strncpy(session_name, session->name, sizeof(session_name));
        session_name[sizeof(session_name) - 1] = '\0';
 
-       ret = session_destroy(session);
-       if (ret == LTTNG_OK) {
-               ret = find_session_name(session_name);
-               if (ret < 0) {
-                       /* Success, -1 means that the sesion is NOT found */
-                       return 0;
-               } else {
-                       /* Fail */
-                       return -1;
-               }
-       }
+       session_destroy(session);
+       session_put(session);
 
-       return 0;
+       ret = find_session_name(session_name);
+       if (ret < 0) {
+               /* Success, -1 means that the sesion is NOT found */
+               ret = 0;
+       } else {
+               /* Fail */
+               ret = -1;
+       }
+       return ret;
 }
 
 /*
@@ -187,17 +197,27 @@ static int two_session_same_name(void)
        ret = create_one_session(SESSION1);
        if (ret < 0) {
                /* Fail */
-               return -1;
+               ret = -1;
+               goto end;
        }
 
+       session_lock_list();
        sess = session_find_by_name(SESSION1);
        if (sess) {
                /* Success */
-               return 0;
+               session_put(sess);
+               session_unlock_list();
+               ret = 0;
+               goto end_unlock;
+       } else {
+               /* Fail */
+               ret = -1;
+               goto end_unlock;
        }
-
-       /* Fail */
-       return -1;
+end_unlock:
+       session_unlock_list();
+end:
+       return ret;
 }
 
 void test_session_list(void)
@@ -217,31 +237,46 @@ void test_validate_session(void)
 {
        struct ltt_session *tmp;
 
+       session_lock_list();
        tmp = session_find_by_name(SESSION1);
 
        ok(tmp != NULL,
           "Validating session: session found");
 
-       ok(tmp->kernel_session == NULL &&
-          strlen(tmp->name),
-          "Validating session: basic sanity check");
+       if (tmp) {
+               ok(tmp->kernel_session == NULL &&
+                  strlen(tmp->name),
+                  "Validating session: basic sanity check");
+       } else {
+               skip(1, "Skipping session validation check as session was not found");
+               goto end;
+       }
 
        session_lock(tmp);
        session_unlock(tmp);
+       session_put(tmp);
+end:
+       session_unlock_list();
 }
 
 void test_destroy_session(void)
 {
        struct ltt_session *tmp;
 
+       session_lock_list();
        tmp = session_find_by_name(SESSION1);
 
        ok(tmp != NULL,
           "Destroying session: session found");
 
-       ok(destroy_one_session(tmp) == 0,
-          "Destroying session: %s destroyed",
-          SESSION1);
+       if (tmp) {
+               ok(destroy_one_session(tmp) == 0,
+                  "Destroying session: %s destroyed",
+                  SESSION1);
+       } else {
+               skip(1, "Skipping session destruction as it was not found");
+       }
+       session_unlock_list();
 }
 
 void test_duplicate_session(void)
@@ -250,13 +285,29 @@ void test_duplicate_session(void)
           "Duplicate session creation");
 }
 
-void test_bogus_session_param(void)
+void test_session_name_generation(void)
 {
-       ok(create_one_session(NULL) < 0,
-          "Create session with bogus param: NULL should fail");
-
-       ok(session_list_count() == 0,
-          "Create session with bogus param: session list empty");
+       struct ltt_session *session = NULL;
+       enum lttng_error_code ret_code;
+       const char *expected_session_name_prefix = DEFAULT_SESSION_NAME;
+
+       session_lock_list();
+       ret_code = session_create(NULL, geteuid(), getegid(), &session);
+       ok(ret_code == LTTNG_OK,
+               "Create session with a NULL name (auto-generate a name)");
+       if (!session) {
+               skip(1, "Skipping session name generation tests as session_create() failed.");
+               goto end;
+       }
+       diag("Automatically-generated session name: %s", *session->name ?
+               session->name : "ERROR");
+       ok(*session->name && !strncmp(expected_session_name_prefix, session->name,
+                       sizeof(DEFAULT_SESSION_NAME) - 1),
+                       "Auto-generated session name starts with %s",
+                       DEFAULT_SESSION_NAME);
+end:
+       session_put(session);
+       session_unlock_list();
 }
 
 void test_large_session_number(void)
@@ -279,8 +330,10 @@ void test_large_session_number(void)
 
        failed = 0;
 
+       session_lock_list();
        for (i = 0; i < MAX_SESSIONS; i++) {
                cds_list_for_each_entry_safe(iter, tmp, &session_list->head, list) {
+                       assert(session_get(iter));
                        ret = destroy_one_session(iter);
                        if (ret < 0) {
                                diag("session %d destroy failed", i);
@@ -288,6 +341,7 @@ void test_large_session_number(void)
                        }
                }
        }
+       session_unlock_list();
 
        ok(failed == 0 && session_list_count() == 0,
           "Large sessions number: destroyed %u sessions",
@@ -296,10 +350,14 @@ void test_large_session_number(void)
 
 int main(int argc, char **argv)
 {
+       struct lttng_thread *ht_cleanup_thread;
+
        plan_tests(NUM_TESTS);
 
        health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
-       assert(!init_ht_cleanup_thread(&ht_cleanup_thread));
+       ht_cleanup_thread = launch_ht_cleanup_thread();
+       assert(ht_cleanup_thread);
+       lttng_thread_put(ht_cleanup_thread);
 
        diag("Sessions unit tests");
 
@@ -317,12 +375,12 @@ int main(int argc, char **argv)
 
        empty_session_list();
 
-       test_bogus_session_param();
+       test_session_name_generation();
 
        test_large_session_number();
 
        rcu_unregister_thread();
-       assert(!fini_ht_cleanup_thread(&ht_cleanup_thread));
+       lttng_thread_list_shutdown_orphans();
 
        return exit_status();
 }
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