tdb2: suppress failtest more than once on mmap.
[ccan] / ccan / tdb2 / test / failtest_helper.c
index 1358a6c6b261d3b296a296d123c36693afe07ff1..3172e3ad6e150478812c6b9e33434929ee147167 100644 (file)
@@ -3,6 +3,8 @@
 #include <string.h>
 #include <ccan/tap/tap.h>
 
+bool failtest_suppress = false;
+
 /* FIXME: From ccan/str */
 static inline bool strends(const char *str, const char *postfix)
 {
@@ -23,19 +25,6 @@ bool failmatch(const struct failtest_call *call,
                            == '/')));
 }
 
-static const struct failtest_call *
-find_repeat(const struct failtest_call *start, const struct failtest_call *end,
-           const struct failtest_call *call)
-{
-       const struct failtest_call *i;
-
-       for (i = start; i < end; i++) {
-               if (failmatch(i, call->file, call->line, call->type))
-                       return i;
-       }
-       return NULL;
-}
-
 static bool is_nonblocking_lock(const struct failtest_call *call)
 {
        return call->type == FAILTEST_FCNTL && call->u.fcntl.cmd == F_SETLK;
@@ -47,32 +36,31 @@ static bool is_unlock(const struct failtest_call *call)
                && call->u.fcntl.arg.fl.l_type == F_UNLCK;
 }
 
-bool exit_check_log(struct failtest_call *history, unsigned num)
+bool exit_check_log(struct tlist_calls *history)
 {
-       unsigned int i;
+       const struct failtest_call *i;
 
-       for (i = 0; i < num; i++) {
-               if (!history[i].fail)
+       tlist_for_each(history, i, list) {
+               if (!i->fail)
                        continue;
                /* Failing the /dev/urandom open doesn't count: we fall back. */
-               if (failmatch(&history[i], URANDOM_OPEN))
+               if (failmatch(i, URANDOM_OPEN))
                        continue;
 
                /* Similarly with read fail. */
-               if (failmatch(&history[i], URANDOM_READ))
+               if (failmatch(i, URANDOM_READ))
                        continue;
 
                /* Initial allocation of tdb doesn't log. */
-               if (failmatch(&history[i], INITIAL_TDB_MALLOC))
+               if (failmatch(i, INITIAL_TDB_MALLOC))
                        continue;
 
                /* We don't block "failures" on non-blocking locks. */
-               if (is_nonblocking_lock(&history[i]))
+               if (is_nonblocking_lock(i))
                        continue;
 
                if (!tap_log_messages)
-                       diag("We didn't log for %u (%s:%u)",
-                            i, history[i].file, history[i].line);
+                       diag("We didn't log for %s:%u", i->file, i->line);
                return tap_log_messages != 0;
        }
        return true;
@@ -80,38 +68,29 @@ bool exit_check_log(struct failtest_call *history, unsigned num)
 
 /* Some places we soldier on despite errors: only fail them once. */
 enum failtest_result
-block_repeat_failures(struct failtest_call *history, unsigned num)
+block_repeat_failures(struct tlist_calls *history)
 {
-       const struct failtest_call *i, *last = &history[num-1];
+       const struct failtest_call *last;
+
+       last = tlist_tail(history, struct failtest_call, list);
+
+       if (failtest_suppress)
+               return FAIL_DONT_FAIL;
 
        if (failmatch(last, INITIAL_TDB_MALLOC)
            || failmatch(last, URANDOM_OPEN)
            || failmatch(last, URANDOM_READ)) {
-               if (find_repeat(history, last, last))
-                       return FAIL_DONT_FAIL;
                return FAIL_PROBE;
        }
 
-       /* Unlock or non-blocking lock is fail-once. */
-       if (is_unlock(last)) {
-               /* Find a previous unlock at this point? */
-               for (i = find_repeat(history, last, last);
-                    i;
-                    i = find_repeat(history, i, last)) {
-                       if (is_unlock(i))
-                               return FAIL_DONT_FAIL;
-               }
+       /* We handle mmap failing, by falling back to read/write, so
+        * don't try all possible paths. */
+       if (last->type == FAILTEST_MMAP)
                return FAIL_PROBE;
-       } else if (is_nonblocking_lock(last)) {
-               /* Find a previous non-blocking lock at this point? */
-               for (i = find_repeat(history, last, last);
-                    i;
-                    i = find_repeat(history, i, last)) {
-                       if (is_nonblocking_lock(i))
-                               return FAIL_DONT_FAIL;
-               }
+
+       /* Unlock or non-blocking lock is fail-once. */
+       if (is_unlock(last) || is_nonblocking_lock(last))
                return FAIL_PROBE;
-       }
 
        return FAIL_OK;
 }