tdb2: rework lock.c functions to return enum TDB_ERROR.

[ccan] / ccan / tdb2 / test / run-01-new_database.c

diff --git a/ccan/tdb2/test/run-01-new_database.c b/ccan/tdb2/test/run-01-new_database.c
index ea385b60e325dbcd54eccf742c62f373509cc62f..49f2580b7acc8f814b874e0e2de6398888b3c21e 100644 (file)
--- a/ccan/tdb2/test/run-01-new_database.c
+++ b/ccan/tdb2/test/run-01-new_database.c
@@ -1,3 +1,4 @@
+#include <ccan/failtest/failtest_override.h>
 #include <ccan/tdb2/tdb.c>
 #include <ccan/tdb2/free.c>
 #include <ccan/tdb2/lock.c>
@@ -6,8 +7,115 @@
 #include <ccan/tdb2/transaction.c>
 #include <ccan/tdb2/check.c>
 #include <ccan/tap/tap.h>
+#include <ccan/failtest/failtest.h>
 #include "logging.h"
 
+/* FIXME: Check these! */
+#define INITIAL_TDB_MALLOC     "tdb.c", 178, FAILTEST_MALLOC
+#define LOGGING_MALLOC         "tdb.c", 734, FAILTEST_MALLOC
+#define URANDOM_OPEN           "tdb.c", 49, FAILTEST_OPEN
+#define URANDOM_READ           "tdb.c", 29, FAILTEST_READ
+
+static bool failmatch(const struct failtest_call *call,
+                     const char *file, int line, enum failtest_call_type type)
+{
+       return call->type == type
+               && call->line == line
+               && ((strcmp(call->file, file) == 0)
+                   || (strends(call->file, file)
+                       && (call->file[strlen(call->file) - strlen(file) - 1]
+                           == '/')));
+}
+
+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;
+}
+
+/* Some places we soldier on despite errors: only fail them once. */
+static enum failtest_result
+block_repeat_failures(struct failtest_call *history, unsigned num)
+{
+       const struct failtest_call *i, *last = &history[num-1];
+
+       if (failmatch(last, INITIAL_TDB_MALLOC)
+           || failmatch(last, LOGGING_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 (last->type == FAILTEST_FCNTL
+           && last->u.fcntl.arg.fl.l_type == F_UNLCK) {
+               /* Find a previous unlock at this point? */
+               for (i = find_repeat(history, last, last);
+                    i;
+                    i = find_repeat(history, i, last)) {
+                       if (i->u.fcntl.arg.fl.l_type == F_UNLCK)
+                               return FAIL_DONT_FAIL;
+               }
+               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;
+               }
+               return FAIL_PROBE;
+       }
+
+       return FAIL_OK;
+}
+
+static bool exit_check(struct failtest_call *history, unsigned num)
+{
+       unsigned int i;
+
+       for (i = 0; i < num; i++) {
+               if (!history[i].fail)
+                       continue;
+               /* Failing the /dev/urandom open doesn't count: we fall back. */
+               if (failmatch(&history[i], URANDOM_OPEN))
+                       continue;
+
+               /* Similarly with read fail. */
+               if (failmatch(&history[i], URANDOM_READ))
+                       continue;
+
+               /* Initial allocation of tdb doesn't log. */
+               if (failmatch(&history[i], INITIAL_TDB_MALLOC))
+                       continue;
+
+               /* We don't block "failures" on non-blocking locks. */
+               if (is_nonblocking_lock(&history[i]))
+                       continue;
+
+               if (!tap_log_messages)
+                       diag("We didn't log for %u (%s:%u)",
+                            i, history[i].file, history[i].line);
+               return tap_log_messages != 0;
+       }
+       return true;
+}
+
 int main(int argc, char *argv[])
 {
        unsigned int i;
@@ -16,16 +124,23 @@ int main(int argc, char *argv[])
                        TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT, 
                        TDB_NOMMAP|TDB_CONVERT };
 
-       plan_tests(sizeof(flags) / sizeof(flags[0]) * 2 + 1);
+       failtest_init(argc, argv);
+       failtest_hook = block_repeat_failures;
+       failtest_exit_check = exit_check;
+       plan_tests(sizeof(flags) / sizeof(flags[0]) * 3);
        for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
                tdb = tdb_open("run-new_database.tdb", flags[i],
                               O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
-               ok1(tdb);
+               if (!ok1(tdb))
+                       failtest_exit(exit_status());
                if (tdb) {
-                       ok1(tdb_check(tdb, NULL, NULL) == 0);
+                       bool ok = ok1(tdb_check(tdb, NULL, NULL) == 0);
                        tdb_close(tdb);
+                       if (!ok)
+                               failtest_exit(exit_status());
                }
+               if (!ok1(tap_log_messages == 0))
+                       break;
        }
-       ok1(tap_log_messages == 0);
-       return exit_status();
+       failtest_exit(exit_status());
 }