ccan/ntdb: demote to junkcode.

[ccan] / junkcode / rusty@rustcorp.com.au-ntdb / test / failtest_helper.c

diff --git a/junkcode/rusty@rustcorp.com.au-ntdb/test/failtest_helper.c b/junkcode/rusty@rustcorp.com.au-ntdb/test/failtest_helper.c
new file mode 100644 (file)
index 0000000..ab7e61b
--- /dev/null
+++ b/junkcode/rusty@rustcorp.com.au-ntdb/test/failtest_helper.c
@@ -0,0 +1,90 @@
+#include "failtest_helper.h"
+#include "logging.h"
+#include <string.h>
+#include "tap-interface.h"
+
+bool failtest_suppress = false;
+
+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 bool is_nonblocking_lock(const struct failtest_call *call)
+{
+       return call->type == FAILTEST_FCNTL && call->u.fcntl.cmd == F_SETLK;
+}
+
+static bool is_unlock(const struct failtest_call *call)
+{
+       return call->type == FAILTEST_FCNTL
+               && call->u.fcntl.arg.fl.l_type == F_UNLCK;
+}
+
+bool exit_check_log(struct tlist_calls *history)
+{
+       const struct failtest_call *i;
+       unsigned int malloc_count = 0;
+
+       tlist_for_each(history, i, list) {
+               if (!i->fail)
+                       continue;
+               /* Failing the /dev/urandom open doesn't count: we fall back. */
+               if (failmatch(i, URANDOM_OPEN))
+                       continue;
+
+               /* Similarly with read fail. */
+               if (failmatch(i, URANDOM_READ))
+                       continue;
+
+               /* Initial allocation of ntdb doesn't log. */
+               if (i->type == FAILTEST_MALLOC) {
+                       if (malloc_count++ == 0) {
+                               continue;
+                       }
+               }
+
+               /* We don't block "failures" on non-blocking locks. */
+               if (is_nonblocking_lock(i))
+                       continue;
+
+               if (!tap_log_messages)
+                       diag("We didn't log for %s:%u", i->file, i->line);
+               return tap_log_messages != 0;
+       }
+       return true;
+}
+
+/* Some places we soldier on despite errors: only fail them once. */
+enum failtest_result
+block_repeat_failures(struct tlist_calls *history)
+{
+       const struct failtest_call *last;
+
+       last = tlist_tail(history, list);
+
+       if (failtest_suppress)
+               return FAIL_DONT_FAIL;
+
+       if (failmatch(last, URANDOM_OPEN)
+           || failmatch(last, URANDOM_READ)) {
+               return FAIL_PROBE;
+       }
+
+       /* 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;
+
+       /* Unlock or non-blocking lock is fail-once. */
+       if (is_unlock(last) || is_nonblocking_lock(last))
+               return FAIL_PROBE;
+
+       return FAIL_OK;
+}