--- /dev/null
+#include "ntdb-source.h"
+#include "tap-interface.h"
+#include "logging.h"
+
+/* The largest 32-bit value which is still a multiple of NTDB_PGSIZE */
+#define ALMOST_4G ((uint32_t)-NTDB_PGSIZE)
+/* And this pushes it over 32 bits */
+#define A_LITTLE_BIT (NTDB_PGSIZE * 2)
+
+int main(int argc, char *argv[])
+{
+ unsigned int i;
+ struct ntdb_context *ntdb;
+ int flags[] = { NTDB_DEFAULT, NTDB_NOMMAP,
+ NTDB_CONVERT,
+ NTDB_NOMMAP|NTDB_CONVERT };
+
+ if (sizeof(off_t) <= 4) {
+ plan_tests(1);
+ pass("No 64 bit off_t");
+ return exit_status();
+ }
+
+ plan_tests(sizeof(flags) / sizeof(flags[0]) * 16);
+ for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+ off_t old_size;
+ NTDB_DATA k, d;
+ struct hash_info h;
+ struct ntdb_used_record rec;
+ ntdb_off_t off;
+
+ ntdb = ntdb_open("run-64-bit-ntdb.ntdb", flags[i]|MAYBE_NOSYNC,
+ O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
+ ok1(ntdb);
+ if (!ntdb)
+ continue;
+
+ old_size = ntdb->file->map_size;
+
+ /* Add a fake record to chew up the existing free space. */
+ k = ntdb_mkdata("fake", 4);
+ d.dsize = ntdb->file->map_size
+ - NEW_DATABASE_HDR_SIZE(ntdb->hash_bits) - 8;
+ d.dptr = malloc(d.dsize);
+ memset(d.dptr, 0, d.dsize);
+ ok1(ntdb_store(ntdb, k, d, NTDB_INSERT) == 0);
+ ok1(ntdb->file->map_size == old_size);
+ free(d.dptr);
+
+ /* This makes a sparse file */
+ ok1(ftruncate(ntdb->file->fd, ALMOST_4G) == 0);
+ ok1(add_free_record(ntdb, old_size, ALMOST_4G - old_size,
+ NTDB_LOCK_WAIT, false) == NTDB_SUCCESS);
+
+ /* Now add a little record past the 4G barrier. */
+ ok1(ntdb_expand_file(ntdb, A_LITTLE_BIT) == NTDB_SUCCESS);
+ ok1(add_free_record(ntdb, ALMOST_4G, A_LITTLE_BIT,
+ NTDB_LOCK_WAIT, false)
+ == NTDB_SUCCESS);
+
+ ok1(ntdb_check(ntdb, NULL, NULL) == NTDB_SUCCESS);
+
+ /* Test allocation path. */
+ k = ntdb_mkdata("key", 4);
+ d = ntdb_mkdata("data", 5);
+ ok1(ntdb_store(ntdb, k, d, NTDB_INSERT) == 0);
+ ok1(ntdb_check(ntdb, NULL, NULL) == NTDB_SUCCESS);
+
+ /* Make sure it put it at end as we expected. */
+ off = find_and_lock(ntdb, k, F_RDLCK, &h, &rec, NULL);
+ ok1(off >= ALMOST_4G);
+ ntdb_unlock_hash(ntdb, h.h, F_RDLCK);
+
+ ok1(ntdb_fetch(ntdb, k, &d) == 0);
+ ok1(d.dsize == 5);
+ ok1(strcmp((char *)d.dptr, "data") == 0);
+ free(d.dptr);
+
+ ok1(ntdb_delete(ntdb, k) == 0);
+ ok1(ntdb_check(ntdb, NULL, NULL) == NTDB_SUCCESS);
+
+ ntdb_close(ntdb);
+ }
+
+ /* We might get messages about mmap failing, so don't test
+ * tap_log_messages */
+ return exit_status();
+}