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-rw-r--r--test/run-corrupt.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/test/run-corrupt.c b/test/run-corrupt.c
new file mode 100644
index 0000000..e6fc751
--- /dev/null
+++ b/test/run-corrupt.c
@@ -0,0 +1,132 @@
+#include "../common/tdb_private.h"
+#include "../common/io.c"
+#include "../common/tdb.c"
+#include "../common/lock.c"
+#include "../common/freelist.c"
+#include "../common/traverse.c"
+#include "../common/transaction.c"
+#include "../common/error.c"
+#include "../common/open.c"
+#include "../common/check.c"
+#include "../common/hash.c"
+#include "../common/mutex.c"
+#include "tap-interface.h"
+#include <stdlib.h>
+#include "logging.h"
+
+static int check(TDB_DATA key, TDB_DATA data, void *private)
+{
+ unsigned int *sizes = private;
+
+ if (key.dsize > strlen("hello"))
+ return -1;
+ if (memcmp(key.dptr, "hello", key.dsize) != 0)
+ return -1;
+
+ if (data.dsize != strlen("world"))
+ return -1;
+ if (memcmp(data.dptr, "world", data.dsize) != 0)
+ return -1;
+
+ sizes[0] += key.dsize;
+ sizes[1] += data.dsize;
+ return 0;
+}
+
+static void tdb_flip_bit(struct tdb_context *tdb, unsigned int bit)
+{
+ unsigned int off = bit / CHAR_BIT;
+ unsigned char mask = (1 << (bit % CHAR_BIT));
+
+ if (tdb->map_ptr)
+ ((unsigned char *)tdb->map_ptr)[off] ^= mask;
+ else {
+ unsigned char c;
+ if (pread(tdb->fd, &c, 1, off) != 1) {
+ fprintf(stderr, "pread: %s\n", strerror(errno));
+ exit(1);
+ }
+ c ^= mask;
+ if (pwrite(tdb->fd, &c, 1, off) != 1) {
+ fprintf(stderr, "pwrite: %s\n", strerror(errno));
+ exit(1);
+ }
+ }
+}
+
+static void check_test(struct tdb_context *tdb)
+{
+ TDB_DATA key, data;
+ unsigned int i, verifiable, corrupt, sizes[2], dsize, ksize;
+
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ key.dptr = discard_const_p(uint8_t, "hello");
+ data.dsize = strlen("world");
+ data.dptr = discard_const_p(uint8_t, "world");
+
+ /* Key and data size respectively. */
+ dsize = ksize = 0;
+
+ /* 5 keys in hash size 2 means we'll have multichains. */
+ for (key.dsize = 1; key.dsize <= 5; key.dsize++) {
+ ksize += key.dsize;
+ dsize += data.dsize;
+ if (tdb_store(tdb, key, data, TDB_INSERT) != 0)
+ abort();
+ }
+
+ /* This is how many bytes we expect to be verifiable. */
+ /* From the file header. */
+ verifiable = strlen(TDB_MAGIC_FOOD) + 1
+ + 2 * sizeof(uint32_t) + 2 * sizeof(tdb_off_t)
+ + 2 * sizeof(uint32_t);
+ /* From the free list chain and hash chains. */
+ verifiable += 3 * sizeof(tdb_off_t);
+ /* From the record headers & tailer */
+ verifiable += 5 * (sizeof(struct tdb_record) + sizeof(uint32_t));
+ /* The free block: we ignore datalen, keylen, full_hash. */
+ verifiable += sizeof(struct tdb_record) - 3*sizeof(uint32_t) +
+ sizeof(uint32_t);
+ /* Our check function verifies the key and data. */
+ verifiable += ksize + dsize;
+
+ /* Flip one bit at a time, make sure it detects verifiable bytes. */
+ for (i = 0, corrupt = 0; i < tdb->map_size * CHAR_BIT; i++) {
+ tdb_flip_bit(tdb, i);
+ memset(sizes, 0, sizeof(sizes));
+ if (tdb_check(tdb, check, sizes) != 0)
+ corrupt++;
+ else if (sizes[0] != ksize || sizes[1] != dsize)
+ corrupt++;
+ tdb_flip_bit(tdb, i);
+ }
+ ok(corrupt == verifiable * CHAR_BIT, "corrupt %u should be %u",
+ corrupt, verifiable * CHAR_BIT);
+}
+
+int main(int argc, char *argv[])
+{
+ struct tdb_context *tdb;
+
+ plan_tests(4);
+ /* This should use mmap. */
+ tdb = tdb_open_ex("run-corrupt.tdb", 2, TDB_CLEAR_IF_FIRST,
+ O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+ if (!tdb)
+ abort();
+ check_test(tdb);
+ tdb_close(tdb);
+
+ /* This should not. */
+ tdb = tdb_open_ex("run-corrupt.tdb", 2, TDB_CLEAR_IF_FIRST|TDB_NOMMAP,
+ O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
+
+ if (!tdb)
+ abort();
+ check_test(tdb);
+ tdb_close(tdb);
+
+ return exit_status();
+}