tal: add tal_expand().

[ccan] / ccan / tal / test / run-overflow.c

diff --git a/ccan/tal/test/run-overflow.c b/ccan/tal/test/run-overflow.c
index 989fcd2aba2eee5e9339e06abdd3be4eb7549644..c5daf97d2794b99966dd59e959cdab7d649be87f 100644 (file)
--- a/ccan/tal/test/run-overflow.c
+++ b/ccan/tal/test/run-overflow.c
@@ -13,8 +13,9 @@ int main(void)
 {
        void *p;
        int *pi, *origpi;
+       char *cp;
 
-       plan_tests(26);
+       plan_tests(30);
 
        tal_set_backend(NULL, NULL, NULL, my_error);
 
@@ -81,5 +82,17 @@ int main(void)
        ok1(error_count == 1);
        ok1(!tal_first(NULL));
 
+       /* Overflow on expand addition. */
+       cp = tal_arr(p, char, 100);
+       ok1(!tal_expand(&cp, NULL, (size_t)-99UL));
+       ok1(error_count == 2);
+       tal_free(cp);
+
+       /* Overflow when multiplied by size */
+       origpi = tal_arr(NULL, int, 100);
+       ok1(!tal_expand(&origpi, NULL, (size_t)-1UL / sizeof(int)));
+       ok1(error_count == 3);
+       tal_free(origpi);
+
        return exit_status();
 }