X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Ftal%2Ftest%2Frun-allocfail.c;fp=ccan%2Ftal%2Ftest%2Frun-allocfail.c;h=dd6abff4dc6f7a0678bb3055305330382516143e;hb=0e34459a02e2615f50bac2767c7dce6632470946;hp=0000000000000000000000000000000000000000;hpb=33527c60ba3c5c72ed31fbb064c38db2b3d2c733;p=ccan

diff --git a/ccan/tal/test/run-allocfail.c b/ccan/tal/test/run-allocfail.c
new file mode 100644
index 00000000..dd6abff4
--- /dev/null
+++ b/ccan/tal/test/run-allocfail.c
@@ -0,0 +1,126 @@
+#include <ccan/tal/tal.h>
+#include <ccan/tal/tal.c>
+#include <ccan/tap/tap.h>
+
+static int alloc_count, when_to_fail, err_count;
+static bool stealing;
+
+static void *failing_alloc(size_t len)
+{
+	if (alloc_count++ == when_to_fail)
+		return NULL;
+	/* once we've failed once, it shouldn't ask again (steal can though). */
+	assert(stealing || alloc_count <= when_to_fail);
+
+	return malloc(len);
+}
+
+static void nofail_on_error(const char *msg)
+{
+	diag("ERROR: %s", msg);
+	err_count++;
+}
+
+static void destroy_p(void *p)
+{
+}
+
+int main(void)
+{
+	void *p, *c1, *c2;
+	bool success;
+
+	plan_tests(21);
+
+	tal_set_backend(failing_alloc, NULL, NULL, nofail_on_error);
+
+	/* Fail at each possible point in an allocation. */
+	when_to_fail = err_count = 0;
+	do {
+		alloc_count = 0;
+		p = tal(NULL, char);
+		when_to_fail++;
+	} while (!p);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	ok1(err_count == when_to_fail - 1);
+
+	/* Do it again. */
+	when_to_fail = err_count = 0;
+	do {
+		alloc_count = 0;
+		c1 = tal(p, char);
+		when_to_fail++;
+	} while (!c1);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	ok1(err_count == when_to_fail - 1);
+
+	/* Now for second child. */
+	when_to_fail = err_count = 0;
+	do {
+		alloc_count = 0;
+		c2 = tal(p, char);
+		when_to_fail++;
+	} while (!c2);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	/* Note: adding a child will fall through if group alloc fails. */
+	ok1 (err_count == when_to_fail - 1 || err_count == when_to_fail);
+
+	/* Now while adding a destructor. */
+	when_to_fail = err_count = 0;
+	do {
+		alloc_count = 0;
+		success = tal_add_destructor(p, destroy_p);
+		when_to_fail++;
+	} while (!success);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	ok1(err_count == when_to_fail - 1);
+
+	/* Now while adding a name. */
+	when_to_fail = err_count = 0;
+	do {
+		const char name[] = "some name";
+		alloc_count = 0;
+		success = tal_set_name(p, name);
+		when_to_fail++;
+	} while (!success);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	ok1(err_count == when_to_fail - 1);
+
+	/* Now while stealing. */
+	stealing = true;
+	when_to_fail = err_count = 0;
+	do {
+		alloc_count = 0;
+		success = tal_steal(c2, c1) != NULL;
+		when_to_fail++;
+	} while (!success);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	ok1(err_count == when_to_fail - 1);
+
+	/* Now stealing with more children (more coverage). */
+	when_to_fail = 1000;
+	(void)tal(p, char);
+	c1 = tal(p, char);
+	c2 = tal(p, char);
+	(void)tal(p, char);
+
+	/* Now steal again. */
+	when_to_fail = err_count = 0;
+	do {
+		alloc_count = 0;
+		success = tal_steal(c2, c1) != NULL;
+		when_to_fail++;
+	} while (!success);
+	ok1(alloc_count >= 1);
+	ok1(when_to_fail > 1);
+	ok1(err_count == when_to_fail - 1);
+
+	tal_free(p);
+	return exit_status();
+}