From 1b8fbbd843ddeb5fc81c9303db9c590a436d499b Mon Sep 17 00:00:00 2001
From: William Casarin <jb55@jb55.com>
Date: Mon, 9 Jul 2018 12:10:32 -0700
Subject: progress

---
 ccan/list/test/run-CCAN_LIST_DEBUG.c | 60 ++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 ccan/list/test/run-CCAN_LIST_DEBUG.c

(limited to 'ccan/list/test/run-CCAN_LIST_DEBUG.c')

diff --git a/ccan/list/test/run-CCAN_LIST_DEBUG.c b/ccan/list/test/run-CCAN_LIST_DEBUG.c
new file mode 100644
index 0000000..b8e5165
--- /dev/null
+++ b/ccan/list/test/run-CCAN_LIST_DEBUG.c
@@ -0,0 +1,60 @@
+/* Check that CCAN_LIST_DEBUG works */
+#include <setjmp.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <err.h>
+
+/* We don't actually want it to exit... */
+static jmp_buf aborted;
+#define abort() longjmp(aborted, 1)
+
+#define fprintf my_fprintf
+static char printf_buffer[1000];
+
+static int my_fprintf(FILE *stream, const char *format, ...)
+{
+	va_list ap;
+	int ret;
+	(void)stream;
+	va_start(ap, format);
+	ret = vsprintf(printf_buffer, format, ap);
+	va_end(ap);
+	return ret;
+}
+
+#define CCAN_LIST_DEBUG 1
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+
+int main(void)
+{
+	struct list_head list;
+	struct list_node n1;
+	char expect[100];
+
+	plan_tests(2);
+	/* Empty list. */
+	list.n.next = &list.n;
+	list.n.prev = &list.n;
+	ok1(list_check(&list, NULL) == &list);
+
+	/* Bad back ptr */
+	list.n.prev = &n1;
+
+	/* Aborting version. */
+	sprintf(expect, "run-CCAN_LIST_DEBUG.c:51: prev corrupt in node %p (0) of %p\n",
+		&list, &list);
+	if (setjmp(aborted) == 0) {
+		assert(list_empty(&list));
+		fail("list_empty on empty with bad back ptr didn't fail!");
+	} else {
+		/* __FILE__ might give full path. */
+		int prep = strlen(printf_buffer) - strlen(expect);
+		ok1(prep >= 0 && strcmp(printf_buffer + prep, expect) == 0);
+	}
+
+	return exit_status();
+}
-- 
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