From df33b2e928503d350b890d2e914640cd6e10eb69 Mon Sep 17 00:00:00 2001
From: Artur Grabowski <art@cvs.openbsd.org>
Date: Thu, 31 Jan 2002 16:35:47 +0000
Subject: Simple (ehmm) test for static destructors. Not for the faint-hearted.

---
 regress/lib/csu/dtors/Makefile |  4 +++
 regress/lib/csu/dtors/dtors.c  | 61 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 regress/lib/csu/dtors/Makefile
 create mode 100644 regress/lib/csu/dtors/dtors.c

diff --git a/regress/lib/csu/dtors/Makefile b/regress/lib/csu/dtors/Makefile
new file mode 100644
index 00000000000..128714f7187
--- /dev/null
+++ b/regress/lib/csu/dtors/Makefile
@@ -0,0 +1,4 @@
+#	$OpenBSD: Makefile,v 1.1 2002/01/31 16:35:46 art Exp $
+PROG=dtors
+
+.include <bsd.regress.mk>
diff --git a/regress/lib/csu/dtors/dtors.c b/regress/lib/csu/dtors/dtors.c
new file mode 100644
index 00000000000..b2ce92a3a80
--- /dev/null
+++ b/regress/lib/csu/dtors/dtors.c
@@ -0,0 +1,61 @@
+/*	$OpenBSD: dtors.c,v 1.1 2002/01/31 16:35:46 art Exp $	*/
+/*
+ * Written by Artur Grabowski <art@openbsd.org> Public Domain.
+ */
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <err.h>
+
+void zap(void) __attribute__((destructor));
+
+void *destarea;
+
+#define MAGIC "destructed"
+
+void
+zap(void)
+{
+	memcpy(destarea, MAGIC, sizeof(MAGIC));
+}
+
+/*
+ * XXX - horrible abuse of exit(), minherit and vfork().
+ */
+int
+main()
+{
+	int status;
+
+	destarea = mmap(NULL, getpagesize(), PROT_READ|PROT_WRITE, MAP_ANON,
+	    -1, 0);
+	if (destarea == MAP_FAILED)
+		err(1, "mmap");
+
+	if (minherit(destarea, getpagesize(), MAP_INHERIT_SHARE) != 0)
+		err(1, "minherit");
+
+	memset(destarea, 0, sizeof(MAGIC));
+
+	switch(fork()) {
+	case -1:
+		err(1, "fork");
+	case 0:
+		/*
+		 * Yes, it's exit(), not _exit(). We _want_ to run the
+		 * destructors in the child.
+		 */
+		exit(0);
+	}
+
+	if (wait(&status) < 0)
+		err(1, "wait");		/* XXX uses exit() */
+
+	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+		err(1, "child error");	/* XXX uses exit() */
+
+	_exit(memcmp(destarea, MAGIC, sizeof(MAGIC)) != 0);
+}	
-- 
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