D43859.diff
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	diff --git a/libexec/rtld-elf/tests/Makefile b/libexec/rtld-elf/tests/Makefile
	--- a/libexec/rtld-elf/tests/Makefile
	+++ b/libexec/rtld-elf/tests/Makefile
	@@ -13,6 +13,8 @@
	SRCS.$t= $t.c common.c
	.endfor

	+ATF_TESTS_C+= dlopen_test
	+
	WARNS?= 3

	.include <bsd.test.mk>
	diff --git a/libexec/rtld-elf/tests/dlopen_test.c b/libexec/rtld-elf/tests/dlopen_test.c
	new file mode 100644
	--- /dev/null
	+++ b/libexec/rtld-elf/tests/dlopen_test.c
	@@ -0,0 +1,52 @@
	+/*-
	+ *
	+ * Copyright (C) 2024 Kyle Evans <kevans@FreeBSD.org>
	+ *
	+ * SPDX-License-Identifier: BSD-2-Clause
	+ *
	+ */
	+
	+#include <dlfcn.h>
	+
	+#include <atf-c.h>
	+
	+ATF_TC_WITHOUT_HEAD(dlopen_basic);
	+ATF_TC_BODY(dlopen_basic, tc)
	+{
	+ void hdl, sym;
	+
	+ hdl = dlopen("libthr.so", RTLD_NOW);
	+ ATF_REQUIRE(hdl != NULL);
	+
	+ sym = dlsym(hdl, "pthread_create");
	+ ATF_REQUIRE(sym != NULL);
	+
	+ dlclose(hdl);
	+
	+ sym = dlsym(hdl, "pthread_create");
	+ ATF_REQUIRE(sym == NULL);
	+}
	+
	+ATF_TC_WITHOUT_HEAD(dlopen_recursing);
	+ATF_TC_BODY(dlopen_recursing, tc)
	+{
	+ void *hdl;
	+
	+ /*
	+ * If this doesn't crash, we're OK; a regression at one point caused
	+ * some infinite recursion here.
	+ */
	+ hdl = dlopen("libthr.so", RTLD_NOW \| RTLD_GLOBAL);
	+ ATF_REQUIRE(hdl != NULL);
	+
	+ dlclose(hdl);
	+}
	+
	+ATF_TP_ADD_TCS(tp)
	+{
	+
	+ ATF_TP_ADD_TC(tp, dlopen_basic);
	+ ATF_TP_ADD_TC(tp, dlopen_recursing);
	+
	+ return atf_no_error();
	+}