1 files changed, 82 insertions, 0 deletions
diff --git a/test/stdlib/teston_exit.c b/test/stdlib/teston_exit.c
new file mode 100644
index 0000000..f7e8fd0
--- /dev/null
+++ b/test/stdlib/teston_exit.c
@@ -0,0 +1,82 @@
+/*
+ * This test program will register the maximum number of exit functions
+ * with on_exit().  When this program exits, each exit function should get
+ * called in the reverse order in which it was registered.  (If the system
+ * supports more than 25 exit functions, the function names will loop, but
+ * the effect will be the same.  Feel free to add more functions if desired)
+ */
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef void (*efuncp) (int, void *);
+
+/* All functions call exit(), in order to test that exit functions can call
+ * exit() without screwing everything up. The value passed in through arg gets
+ * used as the next exit status.
+ */
+#define make_exitfunc(num) \
+__attribute__ ((__noreturn__)) static \
+void exitfunc##num(int status, void *arg) \
+{ \
+	printf("Executing exitfunc"#num" (status=%d, arg=%lu)\n", status, (unsigned long)arg); \
+	exit((unsigned long)arg); \
+}
+make_exitfunc(0)
+make_exitfunc(1)
+make_exitfunc(2)
+make_exitfunc(3)
+make_exitfunc(4)
+make_exitfunc(5)
+make_exitfunc(6)
+make_exitfunc(7)
+make_exitfunc(8)
+make_exitfunc(9)
+make_exitfunc(10)
+make_exitfunc(11)
+make_exitfunc(12)
+make_exitfunc(13)
+make_exitfunc(14)
+make_exitfunc(15)
+make_exitfunc(16)
+make_exitfunc(17)
+make_exitfunc(18)
+make_exitfunc(19)
+make_exitfunc(20)
+make_exitfunc(21)
+make_exitfunc(22)
+make_exitfunc(23)
+make_exitfunc(24)
+
+static efuncp func_table[] =
+	{
+	exitfunc0, exitfunc1, exitfunc2, exitfunc3, exitfunc4,
+	exitfunc5, exitfunc6, exitfunc7, exitfunc8, exitfunc9,
+	exitfunc10, exitfunc11, exitfunc12, exitfunc13, exitfunc14,
+	exitfunc15, exitfunc16, exitfunc17, exitfunc18, exitfunc19,
+	exitfunc20, exitfunc21, exitfunc22, exitfunc23, exitfunc24
+	};
+
+/* glibc dynamically adds exit functions, so it will keep adding until
+ * it runs out of memory!  So this will limit the number of exit functions
+ * we add in the loop below.  uClibc has a set limit (currently 20), so the
+ * loop will go until it can't add any more (so it should not hit this limit).
+ */
+#define ON_EXIT_LIMIT 20
+
+int
+main ( void )
+{
+	int i = 0;
+	unsigned long count = 0;
+	int numfuncs = sizeof(func_table)/sizeof(efuncp);
+
+	/* loop until no more can be added */
+	while(count < ON_EXIT_LIMIT && on_exit(func_table[i], (void *)count) >= 0) {
+		count++;
+		printf("Registered exitfunc%d with on_exit()\n", i);
+		i = (i+1) % numfuncs;
+	}
+	printf("%lu functions registered with on_exit.\n", count);
+	exit(count);
+}
+