1 files changed, 82 insertions, 0 deletions
diff --git a/tests/Ltest-varargs.c b/tests/Ltest-varargs.c
new file mode 100644
index 00000000..603fb57b
--- /dev/null
+++ b/tests/Ltest-varargs.c
@@ -0,0 +1,82 @@
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int ok;
+int verbose;
+
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 3)
+void a (int, ...) __attribute__((noinline, optimize(0)));
+void b (void) __attribute__((noinline, optimize(0)));
+void c (void) __attribute__((noinline, optimize(0)));
+#endif
+
+void
+b (void)
+{
+  void *v[20];
+  int i, n;
+
+  n = unw_backtrace(v, 20);
+
+  /* Check that the number of addresses given by unw_backtrace() looks
+   * reasonable. If the compiler inlined everything, then this check will also
+   * break. */
+  if (n >= 7)
+    ok = 1;
+
+  if (verbose)
+    for (i = 0; i < n; ++i)
+      printf ("[%d] %p\n", i, v[i]);
+}
+
+void
+c (void)
+{
+    b ();
+}
+
+void
+a (int d, ...)
+{
+  switch (d)
+    {
+    case 5:
+      a (4, 2,4);
+      break;
+    case 4:
+      a (3, 1,3,5);
+      break;
+    case 3:
+      a (2, 11, 13, 17, 23);
+      break;
+    case 2:
+      a (1);
+      break;
+    case 1:
+      c ();
+    }
+}
+
+int
+main (int argc, char **argv __attribute__((unused)))
+{
+  if (argc > 1)
+    verbose = 1;
+
+  a (5, 3, 4, 5, 6);
+
+  if (!ok)
+    {
+      fprintf (stderr, "FAILURE: expected deeper backtrace.\n");
+      return 1;
+    }
+
+  if (verbose)
+    printf ("SUCCESS.\n");
+
+  return 0;
+}