Add ubacktrace(), print_ustack() and print_ubacktrace().

* runtime/sym.c (_stp_usymbol_print): New function.
* tapset/ucontext-unwind.stp (print_ubacktrace): New tapset function.
  (ubacktrace): Likewise.
* tapset/ucontext-symbols.stp (print_ustack): Likewise.
* testsuite/buildok/ustack.stp: New test for above three functions.

1 files changed, 10 insertions, 0 deletions

diff --git a/testsuite/buildok/ustack.stp b/testsuite/buildok/ustack.stp
new file mode 100755
index 00000000..23af0bff
--- /dev/null
+++ b/testsuite/buildok/ustack.stp
@@ -0,0 +1,10 @@
+#! stap -p4
+#
+# Test the translatability for ubacktrace(), print_ustack()
+# and print_ubacktrace()
+#
+probe begin
+{
+   print_ustack(ubacktrace());
+   print_ubacktrace();
+}