Add support for eventfd2 to syscall.stp tapset.

* tapset/aux_syscalls.stp (_eventfd2_flag_str): New utility function.
* tapset/syscalls.stp (syscall.eventfd[.return]): Add alternatives to
  handle eventfd2.
* testsuite/systemtap.syscall/eventfd.c: New test.

1 files changed, 21 insertions, 0 deletions

diff --git a/testsuite/systemtap.syscall/eventfd.c b/testsuite/systemtap.syscall/eventfd.c
new file mode 100644
index 00000000..f204ddeb
--- /dev/null
+++ b/testsuite/systemtap.syscall/eventfd.c
@@ -0,0 +1,21 @@
+/* COVERAGE: eventfd eventfd2 */
+#include <sys/eventfd.h>
+
+int main()
+{
+  int fd = eventfd(0, 0);
+  //staptest// eventfd (0) = NNNN
+
+#ifdef EFD_NONBLOCK
+  fd = eventfd(1, EFD_NONBLOCK);
+  //staptest// eventfd2 (1, EFD_NONBLOCK) = NNNN
+
+  fd = eventfd(2, EFD_CLOEXEC);
+  //staptest// eventfd2 (2, EFD_CLOEXEC) = NNNN
+
+  fd = eventfd(3, EFD_NONBLOCK|EFD_CLOEXEC);
+  //staptest// eventfd2 (3, EFD_NONBLOCK|EFD_CLOEXEC) = NNNN
+#endif
+
+  return 0;
+}