Merge branch 'master' of git://sources.redhat.com/git/systemtap

1 files changed, 33 insertions, 0 deletions

diff --git a/testsuite/systemtap.exelib/uprobes_lib.c b/testsuite/systemtap.exelib/uprobes_lib.c
new file mode 100644
index 00000000..e3416d17
--- /dev/null
+++ b/testsuite/systemtap.exelib/uprobes_lib.c
@@ -0,0 +1,33 @@
+/* uprobes_lib test case - library helper
+ * Copyright (C) 2009, Red Hat Inc.
+ *                                                          
+ * This file is part of systemtap, and is free software.  You can
+ * redistribute it and/or modify it under the terms of the GNU General
+ * Public License (GPL); either version 2, or (at your option) any
+ * later version.
+ */
+
+#include "sdt.h" /* Really <sys/sdt.h>, but pick current source version. */
+
+// volatile static variable to prevent folding of lib_func
+static volatile int foo;
+
+// Marked noinline and has an empty asm statement to prevent inlining
+// or optimizing away totally.
+int
+__attribute__((noinline))
+lib_func (int bar)
+{
+  asm ("");
+  STAP_PROBE1(test, func_count, bar);
+  if (bar - foo > 0)
+    foo = lib_func (bar - foo);
+  return foo;
+}
+
+void
+lib_main ()
+{
+  foo = 1;
+  foo = lib_func (3);
+}