From 6a7dc7d9c3df7d5d722f0702a0a0c8d55591006e Mon Sep 17 00:00:00 2001
From: Mark Wielaard <mjw@redhat.com>
Date: Fri, 12 Jun 2009 22:37:11 +0200
Subject: Add exelib uprobes test framework.

Tests uprobes placed in executables and shared libraries on different
arches (32-on-64 currently disabled), gcc/g++, optimizations (currently
disabled), prelinked libs (currently disabled), seperate libs/exe debuginfo
and pie executables.

* testsuite/systemtap.base/uprobes_exe.c: Moved to...
* testsuite/systemtap.exelib/uprobes_exe.c: From systemtap.base.
* testsuite/systemtap.base/uprobes_lib.c: Moved to...
* testsuite/systemtap.exelib/uprobes_lib.c: From systemtap.base.
* testsuite/systemtap.base/uprobes_lib.exp: Rewritten as...
* testsuite/systemtap.exelib/lib.tcl: From uprobes_lib.exp.
* testsuite/systemtap.base/uprobes_lib.stp: Rewritten as...
* testsuite/systemtap.exelib/lib.stp: From uprobes_lib.stp.
* testsuite/systemtap.base/uprobes_uname.exp: Rewritten as...
* testsuite/systemtap.exelib/uname.tcl: From uprobes_uname.exp.
* testsuite/systemtap.base/uprobes_uname.stp: Rewritten as...
* testsuite/systemtap.exelib/uname.stp: From uprobes_uname.stp.
* testsuite/systemtap.base/uprobes_ustack.exp: Rewritten as...
* testsuite/systemtap.exelib/ustack.tcl: From uprobes_ustack.exp.
* testsuite/systemtap.base/uprobes_ustack.stp: Rewritten as...
* testsuite/systemtap.exelib/ustack.stp: From uprobes_ustack.stp.
* testsuite/systemtap.exelib/exelib.exp: New exelib uprobes framework.
* testsuite/systemtap.exelib/cleanup.tcl: New file.
---
 testsuite/systemtap.exelib/uprobes_lib.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 testsuite/systemtap.exelib/uprobes_lib.c

(limited to 'testsuite/systemtap.exelib/uprobes_lib.c')

diff --git a/testsuite/systemtap.exelib/uprobes_lib.c b/testsuite/systemtap.exelib/uprobes_lib.c
new file mode 100644
index 00000000..25297b6b
--- /dev/null
+++ b/testsuite/systemtap.exelib/uprobes_lib.c
@@ -0,0 +1,21 @@
+/* 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.
+ */
+
+void
+lib_func (int bar)
+{
+  if (bar > 1)
+    lib_func (bar - 1);
+}
+
+void
+lib_main ()
+{
+  lib_func (3);
+}
-- 
cgit 


From 5e3d7f3a3aa8d11b67e74de0c3d9187c323cbff2 Mon Sep 17 00:00:00 2001
From: Mark Wielaard <mjw@redhat.com>
Date: Mon, 15 Jun 2009 13:37:39 +0200
Subject: PR10274 Fix exelib -O3 testcase.

The testcase now uses noinline, an empty asm statement and a volatile
variable to prevent the function getting inlined, being totally unrolled
or the recursive call being replaced with an inner-iteration.

This does defeat part of the testcase though, which was testing unwinding
through an optimized recursive function. But it seems the best we can do.

* testsuite/systemtap.exelib/exelib.exp: Add -O3 to the mix.
* testsuite/systemtap.exelib/uprobes_exe.c: Use volatile bar and mark
  main_func noinline.
* testsuite/systemtap.exelib/uprobes_lib.c: Use volatile foo and mark
  lib_func noinline.
---
 testsuite/systemtap.exelib/uprobes_lib.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

(limited to 'testsuite/systemtap.exelib/uprobes_lib.c')

diff --git a/testsuite/systemtap.exelib/uprobes_lib.c b/testsuite/systemtap.exelib/uprobes_lib.c
index 25297b6b..072a1d61 100644
--- a/testsuite/systemtap.exelib/uprobes_lib.c
+++ b/testsuite/systemtap.exelib/uprobes_lib.c
@@ -7,15 +7,24 @@
  * later version.
  */
 
-void
+// 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)
 {
-  if (bar > 1)
-    lib_func (bar - 1);
+  asm ("");
+  if (bar - foo > 0)
+    foo = lib_func (bar - foo);
+  return foo;
 }
 
 void
 lib_main ()
 {
-  lib_func (3);
+  foo = 1;
+  foo = lib_func (3);
 }
-- 
cgit 


From cba30aa93a8836cd9f88b494c17bc991c997d5f2 Mon Sep 17 00:00:00 2001
From: Mark Wielaard <mjw@redhat.com>
Date: Mon, 15 Jun 2009 17:16:14 +0200
Subject: Add (disabled) testcase for stap probe marks to exelib.

* testsuite/systemtap.exelib/exelib.exp: Compile against sdt.h.
* testsuite/systemtap.exelib/uprobes_exe.c: Add main_count probe mark.
* testsuite/systemtap.exelib/uprobes_lib.c: Add func_count probe mark.
* testsuite/systemtap.exelib/mark.tcl: New test.
* testsuite/systemtap.exelib/mark.stp: New test tapset.
---
 testsuite/systemtap.exelib/uprobes_lib.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'testsuite/systemtap.exelib/uprobes_lib.c')

diff --git a/testsuite/systemtap.exelib/uprobes_lib.c b/testsuite/systemtap.exelib/uprobes_lib.c
index 072a1d61..e3416d17 100644
--- a/testsuite/systemtap.exelib/uprobes_lib.c
+++ b/testsuite/systemtap.exelib/uprobes_lib.c
@@ -7,6 +7,8 @@
  * 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;
 
@@ -17,6 +19,7 @@ __attribute__((noinline))
 lib_func (int bar)
 {
   asm ("");
+  STAP_PROBE1(test, func_count, bar);
   if (bar - foo > 0)
     foo = lib_func (bar - foo);
   return foo;
-- 
cgit