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_exe.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 testsuite/systemtap.exelib/uprobes_exe.c

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

diff --git a/testsuite/systemtap.exelib/uprobes_exe.c b/testsuite/systemtap.exelib/uprobes_exe.c
new file mode 100644
index 00000000..b4811335
--- /dev/null
+++ b/testsuite/systemtap.exelib/uprobes_exe.c
@@ -0,0 +1,29 @@
+/* uprobes_lib test case
+ * 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 <unistd.h>
+
+// function from our library
+int lib_main (void);
+
+void
+main_func (int foo)
+{
+  if (foo > 1)
+    main_func (foo - 1);
+  else
+    lib_main();
+}
+
+int
+main (int argc, char *argv[], char *envp[])
+{
+  main_func (3);
+  return 0;
+}
-- 
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_exe.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

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

diff --git a/testsuite/systemtap.exelib/uprobes_exe.c b/testsuite/systemtap.exelib/uprobes_exe.c
index b4811335..d2905637 100644
--- a/testsuite/systemtap.exelib/uprobes_exe.c
+++ b/testsuite/systemtap.exelib/uprobes_exe.c
@@ -12,18 +12,27 @@
 // function from our library
 int lib_main (void);
 
-void
+// volatile static variable to prevent folding of main_func
+static volatile int bar;
+
+// Marked noinline and has an empty asm statement to prevent inlining
+// or optimizing away totally.
+int
+__attribute__((noinline))
 main_func (int foo)
 {
-  if (foo > 1)
-    main_func (foo - 1);
+  asm ("");
+  if (foo - bar > 0)
+    bar = main_func (foo - bar);
   else
     lib_main();
+  return bar;
 }
 
 int
 main (int argc, char *argv[], char *envp[])
 {
-  main_func (3);
+  bar = 1;
+  bar = main_func (3);
   return 0;
 }
-- 
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_exe.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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

diff --git a/testsuite/systemtap.exelib/uprobes_exe.c b/testsuite/systemtap.exelib/uprobes_exe.c
index d2905637..da65efa7 100644
--- a/testsuite/systemtap.exelib/uprobes_exe.c
+++ b/testsuite/systemtap.exelib/uprobes_exe.c
@@ -7,7 +7,7 @@
  * later version.
  */
 
-#include <unistd.h>
+#include "sdt.h" /* Really <sys/sdt.h>, but pick current source version. */
 
 // function from our library
 int lib_main (void);
@@ -22,6 +22,7 @@ __attribute__((noinline))
 main_func (int foo)
 {
   asm ("");
+  STAP_PROBE1(test, main_count, foo);
   if (foo - bar > 0)
     bar = main_func (foo - bar);
   else
-- 
cgit