Add two utility functions:

    o get_parent_frame(frame)
    o get_args_as_string(frame)

to lldbutil.py and create TestFrameUtils.py to exercise the utils.
Plus re-arrange the test/python_api/lldbutil to have three directories
for testing iteration, process stack traces, and the just added frame utils.

llvm-svn: 131213
diff --git a/lldb/test/python_api/lldbutil/frame/Makefile b/lldb/test/python_api/lldbutil/frame/Makefile
new file mode 100644
index 0000000..69b74b5
--- /dev/null
+++ b/lldb/test/python_api/lldbutil/frame/Makefile
@@ -0,0 +1,6 @@
+LEVEL = ../../../make
+
+C_SOURCES := main.c
+MAKE_DSYM :=NO
+
+include $(LEVEL)/Makefile.rules
diff --git a/lldb/test/python_api/lldbutil/frame/TestFrameUtils.py b/lldb/test/python_api/lldbutil/frame/TestFrameUtils.py
new file mode 100644
index 0000000..cd4ba09
--- /dev/null
+++ b/lldb/test/python_api/lldbutil/frame/TestFrameUtils.py
@@ -0,0 +1,62 @@
+"""
+Test utility functions for the frame object.
+"""
+
+import os
+import unittest2
+import lldb
+from lldbtest import *
+
+class FrameUtilsTestCase(TestBase):
+
+    mydir = "python_api/lldbutil/frame"
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break inside main().
+        self.line = line_number('main.c',
+                                "// Find the line number here.")
+
+    def test_frame_utils(self):
+        """Test utility functions for the frame object."""
+        self.buildDefault(dictionary={'C_SOURCES': 'main.c'})
+        self.frame_utils()
+
+    def frame_utils(self):
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target.IsValid(), VALID_TARGET)
+
+        breakpoint = target.BreakpointCreateByLocation("main.c", self.line)
+        self.assertTrue(breakpoint.IsValid(), VALID_BREAKPOINT)
+
+        # Now launch the process, and do not stop at entry point.
+        self.process = target.LaunchSimple(None, None, os.getcwd())
+
+        if not self.process.IsValid():
+            self.fail("SBTarget.LaunchProcess() failed")
+        self.assertTrue(self.process.GetState() == lldb.eStateStopped,
+                        PROCESS_STOPPED)
+
+        import lldbutil
+        thread = lldbutil.get_stopped_thread(self.process, lldb.eStopReasonBreakpoint)
+        frame0 = thread.GetFrameAtIndex(0)
+        frame1 = thread.GetFrameAtIndex(1)
+        parent = lldbutil.get_parent_frame(frame0)
+        self.assertTrue(parent.IsValid() and parent.GetFrameID() == frame1.GetFrameID())
+        frame0_args = lldbutil.get_args_as_string(frame0)
+        parent_args = lldbutil.get_args_as_string(parent)
+        self.assertTrue(frame0_args and parent_args)
+        if self.TraceOn():
+            lldbutil.print_stacktrace(thread)
+            print "Current frame: %s" % frame0_args
+            print "Parent frame: %s" % parent_args
+
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()
diff --git a/lldb/test/python_api/lldbutil/frame/main.c b/lldb/test/python_api/lldbutil/frame/main.c
new file mode 100644
index 0000000..e6eeef5
--- /dev/null
+++ b/lldb/test/python_api/lldbutil/frame/main.c
@@ -0,0 +1,47 @@
+//===-- main.c --------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include <stdio.h>
+
+int a(int);
+int b(int);
+int c(int);
+
+int a(int val)
+{
+    if (val <= 1)
+        return b(val);
+    else if (val >= 3)
+        return c(val);
+
+    return val;
+}
+
+int b(int val)
+{
+    return c(val);
+}
+
+int c(int val)
+{
+    return val + 3; // Find the line number here.
+}
+
+int main (int argc, char const *argv[])
+{
+    int A1 = a(1);  // a(1) -> b(1) -> c(1)
+    printf("a(1) returns %d\n", A1);
+    
+    int B2 = b(2);  // b(2) -> c(2)
+    printf("b(2) returns %d\n", B2);
+    
+    int A3 = a(3);  // a(3) -> c(3)
+    printf("a(3) returns %d\n", A3);
+    
+    return 0;
+}
diff --git a/lldb/test/python_api/lldbutil/Makefile b/lldb/test/python_api/lldbutil/iter/Makefile
similarity index 76%
rename from lldb/test/python_api/lldbutil/Makefile
rename to lldb/test/python_api/lldbutil/iter/Makefile
index 86af2f4..312d3fe 100644
--- a/lldb/test/python_api/lldbutil/Makefile
+++ b/lldb/test/python_api/lldbutil/iter/Makefile
@@ -1,4 +1,4 @@
-LEVEL = ../../make
+LEVEL = ../../../make
 
 CXX_SOURCES := main.cpp
 MAKE_DSYM :=NO
diff --git a/lldb/test/python_api/lldbutil/TestLLDBIterator.py b/lldb/test/python_api/lldbutil/iter/TestLLDBIterator.py
similarity index 98%
rename from lldb/test/python_api/lldbutil/TestLLDBIterator.py
rename to lldb/test/python_api/lldbutil/iter/TestLLDBIterator.py
index 51e852e..568048b 100644
--- a/lldb/test/python_api/lldbutil/TestLLDBIterator.py
+++ b/lldb/test/python_api/lldbutil/iter/TestLLDBIterator.py
@@ -10,7 +10,7 @@
 
 class LLDBIteratorTestCase(TestBase):
 
-    mydir = "python_api/lldbutil"
+    mydir = "python_api/lldbutil/iter"
 
     def setUp(self):
         # Call super's setUp().
diff --git a/lldb/test/python_api/lldbutil/TestRegistersIterator.py b/lldb/test/python_api/lldbutil/iter/TestRegistersIterator.py
similarity index 98%
rename from lldb/test/python_api/lldbutil/TestRegistersIterator.py
rename to lldb/test/python_api/lldbutil/iter/TestRegistersIterator.py
index ade237e..bd20b7e 100644
--- a/lldb/test/python_api/lldbutil/TestRegistersIterator.py
+++ b/lldb/test/python_api/lldbutil/iter/TestRegistersIterator.py
@@ -10,7 +10,7 @@
 
 class RegistersIteratorTestCase(TestBase):
 
-    mydir = "python_api/lldbutil"
+    mydir = "python_api/lldbutil/iter"
 
     def setUp(self):
         # Call super's setUp().
diff --git a/lldb/test/python_api/lldbutil/main.cpp b/lldb/test/python_api/lldbutil/iter/main.cpp
similarity index 100%
rename from lldb/test/python_api/lldbutil/main.cpp
rename to lldb/test/python_api/lldbutil/iter/main.cpp
diff --git a/lldb/test/python_api/lldbutil/Makefile b/lldb/test/python_api/lldbutil/process/Makefile
similarity index 76%
copy from lldb/test/python_api/lldbutil/Makefile
copy to lldb/test/python_api/lldbutil/process/Makefile
index 86af2f4..312d3fe 100644
--- a/lldb/test/python_api/lldbutil/Makefile
+++ b/lldb/test/python_api/lldbutil/process/Makefile
@@ -1,4 +1,4 @@
-LEVEL = ../../make
+LEVEL = ../../../make
 
 CXX_SOURCES := main.cpp
 MAKE_DSYM :=NO
diff --git a/lldb/test/python_api/lldbutil/TestPrintStackTraces.py b/lldb/test/python_api/lldbutil/process/TestPrintStackTraces.py
similarity index 97%
rename from lldb/test/python_api/lldbutil/TestPrintStackTraces.py
rename to lldb/test/python_api/lldbutil/process/TestPrintStackTraces.py
index cdd8c41..32ff8ac 100644
--- a/lldb/test/python_api/lldbutil/TestPrintStackTraces.py
+++ b/lldb/test/python_api/lldbutil/process/TestPrintStackTraces.py
@@ -10,7 +10,7 @@
 
 class ThreadsStackTracesTestCase(TestBase):
 
-    mydir = "python_api/lldbutil"
+    mydir = "python_api/lldbutil/process"
 
     def setUp(self):
         # Call super's setUp().
diff --git a/lldb/test/python_api/lldbutil/main.cpp b/lldb/test/python_api/lldbutil/process/main.cpp
similarity index 100%
copy from lldb/test/python_api/lldbutil/main.cpp
copy to lldb/test/python_api/lldbutil/process/main.cpp