From fee6e493b0062930f091847e68f14d9fc2bbd4bb Mon Sep 17 00:00:00 2001
From: Johnny Chen <johnny.chen@apple.com>
Date: Mon, 19 Dec 2011 22:51:27 +0000
Subject: [PATCH] Work in progress for:

rdar://problem/10577182
Audit lldb API impl for places where we need to perform a NULL check

Add NULL checks for SBDebugger APIs.

llvm-svn: 146917
---
 lldb/source/Core/UserSettingsController.cpp   | 14 +++++++--
 .../python_api/debugger/TestDebuggerAPI.py    | 30 +++++++++++++++++++
 2 files changed, 41 insertions(+), 3 deletions(-)
 create mode 100644 lldb/test/python_api/debugger/TestDebuggerAPI.py

diff --git a/lldb/source/Core/UserSettingsController.cpp b/lldb/source/Core/UserSettingsController.cpp
index 91e4f0beb305..65c263f396e0 100644
--- a/lldb/source/Core/UserSettingsController.cpp
+++ b/lldb/source/Core/UserSettingsController.cpp
@@ -280,7 +280,9 @@ UserSettingsController::SetVariable (const char *full_dot_name,
     ConstString const_var_name;
     const ConstString &default_name = InstanceSettings::GetDefaultName();
 
-    Args names = UserSettingsController::BreakNameIntoPieces (full_dot_name);
+    Args names;
+    if (full_dot_name )
+        names = UserSettingsController::BreakNameIntoPieces (full_dot_name);
     int num_pieces = names.GetArgumentCount();
 
     if (num_pieces < 1)
@@ -538,12 +540,18 @@ UserSettingsController::GetVariable
     Error &err
 )
 {
-    Args names = UserSettingsController::BreakNameIntoPieces (full_dot_name);
-    ConstString const_var_name;
     StringList value;
+    if (!full_dot_name)
+    {
+        err.SetErrorString ("invalid variable name");
+        return value;
+    }
 
+    Args names = UserSettingsController::BreakNameIntoPieces (full_dot_name);
     int num_pieces = names.GetArgumentCount();
 
+    ConstString const_var_name;
+
     ConstString prefix (names.GetArgumentAtIndex (0));
     const_var_name.SetCString (names.GetArgumentAtIndex (num_pieces - 1));
 
diff --git a/lldb/test/python_api/debugger/TestDebuggerAPI.py b/lldb/test/python_api/debugger/TestDebuggerAPI.py
new file mode 100644
index 000000000000..b9d169e244ae
--- /dev/null
+++ b/lldb/test/python_api/debugger/TestDebuggerAPI.py
@@ -0,0 +1,30 @@
+"""
+Test Debugger APIs.
+"""
+
+import os, time
+import re
+import unittest2
+import lldb, lldbutil
+from lldbtest import *
+
+class DebuggerAPITestCase(TestBase):
+
+    mydir = os.path.join("python_api", "debugger")
+
+    @python_api_test
+    def test_debugger_api_boundary_condition(self):
+        """Exercise SBDebugger APIs with boundary conditions."""
+        self.dbg.HandleCommand(None)
+        self.dbg.SetDefaultArchitecture(None)
+        self.dbg.GetScriptingLanguage(None)
+        self.dbg.CreateTarget(None)
+        self.dbg.CreateTarget(None, None, None, True, lldb.SBError())
+        self.dbg.CreateTargetWithFileAndTargetTriple(None, None)
+        self.dbg.CreateTargetWithFileAndArch(None, None)
+        self.dbg.FindTargetWithFileAndArch(None, None)
+        self.dbg.SetInternalVariable(None, None, None)
+        self.dbg.GetInternalVariableValue(None, None)
+        self.dbg.SetPrompt(None)
+        self.dbg.SetCurrentPlatform(None)
+        self.dbg.SetCurrentPlatformSDKRoot(None)