Added a "sources.py" which adds a command that can print out the source files contained in one or more modules.

Added "mach_o.py" which is a mach-o parser that can dump mach-o file contents and also extract sections. It uses the "file_extract" module and the "dict_utils" module.

llvm-svn: 189959
diff --git a/lldb/examples/python/sources.py b/lldb/examples/python/sources.py
new file mode 100644
index 0000000..0eb5858
--- /dev/null
+++ b/lldb/examples/python/sources.py
@@ -0,0 +1,28 @@
+#!/usr/bin/python
+
+import lldb
+import shlex
+
+def dump_module_sources(module, result):
+    if module:
+        print >> result, "Module: %s" % (module.file)
+        for compile_unit in module.compile_units:
+            if compile_unit.file:
+                print >> result, "  %s" % (compile_unit.file)
+    
+def info_sources(debugger, command, result, dict):
+    description='''This command will dump all compile units in any modules that are listed as arguments, or for all modules if no arguments are supplied.'''
+    module_names = shlex.split(command)
+    target = debugger.GetSelectedTarget()
+    if module_names:
+        for module_name in module_names:
+            dump_module_sources(target.module[module_name], result)
+    else:
+        for module in target.modules:
+            dump_module_sources(module, result)
+        
+        
+def __lldb_init_module (debugger, dict):
+    # Add any commands contained in this module to LLDB
+    debugger.HandleCommand('command script add -f sources.info_sources info_sources')
+    print 'The "info_sources" command has been installed, type "help info_sources" or "info_sources --help" for detailed help.'