Convert the ScriptInterpreter system to a plugin-based one.

Previously embedded interpreters were handled as ad-hoc source
files compiled into source/Interpreter.  This made it hard to
disable a specific interpreter, or to add support for other
interpreters and allow the developer to choose which interpreter(s)
were enabled for a particular build.

This patch converts script interpreters over to a plugin-based system.
Script interpreters now live in source/Plugins/ScriptInterpreter, and
the canonical LLDB interpreter, ScriptInterpreterPython, is moved there
as well.

Any new code interfacing with the Python C API must live in this location
from here on out.  Additionally, generic code should never need to
reference or make assumptions about the presence of a specific interpreter
going forward.

Differential Revision: http://reviews.llvm.org/D11431
Reviewed By: Greg Clayton

llvm-svn: 243681

lldb/include/lldb/API/SystemInitializerFull.h

@@ -33,7 +33,6 @@ class SystemInitializerFull : public SystemInitializerCommon
 
   private:
     void InitializeSWIG();
-    void TerminateSWIG();
 };
 }
 

lldb/include/lldb/Core/PluginManager.h

@@ -295,6 +295,23 @@ class PluginManager
     static const char *
     GetProcessPluginDescriptionAtIndex (uint32_t idx);
 
+    //------------------------------------------------------------------
+    // ScriptInterpreter
+    //------------------------------------------------------------------
+    static bool
+    RegisterPlugin(const ConstString &name, const char *description, lldb::ScriptLanguage script_lang,
+                               ScriptInterpreterCreateInstance create_callback);
+
+    static bool
+    UnregisterPlugin(ScriptInterpreterCreateInstance create_callback);
+
+    static ScriptInterpreterCreateInstance
+    GetScriptInterpreterCreateCallbackAtIndex(uint32_t idx);
+
+    static lldb::ScriptInterpreterSP
+    GetScriptInterpreterForLanguage(lldb::ScriptLanguage script_lang,
+                                    CommandInterpreter &interpreter);
+
     //------------------------------------------------------------------
     // SymbolFile
     //------------------------------------------------------------------

lldb/include/lldb/Interpreter/CommandInterpreter.h

@@ -14,6 +14,7 @@
 // C++ Includes
 // Other libraries and framework includes
 // Project includes
+#include "lldb/lldb-forward.h"
 #include "lldb/lldb-private.h"
 #include "lldb/Core/Broadcaster.h"
 #include "lldb/Core/Debugger.h"
@@ -520,7 +521,10 @@ class CommandInterpreter :
     GetOptionArgumentPosition (const char *in_string);
 
     ScriptInterpreter *
-    GetScriptInterpreter (bool can_create = true);
+    GetScriptInterpreter(bool can_create = true);
+
+    void
+    SetScriptInterpreter();
 
     void
     SkipLLDBInitFiles (bool skip_lldbinit_files)
@@ -709,7 +713,7 @@ class CommandInterpreter :
     OptionArgMap m_alias_options;               // Stores any options (with or without arguments) that go with any alias.
     CommandHistory m_command_history;
     std::string m_repeat_command;               // Stores the command that will be executed for an empty command string.
-    std::unique_ptr<ScriptInterpreter> m_script_interpreter_ap;
+    lldb::ScriptInterpreterSP m_script_interpreter_sp;
     lldb::IOHandlerSP m_command_io_handler_sp;
     char m_comment_char;
     bool m_batch_command_mode;

lldb/include/lldb/Interpreter/ScriptInterpreter.h

@@ -14,6 +14,7 @@
 
 #include "lldb/Core/Broadcaster.h"
 #include "lldb/Core/Error.h"
+#include "lldb/Core/PluginInterface.h"
 #include "lldb/Core/StructuredData.h"
 
 #include "lldb/Utility/PseudoTerminal.h"
@@ -36,8 +37,7 @@ class ScriptInterpreterLocker
     DISALLOW_COPY_AND_ASSIGN (ScriptInterpreterLocker);
 };
 
-
-class ScriptInterpreter
+class ScriptInterpreter : public PluginInterface
 {
 public:
 

lldb/include/lldb/lldb-forward.h

@@ -376,6 +376,8 @@ namespace lldb {
 #ifndef LLDB_DISABLE_PYTHON
     typedef std::shared_ptr<lldb_private::ScriptSummaryFormat> ScriptSummaryFormatSP;
 #endif // #ifndef LLDB_DISABLE_PYTHON
+    typedef std::shared_ptr<lldb_private::ScriptInterpreter> ScriptInterpreterSP;
+    typedef std::unique_ptr<lldb_private::ScriptInterpreter> ScriptInterpreterUP;
     typedef std::shared_ptr<lldb_private::Section> SectionSP;
     typedef std::unique_ptr<lldb_private::SectionList> SectionListUP;
     typedef std::weak_ptr<lldb_private::Section> SectionWP;

lldb/include/lldb/lldb-private-interfaces.h

@@ -33,6 +33,7 @@ namespace lldb_private
     typedef SystemRuntime *(*SystemRuntimeCreateInstance) (Process *process);
     typedef lldb::PlatformSP (*PlatformCreateInstance) (bool force, const ArchSpec *arch);
     typedef lldb::ProcessSP (*ProcessCreateInstance) (Target &target, Listener &listener, const FileSpec *crash_file_path);
+    typedef lldb::ScriptInterpreterSP (*ScriptInterpreterCreateInstance)(CommandInterpreter &interpreter);
     typedef SymbolFile* (*SymbolFileCreateInstance) (ObjectFile* obj_file);
     typedef SymbolVendor* (*SymbolVendorCreateInstance) (const lldb::ModuleSP &module_sp, lldb_private::Stream *feedback_strm);   // Module can be NULL for default system symbol vendor
     typedef bool (*BreakpointHitCallback) (void *baton, StoppointCallbackContext *context, lldb::user_id_t break_id, lldb::user_id_t break_loc_id);