1 files changed, 173 insertions, 0 deletions

diff --git a/include/lldb/Expression/Materializer.h b/include/lldb/Expression/Materializer.h
new file mode 100644
index 0000000000000..208a081339234
--- /dev/null
+++ b/include/lldb/Expression/Materializer.h
@@ -0,0 +1,173 @@
+//===-- Materializer.h ------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef lldb_Materializer_h
+#define lldb_Materializer_h
+
+#include "lldb/lldb-private-types.h"
+#include "lldb/Core/Error.h"
+#include "lldb/Expression/IRMemoryMap.h"
+#include "lldb/Host/Mutex.h"
+#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Target/StackFrame.h"
+
+#include <vector>
+
+namespace lldb_private
+{
+    
+class Materializer
+{
+public:
+    Materializer ();
+    ~Materializer ();
+    
+    class Dematerializer
+    {
+    public:
+        Dematerializer () :
+            m_materializer(NULL),
+            m_map(NULL),
+            m_process_address(LLDB_INVALID_ADDRESS)
+        {
+        }
+        
+        ~Dematerializer ()
+        {
+            Wipe ();
+        }
+        
+        void Dematerialize (Error &err,
+                            lldb::ClangExpressionVariableSP &result_sp,
+                            lldb::addr_t frame_top,
+                            lldb::addr_t frame_bottom);
+        
+        void Wipe ();
+        
+        bool IsValid ()
+        {
+            return m_materializer && m_map && (m_process_address != LLDB_INVALID_ADDRESS);
+        }
+    private:
+        friend class Materializer;
+
+        Dematerializer (Materializer &materializer,
+                        lldb::StackFrameSP &frame_sp,
+                        IRMemoryMap &map,
+                        lldb::addr_t process_address) :
+            m_materializer(&materializer),
+            m_map(&map),
+            m_process_address(process_address)
+        {
+            if (frame_sp)
+            {
+                m_thread_wp = frame_sp->GetThread();
+                m_stack_id = frame_sp->GetStackID();
+            }
+        }
+        
+        Materializer       *m_materializer;
+        lldb::ThreadWP      m_thread_wp;
+        StackID             m_stack_id;
+        IRMemoryMap        *m_map;
+        lldb::addr_t        m_process_address;
+    };
+    
+    typedef std::shared_ptr<Dematerializer> DematerializerSP;
+    typedef std::weak_ptr<Dematerializer> DematerializerWP;
+    
+    DematerializerSP Materialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address, Error &err);
+    
+    uint32_t AddPersistentVariable (lldb::ClangExpressionVariableSP &persistent_variable_sp, Error &err);
+    uint32_t AddVariable (lldb::VariableSP &variable_sp, Error &err);
+    uint32_t AddResultVariable (const TypeFromUser &type, bool is_lvalue, bool keep_in_memory, Error &err);
+    uint32_t AddSymbol (const Symbol &symbol_sp, Error &err);
+    uint32_t AddRegister (const RegisterInfo &register_info, Error &err);
+    
+    uint32_t GetStructAlignment ()
+    {
+        return m_struct_alignment;
+    }
+    
+    uint32_t GetStructByteSize ()
+    {
+        return m_current_offset;
+    }
+    
+    uint32_t GetResultOffset ()
+    {
+        if (m_result_entity)
+            return m_result_entity->GetOffset();
+        else
+            return UINT32_MAX;
+    }
+    
+    class Entity
+    {
+    public:
+        Entity () :
+            m_alignment(1),
+            m_size(0),
+            m_offset(0)
+        {
+        }
+        
+        virtual ~Entity ()
+        {
+        }
+        
+        virtual void Materialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address, Error &err) = 0;
+        virtual void Dematerialize (lldb::StackFrameSP &frame_sp, IRMemoryMap &map, lldb::addr_t process_address,
+                                    lldb::addr_t frame_top, lldb::addr_t frame_bottom, Error &err) = 0;
+        virtual void DumpToLog (IRMemoryMap &map, lldb::addr_t process_address, Log *log) = 0;
+        virtual void Wipe (IRMemoryMap &map, lldb::addr_t process_address) = 0;
+        
+        uint32_t GetAlignment ()
+        {
+            return m_alignment;
+        }
+        
+        uint32_t GetSize ()
+        {
+            return m_size;
+        }
+        
+        uint32_t GetOffset ()
+        {
+            return m_offset;
+        }
+        
+        void SetOffset (uint32_t offset)
+        {
+            m_offset = offset;
+        }
+    protected:
+        void SetSizeAndAlignmentFromType (ClangASTType &type);
+        
+        uint32_t    m_alignment;
+        uint32_t    m_size;
+        uint32_t    m_offset;
+    };
+
+private:
+    uint32_t AddStructMember (Entity &entity);
+    
+    typedef std::unique_ptr<Entity>  EntityUP;
+    typedef std::vector<EntityUP>   EntityVector;
+    
+    DematerializerWP                m_dematerializer_wp;
+    EntityVector                    m_entities;
+    Entity                         *m_result_entity;
+    uint32_t                        m_current_offset;
+    uint32_t                        m_struct_alignment;
+};
+    
+}
+
+#endif