1 files changed, 126 insertions, 0 deletions
diff --git a/lldb/include/lldb/Expression/DWARFExpression.h b/lldb/include/lldb/Expression/DWARFExpression.h
new file mode 100644
index 00000000000..072697659fa
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+++ b/lldb/include/lldb/Expression/DWARFExpression.h
@@ -0,0 +1,126 @@
+//===-- DWARFExpression.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_DWARFExpression_h_
+#define liblldb_DWARFExpression_h_
+
+#include "lldb/lldb-private.h"
+#include "lldb/Core/ClangForward.h"
+#include "lldb/Core/Address.h"
+#include "lldb/Core/DataExtractor.h"
+#include "lldb/Core/Error.h"
+#include "lldb/Core/Scalar.h"
+
+class ClangExpressionVariable;
+class ClangExpressionVariableList;
+
+namespace lldb_private {
+
+class ClangExpressionDeclMap;
+
+//----------------------------------------------------------------------
+// A class designed to evaluate the DWARF expression opcodes. We will
+// likely augment its abilities to handle features not supported by
+// the DWARF expression engine.
+//----------------------------------------------------------------------
+class DWARFExpression
+{
+public:
+
+    //------------------------------------------------------------------
+    // Constructors and Destructors
+    //------------------------------------------------------------------
+    DWARFExpression();
+
+    DWARFExpression(const DataExtractor& data,
+                    uint32_t data_offset,
+                    uint32_t data_length,
+                    const Address* loclist_base_addr_ptr);
+
+    DWARFExpression(const DWARFExpression& rhs);
+
+    virtual
+    ~DWARFExpression();
+
+    void
+    GetDescription (Stream *s, lldb::DescriptionLevel level) const;
+
+    bool
+    IsValid() const;
+
+    bool
+    IsLocationList() const;
+
+    bool
+    LocationListContainsLoadAddress (Process* process, const Address &addr) const;
+
+    void
+    SetOpcodeData(const DataExtractor& data, const Address* loclist_base_addr_ptr);
+
+    void
+    SetOpcodeData(const DataExtractor& data, uint32_t data_offset, uint32_t data_length, const Address* loclist_base_addr_ptr);
+
+    void
+    SetLocationListBaseAddress(Address& base_addr);
+
+    int
+    GetRegisterKind ();
+
+    void
+    SetRegisterKind (int reg_kind);
+
+    bool
+    Evaluate (ExecutionContextScope *exe_scope,
+              clang::ASTContext *ast_context,
+              const Value* initial_value_ptr,
+              Value& result,
+              Error *error_ptr) const;
+
+    bool
+    Evaluate (ExecutionContext *exe_ctx,
+              clang::ASTContext *ast_context,
+              const Value* initial_value_ptr,
+              Value& result,
+              Error *error_ptr) const;
+
+    static bool
+    Evaluate (ExecutionContext *exe_ctx,
+              clang::ASTContext *ast_context,
+              const DataExtractor& opcodes,
+              ClangExpressionVariableList *expr_locals,
+              ClangExpressionDeclMap *decl_map,
+              const uint32_t offset,
+              const uint32_t length,
+              const uint32_t reg_set,
+              const Value* initial_value_ptr,
+              Value& result,
+              Error *error_ptr);
+
+    void
+    SetExpressionLocalVariableList (ClangExpressionVariableList *locals);
+    
+    void
+    SetExpressionDeclMap (ClangExpressionDeclMap *decl_map);
+
+protected:
+
+    void DumpLocation(Stream *s, uint32_t offset, uint32_t length, lldb::DescriptionLevel level) const;
+    //------------------------------------------------------------------
+    // Classes that inherit from DWARFExpression can see and modify these
+    //------------------------------------------------------------------
+    DataExtractor   m_data;
+    int m_reg_kind; // One of the defines that starts with LLDB_REGKIND_
+    Address m_loclist_base_addr; // Base address needed for location lists
+    ClangExpressionVariableList *m_expr_locals;
+    ClangExpressionDeclMap *m_decl_map;
+};
+
+} // namespace lldb_private
+
+#endif  // liblldb_DWARFExpression_h_