Add stub for shadow memory instrumentation implementation

The actual implementation will be added incrementally
in future PRs.

Author: peterschrammel

src/goto-symex/Makefile

@@ -14,6 +14,7 @@ SRC = auto_objects.cpp \
       postcondition.cpp \
       precondition.cpp \
       renaming_level.cpp \
+      shadow_memory.cpp \
       show_program.cpp \
       show_vcc.cpp \
       slice.cpp \

src/goto-symex/shadow_memory.cpp

@@ -0,0 +1,111 @@
+/*******************************************************************\
+
+Module: Symex Shadow Memory Instrumentation
+
+Author: Peter Schrammel
+
+\*******************************************************************/
+
+/// \file
+/// Symex Shadow Memory Instrumentation
+
+#include "shadow_memory.h"
+
+#include <util/fresh_symbol.h>
+
+#include <langapi/language_util.h>
+
+#include "goto_symex_state.h"
+
+void shadow_memoryt::initialize_shadow_memory(
+  goto_symex_statet &state,
+  const exprt &expr,
+  const shadow_memory_field_definitionst::field_definitiont &fields)
+{
+  // To be implemented
+}
+
+symbol_exprt shadow_memoryt::add_field(
+  goto_symex_statet &state,
+  const exprt &expr,
+  const irep_idt &field_name,
+  const typet &field_type)
+{
+  // To be completed
+
+  const auto &function_symbol = ns.lookup(state.source.function_id);
+
+  symbolt &new_symbol = get_fresh_aux_symbol(
+    field_type,
+    id2string(state.source.function_id),
+    SHADOW_MEMORY_PREFIX + from_expr(expr) + "__" + id2string(field_name),
+    state.source.pc->source_location(),
+    function_symbol.mode,
+    state.symbol_table);
+
+  // Call some function on ns to silence the compiler in the meanwhile.
+  ns.get_symbol_table();
+
+  return new_symbol.symbol_expr();
+}
+
+void shadow_memoryt::symex_set_field(
+  goto_symex_statet &state,
+  const exprt::operandst &arguments)
+{
+  // To be implemented
+}
+
+void shadow_memoryt::symex_get_field(
+  goto_symex_statet &state,
+  const exprt &lhs,
+  const exprt::operandst &arguments)
+{
+  // To be implemented
+}
+
+void shadow_memoryt::symex_field_static_init(
+  goto_symex_statet &state,
+  const ssa_exprt &lhs)
+{
+  // To be implemented
+}
+
+void shadow_memoryt::symex_field_static_init_string_constant(
+  goto_symex_statet &state,
+  const ssa_exprt &expr,
+  const exprt &rhs)
+{
+  // To be implemented
+}
+
+void shadow_memoryt::symex_field_local_init(
+  goto_symex_statet &state,
+  const ssa_exprt &expr)
+{
+  // To be implemented
+}
+
+void shadow_memoryt::symex_field_dynamic_init(
+  goto_symex_statet &state,
+  const exprt &expr,
+  const side_effect_exprt &code)
+{
+  // To be implemented
+}
+
+shadow_memory_field_definitionst shadow_memoryt::gather_field_declarations(
+  abstract_goto_modelt &goto_model,
+  message_handlert &message_handler)
+{
+  // To be implemented
+
+  return shadow_memory_field_definitionst();
+}
+
+void shadow_memoryt::convert_field_declaration(
+  const code_function_callt &code_function_call,
+  shadow_memory_field_definitionst::field_definitiont &fields)
+{
+  // To be implemented
+}