Deoptimize context value in Turbofan (and Crankshaft).

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <limits>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 11175 matching lines @@
   int GetSourcePosition() {
     return is_optimized_
         ? deoptimized_frame_->GetSourcePosition()
         : frame_->LookupCode()->SourcePosition(frame_->pc());
   }
   bool IsConstructor() {
     return is_optimized_ && !is_bottommost_
         ? deoptimized_frame_->HasConstructStub()
         : frame_->IsConstructor();
   }
+  Object* GetContext() {
+    return is_optimized_ ? deoptimized_frame_->GetContext() : frame_->context();
+  }
 
   // To inspect all the provided arguments the frame might need to be
   // replaced with the arguments frame.
   void SetArgumentsFrame(JavaScriptFrame* frame) {
     DCHECK(has_adapted_arguments_);
     frame_ = frame;
     is_optimized_ = frame_->is_optimized();
     DCHECK(!is_optimized_);
   }
 
@@ skipping 128 matching lines @@
     // Use the value from the stack.
     if (scope_info->LocalIsSynthetic(i))
       continue;
     locals->set(local * 2, scope_info->LocalName(i));
     locals->set(local * 2 + 1, frame_inspector.GetExpression(i));
     local++;
   }
   if (local < local_count) {
     // Get the context containing declarations.
     Handle<Context> context(
-        Context::cast(it.frame()->context())->declaration_context());
+        Context::cast(frame_inspector.GetContext())->declaration_context());
     for (; i < scope_info->LocalCount(); ++i) {
       if (scope_info->LocalIsSynthetic(i))
         continue;
       Handle<String> name(scope_info->LocalName(i));
       VariableMode mode;
       InitializationFlag init_flag;
       MaybeAssignedFlag maybe_assigned_flag;
       locals->set(local * 2, *name);
       int context_slot_index = ScopeInfo::ContextSlotIndex(
           scope_info, name, &mode, &init_flag, &maybe_assigned_flag);
@@ skipping 1664 matching lines @@
   Handle<JSFunction> function(JSFunction::cast(frame_inspector.GetFunction()));
 
   // Traverse the saved contexts chain to find the active context for the
   // selected frame.
   SaveContext* save = FindSavedContextForFrame(isolate, frame);
 
   SaveContext savex(isolate);
   isolate->set_context(*(save->context()));
 
   // Evaluate on the context of the frame.
-  Handle<Context> context(Context::cast(frame->context()));
+  Handle<Context> context(Context::cast(frame_inspector.GetContext()));
   DCHECK(!context.is_null());
 
   // Materialize stack locals and the arguments object.
   Handle<JSObject> materialized =
       isolate->factory()->NewJSObject(isolate->object_function());
 
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, materialized,
       MaterializeStackLocalsWithFrameInspector(
           isolate, materialized, function, &frame_inspector));
@@ skipping 2612 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal