[Interpreter] Save and restore dispatch table pointer during calls.

src/deoptimizer.cc

 // Copyright 2013 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 "src/deoptimizer.h"
 
 #include "src/accessors.h"
 #include "src/ast/prettyprinter.h"
 #include "src/codegen.h"
 #include "src/disasm.h"
 #include "src/frames-inl.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/global-handles.h"
+#include "src/interpreter/interpreter.h"
 #include "src/macro-assembler.h"
 #include "src/profiler/cpu-profiler.h"
 #include "src/v8.h"
 
 
 namespace v8 {
 namespace internal {
 
 static MemoryChunk* AllocateCodeChunk(MemoryAllocator* allocator) {
   return allocator->AllocateChunk(Deoptimizer::GetMaxDeoptTableSize(),
@@ skipping 1149 matching lines @@
 
   // The function was mentioned explicitly in the BEGIN_FRAME.
   output_offset -= kPointerSize;
   input_offset -= kPointerSize;
   value = reinterpret_cast<intptr_t>(function);
   // The function for the bottommost output frame should also agree with the
   // input frame.
   DCHECK(!is_bottommost || input_->GetFrameSlot(input_offset) == value);
   WriteValueToOutput(function, 0, frame_index, output_offset, "function    ");
 
-  // TODO(rmcilroy): Deal with new.target correctly - currently just set it to
+  // The new.target slot is only used during function activiation which is
+  // before the first deopt point, so should never be needed. Just set it to
   // undefined.
   output_offset -= kPointerSize;
   input_offset -= kPointerSize;
   Object* new_target = isolate_->heap()->undefined_value();
   WriteValueToOutput(new_target, 0, frame_index, output_offset, "new_target  ");
 
+  // Set the dispatch table pointer.
+  output_offset -= kPointerSize;
+  input_offset -= kPointerSize;
+  Address dispatch_table = isolate()->interpreter()->dispatch_table_address();
+  WriteValueToOutput(reinterpret_cast<Object*>(dispatch_table), 0, frame_index,
+                     output_offset, "dispatch_table ");
+
   // The bytecode offset was mentioned explicitly in the BEGIN_FRAME.
   output_offset -= kPointerSize;
   input_offset -= kPointerSize;
   int raw_bytecode_offset =
       BytecodeArray::kHeaderSize - kHeapObjectTag + bytecode_offset.ToInt();
   Smi* smi_bytecode_offset = Smi::FromInt(raw_bytecode_offset);
   WriteValueToOutput(smi_bytecode_offset, 0, frame_index, output_offset,
                      "bytecode offset ");
 
   // Translate the rest of the interpreter registers in the frame.
@@ skipping 2511 matching lines @@
       DCHECK(value_info->IsMaterializedObject());
 
       value_info->value_ =
           Handle<Object>(previously_materialized_objects->get(i), isolate_);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8