[builtins] Add support for JS builtins written in TurboFan.

src/frames.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 "src/frames.h"
 
 #include <sstream>
 
 #include "src/ast/ast.h"
 #include "src/ast/scopeinfo.h"
@@ skipping 438 matching lines @@
   } else {
     // Look up the code object to figure out the type of the stack frame.
     Code* code_obj =
         GetContainingCode(iterator->isolate(), *(state->pc_address));
     if (code_obj != nullptr) {
       if (code_obj->is_interpreter_entry_trampoline() ||
           code_obj->is_interpreter_enter_bytecode_dispatch()) {
         return INTERPRETED;
       }
       switch (code_obj->kind()) {
+        case Code::BUILTIN:
+          if (marker->IsSmi()) break;

[Michael Starzinger, 2016/03/22 12:54:32]

Please add a one-line comment explaining that this is due to builtins being
compiled with optimizing compiler.

[Benedikt Meurer, 2016/03/22 13:01:18]

Done.

+          return OPTIMIZED;
         case Code::FUNCTION:
           return JAVA_SCRIPT;
         case Code::OPTIMIZED_FUNCTION:
           return OPTIMIZED;
         case Code::WASM_FUNCTION:
           return WASM;
         case Code::WASM_TO_JS_FUNCTION:
           return WASM_TO_JS;
         case Code::JS_TO_WASM_FUNCTION:
           return JS_TO_WASM;
@@ skipping 505 matching lines @@
   PrintF("\npc: %d\n", code_offset_);
 }
 
 
 void OptimizedFrame::Summarize(List<FrameSummary>* frames) {
   DCHECK(frames->length() == 0);
   DCHECK(is_optimized());
 
   // Delegate to JS frame in absence of turbofan deoptimization.
   // TODO(turbofan): Revisit once we support deoptimization across the board.
-  if (LookupCode()->is_turbofanned() && function()->shared()->asm_function() &&
-      !FLAG_turbo_asm_deoptimization) {
+  Code* code = LookupCode();
+  if (code->kind() == Code::BUILTIN ||
+      (code->is_turbofanned() && function()->shared()->asm_function() &&
+       !FLAG_turbo_asm_deoptimization)) {
     return JavaScriptFrame::Summarize(frames);
   }
 
   DisallowHeapAllocation no_gc;
   int deopt_index = Safepoint::kNoDeoptimizationIndex;
   DeoptimizationInputData* const data = GetDeoptimizationData(&deopt_index);
   FixedArray* const literal_array = data->LiteralArray();
 
   TranslationIterator it(data->TranslationByteArray(),
                          data->TranslationIndex(deopt_index)->value());
@@ skipping 82 matching lines @@
       it.Skip(Translation::NumberOfOperandsFor(frame_opcode));
     }
   }
   DCHECK(!is_constructor);
 }
 
 
 int OptimizedFrame::LookupExceptionHandlerInTable(
     int* stack_slots, HandlerTable::CatchPrediction* prediction) {
   Code* code = LookupCode();
-  DCHECK(code->is_optimized_code());
   HandlerTable* table = HandlerTable::cast(code->handler_table());
   int pc_offset = static_cast<int>(pc() - code->entry());
   if (stack_slots) *stack_slots = code->stack_slots();
   return table->LookupReturn(pc_offset, prediction);
 }
 
 
 DeoptimizationInputData* OptimizedFrame::GetDeoptimizationData(
     int* deopt_index) const {
   DCHECK(is_optimized());
@@ skipping 616 matching lines @@
   for (StackFrameIterator it(isolate); !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 }  // namespace internal
 }  // namespace v8