[typedarrays] Check detached buffer at start of typed array methods

src/crankshaft/hydrogen.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/crankshaft/hydrogen.h"
 
 #include <memory>
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
@@ skipping 9906 matching lines @@
   NoObservableSideEffectsScope scope(this);
   DCHECK(expr->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(expr->arguments()->at(0)));
   HValue* view = Pop();
 
   return ast_context()->ReturnValue(BuildArrayBufferViewFieldAccessor(
       view, nullptr,
       FieldIndex::ForInObjectOffset(JSArrayBufferView::kByteOffsetOffset)));
 }
 
+void HOptimizedGraphBuilder::GenerateArrayBufferViewWasNeutered(
+    CallRuntime* expr) {
+  NoObservableSideEffectsScope scope(this);
+  DCHECK_EQ(expr->arguments()->length(), 1);
+  CHECK_ALIVE(VisitForValue(expr->arguments()->at(0)));
+  HValue* view = Pop();
+
+  HInstruction* buffer = Add<HLoadNamedField>(
+      view, nullptr, HObjectAccess::ForJSArrayBufferViewBuffer());
+  HInstruction* flags = Add<HLoadNamedField>(
+      buffer, nullptr, HObjectAccess::ForJSArrayBufferBitField());
+  HValue* was_neutered_mask =
+      Add<HConstant>(1 << JSArrayBuffer::WasNeutered::kShift);
+  HValue* was_neutered =
+      AddUncasted<HBitwise>(Token::BIT_AND, flags, was_neutered_mask);
+  return ast_context()->ReturnValue(was_neutered);
+}
 
 void HOptimizedGraphBuilder::GenerateTypedArrayGetLength(
     CallRuntime* expr) {
   NoObservableSideEffectsScope scope(this);
   DCHECK(expr->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(expr->arguments()->at(0)));
   HValue* view = Pop();
 
   return ast_context()->ReturnValue(BuildArrayBufferViewFieldAccessor(
       view, nullptr,
@@ skipping 2798 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8