Make array allocation stub shared between isolates.

runtime/vm/gc_marker.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/gc_marker.h"
 
 #include <map>
 #include <utility>
 #include <vector>
 
@@ skipping 299 matching lines @@
   void DetachCode() {
     intptr_t unoptimized_code_count = 0;
     intptr_t current_code_count = 0;
     for (int i = 0; i < skipped_code_functions_.length(); i++) {
       RawFunction* func = skipped_code_functions_[i];
       RawCode* code = func->ptr()->instructions_->ptr()->code_;
       if (!code->IsMarked()) {
         // If the code wasn't strongly visited through other references
         // after skipping the function's code pointer, then we disconnect the
         // code from the function.
-        StubCode* stub_code = isolate()->stub_code();
         func->StorePointer(
             &(func->ptr()->instructions_),
-            stub_code->LazyCompile_entry()->code()->ptr()->instructions_);
+            StubCode::LazyCompile_entry()->code()->ptr()->instructions_);
         if (FLAG_log_code_drop) {
           // NOTE: This code runs while GC is in progress and runs within
           // a NoHandleScope block. Hence it is not okay to use a regular Zone
           // or Scope handle. We use a direct stack handle so the raw pointer in
           // this handle is not traversed. The use of a handle is mainly to
           // be able to reuse the handle based code and avoid having to add
           // helper functions to the raw object interface.
           String name;
           name = func->ptr()->name_;
           ISL_Print("Detaching code: %s\n", name.ToCString());
@@ skipping 256 matching lines @@
     IterateWeakRoots(isolate, &mark_weak, invoke_api_callbacks);
     mark.Finalize();
     delay_set.ClearReferences();
     ProcessWeakTables(page_space);
     ProcessObjectIdTable(isolate);
   }
   Epilogue(isolate, invoke_api_callbacks);
 }
 
 }  // namespace dart