Initial SIMDBC interpreter.

runtime/vm/isolate.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 239 matching lines @@
   // an interrupt is guaranteed to be observed eventually, but any further
   // order guarantees must be ensured by other synchronization. See the
   // tests in isolate_test.cc for example usage.
   bool HasInterruptsScheduled(uword interrupt_bits) {
     ASSERT(interrupt_bits == (interrupt_bits & kInterruptsMask));
     uword limit = AtomicOperations::LoadRelaxed(&stack_limit_);
     return (limit != saved_stack_limit_) &&
         (((limit & kInterruptsMask) & interrupt_bits) != 0);
   }
 
+#if defined(TARGET_ARCH_DBC)
+  // Access to the current stack limit for DBC interpreter.
+  uword stack_limit() const {
+    return stack_limit_;
+  }
+#endif
+
   // Access to the current stack limit for generated code.  This may be
   // overwritten with a special value to trigger interrupts.
   uword stack_limit_address() const {
     return reinterpret_cast<uword>(&stack_limit_);
   }
   static intptr_t stack_limit_offset() {
     return OFFSET_OF(Isolate, stack_limit_);
   }
 
   // The true stack limit for this isolate.
@@ skipping 760 matching lines @@
   intptr_t* spawn_count_;
 
   Dart_IsolateFlags isolate_flags_;
   bool paused_;
   bool errors_are_fatal_;
 };
 
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_