Eliminate 99% of allocated ExceptionHandler objects

runtime/vm/debugger.cc

 // Copyright (c) 2012, 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/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 539 matching lines @@
        frame_index++) {
     ActivationFrame* frame = FrameAt(frame_index);
     intptr_t try_index = frame->TryIndex();
     if (try_index < 0) continue;
     handlers = frame->code().exception_handlers();
     ASSERT(!handlers.IsNull());
     intptr_t num_handlers_checked = 0;
     while (try_index >= 0) {
       // Detect circles in the exception handler data.
       num_handlers_checked++;
-      ASSERT(num_handlers_checked <= handlers.Length());
+      ASSERT(num_handlers_checked <= handlers.num_entries());
       handled_types = handlers.GetHandledTypes(try_index);
       const intptr_t num_types = handled_types.Length();
       for (intptr_t k = 0; k < num_types; k++) {
         type ^= handled_types.At(k);
         ASSERT(!type.IsNull());
         // Uninstantiated types are not added to ExceptionHandlers data.
         ASSERT(type.IsInstantiated());
         if (type.IsDynamicType()) return frame;
         if (type.IsMalformed()) continue;
         if (exc_obj.IsInstanceOf(type, no_instantiator, NULL)) {
@@ skipping 2012 matching lines @@
 }
 
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 }  // namespace dart