Add Zone-based handle allocation interface and reduce use of Isolate-based interfaces.

runtime/vm/compiler.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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 924 matching lines @@
     }
     OS::Print("}\n");
   }
 }
 
 
 static RawError* CompileFunctionHelper(CompilationPipeline* pipeline,
                                        const Function& function,
                                        bool optimized,
                                        intptr_t osr_id) {
-  Isolate* isolate = Isolate::Current();
-  StackZone zone(isolate);
+  Thread* thread = Thread::Current();
+  Isolate* isolate = thread->isolate();
+  StackZone stack_zone(isolate);
+  Zone* zone = stack_zone.GetZone();
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     TIMERSCOPE(isolate, time_compilation);
     Timer per_compile_timer(FLAG_trace_compiler, "Compilation time");
     per_compile_timer.Start();
-    ParsedFunction* parsed_function = new(isolate) ParsedFunction(
-        isolate, Function::ZoneHandle(isolate, function.raw()));
+    ParsedFunction* parsed_function = new(zone) ParsedFunction(
+        thread, Function::ZoneHandle(zone, function.raw()));
     if (FLAG_trace_compiler) {
       OS::Print("Compiling %s%sfunction: '%s' @ token %" Pd ", size %" Pd "\n",
                 (osr_id == Isolate::kNoDeoptId ? "" : "osr "),
                 (optimized ? "optimized " : ""),
                 function.ToFullyQualifiedCString(),
                 function.token_pos(),
                 (function.end_token_pos() - function.token_pos()));
     }
     {
       HANDLESCOPE(isolate);
@@ skipping 176 matching lines @@
     isolate->object_store()->clear_sticky_error();
     return error.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 
 
 RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
-  Isolate* isolate = Isolate::Current();
+  Thread* thread = Thread::Current();
+  Isolate* isolate = thread->isolate();
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     if (FLAG_trace_compiler) {
       OS::Print("compiling expression: ");
       AstPrinter::PrintNode(fragment);
     }
 
     // Create a dummy function object for the code generator.
     // The function needs to be associated with a named Class: the interface
     // Function fits the bill.
@@ skipping 12 matching lines @@
     func.set_result_type(Type::Handle(Type::DynamicType()));
     func.set_num_fixed_parameters(0);
     func.SetNumOptionalParameters(0, true);
     // Manually generated AST, do not recompile.
     func.SetIsOptimizable(false);
     func.set_is_debuggable(false);
 
     // We compile the function here, even though InvokeFunction() below
     // would compile func automatically. We are checking fewer invariants
     // here.
-    ParsedFunction* parsed_function = new ParsedFunction(isolate, func);
+    ParsedFunction* parsed_function = new ParsedFunction(thread, func);
     parsed_function->SetNodeSequence(fragment);
     parsed_function->set_default_parameter_values(Object::null_array());
     fragment->scope()->AddVariable(parsed_function->EnsureExpressionTemp());
     fragment->scope()->AddVariable(
         parsed_function->current_context_var());
     parsed_function->AllocateVariables();
 
     // Non-optimized code generator.
     DartCompilationPipeline pipeline;
     CompileParsedFunctionHelper(&pipeline,
                                 parsed_function,
                                 false,
                                 Isolate::kNoDeoptId);
 
     const Object& result = PassiveObject::Handle(
         DartEntry::InvokeFunction(func, Object::empty_array()));
     return result.raw();
   } else {
     const Object& result =
       PassiveObject::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart