One Zone per CompilationInfo.

src/rewriter.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 20 matching lines @@
 
 #include "ast.h"
 #include "compiler.h"
 #include "scopes.h"
 
 namespace v8 {
 namespace internal {
 
 class Processor: public AstVisitor {
  public:
-  explicit Processor(Variable* result)
+  Processor(Variable* result, Zone* zone)
       : result_(result),
         result_assigned_(false),
         is_set_(false),
         in_try_(false),
-        factory_(isolate()) { }
+        factory_(isolate(), zone) { }
 
   virtual ~Processor() { }
 
   void Process(ZoneList<Statement*>* statements);
   bool result_assigned() const { return result_assigned_; }
 
   AstNodeFactory<AstNullVisitor>* factory() {
     return &factory_;
   }
 
@@ skipping 179 matching lines @@
   FunctionLiteral* function = info->function();
   ASSERT(function != NULL);
   Scope* scope = function->scope();
   ASSERT(scope != NULL);
   if (!scope->is_global_scope() && !scope->is_eval_scope()) return true;
 
   ZoneList<Statement*>* body = function->body();
   if (!body->is_empty()) {
     Variable* result = scope->NewTemporary(
         info->isolate()->factory()->result_symbol());
-    Processor processor(result);
+    Processor processor(result, info->zone());
     processor.Process(body);
     if (processor.HasStackOverflow()) return false;
 
     if (processor.result_assigned()) {
       ASSERT(function->end_position() != RelocInfo::kNoPosition);
       // Set the position of the assignment statement one character past the
       // source code, such that it definitely is not in the source code range
       // of an immediate inner scope. For example in
       //   eval('with ({x:1}) x = 1');
       // the end position of the function generated for executing the eval code
       // coincides with the end of the with scope which is the position of '1'.
       int position = function->end_position();
       VariableProxy* result_proxy = processor.factory()->NewVariableProxy(
           result->name(), false, position);
       result_proxy->BindTo(result);
       Statement* result_statement =
           processor.factory()->NewReturnStatement(result_proxy);
       result_statement->set_statement_pos(position);
-      body->Add(result_statement, info->isolate()->zone());
+      body->Add(result_statement, info->zone());
     }
   }
 
   return true;
 }
 
 
 } }  // namespace v8::internal