Implement spawnFunction from the new isolate api.

runtime/vm/object.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/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 7379 matching lines @@
       symbol = String::SubString(str, begin_index, len, Heap::kOld);
     }
     symbol.SetHash(hash);
     InsertIntoSymbolTable(symbol_table, symbol, index, table_size);
   }
   ASSERT(symbol.IsSymbol());
   return symbol.raw();
 }
 
 
+RawString* String::NewFormatted(const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  intptr_t len = OS::VSNPrint(NULL, 0, format, args);
+  va_end(args);
+
+  Zone* zone = Isolate::Current()->current_zone();
+  char* buffer = reinterpret_cast<char*>(zone->Allocate(len + 1));
+  va_list args2;
+  va_start(args2, format);
+  OS::VSNPrint(buffer, (len + 1), format, args2);
+  va_end(args2);
+
+  return String::New(buffer);
+}
+
+
 RawString* String::Concat(const String& str1,
                           const String& str2,
                           Heap::Space space) {
   ASSERT(!str1.IsNull() && !str2.IsNull());
   intptr_t char_size = Utils::Maximum(str1.CharSize(), str2.CharSize());
   if (char_size == kFourByteChar) {
     return FourByteString::Concat(str1, str2, space);
   }
   if (char_size == kTwoByteChar) {
     return TwoByteString::Concat(str1, str2, space);
@@ skipping 1426 matching lines @@
   result.set_num_args_tested(num_args_tested);
   // Number of array elements in one test entry (num_args_tested + 1)
   intptr_t len = result.TestEntryLength();
   // IC data array must be null terminated (sentinel entry).
   const Array& ic_data = Array::Handle(Array::New(len, Heap::kOld));
   result.set_ic_data(ic_data);
   return result.raw();
 }
 
 }  // namespace dart