First step towards splitting a full snapshot into a vm isolate snapshot and a

runtime/vm/benchmark_test.h

 // 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.
 
 #ifndef VM_BENCHMARK_TEST_H_
 #define VM_BENCHMARK_TEST_H_
 
 #include "include/dart_api.h"
 
 #include "vm/dart.h"
 #include "vm/globals.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/zone.h"
 
 namespace dart {
 
 DECLARE_FLAG(int, code_heap_size);
 DECLARE_FLAG(int, old_gen_growth_space_ratio);
 
-// snapshot_buffer points to a snapshot if we link in a snapshot otherwise
-// it is initialized to NULL.
 namespace bin {
-extern const uint8_t* snapshot_buffer;
+// vm_isolate_snapshot_buffer points to a snapshot for the vm isolate if we
+// link in a snapshot otherwise it is initialized to NULL.
+extern const uint8_t* vm_isolate_snapshot_buffer;
+
+// isolate_snapshot_buffer points to a snapshot for an isolate if we link in a
+// snapshot otherwise it is initialized to NULL.
+extern const uint8_t* isolate_snapshot_buffer;
 }
 
 // The BENCHMARK macros are used for benchmarking a specific functionality
 // of the VM.
 #define BENCHMARK_HELPER(name, kind)                                           \
   void Dart_Benchmark##name(Benchmark* benchmark);                             \
   static Benchmark kRegister##name(Dart_Benchmark##name, #name, kind);         \
   static void Dart_BenchmarkHelper##name(Benchmark* benchmark);                \
   void Dart_Benchmark##name(Benchmark* benchmark) {                            \
     FLAG_old_gen_growth_space_ratio = 100;                                     \
@@ skipping 66 matching lines @@
   Dart_Isolate isolate_;
   Benchmark* next_;
 
   DISALLOW_COPY_AND_ASSIGN(Benchmark);
 };
 
 
 class BenchmarkIsolateScope {
  public:
   explicit BenchmarkIsolateScope(Benchmark* benchmark) : benchmark_(benchmark) {
-    benchmark_->CreateIsolate(bin::snapshot_buffer);
+    benchmark_->CreateIsolate(bin::isolate_snapshot_buffer);
     Dart_EnterScope();  // Create a Dart API scope for unit benchmarks.
   }
   ~BenchmarkIsolateScope() {
     Dart_ExitScope();  // Exit the Dart API scope created for unit tests.
     ASSERT(benchmark_->isolate() == Isolate::Current());
     Dart_ShutdownIsolate();
     benchmark_ = NULL;
   }
   Benchmark* benchmark() const { return benchmark_; }
 
  private:
   Benchmark* benchmark_;
 
   DISALLOW_COPY_AND_ASSIGN(BenchmarkIsolateScope);
 };
 
 }  // namespace dart
 
 #endif  // VM_BENCHMARK_TEST_H_