Add infrastructure to create and run benchmarks specific to some VM functionality. This is used to …

vm/benchmark_test.h

Index: vm/benchmark_test.h
===================================================================
--- vm/benchmark_test.h	(revision 0)
+++ vm/benchmark_test.h	(revision 0)
@@ -0,0 +1,107 @@
+// 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 {
+
+// The BENCHMARK macro is used for benchmarking a specific functionality
+// of the VM
+#define BENCHMARK(name)                                                        \
+  void Dart_Benchmark##name(Benchmark* benchmark);                             \
+  static const Benchmark kRegister##name(Dart_Benchmark##name, #name);         \
+  static void Dart_BenchmarkHelper##name(Benchmark* benchmark);                \
+  void Dart_Benchmark##name(Benchmark* benchmark) {                            \
+    BenchmarkIsolateScope __isolate__(benchmark);                              \
+    Zone __zone__(benchmark->isolate());                                       \
+    HandleScope __hs__(benchmark->isolate());                                  \
+    Dart_BenchmarkHelper##name(benchmark);                                     \
+  }                                                                            \
+  static void Dart_BenchmarkHelper##name(Benchmark* benchmark)
+
+
+class Benchmark {
+ public:
+  typedef void (RunEntry)(Benchmark* benchmark);
+
+  Benchmark(RunEntry* run, const char* name) :
+      run_(run),
+      name_(name),
+      score_(0),
+      isolate_(NULL),
+      next_(NULL) {
+    if (first_ == NULL) {
+      first_ = this;
+    } else {
+      tail_->next_ = this;
+    }
+    tail_ = this;
+  }
+
+  // Accessors.
+  const char* name() const { return name_; }
+  void set_score(intptr_t value) { score_ = value; }
+  intptr_t score() const { return score_; }
+  Isolate* isolate() const { return reinterpret_cast<Isolate*>(isolate_); }
+
+  Dart_Isolate CreateIsolate(uint8_t* buffer) {
+    char* err = NULL;
+    isolate_ = Dart_CreateIsolate(NULL, buffer, NULL, &err);
+    EXPECT(isolate_ != NULL);
+    free(err);
+    return isolate_;
+  }
+
+  void Run() { (*run_)(this); }
+  void RunBenchmark();
+
+  static void RunAll();
+
+ private:
+  static Benchmark* first_;
+  static Benchmark* tail_;
+
+  RunEntry* const run_;
+  const char* name_;
+  intptr_t score_;
+  Dart_Isolate isolate_;
+  Benchmark* next_;
+
+  DISALLOW_COPY_AND_ASSIGN(Benchmark);
+};
+
+
+class BenchmarkIsolateScope {
+ public:
+  explicit BenchmarkIsolateScope(Benchmark* benchmark) : benchmark_(benchmark) {
+    benchmark_->CreateIsolate(NULL);
+    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_