1    :  // Copyright 2016 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/agent/asan/heap_managers/deferred_free_thread.h"
  16    :  
  17    :  #include <memory>
  18    :  
  19    :  #include "base/bind.h"
  20    :  #include "base/synchronization/waitable_event.h"
  21    :  #include "gtest/gtest.h"
  22    :  
  23    :  namespace agent {
  24    :  namespace asan {
  25    :  namespace heap_managers {
  26    :  
  27    :  namespace {
  28    :  
  29    :  class DeferredFreeThreadTest : public testing::Test {
  30    :   public:
  31  E :    DeferredFreeThreadTest() : nb_callbacks_(0), callback_event_(false, false) {}
  32    :  
  33  E :    void SetUp() override {
  34  E :      deferred_free_thread_.reset(new DeferredFreeThread(
  35    :          base::Bind(&DeferredFreeThreadTest::Callback, base::Unretained(this))));
  36  E :      deferred_free_thread_->Start();
  37  E :    }
  38    :  
  39  E :    void TearDown() override {
  40  E :      deferred_free_thread_->Stop();
  41  E :      deferred_free_thread_.reset();
  42  E :    }
  43    :  
  44  E :    DeferredFreeThread* deferred_free_thread() {
  45  E :      return deferred_free_thread_.get();
  46  E :    }
  47    :  
  48  E :    size_t nb_callbacks() {
  49  E :      base::AutoLock auto_lock(nb_callbacks_lock_);
  50  E :      return nb_callbacks_;
  51  E :    }
  52    :  
  53  E :    void Callback() {
  54  E :      EXPECT_EQ(deferred_free_thread_->deferred_free_thread_id(),
  55    :                base::PlatformThread::CurrentId());
  56  E :      base::AutoLock auto_lock(nb_callbacks_lock_);
  57  E :      ++nb_callbacks_;
  58  E :      callback_event_.Signal();
  59  E :    }
  60    :  
  61  E :    void WaitForCallback() { callback_event_.Wait(); }
  62    :  
  63    :   private:
  64    :    base::Lock nb_callbacks_lock_;
  65    :    size_t nb_callbacks_;
  66    :    std::unique_ptr<DeferredFreeThread> deferred_free_thread_;
  67    :    base::WaitableEvent callback_event_;
  68    :  };
  69    :  
  70    :  }  // namespace
  71    :  
  72  E :  TEST_F(DeferredFreeThreadTest, CallbackSignalingTest) {
  73  E :    EXPECT_EQ(0, nb_callbacks());
  74    :  
  75  E :    deferred_free_thread()->SignalWork();
  76  E :    WaitForCallback();
  77  E :    EXPECT_EQ(1, nb_callbacks());
  78    :  
  79  E :    deferred_free_thread()->SignalWork();
  80  E :    WaitForCallback();
  81  E :    EXPECT_EQ(2, nb_callbacks());
  82    :  
  83  E :    deferred_free_thread()->SignalWork();
  84  E :    WaitForCallback();
  85  E :    EXPECT_EQ(3, nb_callbacks());
  86  E :  }
  87    :  
  88    :  }  // namespace heap_managers
  89    :  }  // namespace asan
  90    :  }  // namespace agent