Line data    Source code

       1             : // Copyright 2017 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
       6             : 
       7             : #include "src/api-inl.h"
       8             : #include "src/base/atomic-utils.h"
       9             : #include "src/base/platform/semaphore.h"
      10             : #include "src/compiler.h"
      11             : #include "src/handles.h"
      12             : #include "src/isolate.h"
      13             : #include "src/objects-inl.h"
      14             : #include "src/optimized-compilation-info.h"
      15             : #include "src/parsing/parse-info.h"
      16             : #include "test/unittests/test-helpers.h"
      17             : #include "test/unittests/test-utils.h"
      18             : #include "testing/gtest/include/gtest/gtest.h"
      19             : 
      20             : namespace v8 {
      21             : namespace internal {
      22             : 
      23             : typedef TestWithNativeContext OptimizingCompileDispatcherTest;
      24             : 
      25             : namespace {
      26             : 
      27             : class BlockingCompilationJob : public OptimizedCompilationJob {
      28             :  public:
      29           1 :   BlockingCompilationJob(Isolate* isolate, Handle<JSFunction> function)
      30             :       : OptimizedCompilationJob(isolate->stack_guard()->real_climit(), &info_,
      31             :                                 "BlockingCompilationJob",
      32             :                                 State::kReadyToExecute),
      33             :         shared_(function->shared(), isolate),
      34             :         zone_(isolate->allocator(), ZONE_NAME),
      35             :         info_(&zone_, isolate, shared_, function),
      36             :         blocking_(false),
      37           4 :         semaphore_(0) {}
      38           3 :   ~BlockingCompilationJob() override = default;
      39             : 
      40             :   bool IsBlocking() const { return blocking_.Value(); }
      41           1 :   void Signal() { semaphore_.Signal(); }
      42             : 
      43             :   // OptimiziedCompilationJob implementation.
      44           0 :   Status PrepareJobImpl(Isolate* isolate) override { UNREACHABLE(); }
      45             : 
      46           1 :   Status ExecuteJobImpl() override {
      47             :     blocking_.SetValue(true);
      48           1 :     semaphore_.Wait();
      49             :     blocking_.SetValue(false);
      50           1 :     return SUCCEEDED;
      51             :   }
      52             : 
      53           0 :   Status FinalizeJobImpl(Isolate* isolate) override { return SUCCEEDED; }
      54             : 
      55             :  private:
      56             :   Handle<SharedFunctionInfo> shared_;
      57             :   Zone zone_;
      58             :   OptimizedCompilationInfo info_;
      59             :   base::AtomicValue<bool> blocking_;
      60             :   base::Semaphore semaphore_;
      61             : 
      62             :   DISALLOW_COPY_AND_ASSIGN(BlockingCompilationJob);
      63             : };
      64             : 
      65             : }  // namespace
      66             : 
      67       15444 : TEST_F(OptimizingCompileDispatcherTest, Construct) {
      68           2 :   OptimizingCompileDispatcher dispatcher(i_isolate());
      69           1 :   ASSERT_TRUE(OptimizingCompileDispatcher::Enabled());
      70           1 :   ASSERT_TRUE(dispatcher.IsQueueAvailable());
      71             : }
      72             : 
      73       15444 : TEST_F(OptimizingCompileDispatcherTest, NonBlockingFlush) {
      74             :   Handle<JSFunction> fun =
      75             :       RunJS<JSFunction>("function f() { function g() {}; return g;}; f();");
      76             :   IsCompiledScope is_compiled_scope;
      77           2 :   ASSERT_TRUE(
      78             :       Compiler::Compile(fun, Compiler::CLEAR_EXCEPTION, &is_compiled_scope));
      79           1 :   BlockingCompilationJob* job = new BlockingCompilationJob(i_isolate(), fun);
      80             : 
      81           2 :   OptimizingCompileDispatcher dispatcher(i_isolate());
      82           1 :   ASSERT_TRUE(OptimizingCompileDispatcher::Enabled());
      83           1 :   ASSERT_TRUE(dispatcher.IsQueueAvailable());
      84           1 :   dispatcher.QueueForOptimization(job);
      85             : 
      86             :   // Busy-wait for the job to run on a background thread.
      87     2895204 :   while (!job->IsBlocking()) {
      88             :   }
      89             : 
      90             :   // Should not block.
      91           1 :   dispatcher.Flush(BlockingBehavior::kDontBlock);
      92             : 
      93             :   // Unblock the job & finish.
      94             :   job->Signal();
      95           1 :   dispatcher.Stop();
      96             : }
      97             : 
      98             : }  // namespace internal
      99        9264 : }  // namespace v8