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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
#include "src/api/api-inl.h"
#include "src/base/atomic-utils.h"
#include "src/base/platform/semaphore.h"
#include "src/codegen/compiler.h"
#include "src/codegen/optimized-compilation-info.h"
#include "src/execution/isolate.h"
#include "src/handles/handles.h"
#include "src/objects/objects-inl.h"
#include "src/parsing/parse-info.h"
#include "test/unittests/test-helpers.h"
#include "test/unittests/test-utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace v8 {
namespace internal {
using OptimizingCompileDispatcherTest = TestWithNativeContext;
namespace {
class BlockingCompilationJob : public OptimizedCompilationJob {
public:
BlockingCompilationJob(Isolate* isolate, Handle<JSFunction> function)
: OptimizedCompilationJob(isolate->stack_guard()->real_climit(), &info_,
"BlockingCompilationJob",
State::kReadyToExecute),
shared_(function->shared(), isolate),
zone_(isolate->allocator(), ZONE_NAME),
info_(&zone_, isolate, shared_, function),
blocking_(false),
semaphore_(0) {}
~BlockingCompilationJob() override = default;
bool IsBlocking() const { return blocking_.Value(); }
void Signal() { semaphore_.Signal(); }
// OptimiziedCompilationJob implementation.
Status PrepareJobImpl(Isolate* isolate) override { UNREACHABLE(); }
Status ExecuteJobImpl() override {
blocking_.SetValue(true);
semaphore_.Wait();
blocking_.SetValue(false);
return SUCCEEDED;
}
Status FinalizeJobImpl(Isolate* isolate) override { return SUCCEEDED; }
private:
Handle<SharedFunctionInfo> shared_;
Zone zone_;
OptimizedCompilationInfo info_;
base::AtomicValue<bool> blocking_;
base::Semaphore semaphore_;
DISALLOW_COPY_AND_ASSIGN(BlockingCompilationJob);
};
} // namespace
TEST_F(OptimizingCompileDispatcherTest, Construct) {
OptimizingCompileDispatcher dispatcher(i_isolate());
ASSERT_TRUE(OptimizingCompileDispatcher::Enabled());
ASSERT_TRUE(dispatcher.IsQueueAvailable());
}
TEST_F(OptimizingCompileDispatcherTest, NonBlockingFlush) {
Handle<JSFunction> fun =
RunJS<JSFunction>("function f() { function g() {}; return g;}; f();");
IsCompiledScope is_compiled_scope;
ASSERT_TRUE(
Compiler::Compile(fun, Compiler::CLEAR_EXCEPTION, &is_compiled_scope));
BlockingCompilationJob* job = new BlockingCompilationJob(i_isolate(), fun);
OptimizingCompileDispatcher dispatcher(i_isolate());
ASSERT_TRUE(OptimizingCompileDispatcher::Enabled());
ASSERT_TRUE(dispatcher.IsQueueAvailable());
dispatcher.QueueForOptimization(job);
// Busy-wait for the job to run on a background thread.
while (!job->IsBlocking()) {
}
// Should not block.
dispatcher.Flush(BlockingBehavior::kDontBlock);
// Unblock the job & finish.
job->Signal();
dispatcher.Stop();
}
} // namespace internal
} // namespace v8
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