// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef CCTEST_H_
#define CCTEST_H_

#include "include/libplatform/libplatform.h"
#include "src/v8.h"

#ifndef TEST
#define TEST(Name)                                                             \
  static void Test##Name();                                                    \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, NULL, true, true);  \
  static void Test##Name()
#endif

#ifndef UNINITIALIZED_TEST
#define UNINITIALIZED_TEST(Name)                                               \
  static void Test##Name();                                                    \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, NULL, true, false); \
  static void Test##Name()
#endif

#ifndef DEPENDENT_TEST
#define DEPENDENT_TEST(Name, Dep)                                              \
  static void Test##Name();                                                    \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, #Dep, true, true);  \
  static void Test##Name()
#endif

#ifndef UNINITIALIZED_DEPENDENT_TEST
#define UNINITIALIZED_DEPENDENT_TEST(Name, Dep)                                \
  static void Test##Name();                                                    \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, #Dep, true, false); \
  static void Test##Name()
#endif

#ifndef DISABLED_TEST
#define DISABLED_TEST(Name)                                                    \
  static void Test##Name();                                                    \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, NULL, false, true); \
  static void Test##Name()
#endif

#define EXTENSION_LIST(V)                                                      \
  V(GC_EXTENSION,       "v8/gc")                                               \
  V(PRINT_EXTENSION,    "v8/print")                                            \
  V(PROFILER_EXTENSION, "v8/profiler")                                         \
  V(TRACE_EXTENSION,    "v8/trace")

#define DEFINE_EXTENSION_ID(Name, Ident) Name##_ID,
enum CcTestExtensionIds {
  EXTENSION_LIST(DEFINE_EXTENSION_ID)
  kMaxExtensions
};
#undef DEFINE_EXTENSION_ID

typedef v8::internal::EnumSet<CcTestExtensionIds> CcTestExtensionFlags;
#define DEFINE_EXTENSION_FLAG(Name, Ident)                               \
  static const CcTestExtensionFlags Name(1 << Name##_ID);
  static const CcTestExtensionFlags NO_EXTENSIONS(0);
  static const CcTestExtensionFlags ALL_EXTENSIONS((1 << kMaxExtensions) - 1);
  EXTENSION_LIST(DEFINE_EXTENSION_FLAG)
#undef DEFINE_EXTENSION_FLAG


// Use this to expose protected methods in i::Heap.
class TestHeap : public i::Heap {
 public:
  using i::Heap::AllocateByteArray;
  using i::Heap::AllocateFixedArray;
  using i::Heap::AllocateHeapNumber;
  using i::Heap::AllocateFloat32x4;
  using i::Heap::AllocateJSObject;
  using i::Heap::AllocateJSObjectFromMap;
  using i::Heap::AllocateMap;
  using i::Heap::CopyCode;
  using i::Heap::kInitialNumberStringCacheSize;
};


class CcTest {
 public:
  typedef void (TestFunction)();
  CcTest(TestFunction* callback, const char* file, const char* name,
         const char* dependency, bool enabled, bool initialize);
  void Run();
  static CcTest* last() { return last_; }
  CcTest* prev() { return prev_; }
  const char* file() { return file_; }
  const char* name() { return name_; }
  const char* dependency() { return dependency_; }
  bool enabled() { return enabled_; }

  static v8::Isolate* isolate() {
    CHECK(isolate_ != NULL);
    v8::base::NoBarrier_Store(&isolate_used_, 1);
    return isolate_;
  }

  static i::Isolate* InitIsolateOnce() {
    if (!initialize_called_) InitializeVM();
    return i_isolate();
  }

  static i::Isolate* i_isolate() {
    return reinterpret_cast<i::Isolate*>(isolate());
  }

  static i::Heap* heap() {
    return i_isolate()->heap();
  }

  static TestHeap* test_heap() {
    return reinterpret_cast<TestHeap*>(i_isolate()->heap());
  }

  static v8::base::RandomNumberGenerator* random_number_generator() {
    return InitIsolateOnce()->random_number_generator();
  }

  static v8::Local<v8::Object> global() {
    return isolate()->GetCurrentContext()->Global();
  }

  static v8::ArrayBuffer::Allocator* array_buffer_allocator() {
    return allocator_;
  }

  static void set_array_buffer_allocator(
      v8::ArrayBuffer::Allocator* allocator) {
    allocator_ = allocator;
  }

  // TODO(dcarney): Remove.
  // This must be called first in a test.
  static void InitializeVM() {
    CHECK(!v8::base::NoBarrier_Load(&isolate_used_));
    CHECK(!initialize_called_);
    initialize_called_ = true;
    v8::HandleScope handle_scope(CcTest::isolate());
    v8::Context::New(CcTest::isolate())->Enter();
  }

  // Only for UNINITIALIZED_TESTs
  static void DisableAutomaticDispose();

  // Helper function to configure a context.
  // Must be in a HandleScope.
  static v8::Local<v8::Context> NewContext(
      CcTestExtensionFlags extensions,
      v8::Isolate* isolate = CcTest::isolate());

  static void TearDown() {
    if (isolate_ != NULL) isolate_->Dispose();
  }

 private:
  friend int main(int argc, char** argv);
  TestFunction* callback_;
  const char* file_;
  const char* name_;
  const char* dependency_;
  bool enabled_;
  bool initialize_;
  CcTest* prev_;
  static CcTest* last_;
  static v8::ArrayBuffer::Allocator* allocator_;
  static v8::Isolate* isolate_;
  static bool initialize_called_;
  static v8::base::Atomic32 isolate_used_;
};

// Switches between all the Api tests using the threading support.
// In order to get a surprising but repeatable pattern of thread
// switching it has extra semaphores to control the order in which
// the tests alternate, not relying solely on the big V8 lock.
//
// A test is augmented with calls to ApiTestFuzzer::Fuzz() in its
// callbacks.  This will have no effect when we are not running the
// thread fuzzing test.  In the thread fuzzing test it will
// pseudorandomly select a successor thread and switch execution
// to that thread, suspending the current test.
class ApiTestFuzzer: public v8::base::Thread {
 public:
  void CallTest();

  // The ApiTestFuzzer is also a Thread, so it has a Run method.
  virtual void Run();

  enum PartOfTest { FIRST_PART,
                    SECOND_PART,
                    THIRD_PART,
                    FOURTH_PART,
                    LAST_PART = FOURTH_PART };

  static void SetUp(PartOfTest part);
  static void RunAllTests();
  static void TearDown();
  // This method switches threads if we are running the Threading test.
  // Otherwise it does nothing.
  static void Fuzz();

 private:
  explicit ApiTestFuzzer(int num)
      : Thread(Options("ApiTestFuzzer")),
        test_number_(num),
        gate_(0),
        active_(true) {}
  ~ApiTestFuzzer() {}

  static bool fuzzing_;
  static int tests_being_run_;
  static int current_;
  static int active_tests_;
  static bool NextThread();
  int test_number_;
  v8::base::Semaphore gate_;
  bool active_;
  void ContextSwitch();
  static int GetNextTestNumber();
  static v8::base::Semaphore all_tests_done_;
};


#define THREADED_TEST(Name)                                          \
  static void Test##Name();                                          \
  RegisterThreadedTest register_##Name(Test##Name, #Name);           \
  /* */ TEST(Name)


class RegisterThreadedTest {
 public:
  explicit RegisterThreadedTest(CcTest::TestFunction* callback,
                                const char* name)
      : fuzzer_(NULL), callback_(callback), name_(name) {
    prev_ = first_;
    first_ = this;
    count_++;
  }
  static int count() { return count_; }
  static RegisterThreadedTest* nth(int i) {
    CHECK(i < count());
    RegisterThreadedTest* current = first_;
    while (i > 0) {
      i--;
      current = current->prev_;
    }
    return current;
  }
  CcTest::TestFunction* callback() { return callback_; }
  ApiTestFuzzer* fuzzer_;
  const char* name() { return name_; }

 private:
  static RegisterThreadedTest* first_;
  static int count_;
  CcTest::TestFunction* callback_;
  RegisterThreadedTest* prev_;
  const char* name_;
};

// A LocalContext holds a reference to a v8::Context.
class LocalContext {
 public:
  LocalContext(v8::Isolate* isolate,
               v8::ExtensionConfiguration* extensions = 0,
               v8::Handle<v8::ObjectTemplate> global_template =
                   v8::Handle<v8::ObjectTemplate>(),
               v8::Handle<v8::Value> global_object = v8::Handle<v8::Value>()) {
    Initialize(isolate, extensions, global_template, global_object);
  }

  LocalContext(v8::ExtensionConfiguration* extensions = 0,
               v8::Handle<v8::ObjectTemplate> global_template =
                   v8::Handle<v8::ObjectTemplate>(),
               v8::Handle<v8::Value> global_object = v8::Handle<v8::Value>()) {
    Initialize(CcTest::isolate(), extensions, global_template, global_object);
  }

  virtual ~LocalContext() {
    v8::HandleScope scope(isolate_);
    v8::Local<v8::Context>::New(isolate_, context_)->Exit();
    context_.Reset();
  }

  v8::Context* operator->() {
    return *reinterpret_cast<v8::Context**>(&context_);
  }
  v8::Context* operator*() { return operator->(); }
  bool IsReady() { return !context_.IsEmpty(); }

  v8::Local<v8::Context> local() {
    return v8::Local<v8::Context>::New(isolate_, context_);
  }

 private:
  void Initialize(v8::Isolate* isolate,
                  v8::ExtensionConfiguration* extensions,
                  v8::Handle<v8::ObjectTemplate> global_template,
                  v8::Handle<v8::Value> global_object) {
     v8::HandleScope scope(isolate);
     v8::Local<v8::Context> context = v8::Context::New(isolate,
                                                       extensions,
                                                       global_template,
                                                       global_object);
     context_.Reset(isolate, context);
     context->Enter();
     // We can't do this later perhaps because of a fatal error.
     isolate_ = isolate;
  }

  v8::Persistent<v8::Context> context_;
  v8::Isolate* isolate_;
};


static inline uint16_t* AsciiToTwoByteString(const char* source) {
  int array_length = i::StrLength(source) + 1;
  uint16_t* converted = i::NewArray<uint16_t>(array_length);
  for (int i = 0; i < array_length; i++) converted[i] = source[i];
  return converted;
}


static inline v8::Local<v8::Value> v8_num(double x) {
  return v8::Number::New(v8::Isolate::GetCurrent(), x);
}


static inline v8::Local<v8::String> v8_str(const char* x) {
  return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), x);
}


static inline v8::Local<v8::Symbol> v8_symbol(const char* name) {
  return v8::Symbol::New(v8::Isolate::GetCurrent(), v8_str(name));
}


static inline v8::Local<v8::Script> v8_compile(const char* x) {
  return v8::Script::Compile(v8_str(x));
}


static inline v8::Local<v8::Script> v8_compile(v8::Local<v8::String> x) {
  return v8::Script::Compile(x);
}


static inline v8::Local<v8::Script> CompileWithOrigin(
    v8::Local<v8::String> source, v8::Local<v8::String> origin_url) {
  v8::ScriptOrigin origin(origin_url);
  v8::ScriptCompiler::Source script_source(source, origin);
  return v8::ScriptCompiler::Compile(
      v8::Isolate::GetCurrent(), &script_source);
}


static inline v8::Local<v8::Script> CompileWithOrigin(
    v8::Local<v8::String> source, const char* origin_url) {
  return CompileWithOrigin(source, v8_str(origin_url));
}


static inline v8::Local<v8::Script> CompileWithOrigin(const char* source,
                                                      const char* origin_url) {
  return CompileWithOrigin(v8_str(source), v8_str(origin_url));
}


// Helper functions that compile and run the source.
static inline v8::Local<v8::Value> CompileRun(const char* source) {
  return v8::Script::Compile(v8_str(source))->Run();
}


// Helper functions that compile and run the source.
static inline v8::MaybeLocal<v8::Value> CompileRun(
    v8::Local<v8::Context> context, const char* source) {
  return v8::Script::Compile(v8_str(source))->Run(context);
}


// Compiles source as an ES6 module.
static inline v8::Local<v8::Value> CompileRunModule(const char* source) {
  v8::ScriptCompiler::Source script_source(v8_str(source));
  return v8::ScriptCompiler::CompileModule(v8::Isolate::GetCurrent(),
                                           &script_source)->Run();
}


static inline v8::Local<v8::Value> CompileRun(v8::Local<v8::String> source) {
  return v8::Script::Compile(source)->Run();
}


static inline v8::Local<v8::Value> ParserCacheCompileRun(const char* source) {
  // Compile once just to get the preparse data, then compile the second time
  // using the data.
  v8::Isolate* isolate = v8::Isolate::GetCurrent();
  v8::ScriptCompiler::Source script_source(v8_str(source));
  v8::ScriptCompiler::Compile(isolate, &script_source,
                              v8::ScriptCompiler::kProduceParserCache);

  // Check whether we received cached data, and if so use it.
  v8::ScriptCompiler::CompileOptions options =
      script_source.GetCachedData() ? v8::ScriptCompiler::kConsumeParserCache
                                    : v8::ScriptCompiler::kNoCompileOptions;

  return v8::ScriptCompiler::Compile(isolate, &script_source, options)->Run();
}


// Helper functions that compile and run the source with given origin.
static inline v8::Local<v8::Value> CompileRunWithOrigin(const char* source,
                                                        const char* origin_url,
                                                        int line_number,
                                                        int column_number) {
  v8::Isolate* isolate = v8::Isolate::GetCurrent();
  v8::ScriptOrigin origin(v8_str(origin_url),
                          v8::Integer::New(isolate, line_number),
                          v8::Integer::New(isolate, column_number));
  v8::ScriptCompiler::Source script_source(v8_str(source), origin);
  return v8::ScriptCompiler::Compile(isolate, &script_source)->Run();
}


static inline v8::Local<v8::Value> CompileRunWithOrigin(
    v8::Local<v8::String> source, const char* origin_url) {
  v8::ScriptCompiler::Source script_source(
      source, v8::ScriptOrigin(v8_str(origin_url)));
  return v8::ScriptCompiler::Compile(v8::Isolate::GetCurrent(), &script_source)
      ->Run();
}


static inline v8::Local<v8::Value> CompileRunWithOrigin(
    const char* source, const char* origin_url) {
  return CompileRunWithOrigin(v8_str(source), origin_url);
}



static inline void ExpectString(const char* code, const char* expected) {
  v8::Local<v8::Value> result = CompileRun(code);
  CHECK(result->IsString());
  v8::String::Utf8Value utf8(result);
  CHECK_EQ(0, strcmp(expected, *utf8));
}


static inline void ExpectInt32(const char* code, int expected) {
  v8::Local<v8::Value> result = CompileRun(code);
  CHECK(result->IsInt32());
  CHECK_EQ(expected, result->Int32Value());
}


static inline void ExpectBoolean(const char* code, bool expected) {
  v8::Local<v8::Value> result = CompileRun(code);
  CHECK(result->IsBoolean());
  CHECK_EQ(expected, result->BooleanValue());
}


static inline void ExpectTrue(const char* code) {
  ExpectBoolean(code, true);
}


static inline void ExpectFalse(const char* code) {
  ExpectBoolean(code, false);
}


static inline void ExpectObject(const char* code,
                                v8::Local<v8::Value> expected) {
  v8::Local<v8::Value> result = CompileRun(code);
  CHECK(result->SameValue(expected));
}


static inline void ExpectUndefined(const char* code) {
  v8::Local<v8::Value> result = CompileRun(code);
  CHECK(result->IsUndefined());
}


// Helper function that simulates a full new-space in the heap.
static inline bool FillUpOnePage(v8::internal::NewSpace* space) {
  v8::internal::AllocationResult allocation = space->AllocateRawUnaligned(
      v8::internal::Page::kMaxRegularHeapObjectSize);
  if (allocation.IsRetry()) return false;
  v8::internal::HeapObject* free_space = NULL;
  CHECK(allocation.To(&free_space));
  space->heap()->CreateFillerObjectAt(
      free_space->address(), v8::internal::Page::kMaxRegularHeapObjectSize);
  return true;
}


// Helper function that simulates a fill new-space in the heap.
static inline void AllocateAllButNBytes(v8::internal::NewSpace* space,
                                        int extra_bytes) {
  int space_remaining = static_cast<int>(*space->allocation_limit_address() -
                                         *space->allocation_top_address());
  CHECK(space_remaining >= extra_bytes);
  int new_linear_size = space_remaining - extra_bytes;
  if (new_linear_size == 0) return;
  v8::internal::AllocationResult allocation =
      space->AllocateRawUnaligned(new_linear_size);
  v8::internal::HeapObject* free_space = NULL;
  CHECK(allocation.To(&free_space));
  space->heap()->CreateFillerObjectAt(free_space->address(), new_linear_size);
}


static inline void FillCurrentPage(v8::internal::NewSpace* space) {
  AllocateAllButNBytes(space, 0);
}


static inline void SimulateFullSpace(v8::internal::NewSpace* space) {
  FillCurrentPage(space);
  while (FillUpOnePage(space)) {
  }
}


// Helper function that simulates a full old-space in the heap.
static inline void SimulateFullSpace(v8::internal::PagedSpace* space) {
  space->EmptyAllocationInfo();
  space->ResetFreeList();
  space->ClearStats();
}


// Helper function that simulates many incremental marking steps until
// marking is completed.
static inline void SimulateIncrementalMarking(i::Heap* heap) {
  i::MarkCompactCollector* collector = heap->mark_compact_collector();
  i::IncrementalMarking* marking = heap->incremental_marking();
  if (collector->sweeping_in_progress()) {
    collector->EnsureSweepingCompleted();
  }
  CHECK(marking->IsMarking() || marking->IsStopped());
  if (marking->IsStopped()) {
    marking->Start(i::Heap::kNoGCFlags);
  }
  CHECK(marking->IsMarking());
  while (!marking->IsComplete()) {
    marking->Step(i::MB, i::IncrementalMarking::NO_GC_VIA_STACK_GUARD);
    if (marking->IsReadyToOverApproximateWeakClosure()) {
      marking->MarkObjectGroups();
    }
  }
  CHECK(marking->IsComplete());
}


static void DummyDebugEventListener(
    const v8::Debug::EventDetails& event_details) {}


static inline void EnableDebugger() {
  v8::Debug::SetDebugEventListener(&DummyDebugEventListener);
}


static inline void DisableDebugger() { v8::Debug::SetDebugEventListener(NULL); }


static inline void EmptyMessageQueues(v8::Isolate* isolate) {
  while (v8::platform::PumpMessageLoop(v8::internal::V8::GetCurrentPlatform(),
                                       isolate))
    ;
}


// Helper class for new allocations tracking and checking.
// To use checking of JS allocations tracking in a test,
// just create an instance of this class.
class HeapObjectsTracker {
 public:
  HeapObjectsTracker() {
    heap_profiler_ = i::Isolate::Current()->heap_profiler();
    CHECK_NOT_NULL(heap_profiler_);
    heap_profiler_->StartHeapObjectsTracking(true);
  }

  ~HeapObjectsTracker() {
    i::Isolate::Current()->heap()->CollectAllAvailableGarbage();
    CHECK_EQ(0, heap_profiler_->heap_object_map()->FindUntrackedObjects());
    heap_profiler_->StopHeapObjectsTracking();
  }

 private:
  i::HeapProfiler* heap_profiler_;
};


class InitializedHandleScope {
 public:
  InitializedHandleScope()
      : main_isolate_(CcTest::InitIsolateOnce()),
        handle_scope_(main_isolate_) {}

  // Prefixing the below with main_ reduces a lot of naming clashes.
  i::Isolate* main_isolate() { return main_isolate_; }

 private:
  i::Isolate* main_isolate_;
  i::HandleScope handle_scope_;
};


class HandleAndZoneScope : public InitializedHandleScope {
 public:
  HandleAndZoneScope() {}

  // Prefixing the below with main_ reduces a lot of naming clashes.
  i::Zone* main_zone() { return &main_zone_; }

 private:
  i::Zone main_zone_;
};

#endif  // ifndef CCTEST_H_