// 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.

#include "include/v8.h"
#include "test/cctest/cctest.h"

#include "include/libplatform/libplatform.h"
#include "src/debug/debug.h"
#include "src/objects-inl.h"
#include "src/trap-handler/trap-handler.h"
#include "test/cctest/print-extension.h"
#include "test/cctest/profiler-extension.h"
#include "test/cctest/trace-extension.h"

#if V8_OS_WIN
#include <windows.h>  // NOLINT
#if V8_CC_MSVC
#include <crtdbg.h>
#endif
#endif

enum InitializationState { kUnset, kUninitialized, kInitialized };
static InitializationState initialization_state_ = kUnset;
static bool disable_automatic_dispose_ = false;

CcTest* CcTest::last_ = nullptr;
bool CcTest::initialize_called_ = false;
v8::base::Atomic32 CcTest::isolate_used_ = 0;
v8::ArrayBuffer::Allocator* CcTest::allocator_ = nullptr;
v8::Isolate* CcTest::isolate_ = nullptr;

CcTest::CcTest(TestFunction* callback, const char* file, const char* name,
               bool enabled, bool initialize)
    : callback_(callback),
      name_(name),
      enabled_(enabled),
      initialize_(initialize),
      prev_(last_) {
  // Find the base name of this test (const_cast required on Windows).
  char *basename = strrchr(const_cast<char *>(file), '/');
  if (!basename) {
    basename = strrchr(const_cast<char *>(file), '\\');
  }
  if (!basename) {
    basename = v8::internal::StrDup(file);
  } else {
    basename = v8::internal::StrDup(basename + 1);
  }
  // Drop the extension, if there is one.
  char *extension = strrchr(basename, '.');
  if (extension) *extension = 0;
  // Install this test in the list of tests
  file_ = basename;
  prev_ = last_;
  last_ = this;
}


void CcTest::Run() {
  if (!initialize_) {
    CHECK_NE(initialization_state_, kInitialized);
    initialization_state_ = kUninitialized;
    CHECK_NULL(CcTest::isolate_);
  } else {
    CHECK_NE(initialization_state_, kUninitialized);
    initialization_state_ = kInitialized;
    if (isolate_ == nullptr) {
      v8::Isolate::CreateParams create_params;
      create_params.array_buffer_allocator = allocator_;
      isolate_ = v8::Isolate::New(create_params);
    }
    isolate_->Enter();
  }
#ifdef DEBUG
  const size_t active_isolates = i::Isolate::non_disposed_isolates();
#endif  // DEBUG
  callback_();
#ifdef DEBUG
  // This DCHECK ensures that all Isolates are properly disposed after finishing
  // the test. Stray Isolates lead to stray tasks in the platform which can
  // interact weirdly when swapping in new platforms (for testing) or during
  // shutdown.
  DCHECK_EQ(active_isolates, i::Isolate::non_disposed_isolates());
#endif  // DEBUG
  if (initialize_) {
    if (v8::Locker::IsActive()) {
      v8::Locker locker(isolate_);
      EmptyMessageQueues(isolate_);
    } else {
      EmptyMessageQueues(isolate_);
    }
    isolate_->Exit();
  }
}

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

void CcTest::CollectGarbage(i::AllocationSpace space) {
  heap()->CollectGarbage(space, i::GarbageCollectionReason::kTesting);
}

void CcTest::CollectAllGarbage(i::Isolate* isolate) {
  i::Isolate* iso = isolate ? isolate : i_isolate();
  iso->heap()->CollectAllGarbage(i::Heap::kNoGCFlags,
                                 i::GarbageCollectionReason::kTesting);
}

void CcTest::CollectAllAvailableGarbage(i::Isolate* isolate) {
  i::Isolate* iso = isolate ? isolate : i_isolate();
  iso->heap()->CollectAllAvailableGarbage(i::GarbageCollectionReason::kTesting);
}

void CcTest::PreciseCollectAllGarbage(i::Isolate* isolate) {
  i::Isolate* iso = isolate ? isolate : i_isolate();
  iso->heap()->PreciseCollectAllGarbage(i::Heap::kNoGCFlags,
                                        i::GarbageCollectionReason::kTesting);
}

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

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

void CcTest::InitializeVM() {
  CHECK(!v8::base::Relaxed_Load(&isolate_used_));
  CHECK(!initialize_called_);
  initialize_called_ = true;
  v8::HandleScope handle_scope(CcTest::isolate());
  v8::Context::New(CcTest::isolate())->Enter();
}

void CcTest::TearDown() {
  if (isolate_ != nullptr) isolate_->Dispose();
}

v8::Local<v8::Context> CcTest::NewContext(CcTestExtensionFlags extension_flags,
                                          v8::Isolate* isolate) {
  const char* extension_names[kMaxExtensions];
  int extension_count = 0;
  for (int i = 0; i < kMaxExtensions; ++i) {
    if (!extension_flags.contains(static_cast<CcTestExtensionId>(i))) continue;
    extension_names[extension_count] = kExtensionName[i];
    ++extension_count;
  }
  v8::ExtensionConfiguration config(extension_count, extension_names);
  v8::Local<v8::Context> context = v8::Context::New(isolate, &config);
  CHECK(!context.IsEmpty());
  return context;
}

void CcTest::DisableAutomaticDispose() {
  CHECK_EQ(kUninitialized, initialization_state_);
  disable_automatic_dispose_ = true;
}

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

void LocalContext::Initialize(v8::Isolate* isolate,
                              v8::ExtensionConfiguration* extensions,
                              v8::Local<v8::ObjectTemplate> global_template,
                              v8::Local<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;
}

// This indirection is needed because HandleScopes cannot be heap-allocated, and
// we don't want any unnecessary #includes in cctest.h.
class InitializedHandleScopeImpl {
 public:
  explicit InitializedHandleScopeImpl(i::Isolate* isolate)
      : handle_scope_(isolate) {}

 private:
  i::HandleScope handle_scope_;
};

InitializedHandleScope::InitializedHandleScope()
    : main_isolate_(CcTest::InitIsolateOnce()),
      initialized_handle_scope_impl_(
          new InitializedHandleScopeImpl(main_isolate_)) {}

InitializedHandleScope::~InitializedHandleScope() = default;

HandleAndZoneScope::HandleAndZoneScope()
    : main_zone_(new i::Zone(&allocator_, ZONE_NAME)) {}

HandleAndZoneScope::~HandleAndZoneScope() = default;

static void PrintTestList(CcTest* current) {
  if (current == nullptr) return;
  PrintTestList(current->prev());
  printf("%s/%s\n", current->file(), current->name());
}


static void SuggestTestHarness(int tests) {
  if (tests == 0) return;
  printf("Running multiple tests in sequence is deprecated and may cause "
         "bogus failure.  Consider using tools/run-tests.py instead.\n");
}


int main(int argc, char* argv[]) {
#if V8_OS_WIN
  UINT new_flags =
      SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX;
  UINT existing_flags = SetErrorMode(new_flags);
  SetErrorMode(existing_flags | new_flags);
#if V8_CC_MSVC
  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
  _set_error_mode(_OUT_TO_STDERR);
#endif  // V8_CC_MSVC
#endif  // V8_OS_WIN

  // hack to print cctest specific flags
  for (int i = 1; i < argc; i++) {
    char* arg = argv[i];
    if ((strcmp(arg, "--help") == 0) || (strcmp(arg, "-h") == 0)) {
      printf("Usage: %s [--list] [[V8_FLAGS] CCTEST]\n", argv[0]);
      printf("\n");
      printf("Options:\n");
      printf("  --list:   list all cctests\n");
      printf("  CCTEST:   cctest identfier returned by --list\n");
      printf("  D8_FLAGS: see d8 output below\n");
      printf("\n\n");
    }
  }

  v8::V8::InitializeICUDefaultLocation(argv[0]);
  std::unique_ptr<v8::Platform> platform(v8::platform::NewDefaultPlatform());
  v8::V8::InitializePlatform(platform.get());
  v8::internal::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
  v8::V8::Initialize();
  v8::V8::InitializeExternalStartupData(argv[0]);

  if (V8_TRAP_HANDLER_SUPPORTED && i::FLAG_wasm_trap_handler) {
    constexpr bool use_default_signal_handler = true;
    CHECK(v8::V8::EnableWebAssemblyTrapHandler(use_default_signal_handler));
  }

  CcTest::set_array_buffer_allocator(
      v8::ArrayBuffer::Allocator::NewDefaultAllocator());

  i::PrintExtension print_extension;
  v8::RegisterExtension(&print_extension);
  i::ProfilerExtension profiler_extension;
  v8::RegisterExtension(&profiler_extension);
  i::TraceExtension trace_extension;
  v8::RegisterExtension(&trace_extension);

  int tests_run = 0;
  bool print_run_count = true;
  for (int i = 1; i < argc; i++) {
    char* arg = argv[i];
    if (strcmp(arg, "--list") == 0) {
      PrintTestList(CcTest::last());
      print_run_count = false;

    } else {
      char* arg_copy = v8::internal::StrDup(arg);
      char* testname = strchr(arg_copy, '/');
      if (testname) {
        // Split the string in two by nulling the slash and then run
        // exact matches.
        *testname = 0;
        char* file = arg_copy;
        char* name = testname + 1;
        CcTest* test = CcTest::last();
        while (test != nullptr) {
          if (test->enabled()
              && strcmp(test->file(), file) == 0
              && strcmp(test->name(), name) == 0) {
            SuggestTestHarness(tests_run++);
            test->Run();
          }
          test = test->prev();
        }

      } else {
        // Run all tests with the specified file or test name.
        char* file_or_name = arg_copy;
        CcTest* test = CcTest::last();
        while (test != nullptr) {
          if (test->enabled()
              && (strcmp(test->file(), file_or_name) == 0
                  || strcmp(test->name(), file_or_name) == 0)) {
            SuggestTestHarness(tests_run++);
            test->Run();
          }
          test = test->prev();
        }
      }
      v8::internal::DeleteArray<char>(arg_copy);
    }
  }
  if (print_run_count && tests_run != 1)
    printf("Ran %i tests.\n", tests_run);
  CcTest::TearDown();
  if (!disable_automatic_dispose_) v8::V8::Dispose();
  v8::V8::ShutdownPlatform();
  return 0;
}

RegisterThreadedTest* RegisterThreadedTest::first_ = nullptr;
int RegisterThreadedTest::count_ = 0;