C++ Handle::Run方法代码示例

v8::Local<v8::Value> ScriptRunner::runCompiledScript(v8::Handle<v8::Script> script, ScriptExecutionContext* context)
{
    if (script.IsEmpty())
        return v8::Local<v8::Value>();

    V8GCController::checkMemoryUsage();
    if (V8RecursionScope::recursionLevel() >= kMaxRecursionDepth)
        return handleMaxRecursionDepthExceeded();

    if (handleOutOfMemory())
        return v8::Local<v8::Value>();

    // Run the script and keep track of the current recursion depth.
    v8::Local<v8::Value> result;
    {
        V8RecursionScope recursionScope(context);
        result = script->Run();
    }

    if (handleOutOfMemory())
        ASSERT(result.IsEmpty());

    if (result.IsEmpty())
        return v8::Local<v8::Value>();

    crashIfV8IsDead();
    return result;
}

v8::Local<v8::Value> WorkerContextExecutionProxy::runScript(v8::Handle<v8::Script> script)
{
    if (script.IsEmpty())
        return v8::Local<v8::Value>();

    // Compute the source string and prevent against infinite recursion.
    if (m_recursion >= kMaxRecursionDepth) {
        v8::Local<v8::String> code = v8ExternalString("throw RangeError('Recursion too deep')");
        script = V8Proxy::compileScript(code, "", 0);
    }

    if (V8Proxy::handleOutOfMemory())
        ASSERT(script.IsEmpty());

    if (script.IsEmpty())
        return v8::Local<v8::Value>();

    // Run the script and keep track of the current recursion depth.
    v8::Local<v8::Value> result;
    {
        m_recursion++;
        result = script->Run();
        m_recursion--;
    }

    // Handle V8 internal error situation (Out-of-memory).
    if (result.IsEmpty())
        return v8::Local<v8::Value>();

    return result;
}

v8::Local<v8::Value> V8ScriptRunner::runCompiledScript(v8::Handle<v8::Script> script, ExecutionContext* context, v8::Isolate* isolate)
{
    TRACE_EVENT0("v8", "v8.run");
    TRACE_EVENT_SCOPED_SAMPLING_STATE("V8", "V8Execution");
    if (script.IsEmpty())
        return v8::Local<v8::Value>();

    if (V8RecursionScope::recursionLevel(isolate) >= kMaxRecursionDepth)
        return handleMaxRecursionDepthExceeded(isolate);

    RELEASE_ASSERT(!context->isIteratingOverObservers());

    // Run the script and keep track of the current recursion depth.
    v8::Local<v8::Value> result;
    {
        V8RecursionScope recursionScope(isolate, context);
        result = script->Run();
    }

    if (result.IsEmpty())
        return v8::Local<v8::Value>();

    crashIfV8IsDead();
    return result;
}

v8::Local<v8::Value> V8Proxy::runScriptInternal(v8::Handle<v8::Script> script, bool isInlineCode)
#endif
{
    if (script.IsEmpty())
        return notHandledByInterceptor();

    V8GCController::checkMemoryUsage();
    // Compute the source string and prevent against infinite recursion.
    if (m_recursion >= kMaxRecursionDepth) {
        v8::Local<v8::String> code = v8ExternalString("throw RangeError('Recursion too deep')");
        // FIXME: Ideally, we should be able to re-use the origin of the
        // script passed to us as the argument instead of using an empty string
        // and 0 baseLine.
        script = compileScript(code, "", 0);
    }

    if (handleOutOfMemory())
        ASSERT(script.IsEmpty());

    if (script.IsEmpty())
        return notHandledByInterceptor();

    // Save the previous value of the inlineCode flag and update the flag for
    // the duration of the script invocation.
    bool previousInlineCode = inlineCode();
    setInlineCode(isInlineCode);

    // Run the script and keep track of the current recursion depth.
    v8::Local<v8::Value> result;
    {
        V8ConsoleMessage::Scope scope;

        // See comment in V8Proxy::callFunction.
        m_frame->keepAlive();

        m_recursion++;
        result = script->Run();
        m_recursion--;
    }

    // Release the storage mutex if applicable.
    releaseStorageMutex();

    if (handleOutOfMemory())
        ASSERT(result.IsEmpty());

    // Handle V8 internal error situation (Out-of-memory).
    if (result.IsEmpty())
        return notHandledByInterceptor();

    // Restore inlineCode flag.
    setInlineCode(previousInlineCode);

    if (v8::V8::IsDead())
        handleFatalErrorInV8();

    return result;
}

AdblockPlus::JsValuePtr AdblockPlus::JsEngine::Evaluate(const std::string& source,
    const std::string& filename)
{
  const JsContext context(shared_from_this());
  const v8::TryCatch tryCatch;
  const v8::Handle<v8::Script> script = CompileScript(isolate, source,
    filename);
  CheckTryCatch(tryCatch);
  v8::Local<v8::Value> result = script->Run();
  CheckTryCatch(tryCatch);
  return JsValuePtr(new JsValue(shared_from_this(), result));
}

v8::Handle<v8::Value>
run(v8::Handle<v8::Script> script, HandleTryCatch handleTryCatch)
{
  assert(!script.IsEmpty());
  assert(v8::Context::InContext());
  
  v8::HandleScope handle_scope;

  v8::TryCatch try_catch;
  v8::Handle<v8::Value> result = script->Run();
  
  if (try_catch.HasCaught()) {
    handleTryCatch(try_catch);
  }
  
  return handle_scope.Close(result);
}

v8::Local<v8::Value> V8Proxy::runScript(v8::Handle<v8::Script> script)
{
    if (script.IsEmpty())
        return v8::Local<v8::Value>();

    V8GCController::checkMemoryUsage();
    if (V8RecursionScope::recursionLevel() >= kMaxRecursionDepth)
        return handleMaxRecursionDepthExceeded();

    if (handleOutOfMemory())
        ASSERT(script.IsEmpty());

    // Keep Frame (and therefore ScriptController and V8Proxy) alive.
    RefPtr<Frame> protect(frame());

    // Run the script and keep track of the current recursion depth.
    v8::Local<v8::Value> result;
    v8::TryCatch tryCatch;
    tryCatch.SetVerbose(true);
    {
        V8RecursionScope recursionScope(frame()->document());
        result = script->Run();
    }

    if (handleOutOfMemory())
        ASSERT(result.IsEmpty());

    // Handle V8 internal error situation (Out-of-memory).
    if (tryCatch.HasCaught()) {
        ASSERT(result.IsEmpty());
        return v8::Local<v8::Value>();
    }

    if (result.IsEmpty())
        return v8::Local<v8::Value>();

    if (v8::V8::IsDead())
        handleFatalErrorInV8();

    return result;
}