yeet

node_modules/react-native/ReactCommon/jsiexecutor/jsireact/JSIExecutor.cpp

@@ -0,0 +1,515 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "jsireact/JSIExecutor.h"
+
+#include <cxxreact/JSBigString.h>
+#include <cxxreact/ModuleRegistry.h>
+#include <cxxreact/ReactMarker.h>
+#include <cxxreact/SystraceSection.h>
+#include <folly/Conv.h>
+#include <folly/json.h>
+#include <glog/logging.h>
+#include <jsi/JSIDynamic.h>
+#include <jsi/instrumentation.h>
+
+#include <sstream>
+#include <stdexcept>
+
+using namespace facebook::jsi;
+
+namespace facebook {
+namespace react {
+
+class JSIExecutor::NativeModuleProxy : public jsi::HostObject {
+ public:
+  NativeModuleProxy(std::shared_ptr<JSINativeModules> nativeModules)
+      : weakNativeModules_(nativeModules) {}
+
+  Value get(Runtime &rt, const PropNameID &name) override {
+    if (name.utf8(rt) == "name") {
+      return jsi::String::createFromAscii(rt, "NativeModules");
+    }
+
+    auto nativeModules = weakNativeModules_.lock();
+    if (!nativeModules) {
+      return nullptr;
+    }
+
+    return nativeModules->getModule(rt, name);
+  }
+
+  void set(Runtime &, const PropNameID &, const Value &) override {
+    throw std::runtime_error(
+        "Unable to put on NativeModules: Operation unsupported");
+  }
+
+ private:
+  std::weak_ptr<JSINativeModules> weakNativeModules_;
+};
+
+namespace {
+
+// basename_r isn't in all iOS SDKs, so use this simple version instead.
+std::string simpleBasename(const std::string &path) {
+  size_t pos = path.rfind("/");
+  return (pos != std::string::npos) ? path.substr(pos) : path;
+}
+
+} // namespace
+
+JSIExecutor::JSIExecutor(
+    std::shared_ptr<jsi::Runtime> runtime,
+    std::shared_ptr<ExecutorDelegate> delegate,
+    const JSIScopedTimeoutInvoker &scopedTimeoutInvoker,
+    RuntimeInstaller runtimeInstaller)
+    : runtime_(runtime),
+      delegate_(delegate),
+      nativeModules_(std::make_shared<JSINativeModules>(
+          delegate ? delegate->getModuleRegistry() : nullptr)),
+      scopedTimeoutInvoker_(scopedTimeoutInvoker),
+      runtimeInstaller_(runtimeInstaller) {
+  runtime_->global().setProperty(
+      *runtime, "__jsiExecutorDescription", runtime->description());
+}
+
+void JSIExecutor::initializeRuntime() {
+  SystraceSection s("JSIExecutor::initializeRuntime");
+  runtime_->global().setProperty(
+      *runtime_,
+      "nativeModuleProxy",
+      Object::createFromHostObject(
+          *runtime_, std::make_shared<NativeModuleProxy>(nativeModules_)));
+
+  runtime_->global().setProperty(
+      *runtime_,
+      "nativeFlushQueueImmediate",
+      Function::createFromHostFunction(
+          *runtime_,
+          PropNameID::forAscii(*runtime_, "nativeFlushQueueImmediate"),
+          1,
+          [this](
+              jsi::Runtime &,
+              const jsi::Value &,
+              const jsi::Value *args,
+              size_t count) {
+            if (count != 1) {
+              throw std::invalid_argument(
+                  "nativeFlushQueueImmediate arg count must be 1");
+            }
+            callNativeModules(args[0], false);
+            return Value::undefined();
+          }));
+
+  runtime_->global().setProperty(
+      *runtime_,
+      "nativeCallSyncHook",
+      Function::createFromHostFunction(
+          *runtime_,
+          PropNameID::forAscii(*runtime_, "nativeCallSyncHook"),
+          1,
+          [this](
+              jsi::Runtime &,
+              const jsi::Value &,
+              const jsi::Value *args,
+              size_t count) { return nativeCallSyncHook(args, count); }));
+
+#if DEBUG
+  runtime_->global().setProperty(
+      *runtime_,
+      "globalEvalWithSourceUrl",
+      Function::createFromHostFunction(
+          *runtime_,
+          PropNameID::forAscii(*runtime_, "globalEvalWithSourceUrl"),
+          1,
+          [this](
+              jsi::Runtime &,
+              const jsi::Value &,
+              const jsi::Value *args,
+              size_t count) { return globalEvalWithSourceUrl(args, count); }));
+#endif
+
+  if (runtimeInstaller_) {
+    runtimeInstaller_(*runtime_);
+  }
+  bool hasLogger(ReactMarker::logTaggedMarker);
+  if (hasLogger) {
+    ReactMarker::logMarker(ReactMarker::CREATE_REACT_CONTEXT_STOP);
+  }
+}
+
+void JSIExecutor::loadBundle(
+    std::unique_ptr<const JSBigString> script,
+    std::string sourceURL) {
+  SystraceSection s("JSIExecutor::loadBundle");
+
+  // TODO: check for and use precompiled HBC
+
+  bool hasLogger(ReactMarker::logTaggedMarker);
+  std::string scriptName = simpleBasename(sourceURL);
+  if (hasLogger) {
+    ReactMarker::logTaggedMarker(
+        ReactMarker::RUN_JS_BUNDLE_START, scriptName.c_str());
+  }
+  runtime_->evaluateJavaScript(
+      std::make_unique<BigStringBuffer>(std::move(script)), sourceURL);
+  flush();
+  if (hasLogger) {
+    ReactMarker::logTaggedMarker(
+        ReactMarker::RUN_JS_BUNDLE_STOP, scriptName.c_str());
+  }
+}
+
+void JSIExecutor::setBundleRegistry(std::unique_ptr<RAMBundleRegistry> r) {
+  if (!bundleRegistry_) {
+    runtime_->global().setProperty(
+        *runtime_,
+        "nativeRequire",
+        Function::createFromHostFunction(
+            *runtime_,
+            PropNameID::forAscii(*runtime_, "nativeRequire"),
+            2,
+            [this](
+                __unused Runtime &rt,
+                const facebook::jsi::Value &,
+                const facebook::jsi::Value *args,
+                size_t count) { return nativeRequire(args, count); }));
+  }
+  bundleRegistry_ = std::move(r);
+}
+
+void JSIExecutor::registerBundle(
+    uint32_t bundleId,
+    const std::string &bundlePath) {
+  const auto tag = folly::to<std::string>(bundleId);
+  ReactMarker::logTaggedMarker(
+      ReactMarker::REGISTER_JS_SEGMENT_START, tag.c_str());
+  if (bundleRegistry_) {
+    bundleRegistry_->registerBundle(bundleId, bundlePath);
+  } else {
+    auto script = JSBigFileString::fromPath(bundlePath);
+    if (script->size() == 0) {
+      throw std::invalid_argument(
+          "Empty bundle registered with ID " + tag + " from " + bundlePath);
+    }
+    runtime_->evaluateJavaScript(
+        std::make_unique<BigStringBuffer>(std::move(script)),
+        JSExecutor::getSyntheticBundlePath(bundleId, bundlePath));
+  }
+  ReactMarker::logTaggedMarker(
+      ReactMarker::REGISTER_JS_SEGMENT_STOP, tag.c_str());
+}
+
+void JSIExecutor::callFunction(
+    const std::string &moduleId,
+    const std::string &methodId,
+    const folly::dynamic &arguments) {
+  SystraceSection s(
+      "JSIExecutor::callFunction", "moduleId", moduleId, "methodId", methodId);
+  if (!callFunctionReturnFlushedQueue_) {
+    bindBridge();
+  }
+
+  // Construct the error message producer in case this times out.
+  // This is executed on a background thread, so it must capture its parameters
+  // by value.
+  auto errorProducer = [=] {
+    std::stringstream ss;
+    ss << "moduleID: " << moduleId << " methodID: " << methodId
+       << " arguments: " << folly::toJson(arguments);
+    return ss.str();
+  };
+
+  Value ret = Value::undefined();
+  try {
+    scopedTimeoutInvoker_(
+        [&] {
+          ret = callFunctionReturnFlushedQueue_->call(
+              *runtime_,
+              moduleId,
+              methodId,
+              valueFromDynamic(*runtime_, arguments));
+        },
+        std::move(errorProducer));
+  } catch (...) {
+    std::throw_with_nested(
+        std::runtime_error("Error calling " + moduleId + "." + methodId));
+  }
+
+  callNativeModules(ret, true);
+}
+
+void JSIExecutor::invokeCallback(
+    const double callbackId,
+    const folly::dynamic &arguments) {
+  SystraceSection s("JSIExecutor::invokeCallback", "callbackId", callbackId);
+  if (!invokeCallbackAndReturnFlushedQueue_) {
+    bindBridge();
+  }
+  Value ret;
+  try {
+    ret = invokeCallbackAndReturnFlushedQueue_->call(
+        *runtime_, callbackId, valueFromDynamic(*runtime_, arguments));
+  } catch (...) {
+    std::throw_with_nested(std::runtime_error(
+        folly::to<std::string>("Error invoking callback ", callbackId)));
+  }
+
+  callNativeModules(ret, true);
+}
+
+void JSIExecutor::setGlobalVariable(
+    std::string propName,
+    std::unique_ptr<const JSBigString> jsonValue) {
+  SystraceSection s("JSIExecutor::setGlobalVariable", "propName", propName);
+  runtime_->global().setProperty(
+      *runtime_,
+      propName.c_str(),
+      Value::createFromJsonUtf8(
+          *runtime_,
+          reinterpret_cast<const uint8_t *>(jsonValue->c_str()),
+          jsonValue->size()));
+}
+
+std::string JSIExecutor::getDescription() {
+  return "JSI (" + runtime_->description() + ")";
+}
+
+void *JSIExecutor::getJavaScriptContext() {
+  return runtime_.get();
+}
+
+bool JSIExecutor::isInspectable() {
+  return runtime_->isInspectable();
+}
+
+void JSIExecutor::handleMemoryPressure(int pressureLevel) {
+  // The level is an enum value passed by the Android OS to an onTrimMemory
+  // event callback. Defined in ComponentCallbacks2.
+  enum AndroidMemoryPressure {
+    TRIM_MEMORY_BACKGROUND = 40,
+    TRIM_MEMORY_COMPLETE = 80,
+    TRIM_MEMORY_MODERATE = 60,
+    TRIM_MEMORY_RUNNING_CRITICAL = 15,
+    TRIM_MEMORY_RUNNING_LOW = 10,
+    TRIM_MEMORY_RUNNING_MODERATE = 5,
+    TRIM_MEMORY_UI_HIDDEN = 20,
+  };
+  const char *levelName;
+  switch (pressureLevel) {
+    case TRIM_MEMORY_BACKGROUND:
+      levelName = "TRIM_MEMORY_BACKGROUND";
+      break;
+    case TRIM_MEMORY_COMPLETE:
+      levelName = "TRIM_MEMORY_COMPLETE";
+      break;
+    case TRIM_MEMORY_MODERATE:
+      levelName = "TRIM_MEMORY_MODERATE";
+      break;
+    case TRIM_MEMORY_RUNNING_CRITICAL:
+      levelName = "TRIM_MEMORY_RUNNING_CRITICAL";
+      break;
+    case TRIM_MEMORY_RUNNING_LOW:
+      levelName = "TRIM_MEMORY_RUNNING_LOW";
+      break;
+    case TRIM_MEMORY_RUNNING_MODERATE:
+      levelName = "TRIM_MEMORY_RUNNING_MODERATE";
+      break;
+    case TRIM_MEMORY_UI_HIDDEN:
+      levelName = "TRIM_MEMORY_UI_HIDDEN";
+      break;
+    default:
+      levelName = "UNKNOWN";
+      break;
+  }
+
+  switch (pressureLevel) {
+    case TRIM_MEMORY_RUNNING_LOW:
+    case TRIM_MEMORY_RUNNING_MODERATE:
+    case TRIM_MEMORY_UI_HIDDEN:
+      // For non-severe memory trims, do nothing.
+      LOG(INFO) << "Memory warning (pressure level: " << levelName
+                << ") received by JS VM, ignoring because it's non-severe";
+      break;
+    case TRIM_MEMORY_BACKGROUND:
+    case TRIM_MEMORY_COMPLETE:
+    case TRIM_MEMORY_MODERATE:
+    case TRIM_MEMORY_RUNNING_CRITICAL:
+      // For now, pressureLevel is unused by collectGarbage.
+      // This may change in the future if the JS GC has different styles of
+      // collections.
+      LOG(INFO) << "Memory warning (pressure level: " << levelName
+                << ") received by JS VM, running a GC";
+      runtime_->instrumentation().collectGarbage();
+      break;
+    default:
+      // Use the raw number instead of the name here since the name is
+      // meaningless.
+      LOG(WARNING) << "Memory warning (pressure level: " << pressureLevel
+                   << ") received by JS VM, unrecognized pressure level";
+      break;
+  }
+}
+
+void JSIExecutor::bindBridge() {
+  std::call_once(bindFlag_, [this] {
+    SystraceSection s("JSIExecutor::bindBridge (once)");
+    Value batchedBridgeValue =
+        runtime_->global().getProperty(*runtime_, "__fbBatchedBridge");
+    if (batchedBridgeValue.isUndefined()) {
+      throw JSINativeException(
+          "Could not get BatchedBridge, make sure your bundle is packaged correctly");
+    }
+
+    Object batchedBridge = batchedBridgeValue.asObject(*runtime_);
+    callFunctionReturnFlushedQueue_ = batchedBridge.getPropertyAsFunction(
+        *runtime_, "callFunctionReturnFlushedQueue");
+    invokeCallbackAndReturnFlushedQueue_ = batchedBridge.getPropertyAsFunction(
+        *runtime_, "invokeCallbackAndReturnFlushedQueue");
+    flushedQueue_ =
+        batchedBridge.getPropertyAsFunction(*runtime_, "flushedQueue");
+  });
+}
+
+void JSIExecutor::callNativeModules(const Value &queue, bool isEndOfBatch) {
+  SystraceSection s("JSIExecutor::callNativeModules");
+  // If this fails, you need to pass a fully functional delegate with a
+  // module registry to the factory/ctor.
+  CHECK(delegate_) << "Attempting to use native modules without a delegate";
+#if 0 // maybe useful for debugging
+  std::string json = runtime_->global().getPropertyAsObject(*runtime_, "JSON")
+    .getPropertyAsFunction(*runtime_, "stringify").call(*runtime_, queue)
+    .getString(*runtime_).utf8(*runtime_);
+#endif
+  delegate_->callNativeModules(
+      *this, dynamicFromValue(*runtime_, queue), isEndOfBatch);
+}
+
+void JSIExecutor::flush() {
+  SystraceSection s("JSIExecutor::flush");
+  if (flushedQueue_) {
+    callNativeModules(flushedQueue_->call(*runtime_), true);
+    return;
+  }
+
+  // When a native module is called from JS, BatchedBridge.enqueueNativeCall()
+  // is invoked.  For that to work, require('BatchedBridge') has to be called,
+  // and when that happens, __fbBatchedBridge is set as a side effect.
+  Value batchedBridge =
+      runtime_->global().getProperty(*runtime_, "__fbBatchedBridge");
+  // So here, if __fbBatchedBridge doesn't exist, then we know no native calls
+  // have happened, and we were able to determine this without forcing
+  // BatchedBridge to be loaded as a side effect.
+  if (!batchedBridge.isUndefined()) {
+    // If calls were made, we bind to the JS bridge methods, and use them to
+    // get the pending queue of native calls.
+    bindBridge();
+    callNativeModules(flushedQueue_->call(*runtime_), true);
+  } else if (delegate_) {
+    // If we have a delegate, we need to call it; we pass a null list to
+    // callNativeModules, since we know there are no native calls, without
+    // calling into JS again.  If no calls were made and there's no delegate,
+    // nothing happens, which is correct.
+    callNativeModules(nullptr, true);
+  }
+}
+
+Value JSIExecutor::nativeRequire(const Value *args, size_t count) {
+  if (count > 2 || count == 0) {
+    throw std::invalid_argument("Got wrong number of args");
+  }
+
+  uint32_t moduleId = folly::to<uint32_t>(args[0].getNumber());
+  uint32_t bundleId = count == 2 ? folly::to<uint32_t>(args[1].getNumber()) : 0;
+  auto module = bundleRegistry_->getModule(bundleId, moduleId);
+
+  runtime_->evaluateJavaScript(
+      std::make_unique<StringBuffer>(module.code), module.name);
+  return facebook::jsi::Value();
+}
+
+Value JSIExecutor::nativeCallSyncHook(const Value *args, size_t count) {
+  if (count != 3) {
+    throw std::invalid_argument("nativeCallSyncHook arg count must be 3");
+  }
+
+  if (!args[2].asObject(*runtime_).isArray(*runtime_)) {
+    throw std::invalid_argument(
+        folly::to<std::string>("method parameters should be array"));
+  }
+
+  MethodCallResult result = delegate_->callSerializableNativeHook(
+      *this,
+      static_cast<unsigned int>(args[0].getNumber()), // moduleId
+      static_cast<unsigned int>(args[1].getNumber()), // methodId
+      dynamicFromValue(*runtime_, args[2])); // args
+
+  if (!result.hasValue()) {
+    return Value::undefined();
+  }
+  return valueFromDynamic(*runtime_, result.value());
+}
+
+#if DEBUG
+Value JSIExecutor::globalEvalWithSourceUrl(const Value *args, size_t count) {
+  if (count != 1 && count != 2) {
+    throw std::invalid_argument(
+        "globalEvalWithSourceUrl arg count must be 1 or 2");
+  }
+
+  auto code = args[0].asString(*runtime_).utf8(*runtime_);
+  std::string url;
+  if (count > 1 && args[1].isString()) {
+    url = args[1].asString(*runtime_).utf8(*runtime_);
+  }
+
+  return runtime_->evaluateJavaScript(
+      std::make_unique<StringBuffer>(std::move(code)), url);
+}
+#endif
+
+void bindNativeLogger(Runtime &runtime, Logger logger) {
+  runtime.global().setProperty(
+      runtime,
+      "nativeLoggingHook",
+      Function::createFromHostFunction(
+          runtime,
+          PropNameID::forAscii(runtime, "nativeLoggingHook"),
+          2,
+          [logger = std::move(logger)](
+              jsi::Runtime &runtime,
+              const jsi::Value &,
+              const jsi::Value *args,
+              size_t count) {
+            if (count != 2) {
+              throw std::invalid_argument(
+                  "nativeLoggingHook takes 2 arguments");
+            }
+            logger(
+                args[0].asString(runtime).utf8(runtime),
+                folly::to<unsigned int>(args[1].asNumber()));
+            return Value::undefined();
+          }));
+}
+
+void bindNativePerformanceNow(Runtime &runtime, PerformanceNow performanceNow) {
+  runtime.global().setProperty(
+      runtime,
+      "nativePerformanceNow",
+      Function::createFromHostFunction(
+          runtime,
+          PropNameID::forAscii(runtime, "nativePerformanceNow"),
+          0,
+          [performanceNow = std::move(performanceNow)](
+              jsi::Runtime &runtime,
+              const jsi::Value &,
+              const jsi::Value *args,
+              size_t count) { return Value(performanceNow()); }));
+}
+
+} // namespace react
+} // namespace facebook

node_modules/react-native/ReactCommon/jsiexecutor/jsireact/JSIExecutor.h

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include "JSINativeModules.h"
+
+#include <cxxreact/JSBigString.h>
+#include <cxxreact/JSExecutor.h>
+#include <cxxreact/RAMBundleRegistry.h>
+#include <jsi/jsi.h>
+#include <functional>
+#include <mutex>
+
+namespace facebook {
+namespace react {
+
+// A JSIScopedTimeoutInvoker is a trampoline-type function for introducing
+// timeouts. Call the TimeoutInvoker with a function to execute, the invokee.
+// The TimeoutInvoker will immediately invoke it, synchronously on the same
+// thread. If the invokee fails to return after some timeout (private to the
+// TimeoutInvoker), a soft error may be reported.
+//
+// If a soft error is reported, the second parameter errorMessageProducer will
+// be invoked to produce an error message, which will be included in the soft
+// error report. Note that the errorMessageProducer will be invoked
+// asynchronously on a different thread.
+//
+// The timeout behavior does NOT cause the invokee to aborted. If the invokee
+// blocks forever, so will the ScopedTimeoutInvoker (but the soft error may
+// still be reported).
+//
+// The invokee is passed by const ref because it is executed synchronously, but
+// the errorMessageProducer is passed by value because it must be copied or
+// moved for async execution.
+//
+// Example usage:
+//
+//   int param = ...;
+//   timeoutInvoker(
+//       [&]{ someBigWork(param); },
+//       [=] -> std::string {
+//           return "someBigWork, param " + std::to_string(param);
+//       })
+//
+using JSIScopedTimeoutInvoker = std::function<void(
+    const std::function<void()> &invokee,
+    std::function<std::string()> errorMessageProducer)>;
+
+class BigStringBuffer : public jsi::Buffer {
+ public:
+  BigStringBuffer(std::unique_ptr<const JSBigString> script)
+      : script_(std::move(script)) {}
+
+  size_t size() const override {
+    return script_->size();
+  }
+
+  const uint8_t *data() const override {
+    return reinterpret_cast<const uint8_t *>(script_->c_str());
+  }
+
+ private:
+  std::unique_ptr<const JSBigString> script_;
+};
+
+class JSIExecutor : public JSExecutor {
+ public:
+  using RuntimeInstaller = std::function<void(jsi::Runtime &runtime)>;
+
+  JSIExecutor(
+      std::shared_ptr<jsi::Runtime> runtime,
+      std::shared_ptr<ExecutorDelegate> delegate,
+      const JSIScopedTimeoutInvoker &timeoutInvoker,
+      RuntimeInstaller runtimeInstaller);
+  void initializeRuntime() override;
+  void loadBundle(
+      std::unique_ptr<const JSBigString> script,
+      std::string sourceURL) override;
+  void setBundleRegistry(std::unique_ptr<RAMBundleRegistry>) override;
+  void registerBundle(uint32_t bundleId, const std::string &bundlePath)
+      override;
+  void callFunction(
+      const std::string &moduleId,
+      const std::string &methodId,
+      const folly::dynamic &arguments) override;
+  void invokeCallback(const double callbackId, const folly::dynamic &arguments)
+      override;
+  void setGlobalVariable(
+      std::string propName,
+      std::unique_ptr<const JSBigString> jsonValue) override;
+  std::string getDescription() override;
+  void *getJavaScriptContext() override;
+  bool isInspectable() override;
+  void handleMemoryPressure(int pressureLevel) override;
+
+  // An implementation of JSIScopedTimeoutInvoker that simply runs the
+  // invokee, with no timeout.
+  static void defaultTimeoutInvoker(
+      const std::function<void()> &invokee,
+      std::function<std::string()> errorMessageProducer) {
+    (void)errorMessageProducer;
+    invokee();
+  }
+
+  void flush() override;
+
+ private:
+  class NativeModuleProxy;
+
+  void bindBridge();
+  void callNativeModules(const jsi::Value &queue, bool isEndOfBatch);
+  jsi::Value nativeCallSyncHook(const jsi::Value *args, size_t count);
+  jsi::Value nativeRequire(const jsi::Value *args, size_t count);
+#ifdef DEBUG
+  jsi::Value globalEvalWithSourceUrl(const jsi::Value *args, size_t count);
+#endif
+
+  std::shared_ptr<jsi::Runtime> runtime_;
+  std::shared_ptr<ExecutorDelegate> delegate_;
+  std::shared_ptr<JSINativeModules> nativeModules_;
+  std::once_flag bindFlag_;
+  std::unique_ptr<RAMBundleRegistry> bundleRegistry_;
+  JSIScopedTimeoutInvoker scopedTimeoutInvoker_;
+  RuntimeInstaller runtimeInstaller_;
+
+  folly::Optional<jsi::Function> callFunctionReturnFlushedQueue_;
+  folly::Optional<jsi::Function> invokeCallbackAndReturnFlushedQueue_;
+  folly::Optional<jsi::Function> flushedQueue_;
+};
+
+using Logger =
+    std::function<void(const std::string &message, unsigned int logLevel)>;
+void bindNativeLogger(jsi::Runtime &runtime, Logger logger);
+
+using PerformanceNow = std::function<double()>;
+void bindNativePerformanceNow(
+    jsi::Runtime &runtime,
+    PerformanceNow performanceNow);
+} // namespace react
+} // namespace facebook

node_modules/react-native/ReactCommon/jsiexecutor/jsireact/JSINativeModules.cpp

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "jsireact/JSINativeModules.h"
+
+#include <glog/logging.h>
+
+#include <cxxreact/ReactMarker.h>
+
+#include <jsi/JSIDynamic.h>
+
+#include <string>
+
+using namespace facebook::jsi;
+
+namespace facebook {
+namespace react {
+
+JSINativeModules::JSINativeModules(
+    std::shared_ptr<ModuleRegistry> moduleRegistry)
+    : m_moduleRegistry(std::move(moduleRegistry)) {}
+
+Value JSINativeModules::getModule(Runtime &rt, const PropNameID &name) {
+  if (!m_moduleRegistry) {
+    return nullptr;
+  }
+
+  std::string moduleName = name.utf8(rt);
+
+  const auto it = m_objects.find(moduleName);
+  if (it != m_objects.end()) {
+    return Value(rt, it->second);
+  }
+
+  auto module = createModule(rt, moduleName);
+  if (!module.hasValue()) {
+    // Allow lookup to continue in the objects own properties, which allows for
+    // overrides of NativeModules
+    return nullptr;
+  }
+
+  auto result =
+      m_objects.emplace(std::move(moduleName), std::move(*module)).first;
+  return Value(rt, result->second);
+}
+
+void JSINativeModules::reset() {
+  m_genNativeModuleJS = folly::none;
+  m_objects.clear();
+}
+
+folly::Optional<Object> JSINativeModules::createModule(
+    Runtime &rt,
+    const std::string &name) {
+  bool hasLogger(ReactMarker::logTaggedMarker);
+  if (hasLogger) {
+    ReactMarker::logTaggedMarker(
+        ReactMarker::NATIVE_MODULE_SETUP_START, name.c_str());
+  }
+
+  if (!m_genNativeModuleJS) {
+    m_genNativeModuleJS =
+        rt.global().getPropertyAsFunction(rt, "__fbGenNativeModule");
+  }
+
+  auto result = m_moduleRegistry->getConfig(name);
+  if (!result.hasValue()) {
+    return folly::none;
+  }
+
+  Value moduleInfo = m_genNativeModuleJS->call(
+      rt,
+      valueFromDynamic(rt, result->config),
+      static_cast<double>(result->index));
+  CHECK(!moduleInfo.isNull()) << "Module returned from genNativeModule is null";
+
+  folly::Optional<Object> module(
+      moduleInfo.asObject(rt).getPropertyAsObject(rt, "module"));
+
+  if (hasLogger) {
+    ReactMarker::logTaggedMarker(
+        ReactMarker::NATIVE_MODULE_SETUP_STOP, name.c_str());
+  }
+
+  return module;
+}
+
+} // namespace react
+} // namespace facebook

node_modules/react-native/ReactCommon/jsiexecutor/jsireact/JSINativeModules.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include <cxxreact/ModuleRegistry.h>
+#include <folly/Optional.h>
+#include <jsi/jsi.h>
+
+namespace facebook {
+namespace react {
+
+/**
+ * Holds and creates JS representations of the modules in ModuleRegistry
+ */
+class JSINativeModules {
+ public:
+  explicit JSINativeModules(std::shared_ptr<ModuleRegistry> moduleRegistry);
+  jsi::Value getModule(jsi::Runtime &rt, const jsi::PropNameID &name);
+  void reset();
+
+ private:
+  folly::Optional<jsi::Function> m_genNativeModuleJS;
+  std::shared_ptr<ModuleRegistry> m_moduleRegistry;
+  std::unordered_map<std::string, jsi::Object> m_objects;
+
+  folly::Optional<jsi::Object> createModule(
+      jsi::Runtime &rt,
+      const std::string &name);
+};
+
+} // namespace react
+} // namespace facebook