mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Ramanpreet Nara
9ae95582e7
Summary: ## Description You're not supposed to hold on to JSI objects (ex: `jsi::Function`) past the point where their `jsi::Runtime` is deleted. Otherwise, we get a dangling pointer crash, like this: T60262810! Historically, this cleanup problem has always been really tricky to get right. With this diff, I hope to fix that problem once and for all by deleting all `jsi::Function`s when we delete the global `__turboModuleProxy` function. ## Current Setup - The TurboModules infra uses weak references to `CallbackWrapper`s to hold on to the `jsi::Function`s passed from JS to ObjC. - The LongLivedObjectCollection holds on to strong references to `CallbackWrapper`s. This ensures that the `jsi::Function`s aren't deleted prematurely. This also means that we can use `LongLivedObjectCollection` to delete all `CallbackWrappers`. - `TurboModuleBinding` is the abstraction we use to install the global `__turboModuleProxy` function. It is owned by `TurboModuleManager`, and `TurboModuleManager` uses it to clear all references to `jsi::Function`s, when we delete all NativeModules. ## Solution 1. Transfer ownership of `TurboModuleBinding` from `TurboModuleManager` to the `__turboModuleProxy` function. 2. Clear the `LongLivedObjectCollection` when `TurboModuleBinding` is deleted. Changelog: [iOS][Fixed] - Clear all held jsi::Functions when jsi::Runtime is deleted Reviewed By: JoshuaGross Differential Revision: D19565499 fbshipit-source-id: e3510ea04e72f6bda363a8fc3ee2be60303b70a6
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <string>
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#include <ReactCommon/TurboModule.h>
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#include <jsi/jsi.h>
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namespace facebook {
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namespace react {
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class JSCallInvoker;
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/**
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* Represents the JavaScript binding for the TurboModule system.
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*/
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class TurboModuleBinding {
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public:
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/*
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* Installs TurboModuleBinding into JavaScript runtime.
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* Thread synchronization must be enforced externally.
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*/
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static void install(
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jsi::Runtime &runtime,
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const TurboModuleProviderFunctionType &&moduleProvider);
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TurboModuleBinding(const TurboModuleProviderFunctionType &&moduleProvider);
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virtual ~TurboModuleBinding();
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/**
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* Get an TurboModule instance for the given module name.
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*/
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std::shared_ptr<TurboModule> getModule(const std::string &name);
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private:
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/**
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* A lookup function exposed to JS to get an instance of a TurboModule
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* for the given name.
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*/
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jsi::Value jsProxy(
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jsi::Runtime &runtime,
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const jsi::Value &thisVal,
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const jsi::Value *args,
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size_t count);
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TurboModuleProviderFunctionType moduleProvider_;
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};
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} // namespace react
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} // namespace facebook
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