nodejs architecture

[preveen-stack]

In the Node.js runtime, the main function that is written in C and serves as the entry point for the Node.js process is located in the node/src/node_main.cc file.

This node_main.cc file initializes the Node.js runtime, sets up various modules and APIs, and finally starts the event loop that drives the entire Node.js runtime. The main function is defined near the bottom of the file and is responsible for parsing command-line arguments, initializing the V8 JavaScript engine, and then starting the event loop by invoking the uv_run() function.

It's worth noting that the node_main.cc file is part of the Node.js source code, and it's not something that you would typically need to modify or interact with when writing Node.js applications.

[preveen-stack]

The node::Start() function is defined in the node/src/node.cc file in the Node.js source code. This function is responsible for initializing and starting the Node.js runtime, including setting up the V8 JavaScript engine, loading built-in modules, and starting the event loop.

The node::Start() function is called from the main() function in the node/src/node_main.cc file, which serves as the entry point for the Node.js process. The main() function performs some basic initialization tasks, such as parsing command-line arguments, before calling node::Start() to start the Node.js runtime.

It's worth noting that the node::Start() function is not intended to be called directly from user code, as it's part of the internal implementation of the Node.js runtime. Instead, you should use the Node.js APIs and modules to interact with the runtime and build your applications.

[preveen-stack]

The StartInternal() function is defined in the node/src/node.cc file in the Node.js source code. This function is called by the node::Start() function, which in turn is called from the node::Start() function in the node/src/node_main.cc file.

The StartInternal() function performs some of the initial setup tasks required to start the Node.js runtime, such as initializing the V8 engine, loading built-in modules, and setting up the process environment.

As of Node.js version 16.0.0, the StartInternal() function is defined on line 3973 of the node/src/node.cc file. However, as I mentioned earlier, the exact line number may vary depending on the version of Node.js you are using.