Enable `contextIsolation` for all windows

[bpasero]

We should explore to enable contextIsolation for all windows and ensure:

• there are no critical performance regressions doing so
  • we could explore to implement message port based communication from renderer to main process to bypass the context bridge hop
• there are no issues from the contextBridge when using the exposed API from our preload script

[bpasero]

Looks like there is a native crash when running from my macOS ARM device out of sources (branch: https://github.com/microsoft/vscode/tree/ben/contextIsolation):

03644fe8-2020-4c3f-8ec7-fc8f10755d5d.dmp.zip

[deepak1556]

Its a crash when trying to proxy process.env

vscode/src/vs/base/parts/sandbox/electron-browser/preload.js

Line 284 in 9006cc8

get env() { return process.env; },

. Specifically, node environment object has a custom property interceptor which gets called when accessing enumerable properties https://github.com/nodejs/node/blob/394fdecc9141aa4c6a8ea7f1aecaf5fcaaaf5c72/src/node_env_var.cc#L368-L376, for whatever reason the v8 context passed to this interceptor is of the main world instead of the isolated world hence leading to EXC_BAD_ACCESS crash.

Temporary workaround until further investigation is to avoid hitting the custom interceptor by
get env() { return { ...process.env }; },

[bpasero]

Thanks, pushed a fix for that.

We still cannot launch with contextIsolation: true, there are things we depend on that will not work. I wonder if sandbox: true has to happen first because some of these things seem node.js dependent.

enableASARSupport() is only available in node.js environments
Uncaught (in promise) TypeError: require.__$__nodeRequire is not a function
Uncaught TypeError: Cannot read property '__$__isRecorded' of undefined