Unable to generate v8 snapshots for Arm64 on Ubuntu

[craftzdog]

I'm trying to generate v8 snapshots for linux arm64 on ubuntu x64.

Steps to reproduce

On x64 Ubuntu machine:

DEBUG='*' npm_config_arch=arm64 npm install --save-dev electron-mksnapshot
./node_modules/.bin/mksnapshot /home/runner/work/tmp/snapshot.js --output_dir /home/runner/work/tmp/

It downloads the base snapshot files via https://github.com/electron/electron/releases/download/v19.0.4/mksnapshot-v19.0.4-linux-arm64-x64.zip as expected.

Expected result

The snapshot_blob.bin and v8_context_snapshot.bin files are generated.

Actual result

Got an error as following:

Loading script for embedding: /home/runner/work/tmp/snapshot.js
Unable to open file "gen/v8/embedded.S" for writing.
Error running mksnapshot.

The content of snapshot.js doesn't matter.
It still fails even if you specified an empty js file.
Confirmed that "gen/v8/embedded.S" exists in "./node_modules/electron-mksnapshot/bin/gen/v8/".

It works fine to generate snapshots for x64 arch.

[craftzdog]

Looks like the error happens at https://chromium.googlesource.com/v8/v8/+/refs/heads/roll/src/snapshot/mksnapshot.cc#106

[EthianWong]

How to resolve this problem? i got the same issue~ Orz...