Running simple "hello world" JS script on NodeJS (tracking "epic")

[castarco]

I've run the following command in my Linux machine (to see which syscalls are being sent to the kernel for a very basic NodeJS program):

strace echo "console.log('hello')" | node

and I've got the following list (taking aside the ones already implemented):

• access
• openat
• pread64
• mprotect

some of this calls could be related to Bash and not NodeJS, but if instead I run this:

strace node example.js # with the same JS script as before

we obtain this list (confirming that they are needed for NodeJS too):

• [ ] access
• [ ] openat
• [ ] pread64
• [ ] mprotect
• [ ] munmap
• [ ] set_robutst_list
• [ ] rt_sigprocmask
• [ ] prlimit64
• [ ] pipe2
• [ ] eventfd2
• [ ] clone
• [ ] madvise
• [ ] futex: https://github.com/nuta/kerla/issues/2
• [ ] epoll_ctl: https://github.com/nuta/kerla/issues/19
• [ ] epoll_wait: https://github.com/nuta/kerla/issues/19
• [ ] exit_group

I hope this can be useful to guide the next steps for this roadmap ( https://github.com/nuta/kerla/projects/1 ).

[nuta]

Thanks for sharing! This is what I needed to do next!

It seems we need to allow mapping executable pages (perhaps for JIT?) and implement epoll.

On Thu, Oct 28, 2021 at 22:36 Andrés Correa Casablanca < @.***> wrote:

I've run the following command in my Linux machine (to see which syscalls are being sent to the kernel for a very basic NodeJS program):

strace echo "console.log('hello')" | node

and I've got the following list (taking aside the ones already implemented):

• access
• openat
• mmap
• pread64
• mprotect

some of this calls could be related to Bash and not NodeJS, but if instead I run this:

strace node example.js # with the same JS script as before

we obtain this list (confirming that they are needed for NodeJS too):

• access
• openat
• mmap
• pread64
• mprotect
• munmap
• set_tid_address
• set_robutst_list
• rt_sigaction
• rt_sigprocmask
• prlimit64
• pipe2
• eventfd2
• clone
• madvise
• epoll_ctl
• exit_group

I hope this can be useful to guide the next steps for this roadmap ( https://github.com/nuta/kerla/projects/1 ).

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-- Seiya