WebAssembly System Interface Implementation for Web Browsers

This module provides an implementation of the WebAssembly System Interface for Web Browsers

Supported Syscalls

wasi_snapshot_preview1

• args_get
• args_sizes_get
• environ_get
• environ_sizes_get
• clock_res_get
• clock_time_get
• fd_advise
• fd_allocate
• fd_close
• fd_datasync
• fd_fdstat_get
• fd_fdstat_set_flags
• fd_fdstat_set_rights
• fd_filestat_get
• fd_filestat_set_size
• fd_filestat_set_times
• fd_pread
• fd_prestat_get
• fd_prestat_dir_name
• fd_pwrite
• fd_read
• fd_readdir
• fd_renumber
• fd_seek
• fd_sync
• fd_tell
• fd_write
• path_create_directory
• path_filestat_get
• path_filestat_set_times
• path_link
• path_open
• path_readlink
• path_remove_directory
• path_rename
• path_symlink
• path_unlink_file
• poll_oneoff
• proc_exit
• proc_raise
• sched_yield
• random_get
• sock_recv
• sock_send
• sock_shutdown

Usage

import Context from "./wasi_snapshot_preview1.js";

const context = new Context({
});

const instance = await WebAssembly.instantiateStreaming(fetch("module.wasm"), {
  wasi_snapshot_preview1: context.exports,
});

context.memory = instance.exports.memory;

if (module.exports._start) {
  instance.exports._start();
} else if (module.exports._initialize) {
  instance.exports._initialize();
} else {
  throw new Error("No entry point found");
}