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#![deny(unused_mut)]
#![doc(html_favicon_url = "https://wasmer.io/images/icons/favicon-32x32.png")]
#![doc(html_logo_url = "https://github.com/wasmerio.png?size=200")]
#[macro_use]
mod macros;
mod ptr;
mod state;
mod syscalls;
mod utils;
use crate::syscalls::*;
pub use crate::state::{
Fd, Pipe, Stderr, Stdin, Stdout, WasiFile, WasiFs, WasiFsError, WasiState, WasiStateBuilder,
WasiStateCreationError, ALL_RIGHTS, VIRTUAL_ROOT_FD,
};
pub use crate::syscalls::types;
pub use crate::utils::{get_wasi_version, get_wasi_versions, is_wasi_module, WasiVersion};
use thiserror::Error;
use wasmer::{
imports, ChainableNamedResolver, Function, ImportObject, LazyInit, Memory, Module,
NamedResolver, Store, WasmerEnv,
};
use std::sync::{Arc, Mutex, MutexGuard};
#[derive(Error, Debug)]
pub enum WasiError {
#[error("WASI exited with code: {0}")]
Exit(syscalls::types::__wasi_exitcode_t),
#[error("The WASI version could not be determined")]
UnknownWasiVersion,
}
#[derive(Debug, Clone, WasmerEnv)]
pub struct WasiEnv {
pub state: Arc<Mutex<WasiState>>,
#[wasmer(export)]
memory: LazyInit<Memory>,
}
impl WasiEnv {
pub fn new(state: WasiState) -> Self {
Self {
state: Arc::new(Mutex::new(state)),
memory: LazyInit::new(),
}
}
pub fn import_object(&mut self, module: &Module) -> Result<ImportObject, WasiError> {
let wasi_version = get_wasi_version(module, false).ok_or(WasiError::UnknownWasiVersion)?;
Ok(generate_import_object_from_env(
module.store(),
self.clone(),
wasi_version,
))
}
pub fn import_object_for_all_wasi_versions(
&mut self,
module: &Module,
) -> Result<Box<dyn NamedResolver>, WasiError> {
let wasi_versions =
get_wasi_versions(module, false).ok_or(WasiError::UnknownWasiVersion)?;
let mut resolver: Box<dyn NamedResolver> = { Box::new(()) };
for version in wasi_versions.iter() {
let new_import_object =
generate_import_object_from_env(module.store(), self.clone(), *version);
resolver = Box::new(new_import_object.chain_front(resolver));
}
Ok(resolver)
}
pub fn state(&self) -> MutexGuard<WasiState> {
self.state.lock().unwrap()
}
pub fn memory(&self) -> &Memory {
self.memory_ref()
.expect("Memory should be set on `WasiEnv` first")
}
pub(crate) fn get_memory_and_wasi_state(
&self,
_mem_index: u32,
) -> (&Memory, MutexGuard<WasiState>) {
let memory = self.memory();
let state = self.state.lock().unwrap();
(memory, state)
}
}
pub fn generate_import_object_from_env(
store: &Store,
wasi_env: WasiEnv,
version: WasiVersion,
) -> ImportObject {
match version {
WasiVersion::Snapshot0 => generate_import_object_snapshot0(store, wasi_env),
WasiVersion::Snapshot1 | WasiVersion::Latest => {
generate_import_object_snapshot1(store, wasi_env)
}
}
}
fn generate_import_object_snapshot0(store: &Store, env: WasiEnv) -> ImportObject {
imports! {
"wasi_unstable" => {
"args_get" => Function::new_native_with_env(store, env.clone(), args_get),
"args_sizes_get" => Function::new_native_with_env(store, env.clone(), args_sizes_get),
"clock_res_get" => Function::new_native_with_env(store, env.clone(), clock_res_get),
"clock_time_get" => Function::new_native_with_env(store, env.clone(), clock_time_get),
"environ_get" => Function::new_native_with_env(store, env.clone(), environ_get),
"environ_sizes_get" => Function::new_native_with_env(store, env.clone(), environ_sizes_get),
"fd_advise" => Function::new_native_with_env(store, env.clone(), fd_advise),
"fd_allocate" => Function::new_native_with_env(store, env.clone(), fd_allocate),
"fd_close" => Function::new_native_with_env(store, env.clone(), fd_close),
"fd_datasync" => Function::new_native_with_env(store, env.clone(), fd_datasync),
"fd_fdstat_get" => Function::new_native_with_env(store, env.clone(), fd_fdstat_get),
"fd_fdstat_set_flags" => Function::new_native_with_env(store, env.clone(), fd_fdstat_set_flags),
"fd_fdstat_set_rights" => Function::new_native_with_env(store, env.clone(), fd_fdstat_set_rights),
"fd_filestat_get" => Function::new_native_with_env(store, env.clone(), legacy::snapshot0::fd_filestat_get),
"fd_filestat_set_size" => Function::new_native_with_env(store, env.clone(), fd_filestat_set_size),
"fd_filestat_set_times" => Function::new_native_with_env(store, env.clone(), fd_filestat_set_times),
"fd_pread" => Function::new_native_with_env(store, env.clone(), fd_pread),
"fd_prestat_get" => Function::new_native_with_env(store, env.clone(), fd_prestat_get),
"fd_prestat_dir_name" => Function::new_native_with_env(store, env.clone(), fd_prestat_dir_name),
"fd_pwrite" => Function::new_native_with_env(store, env.clone(), fd_pwrite),
"fd_read" => Function::new_native_with_env(store, env.clone(), fd_read),
"fd_readdir" => Function::new_native_with_env(store, env.clone(), fd_readdir),
"fd_renumber" => Function::new_native_with_env(store, env.clone(), fd_renumber),
"fd_seek" => Function::new_native_with_env(store, env.clone(), legacy::snapshot0::fd_seek),
"fd_sync" => Function::new_native_with_env(store, env.clone(), fd_sync),
"fd_tell" => Function::new_native_with_env(store, env.clone(), fd_tell),
"fd_write" => Function::new_native_with_env(store, env.clone(), fd_write),
"path_create_directory" => Function::new_native_with_env(store, env.clone(), path_create_directory),
"path_filestat_get" => Function::new_native_with_env(store, env.clone(), legacy::snapshot0::path_filestat_get),
"path_filestat_set_times" => Function::new_native_with_env(store, env.clone(), path_filestat_set_times),
"path_link" => Function::new_native_with_env(store, env.clone(), path_link),
"path_open" => Function::new_native_with_env(store, env.clone(), path_open),
"path_readlink" => Function::new_native_with_env(store, env.clone(), path_readlink),
"path_remove_directory" => Function::new_native_with_env(store, env.clone(), path_remove_directory),
"path_rename" => Function::new_native_with_env(store, env.clone(), path_rename),
"path_symlink" => Function::new_native_with_env(store, env.clone(), path_symlink),
"path_unlink_file" => Function::new_native_with_env(store, env.clone(), path_unlink_file),
"poll_oneoff" => Function::new_native_with_env(store, env.clone(), legacy::snapshot0::poll_oneoff),
"proc_exit" => Function::new_native_with_env(store, env.clone(), proc_exit),
"proc_raise" => Function::new_native_with_env(store, env.clone(), proc_raise),
"random_get" => Function::new_native_with_env(store, env.clone(), random_get),
"sched_yield" => Function::new_native_with_env(store, env.clone(), sched_yield),
"sock_recv" => Function::new_native_with_env(store, env.clone(), sock_recv),
"sock_send" => Function::new_native_with_env(store, env.clone(), sock_send),
"sock_shutdown" => Function::new_native_with_env(store, env.clone(), sock_shutdown),
},
}
}
fn generate_import_object_snapshot1(store: &Store, env: WasiEnv) -> ImportObject {
imports! {
"wasi_snapshot_preview1" => {
"args_get" => Function::new_native_with_env(store, env.clone(), args_get),
"args_sizes_get" => Function::new_native_with_env(store, env.clone(), args_sizes_get),
"clock_res_get" => Function::new_native_with_env(store, env.clone(), clock_res_get),
"clock_time_get" => Function::new_native_with_env(store, env.clone(), clock_time_get),
"environ_get" => Function::new_native_with_env(store, env.clone(), environ_get),
"environ_sizes_get" => Function::new_native_with_env(store, env.clone(), environ_sizes_get),
"fd_advise" => Function::new_native_with_env(store, env.clone(), fd_advise),
"fd_allocate" => Function::new_native_with_env(store, env.clone(), fd_allocate),
"fd_close" => Function::new_native_with_env(store, env.clone(), fd_close),
"fd_datasync" => Function::new_native_with_env(store, env.clone(), fd_datasync),
"fd_fdstat_get" => Function::new_native_with_env(store, env.clone(), fd_fdstat_get),
"fd_fdstat_set_flags" => Function::new_native_with_env(store, env.clone(), fd_fdstat_set_flags),
"fd_fdstat_set_rights" => Function::new_native_with_env(store, env.clone(), fd_fdstat_set_rights),
"fd_filestat_get" => Function::new_native_with_env(store, env.clone(), fd_filestat_get),
"fd_filestat_set_size" => Function::new_native_with_env(store, env.clone(), fd_filestat_set_size),
"fd_filestat_set_times" => Function::new_native_with_env(store, env.clone(), fd_filestat_set_times),
"fd_pread" => Function::new_native_with_env(store, env.clone(), fd_pread),
"fd_prestat_get" => Function::new_native_with_env(store, env.clone(), fd_prestat_get),
"fd_prestat_dir_name" => Function::new_native_with_env(store, env.clone(), fd_prestat_dir_name),
"fd_pwrite" => Function::new_native_with_env(store, env.clone(), fd_pwrite),
"fd_read" => Function::new_native_with_env(store, env.clone(), fd_read),
"fd_readdir" => Function::new_native_with_env(store, env.clone(), fd_readdir),
"fd_renumber" => Function::new_native_with_env(store, env.clone(), fd_renumber),
"fd_seek" => Function::new_native_with_env(store, env.clone(), fd_seek),
"fd_sync" => Function::new_native_with_env(store, env.clone(), fd_sync),
"fd_tell" => Function::new_native_with_env(store, env.clone(), fd_tell),
"fd_write" => Function::new_native_with_env(store, env.clone(), fd_write),
"path_create_directory" => Function::new_native_with_env(store, env.clone(), path_create_directory),
"path_filestat_get" => Function::new_native_with_env(store, env.clone(), path_filestat_get),
"path_filestat_set_times" => Function::new_native_with_env(store, env.clone(), path_filestat_set_times),
"path_link" => Function::new_native_with_env(store, env.clone(), path_link),
"path_open" => Function::new_native_with_env(store, env.clone(), path_open),
"path_readlink" => Function::new_native_with_env(store, env.clone(), path_readlink),
"path_remove_directory" => Function::new_native_with_env(store, env.clone(), path_remove_directory),
"path_rename" => Function::new_native_with_env(store, env.clone(), path_rename),
"path_symlink" => Function::new_native_with_env(store, env.clone(), path_symlink),
"path_unlink_file" => Function::new_native_with_env(store, env.clone(), path_unlink_file),
"poll_oneoff" => Function::new_native_with_env(store, env.clone(), poll_oneoff),
"proc_exit" => Function::new_native_with_env(store, env.clone(), proc_exit),
"proc_raise" => Function::new_native_with_env(store, env.clone(), proc_raise),
"random_get" => Function::new_native_with_env(store, env.clone(), random_get),
"sched_yield" => Function::new_native_with_env(store, env.clone(), sched_yield),
"sock_recv" => Function::new_native_with_env(store, env.clone(), sock_recv),
"sock_send" => Function::new_native_with_env(store, env.clone(), sock_send),
"sock_shutdown" => Function::new_native_with_env(store, env.clone(), sock_shutdown),
}
}
}