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revert changes to emscripten

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This commit is contained in:
Mackenzie Clark 2019-03-28 11:55:01 -07:00
parent c684ea46f0
commit 09642c92db
17 changed files with 653 additions and 1736 deletions
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9
Cargo.lock generated
View File

@ -121,11 +121,6 @@ dependencies = [
"which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "bit_field"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "bitflags"
version = "1.0.4"
@ -2251,9 +2246,7 @@ dependencies = [
name = "wasmer-emscripten"
version = "0.2.1"
dependencies = [
"bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
"byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
"errno 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
"glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)",
@ -2263,7 +2256,6 @@ dependencies = [
"wasmer-clif-backend 0.2.0",
"wasmer-dynasm-backend 0.1.0",
"wasmer-llvm-backend 0.1.0",
"wasmer-runtime-abi 0.2.1",
"wasmer-runtime-core 0.2.1",
]
@ -2526,7 +2518,6 @@ dependencies = [
"checksum backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)" = "797c830ac25ccc92a7f8a7b9862bde440715531514594a6154e3d4a54dd769b6"
"checksum base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
"checksum bindgen 0.46.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8f7f7f0701772b17de73e4f5cbcb1dd6926f4706cba4c1ab62c5367f8bdc94e1"
"checksum bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ed8765909f9009617974ab6b7d332625b320b33c326b1e9321382ef1999b5d56"
"checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
"checksum blake2b_simd 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ce2571a6cd634670daa2977cc894c1cc2ba57c563c498e5a82c35446f34d056e"
"checksum blob 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "19803aa44ff8b43123bbe369efaddcb638ea7dc332e543972dd95ac7cb148b92"

2
Cargo.toml
View File

@ -45,4 +45,4 @@ debug = ["wasmer-clif-backend/debug", "wasmer-runtime-core/debug"]
fast-tests = []
llvm = ["wasmer-llvm-backend"]
dynasm = ["wasmer-dynasm-backend"]
vfs = ["wasmer-runtime-abi", "wasmer-emscripten/vfs"]
vfs = ["wasmer-runtime-abi"]

2
Makefile
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@ -47,8 +47,6 @@ test-nightly:
test-emscripten:
cargo test --manifest-path lib/emscripten/Cargo.toml --features clif -- --test-threads=1 $(runargs)
cargo test --manifest-path lib/emscripten/Cargo.toml --features llvm -- --test-threads=1 $(runargs)
cargo test --manifest-path lib/emscripten/Cargo.toml _vfs --features clif,vfs -- --test-threads=1 $(runargs)
cargo test --manifest-path lib/emscripten/Cargo.toml _vfs --features llvm,vfs -- --test-threads=1 $(runargs)
test-emscripten-nightly:
cargo test --manifest-path lib/emscripten/Cargo.toml --features dynasm -- --test-threads=1 $(runargs)

12
lib/emscripten/Cargo.toml
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@ -9,20 +9,15 @@ edition = "2018"
build = "build/mod.rs"
[dependencies]
bit_field = "0.9.0"
byteorder = "1"
errno = "0.2.4"
wasmer-runtime-core = { path = "../runtime-core", version = "0.2.1" }
lazy_static = "1.2.0"
libc = "0.2.49"
byteorder = "1"
time = "0.1.41"
wasmer-runtime-core = { path = "../runtime-core", version = "0.2.1" }
wasmer-clif-backend = { path = "../clif-backend", version = "0.2.0" }
wasmer-dynasm-backend = { path = "../dynasm-backend", version = "0.1.0", optional = true }
wasmer-llvm-backend = { path = "../llvm-backend", version = "0.1.0", optional = true }
[target.'cfg(unix)'.dependencies]
wasmer-runtime-abi = { path = "../runtime-abi", optional = true }
[target.'cfg(windows)'.dependencies]
rand = "0.6"
@ -35,5 +30,4 @@ glob = "0.2.11"
[features]
clif = []
llvm = ["wasmer-llvm-backend"]
dynasm = ["wasmer-dynasm-backend"]
vfs = ["wasmer-runtime-abi"]
dynasm = ["wasmer-dynasm-backend"]

31
lib/emscripten/src/env/unix/mod.rs vendored
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@ -1,11 +1,14 @@
/// NOTE: These syscalls only support wasm_32 for now because they take u32 offset
use libc::{c_int, getenv, getpwnam as libc_getpwnam, putenv, setenv, sysconf, unsetenv};
use libc::{
c_int, getenv, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam, putenv, setenv, sysconf,
unsetenv,
};
use std::ffi::CStr;
use std::mem;
use std::os::raw::c_char;
use crate::env::call_malloc;
use crate::utils::copy_cstr_into_wasm;
use crate::utils::{copy_cstr_into_wasm, copy_terminated_array_of_cstrs};
use wasmer_runtime_core::vm::Ctx;
// #[no_mangle]
@ -118,7 +121,7 @@ pub fn _getgrnam(ctx: &mut Ctx, name_ptr: c_int) -> c_int {
};
unsafe {
let group = &*libc::getgrnam(name.as_ptr());
let group = &*libc_getgrnam(name.as_ptr());
let group_struct_offset = call_malloc(ctx, mem::size_of::<GuestGroup>() as _);
let group_struct_ptr =
@ -137,25 +140,3 @@ pub fn _sysconf(_ctx: &mut Ctx, name: c_int) -> i32 {
// TODO: Implement like emscripten expects regarding memory/page size
unsafe { sysconf(name) as i32 } // TODO review i64
}
/// initgroups
pub fn _initgroups(_ctx: &mut Ctx, _user_offset: u32, _gid: u32) -> c_int {
0
}
unsafe fn copy_terminated_array_of_cstrs(_ctx: &mut Ctx, cstrs: *mut *mut c_char) -> u32 {
let _total_num = {
let mut ptr = cstrs;
let mut counter = 0;
while !(*ptr).is_null() {
counter += 1;
ptr = ptr.add(1);
}
counter
};
debug!(
"emscripten::copy_terminated_array_of_cstrs::total_num: {}",
_total_num
);
0
}

5
lib/emscripten/src/env/windows/mod.rs vendored
View File

@ -131,8 +131,3 @@ pub fn _sysconf(_ctx: &mut Ctx, name: c_int) -> c_long {
// stub because sysconf is not valid on windows
0
}
/// initgroups
pub fn _initgroups(_ctx: &mut Ctx, _user_offset: u32, _gid: u32) -> c_int {
0
}

33
lib/emscripten/src/lib.rs
View File

@ -54,12 +54,6 @@ pub use self::utils::{
get_emscripten_table_size, is_emscripten_module,
};
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
use crate::syscalls::EmscriptenVfs;
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
use wasmer_runtime_abi::vfs::vfs::Vfs;
// TODO: Magic number - how is this calculated?
const TOTAL_STACK: u32 = 5_242_880;
// TODO: make this variable
@ -128,9 +122,6 @@ pub struct EmscriptenData<'a> {
pub dyn_call_vijiii: Option<Func<'a, (i32, i32, i32, i32, i32, i32, i32)>>,
pub dyn_call_vijj: Option<Func<'a, (i32, i32, i32, i32, i32, i32)>>,
pub dyn_call_viidii: Option<Func<'a, (i32, i32, i32, f64, i32, i32)>>,
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
pub vfs: Option<EmscriptenVfs>,
}
impl<'a> EmscriptenData<'a> {
@ -235,38 +226,17 @@ impl<'a> EmscriptenData<'a> {
dyn_call_vijiii,
dyn_call_vijj,
dyn_call_viidii,
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
vfs: None,
}
}
}
pub fn run_emscripten_instance(
module: &Module,
_module: &Module,
instance: &mut Instance,
path: &str,
args: Vec<&str>,
) -> CallResult<()> {
let mut data = EmscriptenData::new(instance);
// Construct a new virtual filesystem and inject it into the emscripten data
// This is behind a feature flag for now, but will be default in the future
#[cfg(any(not(feature = "vfs"), target_os = "windows"))]
let _ = module;
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
{
data.vfs = match module.info().custom_sections.get("wasmer:fs") {
Some(bytes) => match Vfs::from_compressed_bytes(&bytes[..]) {
Ok(vfs) => {
let emscripten_vfs = EmscriptenVfs::new(vfs);
Some(emscripten_vfs)
}
Err(_) => None,
},
None => None,
};
}
let data_ptr = &mut data as *mut _ as *mut c_void;
instance.context_mut().data = data_ptr;
@ -506,7 +476,6 @@ pub fn generate_emscripten_env(globals: &mut EmscriptenGlobals) -> ImportObject
"_getpagesize" => func!(crate::env::_getpagesize),
"_sysconf" => func!(crate::env::_sysconf),
"_getaddrinfo" => func!(crate::env::_getaddrinfo),
"_initgroups" => func!(crate::env::_initgroups),
// Syscalls
"___syscall1" => func!(crate::syscalls::___syscall1),

151
lib/emscripten/src/syscalls/emscripten_vfs.rs
View File

@ -1,151 +0,0 @@
use std::cell::RefCell;
use std::collections::BTreeMap;
use std::io;
use std::path::Path;
use std::rc::Rc;
use wasmer_runtime_abi::vfs::device_file;
use wasmer_runtime_abi::vfs::file_like::{FileLike, Metadata};
use wasmer_runtime_abi::vfs::vfs::Vfs;
pub type Fd = i32;
pub enum FileHandle {
Socket(Fd),
Vf(Rc<RefCell<dyn FileLike>>),
}
pub struct EmscriptenVfs {
pub fd_map: BTreeMap<i32, FileHandle>,
pub vfs: Vfs,
}
impl EmscriptenVfs {
pub fn new(mut vfs: Vfs) -> Self {
let mut fd_map = BTreeMap::new();
let stdin = Rc::new(RefCell::new(device_file::Stdin));
vfs.create_device_file("/dev/stdin", stdin.clone());
fd_map.insert(0, FileHandle::Vf(stdin));
let stdout = Rc::new(RefCell::new(device_file::Stdout));
vfs.create_device_file("/dev/stdout", stdout.clone());
fd_map.insert(1, FileHandle::Vf(stdout));
let stderr = Rc::new(RefCell::new(device_file::Stderr));
vfs.create_device_file("/dev/stderr", stderr.clone());
fd_map.insert(2, FileHandle::Vf(stderr));
EmscriptenVfs { fd_map, vfs }
}
pub fn make_dir<P: AsRef<Path>>(&mut self, path: P) -> () {
self.vfs.make_dir(path);
}
pub fn path_metadata<P: AsRef<Path>>(&mut self, path: P) -> Option<Metadata> {
if let Some(file) = self.vfs.open_file(path) {
RefCell::borrow(&file).metadata().ok()
} else {
None
}
}
pub fn close_file_descriptor(&mut self, fd: i32) -> i32 {
match self.fd_map.remove(&fd) {
Some(FileHandle::Vf(_)) => 0,
Some(FileHandle::Socket(fd)) => unsafe { libc::close(fd) },
_ => -1,
}
}
pub fn next_lowest_fd_raw(&self) -> i32 {
let fd_map = &self.fd_map;
let mut next_lowest_fd = 0;
for (vfd, _) in fd_map.iter() {
let host_fd = *vfd;
if host_fd == next_lowest_fd {
next_lowest_fd += 1;
} else if host_fd < next_lowest_fd {
panic!("Should not be here.");
} else {
break;
}
}
next_lowest_fd
}
pub fn get_host_socket_fd(&self, fd: i32) -> Option<Fd> {
match self.fd_map.get(&fd) {
Some(FileHandle::Socket(fd)) => Some(*fd),
_ => None,
}
}
pub fn open_file<P: AsRef<std::path::Path>>(&mut self, path: P) -> i32 {
match self.vfs.open_file(path) {
Some(file) => {
let fd = self.next_lowest_fd_raw();
let handle = FileHandle::Vf(file);
self.fd_map.insert(fd, handle);
fd
}
None => -1,
}
}
pub fn write_file(
&mut self,
fd: i32,
buf_slice: &mut [u8],
count: usize,
) -> Result<usize, EmscriptenVfsError> {
match self.fd_map.get(&fd) {
Some(FileHandle::Vf(file)) => {
let mut mut_ref = RefCell::borrow_mut(file);
mut_ref
.write_file(buf_slice, 0)
.map_err(|e| EmscriptenVfsError::Io(e))
}
Some(FileHandle::Socket(host_fd)) => unsafe {
let result = libc::write(*host_fd, buf_slice.as_ptr() as _, count as _);
if result == -1 {
Err(EmscriptenVfsError::Errno(errno::errno()))
} else {
Ok(result as usize)
}
},
_ => Err(EmscriptenVfsError::FileSystemError),
}
}
pub fn read_file(&self, fd: i32, buf_slice: &mut [u8]) -> usize {
match self.fd_map.get(&fd) {
Some(FileHandle::Vf(file)) => {
let count = {
let mut result = RefCell::borrow_mut(&file);
let result = result.read_file(buf_slice, 0);
result.unwrap()
};
count as _
}
Some(FileHandle::Socket(host_fd)) => unsafe {
let buf_addr = buf_slice.as_ptr() as _;
libc::write(*host_fd, buf_addr, buf_slice.len()) as usize
},
_ => 0,
}
}
pub fn new_socket_fd(&mut self, host_fd: Fd) -> Fd {
let fd = self.next_lowest_fd_raw();
self.fd_map.insert(fd, FileHandle::Socket(host_fd));
fd
}
}
#[derive(Debug)]
pub enum EmscriptenVfsError {
Io(io::Error),
Errno(errno::Errno),
FileSystemError,
}

159
lib/emscripten/src/syscalls/mod.rs
View File

@ -4,26 +4,44 @@ mod unix;
#[cfg(windows)]
mod windows;
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
mod emscripten_vfs;
#[cfg(unix)]
pub use self::unix::*;
#[cfg(windows)]
pub use self::windows::*;
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
pub use self::emscripten_vfs::*;
use super::utils::copy_stat_into_wasm;
use super::varargs::VarArgs;
use byteorder::{ByteOrder, LittleEndian};
/// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
/// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
use libc::{c_int, c_void, chdir, exit, getpid, lseek, rmdir};
use libc::{
// ENOTTY,
c_int,
c_void,
chdir,
// fcntl, setsockopt, getppid
close,
dup2,
exit,
fstat,
getpid,
// iovec,
lseek,
off_t,
// open,
read,
// readv,
rmdir,
// writev,
stat,
write,
// sockaddr_in,
};
use wasmer_runtime_core::vm::Ctx;
use super::env;
use std::cell::Cell;
#[allow(unused_imports)]
use std::io::Error;
use std::mem;
@ -38,6 +56,39 @@ pub fn ___syscall1(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) {
}
}
/// read
pub fn ___syscall3(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// -> ssize_t
debug!("emscripten::___syscall3 (read) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut c_void;
let ret = unsafe { read(fd, buf_addr, count as _) };
debug!("=> ret: {}", ret);
ret as _
}
/// write
pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall4 (write) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *const c_void;
unsafe { write(fd, buf_addr, count as _) as i32 }
}
/// close
pub fn ___syscall6(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall6 (close) {}", _which);
let fd: i32 = varargs.get(ctx);
debug!("fd: {}", fd);
unsafe { close(fd) }
}
// chdir
pub fn ___syscall12(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall12 (chdir) {}", _which);
@ -56,6 +107,11 @@ pub fn ___syscall10(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
-1
}
pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall15");
-1
}
// getpid
pub fn ___syscall20(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall20 (getpid)");
@ -75,16 +131,51 @@ pub fn ___syscall40(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
unsafe { rmdir(pathname_addr) }
}
// pipe
pub fn ___syscall42(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall42 (pipe)");
// offset to a file descriptor, which contains a read end and write end, 2 integers
let fd_offset: u32 = varargs.get(ctx);
let emscripten_memory = ctx.memory(0);
// convert the file descriptor into a vec with two slots
let mut fd_vec: Vec<c_int> = emscripten_memory.view()[((fd_offset / 4) as usize)..]
.iter()
.map(|pipe_end: &Cell<c_int>| pipe_end.get())
.take(2)
.collect();
// get it as a mutable pointer
let fd_ptr = fd_vec.as_mut_ptr();
// call pipe and store the pointers in this array
#[cfg(target_os = "windows")]
let result: c_int = unsafe { libc::pipe(fd_ptr, 2048, 0) };
#[cfg(not(target_os = "windows"))]
let result: c_int = unsafe { libc::pipe(fd_ptr) };
result
}
pub fn ___syscall60(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall60");
-1
}
// dup2
pub fn ___syscall63(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall63 (dup2) {}", _which);
let src: i32 = varargs.get(ctx);
let dst: i32 = varargs.get(ctx);
unsafe { dup2(src, dst) }
}
// getppid
pub fn ___syscall64(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall64 (getppid)");
let result = unsafe { getpid() };
result
unsafe { getpid() }
}
pub fn ___syscall66(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
@ -173,7 +264,7 @@ pub fn ___syscall140(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
let offset_low: i32 = varargs.get(ctx);
let result_ptr_value = varargs.get::<i32>(ctx);
let whence: i32 = varargs.get(ctx);
let offset = offset_low as libc::off_t;
let offset = offset_low as off_t;
let ret = unsafe { lseek(fd, offset, whence) as i32 };
#[allow(clippy::cast_ptr_alignment)]
let result_ptr = emscripten_memory_pointer!(ctx.memory(0), result_ptr_value) as *mut i32;
@ -219,7 +310,43 @@ pub fn ___syscall145(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> i32
as *mut c_void;
let iov_len = (*guest_iov_addr).iov_len as _;
// debug!("=> iov_addr: {:?}, {:?}", iov_base, iov_len);
let curr = libc::read(fd, iov_base, iov_len);
let curr = read(fd, iov_base, iov_len);
if curr < 0 {
return -1;
}
ret += curr;
}
// debug!(" => ret: {}", ret);
ret as _
}
}
// writev
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall146(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// -> ssize_t
debug!("emscripten::___syscall146 (writev) {}", _which);
let fd: i32 = varargs.get(ctx);
let iov: i32 = varargs.get(ctx);
let iovcnt: i32 = varargs.get(ctx);
#[repr(C)]
struct GuestIovec {
iov_base: i32,
iov_len: i32,
}
debug!("=> fd: {}, iov: {}, iovcnt = {}", fd, iov, iovcnt);
let mut ret = 0;
unsafe {
for i in 0..iovcnt {
let guest_iov_addr =
emscripten_memory_pointer!(ctx.memory(0), (iov + i * 8)) as *mut GuestIovec;
let iov_base = emscripten_memory_pointer!(ctx.memory(0), (*guest_iov_addr).iov_base)
as *const c_void;
let iov_len = (*guest_iov_addr).iov_len as _;
// debug!("=> iov_addr: {:?}, {:?}", iov_base, iov_len);
let curr = write(fd, iov_base, iov_len);
if curr < 0 {
return -1;
}
@ -254,8 +381,8 @@ pub fn ___syscall195(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
unsafe {
let mut _stat: libc::stat = std::mem::zeroed();
let ret = libc::stat(pathname_addr, &mut _stat);
let mut _stat: stat = std::mem::zeroed();
let ret = stat(pathname_addr, &mut _stat);
debug!(
"=> pathname: {}, buf: {}, path: {} = {}\nlast os error: {}",
pathname,
@ -267,7 +394,7 @@ pub fn ___syscall195(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
if ret != 0 {
return ret;
}
crate::utils::copy_stat_into_wasm(ctx, buf, &_stat);
copy_stat_into_wasm(ctx, buf, &_stat);
}
0
}
@ -280,12 +407,12 @@ pub fn ___syscall197(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
unsafe {
let mut stat = std::mem::zeroed();
let ret = libc::fstat(fd, &mut stat);
let ret = fstat(fd, &mut stat);
debug!("ret: {}", ret);
if ret != 0 {
return ret;
}
crate::utils::copy_stat_into_wasm(ctx, buf, &stat);
copy_stat_into_wasm(ctx, buf, &stat);
}
0

721
lib/emscripten/src/syscalls/unix/host_fs.rs → lib/emscripten/src/syscalls/unix.rs
View File

@ -1,32 +1,102 @@
use crate::utils::copy_stat_into_wasm;
use crate::varargs::VarArgs;
use libc::{c_int, c_void, ioctl, sockaddr, socklen_t};
/// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
/// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
use libc::{
accept,
access,
bind,
c_char,
c_int,
c_void,
chown,
// fcntl, setsockopt, getppid
connect,
dup,
dup2,
fchmod,
fchown,
fcntl,
// ENOTTY,
fsync,
getgid,
getgroups,
getpeername,
getrusage,
getsockname,
getsockopt,
gid_t,
in_addr_t,
in_port_t,
ioctl,
lchown,
link,
// iovec,
listen,
mkdir,
mode_t,
msghdr,
nice,
off_t,
open,
pid_t,
pread,
pwrite,
// readv,
recvfrom,
recvmsg,
// ENOTTY,
rusage,
sa_family_t,
// writev,
select,
sendmsg,
sendto,
setpgid,
setsockopt,
size_t,
sockaddr,
socket,
socklen_t,
symlink,
uid_t,
uname,
utsname,
EINVAL,
// sockaddr_in,
FIOCLEX,
FIONBIO,
F_GETFD,
F_SETFD,
SOL_SOCKET,
SO_REUSEADDR,
TIOCGWINSZ,
};
use wasmer_runtime_core::vm::Ctx;
/// read
pub fn ___syscall3(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
debug!("emscripten::___syscall3 (read) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut c_void;
let ret = unsafe { libc::read(fd, buf_addr, count as _) };
debug!("=> ret: {}", ret);
ret as _
#[allow(unused_imports)]
use std::io::Error;
use std::mem;
// Linking to functions that are not provided by rust libc
#[cfg(target_os = "macos")]
#[link(name = "c")]
extern "C" {
pub fn wait4(pid: pid_t, status: *mut c_int, options: c_int, rusage: *mut rusage) -> pid_t;
pub fn madvise(addr: *mut c_void, len: size_t, advice: c_int) -> c_int;
pub fn fdatasync(fd: c_int) -> c_int;
pub fn lstat64(path: *const c_char, buf: *mut c_void) -> c_int;
}
/// write
pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall4 (write) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *const c_void;
let ret = unsafe { libc::write(fd, buf_addr, count as _) as i32 };
ret
}
#[cfg(not(target_os = "macos"))]
use libc::{fallocate, fdatasync, ftruncate64, lstat64, madvise, wait4};
// Another conditional constant for name resolution: Macos et iOS use
// SO_NOSIGPIPE as a setsockopt flag to disable SIGPIPE emission on socket.
// Other platforms do otherwise.
#[cfg(target_os = "darwin")]
use libc::SO_NOSIGPIPE;
#[cfg(not(target_os = "darwin"))]
const SO_NOSIGPIPE: c_int = 0;
/// open
pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
@ -36,61 +106,245 @@ pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
let mode: u32 = varargs.get(ctx);
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
let _path_str = unsafe { std::ffi::CStr::from_ptr(pathname_addr).to_str().unwrap() };
let fd = unsafe { libc::open(pathname_addr, flags, mode) };
let fd = unsafe { open(pathname_addr, flags, mode) };
debug!(
"=> pathname: {}, flags: {}, mode: {} = fd: {}\npath: {}",
pathname, flags, mode, fd, _path_str
"=> pathname: {}, flags: {}, mode: {} = fd: {}\npath: {}\nlast os error: {}",
pathname,
flags,
mode,
fd,
_path_str,
Error::last_os_error(),
);
fd
}
/// close
pub fn ___syscall6(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall6 (close) {}", _which);
let fd: i32 = varargs.get(ctx);
debug!("fd: {}", fd);
unsafe { libc::close(fd) }
/// link
pub fn ___syscall9(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall9 (link) {}", _which);
let oldname: c_int = varargs.get(ctx);
let newname: c_int = varargs.get(ctx);
let oldname_ptr = emscripten_memory_pointer!(ctx.memory(0), oldname) as *const i8;
let newname_ptr = emscripten_memory_pointer!(ctx.memory(0), newname) as *const i8;
let result = unsafe { link(oldname_ptr, newname_ptr) };
debug!(
"=> oldname: {}, newname: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(oldname_ptr).to_str().unwrap() },
unsafe { std::ffi::CStr::from_ptr(newname_ptr).to_str().unwrap() },
result,
);
result
}
/// chmod
pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall15");
-1
/// getrusage
pub fn ___syscall77(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall77 (getrusage) {}", _which);
let resource: c_int = varargs.get(ctx);
let rusage_ptr: c_int = varargs.get(ctx);
#[allow(clippy::cast_ptr_alignment)]
let rusage = emscripten_memory_pointer!(ctx.memory(0), rusage_ptr) as *mut rusage;
assert_eq!(8, mem::align_of_val(&rusage));
unsafe { getrusage(resource, rusage) }
}
/// mkdir
/// symlink
pub fn ___syscall83(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall83 (symlink) {}", _which);
let path1_ptr: c_int = varargs.get(ctx);
let path2_ptr: c_int = varargs.get(ctx);
let path1 = emscripten_memory_pointer!(ctx.memory(0), path1_ptr) as *mut i8;
let path2 = emscripten_memory_pointer!(ctx.memory(0), path2_ptr) as *mut i8;
let result = unsafe { symlink(path1, path2) };
debug!(
"=> path1: {}, path2: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(path1).to_str().unwrap() },
unsafe { std::ffi::CStr::from_ptr(path2).to_str().unwrap() },
result,
);
result
}
/// ftruncate64
pub fn ___syscall194(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall194 (ftruncate64) {}", _which);
let _fd: c_int = varargs.get(ctx);
let _length: i64 = varargs.get(ctx);
#[cfg(not(target_os = "macos"))]
unsafe {
ftruncate64(_fd, _length)
}
#[cfg(target_os = "macos")]
unimplemented!()
}
/// lchown
pub fn ___syscall198(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall198 (lchown) {}", _which);
let path: c_int = varargs.get(ctx);
let uid: uid_t = varargs.get(ctx);
let gid: gid_t = varargs.get(ctx);
let path_ptr = emscripten_memory_pointer!(ctx.memory(0), path) as *const i8;
let result = unsafe { lchown(path_ptr, uid, gid) };
debug!(
"=> path: {}, uid: {}, gid: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(path_ptr).to_str().unwrap() },
uid,
gid,
result,
);
result
}
/// getgroups
pub fn ___syscall205(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall205 (getgroups) {}", _which);
let ngroups_max: c_int = varargs.get(ctx);
let groups: c_int = varargs.get(ctx);
#[allow(clippy::cast_ptr_alignment)]
let gid_ptr = emscripten_memory_pointer!(ctx.memory(0), groups) as *mut gid_t;
assert_eq!(4, mem::align_of_val(&gid_ptr));
let result = unsafe { getgroups(ngroups_max, gid_ptr) };
debug!(
"=> ngroups_max: {}, gid_ptr: {:?}, result: {}",
ngroups_max, gid_ptr, result,
);
result
}
// chown
pub fn ___syscall212(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall212 (chown) {}", _which);
let pathname: u32 = varargs.get(ctx);
let owner: u32 = varargs.get(ctx);
let group: u32 = varargs.get(ctx);
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
unsafe { chown(pathname_addr, owner, group) }
}
/// madvise
pub fn ___syscall219(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall212 (chown) {}", _which);
let addr_ptr: c_int = varargs.get(ctx);
let len: usize = varargs.get(ctx);
let advice: c_int = varargs.get(ctx);
let addr = emscripten_memory_pointer!(ctx.memory(0), addr_ptr) as *mut c_void;
unsafe { madvise(addr, len, advice) }
}
/// access
pub fn ___syscall33(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall33 (access) {}", _which);
let path_ptr: c_int = varargs.get(ctx);
let amode: c_int = varargs.get(ctx);
let path = emscripten_memory_pointer!(ctx.memory(0), path_ptr) as *const i8;
let result = unsafe { access(path, amode) };
debug!(
"=> path: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(path).to_str().unwrap() },
result
);
result
}
/// nice
pub fn ___syscall34(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall34 (nice) {}", _which);
let inc_r: c_int = varargs.get(ctx);
unsafe { nice(inc_r) }
}
// mkdir
pub fn ___syscall39(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall39 (mkdir) {}", _which);
let pathname: u32 = varargs.get(ctx);
let mode: u32 = varargs.get(ctx);
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
unsafe { libc::mkdir(pathname_addr, mode as _) }
unsafe { mkdir(pathname_addr, mode as _) }
}
/// pipe
pub fn ___syscall42(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall42 (pipe)");
// offset to a file descriptor, which contains a read end and write end, 2 integers
let fd_offset: u32 = varargs.get(ctx);
/// dup
pub fn ___syscall41(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall41 (dup) {}", _which);
let fd: c_int = varargs.get(ctx);
unsafe { dup(fd) }
}
let emscripten_memory = ctx.memory(0);
/// getgid
pub fn ___syscall200(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall200 (getgid)");
unsafe { getgid() as i32 }
}
// convert the file descriptor into a vec with two slots
let mut fd_vec: Vec<c_int> = emscripten_memory.view()[((fd_offset / 4) as usize)..]
.iter()
.map(|pipe_end: &std::cell::Cell<c_int>| pipe_end.get())
.take(2)
.collect();
// getgid
pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall201 (getgid)");
unsafe {
// Maybe fix: Emscripten returns 0 always
getgid() as i32
}
}
// get it as a mutable pointer
let fd_ptr = fd_vec.as_mut_ptr();
// getgid32
pub fn ___syscall202(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
// gid_t
debug!("emscripten::___syscall202 (getgid32)");
unsafe {
// Maybe fix: Emscripten returns 0 always
getgid() as _
}
}
// call pipe and store the pointers in this array
#[cfg(target_os = "windows")]
let result: c_int = unsafe { libc::pipe(fd_ptr, 2048, 0) };
#[cfg(not(target_os = "windows"))]
let result: c_int = unsafe { libc::pipe(fd_ptr) };
result
/// fchown
pub fn ___syscall207(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall207 (fchown) {}", _which);
let fd: c_int = varargs.get(ctx);
let owner: uid_t = varargs.get(ctx);
let group: gid_t = varargs.get(ctx);
unsafe { fchown(fd, owner, group) }
}
/// dup3
pub fn ___syscall330(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
// Implementation based on description at https://linux.die.net/man/2/dup3
debug!("emscripten::___syscall330 (dup3)");
let oldfd: c_int = varargs.get(ctx);
let newfd: c_int = varargs.get(ctx);
let flags: c_int = varargs.get(ctx);
if oldfd == newfd {
return EINVAL;
}
let res = unsafe { dup2(oldfd, newfd) };
// Set flags on newfd (https://www.gnu.org/software/libc/manual/html_node/Descriptor-Flags.html)
let mut old_flags = unsafe { fcntl(newfd, F_GETFD, 0) };
if old_flags > 0 {
old_flags |= flags;
} else if old_flags == 0 {
old_flags &= !flags;
}
unsafe {
fcntl(newfd, F_SETFD, old_flags);
}
debug!(
"=> oldfd: {}, newfd: {}, flags: {} = pid: {}",
oldfd, newfd, flags, res
);
res
}
/// ioctl
@ -105,7 +359,7 @@ pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
// FIONBIO
let argp: u32 = varargs.get(ctx);
let argp_ptr = emscripten_memory_pointer!(ctx.memory(0), argp) as *mut c_void;
let ret = unsafe { ioctl(fd, libc::FIONBIO, argp_ptr) };
let ret = unsafe { ioctl(fd, FIONBIO, argp_ptr) };
debug!("ret(FIONBIO): {}", ret);
ret
// 0
@ -114,7 +368,7 @@ pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
// TIOCGWINSZ
let argp: u32 = varargs.get(ctx);
let argp_ptr = emscripten_memory_pointer!(ctx.memory(0), argp) as *mut c_void;
let ret = unsafe { ioctl(fd, libc::TIOCGWINSZ, argp_ptr) };
let ret = unsafe { ioctl(fd, TIOCGWINSZ, argp_ptr) };
debug!("ret(TIOCGWINSZ): {} (harcoded to 0)", ret);
// ret
// TODO: We hardcode the value to have emscripten tests pass, as for some reason
@ -135,16 +389,6 @@ pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
}
}
/// dup2
pub fn ___syscall63(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall63 (dup2) {}", _which);
let src: i32 = varargs.get(ctx);
let dst: i32 = varargs.get(ctx);
unsafe { libc::dup2(src, dst) }
}
// socketcall
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
@ -154,55 +398,49 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
#[repr(C)]
pub struct GuestSockaddrIn {
pub sin_family: libc::sa_family_t,
// u16
pub sin_port: libc::in_port_t,
// u16
pub sin_addr: GuestInAddr,
// u32
pub sin_zero: [u8; 8], // u8 * 8
// 2 + 2 + 4 + 8 = 16
pub sin_family: sa_family_t, // u16
pub sin_port: in_port_t, // u16
pub sin_addr: GuestInAddr, // u32
pub sin_zero: [u8; 8], // u8 * 8
// 2 + 2 + 4 + 8 = 16
}
#[repr(C)]
pub struct GuestInAddr {
pub s_addr: libc::in_addr_t, // u32
pub s_addr: in_addr_t, // u32
}
// debug!("GuestSockaddrIn = {}", size_of::<GuestSockaddrIn>());
pub struct LinuxSockAddr {
pub sa_family: u16,
pub sa_data: [libc::c_char; 14],
pub sa_data: [c_char; 14],
}
match call {
1 => {
debug!("socket: socket");
// Another conditional constant for name resolution: Macos et iOS use
// SO_NOSIGPIPE as a setsockopt flag to disable SIGPIPE emission on socket.
// Other platforms do otherwise.
#[cfg(target_os = "darwin")]
use libc::SO_NOSIGPIPE;
#[cfg(not(target_os = "darwin"))]
const SO_NOSIGPIPE: c_int = 0;
// socket (domain: c_int, ty: c_int, protocol: c_int) -> c_int
let domain: i32 = socket_varargs.get(ctx);
let ty: i32 = socket_varargs.get(ctx);
let protocol: i32 = socket_varargs.get(ctx);
let fd = unsafe { libc::socket(domain, ty, protocol) };
let fd = unsafe { socket(domain, ty, protocol) };
// set_cloexec
unsafe {
ioctl(fd, libc::FIOCLEX);
ioctl(fd, FIOCLEX);
};
let _err = errno::errno();
let _result =
unsafe { libc::setsockopt(fd, libc::SOL_SOCKET, SO_NOSIGPIPE, 0 as *const _, 4) };
let _err2 = errno::errno();
type T = u32;
let payload = 1 as *const T as _;
unsafe {
setsockopt(
fd,
SOL_SOCKET,
SO_NOSIGPIPE,
payload,
mem::size_of::<T>() as socklen_t,
);
};
debug!(
"=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}",
@ -222,10 +460,11 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
// Debug received address
let _proper_address = address as *const GuestSockaddrIn;
debug!(
"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
unsafe { (*_proper_address).sin_family }, unsafe { (*_proper_address).sin_port }, unsafe { (*_proper_address).sin_addr.s_addr }
);
let status = unsafe { libc::bind(socket, address, address_len) };
);
let status = unsafe { bind(socket, address, address_len) };
// debug!("=> status: {}", status);
debug!(
"=> socketfd: {}, address: {:?}, address_len: {} = status: {}",
@ -242,14 +481,14 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let address: u32 = socket_varargs.get(ctx);
let address_len = socket_varargs.get(ctx);
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
unsafe { libc::connect(socket, address, address_len) }
unsafe { connect(socket, address, address_len) }
}
4 => {
debug!("socket: listen");
// listen (socket: c_int, backlog: c_int) -> c_int
let socket = socket_varargs.get(ctx);
let backlog: i32 = socket_varargs.get(ctx);
let status = unsafe { libc::listen(socket, backlog) };
let status = unsafe { listen(socket, backlog) };
debug!(
"=> socketfd: {}, backlog: {} = status: {}",
socket, backlog, status
@ -272,20 +511,18 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
// let mut address_len_addr: socklen_t = 0;
let fd = unsafe { libc::accept(socket, address, address_len_addr) };
let fd = unsafe { accept(socket, address, address_len_addr) };
unsafe {
let address_linux =
emscripten_memory_pointer!(ctx.memory(0), address_addr) as *mut LinuxSockAddr;
(*address_linux).sa_family = (*address).sa_family as u16;
(*address_linux).sa_data = (*address).sa_data;
let _proper_address = address as *const GuestSockaddrIn;
let _x = 10;
};
// set_cloexec
unsafe {
ioctl(fd, libc::FIOCLEX);
ioctl(fd, FIOCLEX);
};
debug!("fd: {}", fd);
@ -301,7 +538,7 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
let address_len_addr =
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
unsafe { libc::getsockname(socket, address, address_len_addr) }
unsafe { getsockname(socket, address, address_len_addr) }
}
7 => {
debug!("socket: getpeername");
@ -312,7 +549,7 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
let address_len_addr =
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
unsafe { libc::getpeername(socket, address, address_len_addr) }
unsafe { getpeername(socket, address, address_len_addr) }
}
11 => {
debug!("socket: sendto");
@ -325,12 +562,12 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let address_len = socket_varargs.get(ctx);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
unsafe { libc::sendto(socket, buf_addr, flags, len, address, address_len) as i32 }
unsafe { sendto(socket, buf_addr, flags, len, address, address_len) as i32 }
}
12 => {
debug!("socket: recvfrom");
// recvfrom (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
let socket: i32 = socket_varargs.get(ctx);
let socket = socket_varargs.get(ctx);
let buf: u32 = socket_varargs.get(ctx);
let flags = socket_varargs.get(ctx);
let len: i32 = socket_varargs.get(ctx);
@ -340,14 +577,7 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
let address_len_addr =
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
let recv_result = unsafe {
libc::recvfrom(socket, buf_addr, flags, len, address, address_len_addr) as i32
};
debug!(
"recvfrom: socket: {}, flags: {}, len: {}, result: {}",
socket, flags, len, recv_result
);
recv_result
unsafe { recvfrom(socket, buf_addr, flags, len, address, address_len_addr) as i32 }
}
14 => {
debug!("socket: setsockopt");
@ -359,15 +589,15 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let socket = socket_varargs.get(ctx);
// SOL_SOCKET = 0xffff (BSD, Linux)
let level: i32 = libc::SOL_SOCKET;
let level: i32 = SOL_SOCKET;
let _: u32 = socket_varargs.get(ctx);
// SO_REUSEADDR = 0x4 (BSD, Linux)
let name: i32 = libc::SO_REUSEADDR;
let name: i32 = SO_REUSEADDR;
let _: u32 = socket_varargs.get(ctx);
let value: u32 = socket_varargs.get(ctx);
let option_len = socket_varargs.get(ctx);
let value_addr = emscripten_memory_pointer!(ctx.memory(0), value) as _; // Endian problem
let ret = unsafe { libc::setsockopt(socket, level, name, value_addr, option_len) };
let ret = unsafe { setsockopt(socket, level, name, value_addr, option_len) };
debug!("=> socketfd: {}, level: {} (SOL_SOCKET/0xffff), name: {} (SO_REUSEADDR/4), value_addr: {:?}, option_len: {} = status: {}", socket, level, name, value_addr, option_len, ret);
ret
@ -383,9 +613,7 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let value_addr = emscripten_memory_pointer!(ctx.memory(0), value) as _;
let option_len_addr =
emscripten_memory_pointer!(ctx.memory(0), option_len) as *mut socklen_t;
let result =
unsafe { libc::getsockopt(socket, level, name, value_addr, option_len_addr) };
result
unsafe { getsockopt(socket, level, name, value_addr, option_len_addr) }
}
16 => {
debug!("socket: sendmsg");
@ -393,8 +621,8 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let socket: i32 = socket_varargs.get(ctx);
let msg: u32 = socket_varargs.get(ctx);
let flags: i32 = socket_varargs.get(ctx);
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *const libc::msghdr;
unsafe { libc::sendmsg(socket, msg_addr, flags) as i32 }
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *const msghdr;
unsafe { sendmsg(socket, msg_addr, flags) as i32 }
}
17 => {
debug!("socket: recvmsg");
@ -402,8 +630,8 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let socket: i32 = socket_varargs.get(ctx);
let msg: u32 = socket_varargs.get(ctx);
let flags: i32 = socket_varargs.get(ctx);
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *mut libc::msghdr;
unsafe { libc::recvmsg(socket, msg_addr, flags) as i32 }
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *mut msghdr;
unsafe { recvmsg(socket, msg_addr, flags) as i32 }
}
_ => {
// others
@ -412,60 +640,7 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
}
}
/// select = ___syscall142
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall142(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall142 (newselect) {}", _which);
let nfds: i32 = varargs.get(ctx);
let readfds: u32 = varargs.get(ctx);
let writefds: u32 = varargs.get(ctx);
let _exceptfds: u32 = varargs.get(ctx);
let _timeout: i32 = varargs.get(ctx);
let readfds_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as _;
let writefds_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as _;
let result = unsafe { libc::select(nfds, readfds_ptr, writefds_ptr, 0 as _, 0 as _) };
debug!("select returns {}", result);
result
}
// writev
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall146(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// -> ssize_t
debug!("emscripten::___syscall146 (writev) {}", _which);
let fd: i32 = varargs.get(ctx);
let iov: i32 = varargs.get(ctx);
let iovcnt: i32 = varargs.get(ctx);
#[repr(C)]
struct GuestIovec {
iov_base: i32,
iov_len: i32,
}
debug!("=> fd: {}, iov: {}, iovcnt = {}", fd, iov, iovcnt);
let mut ret = 0;
unsafe {
for i in 0..iovcnt {
let guest_iov_addr =
emscripten_memory_pointer!(ctx.memory(0), (iov + i * 8)) as *mut GuestIovec;
let iov_base = emscripten_memory_pointer!(ctx.memory(0), (*guest_iov_addr).iov_base)
as *const c_void;
let iov_len = (*guest_iov_addr).iov_len as _;
// debug!("=> iov_addr: {:?}, {:?}", iov_base, iov_len);
let curr = libc::write(fd, iov_base, iov_len);
if curr < 0 {
return -1;
}
ret += curr;
}
// debug!(" => ret: {}", ret);
ret as _
}
}
/// pread
// pread
pub fn ___syscall180(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall180 (pread) {}", _which);
let fd: i32 = varargs.get(ctx);
@ -476,12 +651,13 @@ pub fn ___syscall180(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
assert_eq!(zero, 0);
}
let offset: i64 = varargs.get(ctx);
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
let pread_result = unsafe { libc::pread(fd, buf_ptr, count as _, offset) as _ };
pread_result
unsafe { pread(fd, buf_ptr, count as _, offset) as _ }
}
/// pwrite
// pwrite
pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall181 (pwrite) {}", _which);
let fd: i32 = varargs.get(ctx);
@ -492,8 +668,9 @@ pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
assert_eq!(zero, 0);
}
let offset: i64 = varargs.get(ctx);
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
let status = unsafe { libc::pwrite(fd, buf_ptr, count as _, offset) as _ };
let status = unsafe { pwrite(fd, buf_ptr, count as _, offset) as _ };
debug!(
"=> fd: {}, buf: {}, count: {}, offset: {} = status:{}",
fd, buf, count, offset, status
@ -501,75 +678,119 @@ pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
status
}
/// stat64
pub fn ___syscall195(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall195 (stat64) {}", _which);
let pathname: u32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
unsafe {
let mut _stat: libc::stat = std::mem::zeroed();
let ret = libc::stat(pathname_addr, &mut _stat);
debug!("ret: {}", ret);
if ret != 0 {
return ret;
}
copy_stat_into_wasm(ctx, buf, &_stat);
}
0
}
/// fstat64
pub fn ___syscall197(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall197 (fstat64) {}", _which);
/// fchmod
pub fn ___syscall94(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall118 (fchmod) {}", _which);
let fd: c_int = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
unsafe {
let mut stat = std::mem::zeroed();
let ret = libc::fstat(fd, &mut stat);
debug!("ret: {}", ret);
if ret != 0 {
return ret;
}
copy_stat_into_wasm(ctx, buf, &stat);
}
0
let mode: mode_t = varargs.get(ctx);
unsafe { fchmod(fd, mode) }
}
/// dup3
pub fn ___syscall330(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> libc::pid_t {
// Implementation based on description at https://linux.die.net/man/2/dup3
debug!("emscripten::___syscall330 (dup3)");
let oldfd: c_int = varargs.get(ctx);
let newfd: c_int = varargs.get(ctx);
let flags: c_int = varargs.get(ctx);
if oldfd == newfd {
return libc::EINVAL;
}
let res = unsafe { libc::dup2(oldfd, newfd) };
// Set flags on newfd (https://www.gnu.org/software/libc/manual/html_node/Descriptor-Flags.html)
let mut old_flags = unsafe { libc::fcntl(newfd, libc::F_GETFD, 0) };
if old_flags > 0 {
old_flags |= flags;
} else if old_flags == 0 {
old_flags &= !flags;
}
unsafe {
libc::fcntl(newfd, libc::F_SETFD, old_flags);
}
/// wait4
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall114(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
debug!("emscripten::___syscall114 (wait4)");
let pid: pid_t = varargs.get(ctx);
let status: u32 = varargs.get(ctx);
let options: c_int = varargs.get(ctx);
let rusage: u32 = varargs.get(ctx);
let status_addr = emscripten_memory_pointer!(ctx.memory(0), status) as *mut c_int;
let rusage_addr = emscripten_memory_pointer!(ctx.memory(0), rusage) as *mut rusage;
let res = unsafe { wait4(pid, status_addr, options, rusage_addr) };
debug!(
"=> oldfd: {}, newfd: {}, flags: {} = pid: {}",
oldfd, newfd, flags, res
"=> pid: {}, status: {:?}, options: {}, rusage: {:?} = pid: {}",
pid, status_addr, options, rusage_addr, res
);
res
}
/// fsync
pub fn ___syscall118(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall118 (fsync) {}", _which);
let fd: c_int = varargs.get(ctx);
unsafe { fsync(fd) }
}
// select
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall142(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall142 (newselect) {}", _which);
let nfds: i32 = varargs.get(ctx);
let readfds: u32 = varargs.get(ctx);
let writefds: u32 = varargs.get(ctx);
let exceptfds: u32 = varargs.get(ctx);
let _timeout: i32 = varargs.get(ctx);
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
assert!(exceptfds == 0, "`exceptfds` is not supporrted");
let readfds_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as _;
let writefds_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as _;
unsafe { select(nfds, readfds_ptr, writefds_ptr, 0 as _, 0 as _) }
}
/// fdatasync
pub fn ___syscall148(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall148 (fdatasync) {}", _which);
let fd: i32 = varargs.get(ctx);
unsafe { fdatasync(fd) }
}
// setpgid
pub fn ___syscall57(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall57 (setpgid) {}", _which);
let pid: i32 = varargs.get(ctx);
let pgid: i32 = varargs.get(ctx);
unsafe { setpgid(pid, pgid) }
}
/// uname
// NOTE: Wondering if we should return custom utsname, like Emscripten.
pub fn ___syscall122(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall122 (uname) {}", _which);
let buf: u32 = varargs.get(ctx);
debug!("=> buf: {}", buf);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut utsname;
unsafe { uname(buf_addr) }
}
/// lstat64
pub fn ___syscall196(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
debug!("emscripten::___syscall196 (lstat64) {}", _which);
let path_ptr: c_int = varargs.get(ctx);
let buf_ptr: c_int = varargs.get(ctx);
let path = emscripten_memory_pointer!(ctx.memory(0), path_ptr) as *const c_char;
let buf = emscripten_memory_pointer!(ctx.memory(0), buf_ptr) as *mut c_void;
let result = unsafe { lstat64(path, buf as _) };
debug!(
"=> path: {}, buf: {} = fd: {}\npath: {}\nlast os error: {}",
path_ptr,
buf_ptr,
result,
unsafe { std::ffi::CStr::from_ptr(path).to_str().unwrap() },
Error::last_os_error(),
);
result
}
/// fallocate
pub fn ___syscall324(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall324 (fallocate) {}", _which);
let _fd: c_int = varargs.get(ctx);
let _mode: c_int = varargs.get(ctx);
let _offset: off_t = varargs.get(ctx);
let _len: off_t = varargs.get(ctx);
#[cfg(not(target_os = "macos"))]
unsafe {
fallocate(_fd, _mode, _offset, _len)
}
#[cfg(target_os = "macos")]
{
unimplemented!()
}
}

324
lib/emscripten/src/syscalls/unix/mod.rs
View File

@ -1,324 +0,0 @@
use crate::varargs::VarArgs;
#[cfg(not(feature = "vfs"))]
pub mod host_fs;
#[cfg(all(not(target_os = "windows"), feature = "vfs"))]
pub mod vfs;
#[cfg(not(feature = "vfs"))]
pub use host_fs::*;
#[cfg(feature = "vfs")]
pub mod select;
#[cfg(feature = "vfs")]
pub use select::*;
#[cfg(feature = "vfs")]
pub use vfs::*;
/// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
/// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
use libc::{c_int, pid_t, rusage, setpgid, uname, utsname};
use wasmer_runtime_core::vm::Ctx;
// Linking to functions that are not provided by rust libc
#[cfg(target_os = "macos")]
#[link(name = "c")]
extern "C" {
pub fn wait4(pid: pid_t, status: *mut c_int, options: c_int, rusage: *mut rusage) -> pid_t;
pub fn madvise(addr: *mut libc::c_void, len: libc::size_t, advice: c_int) -> c_int;
pub fn fdatasync(fd: c_int) -> c_int;
pub fn lstat64(path: *const libc::c_char, buf: *mut libc::c_void) -> c_int;
}
#[cfg(not(target_os = "macos"))]
use libc::{fallocate, fdatasync, ftruncate64, lstat64, madvise, wait4};
/// link
pub fn ___syscall9(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall9 (link) {}", _which);
let oldname: c_int = varargs.get(ctx);
let newname: c_int = varargs.get(ctx);
let oldname_ptr = emscripten_memory_pointer!(ctx.memory(0), oldname) as *const i8;
let newname_ptr = emscripten_memory_pointer!(ctx.memory(0), newname) as *const i8;
let result = unsafe { libc::link(oldname_ptr, newname_ptr) };
debug!(
"=> oldname: {}, newname: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(oldname_ptr).to_str().unwrap() },
unsafe { std::ffi::CStr::from_ptr(newname_ptr).to_str().unwrap() },
result,
);
result
}
/// access
pub fn ___syscall33(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall33 (access) {}", _which);
let path_ptr: c_int = varargs.get(ctx);
let amode: c_int = varargs.get(ctx);
let path = emscripten_memory_pointer!(ctx.memory(0), path_ptr) as *const i8;
let result = unsafe { libc::access(path, amode) };
debug!(
"=> path: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(path).to_str().unwrap() },
result
);
result
}
/// nice
pub fn ___syscall34(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall34 (nice) {}", _which);
let inc_r: c_int = varargs.get(ctx);
unsafe { libc::nice(inc_r) }
}
/// getrusage
pub fn ___syscall77(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall77 (getrusage) {}", _which);
let resource: c_int = varargs.get(ctx);
let rusage_ptr: c_int = varargs.get(ctx);
#[allow(clippy::cast_ptr_alignment)]
let rusage = emscripten_memory_pointer!(ctx.memory(0), rusage_ptr) as *mut rusage;
assert_eq!(8, std::mem::align_of_val(&rusage));
unsafe { libc::getrusage(resource, rusage) }
}
/// dup
pub fn ___syscall41(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall41 (dup) {}", _which);
let fd: c_int = varargs.get(ctx);
unsafe { libc::dup(fd) }
}
/// setpgid
pub fn ___syscall57(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall57 (setpgid) {}", _which);
let pid: i32 = varargs.get(ctx);
let pgid: i32 = varargs.get(ctx);
unsafe { setpgid(pid, pgid) }
}
/// symlink
pub fn ___syscall83(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall83 (symlink) {}", _which);
let path1_ptr: c_int = varargs.get(ctx);
let path2_ptr: c_int = varargs.get(ctx);
let path1 = emscripten_memory_pointer!(ctx.memory(0), path1_ptr) as *mut i8;
let path2 = emscripten_memory_pointer!(ctx.memory(0), path2_ptr) as *mut i8;
let result = unsafe { libc::symlink(path1, path2) };
debug!(
"=> path1: {}, path2: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(path1).to_str().unwrap() },
unsafe { std::ffi::CStr::from_ptr(path2).to_str().unwrap() },
result,
);
result
}
/// fchmod
pub fn ___syscall94(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall118 (fchmod) {}", _which);
let fd: c_int = varargs.get(ctx);
let mode: libc::mode_t = varargs.get(ctx);
unsafe { libc::fchmod(fd, mode) }
}
/// wait4
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall114(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
debug!("emscripten::___syscall114 (wait4)");
let pid: pid_t = varargs.get(ctx);
let status: u32 = varargs.get(ctx);
let options: c_int = varargs.get(ctx);
let rusage: u32 = varargs.get(ctx);
let status_addr = emscripten_memory_pointer!(ctx.memory(0), status) as *mut c_int;
let rusage_addr = emscripten_memory_pointer!(ctx.memory(0), rusage) as *mut rusage;
let res = unsafe { wait4(pid, status_addr, options, rusage_addr) };
debug!(
"=> pid: {}, status: {:?}, options: {}, rusage: {:?} = pid: {}",
pid, status_addr, options, rusage_addr, res
);
res
}
/// fsync
pub fn ___syscall118(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall118 (fsync) {}", _which);
let fd: c_int = varargs.get(ctx);
unsafe { libc::fsync(fd) }
}
/// uname
// NOTE: Wondering if we should return custom utsname, like Emscripten.
pub fn ___syscall122(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall122 (uname) {}", _which);
let buf: u32 = varargs.get(ctx);
debug!("=> buf: {}", buf);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut utsname;
let uname_result = unsafe { uname(buf_addr) };
debug!(
"uname buf: {}",
crate::utils::read_string_from_wasm(ctx.memory(0), buf)
);
uname_result
}
/// fdatasync
pub fn ___syscall148(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall148 (fdatasync) {}", _which);
let fd: i32 = varargs.get(ctx);
unsafe { fdatasync(fd) }
}
/// ftruncate64
pub fn ___syscall194(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall194 (ftruncate64) {}", _which);
let _fd: c_int = varargs.get(ctx);
let _length: i64 = varargs.get(ctx);
#[cfg(not(target_os = "macos"))]
unsafe {
ftruncate64(_fd, _length)
}
#[cfg(target_os = "macos")]
unimplemented!()
}
/// lstat64
pub fn ___syscall196(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
debug!("emscripten::___syscall196 (lstat64) {}", _which);
let path_ptr: c_int = varargs.get(ctx);
let buf_ptr: c_int = varargs.get(ctx);
let path = emscripten_memory_pointer!(ctx.memory(0), path_ptr) as *const libc::c_char;
let buf = emscripten_memory_pointer!(ctx.memory(0), buf_ptr) as *mut libc::c_void;
let result = unsafe { lstat64(path, buf as _) };
debug!(
"=> path: {}, buf: {} = fd: {}\npath: {}\nlast os error: {}",
path_ptr,
buf_ptr,
result,
unsafe { std::ffi::CStr::from_ptr(path).to_str().unwrap() },
std::io::Error::last_os_error(),
);
result
}
/// lchown
pub fn ___syscall198(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall198 (lchown) {}", _which);
let path: c_int = varargs.get(ctx);
let uid: libc::uid_t = varargs.get(ctx);
let gid: libc::gid_t = varargs.get(ctx);
let path_ptr = emscripten_memory_pointer!(ctx.memory(0), path) as *const i8;
let result = unsafe { libc::lchown(path_ptr, uid, gid) };
debug!(
"=> path: {}, uid: {}, gid: {}, result: {}",
unsafe { std::ffi::CStr::from_ptr(path_ptr).to_str().unwrap() },
uid,
gid,
result,
);
result
}
/// getgid
pub fn ___syscall200(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall200 (getgid)");
unsafe { libc::getgid() as i32 }
}
/// getgid
pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall201 (getgid)");
let result = unsafe {
// Maybe fix: Emscripten returns 0 always
libc::getgid() as i32
};
result
}
/// getgid32
pub fn ___syscall202(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
// gid_t
debug!("emscripten::___syscall202 (getgid32)");
unsafe {
// Maybe fix: Emscripten returns 0 always
libc::getgid() as _
}
}
/// fchown
pub fn ___syscall207(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall207 (fchown) {}", _which);
let fd: c_int = varargs.get(ctx);
let owner: libc::uid_t = varargs.get(ctx);
let group: libc::gid_t = varargs.get(ctx);
unsafe { libc::fchown(fd, owner, group) }
}
/// getgroups
pub fn ___syscall205(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall205 (getgroups) {}", _which);
let ngroups_max: c_int = varargs.get(ctx);
let groups: c_int = varargs.get(ctx);
#[allow(clippy::cast_ptr_alignment)]
let gid_ptr = emscripten_memory_pointer!(ctx.memory(0), groups) as *mut libc::gid_t;
assert_eq!(4, std::mem::align_of_val(&gid_ptr));
let result = unsafe { libc::getgroups(ngroups_max, gid_ptr) };
debug!(
"=> ngroups_max: {}, gid_ptr: {:?}, result: {}",
ngroups_max, gid_ptr, result,
);
result
}
/// chown
pub fn ___syscall212(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall212 (chown) {}", _which);
let pathname: u32 = varargs.get(ctx);
let owner: u32 = varargs.get(ctx);
let group: u32 = varargs.get(ctx);
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
unsafe { libc::chown(pathname_addr, owner, group) }
}
/// madvise
pub fn ___syscall219(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall212 (madvise) {}", _which);
let addr_ptr: c_int = varargs.get(ctx);
let len: usize = varargs.get(ctx);
let advice: c_int = varargs.get(ctx);
let addr = emscripten_memory_pointer!(ctx.memory(0), addr_ptr) as *mut libc::c_void;
unsafe { madvise(addr, len, advice) }
}
/// fallocate
pub fn ___syscall324(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall324 (fallocate) {}", _which);
let _fd: c_int = varargs.get(ctx);
let _mode: c_int = varargs.get(ctx);
let _offset: libc::off_t = varargs.get(ctx);
let _len: libc::off_t = varargs.get(ctx);
#[cfg(not(target_os = "macos"))]
unsafe {
fallocate(_fd, _mode, _offset, _len)
}
#[cfg(target_os = "macos")]
{
unimplemented!()
}
}

95
lib/emscripten/src/syscalls/unix/select.rs
View File

@ -1,95 +0,0 @@
use crate::syscalls::emscripten_vfs::EmscriptenVfs;
use crate::varargs::VarArgs;
use crate::EmscriptenData;
use wasmer_runtime_core::memory::Memory;
use wasmer_runtime_core::vm::Ctx;
#[inline]
pub fn emscripten_memory_ptr(memory: &Memory, offset: u32) -> *mut u8 {
use std::cell::Cell;
(&memory.view::<u8>()[(offset as usize)..]).as_ptr() as *mut Cell<u8> as *mut u8
}
fn translate_to_host_file_descriptors(
vfs: &EmscriptenVfs,
set_ptr: *mut libc::fd_set,
nfds: i32,
) -> Option<(i32, Vec<i32>)> {
let pairs = (0..nfds)
.map(|vfd| {
let host_fd = vfs.get_host_socket_fd(vfd).unwrap_or(-1);
(vfd, host_fd)
})
.filter(|(_, host_fd)| *host_fd >= 0)
.filter(|(vfd, _)| unsafe { libc::FD_ISSET(*vfd, set_ptr) })
.collect::<Vec<_>>();
let max = pairs
.iter()
.map(|(_, host_fd)| *host_fd)
.max()
.unwrap_or(-1)
+ 1;
let mut internal_handles = vec![0; max as usize];
unsafe { libc::FD_ZERO(set_ptr) };
for (vfd, host_fd) in pairs.iter() {
let index = *host_fd as usize;
if internal_handles.get(index).is_none() {
// index is out of range and we are in a bad state...push back up and let the application handle failure
return None;
}
internal_handles[*host_fd as usize] = *vfd;
unsafe {
libc::FD_SET(*host_fd, set_ptr);
};
}
Some((max, internal_handles))
}
fn translate_to_virtual_file_descriptors(set_ptr: *mut libc::fd_set, internal_handles: Vec<i32>) {
let virtual_fds = internal_handles
.iter()
.enumerate()
.filter(|(host_fd, _)| unsafe { libc::FD_ISSET(*host_fd as i32, set_ptr) })
.map(|(_, vfd)| *vfd)
.collect::<Vec<_>>();
unsafe { libc::FD_ZERO(set_ptr) };
virtual_fds
.iter()
.for_each(|vfd| unsafe { libc::FD_SET(*vfd, set_ptr) });
}
/// select
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall142(ctx: &mut Ctx, _: libc::c_int, mut varargs: VarArgs) -> libc::c_int {
debug!("emscripten::___syscall142 (select)");
let nfds: i32 = varargs.get(ctx);
let readfds: u32 = varargs.get(ctx);
let writefds: u32 = varargs.get(ctx);
let _exceptfds: u32 = varargs.get(ctx);
let _timeout: i32 = varargs.get(ctx);
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
let emscripten_memory = ctx.memory(0);
let read_set_ptr = emscripten_memory_ptr(emscripten_memory, readfds) as _;
let write_set_ptr = emscripten_memory_ptr(emscripten_memory, writefds) as _;
let vfs = unsafe { (*(ctx.data as *const EmscriptenData)).vfs.as_ref().unwrap() };
// read descriptors and write descriptors, if any didn't work, then fail
let (read_host_nfds, read_lookup, write_host_nfds, write_lookup) = match (
translate_to_host_file_descriptors(vfs, read_set_ptr, nfds),
translate_to_host_file_descriptors(vfs, write_set_ptr, nfds),
) {
(None, _) => return -1,
(_, None) => return -1,
(Some((read_host_nfds, read_lookup)), Some((write_host_nfds, write_lookup))) => {
(read_host_nfds, read_lookup, write_host_nfds, write_lookup)
}
};
let host_nfds = std::cmp::max(read_host_nfds, write_host_nfds);
// TODO: timeout and except fds set
let result = unsafe { libc::select(host_nfds, read_set_ptr, write_set_ptr, 0 as _, 0 as _) };
translate_to_virtual_file_descriptors(read_set_ptr, read_lookup);
translate_to_virtual_file_descriptors(write_set_ptr, write_lookup);
result
}

677
lib/emscripten/src/syscalls/unix/vfs.rs
View File

@ -1,677 +0,0 @@
use crate::syscalls::emscripten_vfs::FileHandle;
use crate::utils::{copy_stat_into_wasm, read_string_from_wasm};
use crate::varargs::VarArgs;
use libc::stat;
use std::cell::RefCell;
use std::ffi::c_void;
use std::os::raw::c_int;
use std::slice;
use wasmer_runtime_core::memory::Memory;
use wasmer_runtime_core::vm::Ctx;
#[inline]
pub fn emscripten_memory_ptr(memory: &Memory, offset: u32) -> *mut u8 {
use std::cell::Cell;
(&memory.view::<u8>()[(offset as usize)..]).as_ptr() as *mut Cell<u8> as *mut u8
}
/// read
pub fn ___syscall3(ctx: &mut Ctx, _: i32, mut varargs: VarArgs) -> i32 {
debug!("emscripten::___syscall3 (read - vfs)",);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_ptr(ctx.memory(0), buf) as *mut u8;
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let ret = vfs.read_file(fd, buf_slice);
debug!("=> read syscall returns: {}", ret);
ret as _
}
/// write
pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall4 (write - vfs) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
let buf_addr = emscripten_memory_ptr(ctx.memory(0), buf);
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
match vfs.write_file(fd, buf_slice, count as usize) {
Ok(count) => count as _,
Err(_) => -1,
}
}
/// open
pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall5 (open vfs) {}", _which);
let pathname: u32 = varargs.get(ctx);
let pathname_addr = emscripten_memory_ptr(ctx.memory(0), pathname) as *const i8;
let path_str = unsafe { std::ffi::CStr::from_ptr(pathname_addr).to_str().unwrap() };
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let fd = vfs.open_file(path_str);
fd
}
/// close
pub fn ___syscall6(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall6 (close vfs) {}", _which);
let fd: i32 = varargs.get(ctx);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let close_result = vfs.close_file_descriptor(fd);
close_result
}
/// chmod
pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall15 (chmod)");
debug!("chmod always returns 0.");
0
}
/// mkdir
pub fn ___syscall39(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall39 (mkdir vfs) {}", _which);
let pathname: u32 = varargs.get(ctx);
let _mode: u32 = varargs.get(ctx);
let path = read_string_from_wasm(ctx.memory(0), pathname);
let root = std::path::PathBuf::from("/");
let absolute_path = root.join(&path);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
vfs.make_dir(&absolute_path);
0
}
/// pipe
pub fn ___syscall42(_ctx: &mut Ctx, _which: c_int, mut _varargs: VarArgs) -> c_int {
unimplemented!("emscripten::___syscall42 (pipe)");
}
/// ioctl
pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall54 (ioctl) {}", _which);
let fd: i32 = varargs.get(ctx);
let request: u32 = varargs.get(ctx);
debug!("virtual fd: {}, op: {}", fd, request);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_fd = match vfs.get_host_socket_fd(fd) {
Some(host_fd) => host_fd,
_ => return -1,
};
// Got the equivalents here: https://code.woboq.org/linux/linux/include/uapi/asm-generic/ioctls.h.html
match request as _ {
21537 => {
// FIONBIO
let argp: u32 = varargs.get(ctx);
let argp_ptr = emscripten_memory_ptr(ctx.memory(0), argp) as *mut c_void;
let ret = unsafe { libc::ioctl(host_fd, libc::FIONBIO, argp_ptr) };
debug!("ret(FIONBIO): {}", ret);
ret
// 0
}
21523 => {
// TIOCGWINSZ
let argp: u32 = varargs.get(ctx);
let argp_ptr = emscripten_memory_ptr(ctx.memory(0), argp) as *mut c_void;
let ret = unsafe { libc::ioctl(host_fd, libc::TIOCGWINSZ, argp_ptr) };
debug!("ret(TIOCGWINSZ): {} (harcoded to 0)", ret);
// ret
// TODO: We hardcode the value to have emscripten tests pass, as for some reason
// when the capturer is active, ioctl returns -1 instead of 0
if ret == -1 {
0
} else {
ret
}
}
_ => {
debug!(
"emscripten::___syscall54 -> non implemented case {}",
request
);
0
}
}
}
/// dup2
pub fn ___syscall63(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall63 (dup2) {}", _which);
let src: i32 = varargs.get(ctx);
let dst: i32 = varargs.get(ctx);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
// if the src is a valid file descriptor, then continue
if !vfs.fd_map.contains_key(&src) {
return -1;
}
// if src and dst are identical, do nothing
if src == dst {
return 0;
}
let _ = vfs.fd_map.remove(&dst);
let dst_file_handle = match vfs.fd_map.get(&src) {
Some(FileHandle::Vf(file)) => FileHandle::Vf(file.clone()),
Some(FileHandle::Socket(src_host_fd)) => {
// get a dst file descriptor, or just use the underlying dup syscall
match unsafe { libc::dup(*src_host_fd) } {
-1 => return -1,
dst_host_fd => FileHandle::Socket(dst_host_fd),
}
}
None => return -1,
};
vfs.fd_map.insert(dst, dst_file_handle);
debug!("emscripten::___syscall63 (dup2) returns {}", dst);
dst
}
// socketcall
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall102 (socketcall) {}", _which);
let call: u32 = varargs.get(ctx);
let mut socket_varargs: VarArgs = varargs.get(ctx);
#[repr(C)]
pub struct GuestSockaddrIn {
pub sin_family: libc::sa_family_t, // u16
pub sin_port: libc::in_port_t, // u16
pub sin_addr: GuestInAddr, // u32
pub sin_zero: [u8; 8], // u8 * 8
// 2 + 2 + 4 + 8 = 16
}
#[repr(C)]
pub struct GuestInAddr {
pub s_addr: libc::in_addr_t, // u32
}
pub struct LinuxSockAddr {
pub sa_family: u16,
pub sa_data: [libc::c_char; 14],
}
match call {
1 => {
debug!("socket: socket");
// Another conditional constant for name resolution: Macos et iOS use
// SO_NOSIGPIPE as a setsockopt flag to disable SIGPIPE emission on socket.
// Other platforms do otherwise.
#[cfg(target_os = "darwin")]
use libc::SO_NOSIGPIPE;
#[cfg(not(target_os = "darwin"))]
const SO_NOSIGPIPE: c_int = 0;
// socket (domain: c_int, ty: c_int, protocol: c_int) -> c_int
let domain: i32 = socket_varargs.get(ctx);
let ty: i32 = socket_varargs.get(ctx);
let protocol: i32 = socket_varargs.get(ctx);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let _test_errno = errno::errno();
// create the host socket
let host_fd = unsafe { libc::socket(domain, ty, protocol) };
let vfd = vfs.new_socket_fd(host_fd);
// set_cloexec
let _ioctl_result = unsafe { libc::ioctl(host_fd, libc::FIOCLEX) };
let _err = errno::errno();
let _result = unsafe {
libc::setsockopt(host_fd, libc::SOL_SOCKET, SO_NOSIGPIPE, 0 as *const _, 4)
};
let _err2 = errno::errno();
debug!(
"=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}",
domain, ty, protocol, vfd
);
vfd
}
2 => {
debug!("socket: bind");
// bind (socket: c_int, address: *const sockaddr, address_len: socklen_t) -> c_int
// TODO: Emscripten has a different signature.
let socket: i32 = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len = socket_varargs.get(ctx);
let address = emscripten_memory_ptr(ctx.memory(0), address) as *mut libc::sockaddr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
// Debug received address
let _proper_address = address as *const GuestSockaddrIn;
let _other_proper_address = address as *const libc::sockaddr;
debug!(
"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
unsafe { (*_proper_address).sin_family }, unsafe { (*_proper_address).sin_port }, unsafe { (*_proper_address).sin_addr.s_addr }
);
let status = unsafe { libc::bind(host_socket_fd as _, address, address_len) };
// debug!("=> status: {}", status);
debug!(
"=> socketfd: {}, address: {:?}, address_len: {} = status: {}",
socket, address, address_len, status
);
status
// -1
}
3 => {
debug!("socket: connect");
// connect (socket: c_int, address: *const sockaddr, len: socklen_t) -> c_int
// TODO: Emscripten has a different signature.
let socket: i32 = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len = socket_varargs.get(ctx);
let address = emscripten_memory_ptr(ctx.memory(0), address) as *mut libc::sockaddr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
unsafe { libc::connect(host_socket_fd as _, address, address_len) }
}
4 => {
debug!("socket: listen");
// listen (socket: c_int, backlog: c_int) -> c_int
let socket: i32 = socket_varargs.get(ctx);
let backlog: i32 = socket_varargs.get(ctx);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
let status = unsafe { libc::listen(host_socket_fd, backlog) };
debug!(
"=> socketfd: {}, backlog: {} = status: {}",
socket, backlog, status
);
status
}
5 => {
debug!("socket: accept");
let socket: i32 = socket_varargs.get(ctx);
let address_addr: u32 = socket_varargs.get(ctx);
let address_len: u32 = socket_varargs.get(ctx);
let address = emscripten_memory_ptr(ctx.memory(0), address_addr) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_ptr(ctx.memory(0), address_len) as *mut libc::socklen_t;
let host_socket_fd = {
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
host_socket_fd
};
debug!(
"=> socket: {}(host {}), address: {:?}, address_len: {}",
socket, host_socket_fd, address, address_len
);
let new_accept_host_fd =
unsafe { libc::accept(host_socket_fd, address, address_len_addr) };
if new_accept_host_fd < 0 {
panic!("accept file descriptor should not be negative.");
}
unsafe {
let address_linux =
emscripten_memory_ptr(ctx.memory(0), address_addr) as *mut LinuxSockAddr;
(*address_linux).sa_family = (*address).sa_family as u16;
(*address_linux).sa_data = (*address).sa_data;
};
// set_cloexec
let _ioctl_result = unsafe { libc::ioctl(new_accept_host_fd, libc::FIOCLEX) };
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let new_vfd = vfs.new_socket_fd(new_accept_host_fd);
debug!("new accept fd: {}(host {})", new_vfd, new_accept_host_fd);
new_vfd
}
6 => {
debug!("socket: getsockname");
// getsockname (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
let socket: i32 = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len: u32 = socket_varargs.get(ctx);
let address = emscripten_memory_ptr(ctx.memory(0), address) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_ptr(ctx.memory(0), address_len) as *mut libc::socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
unsafe { libc::getsockname(host_socket_fd as _, address, address_len_addr) }
}
7 => {
debug!("socket: getpeername");
// getpeername (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
let socket: i32 = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len: u32 = socket_varargs.get(ctx);
let address = emscripten_memory_ptr(ctx.memory(0), address) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_ptr(ctx.memory(0), address_len) as *mut libc::socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
unsafe { libc::getpeername(host_socket_fd as _, address, address_len_addr) }
}
11 => {
debug!("socket: sendto");
// sendto (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
let socket: i32 = socket_varargs.get(ctx);
let buf: u32 = socket_varargs.get(ctx);
let flags = socket_varargs.get(ctx);
let len: i32 = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len = socket_varargs.get(ctx);
let buf_addr = emscripten_memory_ptr(ctx.memory(0), buf) as _;
let address = emscripten_memory_ptr(ctx.memory(0), address) as *mut libc::sockaddr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
unsafe {
libc::sendto(
host_socket_fd as _,
buf_addr,
flags,
len,
address,
address_len,
) as i32
}
}
12 => {
debug!("socket: recvfrom");
// recvfrom (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
let socket: i32 = socket_varargs.get(ctx);
let buf: u32 = socket_varargs.get(ctx);
let flags = socket_varargs.get(ctx);
let len: i32 = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len: u32 = socket_varargs.get(ctx);
let buf_addr = emscripten_memory_ptr(ctx.memory(0), buf) as _;
let address = emscripten_memory_ptr(ctx.memory(0), address) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_ptr(ctx.memory(0), address_len) as *mut libc::socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
let recv_result = unsafe {
libc::recvfrom(
host_socket_fd,
buf_addr,
flags,
len,
address,
address_len_addr,
) as i32
};
debug!(
"recvfrom: socket: {}, flags: {}, len: {}, result: {}",
socket, flags, len, recv_result
);
recv_result
}
14 => {
debug!("socket: setsockopt");
// NOTE: Emscripten seems to be passing the wrong values to this syscall
// level: Em passes 1 as SOL_SOCKET; SOL_SOCKET is 0xffff in BSD
// name: Em passes SO_ACCEPTCONN, but Nginx complains about REUSEADDR
// https://github.com/openbsd/src/blob/master/sys/sys/socket.h#L156
// setsockopt (socket: c_int, level: c_int, name: c_int, value: *const c_void, option_len: socklen_t) -> c_int
let socket = socket_varargs.get(ctx);
// SOL_SOCKET = 0xffff (BSD, Linux)
let level: i32 = libc::SOL_SOCKET;
let _: u32 = socket_varargs.get(ctx);
// SO_REUSEADDR = 0x4 (BSD, Linux)
let name: i32 = libc::SO_REUSEADDR;
let _: u32 = socket_varargs.get(ctx);
let value: u32 = socket_varargs.get(ctx);
let option_len = socket_varargs.get(ctx);
let value_addr = emscripten_memory_ptr(ctx.memory(0), value) as _; // Endian problem
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
let ret = unsafe {
libc::setsockopt(host_socket_fd as _, level, name, value_addr, option_len)
};
debug!("=> socketfd: {}, level: {} (SOL_SOCKET/0xffff), name: {} (SO_REUSEADDR/4), value_addr: {:?}, option_len: {} = status: {}", socket, level, name, value_addr, option_len, ret);
ret
}
15 => {
debug!("socket: getsockopt");
// getsockopt (sockfd: c_int, level: c_int, optname: c_int, optval: *mut c_void, optlen: *mut socklen_t) -> c_int
use libc::socklen_t;
let socket = socket_varargs.get(ctx);
let level: i32 = socket_varargs.get(ctx);
let correct_level = if level == 1 { libc::SOL_SOCKET } else { level };
let name: i32 = socket_varargs.get(ctx);
let correct_name = if name == 3 { libc::SO_TYPE } else { name };
let value: u32 = socket_varargs.get(ctx);
let option_len: u32 = socket_varargs.get(ctx);
let value_addr = emscripten_memory_ptr(ctx.memory(0), value) as _;
let option_len_addr =
emscripten_memory_ptr(ctx.memory(0), option_len) as *mut socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = match vfs.get_host_socket_fd(socket) {
Some(host_fd) => host_fd,
None => {
return -1;
}
};
let result = unsafe {
libc::getsockopt(
host_socket_fd,
correct_level,
correct_name,
value_addr,
option_len_addr,
)
};
result
}
16 => {
debug!("socket: sendmsg");
// sendmsg (fd: c_int, msg: *const msghdr, flags: c_int) -> ssize_t
let socket: i32 = socket_varargs.get(ctx);
let msg: u32 = socket_varargs.get(ctx);
let flags: i32 = socket_varargs.get(ctx);
let msg_addr = emscripten_memory_ptr(ctx.memory(0), msg) as *const libc::msghdr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
unsafe { libc::sendmsg(host_socket_fd as _, msg_addr, flags) as i32 }
}
17 => {
debug!("socket: recvmsg");
// recvmsg (fd: c_int, msg: *mut msghdr, flags: c_int) -> ssize_t
let socket: i32 = socket_varargs.get(ctx);
let msg: u32 = socket_varargs.get(ctx);
let flags: i32 = socket_varargs.get(ctx);
let msg_addr = emscripten_memory_ptr(ctx.memory(0), msg) as *mut libc::msghdr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let host_socket_fd = vfs.get_host_socket_fd(socket).unwrap();
unsafe { libc::recvmsg(host_socket_fd as _, msg_addr, flags) as i32 }
}
_ => {
// others
-1
}
}
}
/// writev
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall146(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// -> ssize_t
debug!("emscripten::___syscall146 (writev) {}", _which);
let fd: i32 = varargs.get(ctx);
let iov_array_offset: i32 = varargs.get(ctx);
let iovcnt: i32 = varargs.get(ctx);
#[repr(C)]
struct GuestIovec {
iov_base: i32,
iov_len: i32,
}
let mut err = false;
let iov_array_offset = iov_array_offset as u32;
let count = (0..iovcnt as u32).fold(0, |acc, iov_array_index| {
let iov_offset = iov_array_offset + iov_array_index * 8; // get the offset to the iov
let (iov_buf_slice, iov_buf_ptr, count) = {
let emscripten_memory = ctx.memory(0);
let guest_iov_ptr =
emscripten_memory_ptr(emscripten_memory, iov_offset) as *mut GuestIovec;
let iov_base_offset = unsafe { (*guest_iov_ptr).iov_base as u32 };
let iov_buf_ptr =
emscripten_memory_ptr(emscripten_memory, iov_base_offset) as *const c_void;
let iov_len = unsafe { (*guest_iov_ptr).iov_len as usize };
let iov_buf_slice = unsafe { slice::from_raw_parts(iov_buf_ptr as *const u8, iov_len) };
(iov_buf_slice, iov_buf_ptr, iov_len)
};
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let count: usize = match vfs.fd_map.get(&fd) {
Some(FileHandle::Vf(file)) => {
match RefCell::borrow_mut(file).write_file(iov_buf_slice, 0) {
Ok(count) => count,
_ => {
err = true;
0
}
}
}
Some(FileHandle::Socket(host_fd)) => unsafe {
let count = libc::write(*host_fd, iov_buf_ptr, count);
count as usize
},
None => {
err = true;
0
}
};
acc + count
});
if err {
return -1;
}
debug!(
"=> fd: {}, iov: {}, iovcnt = {}, returning {}",
fd, iov_array_offset, iovcnt, count
);
count as _
}
/// pread
pub fn ___syscall180(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall180 (pread) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
let offset: i32/*i64*/ = varargs.get(ctx);
let buf_addr = emscripten_memory_ptr(ctx.memory(0), buf) as *mut u8;
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
let mut buf_slice_with_offset: &mut [u8] = &mut buf_slice[(offset as usize)..];
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_ref().unwrap(); //.as_mut().unwrap();
let ret = vfs.read_file(fd, &mut buf_slice_with_offset);
debug!("read: '{}'", read_string_from_wasm(ctx.memory(0), buf));
ret as _
}
/// pwrite
pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall181 (pwrite) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: u32 = varargs.get(ctx);
let _offset: i32 = varargs.get(ctx);
let buf_addr = emscripten_memory_ptr(ctx.memory(0), buf);
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
match vfs.write_file(fd, buf_slice, count as _) {
Ok(count) => count as _,
Err(e) => {
eprintln!("{:?}", e);
-1
}
}
}
// stat64
pub fn ___syscall195(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall195 (stat64) {}", _which);
let pathname: u32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let path_string = read_string_from_wasm(ctx.memory(0), pathname);
debug!("path extract for `stat` syscall: {}", &path_string);
let path = std::path::PathBuf::from(path_string);
let emscripten_data = crate::env::get_emscripten_data(ctx);
let ret = match &mut emscripten_data.vfs {
Some(vfs) => {
let metadata = vfs.path_metadata(&path).unwrap();
let len = metadata.len;
unsafe {
let mut stat: stat = std::mem::zeroed();
stat.st_size = len as _;
debug!("stat size: {}", len);
copy_stat_into_wasm(ctx, buf, &stat as _);
}
0
}
None => -1,
};
debug!("stat return: {}", ret);
ret
}
/// fstat64
pub fn ___syscall197(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall197 (fstat64) {}", _which);
let fd: c_int = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let ret = match vfs.fd_map.get(&fd) {
Some(FileHandle::Vf(file)) => {
let metadata = file.borrow_mut().metadata().unwrap();
// let metadata = vfs.vfs.get_file_metadata(internal_handle).unwrap();
let len = metadata.len;
let mode = if metadata.is_file {
libc::S_IFREG
} else {
libc::S_IFDIR
};
unsafe {
let mut stat: stat = std::mem::zeroed();
stat.st_mode = mode as _;
stat.st_size = len as _;
debug!("fstat size: {}", len);
copy_stat_into_wasm(ctx, buf, &stat as _);
}
0
}
Some(FileHandle::Socket(_host_fd)) => panic!(),
None => -1,
};
debug!("fstat return: {}", ret);
ret
}
/// dup3
pub fn ___syscall330(_ctx: &mut Ctx, _which: c_int, mut _varargs: VarArgs) -> libc::pid_t {
unimplemented!();
}

117
lib/emscripten/src/syscalls/windows.rs
View File

@ -13,31 +13,6 @@ use wasmer_runtime_core::vm::Ctx;
#[allow(non_camel_case_types)]
type pid_t = c_int;
/// read
pub fn ___syscall3(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
debug!("emscripten::___syscall3 (read) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut libc::c_void;
let ret = unsafe { libc::read(fd, buf_addr, count as _) };
debug!("=> ret: {}", ret);
ret as _
}
/// write
pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall4 (write) {}", _which);
let fd: i32 = varargs.get(ctx);
let buf: u32 = varargs.get(ctx);
let count: i32 = varargs.get(ctx);
debug!("=> fd: {}, buf: {}, count: {}", fd, buf, count);
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *const libc::c_void;
let ret = unsafe { libc::write(fd, buf_addr, count as _) as i32 };
ret
}
/// open
pub fn ___syscall5(ctx: &mut Ctx, which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall5 (open) {}", which);
@ -83,72 +58,12 @@ pub fn ___syscall5(ctx: &mut Ctx, which: c_int, mut varargs: VarArgs) -> c_int {
}
}
/// close
pub fn ___syscall6(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall6 (close) {}", _which);
let fd: i32 = varargs.get(ctx);
debug!("fd: {}", fd);
unsafe { libc::close(fd) }
}
/// link
pub fn ___syscall9(_ctx: &mut Ctx, _which: c_int, _varargs: VarArgs) -> c_int {
pub fn ___syscall9(_ctx: &mut Ctx, _which: c_int, mut _varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall9 (link) {}", _which);
unimplemented!()
}
/// chmod
pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall15");
-1
}
/// dup2
pub fn ___syscall63(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall63 (dup2) {}", _which);
let src: i32 = varargs.get(ctx);
let dst: i32 = varargs.get(ctx);
unsafe { libc::dup2(src, dst) }
}
// writev
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall146(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// -> ssize_t
debug!("emscripten::___syscall146 (writev) {}", _which);
let fd: i32 = varargs.get(ctx);
let iov: i32 = varargs.get(ctx);
let iovcnt: i32 = varargs.get(ctx);
#[repr(C)]
struct GuestIovec {
iov_base: i32,
iov_len: i32,
}
debug!("=> fd: {}, iov: {}, iovcnt = {}", fd, iov, iovcnt);
let mut ret = 0;
unsafe {
for i in 0..iovcnt {
let guest_iov_addr =
emscripten_memory_pointer!(ctx.memory(0), (iov + i * 8)) as *mut GuestIovec;
let iov_base = emscripten_memory_pointer!(ctx.memory(0), (*guest_iov_addr).iov_base)
as *const libc::c_void;
let iov_len = (*guest_iov_addr).iov_len as _;
// debug!("=> iov_addr: {:?}, {:?}", iov_base, iov_len);
let curr = libc::write(fd, iov_base, iov_len);
if curr < 0 {
return -1;
}
ret += curr;
}
// debug!(" => ret: {}", ret);
ret as _
}
}
/// ftruncate64
pub fn ___syscall194(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall194 - stub");
@ -164,13 +79,13 @@ pub fn ___syscall212(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_i
}
/// access
pub fn ___syscall33(_ctx: &mut Ctx, _which: c_int, _varargs: VarArgs) -> c_int {
pub fn ___syscall33(_ctx: &mut Ctx, _which: c_int, mut _varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall33 (access) {}", _which);
unimplemented!()
}
/// nice
pub fn ___syscall34(_ctx: &mut Ctx, _which: c_int, _varargs: VarArgs) -> c_int {
pub fn ___syscall34(_ctx: &mut Ctx, _which: c_int, mut _varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall34 (nice) {}", _which);
unimplemented!()
}
@ -246,32 +161,6 @@ pub fn ___syscall330(_ctx: &mut Ctx, _which: c_int, mut _varargs: VarArgs) -> pi
-1
}
/// pipe
pub fn ___syscall42(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall42 (pipe)");
// offset to a file descriptor, which contains a read end and write end, 2 integers
let fd_offset: u32 = varargs.get(ctx);
let emscripten_memory = ctx.memory(0);
// convert the file descriptor into a vec with two slots
let mut fd_vec: Vec<c_int> = emscripten_memory.view()[((fd_offset / 4) as usize)..]
.iter()
.map(|pipe_end: &std::cell::Cell<c_int>| pipe_end.get())
.take(2)
.collect();
// get it as a mutable pointer
let fd_ptr = fd_vec.as_mut_ptr();
// call pipe and store the pointers in this array
#[cfg(target_os = "windows")]
let result: c_int = unsafe { libc::pipe(fd_ptr, 2048, 0) };
#[cfg(not(target_os = "windows"))]
let result: c_int = unsafe { libc::pipe(fd_ptr) };
result
}
/// ioctl
pub fn ___syscall54(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall54 (ioctl) {}", which);

24
lib/emscripten/src/utils.rs
View File

@ -90,6 +90,24 @@ pub unsafe fn allocate_cstr_on_stack<'a>(ctx: &'a mut Ctx, s: &str) -> (u32, &'a
(offset, slice)
}
#[cfg(not(target_os = "windows"))]
pub unsafe fn copy_terminated_array_of_cstrs(_ctx: &mut Ctx, cstrs: *mut *mut c_char) -> u32 {
let _total_num = {
let mut ptr = cstrs;
let mut counter = 0;
while !(*ptr).is_null() {
counter += 1;
ptr = ptr.add(1);
}
counter
};
debug!(
"emscripten::copy_terminated_array_of_cstrs::total_num: {}",
_total_num
);
0
}
#[repr(C)]
pub struct GuestStat {
st_dev: u32,
@ -175,7 +193,11 @@ mod tests {
}
#[cfg(not(any(feature = "llvm", feature = "clif", feature = "dynasm")))]
compile_error!("compiler not specified, activate a compiler via features");
fn get_compiler() -> impl Compiler {
panic!("compiler not specified, activate a compiler via features");
use wasmer_clif_backend::CraneliftCompiler;
CraneliftCompiler::new()
}
#[test]
fn should_detect_emscripten_files() {

25
lib/emscripten/tests/emtests/_common.rs
View File

@ -68,31 +68,10 @@ macro_rules! assert_emscripten_output {
}
pub fn assert_emscripten_output(wasm_bytes: &[u8], raw_expected_str: &str) {
use wasmer_clif_backend::CraneliftCompiler;
use wasmer_emscripten::{generate_emscripten_env, stdio::StdioCapturer, EmscriptenGlobals};
use wasmer_runtime_core::backend::Compiler;
#[cfg(feature = "clif")]
fn get_compiler() -> impl Compiler {
use wasmer_clif_backend::CraneliftCompiler;
CraneliftCompiler::new()
}
#[cfg(feature = "llvm")]
fn get_compiler() -> impl Compiler {
use wasmer_llvm_backend::LLVMCompiler;
LLVMCompiler::new()
}
#[cfg(not(any(feature = "llvm", feature = "clif")))]
fn get_compiler() -> impl Compiler {
panic!("compiler not specified, activate a compiler via features");
use wasmer_clif_backend::CraneliftCompiler;
CraneliftCompiler::new()
}
let compiler = get_compiler();
let module = wasmer_runtime_core::compile_with(&wasm_bytes[..], &compiler)
let module = wasmer_runtime_core::compile_with(&wasm_bytes[..], &CraneliftCompiler::new())
.expect("WASM can't be compiled");
let mut emscripten_globals = EmscriptenGlobals::new(&module);

2
lib/emscripten/tests/emtests/mod.rs
View File

@ -176,8 +176,6 @@ mod test_unary_literal;
mod test_utf;
mod test_varargs;
mod test_varargs_multi;
#[cfg(all(feature = "vfs", not(target_os = "windows")))]
mod test_vfs;
mod test_vprintf;
mod test_vsnprintf;
mod test_wprintf;