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wip enchanced vfs

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This commit is contained in:
Mackenzie Clark
2019-03-21 08:55:23 -07:00
parent edacb0a8a7
commit 9ed593d7b6
19 changed files with 1805 additions and 148 deletions
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14
lib/emscripten/Cargo.toml
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@ -10,12 +10,17 @@ build = "build/mod.rs"
[dependencies]
wasmer-runtime-core = { path = "../runtime-core", version = "0.2.1" }
wasmer-clif-backend = { path = "../clif-backend", version = "0.2.0" }
wasmer-runtime-abi = { path = "../runtime-abi", optional = true }
lazy_static = "1.2.0"
libc = "0.2.49"
byteorder = "1"
time = "0.1.41"
errno = "0.2.4"
bit_field = "0.9.0"
[target.'cfg(not(windows))'.dependencies]
wasmer-clif-backend = { path = "../clif-backend", version = "0.2.0", optional = true }
wasmer-llvm-backend = { path = "../llvm-backend", version = "0.1.0", optional = true }
[target.'cfg(windows)'.dependencies]
rand = "0.6"
@ -23,13 +28,10 @@ rand = "0.6"
[dev-dependencies]
wabt = "0.7.2"
[target.'cfg(not(windows))'.dev-dependencies]
wasmer-llvm-backend = { path = "../llvm-backend", version = "0.1.0" }
[build-dependencies]
glob = "0.2.11"
[features]
clif = []
llvm = []
clif = ["wasmer-clif-backend"]
llvm = ["wasmer-llvm-backend"]
vfs = ["wasmer-runtime-abi"]

27
lib/emscripten/src/env/mod.rs vendored
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@ -75,3 +75,30 @@ pub fn ___assert_fail(_ctx: &mut Ctx, _a: c_int, _b: c_int, _c: c_int, _d: c_int
// TODO: Implement like emscripten expects regarding memory/page size
// TODO raise an error
}
#[cfg(feature = "vfs")]
#[allow(clippy::cast_ptr_alignment)]
pub fn _getgrnam(ctx: &mut Ctx, name_ptr: c_int) -> c_int {
debug!("emscripten::_getgrnam {}", name_ptr);
#[cfg(not(feature = "debug"))]
let _ = name_ptr;
#[repr(C)]
struct GuestGroup {
gr_name: u32,
gr_passwd: u32,
gr_gid: u32,
gr_mem: u32,
}
unsafe {
let group_struct_offset = call_malloc(ctx, std::mem::size_of::<GuestGroup>() as _);
let group_struct_ptr =
emscripten_memory_pointer!(ctx.memory(0), group_struct_offset) as *mut GuestGroup;
(*group_struct_ptr).gr_name = 0;
(*group_struct_ptr).gr_passwd = 0;
(*group_struct_ptr).gr_gid = 0;
(*group_struct_ptr).gr_mem = 0;
group_struct_offset as c_int
}
}

32
lib/emscripten/src/env/unix/mod.rs vendored
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@ -1,14 +1,11 @@
/// NOTE: These syscalls only support wasm_32 for now because they take u32 offset
use libc::{
c_int, getenv, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam, putenv, setenv, sysconf,
unsetenv,
};
use libc::{c_int, getenv, 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, copy_terminated_array_of_cstrs};
use crate::utils::copy_cstr_into_wasm;
use wasmer_runtime_core::vm::Ctx;
// #[no_mangle]
@ -103,6 +100,7 @@ pub fn _getpwnam(ctx: &mut Ctx, name_ptr: c_int) -> c_int {
}
}
#[cfg(not(feature = "vfs"))]
#[allow(clippy::cast_ptr_alignment)]
pub fn _getgrnam(ctx: &mut Ctx, name_ptr: c_int) -> c_int {
debug!("emscripten::_getgrnam {}", name_ptr);
@ -121,7 +119,7 @@ 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 =
@ -140,3 +138,25 @@ 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
}
pub fn _initgroups(_ctx: &mut Ctx, user_offset: u32, gid: u32) -> c_int {
0
}
#[cfg(not(feature = "vfs"))]
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
}

1
lib/emscripten/src/env/windows/mod.rs vendored
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@ -97,6 +97,7 @@ pub fn _getpwnam(ctx: &mut Ctx, name_ptr: c_int) -> c_int {
}
}
#[cfg(not(feature = "vfs"))]
#[allow(clippy::cast_ptr_alignment)]
pub fn _getgrnam(ctx: &mut Ctx, name_ptr: c_int) -> c_int {
debug!("emscripten::_getgrnam {}", name_ptr);

13
lib/emscripten/src/lib.rs
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@ -54,6 +54,9 @@ pub use self::utils::{
get_emscripten_table_size, is_emscripten_module,
};
#[cfg(feature = "vfs")]
use crate::syscalls::EmscriptenVfs;
#[cfg(feature = "vfs")]
use wasmer_runtime_abi::vfs::vfs::Vfs;
@ -122,7 +125,7 @@ pub struct EmscriptenData<'a> {
pub dyn_call_vijj: Option<Func<'a, (i32, i32, i32, i32, i32, i32)>>,
#[cfg(feature = "vfs")]
pub vfs: Option<Vfs>,
pub vfs: Option<EmscriptenVfs>,
}
impl<'a> EmscriptenData<'a> {
@ -241,8 +244,11 @@ pub fn run_emscripten_instance(
{
data.vfs = match module.info().custom_sections.get("wasmer:fs") {
Some(bytes) => match Vfs::from_compressed_bytes(&bytes[..]) {
Ok(vfs_backing) => Some(vfs_backing),
Err(e) => None,
Ok(vfs) => {
let emscripten_vfs = EmscriptenVfs::new(vfs);
Some(emscripten_vfs)
}
Err(_) => None,
},
None => None,
};
@ -459,6 +465,7 @@ 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),
// Null func
"nullFunc_i" => func!(crate::nullfunc::nullfunc_i),

144
lib/emscripten/src/syscalls/emscripten_vfs.rs Normal file
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@ -0,0 +1,144 @@
use crate::syscalls::emscripten_vfs::FileHandle::{Socket, VirtualFile};
use crate::varargs::VarArgs;
use std::cmp::{Eq, Ord, Ordering, PartialEq};
use std::collections::BTreeMap;
use std::env::home_dir;
use std::fmt::Display;
use wasmer_runtime_abi::vfs::device_file;
use wasmer_runtime_abi::vfs::vfs::Vfs;
pub type Fd = i32;
#[derive(Clone, Debug)]
pub struct VirtualFd(pub Fd);
impl Ord for VirtualFd {
fn cmp(&self, other: &Self) -> Ordering {
self.0.cmp(&other.0)
}
}
impl PartialOrd for VirtualFd {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.0.cmp(&other.0))
}
}
impl PartialEq for VirtualFd {
fn eq(&self, other: &Self) -> bool {
self.0 == other.0
}
}
impl Eq for VirtualFd {}
impl Display for VirtualFd {
fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
write!(f, "Fd({})", self.0)
}
}
pub enum FileHandle {
VirtualFile(Fd),
Socket(Fd),
}
pub type Map<K, V> = BTreeMap<K, V>;
pub type FdMap = Map<VirtualFd, FileHandle>;
pub struct EmscriptenVfs {
pub fd_map: FdMap,
pub vfs: Vfs,
}
impl EmscriptenVfs {
pub fn new(vfs: Vfs) -> Self {
let mut fd_map = FdMap::new();
vfs.fd_map
.keys()
.map(|handle| (handle, handle))
.for_each(|(virtual_handle, handle)| {
let vfd = VirtualFd(*virtual_handle);
fd_map.insert(vfd, FileHandle::VirtualFile(*handle));
});
// let _ = repo.create_dir(PathBuf::from("/dev/"));
// let stdin = repo.create_file(PathBuf::from("/dev/stdin"))?;
// let stdout = repo.create_file(PathBuf::from("/dev/stdout"))?;
// let stderr = repo.create_file(PathBuf::from("/dev/stderr"))?;
let stdin_fd = VirtualFd(0);
let stdin_handle = FileHandle::VirtualFile(0);
let stdout_fd = VirtualFd(1);
let stdout_handle = FileHandle::VirtualFile(1);
let stderr_fd = VirtualFd(2);
let stderr_handle = FileHandle::VirtualFile(2);
fd_map.insert(stdin_fd, stdin_handle);
fd_map.insert(stdout_fd, stdout_handle);
fd_map.insert(stderr_fd, stderr_handle);
EmscriptenVfs { fd_map, vfs }
}
pub fn close(&mut self, vfd: &VirtualFd) -> () {
match self.fd_map.get(&vfd) {
Some(FileHandle::VirtualFile(handle)) => {
self.vfs.close(handle);
},
Some(FileHandle::Socket(fd)) => unsafe {
libc::close(*fd);
},
None => panic!(),
}
self.fd_map.remove(&vfd);
}
pub fn next_lowest_fd(&self) -> VirtualFd {
next_lowest(&self.fd_map)
}
pub fn get_host_socket_fd(&self, vfd: &VirtualFd) -> Option<Fd> {
match self.fd_map.get(&vfd) {
Some(FileHandle::Socket(fd)) => Some(*fd),
_ => None,
}
}
pub fn get_virtual_file_handle(&self, vfd: VirtualFd) -> Option<Fd> {
match self.fd_map.get(&vfd) {
Some(FileHandle::VirtualFile(fd)) => Some(*fd),
_ => None,
}
}
pub fn open_file<P: AsRef<std::path::Path>>(&mut self, path: P) -> VirtualFd {
let fd = self.vfs.open_file(path).unwrap();
let vfd = VirtualFd(fd);
let file = FileHandle::VirtualFile(fd);
self.fd_map.insert(vfd.clone(), file);
vfd
}
pub fn new_socket_fd(&mut self, host_fd: Fd) -> VirtualFd {
let vfd = self.next_lowest_fd();
self.fd_map.insert(vfd.clone(), FileHandle::Socket(host_fd));
vfd
}
}
fn next_lowest(fd_map: &FdMap) -> VirtualFd {
let mut next_lowest_fd = 0;
for (vfd, _) in fd_map.iter() {
let host_fd = vfd.0;
if host_fd == next_lowest_fd {
next_lowest_fd += 1;
} else if host_fd < next_lowest_fd {
panic!("Should not be here.");
} else {
break;
}
}
VirtualFd(next_lowest_fd)
}

79
lib/emscripten/src/syscalls/mod.rs
View File

@ -4,13 +4,27 @@ mod unix;
#[cfg(windows)]
mod windows;
#[cfg(feature = "vfs")]
mod vfs;
#[cfg(feature = "vfs")]
mod emscripten_vfs;
#[cfg(unix)]
pub use self::unix::*;
#[cfg(windows)]
pub use self::windows::*;
#[cfg(feature = "vfs")]
pub use self::vfs::*;
#[cfg(feature = "vfs")]
pub use self::emscripten_vfs::*;
#[cfg(not(feature = "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
@ -21,10 +35,7 @@ use libc::{
c_void,
chdir,
// fcntl, setsockopt, getppid
close,
dup2,
exit,
fstat,
getpid,
// iovec,
lseek,
@ -32,7 +43,6 @@ use libc::{
// readv,
rmdir,
// writev,
stat,
write,
// sockaddr_in,
};
@ -65,27 +75,8 @@ pub fn ___syscall3(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
ret as _
}
/// read
#[cfg(feature = "vfs")]
pub fn ___syscall3(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// -> ssize_t
debug!("emscripten::___syscall3 (read - vfs) {}", 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 u8;
let mut buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
let emscripten_data = crate::env::get_emscripten_data(ctx);
let ret = match &mut emscripten_data.vfs {
Some(vfs) => vfs.read_file(fd as _, &mut buf_slice).unwrap(),
None => 0,
};
debug!("=> ret: {}", ret);
ret as _
}
/// write
#[cfg(not(feature = "vfs"))]
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);
@ -96,29 +87,13 @@ pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
unsafe { write(fd, buf_addr, count as _) as i32 }
}
/// open
#[cfg(feature = "vfs")]
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_pointer!(ctx.memory(0), pathname) as *const i8;
let path_str = unsafe { std::ffi::CStr::from_ptr(pathname_addr).to_str().unwrap() };
let emscripten_data = crate::env::get_emscripten_data(ctx);
let fd = if let Some(vfs) = &mut emscripten_data.vfs {
vfs.open_file(path_str).unwrap_or(-1)
} else {
-1
};
debug!("=> fd: {}", fd);
return fd as _;
}
/// close
#[cfg(not(feature = "vfs"))]
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) }
unsafe { libc::close(fd) }
}
// chdir
@ -139,6 +114,8 @@ pub fn ___syscall10(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
-1
}
/// chmod
#[cfg(not(feature = "vfs"))]
pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall15");
-1
@ -194,20 +171,22 @@ pub fn ___syscall60(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
-1
}
// dup2
/// dup2
#[cfg(not(feature = "vfs"))]
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) }
unsafe { libc::dup2(src, dst) }
}
// getppid
pub fn ___syscall64(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall64 (getppid)");
unsafe { getpid() }
let result = unsafe { getpid() };
result
}
pub fn ___syscall66(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
@ -395,6 +374,7 @@ pub fn ___syscall199(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
}
// stat64
#[cfg(not(feature = "vfs"))]
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);
@ -403,8 +383,8 @@ 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: stat = std::mem::zeroed();
let ret = stat(pathname_addr, &mut _stat);
let mut _stat: libc::stat = std::mem::zeroed();
let ret = libc::stat(pathname_addr, &mut _stat);
debug!("ret: {}", ret);
if ret != 0 {
return ret;
@ -414,7 +394,8 @@ pub fn ___syscall195(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
0
}
// fstat64
/// fstat64
#[cfg(not(feature = "vfs"))]
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);
@ -422,7 +403,7 @@ pub fn ___syscall197(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
unsafe {
let mut stat = std::mem::zeroed();
let ret = fstat(fd, &mut stat);
let ret = libc::fstat(fd, &mut stat);
debug!("ret: {}", ret);
if ret != 0 {
return ret;

105
lib/emscripten/src/syscalls/unix.rs
View File

@ -8,7 +8,6 @@ use libc::{
c_char,
c_int,
c_void,
chown,
// fcntl, setsockopt, getppid
connect,
dup2,
@ -22,11 +21,8 @@ use libc::{
ioctl,
// iovec,
listen,
mkdir,
msghdr,
pid_t,
pread,
pwrite,
// readv,
recvfrom,
recvmsg,
@ -56,7 +52,7 @@ use libc::{
};
use wasmer_runtime_core::vm::Ctx;
use std::mem;
use std::{mem, slice};
// Linking to functions that are not provided by rust libc
#[cfg(target_os = "macos")]
@ -94,6 +90,7 @@ pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
}
// chown
#[cfg(not(feature = "vfs"))]
pub fn ___syscall212(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall212 (chown) {}", _which);
@ -103,25 +100,28 @@ pub fn ___syscall212(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 { chown(pathname_addr, owner, group) }
unsafe { libc::chown(pathname_addr, owner, group) }
}
// mkdir
#[cfg(not(feature = "vfs"))]
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 { mkdir(pathname_addr, mode as _) }
unsafe { libc::mkdir(pathname_addr, mode as _) }
}
// getgid
//#[cfg(not(feature = "vfs"))]
pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall201 (getgid)");
unsafe {
let result = unsafe {
// Maybe fix: Emscripten returns 0 always
getgid() as i32
}
};
result
}
// getgid32
@ -169,6 +169,7 @@ pub fn ___syscall330(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_
}
/// ioctl
#[cfg(not(feature = "vfs"))]
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);
@ -211,6 +212,7 @@ pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int
}
// socketcall
#[cfg(not(feature = "vfs"))]
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall102 (socketcall) {}", _which);
@ -251,18 +253,22 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
ioctl(fd, FIOCLEX);
};
type T = u32;
let payload = 1 as *const T as _;
unsafe {
let err = errno::errno();
// type T = u32;
// let payload = 1 as *const T as _;
let result = unsafe {
setsockopt(
fd,
SOL_SOCKET,
SO_NOSIGPIPE,
payload,
mem::size_of::<T>() as socklen_t,
);
0 as *const _,
4,
)
};
let err2 = errno::errno();
debug!(
"=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}",
domain, ty, protocol, fd
@ -280,11 +286,12 @@ 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!(
unsafe {
debug!(
"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
(*_proper_address).sin_family, (*_proper_address).sin_port, (*_proper_address).sin_addr.s_addr
);
}
let status = unsafe { bind(socket, address, address_len) };
// debug!("=> status: {}", status);
debug!(
@ -334,11 +341,24 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let fd = unsafe { accept(socket, address, address_len_addr) };
use bit_field::BitArray;
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 sa_data = (*address).sa_data;
// let sa_data_slice: &[i8] = slice::from_raw_parts((*address).sa_data, 14);
let x = (*address).sa_data[0];
let y = (*address).sa_data[1];
let raw_family: [i8; 2] = [x, y];
let zz = std::mem::transmute::<[i8; 2], i16>(raw_family);
// let sin_family = &sa_data_slice[0..2];
// let sin_port = &sa_data_slice[2..4];
let _proper_address = address as *const GuestSockaddrIn;
let x = 10;
};
// set_cloexec
@ -434,7 +454,8 @@ 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;
unsafe { getsockopt(socket, level, name, value_addr, option_len_addr) }
let result = unsafe { getsockopt(socket, level, name, value_addr, option_len_addr) };
result
}
16 => {
debug!("socket: sendmsg");
@ -461,7 +482,8 @@ pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
}
}
// pread
/// pread
#[cfg(not(feature = "vfs"))]
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);
@ -475,10 +497,11 @@ pub fn ___syscall180(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
unsafe { pread(fd, buf_ptr, count as _, offset) as _ }
unsafe { libc::pread(fd, buf_ptr, count as _, offset) as _ }
}
// pwrite
/// pwrite
#[cfg(not(feature = "vfs"))]
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);
@ -491,7 +514,7 @@ pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
let offset: i64 = varargs.get(ctx);
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
let status = unsafe { pwrite(fd, buf_ptr, count as _, offset) as _ };
let status = unsafe { libc::pwrite(fd, buf_ptr, count as _, offset) as _ };
debug!(
"=> fd: {}, buf: {}, count: {}, offset: {} = status:{}",
fd, buf, count, offset, status
@ -518,6 +541,7 @@ pub fn ___syscall114(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_
}
// select
#[cfg(not(feature = "vfs"))]
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall142(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall142 (newselect) {}", _which);
@ -528,13 +552,44 @@ pub fn ___syscall142(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
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_set_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as *mut _;
let readfds_set_u8_ptr = readfds_set_ptr as *mut u8;
let writefds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as *mut _;
let writefds_set_u8_ptr = writefds_set_ptr as *mut u8;
let nfds = nfds as _;
let readfds_slice = unsafe { slice::from_raw_parts_mut(readfds_set_u8_ptr, nfds) };
let writefds_slice = unsafe { slice::from_raw_parts_mut(writefds_set_u8_ptr, nfds) };
let nfds = nfds as _;
use bit_field::BitArray;
let mut bits = vec![];
for virtual_fd in 0..nfds {
let bit_flag = readfds_slice.get_bit(virtual_fd as usize);
if !bit_flag {
continue;
}
bits.push(virtual_fd);
}
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 _) }
// let rd = unsafe { libc::read(bits[0], 0 as *mut _, 0)};
let err = errno::errno();
let result = unsafe { select(nfds, readfds_ptr, writefds_ptr, 0 as _, 0 as _) };
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
assert!(exceptfds == 0, "`exceptfds` is not supporrted");
let err = errno::errno();
debug!("gah again: {}", err);
result
// unsafe { select(nfds, readfds_ptr, writefds_ptr, 0 as _, 0 as _) }
}
// setpgid

899
lib/emscripten/src/syscalls/vfs.rs Normal file
View File

@ -0,0 +1,899 @@
use crate::emscripten_set_up_memory;
use crate::env::get_emscripten_data;
use crate::syscalls::emscripten_vfs::FileHandle::{Socket, VirtualFile};
use crate::syscalls::emscripten_vfs::{FileHandle, VirtualFd};
use crate::utils::{copy_stat_into_wasm, read_string_from_wasm};
use crate::varargs::VarArgs;
use libc::stat;
use std::os::raw::c_int;
use std::slice;
use wasmer_runtime_abi::vfs::vfs::Fd;
use wasmer_runtime_core::vm::Ctx;
// 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;
use std::ffi::c_void;
#[cfg(not(target_os = "darwin"))]
const SO_NOSIGPIPE: c_int = 0;
/// 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_pointer!(ctx.memory(0), buf) as *mut u8;
let mut 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 vfd = VirtualFd(fd);
let virtual_file_handle = vfs.get_virtual_file_handle(vfd).unwrap();
let ret = vfs
.vfs
.read_file(virtual_file_handle as _, &mut buf_slice)
.unwrap();
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_pointer!(ctx.memory(0), buf);
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
let vfd = VirtualFd(fd);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let count: usize = match vfs.fd_map.get(&vfd) {
Some(FileHandle::VirtualFile(handle)) => {
vfs.vfs
.write_file(*handle as _, buf_slice, count as _, 0)
.unwrap();
count as usize
}
Some(FileHandle::Socket(host_fd)) => unsafe {
libc::write(*host_fd, buf_addr as _, count as _) as usize
},
None => panic!(),
};
let string = read_string_from_wasm(ctx.memory(0), buf);
debug!(
"=> fd: {} (host {}), buf: {}, count: {}\n",
vfd.0, fd, buf, count
);
debug!("=> data:\n \"{}\"", string);
count as c_int
}
/// 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_pointer!(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.vfs.open_file(path_str).unwrap();
let virtual_file_handle = FileHandle::VirtualFile(fd);
let virtual_fd = vfs.next_lowest_fd();
let fd = virtual_fd.0;
assert!(
!vfs.fd_map.contains_key(&virtual_fd),
"Emscripten vfs should not contain file descriptor."
);
vfs.fd_map.insert(virtual_fd, virtual_file_handle);
debug!("=> opening `{}` with new virtual fd: {}", path_str, fd);
debug!("{}", path_str);
return fd as _;
}
/// 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);
debug!("closing virtual fd {}...", fd);
// let emscripten_data = crate::env::get_emscripten_data(ctx);
let mut vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(fd);
match vfs.fd_map.get(&vfd) {
Some(VirtualFile(handle)) => {
vfs.vfs.close(handle).unwrap();
vfs.fd_map.remove(&vfd);
0
}
Some(Socket(host_fd)) => unsafe {
let result = libc::close(*host_fd);
if result == 0 {
vfs.fd_map.remove(&vfd);
0
} else {
-1
}
},
_ => -1,
}
}
/// 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);
// debug!("mkdir: {}", absolute_path.display());
let emscripten_data = crate::env::get_emscripten_data(ctx);
let ret = if let Some(vfs) = &mut emscripten_data.vfs {
match vfs.vfs.make_dir(&absolute_path) {
Ok(_) => 0,
Err(_) => -1,
}
} else {
-1
};
// debug!("mkdir returns {}", ret);
ret
}
/// 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 vfd = VirtualFd(fd);
let host_fd = match vfs.fd_map.get(&vfd) {
Some(Socket(host_fd)) => *host_fd,
Some(_) => 0,
_ => panic!("Should not ioctl on a vbox file."),
};
// 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_pointer!(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_pointer!(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 src = VirtualFd(src);
let dst = VirtualFd(dst);
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;
}
// test if the destination needs to closed first, if so, close it atomically (or fake it)
if vfs.fd_map.contains_key(&dst) {
vfs.close(&dst);
}
let dst_file_handle = match vfs.fd_map.get(&src) {
Some(FileHandle::VirtualFile(handle)) => {
let new_handle: i32 = vfs.vfs.duplicate_handle(handle);
FileHandle::VirtualFile(new_handle)
}
Some(FileHandle::Socket(src_host_fd)) => unsafe {
// get a dst file descriptor, or just use the underlying dup syscall
let dst_host_fd = libc::dup(*src_host_fd);
if dst_host_fd == -1 {
panic!()
}
FileHandle::Socket(dst_host_fd)
},
None => panic!(),
};
vfs.fd_map.insert(dst.clone(), dst_file_handle);
let dst = dst.0;
debug!("emscripten::___syscall63 (dup2) returns {}", dst);
dst
}
/// 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);
// debug!(
// "=> fd: {}, buf_offset: {}, count: {}, offset: {}",
// fd, buf, count, offset
// );
let buf_addr = emscripten_memory_pointer!(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 emscripten_data = crate::env::get_emscripten_data(ctx);
// let ret = match &mut emscripten_data.vfs {
// Some(vfs) => vfs.vfs.read_file(fd as _, &mut buf_slice_with_offset).unwrap(),
// None => 0,
// };
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(fd);
let virtual_file_handle = vfs.get_virtual_file_handle(vfd).unwrap();
let ret = vfs
.vfs
.read_file(virtual_file_handle as _, &mut buf_slice_with_offset)
.unwrap();
// debug!("=> pread returns: {}", ret);
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_pointer!(ctx.memory(0), buf);
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
// let emscripten_data = crate::env::get_emscripten_data(ctx);
// let count = if let Some(vfs) = &mut emscripten_data.vfs {
// vfs.vfs.write_file(fd as _, buf_slice, count as _, offset as _)
// .unwrap()
// } else {
// 0
// };
let vfd = VirtualFd(fd);
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let virtual_file_handle = vfs.get_virtual_file_handle(vfd).unwrap();
vfs.vfs
.write_file(virtual_file_handle as _, buf_slice, count as _, offset as _)
.unwrap();
count as _
}
// stat64
#[cfg(feature = "vfs")]
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.vfs.get_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 vfd = VirtualFd(fd);
let ret = match vfs.fd_map.get(&vfd) {
Some(FileHandle::VirtualFile(internal_handle)) => {
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
}
// getgid
//pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
// debug!("emscripten::___syscall201 (getgid)");
// 0
//}
// 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);
#[cfg(target_os = "windows")]
type libc_sa_family_t = u16;
#[cfg(not(target_os = "windows"))]
type libc_sa_family_t = libc::sa_family_t;
#[cfg(target_os = "windows")]
type libc_in_port_t = u16;
#[cfg(not(target_os = "windows"))]
type libc_in_port_t = libc::in_port_t;
#[cfg(target_os = "windows")]
type libc_in_addr_t = u32;
#[cfg(not(target_os = "windows"))]
type libc_in_addr_t = libc::in_addr_t;
#[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");
// 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);
debug!("--- host fd from libc::socket: {} ---", host_fd);
debug!("--- reference fd in vfs from libc::socket: {} ---", vfd);
// set_cloexec
let ioctl_result = unsafe { libc::ioctl(host_fd, libc::FIOCLEX) };
use libc::{setsockopt, socklen_t, SOL_SOCKET};
let err = errno::errno();
type T = u32;
let payload = 1 as *const T as _;
let setsockopt_result = unsafe {
setsockopt(
host_fd,
SOL_SOCKET,
SO_NOSIGPIPE,
payload,
std::mem::size_of::<T>() as libc::socklen_t,
)
};
let err2 = errno::errno();
debug!(
"=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}",
domain, ty, protocol, vfd
);
vfd.0 as _
}
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_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
let thinfy = libc::AF_INET;
let thinfy2 = libc::AF_UNIX;
// Debug received address
let _proper_address = address as *const GuestSockaddrIn;
let _other_proper_address = address as *const libc::sockaddr;
unsafe {
debug!(
"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
(*_proper_address).sin_family, (*_proper_address).sin_port, (*_proper_address).sin_addr.s_addr
);
let ex = 10;
}
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_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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 vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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_pointer!(ctx.memory(0), address_addr) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_pointer!(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 vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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) };
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 x = 10;
};
// 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.0, new_accept_host_fd);
new_vfd.0 as _
}
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_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let socket_fd = vfs.fd_map.get(&vfd).unwrap();
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
let address_len_addr =
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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_pointer!(ctx.memory(0), buf) as _;
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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 len: i32 = socket_varargs.get(ctx);
let flags = socket_varargs.get(ctx);
let address: u32 = socket_varargs.get(ctx);
let address_len: u32 = 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 libc::sockaddr;
let address_len_addr =
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
unsafe {
libc::recvfrom(
host_socket_fd,
buf_addr,
flags,
len,
address,
address_len_addr,
) as i32
}
}
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 x_level: 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_pointer!(ctx.memory(0), value) as _; // Endian problem
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
let ret = unsafe {
libc::setsockopt(host_socket_fd as _, level, name, value_addr, option_len)
};
let bf = unsafe { slice::from_raw_parts(value_addr as *const u8, option_len as _) };
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 name: i32 = socket_varargs.get(ctx);
let value: u32 = socket_varargs.get(ctx);
let option_len: u32 = socket_varargs.get(ctx);
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 vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
let result = unsafe {
libc::getsockopt(host_socket_fd, level, name, value_addr, option_len_addr)
};
if result == -1 {
let err = errno::errno();
debug!("socket: getsockopt -- error -- {}", err);
}
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_pointer!(ctx.memory(0), msg) as *const libc::msghdr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).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_pointer!(ctx.memory(0), msg) as *mut libc::msghdr;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let vfd = VirtualFd(socket);
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
unsafe { libc::recvmsg(host_socket_fd as _, msg_addr, flags) as i32 }
}
_ => {
// others
-1
}
}
}
/// 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_eq!(exceptfds, 0, "`exceptfds` is not supporrted");
let readfds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as *mut _;
let readfds_set_u8_ptr = readfds_set_ptr as *mut u8;
let writefds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as *mut _;
let writefds_set_u8_ptr = writefds_set_ptr as *mut u8;
let nfds = nfds as _;
let readfds_slice = unsafe { slice::from_raw_parts_mut(readfds_set_u8_ptr, nfds) };
let writefds_slice = unsafe { slice::from_raw_parts_mut(writefds_set_u8_ptr, nfds) };
use bit_field::BitArray;
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
let mut file_descriptors_to_watch = vec![];
for virtual_fd in 0..nfds {
let bit_flag = readfds_slice.get_bit(virtual_fd as usize);
if !bit_flag {
continue;
}
file_descriptors_to_watch.push(virtual_fd);
}
let mut count = 0;
let mut max = -1;
let mut read_mappings = vec![];
for virtual_fd in 0..nfds {
let bit_flag = readfds_slice.get_bit(virtual_fd);
if !bit_flag {
continue;
}
let virtual_file = vfs.fd_map.get(&VirtualFd(virtual_fd as _));
match virtual_file {
Some(FileHandle::VirtualFile(fd)) => {
count = count + 1;
}
Some(FileHandle::Socket(host_fd)) => {
count = count + 1;
unsafe {
let virtual_fd = virtual_fd as i32;
let fd = *host_fd;
if fd > max {
max = fd;
}
read_mappings.push((virtual_fd, fd));
};
}
None => {}
};
}
for mapping in read_mappings.clone() {
let (virtual_fd, fd) = mapping;
unsafe {
libc::FD_CLR(virtual_fd, readfds_set_ptr);
libc::FD_SET(fd, readfds_set_ptr);
}
}
// #[repr(C)]
// pub struct timeval {
// pub tv_sec: libc::c_long, // time t
// pub tv_usec: libc::c_long, // long int
// }
let timeval_ptr = emscripten_memory_pointer!(ctx.memory(0), timeout) as *mut libc::timeval;
let mut tval = unsafe {
libc::timeval {
tv_sec: (*timeval_ptr).tv_sec,
tv_usec: (*timeval_ptr).tv_usec,
}
};
let mut tval_ptr: *mut libc::timeval = &mut tval;
let sz = max as i32 + 1;
// let result = unsafe { libc::select(sz, readfds_set_ptr, writefds_set_ptr, 0 as _, timeval_ptr as *mut libc::timeval) };
let result = unsafe { libc::select(sz, readfds_set_ptr, writefds_set_ptr, 0 as _, 0 as _) };
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
// assert!(exceptfds == 0, "`exceptfds` is not supporrted");
let err = errno::errno();
debug!("gah again: {}", err);
// let len = read_mappings.len();
for mapping in read_mappings {
let (virtual_fd, fd) = mapping;
unsafe {
libc::FD_CLR(fd, readfds_set_ptr);
libc::FD_SET(virtual_fd, readfds_set_ptr);
}
}
for input in file_descriptors_to_watch {
unsafe {
let in_set = libc::FD_ISSET(input as _, readfds_set_ptr);
assert!(in_set);
}
}
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);
debug!("syscall `chown` always returns 0");
0
}

12
lib/emscripten/src/syscalls/windows.rs
View File

@ -69,6 +69,7 @@ pub fn ___syscall212(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_i
}
// mkdir
#[cfg(not(feature = "vfs"))]
pub fn ___syscall39(ctx: &mut Ctx, which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall39 (mkdir) {}", which);
#[cfg(not(feature = "debug"))]
@ -106,6 +107,7 @@ pub fn ___syscall54(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_in
}
// socketcall
#[cfg(not(feature = "vfs"))]
#[allow(clippy::cast_ptr_alignment)]
pub fn ___syscall102(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall102 (socketcall) {}", which);
@ -114,16 +116,18 @@ pub fn ___syscall102(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_i
-1
}
// pread
pub fn ___syscall180(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_int {
/// pread
#[cfg(not(feature = "vfs"))]
pub fn ___syscall180(ctx: &mut Ctx, which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall180 (pread) {}", which);
#[cfg(not(feature = "debug"))]
let _ = which;
-1
}
// pwrite
pub fn ___syscall181(_ctx: &mut Ctx, which: c_int, mut _varargs: VarArgs) -> c_int {
/// pwrite
#[cfg(not(feature = "vfs"))]
pub fn ___syscall181(ctx: &mut Ctx, which: c_int, mut varargs: VarArgs) -> c_int {
debug!("emscripten::___syscall181 (pwrite) {}", which);
#[cfg(not(feature = "debug"))]
let _ = which;

22
lib/emscripten/src/utils.rs
View File

@ -90,24 +90,6 @@ 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,
@ -188,9 +170,7 @@ mod tests {
#[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()
panic!("compiler not specified, activate a compiler via features")
}
#[test]

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

@ -62,10 +62,31 @@ 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;
let module = wasmer_runtime_core::compile_with(&wasm_bytes[..], &CraneliftCompiler::new())
#[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)
.expect("WASM can't be compiled");
let mut emscripten_globals = EmscriptenGlobals::new(&module);