mirror of
https://github.com/mii443/wasmer.git
synced 2025-12-08 05:38:19 +00:00
remove unix-specific code from code windows sees
This commit is contained in:
Mark McCaskey
199
lib/emscripten/src/env/unix/mod.rs
vendored
199
lib/emscripten/src/env/unix/mod.rs
vendored
@@ -3,13 +3,17 @@ use libc::{
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c_int, getenv, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam, putenv, setenv, sysconf,
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unsetenv,
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};
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use std::cell::Cell;
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use std::ffi::CStr;
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use std::mem;
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use std::os::raw::c_char;
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use crate::env::call_malloc;
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use crate::env::{call_malloc, call_malloc_with_cast, EmAddrInfo, EmSockAddr};
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use crate::utils::{copy_cstr_into_wasm, copy_terminated_array_of_cstrs};
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use wasmer_runtime_core::vm::Ctx;
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use wasmer_runtime_core::{
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memory::ptr::{Array, WasmPtr},
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vm::Ctx,
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};
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// #[no_mangle]
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/// emscripten: _getenv // (name: *const char) -> *const c_char;
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@@ -140,3 +144,194 @@ pub fn _sysconf(_ctx: &mut Ctx, name: c_int) -> i32 {
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// TODO: Implement like emscripten expects regarding memory/page size
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unsafe { sysconf(name) as i32 } // TODO review i64
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}
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// this may be a memory leak, probably not though because emscripten does the same thing
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pub fn _gai_strerror(ctx: &mut Ctx, ecode: i32) -> i32 {
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debug!("emscripten::_gai_strerror({})", ecode);
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let cstr = unsafe { std::ffi::CStr::from_ptr(libc::gai_strerror(ecode)) };
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let bytes = cstr.to_bytes_with_nul();
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let string_on_guest: WasmPtr<c_char, Array> = call_malloc_with_cast(ctx, bytes.len() as _);
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let writer = unsafe {
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string_on_guest
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.deref_mut(ctx.memory(0), 0, bytes.len() as _)
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.unwrap()
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};
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for (i, byte) in bytes.iter().enumerate() {
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writer[i].set(*byte as i8);
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}
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string_on_guest.offset() as _
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}
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pub fn _getaddrinfo(
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ctx: &mut Ctx,
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node_ptr: WasmPtr<c_char>,
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service_str_ptr: WasmPtr<c_char>,
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hints_ptr: WasmPtr<EmAddrInfo>,
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res_val_ptr: WasmPtr<WasmPtr<EmAddrInfo>>,
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) -> i32 {
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use libc::{addrinfo, freeaddrinfo};
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debug!("emscripten::_getaddrinfo");
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let memory = ctx.memory(0);
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debug!(" => node = {}", unsafe {
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node_ptr
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.deref(memory)
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.map(|np| {
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std::ffi::CStr::from_ptr(np as *const Cell<c_char> as *const c_char)
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.to_string_lossy()
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})
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.unwrap_or(std::borrow::Cow::Borrowed("null"))
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});
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debug!(" => server_str = {}", unsafe {
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service_str_ptr
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.deref(memory)
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.map(|np| {
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std::ffi::CStr::from_ptr(np as *const Cell<c_char> as *const c_char)
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.to_string_lossy()
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})
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.unwrap_or(std::borrow::Cow::Borrowed("null"))
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});
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let hints = hints_ptr.deref(memory).map(|hints_memory| {
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let hints_guest = dbg!(hints_memory.get());
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unsafe {
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let mut hints_native: addrinfo = std::mem::uninitialized();
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hints_native.ai_flags = hints_guest.ai_flags;
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hints_native.ai_family = hints_guest.ai_family;
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hints_native.ai_socktype = hints_guest.ai_socktype;
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hints_native.ai_protocol = hints_guest.ai_protocol;
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hints_native.ai_addrlen = 0;
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hints_native.ai_addr = std::ptr::null_mut();
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hints_native.ai_canonname = std::ptr::null_mut();
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hints_native.ai_next = std::ptr::null_mut();
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hints_native
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}
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});
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let mut out_ptr: *mut addrinfo = std::ptr::null_mut();
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// allocate equivalent memory for res_val_ptr
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let result = unsafe {
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libc::getaddrinfo(
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(node_ptr
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.deref(memory)
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.map(|m| m as *const Cell<c_char> as *const c_char))
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.unwrap_or(std::ptr::null()),
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(service_str_ptr
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.deref(memory)
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.map(|m| m as *const Cell<c_char> as *const c_char))
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.unwrap_or(std::ptr::null()),
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hints
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.as_ref()
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.map(|h| h as *const addrinfo)
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.unwrap_or(std::ptr::null()),
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&mut out_ptr as *mut *mut addrinfo,
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)
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};
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if dbg!(result) != 0 {
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return result;
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}
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// walk linked list and copy over, freeing them from the kernel
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let head_of_list = unsafe {
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let mut current_host_node = out_ptr;
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let mut head_of_list = None;
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let mut previous_guest_node: Option<WasmPtr<EmAddrInfo>> = None;
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while !current_host_node.is_null() {
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let current_guest_node_ptr: WasmPtr<EmAddrInfo> =
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call_malloc_with_cast(ctx, std::mem::size_of::<EmAddrInfo>() as _);
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if head_of_list.is_none() {
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dbg!("Setting head of list");
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head_of_list = Some(current_guest_node_ptr);
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}
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// connect list
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if let Some(prev_guest) = previous_guest_node {
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let mut pg = prev_guest.deref_mut(ctx.memory(0)).unwrap().get_mut();
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pg.ai_next = current_guest_node_ptr;
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dbg!("list connected");
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}
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// update values
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let host_addrlen = (*current_host_node).ai_addrlen;
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// allocate addr and copy data
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let guest_sockaddr_ptr = {
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let host_sockaddr_ptr = (*current_host_node).ai_addr;
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let guest_sockaddr_ptr: WasmPtr<EmSockAddr> =
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call_malloc_with_cast(ctx, host_addrlen as _);
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let guest_sockaddr = guest_sockaddr_ptr
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.deref_mut(ctx.memory(0))
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.unwrap()
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.get_mut();
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guest_sockaddr.sa_family = (*host_sockaddr_ptr).sa_family as i16;
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guest_sockaddr.sa_data = (*host_sockaddr_ptr).sa_data.clone();
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guest_sockaddr_ptr
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};
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dbg!("Socketaddr allocated");
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// allocate canon name on guest and copy data over
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let guest_canonname_ptr = {
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let str_ptr = (*current_host_node).ai_canonname;
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if !str_ptr.is_null() {
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let canonname_cstr = dbg!(std::ffi::CStr::from_ptr(str_ptr));
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let canonname_bytes = canonname_cstr.to_bytes_with_nul();
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let str_size = dbg!(canonname_bytes.len());
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let guest_canonname: WasmPtr<c_char, Array> =
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call_malloc_with_cast(ctx, str_size as _);
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let guest_canonname_writer = guest_canonname
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.deref(ctx.memory(0), 0, str_size as _)
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.unwrap();
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for (i, b) in canonname_bytes.into_iter().enumerate() {
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guest_canonname_writer[i].set(*b as i8)
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}
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guest_canonname
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} else {
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WasmPtr::new(0)
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}
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};
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dbg!("canonname allocated");
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let mut current_guest_node = current_guest_node_ptr
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.deref_mut(ctx.memory(0))
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.unwrap()
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.get_mut();
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// TODO order these
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current_guest_node.ai_flags = (*current_host_node).ai_flags;
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current_guest_node.ai_family = (*current_host_node).ai_family;
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current_guest_node.ai_socktype = (*current_host_node).ai_socktype;
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current_guest_node.ai_protocol = (*current_host_node).ai_protocol;
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current_guest_node.ai_addrlen = host_addrlen;
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current_guest_node.ai_addr = guest_sockaddr_ptr;
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current_guest_node.ai_canonname = guest_canonname_ptr;
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current_guest_node.ai_next = WasmPtr::new(0);
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dbg!("Guest node updated");
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previous_guest_node = Some(current_guest_node_ptr);
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current_host_node = (*current_host_node).ai_next;
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dbg!("End of loop bookkeeping finished");
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}
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dbg!("freeing memory");
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// this frees all connected nodes on the linked list
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freeaddrinfo(out_ptr);
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head_of_list.unwrap_or(WasmPtr::new(0))
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};
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res_val_ptr
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.deref(ctx.memory(0))
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.unwrap()
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.set(dbg!(head_of_list));
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0
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}
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