diff --git a/mk/crates.mk b/mk/crates.mk index 1a9d1e82467..2523575b078 100644 --- a/mk/crates.mk +++ b/mk/crates.mk @@ -49,7 +49,7 @@ # automatically generated for all stage/host/target combinations. ################################################################################ -TARGET_CRATES := libc std green native flate arena term \ +TARGET_CRATES := libc std green flate arena term \ serialize sync getopts collections test time rand \ log regex graphviz core rbml alloc rustrt \ unicode @@ -67,7 +67,6 @@ DEPS_std := core libc rand alloc collections rustrt sync unicode \ native:rust_builtin native:backtrace DEPS_graphviz := std DEPS_green := std native:context_switch -DEPS_native := std DEPS_syntax := std term serialize log fmt_macros arena libc DEPS_rustc_trans := rustc rustc_back rustc_llvm libc DEPS_rustc := syntax flate arena serialize getopts rbml \ @@ -95,9 +94,9 @@ DEPS_regex := std DEPS_regex_macros = rustc syntax std regex DEPS_fmt_macros = std -TOOL_DEPS_compiletest := test getopts native -TOOL_DEPS_rustdoc := rustdoc native -TOOL_DEPS_rustc := rustc_trans native +TOOL_DEPS_compiletest := test getopts +TOOL_DEPS_rustdoc := rustdoc +TOOL_DEPS_rustc := rustc_trans TOOL_SOURCE_compiletest := $(S)src/compiletest/compiletest.rs TOOL_SOURCE_rustdoc := $(S)src/driver/driver.rs TOOL_SOURCE_rustc := $(S)src/driver/driver.rs diff --git a/src/driver/driver.rs b/src/driver/driver.rs index 632d21d7b9c..224b4f1b5c5 100644 --- a/src/driver/driver.rs +++ b/src/driver/driver.rs @@ -8,6 +8,8 @@ // option. This file may not be copied, modified, or distributed // except according to those terms. +#![no_start] + #[cfg(rustdoc)] extern crate "rustdoc" as this; diff --git a/src/libnative/io/addrinfo.rs b/src/libnative/io/addrinfo.rs deleted file mode 100644 index d40438e4272..00000000000 --- a/src/libnative/io/addrinfo.rs +++ /dev/null @@ -1,116 +0,0 @@ -// Copyright 2014 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 or the MIT license -// , at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -use libc::{c_char, c_int}; -use libc; -use std::mem; -use std::ptr::{null, null_mut}; -use std::rt::rtio; -use std::rt::rtio::IoError; - -use super::net; - -pub struct GetAddrInfoRequest; - -impl GetAddrInfoRequest { - pub fn run(host: Option<&str>, servname: Option<&str>, - hint: Option) - -> Result, IoError> - { - assert!(host.is_some() || servname.is_some()); - - let c_host = host.map(|x| x.to_c_str()); - let c_host = c_host.as_ref().map(|x| x.as_ptr()).unwrap_or(null()); - let c_serv = servname.map(|x| x.to_c_str()); - let c_serv = c_serv.as_ref().map(|x| x.as_ptr()).unwrap_or(null()); - - let hint = hint.map(|hint| { - libc::addrinfo { - ai_flags: hint.flags as c_int, - ai_family: hint.family as c_int, - ai_socktype: 0, - ai_protocol: 0, - ai_addrlen: 0, - ai_canonname: null_mut(), - ai_addr: null_mut(), - ai_next: null_mut() - } - }); - - let hint_ptr = hint.as_ref().map_or(null(), |x| { - x as *const libc::addrinfo - }); - let mut res = null_mut(); - - // Make the call - let s = unsafe { - getaddrinfo(c_host, c_serv, hint_ptr, &mut res) - }; - - // Error? - if s != 0 { - return Err(get_error(s)); - } - - // Collect all the results we found - let mut addrs = Vec::new(); - let mut rp = res; - while rp.is_not_null() { - unsafe { - let addr = match net::sockaddr_to_addr(mem::transmute((*rp).ai_addr), - (*rp).ai_addrlen as uint) { - Ok(a) => a, - Err(e) => return Err(e) - }; - addrs.push(rtio::AddrinfoInfo { - address: addr, - family: (*rp).ai_family as uint, - socktype: 0, - protocol: 0, - flags: (*rp).ai_flags as uint - }); - - rp = (*rp).ai_next as *mut libc::addrinfo; - } - } - - unsafe { freeaddrinfo(res); } - - Ok(addrs) - } -} - -extern "system" { - fn getaddrinfo(node: *const c_char, service: *const c_char, - hints: *const libc::addrinfo, - res: *mut *mut libc::addrinfo) -> c_int; - fn freeaddrinfo(res: *mut libc::addrinfo); - #[cfg(not(windows))] - fn gai_strerror(errcode: c_int) -> *const c_char; -} - -#[cfg(windows)] -fn get_error(_: c_int) -> IoError { - net::last_error() -} - -#[cfg(not(windows))] -fn get_error(s: c_int) -> IoError { - use std::c_str::CString; - - let err_str = unsafe { - CString::new(gai_strerror(s), false).as_str().unwrap().to_string() - }; - IoError { - code: s as uint, - extra: 0, - detail: Some(err_str), - } -} diff --git a/src/libnative/io/process.rs b/src/libnative/io/process.rs deleted file mode 100644 index 30c916f3303..00000000000 --- a/src/libnative/io/process.rs +++ /dev/null @@ -1,1240 +0,0 @@ -// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 or the MIT license -// , at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -use libc::{pid_t, c_void, c_int}; -use libc; -use std::c_str::CString; -use std::io; -use std::mem; -use std::os; -use std::ptr; -use std::rt::rtio::{ProcessConfig, IoResult, IoError}; -use std::rt::rtio; - -use super::file; -use super::util; - -#[cfg(windows)] use std::io::fs::PathExtensions; -#[cfg(windows)] use std::string::String; -#[cfg(unix)] use super::c; -#[cfg(unix)] use super::retry; -#[cfg(unix)] use io::helper_thread::Helper; - -#[cfg(unix)] -helper_init!(static HELPER: Helper) - -/** - * A value representing a child process. - * - * The lifetime of this value is linked to the lifetime of the actual - * process - the Process destructor calls self.finish() which waits - * for the process to terminate. - */ -pub struct Process { - /// The unique id of the process (this should never be negative). - pid: pid_t, - - /// A handle to the process - on unix this will always be NULL, but on - /// windows it will be a HANDLE to the process, which will prevent the - /// pid being re-used until the handle is closed. - handle: *mut (), - - /// None until finish() is called. - exit_code: Option, - - /// Manually delivered signal - exit_signal: Option, - - /// Deadline after which wait() will return - deadline: u64, -} - -#[cfg(unix)] -enum Req { - NewChild(libc::pid_t, Sender, u64), -} - -impl Process { - /// Creates a new process using native process-spawning abilities provided - /// by the OS. Operations on this process will be blocking instead of using - /// the runtime for sleeping just this current task. - pub fn spawn(cfg: ProcessConfig) - -> IoResult<(Process, Vec>)> - { - // right now we only handle stdin/stdout/stderr. - if cfg.extra_io.len() > 0 { - return Err(super::unimpl()); - } - - fn get_io(io: rtio::StdioContainer, - ret: &mut Vec>) - -> IoResult> - { - match io { - rtio::Ignored => { ret.push(None); Ok(None) } - rtio::InheritFd(fd) => { - ret.push(None); - Ok(Some(file::FileDesc::new(fd, false))) - } - rtio::CreatePipe(readable, _writable) => { - let (reader, writer) = try!(pipe()); - let (theirs, ours) = if readable { - (reader, writer) - } else { - (writer, reader) - }; - ret.push(Some(ours)); - Ok(Some(theirs)) - } - } - } - - let mut ret_io = Vec::new(); - let res = spawn_process_os(cfg, - try!(get_io(cfg.stdin, &mut ret_io)), - try!(get_io(cfg.stdout, &mut ret_io)), - try!(get_io(cfg.stderr, &mut ret_io))); - - match res { - Ok(res) => { - let p = Process { - pid: res.pid, - handle: res.handle, - exit_code: None, - exit_signal: None, - deadline: 0, - }; - Ok((p, ret_io)) - } - Err(e) => Err(e) - } - } - - pub fn kill(pid: libc::pid_t, signum: int) -> IoResult<()> { - unsafe { killpid(pid, signum) } - } -} - -impl rtio::RtioProcess for Process { - fn id(&self) -> pid_t { self.pid } - - fn set_timeout(&mut self, timeout: Option) { - self.deadline = timeout.map(|i| i + ::io::timer::now()).unwrap_or(0); - } - - fn wait(&mut self) -> IoResult { - match self.exit_code { - Some(code) => Ok(code), - None => { - let code = try!(waitpid(self.pid, self.deadline)); - // On windows, waitpid will never return a signal. If a signal - // was successfully delivered to the process, however, we can - // consider it as having died via a signal. - let code = match self.exit_signal { - None => code, - Some(signal) if cfg!(windows) => rtio::ExitSignal(signal), - Some(..) => code, - }; - self.exit_code = Some(code); - Ok(code) - } - } - } - - fn kill(&mut self, signum: int) -> IoResult<()> { - #[cfg(unix)] use libc::EINVAL as ERROR; - #[cfg(windows)] use libc::ERROR_NOTHING_TO_TERMINATE as ERROR; - - // On Linux (and possibly other unices), a process that has exited will - // continue to accept signals because it is "defunct". The delivery of - // signals will only fail once the child has been reaped. For this - // reason, if the process hasn't exited yet, then we attempt to collect - // their status with WNOHANG. - if self.exit_code.is_none() { - match waitpid_nowait(self.pid) { - Some(code) => { self.exit_code = Some(code); } - None => {} - } - } - - // if the process has finished, and therefore had waitpid called, - // and we kill it, then on unix we might ending up killing a - // newer process that happens to have the same (re-used) id - match self.exit_code { - Some(..) => return Err(IoError { - code: ERROR as uint, - extra: 0, - detail: Some("can't kill an exited process".to_string()), - }), - None => {} - } - - // A successfully delivered signal that isn't 0 (just a poll for being - // alive) is recorded for windows (see wait()) - match unsafe { killpid(self.pid, signum) } { - Ok(()) if signum == 0 => Ok(()), - Ok(()) => { self.exit_signal = Some(signum); Ok(()) } - Err(e) => Err(e), - } - } -} - -impl Drop for Process { - fn drop(&mut self) { - free_handle(self.handle); - } -} - -pub fn pipe() -> IoResult<(file::FileDesc, file::FileDesc)> { - #[cfg(unix)] use libc::EMFILE as ERROR; - #[cfg(windows)] use libc::WSAEMFILE as ERROR; - struct Closer { fd: libc::c_int } - - let os::Pipe { reader, writer } = match unsafe { os::pipe() } { - Ok(p) => p, - Err(io::IoError { detail, .. }) => return Err(IoError { - code: ERROR as uint, - extra: 0, - detail: detail, - }) - }; - let mut reader = Closer { fd: reader }; - let mut writer = Closer { fd: writer }; - - let native_reader = file::FileDesc::new(reader.fd, true); - reader.fd = -1; - let native_writer = file::FileDesc::new(writer.fd, true); - writer.fd = -1; - return Ok((native_reader, native_writer)); - - impl Drop for Closer { - fn drop(&mut self) { - if self.fd != -1 { - let _ = unsafe { libc::close(self.fd) }; - } - } - } -} - -#[cfg(windows)] -unsafe fn killpid(pid: pid_t, signal: int) -> IoResult<()> { - let handle = libc::OpenProcess(libc::PROCESS_TERMINATE | - libc::PROCESS_QUERY_INFORMATION, - libc::FALSE, pid as libc::DWORD); - if handle.is_null() { - return Err(super::last_error()) - } - let ret = match signal { - // test for existence on signal 0 - 0 => { - let mut status = 0; - let ret = libc::GetExitCodeProcess(handle, &mut status); - if ret == 0 { - Err(super::last_error()) - } else if status != libc::STILL_ACTIVE { - Err(IoError { - code: libc::ERROR_NOTHING_TO_TERMINATE as uint, - extra: 0, - detail: None, - }) - } else { - Ok(()) - } - } - 15 | 9 => { // sigterm or sigkill - let ret = libc::TerminateProcess(handle, 1); - super::mkerr_winbool(ret) - } - _ => Err(IoError { - code: libc::ERROR_CALL_NOT_IMPLEMENTED as uint, - extra: 0, - detail: Some("unsupported signal on windows".to_string()), - }) - }; - let _ = libc::CloseHandle(handle); - return ret; -} - -#[cfg(not(windows))] -unsafe fn killpid(pid: pid_t, signal: int) -> IoResult<()> { - let r = libc::funcs::posix88::signal::kill(pid, signal as c_int); - super::mkerr_libc(r) -} - -struct SpawnProcessResult { - pid: pid_t, - handle: *mut (), -} - -#[cfg(windows)] -fn spawn_process_os(cfg: ProcessConfig, - in_fd: Option, - out_fd: Option, - err_fd: Option) - -> IoResult { - use libc::types::os::arch::extra::{DWORD, HANDLE, STARTUPINFO}; - use libc::consts::os::extra::{ - TRUE, FALSE, - STARTF_USESTDHANDLES, - INVALID_HANDLE_VALUE, - DUPLICATE_SAME_ACCESS - }; - use libc::funcs::extra::kernel32::{ - GetCurrentProcess, - DuplicateHandle, - CloseHandle, - CreateProcessW - }; - use libc::funcs::extra::msvcrt::get_osfhandle; - - use std::mem; - use std::iter::Iterator; - use std::str::StrPrelude; - - if cfg.gid.is_some() || cfg.uid.is_some() { - return Err(IoError { - code: libc::ERROR_CALL_NOT_IMPLEMENTED as uint, - extra: 0, - detail: Some("unsupported gid/uid requested on windows".to_string()), - }) - } - - // To have the spawning semantics of unix/windows stay the same, we need to - // read the *child's* PATH if one is provided. See #15149 for more details. - let program = cfg.env.and_then(|env| { - for &(ref key, ref v) in env.iter() { - if b"PATH" != key.as_bytes_no_nul() { continue } - - // Split the value and test each path to see if the program exists. - for path in os::split_paths(v.as_bytes_no_nul()).into_iter() { - let path = path.join(cfg.program.as_bytes_no_nul()) - .with_extension(os::consts::EXE_EXTENSION); - if path.exists() { - return Some(path.to_c_str()) - } - } - break - } - None - }); - - unsafe { - let mut si = zeroed_startupinfo(); - si.cb = mem::size_of::() as DWORD; - si.dwFlags = STARTF_USESTDHANDLES; - - let cur_proc = GetCurrentProcess(); - - // Similarly to unix, we don't actually leave holes for the stdio file - // descriptors, but rather open up /dev/null equivalents. These - // equivalents are drawn from libuv's windows process spawning. - let set_fd = |fd: &Option, slot: &mut HANDLE, - is_stdin: bool| { - match *fd { - None => { - let access = if is_stdin { - libc::FILE_GENERIC_READ - } else { - libc::FILE_GENERIC_WRITE | libc::FILE_READ_ATTRIBUTES - }; - let size = mem::size_of::(); - let mut sa = libc::SECURITY_ATTRIBUTES { - nLength: size as libc::DWORD, - lpSecurityDescriptor: ptr::null_mut(), - bInheritHandle: 1, - }; - let mut filename: Vec = "NUL".utf16_units().collect(); - filename.push(0); - *slot = libc::CreateFileW(filename.as_ptr(), - access, - libc::FILE_SHARE_READ | - libc::FILE_SHARE_WRITE, - &mut sa, - libc::OPEN_EXISTING, - 0, - ptr::null_mut()); - if *slot == INVALID_HANDLE_VALUE { - return Err(super::last_error()) - } - } - Some(ref fd) => { - let orig = get_osfhandle(fd.fd()) as HANDLE; - if orig == INVALID_HANDLE_VALUE { - return Err(super::last_error()) - } - if DuplicateHandle(cur_proc, orig, cur_proc, slot, - 0, TRUE, DUPLICATE_SAME_ACCESS) == FALSE { - return Err(super::last_error()) - } - } - } - Ok(()) - }; - - try!(set_fd(&in_fd, &mut si.hStdInput, true)); - try!(set_fd(&out_fd, &mut si.hStdOutput, false)); - try!(set_fd(&err_fd, &mut si.hStdError, false)); - - let cmd_str = make_command_line(program.as_ref().unwrap_or(cfg.program), - cfg.args); - let mut pi = zeroed_process_information(); - let mut create_err = None; - - // stolen from the libuv code. - let mut flags = libc::CREATE_UNICODE_ENVIRONMENT; - if cfg.detach { - flags |= libc::DETACHED_PROCESS | libc::CREATE_NEW_PROCESS_GROUP; - } - - with_envp(cfg.env, |envp| { - with_dirp(cfg.cwd, |dirp| { - let mut cmd_str: Vec = cmd_str.as_slice().utf16_units().collect(); - cmd_str.push(0); - let created = CreateProcessW(ptr::null(), - cmd_str.as_mut_ptr(), - ptr::null_mut(), - ptr::null_mut(), - TRUE, - flags, envp, dirp, - &mut si, &mut pi); - if created == FALSE { - create_err = Some(super::last_error()); - } - }) - }); - - assert!(CloseHandle(si.hStdInput) != 0); - assert!(CloseHandle(si.hStdOutput) != 0); - assert!(CloseHandle(si.hStdError) != 0); - - match create_err { - Some(err) => return Err(err), - None => {} - } - - // We close the thread handle because we don't care about keeping the - // thread id valid, and we aren't keeping the thread handle around to be - // able to close it later. We don't close the process handle however - // because std::we want the process id to stay valid at least until the - // calling code closes the process handle. - assert!(CloseHandle(pi.hThread) != 0); - - Ok(SpawnProcessResult { - pid: pi.dwProcessId as pid_t, - handle: pi.hProcess as *mut () - }) - } -} - -#[cfg(windows)] -fn zeroed_startupinfo() -> libc::types::os::arch::extra::STARTUPINFO { - libc::types::os::arch::extra::STARTUPINFO { - cb: 0, - lpReserved: ptr::null_mut(), - lpDesktop: ptr::null_mut(), - lpTitle: ptr::null_mut(), - dwX: 0, - dwY: 0, - dwXSize: 0, - dwYSize: 0, - dwXCountChars: 0, - dwYCountCharts: 0, - dwFillAttribute: 0, - dwFlags: 0, - wShowWindow: 0, - cbReserved2: 0, - lpReserved2: ptr::null_mut(), - hStdInput: libc::INVALID_HANDLE_VALUE, - hStdOutput: libc::INVALID_HANDLE_VALUE, - hStdError: libc::INVALID_HANDLE_VALUE, - } -} - -#[cfg(windows)] -fn zeroed_process_information() -> libc::types::os::arch::extra::PROCESS_INFORMATION { - libc::types::os::arch::extra::PROCESS_INFORMATION { - hProcess: ptr::null_mut(), - hThread: ptr::null_mut(), - dwProcessId: 0, - dwThreadId: 0 - } -} - -#[cfg(windows)] -fn make_command_line(prog: &CString, args: &[CString]) -> String { - let mut cmd = String::new(); - append_arg(&mut cmd, prog.as_str() - .expect("expected program name to be utf-8 encoded")); - for arg in args.iter() { - cmd.push(' '); - append_arg(&mut cmd, arg.as_str() - .expect("expected argument to be utf-8 encoded")); - } - return cmd; - - fn append_arg(cmd: &mut String, arg: &str) { - // If an argument has 0 characters then we need to quote it to ensure - // that it actually gets passed through on the command line or otherwise - // it will be dropped entirely when parsed on the other end. - let quote = arg.chars().any(|c| c == ' ' || c == '\t') || arg.len() == 0; - if quote { - cmd.push('"'); - } - let argvec: Vec = arg.chars().collect(); - for i in range(0u, argvec.len()) { - append_char_at(cmd, argvec.as_slice(), i); - } - if quote { - cmd.push('"'); - } - } - - fn append_char_at(cmd: &mut String, arg: &[char], i: uint) { - match arg[i] { - '"' => { - // Escape quotes. - cmd.push_str("\\\""); - } - '\\' => { - if backslash_run_ends_in_quote(arg, i) { - // Double all backslashes that are in runs before quotes. - cmd.push_str("\\\\"); - } else { - // Pass other backslashes through unescaped. - cmd.push('\\'); - } - } - c => { - cmd.push(c); - } - } - } - - fn backslash_run_ends_in_quote(s: &[char], mut i: uint) -> bool { - while i < s.len() && s[i] == '\\' { - i += 1; - } - return i < s.len() && s[i] == '"'; - } -} - -#[cfg(unix)] -fn spawn_process_os(cfg: ProcessConfig, - in_fd: Option, - out_fd: Option, - err_fd: Option) - -> IoResult -{ - use libc::funcs::posix88::unistd::{fork, dup2, close, chdir, execvp}; - use libc::funcs::bsd44::getdtablesize; - use io::c; - - mod rustrt { - extern { - pub fn rust_unset_sigprocmask(); - } - } - - #[cfg(target_os = "macos")] - unsafe fn set_environ(envp: *const c_void) { - extern { fn _NSGetEnviron() -> *mut *const c_void; } - - *_NSGetEnviron() = envp; - } - #[cfg(not(target_os = "macos"))] - unsafe fn set_environ(envp: *const c_void) { - extern { static mut environ: *const c_void; } - environ = envp; - } - - unsafe fn set_cloexec(fd: c_int) { - let ret = c::ioctl(fd, c::FIOCLEX); - assert_eq!(ret, 0); - } - - let dirp = cfg.cwd.map(|c| c.as_ptr()).unwrap_or(ptr::null()); - - let cfg = unsafe { - mem::transmute::>(cfg) - }; - - with_envp(cfg.env, proc(envp) { - with_argv(cfg.program, cfg.args, proc(argv) unsafe { - let (mut input, mut output) = try!(pipe()); - - // We may use this in the child, so perform allocations before the - // fork - let devnull = "/dev/null".to_c_str(); - - set_cloexec(output.fd()); - - let pid = fork(); - if pid < 0 { - return Err(super::last_error()) - } else if pid > 0 { - drop(output); - let mut bytes = [0, ..4]; - return match input.inner_read(bytes) { - Ok(4) => { - let errno = (bytes[0] as i32 << 24) | - (bytes[1] as i32 << 16) | - (bytes[2] as i32 << 8) | - (bytes[3] as i32 << 0); - - Err(IoError { - code: errno as uint, - detail: None, - extra: 0, - }) - } - Err(..) => { - Ok(SpawnProcessResult { - pid: pid, - handle: ptr::null_mut() - }) - } - Ok(..) => panic!("short read on the cloexec pipe"), - }; - } - // And at this point we've reached a special time in the life of the - // child. The child must now be considered hamstrung and unable to - // do anything other than syscalls really. Consider the following - // scenario: - // - // 1. Thread A of process 1 grabs the malloc() mutex - // 2. Thread B of process 1 forks(), creating thread C - // 3. Thread C of process 2 then attempts to malloc() - // 4. The memory of process 2 is the same as the memory of - // process 1, so the mutex is locked. - // - // This situation looks a lot like deadlock, right? It turns out - // that this is what pthread_atfork() takes care of, which is - // presumably implemented across platforms. The first thing that - // threads to *before* forking is to do things like grab the malloc - // mutex, and then after the fork they unlock it. - // - // Despite this information, libnative's spawn has been witnessed to - // deadlock on both OSX and FreeBSD. I'm not entirely sure why, but - // all collected backtraces point at malloc/free traffic in the - // child spawned process. - // - // For this reason, the block of code below should contain 0 - // invocations of either malloc of free (or their related friends). - // - // As an example of not having malloc/free traffic, we don't close - // this file descriptor by dropping the FileDesc (which contains an - // allocation). Instead we just close it manually. This will never - // have the drop glue anyway because this code never returns (the - // child will either exec() or invoke libc::exit) - let _ = libc::close(input.fd()); - - fn fail(output: &mut file::FileDesc) -> ! { - let errno = os::errno(); - let bytes = [ - (errno >> 24) as u8, - (errno >> 16) as u8, - (errno >> 8) as u8, - (errno >> 0) as u8, - ]; - assert!(output.inner_write(bytes).is_ok()); - unsafe { libc::_exit(1) } - } - - rustrt::rust_unset_sigprocmask(); - - // If a stdio file descriptor is set to be ignored (via a -1 file - // descriptor), then we don't actually close it, but rather open - // up /dev/null into that file descriptor. Otherwise, the first file - // descriptor opened up in the child would be numbered as one of the - // stdio file descriptors, which is likely to wreak havoc. - let setup = |src: Option, dst: c_int| { - let src = match src { - None => { - let flags = if dst == libc::STDIN_FILENO { - libc::O_RDONLY - } else { - libc::O_RDWR - }; - libc::open(devnull.as_ptr(), flags, 0) - } - Some(obj) => { - let fd = obj.fd(); - // Leak the memory and the file descriptor. We're in the - // child now an all our resources are going to be - // cleaned up very soon - mem::forget(obj); - fd - } - }; - src != -1 && retry(|| dup2(src, dst)) != -1 - }; - - if !setup(in_fd, libc::STDIN_FILENO) { fail(&mut output) } - if !setup(out_fd, libc::STDOUT_FILENO) { fail(&mut output) } - if !setup(err_fd, libc::STDERR_FILENO) { fail(&mut output) } - - // close all other fds - for fd in range(3, getdtablesize()).rev() { - if fd != output.fd() { - let _ = close(fd as c_int); - } - } - - match cfg.gid { - Some(u) => { - if libc::setgid(u as libc::gid_t) != 0 { - fail(&mut output); - } - } - None => {} - } - match cfg.uid { - Some(u) => { - // When dropping privileges from root, the `setgroups` call - // will remove any extraneous groups. If we don't call this, - // then even though our uid has dropped, we may still have - // groups that enable us to do super-user things. This will - // fail if we aren't root, so don't bother checking the - // return value, this is just done as an optimistic - // privilege dropping function. - extern { - fn setgroups(ngroups: libc::c_int, - ptr: *const libc::c_void) -> libc::c_int; - } - let _ = setgroups(0, 0 as *const libc::c_void); - - if libc::setuid(u as libc::uid_t) != 0 { - fail(&mut output); - } - } - None => {} - } - if cfg.detach { - // Don't check the error of setsid because it fails if we're the - // process leader already. We just forked so it shouldn't return - // error, but ignore it anyway. - let _ = libc::setsid(); - } - if !dirp.is_null() && chdir(dirp) == -1 { - fail(&mut output); - } - if !envp.is_null() { - set_environ(envp); - } - let _ = execvp(*argv, argv as *mut _); - fail(&mut output); - }) - }) -} - -#[cfg(unix)] -fn with_argv(prog: &CString, args: &[CString], - cb: proc(*const *const libc::c_char) -> T) -> T { - let mut ptrs: Vec<*const libc::c_char> = Vec::with_capacity(args.len()+1); - - // Convert the CStrings into an array of pointers. Note: the - // lifetime of the various CStrings involved is guaranteed to be - // larger than the lifetime of our invocation of cb, but this is - // technically unsafe as the callback could leak these pointers - // out of our scope. - ptrs.push(prog.as_ptr()); - ptrs.extend(args.iter().map(|tmp| tmp.as_ptr())); - - // Add a terminating null pointer (required by libc). - ptrs.push(ptr::null()); - - cb(ptrs.as_ptr()) -} - -#[cfg(unix)] -fn with_envp(env: Option<&[(&CString, &CString)]>, - cb: proc(*const c_void) -> T) -> T { - // On posixy systems we can pass a char** for envp, which is a - // null-terminated array of "k=v\0" strings. Since we must create - // these strings locally, yet expose a raw pointer to them, we - // create a temporary vector to own the CStrings that outlives the - // call to cb. - match env { - Some(env) => { - let mut tmps = Vec::with_capacity(env.len()); - - for pair in env.iter() { - let mut kv = Vec::new(); - kv.push_all(pair.ref0().as_bytes_no_nul()); - kv.push('=' as u8); - kv.push_all(pair.ref1().as_bytes()); // includes terminal \0 - tmps.push(kv); - } - - // As with `with_argv`, this is unsafe, since cb could leak the pointers. - let mut ptrs: Vec<*const libc::c_char> = - tmps.iter() - .map(|tmp| tmp.as_ptr() as *const libc::c_char) - .collect(); - ptrs.push(ptr::null()); - - cb(ptrs.as_ptr() as *const c_void) - } - _ => cb(ptr::null()) - } -} - -#[cfg(windows)] -fn with_envp(env: Option<&[(&CString, &CString)]>, cb: |*mut c_void| -> T) -> T { - // On Windows we pass an "environment block" which is not a char**, but - // rather a concatenation of null-terminated k=v\0 sequences, with a final - // \0 to terminate. - match env { - Some(env) => { - let mut blk = Vec::new(); - - for pair in env.iter() { - let kv = format!("{}={}", - pair.ref0().as_str().unwrap(), - pair.ref1().as_str().unwrap()); - blk.extend(kv.as_slice().utf16_units()); - blk.push(0); - } - - blk.push(0); - - cb(blk.as_mut_ptr() as *mut c_void) - } - _ => cb(ptr::null_mut()) - } -} - -#[cfg(windows)] -fn with_dirp(d: Option<&CString>, cb: |*const u16| -> T) -> T { - match d { - Some(dir) => { - let dir_str = dir.as_str() - .expect("expected workingdirectory to be utf-8 encoded"); - let mut dir_str: Vec = dir_str.utf16_units().collect(); - dir_str.push(0); - cb(dir_str.as_ptr()) - }, - None => cb(ptr::null()) - } -} - -#[cfg(windows)] -fn free_handle(handle: *mut ()) { - assert!(unsafe { - libc::CloseHandle(mem::transmute(handle)) != 0 - }) -} - -#[cfg(unix)] -fn free_handle(_handle: *mut ()) { - // unix has no process handle object, just a pid -} - -#[cfg(unix)] -fn translate_status(status: c_int) -> rtio::ProcessExit { - #![allow(non_snake_case)] - #[cfg(any(target_os = "linux", target_os = "android"))] - mod imp { - pub fn WIFEXITED(status: i32) -> bool { (status & 0xff) == 0 } - pub fn WEXITSTATUS(status: i32) -> i32 { (status >> 8) & 0xff } - pub fn WTERMSIG(status: i32) -> i32 { status & 0x7f } - } - - #[cfg(any(target_os = "macos", - target_os = "ios", - target_os = "freebsd", - target_os = "dragonfly"))] - mod imp { - pub fn WIFEXITED(status: i32) -> bool { (status & 0x7f) == 0 } - pub fn WEXITSTATUS(status: i32) -> i32 { status >> 8 } - pub fn WTERMSIG(status: i32) -> i32 { status & 0o177 } - } - - if imp::WIFEXITED(status) { - rtio::ExitStatus(imp::WEXITSTATUS(status) as int) - } else { - rtio::ExitSignal(imp::WTERMSIG(status) as int) - } -} - -/** - * Waits for a process to exit and returns the exit code, failing - * if there is no process with the specified id. - * - * Note that this is private to avoid race conditions on unix where if - * a user calls waitpid(some_process.get_id()) then some_process.finish() - * and some_process.destroy() and some_process.finalize() will then either - * operate on a none-existent process or, even worse, on a newer process - * with the same id. - */ -#[cfg(windows)] -fn waitpid(pid: pid_t, deadline: u64) -> IoResult { - use libc::types::os::arch::extra::DWORD; - use libc::consts::os::extra::{ - SYNCHRONIZE, - PROCESS_QUERY_INFORMATION, - FALSE, - STILL_ACTIVE, - INFINITE, - WAIT_TIMEOUT, - WAIT_OBJECT_0, - }; - use libc::funcs::extra::kernel32::{ - OpenProcess, - GetExitCodeProcess, - CloseHandle, - WaitForSingleObject, - }; - - unsafe { - let process = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION, - FALSE, - pid as DWORD); - if process.is_null() { - return Err(super::last_error()) - } - - loop { - let mut status = 0; - if GetExitCodeProcess(process, &mut status) == FALSE { - let err = Err(super::last_error()); - assert!(CloseHandle(process) != 0); - return err; - } - if status != STILL_ACTIVE { - assert!(CloseHandle(process) != 0); - return Ok(rtio::ExitStatus(status as int)); - } - let interval = if deadline == 0 { - INFINITE - } else { - let now = ::io::timer::now(); - if deadline < now {0} else {(deadline - now) as u32} - }; - match WaitForSingleObject(process, interval) { - WAIT_OBJECT_0 => {} - WAIT_TIMEOUT => { - assert!(CloseHandle(process) != 0); - return Err(util::timeout("process wait timed out")) - } - _ => { - let err = Err(super::last_error()); - assert!(CloseHandle(process) != 0); - return err - } - } - } - } -} - -#[cfg(unix)] -fn waitpid(pid: pid_t, deadline: u64) -> IoResult { - use std::cmp; - use std::comm; - - static mut WRITE_FD: libc::c_int = 0; - - let mut status = 0 as c_int; - if deadline == 0 { - return match retry(|| unsafe { c::waitpid(pid, &mut status, 0) }) { - -1 => panic!("unknown waitpid error: {}", super::last_error().code), - _ => Ok(translate_status(status)), - } - } - - // On unix, wait() and its friends have no timeout parameters, so there is - // no way to time out a thread in wait(). From some googling and some - // thinking, it appears that there are a few ways to handle timeouts in - // wait(), but the only real reasonable one for a multi-threaded program is - // to listen for SIGCHLD. - // - // With this in mind, the waiting mechanism with a timeout barely uses - // waitpid() at all. There are a few times that waitpid() is invoked with - // WNOHANG, but otherwise all the necessary blocking is done by waiting for - // a SIGCHLD to arrive (and that blocking has a timeout). Note, however, - // that waitpid() is still used to actually reap the child. - // - // Signal handling is super tricky in general, and this is no exception. Due - // to the async nature of SIGCHLD, we use the self-pipe trick to transmit - // data out of the signal handler to the rest of the application. The first - // idea would be to have each thread waiting with a timeout to read this - // output file descriptor, but a write() is akin to a signal(), not a - // broadcast(), so it would only wake up one thread, and possibly the wrong - // thread. Hence a helper thread is used. - // - // The helper thread here is responsible for farming requests for a - // waitpid() with a timeout, and then processing all of the wait requests. - // By guaranteeing that only this helper thread is reading half of the - // self-pipe, we're sure that we'll never lose a SIGCHLD. This helper thread - // is also responsible for select() to wait for incoming messages or - // incoming SIGCHLD messages, along with passing an appropriate timeout to - // select() to wake things up as necessary. - // - // The ordering of the following statements is also very purposeful. First, - // we must be guaranteed that the helper thread is booted and available to - // receive SIGCHLD signals, and then we must also ensure that we do a - // nonblocking waitpid() at least once before we go ask the sigchld helper. - // This prevents the race where the child exits, we boot the helper, and - // then we ask for the child's exit status (never seeing a sigchld). - // - // The actual communication between the helper thread and this thread is - // quite simple, just a channel moving data around. - - HELPER.boot(register_sigchld, waitpid_helper); - - match waitpid_nowait(pid) { - Some(ret) => return Ok(ret), - None => {} - } - - let (tx, rx) = channel(); - HELPER.send(NewChild(pid, tx, deadline)); - return match rx.recv_opt() { - Ok(e) => Ok(e), - Err(()) => Err(util::timeout("wait timed out")), - }; - - // Register a new SIGCHLD handler, returning the reading half of the - // self-pipe plus the old handler registered (return value of sigaction). - // - // Be sure to set up the self-pipe first because as soon as we register a - // handler we're going to start receiving signals. - fn register_sigchld() -> (libc::c_int, c::sigaction) { - unsafe { - let mut pipes = [0, ..2]; - assert_eq!(libc::pipe(pipes.as_mut_ptr()), 0); - util::set_nonblocking(pipes[0], true).ok().unwrap(); - util::set_nonblocking(pipes[1], true).ok().unwrap(); - WRITE_FD = pipes[1]; - - let mut old: c::sigaction = mem::zeroed(); - let mut new: c::sigaction = mem::zeroed(); - new.sa_handler = sigchld_handler; - new.sa_flags = c::SA_NOCLDSTOP; - assert_eq!(c::sigaction(c::SIGCHLD, &new, &mut old), 0); - (pipes[0], old) - } - } - - // Helper thread for processing SIGCHLD messages - fn waitpid_helper(input: libc::c_int, - messages: Receiver, - (read_fd, old): (libc::c_int, c::sigaction)) { - util::set_nonblocking(input, true).ok().unwrap(); - let mut set: c::fd_set = unsafe { mem::zeroed() }; - let mut tv: libc::timeval; - let mut active = Vec::<(libc::pid_t, Sender, u64)>::new(); - let max = cmp::max(input, read_fd) + 1; - - 'outer: loop { - // Figure out the timeout of our syscall-to-happen. If we're waiting - // for some processes, then they'll have a timeout, otherwise we - // wait indefinitely for a message to arrive. - // - // FIXME: sure would be nice to not have to scan the entire array - let min = active.iter().map(|a| *a.ref2()).enumerate().min_by(|p| { - p.val1() - }); - let (p, idx) = match min { - Some((idx, deadline)) => { - let now = ::io::timer::now(); - let ms = if now < deadline {deadline - now} else {0}; - tv = util::ms_to_timeval(ms); - (&mut tv as *mut _, idx) - } - None => (ptr::null_mut(), -1), - }; - - // Wait for something to happen - c::fd_set(&mut set, input); - c::fd_set(&mut set, read_fd); - match unsafe { c::select(max, &mut set, ptr::null_mut(), - ptr::null_mut(), p) } { - // interrupted, retry - -1 if os::errno() == libc::EINTR as int => continue, - - // We read something, break out and process - 1 | 2 => {} - - // Timeout, the pending request is removed - 0 => { - drop(active.remove(idx)); - continue - } - - n => panic!("error in select {} ({})", os::errno(), n), - } - - // Process any pending messages - if drain(input) { - loop { - match messages.try_recv() { - Ok(NewChild(pid, tx, deadline)) => { - active.push((pid, tx, deadline)); - } - Err(comm::Disconnected) => { - assert!(active.len() == 0); - break 'outer; - } - Err(comm::Empty) => break, - } - } - } - - // If a child exited (somehow received SIGCHLD), then poll all - // children to see if any of them exited. - // - // We also attempt to be responsible netizens when dealing with - // SIGCHLD by invoking any previous SIGCHLD handler instead of just - // ignoring any previous SIGCHLD handler. Note that we don't provide - // a 1:1 mapping of our handler invocations to the previous handler - // invocations because we drain the `read_fd` entirely. This is - // probably OK because the kernel is already allowed to coalesce - // simultaneous signals, we're just doing some extra coalescing. - // - // Another point of note is that this likely runs the signal handler - // on a different thread than the one that received the signal. I - // *think* this is ok at this time. - // - // The main reason for doing this is to allow stdtest to run native - // tests as well. Both libgreen and libnative are running around - // with process timeouts, but libgreen should get there first - // (currently libuv doesn't handle old signal handlers). - if drain(read_fd) { - let i: uint = unsafe { mem::transmute(old.sa_handler) }; - if i != 0 { - assert!(old.sa_flags & c::SA_SIGINFO == 0); - (old.sa_handler)(c::SIGCHLD); - } - - // FIXME: sure would be nice to not have to scan the entire - // array... - active.retain(|&(pid, ref tx, _)| { - match waitpid_nowait(pid) { - Some(msg) => { tx.send(msg); false } - None => true, - } - }); - } - } - - // Once this helper thread is done, we re-register the old sigchld - // handler and close our intermediate file descriptors. - unsafe { - assert_eq!(c::sigaction(c::SIGCHLD, &old, ptr::null_mut()), 0); - let _ = libc::close(read_fd); - let _ = libc::close(WRITE_FD); - WRITE_FD = -1; - } - } - - // Drain all pending data from the file descriptor, returning if any data - // could be drained. This requires that the file descriptor is in - // nonblocking mode. - fn drain(fd: libc::c_int) -> bool { - let mut ret = false; - loop { - let mut buf = [0u8, ..1]; - match unsafe { - libc::read(fd, buf.as_mut_ptr() as *mut libc::c_void, - buf.len() as libc::size_t) - } { - n if n > 0 => { ret = true; } - 0 => return true, - -1 if util::wouldblock() => return ret, - n => panic!("bad read {} ({})", os::last_os_error(), n), - } - } - } - - // Signal handler for SIGCHLD signals, must be async-signal-safe! - // - // This function will write to the writing half of the "self pipe" to wake - // up the helper thread if it's waiting. Note that this write must be - // nonblocking because if it blocks and the reader is the thread we - // interrupted, then we'll deadlock. - // - // When writing, if the write returns EWOULDBLOCK then we choose to ignore - // it. At that point we're guaranteed that there's something in the pipe - // which will wake up the other end at some point, so we just allow this - // signal to be coalesced with the pending signals on the pipe. - extern fn sigchld_handler(_signum: libc::c_int) { - let msg = 1i; - match unsafe { - libc::write(WRITE_FD, &msg as *const _ as *const libc::c_void, 1) - } { - 1 => {} - -1 if util::wouldblock() => {} // see above comments - n => panic!("bad error on write fd: {} {}", n, os::errno()), - } - } -} - -fn waitpid_nowait(pid: pid_t) -> Option { - return waitpid_os(pid); - - // This code path isn't necessary on windows - #[cfg(windows)] - fn waitpid_os(_pid: pid_t) -> Option { None } - - #[cfg(unix)] - fn waitpid_os(pid: pid_t) -> Option { - let mut status = 0 as c_int; - match retry(|| unsafe { - c::waitpid(pid, &mut status, c::WNOHANG) - }) { - n if n == pid => Some(translate_status(status)), - 0 => None, - n => panic!("unknown waitpid error `{}`: {}", n, - super::last_error().code), - } - } -} - -#[cfg(test)] -mod tests { - - #[test] #[cfg(windows)] - fn test_make_command_line() { - use std::str; - use std::c_str::CString; - use super::make_command_line; - - fn test_wrapper(prog: &str, args: &[&str]) -> String { - make_command_line(&prog.to_c_str(), - args.iter() - .map(|a| a.to_c_str()) - .collect::>() - .as_slice()) - } - - assert_eq!( - test_wrapper("prog", ["aaa", "bbb", "ccc"]), - "prog aaa bbb ccc".to_string() - ); - - assert_eq!( - test_wrapper("C:\\Program Files\\blah\\blah.exe", ["aaa"]), - "\"C:\\Program Files\\blah\\blah.exe\" aaa".to_string() - ); - assert_eq!( - test_wrapper("C:\\Program Files\\test", ["aa\"bb"]), - "\"C:\\Program Files\\test\" aa\\\"bb".to_string() - ); - assert_eq!( - test_wrapper("echo", ["a b c"]), - "echo \"a b c\"".to_string() - ); - assert_eq!( - test_wrapper("\u03c0\u042f\u97f3\u00e6\u221e", []), - "\u03c0\u042f\u97f3\u00e6\u221e".to_string() - ); - } -} diff --git a/src/libnative/lib.rs b/src/libnative/lib.rs deleted file mode 100644 index ea1136dfe3c..00000000000 --- a/src/libnative/lib.rs +++ /dev/null @@ -1,155 +0,0 @@ -// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 or the MIT license -// , at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -//! The native I/O and threading crate -//! -//! This crate contains an implementation of 1:1 scheduling for a "native" -//! runtime. In addition, all I/O provided by this crate is the thread blocking -//! version of I/O. -//! -//! # Starting with libnative -//! -//! ```rust -//! extern crate native; -//! -//! #[start] -//! fn start(argc: int, argv: *const *const u8) -> int { -//! native::start(argc, argv, main) -//! } -//! -//! fn main() { -//! // this code is running on the main OS thread -//! } -//! ``` -//! -//! # Force spawning a native task -//! -//! ```rust -//! extern crate native; -//! -//! use std::task::TaskBuilder; -//! use native::NativeTaskBuilder; -//! -//! fn main() { -//! // We're not sure whether this main function is run in 1:1 or M:N mode. -//! -//! TaskBuilder::new().native().spawn(proc() { -//! // this code is guaranteed to be run on a native thread -//! }); -//! } -//! ``` - -#![crate_name = "native"] -#![experimental] -#![license = "MIT/ASL2"] -#![crate_type = "rlib"] -#![crate_type = "dylib"] -#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png", - html_favicon_url = "http://www.rust-lang.org/favicon.ico", - html_root_url = "http://doc.rust-lang.org/nightly/")] - -#![deny(unused_results, unused_must_use)] -#![allow(non_camel_case_types)] -#![allow(unknown_features)] -#![feature(default_type_params, lang_items, slicing_syntax, globs)] - -// NB this crate explicitly does *not* allow glob imports, please seriously -// consider whether they're needed before adding that feature here (the -// answer is that you don't need them) -#![feature(macro_rules, unsafe_destructor, default_type_params)] - -extern crate alloc; -extern crate libc; - -use std::os; -use std::rt; -use std::str; - -pub use task::NativeTaskBuilder; - -pub mod task; - -#[cfg(any(windows, android))] -static OS_DEFAULT_STACK_ESTIMATE: uint = 1 << 20; -#[cfg(all(unix, not(android)))] -static OS_DEFAULT_STACK_ESTIMATE: uint = 2 * (1 << 20); - -#[lang = "start"] -#[cfg(not(test))] -pub fn lang_start(main: *const u8, argc: int, argv: *const *const u8) -> int { - use std::mem; - start(argc, argv, proc() { - let main: extern "Rust" fn() = unsafe { mem::transmute(main) }; - main(); - }) -} - -/// Executes the given procedure after initializing the runtime with the given -/// argc/argv. -/// -/// This procedure is guaranteed to run on the thread calling this function, but -/// the stack bounds for this rust task will *not* be set. Care must be taken -/// for this function to not overflow its stack. -/// -/// This function will only return once *all* native threads in the system have -/// exited. -pub fn start(argc: int, argv: *const *const u8, main: proc()) -> int { - let something_around_the_top_of_the_stack = 1; - let addr = &something_around_the_top_of_the_stack as *const int; - let my_stack_top = addr as uint; - - // FIXME #11359 we just assume that this thread has a stack of a - // certain size, and estimate that there's at most 20KB of stack - // frames above our current position. - let my_stack_bottom = my_stack_top + 20000 - OS_DEFAULT_STACK_ESTIMATE; - - // When using libgreen, one of the first things that we do is to turn off - // the SIGPIPE signal (set it to ignore). By default, some platforms will - // send a *signal* when a EPIPE error would otherwise be delivered. This - // runtime doesn't install a SIGPIPE handler, causing it to kill the - // program, which isn't exactly what we want! - // - // Hence, we set SIGPIPE to ignore when the program starts up in order to - // prevent this problem. - #[cfg(windows)] fn ignore_sigpipe() {} - #[cfg(unix)] fn ignore_sigpipe() { - use libc; - use libc::funcs::posix01::signal::signal; - unsafe { - assert!(signal(libc::SIGPIPE, libc::SIG_IGN) != -1); - } - } - ignore_sigpipe(); - - rt::init(argc, argv); - let mut exit_code = None; - let mut main = Some(main); - let mut task = task::new((my_stack_bottom, my_stack_top), - rt::thread::main_guard_page()); - task.name = Some(str::Slice("
")); - drop(task.run(|| { - unsafe { - rt::stack::record_os_managed_stack_bounds(my_stack_bottom, my_stack_top); - } - exit_code = Some(run(main.take().unwrap())); - }).destroy()); - unsafe { rt::cleanup(); } - // If the exit code wasn't set, then the task block must have panicked. - return exit_code.unwrap_or(rt::DEFAULT_ERROR_CODE); -} - -/// Executes a procedure on the current thread in a Rust task context. -/// -/// This function has all of the same details as `start` except for a different -/// number of arguments. -pub fn run(main: proc()) -> int { - main(); - os::get_exit_status() -} diff --git a/src/libnative/task.rs b/src/libnative/task.rs deleted file mode 100644 index 02fb5b31c0d..00000000000 --- a/src/libnative/task.rs +++ /dev/null @@ -1,130 +0,0 @@ -// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT -// file at the top-level directory of this distribution and at -// http://rust-lang.org/COPYRIGHT. -// -// Licensed under the Apache License, Version 2.0 or the MIT license -// , at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -//! Tasks implemented on top of OS threads -//! -//! This module contains the implementation of the 1:1 threading module required -//! by rust tasks. This implements the necessary API traits laid out by std::rt -//! in order to spawn new tasks and deschedule the current task. - -use std::any::Any; -use std::mem; -use std::rt::bookkeeping; -use std::rt::local::Local; -use std::rt::mutex::NativeMutex; -use std::rt::stack; -use std::rt::task::{Task, BlockedTask, TaskOpts}; -use std::rt::thread::Thread; -use std::rt; - -#[cfg(test)] -mod tests { - use std::rt::local::Local; - use std::rt::task::{Task, TaskOpts}; - use std::task; - use std::task::{TaskBuilder, Spawner}; - - use super::{Ops, NativeTaskBuilder, NativeSpawner}; - - #[test] - fn smoke() { - let (tx, rx) = channel(); - spawn(proc() { - tx.send(()); - }); - rx.recv(); - } - - #[test] - fn smoke_panic() { - let (tx, rx) = channel::<()>(); - spawn(proc() { - let _tx = tx; - panic!() - }); - assert_eq!(rx.recv_opt(), Err(())); - } - - #[test] - fn smoke_opts() { - let mut opts = TaskOpts::new(); - opts.name = Some("test".into_maybe_owned()); - opts.stack_size = Some(20 * 4096); - let (tx, rx) = channel(); - opts.on_exit = Some(proc(r) tx.send(r)); - NativeSpawner.spawn(opts, proc() {}); - assert!(rx.recv().is_ok()); - } - - #[test] - fn smoke_opts_panic() { - let mut opts = TaskOpts::new(); - let (tx, rx) = channel(); - opts.on_exit = Some(proc(r) tx.send(r)); - NativeSpawner.spawn(opts, proc() { panic!() }); - assert!(rx.recv().is_err()); - } - - #[test] - fn yield_test() { - let (tx, rx) = channel(); - spawn(proc() { - for _ in range(0u, 10) { task::deschedule(); } - tx.send(()); - }); - rx.recv(); - } - - #[test] - fn spawn_children() { - let (tx1, rx) = channel(); - spawn(proc() { - let (tx2, rx) = channel(); - spawn(proc() { - let (tx3, rx) = channel(); - spawn(proc() { - tx3.send(()); - }); - rx.recv(); - tx2.send(()); - }); - rx.recv(); - tx1.send(()); - }); - rx.recv(); - } - - #[test] - fn spawn_inherits() { - let (tx, rx) = channel(); - TaskBuilder::new().spawner(NativeSpawner).spawn(proc() { - spawn(proc() { - let mut task: Box = Local::take(); - match task.maybe_take_runtime::() { - Some(ops) => { - task.put_runtime(ops); - } - None => panic!(), - } - Local::put(task); - tx.send(()); - }); - }); - rx.recv(); - } - - #[test] - fn test_native_builder() { - let res = TaskBuilder::new().native().try(proc() { - "Success!".to_string() - }); - assert_eq!(res.ok().unwrap(), "Success!".to_string()); - } -} diff --git a/src/librustc_trans/driver/driver.rs b/src/librustc_trans/driver/driver.rs index 98cf779fcd2..b3b68d0c22b 100644 --- a/src/librustc_trans/driver/driver.rs +++ b/src/librustc_trans/driver/driver.rs @@ -198,10 +198,6 @@ pub fn phase_2_configure_and_expand(sess: &Session, *sess.features.borrow_mut() = features; }); - let any_exe = sess.crate_types.borrow().iter().any(|ty| { - *ty == config::CrateTypeExecutable - }); - // strip before expansion to allow macros to depend on // configuration variables e.g/ in // @@ -215,8 +211,7 @@ pub fn phase_2_configure_and_expand(sess: &Session, krate = time(time_passes, "crate injection", krate, |krate| syntax::std_inject::maybe_inject_crates_ref(krate, - sess.opts.alt_std_name.clone(), - any_exe)); + sess.opts.alt_std_name.clone())); let mut addl_plugins = Some(addl_plugins); let Plugins { macros, registrars } diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs index 7f2a4c7e365..70b30997e18 100644 --- a/src/libstd/lib.rs +++ b/src/libstd/lib.rs @@ -248,9 +248,7 @@ #[path = "sys/common/mod.rs"] mod sys_common; -// FIXME #7809: This shouldn't be pub, and it should be reexported under 'unstable' -// but name resolution doesn't work without it being pub. -pub mod rt; +mod rt; mod failure; // A curious inner-module that's not exported that contains the binding diff --git a/src/libstd/rt/mod.rs b/src/libstd/rt/mod.rs index 8701fadf65c..322df17f4f1 100644 --- a/src/libstd/rt/mod.rs +++ b/src/libstd/rt/mod.rs @@ -58,6 +58,7 @@ use failure; use rustrt; +use startup; // Reexport some of our utilities which are expected by other crates. pub use self::util::{default_sched_threads, min_stack, running_on_valgrind}; @@ -86,6 +87,81 @@ pub fn init(argc: int, argv: *const *const u8) { unsafe { unwind::register(failure::on_fail); } } +#[cfg(any(windows, android))] +static OS_DEFAULT_STACK_ESTIMATE: uint = 1 << 20; +#[cfg(all(unix, not(android)))] +static OS_DEFAULT_STACK_ESTIMATE: uint = 2 * (1 << 20); + +#[cfg(not(test))] +#[lang = "start"] +fn lang_start(main: *const u8, argc: int, argv: *const *const u8) -> int { + use std::mem; + start(argc, argv, proc() { + let main: extern "Rust" fn() = unsafe { mem::transmute(main) }; + main(); + }) +} + +/// Executes the given procedure after initializing the runtime with the given +/// argc/argv. +/// +/// This procedure is guaranteed to run on the thread calling this function, but +/// the stack bounds for this rust task will *not* be set. Care must be taken +/// for this function to not overflow its stack. +/// +/// This function will only return once *all* native threads in the system have +/// exited. +pub fn start(argc: int, argv: *const *const u8, main: proc()) -> int { + use prelude::*; + use rt; + use rustrt::task::Task; + use str; + + let something_around_the_top_of_the_stack = 1; + let addr = &something_around_the_top_of_the_stack as *const int; + let my_stack_top = addr as uint; + + // FIXME #11359 we just assume that this thread has a stack of a + // certain size, and estimate that there's at most 20KB of stack + // frames above our current position. + let my_stack_bottom = my_stack_top + 20000 - OS_DEFAULT_STACK_ESTIMATE; + + // When using libgreen, one of the first things that we do is to turn off + // the SIGPIPE signal (set it to ignore). By default, some platforms will + // send a *signal* when a EPIPE error would otherwise be delivered. This + // runtime doesn't install a SIGPIPE handler, causing it to kill the + // program, which isn't exactly what we want! + // + // Hence, we set SIGPIPE to ignore when the program starts up in order to + // prevent this problem. + #[cfg(windows)] fn ignore_sigpipe() {} + #[cfg(unix)] fn ignore_sigpipe() { + use libc; + use libc::funcs::posix01::signal::signal; + unsafe { + assert!(signal(libc::SIGPIPE, libc::SIG_IGN) != -1); + } + } + ignore_sigpipe(); + + init(argc, argv); + let mut exit_code = None; + let mut main = Some(main); + let mut task = task::new((my_stack_bottom, my_stack_top), + rt::thread::main_guard_page()); + task.name = Some(str::Slice("
")); + drop(task.run(|| { + unsafe { + rt::stack::record_os_managed_stack_bounds(my_stack_bottom, my_stack_top); + } + (main.take().unwrap())(); + exit_code = Some(os::get_exit_status()); + }).destroy()); + unsafe { rt::cleanup(); } + // If the exit code wasn't set, then the task block must have panicked. + return exit_code.unwrap_or(rt::DEFAULT_ERROR_CODE); +} + /// One-time runtime cleanup. /// /// This function is unsafe because it performs no checks to ensure that the diff --git a/src/libsyntax/std_inject.rs b/src/libsyntax/std_inject.rs index 6a4ab365a50..e98be046586 100644 --- a/src/libsyntax/std_inject.rs +++ b/src/libsyntax/std_inject.rs @@ -22,10 +22,10 @@ use std::mem; -pub fn maybe_inject_crates_ref(krate: ast::Crate, alt_std_name: Option, any_exe: bool) +pub fn maybe_inject_crates_ref(krate: ast::Crate, alt_std_name: Option) -> ast::Crate { if use_std(&krate) { - inject_crates_ref(krate, alt_std_name, any_exe) + inject_crates_ref(krate, alt_std_name) } else { krate } @@ -43,17 +43,12 @@ fn use_std(krate: &ast::Crate) -> bool { !attr::contains_name(krate.attrs.as_slice(), "no_std") } -fn use_start(krate: &ast::Crate) -> bool { - !attr::contains_name(krate.attrs.as_slice(), "no_start") -} - fn no_prelude(attrs: &[ast::Attribute]) -> bool { attr::contains_name(attrs, "no_implicit_prelude") } struct StandardLibraryInjector<'a> { alt_std_name: Option, - any_exe: bool, } impl<'a> fold::Folder for StandardLibraryInjector<'a> { @@ -80,23 +75,6 @@ fn fold_crate(&mut self, mut krate: ast::Crate) -> ast::Crate { span: DUMMY_SP }); - if use_start(&krate) && self.any_exe { - let visible_rt_name = "rt"; - let actual_rt_name = "native"; - // Gensym the ident so it can't be named - let visible_rt_name = token::gensym_ident(visible_rt_name); - let actual_rt_name = token::intern_and_get_ident(actual_rt_name); - - vis.push(ast::ViewItem { - node: ast::ViewItemExternCrate(visible_rt_name, - Some((actual_rt_name, ast::CookedStr)), - ast::DUMMY_NODE_ID), - attrs: Vec::new(), - vis: ast::Inherited, - span: DUMMY_SP - }); - } - // `extern crate` must be precede `use` items mem::swap(&mut vis, &mut krate.module.view_items); krate.module.view_items.extend(vis.into_iter()); @@ -118,12 +96,9 @@ fn fold_crate(&mut self, mut krate: ast::Crate) -> ast::Crate { } } -fn inject_crates_ref(krate: ast::Crate, - alt_std_name: Option, - any_exe: bool) -> ast::Crate { +fn inject_crates_ref(krate: ast::Crate, alt_std_name: Option) -> ast::Crate { let mut fold = StandardLibraryInjector { alt_std_name: alt_std_name, - any_exe: any_exe, }; fold.fold_crate(krate) }