-
Notifications
You must be signed in to change notification settings - Fork 353
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
implement minimal epoll_create1 shim
- Loading branch information
1 parent
dc029cf
commit 94d41f0
Showing
11 changed files
with
338 additions
and
32 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| use rustc_middle::ty::ScalarInt; | ||
|
|
||
| use crate::{machine::SIGRTMAX, *}; | ||
| use epoll::{Epoll, EpollEvent}; | ||
| use event::Event; | ||
| use socketpair::SocketPair; | ||
|
|
||
| use shims::unix::fs::EvalContextExtPrivate; | ||
|
|
||
| pub mod epoll; | ||
| pub mod event; | ||
| pub mod socketpair; | ||
|
|
||
| impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriInterpCx<'mir, 'tcx> {} | ||
| pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> { | ||
| fn epoll_create1(&mut self, flags: &OpTy<'tcx, Provenance>) -> InterpResult<'tcx, i32> { | ||
| let this = self.eval_context_mut(); | ||
|
|
||
| let flags = this.read_scalar(flags)?.to_i32()?; | ||
|
|
||
| let epoll_cloexec = this.eval_libc_i32("EPOLL_CLOEXEC")?; | ||
| // FIXME handle cloexec | ||
| let _fd_cloexec = this.eval_libc_i32("FD_CLOEXEC")?; | ||
| if flags == epoll_cloexec { | ||
| // FIXME set close on exec, FD_CLOEXEC | ||
| } else if flags != 0 { | ||
| let einval = this.eval_libc("EINVAL")?; | ||
| this.set_last_error(einval)?; | ||
| return Ok(-1); | ||
| } | ||
|
|
||
| let fh = &mut this.machine.file_handler; | ||
| #[allow(clippy::box_default)] | ||
| let fd = fh.insert_fd(Box::new(Epoll::default())); | ||
| Ok(fd) | ||
| } | ||
|
|
||
| fn epoll_ctl( | ||
| &mut self, | ||
| epfd: &OpTy<'tcx, Provenance>, | ||
| op: &OpTy<'tcx, Provenance>, | ||
| fd: &OpTy<'tcx, Provenance>, | ||
| event: &OpTy<'tcx, Provenance>, | ||
| ) -> InterpResult<'tcx, i32> { | ||
| let this = self.eval_context_mut(); | ||
|
|
||
| let values = this.read_scalar(op)?.to_i32()?; | ||
| let epfd = this.read_scalar(epfd)?.to_i32()?; | ||
| let fd = this.read_scalar(fd)?.to_i32()?; | ||
|
|
||
| let epoll_ctl_add = this.eval_libc_i32("EPOLL_CTL_ADD")?; | ||
| let epoll_ctl_mod = this.eval_libc_i32("EPOLL_CTL_MOD")?; | ||
| let epoll_ctl_del = this.eval_libc_i32("EPOLL_CTL_DEL")?; | ||
|
|
||
| if values == epoll_ctl_add || values == epoll_ctl_mod { | ||
| let event = this.deref_operand(event)?; | ||
|
|
||
| let events = this.mplace_field(&event, 0)?; | ||
| let events = this.read_scalar(&events.into())?.to_u32()?; | ||
| let data = this.mplace_field(&event, 1)?; | ||
| let data = this.read_scalar(&data.into())?.to_u64()?; | ||
| let event = EpollEvent { events, data }; | ||
|
|
||
| if let Some(epfd) = this.machine.file_handler.handles.get_mut(&epfd) { | ||
| let epfd = epfd.as_epoll_handle()?; | ||
|
|
||
| epfd.file_descriptors.insert(fd, event); | ||
| Ok(0) | ||
| } else { | ||
| this.handle_not_found() | ||
| } | ||
| } else if values == epoll_ctl_del { | ||
| if let Some(epfd) = this.machine.file_handler.handles.get_mut(&epfd) { | ||
| let epfd = epfd.as_epoll_handle()?; | ||
|
|
||
| epfd.file_descriptors.remove(&fd); | ||
| Ok(0) | ||
| } else { | ||
| this.handle_not_found() | ||
| } | ||
| } else { | ||
| let einval = this.eval_libc("EINVAL")?; | ||
| this.set_last_error(einval)?; | ||
| Ok(-1) | ||
| } | ||
| } | ||
|
|
||
| fn epoll_wait( | ||
| &mut self, | ||
| epfd: &OpTy<'tcx, Provenance>, | ||
| events: &OpTy<'tcx, Provenance>, | ||
| maxevents: &OpTy<'tcx, Provenance>, | ||
| timeout: &OpTy<'tcx, Provenance>, | ||
| ) -> InterpResult<'tcx, i32> { | ||
| let this = self.eval_context_mut(); | ||
|
|
||
| let _epfd = this.read_scalar(epfd)?.to_i32()?; | ||
| let _events = this.read_scalar(events)?; | ||
| let maxevents = this.read_scalar(maxevents)?.to_i32()?; | ||
| let _timeout = this.read_scalar(timeout)?.to_i32()?; | ||
|
|
||
| if maxevents <= 0 { | ||
| throw_ub_format!("maxevents must be greater than 0"); | ||
| } | ||
|
|
||
| throw_ub_format!("closed due to not writing"); | ||
| } | ||
|
|
||
| fn eventfd( | ||
| &mut self, | ||
| val: &OpTy<'tcx, Provenance>, | ||
| flags: &OpTy<'tcx, Provenance>, | ||
| ) -> InterpResult<'tcx, i32> { | ||
| let this = self.eval_context_mut(); | ||
|
|
||
| let val = this.read_scalar(val)?.to_u32()?; | ||
| let flags = this.read_scalar(flags)?.to_i32()?; | ||
|
|
||
| let efd_cloexec = this.eval_libc_i32("EFD_CLOEXEC")?; | ||
| let efd_nonblock = this.eval_libc_i32("EFD_NONBLOCK")?; | ||
| let efd_semaphore = this.eval_libc_i32("EFD_SEMAPHORE")?; | ||
|
|
||
| if flags & (efd_cloexec | efd_nonblock | efd_semaphore) == 0 { | ||
| throw_unsup_format!("{flags} is unsupported"); | ||
| } | ||
| // FIXME handle the cloexec and nonblock flags | ||
| if flags & efd_cloexec != 0 {} | ||
| if flags & efd_nonblock != 0 {} | ||
| if flags & efd_semaphore != 0 { | ||
| throw_unsup_format!("EFD_SEMAPHORE is unsupported"); | ||
| } | ||
|
|
||
| let fh = &mut this.machine.file_handler; | ||
| let fd = fh.insert_fd(Box::new(Event { val })); | ||
| Ok(fd) | ||
| } | ||
|
|
||
| fn socketpair( | ||
| &mut self, | ||
| _domain: &OpTy<'tcx, Provenance>, | ||
| type_: &OpTy<'tcx, Provenance>, | ||
| _protocol: &OpTy<'tcx, Provenance>, | ||
| sv: &OpTy<'tcx, Provenance>, | ||
| ) -> InterpResult<'tcx, i32> { | ||
| let this = self.eval_context_mut(); | ||
|
|
||
| let _flags = this.read_scalar(type_)?.to_i32()?; | ||
| let sv = this.deref_operand(sv)?; | ||
|
|
||
| let fh = &mut this.machine.file_handler; | ||
| let sv0 = fh.insert_fd(Box::new(SocketPair)); | ||
| let sv0 = ScalarInt::try_from_int(sv0, sv.layout.size).unwrap(); | ||
| let sv1 = fh.insert_fd(Box::new(SocketPair)); | ||
| let sv1 = ScalarInt::try_from_int(sv1, sv.layout.size).unwrap(); | ||
|
|
||
| this.write_scalar(sv0, &sv.into())?; | ||
| this.write_scalar(sv1, &sv.offset(sv.layout.size, sv.layout, this)?.into())?; | ||
|
|
||
| Ok(0) | ||
| } | ||
|
|
||
| fn libc_current_sigrtmax(&mut self) -> InterpResult<'tcx, i32> { | ||
| let _this = self.eval_context_mut(); | ||
|
|
||
| Ok(SIGRTMAX) | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| use crate::*; | ||
|
|
||
| use crate::shims::unix::fs::FileDescriptor; | ||
|
|
||
| use rustc_data_structures::fx::FxHashMap; | ||
| use std::io; | ||
|
|
||
| #[derive(Clone, Debug, Default)] | ||
| pub struct Epoll { | ||
| pub file_descriptors: FxHashMap<i32, EpollEvent>, | ||
| } | ||
|
|
||
| #[derive(Clone, Debug)] | ||
| pub struct EpollEvent { | ||
| pub events: u32, | ||
| pub data: u64, | ||
| } | ||
|
|
||
| impl FileDescriptor for Epoll { | ||
| fn name(&self) -> &'static str { | ||
| "epoll" | ||
| } | ||
|
|
||
| fn as_epoll_handle<'tcx>(&mut self) -> InterpResult<'tcx, &mut Epoll> { | ||
| Ok(self) | ||
| } | ||
|
|
||
| fn dup<'tcx>(&mut self) -> io::Result<Box<dyn FileDescriptor>> { | ||
| Ok(Box::new(self.clone())) | ||
| } | ||
|
|
||
| fn is_tty(&self) -> bool { | ||
| false | ||
| } | ||
|
|
||
| fn close<'tcx>( | ||
| self: Box<Self>, | ||
| _communicate_allowed: bool, | ||
| ) -> InterpResult<'tcx, io::Result<i32>> { | ||
| Ok(Ok(0)) | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| use crate::shims::unix::fs::FileDescriptor; | ||
|
|
||
| use rustc_const_eval::interpret::InterpResult; | ||
|
|
||
| use std::io; | ||
|
|
||
| #[derive(Debug)] | ||
| pub struct Event { | ||
| pub val: u32, | ||
| } | ||
|
|
||
| impl FileDescriptor for Event { | ||
| fn name(&self) -> &'static str { | ||
| "event" | ||
| } | ||
|
|
||
| fn dup<'tcx>(&mut self) -> io::Result<Box<dyn FileDescriptor>> { | ||
| Ok(Box::new(Event { val: self.val })) | ||
| } | ||
|
|
||
| fn is_tty(&self) -> bool { | ||
| false | ||
| } | ||
|
|
||
| fn write<'tcx>( | ||
| &self, | ||
| _communicate_allowed: bool, | ||
| bytes: &[u8], | ||
| ) -> InterpResult<'tcx, io::Result<usize>> { | ||
| throw_unsup_format!("cannot write to {}, {:?}", self.name(), bytes); | ||
| } | ||
|
|
||
| fn close<'tcx>( | ||
| self: Box<Self>, | ||
| _communicate_allowed: bool, | ||
| ) -> InterpResult<'tcx, io::Result<i32>> { | ||
| Ok(Ok(0)) | ||
| } | ||
| } |
Oops, something went wrong.