Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

18 files changed, 2716 insertions, 0 deletions

diff --git a/third_party/rust/fuchsia-zircon/src/channel.rs b/third_party/rust/fuchsia-zircon/src/channel.rs
new file mode 100644
index 0000000000..44ffc6cd9c
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/channel.rs
@@ -0,0 +1,418 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon channel objects.
+
+use {AsHandleRef, HandleBased, Handle, HandleRef, Peered, Status, Time, usize_into_u32, size_to_u32_sat};
+use {sys, ok};
+use std::mem;
+
+/// An object representing a Zircon
+/// [channel](https://fuchsia.googlesource.com/zircon/+/master/docs/objects/channel.md).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq, Hash)]
+pub struct Channel(Handle);
+impl_handle_based!(Channel);
+impl Peered for Channel {}
+
+impl Channel {
+    /// Create a channel, resulting an a pair of `Channel` objects representing both
+    /// sides of the channel. Messages written into one maybe read from the opposite.
+    ///
+    /// Wraps the
+    /// [zx_channel_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/channel_create.md)
+    /// syscall.
+    pub fn create() -> Result<(Channel, Channel), Status> {
+        unsafe {
+            let mut handle0 = 0;
+            let mut handle1 = 0;
+            let opts = 0;
+            ok(sys::zx_channel_create(opts, &mut handle0, &mut handle1))?;
+            Ok((
+                Self::from(Handle::from_raw(handle0)),
+                Self::from(Handle::from_raw(handle1))
+                ))
+        }
+    }
+
+    /// Read a message from a channel. Wraps the
+    /// [zx_channel_read](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/channel_read.md)
+    /// syscall.
+    ///
+    /// If the `MessageBuf` lacks the capacity to hold the pending message,
+    /// returns an `Err` with the number of bytes and number of handles needed.
+    /// Otherwise returns an `Ok` with the result as usual.
+    pub fn read_raw(&self, buf: &mut MessageBuf)
+        -> Result<Result<(), Status>, (usize, usize)>
+    {
+        let opts = 0;
+        unsafe {
+            buf.clear();
+            let raw_handle = self.raw_handle();
+            let mut num_bytes: u32 = size_to_u32_sat(buf.bytes.capacity());
+            let mut num_handles: u32 = size_to_u32_sat(buf.handles.capacity());
+            let status = ok(sys::zx_channel_read(raw_handle, opts,
+                buf.bytes.as_mut_ptr(), buf.handles.as_mut_ptr() as *mut _,
+                num_bytes, num_handles, &mut num_bytes, &mut num_handles));
+            if status == Err(Status::BUFFER_TOO_SMALL) {
+                Err((num_bytes as usize, num_handles as usize))
+            } else {
+                Ok(status.map(|()| {
+                    buf.bytes.set_len(num_bytes as usize);
+                    buf.handles.set_len(num_handles as usize);
+                }))
+            }
+        }
+    }
+
+    /// Read a message from a channel.
+    ///
+    /// Note that this method can cause internal reallocations in the `MessageBuf`
+    /// if it is lacks capacity to hold the full message. If such reallocations
+    /// are not desirable, use `read_raw` instead.
+    pub fn read(&self, buf: &mut MessageBuf) -> Result<(), Status> {
+        loop {
+            match self.read_raw(buf) {
+                Ok(result) => return result,
+                Err((num_bytes, num_handles)) => {
+                    buf.ensure_capacity_bytes(num_bytes);
+                    buf.ensure_capacity_handles(num_handles);
+                }
+            }
+        }
+    }
+
+    /// Write a message to a channel. Wraps the
+    /// [zx_channel_write](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/channel_write.md)
+    /// syscall.
+    pub fn write(&self, bytes: &[u8], handles: &mut Vec<Handle>)
+            -> Result<(), Status>
+    {
+        let opts = 0;
+        let n_bytes = try!(usize_into_u32(bytes.len()).map_err(|_| Status::OUT_OF_RANGE));
+        let n_handles = try!(usize_into_u32(handles.len()).map_err(|_| Status::OUT_OF_RANGE));
+        unsafe {
+            let status = sys::zx_channel_write(self.raw_handle(), opts, bytes.as_ptr(), n_bytes,
+                handles.as_ptr() as *const sys::zx_handle_t, n_handles);
+            ok(status)?;
+            // Handles were successfully transferred, forget them on sender side
+            handles.set_len(0);
+            Ok(())
+        }
+    }
+
+    /// Send a message consisting of the given bytes and handles to a channel and await a reply. The
+    /// bytes should start with a four byte 'txid' which is used to identify the matching reply.
+    ///
+    /// Wraps the
+    /// [zx_channel_call](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/channel_call.md)
+    /// syscall.
+    ///
+    /// Note that unlike [`read`][read], the caller must ensure that the MessageBuf has enough
+    /// capacity for the bytes and handles which will be received, as replies which are too large
+    /// are discarded.
+    ///
+    /// On failure returns the both the main and read status.
+    ///
+    /// [read]: struct.Channel.html#method.read
+    pub fn call(&self, timeout: Time, bytes: &[u8], handles: &mut Vec<Handle>,
+        buf: &mut MessageBuf) -> Result<(), (Status, Status)>
+    {
+        let write_num_bytes = try!(usize_into_u32(bytes.len()).map_err(
+            |_| (Status::OUT_OF_RANGE, Status::OK)));
+        let write_num_handles = try!(usize_into_u32(handles.len()).map_err(
+            |_| (Status::OUT_OF_RANGE, Status::OK)));
+        buf.clear();
+        let read_num_bytes: u32 = size_to_u32_sat(buf.bytes.capacity());
+        let read_num_handles: u32 = size_to_u32_sat(buf.handles.capacity());
+        let args = sys::zx_channel_call_args_t {
+            wr_bytes: bytes.as_ptr(),
+            wr_handles: handles.as_ptr() as *const sys::zx_handle_t,
+            rd_bytes: buf.bytes.as_mut_ptr(),
+            rd_handles: buf.handles.as_mut_ptr() as *mut _,
+            wr_num_bytes: write_num_bytes,
+            wr_num_handles: write_num_handles,
+            rd_num_bytes: read_num_bytes,
+            rd_num_handles: read_num_handles,
+        };
+        let mut actual_read_bytes: u32 = 0;
+        let mut actual_read_handles: u32 = 0;
+        let mut read_status = Status::OK.into_raw();
+        let options = 0;
+        let status = unsafe {
+            Status::from_raw(
+                sys::zx_channel_call(
+                    self.raw_handle(), options, timeout.nanos(), &args, &mut actual_read_bytes,
+                    &mut actual_read_handles, &mut read_status))
+        };
+
+        match status {
+            Status::OK |
+            Status::TIMED_OUT |
+            Status::CALL_FAILED => {
+                // Handles were successfully transferred,
+                // even if we didn't get a response, so forget
+                // them on the sender side.
+                unsafe { handles.set_len(0); }
+            }
+            _ => {}
+        }
+
+        unsafe {
+            buf.bytes.set_len(actual_read_bytes as usize);
+            buf.handles.set_len(actual_read_handles as usize);
+        }
+        if Status::OK == status {
+            Ok(())
+        } else {
+            Err((status, Status::from_raw(read_status)))
+        }
+    }
+}
+
+#[test]
+pub fn test_handle_repr() {
+    assert_eq!(::std::mem::size_of::<sys::zx_handle_t>(), 4);
+    assert_eq!(::std::mem::size_of::<Handle>(), 4);
+    assert_eq!(::std::mem::align_of::<sys::zx_handle_t>(), ::std::mem::align_of::<Handle>());
+
+    // This test asserts that repr(transparent) still works for Handle -> zx_handle_t
+
+    let n: Vec<sys::zx_handle_t> = vec![0, 100, 2<<32-1];
+    let v: Vec<Handle> = n.iter().map(|h| unsafe { Handle::from_raw(*h) } ).collect();
+
+    for (handle, raw) in v.iter().zip(n.iter()) {
+        unsafe {
+            assert_eq!(*(handle as *const _ as *const [u8; 4]), *(raw as *const _ as *const [u8; 4]));
+        }
+    }
+
+    for h in v.into_iter() {
+        ::std::mem::forget(h);
+    }
+}
+
+impl AsRef<Channel> for Channel {
+    fn as_ref(&self) -> &Self {
+        &self
+    }
+}
+
+/// A buffer for _receiving_ messages from a channel.
+///
+/// A `MessageBuf` is essentially a byte buffer and a vector of
+/// handles, but move semantics for "taking" handles requires special handling.
+///
+/// Note that for sending messages to a channel, the caller manages the buffers,
+/// using a plain byte slice and `Vec<Handle>`.
+#[derive(Default)]
+#[derive(Debug)]
+pub struct MessageBuf {
+    bytes: Vec<u8>,
+    handles: Vec<Handle>,
+}
+
+impl MessageBuf {
+    /// Create a new, empty, message buffer.
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    /// Create a new non-empty message buffer.
+    pub fn new_with(v: Vec<u8>, h: Vec<Handle>) -> Self {
+        Self{
+            bytes: v,
+            handles: h,
+        }
+    }
+
+    /// Ensure that the buffer has the capacity to hold at least `n_bytes` bytes.
+    pub fn ensure_capacity_bytes(&mut self, n_bytes: usize) {
+        ensure_capacity(&mut self.bytes, n_bytes);
+    }
+
+    /// Ensure that the buffer has the capacity to hold at least `n_handles` handles.
+    pub fn ensure_capacity_handles(&mut self, n_handles: usize) {
+        ensure_capacity(&mut self.handles, n_handles);
+    }
+
+    /// Ensure that at least n_bytes bytes are initialized (0 fill).
+    pub fn ensure_initialized_bytes(&mut self, n_bytes: usize) {
+        if n_bytes <= self.bytes.len() {
+            return;
+        }
+        self.bytes.resize(n_bytes, 0);
+    }
+
+    /// Get a reference to the bytes of the message buffer, as a `&[u8]` slice.
+    pub fn bytes(&self) -> &[u8] {
+        self.bytes.as_slice()
+    }
+
+    /// The number of handles in the message buffer. Note this counts the number
+    /// available when the message was received; `take_handle` does not affect
+    /// the count.
+    pub fn n_handles(&self) -> usize {
+        self.handles.len()
+    }
+
+    /// Take the handle at the specified index from the message buffer. If the
+    /// method is called again with the same index, it will return `None`, as
+    /// will happen if the index exceeds the number of handles available.
+    pub fn take_handle(&mut self, index: usize) -> Option<Handle> {
+        self.handles.get_mut(index).and_then(|handle|
+            if handle.is_invalid() {
+                None
+            } else {
+                Some(mem::replace(handle, Handle::invalid()))
+            }
+        )
+    }
+
+    /// Clear the bytes and handles contained in the buf. This will drop any
+    /// contained handles, resulting in their resources being freed.
+    pub fn clear(&mut self) {
+        self.bytes.clear();
+        self.handles.clear();
+    }
+}
+
+fn ensure_capacity<T>(vec: &mut Vec<T>, size: usize) {
+    let len = vec.len();
+    if size > len {
+        vec.reserve(size - len);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use {DurationNum, Rights, Signals, Vmo};
+    use std::thread;
+
+    #[test]
+    fn channel_basic() {
+        let (p1, p2) = Channel::create().unwrap();
+
+        let mut empty = vec![];
+        assert!(p1.write(b"hello", &mut empty).is_ok());
+
+        let mut buf = MessageBuf::new();
+        assert!(p2.read(&mut buf).is_ok());
+        assert_eq!(buf.bytes(), b"hello");
+    }
+
+    #[test]
+    fn channel_read_raw_too_small() {
+        let (p1, p2) = Channel::create().unwrap();
+
+        let mut empty = vec![];
+        assert!(p1.write(b"hello", &mut empty).is_ok());
+
+        let mut buf = MessageBuf::new();
+        let result = p2.read_raw(&mut buf);
+        assert_eq!(result, Err((5, 0)));
+        assert_eq!(buf.bytes(), b"");
+    }
+
+    #[test]
+    fn channel_send_handle() {
+        let hello_length: usize = 5;
+
+        // Create a pair of channels and a virtual memory object.
+        let (p1, p2) = Channel::create().unwrap();
+        let vmo = Vmo::create(hello_length as u64).unwrap();
+
+        // Duplicate VMO handle and send it down the channel.
+        let duplicate_vmo_handle = vmo.duplicate_handle(Rights::SAME_RIGHTS).unwrap().into();
+        let mut handles_to_send: Vec<Handle> = vec![duplicate_vmo_handle];
+        assert!(p1.write(b"", &mut handles_to_send).is_ok());
+        // Handle should be removed from vector.
+        assert!(handles_to_send.is_empty());
+
+        // Read the handle from the receiving channel.
+        let mut buf = MessageBuf::new();
+        assert!(p2.read(&mut buf).is_ok());
+        assert_eq!(buf.n_handles(), 1);
+        // Take the handle from the buffer.
+        let received_handle = buf.take_handle(0).unwrap();
+        // Should not affect number of handles.
+        assert_eq!(buf.n_handles(), 1);
+        // Trying to take it again should fail.
+        assert!(buf.take_handle(0).is_none());
+
+        // Now to test that we got the right handle, try writing something to it...
+        let received_vmo = Vmo::from(received_handle);
+        assert_eq!(received_vmo.write(b"hello", 0).unwrap(), hello_length);
+
+        // ... and reading it back from the original VMO.
+        let mut read_vec = vec![0; hello_length];
+        assert_eq!(vmo.read(&mut read_vec, 0).unwrap(), hello_length);
+        assert_eq!(read_vec, b"hello");
+    }
+
+    #[test]
+    fn channel_call_timeout() {
+        let ten_ms = 10.millis();
+
+        // Create a pair of channels and a virtual memory object.
+        let (p1, p2) = Channel::create().unwrap();
+        let vmo = Vmo::create(0 as u64).unwrap();
+
+        // Duplicate VMO handle and send it along with the call.
+        let duplicate_vmo_handle = vmo.duplicate_handle(Rights::SAME_RIGHTS).unwrap().into();
+        let mut handles_to_send: Vec<Handle> = vec![duplicate_vmo_handle];
+        let mut buf = MessageBuf::new();
+        assert_eq!(p1.call(ten_ms.after_now(), b"call", &mut handles_to_send, &mut buf),
+            Err((Status::TIMED_OUT, Status::OK)));
+        // Handle should be removed from vector even though we didn't get a response, as it was
+        // still sent over the channel.
+        assert!(handles_to_send.is_empty());
+
+        // Should be able to read call even though it timed out waiting for a response.
+        let mut buf = MessageBuf::new();
+        assert!(p2.read(&mut buf).is_ok());
+        assert_eq!(buf.bytes(), b"call");
+        assert_eq!(buf.n_handles(), 1);
+    }
+
+    #[test]
+    fn channel_call() {
+        // Create a pair of channels
+        let (p1, p2) = Channel::create().unwrap();
+
+        // create an mpsc channel for communicating the call data for later assertion
+        let (tx, rx) = ::std::sync::mpsc::channel();
+
+        // Start a new thread to respond to the call.
+        thread::spawn(move || {
+            let mut buf = MessageBuf::new();
+            // if either the read or the write fail, this thread will panic,
+            // resulting in tx being dropped, which will be noticed by the rx.
+            p2.wait_handle(Signals::CHANNEL_READABLE, 1.seconds().after_now()).expect("callee wait error");
+            p2.read(&mut buf).expect("callee read error");
+            p2.write(b"txidresponse", &mut vec![]).expect("callee write error");
+            tx.send(buf).expect("callee mpsc send error");
+        });
+
+        // Make the call.
+        let mut buf = MessageBuf::new();
+        buf.ensure_capacity_bytes(12);
+        // NOTE(raggi): CQ has been seeing some long stalls from channel call,
+        // and it's as yet unclear why. The timeout here has been made much
+        // larger in order to avoid that, as the issues are not issues with this
+        // crate's concerns. The timeout is here just to prevent the tests from
+        // stalling forever if a developer makes a mistake locally in this
+        // crate. Tests of Zircon behavior or virtualization behavior should be
+        // covered elsewhere. See ZX-1324.
+        p1.call(30.seconds().after_now(), b"txidcall", &mut vec![], &mut buf).expect("channel call error");
+        assert_eq!(buf.bytes(), b"txidresponse");
+        assert_eq!(buf.n_handles(), 0);
+
+        let sbuf = rx.recv().expect("mpsc channel recv error");
+        assert_eq!(sbuf.bytes(), b"txidcall");
+        assert_eq!(sbuf.n_handles(), 0);
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/cprng.rs b/third_party/rust/fuchsia-zircon/src/cprng.rs
new file mode 100644
index 0000000000..433ed26d9e
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/cprng.rs
@@ -0,0 +1,68 @@
+use {Status, ok, sys};
+
+/// Draw random bytes from the kernel's CPRNG to fill the given buffer. Returns the actual number of
+/// bytes drawn, which may sometimes be less than the size of the buffer provided.
+///
+/// The buffer must have length less than `ZX_CPRNG_DRAW_MAX_LEN`.
+///
+/// Wraps the
+/// [zx_cprng_draw](https://fuchsia.googlesource.com/zircon/+/HEAD/docs/syscalls/cprng_draw.md)
+/// syscall.
+pub fn cprng_draw(buffer: &mut [u8]) -> Result<usize, Status> {
+    let mut actual = 0;
+    let status = unsafe { sys::zx_cprng_draw(buffer.as_mut_ptr(), buffer.len(), &mut actual) };
+    ok(status).map(|()| actual)
+}
+
+/// Mix the given entropy into the kernel CPRNG.
+///
+/// The buffer must have length less than `ZX_CPRNG_ADD_ENTROPY_MAX_LEN`.
+///
+/// Wraps the
+/// [zx_cprng_add_entropy](https://fuchsia.googlesource.com/zircon/+/HEAD/docs/syscalls/cprng_add_entropy.md)
+/// syscall.
+pub fn cprng_add_entropy(buffer: &[u8]) -> Result<(), Status> {
+    let status = unsafe { sys::zx_cprng_add_entropy(buffer.as_ptr(), buffer.len()) };
+    ok(status)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn cprng() {
+        let mut buffer = [0; 20];
+        assert_eq!(cprng_draw(&mut buffer), Ok(20));
+        let mut first_zero = 0;
+        let mut last_zero = 0;
+        for _ in 0..30 {
+            let mut buffer = [0; 20];
+            assert_eq!(cprng_draw(&mut buffer), Ok(20));
+            if buffer[0] == 0 {
+                first_zero += 1;
+            }
+            if buffer[19] == 0 {
+                last_zero += 1;
+            }
+        }
+        assert_ne!(first_zero, 30);
+        assert_ne!(last_zero, 30);
+    }
+
+    #[test]
+    fn cprng_too_large() {
+        let mut buffer = [0; sys::ZX_CPRNG_DRAW_MAX_LEN + 1];
+        assert_eq!(cprng_draw(&mut buffer), Err(Status::INVALID_ARGS));
+
+        for mut s in buffer.chunks_mut(sys::ZX_CPRNG_DRAW_MAX_LEN) {
+            assert_eq!(cprng_draw(&mut s), Ok(s.len()));
+        }
+    }
+
+    #[test]
+    fn cprng_add() {
+        let buffer = [0, 1, 2];
+        assert_eq!(cprng_add_entropy(&buffer), Ok(()));
+    }
+}
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/event.rs b/third_party/rust/fuchsia-zircon/src/event.rs
new file mode 100644
index 0000000000..533a8aafcc
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/event.rs
@@ -0,0 +1,32 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon event objects.
+
+use {AsHandleRef, Cookied, HandleBased, Handle, HandleRef, Status};
+use {sys, ok};
+
+/// An object representing a Zircon
+/// [event object](https://fuchsia.googlesource.com/zircon/+/master/docs/objects/event.md).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Event(Handle);
+impl_handle_based!(Event);
+impl Cookied for Event {}
+
+impl Event {
+    /// Create an event object, an object which is signalable but nothing else. Wraps the
+    /// [zx_event_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/event_create.md)
+    /// syscall.
+    pub fn create() -> Result<Event, Status> {
+        let mut out = 0;
+        let opts = 0;
+        let status = unsafe { sys::zx_event_create(opts, &mut out) };
+        ok(status)?;
+        unsafe {
+            Ok(Self::from(Handle::from_raw(out)))
+        }
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/eventpair.rs b/third_party/rust/fuchsia-zircon/src/eventpair.rs
new file mode 100644
index 0000000000..6f2d29806d
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/eventpair.rs
@@ -0,0 +1,65 @@
+// Copyright 2016 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon event pairs.
+
+use {AsHandleRef, Cookied, HandleBased, Handle, HandleRef, Peered, Status};
+use {sys, ok};
+
+/// An object representing a Zircon
+/// [event pair](https://fuchsia.googlesource.com/zircon/+/master/docs/concepts.md#Other-IPC_Events_Event-Pairs_and-User-Signals).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct EventPair(Handle);
+impl_handle_based!(EventPair);
+impl Peered for EventPair {}
+impl Cookied for EventPair {}
+
+impl EventPair {
+    /// Create an event pair, a pair of objects which can signal each other. Wraps the
+    /// [zx_eventpair_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/eventpair_create.md)
+    /// syscall.
+    pub fn create() -> Result<(EventPair, EventPair), Status> {
+        let mut out0 = 0;
+        let mut out1 = 0;
+        let options = 0;
+        let status = unsafe { sys::zx_eventpair_create(options, &mut out0, &mut out1) };
+        ok(status)?;
+        unsafe {
+            Ok((
+                Self::from(Handle::from_raw(out0)),
+                Self::from(Handle::from_raw(out1))
+            ))
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use {DurationNum, Signals};
+
+    #[test]
+    fn wait_and_signal_peer() {
+        let (p1, p2) = EventPair::create().unwrap();
+        let eighty_ms = 80.millis();
+
+        // Waiting on one without setting any signal should time out.
+        assert_eq!(p2.wait_handle(Signals::USER_0, eighty_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // If we set a signal, we should be able to wait for it.
+        assert!(p1.signal_peer(Signals::NONE, Signals::USER_0).is_ok());
+        assert_eq!(p2.wait_handle(Signals::USER_0, eighty_ms.after_now()).unwrap(),
+            Signals::USER_0);
+
+        // Should still work, signals aren't automatically cleared.
+        assert_eq!(p2.wait_handle(Signals::USER_0, eighty_ms.after_now()).unwrap(),
+            Signals::USER_0);
+
+        // Now clear it, and waiting should time out again.
+        assert!(p1.signal_peer(Signals::USER_0, Signals::NONE).is_ok());
+        assert_eq!(p2.wait_handle(Signals::USER_0, eighty_ms.after_now()), Err(Status::TIMED_OUT));
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/fifo.rs b/third_party/rust/fuchsia-zircon/src/fifo.rs
new file mode 100644
index 0000000000..20af6f5236
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/fifo.rs
@@ -0,0 +1,98 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon fifo objects.
+
+use {AsHandleRef, HandleBased, Handle, HandleRef, Status};
+use {sys, ok};
+
+/// An object representing a Zircon fifo.
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Fifo(Handle);
+impl_handle_based!(Fifo);
+
+impl Fifo {
+    /// Create a pair of fifos and return their endpoints. Writing to one endpoint enqueues an
+    /// element into the fifo from which the opposing endpoint reads. Wraps the
+    /// [zx_fifo_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/fifo_create.md)
+    /// syscall.
+    pub fn create(elem_count: u32, elem_size: u32)
+        -> Result<(Fifo, Fifo), Status>
+    {
+        let mut out0 = 0;
+        let mut out1 = 0;
+        let options = 0;
+        let status = unsafe {
+            sys::zx_fifo_create(elem_count, elem_size, options, &mut out0, &mut out1)
+        };
+        ok(status)?;
+        unsafe { Ok((
+            Self::from(Handle::from_raw(out0)),
+            Self::from(Handle::from_raw(out1))
+        ))}
+    }
+
+    /// Attempts to write some number of elements into the fifo. The number of bytes written will be
+    /// rounded down to a multiple of the fifo's element size.
+    /// Return value (on success) is number of elements actually written.
+    ///
+    /// Wraps
+    /// [zx_fifo_write](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/fifo_write.md).
+    pub fn write(&self, bytes: &[u8]) -> Result<u32, Status> {
+        let mut num_entries_written = 0;
+        let status = unsafe {
+            sys::zx_fifo_write(self.raw_handle(), bytes.as_ptr(), bytes.len(),
+                &mut num_entries_written)
+        };
+        ok(status).map(|()| num_entries_written)
+    }
+
+    /// Attempts to read some number of elements out of the fifo. The number of bytes read will
+    /// always be a multiple of the fifo's element size.
+    /// Return value (on success) is number of elements actually read.
+    ///
+    /// Wraps
+    /// [zx_fifo_read](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/fifo_read.md).
+    pub fn read(&self, bytes: &mut [u8]) -> Result<u32, Status> {
+        let mut num_entries_read = 0;
+        let status = unsafe {
+            sys::zx_fifo_read(self.raw_handle(), bytes.as_mut_ptr(), bytes.len(),
+                &mut num_entries_read)
+        };
+        ok(status).map(|()| num_entries_read)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn fifo_basic() {
+        let (fifo1, fifo2) = Fifo::create(4, 2).unwrap();
+
+        // Trying to write less than one element should fail.
+        assert_eq!(fifo1.write(b""), Err(Status::OUT_OF_RANGE));
+        assert_eq!(fifo1.write(b"h"), Err(Status::OUT_OF_RANGE));
+
+        // Should write one element "he" and ignore the last half-element as it rounds down.
+        assert_eq!(fifo1.write(b"hex").unwrap(), 1);
+
+        // Should write three elements "ll" "o " "wo" and drop the rest as it is full.
+        assert_eq!(fifo1.write(b"llo worlds").unwrap(), 3);
+
+        // Now that the fifo is full any further attempts to write should fail.
+        assert_eq!(fifo1.write(b"blah blah"), Err(Status::SHOULD_WAIT));
+
+        // Read all 4 entries from the other end.
+        let mut read_vec = vec![0; 8];
+        assert_eq!(fifo2.read(&mut read_vec).unwrap(), 4);
+        assert_eq!(read_vec, b"hello wo");
+
+        // Reading again should fail as the fifo is empty.
+        assert_eq!(fifo2.read(&mut read_vec), Err(Status::SHOULD_WAIT));
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/handle.rs b/third_party/rust/fuchsia-zircon/src/handle.rs
new file mode 100644
index 0000000000..5c50f29f0e
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/handle.rs
@@ -0,0 +1,243 @@
+use {Port, Rights, Signals, Status, Time, WaitAsyncOpts, ok, sys};
+use std::marker::PhantomData;
+use std::mem;
+
+/// An object representing a Zircon
+/// [handle](https://fuchsia.googlesource.com/zircon/+/master/docs/handles.md).
+///
+/// Internally, it is represented as a 32-bit integer, but this wrapper enforces
+/// strict ownership semantics. The `Drop` implementation closes the handle.
+///
+/// This type represents the most general reference to a kernel object, and can
+/// be interconverted to and from more specific types. Those conversions are not
+/// enforced in the type system; attempting to use them will result in errors
+/// returned by the kernel. These conversions don't change the underlying
+/// representation, but do change the type and thus what operations are available.
+#[derive(Debug, Eq, PartialEq, Hash)]
+pub struct Handle(sys::zx_handle_t);
+
+impl AsHandleRef for Handle {
+    fn as_handle_ref(&self) -> HandleRef {
+        HandleRef { handle: self.0, phantom: Default::default() }
+    }
+}
+
+impl HandleBased for Handle {}
+
+impl Drop for Handle {
+    fn drop(&mut self) {
+        if self.0 != sys::ZX_HANDLE_INVALID {
+            unsafe { sys::zx_handle_close(self.0) };
+        }
+    }
+}
+
+impl Handle {
+    /// Initialize a handle backed by ZX_HANDLE_INVALID, the only safe non-handle.
+    pub fn invalid() -> Handle {
+        Handle(sys::ZX_HANDLE_INVALID)
+    }
+
+    /// If a raw handle is obtained from some other source, this method converts
+    /// it into a type-safe owned handle.
+    pub unsafe fn from_raw(raw: sys::zx_handle_t) -> Handle {
+        Handle(raw)
+    }
+
+    pub fn is_invalid(&self) -> bool {
+        self.0 == sys::ZX_HANDLE_INVALID
+    }
+
+    pub fn replace(self, rights: Rights) -> Result<Handle, Status> {
+        let handle = self.0;
+        let mut out = 0;
+        let status = unsafe { sys::zx_handle_replace(handle, rights.bits(), &mut out) };
+        ok(status).map(|()| Handle(out))
+    }
+}
+
+/// A borrowed reference to a `Handle`.
+///
+/// Mostly useful as part of a `WaitItem`.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+pub struct HandleRef<'a> {
+    handle: sys::zx_handle_t,
+    phantom: PhantomData<&'a sys::zx_handle_t>,
+}
+
+impl<'a> HandleRef<'a> {
+    pub fn raw_handle(&self) -> sys::zx_handle_t {
+        self.handle
+    }
+
+    pub fn duplicate(&self, rights: Rights) -> Result<Handle, Status> {
+        let handle = self.handle;
+        let mut out = 0;
+        let status = unsafe { sys::zx_handle_duplicate(handle, rights.bits(), &mut out) };
+        ok(status).map(|()| Handle(out))
+    }
+
+    pub fn signal(&self, clear_mask: Signals, set_mask: Signals) -> Result<(), Status> {
+        let handle = self.handle;
+        let status = unsafe { sys::zx_object_signal(handle, clear_mask.bits(), set_mask.bits()) };
+        ok(status)
+    }
+
+    pub fn wait(&self, signals: Signals, deadline: Time) -> Result<Signals, Status> {
+        let handle = self.handle;
+        let mut pending = Signals::empty().bits();
+        let status = unsafe {
+            sys::zx_object_wait_one(handle, signals.bits(), deadline.nanos(), &mut pending)
+        };
+        ok(status).map(|()| Signals::from_bits_truncate(pending))
+    }
+
+    pub fn wait_async(&self, port: &Port, key: u64, signals: Signals, options: WaitAsyncOpts)
+        -> Result<(), Status>
+    {
+        let handle = self.handle;
+        let status = unsafe {
+            sys::zx_object_wait_async(
+                handle, port.raw_handle(), key, signals.bits(), options as u32)
+        };
+        ok(status)
+    }
+}
+
+/// A trait to get a reference to the underlying handle of an object.
+pub trait AsHandleRef {
+    /// Get a reference to the handle. One important use of such a reference is
+    /// for `object_wait_many`.
+    fn as_handle_ref(&self) -> HandleRef;
+
+    /// Interpret the reference as a raw handle (an integer type). Two distinct
+    /// handles will have different raw values (so it can perhaps be used as a
+    /// key in a data structure).
+    fn raw_handle(&self) -> sys::zx_handle_t {
+        self.as_handle_ref().raw_handle()
+    }
+
+    /// Set and clear userspace-accessible signal bits on an object. Wraps the
+    /// [zx_object_signal](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/object_signal.md)
+    /// syscall.
+    fn signal_handle(&self, clear_mask: Signals, set_mask: Signals) -> Result<(), Status> {
+        self.as_handle_ref().signal(clear_mask, set_mask)
+    }
+
+    /// Waits on a handle. Wraps the
+    /// [zx_object_wait_one](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/object_wait_one.md)
+    /// syscall.
+    fn wait_handle(&self, signals: Signals, deadline: Time) -> Result<Signals, Status> {
+        self.as_handle_ref().wait(signals, deadline)
+    }
+
+    /// Causes packet delivery on the given port when the object changes state and matches signals.
+    /// [zx_object_wait_async](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/object_wait_async.md)
+    /// syscall.
+    fn wait_async_handle(&self, port: &Port, key: u64, signals: Signals, options: WaitAsyncOpts)
+        -> Result<(), Status>
+    {
+        self.as_handle_ref().wait_async(port, key, signals, options)
+    }
+}
+
+impl<'a> AsHandleRef for HandleRef<'a> {
+    fn as_handle_ref(&self) -> HandleRef { *self }
+}
+
+/// A trait implemented by all handle-based types.
+///
+/// Note: it is reasonable for user-defined objects wrapping a handle to implement
+/// this trait. For example, a specific interface in some protocol might be
+/// represented as a newtype of `Channel`, and implement the `as_handle_ref`
+/// method and the `From<Handle>` trait to facilitate conversion from and to the
+/// interface.
+pub trait HandleBased: AsHandleRef + From<Handle> + Into<Handle> {
+    /// Duplicate a handle, possibly reducing the rights available. Wraps the
+    /// [zx_handle_duplicate](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/handle_duplicate.md)
+    /// syscall.
+    fn duplicate_handle(&self, rights: Rights) -> Result<Self, Status> {
+        self.as_handle_ref().duplicate(rights).map(|handle| Self::from(handle))
+    }
+
+    /// Create a replacement for a handle, possibly reducing the rights available. This invalidates
+    /// the original handle. Wraps the
+    /// [zx_handle_replace](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/handle_replace.md)
+    /// syscall.
+    fn replace_handle(self, rights: Rights) -> Result<Self, Status> {
+        <Self as Into<Handle>>::into(self)
+            .replace(rights).map(|handle| Self::from(handle))
+    }
+
+    /// Converts the value into its inner handle.
+    ///
+    /// This is a convenience function which simply forwards to the `Into` trait.
+    fn into_handle(self) -> Handle {
+        self.into()
+    }
+
+    /// Converts the handle into it's raw representation.
+    ///
+    /// The caller takes ownership over the raw handle, and must close or transfer it to avoid a handle leak.
+    fn into_raw(self) -> sys::zx_handle_t {
+        let h = self.into_handle();
+        let r = h.0;
+        mem::forget(h);
+        r
+   }
+
+    /// Creates an instance of this type from a handle.
+    ///
+    /// This is a convenience function which simply forwards to the `From` trait.
+    fn from_handle(handle: Handle) -> Self {
+        Self::from(handle)
+    }
+
+    /// Creates an instance of another handle-based type from this value's inner handle.
+    fn into_handle_based<H: HandleBased>(self) -> H {
+        H::from_handle(self.into_handle())
+    }
+
+    /// Creates an instance of this type from the inner handle of another
+    /// handle-based type.
+    fn from_handle_based<H: HandleBased>(h: H) -> Self {
+        Self::from_handle(h.into_handle())
+    }
+}
+
+/// A trait implemented by all handles for objects which have a peer.
+pub trait Peered: HandleBased {
+    /// Set and clear userspace-accessible signal bits on the object's peer. Wraps the
+    /// [zx_object_signal_peer](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/object_signal.md)
+    /// syscall.
+    fn signal_peer(&self, clear_mask: Signals, set_mask: Signals) -> Result<(), Status> {
+        let handle = self.as_handle_ref().handle;
+        let status = unsafe {
+            sys::zx_object_signal_peer(handle, clear_mask.bits(), set_mask.bits())
+        };
+        ok(status)
+    }
+}
+
+/// A trait implemented by all handles for objects which can have a cookie attached.
+pub trait Cookied: HandleBased {
+    /// Get the cookie attached to this object, if any. Wraps the
+    /// [zx_object_get_cookie](https://fuchsia.googlesource.com/zircon/+/HEAD/docs/syscalls/object_get_cookie.md)
+    /// syscall.
+    fn get_cookie(&self, scope: &HandleRef) -> Result<u64, Status> {
+        let handle = self.as_handle_ref().handle;
+        let mut cookie = 0;
+        let status = unsafe { sys::zx_object_get_cookie(handle, scope.handle, &mut cookie) };
+        ok(status).map(|()| cookie)
+    }
+
+    /// Attach an opaque cookie to this object with the given scope. The cookie may be read or
+    /// changed in future only with the same scope. Wraps the
+    /// [zx_object_set_cookie](https://fuchsia.googlesource.com/zircon/+/HEAD/docs/syscalls/object_set_cookie.md)
+    /// syscall.
+    fn set_cookie(&self, scope: &HandleRef, cookie: u64) -> Result<(), Status> {
+        let handle = self.as_handle_ref().handle;
+        let status = unsafe { sys::zx_object_set_cookie(handle, scope.handle, cookie) };
+        ok(status)
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/job.rs b/third_party/rust/fuchsia-zircon/src/job.rs
new file mode 100644
index 0000000000..1bb1ef274d
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/job.rs
@@ -0,0 +1,14 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon job.
+
+use {AsHandleRef, HandleBased, Handle, HandleRef};
+
+/// An object representing a Zircon job.
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Job(Handle);
+impl_handle_based!(Job);
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/lib.rs b/third_party/rust/fuchsia-zircon/src/lib.rs
new file mode 100644
index 0000000000..26444402cc
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/lib.rs
@@ -0,0 +1,365 @@
+// Copyright 2016 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon kernel
+//! [syscalls](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls.md).
+
+#![deny(warnings)]
+
+#[macro_use]
+extern crate bitflags;
+
+pub extern crate fuchsia_zircon_sys as sys;
+
+#[deprecated(note="use fuchsia_zircon::sys::ZX_CPRNG_DRAW_MAX_LEN instead")]
+#[doc(hidden)]
+pub use sys::ZX_CPRNG_DRAW_MAX_LEN;
+
+// Implements the HandleBased traits for a Handle newtype struct
+macro_rules! impl_handle_based {
+    ($type_name:path) => {
+        impl AsHandleRef for $type_name {
+            fn as_handle_ref(&self) -> HandleRef {
+                self.0.as_handle_ref()
+            }
+        }
+
+        impl From<Handle> for $type_name {
+            fn from(handle: Handle) -> Self {
+                $type_name(handle)
+            }
+        }
+
+        impl From<$type_name> for Handle {
+            fn from(x: $type_name) -> Handle {
+                x.0
+            }
+        }
+
+        impl HandleBased for $type_name {}
+    }
+}
+
+// Creates associated constants of TypeName of the form
+// `pub const NAME: TypeName = TypeName(value);`
+macro_rules! assoc_consts {
+    ($typename:ident, [$($name:ident = $num:expr;)*]) => {
+        #[allow(non_upper_case_globals)]
+        impl $typename {
+            $(
+                pub const $name: $typename = $typename($num);
+            )*
+        }
+    }
+}
+
+mod channel;
+mod cprng;
+mod event;
+mod eventpair;
+mod fifo;
+mod handle;
+mod job;
+mod port;
+mod process;
+mod rights;
+mod socket;
+mod signals;
+mod status;
+mod time;
+mod thread;
+mod vmar;
+mod vmo;
+
+pub use channel::*;
+pub use cprng::*;
+pub use event::*;
+pub use eventpair::*;
+pub use fifo::*;
+pub use handle::*;
+pub use job::*;
+pub use port::*;
+pub use process::*;
+pub use rights::*;
+pub use socket::*;
+pub use signals::*;
+pub use status::*;
+pub use thread::*;
+pub use time::*;
+pub use vmar::*;
+pub use vmo::*;
+
+/// Prelude containing common utility traits.
+/// Designed for use like `use fuchsia_zircon::prelude::*;`
+pub mod prelude {
+    pub use {
+        AsHandleRef,
+        Cookied,
+        DurationNum,
+        HandleBased,
+        Peered,
+    };
+}
+
+/// Convenience re-export of `Status::ok`.
+pub fn ok(raw: sys::zx_status_t) -> Result<(), Status> {
+    Status::ok(raw)
+}
+
+/// A "wait item" containing a handle reference and information about what signals
+/// to wait on, and, on return from `object_wait_many`, which are pending.
+#[repr(C)]
+#[derive(Debug)]
+pub struct WaitItem<'a> {
+    /// The handle to wait on.
+    pub handle: HandleRef<'a>,
+    /// A set of signals to wait for.
+    pub waitfor: Signals,
+    /// The set of signals pending, on return of `object_wait_many`.
+    pub pending: Signals,
+}
+
+/// An identifier to select a particular clock. See
+/// [zx_time_get](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/time_get.md)
+/// for more information about the possible values.
+#[repr(u32)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum ClockId {
+    /// The number of nanoseconds since the system was powered on. Corresponds to
+    /// `ZX_CLOCK_MONOTONIC`.
+    Monotonic = 0,
+    /// The number of wall clock nanoseconds since the Unix epoch (midnight on January 1 1970) in
+    /// UTC. Corresponds to ZX_CLOCK_UTC.
+    UTC = 1,
+    /// The number of nanoseconds the current thread has been running for. Corresponds to
+    /// ZX_CLOCK_THREAD.
+    Thread = 2,
+}
+
+/// Wait on multiple handles.
+/// The success return value is a bool indicating whether one or more of the
+/// provided handle references was closed during the wait.
+///
+/// Wraps the
+/// [zx_object_wait_many](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/object_wait_many.md)
+/// syscall.
+pub fn object_wait_many(items: &mut [WaitItem], deadline: Time) -> Result<bool, Status>
+{
+    let len = try!(usize_into_u32(items.len()).map_err(|_| Status::OUT_OF_RANGE));
+    let items_ptr = items.as_mut_ptr() as *mut sys::zx_wait_item_t;
+    let status = unsafe { sys::zx_object_wait_many( items_ptr, len, deadline.nanos()) };
+    if status == sys::ZX_ERR_CANCELED {
+        return Ok(true)
+    }
+    ok(status).map(|()| false)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[allow(unused_imports)]
+    use super::prelude::*;
+
+    #[test]
+    fn monotonic_time_increases() {
+        let time1 = Time::get(ClockId::Monotonic);
+        1_000.nanos().sleep();
+        let time2 = Time::get(ClockId::Monotonic);
+        assert!(time2 > time1);
+    }
+
+    #[test]
+    fn utc_time_increases() {
+        let time1 = Time::get(ClockId::UTC);
+        1_000.nanos().sleep();
+        let time2 = Time::get(ClockId::UTC);
+        assert!(time2 > time1);
+    }
+
+    #[test]
+    fn thread_time_increases() {
+        let time1 = Time::get(ClockId::Thread);
+        1_000.nanos().sleep();
+        let time2 = Time::get(ClockId::Thread);
+        assert!(time2 > time1);
+    }
+
+    #[test]
+    fn ticks_increases() {
+        let ticks1 = ticks_get();
+        1_000.nanos().sleep();
+        let ticks2 = ticks_get();
+        assert!(ticks2 > ticks1);
+    }
+
+    #[test]
+    fn tick_length() {
+        let sleep_time = 1.milli();
+        let ticks1 = ticks_get();
+        sleep_time.sleep();
+        let ticks2 = ticks_get();
+
+        // The number of ticks should have increased by at least 1 ms worth
+        let sleep_ticks = sleep_time.millis() * ticks_per_second() / 1000;
+        assert!(ticks2 >= (ticks1 + sleep_ticks));
+    }
+
+    #[test]
+    fn into_raw() {
+        let vmo = Vmo::create(1).unwrap();
+        let h = vmo.into_raw();
+        let vmo2 = Vmo::from(unsafe { Handle::from_raw(h) });
+        assert!(vmo2.write(b"1", 0).is_ok());
+    }
+
+    #[test]
+    fn sleep() {
+        let sleep_ns = 1.millis();
+        let time1 = Time::get(ClockId::Monotonic);
+        sleep_ns.sleep();
+        let time2 = Time::get(ClockId::Monotonic);
+        assert!(time2 > time1 + sleep_ns);
+    }
+
+    /// Test duplication by means of a VMO
+    #[test]
+    fn duplicate() {
+        let hello_length: usize = 5;
+
+        // Create a VMO and write some data to it.
+        let vmo = Vmo::create(hello_length as u64).unwrap();
+        assert!(vmo.write(b"hello", 0).is_ok());
+
+        // Replace, reducing rights to read.
+        let readonly_vmo = vmo.duplicate_handle(Rights::READ).unwrap();
+        // Make sure we can read but not write.
+        let mut read_vec = vec![0; hello_length];
+        assert_eq!(readonly_vmo.read(&mut read_vec, 0).unwrap(), hello_length);
+        assert_eq!(read_vec, b"hello");
+        assert_eq!(readonly_vmo.write(b"", 0), Err(Status::ACCESS_DENIED));
+
+        // Write new data to the original handle, and read it from the new handle
+        assert!(vmo.write(b"bye", 0).is_ok());
+        assert_eq!(readonly_vmo.read(&mut read_vec, 0).unwrap(), hello_length);
+        assert_eq!(read_vec, b"byelo");
+    }
+
+    // Test replace by means of a VMO
+    #[test]
+    fn replace() {
+        let hello_length: usize = 5;
+
+        // Create a VMO and write some data to it.
+        let vmo = Vmo::create(hello_length as u64).unwrap();
+        assert!(vmo.write(b"hello", 0).is_ok());
+
+        // Replace, reducing rights to read.
+        let readonly_vmo = vmo.replace_handle(Rights::READ).unwrap();
+        // Make sure we can read but not write.
+        let mut read_vec = vec![0; hello_length];
+        assert_eq!(readonly_vmo.read(&mut read_vec, 0).unwrap(), hello_length);
+        assert_eq!(read_vec, b"hello");
+        assert_eq!(readonly_vmo.write(b"", 0), Err(Status::ACCESS_DENIED));
+    }
+
+    #[test]
+    fn wait_and_signal() {
+        let event = Event::create().unwrap();
+        let ten_ms = 10.millis();
+
+        // Waiting on it without setting any signal should time out.
+        assert_eq!(event.wait_handle(
+            Signals::USER_0, ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // If we set a signal, we should be able to wait for it.
+        assert!(event.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        assert_eq!(event.wait_handle(Signals::USER_0, ten_ms.after_now()).unwrap(),
+            Signals::USER_0);
+
+        // Should still work, signals aren't automatically cleared.
+        assert_eq!(event.wait_handle(Signals::USER_0, ten_ms.after_now()).unwrap(),
+            Signals::USER_0);
+
+        // Now clear it, and waiting should time out again.
+        assert!(event.signal_handle(Signals::USER_0, Signals::NONE).is_ok());
+        assert_eq!(event.wait_handle(
+            Signals::USER_0, ten_ms.after_now()), Err(Status::TIMED_OUT));
+    }
+
+    #[test]
+    fn wait_many_and_signal() {
+        let ten_ms = 10.millis();
+        let e1 = Event::create().unwrap();
+        let e2 = Event::create().unwrap();
+
+        // Waiting on them now should time out.
+        let mut items = vec![
+          WaitItem { handle: e1.as_handle_ref(), waitfor: Signals::USER_0, pending: Signals::NONE },
+          WaitItem { handle: e2.as_handle_ref(), waitfor: Signals::USER_1, pending: Signals::NONE },
+        ];
+        assert_eq!(object_wait_many(&mut items, ten_ms.after_now()), Err(Status::TIMED_OUT));
+        assert_eq!(items[0].pending, Signals::NONE);
+        assert_eq!(items[1].pending, Signals::NONE);
+
+        // Signal one object and it should return success.
+        assert!(e1.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        assert!(object_wait_many(&mut items, ten_ms.after_now()).is_ok());
+        assert_eq!(items[0].pending, Signals::USER_0);
+        assert_eq!(items[1].pending, Signals::NONE);
+
+        // Signal the other and it should return both.
+        assert!(e2.signal_handle(Signals::NONE, Signals::USER_1).is_ok());
+        assert!(object_wait_many(&mut items, ten_ms.after_now()).is_ok());
+        assert_eq!(items[0].pending, Signals::USER_0);
+        assert_eq!(items[1].pending, Signals::USER_1);
+
+        // Clear signals on both; now it should time out again.
+        assert!(e1.signal_handle(Signals::USER_0, Signals::NONE).is_ok());
+        assert!(e2.signal_handle(Signals::USER_1, Signals::NONE).is_ok());
+        assert_eq!(object_wait_many(&mut items, ten_ms.after_now()), Err(Status::TIMED_OUT));
+        assert_eq!(items[0].pending, Signals::NONE);
+        assert_eq!(items[1].pending, Signals::NONE);
+    }
+
+    #[test]
+    fn cookies() {
+        let event = Event::create().unwrap();
+        let scope = Event::create().unwrap();
+
+        // Getting a cookie when none has been set should fail.
+        assert_eq!(event.get_cookie(&scope.as_handle_ref()), Err(Status::ACCESS_DENIED));
+
+        // Set a cookie.
+        assert_eq!(event.set_cookie(&scope.as_handle_ref(), 42), Ok(()));
+
+        // Should get it back....
+        assert_eq!(event.get_cookie(&scope.as_handle_ref()), Ok(42));
+
+        // but not with the wrong scope!
+        assert_eq!(event.get_cookie(&event.as_handle_ref()), Err(Status::ACCESS_DENIED));
+
+        // Can change it, with the same scope...
+        assert_eq!(event.set_cookie(&scope.as_handle_ref(), 123), Ok(()));
+
+        // but not with a different scope.
+        assert_eq!(event.set_cookie(&event.as_handle_ref(), 123), Err(Status::ACCESS_DENIED));
+    }
+}
+
+pub fn usize_into_u32(n: usize) -> Result<u32, ()> {
+    if n > ::std::u32::MAX as usize || n < ::std::u32::MIN as usize {
+        return Err(())
+    }
+    Ok(n as u32)
+}
+
+pub fn size_to_u32_sat(n: usize) -> u32 {
+    if n > ::std::u32::MAX as usize {
+        return ::std::u32::MAX;
+    }
+    if n < ::std::u32::MIN as usize {
+        return ::std::u32::MIN;
+    }
+    n as u32
+}
diff --git a/third_party/rust/fuchsia-zircon/src/port.rs b/third_party/rust/fuchsia-zircon/src/port.rs
new file mode 100644
index 0000000000..6a9e8a8f7f
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/port.rs
@@ -0,0 +1,344 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon port objects.
+
+use std::mem;
+
+use {AsHandleRef, HandleBased, Handle, HandleRef, Signals, Status, Time};
+use {sys, ok};
+
+/// An object representing a Zircon
+/// [port](https://fuchsia.googlesource.com/zircon/+/master/docs/objects/port.md).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Port(Handle);
+impl_handle_based!(Port);
+
+/// A packet sent through a port. This is a type-safe wrapper for
+/// [zx_port_packet_t](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/port_wait.md).
+#[derive(PartialEq, Eq, Debug)]
+pub struct Packet(sys::zx_port_packet_t);
+
+/// The contents of a `Packet`.
+#[derive(Debug, Copy, Clone)]
+pub enum PacketContents {
+    /// A user-generated packet.
+    User(UserPacket),
+    /// A one-shot signal packet generated via `object_wait_async`.
+    SignalOne(SignalPacket),
+    /// A repeating signal packet generated via `object_wait_async`.
+    SignalRep(SignalPacket),
+
+    #[doc(hidden)]
+    __Nonexhaustive
+}
+
+/// Contents of a user packet (one sent by `port_queue`). This is a type-safe wrapper for
+/// [zx_packet_user_t](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/port_wait.md).
+#[derive(Debug, Copy, Clone)]
+pub struct UserPacket(sys::zx_packet_user_t);
+
+/// Contents of a signal packet (one generated by the kernel). This is a type-safe wrapper for
+/// [zx_packet_signal_t](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/port_wait.md).
+#[derive(Debug, Copy, Clone)]
+pub struct SignalPacket(sys::zx_packet_signal_t);
+
+impl Packet {
+    /// Creates a new packet with `UserPacket` data.
+    pub fn from_user_packet(key: u64, status: i32, user: UserPacket) -> Packet {
+        Packet(
+            sys::zx_port_packet_t {
+                key: key,
+                packet_type: sys::zx_packet_type_t::ZX_PKT_TYPE_USER,
+                status: status,
+                union: user.0,
+            }
+        )
+    }
+
+    /// The packet's key.
+    pub fn key(&self) -> u64 {
+        self.0.key
+    }
+
+    /// The packet's status.
+    // TODO: should this type be wrapped?
+    pub fn status(&self) -> i32 {
+        self.0.status
+    }
+
+    /// The contents of the packet.
+    pub fn contents(&self) -> PacketContents {
+        if self.0.packet_type == sys::zx_packet_type_t::ZX_PKT_TYPE_USER {
+            PacketContents::User(UserPacket(self.0.union))
+        } else if self.0.packet_type == sys::zx_packet_type_t::ZX_PKT_TYPE_SIGNAL_ONE {
+            PacketContents::SignalOne(SignalPacket(unsafe { mem::transmute_copy(&self.0.union) }))
+        } else if self.0.packet_type == sys::zx_packet_type_t::ZX_PKT_TYPE_SIGNAL_REP {
+            PacketContents::SignalRep(SignalPacket(unsafe { mem::transmute_copy(&self.0.union) }))
+        } else {
+            panic!("unexpected packet type");
+        }
+    }
+}
+
+impl UserPacket {
+    pub fn from_u8_array(val: [u8; 32]) -> UserPacket {
+        UserPacket(val)
+    }
+
+    pub fn as_u8_array(&self) -> &[u8; 32] {
+        &self.0
+    }
+
+    pub fn as_mut_u8_array(&mut self) -> &mut [u8; 32] {
+        &mut self.0
+    }
+}
+
+impl SignalPacket {
+    /// The signals used in the call to `object_wait_async`.
+    pub fn trigger(&self) -> Signals {
+        Signals::from_bits_truncate(self.0.trigger)
+    }
+
+    /// The observed signals.
+    pub fn observed(&self) -> Signals {
+        Signals::from_bits_truncate(self.0.observed)
+    }
+
+    /// A per object count of pending operations.
+    pub fn count(&self) -> u64 {
+        self.0.count
+    }
+}
+
+impl Port {
+    /// Create an IO port, allowing IO packets to be read and enqueued.
+    ///
+    /// Wraps the
+    /// [zx_port_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/port_create.md)
+    /// syscall.
+    pub fn create() -> Result<Port, Status> {
+        unsafe {
+            let mut handle = 0;
+            let opts = 0;
+            let status = sys::zx_port_create(opts, &mut handle);
+            ok(status)?;
+            Ok(Handle::from_raw(handle).into())
+        }
+    }
+
+    /// Attempt to queue a user packet to the IO port.
+    ///
+    /// Wraps the
+    /// [zx_port_queue](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/port_queue.md)
+    /// syscall.
+    pub fn queue(&self, packet: &Packet) -> Result<(), Status> {
+        let status = unsafe {
+            sys::zx_port_queue(self.raw_handle(),
+                &packet.0 as *const sys::zx_port_packet_t, 0)
+        };
+        ok(status)
+    }
+
+    /// Wait for a packet to arrive on a (V2) port.
+    ///
+    /// Wraps the
+    /// [zx_port_wait](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/port_wait.md)
+    /// syscall.
+    pub fn wait(&self, deadline: Time) -> Result<Packet, Status> {
+        let mut packet = Default::default();
+        let status = unsafe {
+            sys::zx_port_wait(self.raw_handle(), deadline.nanos(),
+                &mut packet as *mut sys::zx_port_packet_t, 0)
+        };
+        ok(status)?;
+        Ok(Packet(packet))
+    }
+
+    /// Cancel pending wait_async calls for an object with the given key.
+    ///
+    /// Wraps the
+    /// [zx_port_cancel](https://fuchsia.googlesource.com/zircon/+/HEAD/docs/syscalls/port_cancel.md)
+    /// syscall.
+    pub fn cancel<H>(&self, source: &H, key: u64) -> Result<(), Status> where H: HandleBased {
+        let status = unsafe {
+            sys::zx_port_cancel(self.raw_handle(), source.raw_handle(), key)
+        };
+        ok(status)
+    }
+}
+
+/// Options for wait_async.
+#[repr(u32)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum WaitAsyncOpts {
+    Once = sys::ZX_WAIT_ASYNC_ONCE,
+    Repeating = sys::ZX_WAIT_ASYNC_REPEATING,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use {DurationNum, Event};
+
+    #[test]
+    fn port_basic() {
+        let ten_ms = 10.millis();
+
+        let port = Port::create().unwrap();
+
+        // Waiting now should time out.
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // Send a valid packet.
+        let packet = Packet::from_user_packet(
+            42,
+            123,
+            UserPacket::from_u8_array([13; 32]),
+        );
+        assert!(port.queue(&packet).is_ok());
+
+        // Waiting should succeed this time. We should get back the packet we sent.
+        let read_packet = port.wait(ten_ms.after_now()).unwrap();
+        assert_eq!(read_packet, packet);
+    }
+
+    #[test]
+    fn wait_async_once() {
+        let ten_ms = 10.millis();
+        let key = 42;
+
+        let port = Port::create().unwrap();
+        let event = Event::create().unwrap();
+
+        assert!(event.wait_async_handle(&port, key, Signals::USER_0 | Signals::USER_1,
+            WaitAsyncOpts::Once).is_ok());
+
+        // Waiting without setting any signal should time out.
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // If we set a signal, we should be able to wait for it.
+        assert!(event.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        let read_packet = port.wait(ten_ms.after_now()).unwrap();
+        assert_eq!(read_packet.key(), key);
+        assert_eq!(read_packet.status(), 0);
+        match read_packet.contents() {
+            PacketContents::SignalOne(sig) => {
+                assert_eq!(sig.trigger(), Signals::USER_0 | Signals::USER_1);
+                assert_eq!(sig.observed(), Signals::USER_0);
+                assert_eq!(sig.count(), 1);
+            }
+            _ => panic!("wrong packet type"),
+        }
+
+        // Shouldn't get any more packets.
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // Calling wait_async again should result in another packet.
+        assert!(event.wait_async_handle(&port, key, Signals::USER_0, WaitAsyncOpts::Once).is_ok());
+        let read_packet = port.wait(ten_ms.after_now()).unwrap();
+        assert_eq!(read_packet.key(), key);
+        assert_eq!(read_packet.status(), 0);
+        match read_packet.contents() {
+            PacketContents::SignalOne(sig) => {
+                assert_eq!(sig.trigger(), Signals::USER_0);
+                assert_eq!(sig.observed(), Signals::USER_0);
+                assert_eq!(sig.count(), 1);
+            }
+            _ => panic!("wrong packet type"),
+        }
+
+        // Calling wait_async_handle then cancel, we should not get a packet as cancel will
+        // remove it from  the queue.
+        assert!(event.wait_async_handle(&port, key, Signals::USER_0, WaitAsyncOpts::Once).is_ok());
+        assert!(port.cancel(&event, key).is_ok());
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // If the event is signalled after the cancel, we also shouldn't get a packet.
+        assert!(event.signal_handle(Signals::USER_0, Signals::NONE).is_ok());  // clear signal
+        assert!(event.wait_async_handle(&port, key, Signals::USER_0, WaitAsyncOpts::Once).is_ok());
+        assert!(port.cancel(&event, key).is_ok());
+        assert!(event.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+    }
+
+    #[test]
+    fn wait_async_repeating() {
+        let ten_ms = 10.millis();
+        let key = 42;
+
+        let port = Port::create().unwrap();
+        let event = Event::create().unwrap();
+
+        assert!(event.wait_async_handle(&port, key, Signals::USER_0 | Signals::USER_1,
+            WaitAsyncOpts::Repeating).is_ok());
+
+        // Waiting without setting any signal should time out.
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // If we set a signal, we should be able to wait for it.
+        assert!(event.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        let read_packet = port.wait(ten_ms.after_now()).unwrap();
+        assert_eq!(read_packet.key(), key);
+        assert_eq!(read_packet.status(), 0);
+        match read_packet.contents() {
+            PacketContents::SignalRep(sig) => {
+                assert_eq!(sig.trigger(), Signals::USER_0 | Signals::USER_1);
+                assert_eq!(sig.observed(), Signals::USER_0);
+                assert_eq!(sig.count(), 1);
+            }
+            _ => panic!("wrong packet type"),
+        }
+
+        // Should not get any more packets, as ZX_WAIT_ASYNC_REPEATING is edge triggered rather than
+        // level triggered.
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // If we clear and resignal, we should get the same packet again,
+        // even though we didn't call event.wait_async again.
+        assert!(event.signal_handle(Signals::USER_0, Signals::NONE).is_ok());  // clear signal
+        assert!(event.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        let read_packet = port.wait(ten_ms.after_now()).unwrap();
+        assert_eq!(read_packet.key(), key);
+        assert_eq!(read_packet.status(), 0);
+        match read_packet.contents() {
+            PacketContents::SignalRep(sig) => {
+                assert_eq!(sig.trigger(), Signals::USER_0 | Signals::USER_1);
+                assert_eq!(sig.observed(), Signals::USER_0);
+                assert_eq!(sig.count(), 1);
+            }
+            _ => panic!("wrong packet type"),
+        }
+
+        // Cancelling the wait should stop us getting packets...
+        assert!(port.cancel(&event, key).is_ok());
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+        // ... even if we clear and resignal
+        assert!(event.signal_handle(Signals::USER_0, Signals::NONE).is_ok());  // clear signal
+        assert!(event.signal_handle(Signals::NONE, Signals::USER_0).is_ok());
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+
+        // Calling wait_async again should result in another packet.
+        assert!(event.wait_async_handle(
+            &port, key, Signals::USER_0, WaitAsyncOpts::Repeating).is_ok());
+        let read_packet = port.wait(ten_ms.after_now()).unwrap();
+        assert_eq!(read_packet.key(), key);
+        assert_eq!(read_packet.status(), 0);
+        match read_packet.contents() {
+            PacketContents::SignalRep(sig) => {
+                assert_eq!(sig.trigger(), Signals::USER_0);
+                assert_eq!(sig.observed(), Signals::USER_0);
+                assert_eq!(sig.count(), 1);
+            }
+            _ => panic!("wrong packet type"),
+        }
+
+        // Closing the handle should stop us getting packets.
+        drop(event);
+        assert_eq!(port.wait(ten_ms.after_now()), Err(Status::TIMED_OUT));
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/process.rs b/third_party/rust/fuchsia-zircon/src/process.rs
new file mode 100644
index 0000000000..b46f1bdd23
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/process.rs
@@ -0,0 +1,14 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon process.
+
+use {AsHandleRef, HandleBased, Handle, HandleRef};
+
+/// An object representing a Zircon process.
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Process(Handle);
+impl_handle_based!(Process);
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/rights.rs b/third_party/rust/fuchsia-zircon/src/rights.rs
new file mode 100644
index 0000000000..a41ad12f54
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/rights.rs
@@ -0,0 +1,28 @@
+use sys;
+
+bitflags! {
+    /// Rights associated with a handle.
+    ///
+    /// See [rights.md](https://fuchsia.googlesource.com/zircon/+/master/docs/rights.md)
+    /// for more information.
+    #[repr(C)]
+    pub struct Rights: sys::zx_rights_t {
+        const NONE         = sys::ZX_RIGHT_NONE;
+        const DUPLICATE    = sys::ZX_RIGHT_DUPLICATE;
+        const TRANSFER     = sys::ZX_RIGHT_TRANSFER;
+        const READ         = sys::ZX_RIGHT_READ;
+        const WRITE        = sys::ZX_RIGHT_WRITE;
+        const EXECUTE      = sys::ZX_RIGHT_EXECUTE;
+        const MAP          = sys::ZX_RIGHT_MAP;
+        const GET_PROPERTY = sys::ZX_RIGHT_GET_PROPERTY;
+        const SET_PROPERTY = sys::ZX_RIGHT_SET_PROPERTY;
+        const ENUMERATE    = sys::ZX_RIGHT_ENUMERATE;
+        const DESTROY      = sys::ZX_RIGHT_DESTROY;
+        const SET_POLICY   = sys::ZX_RIGHT_SET_POLICY;
+        const GET_POLICY   = sys::ZX_RIGHT_GET_POLICY;
+        const SIGNAL       = sys::ZX_RIGHT_SIGNAL;
+        const SIGNAL_PEER  = sys::ZX_RIGHT_SIGNAL_PEER;
+        const WAIT         = sys::ZX_RIGHT_WAIT;
+        const SAME_RIGHTS  = sys::ZX_RIGHT_SAME_RIGHTS;
+    }
+}
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/signals.rs b/third_party/rust/fuchsia-zircon/src/signals.rs
new file mode 100644
index 0000000000..e5189f5ebc
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/signals.rs
@@ -0,0 +1,105 @@
+use sys::*;
+
+bitflags! {
+    /// Signals that can be waited upon.
+    ///
+    /// See
+    /// [Objects and signals](https://fuchsia.googlesource.com/zircon/+/master/docs/concepts.md#Objects-and-Signals)
+    /// in the Zircon kernel documentation. Note: the names of signals are still in flux.
+    #[repr(C)]
+    pub struct Signals: zx_signals_t {
+        const NONE          = ZX_SIGNAL_NONE;
+        const OBJECT_ALL    = ZX_OBJECT_SIGNAL_ALL;
+        const USER_ALL      = ZX_USER_SIGNAL_ALL;
+        const OBJECT_0      = ZX_OBJECT_SIGNAL_0;
+        const OBJECT_1      = ZX_OBJECT_SIGNAL_1;
+        const OBJECT_2      = ZX_OBJECT_SIGNAL_2;
+        const OBJECT_3      = ZX_OBJECT_SIGNAL_3;
+        const OBJECT_4      = ZX_OBJECT_SIGNAL_4;
+        const OBJECT_5      = ZX_OBJECT_SIGNAL_5;
+        const OBJECT_6      = ZX_OBJECT_SIGNAL_6;
+        const OBJECT_7      = ZX_OBJECT_SIGNAL_7;
+        const OBJECT_8      = ZX_OBJECT_SIGNAL_8;
+        const OBJECT_9      = ZX_OBJECT_SIGNAL_9;
+        const OBJECT_10     = ZX_OBJECT_SIGNAL_10;
+        const OBJECT_11     = ZX_OBJECT_SIGNAL_11;
+        const OBJECT_12     = ZX_OBJECT_SIGNAL_12;
+        const OBJECT_13     = ZX_OBJECT_SIGNAL_13;
+        const OBJECT_14     = ZX_OBJECT_SIGNAL_14;
+        const OBJECT_15     = ZX_OBJECT_SIGNAL_15;
+        const OBJECT_16     = ZX_OBJECT_SIGNAL_16;
+        const OBJECT_17     = ZX_OBJECT_SIGNAL_17;
+        const OBJECT_18     = ZX_OBJECT_SIGNAL_18;
+        const OBJECT_19     = ZX_OBJECT_SIGNAL_19;
+        const OBJECT_20     = ZX_OBJECT_SIGNAL_20;
+        const OBJECT_21     = ZX_OBJECT_SIGNAL_21;
+        const OBJECT_22     = ZX_OBJECT_SIGNAL_22;
+        const OBJECT_HANDLE_CLOSED = ZX_OBJECT_HANDLE_CLOSED;
+        const USER_0        = ZX_USER_SIGNAL_0;
+        const USER_1        = ZX_USER_SIGNAL_1;
+        const USER_2        = ZX_USER_SIGNAL_2;
+        const USER_3        = ZX_USER_SIGNAL_3;
+        const USER_4        = ZX_USER_SIGNAL_4;
+        const USER_5        = ZX_USER_SIGNAL_5;
+        const USER_6        = ZX_USER_SIGNAL_6;
+        const USER_7        = ZX_USER_SIGNAL_7;
+
+        const OBJECT_READABLE    = ZX_OBJECT_READABLE;
+        const OBJECT_WRITABLE    = ZX_OBJECT_WRITABLE;
+        const OBJECT_PEER_CLOSED = ZX_OBJECT_PEER_CLOSED;
+
+        // Cancelation (handle was closed while waiting with it)
+        const HANDLE_CLOSED = ZX_SIGNAL_HANDLE_CLOSED;
+
+        // Event
+        const EVENT_SIGNALED = ZX_EVENT_SIGNALED;
+
+        // EventPair
+        const EVENT_PAIR_SIGNALED = ZX_EPAIR_SIGNALED;
+        const EVENT_PAIR_CLOSED   = ZX_EPAIR_CLOSED;
+
+        // Task signals (process, thread, job)
+        const TASK_TERMINATED = ZX_TASK_TERMINATED;
+
+        // Channel
+        const CHANNEL_READABLE    = ZX_CHANNEL_READABLE;
+        const CHANNEL_WRITABLE    = ZX_CHANNEL_WRITABLE;
+        const CHANNEL_PEER_CLOSED = ZX_CHANNEL_PEER_CLOSED;
+
+        // Socket
+        const SOCKET_READABLE    = ZX_SOCKET_READABLE;
+        const SOCKET_WRITABLE    = ZX_SOCKET_WRITABLE;
+        const SOCKET_PEER_CLOSED = ZX_SOCKET_PEER_CLOSED;
+
+        // Port
+        const PORT_READABLE = ZX_PORT_READABLE;
+
+        // Resource
+        const RESOURCE_DESTROYED   = ZX_RESOURCE_DESTROYED;
+        const RESOURCE_READABLE    = ZX_RESOURCE_READABLE;
+        const RESOURCE_WRITABLE    = ZX_RESOURCE_WRITABLE;
+        const RESOURCE_CHILD_ADDED = ZX_RESOURCE_CHILD_ADDED;
+
+        // Fifo
+        const FIFO_READABLE    = ZX_FIFO_READABLE;
+        const FIFO_WRITABLE    = ZX_FIFO_WRITABLE;
+        const FIFO_PEER_CLOSED = ZX_FIFO_PEER_CLOSED;
+
+        // Job
+        const JOB_NO_PROCESSES = ZX_JOB_NO_PROCESSES;
+        const JOB_NO_JOBS      = ZX_JOB_NO_JOBS;
+
+        // Process
+        const PROCESS_TERMINATED = ZX_PROCESS_TERMINATED;
+
+        // Thread
+        const THREAD_TERMINATED = ZX_THREAD_TERMINATED;
+
+        // Log
+        const LOG_READABLE = ZX_LOG_READABLE;
+        const LOG_WRITABLE = ZX_LOG_WRITABLE;
+
+        // Timer
+        const TIMER_SIGNALED = ZX_TIMER_SIGNALED;
+    }
+}
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/socket.rs b/third_party/rust/fuchsia-zircon/src/socket.rs
new file mode 100644
index 0000000000..c93e98cb73
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/socket.rs
@@ -0,0 +1,126 @@
+// Copyright 2016 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon sockets.
+
+use {AsHandleRef, HandleBased, Handle, HandleRef, Peered};
+use {sys, Status, ok};
+
+use std::ptr;
+
+/// An object representing a Zircon
+/// [socket](https://fuchsia.googlesource.com/zircon/+/master/docs/concepts.md#Message-Passing_Sockets-and-Channels).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Socket(Handle);
+impl_handle_based!(Socket);
+impl Peered for Socket {}
+
+impl Socket {
+    /// Create a socket, accessed through a pair of endpoints. Data written
+    /// into one may be read from the other.
+    ///
+    /// Wraps
+    /// [zx_socket_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/socket_create.md).
+    pub fn create() -> Result<(Socket, Socket), Status> {
+        unsafe {
+            let mut out0 = 0;
+            let mut out1 = 0;
+            let opts = 0;
+            let status = sys::zx_socket_create(opts, &mut out0, &mut out1);
+            ok(status)?;
+            Ok((
+                Self::from(Handle::from_raw(out0)),
+                Self::from(Handle::from_raw(out1))
+            ))
+        }
+    }
+
+    /// Write the given bytes into the socket.
+    /// Return value (on success) is number of bytes actually written.
+    ///
+    /// Wraps
+    /// [zx_socket_write](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/socket_write.md).
+    pub fn write(&self, bytes: &[u8]) -> Result<usize, Status> {
+        let mut actual = 0;
+        let opts = 0;
+        let status = unsafe {
+            sys::zx_socket_write(self.raw_handle(), opts, bytes.as_ptr(), bytes.len(),
+                &mut actual)
+        };
+        ok(status).map(|()| actual)
+    }
+
+    /// Read the given bytes from the socket.
+    /// Return value (on success) is number of bytes actually read.
+    ///
+    /// Wraps
+    /// [zx_socket_read](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/socket_read.md).
+    pub fn read(&self, bytes: &mut [u8]) -> Result<usize, Status> {
+        let mut actual = 0;
+        let opts = 0;
+        let status = unsafe {
+            sys::zx_socket_read(self.raw_handle(), opts, bytes.as_mut_ptr(),
+                bytes.len(), &mut actual)
+        };
+        ok(status)
+            .map(|()| actual)
+            .map_err(|status| {
+                // If an error is returned then actual is undefined, so to be safe
+                // we set it to 0 and ignore any data that is set in bytes.
+                actual = 0;
+                status
+            })
+    }
+
+    /// Close half of the socket, so attempts by the other side to write will fail.
+    ///
+    /// Implements the `ZX_SOCKET_HALF_CLOSE` option of
+    /// [zx_socket_write](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/socket_write.md).
+    pub fn half_close(&self) -> Result<(), Status> {
+        let status = unsafe { sys::zx_socket_write(self.raw_handle(), sys::ZX_SOCKET_HALF_CLOSE,
+            ptr::null(), 0, ptr::null_mut()) };
+        ok(status)
+    }
+
+    pub fn outstanding_read_bytes(&self) -> Result<usize, Status> {
+        let mut outstanding = 0;
+        let status = unsafe {
+            sys::zx_socket_read(self.raw_handle(), 0, ptr::null_mut(), 0, &mut outstanding)
+        };
+        ok(status).map(|()| outstanding)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn socket_basic() {
+        let (s1, s2) = Socket::create().unwrap();
+
+        // Write in one end and read it back out the other.
+        assert_eq!(s1.write(b"hello").unwrap(), 5);
+
+        let mut read_vec = vec![0; 8];
+        assert_eq!(s2.read(&mut read_vec).unwrap(), 5);
+        assert_eq!(&read_vec[0..5], b"hello");
+
+        // Try reading when there is nothing to read.
+        assert_eq!(s2.read(&mut read_vec), Err(Status::SHOULD_WAIT));
+
+        // Close the socket from one end.
+        assert!(s1.half_close().is_ok());
+        assert_eq!(s2.read(&mut read_vec), Err(Status::BAD_STATE));
+        assert_eq!(s1.write(b"fail"), Err(Status::BAD_STATE));
+
+        // Writing in the other direction should still work.
+        assert_eq!(s1.read(&mut read_vec), Err(Status::SHOULD_WAIT));
+        assert_eq!(s2.write(b"back").unwrap(), 4);
+        assert_eq!(s1.read(&mut read_vec).unwrap(), 4);
+        assert_eq!(&read_vec[0..4], b"back");
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/status.rs b/third_party/rust/fuchsia-zircon/src/status.rs
new file mode 100644
index 0000000000..4f3e38f988
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/status.rs
@@ -0,0 +1,162 @@
+use std::ffi::NulError;
+use std::io;
+use sys;
+
+/// Status type indicating the result of a Fuchsia syscall.
+///
+/// This type is generally used to indicate the reason for an error.
+/// While this type can contain `Status::OK` (`ZX_OK` in C land), elements of this type are
+/// generally constructed using the `ok` method, which checks for `ZX_OK` and returns a
+/// `Result<(), Status>` appropriately.
+#[repr(C)]
+#[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
+pub struct Status(sys::zx_status_t);
+impl Status {
+    /// Returns `Ok(())` if the status was `OK`,
+    /// otherwise returns `Err(status)`.
+    pub fn ok(raw: sys::zx_status_t) -> Result<(), Status> {
+        if raw == Status::OK.0 {
+            Ok(())
+        } else {
+            Err(Status(raw))
+        }
+    }
+
+    pub fn from_raw(raw: sys::zx_status_t) -> Self {
+        Status(raw)
+    }
+
+    pub fn into_raw(self) -> sys::zx_status_t {
+        self.0
+    }
+}
+assoc_consts!(Status, [
+    OK                 = sys::ZX_OK;
+    INTERNAL           = sys::ZX_ERR_INTERNAL;
+    NOT_SUPPORTED      = sys::ZX_ERR_NOT_SUPPORTED;
+    NO_RESOURCES       = sys::ZX_ERR_NO_RESOURCES;
+    NO_MEMORY          = sys::ZX_ERR_NO_MEMORY;
+    CALL_FAILED        = sys::ZX_ERR_CALL_FAILED;
+    INTERRUPTED_RETRY  = sys::ZX_ERR_INTERRUPTED_RETRY;
+    INVALID_ARGS       = sys::ZX_ERR_INVALID_ARGS;
+    BAD_HANDLE         = sys::ZX_ERR_BAD_HANDLE;
+    WRONG_TYPE         = sys::ZX_ERR_WRONG_TYPE;
+    BAD_SYSCALL        = sys::ZX_ERR_BAD_SYSCALL;
+    OUT_OF_RANGE       = sys::ZX_ERR_OUT_OF_RANGE;
+    BUFFER_TOO_SMALL   = sys::ZX_ERR_BUFFER_TOO_SMALL;
+    BAD_STATE          = sys::ZX_ERR_BAD_STATE;
+    TIMED_OUT          = sys::ZX_ERR_TIMED_OUT;
+    SHOULD_WAIT        = sys::ZX_ERR_SHOULD_WAIT;
+    CANCELED           = sys::ZX_ERR_CANCELED;
+    PEER_CLOSED        = sys::ZX_ERR_PEER_CLOSED;
+    NOT_FOUND          = sys::ZX_ERR_NOT_FOUND;
+    ALREADY_EXISTS     = sys::ZX_ERR_ALREADY_EXISTS;
+    ALREADY_BOUND      = sys::ZX_ERR_ALREADY_BOUND;
+    UNAVAILABLE        = sys::ZX_ERR_UNAVAILABLE;
+    ACCESS_DENIED      = sys::ZX_ERR_ACCESS_DENIED;
+    IO                 = sys::ZX_ERR_IO;
+    IO_REFUSED         = sys::ZX_ERR_IO_REFUSED;
+    IO_DATA_INTEGRITY  = sys::ZX_ERR_IO_DATA_INTEGRITY;
+    IO_DATA_LOSS       = sys::ZX_ERR_IO_DATA_LOSS;
+    BAD_PATH           = sys::ZX_ERR_BAD_PATH;
+    NOT_DIR            = sys::ZX_ERR_NOT_DIR;
+    NOT_FILE           = sys::ZX_ERR_NOT_FILE;
+    FILE_BIG           = sys::ZX_ERR_FILE_BIG;
+    NO_SPACE           = sys::ZX_ERR_NO_SPACE;
+    STOP               = sys::ZX_ERR_STOP;
+    NEXT               = sys::ZX_ERR_NEXT;
+]);
+
+impl Status {
+    pub fn into_io_error(self) -> io::Error {
+        self.into()
+    }
+}
+
+impl From<io::ErrorKind> for Status {
+    fn from(kind: io::ErrorKind) -> Self {
+        use std::io::ErrorKind::*;
+        match kind {
+            NotFound => Status::NOT_FOUND,
+            PermissionDenied => Status::ACCESS_DENIED,
+            ConnectionRefused => Status::IO_REFUSED,
+            ConnectionAborted => Status::PEER_CLOSED,
+            AddrInUse => Status::ALREADY_BOUND,
+            AddrNotAvailable => Status::UNAVAILABLE,
+            BrokenPipe => Status::PEER_CLOSED,
+            AlreadyExists => Status::ALREADY_EXISTS,
+            WouldBlock => Status::SHOULD_WAIT,
+            InvalidInput => Status::INVALID_ARGS,
+            TimedOut => Status::TIMED_OUT,
+            Interrupted => Status::INTERRUPTED_RETRY,
+            UnexpectedEof |
+            WriteZero |
+            ConnectionReset |
+            NotConnected |
+            Other | _ => Status::IO,
+        }
+    }
+}
+
+impl From<Status> for io::ErrorKind {
+    fn from(status: Status) -> io::ErrorKind {
+        use std::io::ErrorKind::*;
+        match status {
+            Status::INTERRUPTED_RETRY => Interrupted,
+            Status::BAD_HANDLE => BrokenPipe,
+            Status::TIMED_OUT => TimedOut,
+            Status::SHOULD_WAIT => WouldBlock,
+            Status::PEER_CLOSED => ConnectionAborted,
+            Status::NOT_FOUND => NotFound,
+            Status::ALREADY_EXISTS => AlreadyExists,
+            Status::ALREADY_BOUND => AlreadyExists,
+            Status::UNAVAILABLE => AddrNotAvailable,
+            Status::ACCESS_DENIED => PermissionDenied,
+            Status::IO_REFUSED => ConnectionRefused,
+            Status::IO_DATA_INTEGRITY => InvalidData,
+
+            Status::BAD_PATH |
+            Status::INVALID_ARGS |
+            Status::OUT_OF_RANGE |
+            Status::WRONG_TYPE => InvalidInput,
+
+            Status::OK |
+            Status::NEXT |
+            Status::STOP |
+            Status::NO_SPACE |
+            Status::FILE_BIG |
+            Status::NOT_FILE |
+            Status::NOT_DIR |
+            Status::IO_DATA_LOSS |
+            Status::IO |
+            Status::CANCELED |
+            Status::BAD_STATE |
+            Status::BUFFER_TOO_SMALL |
+            Status::BAD_SYSCALL |
+            Status::INTERNAL |
+            Status::NOT_SUPPORTED |
+            Status::NO_RESOURCES |
+            Status::NO_MEMORY |
+            Status::CALL_FAILED |
+            _ => Other,
+        }
+    }
+}
+
+impl From<io::Error> for Status {
+    fn from(err: io::Error) -> Status {
+        err.kind().into()
+    }
+}
+
+impl From<Status> for io::Error {
+    fn from(status: Status) -> io::Error {
+        io::Error::from(io::ErrorKind::from(status))
+    }
+}
+
+impl From<NulError> for Status {
+    fn from(_error: NulError) -> Status {
+        Status::INVALID_ARGS
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/thread.rs b/third_party/rust/fuchsia-zircon/src/thread.rs
new file mode 100644
index 0000000000..be482375d4
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/thread.rs
@@ -0,0 +1,14 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon thread.
+
+use {AsHandleRef, HandleBased, Handle, HandleRef};
+
+/// An object representing a Zircon thread.
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Thread(Handle);
+impl_handle_based!(Thread);
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/time.rs b/third_party/rust/fuchsia-zircon/src/time.rs
new file mode 100644
index 0000000000..1b1deaceed
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/time.rs
@@ -0,0 +1,346 @@
+// Copyright 2016 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon timer objects.
+
+use {AsHandleRef, ClockId, HandleBased, Handle, HandleRef, Status};
+use {sys, ok};
+use std::ops;
+use std::time as stdtime;
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub struct Duration(sys::zx_duration_t);
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub struct Time(sys::zx_time_t);
+
+impl From<stdtime::Duration> for Duration {
+    fn from(dur: stdtime::Duration) -> Self {
+        Duration::from_seconds(dur.as_secs()) +
+        Duration::from_nanos(dur.subsec_nanos() as u64)
+    }
+}
+
+impl From<Duration> for stdtime::Duration {
+    fn from(dur: Duration) -> Self {
+        let secs = dur.seconds();
+        let nanos = (dur.nanos() - (secs * 1_000_000_000)) as u32;
+        stdtime::Duration::new(secs, nanos)
+    }
+}
+
+impl ops::Add<Duration> for Time {
+    type Output = Time;
+    fn add(self, dur: Duration) -> Time {
+        Time::from_nanos(dur.nanos() + self.nanos())
+    }
+}
+
+impl ops::Add<Time> for Duration {
+    type Output = Time;
+    fn add(self, time: Time) -> Time {
+        Time::from_nanos(self.nanos() + time.nanos())
+    }
+}
+
+impl ops::Add for Duration {
+    type Output = Duration;
+    fn add(self, dur: Duration) -> Duration {
+        Duration::from_nanos(self.nanos() + dur.nanos())
+    }
+}
+
+impl ops::Sub for Duration {
+    type Output = Duration;
+    fn sub(self, dur: Duration) -> Duration {
+        Duration::from_nanos(self.nanos() - dur.nanos())
+    }
+}
+
+impl ops::Sub<Duration> for Time {
+    type Output = Time;
+    fn sub(self, dur: Duration) -> Time {
+        Time::from_nanos(self.nanos() - dur.nanos())
+    }
+}
+
+impl ops::AddAssign for Duration {
+    fn add_assign(&mut self, dur: Duration) {
+        self.0 += dur.nanos()
+    }
+}
+
+impl ops::SubAssign for Duration {
+    fn sub_assign(&mut self, dur: Duration) {
+        self.0 -= dur.nanos()
+    }
+}
+
+impl ops::AddAssign<Duration> for Time {
+    fn add_assign(&mut self, dur: Duration) {
+        self.0 += dur.nanos()
+    }
+}
+
+impl ops::SubAssign<Duration> for Time {
+    fn sub_assign(&mut self, dur: Duration) {
+        self.0 -= dur.nanos()
+    }
+}
+
+impl<T> ops::Mul<T> for Duration
+    where T: Into<u64>
+{
+    type Output = Self;
+    fn mul(self, mul: T) -> Self {
+        Duration::from_nanos(self.0 * mul.into())
+    }
+}
+
+impl<T> ops::Div<T> for Duration
+    where T: Into<u64>
+{
+    type Output = Self;
+    fn div(self, div: T) -> Self {
+        Duration::from_nanos(self.0 / div.into())
+    }
+}
+
+impl Duration {
+    /// Sleep for the given amount of time.
+    pub fn sleep(self) {
+        Time::after(self).sleep()
+    }
+
+    pub fn nanos(self) -> u64 {
+        self.0
+    }
+
+    pub fn millis(self) -> u64 {
+        self.0 / 1_000_000
+    }
+
+    pub fn seconds(self) -> u64 {
+        self.millis() / 1_000
+    }
+
+    pub fn minutes(self) -> u64 {
+        self.seconds() / 60
+    }
+
+    pub fn hours(self) -> u64 {
+        self.minutes() / 60
+    }
+
+    pub fn from_nanos(nanos: u64) -> Self {
+        Duration(nanos)
+    }
+
+    pub fn from_millis(millis: u64) -> Self {
+        Duration(millis * 1_000_000)
+    }
+
+    pub fn from_seconds(secs: u64) -> Self {
+        Duration::from_millis(secs * 1_000)
+    }
+
+    pub fn from_minutes(min: u64) -> Self {
+        Duration::from_seconds(min * 60)
+    }
+
+    pub fn from_hours(hours: u64) -> Self {
+        Duration::from_minutes(hours * 60)
+    }
+
+    /// Returns a `Time` which is a `Duration` after the current time.
+    /// `duration.after_now()` is equivalent to `Time::after(duration)`.
+    pub fn after_now(self) -> Time {
+        Time::after(self)
+    }
+}
+
+pub trait DurationNum: Sized {
+    fn nanos(self) -> Duration;
+    fn millis(self) -> Duration;
+    fn seconds(self) -> Duration;
+    fn minutes(self) -> Duration;
+    fn hours(self) -> Duration;
+
+    // Singular versions to allow for `1.milli()` and `1.second()`, etc.
+    fn milli(self) -> Duration { self.millis() }
+    fn second(self) -> Duration { self.seconds() }
+    fn minute(self) -> Duration { self.minutes() }
+    fn hour(self) -> Duration { self.hours() }
+}
+
+// Note: this could be implemented for other unsized integer types, but it doesn't seem
+// necessary to support the usual case.
+impl DurationNum for u64 {
+    fn nanos(self) -> Duration {
+        Duration::from_nanos(self)
+    }
+
+    fn millis(self) -> Duration {
+        Duration::from_millis(self)
+    }
+
+    fn seconds(self) -> Duration {
+        Duration::from_seconds(self)
+    }
+
+    fn minutes(self) -> Duration {
+        Duration::from_minutes(self)
+    }
+
+    fn hours(self) -> Duration {
+        Duration::from_hours(self)
+    }
+}
+
+impl Time {
+    pub const INFINITE: Time = Time(sys::ZX_TIME_INFINITE);
+
+    /// Get the current time, from the specific clock id.
+    ///
+    /// Wraps the
+    /// [zx_time_get](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/time_get.md)
+    /// syscall.
+    pub fn get(clock_id: ClockId) -> Time {
+        unsafe { Time(sys::zx_time_get(clock_id as u32)) }
+    }
+
+    /// Compute a deadline for the time in the future that is the given `Duration` away.
+    ///
+    /// Wraps the
+    /// [zx_deadline_after](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/deadline_after.md)
+    /// syscall.
+    pub fn after(duration: Duration) -> Time {
+        unsafe { Time(sys::zx_deadline_after(duration.0)) }
+    }
+
+    /// Sleep until the given time.
+    ///
+    /// Wraps the
+    /// [zx_nanosleep](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/nanosleep.md)
+    /// syscall.
+    pub fn sleep(self) {
+        unsafe { sys::zx_nanosleep(self.0); }
+    }
+
+    pub fn nanos(self) -> u64 {
+        self.0
+    }
+
+    pub fn from_nanos(nanos: u64) -> Self {
+        Time(nanos)
+    }
+}
+
+/// Read the number of high-precision timer ticks since boot. These ticks may be processor cycles,
+/// high speed timer, profiling timer, etc. They are not guaranteed to continue advancing when the
+/// system is asleep.
+///
+/// Wraps the
+/// [zx_ticks_get](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/ticks_get.md)
+/// syscall.
+pub fn ticks_get() -> u64 {
+    unsafe { sys::zx_ticks_get() }
+}
+
+/// Return the number of high-precision timer ticks in a second.
+///
+/// Wraps the
+/// [zx_ticks_per_second](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/ticks_per_second.md)
+/// syscall.
+pub fn ticks_per_second() -> u64 {
+    unsafe { sys::zx_ticks_per_second() }
+}
+
+/// An object representing a Zircon timer, such as the one returned by
+/// [zx_timer_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/timer_create.md).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Timer(Handle);
+impl_handle_based!(Timer);
+
+impl Timer {
+    /// Create a timer, an object that can signal when a specified point in time has been reached.
+    /// Wraps the
+    /// [zx_timer_create](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/timer_create.md)
+    /// syscall.
+    pub fn create(clock_id: ClockId) -> Result<Timer, Status> {
+        let mut out = 0;
+        let opts = 0;
+        let status = unsafe { sys::zx_timer_create(opts, clock_id as u32, &mut out) };
+        ok(status)?;
+        unsafe {
+            Ok(Self::from(Handle::from_raw(out)))
+        }
+    }
+
+    /// Start a one-shot timer that will fire when `deadline` passes. Wraps the
+    /// [zx_timer_set](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/timer_set.md)
+    /// syscall.
+    pub fn set(&self, deadline: Time, slack: Duration) -> Result<(), Status> {
+        let status = unsafe {
+            sys::zx_timer_set(self.raw_handle(), deadline.nanos(), slack.nanos())
+        };
+        ok(status)
+    }
+
+    /// Cancels a pending timer that was started with start(). Wraps the
+    /// [zx_timer_cancel](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/timer_cancel.md)
+    /// syscall.
+    pub fn cancel(&self) -> Result<(), Status> {
+        let status = unsafe { sys::zx_timer_cancel(self.raw_handle()) };
+        ok(status)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use Signals;
+
+    #[test]
+    fn create_timer_invalid_clock() {
+        assert_eq!(Timer::create(ClockId::UTC).unwrap_err(), Status::INVALID_ARGS);
+        assert_eq!(Timer::create(ClockId::Thread), Err(Status::INVALID_ARGS));
+    }
+
+    #[test]
+    fn into_from_std() {
+        let std_dur = stdtime::Duration::new(25, 25);
+        assert_eq!(std_dur, stdtime::Duration::from(Duration::from(std_dur)));
+    }
+
+    #[test]
+    fn timer_basic() {
+        let slack = 0.millis();
+        let ten_ms = 10.millis();
+        let five_secs = 5.seconds();
+        let six_secs = 6.seconds();
+
+        // Create a timer
+        let timer = Timer::create(ClockId::Monotonic).unwrap();
+
+        // Should not signal yet.
+        assert_eq!(
+            timer.wait_handle(Signals::TIMER_SIGNALED, ten_ms.after_now()),
+            Err(Status::TIMED_OUT));
+
+        // Set it, and soon it should signal.
+        assert_eq!(timer.set(five_secs.after_now(), slack), Ok(()));
+        assert_eq!(
+            timer.wait_handle(Signals::TIMER_SIGNALED, six_secs.after_now()),
+            Ok(Signals::TIMER_SIGNALED));
+
+        // Cancel it, and it should stop signalling.
+        assert_eq!(timer.cancel(), Ok(()));
+        assert_eq!(
+            timer.wait_handle(Signals::TIMER_SIGNALED, ten_ms.after_now()),
+            Err(Status::TIMED_OUT));
+    }
+}
diff --git a/third_party/rust/fuchsia-zircon/src/vmar.rs b/third_party/rust/fuchsia-zircon/src/vmar.rs
new file mode 100644
index 0000000000..a828195df4
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/vmar.rs
@@ -0,0 +1,18 @@
+use sys;
+
+bitflags! {
+    /// Flags to VMAR routines
+    #[repr(C)]
+    pub struct VmarFlags: u32 {
+        const PERM_READ          = sys::ZX_VM_FLAG_PERM_READ;
+        const PERM_WRITE         = sys::ZX_VM_FLAG_PERM_WRITE;
+        const PERM_EXECUTE       = sys::ZX_VM_FLAG_PERM_EXECUTE;
+        const COMPACT            = sys::ZX_VM_FLAG_COMPACT;
+        const SPECIFIC           = sys::ZX_VM_FLAG_SPECIFIC;
+        const SPECIFIC_OVERWRITE = sys::ZX_VM_FLAG_SPECIFIC_OVERWRITE;
+        const CAN_MAP_SPECIFIC   = sys::ZX_VM_FLAG_CAN_MAP_SPECIFIC;
+        const CAN_MAP_READ       = sys::ZX_VM_FLAG_CAN_MAP_READ;
+        const CAN_MAP_WRITE      = sys::ZX_VM_FLAG_CAN_MAP_WRITE;
+        const CAN_MAP_EXECUTE    = sys::ZX_VM_FLAG_CAN_MAP_EXECUTE;
+    }
+}
\ No newline at end of file
diff --git a/third_party/rust/fuchsia-zircon/src/vmo.rs b/third_party/rust/fuchsia-zircon/src/vmo.rs
new file mode 100644
index 0000000000..68c86b5429
--- /dev/null
+++ b/third_party/rust/fuchsia-zircon/src/vmo.rs
@@ -0,0 +1,256 @@
+// Copyright 2017 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for Zircon vmo objects.
+
+use {AsHandleRef, Cookied, HandleBased, Handle, HandleRef, Status};
+use {sys, ok};
+use std::{mem, ptr};
+
+/// An object representing a Zircon
+/// [virtual memory object](https://fuchsia.googlesource.com/zircon/+/master/docs/objects/vm_object.md).
+///
+/// As essentially a subtype of `Handle`, it can be freely interconverted.
+#[derive(Debug, Eq, PartialEq)]
+pub struct Vmo(Handle);
+impl_handle_based!(Vmo);
+impl Cookied for Vmo {}
+
+impl Vmo {
+    /// Create a virtual memory object.
+    ///
+    /// Wraps the
+    /// `zx_vmo_create`
+    /// syscall. See the
+    /// [Shared Memory: Virtual Memory Objects (VMOs)](https://fuchsia.googlesource.com/zircon/+/master/docs/concepts.md#Shared-Memory_Virtual-Memory-Objects-VMOs)
+    /// for more information.
+    pub fn create(size: u64) -> Result<Vmo, Status> {
+        let mut handle = 0;
+        let opts = 0;
+        let status = unsafe { sys::zx_vmo_create(size, opts, &mut handle) };
+        ok(status)?;
+        unsafe {
+            Ok(Vmo::from(Handle::from_raw(handle)))
+        }
+    }
+
+    /// Read from a virtual memory object.
+    ///
+    /// Wraps the `zx_vmo_read` syscall.
+    pub fn read(&self, data: &mut [u8], offset: u64) -> Result<usize, Status> {
+        unsafe {
+            let mut actual = 0;
+            let status = sys::zx_vmo_read(self.raw_handle(), data.as_mut_ptr(),
+                offset, data.len(), &mut actual);
+            ok(status).map(|()| actual)
+        }
+    }
+
+    /// Write to a virtual memory object.
+    ///
+    /// Wraps the `zx_vmo_write` syscall.
+    pub fn write(&self, data: &[u8], offset: u64) -> Result<usize, Status> {
+        unsafe {
+            let mut actual = 0;
+            let status = sys::zx_vmo_write(self.raw_handle(), data.as_ptr(),
+                offset, data.len(), &mut actual);
+            ok(status).map(|()| actual)
+        }
+    }
+
+    /// Get the size of a virtual memory object.
+    ///
+    /// Wraps the `zx_vmo_get_size` syscall.
+    pub fn get_size(&self) -> Result<u64, Status> {
+        let mut size = 0;
+        let status = unsafe { sys::zx_vmo_get_size(self.raw_handle(), &mut size) };
+        ok(status).map(|()| size)
+    }
+
+    /// Attempt to change the size of a virtual memory object.
+    ///
+    /// Wraps the `zx_vmo_set_size` syscall.
+    pub fn set_size(&self, size: u64) -> Result<(), Status> {
+        let status = unsafe { sys::zx_vmo_set_size(self.raw_handle(), size) };
+        ok(status)
+    }
+
+    /// Perform an operation on a range of a virtual memory object.
+    ///
+    /// Wraps the
+    /// [zx_vmo_op_range](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/vmo_op_range.md)
+    /// syscall.
+    pub fn op_range(&self, op: VmoOp, offset: u64, size: u64) -> Result<(), Status> {
+        let status = unsafe {
+            sys::zx_vmo_op_range(self.raw_handle(), op.into_raw(), offset, size, ptr::null_mut(), 0)
+        };
+        ok(status)
+    }
+
+    /// Look up a list of physical addresses corresponding to the pages held by the VMO from
+    /// `offset` to `offset`+`size`, and store them in `buffer`.
+    ///
+    /// Wraps the
+    /// [zx_vmo_op_range](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/vmo_op_range.md)
+    /// syscall with ZX_VMO_OP_LOOKUP.
+    pub fn lookup(&self, offset: u64, size: u64, buffer: &mut [sys::zx_paddr_t])
+        -> Result<(), Status>
+    {
+        let status = unsafe {
+            sys::zx_vmo_op_range(self.raw_handle(), VmoOp::LOOKUP.into_raw(), offset, size,
+                buffer.as_mut_ptr() as *mut u8, buffer.len() * mem::size_of::<sys::zx_paddr_t>())
+        };
+        ok(status)
+    }
+
+    /// Create a new virtual memory object that clones a range of this one.
+    ///
+    /// Wraps the
+    /// [zx_vmo_clone](https://fuchsia.googlesource.com/zircon/+/master/docs/syscalls/vmo_clone.md)
+    /// syscall.
+    pub fn clone(&self, offset: u64, size: u64) -> Result<Vmo, Status> {
+        let mut out = 0;
+        let opts = sys::ZX_VMO_CLONE_COPY_ON_WRITE;
+        let status = unsafe {
+            sys::zx_vmo_clone(self.raw_handle(), opts, offset, size, &mut out)
+        };
+        ok(status)?;
+        unsafe { Ok(Vmo::from(Handle::from_raw(out))) }
+    }
+}
+
+/// VM Object opcodes
+#[repr(C)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub struct VmoOp(u32);
+impl VmoOp {
+    pub fn from_raw(raw: u32) -> VmoOp {
+        VmoOp(raw)
+    }
+    pub fn into_raw(self) -> u32 {
+        self.0
+    }
+}
+
+assoc_consts!(VmoOp, [
+    COMMIT =           sys::ZX_VMO_OP_COMMIT;
+    DECOMMIT =         sys::ZX_VMO_OP_DECOMMIT;
+    LOCK =             sys::ZX_VMO_OP_LOCK;
+    UNLOCK =           sys::ZX_VMO_OP_UNLOCK;
+    LOOKUP =           sys::ZX_VMO_OP_LOOKUP;
+    CACHE_SYNC =       sys::ZX_VMO_OP_CACHE_SYNC;
+    CACHE_INVALIDATE = sys::ZX_VMO_OP_CACHE_INVALIDATE;
+    CACHE_CLEAN =      sys::ZX_VMO_OP_CACHE_CLEAN;
+    CACHE_CLEAN_INVALIDATE = sys::ZX_VMO_OP_CACHE_CLEAN_INVALIDATE;
+]);
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn vmo_get_size() {
+        let size = 16 * 1024 * 1024;
+        let vmo = Vmo::create(size).unwrap();
+        assert_eq!(size, vmo.get_size().unwrap());
+    }
+
+    #[test]
+    fn vmo_set_size() {
+        let start_size = 12;
+        let vmo = Vmo::create(start_size).unwrap();
+        assert_eq!(start_size, vmo.get_size().unwrap());
+
+        // Change the size and make sure the new size is reported
+        let new_size = 23;
+        assert!(vmo.set_size(new_size).is_ok());
+        assert_eq!(new_size, vmo.get_size().unwrap());
+    }
+
+    #[test]
+    fn vmo_read_write() {
+        let mut vec1 = vec![0; 16];
+        let vmo = Vmo::create(vec1.len() as u64).unwrap();
+        assert_eq!(vmo.write(b"abcdef", 0), Ok(6));
+        assert_eq!(16, vmo.read(&mut vec1, 0).unwrap());
+        assert_eq!(b"abcdef", &vec1[0..6]);
+        assert_eq!(vmo.write(b"123", 2), Ok(3));
+        assert_eq!(16, vmo.read(&mut vec1, 0).unwrap());
+        assert_eq!(b"ab123f", &vec1[0..6]);
+        assert_eq!(15, vmo.read(&mut vec1, 1).unwrap());
+        assert_eq!(b"b123f", &vec1[0..5]);
+    }
+
+    #[test]
+    fn vmo_op_range_unsupported() {
+        let vmo = Vmo::create(12).unwrap();
+        assert_eq!(vmo.op_range(VmoOp::LOCK, 0, 1), Err(Status::NOT_SUPPORTED));
+        assert_eq!(vmo.op_range(VmoOp::UNLOCK, 0, 1), Err(Status::NOT_SUPPORTED));
+    }
+
+    #[test]
+    fn vmo_lookup() {
+        let vmo = Vmo::create(12).unwrap();
+        let mut buffer = vec![0; 2];
+
+        // Lookup will fail as it is not committed yet.
+        assert_eq!(vmo.lookup(0, 12, &mut buffer), Err(Status::NO_MEMORY));
+
+        // COMMIT and try again.
+        assert_eq!(vmo.op_range(VmoOp::COMMIT, 0, 12), Ok(()));
+        assert_eq!(vmo.lookup(0, 12, &mut buffer), Ok(()));
+        assert_ne!(buffer[0], 0);
+        assert_eq!(buffer[1], 0);
+
+        // If we decommit then lookup should go back to failing.
+        assert_eq!(vmo.op_range(VmoOp::DECOMMIT, 0, 12), Ok(()));
+        assert_eq!(vmo.lookup(0, 12, &mut buffer), Err(Status::NO_MEMORY));
+    }
+
+    #[test]
+    fn vmo_cache() {
+        let vmo = Vmo::create(12).unwrap();
+
+        // Cache operations should all succeed.
+        assert_eq!(vmo.op_range(VmoOp::CACHE_SYNC, 0, 12), Ok(()));
+        assert_eq!(vmo.op_range(VmoOp::CACHE_INVALIDATE, 0, 12), Ok(()));
+        assert_eq!(vmo.op_range(VmoOp::CACHE_CLEAN, 0, 12), Ok(()));
+        assert_eq!(vmo.op_range(VmoOp::CACHE_CLEAN_INVALIDATE, 0, 12), Ok(()));
+    }
+
+    #[test]
+    fn vmo_clone() {
+        let original = Vmo::create(12).unwrap();
+        assert_eq!(original.write(b"one", 0), Ok(3));
+
+        // Clone the VMO, and make sure it contains what we expect.
+        let clone = original.clone(0, 10).unwrap();
+        let mut read_buffer = vec![0; 16];
+        assert_eq!(clone.read(&mut read_buffer, 0), Ok(10));
+        assert_eq!(&read_buffer[0..3], b"one");
+
+        // Writing to the original will affect the clone too, surprisingly.
+        assert_eq!(original.write(b"two", 0), Ok(3));
+        assert_eq!(original.read(&mut read_buffer, 0), Ok(12));
+        assert_eq!(&read_buffer[0..3], b"two");
+        assert_eq!(clone.read(&mut read_buffer, 0), Ok(10));
+        assert_eq!(&read_buffer[0..3], b"two");
+
+        // However, writing to the clone will not affect the original
+        assert_eq!(clone.write(b"three", 0), Ok(5));
+        assert_eq!(original.read(&mut read_buffer, 0), Ok(12));
+        assert_eq!(&read_buffer[0..3], b"two");
+        assert_eq!(clone.read(&mut read_buffer, 0), Ok(10));
+        assert_eq!(&read_buffer[0..5], b"three");
+
+        // And now that the copy-on-write has happened, writing to the original will not affect the
+        // clone. How bizarre.
+        assert_eq!(original.write(b"four", 0), Ok(4));
+        assert_eq!(original.read(&mut read_buffer, 0), Ok(12));
+        assert_eq!(&read_buffer[0..4], b"four");
+        assert_eq!(clone.read(&mut read_buffer, 0), Ok(10));
+        assert_eq!(&read_buffer[0..5], b"three");
+    }
+}