4 files changed, 30 insertions, 3 deletions
diff --git a/library/std/src/sys/pal/windows/c/bindings.txt b/library/std/src/sys/pal/windows/c/bindings.txt
index 5ad4a3731d8..7423bbe7694 100644
--- a/library/std/src/sys/pal/windows/c/bindings.txt
+++ b/library/std/src/sys/pal/windows/c/bindings.txt
@@ -2462,6 +2462,7 @@ Windows.Win32.System.LibraryLoader.GetProcAddress
 Windows.Win32.System.Performance.QueryPerformanceCounter
 Windows.Win32.System.Performance.QueryPerformanceFrequency
 Windows.Win32.System.Pipes.CreateNamedPipeW
+Windows.Win32.System.Pipes.CreatePipe
 Windows.Win32.System.Pipes.NAMED_PIPE_MODE
 Windows.Win32.System.Pipes.PIPE_ACCEPT_REMOTE_CLIENTS
 Windows.Win32.System.Pipes.PIPE_CLIENT_END
diff --git a/library/std/src/sys/pal/windows/c/windows_sys.rs b/library/std/src/sys/pal/windows/c/windows_sys.rs
index fea00fec9ae..91c7d7ebc5e 100644
--- a/library/std/src/sys/pal/windows/c/windows_sys.rs
+++ b/library/std/src/sys/pal/windows/c/windows_sys.rs
@@ -14,6 +14,7 @@ windows_targets::link!("kernel32.dll" "system" fn CreateEventW(lpeventattributes
 windows_targets::link!("kernel32.dll" "system" fn CreateFileW(lpfilename : PCWSTR, dwdesiredaccess : u32, dwsharemode : FILE_SHARE_MODE, lpsecurityattributes : *const SECURITY_ATTRIBUTES, dwcreationdisposition : FILE_CREATION_DISPOSITION, dwflagsandattributes : FILE_FLAGS_AND_ATTRIBUTES, htemplatefile : HANDLE) -> HANDLE);
 windows_targets::link!("kernel32.dll" "system" fn CreateHardLinkW(lpfilename : PCWSTR, lpexistingfilename : PCWSTR, lpsecurityattributes : *const SECURITY_ATTRIBUTES) -> BOOL);
 windows_targets::link!("kernel32.dll" "system" fn CreateNamedPipeW(lpname : PCWSTR, dwopenmode : FILE_FLAGS_AND_ATTRIBUTES, dwpipemode : NAMED_PIPE_MODE, nmaxinstances : u32, noutbuffersize : u32, ninbuffersize : u32, ndefaulttimeout : u32, lpsecurityattributes : *const SECURITY_ATTRIBUTES) -> HANDLE);
+windows_targets::link!("kernel32.dll" "system" fn CreatePipe(hreadpipe : *mut HANDLE, hwritepipe : *mut HANDLE, lppipeattributes : *const SECURITY_ATTRIBUTES, nsize : u32) -> BOOL);
 windows_targets::link!("kernel32.dll" "system" fn CreateProcessW(lpapplicationname : PCWSTR, lpcommandline : PWSTR, lpprocessattributes : *const SECURITY_ATTRIBUTES, lpthreadattributes : *const SECURITY_ATTRIBUTES, binherithandles : BOOL, dwcreationflags : PROCESS_CREATION_FLAGS, lpenvironment : *const core::ffi::c_void, lpcurrentdirectory : PCWSTR, lpstartupinfo : *const STARTUPINFOW, lpprocessinformation : *mut PROCESS_INFORMATION) -> BOOL);
 windows_targets::link!("kernel32.dll" "system" fn CreateSymbolicLinkW(lpsymlinkfilename : PCWSTR, lptargetfilename : PCWSTR, dwflags : SYMBOLIC_LINK_FLAGS) -> BOOLEAN);
 windows_targets::link!("kernel32.dll" "system" fn CreateThread(lpthreadattributes : *const SECURITY_ATTRIBUTES, dwstacksize : usize, lpstartaddress : LPTHREAD_START_ROUTINE, lpparameter : *const core::ffi::c_void, dwcreationflags : THREAD_CREATION_FLAGS, lpthreadid : *mut u32) -> HANDLE);
diff --git a/library/std/src/sys/pal/windows/handle.rs b/library/std/src/sys/pal/windows/handle.rs
index aaa1831dcc2..706062ab984 100644
--- a/library/std/src/sys/pal/windows/handle.rs
+++ b/library/std/src/sys/pal/windows/handle.rs
@@ -17,6 +17,7 @@ use crate::sys_common::{AsInner, FromInner, IntoInner};
 /// An owned container for `HANDLE` object, closing them on Drop.
 ///
 /// All methods are inherited through a `Deref` impl to `RawHandle`
+#[derive(Debug)]
 pub struct Handle(OwnedHandle);
 
 impl Handle {
@@ -136,6 +137,12 @@ impl Handle {
         }
     }
 
+    pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
+        let mut me = self;
+
+        Read::read_to_end(&mut me, buf)
+    }
+
     pub unsafe fn read_overlapped(
         &self,
         buf: &mut [mem::MaybeUninit<u8>],
diff --git a/library/std/src/sys/pal/windows/pipe.rs b/library/std/src/sys/pal/windows/pipe.rs
index 7a309b9638b..d5e2356116f 100644
--- a/library/std/src/sys/pal/windows/pipe.rs
+++ b/library/std/src/sys/pal/windows/pipe.rs
@@ -1,7 +1,7 @@
 use crate::os::windows::prelude::*;
 
 use crate::ffi::OsStr;
-use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut, Read};
+use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut};
 use crate::mem;
 use crate::path::Path;
 use crate::ptr;
@@ -39,6 +39,23 @@ pub struct Pipes {
     pub theirs: AnonPipe,
 }
 
+/// Create true unnamed anonymous pipe.
+pub fn unnamed_anon_pipe() -> io::Result<(AnonPipe, AnonPipe)> {
+    let mut read_pipe = c::INVALID_HANDLE_VALUE;
+    let mut write_pipe = c::INVALID_HANDLE_VALUE;
+
+    let ret = unsafe { c::CreatePipe(&mut read_pipe, &mut write_pipe, ptr::null_mut(), 0) };
+
+    if ret == 0 {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok((
+            AnonPipe::from_inner(unsafe { Handle::from_raw_handle(read_pipe) }),
+            AnonPipe::from_inner(unsafe { Handle::from_raw_handle(write_pipe) }),
+        ))
+    }
+}
+
 /// Although this looks similar to `anon_pipe` in the Unix module it's actually
 /// subtly different. Here we'll return two pipes in the `Pipes` return value,
 /// but one is intended for "us" where as the other is intended for "someone
@@ -181,7 +198,7 @@ pub fn spawn_pipe_relay(
     their_handle_inheritable: bool,
 ) -> io::Result<AnonPipe> {
     // We need this handle to live for the lifetime of the thread spawned below.
-    let source = source.duplicate()?;
+    let source = source.try_clone()?;
 
     // create a new pair of anon pipes.
     let Pipes { theirs, ours } = anon_pipe(ours_readable, their_handle_inheritable)?;
@@ -237,7 +254,8 @@ impl AnonPipe {
     pub fn into_handle(self) -> Handle {
         self.inner
     }
-    fn duplicate(&self) -> io::Result<Self> {
+
+    pub fn try_clone(&self) -> io::Result<Self> {
         self.inner.duplicate(0, false, c::DUPLICATE_SAME_ACCESS).map(|inner| AnonPipe { inner })
     }