Auto merge of rust-lang#138866 - compiler-errors:rollup-9d8v3mz, r=compiler-errors

Rollup of 12 pull requests

Successful merges:

 - rust-lang#136040 (Remove unused trait BoundedSize)
 - rust-lang#138236 (uefi: Add OwnedEvent abstraction)
 - rust-lang#138293 (rustdoc: Gate unstable `doc(cfg())` predicates)
 - rust-lang#138509 (Add test to ensure no index out of bounds panic (rust-lang#135474))
 - rust-lang#138545 (Add MIR pre-codegen tests to track rust-lang#138544)
 - rust-lang#138631 (Update test for SGX now implementing `read_buf`)
 - rust-lang#138641 (Add unstable `--print=supported-crate-types` option)
 - rust-lang#138667 (std: uefi: fs: Implement mkdir)
 - rust-lang#138849 (doc: rename reference #create-a-configtoml to #create-a-bootstraptoml)
 - rust-lang#138854 (Fix ICE rust-lang#138415 for invalid extern function body)
 - rust-lang#138858 (Say which test failed the `COMPILETEST_REQUIRE_ALL_LLVM_COMPONENTS` assertion)
 - rust-lang#138861 (Tweak type flags, fix missing flags from coroutine kind ty)

Failed merges:

 - rust-lang#138755 ([rustdoc] Remove duplicated loop when computing doc cfgs)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

library/std/src/net/tcp/tests.rs

@@ -315,12 +315,8 @@ fn read_buf() {
         let mut buf = BorrowedBuf::from(buf.as_mut_slice());
         t!(s.read_buf(buf.unfilled()));
         assert_eq!(buf.filled(), &[1, 2, 3, 4]);
-
-        // FIXME: sgx uses default_read_buf that initializes the buffer.
-        if cfg!(not(target_env = "sgx")) {
-            // TcpStream::read_buf should omit buffer initialization.
-            assert_eq!(buf.init_len(), 4);
-        }
+        // TcpStream::read_buf should omit buffer initialization.
+        assert_eq!(buf.init_len(), 4);
 
         t.join().ok().expect("thread panicked");
     })

library/std/src/sys/fs/uefi.rs

@@ -36,7 +36,7 @@ pub struct FilePermissions(bool);
 pub struct FileType(bool);
 
 #[derive(Debug)]
-pub struct DirBuilder {}
+pub struct DirBuilder;
 
 impl FileAttr {
     pub fn size(&self) -> u64 {
@@ -248,11 +248,11 @@ impl File {
 
 impl DirBuilder {
     pub fn new() -> DirBuilder {
-        DirBuilder {}
+        DirBuilder
     }
 
-    pub fn mkdir(&self, _p: &Path) -> io::Result<()> {
-        unsupported()
+    pub fn mkdir(&self, p: &Path) -> io::Result<()> {
+        uefi_fs::mkdir(p)
     }
 }
 
@@ -452,4 +452,30 @@ mod uefi_fs {
             }
         }
     }
+
+    /// An implementation of mkdir to allow creating new directory without having to open the
+    /// volume twice (once for checking and once for creating)
+    pub(crate) fn mkdir(path: &Path) -> io::Result<()> {
+        let absolute = crate::path::absolute(path)?;
+
+        let p = helpers::OwnedDevicePath::from_text(absolute.as_os_str())?;
+        let (vol, mut path_remaining) = File::open_volume_from_device_path(p.borrow())?;
+
+        // Check if file exists
+        match vol.open(&mut path_remaining, file::MODE_READ, 0) {
+            Ok(_) => {
+                return Err(io::Error::new(io::ErrorKind::AlreadyExists, "Path already exists"));
+            }
+            Err(e) if e.kind() == io::ErrorKind::NotFound => {}
+            Err(e) => return Err(e),
+        }
+
+        let _ = vol.open(
+            &mut path_remaining,
+            file::MODE_READ | file::MODE_WRITE | file::MODE_CREATE,
+            file::DIRECTORY,
+        )?;
+
+        Ok(())
+    }
 }