STD support for the ESP-IDF framework

Author: imarkov

Cargo.lock

@@ -10,7 +10,7 @@ doctest = false
 [dependencies]
 either = "1.5.0"
 rustc_graphviz = { path = "../rustc_graphviz" }
-gsgdt = "0.1.2"
+gsgdt = "=0.1.2"
 itertools = "0.9"
 tracing = "0.1"
 polonius-engine = "0.12.0"

compiler/rustc_mir/Cargo.toml

@@ -16,5 +16,5 @@ doc = false
 alloc = { path = "../alloc" }
 cfg-if = { version = "0.1.8", features = ['rustc-dep-of-std'] }
 core = { path = "../core" }
-libc = { git = "https://github.com/ivmarkov/libc.git", default-features = false }
+libc = { git = "https://github.com/rust-lang/libc.git", default-features = false }
 compiler_builtins = "0.1.0"

library/panic_abort/Cargo.toml

@@ -15,7 +15,7 @@ doc = false
 [dependencies]
 alloc = { path = "../alloc" }
 core = { path = "../core" }
-libc = { git = "https://github.com/ivmarkov/libc.git", default-features = false }
+libc = { git = "https://github.com/rust-lang/libc.git", default-features = false }
 unwind = { path = "../unwind" }
 compiler_builtins = "0.1.0"
 cfg-if = "0.1.8"

library/panic_unwind/Cargo.toml

@@ -46,7 +46,7 @@ cfg_if::cfg_if! {
     } else if #[cfg(any(
         all(target_family = "windows", target_env = "gnu"),
         target_os = "psp",
-        target_family = "unix",
+        all(target_family = "unix", not(target_os = "espidf")),
         all(target_vendor = "fortanix", target_env = "sgx"),
     ))] {
         // Rust runtime's startup objects depend on these symbols, so make them public.
@@ -59,6 +59,7 @@ cfg_if::cfg_if! {
         // - arch=wasm32
         // - os=none ("bare metal" targets)
         // - os=uefi
+        // - os=espidf
         // - nvptx64-nvidia-cuda
         // - arch=avr
         #[path = "dummy.rs"]

library/panic_unwind/src/lib.rs

@@ -16,7 +16,7 @@ cfg-if = { version = "0.1.8", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core" }
-libc = { git = "https://github.com/ivmarkov/libc.git", default-features = false, features = ['rustc-dep-of-std'] }
+libc = { git = "https://github.com/rust-lang/libc.git", default-features = false, features = ['rustc-dep-of-std'] }
 compiler_builtins = { version = "0.1.44" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }

library/std/Cargo.toml

@@ -26,6 +26,7 @@ fn main() {
         || target.contains("vxworks")
         || target.contains("wasm32")
         || target.contains("asmjs")
+        || target.contains("espidf")
     {
         // These platforms don't have any special requirements.
     } else {

library/std/build.rs

@@ -0,0 +1,126 @@
+#![stable(feature = "metadata_ext", since = "1.1.0")]
+
+use crate::fs::Metadata;
+use crate::sys_common::AsInner;
+
+#[allow(deprecated)]
+use crate::os::espidf::raw;
+
+/// OS-specific extensions to [`fs::Metadata`].
+///
+/// [`fs::Metadata`]: crate::fs::Metadata
+#[stable(feature = "metadata_ext", since = "1.1.0")]
+pub trait MetadataExt {
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    #[rustc_deprecated(
+        since = "1.8.0",
+        reason = "deprecated in favor of the accessor \
+                  methods of this trait"
+    )]
+    #[allow(deprecated)]
+    fn as_raw_stat(&self) -> &raw::stat;
+
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_dev(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_ino(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_mode(&self) -> u32;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_nlink(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_uid(&self) -> u32;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_gid(&self) -> u32;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_rdev(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_size(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_atime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_atime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_mtime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_mtime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_ctime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_ctime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_crtime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_crtime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_blksize(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_blocks(&self) -> u64;
+}
+
+#[stable(feature = "metadata_ext", since = "1.1.0")]
+impl MetadataExt for Metadata {
+    #[allow(deprecated)]
+    fn as_raw_stat(&self) -> &raw::stat {
+        unsafe { &*(self.as_inner().as_inner() as *const libc::stat as *const raw::stat) }
+    }
+    fn st_dev(&self) -> u64 {
+        self.as_inner().as_inner().st_dev as u64
+    }
+    fn st_ino(&self) -> u64 {
+        self.as_inner().as_inner().st_ino as u64
+    }
+    fn st_mode(&self) -> u32 {
+        self.as_inner().as_inner().st_mode as u32
+    }
+    fn st_nlink(&self) -> u64 {
+        self.as_inner().as_inner().st_nlink as u64
+    }
+    fn st_uid(&self) -> u32 {
+        self.as_inner().as_inner().st_uid as u32
+    }
+    fn st_gid(&self) -> u32 {
+        self.as_inner().as_inner().st_gid as u32
+    }
+    fn st_rdev(&self) -> u64 {
+        self.as_inner().as_inner().st_rdev as u64
+    }
+    fn st_size(&self) -> u64 {
+        self.as_inner().as_inner().st_size as u64
+    }
+    fn st_atime(&self) -> i64 {
+        self.as_inner().as_inner().st_atime as i64
+    }
+    fn st_atime_nsec(&self) -> i64 {
+        //self.as_inner().as_inner().st_atime_nsec as i64
+        0
+    }
+    fn st_mtime(&self) -> i64 {
+        self.as_inner().as_inner().st_mtime as i64
+    }
+    fn st_mtime_nsec(&self) -> i64 {
+        //self.as_inner().as_inner().st_mtime_nsec as i64
+        0
+    }
+    fn st_ctime(&self) -> i64 {
+        self.as_inner().as_inner().st_ctime as i64
+    }
+    fn st_ctime_nsec(&self) -> i64 {
+        //self.as_inner().as_inner().st_ctime_nsec as i64
+        0
+    }
+    fn st_crtime(&self) -> i64 {
+        //self.as_inner().as_inner().st_crtime as i64
+        0
+    }
+    fn st_crtime_nsec(&self) -> i64 {
+        //self.as_inner().as_inner().st_crtime_nsec as i64
+        0
+    }
+    fn st_blksize(&self) -> u64 {
+        self.as_inner().as_inner().st_blksize as u64
+    }
+    fn st_blocks(&self) -> u64 {
+        self.as_inner().as_inner().st_blocks as u64
+    }
+}

library/std/src/os/espidf/fs.rs

@@ -0,0 +1,7 @@
+//! Definitions for the ESP-IDF framework.
+
+// FIXME: Figure out if these can be proclaimed as "stable" and if yes, since what version
+#![stable(feature = "raw_ext", since = "1.1.0")]
+
+pub mod fs;
+pub mod raw;

library/std/src/os/espidf/mod.rs

@@ -0,0 +1,74 @@
+//! Raw type definitions for the ESP-IDF framework.
+
+#![stable(feature = "raw_ext", since = "1.1.0")]
+#![allow(deprecated)]
+
+use crate::os::raw::c_long;
+use crate::os::unix::raw::{gid_t, uid_t};
+
+// Use the direct definition of usize, instead of uintptr_t like in libc
+#[stable(feature = "pthread_t", since = "1.8.0")]
+pub type pthread_t = libc::pthread_t;
+
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type blkcnt_t = libc::blkcnt_t;
+
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type blksize_t = libc::blksize_t;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type dev_t = libc::dev_t;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type ino_t = libc::ino_t;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type mode_t = libc::mode_t;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type nlink_t = libc::nlink_t;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type off_t = libc::off_t;
+
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type time_t = libc::time_t;
+
+#[repr(C)]
+#[derive(Clone)]
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub struct stat {
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_dev: dev_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_ino: ino_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_mode: mode_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_nlink: nlink_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_uid: uid_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_gid: gid_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_rdev: dev_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_size: off_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_atime: time_t,
+    // #[stable(feature = "raw_ext", since = "1.1.0")]
+    // pub st_atime_nsec: c_long,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_mtime: time_t,
+    // #[stable(feature = "raw_ext", since = "1.1.0")]
+    // pub st_mtime_nsec: c_long,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_ctime: time_t,
+    // #[stable(feature = "raw_ext", since = "1.1.0")]
+    // pub st_ctime_nsec: c_long,
+    // #[stable(feature = "raw_ext", since = "1.1.0")]
+    // pub st_crtime: time_t,
+    // #[stable(feature = "raw_ext", since = "1.1.0")]
+    // pub st_crtime_nsec: c_long,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_blksize: blksize_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_blocks: blkcnt_t,
+    // #[stable(feature = "raw_ext", since = "1.1.0")]
+    // pub st_type: u32,
+}

library/std/src/os/espidf/raw.rs

@@ -80,6 +80,8 @@ mod imp {
     pub mod dragonfly;
     #[cfg(target_os = "emscripten")]
     pub mod emscripten;
+    #[cfg(target_os = "espidf")]
+    pub mod espidf;
     #[cfg(target_os = "freebsd")]
     pub mod freebsd;
     #[cfg(target_os = "fuchsia")]

library/std/src/os/mod.rs

@@ -40,6 +40,8 @@ mod platform {
     pub use crate::os::dragonfly::*;
     #[cfg(target_os = "emscripten")]
     pub use crate::os::emscripten::*;
+    #[cfg(target_os = "espidf")]
+    pub use crate::os::espidf::*;
     #[cfg(target_os = "freebsd")]
     pub use crate::os::freebsd::*;
     #[cfg(target_os = "fuchsia")]

library/std/src/os/unix/mod.rs

@@ -14,7 +14,8 @@ use crate::ptr;
     target_arch = "asmjs",
     target_arch = "wasm32",
     target_arch = "hexagon",
-    target_arch = "riscv32"
+    target_arch = "riscv32",
+    target_arch = "xtensa"
 )))]
 pub const MIN_ALIGN: usize = 8;
 #[cfg(all(any(

library/std/src/sys/common/alloc.rs

@@ -57,7 +57,8 @@ cfg_if::cfg_if! {
         target_os = "android",
         target_os = "illumos",
         target_os = "redox",
-        target_os = "solaris"
+        target_os = "solaris",
+        target_os = "espidf"
     ))] {
         #[inline]
         unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {

library/std/src/sys/unix/alloc.rs

@@ -250,3 +250,18 @@ mod imp {
         Args { iter: res.into_iter() }
     }
 }
+
+#[cfg(target_os = "espidf")]
+mod imp {
+    use super::Args;
+
+    #[inline(always)]
+    pub unsafe fn cleanup() {}
+
+    #[inline(always)]
+    pub unsafe fn init(_argc: isize, _argv: *const *const u8) {}
+
+    pub fn args() -> Args {
+        Args { iter: Vec::new().into_iter() }
+    }
+}

library/std/src/sys/unix/args.rs

@@ -34,12 +34,23 @@ impl Condvar {
     ))]
     pub unsafe fn init(&mut self) {}
 
+    // NOTE: ESP-IDF's PTHREAD_COND_INITIALIZER support is not released yet
+    // So on that platform, init() should always be called
+    // Moreover, that platform does not have pthread_condattr_setclock support,
+    // hence that initialization should be skipped as well
+    #[cfg(target_os = "espidf")]
+    pub unsafe fn init(&mut self) {
+        let r = libc::pthread_cond_init(self.inner.get(), crate::ptr::null());
+        assert_eq!(r, 0);
+    }
+
     #[cfg(not(any(
         target_os = "macos",
         target_os = "ios",
         target_os = "l4re",
         target_os = "android",
-        target_os = "redox"
+        target_os = "redox",
+        target_os = "espidf"
     )))]
     pub unsafe fn init(&mut self) {
         use crate::mem::MaybeUninit;
@@ -76,7 +87,12 @@ impl Condvar {
     // where we configure condition variable to use monotonic clock (instead of
     // default system clock). This approach avoids all problems that result
     // from changes made to the system time.
-    #[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "android")))]
+    #[cfg(not(any(
+        target_os = "macos",
+        target_os = "ios",
+        target_os = "android",
+        target_os = "espidf"
+    )))]
     pub unsafe fn wait_timeout(&self, mutex: &Mutex, dur: Duration) -> bool {
         use crate::mem;
 
@@ -103,7 +119,12 @@ impl Condvar {
     // This implementation is modeled after libcxx's condition_variable
     // https://github.com/llvm-mirror/libcxx/blob/release_35/src/condition_variable.cpp#L46
     // https://github.com/llvm-mirror/libcxx/blob/release_35/include/__mutex_base#L367
-    #[cfg(any(target_os = "macos", target_os = "ios", target_os = "android"))]
+    #[cfg(any(
+        target_os = "macos",
+        target_os = "ios",
+        target_os = "android",
+        target_os = "espidf"
+    ))]
     pub unsafe fn wait_timeout(&self, mutex: &Mutex, mut dur: Duration) -> bool {
         use crate::ptr;
         use crate::time::Instant;

library/std/src/sys/unix/condvar.rs

@@ -184,3 +184,14 @@ pub mod os {
     pub const EXE_SUFFIX: &str = "";
     pub const EXE_EXTENSION: &str = "";
 }
+
+#[cfg(target_os = "espidf")]
+pub mod os {
+    pub const FAMILY: &str = "unix";
+    pub const OS: &str = "espidf";
+    pub const DLL_PREFIX: &str = "lib";
+    pub const DLL_SUFFIX: &str = ".so";
+    pub const DLL_EXTENSION: &str = "so";
+    pub const EXE_SUFFIX: &str = "";
+    pub const EXE_EXTENSION: &str = "";
+}