Enable nvptx64-nvidia-cuda target

.gitmodules

@@ -10,7 +10,7 @@
 	url = https://github.com/rust-lang/rust-installer.git
 [submodule "src/liblibc"]
 	path = src/liblibc
-	url = https://github.com/rust-lang/libc.git
+	url = https://github.com/termoshtt/libc.git
 [submodule "src/doc/nomicon"]
 	path = src/doc/nomicon
 	url = https://github.com/rust-lang-nursery/nomicon.git

src/liballoc_system/lib.rs

@@ -18,7 +18,7 @@
 #![feature(core_intrinsics)]
 #![feature(staged_api)]
 #![feature(rustc_attrs)]
-#![cfg_attr(any(unix, target_os = "cloudabi", target_os = "redox"), feature(libc))]
+#![cfg_attr(any(unix, target_os = "cuda", target_os = "cloudabi", target_os = "redox"), feature(libc))]
 #![rustc_alloc_kind = "lib"]
 
 // The minimum alignment guaranteed by the architecture. This value is used to
@@ -35,6 +35,7 @@ const MIN_ALIGN: usize = 8;
 #[cfg(all(any(target_arch = "x86_64",
               target_arch = "aarch64",
               target_arch = "mips64",
+              target_arch = "nvptx64",
               target_arch = "s390x",
               target_arch = "sparc64")))]
 #[allow(dead_code)]
@@ -349,3 +350,25 @@ mod platform {
         }
     }
 }
+
+#[cfg(target_os = "cuda")]
+mod platform {
+    extern crate libc;
+
+    use core::alloc::{GlobalAlloc, Layout};
+    use System;
+
+    #[stable(feature = "alloc_system_type", since = "1.28.0")]
+    unsafe impl GlobalAlloc for System {
+        #[inline]
+        unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
+            libc::malloc(layout.size()) as _
+        }
+
+        #[inline]
+        unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
+            libc::free(ptr as *mut libc::c_void);
+        }
+    }
+
+}

src/libpanic_abort/lib.rs

@@ -63,6 +63,7 @@ pub unsafe extern fn __rust_start_panic(_payload: usize) -> u32 {
 
     #[cfg(any(target_os = "redox",
               windows,
+              target_os = "cuda",
               all(target_arch = "wasm32", not(target_os = "emscripten"))))]
     unsafe fn abort() -> ! {
         core::intrinsics::abort();

src/libpanic_unwind/cuda.rs

@@ -0,0 +1,25 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use alloc::boxed::Box;
+use core::any::Any;
+use core::intrinsics;
+
+pub fn payload() -> *mut u8 {
+    0 as *mut u8
+}
+
+pub unsafe fn cleanup(_ptr: *mut u8) -> Box<Any + Send> {
+    intrinsics::abort()
+}
+
+pub unsafe fn panic(_data: Box<Any + Send>) -> u32 {
+    intrinsics::abort()
+}

src/libpanic_unwind/lib.rs

@@ -86,6 +86,10 @@ mod imp;
 #[path = "wasm32.rs"]
 mod imp;
 
+#[cfg(target_os = "cuda")]
+#[path = "cuda.rs"]
+mod imp;
+
 mod dwarf;
 mod windows;
 

src/librustc_target/spec/mod.rs

@@ -361,6 +361,8 @@ supported_targets! {
     ("wasm32-unknown-unknown", wasm32_unknown_unknown),
     ("wasm32-experimental-emscripten", wasm32_experimental_emscripten),
 
+    ("nvptx64-nvidia-cuda", nvptx64_nvidia_cuda),
+
     ("thumbv6m-none-eabi", thumbv6m_none_eabi),
     ("thumbv7m-none-eabi", thumbv7m_none_eabi),
     ("thumbv7em-none-eabi", thumbv7em_none_eabi),

src/librustc_target/spec/nvptx64_nvidia_cuda.rs

@@ -0,0 +1,34 @@
+/// Copied from wasm32-unknown-unknown
+
+use super::{LinkerFlavor, Target, TargetOptions, PanicStrategy};
+
+pub fn target() -> Result<Target, String> {
+    let opts = TargetOptions {
+        cpu: "sm_50".to_string(),
+        linker: None,
+        dynamic_linking: true,
+        only_cdylib: true,
+        executables: false,
+        exe_suffix: ".ptx".to_string(),
+        dll_prefix: "".to_string(),
+        dll_suffix: ".ptx".to_string(),
+        singlethread: true,
+        obj_is_bitcode: true,
+        panic_strategy: PanicStrategy::Abort,
+        .. Default::default()
+    };
+    Ok(Target {
+        llvm_target: "nvptx64-nvidia-cuda".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_c_int_width: "32".to_string(),
+        target_env: "".to_string(),
+        target_os: "cuda".to_string(),
+        target_vendor: "nvidia".to_string(),
+        data_layout: "e-i64:64-i128:128-v16:16-v32:32-n16:32:64".to_string(),
+        arch: "nvptx64".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: opts,
+    })
+}
+

src/libstd/env.rs

@@ -973,6 +973,11 @@ mod arch {
     pub const ARCH: &'static str = "wasm32";
 }
 
+#[cfg(target_arch = "nvptx64")]
+mod arch {
+    pub const ARCH: &'static str = "nvptx64";
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src/libstd/os/linux/raw.rs

@@ -36,6 +36,7 @@ pub use self::arch::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
           target_arch = "powerpc",
           target_arch = "arm",
           target_arch = "asmjs",
+          target_arch = "nvptx64",
           target_arch = "wasm32"))]
 mod arch {
     use os::raw::{c_long, c_short, c_uint};

src/libstd/sys/mod.rs

@@ -48,6 +48,9 @@ cfg_if! {
     } else if #[cfg(target_arch = "wasm32")] {
         mod wasm;
         pub use self::wasm::*;
+    } else if #[cfg(target_os = "cuda")] {
+        mod wasm;  // FIXME Use same one
+        pub use self::wasm::*;
     } else {
         compile_error!("libstd doesn't compile for this platform yet");
     }
@@ -62,7 +65,7 @@ cfg_if! {
     if #[cfg(any(unix, target_os = "redox"))] {
         // On unix we'll document what's already available
         pub use self::ext as unix_ext;
-    } else if #[cfg(any(target_os = "cloudabi", target_arch = "wasm32"))] {
+    } else if #[cfg(any(target_os = "cloudabi", target_os = "cuda", target_arch = "wasm32"))] {
         // On CloudABI and wasm right now the module below doesn't compile
         // (missing things in `libc` which is empty) so just omit everything
         // with an empty module
@@ -81,7 +84,7 @@ cfg_if! {
     if #[cfg(windows)] {
         // On windows we'll just be documenting what's already available
         pub use self::ext as windows_ext;
-    } else if #[cfg(any(target_os = "cloudabi", target_arch = "wasm32"))] {
+    } else if #[cfg(any(target_os = "cloudabi", target_os = "cuda", target_arch = "wasm32"))] {
         // On CloudABI and wasm right now the shim below doesn't compile, so
         // just omit it
         #[unstable(issue = "0", feature = "std_internals")]

src/libstd/sys_common/mod.rs

@@ -56,7 +56,7 @@ pub mod bytestring;
 pub mod process;
 
 cfg_if! {
-    if #[cfg(any(target_os = "cloudabi", target_os = "l4re", target_os = "redox"))] {
+    if #[cfg(any(target_os = "cloudabi", target_os = "l4re", target_os = "redox", target_os = "cuda"))] {
         pub use sys::net;
     } else if #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))] {
         pub use sys::net;

src/libtest/lib.rs

@@ -979,7 +979,7 @@ fn use_color(opts: &TestOpts) -> bool {
     }
 }
 
-#[cfg(any(target_os = "cloudabi", target_os = "redox",
+#[cfg(any(target_os = "cloudabi", target_os = "redox", target_os = "cuda",
           all(target_arch = "wasm32", not(target_os = "emscripten"))))]
 fn stdout_isatty() -> bool {
     // FIXME: Implement isatty on Redox
@@ -1207,6 +1207,12 @@ fn get_concurrency() -> usize {
         1
     }
 
+    #[cfg(target_os = "cuda")]
+    fn num_cpus() -> usize {
+        // FIXME: Should return number of CUDA cores?
+        1
+    }
+
     #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
     fn num_cpus() -> usize {
         1

src/libunwind/libunwind.rs

@@ -71,6 +71,9 @@ pub const unwinder_private_data_size: usize = 2;
 #[cfg(target_os = "emscripten")]
 pub const unwinder_private_data_size: usize = 20;
 
+#[cfg(target_os = "cuda")]
+pub const unwinder_private_data_size: usize = 0;
+
 #[repr(C)]
 pub struct _Unwind_Exception {
     pub exception_class: _Unwind_Exception_Class,