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Add 'compiler/rustc_codegen_cranelift/' from commit '793d26047f'

git-subtree-dir: compiler/rustc_codegen_cranelift
git-subtree-mainline: cf798c1ec6
git-subtree-split: 793d26047f
This commit is contained in:
bjorn3 2020-10-26 09:53:27 +01:00
commit ac4f7deb2f
86 changed files with 16617 additions and 0 deletions

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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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@ -0,0 +1,26 @@
[package]
authors = ["bjorn3 <bjorn3@users.noreply.github.com>"]
name = "sysroot"
version = "0.0.0"
[dependencies]
core = { path = "./sysroot_src/library/core" }
compiler_builtins = "0.1"
alloc = { path = "./sysroot_src/library/alloc" }
std = { path = "./sysroot_src/library/std", features = ["panic_unwind", "backtrace"] }
test = { path = "./sysroot_src/library/test" }
alloc_system = { path = "./alloc_system" }
[patch.crates-io]
rustc-std-workspace-core = { path = "./sysroot_src/library/rustc-std-workspace-core" }
rustc-std-workspace-alloc = { path = "./sysroot_src/library/rustc-std-workspace-alloc" }
rustc-std-workspace-std = { path = "./sysroot_src/library/rustc-std-workspace-std" }
[profile.dev]
lto = "off"
[profile.release]
debug = true
incremental = true
lto = "off"

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@ -0,0 +1,13 @@
[package]
authors = ["The Rust Project Developers", "bjorn3 (edited to be usable outside the rust source)"]
name = "alloc_system"
version = "0.0.0"
[lib]
name = "alloc_system"
path = "lib.rs"
test = false
doc = false
[dependencies]
core = { path = "../sysroot_src/library/core" }
libc = { version = "0.2.43", features = ['rustc-dep-of-std'], default-features = false }
compiler_builtins = "0.1"

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@ -0,0 +1,342 @@
// Copyright 2015 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.
#![no_std]
#![allow(unused_attributes)]
#![unstable(feature = "alloc_system",
reason = "this library is unlikely to be stabilized in its current \
form or name",
issue = "32838")]
#![feature(allocator_api)]
#![feature(core_intrinsics)]
#![feature(nll)]
#![feature(staged_api)]
#![feature(rustc_attrs)]
#![feature(alloc_layout_extra)]
#![cfg_attr(
all(target_arch = "wasm32", not(target_os = "emscripten")),
feature(integer_atomics, stdsimd)
)]
#![cfg_attr(any(unix, target_os = "cloudabi", target_os = "redox"), feature(libc))]
// The minimum alignment guaranteed by the architecture. This value is used to
// add fast paths for low alignment values.
#[cfg(all(any(target_arch = "x86",
target_arch = "arm",
target_arch = "mips",
target_arch = "powerpc",
target_arch = "powerpc64",
target_arch = "asmjs",
target_arch = "wasm32")))]
#[allow(dead_code)]
const MIN_ALIGN: usize = 8;
#[cfg(all(any(target_arch = "x86_64",
target_arch = "aarch64",
target_arch = "mips64",
target_arch = "s390x",
target_arch = "sparc64")))]
#[allow(dead_code)]
const MIN_ALIGN: usize = 16;
/// The default memory allocator provided by the operating system.
///
/// This is based on `malloc` on Unix platforms and `HeapAlloc` on Windows,
/// plus related functions.
///
/// This type can be used in a `static` item
/// with the `#[global_allocator]` attribute
/// to force the global allocator to be the systems one.
/// (The default is jemalloc for executables, on some platforms.)
///
/// ```rust
/// use std::alloc::System;
///
/// #[global_allocator]
/// static A: System = System;
///
/// fn main() {
/// let a = Box::new(4); // Allocates from the system allocator.
/// println!("{}", a);
/// }
/// ```
///
/// It can also be used directly to allocate memory
/// independently of the standard librarys global allocator.
#[stable(feature = "alloc_system_type", since = "1.28.0")]
pub struct System;
#[cfg(any(windows, unix, target_os = "cloudabi", target_os = "redox"))]
mod realloc_fallback {
use core::alloc::{GlobalAlloc, Layout};
use core::cmp;
use core::ptr;
impl super::System {
pub(crate) unsafe fn realloc_fallback(&self, ptr: *mut u8, old_layout: Layout,
new_size: usize) -> *mut u8 {
// Docs for GlobalAlloc::realloc require this to be valid:
let new_layout = Layout::from_size_align_unchecked(new_size, old_layout.align());
let new_ptr = GlobalAlloc::alloc(self, new_layout);
if !new_ptr.is_null() {
let size = cmp::min(old_layout.size(), new_size);
ptr::copy_nonoverlapping(ptr, new_ptr, size);
GlobalAlloc::dealloc(self, ptr, old_layout);
}
new_ptr
}
}
}
#[cfg(any(unix, target_os = "cloudabi", target_os = "redox"))]
mod platform {
extern crate libc;
use core::ptr;
use MIN_ALIGN;
use System;
use core::alloc::{GlobalAlloc, Layout};
#[stable(feature = "alloc_system_type", since = "1.28.0")]
unsafe impl GlobalAlloc for System {
#[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
if layout.align() <= MIN_ALIGN && layout.align() <= layout.size() {
libc::malloc(layout.size()) as *mut u8
} else {
#[cfg(target_os = "macos")]
{
if layout.align() > (1 << 31) {
return ptr::null_mut()
}
}
aligned_malloc(&layout)
}
}
#[inline]
unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
if layout.align() <= MIN_ALIGN && layout.align() <= layout.size() {
libc::calloc(layout.size(), 1) as *mut u8
} else {
let ptr = self.alloc(layout.clone());
if !ptr.is_null() {
ptr::write_bytes(ptr, 0, layout.size());
}
ptr
}
}
#[inline]
unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
libc::free(ptr as *mut libc::c_void)
}
#[inline]
unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
if layout.align() <= MIN_ALIGN && layout.align() <= new_size {
libc::realloc(ptr as *mut libc::c_void, new_size) as *mut u8
} else {
self.realloc_fallback(ptr, layout, new_size)
}
}
}
#[cfg(any(target_os = "android",
target_os = "hermit",
target_os = "redox",
target_os = "solaris"))]
#[inline]
unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
// On android we currently target API level 9 which unfortunately
// doesn't have the `posix_memalign` API used below. Instead we use
// `memalign`, but this unfortunately has the property on some systems
// where the memory returned cannot be deallocated by `free`!
//
// Upon closer inspection, however, this appears to work just fine with
// Android, so for this platform we should be fine to call `memalign`
// (which is present in API level 9). Some helpful references could
// possibly be chromium using memalign [1], attempts at documenting that
// memalign + free is ok [2] [3], or the current source of chromium
// which still uses memalign on android [4].
//
// [1]: https://codereview.chromium.org/10796020/
// [2]: https://code.google.com/p/android/issues/detail?id=35391
// [3]: https://bugs.chromium.org/p/chromium/issues/detail?id=138579
// [4]: https://chromium.googlesource.com/chromium/src/base/+/master/
// /memory/aligned_memory.cc
libc::memalign(layout.align(), layout.size()) as *mut u8
}
#[cfg(not(any(target_os = "android",
target_os = "hermit",
target_os = "redox",
target_os = "solaris")))]
#[inline]
unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
let mut out = ptr::null_mut();
let ret = libc::posix_memalign(&mut out, layout.align(), layout.size());
if ret != 0 {
ptr::null_mut()
} else {
out as *mut u8
}
}
}
#[cfg(windows)]
#[allow(nonstandard_style)]
mod platform {
use MIN_ALIGN;
use System;
use core::alloc::{GlobalAlloc, Layout};
type LPVOID = *mut u8;
type HANDLE = LPVOID;
type SIZE_T = usize;
type DWORD = u32;
type BOOL = i32;
extern "system" {
fn GetProcessHeap() -> HANDLE;
fn HeapAlloc(hHeap: HANDLE, dwFlags: DWORD, dwBytes: SIZE_T) -> LPVOID;
fn HeapReAlloc(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID, dwBytes: SIZE_T) -> LPVOID;
fn HeapFree(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID) -> BOOL;
fn GetLastError() -> DWORD;
}
#[repr(C)]
struct Header(*mut u8);
const HEAP_ZERO_MEMORY: DWORD = 0x00000008;
unsafe fn get_header<'a>(ptr: *mut u8) -> &'a mut Header {
&mut *(ptr as *mut Header).offset(-1)
}
unsafe fn align_ptr(ptr: *mut u8, align: usize) -> *mut u8 {
let aligned = ptr.add(align - (ptr as usize & (align - 1)));
*get_header(aligned) = Header(ptr);
aligned
}
#[inline]
unsafe fn allocate_with_flags(layout: Layout, flags: DWORD) -> *mut u8 {
let ptr = if layout.align() <= MIN_ALIGN {
HeapAlloc(GetProcessHeap(), flags, layout.size())
} else {
let size = layout.size() + layout.align();
let ptr = HeapAlloc(GetProcessHeap(), flags, size);
if ptr.is_null() {
ptr
} else {
align_ptr(ptr, layout.align())
}
};
ptr as *mut u8
}
#[stable(feature = "alloc_system_type", since = "1.28.0")]
unsafe impl GlobalAlloc for System {
#[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
allocate_with_flags(layout, 0)
}
#[inline]
unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
allocate_with_flags(layout, HEAP_ZERO_MEMORY)
}
#[inline]
unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
if layout.align() <= MIN_ALIGN {
let err = HeapFree(GetProcessHeap(), 0, ptr as LPVOID);
debug_assert!(err != 0, "Failed to free heap memory: {}",
GetLastError());
} else {
let header = get_header(ptr);
let err = HeapFree(GetProcessHeap(), 0, header.0 as LPVOID);
debug_assert!(err != 0, "Failed to free heap memory: {}",
GetLastError());
}
}
#[inline]
unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
if layout.align() <= MIN_ALIGN {
HeapReAlloc(GetProcessHeap(), 0, ptr as LPVOID, new_size) as *mut u8
} else {
self.realloc_fallback(ptr, layout, new_size)
}
}
}
}
// This is an implementation of a global allocator on the wasm32 platform when
// emscripten is not in use. In that situation there's no actual runtime for us
// to lean on for allocation, so instead we provide our own!
//
// The wasm32 instruction set has two instructions for getting the current
// amount of memory and growing the amount of memory. These instructions are the
// foundation on which we're able to build an allocator, so we do so! Note that
// the instructions are also pretty "global" and this is the "global" allocator
// after all!
//
// The current allocator here is the `dlmalloc` crate which we've got included
// in the rust-lang/rust repository as a submodule. The crate is a port of
// dlmalloc.c from C to Rust and is basically just so we can have "pure Rust"
// for now which is currently technically required (can't link with C yet).
//
// The crate itself provides a global allocator which on wasm has no
// synchronization as there are no threads!
#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
mod platform {
extern crate dlmalloc;
use core::alloc::{GlobalAlloc, Layout};
use System;
static mut DLMALLOC: dlmalloc::Dlmalloc = dlmalloc::DLMALLOC_INIT;
#[stable(feature = "alloc_system_type", since = "1.28.0")]
unsafe impl GlobalAlloc for System {
#[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
let _lock = lock::lock();
DLMALLOC.malloc(layout.size(), layout.align())
}
#[inline]
unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
let _lock = lock::lock();
DLMALLOC.calloc(layout.size(), layout.align())
}
#[inline]
unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
let _lock = lock::lock();
DLMALLOC.free(ptr, layout.size(), layout.align())
}
#[inline]
unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
let _lock = lock::lock();
DLMALLOC.realloc(ptr, layout.size(), layout.align(), new_size)
}
}
#[cfg(target_feature = "atomics")]
mod lock {
use core::arch::wasm32;
use core::sync::atomic::{AtomicI32, Ordering::SeqCst};
static LOCKED: AtomicI32 = AtomicI32::new(0);
pub struct DropLock;
pub fn lock() -> DropLock {
loop {
if LOCKED.swap(1, SeqCst) == 0 {
return DropLock
}
unsafe {
let r = wasm32::atomic::wait_i32(
&LOCKED as *const AtomicI32 as *mut i32,
1, // expected value
-1, // timeout
);
debug_assert!(r == 0 || r == 1);
}
}
}
impl Drop for DropLock {
fn drop(&mut self) {
let r = LOCKED.swap(0, SeqCst);
debug_assert_eq!(r, 1);
unsafe {
wasm32::atomic::wake(
&LOCKED as *const AtomicI32 as *mut i32,
1, // only one thread
);
}
}
}
}
#[cfg(not(target_feature = "atomics"))]
mod lock {
#[inline]
pub fn lock() {} // no atomics, no threads, that's easy!
}
}

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@ -0,0 +1,36 @@
#!/bin/bash
# Requires the CHANNEL env var to be set to `debug` or `release.`
set -e
cd $(dirname "$0")
pushd ../ >/dev/null
source ./scripts/config.sh
popd >/dev/null
# Cleanup for previous run
# v Clean target dir except for build scripts and incremental cache
rm -r target/*/{debug,release}/{build,deps,examples,libsysroot*,native} 2>/dev/null || true
rm -r sysroot/ 2>/dev/null || true
# Use rustc with cg_clif as hotpluggable backend instead of the custom cg_clif driver so that
# build scripts are still compiled using cg_llvm.
export RUSTC=$(pwd)/../"target/"$CHANNEL"/cg_clif_build_sysroot"
export RUSTFLAGS=$RUSTFLAGS" --clif"
# Build libs
export RUSTFLAGS="$RUSTFLAGS -Zforce-unstable-if-unmarked -Cpanic=abort"
if [[ "$1" == "--release" ]]; then
sysroot_channel='release'
# FIXME Enable incremental again once rust-lang/rust#74946 is fixed
# FIXME Enable -Zmir-opt-level=2 again once it doesn't ice anymore
CARGO_INCREMENTAL=0 RUSTFLAGS="$RUSTFLAGS" cargo build --target $TARGET_TRIPLE --release
else
sysroot_channel='debug'
cargo build --target $TARGET_TRIPLE
fi
# Copy files to sysroot
mkdir -p sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
cp -r target/$TARGET_TRIPLE/$sysroot_channel/deps/* sysroot/lib/rustlib/$TARGET_TRIPLE/lib/

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#!/bin/bash
set -e
cd $(dirname "$0")
SRC_DIR=$(dirname $(rustup which rustc))"/../lib/rustlib/src/rust/"
DST_DIR="sysroot_src"
if [ ! -e $SRC_DIR ]; then
echo "Please install rust-src component"
exit 1
fi
rm -rf $DST_DIR
mkdir -p $DST_DIR/library
cp -r $SRC_DIR/library $DST_DIR/
pushd $DST_DIR
echo "[GIT] init"
git init
echo "[GIT] add"
git add .
echo "[GIT] commit"
git commit -m "Initial commit" -q
for file in $(ls ../../patches/ | grep -v patcha); do
echo "[GIT] apply" $file
git apply ../../patches/$file
git add -A
git commit --no-gpg-sign -m "Patch $file"
done
popd
echo "Successfully prepared libcore for building"

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#![no_std]