| Age | Commit message (Collapse) | Author | Lines |
|---|
|
|
|
This was added and stabilized in commit 02503029b83a, but while that
claimed to be for 1.28.0, it didn't actually make it until 1.29.0.
|
|
|
|
|
|
|
|
Add rustc SHA to released DWARF debuginfo
This commit updates the debuginfo that is encoded in all of our released
artifacts by default. Currently it has paths like `/checkout/src/...` but these
are a little inconsistent and have changed over time. This commit instead
attempts to actually define the file paths in our debuginfo to be consistent
between releases.
All debuginfo paths are now intended to be `/rustc/$sha` where `$sha` is the git
sha of the released compiler. Sub-paths are all paths into the git repo at that
`$sha`.
|
|
Replace unwrap calls in example by expect
Part of #51668.
r? @steveklabnik
|
|
Add target thumbv7a-pc-windows-msvc
This is an early draft of support for Windows/ARM. To test it,
1. Install Visual Studio 2017 and Windows SDK version 17134.
1. Obtain alexcrichton/xz2-rs#35, rust-lang-nursery/compiler-builtins#256, and the fix for [LLVM Bug 38620](https://bugs.llvm.org/show_bug.cgi?id=38620).
2. Open a command prompt and run
```
set CC_thumbv7a-pc-windows-msvc=C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.11.25503\bin\HostX64\arm\CL.exe
set CFLAGS_thumbv7a-pc-windows-msvc=/D_ARM_WINAPI_PARTITION_DESKTOP_SDK_AVAILABLE=1 /nologo
c:\python27\python.exe x.py build --host x86_64-pc-windows-msvc --build x86_64-pc-windows-msvc --target thumbv7a-pc-windows-msvc
```
It will build the stage 2 compiler, but fail building stage 2 test. To build an executable targeting windows/arm,
1. Copy `build\x86_64-pc-windows-msvc\stage0\bin\cargo.exe` to `build\x86_64-pc-windows-msvc\stage2\bin`
2. Open a command prompt and run
```
"C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
set PATH=build\x86_64-pc-windows-msvc\stage2\bin;%PATH%
cargo new hello
cd hello
cargo build --target thumbv7a-pc-windows-msvc –release
```
Copy target\thumbv7a-pc-windows-msvc\release\hello.exe to your platform and run.
There are a number of open issues that I'm hoping to get help with:
- Error when compiling the `test` crate: `error: cannot link together two panic runtimes: panic_abort and panic_unwind`
- Warnings when building the compiler_builtins crate: `warning: cl : Command line warning D9002 : ignoring unknown option '-fvisibility=hidden'`. It looks like the build system is passing GCC-style flags to MSVC.
- How to specify the LIBPATH entries for ARM. Right now they are hardcoded as absolute paths in the target spec.
This pull request depends on
- alexcrichton/xz2-rs#35 - update vcxproj to Visual Studio 2017
- rust-lang-nursery/compiler-builtins#256 - fix compile errors when building for windows/arm
- [Bug 38620 - ARM: Incorrect COFF relocation type for thumb bl instruction](https://bugs.llvm.org/show_bug.cgi?id=38620)
This PR updates #52659
|
|
|
|
Previously the code below would not be guaranteed to exit when the first
spawned thread took the `return, // already unparked` path because there
was no write to synchronize with a read in `park`.
```
use std::sync::atomic::{AtomicBool, Ordering};
use std::thread::{current, spawn, park};
static FLAG: AtomicBool = AtomicBool::new(false);
fn main() {
let thread_0 = current();
spawn(move || {
FLAG.store(true, Ordering::Relaxed);
thread_0.unpark();
});
let thread_0 = current();
spawn(move || {
thread_0.unpark();
});
while !FLAG.load(Ordering::Relaxed) {
park();
}
}
```
|
|
|
|
stabilize outlives requirements
https://github.com/rust-lang/rust/issues/44493
r? @nikomatsakis
|
|
Fix typos in libstd hash map
modified growth algo description to read "the first table overflows into the second, and the second into the first." plus smaller typos
|
|
`&CStr`, not `CStr`, is the counterpart of `&str`
|
|
Update documentation for fill_buf in std::io::BufRead
Brings the documentation in line with the BufReader implementation.
Fixes #48022.
This is my first PR, and I think the `E-easy` label is very cool, as so is the practice of describing the fix but leaving it for someone else; it really makes it a lot less intimidating to get started with something!
|
|
Co-authored-by: nikomatsakis
|
|
|
|
This commit updates the debuginfo that is encoded in all of our released
artifacts by default. Currently it has paths like `/checkout/src/...` but these
are a little inconsistent and have changed over time. This commit instead
attempts to actually define the file paths in our debuginfo to be consistent
between releases.
All debuginfo paths are now intended to be `/rustc/$sha` where `$sha` is the git
sha of the released compiler. Sub-paths are all paths into the git repo at that
`$sha`.
|
|
modified to read "the first table overflows into the second, and the second into the first." plus smaller typos
|
|
|
|
closes #40289
|
|
|
|
|
|
Rollup of 10 pull requests
Successful merges:
- #53315 (use `NonZeroU32` in `newtype_index!`macro, change syntax)
- #53932 ([NLL] Remove base_place)
- #53942 (Rewrite `precompute_borrows_out_of_scope` for fewer hash table lookups.)
- #53973 (Have rust-lldb look for the rust-enabled lldb)
- #53981 (Implement initializer() for FileDesc)
- #53987 (rustbuild: allow configuring llvm version suffix)
- #53993 (rustc_resolve: don't record uniform_paths canaries as reexports.)
- #54007 (crates that provide a `panic_handler` are exempt from the `unused_extern_crates` lint)
- #54040 (update books for next release)
- #54050 (Update `petgraph` dependency to 0.4.13 to fix build with nightly)
|
|
Implement initializer() for FileDesc
Here was my initial issue:
```rust
use std::process::{Command};
fn main() {
let output = Command::new("curl").arg("-s").arg("http://ovh.net/files/100Mio.dat").output();
println!("{:?}", output.unwrap().stdout.len());
}
```
```
~/stuff ❯❯❯ time ./dwl
104857600
./dwl 16.22s user 1.80s system 23% cpu 1:15.24 total
```
```rust
use std::process::{Command, Stdio};
fn main() {
let child = Command::new("curl").arg("-s").arg("http://ovh.net/files/100Mio.dat").stdout(Stdio::piped()).spawn();
let output = child.unwrap().wait_with_output().unwrap();
println!("{:?}", output.stdout.len());
}
```
```
~/stuff ❯❯❯ time ./dwl2
104857600
./dwl2 0.64s user 2.18s system 5% cpu 53.072 total
```
As you can see the first version is spending much more time in userland and also uses more cpu. With the help of @programble, @talchas and @habnabit on the rust IRC, we discovered that the slow version uses two pipes, one for `stdin` and one for `stderr` and in that case it polls when going through [this function](https://github.com/rust-lang/rust/blob/master/src/libstd/sys/unix/pipe.rs#L82). The polling calls `read_to_end` on the pipes repetitively and this results in zeroing its internal buffer each time. To avoid this zeroing, `FileDesc` needs to implement `initializer`. We see no reason why it [wouldn't work with uninitialized memory](https://doc.rust-lang.org/1.26.1/src/std/io/mod.rs.html#534) so this PR fixes that.
Here is some tracing of the slow program:
versus the fast program:
I have not tested the change yet but will try to build it tomorrow.
|
|
stabilize #[panic_handler]
closes #44489
### Update(2018-09-07)
This was proposed for stabilization in https://github.com/rust-lang/rust/issues/44489#issuecomment-398965881 and its FCP with disposition to merge / accept is nearly over. The summary of what's being stabilized can be found in https://github.com/rust-lang/rust/issues/44489#issuecomment-416645946
Documentation PRs:
- Reference. https://github.com/rust-lang-nursery/reference/pull/362
- Nomicon. https://github.com/rust-lang-nursery/nomicon/pull/75
---
`#[panic_implementation]` was implemented recently in #50338. `#[panic_implementation]` is basically the old `panic_fmt` language item but in a less error prone (\*) shape. There are still some issues and questions to sort out around this feature (cf. #44489) but this PR is meant to start a discussion about those issues / questions with the language team.
(\*) `panic_fmt` was not type checked; changes in its function signature caused serious, silent binary size regressions like the one observed in #43054
Some unresolved questions from #44489:
> Should the Display of PanicInfo format the panic information as "panicked at 'reason',
> src/main.rs:27:4", as "'reason', src/main.rs:27:4", or simply as "reason".
The current implementation formats `PanicInfo` as the first alternative, which is how panic messages are formatted by the `std` panic handler. The `Display` implementation is more than a convenience: `PanicInfo.message` is unstable so it's not possible to replicate the `Display` implementation on stable.
> Is this design compatible, or can it be extended to work, with unwinding implementations for
> no-std environments?
I believe @whitequark made more progress with unwinding in no-std since their last comment in #44489. Perhaps they can give us an update?
---
Another unresolved question is where this feature should be documented. The feature currently doesn't have any documentation.
cc @rust-lang/lang
cc @jackpot51 @alevy @phil-opp
|
|
r=Mark-Simulacrum,QuietMisdreavus
Trait impl show docs
Fixes #51834.
<img width="1440" alt="screen shot 2018-06-29 at 00 14 33" src="https://user-images.githubusercontent.com/3050060/42063323-6e6e8cc8-7b31-11e8-88ef-4dd2229df76c.png">
(You can see both commit changes in the screenshot 😄)
r? @QuietMisdreavus
|
|
Brings the documentation in line with the BufReader implementation.
Fixes #48022.
|
|
|
|
|
|
|
|
Cross reference io::copy and fs::copy in docs.
Fixes https://github.com/rust-lang/rust/issues/52524.
|
|
|
|
|
|
|
|
in order to avoid constantly zeroing memory when it's not needed.
|
|
|
|
I think it might be used in some other things, but I'm not fluent enough
at sifting through the rust compiler's source code to find every use of
a specific keyword.
This leaves the question of how to document the `extern` keyword, what
with how much overlap it has with `crate`, but that's used with ABI
stuff so that should be fine.
|
|
|
|
|
|
|
|
|
|
|
|
Update Cargo.lock
This also includes major version bumps for the rand crate used by core, std, and alloc tests, among other crates (regex, etc.) used elsewhere. Since these are all internal there should be no user-visible changes.
r? @alexcrichton
|
|
Allow to check if sync::Once is already initialized
Hi!
I propose to expose a way to check if a `Once` instance is initialized.
I need it in `once_cell`. `OnceCell` is effetively a pair of `(Once, UnsafeCell<Option<T>>)`, which can set the `T` only once. Because I can't check if `Once` is initialized, I am forced to add an indirection and check the value of ptr instead:
https://github.com/matklad/once_cell/blob/8127a81976c3f2f4c0860562c3f14647ebc025c0/src/lib.rs#L423-L429
https://github.com/matklad/once_cell/blob/8127a81976c3f2f4c0860562c3f14647ebc025c0/src/lib.rs#L457-L461
The `parking_lot`'s version of `Once` exposes the state as an enum: https://docs.rs/parking_lot/0.6.3/parking_lot/struct.Once.html#method.state.
I suggest, for now, just to add a simple `bool` function: this fits my use-case perfectly, exposes less implementation details, and is forward-compatible with more fine-grained state checking.
|
|
|
|
|
|
Mostly addressing notes on ambiguous syntax and spurious newlines.
|
|
Turns out writing docs on keywords that are used in multiple different
places in entirely different contexts gets a little harder. I put a
footnote on `*const` syntax just to make sure you can find it if need
be, but it might need more detail.
|
|
It's pretty basic and could do with more details, but it's a good
starter until someone else improves it.
|
