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Handle RwLock reader count overflow
`pthread_rwlock_rdlock` may return `EAGAIN` if the maximum reader count overflows. We shouldn't return a successful lock in that case.
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Function errno_location() is not used on DragonFly. As warnings are
errors, this breaks the build.
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Comment on the casts in the `seek` implementations on files
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Because of changes to how Rust acquires randomness HashMap is not
guaranteed to be DoS resistant. This commit reflects these changes in
the docs themselves and provides an alternative method to creating
a hash that is resistant if needed.
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Doc `std::thread::park_timeout`
r? @steveklabnik
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Add doc example for `std::ffi::NulError::nul_position`.
None
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A couple `std::net` doc improvements.
None
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Add io::Error doc examples
Fixes #29359.
r? @steveklabnik
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Add doc examples for FileType struct
Part of #29356.
r? @steveklabnik
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Escape the unmatched surrogates with lower-case hexadecimal numbers
It's done the same way for the rest of the codepoint escapes.
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Configure condition variables to use monotonic time using
pthread_condattr_setclock on systems where this is possible.
This fixes the issue when thread waiting on condition variable is
woken up too late when system time is moved backwards.
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The targets are:
- `arm-unknown-linux-musleabi`
- `arm-unknown-linux-musleabihf`
- `armv7-unknown-linux-musleabihf`
These mirror the existing `gnueabi` targets.
All of these targets produce fully static binaries, similar to the
x86 MUSL targets.
For now these targets can only be used with `--rustbuild` builds, as
https://github.com/rust-lang/compiler-rt/pull/22 only made the
necessary compiler-rt changes in the CMake configs, not the plain
GNU Make configs.
I've tested these targets GCC 5.3.0 compiled again musl-1.1.12
(downloaded from http://musl.codu.org/). An example `./configure`
invocation is:
```
./configure \
--enable-rustbuild
--target=arm-unknown-linux-musleabi \
--musl-root="$MUSL_ROOT"
```
where `MUSL_ROOT` points to the `arm-linux-musleabi` prefix.
Usually that path will be of the form
`/foobar/arm-linux-musleabi/arm-linux-musleabi`.
Usually the cross-compile toolchain will live under
`/foobar/arm-linux-musleabi/bin`. That path should either by added
to your `PATH` variable, or you should add a section to your
`config.toml` as follows:
```
[target.arm-unknown-linux-musleabi]
cc = "/foobar/arm-linux-musleabi/bin/arm-linux-musleabi-gcc"
cxx = "/foobar/arm-linux-musleabi/bin/arm-linux-musleabi-g++"
```
As a prerequisite you'll also have to put a cross-compiled static
`libunwind.a` library in `$MUSL_ROOT/lib`. This is similar to [how
the x86_64 MUSL targets are built]
(https://doc.rust-lang.org/book/advanced-linking.html).
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This is to pull in changes to support ARM MUSL targets.
This change also commits a couple of other cargo-generated changes
to other dependencies in the various Cargo.toml files.
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rustbuild: make backtraces (RUST_BACKTRACE) optional
but keep them enabled by default to maintain the status quo.
When disabled shaves ~56KB off every x86_64-unknown-linux-gnu
binary.
To disable backtraces you have to use a config.toml (see
src/bootstrap/config.toml.example for details) when building rustc/std:
$ python bootstrap.py --config=config.toml
---
r? @alexcrichton
cc rust-lang/rfcs#1417
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Fs docs
Fixes #29356.
r? @steveklabnik
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It's done the same way for the rest of the codepoint escapes.
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Escape fewer Unicode codepoints in `Debug` impl of `str`
Use the same procedure as Python to determine whether a character is
printable, described in [PEP 3138]. In particular, this means that the
following character classes are escaped:
- Cc (Other, Control)
- Cf (Other, Format)
- Cs (Other, Surrogate), even though they can't appear in Rust strings
- Co (Other, Private Use)
- Cn (Other, Not Assigned)
- Zl (Separator, Line)
- Zp (Separator, Paragraph)
- Zs (Separator, Space), except for the ASCII space `' '` `0x20`
This allows for user-friendly inspection of strings that are not
English (e.g. compare `"\u{e9}\u{e8}\u{ea}"` to `"éèê"`).
Fixes #34318.
CC #34422.
[PEP 3138]: https://www.python.org/dev/peps/pep-3138/
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std: Fix usage of SOCK_CLOEXEC
This code path was intended to only get executed on Linux, but unfortunately the
`cfg!` was malformed so it actually never got executed.
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DoubleEndedIterator for Args
This PR implements the DoubleEndedIterator trait for the `std::env::Args[Os]` structure, as well
as the internal implementations.
It is primarily motivated by me, as I happened to implement a simple `reversor` program many times
now, which so far had to use code like this:
```Rust
for arg in std::env::args().skip(1).collect::<Vec<_>>().iter().rev() {}
```
... even though I would have loved to do this instead:
```Rust
for arg in std::env::args().skip(1).rev() {}
```
The latter is more natural, and I did not find a reason for not implementing it.
After all, on every system, the number of arguments passed to the program are known
at runtime.
To my mind, it follows KISS, and does not try to be smart at all. Also, there are no unit-tests,
primarily as I did not find any existing tests for the `Args` struct either.
The windows implementation is basically a copy-pasted variant of the `next()` method implementation,
and I could imagine sharing most of the code instead. Actually I would be happy if the reviewer would
ask for it.
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Improve Open doc
Part of #29356.
r? @steveklabnik
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Dir entry doc
Part of #29356.
r? @steveklabnik
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Fix HashMap's values_mut example to use println!
Fix HashMap's values_mut example to use println!
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Add DirBuilder doc examples
r? @steveklabnik
Part of #29329 and of #29356.
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Add HashMap Entry enums examples
Part of #29348.
r? @steveklabnik
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but keep them enabled by default to maintain the status quo.
When disabled shaves ~56KB off every x86_64-unknown-linux-gnu
binary.
To disable backtraces you have to use a config.toml (see
src/bootstrap/config.toml.example for details) when building rustc/std:
$ python bootstrap.py --config=config.toml
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The number of arguments given to a process is always known, which
makes implementing DoubleEndedIterator possible.
That way, the Iterator::rev() method becomes usable, among others.
Signed-off-by: Sebastian Thiel <byronimo@gmail.com>
Tidy for DoubleEndedIterator
I chose to not create a new feature for it, even though
technically, this makes me lie about the original availability
of the implementation.
Verify with @alexchrichton
Setup feature flag for new std::env::Args iterators
Add test for Args reverse iterator
It's somewhat depending on the input of the test program,
but made in such a way that should be somewhat flexible to changes
to the way it is called.
Deduplicate windows ArgsOS code for DEI
DEI = DoubleEndedIterator
Move env::args().rev() test to run-pass
It must be controlling it's arguments for full isolation.
Remove superfluous feature name
Assert all arguments returned by env::args().rev()
Let's be very sure it works as we expect, why take chances.
Fix rval of os_string_from_ptr
A trait cannot be returned, but only the corresponding object.
Deref pointers to actually operate on the argument
Put unsafe to correct location
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