Manish Goregaokar eb860987cf Rollup merge of #88828 - FabianWolff:issue-88585, r=dtolnay ...

Use `libc::sigaction()` instead of `sys::signal()` to prevent a deadlock

Fixes #88585. POSIX [specifies](https://man7.org/linux/man-pages/man3/fork.3p.html) that after forking,
> to avoid errors, the child process may only execute async-signal-safe operations until such time as one of the exec functions is called.

Rust's standard library does not currently adhere to this, as evidenced by #88585. The child process calls [`sys::signal()`](7bf0736e13/library/std/src/sys/unix/android.rs (L76)), which on Android calls [`libc::dlsym()`](7bf0736e13/library/std/src/sys/unix/weak.rs (L101)), which is [**not**](https://man7.org/linux/man-pages/man7/signal-safety.7.html) async-signal-safe, and in fact causes a deadlock in the example in #88585.

I think the easiest solution here would be to just call `libc::sigaction()` instead, which [is](https://man7.org/linux/man-pages/man7/signal-safety.7.html) async-signal-safe, provides the functionality we need, and is apparently available on all Android versions because it is also used e.g. [here](7bf0736e13/library/std/src/sys/unix/stack_overflow.rs (L112-L114)).

2021-10-05 12:52:42 -07:00

..

fd

I/O safety.

2021-08-19 12:02:39 -07:00

kernel_copy

add test for failing io::copy specialization

2021-02-22 21:41:32 +01:00

os

Disable glibc tests on vxworks

2021-07-21 10:53:43 -07:00

os_str

Move os_str_bytes to sys::unix and reuse it on other platforms.

2021-07-03 03:01:36 +02:00

process

Rollup merge of #88828 - FabianWolff:issue-88585, r=dtolnay

2021-10-05 12:52:42 -07:00

alloc.rs

STD support for the ESP-IDF framework

2021-08-10 12:09:00 +03:00

android.rs

Change weak! and linkat! to macros 2.0

2021-07-10 12:55:09 -07:00

args.rs

STD support for the ESP-IDF framework

2021-08-10 12:09:00 +03:00

cmath.rs

Reuse unix::cmath

2021-04-28 14:25:04 +02:00

condvar.rs

STD support for the ESP-IDF framework

2021-08-10 12:09:00 +03:00

env.rs

STD support for the ESP-IDF framework

2021-08-10 12:09:00 +03:00

fd.rs

I/O safety.

2021-08-19 12:02:39 -07:00

fs.rs

Add chown functions to std::os::unix::fs to change the owner and group of files

2021-09-14 19:10:05 -07:00

futex.rs

Fix timeout conversion

2020-11-12 03:40:15 +00:00

io.rs

…

kernel_copy.rs

Change weak! and linkat! to macros 2.0

2021-07-10 12:55:09 -07:00

l4re.rs

add TcpStream::set_linger and TcpStream::linger

2021-08-30 13:42:52 -04:00

memchr.rs

…

mod.rs

Replace a couple of asserts with rtassert! in rt code

2021-09-16 15:20:44 +02:00

mutex.rs

Check that pthread mutex initialization succeeded

2020-10-20 00:00:00 +00:00

net.rs

clean up c::linger conversion

2021-08-30 14:00:21 -04:00

os_str.rs

Move os_str_bytes to sys::unix and reuse it on other platforms.

2021-07-03 03:01:36 +02:00

os.rs

Rollup merge of #87631 - :solarish_upd_fs, r=joshtriplett

2021-10-04 23:56:15 -07:00

path.rs

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pipe.rs

I/O safety.

2021-08-19 12:02:39 -07:00

rand.rs

STD support for the ESP-IDF framework

2021-08-10 12:09:00 +03:00

rwlock.rs

Multiple improvements to RwLocks

2021-06-01 09:07:55 +02:00

stack_overflow.rs

Handle stack_t.ss_sp type change for DragonFlyBSD

2021-08-27 17:31:42 -05:00

stdio.rs

I/O safety.

2021-08-19 12:02:39 -07:00

thread_local_dtor.rs

Move sys::vxworks code to sys::unix

2021-04-19 13:29:22 +02:00

thread_local_key.rs

…

thread.rs

haiku thread affinity build fix

2021-10-02 13:24:30 +01:00

time.rs

STD support for the ESP-IDF framework

2021-08-10 12:09:00 +03:00

weak.rs

bump bootstrap compiler to 1.55

2021-08-01 11:19:24 -04:00