ruby.git/coroutine, branch v4.0.2

coroutine/ppc64le: fix conditional registers got clobbered unexpectedly

2025-01-09T15:07:20+00:00

Now we also save the special cr registers during the fiber switching

Win32: Define COROUTINE_DECL to suppress a warning

2025-01-03T04:43:33+00:00

In cont.c:

```
warning C4141: 'noreturn': used more than once
```

Win32: Add coroutine for mswin on arm64

2024-12-17T11:25:06+00:00

Fix coroutine implementaion on Windows-Arm64

2024-12-17T00:46:27+00:00

When setjmp/longjmp/exceptions are used on Windows it's necessary to store+restore additional information from the TEB.
I didn't find any official documentation about the values to be saved, but found the corresponding boost/context implemenataion:
    https://github.com/boostorg/context/commit/abf8e04e23cf05a499594e674d1c90db39117662

This is similar to the special TIB handling on x86/x86_64 on Windows.

Without this fix an exception in a fiber segfaults without any output:
  ruby -e "Fiber.new{ raise 'test' }.resume"

Substitute `coroutine_transfer` with prefixed symbol in Makefile

2024-10-08T14:29:49+00:00

```
coroutine/arm64/Context.S:31:57: error: invoking macro TOKEN_PASTE argument 1: empty macro arguments are undefined in ISO C90 [-Wpedantic]
   31 | .global PREFIXED_SYMBOL(SYMBOL_PREFIX,coroutine_transfer)
      |                                                         ^
```

Cast via `uintptr_t` function pointer between object pointer

2024-10-08T14:29:49+00:00

- ISO C forbids conversion of function pointer to object pointer type
- ISO C forbids conversion of object pointer to function pointer type

Don't emit ELF notes on non-ELF platforms

2024-08-22T07:35:43+00:00

These apparently break compilation on old MacOS toolchains, because the
MachO section name is capped to 16 chars (although, on my MacOS, at
least, the section name just gets truncated). Nevertheless, these serve
no purpose on non-ELF platforms (they're part of the LSB Linux ABI).

[Bug #20677]

Fix typo in ELF note generation

2024-08-22T07:35:43+00:00

This wasn't looking at the right macro name for pac-ret support, so if
Ruby was compiled with pac-ret but NOT BTI, then the ELF note would not
be emitted.

Do not define SHSTK feature for amd64 Context.S

2024-07-07T10:14:44+00:00

We do not implement CET shadow-stack switching in amd64 Context.S. If
you compile Ruby with `-fcf-protection=full` and run it with
`GLIBC_TUNABLES=glibc.cpu.hwcaps=SHSTK` exported, it will crash with a
control flow exception.

Configure the appropriate notes at the end of Context.S

[Bug #18061]

Revert autoconf macros defining RUBY_AARCH64_{BTI|PAC}_ENABLED

2024-07-07T10:14:44+00:00

This partially reverts https://github.com/ruby/ruby/pull/10944; now that
we decided to pass CFLAGS to $(CC) when assembling .S files, we don't
need these autoconf macros that capture the state of
__ARM_FEATURE{PAC|BTI}_DEFAULT.

[Bug #20601]