The VPATH rule of NMake is different from others. Abandon using
them in the rules for the generated source, locate them in the top
source directory, as well as the generated library files of prism.
NMake combines VPATH and stem with a backslash. The resulting source
name is embedded verbatim, backslash included, into the generated file
using the `#line` pragma (e.g., "src\gc.rb"). This causes the warning
"C4129: Unrecognized character escape sequence".
* Add support for `cause:` argument to `Fiber#raise` and `Thread#raise`.
The implementation behaviour is consistent with `Kernel#raise` and
`Exception#initialize` methods, allowing the `cause:` argument to be
passed to `Fiber#raise` and `Thread#raise`. This change ensures that
the `cause:` argument is handled correctly, providing a more consistent
and expected behavior when raising exceptions in fibers and threads.
[Feature #21360]
* Shared specs for Fiber/Thread/Kernel raise.
---------
Co-authored-by: Samuel Williams <samuel.williams@shopify.com>
Ex: `str.encode` and `str.encode!` work across ractors now.
The global table `transcoder_table` needs a lock around each st_lookup/st_insert, and it's a two-level
table so the second level also needs to be locked around insertion/deletion. In addition to this, the
transcoder entries (values in the second-level hash table) need to be locked around retrieving them and
loading them as they are loaded lazily.
The transcoding objects (`Encoding::Converter`) can't be made shareable, so their operations don't need to be locked.
This commit extracts the Ractor safe table used for frozen strings into
ractor_safe_table.c, which will allow it to be used elsewhere, including
for the global symbol table.
[Bug #17516]
`fork(2)` only leave the calling thread alive in the child.
Because of this forking from the non-main ractor can easily
leave the VM in a corrupted state.
It may be possible in the future to carefully allow forking from non-main
Ractor, but shot term it's preferable to add this restriction.
Using this `reg_cache` is racy across ractors, so don't use it when in a
ractor. Also, its use across ractors can cause a regular expression created
in 1 ractor to be used in another ractor (an isolation bug).
This behave almost exactly as a T_OBJECT, the layout is entirely
compatible.
This aims to solve two problems.
First, it solves the problem of namspaced classes having
a single `shape_id`. Now each namespaced classext
has an object that can hold the namespace specific
shape.
Second, it open the door to later make class instance variable
writes atomics, hence be able to read class variables
without locking the VM.
In the future, in multi-ractor mode, we can do the write
on a copy of the `fields_obj` and then atomically swap it.
Considerations:
- Right now the `RClass` shape_id is always synchronized,
but with namespace we should likely mark classes that have
multiple namespace with a specific shape flag.
