In Linux when writing to various files in the virtual file system,
for example /sys/fs/cgroup, if you write an invalid value to a file
you'll get errno 16.
This change allows for these specific cases to be caught instead of
being lumped together in UnexpectedError.
This introduces a new builtin function that compiles down to something that results in an illegal instruction exception/interrupt.
It can be used to exit a program abnormally.
This implements the builtin for all backends.
If I could mark a builtin function as cold, I would mark @setCold as cold.
We have run out of `Zir.Inst.Tag`s so I had to move a tag from Zir.Inst.Tag to
Zir.Inst.Extended. This is because a new noreturn builtin will be added and
noreturn builtins cannot be part of Inst.Tag:
```
/// `noreturn` instructions may not go here; they must be part of the main `Tag` enum.
pub const Extended = enum(u16) {
```
Here's another reason I went for @setCold:
```
$ git grep setRuntimeSafety | wc -l
322
$ git grep setCold | wc -l
79
$ git grep setEvalBranchQuota | wc -l
82
```
This also simply removes @setCold from Autodoc and the docs frontend because
as far as I could understand it, builtins represented using Zir extended
instructions are not yet supported because I couldn't find
@setStackAlign or @setFloatMode there, either.
Give +x to the .wasm file if it is an executable and the OS is WASI.
Some systems may be configured to execute such binaries directly. Even
if that is not the case, it means we will get "exec format error" when
trying to run it rather than "access denied", and then can react to that
in the same way as trying to run an ELF file from a foreign CPU
architecture.
This is part of the strategy to unify RunStep and EmulatableRunStep.
- Use .flash as the default address space for functions on AVR
- Return .flash as the address space for function pointers on AVR
without explicit address space
Previously, this API had pid, to be used on POSIX systems, and handle,
to be used on Windows.
This commit unifies the API, defining an Id type that is either the pid
or the HANDLE depending on the target OS.
This commit also prepares for the future by allowing one to import via
`std.process.Child` which is the fully qualified namespace that I intend
to migrate to in the future.
Also add `std.fs.has_executable_bit` for doing conditional compilation.
This adds the linux syscalls for chmod and fchmodat, as well as the
extern libc function declarations.
Only `fchmodat` is added to `std.os`, and it is not yet added to std.fs.
