* threads: implement init of TLS and stack pointer
* fix: rename wasi_snapshot_preview2_thread_spawn to wasi_thread_spawn
Signed-off-by: Harald Hoyer <harald@profian.com>
* fix: change signature of wasi_thread_start
Signed-off-by: Harald Hoyer <harald@profian.com>
* fix: pthread_exit for WASI
Can't use `exit()` because it is too high level.
Have to unlock the thread list.
Signed-off-by: Harald Hoyer <harald@profian.com>
* fix: initialize struct pthread for the main thread
Signed-off-by: Harald Hoyer <harald@profian.com>
* fix: store the aligned stack minus `struct start_args`
Signed-off-by: Harald Hoyer <harald@profian.com>
Signed-off-by: Harald Hoyer <harald@profian.com>
Co-authored-by: Harald Hoyer <harald@profian.com>
* Add a check to command modules to ensure that they're only started once.
Wasm command modules should only be called once per instance, because
the programming model doesn't leave linear memory in a reusable state
when the program exits. As use cases arise for loading wasm modules in
environments that want to treat them like reactors, add a safety check
to ensure that command modules are used according to their
expectations.
Previously, "new-style commmands" considered every user-defined
export to be a potential command entrypoint, so wasi-libc and wasm-ld
cooperated to run the user's static constructors on each entrypoint.
This form of new-style command turned out not to be useful, and it
interferes with some use cases, so disable it.
This is done by making an explicit call to `__wasm_call_ctors`, which
tells wasm-ld that it shouldn't synthesize any calls to
`__wasm_call_ctors` on its own.
* Remove support for `__original_main`.
This was used in old LLVM versions. Recent LLVM versions all emit either
`__main_void` or `__main_argv_argc`, so we can use those directly.
* Update the CI to use LLVM 14.0.0.
This adds a new crt1-command.c startup file, which uses
[new-style command support]. Instead of calling `__wasm_call_ctors`
and `__wasm_call_dtors` directly, this lets wasm-ld automatically call
them.
This preserves the existing crt1.c, so that the same wasi-libc build
can support old-style and new-style commands, for compatibility during
the transition.
[new-style command support]: https://reviews.llvm.org/D81689
Co-authored-by: Dan Gohman <sunfish@mozilla.com>
