* Fixes for the THREAD_MODEL=posix build
* Fix expected symbols from previous commit
* Enable `lock` in `random.c` when threads are enabled
This uses the `_REENTRANT` definition to indicate when the `lock` should
be available.
* Disable `aio.h` when compiling for threads
In talking to @sunfishcode about `aio.h`, this functionality is not yet
a primary concern (it was already disabled in the default,
single-threaded mode). Additionally, this change adds expectation lines
for the new symbols/includes added and removed by `pthread.h`.
This change was reached by running:
```console
$ git diff --no-index expected/wasm32-wasi sysroot/share/wasm32-wasi > patch.diff
# replace "sysroot/share" with "expected" in `patch.diff`
$ git apply patch.diff --reject
# manually fix any rejections
```
* Specify the TLS model until LLVM 15 is released
The `-ftls-model` configuration can be removed once https://reviews.llvm.org/D130053 makes its way into an upstream release.
* Rename `__wasi_libc_pthread_self` to `__wasilibc_pthread_self`
The symbol is still undefined, though.
* Add different sets of expected output based on THREAD_MODEL
* Re-add trailing whitespace to `predefined-macros.txt`
@sbc100 wanted to retain the whitespace trailing after certain
predefined macro lines. This change restores that whitespace from
upstream and re-generates the POSIX version using the following command:
```console
$ git diff --no-index expected/wasm32-wasi/posix/predefined-macros.txt sysroot/share/wasm32-wasi/predefined-macros.txt | sed 's/sysroot\/share\/wasm32-wasi/expected\/wasm32-wasi\/posix/' | git apply
```
* Protect `preopens.c` against concurrent access
* Only build thread-capable wasi-libc on latest version of Clang
* Use `thrd_sleep` from MUSL instead of aliasing `nanosleep`
* Define `pthread_setcancelstate` in `THREAD_MODEL=posix` builds
There are other options here (e.g., always define the `pthread_*`
symbols with stubs) but until we discuss that this is an intermediate
working step.
* Define a Wasm global to store `pthread_self`
* Remove `g_needs_dynamic_alloc` global
* Document the state of pthread support
* review: de-duplicate symbols based on #314
* review: only define `__wasilibc_cwd_{un}lock` when needed
* review: add #ifdefs to `__pthread_setcancelstate`
* review: add additional #ifdefs to `pthread_self.c`
* review: put lock definition behind #ifdef _REENTRANT
* review: remove pthread_setcancelstate.c
* review: re-fix indentation
* review: alias __clock_nanosleep in bottom half
* review: remove extra line
Co-authored-by: Sam Clegg <sbc@chromium.org>
This change extracts the `weak*`-related parts of #303 as a separate PR.
Note that this is slightly strange in that it uses some top-half MUSL
headers in the bottom-half code, but discussion around this led me to
believe that the advantages of, e.g., `LOCK` made this worthwhile.
Beyond just changing uses of `weak` to `__weak__`, we also MUSL's `weak`
and `weak_alias` macros in a few more places.
* Make __wasi_linkcount_t a uint64_t (#134)
Refs: https://github.com/WebAssembly/WASI/pull/127
* Generate the WASI interface from witx.
This replaces the hand-maintained <wasi/core.h> header with a
<wasi/api.h> generated from witx.
Most of the churn here is caused by upstream WASI renamings; hopefully
in the future ABI updates will be less noisy.
Some systems, such as Darwin, only declare getentropy in <sys/random.h>,
so declare it there on WASI too for compatibility.
Also, give getentropy the underscore-prefix/weak-symbol treatment, as
it's not a standard-reserved identifier.
