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dcd28cf8f6
* 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>
21 lines
337 B
C
21 lines
337 B
C
#include <errno.h>
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#include <unistd.h>
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#include <wasi/api.h>
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int __getentropy(void *buffer, size_t len) {
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if (len > 256) {
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errno = EIO;
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return -1;
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}
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int r = __wasi_random_get(buffer, len);
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if (r != 0) {
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errno = r;
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return -1;
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}
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return 0;
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}
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weak_alias(__getentropy, getentropy);
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