Skip to content

Add some testing of __builtin_thread_pointer. NFC #26718

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
sbc100 merged 1 commit into from
Apr 18, 2026
+12 −3
Merged

Add some testing of __builtin_thread_pointer. NFC #26718

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 12 additions & 3 deletions test/wasm_worker/wasm_worker_and_pthread.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,10 @@ _Atomic pid_t main_tid = 0;
_Atomic pid_t pthread_tid = 0;
_Atomic pid_t worker_tid = 0;

void* _Atomic main_ptr = 0;
void* _Atomic pthread_ptr = 0;
void* _Atomic worker_ptr = 0;

EM_JS(int, am_i_pthread, (), {
return ENVIRONMENT_IS_PTHREAD;
});
Expand All @@ -21,8 +25,10 @@ EM_JS(int, am_i_wasm_worker, (), {

void *thread_main(void *arg) {
pthread_tid = gettid();
emscripten_outf("hello from pthread! (tid=%d)", pthread_tid);
pthread_ptr = __builtin_thread_pointer();
emscripten_outf("hello from pthread! (tid=%d) (ptr=%p)", pthread_tid, pthread_ptr);
assert(pthread_tid && pthread_tid > main_tid);
assert(pthread_ptr && pthread_ptr != main_ptr);
assert(am_i_pthread());
assert(!am_i_wasm_worker());
assert(!emscripten_current_thread_is_wasm_worker());
Expand All @@ -32,8 +38,10 @@ void *thread_main(void *arg) {

void worker_main() {
worker_tid = gettid();
emscripten_outf("hello from wasm worker! (tid=%d)", worker_tid);
worker_ptr = __builtin_thread_pointer();
emscripten_outf("hello from wasm worker! (tid=%d) (ptr=%p)", worker_tid, worker_ptr);
assert(worker_tid && worker_tid > pthread_tid);
assert(worker_ptr && worker_ptr != pthread_ptr);
assert(!am_i_pthread());
assert(am_i_wasm_worker());
assert(emscripten_current_thread_is_wasm_worker());
Expand All @@ -46,7 +54,8 @@ void worker_main() {

int main() {
main_tid = gettid();
emscripten_outf("in main (tid=%d)", main_tid);
main_ptr = __builtin_thread_pointer();
emscripten_outf("in main (tid=%d) (ptr=%p)", main_tid, main_ptr);
assert(main_tid > 0);
pthread_t thread;
pthread_create(&thread, NULL, thread_main, NULL);
Expand Down
Loading