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std.Thread: don't export wasi_thread_start in single-threaded mode

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This commit is contained in:
Andrew Kelley 2024-12-15 20:51:46 -08:00
parent 0555fe8d5b
commit 70414c1f43
1 changed files with 8 additions and 5 deletions
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13
lib/std/Thread.zig
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@ -1018,12 +1018,15 @@ const WasiThreadImpl = struct {
return .{ .thread = &instance.thread };
}
/// Bootstrap procedure, called by the host environment after thread creation.
export fn wasi_thread_start(tid: i32, arg: *Instance) void {
if (builtin.single_threaded) {
// ensure function is not analyzed in single-threaded mode
return;
comptime {
if (!builtin.single_threaded) {
@export(wasi_thread_start, .{ .name = "wasi_thread_start" });
}
}
/// Called by the host environment after thread creation.
fn wasi_thread_start(tid: i32, arg: *Instance) callconv(.c) void {
comptime assert(!builtin.single_threaded);
__set_stack_pointer(arg.thread.memory.ptr + arg.stack_offset);
__wasm_init_tls(arg.thread.memory.ptr + arg.tls_offset);
@atomicStore(u32, &WasiThreadImpl.tls_thread_id, @intCast(tid), .seq_cst);