From 3f9b6813f791410ea5e1cbab4f2f3926c2ff4200 Mon Sep 17 00:00:00 2001
From: Daniel Samson <12231216+daniel-samson@users.noreply.github.com>
Date: Thu, 30 Jul 2026 04:24:34 +0100
Subject: [PATCH] build: thread-test package opts back into threading
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Wave C dropped the .threaded flag the old addThreadedUserBinary call
carried, so thread-test compiled single_threaded: the heap mutex was
compiled out and atomics lowered to plain ops while the fixture spawns
real kernel threads — the QEMU thread-alloc case caught it (corruption
under concurrent allocation), and the completion review confirmed the
same finding independently. All 12 QEMU thread cases pass again.
---
 test/system/services/thread-test/build.zig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/system/services/thread-test/build.zig b/test/system/services/thread-test/build.zig
index ba0ffe1..ce33224 100644
--- a/test/system/services/thread-test/build.zig
+++ b/test/system/services/thread-test/build.zig
@@ -11,6 +11,7 @@ pub fn build(b: *std.Build) void {
         .name = "thread-test",
         .root_source_file = b.path("thread-test.zig"),
         .domains = build_support.domains(b),
+        .threaded = true, // real atomics/TLS (docs/threading.md)
     });
     b.installArtifact(exe);
 }