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-rw-r--r--src/thread/synccall.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/thread/synccall.c b/src/thread/synccall.c
index 648a6ad4..d58c851f 100644
--- a/src/thread/synccall.c
+++ b/src/thread/synccall.c
@@ -63,7 +63,8 @@ void __synccall(void (*func)(void *), void *ctx)
sem_init(&target_sem, 0, 0);
sem_init(&caller_sem, 0, 0);
- if (!libc.threads_minus_1) goto single_threaded;
+ if (!libc.threads_minus_1 || __syscall(SYS_gettid) != self->tid)
+ goto single_threaded;
callback = func;
context = ctx;