Fix segfault while profiling task switching (JuliaLang#42973)

daviehh · Nov 8, 2021 · 12b9bec · 12b9bec
1 parent d2b5a13
commit 12b9bec
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/signals-unix.c b/src/signals-unix.c
@@ -452,6 +452,8 @@ void usr2_handler(int sig, siginfo_t *info, void *ctx)
     if (ct == NULL)
         return;
     jl_ptls_t ptls = ct->ptls;
+    if (ptls == NULL)
+        return;
     int errno_save = errno;
     sig_atomic_t request = jl_atomic_exchange(&ptls->signal_request, 0);
 #if !defined(JL_DISABLE_LIBUNWIND)