From bdcd73cd63fc5ec5b61fad6133f93b761073eddc Mon Sep 17 00:00:00 2001
From: losfair <zhy20000919@hotmail.com>
Date: Thu, 22 Aug 2019 17:45:52 -0700
Subject: [PATCH] Unblock signals in LLVM trap handler.

---
 lib/llvm-backend/src/platform/unix.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/llvm-backend/src/platform/unix.rs b/lib/llvm-backend/src/platform/unix.rs
index 9e77c57d6..88ceb6854 100644
--- a/lib/llvm-backend/src/platform/unix.rs
+++ b/lib/llvm-backend/src/platform/unix.rs
@@ -69,6 +69,9 @@ extern "C" fn signal_trap_handler(
     _ucontext: *mut c_void,
 ) {
     unsafe {
+        if SigSet::all().thread_unblock().is_err() {
+            std::process::abort();
+        }
         // Apparently, we can unwind from arbitary instructions, as long
         // as we don't need to catch the exception inside the function that
         // was interrupted.