afl-llvm-fix.diff

--- llvm_mode/afl-llvm-rt.o.c.orig	2018-04-16 13:46:15.409800802 +0000
+++ llvm_mode/afl-llvm-rt.o.c	2018-04-16 13:47:04.845566296 +0000
@@ -98,6 +98,8 @@
   s32 child_pid;
 
   u8  child_stopped = 0;
+  
+  void (*old_sigchld_handler)(int) = signal(SIGCHLD, SIG_DFL);
 
   /* Phone home and tell the parent that we're OK. If parent isn't there,
      assume we're not running in forkserver mode and just execute program. */
@@ -132,6 +134,7 @@
       /* In child process: close fds, resume execution. */
 
       if (!child_pid) {
+        signal(SIGCHLD, old_sigchld_handler);
 
         close(FORKSRV_FD);
         close(FORKSRV_FD + 1);