fix possible hang

nia-e · nia-e · commit eaea6562f9f8 · 2025-06-17T18:57:33.000+02:00
diff --git a/src/shims/trace/child.rs b/src/shims/trace/child.rs
@@ -220,6 +220,10 @@ pub unsafe fn init_sv() -> Result<(), SvInitError> {
                 }
             }
             unistd::ForkResult::Child => {
+                // Make sure we never get orphaned and stuck in SIGSTOP or similar
+                // SAFETY: prctl PR_SET_PDEATHSIG is always safe to call
+                let ret = libc::prctl(libc::PR_SET_PDEATHSIG, libc::SIGTERM);
+                assert_ne!(ret, 0);
                 // First make sure the parent succeeded with ptracing us!
                 signal::raise(signal::SIGSTOP).unwrap();
                 // If we're the child process, save the supervisor info

Original file line number	Diff line number	Diff line change
`@@ -220,6 +220,10 @@ pub unsafe fn init_sv() -> Result<(), SvInitError> {`
`220`	`220`	`}`
`221`	`221`	`}`
`222`	`222`	`unistd::ForkResult::Child => {`
	`223`	`+ // Make sure we never get orphaned and stuck in SIGSTOP or similar`
	`224`	`+ // SAFETY: prctl PR_SET_PDEATHSIG is always safe to call`
	`225`	`+ let ret = libc::prctl(libc::PR_SET_PDEATHSIG, libc::SIGTERM);`
	`226`	`+ assert_ne!(ret, 0);`
`223`	`227`	`// First make sure the parent succeeded with ptracing us!`
`224`	`228`	`signal::raise(signal::SIGSTOP).unwrap();`
`225`	`229`	`// If we're the child process, save the supervisor info`