[Lldb-commits] [lldb] Avoid stalls when MainLoop::Interrupt fails to wake up the MainLoop (PR #164905)

[Alex Langford via lldb-commits]

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@@ -387,10 +387,13 @@ void MainLoopPosix::ProcessSignal(int signo) {
   }
 }
 
-void MainLoopPosix::Interrupt() {
+bool MainLoopPosix::Interrupt() {
   if (m_interrupting.exchange(true))
-    return;
+    return true;
 
   char c = '.';
-  cantFail(m_interrupt_pipe.Write(&c, 1));
+  llvm::Expected<size_t> result = m_interrupt_pipe.Write(&c, 1);
+  if (result && *result != 0)
+    return true;
+  return false;
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bulbazord wrote:

Minor Suggestion: `return result && *result != 0`

https://github.com/llvm/llvm-project/pull/164905