From 86a9a52355905e4ac71730dba5c325498fd05177 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Tue, 26 Nov 2019 21:25:11 +0100
Subject: [PATCH] Kernel: Process::for_each_thread() should show the main
 thread of PID 0

---
 Kernel/Process.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Kernel/Process.h b/Kernel/Process.h
index 31315c1557..476f1162c4 100644
--- a/Kernel/Process.h
+++ b/Kernel/Process.h
@@ -461,6 +461,13 @@ inline void Process::for_each_thread(Callback callback) const
 {
     InterruptDisabler disabler;
     pid_t my_pid = pid();
+
+    if (my_pid == 0) {
+        // NOTE: Special case the colonel thread, since its main thread is not in the global thread table.
+        callback(const_cast<Thread&>(main_thread()));
+        return;
+    }
+
     Thread::for_each([callback, my_pid](Thread& thread) -> IterationDecision {
         if (thread.pid() == my_pid)
             return callback(thread);