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Kernel: Fix a nasty lock bug with exec()

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Exec doesn't leave through the syscall handler, so it didn't unlock the
big_lock. This means that reentering can lock it again, and then another
thread could endlessly yield waiting to acquire the lock (futilely).

This fixes AudioServer using 100% CPU.
This commit is contained in:
Robin Burchell 2019-07-17 14:15:13 +02:00 • committed by Andreas Kling
commit a648331e26
Notes: sideshowbarker 2024-07-19 13:13:10 +09:00
1 changed files with 1 additions and 0 deletions
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1
Kernel/Process.cpp
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@ -442,6 +442,7 @@ int Process::do_exec(String path, Vector<String> arguments, Vector<String> envir
#endif #endif
main_thread().set_state(Thread::State::Skip1SchedulerPass); main_thread().set_state(Thread::State::Skip1SchedulerPass);
big_lock().unlock_if_locked();
return 0; return 0;
} }