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Kernel: Restore the previous thread state on SIGCONT after SIGSTOP

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When stopping a thread with the SIGSTOP signal, we now store the thread
state in Thread::m_stop_state. That state is then restored on SIGCONT.
This fixes an issue where previously-blocked threads would unblock
upon resume. Now they simply resume in the Blocked state, and it's up
to the regular unblocking mechanism to unblock them.

Fixes #1326.
This commit is contained in:
Andreas Kling 2020-03-01 15:14:17 +01:00
parent fbe9aad70a
commit 2839bb0be1
2 changed files with 11 additions and 4 deletions
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1
Kernel/Thread.h
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@ -486,6 +486,7 @@ private:
u32 m_priority_boost { 0 };
u8 m_stop_signal { 0 };
State m_stop_state { Invalid };
bool m_dump_backtrace_on_finalization { false };
bool m_should_die { false };