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Kernel: Track when a thread is in the middle of crashing

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There are certain checks that we should skip if the system is crashing.
The system can avoid stack overflow during crash, or even triple
faulting while while handling issues that can causes recursive panics
or aborts.
This commit is contained in:
Brian Gianforcaro 2021-09-07 00:17:45 -07:00 • committed by Andreas Kling
parent f56bdd2bb7
commit 0718afa773
3 changed files with 15 additions and 0 deletions
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4
Kernel/Thread.h
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@ -1186,6 +1186,9 @@ public:
void set_idle_thread() { m_is_idle_thread = true; }
bool is_idle_thread() const { return m_is_idle_thread; }
void set_crashing() { m_is_crashing = true; }
[[nodiscard]] bool is_crashing() const { return m_is_crashing; }
ALWAYS_INLINE u32 enter_profiler()
{
return m_nested_profiler_calls.fetch_add(1, AK::MemoryOrder::memory_order_acq_rel);
@ -1343,6 +1346,7 @@ private:
bool m_initialized { false };
bool m_in_block { false };
bool m_is_idle_thread { false };
bool m_is_crashing { false };
Atomic<bool> m_have_any_unmasked_pending_signals { false };
Atomic<u32> m_nested_profiler_calls { 0 };