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Kernel: Require a reason to be passed to Thread::wait_on

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The Lock class still permits no reason, but for everything else
require a reason to be passed to Thread::wait_on. This makes it
easier to diagnose why a Thread is in Queued state.
This commit is contained in:
Tom
2020-07-04 15:55:20 -06:00
committed by Andreas Kling
parent 0c4b0c0312
commit 788b2d64c6
11 changed files with 19 additions and 11 deletions
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4
Kernel/Thread.cpp
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@@ -852,7 +852,7 @@ const LogStream& operator<<(const LogStream& stream, const Thread& value)
return stream << value.process().name() << "(" << value.pid() << ":" << value.tid() << ")";
}
Thread::BlockResult Thread::wait_on(WaitQueue& queue, timeval* timeout, Atomic<bool>* lock, Thread* beneficiary, const char* reason)
Thread::BlockResult Thread::wait_on(WaitQueue& queue, const char* reason, timeval* timeout, Atomic<bool>* lock, Thread* beneficiary)
{
TimerId timer_id {};
u32 prev_crit;
@@ -864,6 +864,7 @@ Thread::BlockResult Thread::wait_on(WaitQueue& queue, timeval* timeout, Atomic<b
if (lock)
*lock = false;
set_state(State::Queued);
m_wait_reason = reason;
queue.enqueue(*Thread::current());
@@ -899,6 +900,7 @@ void Thread::wake_from_queue()
{
ScopedSpinLock lock(g_scheduler_lock);
ASSERT(state() == State::Queued);
m_wait_reason = nullptr;
if (this != Thread::current())
set_state(State::Runnable);
else