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Kernel: Add SMP message StackTrace 

This event is sent when user presses ctrl+{F1-F12} and it will dump the
corresponding processor's stack trace. This is really helpful for
detecting deadlocks in the system
This commit is contained in:
Bananymous 2025-06-02 11:22:57 +03:00
parent c5b0d0235f
commit 7a645b8555
3 changed files with 37 additions and 1 deletions
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2
kernel/include/kernel/Processor.h
View File

@ -33,6 +33,7 @@ namespace Kernel
FlushTLB,
NewThread,
UnblockThread,
StackTrace,
};
SMPMessage* next { nullptr };
Type type;
@ -45,6 +46,7 @@ namespace Kernel
} flush_tlb;
SchedulerQueue::Node* new_thread;
SchedulerQueue::Node* unblock_thread;
bool dummy;
};
};

32
kernel/kernel/Input/InputDevice.cpp
View File

@ -114,7 +114,37 @@ namespace Kernel
auto& key_event = event.as<const LibInput::RawKeyEvent>();
if (key_event.modifier & LibInput::KeyEvent::Modifier::Pressed)
{
switch (key_event.keycode)
if (key_event.modifier & LibInput::KeyEvent::Modifier::LCtrl)
{
const auto processor_count = Processor::count();
switch (key_event.keycode)
{
#define DUMP_CPU_STACK_TRACE(idx) \
case LibInput::keycode_function(idx + 1): \
if (idx >= processor_count) \
break; \
Processor::send_smp_message(Processor::id_from_index(idx), { \
.type = Processor::SMPMessage::Type::StackTrace, \
.dummy = false, \
}); \
break
// F1-F12
DUMP_CPU_STACK_TRACE(0);
DUMP_CPU_STACK_TRACE(1);
DUMP_CPU_STACK_TRACE(2);
DUMP_CPU_STACK_TRACE(3);
DUMP_CPU_STACK_TRACE(4);
DUMP_CPU_STACK_TRACE(5);
DUMP_CPU_STACK_TRACE(6);
DUMP_CPU_STACK_TRACE(7);
DUMP_CPU_STACK_TRACE(8);
DUMP_CPU_STACK_TRACE(9);
DUMP_CPU_STACK_TRACE(10);
DUMP_CPU_STACK_TRACE(11);
#undef DUMP_CPU_STACK_TRACE
}
}
else switch (key_event.keycode)
{
case LibInput::keycode_function(1):
Processor::toggle_should_print_cpu_load();

4
kernel/kernel/Processor.cpp
View File

@ -244,6 +244,10 @@ namespace Kernel
case SMPMessage::Type::UnblockThread:
processor.m_scheduler->unblock_thread(message->unblock_thread);
break;
case SMPMessage::Type::StackTrace:
dwarnln("Stack trace of CPU {}", current_id().as_u32());
Debug::dump_stack_trace();
break;
}
last_handled = message;