From 3a1c22bb9331f4f54794cdb9b7168c8db7061173 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Thu, 4 May 2023 23:32:48 +0200
Subject: [PATCH] kernel: Add keyboard combinations for debug information dumps

Ctrl+Alt+E: Dump threads
Ctrl+Alt+M: Dump memory usage
Ctrl+Alt+H: Dump heap state
---
 kernel/src/fs/devices/ConsoleDevice.cpp | 24 ++++++++++++++++++++++++
 kernel/src/thread/Scheduler.cpp         | 22 ++++++++++++++++++++++
 kernel/src/thread/Scheduler.h           |  2 ++
 3 files changed, 48 insertions(+)

diff --git a/kernel/src/fs/devices/ConsoleDevice.cpp b/kernel/src/fs/devices/ConsoleDevice.cpp
index dda6d021..2449e1c0 100644
--- a/kernel/src/fs/devices/ConsoleDevice.cpp
+++ b/kernel/src/fs/devices/ConsoleDevice.cpp
@@ -1,10 +1,13 @@
 #include "fs/devices/ConsoleDevice.h"
+#include "Log.h"
 #include "arch/Keyboard.h"
 #include "memory/MemoryManager.h"
+#include "thread/Scheduler.h"
 #include "video/TextConsole.h"
 #include <bits/termios.h>
 #include <luna/Buffer.h>
 #include <luna/CString.h>
+#include <luna/Units.h>
 #include <luna/Vector.h>
 
 static Buffer g_console_input;
@@ -63,6 +66,27 @@ void ConsoleDevice::did_press_key(char key)
         return;
     }
 
+    if (key == 'e' && (Keyboard::modifiers() & (Keyboard::LeftAlt | Keyboard::LeftControl)))
+    {
+        Scheduler::dump_state();
+        return;
+    }
+
+    if (key == 'm' && (Keyboard::modifiers() & (Keyboard::LeftAlt | Keyboard::LeftControl)))
+    {
+        kinfoln("Total memory:    %s", to_dynamic_unit(MemoryManager::total()).release_value().chars());
+        kinfoln("Free memory:     %s", to_dynamic_unit(MemoryManager::free()).release_value().chars());
+        kinfoln("Used memory:     %s", to_dynamic_unit(MemoryManager::used()).release_value().chars());
+        kinfoln("Reserved memory: %s", to_dynamic_unit(MemoryManager::reserved()).release_value().chars());
+        return;
+    }
+
+    if (key == 'h' && (Keyboard::modifiers() & (Keyboard::LeftAlt | Keyboard::LeftControl)))
+    {
+        dump_heap_usage();
+        return;
+    }
+
     g_temp_input.try_append((u8)key).value();
 
     if (key == '\n')
diff --git a/kernel/src/thread/Scheduler.cpp b/kernel/src/thread/Scheduler.cpp
index 8aa5a71a..72800046 100644
--- a/kernel/src/thread/Scheduler.cpp
+++ b/kernel/src/thread/Scheduler.cpp
@@ -327,6 +327,28 @@ namespace Scheduler
 
         return result;
     }
+
+    void dump_state()
+    {
+        CPU::disable_interrupts();
+
+        kdbgln("--- BEGIN SCHEDULER DUMP ---");
+        kdbgln("current at %p, id = %zu", g_current, g_current->id);
+
+        for (const auto* thread : g_threads)
+        {
+            kdbgln("%p %c [%-20s] %4zu, parent = (%-18p,%zu), state = %d, ticks: (t:%04zu,k:%04zu,u:%04zu), status = "
+                   "%d, cwd = %s",
+                   thread, thread->is_kernel ? 'k' : 'u', thread->name.chars(), thread->id, thread->parent,
+                   thread->parent ? thread->parent->id : 0, (int)thread->state, thread->ticks, thread->ticks_in_kernel,
+                   thread->ticks_in_user, thread->status,
+                   thread->current_directory_path.is_empty() ? "/" : thread->current_directory_path.chars());
+        }
+
+        kdbgln("--- END SCHEDULER DUMP ---");
+
+        CPU::enable_interrupts();
+    }
 }
 
 void kernel_sleep(u64 ms)
diff --git a/kernel/src/thread/Scheduler.h b/kernel/src/thread/Scheduler.h
index 5dbc19cc..f34a731d 100644
--- a/kernel/src/thread/Scheduler.h
+++ b/kernel/src/thread/Scheduler.h
@@ -45,6 +45,8 @@ namespace Scheduler
         }
     }
 
+    void dump_state();
+
     bool has_children(Thread* thread);
 
     Option<Thread*> find_exited_child(Thread* thread);