From 4af84433f54cae3e2fc585ecca4beea22afc3bdf Mon Sep 17 00:00:00 2001
From: PistonMiner <pistonminer@gmail.com>
Date: Mon, 22 Feb 2021 00:57:06 +0100
Subject: [PATCH] rel: Add basic evt debugging features

* Table view
* Overflow detection
---
 ttyd-tools/rel/source/con_evt.cpp | 103 ++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 ttyd-tools/rel/source/con_evt.cpp

diff --git a/ttyd-tools/rel/source/con_evt.cpp b/ttyd-tools/rel/source/con_evt.cpp
new file mode 100644
index 00000000..bb3ad196
--- /dev/null
+++ b/ttyd-tools/rel/source/con_evt.cpp
@@ -0,0 +1,103 @@
+#include "mod.h"
+#include "console.h"
+#include "patch.h"
+
+#include <ttyd/dispdrv.h>
+#include <ttyd/evtmgr.h>
+#include <gc/demo.h>
+
+namespace mod {
+
+ConIntVar evt_show_table("evt_show_table", 0);
+
+MOD_UPDATE_FUNCTION()
+{
+	if (!evt_show_table.value)
+		return;
+
+	ttyd::dispdrv::dispEntry(ttyd::dispdrv::CameraId::kDebug, 1, 0.f, [](ttyd::dispdrv::CameraId layerId, void *user)
+	{
+		auto wp = ttyd::evtmgr::evtGetWork();
+
+		if (!wp || !wp->entries)
+		{
+			return;
+		}
+
+		// Draw evt table.
+		gc::demo::DEMOInitCaption(2, 608, 480);
+
+		int allocatedCount = 0;
+		const int kEvtCapacity = 256;
+		const int kColumnCount = 8;
+		const int kRowCount = kEvtCapacity / kColumnCount;
+		for (int col = 0; col < kColumnCount; ++col)
+		{
+			for (int row = 0; row < kRowCount; ++row)
+			{
+				int evtIndex = col * kRowCount + row;
+				auto evt = &wp->entries[evtIndex];
+
+				int x = 2 + col * (9 * 8 + 4);
+				int y = 64 + row * 8;
+
+				char statusCode;
+				if (!(evt->flags & 1))
+				{
+					statusCode = 'U';
+				}
+				else if (evt->flags & 0x02)
+				{
+					statusCode = 'S';
+				}
+				else if (evt->flags & 0x10)
+				{
+					statusCode = 'W';
+				}
+				else
+				{
+					statusCode = 'R';
+				}
+
+				if (evt->flags & 1)
+				{
+					++allocatedCount;
+				}
+
+				void *addr = evt->wCurrentCommandPtr;
+				if (!(reinterpret_cast<uint32_t>(addr) & 0x01000000))
+				{
+					statusCode += 0x20;
+				}
+
+				gc::demo::DEMOPrintf(
+					x, y, 0,
+					"%02x%c%06x",
+					evtIndex,
+					statusCode,
+					reinterpret_cast<uint32_t>(addr) & 0x00ffffff
+				);
+			}
+		}
+
+		gc::demo::DEMOPrintf(2, 56, 0, "capacity: %d/%d", allocatedCount, wp->entryCount);
+	}, nullptr);
+}
+
+#if TTYD_US
+MOD_INIT_FUNCTION()
+{
+	patch::hookInstruction(
+		reinterpret_cast<uint8_t *>(ttyd::evtmgr::evtEntry) + 0x6c,
+		[](gc::os::OSContext *context, void *user)
+		{
+			if (context->ctr == 0)
+			{
+				gConsole->logError("evt overflow\n");
+			}
+		}
+	);
+}
+#endif
+
+}
\ No newline at end of file