Hook registry: list installed hooks + call counts in Injection panel

Add a process-wide hook registry (hook/src/hook_registry) that every hook
module registers its hooks with and bumps a counter from each detour. The
XInput, focus-spoof, and audio render-hooks now register their individual
hooks (XInputGetState/Ex/Caps/SetState; GetForegroundWindow/GetActiveWindow/
GetFocus/WndProc guard; IMMDevice::Activate, IAudioClient::Initialize/
GetService, IAudioRenderClient::GetBuffer/ReleaseBuffer) and count calls.

The worker publishes the table to the host each tick over a new HookStatus
field (protocol v4 -> v5: HookEntry[] + count). The Injection panel shows it
as a collapsible table grouped by subsystem with an installed flag and call
count per hook; coop_audio_probe prints the same table headless.

Verified against Phantom Brave: 13 hooks listed with live counts (focus APIs
polled heavily, GetBuffer/ReleaseBuffer ticking with the audio render loop).
All four tests pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -112,6 +112,11 @@ Done:
   forwarding, controller polling rate, mirror resolution, audio source + buffered
   ms) and reveal the verbose diagnostics (per-slot poll table, focus-API counts,
   input-path detection, per-render-stream table) only when Debug details is on.
+- **Installed-hooks list. ✅** The DLL keeps a registry of every individual hook
+  it installs (XInput, focus, audio), with a running call counter per hook,
+  reported over IPC. The Injection panel shows it grouped by subsystem
+  (input / focus / audio) so you can see exactly what's hooked and how busy each
+  hook is. `coop_audio_probe` prints the same table headless.
 
 Future work, roughly in priority order:
 

common/include/coop/protocol.hpp

@@ -11,7 +11,7 @@ namespace coop
 
 // Bump whenever the layout of SharedBlock or CoopPadState changes. The hook
 // refuses to attach to a host with a mismatched version.
-inline constexpr std::uint32_t kProtocolVersion = 4;
+inline constexpr std::uint32_t kProtocolVersion = 5;
 
 // 'COOP' little-endian, used to sanity-check the mapping before trusting it.
 inline constexpr std::uint32_t kProtocolMagic = 0x504F4F43u;
@@ -60,6 +60,28 @@ struct AudioStreamInfo
 	std::uint64_t frames_rendered;
 };
 
+// Orthogonal hook subsystems the host can install/remove independently.
+enum HookSubsystem : std::uint32_t
+{
+	HookSubsys_Input = 0, // XInput hooks (forward the guest pad)
+	HookSubsys_Focus = 1, // focus spoof (keep the game running unfocused)
+	HookSubsys_Audio = 2, // WASAPI render-hook (audio mirror without echo)
+	HookSubsys_Count = 3,
+};
+
+// Maximum individual hooks reported in the registry (a few per subsystem).
+inline constexpr std::uint32_t kMaxHookEntries = 24;
+
+// One installed hook, for the Injection panel's hook list. POD diagnostics, like
+// AudioStreamInfo: the hook is the sole writer; benign cross-process races are ok.
+struct HookEntry
+{
+	char name[40];          // e.g. "XInputGetState"
+	std::uint32_t subsystem; // HookSubsystem
+	std::uint32_t installed; // 1 if currently hooked
+	std::uint64_t calls;     // cumulative times the detour ran
+};
+
 // Indices into HookStatus::focus_query_calls.
 enum FocusApi : std::uint32_t
 {
@@ -97,6 +119,11 @@ struct HookStatus
 	// multi-stream game is visible before/without turning the mirror on.
 	std::uint32_t audio_streams_seen;                 // distinct render clients ever created
 	AudioStreamInfo audio_streams[kMaxAudioStreams];  // per-slot detail, [0] is primary
+
+	// Hook registry: every individual hook the DLL has installed, with a running
+	// call count. Lets the Injection panel list exactly what's hooked and how busy.
+	std::uint32_t hook_entry_count;
+	HookEntry hook_entries[kMaxHookEntries];
 };
 
 // Top-level shared block. The host is the sole writer of pad state; the hook is

hook/CMakeLists.txt

@@ -3,7 +3,8 @@ add_library(coop_hook SHARED
 	src/xinput_hook.cpp
 	src/focus_spoof.cpp
 	src/audio_hook.cpp
-	src/debug_log.cpp)
+	src/debug_log.cpp
+	src/hook_registry.cpp)
 
 target_include_directories(coop_hook PRIVATE src)
 

hook/src/audio_hook.cpp

@@ -14,6 +14,7 @@
 #include <safetyhook.hpp>
 
 #include "debug_log.hpp"
+#include "hook_registry.hpp"
 
 namespace coop::hook
 {
@@ -55,6 +56,13 @@ safetyhook::InlineHook g_hk_getbuffer;
 safetyhook::InlineHook g_hk_releasebuffer;
 bool g_audioclient_hooked = false;
 
+// Registry ids for the hook list.
+int g_id_activate = -1;
+int g_id_initialize = -1;
+int g_id_getservice = -1;
+int g_id_getbuffer = -1;
+int g_id_releasebuffer = -1;
+
 // Our own probe COM objects, created at anchor time purely to read the shared
 // IAudioClient / IAudioRenderClient vtables and hook GetBuffer/ReleaseBuffer
 // *proactively* — so render clients the game created before we injected (the
@@ -142,6 +150,7 @@ void try_register_lazy(IAudioRenderClient* rc);
 
 HRESULT STDMETHODCALLTYPE hk_GetBuffer(IAudioRenderClient* self, UINT32 num_frames, BYTE** data)
 {
+	hook_note_call(g_id_getbuffer);
 	const HRESULT hr = g_hk_getbuffer.call<HRESULT>(self, num_frames, data);
 	if (SUCCEEDED(hr) && data != nullptr)
 	{
@@ -154,6 +163,7 @@ HRESULT STDMETHODCALLTYPE hk_GetBuffer(IAudioRenderClient* self, UINT32 num_fram
 
 HRESULT STDMETHODCALLTYPE hk_ReleaseBuffer(IAudioRenderClient* self, UINT32 num_frames, DWORD flags)
 {
+	hook_note_call(g_id_releasebuffer);
 	// A render client we've never seen actively rendering is almost certainly one
 	// the game created before we injected; adopt it now (the first becomes the
 	// primary we capture). Skip our own silent probe client.
@@ -300,6 +310,7 @@ HRESULT STDMETHODCALLTYPE hk_Initialize(IAudioClient* self, AUDCLNT_SHAREMODE mo
                                         REFERENCE_TIME buffer_duration, REFERENCE_TIME periodicity,
                                         const WAVEFORMATEX* format, LPCGUID session)
 {
+	hook_note_call(g_id_initialize);
 	const HRESULT hr =
 	    g_hk_initialize.call<HRESULT>(self, mode, flags, buffer_duration, periodicity, format, session);
 	logf("hk_Initialize: client=%p mode=%d flags=0x%lX hr=0x%08lX fmt=%s", self, mode,
@@ -314,6 +325,7 @@ HRESULT STDMETHODCALLTYPE hk_Initialize(IAudioClient* self, AUDCLNT_SHAREMODE mo
 
 HRESULT STDMETHODCALLTYPE hk_GetService(IAudioClient* self, REFIID riid, void** ppv)
 {
+	hook_note_call(g_id_getservice);
 	const HRESULT hr = g_hk_getservice.call<HRESULT>(self, riid, ppv);
 	const bool is_render = (riid == __uuidof(IAudioRenderClient));
 	logf("hk_GetService: client=%p hr=0x%08lX render_client=%d", self, static_cast<unsigned long>(hr),
@@ -371,6 +383,7 @@ void install_audioclient_hooks(IAudioClient* ac)
 HRESULT STDMETHODCALLTYPE hk_Activate(IMMDevice* self, REFIID riid, DWORD cls_ctx, PROPVARIANT* params,
                                       void** ppv)
 {
+	hook_note_call(g_id_activate);
 	const HRESULT hr = g_hk_activate.call<HRESULT>(self, riid, cls_ctx, params, ppv);
 	const bool is_audioclient = (riid == __uuidof(IAudioClient) || riid == __uuidof(IAudioClient2) ||
 	                             riid == __uuidof(IAudioClient3));
@@ -395,6 +408,12 @@ bool install_audio_hooks(IpcClient& ipc, AudioRingHeader* ring)
 		return true; // anchor already installed
 	}
 
+	g_id_activate = hook_register("IMMDevice::Activate", HookSubsys_Audio);
+	g_id_initialize = hook_register("IAudioClient::Initialize", HookSubsys_Audio);
+	g_id_getservice = hook_register("IAudioClient::GetService", HookSubsys_Audio);
+	g_id_getbuffer = hook_register("IAudioRenderClient::GetBuffer", HookSubsys_Audio);
+	g_id_releasebuffer = hook_register("IAudioRenderClient::ReleaseBuffer", HookSubsys_Audio);
+
 	// Anchor: instantiate our own enumerator + default render device purely to
 	// read the shared IMMDevice vtable and hook Activate. Every IMMDevice in the
 	// process shares this vtable, so the game's Activate calls are intercepted.
@@ -471,6 +490,12 @@ bool install_audio_hooks(IpcClient& ipc, AudioRingHeader* ring)
 		// stay valid; they're released in remove_audio_hooks.
 	}
 
+	hook_set_installed(g_id_activate, static_cast<bool>(g_hk_activate));
+	hook_set_installed(g_id_initialize, static_cast<bool>(g_hk_initialize));
+	hook_set_installed(g_id_getservice, static_cast<bool>(g_hk_getservice));
+	hook_set_installed(g_id_getbuffer, static_cast<bool>(g_hk_getbuffer));
+	hook_set_installed(g_id_releasebuffer, static_cast<bool>(g_hk_releasebuffer));
+
 	logf("install_audio_hooks: activate=%d init=%d getsvc=%d getbuf=%d relbuf=%d (device=%p)",
 	     static_cast<bool>(g_hk_activate) ? 1 : 0, static_cast<bool>(g_hk_initialize) ? 1 : 0,
 	     static_cast<bool>(g_hk_getservice) ? 1 : 0, static_cast<bool>(g_hk_getbuffer) ? 1 : 0,
@@ -522,6 +547,11 @@ void remove_audio_hooks()
 	g_hk_initialize = {};
 	g_hk_activate = {};
 	g_audioclient_hooked = false;
+	hook_set_installed(g_id_activate, false);
+	hook_set_installed(g_id_initialize, false);
+	hook_set_installed(g_id_getservice, false);
+	hook_set_installed(g_id_getbuffer, false);
+	hook_set_installed(g_id_releasebuffer, false);
 
 	// Hooks are gone; safe to drop the probe objects that held the vtables.
 	if (IAudioRenderClient* sr = g_self_render.exchange(nullptr, std::memory_order_acq_rel))

hook/src/dllmain.cpp

@@ -17,6 +17,7 @@
 #include "coop/shared_memory.hpp"
 #include "debug_log.hpp"
 #include "focus_spoof.hpp"
+#include "hook_registry.hpp"
 #include "ipc_client.hpp"
 #include "xinput_hook.hpp"
 
@@ -97,6 +98,7 @@ DWORD WINAPI worker_thread(LPVOID)
 			coop::hook::republish_audio_format();
 		}
 		coop::hook::update_input_diagnostics(g_ipc); // refreshes each tick; registrations can change
+		coop::hook::hook_publish(g_ipc);             // installed-hooks list + call counts
 		g_ipc.heartbeat();
 		Sleep(250);
 	}
@@ -130,6 +132,7 @@ BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved)
 			coop::hook::remove_focus_spoof();
 			coop::hook::remove_xinput_hooks();
 			coop::hook::remove_audio_hooks();
+			coop::hook::hook_registry_reset();
 		}
 		break;
 	default:

hook/src/focus_spoof.cpp

@@ -6,6 +6,8 @@
 
 #include <safetyhook.hpp>
 
+#include "hook_registry.hpp"
+
 namespace coop::hook
 {
 
@@ -18,6 +20,11 @@ bool g_unicode = true;
 std::vector<safetyhook::InlineHook> g_focus_hooks;
 IpcClient* g_focus_ipc = nullptr;
 
+int g_id_foreground = -1;
+int g_id_active = -1;
+int g_id_focus = -1;
+int g_id_wndproc = -1;
+
 struct EnumContext
 {
 	DWORD pid;
@@ -67,15 +74,19 @@ LRESULT CALLBACK subclass_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam
 		if (LOWORD(wparam) == WA_INACTIVE)
 		{
 			wparam = MAKEWPARAM(WA_ACTIVE, HIWORD(wparam));
+			hook_note_call(g_id_wndproc);
 		}
 		break;
 	case WM_ACTIVATEAPP:
 		wparam = TRUE; // app is "still active"
+		hook_note_call(g_id_wndproc);
 		break;
 	case WM_NCACTIVATE:
 		wparam = TRUE; // keep the active (non-greyed) appearance
+		hook_note_call(g_id_wndproc);
 		break;
 	case WM_KILLFOCUS:
+		hook_note_call(g_id_wndproc);
 		return 0; // swallow: never tell the game it lost keyboard focus
 	default:
 		break;
@@ -86,6 +97,7 @@ LRESULT CALLBACK subclass_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam
 
 HWND WINAPI hk_GetForegroundWindow()
 {
+	hook_note_call(g_id_foreground);
 	if (g_focus_ipc != nullptr)
 	{
 		g_focus_ipc->note_focus_query(FocusApi_Foreground);
@@ -95,6 +107,7 @@ HWND WINAPI hk_GetForegroundWindow()
 
 HWND WINAPI hk_GetActiveWindow()
 {
+	hook_note_call(g_id_active);
 	if (g_focus_ipc != nullptr)
 	{
 		g_focus_ipc->note_focus_query(FocusApi_Active);
@@ -104,6 +117,7 @@ HWND WINAPI hk_GetActiveWindow()
 
 HWND WINAPI hk_GetFocus()
 {
+	hook_note_call(g_id_focus);
 	if (g_focus_ipc != nullptr)
 	{
 		g_focus_ipc->note_focus_query(FocusApi_Focus);
@@ -111,11 +125,12 @@ HWND WINAPI hk_GetFocus()
 	return g_game_hwnd;
 }
 
-void hook_export(HMODULE module, const char* name, void* detour)
+void hook_export(HMODULE module, const char* name, void* detour, int registry_id)
 {
 	if (void* target = reinterpret_cast<void*>(GetProcAddress(module, name)))
 	{
 		g_focus_hooks.emplace_back(safetyhook::create_inline(target, detour));
+		hook_set_installed(registry_id, true);
 	}
 }
 
@@ -129,6 +144,11 @@ bool install_focus_spoof(IpcClient& ipc)
 		return true; // already active
 	}
 
+	g_id_foreground = hook_register("GetForegroundWindow", HookSubsys_Focus);
+	g_id_active = hook_register("GetActiveWindow", HookSubsys_Focus);
+	g_id_focus = hook_register("GetFocus", HookSubsys_Focus);
+	g_id_wndproc = hook_register("WndProc (deactivation guard)", HookSubsys_Focus);
+
 	HWND hwnd = find_main_window(GetCurrentProcessId());
 	if (hwnd == nullptr)
 	{
@@ -144,12 +164,14 @@ bool install_focus_spoof(IpcClient& ipc)
 	    ? SetWindowLongPtrW(hwnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(&subclass_proc))
 	    : SetWindowLongPtrA(hwnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(&subclass_proc));
 	g_orig_proc = reinterpret_cast<WNDPROC>(replaced);
+	hook_set_installed(g_id_wndproc, true);
 
 	if (HMODULE user32 = GetModuleHandleW(L"user32.dll"))
 	{
-		hook_export(user32, "GetForegroundWindow", reinterpret_cast<void*>(&hk_GetForegroundWindow));
-		hook_export(user32, "GetActiveWindow", reinterpret_cast<void*>(&hk_GetActiveWindow));
-		hook_export(user32, "GetFocus", reinterpret_cast<void*>(&hk_GetFocus));
+		hook_export(user32, "GetForegroundWindow", reinterpret_cast<void*>(&hk_GetForegroundWindow),
+		            g_id_foreground);
+		hook_export(user32, "GetActiveWindow", reinterpret_cast<void*>(&hk_GetActiveWindow), g_id_active);
+		hook_export(user32, "GetFocus", reinterpret_cast<void*>(&hk_GetFocus), g_id_focus);
 	}
 
 	ipc.mark_focus_spoof(true, reinterpret_cast<std::uint64_t>(hwnd));
@@ -204,6 +226,10 @@ void remove_focus_spoof()
 		}
 	}
 	g_focus_hooks.clear();
+	hook_set_installed(g_id_foreground, false);
+	hook_set_installed(g_id_active, false);
+	hook_set_installed(g_id_focus, false);
+	hook_set_installed(g_id_wndproc, false);
 	g_game_hwnd = nullptr;
 	g_orig_proc = nullptr;
 	g_focus_ipc = nullptr;

hook/src/hook_registry.cpp

@@ -0,0 +1,103 @@
+#include "hook_registry.hpp"
+
+#include <atomic>
+#include <cstring>
+#include <mutex>
+
+namespace coop::hook
+{
+
+namespace
+{
+
+struct Slot
+{
+	char name[40] = {};
+	std::atomic<std::uint32_t> subsystem{0};
+	std::atomic<std::uint32_t> installed{0};
+	std::atomic<std::uint64_t> calls{0};
+	std::atomic<std::uint32_t> used{0};
+};
+
+Slot g_slots[kMaxHookEntries];
+std::atomic<std::uint32_t> g_count{0}; // high-water mark of allocated slots
+std::mutex g_register_mutex;           // registration only (rare); calls are lock-free
+
+} // namespace
+
+int hook_register(const char* name, std::uint32_t subsystem)
+{
+	std::scoped_lock lock(g_register_mutex);
+	const std::uint32_t count = g_count.load(std::memory_order_relaxed);
+	for (std::uint32_t i = 0; i < count; ++i)
+	{
+		if (g_slots[i].used.load(std::memory_order_relaxed) && std::strcmp(g_slots[i].name, name) == 0)
+		{
+			return static_cast<int>(i); // already registered
+		}
+	}
+	if (count >= kMaxHookEntries)
+	{
+		return -1; // table full
+	}
+	Slot& s = g_slots[count];
+	std::strncpy(s.name, name, sizeof(s.name) - 1);
+	s.name[sizeof(s.name) - 1] = '\0';
+	s.subsystem.store(subsystem, std::memory_order_relaxed);
+	s.installed.store(0, std::memory_order_relaxed);
+	s.calls.store(0, std::memory_order_relaxed);
+	s.used.store(1, std::memory_order_release);
+	g_count.store(count + 1, std::memory_order_release);
+	return static_cast<int>(count);
+}
+
+void hook_set_installed(int id, bool installed)
+{
+	if (id >= 0 && id < static_cast<int>(kMaxHookEntries))
+	{
+		g_slots[id].installed.store(installed ? 1u : 0u, std::memory_order_relaxed);
+	}
+}
+
+void hook_note_call(int id)
+{
+	if (id >= 0 && id < static_cast<int>(kMaxHookEntries))
+	{
+		g_slots[id].calls.fetch_add(1, std::memory_order_relaxed);
+	}
+}
+
+void hook_publish(IpcClient& ipc)
+{
+	const std::uint32_t count = g_count.load(std::memory_order_acquire);
+	HookEntry entries[kMaxHookEntries];
+	std::uint32_t n = 0;
+	for (std::uint32_t i = 0; i < count && i < kMaxHookEntries; ++i)
+	{
+		if (!g_slots[i].used.load(std::memory_order_acquire))
+		{
+			continue;
+		}
+		HookEntry& e = entries[n];
+		std::memcpy(e.name, g_slots[i].name, sizeof(e.name));
+		e.subsystem = g_slots[i].subsystem.load(std::memory_order_relaxed);
+		e.installed = g_slots[i].installed.load(std::memory_order_relaxed);
+		e.calls = g_slots[i].calls.load(std::memory_order_relaxed);
+		++n;
+	}
+	ipc.publish_hook_entries(entries, n);
+}
+
+void hook_registry_reset()
+{
+	std::scoped_lock lock(g_register_mutex);
+	for (auto& s : g_slots)
+	{
+		s.used.store(0, std::memory_order_relaxed);
+		s.installed.store(0, std::memory_order_relaxed);
+		s.calls.store(0, std::memory_order_relaxed);
+	}
+	g_count.store(0, std::memory_order_release);
+}
+
+} // namespace coop::hook

hook/src/hook_registry.hpp

@@ -0,0 +1,32 @@
+// Process-wide registry of the individual hooks the DLL installs, with a call
+// counter per hook. Each hook module (XInput, focus, audio) registers its hooks
+// once and bumps the counter from its detour; the worker thread publishes the
+// table to the host over IPC for the Injection panel's hook list.
+#pragma once
+
+#include <cstdint>
+
+#include "coop/protocol.hpp"
+#include "ipc_client.hpp"
+
+namespace coop::hook
+{
+
+// Find-or-create a registry slot for `name` in `subsystem`; returns a stable id
+// (>= 0) used with the calls below, or -1 if the table is full. Idempotent: the
+// same name returns the same id, so install/remove cycles keep one slot.
+int hook_register(const char* name, std::uint32_t subsystem);
+
+// Mark a hook installed / removed (drives the "installed" column).
+void hook_set_installed(int id, bool installed);
+
+// Bump a hook's call counter. Cheap (relaxed atomic); safe on any thread.
+void hook_note_call(int id);
+
+// Snapshot the registry into the host's HookStatus back-channel.
+void hook_publish(IpcClient& ipc);
+
+// Forget everything (DLL detach).
+void hook_registry_reset();
+
+} // namespace coop::hook

hook/src/ipc_client.hpp

@@ -148,6 +148,26 @@ public:
 		}
 	}
 
+	// --- Hook registry -----------------------------------------------------
+
+	// Publish the installed-hooks table (name / subsystem / installed / calls).
+	void publish_hook_entries(const HookEntry* entries, std::uint32_t count)
+	{
+		if (block_ == nullptr)
+		{
+			return;
+		}
+		if (count > kMaxHookEntries)
+		{
+			count = kMaxHookEntries;
+		}
+		for (std::uint32_t i = 0; i < count; ++i)
+		{
+			block_->status.hook_entries[i] = entries[i];
+		}
+		block_->status.hook_entry_count = count;
+	}
+
 private:
 	SharedMemory shm_;
 	SharedBlock* block_ = nullptr;

hook/src/xinput_hook.cpp

@@ -9,6 +9,8 @@
 
 #include <safetyhook.hpp>
 
+#include "hook_registry.hpp"
+
 namespace coop::hook
 {
 
@@ -22,6 +24,13 @@ constexpr std::uint16_t kGuideButton = 0x0400;
 IpcClient* g_ipc = nullptr;
 std::vector<safetyhook::InlineHook> g_hooks;
 
+// Registry ids for the hook list (one per logical export; shared across the
+// xinput*.dll variants that may each export it).
+int g_id_getstate = -1;
+int g_id_getstateex = -1;
+int g_id_getcaps = -1;
+int g_id_setstate = -1;
+
 // Last good snapshot, so a momentary failed IPC read (host mid-write) doesn't
 // flicker the controller as disconnected inside the game.
 std::array<CoopPadState, kMaxPads> g_cache;
@@ -86,16 +95,19 @@ DWORD query_state(DWORD user_index, XINPUT_STATE* state, bool keep_guide)
 
 DWORD WINAPI hk_XInputGetState(DWORD user_index, XINPUT_STATE* state)
 {
+	hook_note_call(g_id_getstate);
 	return query_state(user_index, state, /*keep_guide=*/false);
 }
 
 DWORD WINAPI hk_XInputGetStateEx(DWORD user_index, XINPUT_STATE* state)
 {
+	hook_note_call(g_id_getstateex);
 	return query_state(user_index, state, /*keep_guide=*/true);
 }
 
 DWORD WINAPI hk_XInputGetCapabilities(DWORD user_index, DWORD /*flags*/, XINPUT_CAPABILITIES* caps)
 {
+	hook_note_call(g_id_getcaps);
 	if (caps == nullptr || user_index >= kMaxPads)
 	{
 		return ERROR_DEVICE_NOT_CONNECTED;
@@ -131,6 +143,7 @@ DWORD WINAPI hk_XInputGetCapabilities(DWORD user_index, DWORD /*flags*/, XINPUT_
 // phase; for now report success so the game's logic is happy.
 DWORD WINAPI hk_XInputSetState(DWORD user_index, XINPUT_VIBRATION* /*vibration*/)
 {
+	hook_note_call(g_id_setstate);
 	if (user_index >= kMaxPads || !g_cache[user_index].connected)
 	{
 		return ERROR_DEVICE_NOT_CONNECTED;
@@ -138,7 +151,7 @@ DWORD WINAPI hk_XInputSetState(DWORD user_index, XINPUT_VIBRATION* /*vibration*/
 	return ERROR_SUCCESS;
 }
 
-void hook_export(HMODULE module, const char* name, void* detour)
+void hook_export(HMODULE module, const char* name, void* detour, int registry_id)
 {
 	if (module == nullptr)
 	{
@@ -147,10 +160,11 @@ void hook_export(HMODULE module, const char* name, void* detour)
 	if (void* target = reinterpret_cast<void*>(GetProcAddress(module, name)))
 	{
 		g_hooks.emplace_back(safetyhook::create_inline(target, detour));
+		hook_set_installed(registry_id, true);
 	}
 }
 
-void hook_ordinal(HMODULE module, WORD ordinal, void* detour)
+void hook_ordinal(HMODULE module, WORD ordinal, void* detour, int registry_id)
 {
 	if (module == nullptr)
 	{
@@ -159,6 +173,7 @@ void hook_ordinal(HMODULE module, WORD ordinal, void* detour)
 	if (void* target = reinterpret_cast<void*>(GetProcAddress(module, MAKEINTRESOURCEA(ordinal))))
 	{
 		g_hooks.emplace_back(safetyhook::create_inline(target, detour));
+		hook_set_installed(registry_id, true);
 	}
 }
 
@@ -173,6 +188,11 @@ bool install_xinput_hooks(IpcClient& ipc)
 	g_ipc = &ipc;
 	refresh_cache();
 
+	g_id_getstate = hook_register("XInputGetState", HookSubsys_Input);
+	g_id_getstateex = hook_register("XInputGetStateEx (ord 100)", HookSubsys_Input);
+	g_id_getcaps = hook_register("XInputGetCapabilities", HookSubsys_Input);
+	g_id_setstate = hook_register("XInputSetState", HookSubsys_Input);
+
 	// A process generally loads exactly one of these, but hook every one that is
 	// present so we don't miss the one the game actually calls.
 	const wchar_t* modules[] = {L"xinput1_4.dll", L"xinput1_3.dll", L"xinput9_1_0.dll", L"xinputuap.dll"};
@@ -183,10 +203,11 @@ bool install_xinput_hooks(IpcClient& ipc)
 		{
 			continue;
 		}
-		hook_export(module, "XInputGetState", reinterpret_cast<void*>(&hk_XInputGetState));
-		hook_ordinal(module, 100, reinterpret_cast<void*>(&hk_XInputGetStateEx));
-		hook_export(module, "XInputGetCapabilities", reinterpret_cast<void*>(&hk_XInputGetCapabilities));
-		hook_export(module, "XInputSetState", reinterpret_cast<void*>(&hk_XInputSetState));
+		hook_export(module, "XInputGetState", reinterpret_cast<void*>(&hk_XInputGetState), g_id_getstate);
+		hook_ordinal(module, 100, reinterpret_cast<void*>(&hk_XInputGetStateEx), g_id_getstateex);
+		hook_export(module, "XInputGetCapabilities", reinterpret_cast<void*>(&hk_XInputGetCapabilities),
+		            g_id_getcaps);
+		hook_export(module, "XInputSetState", reinterpret_cast<void*>(&hk_XInputSetState), g_id_setstate);
 	}
 	if (!g_hooks.empty())
 	{
@@ -199,6 +220,10 @@ bool install_xinput_hooks(IpcClient& ipc)
 void remove_xinput_hooks()
 {
 	g_hooks.clear(); // InlineHook destructor restores the original bytes
+	hook_set_installed(g_id_getstate, false);
+	hook_set_installed(g_id_getstateex, false);
+	hook_set_installed(g_id_getcaps, false);
+	hook_set_installed(g_id_setstate, false);
 	g_ipc = nullptr;
 }
 

host/src/injection_panel.cpp

@@ -139,6 +139,67 @@ void InjectionPanel::publish(const std::array<PadInfo, kMaxPads>& pads)
 	server_.publish(synthetic);
 }
 
+void InjectionPanel::draw_hook_list(const HookStatusView& status)
+{
+	static const char* kSubsysName[] = {"Input", "Focus", "Audio"};
+
+	const std::uint32_t n = status.hook_entry_count < kMaxHookEntries ? status.hook_entry_count : kMaxHookEntries;
+	if (n == 0)
+	{
+		return;
+	}
+
+	if (!ImGui::CollapsingHeader("Installed hooks", ImGuiTreeNodeFlags_DefaultOpen))
+	{
+		return;
+	}
+	if (ImGui::BeginTable("hooks", 3, ImGuiTableFlags_Borders | ImGuiTableFlags_SizingStretchProp))
+	{
+		ImGui::TableSetupColumn("Hook");
+		ImGui::TableSetupColumn("On", ImGuiTableColumnFlags_WidthFixed);
+		ImGui::TableSetupColumn("Calls", ImGuiTableColumnFlags_WidthFixed);
+		ImGui::TableHeadersRow();
+
+		// Group rows by subsystem so related hooks sit together.
+		for (std::uint32_t sub = 0; sub < HookSubsys_Count; ++sub)
+		{
+			bool header_done = false;
+			for (std::uint32_t i = 0; i < n; ++i)
+			{
+				const HookEntry& e = status.hook_entries[i];
+				if (e.subsystem != sub)
+				{
+					continue;
+				}
+				if (!header_done)
+				{
+					ImGui::TableNextRow();
+					ImGui::TableNextColumn();
+					ImGui::TextDisabled("%s", kSubsysName[sub < 3 ? sub : 0]);
+					ImGui::TableNextColumn();
+					ImGui::TableNextColumn();
+					header_done = true;
+				}
+				ImGui::TableNextRow();
+				ImGui::TableNextColumn();
+				ImGui::TextUnformatted(e.name);
+				ImGui::TableNextColumn();
+				if (e.installed)
+				{
+					ImGui::TextColored(kGreen, "yes");
+				}
+				else
+				{
+					ImGui::TextDisabled("no");
+				}
+				ImGui::TableNextColumn();
+				ImGui::Text("%llu", static_cast<unsigned long long>(e.calls));
+			}
+		}
+		ImGui::EndTable();
+	}
+}
+
 void InjectionPanel::draw_hook_status(bool debug_details)
 {
 	if (!server_.running())
@@ -160,6 +221,8 @@ void InjectionPanel::draw_hook_status(bool debug_details)
 	                   status.focus_spoof ? "active" : "inactive");
 	ImGui::TextDisabled("Controller poll rates are in the Controllers panel.");
 
+	draw_hook_list(status);
+
 	if (!debug_details)
 	{
 		return; // everything below is diagnostic detail

host/src/injection_panel.hpp

@@ -45,6 +45,7 @@ public:
 private:
 	void refresh_processes();
 	void inject_selected();
+	void draw_hook_list(const HookStatusView& status);
 	void draw_hook_status(bool debug_details);
 
 	std::vector<ProcessEntry> processes_;

host/src/ipc/ipc_server.cpp

@@ -71,6 +71,11 @@ HookStatusView IpcServer::hook_status() const
 	{
 		view.audio_streams[i] = s.audio_streams[i];
 	}
+	view.hook_entry_count = s.hook_entry_count;
+	for (std::uint32_t i = 0; i < kMaxHookEntries; ++i)
+	{
+		view.hook_entries[i] = s.hook_entries[i];
+	}
 	return view;
 }
 

host/src/ipc/ipc_server.hpp

@@ -31,6 +31,10 @@ struct HookStatusView
 	// Audio render-hook diagnostics (for the Audio panel's stream-count view).
 	std::uint32_t audio_streams_seen = 0;
 	AudioStreamInfo audio_streams[kMaxAudioStreams] = {};
+
+	// Installed-hooks registry (for the Injection panel's hook list).
+	std::uint32_t hook_entry_count = 0;
+	HookEntry hook_entries[kMaxHookEntries] = {};
 };
 
 class IpcServer

tests/CMakeLists.txt

@@ -2,7 +2,8 @@
 # Reuses the hook's xinput_hook.cpp directly so it exercises the shipping code.
 add_executable(hook_selftest
 	hook_selftest.cpp
-	${CMAKE_SOURCE_DIR}/hook/src/xinput_hook.cpp)
+	${CMAKE_SOURCE_DIR}/hook/src/xinput_hook.cpp
+	${CMAKE_SOURCE_DIR}/hook/src/hook_registry.cpp)
 
 target_include_directories(hook_selftest PRIVATE ${CMAKE_SOURCE_DIR}/hook/src)
 
@@ -42,7 +43,8 @@ add_test(NAME audio_loopback_test COMMAND audio_loopback_test)
 add_executable(audio_hook_test
 	audio_hook_test.cpp
 	${CMAKE_SOURCE_DIR}/hook/src/audio_hook.cpp
-	${CMAKE_SOURCE_DIR}/hook/src/debug_log.cpp)
+	${CMAKE_SOURCE_DIR}/hook/src/debug_log.cpp
+	${CMAKE_SOURCE_DIR}/hook/src/hook_registry.cpp)
 
 target_include_directories(audio_hook_test PRIVATE ${CMAKE_SOURCE_DIR}/hook/src)
 

tools/audio_probe/main.cpp

@@ -233,6 +233,16 @@ int wmain(int argc, wchar_t** argv)
 		}
 	}
 
+	// Dump the hook registry so the installed-hooks list can be verified headless.
+	static const char* kSubsys[] = {"Input", "Focus", "Audio"};
+	std::printf("\nInstalled hooks (%u):\n", status.hook_entry_count);
+	for (std::uint32_t i = 0; i < status.hook_entry_count && i < coop::kMaxHookEntries; ++i)
+	{
+		const coop::HookEntry& e = status.hook_entries[i];
+		std::printf("  [%-5s] %-34s %s  calls=%llu\n", e.subsystem < 3 ? kSubsys[e.subsystem] : "?", e.name,
+		            e.installed ? "ON " : "off", static_cast<unsigned long long>(e.calls));
+	}
+
 	std::printf("\nDone. Leaving the hook loaded in the game.\n");
 	block->magic = 0; // invalidate so a late hook read won't trust stale data
 	return 0;