Devtools: Pause system

CMakeLists.txt

@@ -458,6 +458,8 @@ set(CORE src/core/aerolib/stubs.cpp
          src/core/platform.h
          src/core/signals.cpp
          src/core/signals.h
+         src/core/system.cpp
+         src/core/system.h
          src/core/tls.cpp
          src/core/tls.h
          src/core/virtual_memory.cpp

src/core/libraries/kernel/thread_management.cpp

@@ -17,6 +17,7 @@
 #include "core/libraries/kernel/threads/threads.h"
 #include "core/libraries/libs.h"
 #include "core/linker.h"
+#include "core/system.h"
 #include "core/tls.h"
 #ifdef _WIN64
 #include <windows.h>
@@ -988,6 +989,7 @@ static void cleanup_thread(void* arg) {
     }
     Core::SetTcbBase(nullptr);
     thread->is_almost_done = true;
+    Common::Singleton<SystemState>::Instance()->RemoveCurrentThreadFromGuestList();
 }
 
 static void* run_thread(void* arg) {
@@ -998,6 +1000,7 @@ static void* run_thread(void* arg) {
     g_pthread_self = thread;
     pthread_cleanup_push(cleanup_thread, thread);
     thread->is_started = true;
+    Common::Singleton<SystemState>::Instance()->AddCurrentThreadToGuestList();
     ret = linker->ExecuteGuest(thread->entry, thread->arg);
     pthread_cleanup_pop(1);
     return ret;

src/core/libraries/kernel/time_management.cpp

@@ -247,6 +247,17 @@ int PS4_SYSV_ABI sceKernelConvertLocaltimeToUtc(time_t param_1, int64_t param_2,
     return SCE_OK;
 }
 
+namespace Dev {
+u64& GetInitialPtc() {
+    return initial_ptc;
+}
+
+Common::NativeClock* GetClock() {
+    return clock.get();
+}
+
+} // namespace Dev
+
 void timeSymbolsRegister(Core::Loader::SymbolsResolver* sym) {
     clock = std::make_unique<Common::NativeClock>();
     initial_ptc = clock->GetUptime();

src/core/libraries/kernel/time_management.h

@@ -7,6 +7,10 @@
 
 #include "common/types.h"
 
+namespace Common {
+class NativeClock;
+}
+
 namespace Core::Loader {
 class SymbolsResolver;
 }
@@ -47,6 +51,12 @@ constexpr int ORBIS_CLOCK_EXT_DEBUG_NETWORK = 17;
 constexpr int ORBIS_CLOCK_EXT_AD_NETWORK = 18;
 constexpr int ORBIS_CLOCK_EXT_RAW_NETWORK = 19;
 
+namespace Dev {
+u64& GetInitialPtc();
+
+Common::NativeClock* GetClock();
+} // namespace Dev
+
 u64 PS4_SYSV_ABI sceKernelGetTscFrequency();
 u64 PS4_SYSV_ABI sceKernelGetProcessTime();
 u64 PS4_SYSV_ABI sceKernelGetProcessTimeCounter();

src/core/libraries/system/msgdialog_ui.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <thread>
+#include <utility>
 
 #include <imgui.h>
 #include "common/assert.h"
@@ -281,10 +282,15 @@ void MsgDialogUi::Draw() {
     first_render = false;
 }
 
-DialogResult Libraries::MsgDialog::ShowMsgDialog(MsgDialogState state, bool block) {
-    DialogResult result{};
-    Status status = Status::RUNNING;
-    MsgDialogUi dialog(&state, &status, &result);
+DialogResult Libraries::MsgDialog::ShowMsgDialog(MsgDialogState p_state, bool block) {
+    static DialogResult result{};
+    static Status status;
+    static MsgDialogUi dialog;
+    static MsgDialogState state;
+    dialog = MsgDialogUi{};
+    status = Status::RUNNING;
+    state = std::move(p_state);
+    dialog = MsgDialogUi(&state, &status, &result);
     if (block) {
         while (status == Status::RUNNING) {
             std::this_thread::sleep_for(std::chrono::milliseconds(100));

src/core/libraries/videoout/driver.cpp

@@ -12,6 +12,7 @@
 #include "core/libraries/kernel/time_management.h"
 #include "core/libraries/videoout/driver.h"
 #include "core/platform.h"
+#include "core/system.h"
 #include "video_core/renderer_vulkan/renderer_vulkan.h"
 
 extern std::unique_ptr<Vulkan::RendererVulkan> renderer;
@@ -265,6 +266,8 @@ void VideoOutDriver::PresentThread(std::stop_token token) {
 
     Common::AccurateTimer timer{vblank_period};
 
+    auto systemState = Common::Singleton<SystemState>::Instance();
+
     const auto receive_request = [this] -> Request {
         std::scoped_lock lk{mutex};
         if (!requests.empty()) {
@@ -284,7 +287,7 @@ void VideoOutDriver::PresentThread(std::stop_token token) {
         if (vblank_status.count % (main_port.flip_rate + 1) == 0) {
             const auto request = receive_request();
             if (!request) {
-                if (!main_port.is_open) {
+                if (!main_port.is_open || systemState->IsGuestThreadsPaused()) {
                     DrawBlankFrame();
                 }
             } else {

src/core/linker.cpp

@@ -18,6 +18,7 @@
 #include "core/memory.h"
 #include "core/tls.h"
 #include "core/virtual_memory.h"
+#include "system.h"
 
 namespace Core {
 
@@ -88,6 +89,7 @@ void Linker::Execute() {
 
     // Init primary thread.
     Common::SetCurrentThreadName("GAME_MainThread");
+    Common::Singleton<SystemState>::Instance()->AddCurrentThreadToGuestList();
     Libraries::Kernel::pthreadInitSelfMainThread();
     EnsureThreadInitialized(true);
 

src/core/signals.cpp

@@ -83,6 +83,12 @@ static void SignalHandler(int sig, siginfo_t* info, void* raw_context) {
                             fmt::ptr(code_address), DisassembleInstruction(code_address));
         }
         break;
+    case SIGUSR1: { // Sleep thread until signal is received
+        sigset_t sigset;
+        sigemptyset(&sigset);
+        sigaddset(&sigset, SIGUSR1);
+        sigwait(&sigset, &sig);
+    } break;
     default:
         break;
     }
@@ -105,6 +111,8 @@ SignalDispatch::SignalDispatch() {
                "Failed to register access violation signal handler.");
     ASSERT_MSG(sigaction(SIGILL, &action, nullptr) == 0,
                "Failed to register illegal instruction signal handler.");
+    ASSERT_MSG(sigaction(SIGUSR1, &action, nullptr) == 0,
+               "Failed to register sleep signal handler.");
 #endif
 }
 

src/core/system.cpp

@@ -0,0 +1,71 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/assert.h"
+#include "common/native_clock.h"
+#include "libraries/kernel/event_queues.h"
+#include "libraries/kernel/time_management.h"
+#include "libraries/system/msgdialog.h"
+#include "system.h"
+
+void SystemState::AddCurrentThreadToGuestList() {
+    std::lock_guard lock{guest_threads_mutex};
+    ThreadID id;
+#ifdef _WIN32
+    id = GetCurrentThreadId();
+#else
+    id = pthread_self();
+#endif
+    guest_threads.push_back(id);
+}
+
+void SystemState::RemoveCurrentThreadFromGuestList() {
+    std::lock_guard lock{guest_threads_mutex};
+    ThreadID id;
+#ifdef _WIN32
+    id = GetCurrentThreadId();
+#else
+    id = pthread_self();
+#endif
+    std::erase_if(guest_threads, [&](const ThreadID& v) { return v == id; });
+}
+
+void SystemState::PauseGuestThreads() {
+    using namespace Libraries::MsgDialog;
+    std::lock_guard lock{guest_threads_mutex};
+    if (is_guest_threads_paused) {
+        return;
+    }
+
+    for (const auto& id : guest_threads) {
+#ifdef _WIN32
+        const HANDLE hd = OpenThread(THREAD_SUSPEND_RESUME, FALSE, id);
+        SuspendThread(hd);
+        CloseHandle(hd);
+#else
+        pthread_kill(id, SIGUSR1);
+#endif
+    }
+    pause_time = Libraries::Kernel::Dev::GetClock()->GetUptime();
+    is_guest_threads_paused = true;
+}
+
+void SystemState::ResumeGuestThreads() {
+    std::lock_guard lock{guest_threads_mutex};
+    if (!is_guest_threads_paused) {
+        return;
+    }
+
+    u64 delta_time = Libraries::Kernel::Dev::GetClock()->GetUptime() - pause_time;
+    Libraries::Kernel::Dev::GetInitialPtc() += delta_time;
+    for (const auto& id : guest_threads) {
+#ifdef _WIN32
+        const HANDLE hd = OpenThread(THREAD_SUSPEND_RESUME, FALSE, id);
+        ResumeThread(hd);
+        CloseHandle(hd);
+#else
+        pthread_kill(id, SIGUSR1);
+#endif
+    }
+    is_guest_threads_paused = false;
+}

src/core/system.h

@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <mutex>
+#include <vector>
+
+#ifdef _WIN32
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
+#include <Windows.h>
+using ThreadID = DWORD;
+#else
+#include <pthread.h>
+#include <signal.h>
+using ThreadID = pthread_t;
+#endif
+
+class SystemState {
+    std::mutex guest_threads_mutex{};
+    std::vector<ThreadID> guest_threads{};
+    bool is_guest_threads_paused = false;
+    u64 pause_time{};
+
+public:
+    void AddCurrentThreadToGuestList();
+
+    void RemoveCurrentThreadFromGuestList();
+
+    void PauseGuestThreads();
+
+    void ResumeGuestThreads();
+
+    inline bool IsGuestThreadsPaused() const {
+        return is_guest_threads_paused;
+    }
+};

src/imgui/layer/video_info.cpp

@@ -4,7 +4,9 @@
 #include <imgui.h>
 
 #include "common/config.h"
+#include "common/singleton.h"
 #include "common/types.h"
+#include "core/system.h"
 #include "imgui_internal.h"
 #include "video_info.h"
 
@@ -18,7 +20,11 @@ struct FrameInfo {
 static bool show = false;
 static bool show_advanced = false;
 
+static auto sysState = Common::Singleton<SystemState>::Instance();
 static u32 current_frame = 0;
+
+namespace FrameGraph {
+
 constexpr float TARGET_FPS = 60.0f;
 constexpr u32 FRAME_BUFFER_SIZE = 1024;
 constexpr float BAR_WIDTH_MULT = 1.4f;
@@ -27,78 +33,111 @@ constexpr float FRAME_GRAPH_PADDING_Y = 3.0f;
 static std::array<FrameInfo, FRAME_BUFFER_SIZE> frame_list;
 static float frame_graph_height = 50.0f;
 
+static void Draw() {
+    const auto& ctx = *GImGui;
+    const auto& window = *ctx.CurrentWindow;
+    auto& draw_list = *window.DrawList;
+
+    const float full_width = GetContentRegionAvail().x;
+    // Frame graph - inspired by
+    // https://asawicki.info/news_1758_an_idea_for_visualization_of_frame_times
+    auto pos = GetCursorScreenPos();
+    const ImVec2 size{full_width, frame_graph_height + FRAME_GRAPH_PADDING_Y * 2.0f};
+    ItemSize(size);
+    if (!ItemAdd({pos, pos + size}, GetID("FrameGraph"))) {
+        return;
+    }
+
+    float target_dt = 1.0f / (TARGET_FPS * (float)Config::vblankDiv());
+    float cur_pos_x = pos.x + full_width;
+    pos.y += FRAME_GRAPH_PADDING_Y;
+    const float final_pos_y = pos.y + frame_graph_height;
+
+    draw_list.AddRectFilled({pos.x, pos.y - FRAME_GRAPH_PADDING_Y},
+                            {pos.x + full_width, final_pos_y + FRAME_GRAPH_PADDING_Y},
+                            IM_COL32(0x33, 0x33, 0x33, 0xFF));
+    draw_list.PushClipRect({pos.x, pos.y}, {pos.x + full_width, final_pos_y}, true);
+    for (u32 i = 0; i < FRAME_BUFFER_SIZE; ++i) {
+        const auto& frame_info = frame_list[(current_frame - i) % FRAME_BUFFER_SIZE];
+        const float dt_factor = target_dt / frame_info.delta;
+
+        const float width = std::ceil(BAR_WIDTH_MULT / dt_factor);
+        const float height =
+            std::min(std::log2(BAR_HEIGHT_MULT / dt_factor) / 3.0f, 1.0f) * frame_graph_height;
+
+        ImU32 color;
+        if (dt_factor >= 0.95f) { // BLUE
+            color = IM_COL32(0x33, 0x33, 0xFF, 0xFF);
+        } else if (dt_factor >= 0.5f) { // GREEN <> YELLOW
+            float t = 1.0f - (dt_factor - 0.5f) * 2.0f;
+            int r = (int)(0xFF * t);
+            color = IM_COL32(r, 0xFF, 0, 0xFF);
+        } else { // YELLOW <> RED
+            float t = dt_factor * 2.0f;
+            int g = (int)(0xFF * t);
+            color = IM_COL32(0xFF, g, 0, 0xFF);
+        }
+        draw_list.AddRectFilled({cur_pos_x - width, final_pos_y - height}, {cur_pos_x, final_pos_y},
+                                color);
+        cur_pos_x -= width;
+        if (cur_pos_x < width) {
+            break;
+        }
+    }
+    draw_list.PopClipRect();
+}
+
+} // namespace FrameGraph
+
 static void DrawSimple() {
     const auto io = GetIO();
     Text("FPS: %.1f (%.3f ms)", io.Framerate, 1000.0f / io.Framerate);
 }
 
 static void DrawAdvanced() {
-    const auto& ctx = *GetCurrentContext();
+    const auto& ctx = *GImGui;
     const auto& io = ctx.IO;
     const auto& window = *ctx.CurrentWindow;
     auto& draw_list = *window.DrawList;
 
-    Text("Frame time: %.3f ms (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
+    auto isSystemPaused = sysState->IsGuestThreadsPaused();
+
+    static float deltaTime;
+    static float frameRate;
+
+    if (!isSystemPaused) {
+        deltaTime = io.DeltaTime * 1000.0f;
+        frameRate = io.Framerate;
+    }
+
+    Text("Frame time: %.3f ms (%.1f FPS)", deltaTime, frameRate);
 
     SeparatorText("Frame graph");
-    const float full_width = GetContentRegionAvail().x;
-    { // Frame graph - inspired by
-      // https://asawicki.info/news_1758_an_idea_for_visualization_of_frame_times
-        auto pos = GetCursorScreenPos();
-        const ImVec2 size{full_width, frame_graph_height + FRAME_GRAPH_PADDING_Y * 2.0f};
-        ItemSize(size);
-        if (!ItemAdd({pos, pos + size}, GetID("FrameGraph"))) {
-            return;
-        }
-
-        float target_dt = 1.0f / (TARGET_FPS * (float)Config::vblankDiv());
-        float cur_pos_x = pos.x + full_width;
-        pos.y += FRAME_GRAPH_PADDING_Y;
-        const float final_pos_y = pos.y + frame_graph_height;
-
-        draw_list.AddRectFilled({pos.x, pos.y - FRAME_GRAPH_PADDING_Y},
-                                {pos.x + full_width, final_pos_y + FRAME_GRAPH_PADDING_Y},
-                                IM_COL32(0x33, 0x33, 0x33, 0xFF));
-        draw_list.PushClipRect({pos.x, pos.y}, {pos.x + full_width, final_pos_y}, true);
-        for (u32 i = 0; i < FRAME_BUFFER_SIZE; ++i) {
-            const auto& frame_info = frame_list[(current_frame - i) % FRAME_BUFFER_SIZE];
-            const float dt_factor = target_dt / frame_info.delta;
-
-            const float width = std::ceil(BAR_WIDTH_MULT / dt_factor);
-            const float height =
-                std::min(std::log2(BAR_HEIGHT_MULT / dt_factor) / 3.0f, 1.0f) * frame_graph_height;
-
-            ImU32 color;
-            if (dt_factor >= 0.95f) { // BLUE
-                color = IM_COL32(0x33, 0x33, 0xFF, 0xFF);
-            } else if (dt_factor >= 0.5f) { // GREEN <> YELLOW
-                float t = 1.0f - (dt_factor - 0.5f) * 2.0f;
-                int r = (int)(0xFF * t);
-                color = IM_COL32(r, 0xFF, 0, 0xFF);
-            } else { // YELLOW <> RED
-                float t = dt_factor * 2.0f;
-                int g = (int)(0xFF * t);
-                color = IM_COL32(0xFF, g, 0, 0xFF);
-            }
-            draw_list.AddRectFilled({cur_pos_x - width, final_pos_y - height},
-                                    {cur_pos_x, final_pos_y}, color);
-            cur_pos_x -= width;
-            if (cur_pos_x < width) {
-                break;
-            }
-        }
-        draw_list.PopClipRect();
+    FrameGraph::Draw();
+    SeparatorText("System debug");
+    BeginDisabled(isSystemPaused);
+    if (Button("Pause")) {
+        sysState->PauseGuestThreads();
     }
+    EndDisabled();
+    SameLine();
+    BeginDisabled(!isSystemPaused);
+    if (Button("Resume")) {
+        sysState->ResumeGuestThreads();
+    }
+    EndDisabled();
 }
 
 void Layers::VideoInfo::Draw() {
     const auto io = GetIO();
 
-    const FrameInfo frame_info{
-        .num = ++current_frame,
-        .delta = io.DeltaTime,
-    };
-    frame_list[current_frame % FRAME_BUFFER_SIZE] = frame_info;
+    if (!sysState->IsGuestThreadsPaused()) {
+        const FrameInfo frame_info{
+            .num = ++current_frame,
+            .delta = io.DeltaTime,
+        };
+        FrameGraph::frame_list[current_frame % FrameGraph::FRAME_BUFFER_SIZE] = frame_info;
+    }
 
     if (IsKeyPressed(ImGuiKey_F10, false)) {
         const bool changed_ctrl = io.KeyCtrl != show_advanced;
@@ -108,11 +147,13 @@ void Layers::VideoInfo::Draw() {
 
     if (show) {
         if (show_advanced) {
-            if (Begin("Video Debug Info", nullptr, ImGuiWindowFlags_NoDecoration)) {
+            if (Begin("Video Debug Info", &show, 0)) {
                 DrawAdvanced();
             }
         } else {
-            if (Begin("Video Info", nullptr, ImGuiWindowFlags_NoDecoration)) {
+            if (Begin("Video Info", nullptr,
+                      ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoDecoration |
+                          ImGuiWindowFlags_AlwaysAutoResize)) {
                 DrawSimple();
             }
         }