threads: initialize tls on thread creation (take 2) (#4070)

roamic · web-flow · commit e1ecd8e98c12 · 2026-02-24T20:35:05.000+03:00
diff --git a/src/core/libraries/avplayer/avplayer_impl.cpp b/src/core/libraries/avplayer/avplayer_impl.cpp
@@ -12,28 +12,28 @@ void* PS4_SYSV_ABI AvPlayer::Allocate(void* handle, u32 alignment, u32 size) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto allocate = self->m_init_data_original.memory_replacement.allocate;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return Core::ExecuteGuest(allocate, ptr, alignment, size);
+    return allocate(ptr, alignment, size);
 }
 
 void PS4_SYSV_ABI AvPlayer::Deallocate(void* handle, void* memory) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto deallocate = self->m_init_data_original.memory_replacement.deallocate;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return Core::ExecuteGuest(deallocate, ptr, memory);
+    return deallocate(ptr, memory);
 }
 
 void* PS4_SYSV_ABI AvPlayer::AllocateTexture(void* handle, u32 alignment, u32 size) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto allocate = self->m_init_data_original.memory_replacement.allocate_texture;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return Core::ExecuteGuest(allocate, ptr, alignment, size);
+    return allocate(ptr, alignment, size);
 }
 
 void PS4_SYSV_ABI AvPlayer::DeallocateTexture(void* handle, void* memory) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto deallocate = self->m_init_data_original.memory_replacement.deallocate_texture;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return Core::ExecuteGuest(deallocate, ptr, memory);
+    return deallocate(ptr, memory);
 }
 
 int PS4_SYSV_ABI AvPlayer::OpenFile(void* handle, const char* filename) {
@@ -42,7 +42,7 @@ int PS4_SYSV_ABI AvPlayer::OpenFile(void* handle, const char* filename) {
 
     const auto open = self->m_init_data_original.file_replacement.open;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return Core::ExecuteGuest(open, ptr, filename);
+    return open(ptr, filename);
 }
 
 int PS4_SYSV_ABI AvPlayer::CloseFile(void* handle) {
@@ -51,7 +51,7 @@ int PS4_SYSV_ABI AvPlayer::CloseFile(void* handle) {
 
     const auto close = self->m_init_data_original.file_replacement.close;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return Core::ExecuteGuest(close, ptr);
+    return close(ptr);
 }
 
 int PS4_SYSV_ABI AvPlayer::ReadOffsetFile(void* handle, u8* buffer, u64 position, u32 length) {
@@ -60,7 +60,7 @@ int PS4_SYSV_ABI AvPlayer::ReadOffsetFile(void* handle, u8* buffer, u64 position
 
     const auto read_offset = self->m_init_data_original.file_replacement.read_offset;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return Core::ExecuteGuest(read_offset, ptr, buffer, position, length);
+    return read_offset(ptr, buffer, position, length);
 }
 
 u64 PS4_SYSV_ABI AvPlayer::SizeFile(void* handle) {
@@ -69,7 +69,7 @@ u64 PS4_SYSV_ABI AvPlayer::SizeFile(void* handle) {
 
     const auto size = self->m_init_data_original.file_replacement.size;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return Core::ExecuteGuest(size, ptr);
+    return size(ptr);
 }
 
 AvPlayerInitData AvPlayer::StubInitData(const AvPlayerInitData& data) {
diff --git a/src/core/libraries/avplayer/avplayer_state.cpp b/src/core/libraries/avplayer/avplayer_state.cpp
@@ -92,7 +92,7 @@ void AvPlayerState::DefaultEventCallback(void* opaque, AvPlayerEvents event_id,
     const auto callback = self->m_event_replacement.event_callback;
     const auto ptr = self->m_event_replacement.object_ptr;
     if (callback != nullptr) {
-        Core::ExecuteGuest(callback, ptr, event_id, 0, event_data);
+        callback(ptr, event_id, 0, event_data);
     }
 }
 
diff --git a/src/core/libraries/ime/ime.cpp b/src/core/libraries/ime/ime.cpp
@@ -99,16 +99,16 @@ class ImeHandler {
         if (m_ime_mode) {
             OrbisImeParam param = m_param.ime;
             if (use_param_handler) {
-                Core::ExecuteGuest(param.handler, param.arg, event);
+                param.handler(param.arg, event);
             } else {
-                Core::ExecuteGuest(handler, param.arg, event);
+                handler(param.arg, event);
             }
         } else {
             OrbisImeKeyboardParam param = m_param.key;
             if (use_param_handler) {
-                Core::ExecuteGuest(param.handler, param.arg, event);
+                param.handler(param.arg, event);
             } else {
-                Core::ExecuteGuest(handler, param.arg, event);
+                handler(param.arg, event);
             }
         }
     }
diff --git a/src/core/libraries/ime/ime_dialog_ui.cpp b/src/core/libraries/ime/ime_dialog_ui.cpp
@@ -131,8 +131,7 @@ bool ImeDialogState::CallTextFilter() {
         return false;
     }
 
-    int ret =
-        Core::ExecuteGuest(text_filter, out_text, &out_text_length, src_text, src_text_length);
+    int ret = text_filter(out_text, &out_text_length, src_text, src_text_length);
 
     if (ret != 0) {
         return false;
@@ -153,7 +152,7 @@ bool ImeDialogState::CallKeyboardFilter(const OrbisImeKeycode* src_keycode, u16*
         return true;
     }
 
-    int ret = Core::ExecuteGuest(keyboard_filter, src_keycode, out_keycode, out_status, nullptr);
+    int ret = keyboard_filter(src_keycode, out_keycode, out_status, nullptr);
     return ret == 0;
 }
 
diff --git a/src/core/libraries/kernel/threads.cpp b/src/core/libraries/kernel/threads.cpp
@@ -7,6 +7,17 @@
 
 namespace Libraries::Kernel {
 
+void PS4_SYSV_ABI ClearStack() {
+    void* const stackaddr_attr = Libraries::Kernel::g_curthread->attr.stackaddr_attr;
+    void* volatile sp;
+    asm("mov %%rsp, %0" : "=rm"(sp));
+    // leave a safety net of 64 bytes for memset
+    const size_t size = ((uintptr_t)sp - (uintptr_t)stackaddr_attr) - 64;
+    void* volatile buf = alloca(size);
+    memset(buf, 0, size);
+    sp = nullptr;
+}
+
 void RegisterThreads(Core::Loader::SymbolsResolver* sym) {
     RegisterMutex(sym);
     RegisterCond(sym);
diff --git a/src/core/libraries/kernel/threads.h b/src/core/libraries/kernel/threads.h
@@ -27,6 +27,7 @@ int PS4_SYSV_ABI posix_pthread_create(PthreadT* thread, const PthreadAttrT* attr
                                       PthreadEntryFunc start_routine, void* arg);
 
 int PS4_SYSV_ABI posix_pthread_join(PthreadT pthread, void** thread_return);
+int PS4_SYSV_ABI posix_pthread_detach(PthreadT pthread);
 
 int PS4_SYSV_ABI posix_pthread_mutexattr_init(PthreadMutexAttrT* attr);
 int PS4_SYSV_ABI posix_pthread_mutexattr_settype(PthreadMutexAttrT* attr, PthreadMutexType type);
@@ -40,6 +41,8 @@ int PS4_SYSV_ABI posix_pthread_mutex_destroy(PthreadMutexT* mutex);
 
 void RegisterThreads(Core::Loader::SymbolsResolver* sym);
 
+void PS4_SYSV_ABI ClearStack();
+
 class Thread {
 public:
     explicit Thread() = default;
diff --git a/src/core/libraries/kernel/threads/exception.cpp b/src/core/libraries/kernel/threads/exception.cpp
@@ -317,7 +317,7 @@ int PS4_SYSV_ABI sceKernelRaiseException(PthreadT thread, int signum) {
 
     u64 res = NtQueueApcThreadEx(reinterpret_cast<HANDLE>(thread->native_thr.GetHandle()), option,
                                  ExceptionHandler, (void*)thread->name.c_str(),
-                                 (void*)native_signum, nullptr);
+                                 (void*)(s64)native_signum, nullptr);
     ASSERT(res == 0);
 #endif
     return ORBIS_OK;
diff --git a/src/core/libraries/kernel/threads/pthread.cpp b/src/core/libraries/kernel/threads/pthread.cpp
@@ -199,10 +199,17 @@ static void RunThread(void* arg) {
     g_curthread = curthread;
     Common::SetCurrentThreadName(curthread->name.c_str());
     DebugState.AddCurrentThreadToGuestList();
+    Core::InitializeTLS();
 
-    /* Run the current thread's start routine with argument: */
     curthread->native_thr.Initialize();
-    void* ret = Core::ExecuteGuest(curthread->start_routine, curthread->arg);
+
+    // Clear the stack before running the guest thread
+    if (False(g_curthread->attr.flags & PthreadAttrFlags::StackUser)) {
+        ClearStack();
+    }
+
+    /* Run the current thread's start routine with argument: */
+    void* ret = curthread->start_routine(curthread->arg);
 
     /* Remove thread from tracking */
     DebugState.RemoveCurrentThreadFromGuestList();
diff --git a/src/core/libraries/kernel/threads/pthread_spec.cpp b/src/core/libraries/kernel/threads/pthread_spec.cpp
@@ -84,7 +84,7 @@ void _thread_cleanupspecific() {
                  * destructor:
                  */
                 lk.unlock();
-                Core::ExecuteGuest(destructor, data);
+                destructor(data);
                 lk.lock();
             }
         }
diff --git a/src/core/libraries/network/net_ctl_obj.cpp b/src/core/libraries/network/net_ctl_obj.cpp
@@ -50,7 +50,7 @@ void NetCtlInternal::CheckCallback() {
                                                          : ORBIS_NET_CTL_EVENT_TYPE_DISCONNECTED;
     for (const auto [func, arg] : callbacks) {
         if (func != nullptr) {
-            Core::ExecuteGuest(func, event, arg);
+            func(event, arg);
         }
     }
 }
@@ -61,7 +61,7 @@ void NetCtlInternal::CheckNpToolkitCallback() {
                                                          : ORBIS_NET_CTL_EVENT_TYPE_DISCONNECTED;
     for (const auto [func, arg] : nptool_callbacks) {
         if (func != nullptr) {
-            Core::ExecuteGuest(func, event, arg);
+            func(event, arg);
         }
     }
 }
diff --git a/src/core/libraries/ngs2/ngs2.cpp b/src/core/libraries/ngs2/ngs2.cpp
@@ -160,13 +160,13 @@ s32 PS4_SYSV_ABI sceNgs2SystemCreateWithAllocator(const OrbisNgs2SystemOption* o
             result = SystemSetup(option, &bufferInfo, 0, 0);
             if (result >= 0) {
                 uintptr_t sysUserData = allocator->userData;
-                result = Core::ExecuteGuest(hostAlloc, &bufferInfo);
+                result = hostAlloc(&bufferInfo);
                 if (result >= 0) {
                     OrbisNgs2Handle* handleCopy = outHandle;
                     result = SystemSetup(option, &bufferInfo, hostFree, handleCopy);
                     if (result < 0) {
                         if (hostFree) {
-                            Core::ExecuteGuest(hostFree, &bufferInfo);
+                            hostFree(&bufferInfo);
                         }
                     }
                 }
diff --git a/src/core/libraries/usbd/emulated/dimensions.cpp b/src/core/libraries/usbd/emulated/dimensions.cpp
@@ -3,6 +3,9 @@
 
 #include "dimensions.h"
 
+#include "core/libraries/kernel/threads.h"
+#include "core/tls.h"
+
 #include <mutex>
 #include <thread>
 
@@ -619,22 +622,46 @@ libusb_transfer_status DimensionsBackend::HandleAsyncTransfer(libusb_transfer* t
     return LIBUSB_TRANSFER_COMPLETED;
 }
 
+struct WriteThreadArgs {
+    DimensionsBackend* self;
+    libusb_transfer* transfer;
+};
+
+void* PS4_SYSV_ABI DimensionsBackend::WriteThread(void* arg) {
+    auto* args = reinterpret_cast<WriteThreadArgs*>(arg);
+
+    auto* self = args->self;
+    auto* transfer = args->transfer;
+
+    self->HandleAsyncTransfer(transfer);
+
+    const u8 flags = transfer->flags;
+    transfer->status = LIBUSB_TRANSFER_COMPLETED;
+    transfer->actual_length = transfer->length;
+    if (transfer->callback) {
+        transfer->callback(transfer);
+    }
+    if (flags & LIBUSB_TRANSFER_FREE_TRANSFER) {
+        libusb_free_transfer(transfer);
+    }
+    delete args;
+    return nullptr;
+}
+
 s32 DimensionsBackend::SubmitTransfer(libusb_transfer* transfer) {
     if (transfer->endpoint == 0x01) {
-        std::thread write_thread([this, transfer] {
-            HandleAsyncTransfer(transfer);
-
-            const u8 flags = transfer->flags;
-            transfer->status = LIBUSB_TRANSFER_COMPLETED;
-            transfer->actual_length = transfer->length;
-            if (transfer->callback) {
-                transfer->callback(transfer);
-            }
-            if (flags & LIBUSB_TRANSFER_FREE_TRANSFER) {
-                libusb_free_transfer(transfer);
-            }
-        });
-        write_thread.detach();
+        using namespace Libraries::Kernel;
+
+        PthreadAttrT attr{};
+        posix_pthread_attr_init(&attr);
+        PthreadT thread{};
+        auto* args = new WriteThreadArgs();
+        args->self = this;
+        args->transfer = transfer;
+        posix_pthread_create(&thread, &attr, HOST_CALL(DimensionsBackend::WriteThread), args);
+        posix_pthread_attr_destroy(&attr);
+        posix_pthread_detach(thread);
+
         return LIBUSB_SUCCESS;
     }
 
diff --git a/src/core/libraries/usbd/emulated/dimensions.h b/src/core/libraries/usbd/emulated/dimensions.h
@@ -103,6 +103,8 @@ class DimensionsBackend final : public UsbEmulatedBackend {
     std::queue<std::array<u8, 32>> m_queries;
 
 private:
+    static void* PS4_SYSV_ABI WriteThread(void* arg);
+
     std::shared_ptr<DimensionsToypad> m_dimensions_toypad = std::make_shared<DimensionsToypad>();
 
     std::array<u8, 9> m_endpoint_out_extra = {0x09, 0x21, 0x11, 0x01, 0x00, 0x01, 0x22, 0x1d, 0x00};
diff --git a/src/core/linker.cpp b/src/core/linker.cpp
@@ -135,7 +135,8 @@ void Linker::Execute(const std::vector<std::string>& args) {
             }
         }
         params.entry_addr = module->GetEntryAddress();
-        ExecuteGuest(RunMainEntry, &params);
+        Libraries::Kernel::ClearStack();
+        RunMainEntry(&params);
     });
 }
 
@@ -379,8 +380,7 @@ void* Linker::TlsGetAddr(u64 module_index, u64 offset) {
     if (!addr) {
         // Module was just loaded by above code. Allocate TLS block for it.
         const u32 init_image_size = module->tls.init_image_size;
-        u8* dest = reinterpret_cast<u8*>(
-            Core::ExecuteGuest(heap_api->heap_malloc, module->tls.image_size));
+        u8* dest = reinterpret_cast<u8*>(heap_api->heap_malloc(module->tls.image_size));
         const u8* src = reinterpret_cast<const u8*>(module->tls.image_virtual_addr);
         std::memcpy(dest, src, init_image_size);
         std::memset(dest + init_image_size, 0, module->tls.image_size - init_image_size);
@@ -412,7 +412,7 @@ void* Linker::AllocateTlsForThread(bool is_primary) {
         ASSERT_MSG(ret == 0, "Unable to allocate TLS+TCB for the primary thread");
     } else {
         if (heap_api) {
-            addr_out = Core::ExecuteGuest(heap_api->heap_malloc, total_tls_size);
+            addr_out = heap_api->heap_malloc(total_tls_size);
         } else {
             addr_out = std::malloc(total_tls_size);
         }
@@ -422,7 +422,7 @@ void* Linker::AllocateTlsForThread(bool is_primary) {
 
 void Linker::FreeTlsForNonPrimaryThread(void* pointer) {
     if (heap_api) {
-        Core::ExecuteGuest(heap_api->heap_free, pointer);
+        heap_api->heap_free(pointer);
     } else {
         std::free(pointer);
     }
diff --git a/src/core/module.cpp b/src/core/module.cpp
@@ -97,7 +97,7 @@ Module::~Module() = default;
 s32 Module::Start(u64 args, const void* argp, void* param) {
     LOG_INFO(Core_Linker, "Module started : {}", name);
     const VAddr addr = dynamic_info.init_virtual_addr + GetBaseAddress();
-    return ExecuteGuest(reinterpret_cast<EntryFunc>(addr), args, argp, param);
+    return reinterpret_cast<EntryFunc>(addr)(args, argp, param);
 }
 
 void Module::LoadModuleToMemory(u32& max_tls_index) {
diff --git a/src/core/tls.cpp b/src/core/tls.cpp
@@ -198,7 +198,7 @@ Tcb* GetTcbBase() {
 
 thread_local std::once_flag init_tls_flag;
 
-void EnsureThreadInitialized() {
+void InitializeTLS() {
     std::call_once(init_tls_flag, [] { SetTcbBase(Libraries::Kernel::g_curthread->tcb); });
 }
 
diff --git a/src/core/tls.h b/src/core/tls.h
@@ -43,30 +43,7 @@ void SetTcbBase(void* image_address);
 Tcb* GetTcbBase();
 
 /// Makes sure TLS is initialized for the thread before entering guest.
-void EnsureThreadInitialized();
-
-template <size_t size>
-#ifdef __clang__
-__attribute__((optnone))
-#else
-__attribute__((optimize("O0")))
-#endif
-void ClearStack() {
-    volatile void* buf = alloca(size);
-    memset(const_cast<void*>(buf), 0, size);
-    buf = nullptr;
-}
-
-template <class ReturnType, class... FuncArgs, class... CallArgs>
-ReturnType ExecuteGuest(PS4_SYSV_ABI ReturnType (*func)(FuncArgs...), CallArgs&&... args) {
-    EnsureThreadInitialized();
-    // clear stack to avoid trash from EnsureThreadInitialized
-    auto* tcb = GetTcbBase();
-    if (tcb != nullptr && tcb->tcb_fiber == nullptr) {
-        ClearStack<12_KB>();
-    }
-    return func(std::forward<CallArgs>(args)...);
-}
+void InitializeTLS();
 
 template <class F, F f>
 struct HostCallWrapperImpl;

Original file line number	Diff line number	Diff line change
`@@ -92,7 +92,7 @@ void AvPlayerState::DefaultEventCallback(void* opaque, AvPlayerEvents event_id,`
`92`	`92`	`const auto callback = self->m_event_replacement.event_callback;`
`93`	`93`	`const auto ptr = self->m_event_replacement.object_ptr;`
`94`	`94`	`if (callback != nullptr) {`
`95`		`- Core::ExecuteGuest(callback, ptr, event_id, 0, event_data);`
	`95`	`+ callback(ptr, event_id, 0, event_data);`
`96`	`96`	`}`
`97`	`97`	`}`
`98`	`98`
Original file line number	Diff line number	Diff line change
`@@ -99,16 +99,16 @@ class ImeHandler {`
`99`	`99`	`if (m_ime_mode) {`
`100`	`100`	`OrbisImeParam param = m_param.ime;`
`101`	`101`	`if (use_param_handler) {`
`102`		`- Core::ExecuteGuest(param.handler, param.arg, event);`
	`102`	`+ param.handler(param.arg, event);`
`103`	`103`	`} else {`
`104`		`- Core::ExecuteGuest(handler, param.arg, event);`
	`104`	`+ handler(param.arg, event);`
`105`	`105`	`}`
`106`	`106`	`} else {`
`107`	`107`	`OrbisImeKeyboardParam param = m_param.key;`
`108`	`108`	`if (use_param_handler) {`
`109`		`- Core::ExecuteGuest(param.handler, param.arg, event);`
	`109`	`+ param.handler(param.arg, event);`
`110`	`110`	`} else {`
`111`		`- Core::ExecuteGuest(handler, param.arg, event);`
	`111`	`+ handler(param.arg, event);`
`112`	`112`	`}`
`113`	`113`	`}`
`114`	`114`	`}`
Original file line number	Diff line number	Diff line change
`@@ -131,8 +131,7 @@ bool ImeDialogState::CallTextFilter() {`
`131`	`131`	`return false;`
`132`	`132`	`}`
`133`	`133`
`134`		`- int ret =`
`135`		`- Core::ExecuteGuest(text_filter, out_text, &out_text_length, src_text, src_text_length);`
	`134`	`+ int ret = text_filter(out_text, &out_text_length, src_text, src_text_length);`
`136`	`135`
`137`	`136`	`if (ret != 0) {`
`138`	`137`	`return false;`
`@@ -153,7 +152,7 @@ bool ImeDialogState::CallKeyboardFilter(const OrbisImeKeycode* src_keycode, u16*`
`153`	`152`	`return true;`
`154`	`153`	`}`
`155`	`154`
`156`		`- int ret = Core::ExecuteGuest(keyboard_filter, src_keycode, out_keycode, out_status, nullptr);`
	`155`	`+ int ret = keyboard_filter(src_keycode, out_keycode, out_status, nullptr);`
`157`	`156`	`return ret == 0;`
`158`	`157`	`}`
`159`	`158`
Original file line number	Diff line number	Diff line change
`@@ -84,7 +84,7 @@ void _thread_cleanupspecific() {`
`84`	`84`	`* destructor:`
`85`	`85`	`*/`
`86`	`86`	`lk.unlock();`
`87`		`- Core::ExecuteGuest(destructor, data);`
	`87`	`+ destructor(data);`
`88`	`88`	`lk.lock();`
`89`	`89`	`}`
`90`	`90`	`}`
Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,7 @@ void NetCtlInternal::CheckCallback() {`
`50`	`50`	`: ORBIS_NET_CTL_EVENT_TYPE_DISCONNECTED;`
`51`	`51`	`for (const auto [func, arg] : callbacks) {`
`52`	`52`	`if (func != nullptr) {`
`53`		`- Core::ExecuteGuest(func, event, arg);`
	`53`	`+ func(event, arg);`
`54`	`54`	`}`
`55`	`55`	`}`
`56`	`56`	`}`
`@@ -61,7 +61,7 @@ void NetCtlInternal::CheckNpToolkitCallback() {`
`61`	`61`	`: ORBIS_NET_CTL_EVENT_TYPE_DISCONNECTED;`
`62`	`62`	`for (const auto [func, arg] : nptool_callbacks) {`
`63`	`63`	`if (func != nullptr) {`
`64`		`- Core::ExecuteGuest(func, event, arg);`
	`64`	`+ func(event, arg);`
`65`	`65`	`}`
`66`	`66`	`}`
`67`	`67`	`}`