core: hle: kernel: k_process: Improve management of page table & cleanup.

src/core/hle/kernel/k_page_table.cpp

@@ -256,16 +256,21 @@ Result KPageTable::InitializeForProcess(FileSys::ProgramAddressSpaceType as_type
     m_mapped_physical_memory_size = 0;
     m_memory_pool = pool;
 
-    m_page_table_impl.Resize(m_address_space_width, PageBits);
+    m_page_table_impl = std::make_unique<Common::PageTable>();
+    m_page_table_impl->Resize(m_address_space_width, PageBits);
 
     return m_memory_block_manager.Initialize(m_address_space_start, m_address_space_end,
                                              m_memory_block_slab_manager);
 }
 
 void KPageTable::Finalize() {
+    // Finalize memory blocks.
     m_memory_block_manager.Finalize(m_memory_block_slab_manager, [&](VAddr addr, u64 size) {
-        m_system.Memory().UnmapRegion(m_page_table_impl, addr, size);
+        m_system.Memory().UnmapRegion(*m_page_table_impl, addr, size);
     });
+
+    // Close the backing page table, as the destructor is not called for guest objects.
+    m_page_table_impl.reset();
 }
 
 Result KPageTable::MapProcessCode(VAddr addr, size_t num_pages, KMemoryState state,
@@ -514,7 +519,7 @@ Result KPageTable::MakePageGroup(KPageGroup& pg, VAddr addr, size_t num_pages) {
     // Begin traversal.
     Common::PageTable::TraversalContext context;
     Common::PageTable::TraversalEntry next_entry;
-    R_UNLESS(m_page_table_impl.BeginTraversal(next_entry, context, addr),
+    R_UNLESS(m_page_table_impl->BeginTraversal(next_entry, context, addr),
              ResultInvalidCurrentMemory);
 
     // Prepare tracking variables.
@@ -525,7 +530,7 @@ Result KPageTable::MakePageGroup(KPageGroup& pg, VAddr addr, size_t num_pages) {
     // Iterate, adding to group as we go.
     const auto& memory_layout = m_system.Kernel().MemoryLayout();
     while (tot_size < size) {
-        R_UNLESS(m_page_table_impl.ContinueTraversal(next_entry, context),
+        R_UNLESS(m_page_table_impl->ContinueTraversal(next_entry, context),
                  ResultInvalidCurrentMemory);
 
         if (next_entry.phys_addr != (cur_addr + cur_size)) {
@@ -588,7 +593,7 @@ bool KPageTable::IsValidPageGroup(const KPageGroup& pg_ll, VAddr addr, size_t nu
     // Begin traversal.
     Common::PageTable::TraversalContext context;
     Common::PageTable::TraversalEntry next_entry;
-    if (!m_page_table_impl.BeginTraversal(next_entry, context, addr)) {
+    if (!m_page_table_impl->BeginTraversal(next_entry, context, addr)) {
         return false;
     }
 
@@ -599,7 +604,7 @@ bool KPageTable::IsValidPageGroup(const KPageGroup& pg_ll, VAddr addr, size_t nu
 
     // Iterate, comparing expected to actual.
     while (tot_size < size) {
-        if (!m_page_table_impl.ContinueTraversal(next_entry, context)) {
+        if (!m_page_table_impl->ContinueTraversal(next_entry, context)) {
             return false;
         }
 
@@ -2042,7 +2047,7 @@ Result KPageTable::Operate(VAddr addr, size_t num_pages, const KPageGroup& page_
 
         switch (operation) {
         case OperationType::MapGroup:
-            m_system.Memory().MapMemoryRegion(m_page_table_impl, addr, size, node.GetAddress());
+            m_system.Memory().MapMemoryRegion(*m_page_table_impl, addr, size, node.GetAddress());
             break;
         default:
             ASSERT(false);
@@ -2064,12 +2069,12 @@ Result KPageTable::Operate(VAddr addr, size_t num_pages, KMemoryPermission perm,
 
     switch (operation) {
     case OperationType::Unmap:
-        m_system.Memory().UnmapRegion(m_page_table_impl, addr, num_pages * PageSize);
+        m_system.Memory().UnmapRegion(*m_page_table_impl, addr, num_pages * PageSize);
         break;
     case OperationType::Map: {
         ASSERT(map_addr);
         ASSERT(Common::IsAligned(map_addr, PageSize));
-        m_system.Memory().MapMemoryRegion(m_page_table_impl, addr, num_pages * PageSize, map_addr);
+        m_system.Memory().MapMemoryRegion(*m_page_table_impl, addr, num_pages * PageSize, map_addr);
         break;
     }
     case OperationType::ChangePermissions:

src/core/hle/kernel/k_page_table.h

@@ -88,11 +88,11 @@ public:
                                 KMemoryAttribute attr_mask, KMemoryAttribute attr);
 
     Common::PageTable& PageTableImpl() {
-        return m_page_table_impl;
+        return *m_page_table_impl;
     }
 
     const Common::PageTable& PageTableImpl() const {
-        return m_page_table_impl;
+        return *m_page_table_impl;
     }
 
     bool CanContain(VAddr addr, size_t size, KMemoryState state) const;
@@ -303,7 +303,7 @@ public:
         return IsKernel() ? 1 : 4;
     }
     PAddr GetPhysicalAddr(VAddr addr) const {
-        const auto backing_addr = m_page_table_impl.backing_addr[addr >> PageBits];
+        const auto backing_addr = m_page_table_impl->backing_addr[addr >> PageBits];
         ASSERT(backing_addr);
         return backing_addr + addr;
     }
@@ -365,7 +365,7 @@ private:
     KMemoryManager::Pool m_memory_pool{KMemoryManager::Pool::Application};
     KMemoryManager::Direction m_allocation_option{KMemoryManager::Direction::FromFront};
 
-    Common::PageTable m_page_table_impl;
+    std::unique_ptr<Common::PageTable> m_page_table_impl;
 
     Core::System& m_system;
 };

src/core/hle/kernel/k_process.cpp

@@ -72,6 +72,7 @@ Result KProcess::Initialize(KProcess* process, Core::System& system, std::string
 
     process->name = std::move(process_name);
     process->resource_limit = res_limit;
+    process->system_resource_address = 0;
     process->state = State::Created;
     process->program_id = 0;
     process->process_id = type == ProcessType::KernelInternal ? kernel.CreateNewKernelProcessID()
@@ -92,6 +93,7 @@ Result KProcess::Initialize(KProcess* process, Core::System& system, std::string
     process->exception_thread = nullptr;
     process->is_suspended = false;
     process->schedule_count = 0;
+    process->is_handle_table_initialized = false;
 
     // Open a reference to the resource limit.
     process->resource_limit->Open();
@@ -121,9 +123,9 @@ void KProcess::DecrementRunningThreadCount() {
     }
 }
 
-u64 KProcess::GetTotalPhysicalMemoryAvailable() const {
+u64 KProcess::GetTotalPhysicalMemoryAvailable() {
     const u64 capacity{resource_limit->GetFreeValue(LimitableResource::PhysicalMemory) +
-                       page_table->GetNormalMemorySize() + GetSystemResourceSize() + image_size +
+                       page_table.GetNormalMemorySize() + GetSystemResourceSize() + image_size +
                        main_thread_stack_size};
     if (const auto pool_size = kernel.MemoryManager().GetSize(KMemoryManager::Pool::Application);
         capacity != pool_size) {
@@ -135,16 +137,16 @@ u64 KProcess::GetTotalPhysicalMemoryAvailable() const {
     return memory_usage_capacity;
 }
 
-u64 KProcess::GetTotalPhysicalMemoryAvailableWithoutSystemResource() const {
+u64 KProcess::GetTotalPhysicalMemoryAvailableWithoutSystemResource() {
     return GetTotalPhysicalMemoryAvailable() - GetSystemResourceSize();
 }
 
-u64 KProcess::GetTotalPhysicalMemoryUsed() const {
+u64 KProcess::GetTotalPhysicalMemoryUsed() {
-    return image_size + main_thread_stack_size + page_table->GetNormalMemorySize() +
+    return image_size + main_thread_stack_size + page_table.GetNormalMemorySize() +
            GetSystemResourceSize();
 }
 
-u64 KProcess::GetTotalPhysicalMemoryUsedWithoutSystemResource() const {
+u64 KProcess::GetTotalPhysicalMemoryUsedWithoutSystemResource() {
     return GetTotalPhysicalMemoryUsed() - GetSystemResourceUsage();
 }
 
@@ -348,6 +350,9 @@ Result KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std:
     system_resource_size = metadata.GetSystemResourceSize();
     image_size = code_size;
 
+    // We currently do not support process-specific system resource
+    UNIMPLEMENTED_IF(system_resource_size != 0);
+
     KScopedResourceReservation memory_reservation(resource_limit, LimitableResource::PhysicalMemory,
                                                   code_size + system_resource_size);
     if (!memory_reservation.Succeeded()) {
@@ -356,7 +361,7 @@ Result KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std:
         return ResultLimitReached;
     }
     // Initialize proces address space
-    if (const Result result{page_table->InitializeForProcess(
+    if (const Result result{page_table.InitializeForProcess(
             metadata.GetAddressSpaceType(), false, 0x8000000, code_size,
             &kernel.GetApplicationMemoryBlockManager(), KMemoryManager::Pool::Application)};
         result.IsError()) {
@@ -364,7 +369,7 @@ Result KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std:
     }
 
     // Map process code region
-    if (const Result result{page_table->MapProcessCode(page_table->GetCodeRegionStart(),
+    if (const Result result{page_table.MapProcessCode(page_table.GetCodeRegionStart(),
                                                       code_size / PageSize, KMemoryState::Code,
                                                       KMemoryPermission::None)};
         result.IsError()) {
@@ -374,7 +379,7 @@ Result KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std:
     // Initialize process capabilities
     const auto& caps{metadata.GetKernelCapabilities()};
     if (const Result result{
-            capabilities.InitializeForUserProcess(caps.data(), caps.size(), *page_table)};
+            capabilities.InitializeForUserProcess(caps.data(), caps.size(), page_table)};
         result.IsError()) {
         return result;
     }
@@ -384,12 +389,12 @@ Result KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std:
     case FileSys::ProgramAddressSpaceType::Is32Bit:
     case FileSys::ProgramAddressSpaceType::Is36Bit:
     case FileSys::ProgramAddressSpaceType::Is39Bit:
-        memory_usage_capacity = page_table->GetHeapRegionEnd() - page_table->GetHeapRegionStart();
+        memory_usage_capacity = page_table.GetHeapRegionEnd() - page_table.GetHeapRegionStart();
         break;
 
     case FileSys::ProgramAddressSpaceType::Is32BitNoMap:
-        memory_usage_capacity = page_table->GetHeapRegionEnd() - page_table->GetHeapRegionStart() +
+        memory_usage_capacity = page_table.GetHeapRegionEnd() - page_table.GetHeapRegionStart() +
-                                page_table->GetAliasRegionEnd() - page_table->GetAliasRegionStart();
+                                page_table.GetAliasRegionEnd() - page_table.GetAliasRegionStart();
         break;
 
     default:
@@ -397,7 +402,7 @@ Result KProcess::LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std:
     }
 
     // Create TLS region
-    R_TRY(this->CreateThreadLocalRegion(std::addressof(tls_region_address)));
+    R_TRY(this->CreateThreadLocalRegion(std::addressof(plr_address)));
     memory_reservation.Commit();
 
     return handle_table.Initialize(capabilities.GetHandleTableSize());
@@ -409,7 +414,7 @@ void KProcess::Run(s32 main_thread_priority, u64 stack_size) {
     resource_limit->Reserve(LimitableResource::PhysicalMemory, main_thread_stack_size);
 
     const std::size_t heap_capacity{memory_usage_capacity - (main_thread_stack_size + image_size)};
-    ASSERT(!page_table->SetMaxHeapSize(heap_capacity).IsError());
+    ASSERT(!page_table.SetMaxHeapSize(heap_capacity).IsError());
 
     ChangeState(State::Running);
 
@@ -437,8 +442,8 @@ void KProcess::PrepareForTermination() {
 
     stop_threads(kernel.System().GlobalSchedulerContext().GetThreadList());
 
-    this->DeleteThreadLocalRegion(tls_region_address);
+    this->DeleteThreadLocalRegion(plr_address);
-    tls_region_address = 0;
+    plr_address = 0;
 
     if (resource_limit) {
         resource_limit->Release(LimitableResource::PhysicalMemory,
@@ -474,7 +479,7 @@ void KProcess::Finalize() {
     }
 
     // Finalize the page table.
-    page_table.reset();
+    page_table.Finalize();
 
     // Perform inherited finalization.
     KAutoObjectWithSlabHeapAndContainer<KProcess, KWorkerTask>::Finalize();
@@ -628,7 +633,7 @@ bool KProcess::RemoveWatchpoint(Core::System& system, VAddr addr, u64 size,
 void KProcess::LoadModule(CodeSet code_set, VAddr base_addr) {
     const auto ReprotectSegment = [&](const CodeSet::Segment& segment,
                                       Svc::MemoryPermission permission) {
-        page_table->SetProcessMemoryPermission(segment.addr + base_addr, segment.size, permission);
+        page_table.SetProcessMemoryPermission(segment.addr + base_addr, segment.size, permission);
     };
 
     kernel.System().Memory().WriteBlock(*this, base_addr, code_set.memory.data(),
@@ -645,8 +650,7 @@ bool KProcess::IsSignaled() const {
 }
 
 KProcess::KProcess(KernelCore& kernel_)
-    : KAutoObjectWithSlabHeapAndContainer{kernel_}, page_table{std::make_unique<KPageTable>(
+    : KAutoObjectWithSlabHeapAndContainer{kernel_}, page_table{kernel_.System()},
-                                                        kernel_.System())},
       handle_table{kernel_}, address_arbiter{kernel_.System()}, condition_var{kernel_.System()},
       state_lock{kernel_}, list_lock{kernel_} {}
 
@@ -668,11 +672,11 @@ Result KProcess::AllocateMainThreadStack(std::size_t stack_size) {
     // The kernel always ensures that the given stack size is page aligned.
     main_thread_stack_size = Common::AlignUp(stack_size, PageSize);
 
-    const VAddr start{page_table->GetStackRegionStart()};
+    const VAddr start{page_table.GetStackRegionStart()};
-    const std::size_t size{page_table->GetStackRegionEnd() - start};
+    const std::size_t size{page_table.GetStackRegionEnd() - start};
 
     CASCADE_RESULT(main_thread_stack_top,
-                   page_table->AllocateAndMapMemory(
+                   page_table.AllocateAndMapMemory(
                        main_thread_stack_size / PageSize, PageSize, false, start, size / PageSize,
                        KMemoryState::Stack, KMemoryPermission::UserReadWrite));
 
@@ -681,4 +685,12 @@ Result KProcess::AllocateMainThreadStack(std::size_t stack_size) {
     return ResultSuccess;
 }
 
+void KProcess::FinalizeHandleTable() {
+    // Finalize the table.
+    handle_table.Finalize();
+
+    // Note that the table is finalized.
+    is_handle_table_initialized = false;
+}
+
 } // namespace Kernel

src/core/hle/kernel/k_process.h

@@ -13,6 +13,7 @@
 #include "core/hle/kernel/k_auto_object.h"
 #include "core/hle/kernel/k_condition_variable.h"
 #include "core/hle/kernel/k_handle_table.h"
+#include "core/hle/kernel/k_page_table.h"
 #include "core/hle/kernel/k_synchronization_object.h"
 #include "core/hle/kernel/k_thread_local_page.h"
 #include "core/hle/kernel/k_worker_task.h"
@@ -31,7 +32,6 @@ class ProgramMetadata;
 namespace Kernel {
 
 class KernelCore;
-class KPageTable;
 class KResourceLimit;
 class KThread;
 class KSharedMemoryInfo;
@@ -107,12 +107,12 @@ public:
 
     /// Gets a reference to the process' page table.
     KPageTable& PageTable() {
-        return *page_table;
+        return page_table;
     }
 
     /// Gets const a reference to the process' page table.
     const KPageTable& PageTable() const {
-        return *page_table;
+        return page_table;
     }
 
     /// Gets a reference to the process' handle table.
@@ -150,9 +150,8 @@ public:
         return address_arbiter.WaitForAddress(address, arb_type, value, timeout);
     }
 
-    /// Gets the address to the process' dedicated TLS region.
+    VAddr GetProcessLocalRegionAddress() const {
-    VAddr GetTLSRegionAddress() const {
+        return plr_address;
-        return tls_region_address;
     }
 
     /// Gets the current status of the process
@@ -279,18 +278,18 @@ public:
     }
 
     /// Retrieves the total physical memory available to this process in bytes.
-    u64 GetTotalPhysicalMemoryAvailable() const;
+    u64 GetTotalPhysicalMemoryAvailable();
 
     /// Retrieves the total physical memory available to this process in bytes,
     /// without the size of the personal system resource heap added to it.
-    u64 GetTotalPhysicalMemoryAvailableWithoutSystemResource() const;
+    u64 GetTotalPhysicalMemoryAvailableWithoutSystemResource();
 
     /// Retrieves the total physical memory used by this process in bytes.
-    u64 GetTotalPhysicalMemoryUsed() const;
+    u64 GetTotalPhysicalMemoryUsed();
 
     /// Retrieves the total physical memory used by this process in bytes,
     /// without the size of the personal system resource heap added to it.
-    u64 GetTotalPhysicalMemoryUsedWithoutSystemResource() const;
+    u64 GetTotalPhysicalMemoryUsedWithoutSystemResource();
 
     /// Gets the list of all threads created with this process as their owner.
     std::list<KThread*>& GetThreadList() {
@@ -413,8 +412,10 @@ private:
     /// Allocates the main thread stack for the process, given the stack size in bytes.
     Result AllocateMainThreadStack(std::size_t stack_size);
 
+    void FinalizeHandleTable();
+
     /// Memory manager for this process
-    std::unique_ptr<KPageTable> page_table;
+    KPageTable page_table;
 
     /// Current status of the process
     State state{};
@@ -433,6 +434,8 @@ private:
     /// Resource limit descriptor for this process
     KResourceLimit* resource_limit{};
 
+    VAddr system_resource_address{};
+
     /// The ideal CPU core for this process, threads are scheduled on this core by default.
     u8 ideal_core = 0;
 
@@ -459,7 +462,7 @@ private:
     KConditionVariable condition_var;
 
     /// Address indicating the location of the process' dedicated TLS region.
-    VAddr tls_region_address = 0;
+    VAddr plr_address = 0;
 
     /// Random values for svcGetInfo RandomEntropy
     std::array<u64, RANDOM_ENTROPY_SIZE> random_entropy{};
@@ -485,8 +488,12 @@ private:
     /// Schedule count of this process
     s64 schedule_count{};
 
+    size_t memory_release_hint{};
+
     bool is_signaled{};
     bool is_suspended{};
+    bool is_immortal{};
+    bool is_handle_table_initialized{};
     bool is_initialized{};
 
     std::atomic<u16> num_running_threads{};

src/core/hle/kernel/kernel.cpp

@@ -95,6 +95,15 @@ struct KernelCore::Impl {
         }
     }
 
+    void CloseCurrentProcess() {
+        (*current_process).Finalize();
+        // current_process->Close();
+        // TODO: The current process should be destroyed based on accurate ref counting after
+        // calling Close(). Adding a manual Destroy() call instead to avoid a memory leak.
+        (*current_process).Destroy();
+        current_process = nullptr;
+    }
+
     void Shutdown() {
         is_shutting_down.store(true, std::memory_order_relaxed);
         SCOPE_EXIT({ is_shutting_down.store(false, std::memory_order_relaxed); });
@@ -157,15 +166,7 @@ struct KernelCore::Impl {
             }
         }
 
-        // Shutdown all processes.
+        CloseCurrentProcess();
-        if (current_process) {
-            (*current_process).Finalize();
-            // current_process->Close();
-            // TODO: The current process should be destroyed based on accurate ref counting after
-            // calling Close(). Adding a manual Destroy() call instead to avoid a memory leak.
-            (*current_process).Destroy();
-            current_process = nullptr;
-        }
 
         // Track kernel objects that were not freed on shutdown
         {
@@ -870,6 +871,10 @@ const KProcess* KernelCore::CurrentProcess() const {
     return impl->current_process;
 }
 
+void KernelCore::CloseCurrentProcess() {
+    impl->CloseCurrentProcess();
+}
+
 const std::vector<KProcess*>& KernelCore::GetProcessList() const {
     return impl->process_list;
 }

src/core/hle/kernel/kernel.h

@@ -131,6 +131,9 @@ public:
     /// Retrieves a const pointer to the current process.
     const KProcess* CurrentProcess() const;
 
+    /// Closes the current process.
+    void CloseCurrentProcess();
+
     /// Retrieves the list of processes.
     const std::vector<KProcess*>& GetProcessList() const;
 

src/core/hle/kernel/svc.cpp

@@ -933,7 +933,7 @@ static Result GetInfo(Core::System& system, u64* result, u64 info_id, Handle han
             return ResultSuccess;
 
         case GetInfoType::UserExceptionContextAddr:
-            *result = process->GetTLSRegionAddress();
+            *result = process->GetProcessLocalRegionAddress();
             return ResultSuccess;
 
         case GetInfoType::TotalPhysicalMemoryAvailableWithoutSystemResource: