core: Make variable shadowing a compile-time error

Now that we have most of core free of shadowing, we can enable the
warning as an error to catch anything that may be remaining and also
eliminate this class of logic bug entirely.

src/core/hle/kernel/global_scheduler_context.cpp

@@ -12,8 +12,8 @@
 
 namespace Kernel {
 
-GlobalSchedulerContext::GlobalSchedulerContext(KernelCore& kernel)
-    : kernel{kernel}, scheduler_lock{kernel} {}
+GlobalSchedulerContext::GlobalSchedulerContext(KernelCore& kernel_)
+    : kernel{kernel_}, scheduler_lock{kernel_} {}
 
 GlobalSchedulerContext::~GlobalSchedulerContext() = default;
 

src/core/hle/kernel/global_scheduler_context.h

@@ -34,7 +34,7 @@ class GlobalSchedulerContext final {
 public:
     using LockType = KAbstractSchedulerLock<KScheduler>;
 
-    explicit GlobalSchedulerContext(KernelCore& kernel);
+    explicit GlobalSchedulerContext(KernelCore& kernel_);
     ~GlobalSchedulerContext();
 
     /// Adds a new thread to the scheduler

src/core/hle/kernel/k_light_condition_variable.h

@@ -18,7 +18,8 @@ class KernelCore;
 
 class KLightConditionVariable {
 public:
-    explicit KLightConditionVariable(KernelCore& kernel) : thread_queue(kernel), kernel(kernel) {}
+    explicit KLightConditionVariable(KernelCore& kernel_)
+        : thread_queue(kernel_), kernel(kernel_) {}
 
     void Wait(KLightLock* lock, s64 timeout = -1) {
         WaitImpl(lock, timeout);

src/core/hle/kernel/k_linked_list.h

@@ -201,10 +201,10 @@ public:
     }
 
     iterator insert(const_iterator pos, reference ref) {
-        KLinkedListNode* node = KLinkedListNode::Allocate(kernel);
-        ASSERT(node != nullptr);
-        node->Initialize(std::addressof(ref));
-        return iterator(BaseList::insert(pos.m_base_it, *node));
+        KLinkedListNode* new_node = KLinkedListNode::Allocate(kernel);
+        ASSERT(new_node != nullptr);
+        new_node->Initialize(std::addressof(ref));
+        return iterator(BaseList::insert(pos.m_base_it, *new_node));
     }
 
     void push_back(reference ref) {

src/core/hle/kernel/k_memory_block_manager.cpp

@@ -7,8 +7,8 @@
 
 namespace Kernel {
 
-KMemoryBlockManager::KMemoryBlockManager(VAddr start_addr, VAddr end_addr)
-    : start_addr{start_addr}, end_addr{end_addr} {
+KMemoryBlockManager::KMemoryBlockManager(VAddr start_addr_, VAddr end_addr_)
+    : start_addr{start_addr_}, end_addr{end_addr_} {
     const u64 num_pages{(end_addr - start_addr) / PageSize};
     memory_block_tree.emplace_back(start_addr, num_pages, KMemoryState::Free,
                                    KMemoryPermission::None, KMemoryAttribute::None);

src/core/hle/kernel/k_memory_block_manager.h

@@ -19,7 +19,7 @@ public:
     using const_iterator = MemoryBlockTree::const_iterator;
 
 public:
-    KMemoryBlockManager(VAddr start_addr, VAddr end_addr);
+    KMemoryBlockManager(VAddr start_addr_, VAddr end_addr_);
 
     iterator end() {
         return memory_block_tree.end();

src/core/hle/kernel/k_page_linked_list.h

@@ -17,7 +17,7 @@ class KPageLinkedList final {
 public:
     class Node final {
     public:
-        constexpr Node(u64 addr, std::size_t num_pages) : addr{addr}, num_pages{num_pages} {}
+        constexpr Node(u64 addr_, std::size_t num_pages_) : addr{addr_}, num_pages{num_pages_} {}
 
         constexpr u64 GetAddress() const {
             return addr;

src/core/hle/kernel/k_page_table.cpp

@@ -58,7 +58,7 @@ constexpr std::size_t GetSizeInRange(const KMemoryInfo& info, VAddr start, VAddr
 
 } // namespace
 
-KPageTable::KPageTable(Core::System& system) : system{system} {}
+KPageTable::KPageTable(Core::System& system_) : system{system_} {}
 
 ResultCode KPageTable::InitializeForProcess(FileSys::ProgramAddressSpaceType as_type,
                                             bool enable_aslr, VAddr code_addr,
@@ -906,8 +906,8 @@ ResultCode KPageTable::LockForDeviceAddressSpace(VAddr addr, std::size_t size) {
 
     block_manager->UpdateLock(
         addr, size / PageSize,
-        [](KMemoryBlockManager::iterator block, KMemoryPermission perm) {
-            block->ShareToDevice(perm);
+        [](KMemoryBlockManager::iterator block, KMemoryPermission permission) {
+            block->ShareToDevice(permission);
         },
         perm);
 
@@ -929,8 +929,8 @@ ResultCode KPageTable::UnlockForDeviceAddressSpace(VAddr addr, std::size_t size)
 
     block_manager->UpdateLock(
         addr, size / PageSize,
-        [](KMemoryBlockManager::iterator block, KMemoryPermission perm) {
-            block->UnshareToDevice(perm);
+        [](KMemoryBlockManager::iterator block, KMemoryPermission permission) {
+            block->UnshareToDevice(permission);
         },
         perm);
 

src/core/hle/kernel/k_page_table.h

@@ -24,7 +24,7 @@ class KMemoryBlockManager;
 
 class KPageTable final : NonCopyable {
 public:
-    explicit KPageTable(Core::System& system);
+    explicit KPageTable(Core::System& system_);
 
     ResultCode InitializeForProcess(FileSys::ProgramAddressSpaceType as_type, bool enable_aslr,
                                     VAddr code_addr, std::size_t code_size,

src/core/hle/kernel/k_scheduler.cpp

@@ -607,7 +607,7 @@ void KScheduler::YieldToAnyThread(KernelCore& kernel) {
     }
 }
 
-KScheduler::KScheduler(Core::System& system, s32 core_id) : system(system), core_id(core_id) {
+KScheduler::KScheduler(Core::System& system_, s32 core_id_) : system{system_}, core_id{core_id_} {
     switch_fiber = std::make_shared<Common::Fiber>(OnSwitch, this);
     state.needs_scheduling.store(true);
     state.interrupt_task_thread_runnable = false;

src/core/hle/kernel/k_scheduler.h

@@ -30,7 +30,7 @@ class KThread;
 
 class KScheduler final {
 public:
-    explicit KScheduler(Core::System& system, s32 core_id);
+    explicit KScheduler(Core::System& system_, s32 core_id_);
     ~KScheduler();
 
     /// Reschedules to the next available thread (call after current thread is suspended)

src/core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h

@@ -17,8 +17,8 @@ namespace Kernel {
 
 class [[nodiscard]] KScopedSchedulerLockAndSleep {
 public:
-    explicit KScopedSchedulerLockAndSleep(KernelCore & kernel, KThread * t, s64 timeout)
-        : kernel(kernel), thread(t), timeout_tick(timeout) {
+    explicit KScopedSchedulerLockAndSleep(KernelCore & kernel_, KThread * t, s64 timeout)
+        : kernel(kernel_), thread(t), timeout_tick(timeout) {
         // Lock the scheduler.
         kernel.GlobalSchedulerContext().scheduler_lock.Lock();
     }

src/core/hle/kernel/k_thread_queue.h

@@ -10,7 +10,7 @@ namespace Kernel {
 
 class KThreadQueue {
 public:
-    explicit KThreadQueue(KernelCore& kernel) : kernel{kernel} {}
+    explicit KThreadQueue(KernelCore& kernel_) : kernel{kernel_} {}
 
     bool IsEmpty() const {
         return wait_list.empty();

src/core/hle/kernel/physical_core.cpp

@@ -13,10 +13,10 @@
 
 namespace Kernel {
 
-PhysicalCore::PhysicalCore(std::size_t core_index, Core::System& system,
-                           Kernel::KScheduler& scheduler, Core::CPUInterrupts& interrupts)
-    : core_index{core_index}, system{system}, scheduler{scheduler},
-      interrupts{interrupts}, guard{std::make_unique<Common::SpinLock>()} {}
+PhysicalCore::PhysicalCore(std::size_t core_index_, Core::System& system_, KScheduler& scheduler_,
+                           Core::CPUInterrupts& interrupts_)
+    : core_index{core_index_}, system{system_}, scheduler{scheduler_},
+      interrupts{interrupts_}, guard{std::make_unique<Common::SpinLock>()} {}
 
 PhysicalCore::~PhysicalCore() = default;
 

src/core/hle/kernel/physical_core.h

@@ -28,8 +28,8 @@ namespace Kernel {
 
 class PhysicalCore {
 public:
-    PhysicalCore(std::size_t core_index, Core::System& system, Kernel::KScheduler& scheduler,
-                 Core::CPUInterrupts& interrupts);
+    PhysicalCore(std::size_t core_index_, Core::System& system_, KScheduler& scheduler_,
+                 Core::CPUInterrupts& interrupts_);
     ~PhysicalCore();
 
     PhysicalCore(const PhysicalCore&) = delete;

src/core/hle/kernel/svc.cpp

@@ -819,10 +819,10 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, Handle
             return RESULT_SUCCESS;
         }
 
-        Handle handle{};
-        R_TRY(handle_table.Add(&handle, resource_limit));
+        Handle resource_handle{};
+        R_TRY(handle_table.Add(&resource_handle, resource_limit));
 
-        *result = handle;
+        *result = resource_handle;
         return RESULT_SUCCESS;
     }