core/memory: Migrate over address checking functions to the new Memory class

A fairly straightforward migration. These member functions can just be
mostly moved verbatim with minor changes. We already have the necessary
plumbing in places that they're used.

IsKernelVirtualAddress() can remain a non-member function, since it
doesn't rely on class state in any form.

src/core/gdbstub/gdbstub.cpp

@@ -969,7 +969,8 @@ static void ReadMemory() {
         SendReply("E01");
     }
 
-    if (!Memory::IsValidVirtualAddress(addr)) {
+    const auto& memory = Core::System::GetInstance().Memory();
+    if (!memory.IsValidVirtualAddress(addr)) {
         return SendReply("E00");
     }
 
@@ -984,22 +985,23 @@ static void ReadMemory() {
 /// Modify location in memory with data received from the gdb client.
 static void WriteMemory() {
     auto start_offset = command_buffer + 1;
-    auto addr_pos = std::find(start_offset, command_buffer + command_length, ',');
-    VAddr addr = HexToLong(start_offset, static_cast<u64>(addr_pos - start_offset));
+    const auto addr_pos = std::find(start_offset, command_buffer + command_length, ',');
+    const VAddr addr = HexToLong(start_offset, static_cast<u64>(addr_pos - start_offset));
 
     start_offset = addr_pos + 1;
-    auto len_pos = std::find(start_offset, command_buffer + command_length, ':');
-    u64 len = HexToLong(start_offset, static_cast<u64>(len_pos - start_offset));
+    const auto len_pos = std::find(start_offset, command_buffer + command_length, ':');
+    const u64 len = HexToLong(start_offset, static_cast<u64>(len_pos - start_offset));
 
-    if (!Memory::IsValidVirtualAddress(addr)) {
+    auto& system = Core::System::GetInstance();
+    const auto& memory = system.Memory();
+    if (!memory.IsValidVirtualAddress(addr)) {
         return SendReply("E00");
     }
 
     std::vector<u8> data(len);
-
     GdbHexToMem(data.data(), len_pos + 1, len);
     Memory::WriteBlock(addr, data.data(), len);
-    Core::System::GetInstance().InvalidateCpuInstructionCaches();
+    system.InvalidateCpuInstructionCaches();
     SendReply("OK");
 }
 

src/core/hle/kernel/address_arbiter.cpp

@@ -68,7 +68,7 @@ ResultCode AddressArbiter::SignalToAddressOnly(VAddr address, s32 num_to_wake) {
 ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32 value,
                                                               s32 num_to_wake) {
     // Ensure that we can write to the address.
-    if (!Memory::IsValidVirtualAddress(address)) {
+    if (!system.Memory().IsValidVirtualAddress(address)) {
         return ERR_INVALID_ADDRESS_STATE;
     }
 
@@ -83,7 +83,7 @@ ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32
 ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
                                                                          s32 num_to_wake) {
     // Ensure that we can write to the address.
-    if (!Memory::IsValidVirtualAddress(address)) {
+    if (!system.Memory().IsValidVirtualAddress(address)) {
         return ERR_INVALID_ADDRESS_STATE;
     }
 
@@ -135,7 +135,7 @@ ResultCode AddressArbiter::WaitForAddress(VAddr address, ArbitrationType type, s
 ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
                                                     bool should_decrement) {
     // Ensure that we can read the address.
-    if (!Memory::IsValidVirtualAddress(address)) {
+    if (!system.Memory().IsValidVirtualAddress(address)) {
         return ERR_INVALID_ADDRESS_STATE;
     }
 
@@ -158,7 +158,7 @@ ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s6
 
 ResultCode AddressArbiter::WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
     // Ensure that we can read the address.
-    if (!Memory::IsValidVirtualAddress(address)) {
+    if (!system.Memory().IsValidVirtualAddress(address)) {
         return ERR_INVALID_ADDRESS_STATE;
     }
     // Only wait for the address if equal.

src/core/hle/kernel/svc.cpp

@@ -332,7 +332,7 @@ static ResultCode UnmapMemory(Core::System& system, VAddr dst_addr, VAddr src_ad
 /// Connect to an OS service given the port name, returns the handle to the port to out
 static ResultCode ConnectToNamedPort(Core::System& system, Handle* out_handle,
                                      VAddr port_name_address) {
-    if (!Memory::IsValidVirtualAddress(port_name_address)) {
+    if (!system.Memory().IsValidVirtualAddress(port_name_address)) {
         LOG_ERROR(Kernel_SVC,
                   "Port Name Address is not a valid virtual address, port_name_address=0x{:016X}",
                   port_name_address);
@@ -452,7 +452,7 @@ static ResultCode WaitSynchronization(Core::System& system, Handle* index, VAddr
     LOG_TRACE(Kernel_SVC, "called handles_address=0x{:X}, handle_count={}, nano_seconds={}",
               handles_address, handle_count, nano_seconds);
 
-    if (!Memory::IsValidVirtualAddress(handles_address)) {
+    if (!system.Memory().IsValidVirtualAddress(handles_address)) {
         LOG_ERROR(Kernel_SVC,
                   "Handle address is not a valid virtual address, handle_address=0x{:016X}",
                   handles_address);

src/core/hle/kernel/thread.cpp

@@ -162,13 +162,13 @@ ResultVal<std::shared_ptr<Thread>> Thread::Create(KernelCore& kernel, std::strin
         return ERR_INVALID_PROCESSOR_ID;
     }
 
-    if (!Memory::IsValidVirtualAddress(owner_process, entry_point)) {
+    auto& system = Core::System::GetInstance();
+    if (!system.Memory().IsValidVirtualAddress(owner_process, entry_point)) {
         LOG_ERROR(Kernel_SVC, "(name={}): invalid entry {:016X}", name, entry_point);
         // TODO (bunnei): Find the correct error code to use here
         return RESULT_UNKNOWN;
     }
 
-    auto& system = Core::System::GetInstance();
     std::shared_ptr<Thread> thread = std::make_shared<Thread>(kernel);
 
     thread->thread_id = kernel.CreateNewThreadID();

src/core/memory.cpp

@@ -75,6 +75,29 @@ struct Memory::Impl {
             std::make_pair(interval, std::set<Common::SpecialRegion>{region}));
     }
 
+    bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) const {
+        const auto& page_table = process.VMManager().page_table;
+
+        const u8* const page_pointer = page_table.pointers[vaddr >> PAGE_BITS];
+        if (page_pointer != nullptr) {
+            return true;
+        }
+
+        if (page_table.attributes[vaddr >> PAGE_BITS] == Common::PageType::RasterizerCachedMemory) {
+            return true;
+        }
+
+        if (page_table.attributes[vaddr >> PAGE_BITS] != Common::PageType::Special) {
+            return false;
+        }
+
+        return false;
+    }
+
+    bool IsValidVirtualAddress(VAddr vaddr) const {
+        return IsValidVirtualAddress(*system.CurrentProcess(), vaddr);
+    }
+
     /**
      * Maps a region of pages as a specific type.
      *
@@ -148,6 +171,14 @@ void Memory::RemoveDebugHook(Common::PageTable& page_table, VAddr base, u64 size
     impl->RemoveDebugHook(page_table, base, size, std::move(hook));
 }
 
+bool Memory::IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) const {
+    return impl->IsValidVirtualAddress(process, vaddr);
+}
+
+bool Memory::IsValidVirtualAddress(const VAddr vaddr) const {
+    return impl->IsValidVirtualAddress(vaddr);
+}
+
 void SetCurrentPageTable(Kernel::Process& process) {
     current_page_table = &process.VMManager().page_table;
 
@@ -256,26 +287,6 @@ void Write(const VAddr vaddr, const T data) {
     }
 }
 
-bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) {
-    const auto& page_table = process.VMManager().page_table;
-
-    const u8* page_pointer = page_table.pointers[vaddr >> PAGE_BITS];
-    if (page_pointer)
-        return true;
-
-    if (page_table.attributes[vaddr >> PAGE_BITS] == Common::PageType::RasterizerCachedMemory)
-        return true;
-
-    if (page_table.attributes[vaddr >> PAGE_BITS] != Common::PageType::Special)
-        return false;
-
-    return false;
-}
-
-bool IsValidVirtualAddress(const VAddr vaddr) {
-    return IsValidVirtualAddress(*Core::System::GetInstance().CurrentProcess(), vaddr);
-}
-
 bool IsKernelVirtualAddress(const VAddr vaddr) {
     return KERNEL_REGION_VADDR <= vaddr && vaddr < KERNEL_REGION_END;
 }

src/core/memory.h

@@ -111,6 +111,27 @@ public:
     void RemoveDebugHook(Common::PageTable& page_table, VAddr base, u64 size,
                          Common::MemoryHookPointer hook);
 
+    /**
+     * Checks whether or not the supplied address is a valid virtual
+     * address for the given process.
+     *
+     * @param process The emulated process to check the address against.
+     * @param vaddr   The virtual address to check the validity of.
+     *
+     * @returns True if the given virtual address is valid, false otherwise.
+     */
+    bool IsValidVirtualAddress(const Kernel::Process& process, VAddr vaddr) const;
+
+    /**
+     * Checks whether or not the supplied address is a valid virtual
+     * address for the current process.
+     *
+     * @param vaddr The virtual address to check the validity of.
+     *
+     * @returns True if the given virtual address is valid, false otherwise.
+     */
+    bool IsValidVirtualAddress(VAddr vaddr) const;
+
 private:
     struct Impl;
     std::unique_ptr<Impl> impl;
@@ -120,9 +141,6 @@ private:
 /// the given process instance.
 void SetCurrentPageTable(Kernel::Process& process);
 
-/// Determines if the given VAddr is valid for the specified process.
-bool IsValidVirtualAddress(const Kernel::Process& process, VAddr vaddr);
-bool IsValidVirtualAddress(VAddr vaddr);
 /// Determines if the given VAddr is a kernel address
 bool IsKernelVirtualAddress(VAddr vaddr);