Merge pull request #750 from Subv/process_svc

Core/HLE: Implemented the SVCs GetProcessId and GetProcessIdOfThread

src/core/hle/kernel/kernel.cpp

@@ -115,8 +115,7 @@ SharedPtr<Object> HandleTable::GetGeneric(Handle handle) const {
     if (handle == CurrentThread) {
         return GetCurrentThread();
     } else if (handle == CurrentProcess) {
-        LOG_ERROR(Kernel, "Current process (%08X) pseudo-handle not supported", CurrentProcess);
-        return nullptr;
+        return g_current_process;
     }
 
     if (!IsValid(handle)) {
@@ -139,6 +138,9 @@ void Init() {
     Kernel::TimersInit();
 
     Object::next_object_id = 0;
+    // TODO(Subv): Start the process ids from 10 for now, as lower PIDs are
+    // reserved for low-level services
+    Process::next_process_id = 10;
 }
 
 /// Shutdown the kernel

src/core/hle/kernel/process.cpp

@@ -12,6 +12,8 @@
 
 namespace Kernel {
 
+u32 Process::next_process_id;
+
 SharedPtr<Process> Process::Create(std::string name, u64 program_id) {
     SharedPtr<Process> process(new Process);
 

src/core/hle/kernel/process.h

@@ -55,6 +55,8 @@ public:
     static const HandleType HANDLE_TYPE = HandleType::Process;
     HandleType GetHandleType() const override { return HANDLE_TYPE; }
 
+    static u32 next_process_id;
+
     /// Name of the process
     std::string name;
     /// Title ID corresponding to the process
@@ -69,6 +71,9 @@ public:
     boost::container::static_vector<AddressMapping, 8> address_mappings;
     ProcessFlags flags;
 
+    /// The id of this process
+    u32 process_id = next_process_id++;
+
     /**
      * Parses a list of kernel capability descriptors (as found in the ExHeader) and applies them
      * to this process.

src/core/hle/kernel/thread.cpp

@@ -17,6 +17,7 @@
 #include "core/core_timing.h"
 #include "core/hle/hle.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/process.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/mutex.h"
 #include "core/hle/result.h"
@@ -402,6 +403,7 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
     thread->wait_address = 0;
     thread->name = std::move(name);
     thread->callback_handle = wakeup_callback_handle_table.Create(thread).MoveFrom();
+    thread->owner_process = g_current_process;
 
     VAddr tls_address = Memory::TLS_AREA_VADDR + (thread->thread_id - 1) * 0x200;
 

src/core/hle/kernel/thread.h

@@ -45,6 +45,7 @@ enum ThreadStatus {
 namespace Kernel {
 
 class Mutex;
+class Process;
 
 class Thread final : public WaitObject {
 public:
@@ -161,6 +162,7 @@ public:
     /// Mutexes currently held by this thread, which will be released when it exits.
     boost::container::flat_set<SharedPtr<Mutex>> held_mutexes;
 
+    SharedPtr<Process> owner_process; ///< Process that owns this thread
     std::vector<SharedPtr<WaitObject>> wait_objects; ///< Objects that the thread is waiting on
     VAddr wait_address;     ///< If waiting on an AddressArbiter, this is the arbitration address
     bool wait_all;          ///< True if the thread is waiting on all objects before resuming

src/core/hle/svc.cpp

@@ -16,6 +16,7 @@
 #include "core/hle/kernel/address_arbiter.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/mutex.h"
+#include "core/hle/kernel/process.h"
 #include "core/hle/kernel/semaphore.h"
 #include "core/hle/kernel/shared_memory.h"
 #include "core/hle/kernel/thread.h"
@@ -424,6 +425,34 @@ static ResultCode ReleaseMutex(Handle handle) {
     return RESULT_SUCCESS;
 }
 
+/// Get the ID of the specified process
+static ResultCode GetProcessId(u32* process_id, Handle process_handle) {
+    LOG_TRACE(Kernel_SVC, "called process=0x%08X", process_handle);
+
+    const SharedPtr<Kernel::Process> process = Kernel::g_handle_table.Get<Kernel::Process>(process_handle);
+    if (process == nullptr)
+        return ERR_INVALID_HANDLE;
+
+    *process_id = process->process_id;
+    return RESULT_SUCCESS;
+}
+
+/// Get the ID of the process that owns the specified thread
+static ResultCode GetProcessIdOfThread(u32* process_id, Handle thread_handle) {
+    LOG_TRACE(Kernel_SVC, "called thread=0x%08X", thread_handle);
+
+    const SharedPtr<Kernel::Thread> thread = Kernel::g_handle_table.Get<Kernel::Thread>(thread_handle);
+    if (thread == nullptr)
+        return ERR_INVALID_HANDLE;
+
+    const SharedPtr<Kernel::Process> process = thread->owner_process;
+    
+    ASSERT_MSG(process != nullptr, "Invalid parent process for thread=0x%08X", thread_handle);
+
+    *process_id = process->process_id;
+    return RESULT_SUCCESS;
+}
+
 /// Get the ID for the specified thread.
 static ResultCode GetThreadId(u32* thread_id, Handle handle) {
     LOG_TRACE(Kernel_SVC, "called thread=0x%08X", handle);
@@ -674,8 +703,8 @@ static const FunctionDef SVC_Table[] = {
     {0x32, HLE::Wrap<SendSyncRequest>,      "SendSyncRequest"},
     {0x33, nullptr,                         "OpenProcess"},
     {0x34, nullptr,                         "OpenThread"},
-    {0x35, nullptr,                         "GetProcessId"},
-    {0x36, nullptr,                         "GetProcessIdOfThread"},
+    {0x35, HLE::Wrap<GetProcessId>,         "GetProcessId"},
+    {0x36, HLE::Wrap<GetProcessIdOfThread>, "GetProcessIdOfThread"},
     {0x37, HLE::Wrap<GetThreadId>,          "GetThreadId"},
     {0x38, HLE::Wrap<GetResourceLimit>,     "GetResourceLimit"},
     {0x39, nullptr,                         "GetResourceLimitLimitValues"},