svc: Implement svcGetInfo command 0xF0000002

This retrieves:

if (curr_thread == handle_thread) {
   result = total_thread_ticks + (hardware_tick_count - last_context_switch_ticks);
} else if (curr_thread == handle_thread && sub_id == current_core_index) {
   result = hardware_tick_count - last_context_switch_ticks;
}
This commit is contained in:
Lioncash 2018-10-25 18:42:50 -04:00
parent d278f25bda
commit 6594853eb1
6 changed files with 98 additions and 4 deletions

View file

@ -202,6 +202,16 @@ public:
return is_64bit_process;
}
/// Gets the total running time of the process instance in ticks.
u64 GetCPUTimeTicks() const {
return total_process_running_time_ticks;
}
/// Updates the total running time, adding the given ticks to it.
void UpdateCPUTimeTicks(u64 ticks) {
total_process_running_time_ticks += ticks;
}
/**
* Loads process-specifics configuration info with metadata provided
* by an executable.
@ -305,6 +315,9 @@ private:
/// specified by metadata provided to the process during loading.
bool is_64bit_process = true;
/// Total running time for the process in ticks.
u64 total_process_running_time_ticks = 0;
/// Per-process handle table for storing created object handles in.
HandleTable handle_table;

View file

@ -9,6 +9,7 @@
#include "common/logging/log.h"
#include "core/arm/arm_interface.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/scheduler.h"
@ -34,6 +35,10 @@ Thread* Scheduler::GetCurrentThread() const {
return current_thread.get();
}
u64 Scheduler::GetLastContextSwitchTicks() const {
return last_context_switch_time;
}
Thread* Scheduler::PopNextReadyThread() {
Thread* next = nullptr;
Thread* thread = GetCurrentThread();
@ -54,7 +59,10 @@ Thread* Scheduler::PopNextReadyThread() {
}
void Scheduler::SwitchContext(Thread* new_thread) {
Thread* previous_thread = GetCurrentThread();
Thread* const previous_thread = GetCurrentThread();
Process* const previous_process = Core::CurrentProcess();
UpdateLastContextSwitchTime(previous_thread, previous_process);
// Save context for previous thread
if (previous_thread) {
@ -78,8 +86,6 @@ void Scheduler::SwitchContext(Thread* new_thread) {
// Cancel any outstanding wakeup events for this thread
new_thread->CancelWakeupTimer();
auto* const previous_process = Core::CurrentProcess();
current_thread = new_thread;
ready_queue.remove(new_thread->GetPriority(), new_thread);
@ -102,6 +108,22 @@ void Scheduler::SwitchContext(Thread* new_thread) {
}
}
void Scheduler::UpdateLastContextSwitchTime(Thread* thread, Process* process) {
const u64 prev_switch_ticks = last_context_switch_time;
const u64 most_recent_switch_ticks = CoreTiming::GetTicks();
const u64 update_ticks = most_recent_switch_ticks - prev_switch_ticks;
if (thread != nullptr) {
thread->UpdateCPUTimeTicks(update_ticks);
}
if (process != nullptr) {
process->UpdateCPUTimeTicks(update_ticks);
}
last_context_switch_time = most_recent_switch_ticks;
}
void Scheduler::Reschedule() {
std::lock_guard<std::mutex> lock(scheduler_mutex);

View file

@ -17,6 +17,8 @@ class ARM_Interface;
namespace Kernel {
class Process;
class Scheduler final {
public:
explicit Scheduler(Core::ARM_Interface& cpu_core);
@ -31,6 +33,9 @@ public:
/// Gets the current running thread
Thread* GetCurrentThread() const;
/// Gets the timestamp for the last context switch in ticks.
u64 GetLastContextSwitchTicks() const;
/// Adds a new thread to the scheduler
void AddThread(SharedPtr<Thread> thread, u32 priority);
@ -64,6 +69,19 @@ private:
*/
void SwitchContext(Thread* new_thread);
/**
* Called on every context switch to update the internal timestamp
* This also updates the running time ticks for the given thread and
* process using the following difference:
*
* ticks += most_recent_ticks - last_context_switch_ticks
*
* The internal tick timestamp for the scheduler is simply the
* most recent tick count retrieved. No special arithmetic is
* applied to it.
*/
void UpdateLastContextSwitchTime(Thread* thread, Process* process);
/// Lists all thread ids that aren't deleted/etc.
std::vector<SharedPtr<Thread>> thread_list;
@ -73,6 +91,7 @@ private:
SharedPtr<Thread> current_thread = nullptr;
Core::ARM_Interface& cpu_core;
u64 last_context_switch_time = 0;
static std::mutex scheduler_mutex;
};

View file

@ -529,6 +529,36 @@ static ResultCode GetInfo(u64* result, u64 info_id, u64 handle, u64 info_sub_id)
"(STUBBED) Attempted to query user exception context address, returned 0");
*result = 0;
break;
case GetInfoType::ThreadTickCount: {
constexpr u64 num_cpus = 4;
if (info_sub_id != 0xFFFFFFFFFFFFFFFF && info_sub_id >= num_cpus) {
return ERR_INVALID_COMBINATION_KERNEL;
}
const auto thread =
current_process->GetHandleTable().Get<Thread>(static_cast<Handle>(handle));
if (!thread) {
return ERR_INVALID_HANDLE;
}
auto& system = Core::System::GetInstance();
const auto& scheduler = system.CurrentScheduler();
const auto* const current_thread = scheduler.GetCurrentThread();
const bool same_thread = current_thread == thread;
const u64 prev_ctx_ticks = scheduler.GetLastContextSwitchTicks();
u64 out_ticks = 0;
if (same_thread && info_sub_id == 0xFFFFFFFFFFFFFFFF) {
const u64 thread_ticks = current_thread->GetTotalCPUTimeTicks();
out_ticks = thread_ticks + (CoreTiming::GetTicks() - prev_ctx_ticks);
} else if (same_thread && info_sub_id == system.CurrentCoreIndex()) {
out_ticks = CoreTiming::GetTicks() - prev_ctx_ticks;
}
*result = out_ticks;
break;
}
default:
UNIMPLEMENTED();
}

View file

@ -53,6 +53,7 @@ enum class GetInfoType : u64 {
PrivilegedProcessId = 19,
// 5.0.0+
UserExceptionContextAddr = 20,
ThreadTickCount = 0xF0000002,
};
void CallSVC(u32 immediate);

View file

@ -258,6 +258,14 @@ public:
return last_running_ticks;
}
u64 GetTotalCPUTimeTicks() const {
return total_cpu_time_ticks;
}
void UpdateCPUTimeTicks(u64 ticks) {
total_cpu_time_ticks += ticks;
}
s32 GetProcessorID() const {
return processor_id;
}
@ -378,6 +386,7 @@ private:
u32 nominal_priority = 0; ///< Nominal thread priority, as set by the emulated application
u32 current_priority = 0; ///< Current thread priority, can be temporarily changed
u64 total_cpu_time_ticks = 0; ///< Total CPU running ticks.
u64 last_running_ticks = 0; ///< CPU tick when thread was last running
s32 processor_id = 0;