suyu/src/core/hle/kernel/process.h
Lioncash 73bb87c06b kernel/process: Move name and system context to the bottom of the member list
These aren't directly important or commonly used within the process, so
we can move these to the bottom to allow everything else to be more
likely to be within a cache line.
2020-07-15 13:40:18 -04:00

404 lines
13 KiB
C++

// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <cstddef>
#include <list>
#include <string>
#include <unordered_map>
#include <vector>
#include "common/common_types.h"
#include "core/hle/kernel/address_arbiter.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/mutex.h"
#include "core/hle/kernel/process_capability.h"
#include "core/hle/kernel/synchronization_object.h"
#include "core/hle/result.h"
namespace Core {
class System;
}
namespace FileSys {
class ProgramMetadata;
}
namespace Kernel {
class KernelCore;
class ResourceLimit;
class Thread;
class TLSPage;
struct CodeSet;
namespace Memory {
class PageTable;
}
enum class MemoryRegion : u16 {
APPLICATION = 1,
SYSTEM = 2,
BASE = 3,
};
/**
* Indicates the status of a Process instance.
*
* @note These match the values as used by kernel,
* so new entries should only be added if RE
* shows that a new value has been introduced.
*/
enum class ProcessStatus {
Created,
CreatedWithDebuggerAttached,
Running,
WaitingForDebuggerToAttach,
DebuggerAttached,
Exiting,
Exited,
DebugBreak,
};
class Process final : public SynchronizationObject {
public:
explicit Process(Core::System& system);
~Process() override;
enum : u64 {
/// Lowest allowed process ID for a kernel initial process.
InitialKIPIDMin = 1,
/// Highest allowed process ID for a kernel initial process.
InitialKIPIDMax = 80,
/// Lowest allowed process ID for a userland process.
ProcessIDMin = 81,
/// Highest allowed process ID for a userland process.
ProcessIDMax = 0xFFFFFFFFFFFFFFFF,
};
// Used to determine how process IDs are assigned.
enum class ProcessType {
KernelInternal,
Userland,
};
static constexpr std::size_t RANDOM_ENTROPY_SIZE = 4;
static std::shared_ptr<Process> Create(Core::System& system, std::string name,
ProcessType type);
std::string GetTypeName() const override {
return "Process";
}
std::string GetName() const override {
return name;
}
static constexpr HandleType HANDLE_TYPE = HandleType::Process;
HandleType GetHandleType() const override {
return HANDLE_TYPE;
}
/// Gets a reference to the process' page table.
Memory::PageTable& PageTable() {
return *page_table;
}
/// Gets const a reference to the process' page table.
const Memory::PageTable& PageTable() const {
return *page_table;
}
/// Gets a reference to the process' handle table.
HandleTable& GetHandleTable() {
return handle_table;
}
/// Gets a const reference to the process' handle table.
const HandleTable& GetHandleTable() const {
return handle_table;
}
/// Gets a reference to the process' address arbiter.
AddressArbiter& GetAddressArbiter() {
return address_arbiter;
}
/// Gets a const reference to the process' address arbiter.
const AddressArbiter& GetAddressArbiter() const {
return address_arbiter;
}
/// Gets a reference to the process' mutex lock.
Mutex& GetMutex() {
return mutex;
}
/// Gets a const reference to the process' mutex lock
const Mutex& GetMutex() const {
return mutex;
}
/// Gets the address to the process' dedicated TLS region.
VAddr GetTLSRegionAddress() const {
return tls_region_address;
}
/// Gets the current status of the process
ProcessStatus GetStatus() const {
return status;
}
/// Gets the unique ID that identifies this particular process.
u64 GetProcessID() const {
return process_id;
}
/// Gets the title ID corresponding to this process.
u64 GetTitleID() const {
return program_id;
}
/// Gets the resource limit descriptor for this process
std::shared_ptr<ResourceLimit> GetResourceLimit() const;
/// Gets the ideal CPU core ID for this process
u8 GetIdealCore() const {
return ideal_core;
}
/// Gets the bitmask of allowed cores that this process' threads can run on.
u64 GetCoreMask() const {
return capabilities.GetCoreMask();
}
/// Gets the bitmask of allowed thread priorities.
u64 GetPriorityMask() const {
return capabilities.GetPriorityMask();
}
/// Gets the amount of secure memory to allocate for memory management.
u32 GetSystemResourceSize() const {
return system_resource_size;
}
/// Gets the amount of secure memory currently in use for memory management.
u32 GetSystemResourceUsage() const {
// On hardware, this returns the amount of system resource memory that has
// been used by the kernel. This is problematic for Yuzu to emulate, because
// system resource memory is used for page tables -- and yuzu doesn't really
// have a way to calculate how much memory is required for page tables for
// the current process at any given time.
// TODO: Is this even worth implementing? Games may retrieve this value via
// an SDK function that gets used + available system resource size for debug
// or diagnostic purposes. However, it seems unlikely that a game would make
// decisions based on how much system memory is dedicated to its page tables.
// Is returning a value other than zero wise?
return 0;
}
/// Whether this process is an AArch64 or AArch32 process.
bool Is64BitProcess() const {
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;
}
/// Gets 8 bytes of random data for svcGetInfo RandomEntropy
u64 GetRandomEntropy(std::size_t index) const {
return random_entropy.at(index);
}
/// Retrieves the total physical memory available to this process in bytes.
u64 GetTotalPhysicalMemoryAvailable() const;
/// 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;
/// Retrieves the total physical memory used by this process in bytes.
u64 GetTotalPhysicalMemoryUsed() const;
/// 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;
/// Gets the list of all threads created with this process as their owner.
const std::list<const Thread*>& GetThreadList() const {
return thread_list;
}
/// Insert a thread into the condition variable wait container
void InsertConditionVariableThread(std::shared_ptr<Thread> thread);
/// Remove a thread from the condition variable wait container
void RemoveConditionVariableThread(std::shared_ptr<Thread> thread);
/// Obtain all condition variable threads waiting for some address
std::vector<std::shared_ptr<Thread>> GetConditionVariableThreads(VAddr cond_var_addr);
/// Registers a thread as being created under this process,
/// adding it to this process' thread list.
void RegisterThread(const Thread* thread);
/// Unregisters a thread from this process, removing it
/// from this process' thread list.
void UnregisterThread(const Thread* thread);
/// Clears the signaled state of the process if and only if it's signaled.
///
/// @pre The process must not be already terminated. If this is called on a
/// terminated process, then ERR_INVALID_STATE will be returned.
///
/// @pre The process must be in a signaled state. If this is called on a
/// process instance that is not signaled, ERR_INVALID_STATE will be
/// returned.
ResultCode ClearSignalState();
/**
* Loads process-specifics configuration info with metadata provided
* by an executable.
*
* @param metadata The provided metadata to load process specific info from.
*
* @returns RESULT_SUCCESS if all relevant metadata was able to be
* loaded and parsed. Otherwise, an error code is returned.
*/
ResultCode LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std::size_t code_size);
/**
* Starts the main application thread for this process.
*
* @param main_thread_priority The priority for the main thread.
* @param stack_size The stack size for the main thread in bytes.
*/
void Run(s32 main_thread_priority, u64 stack_size);
/**
* Prepares a process for termination by stopping all of its threads
* and clearing any other resources.
*/
void PrepareForTermination();
void LoadModule(CodeSet code_set, VAddr base_addr);
///////////////////////////////////////////////////////////////////////////////////////////////
// Thread-local storage management
// Marks the next available region as used and returns the address of the slot.
[[nodiscard]] VAddr CreateTLSRegion();
// Frees a used TLS slot identified by the given address
void FreeTLSRegion(VAddr tls_address);
private:
/// Checks if the specified thread should wait until this process is available.
bool ShouldWait(const Thread* thread) const override;
/// Acquires/locks this process for the specified thread if it's available.
void Acquire(Thread* thread) override;
/// Changes the process status. If the status is different
/// from the current process status, then this will trigger
/// a process signal.
void ChangeStatus(ProcessStatus new_status);
/// Allocates the main thread stack for the process, given the stack size in bytes.
ResultCode AllocateMainThreadStack(std::size_t stack_size);
/// Memory manager for this process
std::unique_ptr<Memory::PageTable> page_table;
/// Current status of the process
ProcessStatus status{};
/// The ID of this process
u64 process_id = 0;
/// Title ID corresponding to the process
u64 program_id = 0;
/// Specifies additional memory to be reserved for the process's memory management by the
/// system. When this is non-zero, secure memory is allocated and used for page table allocation
/// instead of using the normal global page tables/memory block management.
u32 system_resource_size = 0;
/// Resource limit descriptor for this process
std::shared_ptr<ResourceLimit> resource_limit;
/// The ideal CPU core for this process, threads are scheduled on this core by default.
u8 ideal_core = 0;
/// The Thread Local Storage area is allocated as processes create threads,
/// each TLS area is 0x200 bytes, so one page (0x1000) is split up in 8 parts, and each part
/// holds the TLS for a specific thread. This vector contains which parts are in use for each
/// page as a bitmask.
/// This vector will grow as more pages are allocated for new threads.
std::vector<TLSPage> tls_pages;
/// Contains the parsed process capability descriptors.
ProcessCapabilities capabilities;
/// Whether or not this process is AArch64, or AArch32.
/// By default, we currently assume this is true, unless otherwise
/// 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;
/// Per-process address arbiter.
AddressArbiter address_arbiter;
/// The per-process mutex lock instance used for handling various
/// forms of services, such as lock arbitration, and condition
/// variable related facilities.
Mutex mutex;
/// Address indicating the location of the process' dedicated TLS region.
VAddr tls_region_address = 0;
/// Random values for svcGetInfo RandomEntropy
std::array<u64, RANDOM_ENTROPY_SIZE> random_entropy{};
/// List of threads that are running with this process as their owner.
std::list<const Thread*> thread_list;
/// List of threads waiting for a condition variable
std::unordered_map<VAddr, std::list<std::shared_ptr<Thread>>> cond_var_threads;
/// Address of the top of the main thread's stack
VAddr main_thread_stack_top{};
/// Size of the main thread's stack
std::size_t main_thread_stack_size{};
/// Memory usage capacity for the process
std::size_t memory_usage_capacity{};
/// Process total image size
std::size_t image_size{};
/// Name of this process
std::string name;
/// System context
Core::System& system;
};
} // namespace Kernel