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Merge pull request #2199 from lioncash/arbiter 

kernel/address_arbiter: Convert the address arbiter into a class
This commit is contained in:
bunnei 2019-03-06 15:55:56 -05:00 committed by GitHub
parent e9b05e86b9 c161389a0f
commit 75b417489a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 242 additions and 170 deletions
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5
src/core/core.cpp
View File

@ -78,6 +78,7 @@ FileSys::VirtualFile GetGameFileFromPath(const FileSys::VirtualFilesystem& vfs,
return vfs->OpenFile(path, FileSys::Mode::Read);
}
struct System::Impl {
explicit Impl(System& system) : kernel{system} {}
Cpu& CurrentCpuCore() {
return cpu_core_manager.GetCurrentCore();
@ -95,7 +96,7 @@ struct System::Impl {
LOG_DEBUG(HW_Memory, "initialized OK");
core_timing.Initialize();
kernel.Initialize(core_timing);
kernel.Initialize();
const auto current_time = std::chrono::duration_cast<std::chrono::seconds>(
std::chrono::system_clock::now().time_since_epoch());
@ -265,7 +266,7 @@ struct System::Impl {
Core::FrameLimiter frame_limiter;
};
System::System() : impl{std::make_unique<Impl>()} {}
System::System() : impl{std::make_unique<Impl>(*this)} {}
System::~System() = default;
Cpu& System::CurrentCpuCore() {

249
src/core/hle/kernel/address_arbiter.cpp
View File

@ -9,6 +9,7 @@
#include "common/common_types.h"
#include "core/core.h"
#include "core/core_cpu.h"
#include "core/hle/kernel/address_arbiter.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/object.h"
#include "core/hle/kernel/process.h"
@ -17,33 +18,145 @@
#include "core/hle/result.h"
#include "core/memory.h"
namespace Kernel::AddressArbiter {
namespace Kernel {
namespace {
// Wake up num_to_wake (or all) threads in a vector.
void WakeThreads(const std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) {
// Only process up to 'target' threads, unless 'target' is <= 0, in which case process
// them all.
std::size_t last = waiting_threads.size();
if (num_to_wake > 0) {
last = num_to_wake;
}
// Performs actual address waiting logic.
static ResultCode WaitForAddress(VAddr address, s64 timeout) {
SharedPtr<Thread> current_thread = GetCurrentThread();
// Signal the waiting threads.
for (std::size_t i = 0; i < last; i++) {
ASSERT(waiting_threads[i]->GetStatus() == ThreadStatus::WaitArb);
waiting_threads[i]->SetWaitSynchronizationResult(RESULT_SUCCESS);
waiting_threads[i]->SetArbiterWaitAddress(0);
waiting_threads[i]->ResumeFromWait();
}
}
} // Anonymous namespace
AddressArbiter::AddressArbiter(Core::System& system) : system{system} {}
AddressArbiter::~AddressArbiter() = default;
ResultCode AddressArbiter::SignalToAddress(VAddr address, s32 num_to_wake) {
const std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address);
WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS;
}
ResultCode AddressArbiter::IncrementAndSignalToAddressIfEqual(VAddr address, s32 value,
s32 num_to_wake) {
// Ensure that we can write to the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
if (static_cast<s32>(Memory::Read32(address)) != value) {
return ERR_INVALID_STATE;
}
Memory::Write32(address, static_cast<u32>(value + 1));
return SignalToAddress(address, num_to_wake);
}
ResultCode AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
s32 num_to_wake) {
// Ensure that we can write to the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
// Get threads waiting on the address.
const std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address);
// Determine the modified value depending on the waiting count.
s32 updated_value;
if (waiting_threads.empty()) {
updated_value = value - 1;
} else if (num_to_wake <= 0 || waiting_threads.size() <= static_cast<u32>(num_to_wake)) {
updated_value = value + 1;
} else {
updated_value = value;
}
if (static_cast<s32>(Memory::Read32(address)) != value) {
return ERR_INVALID_STATE;
}
Memory::Write32(address, static_cast<u32>(updated_value));
WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS;
}
ResultCode AddressArbiter::WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
bool should_decrement) {
// Ensure that we can read the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
const s32 cur_value = static_cast<s32>(Memory::Read32(address));
if (cur_value >= value) {
return ERR_INVALID_STATE;
}
if (should_decrement) {
Memory::Write32(address, static_cast<u32>(cur_value - 1));
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddress(address, timeout);
}
ResultCode AddressArbiter::WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
// Ensure that we can read the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
// Only wait for the address if equal.
if (static_cast<s32>(Memory::Read32(address)) != value) {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddress(address, timeout);
}
ResultCode AddressArbiter::WaitForAddress(VAddr address, s64 timeout) {
SharedPtr<Thread> current_thread = system.CurrentScheduler().GetCurrentThread();
current_thread->SetArbiterWaitAddress(address);
current_thread->SetStatus(ThreadStatus::WaitArb);
current_thread->InvalidateWakeupCallback();
current_thread->WakeAfterDelay(timeout);
Core::System::GetInstance().CpuCore(current_thread->GetProcessorID()).PrepareReschedule();
system.CpuCore(current_thread->GetProcessorID()).PrepareReschedule();
return RESULT_TIMEOUT;
}
// Gets the threads waiting on an address.
static std::vector<SharedPtr<Thread>> GetThreadsWaitingOnAddress(VAddr address) {
const auto RetrieveWaitingThreads = [](std::size_t core_index,
std::vector<SharedPtr<Thread>> AddressArbiter::GetThreadsWaitingOnAddress(VAddr address) const {
const auto RetrieveWaitingThreads = [this](std::size_t core_index,
std::vector<SharedPtr<Thread>>& waiting_threads,
VAddr arb_addr) {
const auto& scheduler = Core::System::GetInstance().Scheduler(core_index);
const auto& scheduler = system.Scheduler(core_index);
const auto& thread_list = scheduler.GetThreadList();
for (const auto& thread : thread_list) {
if (thread->GetArbiterWaitAddress() == arb_addr)
if (thread->GetArbiterWaitAddress() == arb_addr) {
waiting_threads.push_back(thread);
}
}
};
// Retrieve all threads that are waiting for this address.
@ -61,118 +174,4 @@ static std::vector<SharedPtr<Thread>> GetThreadsWaitingOnAddress(VAddr address)
return threads;
}
// Wake up num_to_wake (or all) threads in a vector.
static void WakeThreads(std::vector<SharedPtr<Thread>>& waiting_threads, s32 num_to_wake) {
// Only process up to 'target' threads, unless 'target' is <= 0, in which case process
// them all.
std::size_t last = waiting_threads.size();
if (num_to_wake > 0)
last = num_to_wake;
// Signal the waiting threads.
for (std::size_t i = 0; i < last; i++) {
ASSERT(waiting_threads[i]->GetStatus() == ThreadStatus::WaitArb);
waiting_threads[i]->SetWaitSynchronizationResult(RESULT_SUCCESS);
waiting_threads[i]->SetArbiterWaitAddress(0);
waiting_threads[i]->ResumeFromWait();
}
}
// Signals an address being waited on.
ResultCode SignalToAddress(VAddr address, s32 num_to_wake) {
std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address);
WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS;
}
// Signals an address being waited on and increments its value if equal to the value argument.
ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake) {
// Ensure that we can write to the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
if (static_cast<s32>(Memory::Read32(address)) == value) {
Memory::Write32(address, static_cast<u32>(value + 1));
} else {
return ERR_INVALID_STATE;
}
return SignalToAddress(address, num_to_wake);
}
// Signals an address being waited on and modifies its value based on waiting thread count if equal
// to the value argument.
ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
s32 num_to_wake) {
// Ensure that we can write to the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
// Get threads waiting on the address.
std::vector<SharedPtr<Thread>> waiting_threads = GetThreadsWaitingOnAddress(address);
// Determine the modified value depending on the waiting count.
s32 updated_value;
if (waiting_threads.empty()) {
updated_value = value - 1;
} else if (num_to_wake <= 0 || waiting_threads.size() <= static_cast<u32>(num_to_wake)) {
updated_value = value + 1;
} else {
updated_value = value;
}
if (static_cast<s32>(Memory::Read32(address)) == value) {
Memory::Write32(address, static_cast<u32>(updated_value));
} else {
return ERR_INVALID_STATE;
}
WakeThreads(waiting_threads, num_to_wake);
return RESULT_SUCCESS;
}
// Waits on an address if the value passed is less than the argument value, optionally decrementing.
ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement) {
// Ensure that we can read the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
s32 cur_value = static_cast<s32>(Memory::Read32(address));
if (cur_value < value) {
if (should_decrement) {
Memory::Write32(address, static_cast<u32>(cur_value - 1));
}
} else {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddress(address, timeout);
}
// Waits on an address if the value passed is equal to the argument value.
ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout) {
// Ensure that we can read the address.
if (!Memory::IsValidVirtualAddress(address)) {
return ERR_INVALID_ADDRESS_STATE;
}
// Only wait for the address if equal.
if (static_cast<s32>(Memory::Read32(address)) != value) {
return ERR_INVALID_STATE;
}
// Short-circuit without rescheduling, if timeout is zero.
if (timeout == 0) {
return RESULT_TIMEOUT;
}
return WaitForAddress(address, timeout);
}
} // namespace Kernel::AddressArbiter
} // namespace Kernel

52
src/core/hle/kernel/address_arbiter.h
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@ -5,11 +5,20 @@
#pragma once
#include "common/common_types.h"
#include "core/hle/kernel/address_arbiter.h"
union ResultCode;
namespace Kernel::AddressArbiter {
namespace Core {
class System;
}
namespace Kernel {
class Thread;
class AddressArbiter {
public:
enum class ArbitrationType {
WaitIfLessThan = 0,
DecrementAndWaitIfLessThan = 1,
@ -22,11 +31,42 @@ enum class SignalType {
ModifyByWaitingCountAndSignalIfEqual = 2,
};
ResultCode SignalToAddress(VAddr address, s32 num_to_wake);
ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
explicit AddressArbiter(Core::System& system);
~AddressArbiter();
ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout, bool should_decrement);
AddressArbiter(const AddressArbiter&) = delete;
AddressArbiter& operator=(const AddressArbiter&) = delete;
AddressArbiter(AddressArbiter&&) = default;
AddressArbiter& operator=(AddressArbiter&&) = delete;
/// Signals an address being waited on.
ResultCode SignalToAddress(VAddr address, s32 num_to_wake);
/// Signals an address being waited on and increments its value if equal to the value argument.
ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);
/// Signals an address being waited on and modifies its value based on waiting thread count if
/// equal to the value argument.
ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
s32 num_to_wake);
/// Waits on an address if the value passed is less than the argument value,
/// optionally decrementing.
ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
bool should_decrement);
/// Waits on an address if the value passed is equal to the argument value.
ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout);
} // namespace Kernel::AddressArbiter
private:
// Waits on the given address with a timeout in nanoseconds
ResultCode WaitForAddress(VAddr address, s64 timeout);
// Gets the threads waiting on an address.
std::vector<SharedPtr<Thread>> GetThreadsWaitingOnAddress(VAddr address) const;
Core::System& system;
};
} // namespace Kernel

30
src/core/hle/kernel/kernel.cpp
View File

@ -12,6 +12,7 @@
#include "core/core.h"
#include "core/core_timing.h"
#include "core/hle/kernel/address_arbiter.h"
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/kernel.h"
@ -86,11 +87,13 @@ static void ThreadWakeupCallback(u64 thread_handle, [[maybe_unused]] int cycles_
}
struct KernelCore::Impl {
void Initialize(KernelCore& kernel, Core::Timing::CoreTiming& core_timing) {
explicit Impl(Core::System& system) : address_arbiter{system}, system{system} {}
void Initialize(KernelCore& kernel) {
Shutdown();
InitializeSystemResourceLimit(kernel);
InitializeThreads(core_timing);
InitializeThreads();
}
void Shutdown() {
@ -122,9 +125,9 @@ struct KernelCore::Impl {
ASSERT(system_resource_limit->SetLimitValue(ResourceType::Sessions, 900).IsSuccess());
}
void InitializeThreads(Core::Timing::CoreTiming& core_timing) {
void InitializeThreads() {
thread_wakeup_event_type =
core_timing.RegisterEvent("ThreadWakeupCallback", ThreadWakeupCallback);
system.CoreTiming().RegisterEvent("ThreadWakeupCallback", ThreadWakeupCallback);
}
std::atomic<u32> next_object_id{0};
@ -135,6 +138,8 @@ struct KernelCore::Impl {
std::vector<SharedPtr<Process>> process_list;
Process* current_process = nullptr;
Kernel::AddressArbiter address_arbiter;
SharedPtr<ResourceLimit> system_resource_limit;
Core::Timing::EventType* thread_wakeup_event_type = nullptr;
@ -145,15 +150,18 @@ struct KernelCore::Impl {
/// Map of named ports managed by the kernel, which can be retrieved using
/// the ConnectToPort SVC.
NamedPortTable named_ports;
// System context
Core::System& system;
};
KernelCore::KernelCore() : impl{std::make_unique<Impl>()} {}
KernelCore::KernelCore(Core::System& system) : impl{std::make_unique<Impl>(system)} {}
KernelCore::~KernelCore() {
Shutdown();
}
void KernelCore::Initialize(Core::Timing::CoreTiming& core_timing) {
impl->Initialize(*this, core_timing);
void KernelCore::Initialize() {
impl->Initialize(*this);
}
void KernelCore::Shutdown() {
@ -184,6 +192,14 @@ const Process* KernelCore::CurrentProcess() const {
return impl->current_process;
}
AddressArbiter& KernelCore::AddressArbiter() {
return impl->address_arbiter;
}
const AddressArbiter& KernelCore::AddressArbiter() const {
return impl->address_arbiter;
}
void KernelCore::AddNamedPort(std::string name, SharedPtr<ClientPort> port) {
impl->named_ports.emplace(std::move(name), std::move(port));
}

26
src/core/hle/kernel/kernel.h
View File

@ -11,6 +11,10 @@
template <typename T>
class ResultVal;
namespace Core {
class System;
}
namespace Core::Timing {
class CoreTiming;
struct EventType;
@ -18,6 +22,7 @@ struct EventType;
namespace Kernel {
class AddressArbiter;
class ClientPort;
class HandleTable;
class Process;
@ -30,7 +35,14 @@ private:
using NamedPortTable = std::unordered_map<std::string, SharedPtr<ClientPort>>;
public:
KernelCore();
/// Constructs an instance of the kernel using the given System
/// instance as a context for any necessary system-related state,
/// such as threads, CPU core state, etc.
///
/// @post After execution of the constructor, the provided System
/// object *must* outlive the kernel instance itself.
///
explicit KernelCore(Core::System& system);
~KernelCore();
KernelCore(const KernelCore&) = delete;
@ -40,11 +52,7 @@ public:
KernelCore& operator=(KernelCore&&) = delete;
/// Resets the kernel to a clean slate for use.
///
/// @param core_timing CoreTiming instance used to create any necessary
/// kernel-specific callback events.
///
void Initialize(Core::Timing::CoreTiming& core_timing);
void Initialize();
/// Clears all resources in use by the kernel instance.
void Shutdown();
@ -67,6 +75,12 @@ public:
/// Retrieves a const pointer to the current process.
const Process* CurrentProcess() const;
/// Provides a reference to the kernel's address arbiter.
Kernel::AddressArbiter& AddressArbiter();
/// Provides a const reference to the kernel's address arbiter.
const Kernel::AddressArbiter& AddressArbiter() const;
/// Adds a port to the named port table
void AddNamedPort(std::string name, SharedPtr<ClientPort> port);

14
src/core/hle/kernel/svc.cpp
View File

@ -1478,13 +1478,14 @@ static ResultCode WaitForAddress(VAddr address, u32 type, s32 value, s64 timeout
return ERR_INVALID_ADDRESS;
}
auto& address_arbiter = Core::System::GetInstance().Kernel().AddressArbiter();
switch (static_cast<AddressArbiter::ArbitrationType>(type)) {
case AddressArbiter::ArbitrationType::WaitIfLessThan:
return AddressArbiter::WaitForAddressIfLessThan(address, value, timeout, false);
return address_arbiter.WaitForAddressIfLessThan(address, value, timeout, false);
case AddressArbiter::ArbitrationType::DecrementAndWaitIfLessThan:
return AddressArbiter::WaitForAddressIfLessThan(address, value, timeout, true);
return address_arbiter.WaitForAddressIfLessThan(address, value, timeout, true);
case AddressArbiter::ArbitrationType::WaitIfEqual:
return AddressArbiter::WaitForAddressIfEqual(address, value, timeout);
return address_arbiter.WaitForAddressIfEqual(address, value, timeout);
default:
LOG_ERROR(Kernel_SVC,
"Invalid arbitration type, expected WaitIfLessThan, DecrementAndWaitIfLessThan "
@ -1509,13 +1510,14 @@ static ResultCode SignalToAddress(VAddr address, u32 type, s32 value, s32 num_to
return ERR_INVALID_ADDRESS;
}
auto& address_arbiter = Core::System::GetInstance().Kernel().AddressArbiter();
switch (static_cast<AddressArbiter::SignalType>(type)) {
case AddressArbiter::SignalType::Signal:
return AddressArbiter::SignalToAddress(address, num_to_wake);
return address_arbiter.SignalToAddress(address, num_to_wake);
case AddressArbiter::SignalType::IncrementAndSignalIfEqual:
return AddressArbiter::IncrementAndSignalToAddressIfEqual(address, value, num_to_wake);
return address_arbiter.IncrementAndSignalToAddressIfEqual(address, value, num_to_wake);
case AddressArbiter::SignalType::ModifyByWaitingCountAndSignalIfEqual:
return AddressArbiter::ModifyByWaitingCountAndSignalToAddressIfEqual(address, value,
return address_arbiter.ModifyByWaitingCountAndSignalToAddressIfEqual(address, value,
num_to_wake);
default:
LOG_ERROR(Kernel_SVC,

6
src/tests/core/arm/arm_test_common.cpp
View File

@ -13,11 +13,11 @@
namespace ArmTests {
TestEnvironment::TestEnvironment(bool mutable_memory_)
: mutable_memory(mutable_memory_), test_memory(std::make_shared<TestMemory>(this)) {
: mutable_memory(mutable_memory_),
test_memory(std::make_shared<TestMemory>(this)), kernel{Core::System::GetInstance()} {
auto process = Kernel::Process::Create(kernel, "");
kernel.MakeCurrentProcess(process.get());
page_table = &Core::CurrentProcess()->VMManager().page_table;
page_table = &process->VMManager().page_table;
std::fill(page_table->pointers.begin(), page_table->pointers.end(), nullptr);
page_table->special_regions.clear();