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kern: devirtualize KAutoObjectWithList::GetId()

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This commit is contained in:
Michael Scire 2021-10-24 17:00:05 -07:00
parent 3e4acc62f3
commit 8a661cee6e
8 changed files with 351 additions and 97 deletions
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3
libraries/libmesosphere/include/mesosphere.hpp
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@ -90,3 +90,6 @@
/* Main functionality. */
#include <mesosphere/kern_main.hpp>
/* Deferred includes. */
#include <mesosphere/kern_k_auto_object_impls.hpp>

27
libraries/libmesosphere/include/mesosphere/kern_k_auto_object.hpp
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@ -230,8 +230,6 @@ namespace ams::kern {
}
};
class KAutoObjectWithListContainer;
class KAutoObjectWithListBase : public KAutoObject {
private:
void *m_alignment_forcer_unused[0];
@ -243,6 +241,7 @@ namespace ams::kern {
class KAutoObjectWithList : public KAutoObjectWithListBase {
private:
template<typename>
friend class KAutoObjectWithListContainer;
private:
util::IntrusiveRedBlackTreeNode m_list_node;
@ -250,28 +249,8 @@ namespace ams::kern {
constexpr ALWAYS_INLINE KAutoObjectWithList(util::ConstantInitializeTag) : KAutoObjectWithListBase(util::ConstantInitialize), m_list_node(util::ConstantInitialize) { /* ... */ }
ALWAYS_INLINE explicit KAutoObjectWithList() { /* ... */ }
public:
using RedBlackKeyType = u64;
static constexpr ALWAYS_INLINE RedBlackKeyType GetRedBlackKey(const RedBlackKeyType &v) { return v; }
static constexpr ALWAYS_INLINE RedBlackKeyType GetRedBlackKey(const KAutoObjectWithList &v) { return v.GetId(); }
template<typename T> requires (std::same_as<T, KAutoObjectWithList> || std::same_as<T, RedBlackKeyType>)
static ALWAYS_INLINE int Compare(const T &lhs, const KAutoObjectWithList &rhs) {
const u64 lid = GetRedBlackKey(lhs);
const u64 rid = GetRedBlackKey(rhs);
if (lid < rid) {
return -1;
} else if (lid > rid) {
return 1;
} else {
return 0;
}
}
public:
virtual u64 GetId() const {
return reinterpret_cast<u64>(this);
}
/* NOTE: This is virtual in Nintendo's kernel. */
u64 GetId() const;
};
template<typename T> requires std::derived_from<T, KAutoObject>

166
libraries/libmesosphere/include/mesosphere/kern_k_auto_object_container.hpp
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@ -20,77 +20,129 @@
namespace ams::kern {
class KAutoObjectWithListContainer {
NON_COPYABLE(KAutoObjectWithListContainer);
NON_MOVEABLE(KAutoObjectWithListContainer);
public:
using ListType = util::IntrusiveRedBlackTreeMemberTraits<&KAutoObjectWithList::m_list_node>::TreeType<KAutoObjectWithList>;
public:
class ListAccessor : public KScopedLightLock {
private:
ListType &m_list;
public:
explicit ListAccessor(KAutoObjectWithListContainer *container) : KScopedLightLock(container->m_lock), m_list(container->m_object_list) { /* ... */ }
explicit ListAccessor(KAutoObjectWithListContainer &container) : KScopedLightLock(container.m_lock), m_list(container.m_object_list) { /* ... */ }
namespace impl {
ALWAYS_INLINE typename ListType::iterator begin() const {
return m_list.begin();
}
template<typename T>
struct GetAutoObjectWithListComparator;
ALWAYS_INLINE typename ListType::iterator end() const {
return m_list.end();
}
class KAutoObjectWithListContainerBase {
NON_COPYABLE(KAutoObjectWithListContainerBase);
NON_MOVEABLE(KAutoObjectWithListContainerBase);
protected:
template<typename ListType>
class ListAccessorImpl {
NON_COPYABLE(ListAccessorImpl);
NON_MOVEABLE(ListAccessorImpl);
private:
KScopedLightLock m_lk;
ListType &m_list;
public:
explicit ALWAYS_INLINE ListAccessorImpl(KAutoObjectWithListContainerBase *container, ListType &list) : m_lk(container->m_lock), m_list(list) { /* ... */ }
explicit ALWAYS_INLINE ListAccessorImpl(KAutoObjectWithListContainerBase &container, ListType &list) : m_lk(container.m_lock), m_list(list) { /* ... */ }
ALWAYS_INLINE typename ListType::iterator find(typename ListType::const_reference ref) const {
return m_list.find(ref);
}
ALWAYS_INLINE ~ListAccessorImpl() { /* ... */ }
ALWAYS_INLINE typename ListType::iterator find_key(typename ListType::const_key_reference ref) const {
return m_list.find_key(ref);
}
};
ALWAYS_INLINE typename ListType::iterator begin() const {
return m_list.begin();
}
friend class ListAccessor;
private:
KLightLock m_lock;
ListType m_object_list;
public:
constexpr KAutoObjectWithListContainer() : m_lock(), m_object_list() { MESOSPHERE_ASSERT_THIS(); }
ALWAYS_INLINE typename ListType::iterator end() const {
return m_list.end();
}
void Initialize() { MESOSPHERE_ASSERT_THIS(); }
void Finalize() { MESOSPHERE_ASSERT_THIS(); }
ALWAYS_INLINE typename ListType::iterator find(typename ListType::const_reference ref) const {
return m_list.find(ref);
}
void Register(KAutoObjectWithList *obj) {
MESOSPHERE_ASSERT_THIS();
ALWAYS_INLINE typename ListType::iterator find_key(typename ListType::const_key_reference ref) const {
return m_list.find_key(ref);
}
};
KScopedLightLock lk(m_lock);
template<typename ListType>
friend class ListAccessorImpl;
private:
KLightLock m_lock;
protected:
constexpr KAutoObjectWithListContainerBase() : m_lock() { /* ... */ }
m_object_list.insert(*obj);
}
ALWAYS_INLINE void InitializeImpl() { MESOSPHERE_ASSERT_THIS(); }
ALWAYS_INLINE void FinalizeImpl() { MESOSPHERE_ASSERT_THIS(); }
void Unregister(KAutoObjectWithList *obj) {
MESOSPHERE_ASSERT_THIS();
template<typename ListType>
void RegisterImpl(KAutoObjectWithList *obj, ListType &list) {
MESOSPHERE_ASSERT_THIS();
KScopedLightLock lk(m_lock);
KScopedLightLock lk(m_lock);
m_object_list.erase(m_object_list.iterator_to(*obj));
}
template<typename T> requires (std::derived_from<T, KAutoObjectWithList> && requires (const T &t) { { t.GetOwner() } -> std::convertible_to<const KProcess *>; })
size_t GetOwnedCount(const KProcess *owner) {
MESOSPHERE_ASSERT_THIS();
KScopedLightLock lk(m_lock);
size_t count = 0;
for (const auto &obj : m_object_list) {
if (const T * const derived = obj.DynamicCast<T *>(); derived != nullptr && derived->GetOwner() == owner) {
++count;
}
list.insert(*obj);
}
return count;
template<typename ListType>
void UnregisterImpl(KAutoObjectWithList *obj, ListType &list) {
MESOSPHERE_ASSERT_THIS();
KScopedLightLock lk(m_lock);
list.erase(list.iterator_to(*obj));
}
template<typename U, typename ListType>
size_t GetOwnedCountImpl(const KProcess *owner, ListType &list) {
MESOSPHERE_ASSERT_THIS();
KScopedLightLock lk(m_lock);
size_t count = 0;
for (const auto &obj : list) {
AMS_AUDIT(obj.DynamicCast<const U *>() != nullptr);
if (static_cast<const U &>(obj).GetOwner() == owner) {
++count;
}
}
return count;
}
};
struct DummyKAutoObjectWithListComparator {
static NOINLINE int Compare(KAutoObjectWithList &lhs, KAutoObjectWithList &rhs) {
AMS_ASSUME(false);
}
};
}
template<typename T>
class KAutoObjectWithListContainer : public impl::KAutoObjectWithListContainerBase {
private:
using Base = impl::KAutoObjectWithListContainerBase;
public:
class ListAccessor;
friend class ListAccessor;
template<typename Comparator>
using ListType = util::IntrusiveRedBlackTreeMemberTraits<&KAutoObjectWithList::m_list_node>::TreeType<Comparator>;
using DummyListType = ListType<impl::DummyKAutoObjectWithListComparator>;
private:
DummyListType m_dummy_object_list;
public:
constexpr ALWAYS_INLINE KAutoObjectWithListContainer() : Base(), m_dummy_object_list() { static_assert(std::derived_from<T, KAutoObjectWithList>); }
ALWAYS_INLINE void Initialize() { return this->InitializeImpl(); }
ALWAYS_INLINE void Finalize() { return this->FinalizeImpl(); }
void Register(T *obj);
void Unregister(T *obj);
private:
size_t GetOwnedCountChecked(const KProcess *owner);
public:
template<typename U> requires (std::same_as<U, T> && requires (const U &u) { { u.GetOwner() } -> std::convertible_to<const KProcess *>; })
ALWAYS_INLINE size_t GetOwnedCount(const KProcess *owner) {
return this->GetOwnedCountChecked(owner);
}
};

163
libraries/libmesosphere/include/mesosphere/kern_k_auto_object_impls.hpp Normal file
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@ -0,0 +1,163 @@
/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <mesosphere/kern_common.hpp>
#include <mesosphere/kern_k_class_token.hpp>
namespace ams::kern {
/* NOTE: This header is included after all other KAutoObjects. */
namespace impl {
template<typename T> requires std::derived_from<T, KAutoObject>
consteval bool IsAutoObjectInheritanceValidImpl() {
#define CLASS_TOKEN_HANDLER(CLASSNAME) \
if constexpr (std::same_as<T, CLASSNAME>) { \
if (T::GetStaticTypeObj().GetClassToken() != ::ams::kern::ClassToken<CLASSNAME>) { \
return false; \
} \
} else { \
if (T::GetStaticTypeObj().IsDerivedFrom(CLASSNAME::GetStaticTypeObj()) != std::derived_from<T, CLASSNAME>) { \
return false; \
} \
}
FOR_EACH_K_CLASS_TOKEN_OBJECT_TYPE(CLASS_TOKEN_HANDLER)
#undef CLASS_TOKEN_HANDLER
return true;
}
consteval bool IsEveryAutoObjectInheritanceValid() {
#define CLASS_TOKEN_HANDLER(CLASSNAME) if (!IsAutoObjectInheritanceValidImpl<CLASSNAME>()) { return false; }
FOR_EACH_K_CLASS_TOKEN_OBJECT_TYPE(CLASS_TOKEN_HANDLER)
#undef CLASS_TOKEN_HANDLER
return true;
}
static_assert(IsEveryAutoObjectInheritanceValid());
template<typename T>
concept IsAutoObjectWithSpecializedGetId = std::derived_from<T, KAutoObjectWithList> && requires (const T &t, const KAutoObjectWithList &l) {
{ t.GetIdImpl() } -> std::same_as<decltype(l.GetId())>;
};
template<typename T>
struct AutoObjectWithListComparatorImpl {
using RedBlackKeyType = u64;
static ALWAYS_INLINE RedBlackKeyType GetRedBlackKey(const RedBlackKeyType &v) { return v; }
static ALWAYS_INLINE RedBlackKeyType GetRedBlackKey(const KAutoObjectWithList &v) {
if constexpr (IsAutoObjectWithSpecializedGetId<T>) {
return static_cast<const T &>(v).GetIdImpl();
} else {
return reinterpret_cast<u64>(std::addressof(v));
}
}
template<typename U> requires (std::same_as<U, KAutoObjectWithList> || std::same_as<U, RedBlackKeyType>)
static ALWAYS_INLINE int Compare(const U &lhs, const KAutoObjectWithList &rhs) {
const u64 lid = GetRedBlackKey(lhs);
const u64 rid = GetRedBlackKey(rhs);
if (lid < rid) {
return -1;
} else if (lid > rid) {
return 1;
} else {
return 0;
}
}
};
template<typename T>
using AutoObjectWithListComparator = AutoObjectWithListComparatorImpl<typename std::conditional<IsAutoObjectWithSpecializedGetId<T>, T, KAutoObjectWithList>::type>;
template<typename T>
using TrueObjectContainerListType = typename KAutoObjectWithListContainer<T>::ListType<AutoObjectWithListComparator<T>>;
template<typename T>
ALWAYS_INLINE TrueObjectContainerListType<T> &GetTrueObjectContainerList(typename KAutoObjectWithListContainer<T>::DummyListType &l) {
static_assert(alignof(l) == alignof(impl::TrueObjectContainerListType<T>));
static_assert(sizeof(l) == sizeof(impl::TrueObjectContainerListType<T>));
return *reinterpret_cast<TrueObjectContainerListType<T> *>(std::addressof(l));
}
}
ALWAYS_INLINE void KAutoObject::ScheduleDestruction() {
MESOSPHERE_ASSERT_THIS();
/* Set our object to destroy. */
m_next_closed_object = GetCurrentThread().GetClosedObject();
/* Set ourselves as the thread's next object to destroy. */
GetCurrentThread().SetClosedObject(this);
}
template<typename T>
class KAutoObjectWithListContainer<T>::ListAccessor : public impl::KAutoObjectWithListContainerBase::ListAccessorImpl<impl::TrueObjectContainerListType<T>> {
NON_COPYABLE(ListAccessor);
NON_MOVEABLE(ListAccessor);
private:
using BaseListAccessor = impl::KAutoObjectWithListContainerBase::ListAccessorImpl<impl::TrueObjectContainerListType<T>>;
public:
explicit ALWAYS_INLINE ListAccessor(KAutoObjectWithListContainer *container) : BaseListAccessor(container, impl::GetTrueObjectContainerList<T>(container->m_dummy_object_list)) { /* ... */ }
explicit ALWAYS_INLINE ListAccessor(KAutoObjectWithListContainer &container) : BaseListAccessor(container, impl::GetTrueObjectContainerList<T>(container.m_dummy_object_list)) { /* ... */ }
ALWAYS_INLINE ~ListAccessor() { /* ... */ }
};
template<typename T>
ALWAYS_INLINE void KAutoObjectWithListContainer<T>::Register(T *obj) {
return this->RegisterImpl(obj, impl::GetTrueObjectContainerList<T>(m_dummy_object_list));
}
template<typename T>
ALWAYS_INLINE void KAutoObjectWithListContainer<T>::Unregister(T *obj) {
return this->UnregisterImpl(obj, impl::GetTrueObjectContainerList<T>(m_dummy_object_list));
}
template<typename T>
ALWAYS_INLINE size_t KAutoObjectWithListContainer<T>::GetOwnedCountChecked(const KProcess *owner) {
return this->GetOwnedCountImpl<T>(owner, impl::GetTrueObjectContainerList<T>(m_dummy_object_list));
}
inline u64 KAutoObjectWithList::GetId() const {
#define CLASS_TOKEN_HANDLER(CLASSNAME) \
if constexpr (impl::IsAutoObjectWithSpecializedGetId<CLASSNAME>) { \
if (const CLASSNAME * const derived = this->DynamicCast<const CLASSNAME *>(); derived != nullptr) { \
return []<typename T>(const T * const t_derived) ALWAYS_INLINE_LAMBDA -> u64 { \
static_assert(std::same_as<T, CLASSNAME>); \
if constexpr (impl::IsAutoObjectWithSpecializedGetId<CLASSNAME>) { \
return impl::AutoObjectWithListComparator<CLASSNAME>::GetRedBlackKey(*t_derived); \
} else { \
AMS_ASSUME(false); \
} \
}(derived); \
} \
}
FOR_EACH_K_CLASS_TOKEN_OBJECT_TYPE(CLASS_TOKEN_HANDLER)
#undef CLASS_TOKEN_HANDLER
return impl::AutoObjectWithListComparator<KAutoObjectWithList>::GetRedBlackKey(*this);
}
}

65
libraries/libmesosphere/include/mesosphere/kern_k_class_token.hpp
View File

@ -21,6 +21,35 @@ namespace ams::kern {
class KAutoObject;
#define FOR_EACH_K_CLASS_TOKEN_OBJECT_TYPE(HANDLER) \
HANDLER(KAutoObject) \
\
HANDLER(KSynchronizationObject) \
HANDLER(KReadableEvent) \
\
HANDLER(KInterruptEvent) \
HANDLER(KDebug) \
HANDLER(KThread) \
HANDLER(KServerPort) \
HANDLER(KServerSession) \
HANDLER(KClientPort) \
HANDLER(KClientSession) \
HANDLER(KProcess) \
HANDLER(KResourceLimit) \
HANDLER(KLightSession) \
HANDLER(KPort) \
HANDLER(KSession) \
HANDLER(KSharedMemory) \
HANDLER(KEvent) \
HANDLER(KLightClientSession) \
HANDLER(KLightServerSession) \
HANDLER(KTransferMemory) \
HANDLER(KDeviceAddressSpace) \
HANDLER(KSessionRequest) \
HANDLER(KCodeMemory) \
HANDLER(KIoPool) \
HANDLER(KIoRegion)
class KClassTokenGenerator {
public:
using TokenBaseType = u16;
@ -113,8 +142,11 @@ namespace ams::kern {
KIoPool,
KIoRegion,
FinalClassesLast,
FinalClassesEnd = FinalClassesStart + NumFinalClasses,
};
static_assert(ObjectType::FinalClassesLast <= ObjectType::FinalClassesEnd);
template<typename T>
static constexpr inline TokenBaseType ClassToken = GetClassToken<T>();
@ -125,4 +157,37 @@ namespace ams::kern {
template<typename T>
static constexpr inline ClassTokenType ClassToken = KClassTokenGenerator::ClassToken<T>;
namespace impl {
consteval bool IsKClassTokenGeneratorForEachMacroValid() {
auto IsObjectTypeIncludedByMacro = [](KClassTokenGenerator::ObjectType object_type) -> bool {
#define CLASS_TOKEN_HANDLER(CLASSNAME) if (object_type == KClassTokenGenerator::ObjectType::CLASSNAME) { return true; }
FOR_EACH_K_CLASS_TOKEN_OBJECT_TYPE(CLASS_TOKEN_HANDLER)
#undef CLASS_TOKEN_HANDLER
return false;
};
if (!IsObjectTypeIncludedByMacro(KClassTokenGenerator::ObjectType::KAutoObject)) {
return false;
}
for (auto base = util::ToUnderlying(KClassTokenGenerator::ObjectType::BaseClassesStart); base < util::ToUnderlying(KClassTokenGenerator::ObjectType::BaseClassesEnd); ++base) {
if (!IsObjectTypeIncludedByMacro(static_cast<KClassTokenGenerator::ObjectType>(base))) {
return false;
}
}
for (auto fin = util::ToUnderlying(KClassTokenGenerator::ObjectType::FinalClassesStart); fin < util::ToUnderlying(KClassTokenGenerator::ObjectType::FinalClassesLast); ++fin) {
if (!IsObjectTypeIncludedByMacro(static_cast<KClassTokenGenerator::ObjectType>(fin))) {
return false;
}
}
return true;
}
static_assert(IsKClassTokenGeneratorForEachMacroValid());
}
}

3
libraries/libmesosphere/include/mesosphere/kern_k_process.hpp
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@ -390,7 +390,8 @@ namespace ams::kern {
void Finalize();
virtual u64 GetId() const override final { return this->GetProcessId(); }
ALWAYS_INLINE u64 GetIdImpl() const { return this->GetProcessId(); }
ALWAYS_INLINE u64 GetId() const { return this->GetIdImpl(); }
virtual bool IsSignaled() const override {
MESOSPHERE_ASSERT_THIS();

13
libraries/libmesosphere/include/mesosphere/kern_k_thread.hpp
View File

@ -610,7 +610,8 @@ namespace ams::kern {
size_t GetKernelStackUsage() const;
public:
/* Overridden parent functions. */
virtual u64 GetId() const override final { return this->GetThreadId(); }
ALWAYS_INLINE u64 GetIdImpl() const { return this->GetThreadId(); }
ALWAYS_INLINE u64 GetId() const { return this->GetIdImpl(); }
bool IsInitialized() const { return m_initialized; }
uintptr_t GetPostDestroyArgument() const { return reinterpret_cast<uintptr_t>(m_parent) | (m_resource_limit_release_hint ? 1 : 0); }
@ -664,16 +665,6 @@ namespace ams::kern {
return GetCurrentThread().GetCurrentCore();
}
ALWAYS_INLINE void KAutoObject::ScheduleDestruction() {
MESOSPHERE_ASSERT_THIS();
/* Set our object to destroy. */
m_next_closed_object = GetCurrentThread().GetClosedObject();
/* Set ourselves as the thread's next object to destroy. */
GetCurrentThread().SetClosedObject(this);
}
ALWAYS_INLINE void KTimerTask::OnTimer() {
static_cast<KThread *>(this)->OnTimer();
}

8
libraries/libmesosphere/include/mesosphere/kern_slab_helpers.hpp
View File

@ -68,7 +68,7 @@ namespace ams::kern {
class KAutoObjectWithSlabHeapAndContainer : public Base {
private:
static constinit inline KSlabHeap<Derived, SupportDynamicExpansion> s_slab_heap;
static constinit inline KAutoObjectWithListContainer s_container;
static constinit inline KAutoObjectWithListContainer<Derived> s_container;
private:
static ALWAYS_INLINE Derived *Allocate() {
return s_slab_heap.Allocate();
@ -78,9 +78,9 @@ namespace ams::kern {
s_slab_heap.Free(obj);
}
public:
class ListAccessor : public KAutoObjectWithListContainer::ListAccessor {
class ListAccessor : public KAutoObjectWithListContainer<Derived>::ListAccessor {
public:
ALWAYS_INLINE ListAccessor() : KAutoObjectWithListContainer::ListAccessor(s_container) { /* ... */ }
ALWAYS_INLINE ListAccessor() : KAutoObjectWithListContainer<Derived>::ListAccessor(s_container) { /* ... */ }
ALWAYS_INLINE ~ListAccessor() { /* ... */ }
};
private:
@ -111,7 +111,7 @@ namespace ams::kern {
Derived * const derived = static_cast<Derived *>(this);
if (IsInitialized(derived)) {
s_container.Unregister(this);
s_container.Unregister(derived);
const uintptr_t arg = GetPostDestroyArgument(derived);
derived->Finalize();
Free(derived);