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kern: delete KWritableEvent, devirtualize KReadableEvent Signal/Clear

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This commit is contained in:
Michael Scire 2021-09-17 15:31:25 -07:00
parent fe03791d11
commit e10a7e7d65
15 changed files with 81 additions and 149 deletions
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1
libraries/libmesosphere/include/mesosphere/kern_k_class_token.hpp
View file

@ -104,7 +104,6 @@ namespace ams::kern {
KSession,
KSharedMemory,
KEvent,
KWritableEvent,
KLightClientSession,
KLightServerSession,
KTransferMemory,

3
libraries/libmesosphere/include/mesosphere/kern_k_client_session.hpp
View file

@ -20,6 +20,7 @@
namespace ams::kern {
class KSession;
class KEvent;
class KClientSession final : public KAutoObject {
MESOSPHERE_AUTOOBJECT_TRAITS(KClientSession, KAutoObject);
@ -39,7 +40,7 @@ namespace ams::kern {
constexpr KSession *GetParent() const { return m_parent; }
Result SendSyncRequest(uintptr_t address, size_t size);
Result SendAsyncRequest(KWritableEvent *event, uintptr_t address, size_t size);
Result SendAsyncRequest(KEvent *event, uintptr_t address, size_t size);
void OnServerClosed();
};

11
libraries/libmesosphere/include/mesosphere/kern_k_event.hpp
View file

@ -18,7 +18,6 @@
#include <mesosphere/kern_k_auto_object.hpp>
#include <mesosphere/kern_slab_helpers.hpp>
#include <mesosphere/kern_k_readable_event.hpp>
#include <mesosphere/kern_k_writable_event.hpp>
namespace ams::kern {
@ -26,12 +25,12 @@ namespace ams::kern {
MESOSPHERE_AUTOOBJECT_TRAITS(KEvent, KAutoObject);
private:
KReadableEvent m_readable_event;
KWritableEvent m_writable_event;
KProcess *m_owner;
bool m_initialized;
bool m_readable_event_destroyed;
public:
constexpr KEvent()
: m_readable_event(), m_writable_event(), m_owner(), m_initialized()
: m_readable_event(), m_owner(), m_initialized(), m_readable_event_destroyed()
{
/* ... */
}
@ -47,7 +46,11 @@ namespace ams::kern {
virtual KProcess *GetOwner() const override { return m_owner; }
KReadableEvent &GetReadableEvent() { return m_readable_event; }
KWritableEvent &GetWritableEvent() { return m_writable_event; }
Result Signal();
Result Clear();
ALWAYS_INLINE void OnReadableEventDestroyed() { m_readable_event_destroyed = true; }
};
}

12
libraries/libmesosphere/include/mesosphere/kern_k_readable_event.hpp
View file

@ -29,19 +29,15 @@ namespace ams::kern {
public:
constexpr explicit KReadableEvent() : KSynchronizationObject(), m_is_signaled(), m_parent() { MESOSPHERE_ASSERT_THIS(); }
constexpr void Initialize(KEvent *parent) {
MESOSPHERE_ASSERT_THIS();
m_is_signaled = false;
m_parent = parent;
}
void Initialize(KEvent *parent);
constexpr KEvent *GetParent() const { return m_parent; }
Result Signal();
Result Clear();
virtual bool IsSignaled() const override;
virtual void Destroy() override;
virtual Result Signal();
virtual Result Clear();
virtual Result Reset();
};

8
libraries/libmesosphere/include/mesosphere/kern_k_session_request.hpp
View file

@ -17,7 +17,7 @@
#include <mesosphere/kern_common.hpp>
#include <mesosphere/kern_k_auto_object.hpp>
#include <mesosphere/kern_slab_helpers.hpp>
#include <mesosphere/kern_k_writable_event.hpp>
#include <mesosphere/kern_k_event.hpp>
#include <mesosphere/kern_k_thread.hpp>
#include <mesosphere/kern_k_process.hpp>
#include <mesosphere/kern_k_memory_block.hpp>
@ -126,7 +126,7 @@ namespace ams::kern {
SessionMappings m_mappings;
KThread *m_thread;
KProcess *m_server;
KWritableEvent *m_event;
KEvent *m_event;
uintptr_t m_address;
size_t m_size;
public:
@ -145,7 +145,7 @@ namespace ams::kern {
KSessionRequest::Free(this);
}
void Initialize(KWritableEvent *event, uintptr_t address, size_t size) {
void Initialize(KEvent *event, uintptr_t address, size_t size) {
m_mappings.Initialize();
m_thread = std::addressof(GetCurrentThread());
@ -176,7 +176,7 @@ namespace ams::kern {
static void PostDestroy(uintptr_t arg) { MESOSPHERE_UNUSED(arg); /* ... */ }
constexpr ALWAYS_INLINE KThread *GetThread() const { return m_thread; }
constexpr ALWAYS_INLINE KWritableEvent *GetEvent() const { return m_event; }
constexpr ALWAYS_INLINE KEvent *GetEvent() const { return m_event; }
constexpr ALWAYS_INLINE uintptr_t GetAddress() const { return m_address; }
constexpr ALWAYS_INLINE size_t GetSize() const { return m_size; }
constexpr ALWAYS_INLINE KProcess *GetServerProcess() const { return m_server; }

43
libraries/libmesosphere/include/mesosphere/kern_k_writable_event.hpp
View file

@ -1,43 +0,0 @@
/*
* Copyright (c) 2018-2020 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_auto_object.hpp>
#include <mesosphere/kern_slab_helpers.hpp>
namespace ams::kern {
class KEvent;
class KWritableEvent final : public KAutoObjectWithSlabHeapAndContainer<KWritableEvent, KAutoObjectWithList> {
MESOSPHERE_AUTOOBJECT_TRAITS(KWritableEvent, KAutoObject);
private:
KEvent *m_parent;
public:
constexpr explicit KWritableEvent() : m_parent(nullptr) { /* ... */ }
virtual void Destroy() override;
static void PostDestroy(uintptr_t arg) { MESOSPHERE_UNUSED(arg); /* ... */ }
void Initialize(KEvent *p);
Result Signal();
Result Clear();
constexpr KEvent *GetParent() const { return m_parent; }
};
}

27
libraries/libmesosphere/source/kern_k_class_token.cpp
View file

@ -37,13 +37,12 @@ namespace ams::kern {
static_assert(ClassToken<KSession> == 0b00011001'00000000);
static_assert(ClassToken<KSharedMemory> == 0b00101001'00000000);
static_assert(ClassToken<KEvent> == 0b01001001'00000000);
static_assert(ClassToken<KWritableEvent> == 0b10001001'00000000);
static_assert(ClassToken<KLightClientSession> == 0b00110001'00000000);
static_assert(ClassToken<KLightServerSession> == 0b01010001'00000000);
static_assert(ClassToken<KTransferMemory> == 0b10010001'00000000);
static_assert(ClassToken<KDeviceAddressSpace> == 0b01100001'00000000);
static_assert(ClassToken<KSessionRequest> == 0b10100001'00000000);
static_assert(ClassToken<KCodeMemory> == 0b11000001'00000000);
static_assert(ClassToken<KLightClientSession> == 0b10001001'00000000);
static_assert(ClassToken<KLightServerSession> == 0b00110001'00000000);
static_assert(ClassToken<KTransferMemory> == 0b01010001'00000000);
static_assert(ClassToken<KDeviceAddressSpace> == 0b10010001'00000000);
static_assert(ClassToken<KSessionRequest> == 0b01100001'00000000);
static_assert(ClassToken<KCodeMemory> == 0b10100001'00000000);
/* Ensure that the token hierarchy is correct. */
@ -67,13 +66,12 @@ namespace ams::kern {
static_assert(ClassToken<KSession> == ((0b00011001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KSharedMemory> == ((0b00101001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KEvent> == ((0b01001001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KWritableEvent> == ((0b10001001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KLightClientSession> == ((0b00110001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KLightServerSession> == ((0b01010001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KTransferMemory> == ((0b10010001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KDeviceAddressSpace> == ((0b01100001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KSessionRequest> == ((0b10100001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KCodeMemory> == ((0b11000001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KLightClientSession> == ((0b10001001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KLightServerSession> == ((0b00110001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KTransferMemory> == ((0b01010001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KDeviceAddressSpace> == ((0b10010001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KSessionRequest> == ((0b01100001 << 8) | ClassToken<KAutoObject>));
static_assert(ClassToken<KCodeMemory> == ((0b10100001 << 8) | ClassToken<KAutoObject>));
/* Ensure that the token hierarchy reflects the class hierarchy. */
@ -96,7 +94,6 @@ namespace ams::kern {
static_assert(std::is_final<KSession>::value && std::is_base_of<KAutoObject, KSession>::value);
static_assert(std::is_final<KSharedMemory>::value && std::is_base_of<KAutoObject, KSharedMemory>::value);
static_assert(std::is_final<KEvent>::value && std::is_base_of<KAutoObject, KEvent>::value);
static_assert(std::is_final<KWritableEvent>::value && std::is_base_of<KAutoObject, KWritableEvent>::value);
static_assert(std::is_final<KLightClientSession>::value && std::is_base_of<KAutoObject, KLightClientSession>::value);
static_assert(std::is_final<KLightServerSession>::value && std::is_base_of<KAutoObject, KLightServerSession>::value);
static_assert(std::is_final<KTransferMemory>::value && std::is_base_of<KAutoObject, KTransferMemory>::value);

2
libraries/libmesosphere/source/kern_k_client_session.cpp
View file

@ -53,7 +53,7 @@ namespace ams::kern {
return GetCurrentThread().GetWaitResult(std::addressof(dummy));
}
Result KClientSession::SendAsyncRequest(KWritableEvent *event, uintptr_t address, size_t size) {
Result KClientSession::SendAsyncRequest(KEvent *event, uintptr_t address, size_t size) {
MESOSPHERE_ASSERT_THIS();
/* Create a session request. */

8
libraries/libmesosphere/source/kern_k_dump_object.cpp
View file

@ -99,15 +99,11 @@ namespace ams::kern::KDumpObject {
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s OwnerPID=%d (%s) OwnerAddress=%lx Size=%zu KB\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName(), static_cast<s32>(target_owner->GetId()), target_owner->GetName(), GetInteger(target->GetSourceAddress()), target->GetSize() / 1_KB);
} else if (auto *target = obj->DynamicCast<KInterruptEvent *>(); target != nullptr) {
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s irq=%d\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName(), target->GetInterruptId());
} else if (auto *target = obj->DynamicCast<KWritableEvent *>(); target != nullptr) {
if (KEvent *event = target->GetParent(); event != nullptr) {
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s Pair=%p\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName(), std::addressof(event->GetReadableEvent()));
} else {
} else if (auto *target = obj->DynamicCast<KEvent *>(); target != nullptr) {
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName());
}
} else if (auto *target = obj->DynamicCast<KReadableEvent *>(); target != nullptr) {
if (KEvent *event = target->GetParent(); event != nullptr) {
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s Pair=%p\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName(), std::addressof(event->GetWritableEvent()));
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s Parent=%p\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName(), event);
} else {
MESOSPHERE_RELEASE_LOG("Handle %08x Obj=%p Ref=%d Type=%s\n", handle, obj.GetPointerUnsafe(), obj->GetReferenceCount() - 1, obj->GetTypeName());
}

28
libraries/libmesosphere/source/kern_k_event.cpp
View file

@ -20,19 +20,11 @@ namespace ams::kern {
void KEvent::Initialize() {
MESOSPHERE_ASSERT_THIS();
/* Increment reference count. */
/* Because reference count is one on creation, this will result */
/* in a reference count of two. Thus, when both readable and */
/* writable events are closed this object will be destroyed. */
this->Open();
/* Create our sub events. */
/* Create our readable event. */
KAutoObject::Create(std::addressof(m_readable_event));
KAutoObject::Create(std::addressof(m_writable_event));
/* Initialize our sub sessions. */
/* Initialize our readable event. */
m_readable_event.Initialize(this);
m_writable_event.Initialize(this);
/* Set our owner process. */
m_owner = GetCurrentProcessPointer();
@ -48,6 +40,22 @@ namespace ams::kern {
KAutoObjectWithSlabHeapAndContainer<KEvent, KAutoObjectWithList>::Finalize();
}
Result KEvent::Signal() {
KScopedSchedulerLock sl;
R_SUCCEED_IF(m_readable_event_destroyed);
return m_readable_event.Signal();
}
Result KEvent::Clear() {
KScopedSchedulerLock sl;
R_SUCCEED_IF(m_readable_event_destroyed);
return m_readable_event.Clear();
}
void KEvent::PostDestroy(uintptr_t arg) {
/* Release the event count resource the owner process holds. */
KProcess *owner = reinterpret_cast<KProcess *>(arg);

15
libraries/libmesosphere/source/kern_k_readable_event.cpp
View file

@ -17,6 +17,16 @@
namespace ams::kern {
void KReadableEvent::Initialize(KEvent *parent) {
MESOSPHERE_ASSERT_THIS();
m_is_signaled = false;
m_parent = parent;
if (m_parent != nullptr) {
m_parent->Open();
}
}
bool KReadableEvent::IsSignaled() const {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
@ -27,6 +37,11 @@ namespace ams::kern {
void KReadableEvent::Destroy() {
MESOSPHERE_ASSERT_THIS();
if (m_parent) {
{
KScopedSchedulerLock sl;
m_parent->OnReadableEventDestroyed();
}
m_parent->Close();
}
}

8
libraries/libmesosphere/source/kern_k_server_session.cpp
View file

@ -1025,7 +1025,7 @@ namespace ams::kern {
ON_SCOPE_EXIT { request->Close(); };
/* Get the event to check whether the request is async. */
if (KWritableEvent *event = request->GetEvent(); event != nullptr) {
if (KEvent *event = request->GetEvent(); event != nullptr) {
/* The client sent an async request. */
KProcess *client = client_thread->GetOwnerProcess();
auto &client_pt = client->GetPageTable();
@ -1091,7 +1091,7 @@ namespace ams::kern {
const uintptr_t client_message = request->GetAddress();
const size_t client_buffer_size = request->GetSize();
KThread *client_thread = request->GetThread();
KWritableEvent *event = request->GetEvent();
KEvent *event = request->GetEvent();
/* Check whether we're closed. */
const bool closed = (client_thread == nullptr || m_parent->IsClientClosed());
@ -1242,7 +1242,7 @@ namespace ams::kern {
const uintptr_t client_message = request->GetAddress();
const size_t client_buffer_size = request->GetSize();
KThread *client_thread = request->GetThread();
KWritableEvent *event = request->GetEvent();
KEvent *event = request->GetEvent();
KProcess *server_process = request->GetServerProcess();
KProcess *client_process = (client_thread != nullptr) ? client_thread->GetOwnerProcess() : nullptr;
@ -1285,7 +1285,7 @@ namespace ams::kern {
while (true) {
/* Declare variables for processing the request. */
KSessionRequest *request = nullptr;
KWritableEvent *event = nullptr;
KEvent *event = nullptr;
KThread *thread = nullptr;
bool cur_request = false;
bool terminate = false;

40
libraries/libmesosphere/source/kern_k_writable_event.cpp
View file

@ -1,40 +0,0 @@
/*
* Copyright (c) 2018-2020 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/>.
*/
#include <mesosphere.hpp>
namespace ams::kern {
void KWritableEvent::Initialize(KEvent *p) {
/* Set parent, open a reference to the readable event. */
m_parent = p;
m_parent->GetReadableEvent().Open();
}
Result KWritableEvent::Signal() {
return m_parent->GetReadableEvent().Signal();
}
Result KWritableEvent::Clear() {
return m_parent->GetReadableEvent().Clear();
}
void KWritableEvent::Destroy() {
/* Close our references. */
m_parent->GetReadableEvent().Close();
m_parent->Close();
}
}

18
libraries/libmesosphere/source/svc/kern_svc_event.cpp
View file

@ -26,10 +26,10 @@ namespace ams::kern::svc {
auto &handle_table = GetCurrentProcess().GetHandleTable();
/* Get the writable event. */
KScopedAutoObject writable_event = handle_table.GetObject<KWritableEvent>(event_handle);
R_UNLESS(writable_event.IsNotNull(), svc::ResultInvalidHandle());
KScopedAutoObject event = handle_table.GetObject<KEvent>(event_handle);
R_UNLESS(event.IsNotNull(), svc::ResultInvalidHandle());
return writable_event->Signal();
return event->Signal();
}
Result ClearEvent(ams::svc::Handle event_handle) {
@ -38,9 +38,9 @@ namespace ams::kern::svc {
/* Try to clear the writable event. */
{
KScopedAutoObject writable_event = handle_table.GetObject<KWritableEvent>(event_handle);
if (writable_event.IsNotNull()) {
return writable_event->Clear();
KScopedAutoObject event = handle_table.GetObject<KEvent>(event_handle);
if (event.IsNotNull()) {
return event->Clear();
}
}
@ -76,15 +76,15 @@ namespace ams::kern::svc {
/* Ensure that we clean up the event (and its only references are handle table) on function end. */
ON_SCOPE_EXIT {
event->GetWritableEvent().Close();
event->GetReadableEvent().Close();
event->Close();
};
/* Register the event. */
KEvent::Register(event);
/* Add the writable event to the handle table. */
R_TRY(handle_table.Add(out_write, std::addressof(event->GetWritableEvent())));
/* Add the event to the handle table. */
R_TRY(handle_table.Add(out_write, event));
/* Ensure that we maintaing a clean handle state on exit. */
auto handle_guard = SCOPE_GUARD { handle_table.Remove(*out_write); };

4
libraries/libmesosphere/source/svc/kern_svc_ipc.cpp
View file

@ -191,7 +191,7 @@ namespace ams::kern::svc {
/* At end of scope, kill the standing references to the sub events. */
ON_SCOPE_EXIT {
event->GetReadableEvent().Close();
event->GetWritableEvent().Close();
event->Close();
};
/* Register the event. */
@ -204,7 +204,7 @@ namespace ams::kern::svc {
auto read_guard = SCOPE_GUARD { handle_table.Remove(*out_event_handle); };
/* Send the async request. */
R_TRY(session->SendAsyncRequest(std::addressof(event->GetWritableEvent()), message, buffer_size));
R_TRY(session->SendAsyncRequest(event, message, buffer_size));
/* We succeeded. */
read_guard.Cancel();