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// Copyright 2019 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <tuple>
#include <utility>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/scope_exit.h"
#include "core/core_timing.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/kernel/k_client_port.h"
#include "core/hle/kernel/k_handle_table.h"
#include "core/hle/kernel/k_port.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_scheduler.h"
#include "core/hle/kernel/k_server_port.h"
#include "core/hle/kernel/k_server_session.h"
#include "core/hle/kernel/k_session.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/kernel.h"
#include "core/memory.h"
namespace Kernel {
KServerSession::KServerSession(KernelCore& kernel_) : KSynchronizationObject{kernel_} {}
KServerSession::~KServerSession() {}
void KServerSession::Initialize(KSession* parent_session_, std::string&& name_,
std::shared_ptr<SessionRequestManager> manager_) {
// Set member variables.
parent = parent_session_;
name = std::move(name_);
if (manager_) {
manager = manager_;
} else {
manager = std::make_shared<SessionRequestManager>(kernel);
}
}
void KServerSession::Destroy() {
parent->OnServerClosed();
parent->Close();
}
void KServerSession::OnClientClosed() {
if (manager->HasSessionHandler()) {
manager->SessionHandler().ClientDisconnected(this);
}
}
bool KServerSession::IsSignaled() const {
ASSERT(kernel.GlobalSchedulerContext().IsLocked());
// If the client is closed, we're always signaled.
if (parent->IsClientClosed()) {
return true;
}
// Otherwise, we're signaled if we have a request and aren't handling one.
return false;
}
void KServerSession::AppendDomainHandler(SessionRequestHandlerPtr handler) {
manager->AppendDomainHandler(std::move(handler));
}
std::size_t KServerSession::NumDomainRequestHandlers() const {
return manager->DomainHandlerCount();
}
ResultCode KServerSession::HandleDomainSyncRequest(Kernel::HLERequestContext& context) {
if (!context.HasDomainMessageHeader()) {
return ResultSuccess;
}
// Set domain handlers in HLE context, used for domain objects (IPC interfaces) as inputs
context.SetSessionRequestManager(manager);
// If there is a DomainMessageHeader, then this is CommandType "Request"
const auto& domain_message_header = context.GetDomainMessageHeader();
const u32 object_id{domain_message_header.object_id};
switch (domain_message_header.command) {
case IPC::DomainMessageHeader::CommandType::SendMessage:
if (object_id > manager->DomainHandlerCount()) {
LOG_CRITICAL(IPC,
"object_id {} is too big! This probably means a recent service call "
"to {} needed to return a new interface!",
object_id, name);
UNREACHABLE();
return ResultSuccess; // Ignore error if asserts are off
}
return manager->DomainHandler(object_id - 1)->HandleSyncRequest(*this, context);
case IPC::DomainMessageHeader::CommandType::CloseVirtualHandle: {
LOG_DEBUG(IPC, "CloseVirtualHandle, object_id=0x{:08X}", object_id);
manager->CloseDomainHandler(object_id - 1);
IPC::ResponseBuilder rb{context, 2};
rb.Push(ResultSuccess);
return ResultSuccess;
}
}
LOG_CRITICAL(IPC, "Unknown domain command={}", domain_message_header.command.Value());
ASSERT(false);
return ResultSuccess;
}
ResultCode KServerSession::QueueSyncRequest(KThread* thread, Core::Memory::Memory& memory) {
u32* cmd_buf{reinterpret_cast<u32*>(memory.GetPointer(thread->GetTLSAddress()))};
auto context = std::make_shared<HLERequestContext>(kernel, memory, this, thread);
context->PopulateFromIncomingCommandBuffer(kernel.CurrentProcess()->GetHandleTable(), cmd_buf);
// In the event that something fails here, stub a result to prevent the game from crashing.
// This is a work-around in the event that somehow we process a service request after the
// session has been closed by the game. This has been observed to happen rarely in Pokemon
// Sword/Shield and is likely a result of us using host threads/scheduling for services.
// TODO(bunnei): Find a better solution here.
auto error_guard = SCOPE_GUARD({ CompleteSyncRequest(*context); });
// Ensure we have a session request handler
if (manager->HasSessionRequestHandler(*context)) {
if (auto strong_ptr = manager->GetServiceThread().lock()) {
strong_ptr->QueueSyncRequest(*parent, std::move(context));
// We succeeded.
error_guard.Cancel();
} else {
ASSERT_MSG(false, "strong_ptr is nullptr!");
}
} else {
ASSERT_MSG(false, "handler is invalid!");
}
return ResultSuccess;
}
ResultCode KServerSession::CompleteSyncRequest(HLERequestContext& context) {
ResultCode result = ResultSuccess;
// If the session has been converted to a domain, handle the domain request
if (manager->HasSessionRequestHandler(context)) {
if (IsDomain() && context.HasDomainMessageHeader()) {
result = HandleDomainSyncRequest(context);
// If there is no domain header, the regular session handler is used
} else if (manager->HasSessionHandler()) {
// If this ServerSession has an associated HLE handler, forward the request to it.
result = manager->SessionHandler().HandleSyncRequest(*this, context);
}
} else {
ASSERT_MSG(false, "Session handler is invalid, stubbing response!");
IPC::ResponseBuilder rb(context, 2);
rb.Push(ResultSuccess);
}
if (convert_to_domain) {
ASSERT_MSG(!IsDomain(), "ServerSession is already a domain instance.");
manager->ConvertToDomain();
convert_to_domain = false;
}
// Some service requests require the thread to block
{
KScopedSchedulerLock lock(kernel);
if (!context.IsThreadWaiting()) {
context.GetThread().Wakeup();
context.GetThread().SetSyncedObject(nullptr, result);
}
}
return result;
}
ResultCode KServerSession::HandleSyncRequest(KThread* thread, Core::Memory::Memory& memory,
Core::Timing::CoreTiming& core_timing) {
return QueueSyncRequest(thread, memory);
}
} // namespace Kernel
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