1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
// 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 "core/core.h"
#include "core/core_timing.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/client_session.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/scheduler.h"
#include "core/hle/kernel/server_session.h"
#include "core/hle/kernel/session.h"
#include "core/hle/kernel/thread.h"
#include "core/memory.h"
namespace Kernel {
ServerSession::ServerSession(KernelCore& kernel) : SynchronizationObject{kernel} {}
ServerSession::~ServerSession() = default;
ResultVal<std::shared_ptr<ServerSession>> ServerSession::Create(KernelCore& kernel,
std::shared_ptr<Session> parent,
std::string name) {
std::shared_ptr<ServerSession> session{std::make_shared<ServerSession>(kernel)};
session->request_event = Core::Timing::CreateEvent(
name, [session](u64 userdata, s64 cycles_late) { session->CompleteSyncRequest(); });
session->name = std::move(name);
session->parent = std::move(parent);
return MakeResult(std::move(session));
}
bool ServerSession::ShouldWait(const Thread* thread) const {
// Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
if (!parent->Client()) {
return false;
}
// Wait if we have no pending requests, or if we're currently handling a request.
return pending_requesting_threads.empty() || currently_handling != nullptr;
}
bool ServerSession::IsSignaled() const {
// Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
if (!parent->Client()) {
return true;
}
// Wait if we have no pending requests, or if we're currently handling a request.
return !pending_requesting_threads.empty() && currently_handling == nullptr;
}
void ServerSession::Acquire(Thread* thread) {
ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
// We are now handling a request, pop it from the stack.
// TODO(Subv): What happens if the client endpoint is closed before any requests are made?
ASSERT(!pending_requesting_threads.empty());
currently_handling = pending_requesting_threads.back();
pending_requesting_threads.pop_back();
}
void ServerSession::ClientDisconnected() {
// We keep a shared pointer to the hle handler to keep it alive throughout
// the call to ClientDisconnected, as ClientDisconnected invalidates the
// hle_handler member itself during the course of the function executing.
std::shared_ptr<SessionRequestHandler> handler = hle_handler;
if (handler) {
// Note that after this returns, this server session's hle_handler is
// invalidated (set to null).
handler->ClientDisconnected(SharedFrom(this));
}
// Clean up the list of client threads with pending requests, they are unneeded now that the
// client endpoint is closed.
pending_requesting_threads.clear();
currently_handling = nullptr;
}
void ServerSession::AppendDomainRequestHandler(std::shared_ptr<SessionRequestHandler> handler) {
domain_request_handlers.push_back(std::move(handler));
}
std::size_t ServerSession::NumDomainRequestHandlers() const {
return domain_request_handlers.size();
}
ResultCode ServerSession::HandleDomainSyncRequest(Kernel::HLERequestContext& context) {
if (!context.HasDomainMessageHeader()) {
return RESULT_SUCCESS;
}
// Set domain handlers in HLE context, used for domain objects (IPC interfaces) as inputs
context.SetDomainRequestHandlers(domain_request_handlers);
// 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 > domain_request_handlers.size()) {
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 RESULT_SUCCESS; // Ignore error if asserts are off
}
return domain_request_handlers[object_id - 1]->HandleSyncRequest(context);
case IPC::DomainMessageHeader::CommandType::CloseVirtualHandle: {
LOG_DEBUG(IPC, "CloseVirtualHandle, object_id=0x{:08X}", object_id);
domain_request_handlers[object_id - 1] = nullptr;
IPC::ResponseBuilder rb{context, 2};
rb.Push(RESULT_SUCCESS);
return RESULT_SUCCESS;
}
}
LOG_CRITICAL(IPC, "Unknown domain command={}",
static_cast<int>(domain_message_header.command.Value()));
ASSERT(false);
return RESULT_SUCCESS;
}
ResultCode ServerSession::QueueSyncRequest(std::shared_ptr<Thread> thread,
Core::Memory::Memory& memory) {
u32* cmd_buf{reinterpret_cast<u32*>(memory.GetPointer(thread->GetTLSAddress()))};
auto context =
std::make_shared<HLERequestContext>(kernel, memory, SharedFrom(this), std::move(thread));
context->PopulateFromIncomingCommandBuffer(kernel.CurrentProcess()->GetHandleTable(), cmd_buf);
request_queue.Push(std::move(context));
return RESULT_SUCCESS;
}
ResultCode ServerSession::CompleteSyncRequest() {
ASSERT(!request_queue.Empty());
auto& context = *request_queue.Front();
ResultCode result = RESULT_SUCCESS;
// If the session has been converted to a domain, handle the domain request
if (IsDomain() && context.HasDomainMessageHeader()) {
result = HandleDomainSyncRequest(context);
// If there is no domain header, the regular session handler is used
} else if (hle_handler != nullptr) {
// If this ServerSession has an associated HLE handler, forward the request to it.
result = hle_handler->HandleSyncRequest(context);
}
if (convert_to_domain) {
ASSERT_MSG(IsSession(), "ServerSession is already a domain instance.");
domain_request_handlers = {hle_handler};
convert_to_domain = false;
}
// Some service requests require the thread to block
{
SchedulerLock lock(kernel);
if (!context.IsThreadWaiting()) {
context.GetThread().ResumeFromWait();
context.GetThread().SetSynchronizationResults(nullptr, result);
}
}
request_queue.Pop();
return result;
}
ResultCode ServerSession::HandleSyncRequest(std::shared_ptr<Thread> thread,
Core::Memory::Memory& memory) {
ResultCode result = QueueSyncRequest(std::move(thread), memory);
const u64 delay = kernel.IsMulticore() ? 0U : 20000U;
Core::System::GetInstance().CoreTiming().ScheduleEvent(delay, request_event, {});
return result;
}
} // namespace Kernel
|
