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Merge pull request #3162 from bunnei/fix-shared-ptr-crash

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kernel: Fix reference management for client/server session.
This commit is contained in:
Fernando Sahmkow 2019-11-26 07:13:04 -04:00 committed by GitHub
commit 59484442a0
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3 changed files with 18 additions and 20 deletions
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16
src/core/hle/kernel/client_session.cpp
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@ -16,20 +16,18 @@ ClientSession::ClientSession(KernelCore& kernel) : Object{kernel} {}
ClientSession::~ClientSession() {
// This destructor will be called automatically when the last ClientSession handle is closed by
// the emulated application.
if (parent->server) {
parent->server->ClientDisconnected();
if (auto server = parent->server.lock()) {
server->ClientDisconnected();
}
parent->client = nullptr;
}
ResultCode ClientSession::SendSyncRequest(Thread* thread) {
// Keep ServerSession alive until we're done working with it.
if (parent->server == nullptr)
return ERR_SESSION_CLOSED_BY_REMOTE;
// Signal the server session that new data is available
return parent->server->HandleSyncRequest(SharedFrom(thread));
if (auto server = parent->server.lock()) {
return server->HandleSyncRequest(SharedFrom(thread));
}
return ERR_SESSION_CLOSED_BY_REMOTE;
}
} // namespace Kernel

16
src/core/hle/kernel/server_session.cpp
View File

@ -31,8 +31,6 @@ ServerSession::~ServerSession() {
if (parent->port) {
parent->port->ConnectionClosed();
}
parent->server = nullptr;
}
ResultVal<std::shared_ptr<ServerSession>> ServerSession::Create(KernelCore& kernel,
@ -46,13 +44,15 @@ ResultVal<std::shared_ptr<ServerSession>> ServerSession::Create(KernelCore& kern
}
bool ServerSession::ShouldWait(const Thread* thread) const {
// Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
if (parent->client == nullptr)
return false;
// Wait if we have no pending requests, or if we're currently handling a request.
if (auto client = parent->client.lock()) {
return pending_requesting_threads.empty() || currently_handling != nullptr;
}
// Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
return {};
}
void ServerSession::Acquire(Thread* thread) {
ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
// We are now handling a request, pop it from the stack.
@ -192,9 +192,9 @@ ServerSession::SessionPair ServerSession::CreateSessionPair(KernelCore& kernel,
std::shared_ptr<ClientSession> client_session = std::make_shared<ClientSession>(kernel);
client_session->name = name + "_Client";
std::shared_ptr<Session> parent(new Session);
parent->client = client_session.get();
parent->server = server_session.get();
std::shared_ptr<Session> parent = std::make_shared<Session>();
parent->client = client_session;
parent->server = server_session;
parent->port = std::move(port);
client_session->parent = parent;

4
src/core/hle/kernel/session.h
View File

@ -20,8 +20,8 @@ class ServerSession;
*/
class Session final {
public:
ClientSession* client = nullptr; ///< The client endpoint of the session.
ServerSession* server = nullptr; ///< The server endpoint of the session.
std::weak_ptr<ClientSession> client; ///< The client endpoint of the session.
std::weak_ptr<ServerSession> server; ///< The server endpoint of the session.
std::shared_ptr<ClientPort> port; ///< The port that this session is associated with (optional).
};
} // namespace Kernel