Merge "libbinder: shutdown session threads" am: c1500480cb am: e8990d0d2a am: bf6d2a9c43 am: 6c6cd10c01

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1716214

Change-Id: I02b7a1f5cf7fef32a5c88983f63b83dfc0497306

1 files changed, 19 insertions, 1 deletions

diff --git a/libs/binder/RpcSession.cpp b/libs/binder/RpcSession.cpp
index 9f26a33335..7c458c123a 100644
--- a/libs/binder/RpcSession.cpp
+++ b/libs/binder/RpcSession.cpp
@@ -207,12 +207,19 @@ void RpcSession::join(unique_fd client) {
     LOG_ALWAYS_FATAL_IF(!removeServerConnection(connection),
                         "bad state: connection object guaranteed to be in list");
 
+    sp<RpcServer> server;
     {
         std::lock_guard<std::mutex> _l(mMutex);
         auto it = mThreads.find(std::this_thread::get_id());
         LOG_ALWAYS_FATAL_IF(it == mThreads.end());
         it->second.detach();
         mThreads.erase(it);
+
+        server = mForServer.promote();
+    }
+
+    if (server != nullptr) {
+        server->onSessionThreadEnding(sp<RpcSession>::fromExisting(this));
     }
 }
 
@@ -314,14 +321,25 @@ bool RpcSession::setupOneSocketClient(const RpcSocketAddress& addr, int32_t id)
 
 void RpcSession::addClientConnection(unique_fd fd) {
     std::lock_guard<std::mutex> _l(mMutex);
+
+    if (mShutdownTrigger == nullptr) {
+        mShutdownTrigger = FdTrigger::make();
+    }
+
     sp<RpcConnection> session = sp<RpcConnection>::make();
     session->fd = std::move(fd);
     mClientConnections.push_back(session);
 }
 
-void RpcSession::setForServer(const wp<RpcServer>& server, int32_t sessionId) {
+void RpcSession::setForServer(const wp<RpcServer>& server, int32_t sessionId,
+                              const std::shared_ptr<FdTrigger>& shutdownTrigger) {
+    LOG_ALWAYS_FATAL_IF(mForServer.unsafe_get() != nullptr);
+    LOG_ALWAYS_FATAL_IF(mShutdownTrigger != nullptr);
+    LOG_ALWAYS_FATAL_IF(shutdownTrigger == nullptr);
+
     mId = sessionId;
     mForServer = server;
+    mShutdownTrigger = shutdownTrigger;
 }
 
 sp<RpcSession::RpcConnection> RpcSession::assignServerToThisThread(unique_fd fd) {