adb: make disconnect stop reconnection immediately. (902dace1) · Commits · e / os / android_system_core

adb/test_adb.py

+47 −6

Original line number	Diff line number	Diff line
		@@ -28,6 +28,7 @@ import socket
		import struct
		import subprocess
		import threading
		import time
		import unittest


		@@ -90,7 +91,7 @@ def fake_adbd(protocol=socket.AF_INET, port=0):
		server_thread.start()

		try:
		yield port
		yield port, writesock
		finally:
		writesock.close()
		server_thread.join()
		@@ -120,7 +121,7 @@ def adb_connect(unittest, serial):
		def adb_server():
		"""Context manager for an ADB server.

		This creates an ADB server and returns the port it"s listening on.
		This creates an ADB server and returns the port it's listening on.
		"""

		port = 5038
		@@ -342,7 +343,7 @@ class EmulatorTest(unittest.TestCase):
		Bug: http://b/78991667
		"""
		with adb_server() as server_port:
		with fake_adbd() as port:
		with fake_adbd() as (port, _):
		serial = "emulator-{}".format(port - 1)
		# Ensure that the emulator is not there.
		try:
		@@ -380,7 +381,7 @@ class ConnectionTest(unittest.TestCase):
		"""
		for protocol in (socket.AF_INET, socket.AF_INET6):
		try:
		with fake_adbd(protocol=protocol) as port:
		with fake_adbd(protocol=protocol) as (port, _):
		serial = "localhost:{}".format(port)
		with adb_connect(self, serial):
		pass
		@@ -391,7 +392,7 @@ class ConnectionTest(unittest.TestCase):
		def test_already_connected(self):
		"""Ensure that an already-connected device stays connected."""

		with fake_adbd() as port:
		with fake_adbd() as (port, _):
		serial = "localhost:{}".format(port)
		with adb_connect(self, serial):
		# b/31250450: this always returns 0 but probably shouldn't.
		@@ -403,7 +404,7 @@ class ConnectionTest(unittest.TestCase):
		def test_reconnect(self):
		"""Ensure that a disconnected device reconnects."""

		with fake_adbd() as port:
		with fake_adbd() as (port, _):
		serial = "localhost:{}".format(port)
		with adb_connect(self, serial):
		output = subprocess.check_output(["adb", "-s", serial,
		@@ -439,6 +440,46 @@ class ConnectionTest(unittest.TestCase):
		"error: device '{}' not found".format(serial).encode("utf8"))


		class DisconnectionTest(unittest.TestCase):
		"""Tests for adb disconnect."""

		def test_disconnect(self):
		"""Ensure that `adb disconnect` takes effect immediately."""

		def _devices(port):
		output = subprocess.check_output(["adb", "-P", str(port), "devices"])
		return [x.split("\t") for x in output.decode("utf8").strip().splitlines()[1:]]

		with adb_server() as server_port:
		with fake_adbd() as (port, sock):
		device_name = "localhost:{}".format(port)
		output = subprocess.check_output(["adb", "-P", str(server_port),
		"connect", device_name])
		self.assertEqual(output.strip(),
		"connected to {}".format(device_name).encode("utf8"))


		self.assertEqual(_devices(server_port), [[device_name, "device"]])

		# Send a deliberately malformed packet to make the device go offline.
		packet = struct.pack("IIIIII", 0, 0, 0, 0, 0, 0)
		sock.sendall(packet)

		# Wait a bit.
		time.sleep(0.1)

		self.assertEqual(_devices(server_port), [[device_name, "offline"]])

		# Disconnect the device.
		output = subprocess.check_output(["adb", "-P", str(server_port),
		"disconnect", device_name])

		# Wait a bit.
		time.sleep(0.1)

		self.assertEqual(_devices(server_port), [])


		def main():
		"""Main entrypoint."""
		random.seed(0)

adb/transport.cpp

+31 −7

Original line number	Diff line number	Diff line
		@@ -97,6 +97,9 @@ class ReconnectHandler {
		// Adds the atransport* to the queue of reconnect attempts.
		void TrackTransport(atransport* transport);

		// Wake up the ReconnectHandler thread to have it check for kicked transports.
		void CheckForKicked();

		private:
		// The main thread loop.
		void Run();
		@@ -166,6 +169,10 @@ void ReconnectHandler::TrackTransport(atransport* transport) {
		reconnect_cv_.notify_one();
		}

		void ReconnectHandler::CheckForKicked() {
		reconnect_cv_.notify_one();
		}

		void ReconnectHandler::Run() {
		while (true) {
		ReconnectAttempt attempt;
		@@ -184,10 +191,25 @@ void ReconnectHandler::Run() {
		}

		if (!running_) return;

		// Scan the whole list for kicked transports, so that we immediately handle an explicit
		// disconnect request.
		bool kicked = false;
		for (auto it = reconnect_queue_.begin(); it != reconnect_queue_.end();) {
		if (it->transport->kicked()) {
		D("transport %s was kicked. giving up on it.", it->transport->serial.c_str());
		remove_transport(it->transport);
		it = reconnect_queue_.erase(it);
		} else {
		++it;
		}
		kicked = true;
		}

		if (reconnect_queue_.empty()) continue;

		// Go back to sleep in case \|reconnect_cv_\| woke up spuriously and we still
		// have more time to wait for the current attempt.
		// Go back to sleep if we either woke up spuriously, or we were woken up to remove
		// a kicked transport, and the first transport isn't ready for reconnection yet.
		auto now = std::chrono::steady_clock::now();
		if (reconnect_queue_.begin()->reconnect_time > now) {
		continue;
		@@ -195,11 +217,6 @@ void ReconnectHandler::Run() {

		attempt = *reconnect_queue_.begin();
		reconnect_queue_.erase(reconnect_queue_.begin());
		if (attempt.transport->kicked()) {
		D("transport %s was kicked. giving up on it.", attempt.transport->serial.c_str());
		remove_transport(attempt.transport);
		continue;
		}
		}
		D("attempting to reconnect %s", attempt.transport->serial.c_str());

		@@ -448,6 +465,10 @@ void kick_transport(atransport* t) {
		if (std::find(transport_list.begin(), transport_list.end(), t) != transport_list.end()) {
		t->Kick();
		}

		#if ADB_HOST
		reconnect_handler.CheckForKicked();
		#endif
		}

		static int transport_registration_send = -1;
		@@ -1276,6 +1297,9 @@ void kick_all_tcp_devices() {
		t->Kick();
		}
		}
		#if ADB_HOST
		reconnect_handler.CheckForKicked();
		#endif
		}

		#endif