|
| 1 | +import logging |
| 2 | +import os |
| 3 | +import os.path |
| 4 | +import random |
| 5 | + |
| 6 | +import lldb |
| 7 | +from lldbsuite.test.lldbtest import * |
| 8 | +from lldbsuite.test.gdbclientutils import * |
| 9 | +import lldbgdbserverutils |
| 10 | +from lldbsuite.support import seven |
| 11 | + |
| 12 | + |
| 13 | +class GDBProxyTestBase(TestBase): |
| 14 | + """ |
| 15 | + Base class for gdbserver proxy tests. |
| 16 | +
|
| 17 | + This class will setup and start a mock GDB server for the test to use. |
| 18 | + It pases through requests to a regular lldb-server/debugserver and |
| 19 | + forwards replies back to the LLDB under test. |
| 20 | + """ |
| 21 | + |
| 22 | + """The gdbserver that we implement.""" |
| 23 | + server = None |
| 24 | + """The inner lldb-server/debugserver process that we proxy requests into.""" |
| 25 | + monitor_server = None |
| 26 | + monitor_sock = None |
| 27 | + |
| 28 | + server_socket_class = TCPServerSocket |
| 29 | + |
| 30 | + DEFAULT_TIMEOUT = 20 * (10 if ("ASAN_OPTIONS" in os.environ) else 1) |
| 31 | + |
| 32 | + _verbose_log_handler = None |
| 33 | + _log_formatter = logging.Formatter(fmt="%(asctime)-15s %(levelname)-8s %(message)s") |
| 34 | + |
| 35 | + def setUpBaseLogging(self): |
| 36 | + self.logger = logging.getLogger(__name__) |
| 37 | + |
| 38 | + if len(self.logger.handlers) > 0: |
| 39 | + return # We have set up this handler already |
| 40 | + |
| 41 | + self.logger.propagate = False |
| 42 | + self.logger.setLevel(logging.DEBUG) |
| 43 | + |
| 44 | + # log all warnings to stderr |
| 45 | + handler = logging.StreamHandler() |
| 46 | + handler.setLevel(logging.WARNING) |
| 47 | + handler.setFormatter(self._log_formatter) |
| 48 | + self.logger.addHandler(handler) |
| 49 | + |
| 50 | + def setUp(self): |
| 51 | + TestBase.setUp(self) |
| 52 | + |
| 53 | + self.setUpBaseLogging() |
| 54 | + |
| 55 | + if self.isVerboseLoggingRequested(): |
| 56 | + # If requested, full logs go to a log file |
| 57 | + log_file_name = self.getLogBasenameForCurrentTest() + "-proxy.log" |
| 58 | + self._verbose_log_handler = logging.FileHandler( |
| 59 | + log_file_name |
| 60 | + ) |
| 61 | + self._verbose_log_handler.setFormatter(self._log_formatter) |
| 62 | + self._verbose_log_handler.setLevel(logging.DEBUG) |
| 63 | + self.logger.addHandler(self._verbose_log_handler) |
| 64 | + |
| 65 | + lldb_server_exe = lldbgdbserverutils.get_lldb_server_exe() |
| 66 | + if lldb_server_exe is None: |
| 67 | + self.debug_monitor_exe = lldbgdbserverutils.get_debugserver_exe() |
| 68 | + self.assertTrue(self.debug_monitor_exe is not None) |
| 69 | + self.debug_monitor_extra_args = [] |
| 70 | + else: |
| 71 | + self.debug_monitor_exe = lldb_server_exe |
| 72 | + self.debug_monitor_extra_args = ["gdbserver"] |
| 73 | + |
| 74 | + self.server = MockGDBServer(self.server_socket_class()) |
| 75 | + self.server.responder = self |
| 76 | + |
| 77 | + def tearDown(self): |
| 78 | + # TestBase.tearDown will kill the process, but we need to kill it early |
| 79 | + # so its client connection closes and we can stop the server before |
| 80 | + # finally calling the base tearDown. |
| 81 | + if self.process() is not None: |
| 82 | + self.process().Kill() |
| 83 | + self.server.stop() |
| 84 | + |
| 85 | + self.logger.removeHandler(self._verbose_log_handler) |
| 86 | + self._verbose_log_handler = None |
| 87 | + |
| 88 | + TestBase.tearDown(self) |
| 89 | + |
| 90 | + def isVerboseLoggingRequested(self): |
| 91 | + # We will report our detailed logs if the user requested that the "gdb-remote" channel is |
| 92 | + # logged. |
| 93 | + return any(("gdb-remote" in channel) for channel in lldbtest_config.channels) |
| 94 | + |
| 95 | + def connect(self, target): |
| 96 | + """ |
| 97 | + Create a process by connecting to the mock GDB server. |
| 98 | + """ |
| 99 | + self.prep_debug_monitor_and_inferior() |
| 100 | + self.server.start() |
| 101 | + |
| 102 | + listener = self.dbg.GetListener() |
| 103 | + error = lldb.SBError() |
| 104 | + process = target.ConnectRemote( |
| 105 | + listener, self.server.get_connect_url(), "gdb-remote", error |
| 106 | + ) |
| 107 | + self.assertTrue(error.Success(), error.description) |
| 108 | + self.assertTrue(process, PROCESS_IS_VALID) |
| 109 | + return process |
| 110 | + |
| 111 | + def get_next_port(self): |
| 112 | + return 12000 + random.randint(0, 3999) |
| 113 | + |
| 114 | + def prep_debug_monitor_and_inferior(self): |
| 115 | + inferior_exe_path = self.getBuildArtifact("a.out") |
| 116 | + self.connect_to_debug_monitor([inferior_exe_path]) |
| 117 | + self.assertIsNotNone(self.monitor_server) |
| 118 | + self.initial_handshake() |
| 119 | + |
| 120 | + def initial_handshake(self): |
| 121 | + self.monitor_server.send_packet(seven.bitcast_to_bytes("+")) |
| 122 | + reply = seven.bitcast_to_string(self.monitor_server.get_normal_packet()) |
| 123 | + self.assertEqual(reply, "+") |
| 124 | + self.monitor_server.send_packet(seven.bitcast_to_bytes("QStartNoAckMode")) |
| 125 | + reply = seven.bitcast_to_string(self.monitor_server.get_normal_packet()) |
| 126 | + self.assertEqual(reply, "+") |
| 127 | + reply = seven.bitcast_to_string(self.monitor_server.get_normal_packet()) |
| 128 | + self.assertEqual(reply, "OK") |
| 129 | + self.monitor_server.send_packet(seven.bitcast_to_bytes("+")) |
| 130 | + reply = seven.bitcast_to_string(self.monitor_server.get_normal_packet()) |
| 131 | + self.assertEqual(reply, "+") |
| 132 | + |
| 133 | + def get_debug_monitor_command_line_args(self, connect_address, launch_args): |
| 134 | + return self.debug_monitor_extra_args + ["--reverse-connect", connect_address] + launch_args |
| 135 | + |
| 136 | + def launch_debug_monitor(self, launch_args): |
| 137 | + family, type, proto, _, addr = socket.getaddrinfo( |
| 138 | + "localhost", 0, proto=socket.IPPROTO_TCP |
| 139 | + )[0] |
| 140 | + sock = socket.socket(family, type, proto) |
| 141 | + sock.settimeout(self.DEFAULT_TIMEOUT) |
| 142 | + sock.bind(addr) |
| 143 | + sock.listen(1) |
| 144 | + addr = sock.getsockname() |
| 145 | + connect_address = "[{}]:{}".format(*addr) |
| 146 | + |
| 147 | + commandline_args = self.get_debug_monitor_command_line_args( |
| 148 | + connect_address, launch_args |
| 149 | + ) |
| 150 | + |
| 151 | + # Start the server. |
| 152 | + self.logger.info(f"Spawning monitor {commandline_args}") |
| 153 | + monitor_process = self.spawnSubprocess( |
| 154 | + self.debug_monitor_exe, commandline_args, install_remote=False |
| 155 | + ) |
| 156 | + self.assertIsNotNone(monitor_process) |
| 157 | + |
| 158 | + self.monitor_sock = sock.accept()[0] |
| 159 | + self.monitor_sock.settimeout(self.DEFAULT_TIMEOUT) |
| 160 | + return monitor_process |
| 161 | + |
| 162 | + def connect_to_debug_monitor(self, launch_args): |
| 163 | + monitor_process = self.launch_debug_monitor(launch_args) |
| 164 | + self.monitor_server = lldbgdbserverutils.Server(self.monitor_sock, monitor_process) |
| 165 | + |
| 166 | + def respond(self, packet): |
| 167 | + """Subclasses can override this to change how packets are handled.""" |
| 168 | + return self.pass_through(packet) |
| 169 | + |
| 170 | + def pass_through(self, packet): |
| 171 | + self.logger.info(f"Sending packet {packet}") |
| 172 | + self.monitor_server.send_packet(seven.bitcast_to_bytes(packet)) |
| 173 | + reply = seven.bitcast_to_string(self.monitor_server.get_normal_packet()) |
| 174 | + self.logger.info(f"Received reply {reply}") |
| 175 | + return reply |
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