//===-- GDBRemoteCommunicationServer.cpp ------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include #include "GDBRemoteCommunicationServer.h" #include "lldb/Core/StreamGDBRemote.h" // C Includes // C++ Includes // Other libraries and framework includes #include "llvm/ADT/Triple.h" #include "lldb/Interpreter/Args.h" #include "lldb/Core/ConnectionFileDescriptor.h" #include "lldb/Core/Log.h" #include "lldb/Core/State.h" #include "lldb/Core/StreamString.h" #include "lldb/Host/Endian.h" #include "lldb/Host/File.h" #include "lldb/Host/Host.h" #include "lldb/Host/TimeValue.h" #include "lldb/Target/Platform.h" #include "lldb/Target/Process.h" // Project includes #include "Utility/StringExtractorGDBRemote.h" #include "ProcessGDBRemote.h" #include "ProcessGDBRemoteLog.h" using namespace lldb; using namespace lldb_private; //---------------------------------------------------------------------- // GDBRemoteCommunicationServer constructor //---------------------------------------------------------------------- GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform) : GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), m_platform_sp (Platform::GetDefaultPlatform ()), m_async_thread (LLDB_INVALID_HOST_THREAD), m_process_launch_info (), m_process_launch_error (), m_spawned_pids (), m_spawned_pids_mutex (Mutex::eMutexTypeRecursive), m_proc_infos (), m_proc_infos_index (0), m_port_map (), m_port_offset(0) { } GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform, const lldb::PlatformSP& platform_sp) : GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), m_platform_sp (platform_sp), m_async_thread (LLDB_INVALID_HOST_THREAD), m_process_launch_info (), m_process_launch_error (), m_spawned_pids (), m_spawned_pids_mutex (Mutex::eMutexTypeRecursive), m_proc_infos (), m_proc_infos_index (0), m_port_map (), m_port_offset(0) { assert(platform_sp); } //---------------------------------------------------------------------- // Destructor //---------------------------------------------------------------------- GDBRemoteCommunicationServer::~GDBRemoteCommunicationServer() { } //void * //GDBRemoteCommunicationServer::AsyncThread (void *arg) //{ // GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer*) arg; // // Log *log;// (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); // if (log) // log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %i) thread starting...", __FUNCTION__, arg, process->GetID()); // // StringExtractorGDBRemote packet; // // while () // { // if (packet. // } // // if (log) // log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %i) thread exiting...", __FUNCTION__, arg, process->GetID()); // // process->m_async_thread = LLDB_INVALID_HOST_THREAD; // return NULL; //} // bool GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, Error &error, bool &interrupt, bool &quit) { StringExtractorGDBRemote packet; PacketResult packet_result = WaitForPacketWithTimeoutMicroSecondsNoLock (packet, timeout_usec); if (packet_result == PacketResult::Success) { const StringExtractorGDBRemote::ServerPacketType packet_type = packet.GetServerPacketType (); switch (packet_type) { case StringExtractorGDBRemote::eServerPacketType_nack: case StringExtractorGDBRemote::eServerPacketType_ack: break; case StringExtractorGDBRemote::eServerPacketType_invalid: error.SetErrorString("invalid packet"); quit = true; break; case StringExtractorGDBRemote::eServerPacketType_interrupt: error.SetErrorString("interrupt received"); interrupt = true; break; default: case StringExtractorGDBRemote::eServerPacketType_unimplemented: packet_result = SendUnimplementedResponse (packet.GetStringRef().c_str()); break; case StringExtractorGDBRemote::eServerPacketType_A: packet_result = Handle_A (packet); break; case StringExtractorGDBRemote::eServerPacketType_qfProcessInfo: packet_result = Handle_qfProcessInfo (packet); break; case StringExtractorGDBRemote::eServerPacketType_qsProcessInfo: packet_result = Handle_qsProcessInfo (packet); break; case StringExtractorGDBRemote::eServerPacketType_qC: packet_result = Handle_qC (packet); break; case StringExtractorGDBRemote::eServerPacketType_qHostInfo: packet_result = Handle_qHostInfo (packet); break; case StringExtractorGDBRemote::eServerPacketType_qLaunchGDBServer: packet_result = Handle_qLaunchGDBServer (packet); break; case StringExtractorGDBRemote::eServerPacketType_qKillSpawnedProcess: packet_result = Handle_qKillSpawnedProcess (packet); break; case StringExtractorGDBRemote::eServerPacketType_k: packet_result = Handle_k (packet); break; case StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess: packet_result = Handle_qLaunchSuccess (packet); break; case StringExtractorGDBRemote::eServerPacketType_qGroupName: packet_result = Handle_qGroupName (packet); break; case StringExtractorGDBRemote::eServerPacketType_qProcessInfoPID: packet_result = Handle_qProcessInfoPID (packet); break; case StringExtractorGDBRemote::eServerPacketType_qSpeedTest: packet_result = Handle_qSpeedTest (packet); break; case StringExtractorGDBRemote::eServerPacketType_qUserName: packet_result = Handle_qUserName (packet); break; case StringExtractorGDBRemote::eServerPacketType_qGetWorkingDir: packet_result = Handle_qGetWorkingDir(packet); break; case StringExtractorGDBRemote::eServerPacketType_QEnvironment: packet_result = Handle_QEnvironment (packet); break; case StringExtractorGDBRemote::eServerPacketType_QLaunchArch: packet_result = Handle_QLaunchArch (packet); break; case StringExtractorGDBRemote::eServerPacketType_QSetDisableASLR: packet_result = Handle_QSetDisableASLR (packet); break; case StringExtractorGDBRemote::eServerPacketType_QSetSTDIN: packet_result = Handle_QSetSTDIN (packet); break; case StringExtractorGDBRemote::eServerPacketType_QSetSTDOUT: packet_result = Handle_QSetSTDOUT (packet); break; case StringExtractorGDBRemote::eServerPacketType_QSetSTDERR: packet_result = Handle_QSetSTDERR (packet); break; case StringExtractorGDBRemote::eServerPacketType_QSetWorkingDir: packet_result = Handle_QSetWorkingDir (packet); break; case StringExtractorGDBRemote::eServerPacketType_QStartNoAckMode: packet_result = Handle_QStartNoAckMode (packet); break; case StringExtractorGDBRemote::eServerPacketType_qPlatform_mkdir: packet_result = Handle_qPlatform_mkdir (packet); break; case StringExtractorGDBRemote::eServerPacketType_qPlatform_chmod: packet_result = Handle_qPlatform_chmod (packet); break; case StringExtractorGDBRemote::eServerPacketType_qPlatform_shell: packet_result = Handle_qPlatform_shell (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_open: packet_result = Handle_vFile_Open (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_close: packet_result = Handle_vFile_Close (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_pread: packet_result = Handle_vFile_pRead (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_pwrite: packet_result = Handle_vFile_pWrite (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_size: packet_result = Handle_vFile_Size (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_mode: packet_result = Handle_vFile_Mode (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_exists: packet_result = Handle_vFile_Exists (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_stat: packet_result = Handle_vFile_Stat (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_md5: packet_result = Handle_vFile_MD5 (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_symlink: packet_result = Handle_vFile_symlink (packet); break; case StringExtractorGDBRemote::eServerPacketType_vFile_unlink: packet_result = Handle_vFile_unlink (packet); break; } } else { if (!IsConnected()) { error.SetErrorString("lost connection"); quit = true; } else { error.SetErrorString("timeout"); } } return packet_result == PacketResult::Success; } lldb_private::Error GDBRemoteCommunicationServer::SetLaunchArguments (const char *const args[], int argc) { if ((argc < 1) || !args || !args[0] || !args[0][0]) return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); m_process_launch_info.SetArguments (const_cast (args), true); return lldb_private::Error (); } lldb_private::Error GDBRemoteCommunicationServer::SetLaunchFlags (unsigned int launch_flags) { m_process_launch_info.GetFlags ().Set (launch_flags); return lldb_private::Error (); } lldb_private::Error GDBRemoteCommunicationServer::LaunchProcess () { if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); // specify the process monitor if not already set. This should // generally be what happens since we need to reap started // processes. if (!m_process_launch_info.GetMonitorProcessCallback ()) m_process_launch_info.SetMonitorProcessCallback(ReapDebuggedProcess, this, false); lldb_private::Error error = m_platform_sp->LaunchProcess (m_process_launch_info); if (!error.Success ()) { fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); return error; } printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID()); // add to list of spawned processes. On an lldb-gdbserver, we // would expect there to be only one. lldb::pid_t pid; if ( (pid = m_process_launch_info.GetProcessID()) != LLDB_INVALID_PROCESS_ID ) { Mutex::Locker locker (m_spawned_pids_mutex); m_spawned_pids.insert(pid); } return error; } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::SendUnimplementedResponse (const char *) { // TODO: Log the packet we aren't handling... return SendPacketNoLock ("", 0); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::SendErrorResponse (uint8_t err) { char packet[16]; int packet_len = ::snprintf (packet, sizeof(packet), "E%2.2x", err); assert (packet_len < (int)sizeof(packet)); return SendPacketNoLock (packet, packet_len); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::SendOKResponse () { return SendPacketNoLock ("OK", 2); } bool GDBRemoteCommunicationServer::HandshakeWithClient(Error *error_ptr) { return GetAck() == PacketResult::Success; } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qHostInfo (StringExtractorGDBRemote &packet) { StreamString response; // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00 ArchSpec host_arch (Host::GetArchitecture ()); const llvm::Triple &host_triple = host_arch.GetTriple(); response.PutCString("triple:"); response.PutCStringAsRawHex8(host_triple.getTriple().c_str()); response.Printf (";ptrsize:%u;",host_arch.GetAddressByteSize()); const char* distribution_id = host_arch.GetDistributionId ().AsCString (); if (distribution_id) { response.PutCString("distribution_id:"); response.PutCStringAsRawHex8(distribution_id); response.PutCString(";"); } uint32_t cpu = host_arch.GetMachOCPUType(); uint32_t sub = host_arch.GetMachOCPUSubType(); if (cpu != LLDB_INVALID_CPUTYPE) response.Printf ("cputype:%u;", cpu); if (sub != LLDB_INVALID_CPUTYPE) response.Printf ("cpusubtype:%u;", sub); if (cpu == ArchSpec::kCore_arm_any) response.Printf("watchpoint_exceptions_received:before;"); // On armv7 we use "synchronous" watchpoints which means the exception is delivered before the instruction executes. else response.Printf("watchpoint_exceptions_received:after;"); switch (lldb::endian::InlHostByteOrder()) { case eByteOrderBig: response.PutCString ("endian:big;"); break; case eByteOrderLittle: response.PutCString ("endian:little;"); break; case eByteOrderPDP: response.PutCString ("endian:pdp;"); break; default: response.PutCString ("endian:unknown;"); break; } uint32_t major = UINT32_MAX; uint32_t minor = UINT32_MAX; uint32_t update = UINT32_MAX; if (Host::GetOSVersion (major, minor, update)) { if (major != UINT32_MAX) { response.Printf("os_version:%u", major); if (minor != UINT32_MAX) { response.Printf(".%u", minor); if (update != UINT32_MAX) response.Printf(".%u", update); } response.PutChar(';'); } } std::string s; if (Host::GetOSBuildString (s)) { response.PutCString ("os_build:"); response.PutCStringAsRawHex8(s.c_str()); response.PutChar(';'); } if (Host::GetOSKernelDescription (s)) { response.PutCString ("os_kernel:"); response.PutCStringAsRawHex8(s.c_str()); response.PutChar(';'); } #if defined(__APPLE__) #if defined(__arm__) // For iOS devices, we are connected through a USB Mux so we never pretend // to actually have a hostname as far as the remote lldb that is connecting // to this lldb-platform is concerned response.PutCString ("hostname:"); response.PutCStringAsRawHex8("localhost"); response.PutChar(';'); #else // #if defined(__arm__) if (Host::GetHostname (s)) { response.PutCString ("hostname:"); response.PutCStringAsRawHex8(s.c_str()); response.PutChar(';'); } #endif // #if defined(__arm__) #else // #if defined(__APPLE__) if (Host::GetHostname (s)) { response.PutCString ("hostname:"); response.PutCStringAsRawHex8(s.c_str()); response.PutChar(';'); } #endif // #if defined(__APPLE__) return SendPacketNoLock (response.GetData(), response.GetSize()); } static void CreateProcessInfoResponse (const ProcessInstanceInfo &proc_info, StreamString &response) { response.Printf ("pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;", proc_info.GetProcessID(), proc_info.GetParentProcessID(), proc_info.GetUserID(), proc_info.GetGroupID(), proc_info.GetEffectiveUserID(), proc_info.GetEffectiveGroupID()); response.PutCString ("name:"); response.PutCStringAsRawHex8(proc_info.GetName()); response.PutChar(';'); const ArchSpec &proc_arch = proc_info.GetArchitecture(); if (proc_arch.IsValid()) { const llvm::Triple &proc_triple = proc_arch.GetTriple(); response.PutCString("triple:"); response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); response.PutChar(';'); } } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qProcessInfoPID (StringExtractorGDBRemote &packet) { // Packet format: "qProcessInfoPID:%i" where %i is the pid packet.SetFilePos(::strlen ("qProcessInfoPID:")); lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID); if (pid != LLDB_INVALID_PROCESS_ID) { ProcessInstanceInfo proc_info; if (Host::GetProcessInfo(pid, proc_info)) { StreamString response; CreateProcessInfoResponse (proc_info, response); return SendPacketNoLock (response.GetData(), response.GetSize()); } } return SendErrorResponse (1); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet) { m_proc_infos_index = 0; m_proc_infos.Clear(); ProcessInstanceInfoMatch match_info; packet.SetFilePos(::strlen ("qfProcessInfo")); if (packet.GetChar() == ':') { std::string key; std::string value; while (packet.GetNameColonValue(key, value)) { bool success = true; if (key.compare("name") == 0) { StringExtractor extractor; extractor.GetStringRef().swap(value); extractor.GetHexByteString (value); match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false); } else if (key.compare("name_match") == 0) { if (value.compare("equals") == 0) { match_info.SetNameMatchType (eNameMatchEquals); } else if (value.compare("starts_with") == 0) { match_info.SetNameMatchType (eNameMatchStartsWith); } else if (value.compare("ends_with") == 0) { match_info.SetNameMatchType (eNameMatchEndsWith); } else if (value.compare("contains") == 0) { match_info.SetNameMatchType (eNameMatchContains); } else if (value.compare("regex") == 0) { match_info.SetNameMatchType (eNameMatchRegularExpression); } else { success = false; } } else if (key.compare("pid") == 0) { match_info.GetProcessInfo().SetProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); } else if (key.compare("parent_pid") == 0) { match_info.GetProcessInfo().SetParentProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); } else if (key.compare("uid") == 0) { match_info.GetProcessInfo().SetUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); } else if (key.compare("gid") == 0) { match_info.GetProcessInfo().SetGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); } else if (key.compare("euid") == 0) { match_info.GetProcessInfo().SetEffectiveUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); } else if (key.compare("egid") == 0) { match_info.GetProcessInfo().SetEffectiveGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); } else if (key.compare("all_users") == 0) { match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success)); } else if (key.compare("triple") == 0) { match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL); } else { success = false; } if (!success) return SendErrorResponse (2); } } if (Host::FindProcesses (match_info, m_proc_infos)) { // We found something, return the first item by calling the get // subsequent process info packet handler... return Handle_qsProcessInfo (packet); } return SendErrorResponse (3); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qsProcessInfo (StringExtractorGDBRemote &packet) { if (m_proc_infos_index < m_proc_infos.GetSize()) { StreamString response; CreateProcessInfoResponse (m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response); ++m_proc_infos_index; return SendPacketNoLock (response.GetData(), response.GetSize()); } return SendErrorResponse (4); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qUserName (StringExtractorGDBRemote &packet) { // Packet format: "qUserName:%i" where %i is the uid packet.SetFilePos(::strlen ("qUserName:")); uint32_t uid = packet.GetU32 (UINT32_MAX); if (uid != UINT32_MAX) { std::string name; if (Host::GetUserName (uid, name)) { StreamString response; response.PutCStringAsRawHex8 (name.c_str()); return SendPacketNoLock (response.GetData(), response.GetSize()); } } return SendErrorResponse (5); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet) { // Packet format: "qGroupName:%i" where %i is the gid packet.SetFilePos(::strlen ("qGroupName:")); uint32_t gid = packet.GetU32 (UINT32_MAX); if (gid != UINT32_MAX) { std::string name; if (Host::GetGroupName (gid, name)) { StreamString response; response.PutCStringAsRawHex8 (name.c_str()); return SendPacketNoLock (response.GetData(), response.GetSize()); } } return SendErrorResponse (6); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qSpeedTest (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("qSpeedTest:")); std::string key; std::string value; bool success = packet.GetNameColonValue(key, value); if (success && key.compare("response_size") == 0) { uint32_t response_size = Args::StringToUInt32(value.c_str(), 0, 0, &success); if (success) { if (response_size == 0) return SendOKResponse(); StreamString response; uint32_t bytes_left = response_size; response.PutCString("data:"); while (bytes_left > 0) { if (bytes_left >= 26) { response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); bytes_left -= 26; } else { response.Printf ("%*.*s;", bytes_left, bytes_left, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); bytes_left = 0; } } return SendPacketNoLock (response.GetData(), response.GetSize()); } } return SendErrorResponse (7); } static void * AcceptPortFromInferior (void *arg) { const char *connect_url = (const char *)arg; ConnectionFileDescriptor file_conn; Error error; if (file_conn.Connect (connect_url, &error) == eConnectionStatusSuccess) { char pid_str[256]; ::memset (pid_str, 0, sizeof(pid_str)); ConnectionStatus status; const size_t pid_str_len = file_conn.Read (pid_str, sizeof(pid_str), 0, status, NULL); if (pid_str_len > 0) { int pid = atoi (pid_str); return (void *)(intptr_t)pid; } } return NULL; } // //static bool //WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds) //{ // const int time_delta_usecs = 100000; // const int num_retries = timeout_in_seconds/time_delta_usecs; // for (int i=0; i 0) { // Decode the decimal argument string length. This length is the // number of hex nibbles in the argument string value. const uint32_t arg_len = packet.GetU32(UINT32_MAX); if (arg_len == UINT32_MAX) success = false; else { // Make sure the argument hex string length is followed by a comma if (packet.GetChar() != ',') success = false; else { // Decode the argument index. We ignore this really becuase // who would really send down the arguments in a random order??? const uint32_t arg_idx = packet.GetU32(UINT32_MAX); if (arg_idx == UINT32_MAX) success = false; else { // Make sure the argument index is followed by a comma if (packet.GetChar() != ',') success = false; else { // Decode the argument string value from hex bytes // back into a UTF8 string and make sure the length // matches the one supplied in the packet std::string arg; if (packet.GetHexByteString(arg) != (arg_len / 2)) success = false; else { // If there are any bytes lft if (packet.GetBytesLeft()) { if (packet.GetChar() != ',') success = false; } if (success) { if (arg_idx == 0) m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false); m_process_launch_info.GetArguments().AppendArgument(arg.c_str()); } } } } } } } if (success) { // FIXME: remove linux restriction once eLaunchFlagDebug is supported #if !defined (__linux__) m_process_launch_info.GetFlags().Set (eLaunchFlagDebug); #endif m_process_launch_error = LaunchProcess (); if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) { return SendOKResponse (); } } return SendErrorResponse (8); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet) { lldb::pid_t pid = m_process_launch_info.GetProcessID(); StreamString response; response.Printf("QC%" PRIx64, pid); if (m_is_platform) { // If we launch a process and this GDB server is acting as a platform, // then we need to clear the process launch state so we can start // launching another process. In order to launch a process a bunch or // packets need to be sent: environment packets, working directory, // disable ASLR, and many more settings. When we launch a process we // then need to know when to clear this information. Currently we are // selecting the 'qC' packet as that packet which seems to make the most // sense. if (pid != LLDB_INVALID_PROCESS_ID) { m_process_launch_info.Clear(); } } return SendPacketNoLock (response.GetData(), response.GetSize()); } bool GDBRemoteCommunicationServer::DebugserverProcessReaped (lldb::pid_t pid) { Mutex::Locker locker (m_spawned_pids_mutex); FreePortForProcess(pid); return m_spawned_pids.erase(pid) > 0; } bool GDBRemoteCommunicationServer::ReapDebugserverProcess (void *callback_baton, lldb::pid_t pid, bool exited, int signal, // Zero for no signal int status) // Exit value of process if signal is zero { GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; server->DebugserverProcessReaped (pid); return true; } bool GDBRemoteCommunicationServer::DebuggedProcessReaped (lldb::pid_t pid) { // reap a process that we were debugging (but not debugserver) Mutex::Locker locker (m_spawned_pids_mutex); return m_spawned_pids.erase(pid) > 0; } bool GDBRemoteCommunicationServer::ReapDebuggedProcess (void *callback_baton, lldb::pid_t pid, bool exited, int signal, // Zero for no signal int status) // Exit value of process if signal is zero { GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; server->DebuggedProcessReaped (pid); return true; } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet) { #ifdef _WIN32 return SendErrorResponse(9); #else // Spawn a local debugserver as a platform so we can then attach or launch // a process... if (m_is_platform) { // Sleep and wait a bit for debugserver to start to listen... ConnectionFileDescriptor file_conn; Error error; std::string hostname; // TODO: /tmp/ should not be hardcoded. User might want to override /tmp // with the TMPDIR environnement variable packet.SetFilePos(::strlen ("qLaunchGDBServer;")); std::string name; std::string value; uint16_t port = UINT16_MAX; while (packet.GetNameColonValue(name, value)) { if (name.compare ("host") == 0) hostname.swap(value); else if (name.compare ("port") == 0) port = Args::StringToUInt32(value.c_str(), 0, 0); } if (port == UINT16_MAX) port = GetNextAvailablePort(); // Spawn a new thread to accept the port that gets bound after // binding to port 0 (zero). if (error.Success()) { // Spawn a debugserver and try to get the port it listens to. ProcessLaunchInfo debugserver_launch_info; if (hostname.empty()) hostname = "localhost"; Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); if (log) log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port); debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false); error = StartDebugserverProcess (hostname.empty() ? NULL : hostname.c_str(), port, debugserver_launch_info, port); lldb::pid_t debugserver_pid = debugserver_launch_info.GetProcessID(); if (debugserver_pid != LLDB_INVALID_PROCESS_ID) { Mutex::Locker locker (m_spawned_pids_mutex); m_spawned_pids.insert(debugserver_pid); if (port > 0) AssociatePortWithProcess(port, debugserver_pid); } else { if (port > 0) FreePort (port); } if (error.Success()) { char response[256]; const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset); assert (response_len < sizeof(response)); PacketResult packet_result = SendPacketNoLock (response, response_len); if (packet_result != PacketResult::Success) { if (debugserver_pid != LLDB_INVALID_PROCESS_ID) ::kill (debugserver_pid, SIGINT); } return packet_result; } } } return SendErrorResponse (9); #endif } bool GDBRemoteCommunicationServer::KillSpawnedProcess (lldb::pid_t pid) { // make sure we know about this process { Mutex::Locker locker (m_spawned_pids_mutex); if (m_spawned_pids.find(pid) == m_spawned_pids.end()) return false; } // first try a SIGTERM (standard kill) Host::Kill (pid, SIGTERM); // check if that worked for (size_t i=0; i<10; ++i) { { Mutex::Locker locker (m_spawned_pids_mutex); if (m_spawned_pids.find(pid) == m_spawned_pids.end()) { // it is now killed return true; } } usleep (10000); } // check one more time after the final usleep { Mutex::Locker locker (m_spawned_pids_mutex); if (m_spawned_pids.find(pid) == m_spawned_pids.end()) return true; } // the launched process still lives. Now try killling it again, // this time with an unblockable signal. Host::Kill (pid, SIGKILL); for (size_t i=0; i<10; ++i) { { Mutex::Locker locker (m_spawned_pids_mutex); if (m_spawned_pids.find(pid) == m_spawned_pids.end()) { // it is now killed return true; } } usleep (10000); } // check one more time after the final usleep // Scope for locker { Mutex::Locker locker (m_spawned_pids_mutex); if (m_spawned_pids.find(pid) == m_spawned_pids.end()) return true; } // no luck - the process still lives return false; } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qKillSpawnedProcess (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("qKillSpawnedProcess:")); lldb::pid_t pid = packet.GetU64(LLDB_INVALID_PROCESS_ID); // verify that we know anything about this pid. // Scope for locker { Mutex::Locker locker (m_spawned_pids_mutex); if (m_spawned_pids.find(pid) == m_spawned_pids.end()) { // not a pid we know about return SendErrorResponse (10); } } // go ahead and attempt to kill the spawned process if (KillSpawnedProcess (pid)) return SendOKResponse (); else return SendErrorResponse (11); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_k (StringExtractorGDBRemote &packet) { // ignore for now if we're lldb_platform if (m_is_platform) return SendUnimplementedResponse (packet.GetStringRef().c_str()); // shutdown all spawned processes std::set spawned_pids_copy; // copy pids { Mutex::Locker locker (m_spawned_pids_mutex); spawned_pids_copy.insert (m_spawned_pids.begin (), m_spawned_pids.end ()); } // nuke the spawned processes for (auto it = spawned_pids_copy.begin (); it != spawned_pids_copy.end (); ++it) { lldb::pid_t spawned_pid = *it; if (!KillSpawnedProcess (spawned_pid)) { fprintf (stderr, "%s: failed to kill spawned pid %" PRIu64 ", ignoring.\n", __FUNCTION__, spawned_pid); } } // TODO figure out how to shut down gracefully at this point return SendOKResponse (); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qLaunchSuccess (StringExtractorGDBRemote &packet) { if (m_process_launch_error.Success()) return SendOKResponse(); StreamString response; response.PutChar('E'); response.PutCString(m_process_launch_error.AsCString("")); return SendPacketNoLock (response.GetData(), response.GetSize()); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QEnvironment (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QEnvironment:")); const uint32_t bytes_left = packet.GetBytesLeft(); if (bytes_left > 0) { m_process_launch_info.GetEnvironmentEntries ().AppendArgument (packet.Peek()); return SendOKResponse (); } return SendErrorResponse (12); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QLaunchArch (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QLaunchArch:")); const uint32_t bytes_left = packet.GetBytesLeft(); if (bytes_left > 0) { const char* arch_triple = packet.Peek(); ArchSpec arch_spec(arch_triple,NULL); m_process_launch_info.SetArchitecture(arch_spec); return SendOKResponse(); } return SendErrorResponse(13); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QSetDisableASLR:")); if (packet.GetU32(0)) m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR); else m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR); return SendOKResponse (); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QSetWorkingDir:")); std::string path; packet.GetHexByteString(path); if (m_is_platform) { #ifdef _WIN32 // Not implemented on Windows return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_QSetWorkingDir unimplemented"); #else // If this packet is sent to a platform, then change the current working directory if (::chdir(path.c_str()) != 0) return SendErrorResponse(errno); #endif } else { m_process_launch_info.SwapWorkingDirectory (path); } return SendOKResponse (); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet) { StreamString response; if (m_is_platform) { // If this packet is sent to a platform, then change the current working directory char cwd[PATH_MAX]; if (getcwd(cwd, sizeof(cwd)) == NULL) { return SendErrorResponse(errno); } else { response.PutBytesAsRawHex8(cwd, strlen(cwd)); return SendPacketNoLock(response.GetData(), response.GetSize()); } } else { const char *working_dir = m_process_launch_info.GetWorkingDirectory(); if (working_dir && working_dir[0]) { response.PutBytesAsRawHex8(working_dir, strlen(working_dir)); return SendPacketNoLock(response.GetData(), response.GetSize()); } else { return SendErrorResponse(14); } } } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QSetSTDIN (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QSetSTDIN:")); ProcessLaunchInfo::FileAction file_action; std::string path; packet.GetHexByteString(path); const bool read = false; const bool write = true; if (file_action.Open(STDIN_FILENO, path.c_str(), read, write)) { m_process_launch_info.AppendFileAction(file_action); return SendOKResponse (); } return SendErrorResponse (15); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QSetSTDOUT (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QSetSTDOUT:")); ProcessLaunchInfo::FileAction file_action; std::string path; packet.GetHexByteString(path); const bool read = true; const bool write = false; if (file_action.Open(STDOUT_FILENO, path.c_str(), read, write)) { m_process_launch_info.AppendFileAction(file_action); return SendOKResponse (); } return SendErrorResponse (16); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QSetSTDERR (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen ("QSetSTDERR:")); ProcessLaunchInfo::FileAction file_action; std::string path; packet.GetHexByteString(path); const bool read = true; const bool write = false; if (file_action.Open(STDERR_FILENO, path.c_str(), read, write)) { m_process_launch_info.AppendFileAction(file_action); return SendOKResponse (); } return SendErrorResponse (17); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QStartNoAckMode (StringExtractorGDBRemote &packet) { // Send response first before changing m_send_acks to we ack this packet PacketResult packet_result = SendOKResponse (); m_send_acks = false; return packet_result; } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qPlatform_mkdir (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("qPlatform_mkdir:")); mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); if (packet.GetChar() == ',') { std::string path; packet.GetHexByteString(path); Error error = Host::MakeDirectory(path.c_str(),mode); if (error.Success()) return SendPacketNoLock ("OK", 2); else return SendErrorResponse(error.GetError()); } return SendErrorResponse(20); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("qPlatform_chmod:")); mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); if (packet.GetChar() == ',') { std::string path; packet.GetHexByteString(path); Error error = Host::SetFilePermissions (path.c_str(), mode); if (error.Success()) return SendPacketNoLock ("OK", 2); else return SendErrorResponse(error.GetError()); } return SendErrorResponse(19); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:open:")); std::string path; packet.GetHexByteStringTerminatedBy(path,','); if (!path.empty()) { if (packet.GetChar() == ',') { uint32_t flags = packet.GetHexMaxU32(false, 0); if (packet.GetChar() == ',') { mode_t mode = packet.GetHexMaxU32(false, 0600); Error error; int fd = ::open (path.c_str(), flags, mode); const int save_errno = fd == -1 ? errno : 0; StreamString response; response.PutChar('F'); response.Printf("%i", fd); if (save_errno) response.Printf(",%i", save_errno); return SendPacketNoLock(response.GetData(), response.GetSize()); } } } return SendErrorResponse(18); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_Close (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:close:")); int fd = packet.GetS32(-1); Error error; int err = -1; int save_errno = 0; if (fd >= 0) { err = close(fd); save_errno = err == -1 ? errno : 0; } else { save_errno = EINVAL; } StreamString response; response.PutChar('F'); response.Printf("%i", err); if (save_errno) response.Printf(",%i", save_errno); return SendPacketNoLock(response.GetData(), response.GetSize()); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet) { #ifdef _WIN32 // Not implemented on Windows return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented"); #else StreamGDBRemote response; packet.SetFilePos(::strlen("vFile:pread:")); int fd = packet.GetS32(-1); if (packet.GetChar() == ',') { uint64_t count = packet.GetU64(UINT64_MAX); if (packet.GetChar() == ',') { uint64_t offset = packet.GetU64(UINT32_MAX); if (count == UINT64_MAX) { response.Printf("F-1:%i", EINVAL); return SendPacketNoLock(response.GetData(), response.GetSize()); } std::string buffer(count, 0); const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset); const int save_errno = bytes_read == -1 ? errno : 0; response.PutChar('F'); response.Printf("%zi", bytes_read); if (save_errno) response.Printf(",%i", save_errno); else { response.PutChar(';'); response.PutEscapedBytes(&buffer[0], bytes_read); } return SendPacketNoLock(response.GetData(), response.GetSize()); } } return SendErrorResponse(21); #endif } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_pWrite (StringExtractorGDBRemote &packet) { #ifdef _WIN32 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pWrite() unimplemented"); #else packet.SetFilePos(::strlen("vFile:pwrite:")); StreamGDBRemote response; response.PutChar('F'); int fd = packet.GetU32(UINT32_MAX); if (packet.GetChar() == ',') { off_t offset = packet.GetU64(UINT32_MAX); if (packet.GetChar() == ',') { std::string buffer; if (packet.GetEscapedBinaryData(buffer)) { const ssize_t bytes_written = ::pwrite (fd, buffer.data(), buffer.size(), offset); const int save_errno = bytes_written == -1 ? errno : 0; response.Printf("%zi", bytes_written); if (save_errno) response.Printf(",%i", save_errno); } else { response.Printf ("-1,%i", EINVAL); } return SendPacketNoLock(response.GetData(), response.GetSize()); } } return SendErrorResponse(27); #endif } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_Size (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:size:")); std::string path; packet.GetHexByteString(path); if (!path.empty()) { lldb::user_id_t retcode = Host::GetFileSize(FileSpec(path.c_str(), false)); StreamString response; response.PutChar('F'); response.PutHex64(retcode); if (retcode == UINT64_MAX) { response.PutChar(','); response.PutHex64(retcode); // TODO: replace with Host::GetSyswideErrorCode() } return SendPacketNoLock(response.GetData(), response.GetSize()); } return SendErrorResponse(22); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_Mode (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:mode:")); std::string path; packet.GetHexByteString(path); if (!path.empty()) { Error error; const uint32_t mode = File::GetPermissions(path.c_str(), error); StreamString response; response.Printf("F%u", mode); if (mode == 0 || error.Fail()) response.Printf(",%i", (int)error.GetError()); return SendPacketNoLock(response.GetData(), response.GetSize()); } return SendErrorResponse(23); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_Exists (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:exists:")); std::string path; packet.GetHexByteString(path); if (!path.empty()) { bool retcode = Host::GetFileExists(FileSpec(path.c_str(), false)); StreamString response; response.PutChar('F'); response.PutChar(','); if (retcode) response.PutChar('1'); else response.PutChar('0'); return SendPacketNoLock(response.GetData(), response.GetSize()); } return SendErrorResponse(24); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_symlink (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:symlink:")); std::string dst, src; packet.GetHexByteStringTerminatedBy(dst, ','); packet.GetChar(); // Skip ',' char packet.GetHexByteString(src); Error error = Host::Symlink(src.c_str(), dst.c_str()); StreamString response; response.Printf("F%u,%u", error.GetError(), error.GetError()); return SendPacketNoLock(response.GetData(), response.GetSize()); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_unlink (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:unlink:")); std::string path; packet.GetHexByteString(path); Error error = Host::Unlink(path.c_str()); StreamString response; response.Printf("F%u,%u", error.GetError(), error.GetError()); return SendPacketNoLock(response.GetData(), response.GetSize()); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_qPlatform_shell (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("qPlatform_shell:")); std::string path; std::string working_dir; packet.GetHexByteStringTerminatedBy(path,','); if (!path.empty()) { if (packet.GetChar() == ',') { // FIXME: add timeout to qPlatform_shell packet // uint32_t timeout = packet.GetHexMaxU32(false, 32); uint32_t timeout = 10; if (packet.GetChar() == ',') packet.GetHexByteString(working_dir); int status, signo; std::string output; Error err = Host::RunShellCommand(path.c_str(), working_dir.empty() ? NULL : working_dir.c_str(), &status, &signo, &output, timeout); StreamGDBRemote response; if (err.Fail()) { response.PutCString("F,"); response.PutHex32(UINT32_MAX); } else { response.PutCString("F,"); response.PutHex32(status); response.PutChar(','); response.PutHex32(signo); response.PutChar(','); response.PutEscapedBytes(output.c_str(), output.size()); } return SendPacketNoLock(response.GetData(), response.GetSize()); } } return SendErrorResponse(24); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_Stat (StringExtractorGDBRemote &packet) { return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_Stat() unimplemented"); } GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_vFile_MD5 (StringExtractorGDBRemote &packet) { packet.SetFilePos(::strlen("vFile:MD5:")); std::string path; packet.GetHexByteString(path); if (!path.empty()) { uint64_t a,b; StreamGDBRemote response; if (Host::CalculateMD5(FileSpec(path.c_str(),false),a,b) == false) { response.PutCString("F,"); response.PutCString("x"); } else { response.PutCString("F,"); response.PutHex64(a); response.PutHex64(b); } return SendPacketNoLock(response.GetData(), response.GetSize()); } return SendErrorResponse(25); }