GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerPlatform::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);
}
bool
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
GDBRemoteCommunicationServerCommon::Handle_qUserName(
StringExtractorGDBRemote &packet) {
#if !defined(LLDB_DISABLE_POSIX)
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf("GDBRemoteCommunicationServerCommon::%s begin", __FUNCTION__);
// Packet format: "qUserName:%i" where %i is the uid
packet.SetFilePos(::strlen("qUserName:"******"GDBRemoteCommunicationServerCommon::%s end", __FUNCTION__);
#endif
return SendErrorResponse(5);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite (StringExtractorGDBRemote &packet)
{
#ifdef _WIN32
return SendUnimplementedResponse("GDBRemoteCommunicationServerCommon::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
GDBRemoteCommunicationServerCommon::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(), FileSpec{working_dir, true},
&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.GetString());
}
}
return SendErrorResponse(24);
}
bool
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 SendPacket (response);
}
}
return SendErrorResponse (7);
}
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
GDBRemoteCommunicationServerPlatform::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...
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("GDBRemoteCommunicationServerPlatform::%s() called",
__FUNCTION__);
ConnectionFileDescriptor file_conn;
std::string hostname;
packet.SetFilePos(::strlen("qLaunchGDBServer;"));
llvm::StringRef name;
llvm::StringRef value;
uint16_t port = UINT16_MAX;
while (packet.GetNameColonValue(name, value)) {
if (name.equals("host"))
hostname = value;
else if (name.equals("port"))
value.getAsInteger(0, port);
}
lldb::pid_t debugserver_pid = LLDB_INVALID_PROCESS_ID;
std::string socket_name;
Status error =
LaunchGDBServer(Args(), hostname, debugserver_pid, port, socket_name);
if (error.Fail()) {
if (log)
log->Printf("GDBRemoteCommunicationServerPlatform::%s() debugserver "
"launch failed: %s",
__FUNCTION__, error.AsCString());
return SendErrorResponse(9);
}
if (log)
log->Printf("GDBRemoteCommunicationServerPlatform::%s() debugserver "
"launched successfully as pid %" PRIu64,
__FUNCTION__, debugserver_pid);
StreamGDBRemote response;
response.Printf("pid:%" PRIu64 ";port:%u;", debugserver_pid,
port + m_port_offset);
if (!socket_name.empty()) {
response.PutCString("socket_name:");
response.PutCStringAsRawHex8(socket_name.c_str());
response.PutChar(';');
}
PacketResult packet_result = SendPacketNoLock(response.GetString());
if (packet_result != PacketResult::Success) {
if (debugserver_pid != LLDB_INVALID_PROCESS_ID)
::kill(debugserver_pid, SIGINT);
}
return packet_result;
#endif
}
bool
GDBRemoteCommunication::CheckForPacket (const uint8_t *src, size_t src_len, StringExtractorGDBRemote &packet)
{
// Put the packet data into the buffer in a thread safe fashion
Mutex::Locker locker(m_bytes_mutex);
Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PACKETS));
if (src && src_len > 0)
{
if (log && log->GetVerbose())
{
StreamString s;
log->Printf ("GDBRemoteCommunication::%s adding %u bytes: %.*s",
__FUNCTION__,
(uint32_t)src_len,
(uint32_t)src_len,
src);
}
m_bytes.append ((const char *)src, src_len);
}
// Parse up the packets into gdb remote packets
if (!m_bytes.empty())
{
// end_idx must be one past the last valid packet byte. Start
// it off with an invalid value that is the same as the current
// index.
size_t content_start = 0;
size_t content_length = 0;
size_t total_length = 0;
size_t checksum_idx = std::string::npos;
switch (m_bytes[0])
{
case '+': // Look for ack
case '-': // Look for cancel
case '\x03': // ^C to halt target
content_length = total_length = 1; // The command is one byte long...
break;
case '$':
// Look for a standard gdb packet?
{
size_t hash_pos = m_bytes.find('#');
if (hash_pos != std::string::npos)
{
if (hash_pos + 2 < m_bytes.size())
{
checksum_idx = hash_pos + 1;
// Skip the dollar sign
content_start = 1;
// Don't include the # in the content or the $ in the content length
content_length = hash_pos - 1;
total_length = hash_pos + 3; // Skip the # and the two hex checksum bytes
}
else
{
// Checksum bytes aren't all here yet
content_length = std::string::npos;
}
}
}
break;
default:
{
// We have an unexpected byte and we need to flush all bad
// data that is in m_bytes, so we need to find the first
// byte that is a '+' (ACK), '-' (NACK), \x03 (CTRL+C interrupt),
// or '$' character (start of packet header) or of course,
// the end of the data in m_bytes...
const size_t bytes_len = m_bytes.size();
bool done = false;
uint32_t idx;
for (idx = 1; !done && idx < bytes_len; ++idx)
{
switch (m_bytes[idx])
{
case '+':
case '-':
case '\x03':
case '$':
done = true;
break;
default:
break;
}
}
if (log)
log->Printf ("GDBRemoteCommunication::%s tossing %u junk bytes: '%.*s'",
__FUNCTION__, idx, idx, m_bytes.c_str());
m_bytes.erase(0, idx);
}
break;
}
if (content_length == std::string::npos)
{
packet.Clear();
return false;
}
else if (total_length > 0)
{
// We have a valid packet...
assert (content_length <= m_bytes.size());
assert (total_length <= m_bytes.size());
assert (content_length <= total_length);
bool success = true;
std::string &packet_str = packet.GetStringRef();
if (log)
{
// If logging was just enabled and we have history, then dump out what
// we have to the log so we get the historical context. The Dump() call that
// logs all of the packet will set a boolean so that we don't dump this more
// than once
if (!m_history.DidDumpToLog ())
m_history.Dump (log);
log->Printf("<%4" PRIu64 "> read packet: %.*s", (uint64_t)total_length, (int)(total_length), m_bytes.c_str());
}
m_history.AddPacket (m_bytes.c_str(), total_length, History::ePacketTypeRecv, total_length);
// Clear packet_str in case there is some existing data in it.
packet_str.clear();
// Copy the packet from m_bytes to packet_str expanding the
// run-length encoding in the process.
// Reserve enough byte for the most common case (no RLE used)
packet_str.reserve(m_bytes.length());
for (std::string::const_iterator c = m_bytes.begin() + content_start; c != m_bytes.begin() + content_start + content_length; ++c)
{
if (*c == '*')
{
// '*' indicates RLE. Next character will give us the
// repeat count and previous character is what is to be
// repeated.
char char_to_repeat = packet_str.back();
// Number of time the previous character is repeated
int repeat_count = *++c + 3 - ' ';
// We have the char_to_repeat and repeat_count. Now push
// it in the packet.
for (int i = 0; i < repeat_count; ++i)
packet_str.push_back(char_to_repeat);
}
else
{
packet_str.push_back(*c);
}
}
if (m_bytes[0] == '$')
{
assert (checksum_idx < m_bytes.size());
if (::isxdigit (m_bytes[checksum_idx+0]) ||
::isxdigit (m_bytes[checksum_idx+1]))
{
if (GetSendAcks ())
{
const char *packet_checksum_cstr = &m_bytes[checksum_idx];
char packet_checksum = strtol (packet_checksum_cstr, NULL, 16);
char actual_checksum = CalculcateChecksum (packet_str.c_str(), packet_str.size());
success = packet_checksum == actual_checksum;
if (!success)
{
if (log)
log->Printf ("error: checksum mismatch: %.*s expected 0x%2.2x, got 0x%2.2x",
(int)(total_length),
m_bytes.c_str(),
(uint8_t)packet_checksum,
(uint8_t)actual_checksum);
}
// Send the ack or nack if needed
if (!success)
SendNack();
else
SendAck();
}
}
else
{
success = false;
if (log)
log->Printf ("error: invalid checksum in packet: '%s'\n", m_bytes.c_str());
}
}
m_bytes.erase(0, total_length);
packet.SetFilePos(0);
return success;
}
}
packet.Clear();
return false;
}
bool
GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet)
{
#ifdef _WIN32
// No unix sockets on windows
return false;
#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;
char connect_url[PATH_MAX];
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).
lldb::thread_t accept_thread = LLDB_INVALID_HOST_THREAD;
const char *unix_socket_name = NULL;
char unix_socket_name_buf[PATH_MAX] = "/tmp/XXXXXXXXX";
if (port == 0)
{
if (::mkstemp (unix_socket_name_buf) == 0)
{
unix_socket_name = unix_socket_name_buf;
::snprintf (connect_url, sizeof(connect_url), "unix-accept://%s", unix_socket_name);
accept_thread = Host::ThreadCreate (unix_socket_name,
AcceptPortFromInferior,
connect_url,
&error);
}
else
{
error.SetErrorStringWithFormat("failed to make temporary path for a unix socket: %s", strerror(errno));
}
}
if (error.Success())
{
// Spawn a debugserver and try to get the port it listens to.
ProcessLaunchInfo debugserver_launch_info;
StreamString host_and_port;
if (hostname.empty())
hostname = "localhost";
host_and_port.Printf("%s:%u", hostname.c_str(), port);
const char *host_and_port_cstr = host_and_port.GetString().c_str();
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("Launching debugserver with: %s...\n", host_and_port_cstr);
debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false);
error = StartDebugserverProcess (host_and_port_cstr,
unix_socket_name,
debugserver_launch_info);
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())
{
bool success = false;
if (IS_VALID_LLDB_HOST_THREAD(accept_thread))
{
thread_result_t accept_thread_result = NULL;
if (Host::ThreadJoin (accept_thread, &accept_thread_result, &error))
{
if (accept_thread_result)
{
port = (intptr_t)accept_thread_result;
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));
//m_port_to_pid_map[port] = debugserver_launch_info.GetProcessID();
success = SendPacketNoLock (response, response_len) > 0;
}
}
}
else
{
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));
//m_port_to_pid_map[port] = debugserver_launch_info.GetProcessID();
success = SendPacketNoLock (response, response_len) > 0;
}
Host::Unlink (unix_socket_name);
if (!success)
{
if (debugserver_pid != LLDB_INVALID_PROCESS_ID)
::kill (debugserver_pid, SIGINT);
}
return success;
}
else if (accept_thread)
{
Host::Unlink (unix_socket_name);
}
}
}
return SendErrorResponse (9);
#endif
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_A(StringExtractorGDBRemote &packet) {
// The 'A' packet is the most over designed packet ever here with
// redundant argument indexes, redundant argument lengths and needed hex
// encoded argument string values. Really all that is needed is a comma
// separated hex encoded argument value list, but we will stay true to the
// documented version of the 'A' packet here...
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
int actual_arg_index = 0;
packet.SetFilePos(1); // Skip the 'A'
bool success = true;
while (success && packet.GetBytesLeft() > 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 because
// 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.GetHexByteStringFixedLength(arg, arg_len) !=
(arg_len / 2))
success = false;
else {
// If there are any bytes left
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);
if (log)
log->Printf("LLGSPacketHandler::%s added arg %d: \"%s\"",
__FUNCTION__, actual_arg_index, arg.c_str());
++actual_arg_index;
}
}
}
}
}
}
}
if (success) {
m_process_launch_error = LaunchProcess();
if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) {
return SendOKResponse();
} else {
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf("LLGSPacketHandler::%s failed to launch exe: %s",
__FUNCTION__, m_process_launch_error.AsCString());
}
}
return SendErrorResponse(8);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo(
StringExtractorGDBRemote &packet) {
m_proc_infos_index = 0;
m_proc_infos.Clear();
ProcessInstanceInfoMatch match_info;
packet.SetFilePos(::strlen("qfProcessInfo"));
if (packet.GetChar() == ':') {
llvm::StringRef key;
llvm::StringRef value;
while (packet.GetNameColonValue(key, value)) {
bool success = true;
if (key.equals("name")) {
StringExtractor extractor(value);
std::string file;
extractor.GetHexByteString(file);
match_info.GetProcessInfo().GetExecutableFile().SetFile(file.c_str(),
false);
} else if (key.equals("name_match")) {
NameMatchType name_match =
llvm::StringSwitch<NameMatchType>(value)
.Case("equals", eNameMatchEquals)
.Case("starts_with", eNameMatchStartsWith)
.Case("ends_with", eNameMatchEndsWith)
.Case("contains", eNameMatchContains)
.Case("regex", eNameMatchRegularExpression)
.Default(eNameMatchIgnore);
match_info.SetNameMatchType(name_match);
if (name_match == eNameMatchIgnore)
return SendErrorResponse(2);
} else if (key.equals("pid")) {
lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
if (value.getAsInteger(0, pid))
return SendErrorResponse(2);
match_info.GetProcessInfo().SetProcessID(pid);
} else if (key.equals("parent_pid")) {
lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
if (value.getAsInteger(0, pid))
return SendErrorResponse(2);
match_info.GetProcessInfo().SetParentProcessID(pid);
} else if (key.equals("uid")) {
uint32_t uid = UINT32_MAX;
if (value.getAsInteger(0, uid))
return SendErrorResponse(2);
match_info.GetProcessInfo().SetUserID(uid);
} else if (key.equals("gid")) {
uint32_t gid = UINT32_MAX;
if (value.getAsInteger(0, gid))
return SendErrorResponse(2);
match_info.GetProcessInfo().SetGroupID(gid);
} else if (key.equals("euid")) {
uint32_t uid = UINT32_MAX;
if (value.getAsInteger(0, uid))
return SendErrorResponse(2);
match_info.GetProcessInfo().SetEffectiveUserID(uid);
} else if (key.equals("egid")) {
uint32_t gid = UINT32_MAX;
if (value.getAsInteger(0, gid))
return SendErrorResponse(2);
match_info.GetProcessInfo().SetEffectiveGroupID(gid);
} else if (key.equals("all_users")) {
match_info.SetMatchAllUsers(
Args::StringToBoolean(value, false, &success));
} else if (key.equals("triple")) {
match_info.GetProcessInfo().GetArchitecture().SetTriple(
value.str().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
GDBRemoteCommunicationServerPlatform::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...
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf ("GDBRemoteCommunicationServerPlatform::%s() called", __FUNCTION__);
// Sleep and wait a bit for debugserver to start to listen...
ConnectionFileDescriptor file_conn;
std::string hostname;
// TODO: /tmp/ should not be hardcoded. User might want to override /tmp
// with the TMPDIR environment 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 = StringConvert::ToUInt32(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).
// ignore the hostname send from the remote end, just use the ip address
// that we're currently communicating with as the hostname
// Spawn a debugserver and try to get the port it listens to.
ProcessLaunchInfo debugserver_launch_info;
if (hostname.empty())
hostname = "127.0.0.1";
if (log)
log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port);
// Do not run in a new session so that it can not linger after the
// platform closes.
debugserver_launch_info.SetLaunchInSeparateProcessGroup(false);
debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false);
std::string platform_scheme;
std::string platform_ip;
int platform_port;
std::string platform_path;
bool ok = UriParser::Parse(GetConnection()->GetURI().c_str(), platform_scheme, platform_ip, platform_port, platform_path);
assert(ok);
Error error = StartDebugserverProcess (
platform_ip.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())
{
if (log)
log->Printf ("GDBRemoteCommunicationServerPlatform::%s() debugserver launched successfully as pid %" PRIu64, __FUNCTION__, debugserver_pid);
char response[256];
const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset);
assert (response_len < (int)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;
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServerPlatform::%s() debugserver launch failed: %s", __FUNCTION__, error.AsCString ());
}
return SendErrorResponse (9);
#endif
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_A (StringExtractorGDBRemote &packet)
{
// The 'A' packet is the most over designed packet ever here with
// redundant argument indexes, redundant argument lengths and needed hex
// encoded argument string values. Really all that is needed is a comma
// separated hex encoded argument value list, but we will stay true to the
// documented version of the 'A' packet here...
packet.SetFilePos(1); // Skip the 'A'
bool success = true;
while (success && packet.GetBytesLeft() > 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)
{
m_process_launch_info.GetFlags().Set (eLaunchFlagDebug);
m_process_launch_error = Host::LaunchProcess (m_process_launch_info);
if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID)
{
return SendOKResponse ();
}
}
return SendErrorResponse (8);
}
StateType GDBRemoteClientBase::SendContinuePacketAndWaitForResponse(
ContinueDelegate &delegate, const UnixSignals &signals,
llvm::StringRef payload, StringExtractorGDBRemote &response) {
Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
response.Clear();
{
std::lock_guard<std::mutex> lock(m_mutex);
m_continue_packet = payload;
m_should_stop = false;
}
ContinueLock cont_lock(*this);
if (!cont_lock)
return eStateInvalid;
OnRunPacketSent(true);
for (;;) {
PacketResult read_result = ReadPacket(response, kInterruptTimeout, false);
switch (read_result) {
case PacketResult::ErrorReplyTimeout: {
std::lock_guard<std::mutex> lock(m_mutex);
if (m_async_count == 0)
continue;
if (steady_clock::now() >= m_interrupt_time + kInterruptTimeout)
return eStateInvalid;
}
case PacketResult::Success:
break;
default:
if (log)
log->Printf("GDBRemoteClientBase::%s () ReadPacket(...) => false",
__FUNCTION__);
return eStateInvalid;
}
if (response.Empty())
return eStateInvalid;
const char stop_type = response.GetChar();
if (log)
log->Printf("GDBRemoteClientBase::%s () got packet: %s", __FUNCTION__,
response.GetStringRef().c_str());
switch (stop_type) {
case 'W':
case 'X':
return eStateExited;
case 'E':
// ERROR
return eStateInvalid;
default:
if (log)
log->Printf("GDBRemoteClientBase::%s () unrecognized async packet",
__FUNCTION__);
return eStateInvalid;
case 'O': {
std::string inferior_stdout;
response.GetHexByteString(inferior_stdout);
delegate.HandleAsyncStdout(inferior_stdout);
break;
}
case 'A':
delegate.HandleAsyncMisc(
llvm::StringRef(response.GetStringRef()).substr(1));
break;
case 'J':
delegate.HandleAsyncStructuredDataPacket(response.GetStringRef());
break;
case 'T':
case 'S':
// Do this with the continue lock held.
const bool should_stop = ShouldStop(signals, response);
response.SetFilePos(0);
// The packet we should resume with. In the future
// we should check our thread list and "do the right thing"
// for new threads that show up while we stop and run async
// packets. Setting the packet to 'c' to continue all threads
// is the right thing to do 99.99% of the time because if a
// thread was single stepping, and we sent an interrupt, we
// will notice above that we didn't stop due to an interrupt
// but stopped due to stepping and we would _not_ continue.
// This packet may get modified by the async actions (e.g. to send a
// signal).
m_continue_packet = 'c';
cont_lock.unlock();
delegate.HandleStopReply();
if (should_stop)
return eStateStopped;
switch (cont_lock.lock()) {
case ContinueLock::LockResult::Success:
break;
case ContinueLock::LockResult::Failed:
return eStateInvalid;
case ContinueLock::LockResult::Cancelled:
return eStateStopped;
}
OnRunPacketSent(false);
break;
}
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet)
{
#ifdef _WIN32
// No unix sockets on windows
return false;
#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;
StreamString host_and_port;
if (hostname.empty())
hostname = "localhost";
host_and_port.Printf("%s:%u", hostname.c_str(), port);
const char *host_and_port_cstr = host_and_port.GetString().c_str();
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
if (log)
log->Printf("Launching debugserver with: %s...\n", host_and_port_cstr);
debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false);
error = StartDebugserverProcess (host_and_port_cstr,
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
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_qModuleInfo (StringExtractorGDBRemote &packet)
{
packet.SetFilePos(::strlen ("qModuleInfo:"));
std::string module_path;
packet.GetHexByteStringTerminatedBy(module_path, ';');
if (module_path.empty())
return SendErrorResponse (1);
if (packet.GetChar() != ';')
return SendErrorResponse (2);
std::string triple;
packet.GetHexByteString(triple);
ArchSpec arch(triple.c_str());
const FileSpec req_module_path_spec(module_path.c_str(), true);
const FileSpec module_path_spec = FindModuleFile(req_module_path_spec.GetPath(), arch);
const ModuleSpec module_spec(module_path_spec, arch);
ModuleSpecList module_specs;
if (!ObjectFile::GetModuleSpecifications(module_path_spec, 0, 0, module_specs))
return SendErrorResponse (3);
ModuleSpec matched_module_spec;
if (!module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec))
return SendErrorResponse (4);
const auto file_offset = matched_module_spec.GetObjectOffset();
const auto file_size = matched_module_spec.GetObjectSize();
const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");
StreamGDBRemote response;
if (uuid_str.empty())
{
std::string md5_hash;
if (!FileSystem::CalculateMD5AsString(matched_module_spec.GetFileSpec(), file_offset, file_size, md5_hash))
return SendErrorResponse (5);
response.PutCString ("md5:");
response.PutCStringAsRawHex8(md5_hash.c_str());
}
else{
response.PutCString ("uuid:");
response.PutCStringAsRawHex8(uuid_str.c_str());
}
response.PutChar(';');
const auto &module_arch = matched_module_spec.GetArchitecture();
response.PutCString("triple:");
response.PutCStringAsRawHex8( module_arch.GetTriple().getTriple().c_str());
response.PutChar(';');
response.PutCString("file_path:");
response.PutCStringAsRawHex8(module_path_spec.GetCString());
response.PutChar(';');
response.PutCString("file_offset:");
response.PutHex64(file_offset);
response.PutChar(';');
response.PutCString("file_size:");
response.PutHex64(file_size);
response.PutChar(';');
return SendPacketNoLock(response.GetData(), response.GetSize());
}