//===-- 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 <errno.h>
#include "lldb/Host/Config.h"
#include "GDBRemoteCommunicationServer.h"
#include "lldb/Core/StreamGDBRemote.h"
// C Includes
// C++ Includes
#include <cstring>
#include <chrono>
#include <thread>
// Other libraries and framework includes
#include "llvm/ADT/Triple.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/State.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/Debug.h"
#include "lldb/Host/Endian.h"
#include "lldb/Host/File.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/TimeValue.h"
#include "lldb/Target/FileAction.h"
#include "lldb/Target/Platform.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/NativeRegisterContext.h"
#include "Host/common/NativeProcessProtocol.h"
#include "Host/common/NativeThreadProtocol.h"
// Project includes
#include "Utility/StringExtractorGDBRemote.h"
#include "ProcessGDBRemote.h"
#include "ProcessGDBRemoteLog.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// GDBRemote Errors
//----------------------------------------------------------------------
namespace
{
enum GDBRemoteServerError
{
// Set to the first unused error number in literal form below
eErrorFirst = 29,
eErrorNoProcess = eErrorFirst,
eErrorResume,
eErrorExitStatus
};
}
//----------------------------------------------------------------------
// GDBRemoteCommunicationServer constructor
//----------------------------------------------------------------------
GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform) :
GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform),
m_platform_sp (Platform::GetHostPlatform ()),
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),
m_current_tid (LLDB_INVALID_THREAD_ID),
m_continue_tid (LLDB_INVALID_THREAD_ID),
m_debugged_process_mutex (Mutex::eMutexTypeRecursive),
m_debugged_process_sp (),
m_debugger_sp (),
m_stdio_communication ("process.stdio"),
m_exit_now (false),
m_inferior_prev_state (StateType::eStateInvalid),
m_thread_suffix_supported (false),
m_list_threads_in_stop_reply (false),
m_active_auxv_buffer_sp (),
m_saved_registers_mutex (),
m_saved_registers_map (),
m_next_saved_registers_id (1)
{
assert(is_platform && "must be lldb-platform if debugger is not specified");
}
GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform,
const lldb::PlatformSP& platform_sp,
lldb::DebuggerSP &debugger_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),
m_current_tid (LLDB_INVALID_THREAD_ID),
m_continue_tid (LLDB_INVALID_THREAD_ID),
m_debugged_process_mutex (Mutex::eMutexTypeRecursive),
m_debugged_process_sp (),
m_debugger_sp (debugger_sp),
m_stdio_communication ("process.stdio"),
m_exit_now (false),
m_inferior_prev_state (StateType::eStateInvalid),
m_thread_suffix_supported (false),
m_list_threads_in_stop_reply (false),
m_active_auxv_buffer_sp (),
m_saved_registers_mutex (),
m_saved_registers_map (),
m_next_saved_registers_id (1)
{
assert(platform_sp);
assert((is_platform || debugger_sp) && "must specify non-NULL debugger_sp when lldb-gdbserver");
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
GDBRemoteCommunicationServer::~GDBRemoteCommunicationServer()
{
}
GDBRemoteCommunication::PacketResult
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;
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);
quit = true;
break;
case StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess:
packet_result = Handle_qLaunchSuccess (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qGroupName:
packet_result = Handle_qGroupName (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qProcessInfo:
packet_result = Handle_qProcessInfo (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_QSetDetachOnError:
packet_result = Handle_QSetDetachOnError (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_C:
packet_result = Handle_C (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_c:
packet_result = Handle_c (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_vCont:
packet_result = Handle_vCont (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_vCont_actions:
packet_result = Handle_vCont_actions (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_stop_reason: // ?
packet_result = Handle_stop_reason (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;
case StringExtractorGDBRemote::eServerPacketType_qRegisterInfo:
packet_result = Handle_qRegisterInfo (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qfThreadInfo:
packet_result = Handle_qfThreadInfo (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qsThreadInfo:
packet_result = Handle_qsThreadInfo (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_p:
packet_result = Handle_p (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_P:
packet_result = Handle_P (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_H:
packet_result = Handle_H (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_m:
packet_result = Handle_m (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_M:
packet_result = Handle_M (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfoSupported:
packet_result = Handle_qMemoryRegionInfoSupported (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfo:
packet_result = Handle_qMemoryRegionInfo (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_interrupt:
if (IsGdbServer ())
packet_result = Handle_interrupt (packet);
else
{
error.SetErrorString("interrupt received");
interrupt = true;
}
break;
case StringExtractorGDBRemote::eServerPacketType_Z:
packet_result = Handle_Z (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_z:
packet_result = Handle_z (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_s:
packet_result = Handle_s (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qSupported:
packet_result = Handle_qSupported (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_QThreadSuffixSupported:
packet_result = Handle_QThreadSuffixSupported (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_QListThreadsInStopReply:
packet_result = Handle_QListThreadsInStopReply (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read:
packet_result = Handle_qXfer_auxv_read (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_QSaveRegisterState:
packet_result = Handle_QSaveRegisterState (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_QRestoreRegisterState:
packet_result = Handle_QRestoreRegisterState (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_vAttach:
packet_result = Handle_vAttach (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_D:
packet_result = Handle_D (packet);
break;
case StringExtractorGDBRemote::eServerPacketType_qThreadStopInfo:
packet_result = Handle_qThreadStopInfo (packet);
break;
}
}
else
{
if (!IsConnected())
{
error.SetErrorString("lost connection");
quit = true;
}
else
{
error.SetErrorString("timeout");
}
}
// Check if anything occurred that would force us to want to exit.
if (m_exit_now)
quit = true;
return packet_result;
}
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<const char**> (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 ()
{
// FIXME This looks an awful lot like we could override this in
// derived classes, one for lldb-platform, the other for lldb-gdbserver.
if (IsGdbServer ())
return LaunchProcessForDebugging ();
else
return LaunchPlatformProcess ();
}
bool
GDBRemoteCommunicationServer::ShouldRedirectInferiorOutputOverGdbRemote (const lldb_private::ProcessLaunchInfo &launch_info) const
{
// Retrieve the file actions specified for stdout and stderr.
auto stdout_file_action = launch_info.GetFileActionForFD (STDOUT_FILENO);
auto stderr_file_action = launch_info.GetFileActionForFD (STDERR_FILENO);
// If neither stdout and stderr file actions are specified, we're not doing anything special, so
// assume we want to redirect stdout/stderr over gdb-remote $O messages.
if ((stdout_file_action == nullptr) && (stderr_file_action == nullptr))
{
// Send stdout/stderr over the gdb-remote protocol.
return true;
}
// Any other setting for either stdout or stderr implies we are either suppressing
// it (with /dev/null) or we've got it set to a PTY. Either way, we don't want the
// output over gdb-remote.
return false;
}
lldb_private::Error
GDBRemoteCommunicationServer::LaunchProcessForDebugging ()
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (!m_process_launch_info.GetArguments ().GetArgumentCount ())
return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__);
lldb_private::Error error;
{
Mutex::Locker locker (m_debugged_process_mutex);
assert (!m_debugged_process_sp && "lldb-gdbserver creating debugged process but one already exists");
error = m_platform_sp->LaunchNativeProcess (
m_process_launch_info,
*this,
m_debugged_process_sp);
}
if (!error.Success ())
{
fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0));
return error;
}
// Handle mirroring of inferior stdout/stderr over the gdb-remote protocol as needed.
// llgs local-process debugging may specify PTYs, which will eliminate the need to reflect inferior
// stdout/stderr over the gdb-remote protocol.
if (ShouldRedirectInferiorOutputOverGdbRemote (m_process_launch_info))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " setting up stdout/stderr redirection via $O gdb-remote commands", __FUNCTION__, m_debugged_process_sp->GetID ());
// Setup stdout/stderr mapping from inferior to $O
auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor ();
if (terminal_fd >= 0)
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd);
error = SetSTDIOFileDescriptor (terminal_fd);
if (error.Fail ())
return error;
}
else
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd);
}
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " skipping stdout/stderr redirection via $O: inferior will communicate over client-provided file descriptors", __FUNCTION__, m_debugged_process_sp->GetID ());
}
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.
lldb::pid_t pid;
if ((pid = m_process_launch_info.GetProcessID ()) != LLDB_INVALID_PROCESS_ID)
{
// add to spawned pids
Mutex::Locker locker (m_spawned_pids_mutex);
// On an lldb-gdbserver, we would expect there to be only one.
assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed");
m_spawned_pids.insert (pid);
}
return error;
}
lldb_private::Error
GDBRemoteCommunicationServer::LaunchPlatformProcess ()
{
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 )
{
// add to spawned pids
{
Mutex::Locker locker (m_spawned_pids_mutex);
m_spawned_pids.insert(pid);
}
}
return error;
}
lldb_private::Error
GDBRemoteCommunicationServer::AttachToProcess (lldb::pid_t pid)
{
Error error;
if (!IsGdbServer ())
{
error.SetErrorString("cannot AttachToProcess () unless process is lldb-gdbserver");
return error;
}
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64, __FUNCTION__, pid);
// Scope for mutex locker.
{
// Before we try to attach, make sure we aren't already monitoring something else.
Mutex::Locker locker (m_spawned_pids_mutex);
if (!m_spawned_pids.empty ())
{
error.SetErrorStringWithFormat ("cannot attach to a process %" PRIu64 " when another process with pid %" PRIu64 " is being debugged.", pid, *m_spawned_pids.begin());
return error;
}
// Try to attach.
error = m_platform_sp->AttachNativeProcess (pid, *this, m_debugged_process_sp);
if (!error.Success ())
{
fprintf (stderr, "%s: failed to attach to process %" PRIu64 ": %s", __FUNCTION__, pid, error.AsCString ());
return error;
}
// Setup stdout/stderr mapping from inferior.
auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor ();
if (terminal_fd >= 0)
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd);
error = SetSTDIOFileDescriptor (terminal_fd);
if (error.Fail ())
return error;
}
else
{
if (log)
log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd);
}
printf ("Attached to process %" PRIu64 "...\n", pid);
// Add to list of spawned processes.
assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed");
m_spawned_pids.insert (pid);
return error;
}
}
void
GDBRemoteCommunicationServer::InitializeDelegate (lldb_private::NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", current state: %s",
__FUNCTION__,
process->GetID (),
StateAsCString (process->GetState ()));
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::SendWResponse (lldb_private::NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// send W notification
ExitType exit_type = ExitType::eExitTypeInvalid;
int return_code = 0;
std::string exit_description;
const bool got_exit_info = process->GetExitStatus (&exit_type, &return_code, exit_description);
if (!got_exit_info)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", failed to retrieve process exit status", __FUNCTION__, process->GetID ());
StreamGDBRemote response;
response.PutChar ('E');
response.PutHex8 (GDBRemoteServerError::eErrorExitStatus);
return SendPacketNoLock(response.GetData(), response.GetSize());
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", returning exit type %d, return code %d [%s]", __FUNCTION__, process->GetID (), exit_type, return_code, exit_description.c_str ());
StreamGDBRemote response;
char return_type_code;
switch (exit_type)
{
case ExitType::eExitTypeExit:
return_type_code = 'W';
break;
case ExitType::eExitTypeSignal:
return_type_code = 'X';
break;
case ExitType::eExitTypeStop:
return_type_code = 'S';
break;
case ExitType::eExitTypeInvalid:
return_type_code = 'E';
break;
}
response.PutChar (return_type_code);
// POSIX exit status limited to unsigned 8 bits.
response.PutHex8 (return_code);
return SendPacketNoLock(response.GetData(), response.GetSize());
}
}
static void
AppendHexValue (StreamString &response, const uint8_t* buf, uint32_t buf_size, bool swap)
{
int64_t i;
if (swap)
{
for (i = buf_size-1; i >= 0; i--)
response.PutHex8 (buf[i]);
}
else
{
for (i = 0; i < buf_size; i++)
response.PutHex8 (buf[i]);
}
}
static void
WriteRegisterValueInHexFixedWidth (StreamString &response,
NativeRegisterContextSP ®_ctx_sp,
const RegisterInfo ®_info,
const RegisterValue *reg_value_p)
{
RegisterValue reg_value;
if (!reg_value_p)
{
Error error = reg_ctx_sp->ReadRegister (®_info, reg_value);
if (error.Success ())
reg_value_p = ®_value;
// else log.
}
if (reg_value_p)
{
AppendHexValue (response, (const uint8_t*) reg_value_p->GetBytes (), reg_value_p->GetByteSize (), false);
}
else
{
// Zero-out any unreadable values.
if (reg_info.byte_size > 0)
{
std::basic_string<uint8_t> zeros(reg_info.byte_size, '\0');
AppendHexValue (response, zeros.data(), zeros.size(), false);
}
}
}
// WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value);
static void
WriteGdbRegnumWithFixedWidthHexRegisterValue (StreamString &response,
NativeRegisterContextSP ®_ctx_sp,
const RegisterInfo ®_info,
const RegisterValue ®_value)
{
// Output the register number as 'NN:VVVVVVVV;' where NN is a 2 bytes HEX
// gdb register number, and VVVVVVVV is the correct number of hex bytes
// as ASCII for the register value.
if (reg_info.kinds[eRegisterKindGDB] == LLDB_INVALID_REGNUM)
return;
response.Printf ("%.02x:", reg_info.kinds[eRegisterKindGDB]);
WriteRegisterValueInHexFixedWidth (response, reg_ctx_sp, reg_info, ®_value);
response.PutChar (';');
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::SendStopReplyPacketForThread (lldb::tid_t tid)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
// Ensure we're llgs.
if (!IsGdbServer ())
{
// Only supported on llgs
return SendUnimplementedResponse ("");
}
// Ensure we have a debugged process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (50);
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s preparing packet for pid %" PRIu64 " tid %" PRIu64,
__FUNCTION__, m_debugged_process_sp->GetID (), tid);
// Ensure we can get info on the given thread.
NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid));
if (!thread_sp)
return SendErrorResponse (51);
// Grab the reason this thread stopped.
struct ThreadStopInfo tid_stop_info;
if (!thread_sp->GetStopReason (tid_stop_info))
return SendErrorResponse (52);
const bool did_exec = tid_stop_info.reason == eStopReasonExec;
// FIXME implement register handling for exec'd inferiors.
// if (did_exec)
// {
// const bool force = true;
// InitializeRegisters(force);
// }
StreamString response;
// Output the T packet with the thread
response.PutChar ('T');
int signum = tid_stop_info.details.signal.signo;
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64,
__FUNCTION__,
m_debugged_process_sp->GetID (),
tid,
signum,
tid_stop_info.reason,
tid_stop_info.details.exception.type);
}
switch (tid_stop_info.reason)
{
case eStopReasonSignal:
case eStopReasonException:
signum = thread_sp->TranslateStopInfoToGdbSignal (tid_stop_info);
break;
default:
signum = 0;
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " has stop reason %d, using signo = 0 in stop reply response",
__FUNCTION__,
m_debugged_process_sp->GetID (),
tid,
tid_stop_info.reason);
}
break;
}
// Print the signal number.
response.PutHex8 (signum & 0xff);
// Include the tid.
response.Printf ("thread:%" PRIx64 ";", tid);
// Include the thread name if there is one.
const std::string thread_name = thread_sp->GetName ();
if (!thread_name.empty ())
{
size_t thread_name_len = thread_name.length ();
if (::strcspn (thread_name.c_str (), "$#+-;:") == thread_name_len)
{
response.PutCString ("name:");
response.PutCString (thread_name.c_str ());
}
else
{
// The thread name contains special chars, send as hex bytes.
response.PutCString ("hexname:");
response.PutCStringAsRawHex8 (thread_name.c_str ());
}
response.PutChar (';');
}
// FIXME look for analog
// thread_identifier_info_data_t thread_ident_info;
// if (DNBThreadGetIdentifierInfo (pid, tid, &thread_ident_info))
// {
// if (thread_ident_info.dispatch_qaddr != 0)
// ostrm << std::hex << "qaddr:" << thread_ident_info.dispatch_qaddr << ';';
// }
// If a 'QListThreadsInStopReply' was sent to enable this feature, we
// will send all thread IDs back in the "threads" key whose value is
// a list of hex thread IDs separated by commas:
// "threads:10a,10b,10c;"
// This will save the debugger from having to send a pair of qfThreadInfo
// and qsThreadInfo packets, but it also might take a lot of room in the
// stop reply packet, so it must be enabled only on systems where there
// are no limits on packet lengths.
if (m_list_threads_in_stop_reply)
{
response.PutCString ("threads:");
uint32_t thread_index = 0;
NativeThreadProtocolSP listed_thread_sp;
for (listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); listed_thread_sp; ++thread_index, listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index))
{
if (thread_index > 0)
response.PutChar (',');
response.Printf ("%" PRIx64, listed_thread_sp->GetID ());
}
response.PutChar (';');
}
//
// Expedite registers.
//
// Grab the register context.
NativeRegisterContextSP reg_ctx_sp = thread_sp->GetRegisterContext ();
if (reg_ctx_sp)
{
// Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers.
const RegisterSet *reg_set_p;
if (reg_ctx_sp->GetRegisterSetCount () > 0 && ((reg_set_p = reg_ctx_sp->GetRegisterSet (0)) != nullptr))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s expediting registers from set '%s' (registers set count: %zu)", __FUNCTION__, reg_set_p->name ? reg_set_p->name : "<unnamed-set>", reg_set_p->num_registers);
for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p)
{
const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex (*reg_num_p);
if (reg_info_p == nullptr)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to get register info for register set '%s', register index %" PRIu32, __FUNCTION__, reg_set_p->name ? reg_set_p->name : "<unnamed-set>", *reg_num_p);
}
else if (reg_info_p->value_regs == nullptr)
{
// Only expediate registers that are not contained in other registers.
RegisterValue reg_value;
Error error = reg_ctx_sp->ReadRegister (reg_info_p, reg_value);
if (error.Success ())
WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value);
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to read register '%s' index %" PRIu32 ": %s", __FUNCTION__, reg_info_p->name ? reg_info_p->name : "<unnamed-register>", *reg_num_p, error.AsCString ());
}
}
}
}
}
if (did_exec)
{
response.PutCString ("reason:exec;");
}
else if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type)
{
response.PutCString ("metype:");
response.PutHex64 (tid_stop_info.details.exception.type);
response.PutCString (";mecount:");
response.PutHex32 (tid_stop_info.details.exception.data_count);
response.PutChar (';');
for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i)
{
response.PutCString ("medata:");
response.PutHex64 (tid_stop_info.details.exception.data[i]);
response.PutChar (';');
}
}
return SendPacketNoLock (response.GetData(), response.GetSize());
}
void
GDBRemoteCommunicationServer::HandleInferiorState_Exited (lldb_private::NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__);
// Send the exit result, and don't flush output.
// Note: flushing output here would join the inferior stdio reflection thread, which
// would gunk up the waitpid monitor thread that is calling this.
PacketResult result = SendStopReasonForState (StateType::eStateExited, false);
if (result != PacketResult::Success)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ());
}
// Remove the process from the list of spawned pids.
{
Mutex::Locker locker (m_spawned_pids_mutex);
if (m_spawned_pids.erase (process->GetID ()) < 1)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to remove PID %" PRIu64 " from the spawned pids list", __FUNCTION__, process->GetID ());
}
}
// FIXME can't do this yet - since process state propagation is currently
// synchronous, it is running off the NativeProcessProtocol's innards and
// will tear down the NPP while it still has code to execute.
#if 0
// Clear the NativeProcessProtocol pointer.
{
Mutex::Locker locker (m_debugged_process_mutex);
m_debugged_process_sp.reset();
}
#endif
// Close the pipe to the inferior terminal i/o if we launched it
// and set one up. Otherwise, 'k' and its flush of stdio could
// end up waiting on a thread join that will never end. Consider
// adding a timeout to the connection thread join call so we
// can avoid that scenario altogether.
MaybeCloseInferiorTerminalConnection ();
// We are ready to exit the debug monitor.
m_exit_now = true;
}
void
GDBRemoteCommunicationServer::HandleInferiorState_Stopped (lldb_private::NativeProcessProtocol *process)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__);
// Send the stop reason unless this is the stop after the
// launch or attach.
switch (m_inferior_prev_state)
{
case eStateLaunching:
case eStateAttaching:
// Don't send anything per debugserver behavior.
break;
default:
// In all other cases, send the stop reason.
PacketResult result = SendStopReasonForState (StateType::eStateStopped, false);
if (result != PacketResult::Success)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ());
}
break;
}
}
void
GDBRemoteCommunicationServer::ProcessStateChanged (lldb_private::NativeProcessProtocol *process, lldb::StateType state)
{
assert (process && "process cannot be NULL");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", state: %s",
__FUNCTION__,
process->GetID (),
StateAsCString (state));
}
switch (state)
{
case StateType::eStateExited:
HandleInferiorState_Exited (process);
break;
case StateType::eStateStopped:
HandleInferiorState_Stopped (process);
break;
default:
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s didn't handle state change for pid %" PRIu64 ", new state: %s",
__FUNCTION__,
process->GetID (),
StateAsCString (state));
}
break;
}
// Remember the previous state reported to us.
m_inferior_prev_state = state;
}
void
GDBRemoteCommunicationServer::DidExec (NativeProcessProtocol *process)
{
ClearProcessSpecificData ();
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::SendONotification (const char *buffer, uint32_t len)
{
if ((buffer == nullptr) || (len == 0))
{
// Nothing to send.
return PacketResult::Success;
}
StreamString response;
response.PutChar ('O');
response.PutBytesAsRawHex8 (buffer, len);
return SendPacketNoLock (response.GetData (), response.GetSize ());
}
lldb_private::Error
GDBRemoteCommunicationServer::SetSTDIOFileDescriptor (int fd)
{
Error error;
// Set up the Read Thread for reading/handling process I/O
std::unique_ptr<ConnectionFileDescriptor> conn_up (new ConnectionFileDescriptor (fd, true));
if (!conn_up)
{
error.SetErrorString ("failed to create ConnectionFileDescriptor");
return error;
}
m_stdio_communication.SetConnection (conn_up.release());
if (!m_stdio_communication.IsConnected ())
{
error.SetErrorString ("failed to set connection for inferior I/O communication");
return error;
}
m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this);
m_stdio_communication.StartReadThread();
return error;
}
void
GDBRemoteCommunicationServer::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len)
{
GDBRemoteCommunicationServer *server = reinterpret_cast<GDBRemoteCommunicationServer*> (baton);
static_cast<void> (server->SendONotification (static_cast<const char *>(src), src_len));
}
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::SendIllFormedResponse (const StringExtractorGDBRemote &failed_packet, const char *message)
{
Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PACKETS));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)", __FUNCTION__, failed_packet.GetStringRef ().c_str (), message ? message : "");
return SendErrorResponse (0x03);
}
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(HostInfo::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(";");
}
// Only send out MachO info when lldb-platform/llgs is running on a MachO host.
#if defined(__APPLE__)
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;");
#else
response.Printf("watchpoint_exceptions_received:after;");
#endif
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 (HostInfo::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 (HostInfo::GetOSBuildString(s))
{
response.PutCString ("os_build:");
response.PutCStringAsRawHex8(s.c_str());
response.PutChar(';');
}
if (HostInfo::GetOSKernelDescription(s))
{
response.PutCString ("os_kernel:");
response.PutCStringAsRawHex8(s.c_str());
response.PutChar(';');
}
#if defined(__APPLE__)
#if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
// 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("127.0.0.1");
response.PutChar(';');
#else // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
if (HostInfo::GetHostname(s))
{
response.PutCString ("hostname:");
response.PutCStringAsRawHex8(s.c_str());
response.PutChar(';');
}
#endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
#else // #if defined(__APPLE__)
if (HostInfo::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(';');
}
}
static void
CreateProcessInfoResponse_DebugServerStyle (const ProcessInstanceInfo &proc_info, StreamString &response)
{
response.Printf ("pid:%" PRIx64 ";parent-pid:%" PRIx64 ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;",
proc_info.GetProcessID(),
proc_info.GetParentProcessID(),
proc_info.GetUserID(),
proc_info.GetGroupID(),
proc_info.GetEffectiveUserID(),
proc_info.GetEffectiveGroupID());
const ArchSpec &proc_arch = proc_info.GetArchitecture();
if (proc_arch.IsValid())
{
const llvm::Triple &proc_triple = proc_arch.GetTriple();
#if defined(__APPLE__)
// We'll send cputype/cpusubtype.
const uint32_t cpu_type = proc_arch.GetMachOCPUType();
if (cpu_type != 0)
response.Printf ("cputype:%" PRIx32 ";", cpu_type);
const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType();
if (cpu_subtype != 0)
response.Printf ("cpusubtype:%" PRIx32 ";", cpu_subtype);
const std::string vendor = proc_triple.getVendorName ();
if (!vendor.empty ())
response.Printf ("vendor:%s;", vendor.c_str ());
#else
// We'll send the triple.
response.PutCString("triple:");
response.PutCStringAsRawHex8(proc_triple.getTriple().c_str());
response.PutChar(';');
#endif
std::string ostype = proc_triple.getOSName ();
// Adjust so ostype reports ios for Apple/ARM and Apple/ARM64.
if (proc_triple.getVendor () == llvm::Triple::Apple)
{
switch (proc_triple.getArch ())
{
case llvm::Triple::arm:
case llvm::Triple::aarch64:
ostype = "ios";
break;
default:
// No change.
break;
}
}
response.Printf ("ostype:%s;", ostype.c_str ());
switch (proc_arch.GetByteOrder ())
{
case lldb::eByteOrderLittle: response.PutCString ("endian:little;"); break;
case lldb::eByteOrderBig: response.PutCString ("endian:big;"); break;
case lldb::eByteOrderPDP: response.PutCString ("endian:pdp;"); break;
default:
// Nothing.
break;
}
if (proc_triple.isArch64Bit ())
response.PutCString ("ptrsize:8;");
else if (proc_triple.isArch32Bit ())
response.PutCString ("ptrsize:4;");
else if (proc_triple.isArch16Bit ())
response.PutCString ("ptrsize:2;");
}
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qProcessInfo (StringExtractorGDBRemote &packet)
{
// Only the gdb server handles this.
if (!IsGdbServer ())
return SendUnimplementedResponse (packet.GetStringRef ().c_str ());
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (68);
ProcessInstanceInfo proc_info;
if (Host::GetProcessInfo (m_debugged_process_sp->GetID (), proc_info))
{
StreamString response;
CreateProcessInfoResponse_DebugServerStyle(proc_info, response);
return SendPacketNoLock (response.GetData (), response.GetSize ());
}
return SendErrorResponse (1);
}
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)
{
#if !defined(LLDB_DISABLE_POSIX)
// 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 (HostInfo::LookupUserName(uid, name))
{
StreamString response;
response.PutCStringAsRawHex8 (name.c_str());
return SendPacketNoLock (response.GetData(), response.GetSize());
}
}
#endif
return SendErrorResponse (5);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet)
{
#if !defined(LLDB_DISABLE_POSIX)
// 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 (HostInfo::LookupGroupName(gid, name))
{
StreamString response;
response.PutCStringAsRawHex8 (name.c_str());
return SendPacketNoLock (response.GetData(), response.GetSize());
}
}
#endif
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 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<num_retries; i++)
// {
// struct proc_bsdinfo bsd_info;
// int error = ::proc_pidinfo (pid, PROC_PIDTBSDINFO,
// (uint64_t) 0,
// &bsd_info,
// PROC_PIDTBSDINFO_SIZE);
//
// switch (error)
// {
// case EINVAL:
// case ENOTSUP:
// case ESRCH:
// case EPERM:
// return false;
//
// default:
// break;
//
// case 0:
// if (bsd_info.pbi_status == SSTOP)
// return true;
// }
// ::usleep (time_delta_usecs);
// }
// return false;
//}
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...
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.c_str());
if (log)
log->Printf ("GDBRemoteCommunicationServer::%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("GDBRemoteCommunicationServer::%s failed to launch exe: %s",
__FUNCTION__,
m_process_launch_error.AsCString());
}
}
return SendErrorResponse (8);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet)
{
StreamString response;
if (IsGdbServer ())
{
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (68);
// Make sure we set the current thread so g and p packets return
// the data the gdb will expect.
lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID ();
SetCurrentThreadID (tid);
NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetCurrentThread ();
if (!thread_sp)
return SendErrorResponse (69);
response.Printf ("QC%" PRIx64, thread_sp->GetID ());
}
else
{
// NOTE: lldb should now be using qProcessInfo for process IDs. This path here
// should not be used. It is reporting process id instead of thread id. The
// correct answer doesn't seem to make much sense for lldb-platform.
// CONSIDER: flip to "unsupported".
lldb::pid_t pid = m_process_launch_info.GetProcessID();
response.Printf("QC%" PRIx64, pid);
// this should always be platform here
assert (m_is_platform && "this code path should only be traversed for lldb-platform");
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
Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM));
// Spawn a local debugserver as a platform so we can then attach or launch
// a process...
if (m_is_platform)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%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 = 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).
// 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);
debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false);
Error 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())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%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 ("GDBRemoteCommunicationServer::%s() debugserver launch failed: %s", __FUNCTION__, error.AsCString ());
}
}
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 killing 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<lldb::pid_t> 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);
}
}
FlushInferiorOutput ();
// No OK response for kill packet.
// return SendOKResponse ();
return PacketResult::Success;
}
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("<unknown error>"));
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:"));
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:"));
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:"));
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_C (StringExtractorGDBRemote &packet)
{
if (!IsGdbServer ())
return SendUnimplementedResponse (packet.GetStringRef().c_str());
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__);
// Ensure we have a native process.
if (!m_debugged_process_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__);
return SendErrorResponse (0x36);
}
// Pull out the signal number.
packet.SetFilePos (::strlen ("C"));
if (packet.GetBytesLeft () < 1)
{
// Shouldn't be using a C without a signal.
return SendIllFormedResponse (packet, "C packet specified without signal.");
}
const uint32_t signo = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (signo == std::numeric_limits<uint32_t>::max ())
return SendIllFormedResponse (packet, "failed to parse signal number");
// Handle optional continue address.
if (packet.GetBytesLeft () > 0)
{
// FIXME add continue at address support for $C{signo}[;{continue-address}].
if (*packet.Peek () == ';')
return SendUnimplementedResponse (packet.GetStringRef().c_str());
else
return SendIllFormedResponse (packet, "unexpected content after $C{signal-number}");
}
lldb_private::ResumeActionList resume_actions (StateType::eStateRunning, 0);
Error error;
// We have two branches: what to do if a continue thread is specified (in which case we target
// sending the signal to that thread), or when we don't have a continue thread set (in which
// case we send a signal to the process).
// TODO discuss with Greg Clayton, make sure this makes sense.
lldb::tid_t signal_tid = GetContinueThreadID ();
if (signal_tid != LLDB_INVALID_THREAD_ID)
{
// The resume action for the continue thread (or all threads if a continue thread is not set).
lldb_private::ResumeAction action = { GetContinueThreadID (), StateType::eStateRunning, static_cast<int> (signo) };
// Add the action for the continue thread (or all threads when the continue thread isn't present).
resume_actions.Append (action);
}
else
{
// Send the signal to the process since we weren't targeting a specific continue thread with the signal.
error = m_debugged_process_sp->Signal (signo);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to send signal for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x52);
}
}
// Resume the threads.
error = m_debugged_process_sp->Resume (resume_actions);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to resume threads for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
return SendErrorResponse (0x38);
}
// Don't send an "OK" packet; response is the stopped/exited message.
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_c (StringExtractorGDBRemote &packet, bool skip_file_pos_adjustment)
{
if (!IsGdbServer ())
return SendUnimplementedResponse (packet.GetStringRef().c_str());
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__);
// We reuse this method in vCont - don't double adjust the file position.
if (!skip_file_pos_adjustment)
packet.SetFilePos (::strlen ("c"));
// For now just support all continue.
const bool has_continue_address = (packet.GetBytesLeft () > 0);
if (has_continue_address)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s not implemented for c{address} variant [%s remains]", __FUNCTION__, packet.Peek ());
return SendUnimplementedResponse (packet.GetStringRef().c_str());
}
// Ensure we have a native process.
if (!m_debugged_process_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__);
return SendErrorResponse (0x36);
}
// Build the ResumeActionList
lldb_private::ResumeActionList actions (StateType::eStateRunning, 0);
Error error = m_debugged_process_sp->Resume (actions);
if (error.Fail ())
{
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s c failed for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
}
return SendErrorResponse (GDBRemoteServerError::eErrorResume);
}
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ());
// No response required from continue.
return PacketResult::Success;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_vCont_actions (StringExtractorGDBRemote &packet)
{
if (!IsGdbServer ())
{
// only llgs supports $vCont.
return SendUnimplementedResponse (packet.GetStringRef().c_str());
}
StreamString response;
response.Printf("vCont;c;C;s;S");
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_vCont (StringExtractorGDBRemote &packet)
{
if (!IsGdbServer ())
{
// only llgs supports $vCont
return SendUnimplementedResponse (packet.GetStringRef().c_str());
}
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s handling vCont packet", __FUNCTION__);
packet.SetFilePos (::strlen ("vCont"));
// Check if this is all continue (no options or ";c").
if (!packet.GetBytesLeft () || (::strcmp (packet.Peek (), ";c") == 0))
{
// Move the packet past the ";c".
if (packet.GetBytesLeft ())
packet.SetFilePos (packet.GetFilePos () + ::strlen (";c"));
const bool skip_file_pos_adjustment = true;
return Handle_c (packet, skip_file_pos_adjustment);
}
else if (::strcmp (packet.Peek (), ";s") == 0)
{
// Move past the ';', then do a simple 's'.
packet.SetFilePos (packet.GetFilePos () + 1);
return Handle_s (packet);
}
// Ensure we have a native process.
if (!m_debugged_process_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__);
return SendErrorResponse (0x36);
}
ResumeActionList thread_actions;
while (packet.GetBytesLeft () && *packet.Peek () == ';')
{
// Skip the semi-colon.
packet.GetChar ();
// Build up the thread action.
ResumeAction thread_action;
thread_action.tid = LLDB_INVALID_THREAD_ID;
thread_action.state = eStateInvalid;
thread_action.signal = 0;
const char action = packet.GetChar ();
switch (action)
{
case 'C':
thread_action.signal = packet.GetHexMaxU32 (false, 0);
if (thread_action.signal == 0)
return SendIllFormedResponse (packet, "Could not parse signal in vCont packet C action");
// Fall through to next case...
case 'c':
// Continue
thread_action.state = eStateRunning;
break;
case 'S':
thread_action.signal = packet.GetHexMaxU32 (false, 0);
if (thread_action.signal == 0)
return SendIllFormedResponse (packet, "Could not parse signal in vCont packet S action");
// Fall through to next case...
case 's':
// Step
thread_action.state = eStateStepping;
break;
default:
return SendIllFormedResponse (packet, "Unsupported vCont action");
break;
}
// Parse out optional :{thread-id} value.
if (packet.GetBytesLeft () && (*packet.Peek () == ':'))
{
// Consume the separator.
packet.GetChar ();
thread_action.tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID);
if (thread_action.tid == LLDB_INVALID_THREAD_ID)
return SendIllFormedResponse (packet, "Could not parse thread number in vCont packet");
}
thread_actions.Append (thread_action);
}
// If a default action for all other threads wasn't mentioned
// then we should stop the threads.
thread_actions.SetDefaultThreadActionIfNeeded (eStateStopped, 0);
Error error = m_debugged_process_sp->Resume (thread_actions);
if (error.Fail ())
{
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s vCont failed for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
}
return SendErrorResponse (GDBRemoteServerError::eErrorResume);
}
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ());
// No response required from vCont.
return PacketResult::Success;
}
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 = FileSystem::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 = FileSystem::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 = FileSystem::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 = FileSystem::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 = FileSystem::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 = FileSystem::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);
}
void
GDBRemoteCommunicationServer::SetCurrentThreadID (lldb::tid_t tid)
{
assert (IsGdbServer () && "SetCurrentThreadID() called when not GdbServer code");
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s setting current thread id to %" PRIu64, __FUNCTION__, tid);
m_current_tid = tid;
if (m_debugged_process_sp)
m_debugged_process_sp->SetCurrentThreadID (m_current_tid);
}
void
GDBRemoteCommunicationServer::SetContinueThreadID (lldb::tid_t tid)
{
assert (IsGdbServer () && "SetContinueThreadID() called when not GdbServer code");
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s setting continue thread id to %" PRIu64, __FUNCTION__, tid);
m_continue_tid = tid;
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_stop_reason (StringExtractorGDBRemote &packet)
{
// Handle the $? gdbremote command.
if (!IsGdbServer ())
return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_stop_reason() unimplemented");
// If no process, indicate error
if (!m_debugged_process_sp)
return SendErrorResponse (02);
return SendStopReasonForState (m_debugged_process_sp->GetState (), true);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::SendStopReasonForState (lldb::StateType process_state, bool flush_on_exit)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
switch (process_state)
{
case eStateAttaching:
case eStateLaunching:
case eStateRunning:
case eStateStepping:
case eStateDetached:
// NOTE: gdb protocol doc looks like it should return $OK
// when everything is running (i.e. no stopped result).
return PacketResult::Success; // Ignore
case eStateSuspended:
case eStateStopped:
case eStateCrashed:
{
lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID ();
// Make sure we set the current thread so g and p packets return
// the data the gdb will expect.
SetCurrentThreadID (tid);
return SendStopReplyPacketForThread (tid);
}
case eStateInvalid:
case eStateUnloaded:
case eStateExited:
if (flush_on_exit)
FlushInferiorOutput ();
return SendWResponse(m_debugged_process_sp.get());
default:
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", current state reporting not handled: %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
StateAsCString (process_state));
}
break;
}
return SendErrorResponse (0);
}
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 (FileSystem::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);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qRegisterInfo (StringExtractorGDBRemote &packet)
{
// Ensure we're llgs.
if (!IsGdbServer())
return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qRegisterInfo() unimplemented");
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
return SendErrorResponse (68);
// Ensure we have a thread.
NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadAtIndex (0));
if (!thread_sp)
return SendErrorResponse (69);
// Get the register context for the first thread.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
return SendErrorResponse (69);
// Parse out the register number from the request.
packet.SetFilePos (strlen("qRegisterInfo"));
const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (reg_index == std::numeric_limits<uint32_t>::max ())
return SendErrorResponse (69);
// Return the end of registers response if we've iterated one past the end of the register set.
if (reg_index >= reg_context_sp->GetRegisterCount ())
return SendErrorResponse (69);
const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index);
if (!reg_info)
return SendErrorResponse (69);
// Build the reginfos response.
StreamGDBRemote response;
response.PutCString ("name:");
response.PutCString (reg_info->name);
response.PutChar (';');
if (reg_info->alt_name && reg_info->alt_name[0])
{
response.PutCString ("alt-name:");
response.PutCString (reg_info->alt_name);
response.PutChar (';');
}
response.Printf ("bitsize:%" PRIu32 ";offset:%" PRIu32 ";", reg_info->byte_size * 8, reg_info->byte_offset);
switch (reg_info->encoding)
{
case eEncodingUint: response.PutCString ("encoding:uint;"); break;
case eEncodingSint: response.PutCString ("encoding:sint;"); break;
case eEncodingIEEE754: response.PutCString ("encoding:ieee754;"); break;
case eEncodingVector: response.PutCString ("encoding:vector;"); break;
default: break;
}
switch (reg_info->format)
{
case eFormatBinary: response.PutCString ("format:binary;"); break;
case eFormatDecimal: response.PutCString ("format:decimal;"); break;
case eFormatHex: response.PutCString ("format:hex;"); break;
case eFormatFloat: response.PutCString ("format:float;"); break;
case eFormatVectorOfSInt8: response.PutCString ("format:vector-sint8;"); break;
case eFormatVectorOfUInt8: response.PutCString ("format:vector-uint8;"); break;
case eFormatVectorOfSInt16: response.PutCString ("format:vector-sint16;"); break;
case eFormatVectorOfUInt16: response.PutCString ("format:vector-uint16;"); break;
case eFormatVectorOfSInt32: response.PutCString ("format:vector-sint32;"); break;
case eFormatVectorOfUInt32: response.PutCString ("format:vector-uint32;"); break;
case eFormatVectorOfFloat32: response.PutCString ("format:vector-float32;"); break;
case eFormatVectorOfUInt128: response.PutCString ("format:vector-uint128;"); break;
default: break;
};
const char *const register_set_name = reg_context_sp->GetRegisterSetNameForRegisterAtIndex(reg_index);
if (register_set_name)
{
response.PutCString ("set:");
response.PutCString (register_set_name);
response.PutChar (';');
}
if (reg_info->kinds[RegisterKind::eRegisterKindGCC] != LLDB_INVALID_REGNUM)
response.Printf ("gcc:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindGCC]);
if (reg_info->kinds[RegisterKind::eRegisterKindDWARF] != LLDB_INVALID_REGNUM)
response.Printf ("dwarf:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindDWARF]);
switch (reg_info->kinds[RegisterKind::eRegisterKindGeneric])
{
case LLDB_REGNUM_GENERIC_PC: response.PutCString("generic:pc;"); break;
case LLDB_REGNUM_GENERIC_SP: response.PutCString("generic:sp;"); break;
case LLDB_REGNUM_GENERIC_FP: response.PutCString("generic:fp;"); break;
case LLDB_REGNUM_GENERIC_RA: response.PutCString("generic:ra;"); break;
case LLDB_REGNUM_GENERIC_FLAGS: response.PutCString("generic:flags;"); break;
case LLDB_REGNUM_GENERIC_ARG1: response.PutCString("generic:arg1;"); break;
case LLDB_REGNUM_GENERIC_ARG2: response.PutCString("generic:arg2;"); break;
case LLDB_REGNUM_GENERIC_ARG3: response.PutCString("generic:arg3;"); break;
case LLDB_REGNUM_GENERIC_ARG4: response.PutCString("generic:arg4;"); break;
case LLDB_REGNUM_GENERIC_ARG5: response.PutCString("generic:arg5;"); break;
case LLDB_REGNUM_GENERIC_ARG6: response.PutCString("generic:arg6;"); break;
case LLDB_REGNUM_GENERIC_ARG7: response.PutCString("generic:arg7;"); break;
case LLDB_REGNUM_GENERIC_ARG8: response.PutCString("generic:arg8;"); break;
default: break;
}
if (reg_info->value_regs && reg_info->value_regs[0] != LLDB_INVALID_REGNUM)
{
response.PutCString ("container-regs:");
int i = 0;
for (const uint32_t *reg_num = reg_info->value_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i)
{
if (i > 0)
response.PutChar (',');
response.Printf ("%" PRIx32, *reg_num);
}
response.PutChar (';');
}
if (reg_info->invalidate_regs && reg_info->invalidate_regs[0])
{
response.PutCString ("invalidate-regs:");
int i = 0;
for (const uint32_t *reg_num = reg_info->invalidate_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i)
{
if (i > 0)
response.PutChar (',');
response.Printf ("%" PRIx32, *reg_num);
}
response.PutChar (';');
}
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qfThreadInfo (StringExtractorGDBRemote &packet)
{
// Ensure we're llgs.
if (!IsGdbServer())
return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qfThreadInfo() unimplemented");
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s() no process (%s), returning OK", __FUNCTION__, m_debugged_process_sp ? "invalid process id" : "null m_debugged_process_sp");
return SendOKResponse ();
}
StreamGDBRemote response;
response.PutChar ('m');
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s() starting thread iteration", __FUNCTION__);
NativeThreadProtocolSP thread_sp;
uint32_t thread_index;
for (thread_index = 0, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index);
thread_sp;
++thread_index, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s() iterated thread %" PRIu32 "(%s, tid=0x%" PRIx64 ")", __FUNCTION__, thread_index, thread_sp ? "is not null" : "null", thread_sp ? thread_sp->GetID () : LLDB_INVALID_THREAD_ID);
if (thread_index > 0)
response.PutChar(',');
response.Printf ("%" PRIx64, thread_sp->GetID ());
}
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s() finished thread iteration", __FUNCTION__);
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qsThreadInfo (StringExtractorGDBRemote &packet)
{
// Ensure we're llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_qsThreadInfo() unimplemented");
// FIXME for now we return the full thread list in the initial packet and always do nothing here.
return SendPacketNoLock ("l", 1);
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_p (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Ensure we're llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_p() unimplemented");
// Parse out the register number from the request.
packet.SetFilePos (strlen("p"));
const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (reg_index == std::numeric_limits<uint32_t>::max ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ());
return SendErrorResponse (0x15);
}
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Get the thread's register context.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
// Return the end of registers response if we've iterated one past the end of the register set.
if (reg_index >= reg_context_sp->GetRegisterCount ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetRegisterCount ());
return SendErrorResponse (0x15);
}
const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index);
if (!reg_info)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index);
return SendErrorResponse (0x15);
}
// Build the reginfos response.
StreamGDBRemote response;
// Retrieve the value
RegisterValue reg_value;
Error error = reg_context_sp->ReadRegister (reg_info, reg_value);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, read of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ());
return SendErrorResponse (0x15);
}
const uint8_t *const data = reinterpret_cast<const uint8_t*> (reg_value.GetBytes ());
if (!data)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to get data bytes from requested register %" PRIu32, __FUNCTION__, reg_index);
return SendErrorResponse (0x15);
}
// FIXME flip as needed to get data in big/little endian format for this host.
for (uint32_t i = 0; i < reg_value.GetByteSize (); ++i)
response.PutHex8 (data[i]);
return SendPacketNoLock (response.GetData (), response.GetSize ());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_P (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Ensure we're llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_P() unimplemented");
// Ensure there is more content.
if (packet.GetBytesLeft () < 1)
return SendIllFormedResponse (packet, "Empty P packet");
// Parse out the register number from the request.
packet.SetFilePos (strlen("P"));
const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (reg_index == std::numeric_limits<uint32_t>::max ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ());
return SendErrorResponse (0x29);
}
// Note debugserver would send an E30 here.
if ((packet.GetBytesLeft () < 1) || (packet.GetChar () != '='))
return SendIllFormedResponse (packet, "P packet missing '=' char after register number");
// Get process architecture.
ArchSpec process_arch;
if (!m_debugged_process_sp || !m_debugged_process_sp->GetArchitecture (process_arch))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to retrieve inferior architecture", __FUNCTION__);
return SendErrorResponse (0x49);
}
// Parse out the value.
const uint64_t raw_value = packet.GetHexMaxU64 (process_arch.GetByteOrder () == lldb::eByteOrderLittle, std::numeric_limits<uint64_t>::max ());
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available (thread index 0)", __FUNCTION__);
return SendErrorResponse (0x28);
}
// Get the thread's register context.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index);
if (!reg_info)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index);
return SendErrorResponse (0x48);
}
// Return the end of registers response if we've iterated one past the end of the register set.
if (reg_index >= reg_context_sp->GetRegisterCount ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetRegisterCount ());
return SendErrorResponse (0x47);
}
// Build the reginfos response.
StreamGDBRemote response;
// FIXME Could be suffixed with a thread: parameter.
// That thread then needs to be fed back into the reg context retrieval above.
Error error = reg_context_sp->WriteRegisterFromUnsigned (reg_info, raw_value);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, write of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ());
return SendErrorResponse (0x32);
}
return SendOKResponse();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_H (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Ensure we're llgs.
if (!IsGdbServer())
return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_H() unimplemented");
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out which variant of $H is requested.
packet.SetFilePos (strlen("H"));
if (packet.GetBytesLeft () < 1)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, H command missing {g,c} variant", __FUNCTION__);
return SendIllFormedResponse (packet, "H command missing {g,c} variant");
}
const char h_variant = packet.GetChar ();
switch (h_variant)
{
case 'g':
break;
case 'c':
break;
default:
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, invalid $H variant %c", __FUNCTION__, h_variant);
return SendIllFormedResponse (packet, "H variant unsupported, should be c or g");
}
// Parse out the thread number.
// FIXME return a parse success/fail value. All values are valid here.
const lldb::tid_t tid = packet.GetHexMaxU64 (false, std::numeric_limits<lldb::tid_t>::max ());
// Ensure we have the given thread when not specifying -1 (all threads) or 0 (any thread).
if (tid != LLDB_INVALID_THREAD_ID && tid != 0)
{
NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid));
if (!thread_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, tid %" PRIu64 " not found", __FUNCTION__, tid);
return SendErrorResponse (0x15);
}
}
// Now switch the given thread type.
switch (h_variant)
{
case 'g':
SetCurrentThreadID (tid);
break;
case 'c':
SetContinueThreadID (tid);
break;
default:
assert (false && "unsupported $H variant - shouldn't get here");
return SendIllFormedResponse (packet, "H variant unsupported, should be c or g");
}
return SendOKResponse();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_interrupt (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
// Ensure we're llgs.
if (!IsGdbServer())
{
// Only supported on llgs
return SendUnimplementedResponse ("");
}
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Interrupt the process.
Error error = m_debugged_process_sp->Interrupt ();
if (error.Fail ())
{
if (log)
{
log->Printf ("GDBRemoteCommunicationServer::%s failed for process %" PRIu64 ": %s",
__FUNCTION__,
m_debugged_process_sp->GetID (),
error.AsCString ());
}
return SendErrorResponse (GDBRemoteServerError::eErrorResume);
}
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s stopped process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ());
// No response required from stop all.
return PacketResult::Success;
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_m (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Ensure we're llgs.
if (!IsGdbServer())
{
// Only supported on llgs
return SendUnimplementedResponse ("");
}
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out the memory address.
packet.SetFilePos (strlen("m"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short m packet");
// Read the address. Punting on validation.
// FIXME replace with Hex U64 read with no default value that fails on failed read.
const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0);
// Validate comma.
if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ','))
return SendIllFormedResponse(packet, "Comma sep missing in m packet");
// Get # bytes to read.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Length missing in m packet");
const uint64_t byte_count = packet.GetHexMaxU64(false, 0);
if (byte_count == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s nothing to read: zero-length packet", __FUNCTION__);
return PacketResult::Success;
}
// Allocate the response buffer.
std::string buf(byte_count, '\0');
if (buf.empty())
return SendErrorResponse (0x78);
// Retrieve the process memory.
lldb::addr_t bytes_read = 0;
lldb_private::Error error = m_debugged_process_sp->ReadMemory (read_addr, &buf[0], byte_count, bytes_read);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to read. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, error.AsCString ());
return SendErrorResponse (0x08);
}
if (bytes_read == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": read %" PRIu64 " of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, bytes_read, byte_count);
return SendErrorResponse (0x08);
}
StreamGDBRemote response;
for (lldb::addr_t i = 0; i < bytes_read; ++i)
response.PutHex8(buf[i]);
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_QSetDetachOnError (StringExtractorGDBRemote &packet)
{
packet.SetFilePos(::strlen ("QSetDetachOnError:"));
if (packet.GetU32(0))
m_process_launch_info.GetFlags().Set (eLaunchFlagDetachOnError);
else
m_process_launch_info.GetFlags().Clear (eLaunchFlagDetachOnError);
return SendOKResponse ();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_M (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Ensure we're llgs.
if (!IsGdbServer())
{
// Only supported on llgs
return SendUnimplementedResponse ("");
}
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out the memory address.
packet.SetFilePos (strlen("M"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short M packet");
// Read the address. Punting on validation.
// FIXME replace with Hex U64 read with no default value that fails on failed read.
const lldb::addr_t write_addr = packet.GetHexMaxU64(false, 0);
// Validate comma.
if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ','))
return SendIllFormedResponse(packet, "Comma sep missing in M packet");
// Get # bytes to read.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Length missing in M packet");
const uint64_t byte_count = packet.GetHexMaxU64(false, 0);
if (byte_count == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s nothing to write: zero-length packet", __FUNCTION__);
return PacketResult::Success;
}
// Validate colon.
if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ':'))
return SendIllFormedResponse(packet, "Comma sep missing in M packet after byte length");
// Allocate the conversion buffer.
std::vector<uint8_t> buf(byte_count, 0);
if (buf.empty())
return SendErrorResponse (0x78);
// Convert the hex memory write contents to bytes.
StreamGDBRemote response;
const uint64_t convert_count = static_cast<uint64_t> (packet.GetHexBytes (&buf[0], byte_count, 0));
if (convert_count != byte_count)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": asked to write %" PRIu64 " bytes, but only found %" PRIu64 " to convert.", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, byte_count, convert_count);
return SendIllFormedResponse (packet, "M content byte length specified did not match hex-encoded content length");
}
// Write the process memory.
lldb::addr_t bytes_written = 0;
lldb_private::Error error = m_debugged_process_sp->WriteMemory (write_addr, &buf[0], byte_count, bytes_written);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to write. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, error.AsCString ());
return SendErrorResponse (0x09);
}
if (bytes_written == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": wrote %" PRIu64 " of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, bytes_written, byte_count);
return SendErrorResponse (0x09);
}
return SendOKResponse ();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("");
// Currently only the NativeProcessProtocol knows if it can handle a qMemoryRegionInfoSupported
// request, but we're not guaranteed to be attached to a process. For now we'll assume the
// client only asks this when a process is being debugged.
// Ensure we have a process running; otherwise, we can't figure this out
// since we won't have a NativeProcessProtocol.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Test if we can get any region back when asking for the region around NULL.
MemoryRegionInfo region_info;
const Error error = m_debugged_process_sp->GetMemoryRegionInfo (0, region_info);
if (error.Fail ())
{
// We don't support memory region info collection for this NativeProcessProtocol.
return SendUnimplementedResponse ("");
}
return SendOKResponse();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("");
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out the memory address.
packet.SetFilePos (strlen("qMemoryRegionInfo:"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short qMemoryRegionInfo: packet");
// Read the address. Punting on validation.
const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0);
StreamGDBRemote response;
// Get the memory region info for the target address.
MemoryRegionInfo region_info;
const Error error = m_debugged_process_sp->GetMemoryRegionInfo (read_addr, region_info);
if (error.Fail ())
{
// Return the error message.
response.PutCString ("error:");
response.PutCStringAsRawHex8 (error.AsCString ());
response.PutChar (';');
}
else
{
// Range start and size.
response.Printf ("start:%" PRIx64 ";size:%" PRIx64 ";", region_info.GetRange ().GetRangeBase (), region_info.GetRange ().GetByteSize ());
// Permissions.
if (region_info.GetReadable () ||
region_info.GetWritable () ||
region_info.GetExecutable ())
{
// Write permissions info.
response.PutCString ("permissions:");
if (region_info.GetReadable ())
response.PutChar ('r');
if (region_info.GetWritable ())
response.PutChar('w');
if (region_info.GetExecutable())
response.PutChar ('x');
response.PutChar (';');
}
}
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_Z (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("");
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out software or hardware breakpoint requested.
packet.SetFilePos (strlen("Z"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short Z packet, missing software/hardware specifier");
bool want_breakpoint = true;
bool want_hardware = false;
const char breakpoint_type_char = packet.GetChar ();
switch (breakpoint_type_char)
{
case '0': want_hardware = false; want_breakpoint = true; break;
case '1': want_hardware = true; want_breakpoint = true; break;
case '2': want_breakpoint = false; break;
case '3': want_breakpoint = false; break;
default:
return SendIllFormedResponse(packet, "Z packet had invalid software/hardware specifier");
}
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after breakpoint type");
// FIXME implement watchpoint support.
if (!want_breakpoint)
return SendUnimplementedResponse ("watchpoint support not yet implemented");
// Parse out the breakpoint address.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short Z packet, missing address");
const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0);
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after address");
// Parse out the breakpoint kind (i.e. size hint for opcode size).
const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (kind == std::numeric_limits<uint32_t>::max ())
return SendIllFormedResponse(packet, "Malformed Z packet, failed to parse kind argument");
if (want_breakpoint)
{
// Try to set the breakpoint.
const Error error = m_debugged_process_sp->SetBreakpoint (breakpoint_addr, kind, want_hardware);
if (error.Success ())
return SendOKResponse ();
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to set breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x09);
}
}
// FIXME fix up after watchpoints are handled.
return SendUnimplementedResponse ("");
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_z (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("");
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
// Parse out software or hardware breakpoint requested.
packet.SetFilePos (strlen("z"));
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short z packet, missing software/hardware specifier");
bool want_breakpoint = true;
const char breakpoint_type_char = packet.GetChar ();
switch (breakpoint_type_char)
{
case '0': want_breakpoint = true; break;
case '1': want_breakpoint = true; break;
case '2': want_breakpoint = false; break;
case '3': want_breakpoint = false; break;
default:
return SendIllFormedResponse(packet, "z packet had invalid software/hardware specifier");
}
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after breakpoint type");
// FIXME implement watchpoint support.
if (!want_breakpoint)
return SendUnimplementedResponse ("watchpoint support not yet implemented");
// Parse out the breakpoint address.
if (packet.GetBytesLeft() < 1)
return SendIllFormedResponse(packet, "Too short z packet, missing address");
const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0);
if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',')
return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after address");
// Parse out the breakpoint kind (i.e. size hint for opcode size).
const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ());
if (kind == std::numeric_limits<uint32_t>::max ())
return SendIllFormedResponse(packet, "Malformed z packet, failed to parse kind argument");
if (want_breakpoint)
{
// Try to clear the breakpoint.
const Error error = m_debugged_process_sp->RemoveBreakpoint (breakpoint_addr);
if (error.Success ())
return SendOKResponse ();
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to remove breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x09);
}
}
// FIXME fix up after watchpoints are handled.
return SendUnimplementedResponse ("");
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_s (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("");
// Ensure we have a process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x32);
}
// We first try to use a continue thread id. If any one or any all set, use the current thread.
// Bail out if we don't have a thread id.
lldb::tid_t tid = GetContinueThreadID ();
if (tid == 0 || tid == LLDB_INVALID_THREAD_ID)
tid = GetCurrentThreadID ();
if (tid == LLDB_INVALID_THREAD_ID)
return SendErrorResponse (0x33);
// Double check that we have such a thread.
// TODO investigate: on MacOSX we might need to do an UpdateThreads () here.
NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetThreadByID (tid);
if (!thread_sp || thread_sp->GetID () != tid)
return SendErrorResponse (0x33);
// Create the step action for the given thread.
lldb_private::ResumeAction action = { tid, eStateStepping, 0 };
// Setup the actions list.
lldb_private::ResumeActionList actions;
actions.Append (action);
// All other threads stop while we're single stepping a thread.
actions.SetDefaultThreadActionIfNeeded(eStateStopped, 0);
Error error = m_debugged_process_sp->Resume (actions);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " Resume() failed with error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), tid, error.AsCString ());
return SendErrorResponse(0x49);
}
// No response here - the stop or exit will come from the resulting action.
return PacketResult::Success;
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_qSupported (StringExtractorGDBRemote &packet)
{
StreamGDBRemote response;
// Features common to lldb-platform and llgs.
uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet size--debugger can always use less
response.Printf ("PacketSize=%x", max_packet_size);
response.PutCString (";QStartNoAckMode+");
response.PutCString (";QThreadSuffixSupported+");
response.PutCString (";QListThreadsInStopReply+");
#if defined(__linux__)
response.PutCString (";qXfer:auxv:read+");
#endif
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_QThreadSuffixSupported (StringExtractorGDBRemote &packet)
{
m_thread_suffix_supported = true;
return SendOKResponse();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_QListThreadsInStopReply (StringExtractorGDBRemote &packet)
{
m_list_threads_in_stop_reply = true;
return SendOKResponse();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet)
{
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("only supported for lldb-gdbserver");
// *BSD impls should be able to do this too.
#if defined(__linux__)
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Parse out the offset.
packet.SetFilePos (strlen("qXfer:auxv:read::"));
if (packet.GetBytesLeft () < 1)
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset");
const uint64_t auxv_offset = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ());
if (auxv_offset == std::numeric_limits<uint64_t>::max ())
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset");
// Parse out comma.
if (packet.GetBytesLeft () < 1 || packet.GetChar () != ',')
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing comma after offset");
// Parse out the length.
const uint64_t auxv_length = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ());
if (auxv_length == std::numeric_limits<uint64_t>::max ())
return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing length");
// Grab the auxv data if we need it.
if (!m_active_auxv_buffer_sp)
{
// Make sure we have a valid process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x10);
}
// Grab the auxv data.
m_active_auxv_buffer_sp = Host::GetAuxvData (m_debugged_process_sp->GetID ());
if (!m_active_auxv_buffer_sp || m_active_auxv_buffer_sp->GetByteSize () == 0)
{
// Hmm, no auxv data, call that an error.
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no auxv data retrieved", __FUNCTION__);
m_active_auxv_buffer_sp.reset ();
return SendErrorResponse (0x11);
}
}
// FIXME find out if/how I lock the stream here.
StreamGDBRemote response;
bool done_with_buffer = false;
if (auxv_offset >= m_active_auxv_buffer_sp->GetByteSize ())
{
// We have nothing left to send. Mark the buffer as complete.
response.PutChar ('l');
done_with_buffer = true;
}
else
{
// Figure out how many bytes are available starting at the given offset.
const uint64_t bytes_remaining = m_active_auxv_buffer_sp->GetByteSize () - auxv_offset;
// Figure out how many bytes we're going to read.
const uint64_t bytes_to_read = (auxv_length > bytes_remaining) ? bytes_remaining : auxv_length;
// Mark the response type according to whether we're reading the remainder of the auxv data.
if (bytes_to_read >= bytes_remaining)
{
// There will be nothing left to read after this
response.PutChar ('l');
done_with_buffer = true;
}
else
{
// There will still be bytes to read after this request.
response.PutChar ('m');
}
// Now write the data in encoded binary form.
response.PutEscapedBytes (m_active_auxv_buffer_sp->GetBytes () + auxv_offset, bytes_to_read);
}
if (done_with_buffer)
m_active_auxv_buffer_sp.reset ();
return SendPacketNoLock(response.GetData(), response.GetSize());
#else
return SendUnimplementedResponse ("not implemented on this platform");
#endif
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_QSaveRegisterState (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("only supported for lldb-gdbserver");
// Move past packet name.
packet.SetFilePos (strlen ("QSaveRegisterState"));
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (m_thread_suffix_supported)
return SendIllFormedResponse (packet, "No thread specified in QSaveRegisterState packet");
else
return SendIllFormedResponse (packet, "No thread was is set with the Hg packet");
}
// Grab the register context for the thread.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
// Save registers to a buffer.
DataBufferSP register_data_sp;
Error error = reg_context_sp->ReadAllRegisterValues (register_data_sp);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to save all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x75);
}
// Allocate a new save id.
const uint32_t save_id = GetNextSavedRegistersID ();
assert ((m_saved_registers_map.find (save_id) == m_saved_registers_map.end ()) && "GetNextRegisterSaveID() returned an existing register save id");
// Save the register data buffer under the save id.
{
Mutex::Locker locker (m_saved_registers_mutex);
m_saved_registers_map[save_id] = register_data_sp;
}
// Write the response.
StreamGDBRemote response;
response.Printf ("%" PRIu32, save_id);
return SendPacketNoLock(response.GetData(), response.GetSize());
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("only supported for lldb-gdbserver");
// Parse out save id.
packet.SetFilePos (strlen ("QRestoreRegisterState:"));
if (packet.GetBytesLeft () < 1)
return SendIllFormedResponse (packet, "QRestoreRegisterState packet missing register save id");
const uint32_t save_id = packet.GetU32 (0);
if (save_id == 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s QRestoreRegisterState packet has malformed save id, expecting decimal uint32_t", __FUNCTION__);
return SendErrorResponse (0x76);
}
// Get the thread to use.
NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet);
if (!thread_sp)
{
if (m_thread_suffix_supported)
return SendIllFormedResponse (packet, "No thread specified in QRestoreRegisterState packet");
else
return SendIllFormedResponse (packet, "No thread was is set with the Hg packet");
}
// Grab the register context for the thread.
NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ());
if (!reg_context_sp)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ());
return SendErrorResponse (0x15);
}
// Retrieve register state buffer, then remove from the list.
DataBufferSP register_data_sp;
{
Mutex::Locker locker (m_saved_registers_mutex);
// Find the register set buffer for the given save id.
auto it = m_saved_registers_map.find (save_id);
if (it == m_saved_registers_map.end ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " does not have a register set save buffer for id %" PRIu32, __FUNCTION__, m_debugged_process_sp->GetID (), save_id);
return SendErrorResponse (0x77);
}
register_data_sp = it->second;
// Remove it from the map.
m_saved_registers_map.erase (it);
}
Error error = reg_context_sp->WriteAllRegisterValues (register_data_sp);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to restore all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x77);
}
return SendOKResponse();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_vAttach (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("only supported for lldb-gdbserver");
// Consume the ';' after vAttach.
packet.SetFilePos (strlen ("vAttach"));
if (!packet.GetBytesLeft () || packet.GetChar () != ';')
return SendIllFormedResponse (packet, "vAttach missing expected ';'");
// Grab the PID to which we will attach (assume hex encoding).
lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16);
if (pid == LLDB_INVALID_PROCESS_ID)
return SendIllFormedResponse (packet, "vAttach failed to parse the process id");
// Attempt to attach.
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s attempting to attach to pid %" PRIu64, __FUNCTION__, pid);
Error error = AttachToProcess (pid);
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to attach to pid %" PRIu64 ": %s\n", __FUNCTION__, pid, error.AsCString());
return SendErrorResponse (0x01);
}
// Notify we attached by sending a stop packet.
return SendStopReasonForState (m_debugged_process_sp->GetState (), true);
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_D (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("only supported for lldb-gdbserver");
// Scope for mutex locker.
Mutex::Locker locker (m_spawned_pids_mutex);
// Fail if we don't have a current process.
if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID))
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__);
return SendErrorResponse (0x15);
}
if (m_spawned_pids.find(m_debugged_process_sp->GetID ()) == m_spawned_pids.end())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to find PID %" PRIu64 " in spawned pids list",
__FUNCTION__, m_debugged_process_sp->GetID ());
return SendErrorResponse (0x1);
}
lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
// Consume the ';' after D.
packet.SetFilePos (1);
if (packet.GetBytesLeft ())
{
if (packet.GetChar () != ';')
return SendIllFormedResponse (packet, "D missing expected ';'");
// Grab the PID from which we will detach (assume hex encoding).
pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16);
if (pid == LLDB_INVALID_PROCESS_ID)
return SendIllFormedResponse (packet, "D failed to parse the process id");
}
if (pid != LLDB_INVALID_PROCESS_ID &&
m_debugged_process_sp->GetID () != pid)
{
return SendIllFormedResponse (packet, "Invalid pid");
}
if (m_stdio_communication.IsConnected ())
{
m_stdio_communication.StopReadThread ();
}
const Error error = m_debugged_process_sp->Detach ();
if (error.Fail ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed to detach from pid %" PRIu64 ": %s\n",
__FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ());
return SendErrorResponse (0x01);
}
m_spawned_pids.erase (m_debugged_process_sp->GetID ());
return SendOKResponse ();
}
GDBRemoteCommunicationServer::PacketResult
GDBRemoteCommunicationServer::Handle_qThreadStopInfo (StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// We don't support if we're not llgs.
if (!IsGdbServer())
return SendUnimplementedResponse ("only supported for lldb-gdbserver");
packet.SetFilePos (strlen("qThreadStopInfo"));
const lldb::tid_t tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID);
if (tid == LLDB_INVALID_THREAD_ID)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse thread id from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ());
return SendErrorResponse (0x15);
}
return SendStopReplyPacketForThread (tid);
}
void
GDBRemoteCommunicationServer::FlushInferiorOutput ()
{
// If we're not monitoring an inferior's terminal, ignore this.
if (!m_stdio_communication.IsConnected())
return;
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__);
// FIXME implement a timeout on the join.
m_stdio_communication.JoinReadThread();
}
void
GDBRemoteCommunicationServer::MaybeCloseInferiorTerminalConnection ()
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
// Tell the stdio connection to shut down.
if (m_stdio_communication.IsConnected())
{
auto connection = m_stdio_communication.GetConnection();
if (connection)
{
Error error;
connection->Disconnect (&error);
if (error.Success ())
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - SUCCESS", __FUNCTION__);
}
else
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - FAIL: %s", __FUNCTION__, error.AsCString ());
}
}
}
}
lldb_private::NativeThreadProtocolSP
GDBRemoteCommunicationServer::GetThreadFromSuffix (StringExtractorGDBRemote &packet)
{
NativeThreadProtocolSP thread_sp;
// We have no thread if we don't have a process.
if (!m_debugged_process_sp || m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)
return thread_sp;
// If the client hasn't asked for thread suffix support, there will not be a thread suffix.
// Use the current thread in that case.
if (!m_thread_suffix_supported)
{
const lldb::tid_t current_tid = GetCurrentThreadID ();
if (current_tid == LLDB_INVALID_THREAD_ID)
return thread_sp;
else if (current_tid == 0)
{
// Pick a thread.
return m_debugged_process_sp->GetThreadAtIndex (0);
}
else
return m_debugged_process_sp->GetThreadByID (current_tid);
}
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD));
// Parse out the ';'.
if (packet.GetBytesLeft () < 1 || packet.GetChar () != ';')
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected ';' prior to start of thread suffix: packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ());
return thread_sp;
}
if (!packet.GetBytesLeft ())
return thread_sp;
// Parse out thread: portion.
if (strncmp (packet.Peek (), "thread:", strlen("thread:")) != 0)
{
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected 'thread:' but not found, packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ());
return thread_sp;
}
packet.SetFilePos (packet.GetFilePos () + strlen("thread:"));
const lldb::tid_t tid = packet.GetHexMaxU64(false, 0);
if (tid != 0)
return m_debugged_process_sp->GetThreadByID (tid);
return thread_sp;
}
lldb::tid_t
GDBRemoteCommunicationServer::GetCurrentThreadID () const
{
if (m_current_tid == 0 || m_current_tid == LLDB_INVALID_THREAD_ID)
{
// Use whatever the debug process says is the current thread id
// since the protocol either didn't specify or specified we want
// any/all threads marked as the current thread.
if (!m_debugged_process_sp)
return LLDB_INVALID_THREAD_ID;
return m_debugged_process_sp->GetCurrentThreadID ();
}
// Use the specific current thread id set by the gdb remote protocol.
return m_current_tid;
}
uint32_t
GDBRemoteCommunicationServer::GetNextSavedRegistersID ()
{
Mutex::Locker locker (m_saved_registers_mutex);
return m_next_saved_registers_id++;
}
void
GDBRemoteCommunicationServer::ClearProcessSpecificData ()
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|GDBR_LOG_PROCESS));
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s()", __FUNCTION__);
// Clear any auxv cached data.
// *BSD impls should be able to do this too.
#if defined(__linux__)
if (log)
log->Printf ("GDBRemoteCommunicationServer::%s clearing auxv buffer (previously %s)",
__FUNCTION__,
m_active_auxv_buffer_sp ? "was set" : "was not set");
m_active_auxv_buffer_sp.reset ();
#endif
}