| //===-- GDBRemoteCommunication.cpp ------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| |
| #include "GDBRemoteCommunication.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| #include "llvm/ADT/Triple.h" |
| #include "lldb/Interpreter/Args.h" |
| #include "lldb/Core/ConnectionFileDescriptor.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Host/TimeValue.h" |
| |
| // Project includes |
| #include "Utility/StringExtractorGDBRemote.h" |
| #include "ProcessGDBRemote.h" |
| #include "ProcessGDBRemoteLog.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // GDBRemoteCommunication constructor |
| //---------------------------------------------------------------------- |
| GDBRemoteCommunication::GDBRemoteCommunication() : |
| Communication("gdb-remote.packets"), |
| m_supports_not_sending_acks (eLazyBoolCalculate), |
| m_supports_thread_suffix (eLazyBoolCalculate), |
| m_supports_qHostInfo (eLazyBoolCalculate), |
| m_supports_vCont_all (eLazyBoolCalculate), |
| m_supports_vCont_any (eLazyBoolCalculate), |
| m_supports_vCont_c (eLazyBoolCalculate), |
| m_supports_vCont_C (eLazyBoolCalculate), |
| m_supports_vCont_s (eLazyBoolCalculate), |
| m_supports_vCont_S (eLazyBoolCalculate), |
| m_rx_packet_listener ("gdbremote.rx_packet"), |
| m_sequence_mutex (Mutex::eMutexTypeRecursive), |
| m_public_is_running (false), |
| m_private_is_running (false), |
| m_async_mutex (Mutex::eMutexTypeRecursive), |
| m_async_packet_predicate (false), |
| m_async_packet (), |
| m_async_response (), |
| m_async_timeout (UINT32_MAX), |
| m_async_signal (-1), |
| m_arch(), |
| m_os(), |
| m_vendor(), |
| m_byte_order(lldb::endian::InlHostByteOrder()), |
| m_pointer_byte_size(0) |
| { |
| m_rx_packet_listener.StartListeningForEvents(this, |
| Communication::eBroadcastBitPacketAvailable | |
| Communication::eBroadcastBitReadThreadDidExit); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| GDBRemoteCommunication::~GDBRemoteCommunication() |
| { |
| m_rx_packet_listener.StopListeningForEvents(this, |
| Communication::eBroadcastBitPacketAvailable | |
| Communication::eBroadcastBitReadThreadDidExit); |
| if (IsConnected()) |
| { |
| StopReadThread(); |
| Disconnect(); |
| } |
| } |
| |
| |
| char |
| GDBRemoteCommunication::CalculcateChecksum (const char *payload, size_t payload_length) |
| { |
| int checksum = 0; |
| |
| // We only need to compute the checksum if we are sending acks |
| if (GetSendAcks ()) |
| { |
| for (size_t i = 0; i < payload_length; ++i) |
| checksum += payload[i]; |
| } |
| return checksum & 255; |
| } |
| |
| size_t |
| GDBRemoteCommunication::SendAck () |
| { |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PACKETS)); |
| if (log) |
| log->Printf ("send packet: +"); |
| ConnectionStatus status = eConnectionStatusSuccess; |
| char ack_char = '+'; |
| return Write (&ack_char, 1, status, NULL) == 1; |
| } |
| |
| size_t |
| GDBRemoteCommunication::SendNack () |
| { |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PACKETS)); |
| if (log) |
| log->Printf ("send packet: -"); |
| ConnectionStatus status = eConnectionStatusSuccess; |
| char nack_char = '-'; |
| return Write (&nack_char, 1, status, NULL) == 1; |
| } |
| |
| bool |
| GDBRemoteCommunication::GetSendAcks () |
| { |
| if (m_supports_not_sending_acks == eLazyBoolCalculate) |
| { |
| StringExtractorGDBRemote response; |
| m_supports_not_sending_acks = eLazyBoolNo; |
| if (SendPacketAndWaitForResponse("QStartNoAckMode", response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| m_supports_not_sending_acks = eLazyBoolYes; |
| } |
| } |
| return m_supports_not_sending_acks != eLazyBoolYes; |
| } |
| |
| void |
| GDBRemoteCommunication::ResetDiscoverableSettings() |
| { |
| m_supports_not_sending_acks = eLazyBoolCalculate; |
| m_supports_thread_suffix = eLazyBoolCalculate; |
| m_supports_qHostInfo = eLazyBoolCalculate; |
| m_supports_vCont_c = eLazyBoolCalculate; |
| m_supports_vCont_C = eLazyBoolCalculate; |
| m_supports_vCont_s = eLazyBoolCalculate; |
| m_supports_vCont_S = eLazyBoolCalculate; |
| m_arch.Clear(); |
| m_os.Clear(); |
| m_vendor.Clear(); |
| m_byte_order = lldb::endian::InlHostByteOrder(); |
| m_pointer_byte_size = 0; |
| } |
| |
| |
| bool |
| GDBRemoteCommunication::GetThreadSuffixSupported () |
| { |
| if (m_supports_thread_suffix == eLazyBoolCalculate) |
| { |
| StringExtractorGDBRemote response; |
| m_supports_thread_suffix = eLazyBoolNo; |
| if (SendPacketAndWaitForResponse("QThreadSuffixSupported", response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| m_supports_thread_suffix = eLazyBoolYes; |
| } |
| } |
| return m_supports_thread_suffix; |
| } |
| bool |
| GDBRemoteCommunication::GetVContSupported (char flavor) |
| { |
| if (m_supports_vCont_c == eLazyBoolCalculate) |
| { |
| StringExtractorGDBRemote response; |
| m_supports_vCont_any = eLazyBoolNo; |
| m_supports_vCont_all = eLazyBoolNo; |
| m_supports_vCont_c = eLazyBoolNo; |
| m_supports_vCont_C = eLazyBoolNo; |
| m_supports_vCont_s = eLazyBoolNo; |
| m_supports_vCont_S = eLazyBoolNo; |
| if (SendPacketAndWaitForResponse("vCont?", response, 1, false)) |
| { |
| const char *response_cstr = response.GetStringRef().c_str(); |
| if (::strstr (response_cstr, ";c")) |
| m_supports_vCont_c = eLazyBoolYes; |
| |
| if (::strstr (response_cstr, ";C")) |
| m_supports_vCont_C = eLazyBoolYes; |
| |
| if (::strstr (response_cstr, ";s")) |
| m_supports_vCont_s = eLazyBoolYes; |
| |
| if (::strstr (response_cstr, ";S")) |
| m_supports_vCont_S = eLazyBoolYes; |
| |
| if (m_supports_vCont_c == eLazyBoolYes && |
| m_supports_vCont_C == eLazyBoolYes && |
| m_supports_vCont_s == eLazyBoolYes && |
| m_supports_vCont_S == eLazyBoolYes) |
| { |
| m_supports_vCont_all = eLazyBoolYes; |
| } |
| |
| if (m_supports_vCont_c == eLazyBoolYes || |
| m_supports_vCont_C == eLazyBoolYes || |
| m_supports_vCont_s == eLazyBoolYes || |
| m_supports_vCont_S == eLazyBoolYes) |
| { |
| m_supports_vCont_any = eLazyBoolYes; |
| } |
| } |
| } |
| |
| switch (flavor) |
| { |
| case 'a': return m_supports_vCont_any; |
| case 'A': return m_supports_vCont_all; |
| case 'c': return m_supports_vCont_c; |
| case 'C': return m_supports_vCont_C; |
| case 's': return m_supports_vCont_s; |
| case 'S': return m_supports_vCont_S; |
| default: break; |
| } |
| return false; |
| } |
| |
| |
| size_t |
| GDBRemoteCommunication::SendPacketAndWaitForResponse |
| ( |
| const char *payload, |
| StringExtractorGDBRemote &response, |
| uint32_t timeout_seconds, |
| bool send_async |
| ) |
| { |
| return SendPacketAndWaitForResponse (payload, |
| ::strlen (payload), |
| response, |
| timeout_seconds, |
| send_async); |
| } |
| |
| size_t |
| GDBRemoteCommunication::SendPacketAndWaitForResponse |
| ( |
| const char *payload, |
| size_t payload_length, |
| StringExtractorGDBRemote &response, |
| uint32_t timeout_seconds, |
| bool send_async |
| ) |
| { |
| Mutex::Locker locker; |
| TimeValue timeout_time; |
| timeout_time = TimeValue::Now(); |
| timeout_time.OffsetWithSeconds (timeout_seconds); |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| |
| if (GetSequenceMutex (locker)) |
| { |
| if (SendPacketNoLock (payload, strlen(payload))) |
| return WaitForPacketNoLock (response, &timeout_time); |
| } |
| else |
| { |
| if (send_async) |
| { |
| Mutex::Locker async_locker (m_async_mutex); |
| m_async_packet.assign(payload, payload_length); |
| m_async_timeout = timeout_seconds; |
| m_async_packet_predicate.SetValue (true, eBroadcastNever); |
| |
| if (log) |
| log->Printf ("async: async packet = %s", m_async_packet.c_str()); |
| |
| bool timed_out = false; |
| bool sent_interrupt = false; |
| if (SendInterrupt(locker, 2, sent_interrupt, timed_out)) |
| { |
| if (sent_interrupt) |
| { |
| if (log) |
| log->Printf ("async: sent interrupt"); |
| if (m_async_packet_predicate.WaitForValueEqualTo (false, &timeout_time, &timed_out)) |
| { |
| if (log) |
| log->Printf ("async: got response"); |
| response = m_async_response; |
| return response.GetStringRef().size(); |
| } |
| else |
| { |
| if (log) |
| log->Printf ("async: timed out waiting for response"); |
| } |
| |
| // Make sure we wait until the continue packet has been sent again... |
| if (m_private_is_running.WaitForValueEqualTo (true, &timeout_time, &timed_out)) |
| { |
| if (log) |
| log->Printf ("async: timed out waiting for process to resume"); |
| } |
| } |
| else |
| { |
| // We had a racy condition where we went to send the interrupt |
| // yet we were able to get the loc |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("async: failed to interrupt"); |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("mutex taken and send_async == false, aborting packet"); |
| } |
| } |
| return 0; |
| } |
| |
| //template<typename _Tp> |
| //class ScopedValueChanger |
| //{ |
| //public: |
| // // Take a value reference and the value to assign it to when this class |
| // // instance goes out of scope. |
| // ScopedValueChanger (_Tp &value_ref, _Tp value) : |
| // m_value_ref (value_ref), |
| // m_value (value) |
| // { |
| // } |
| // |
| // // This object is going out of scope, change the value pointed to by |
| // // m_value_ref to the value we got during construction which was stored in |
| // // m_value; |
| // ~ScopedValueChanger () |
| // { |
| // m_value_ref = m_value; |
| // } |
| //protected: |
| // _Tp &m_value_ref; // A reference to the value we will change when this object destructs |
| // _Tp m_value; // The value to assign to m_value_ref when this goes out of scope. |
| //}; |
| |
| StateType |
| GDBRemoteCommunication::SendContinuePacketAndWaitForResponse |
| ( |
| ProcessGDBRemote *process, |
| const char *payload, |
| size_t packet_length, |
| StringExtractorGDBRemote &response |
| ) |
| { |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s ()", __FUNCTION__); |
| |
| Mutex::Locker locker(m_sequence_mutex); |
| StateType state = eStateRunning; |
| |
| BroadcastEvent(eBroadcastBitRunPacketSent, NULL); |
| m_public_is_running.SetValue (true, eBroadcastNever); |
| // Set the starting continue packet into "continue_packet". This packet |
| // make change if we are interrupted and we continue after an async packet... |
| std::string continue_packet(payload, packet_length); |
| |
| while (state == eStateRunning) |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () sending continue packet: %s", __FUNCTION__, continue_packet.c_str()); |
| if (SendPacket(continue_packet.c_str(), continue_packet.size()) == 0) |
| state = eStateInvalid; |
| |
| m_private_is_running.SetValue (true, eBroadcastNever); |
| |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () WaitForPacket(%.*s)", __FUNCTION__); |
| |
| if (WaitForPacket (response, (TimeValue*)NULL)) |
| { |
| if (response.Empty()) |
| state = eStateInvalid; |
| else |
| { |
| const char stop_type = response.GetChar(); |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () got packet: %s", __FUNCTION__, response.GetStringRef().c_str()); |
| switch (stop_type) |
| { |
| case 'T': |
| case 'S': |
| if (process->GetStopID() == 0) |
| { |
| if (process->GetID() == LLDB_INVALID_PROCESS_ID) |
| { |
| lldb::pid_t pid = GetCurrentProcessID (1); |
| if (pid != LLDB_INVALID_PROCESS_ID) |
| process->SetID (pid); |
| } |
| process->BuildDynamicRegisterInfo (true); |
| } |
| |
| // Privately notify any internal threads that we have stopped |
| // in case we wanted to interrupt our process, yet we might |
| // send a packet and continue without returning control to the |
| // user. |
| m_private_is_running.SetValue (false, eBroadcastAlways); |
| if (m_async_signal != -1) |
| { |
| if (log) |
| log->Printf ("async: send signo = %s", Host::GetSignalAsCString (m_async_signal)); |
| |
| // Save off the async signal we are supposed to send |
| const int async_signal = m_async_signal; |
| // Clear the async signal member so we don't end up |
| // sending the signal multiple times... |
| m_async_signal = -1; |
| // Check which signal we stopped with |
| uint8_t signo = response.GetHexU8(255); |
| if (signo == async_signal) |
| { |
| if (log) |
| log->Printf ("async: stopped with signal %s, we are done running", Host::GetSignalAsCString (signo)); |
| |
| // We already stopped with a signal that we wanted |
| // to stop with, so we are done |
| response.SetFilePos (0); |
| } |
| else |
| { |
| // We stopped with a different signal that the one |
| // we wanted to stop with, so now we must resume |
| // with the signal we want |
| char signal_packet[32]; |
| int signal_packet_len = 0; |
| signal_packet_len = ::snprintf (signal_packet, |
| sizeof (signal_packet), |
| "C%2.2x", |
| async_signal); |
| |
| if (log) |
| log->Printf ("async: stopped with signal %s, resume with %s", |
| Host::GetSignalAsCString (signo), |
| Host::GetSignalAsCString (async_signal)); |
| |
| // Set the continue packet to resume... |
| continue_packet.assign(signal_packet, signal_packet_len); |
| continue; |
| } |
| } |
| else if (m_async_packet_predicate.GetValue()) |
| { |
| // We are supposed to send an asynchronous packet while |
| // we are running. |
| m_async_response.Clear(); |
| if (m_async_packet.empty()) |
| { |
| if (log) |
| log->Printf ("async: error: empty async packet"); |
| |
| } |
| else |
| { |
| if (log) |
| log->Printf ("async: sending packet: %s", |
| m_async_packet.c_str()); |
| |
| SendPacketAndWaitForResponse (&m_async_packet[0], |
| m_async_packet.size(), |
| m_async_response, |
| m_async_timeout, |
| false); |
| } |
| // Let the other thread that was trying to send the async |
| // packet know that the packet has been sent and response is |
| // ready... |
| m_async_packet_predicate.SetValue(false, eBroadcastAlways); |
| |
| // Set the continue packet to resume... |
| continue_packet.assign (1, 'c'); |
| continue; |
| } |
| // Stop with signal and thread info |
| state = eStateStopped; |
| break; |
| |
| case 'W': |
| case 'X': |
| // process exited |
| state = eStateExited; |
| break; |
| |
| case 'O': |
| // STDOUT |
| { |
| std::string inferior_stdout; |
| inferior_stdout.reserve(response.GetBytesLeft () / 2); |
| char ch; |
| while ((ch = response.GetHexU8()) != '\0') |
| inferior_stdout.append(1, ch); |
| process->AppendSTDOUT (inferior_stdout.c_str(), inferior_stdout.size()); |
| } |
| break; |
| |
| case 'E': |
| // ERROR |
| state = eStateInvalid; |
| break; |
| |
| default: |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () unrecognized async packet", __FUNCTION__); |
| state = eStateInvalid; |
| break; |
| } |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () WaitForPacket(...) => false", __FUNCTION__); |
| state = eStateInvalid; |
| } |
| } |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () => %s", __FUNCTION__, StateAsCString(state)); |
| response.SetFilePos(0); |
| m_private_is_running.SetValue (false, eBroadcastAlways); |
| m_public_is_running.SetValue (false, eBroadcastAlways); |
| return state; |
| } |
| |
| size_t |
| GDBRemoteCommunication::SendPacket (const char *payload) |
| { |
| Mutex::Locker locker(m_sequence_mutex); |
| return SendPacketNoLock (payload, ::strlen (payload)); |
| } |
| |
| size_t |
| GDBRemoteCommunication::SendPacket (const char *payload, size_t payload_length) |
| { |
| Mutex::Locker locker(m_sequence_mutex); |
| return SendPacketNoLock (payload, payload_length); |
| } |
| |
| size_t |
| GDBRemoteCommunication::SendPacketNoLock (const char *payload, size_t payload_length) |
| { |
| if (IsConnected()) |
| { |
| StreamString packet(0, 4, eByteOrderBig); |
| |
| packet.PutChar('$'); |
| packet.Write (payload, payload_length); |
| packet.PutChar('#'); |
| packet.PutHex8(CalculcateChecksum (payload, payload_length)); |
| |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PACKETS)); |
| if (log) |
| log->Printf ("send packet: %s", packet.GetData()); |
| ConnectionStatus status = eConnectionStatusSuccess; |
| size_t bytes_written = Write (packet.GetData(), packet.GetSize(), status, NULL); |
| if (bytes_written == packet.GetSize()) |
| { |
| if (GetSendAcks ()) |
| { |
| if (GetAck (1) != '+') |
| return 0; |
| } |
| } |
| else |
| { |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PACKETS)); |
| if (log) |
| log->Printf ("error: failed to send packet: %s", packet.GetData()); |
| } |
| return bytes_written; |
| } |
| return 0; |
| } |
| |
| char |
| GDBRemoteCommunication::GetAck (uint32_t timeout_seconds) |
| { |
| StringExtractorGDBRemote response; |
| if (WaitForPacket (response, timeout_seconds) == 1) |
| return response.GetChar(); |
| return 0; |
| } |
| |
| bool |
| GDBRemoteCommunication::GetSequenceMutex (Mutex::Locker& locker) |
| { |
| return locker.TryLock (m_sequence_mutex.GetMutex()); |
| } |
| |
| bool |
| GDBRemoteCommunication::SendAsyncSignal (int signo) |
| { |
| m_async_signal = signo; |
| bool timed_out = false; |
| bool sent_interrupt = false; |
| Mutex::Locker locker; |
| if (SendInterrupt (locker, 1, sent_interrupt, timed_out)) |
| return true; |
| m_async_signal = -1; |
| return false; |
| } |
| |
| // This function takes a mutex locker as a parameter in case the GetSequenceMutex |
| // actually succeeds. If it doesn't succeed in acquiring the sequence mutex |
| // (the expected result), then it will send the halt packet. If it does succeed |
| // then the caller that requested the interrupt will want to keep the sequence |
| // locked down so that no one else can send packets while the caller has control. |
| // This function usually gets called when we are running and need to stop the |
| // target. It can also be used when we are running and and we need to do something |
| // else (like read/write memory), so we need to interrupt the running process |
| // (gdb remote protocol requires this), and do what we need to do, then resume. |
| |
| bool |
| GDBRemoteCommunication::SendInterrupt |
| ( |
| Mutex::Locker& locker, |
| uint32_t seconds_to_wait_for_stop, |
| bool &sent_interrupt, |
| bool &timed_out |
| ) |
| { |
| sent_interrupt = false; |
| timed_out = false; |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| |
| if (IsRunning()) |
| { |
| // Only send an interrupt if our debugserver is running... |
| if (GetSequenceMutex (locker) == false) |
| { |
| // Someone has the mutex locked waiting for a response or for the |
| // inferior to stop, so send the interrupt on the down low... |
| char ctrl_c = '\x03'; |
| ConnectionStatus status = eConnectionStatusSuccess; |
| TimeValue timeout; |
| if (seconds_to_wait_for_stop) |
| { |
| timeout = TimeValue::Now(); |
| timeout.OffsetWithSeconds (seconds_to_wait_for_stop); |
| } |
| size_t bytes_written = Write (&ctrl_c, 1, status, NULL); |
| ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS | GDBR_LOG_PROCESS, "send packet: \\x03"); |
| if (bytes_written > 0) |
| { |
| sent_interrupt = true; |
| if (seconds_to_wait_for_stop) |
| { |
| if (m_private_is_running.WaitForValueEqualTo (false, &timeout, &timed_out)) |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () - sent interrupt, private state stopped", __FUNCTION__); |
| return true; |
| } |
| else |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () - sent interrupt, timed out wating for async thread resume", __FUNCTION__); |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () - sent interrupt, not waiting for stop...", __FUNCTION__); |
| return true; |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () - failed to write interrupt", __FUNCTION__); |
| } |
| return false; |
| } |
| else |
| { |
| if (log) |
| log->Printf ("GDBRemoteCommunication::%s () - got sequence mutex without having to interrupt", __FUNCTION__); |
| } |
| } |
| return true; |
| } |
| |
| bool |
| GDBRemoteCommunication::WaitForNotRunning (const TimeValue *timeout_ptr) |
| { |
| return m_public_is_running.WaitForValueEqualTo (false, timeout_ptr, NULL); |
| } |
| |
| bool |
| GDBRemoteCommunication::WaitForNotRunningPrivate (const TimeValue *timeout_ptr) |
| { |
| return m_private_is_running.WaitForValueEqualTo (false, timeout_ptr, NULL); |
| } |
| |
| size_t |
| GDBRemoteCommunication::WaitForPacket (StringExtractorGDBRemote &response, uint32_t timeout_seconds) |
| { |
| Mutex::Locker locker(m_sequence_mutex); |
| TimeValue timeout_time; |
| timeout_time = TimeValue::Now(); |
| timeout_time.OffsetWithSeconds (timeout_seconds); |
| return WaitForPacketNoLock (response, &timeout_time); |
| } |
| |
| size_t |
| GDBRemoteCommunication::WaitForPacket (StringExtractorGDBRemote &response, const TimeValue* timeout_time_ptr) |
| { |
| Mutex::Locker locker(m_sequence_mutex); |
| return WaitForPacketNoLock (response, timeout_time_ptr); |
| } |
| |
| size_t |
| GDBRemoteCommunication::WaitForPacketNoLock (StringExtractorGDBRemote &response, const TimeValue* timeout_time_ptr) |
| { |
| bool checksum_error = false; |
| response.Clear (); |
| |
| EventSP event_sp; |
| |
| if (m_rx_packet_listener.WaitForEvent (timeout_time_ptr, event_sp)) |
| { |
| const uint32_t event_type = event_sp->GetType(); |
| if (event_type | Communication::eBroadcastBitPacketAvailable) |
| { |
| const EventDataBytes *event_bytes = EventDataBytes::GetEventDataFromEvent(event_sp.get()); |
| if (event_bytes) |
| { |
| const char * packet_data = (const char *)event_bytes->GetBytes(); |
| LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PACKETS)); |
| if (log) |
| log->Printf ("read packet: %s", packet_data); |
| const size_t packet_size = event_bytes->GetByteSize(); |
| if (packet_data && packet_size > 0) |
| { |
| std::string &response_str = response.GetStringRef(); |
| if (packet_data[0] == '$') |
| { |
| bool success = false; |
| if (packet_size < 4) |
| ::fprintf (stderr, "Packet that starts with $ is too short: '%s'\n", packet_data); |
| else if (packet_data[packet_size-3] != '#' || |
| !::isxdigit (packet_data[packet_size-2]) || |
| !::isxdigit (packet_data[packet_size-1])) |
| ::fprintf (stderr, "Invalid checksum footer for packet: '%s'\n", packet_data); |
| else |
| success = true; |
| |
| if (success) |
| response_str.assign (packet_data + 1, packet_size - 4); |
| if (GetSendAcks ()) |
| { |
| char packet_checksum = strtol (&packet_data[packet_size-2], NULL, 16); |
| char actual_checksum = CalculcateChecksum (&response_str[0], response_str.size()); |
| checksum_error = packet_checksum != actual_checksum; |
| // Send the ack or nack if needed |
| if (checksum_error || !success) |
| SendNack(); |
| else |
| SendAck(); |
| } |
| } |
| else |
| { |
| response_str.assign (packet_data, packet_size); |
| } |
| return response_str.size(); |
| } |
| } |
| } |
| else if (Communication::eBroadcastBitReadThreadDidExit) |
| { |
| // Our read thread exited on us so just fall through and return zero... |
| } |
| } |
| return 0; |
| } |
| |
| void |
| GDBRemoteCommunication::AppendBytesToCache (const uint8_t *src, size_t src_len, bool broadcast, |
| ConnectionStatus status) |
| { |
| // Put the packet data into the buffer in a thread safe fashion |
| Mutex::Locker locker(m_bytes_mutex); |
| m_bytes.append ((const char *)src, src_len); |
| |
| // Parse up the packets into gdb remote packets |
| while (!m_bytes.empty()) |
| { |
| // end_idx must be one past the last valid packet byte. Start |
| // it off with an invalid value that is the same as the current |
| // index. |
| size_t end_idx = 0; |
| |
| switch (m_bytes[0]) |
| { |
| case '+': // Look for ack |
| case '-': // Look for cancel |
| case '\x03': // ^C to halt target |
| end_idx = 1; // The command is one byte long... |
| break; |
| |
| case '$': |
| // Look for a standard gdb packet? |
| end_idx = m_bytes.find('#'); |
| if (end_idx != std::string::npos) |
| { |
| if (end_idx + 2 < m_bytes.size()) |
| { |
| end_idx += 3; |
| } |
| else |
| { |
| // Checksum bytes aren't all here yet |
| end_idx = std::string::npos; |
| } |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (end_idx == std::string::npos) |
| { |
| //ProcessGDBRemoteLog::LogIf (GDBR_LOG_PACKETS | GDBR_LOG_VERBOSE, "GDBRemoteCommunication::%s packet not yet complete: '%s'",__FUNCTION__, m_bytes.c_str()); |
| return; |
| } |
| else if (end_idx > 0) |
| { |
| // We have a valid packet... |
| assert (end_idx <= m_bytes.size()); |
| std::auto_ptr<EventDataBytes> event_bytes_ap (new EventDataBytes (&m_bytes[0], end_idx)); |
| ProcessGDBRemoteLog::LogIf (GDBR_LOG_COMM, "got full packet: %s", event_bytes_ap->GetBytes()); |
| BroadcastEvent (eBroadcastBitPacketAvailable, event_bytes_ap.release()); |
| m_bytes.erase(0, end_idx); |
| } |
| else |
| { |
| assert (1 <= m_bytes.size()); |
| ProcessGDBRemoteLog::LogIf (GDBR_LOG_COMM, "GDBRemoteCommunication::%s tossing junk byte at %c",__FUNCTION__, m_bytes[0]); |
| m_bytes.erase(0, 1); |
| } |
| } |
| } |
| |
| lldb::pid_t |
| GDBRemoteCommunication::GetCurrentProcessID (uint32_t timeout_seconds) |
| { |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse("qC", strlen("qC"), response, timeout_seconds, false)) |
| { |
| if (response.GetChar() == 'Q') |
| if (response.GetChar() == 'C') |
| return response.GetHexMaxU32 (false, LLDB_INVALID_PROCESS_ID); |
| } |
| return LLDB_INVALID_PROCESS_ID; |
| } |
| |
| bool |
| GDBRemoteCommunication::GetLaunchSuccess (uint32_t timeout_seconds, std::string &error_str) |
| { |
| error_str.clear(); |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse("qLaunchSuccess", strlen("qLaunchSuccess"), response, timeout_seconds, false)) |
| { |
| if (response.IsOKPacket()) |
| return true; |
| if (response.GetChar() == 'E') |
| { |
| // A string the describes what failed when launching... |
| error_str = response.GetStringRef().substr(1); |
| } |
| else |
| { |
| error_str.assign ("unknown error occurred launching process"); |
| } |
| } |
| else |
| { |
| error_str.assign ("failed to send the qLaunchSuccess packet"); |
| } |
| return false; |
| } |
| |
| int |
| GDBRemoteCommunication::SendArgumentsPacket (char const *argv[], uint32_t timeout_seconds) |
| { |
| if (argv && argv[0]) |
| { |
| StreamString packet; |
| packet.PutChar('A'); |
| const char *arg; |
| for (uint32_t i = 0; (arg = argv[i]) != NULL; ++i) |
| { |
| const int arg_len = strlen(arg); |
| if (i > 0) |
| packet.PutChar(','); |
| packet.Printf("%i,%i,", arg_len * 2, i); |
| packet.PutBytesAsRawHex8 (arg, arg_len); |
| } |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, timeout_seconds, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| } |
| return -1; |
| } |
| |
| int |
| GDBRemoteCommunication::SendEnvironmentPacket (char const *name_equal_value, uint32_t timeout_seconds) |
| { |
| if (name_equal_value && name_equal_value[0]) |
| { |
| StreamString packet; |
| packet.Printf("QEnvironment:%s", name_equal_value); |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, timeout_seconds, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| } |
| return -1; |
| } |
| |
| bool |
| GDBRemoteCommunication::GetHostInfo () |
| { |
| if (m_supports_qHostInfo == eLazyBoolCalculate) |
| { |
| m_supports_qHostInfo = eLazyBoolNo; |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse ("qHostInfo", response, 1, false)) |
| { |
| if (response.IsUnsupportedPacket()) |
| return false; |
| |
| m_supports_qHostInfo = eLazyBoolYes; |
| |
| std::string name; |
| std::string value; |
| uint32_t cpu = LLDB_INVALID_CPUTYPE; |
| uint32_t sub = 0; |
| |
| while (response.GetNameColonValue(name, value)) |
| { |
| if (name.compare("cputype") == 0) |
| { |
| // exception type in big endian hex |
| cpu = Args::StringToUInt32 (value.c_str(), LLDB_INVALID_CPUTYPE, 0); |
| } |
| else if (name.compare("cpusubtype") == 0) |
| { |
| // exception count in big endian hex |
| sub = Args::StringToUInt32 (value.c_str(), 0, 0); |
| } |
| else if (name.compare("ostype") == 0) |
| { |
| // exception data in big endian hex |
| m_os.SetCString(value.c_str()); |
| } |
| else if (name.compare("vendor") == 0) |
| { |
| m_vendor.SetCString(value.c_str()); |
| } |
| else if (name.compare("endian") == 0) |
| { |
| if (value.compare("little") == 0) |
| m_byte_order = eByteOrderLittle; |
| else if (value.compare("big") == 0) |
| m_byte_order = eByteOrderBig; |
| else if (value.compare("pdp") == 0) |
| m_byte_order = eByteOrderPDP; |
| } |
| else if (name.compare("ptrsize") == 0) |
| { |
| m_pointer_byte_size = Args::StringToUInt32 (value.c_str(), 0, 0); |
| } |
| } |
| |
| if (cpu != LLDB_INVALID_CPUTYPE) |
| m_arch.SetArchitecture (lldb::eArchTypeMachO, cpu, sub); |
| } |
| } |
| return m_supports_qHostInfo == eLazyBoolYes; |
| } |
| |
| int |
| GDBRemoteCommunication::SendAttach |
| ( |
| lldb::pid_t pid, |
| uint32_t timeout_seconds, |
| StringExtractorGDBRemote& response |
| ) |
| { |
| if (pid != LLDB_INVALID_PROCESS_ID) |
| { |
| StreamString packet; |
| packet.Printf("vAttach;%x", pid); |
| |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, timeout_seconds, false)) |
| { |
| if (response.IsErrorPacket()) |
| return response.GetError(); |
| return 0; |
| } |
| } |
| return -1; |
| } |
| |
| const lldb_private::ArchSpec & |
| GDBRemoteCommunication::GetHostArchitecture () |
| { |
| if (!HostInfoIsValid ()) |
| GetHostInfo (); |
| return m_arch; |
| } |
| |
| const lldb_private::ConstString & |
| GDBRemoteCommunication::GetOSString () |
| { |
| if (!HostInfoIsValid ()) |
| GetHostInfo (); |
| return m_os; |
| } |
| |
| const lldb_private::ConstString & |
| GDBRemoteCommunication::GetVendorString() |
| { |
| if (!HostInfoIsValid ()) |
| GetHostInfo (); |
| return m_vendor; |
| } |
| |
| lldb::ByteOrder |
| GDBRemoteCommunication::GetByteOrder () |
| { |
| if (!HostInfoIsValid ()) |
| GetHostInfo (); |
| return m_byte_order; |
| } |
| |
| uint32_t |
| GDBRemoteCommunication::GetAddressByteSize () |
| { |
| if (!HostInfoIsValid ()) |
| GetHostInfo (); |
| return m_pointer_byte_size; |
| } |
| |
| addr_t |
| GDBRemoteCommunication::AllocateMemory (size_t size, uint32_t permissions, uint32_t timeout_seconds) |
| { |
| char packet[64]; |
| ::snprintf (packet, sizeof(packet), "_M%zx,%s%s%s", size, |
| permissions & lldb::ePermissionsReadable ? "r" : "", |
| permissions & lldb::ePermissionsWritable ? "w" : "", |
| permissions & lldb::ePermissionsExecutable ? "x" : ""); |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet, response, timeout_seconds, false)) |
| { |
| if (!response.IsErrorPacket()) |
| return response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS); |
| } |
| return LLDB_INVALID_ADDRESS; |
| } |
| |
| bool |
| GDBRemoteCommunication::DeallocateMemory (addr_t addr, uint32_t timeout_seconds) |
| { |
| char packet[64]; |
| snprintf(packet, sizeof(packet), "_m%llx", (uint64_t)addr); |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet, response, timeout_seconds, false)) |
| { |
| if (response.IsOKPacket()) |
| return true; |
| } |
| return false; |
| } |
| |
| int |
| GDBRemoteCommunication::SetSTDIN (char const *path) |
| { |
| if (path && path[0]) |
| { |
| StreamString packet; |
| packet.PutCString("QSetSTDIN:"); |
| packet.PutBytesAsRawHex8(path, strlen(path)); |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| } |
| return -1; |
| } |
| |
| int |
| GDBRemoteCommunication::SetSTDOUT (char const *path) |
| { |
| if (path && path[0]) |
| { |
| StreamString packet; |
| packet.PutCString("QSetSTDOUT:"); |
| packet.PutBytesAsRawHex8(path, strlen(path)); |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| } |
| return -1; |
| } |
| |
| int |
| GDBRemoteCommunication::SetSTDERR (char const *path) |
| { |
| if (path && path[0]) |
| { |
| StreamString packet; |
| packet.PutCString("QSetSTDERR:"); |
| packet.PutBytesAsRawHex8(path, strlen(path)); |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| } |
| return -1; |
| } |
| |
| int |
| GDBRemoteCommunication::SetWorkingDir (char const *path) |
| { |
| if (path && path[0]) |
| { |
| StreamString packet; |
| packet.PutCString("QSetWorkingDir:"); |
| packet.PutBytesAsRawHex8(path, strlen(path)); |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| } |
| return -1; |
| } |
| |
| int |
| GDBRemoteCommunication::SetDisableASLR (bool enable) |
| { |
| StreamString packet; |
| packet.Printf("QSetDisableASLR:%i", enable ? 1 : 0); |
| |
| StringExtractorGDBRemote response; |
| if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, 1, false)) |
| { |
| if (response.IsOKPacket()) |
| return 0; |
| uint8_t error = response.GetError(); |
| if (error) |
| return error; |
| } |
| return -1; |
| } |
