diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp index 6dcc73c3e43d..16a27af700c6 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp @@ -82,6 +82,8 @@ bool GDBRemoteCommunicationClient::HandshakeWithServer(Status *error_ptr) { // Start the read thread after we send the handshake ack since if we fail to // send the handshake ack, there is no reason to continue... + std::chrono::steady_clock::time_point start_of_handshake = + std::chrono::steady_clock::now(); if (SendAck()) { // Wait for any responses that might have been queued up in the remote // GDB server and flush them all @@ -97,8 +99,24 @@ bool GDBRemoteCommunicationClient::HandshakeWithServer(Status *error_ptr) { if (QueryNoAckModeSupported()) { return true; } else { - if (error_ptr) - error_ptr->SetErrorString("failed to get reply to handshake packet"); + std::chrono::steady_clock::time_point end_of_handshake = + std::chrono::steady_clock::now(); + auto handshake_timeout = + std::chrono::duration(end_of_handshake - start_of_handshake) + .count(); + if (error_ptr) { + if (packet_result == PacketResult::ErrorDisconnected) + error_ptr->SetErrorString("Connection shut down by remote side " + "while waiting for reply to initial " + "handshake packet"); + else if (packet_result == PacketResult::ErrorReplyTimeout) + error_ptr->SetErrorStringWithFormat( + "failed to get reply to handshake packet within timeout of " + "%.1f seconds", + handshake_timeout); + else + error_ptr->SetErrorString("failed to get reply to handshake packet"); + } } } else { if (error_ptr)