Duckstation/src/duckstation-qt/gdbconnection.cpp

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2020-12-17 17:32:29 +00:00
#include "gdbconnection.h"
#include "qthostinterface.h"
#include "common/log.h"
#include "core/gdb_protocol.h"
Log_SetChannel(GDBConnection);
GDBConnection::GDBConnection(QObject *parent, int descriptor)
: QThread(parent), m_descriptor(descriptor)
{
Log_InfoPrintf("(%u) Accepted new connection on GDB server", m_descriptor);
connect(&m_socket, &QTcpSocket::readyRead, this, &GDBConnection::receivedData);
connect(&m_socket, &QTcpSocket::disconnected, this, &GDBConnection::gotDisconnected);
if (m_socket.setSocketDescriptor(m_descriptor)) {
QtHostInterface::GetInstance()->pauseSystem(true, true);
}
else {
Log_ErrorPrintf("(%u) Failed to set socket descriptor: %s", m_descriptor, m_socket.errorString().toUtf8().constData());
}
}
void GDBConnection::gotDisconnected()
{
Log_InfoPrintf("(%u) Client disconnected", m_descriptor);
this->exit(0);
}
void GDBConnection::receivedData()
{
qint64 bytesRead;
char buffer[256];
while ((bytesRead = m_socket.read(buffer, sizeof(buffer))) > 0) {
for (char c : std::string_view(buffer, bytesRead)) {
m_readBuffer.push_back(c);
if (GDBProtocol::IsPacketInterrupt(m_readBuffer)) {
Log_DebugPrintf("(%u) > Interrupt request", m_descriptor);
QtHostInterface::GetInstance()->pauseSystem(true, true);
m_readBuffer.erase();
}
else if (GDBProtocol::IsPacketContinue(m_readBuffer)) {
Log_DebugPrintf("(%u) > Continue request", m_descriptor);
QtHostInterface::GetInstance()->pauseSystem(false, false);
m_readBuffer.erase();
}
else if (GDBProtocol::IsPacketComplete(m_readBuffer)) {
Log_DebugPrintf("(%u) > %s", m_descriptor, m_readBuffer.c_str());
writePacket(GDBProtocol::ProcessPacket(m_readBuffer));
m_readBuffer.erase();
}
}
}
if (bytesRead == -1) {
Log_ErrorPrintf("(%u) Failed to read from socket: %s", m_descriptor, m_socket.errorString().toUtf8().constData());
}
}
void GDBConnection::onEmulationPaused(bool paused)
{
if (paused) {
if (m_seen_resume) {
m_seen_resume = false;
// Generate a stop reply packet, insert '?' command to generate it.
writePacket(GDBProtocol::ProcessPacket("$?#3f"));
}
}
else {
m_seen_resume = true;
// Send ack, in case GDB sent a continue request.
writePacket("+");
}
}
void GDBConnection::writePacket(std::string_view packet)
{
Log_DebugPrintf("(%u) < %*s", m_descriptor, packet.length(), packet.data());
if (m_socket.write(packet.data(), packet.length()) == -1) {
Log_ErrorPrintf("(%u) Failed to write to socket: %s", m_descriptor, m_socket.errorString().toUtf8().constData());
}
}