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@ -6,8 +6,7 @@ |
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#include <optional>
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#include <thread>
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#include <boost/asio.hpp>
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#include <boost/process/async_pipe.hpp>
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#include <boost/algorithm/string.hpp>
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#include "common/hex_util.h"
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#include "common/logging/log.h"
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@ -114,6 +113,11 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction |
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return; |
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} |
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if (packet.starts_with("vCont")) { |
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HandleVCont(packet.substr(5), actions); |
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return; |
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} |
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std::string_view command{packet.substr(1, packet.size())}; |
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switch (packet[0]) { |
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@ -122,6 +126,8 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction |
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s64 thread_id{strtoll(command.data() + 1, nullptr, 16)}; |
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if (thread_id >= 1) { |
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thread = GetThreadByID(thread_id); |
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} else { |
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thread = backend.GetActiveThread(); |
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} |
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if (thread) { |
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@ -141,6 +147,7 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction |
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} |
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break; |
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} |
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case 'Q': |
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case 'q': |
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HandleQuery(command); |
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break; |
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@ -204,7 +211,7 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction |
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break; |
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} |
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case 's': |
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actions.push_back(DebuggerAction::StepThread); |
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actions.push_back(DebuggerAction::StepThreadLocked); |
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break; |
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case 'C': |
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case 'c': |
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@ -248,12 +255,47 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction |
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} |
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} |
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static std::string_view GetThreadWaitReason(const Kernel::KThread* thread) { |
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switch (thread->GetWaitReasonForDebugging()) { |
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case Kernel::ThreadWaitReasonForDebugging::Sleep: |
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return "Sleep"; |
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case Kernel::ThreadWaitReasonForDebugging::IPC: |
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return "IPC"; |
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case Kernel::ThreadWaitReasonForDebugging::Synchronization: |
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return "Synchronization"; |
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case Kernel::ThreadWaitReasonForDebugging::ConditionVar: |
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return "ConditionVar"; |
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case Kernel::ThreadWaitReasonForDebugging::Arbitration: |
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return "Arbitration"; |
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case Kernel::ThreadWaitReasonForDebugging::Suspended: |
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return "Suspended"; |
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default: |
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return "Unknown"; |
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} |
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} |
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static std::string GetThreadState(const Kernel::KThread* thread) { |
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switch (thread->GetState()) { |
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case Kernel::ThreadState::Initialized: |
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return "Initialized"; |
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case Kernel::ThreadState::Waiting: |
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return fmt::format("Waiting ({})", GetThreadWaitReason(thread)); |
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case Kernel::ThreadState::Runnable: |
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return "Runnable"; |
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case Kernel::ThreadState::Terminated: |
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return "Terminated"; |
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default: |
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return "Unknown"; |
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} |
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} |
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void GDBStub::HandleQuery(std::string_view command) { |
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if (command.starts_with("TStatus")) { |
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// no tracepoint support
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SendReply("T0"); |
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} else if (command.starts_with("Supported")) { |
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SendReply("PacketSize=4000;qXfer:features:read+;qXfer:threads:read+;qXfer:libraries:read+"); |
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SendReply("PacketSize=4000;qXfer:features:read+;qXfer:threads:read+;qXfer:libraries:read+;" |
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"vContSupported+;QStartNoAckMode+"); |
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} else if (command.starts_with("Xfer:features:read:target.xml:")) { |
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const auto offset{command.substr(30)}; |
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const auto amount{command.substr(command.find(',') + 1)}; |
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@ -297,18 +339,57 @@ void GDBStub::HandleQuery(std::string_view command) { |
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const auto& threads = system.GlobalSchedulerContext().GetThreadList(); |
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for (const auto& thread : threads) { |
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buffer += |
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fmt::format(R"(<thread id="{:x}" core="{:d}" name="Thread {:d}"/>)", |
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thread->GetThreadID(), thread->GetActiveCore(), thread->GetThreadID()); |
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buffer += fmt::format(R"(<thread id="{:x}" core="{:d}" name="Thread {:d}">{}</thread>)", |
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thread->GetThreadID(), thread->GetActiveCore(), |
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thread->GetThreadID(), GetThreadState(thread)); |
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} |
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buffer += "</threads>"; |
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SendReply(buffer); |
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} else if (command.starts_with("Attached")) { |
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SendReply("0"); |
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} else if (command.starts_with("StartNoAckMode")) { |
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no_ack = true; |
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SendReply(GDB_STUB_REPLY_OK); |
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} else { |
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SendReply(GDB_STUB_REPLY_EMPTY); |
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} |
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} |
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void GDBStub::HandleVCont(std::string_view command, std::vector<DebuggerAction>& actions) { |
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if (command == "?") { |
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// Continuing and stepping are supported
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// (signal is ignored, but required for GDB to use vCont)
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SendReply("vCont;c;C;s;S"); |
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return; |
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} |
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Kernel::KThread* stepped_thread{nullptr}; |
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bool lock_execution{true}; |
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std::vector<std::string> entries; |
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boost::split(entries, command.substr(1), boost::is_any_of(";")); |
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for (const auto& thread_action : entries) { |
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std::vector<std::string> parts; |
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boost::split(parts, thread_action, boost::is_any_of(":")); |
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if (parts.size() == 1 && (parts[0] == "c" || parts[0].starts_with("C"))) { |
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lock_execution = false; |
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} |
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if (parts.size() == 2 && (parts[0] == "s" || parts[0].starts_with("S"))) { |
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stepped_thread = GetThreadByID(strtoll(parts[1].data(), nullptr, 16)); |
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} |
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} |
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if (stepped_thread) { |
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backend.SetActiveThread(stepped_thread); |
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actions.push_back(lock_execution ? DebuggerAction::StepThreadLocked |
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: DebuggerAction::StepThreadUnlocked); |
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} else { |
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actions.push_back(DebuggerAction::Continue); |
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} |
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} |
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Kernel::KThread* GDBStub::GetThreadByID(u64 thread_id) { |
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const auto& threads{system.GlobalSchedulerContext().GetThreadList()}; |
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for (auto* thread : threads) { |
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@ -374,6 +455,10 @@ void GDBStub::SendReply(std::string_view data) { |
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} |
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void GDBStub::SendStatus(char status) { |
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if (no_ack) { |
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return; |
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} |
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std::array<u8, 1> buf = {static_cast<u8>(status)}; |
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LOG_TRACE(Debug_GDBStub, "Writing status: {}", status); |
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backend.WriteToClient(buf); |
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Liam
4 years ago