diff options
Diffstat (limited to 'lldb/source/Plugins/Process')
4 files changed, 106 insertions, 63 deletions
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp index f27573a2f9e..49cbeb023fd 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp @@ -113,6 +113,22 @@ GDBRemoteCommunicationServer::SendErrorResponse(const Status &error) { } GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServer::SendErrorResponse(llvm::Error error) { + std::unique_ptr<llvm::ErrorInfoBase> EIB; + std::unique_ptr<PacketUnimplementedError> PUE; + llvm::handleAllErrors( + std::move(error), + [&](std::unique_ptr<PacketUnimplementedError> E) { PUE = std::move(E); }, + [&](std::unique_ptr<llvm::ErrorInfoBase> E) { EIB = std::move(E); }); + + if (EIB) + return SendErrorResponse(Status(llvm::Error(std::move(EIB)))); + if (PUE) + return SendUnimplementedResponse(PUE->message().c_str()); + return SendErrorResponse(Status("Unknown Error")); +} + +GDBRemoteCommunication::PacketResult GDBRemoteCommunicationServer::Handle_QErrorStringEnable( StringExtractorGDBRemote &packet) { m_send_error_strings = true; @@ -138,3 +154,5 @@ GDBRemoteCommunicationServer::SendOKResponse() { bool GDBRemoteCommunicationServer::HandshakeWithClient() { return GetAck() == PacketResult::Success; } + +char PacketUnimplementedError::ID; diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h index f2b2d1ef815..86f0abf45e0 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.h @@ -15,6 +15,9 @@ #include "GDBRemoteCommunication.h" #include "lldb/lldb-private-forward.h" +#include "llvm/Support/Errc.h" +#include "llvm/Support/Error.h" + class StringExtractorGDBRemote; namespace lldb_private { @@ -59,6 +62,8 @@ protected: PacketResult SendErrorResponse(const Status &error); + PacketResult SendErrorResponse(llvm::Error error); + PacketResult SendUnimplementedResponse(const char *packet); PacketResult SendErrorResponse(uint8_t error); @@ -72,6 +77,18 @@ private: DISALLOW_COPY_AND_ASSIGN(GDBRemoteCommunicationServer); }; +class PacketUnimplementedError + : public llvm::ErrorInfo<PacketUnimplementedError, llvm::StringError> { +public: + static char ID; + using llvm::ErrorInfo<PacketUnimplementedError, + llvm::StringError>::ErrorInfo; // inherit constructors + PacketUnimplementedError(const llvm::Twine &S) + : ErrorInfo(S, llvm::errc::not_supported) {} + + PacketUnimplementedError() : ErrorInfo(llvm::errc::not_supported) {} +}; + } // namespace process_gdb_remote } // namespace lldb_private diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp index 2778b124334..196607665bb 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp @@ -144,8 +144,8 @@ void GDBRemoteCommunicationServerLLGS::RegisterPacketHandlers() { StringExtractorGDBRemote::eServerPacketType_qWatchpointSupportInfo, &GDBRemoteCommunicationServerLLGS::Handle_qWatchpointSupportInfo); RegisterMemberFunctionHandler( - StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read, - &GDBRemoteCommunicationServerLLGS::Handle_qXfer_auxv_read); + StringExtractorGDBRemote::eServerPacketType_qXfer, + &GDBRemoteCommunicationServerLLGS::Handle_qXfer); RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_s, &GDBRemoteCommunicationServerLLGS::Handle_s); RegisterMemberFunctionHandler( @@ -2747,94 +2747,99 @@ GDBRemoteCommunicationServerLLGS::Handle_s(StringExtractorGDBRemote &packet) { return PacketResult::Success; } -GDBRemoteCommunication::PacketResult -GDBRemoteCommunicationServerLLGS::Handle_qXfer_auxv_read( - StringExtractorGDBRemote &packet) { -// *BSD impls should be able to do this too. -#if defined(__linux__) || defined(__NetBSD__) - 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_up) { +llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>> +GDBRemoteCommunicationServerLLGS::ReadXferObject(llvm::StringRef object, + llvm::StringRef annex) { + if (object == "auxv") { // Make sure we have a valid process. if (!m_debugged_process_up || (m_debugged_process_up->GetID() == LLDB_INVALID_PROCESS_ID)) { - if (log) - log->Printf( - "GDBRemoteCommunicationServerLLGS::%s failed, no process available", - __FUNCTION__); - return SendErrorResponse(0x10); + return llvm::createStringError(llvm::inconvertibleErrorCode(), + "No process available"); } // Grab the auxv data. auto buffer_or_error = m_debugged_process_up->GetAuxvData(); - if (!buffer_or_error) { - std::error_code ec = buffer_or_error.getError(); - LLDB_LOG(log, "no auxv data retrieved: {0}", ec.message()); - return SendErrorResponse(ec.value()); - } - m_active_auxv_buffer_up = std::move(*buffer_or_error); + if (!buffer_or_error) + return llvm::errorCodeToError(buffer_or_error.getError()); + return std::move(*buffer_or_error); } + return llvm::make_error<PacketUnimplementedError>( + "Xfer object not supported"); +} + +GDBRemoteCommunication::PacketResult +GDBRemoteCommunicationServerLLGS::Handle_qXfer( + StringExtractorGDBRemote &packet) { + SmallVector<StringRef, 5> fields; + // The packet format is "qXfer:<object>:<action>:<annex>:offset,length" + StringRef(packet.GetStringRef()).split(fields, ':', 4); + if (fields.size() != 5) + return SendIllFormedResponse(packet, "malformed qXfer packet"); + StringRef &xfer_object = fields[1]; + StringRef &xfer_action = fields[2]; + StringRef &xfer_annex = fields[3]; + StringExtractor offset_data(fields[4]); + if (xfer_action != "read") + return SendUnimplementedResponse("qXfer action not supported"); + // Parse offset. + const uint64_t xfer_offset = + offset_data.GetHexMaxU64(false, std::numeric_limits<uint64_t>::max()); + if (xfer_offset == std::numeric_limits<uint64_t>::max()) + return SendIllFormedResponse(packet, "qXfer packet missing offset"); + // Parse out comma. + if (offset_data.GetChar() != ',') + return SendIllFormedResponse(packet, + "qXfer packet missing comma after offset"); + // Parse out the length. + const uint64_t xfer_length = + offset_data.GetHexMaxU64(false, std::numeric_limits<uint64_t>::max()); + if (xfer_length == std::numeric_limits<uint64_t>::max()) + return SendIllFormedResponse(packet, "qXfer packet missing length"); + + // Get a previously constructed buffer if it exists or create it now. + std::string buffer_key = (xfer_object + xfer_action + xfer_annex).str(); + auto buffer_it = m_xfer_buffer_map.find(buffer_key); + if (buffer_it == m_xfer_buffer_map.end()) { + auto buffer_up = ReadXferObject(xfer_object, xfer_annex); + if (!buffer_up) + return SendErrorResponse(buffer_up.takeError()); + buffer_it = m_xfer_buffer_map + .insert(std::make_pair(buffer_key, std::move(*buffer_up))) + .first; + } + + // Send back the response StreamGDBRemote response; bool done_with_buffer = false; - - llvm::StringRef buffer = m_active_auxv_buffer_up->getBuffer(); - if (auxv_offset >= buffer.size()) { + llvm::StringRef buffer = buffer_it->second->getBuffer(); + if (xfer_offset >= buffer.size()) { // 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. - buffer = buffer.drop_front(auxv_offset); - + buffer = buffer.drop_front(xfer_offset); // Mark the response type according to whether we're reading the remainder - // of the auxv data. - if (auxv_length >= buffer.size()) { + // of the data. + if (xfer_length >= buffer.size()) { // 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'); - buffer = buffer.take_front(auxv_length); + buffer = buffer.take_front(xfer_length); } - // Now write the data in encoded binary form. response.PutEscapedBytes(buffer.data(), buffer.size()); } if (done_with_buffer) - m_active_auxv_buffer_up.reset(); + m_xfer_buffer_map.erase(buffer_it); return SendPacketNoLock(response.GetString()); -#else - return SendUnimplementedResponse("not implemented on this platform"); -#endif } GDBRemoteCommunication::PacketResult @@ -3259,8 +3264,8 @@ uint32_t GDBRemoteCommunicationServerLLGS::GetNextSavedRegistersID() { void GDBRemoteCommunicationServerLLGS::ClearProcessSpecificData() { Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); - LLDB_LOG(log, "clearing auxv buffer: {0}", m_active_auxv_buffer_up.get()); - m_active_auxv_buffer_up.reset(); + LLDB_LOG(log, "clearing {0} xfer buffers", m_xfer_buffer_map.size()); + m_xfer_buffer_map.clear(); } FileSpec diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h index 1f626c2ad76..068ea52caaa 100644 --- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h +++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h @@ -82,7 +82,7 @@ protected: MainLoop::ReadHandleUP m_stdio_handle_up; lldb::StateType m_inferior_prev_state = lldb::StateType::eStateInvalid; - std::unique_ptr<llvm::MemoryBuffer> m_active_auxv_buffer_up; + llvm::StringMap<std::unique_ptr<llvm::MemoryBuffer>> m_xfer_buffer_map; std::mutex m_saved_registers_mutex; std::unordered_map<uint32_t, lldb::DataBufferSP> m_saved_registers_map; uint32_t m_next_saved_registers_id = 1; @@ -150,7 +150,7 @@ protected: PacketResult Handle_s(StringExtractorGDBRemote &packet); - PacketResult Handle_qXfer_auxv_read(StringExtractorGDBRemote &packet); + PacketResult Handle_qXfer(StringExtractorGDBRemote &packet); PacketResult Handle_QSaveRegisterState(StringExtractorGDBRemote &packet); @@ -193,6 +193,9 @@ protected: FileSpec FindModuleFile(const std::string &module_path, const ArchSpec &arch) override; + llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>> + ReadXferObject(llvm::StringRef object, llvm::StringRef annex); + private: void HandleInferiorState_Exited(NativeProcessProtocol *process); |
