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Diffstat (limited to 'contrib/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h')
| -rw-r--r-- | contrib/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h | 602 |
1 files changed, 602 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h b/contrib/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h new file mode 100644 index 000000000000..de85c9f8b67b --- /dev/null +++ b/contrib/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h @@ -0,0 +1,602 @@ +//===-- GDBRemoteCommunicationClient.h --------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef liblldb_GDBRemoteCommunicationClient_h_ +#define liblldb_GDBRemoteCommunicationClient_h_ + +#include "GDBRemoteClientBase.h" + +#include <chrono> +#include <map> +#include <mutex> +#include <string> +#include <vector> + +#include "lldb/Utility/ArchSpec.h" +#include "lldb/Utility/StreamGDBRemote.h" +#include "lldb/Utility/StructuredData.h" +#if defined(_WIN32) +#include "lldb/Host/windows/PosixApi.h" +#endif + +#include "llvm/ADT/Optional.h" +#include "llvm/Support/VersionTuple.h" + +namespace lldb_private { +namespace process_gdb_remote { + +class GDBRemoteCommunicationClient : public GDBRemoteClientBase { +public: + GDBRemoteCommunicationClient(); + + ~GDBRemoteCommunicationClient() override; + + // After connecting, send the handshake to the server to make sure + // we are communicating with it. + bool HandshakeWithServer(Status *error_ptr); + + // For packets which specify a range of output to be returned, + // return all of the output via a series of request packets of the form + // <prefix>0,<size> + // <prefix><size>,<size> + // <prefix><size>*2,<size> + // <prefix><size>*3,<size> + // ... + // until a "$l..." packet is received, indicating the end. + // (size is in hex; this format is used by a standard gdbserver to + // return the given portion of the output specified by <prefix>; + // for example, "qXfer:libraries-svr4:read::fff,1000" means + // "return a chunk of the xml description file for shared + // library load addresses, where the chunk starts at offset 0xfff + // and continues for 0x1000 bytes"). + // Concatenate the resulting server response packets together and + // return in response_string. If any packet fails, the return value + // indicates that failure and the returned string value is undefined. + PacketResult + SendPacketsAndConcatenateResponses(const char *send_payload_prefix, + std::string &response_string); + + bool GetThreadSuffixSupported(); + + // This packet is usually sent first and the boolean return value + // indicates if the packet was send and any response was received + // even in the response is UNIMPLEMENTED. If the packet failed to + // get a response, then false is returned. This quickly tells us + // if we were able to connect and communicate with the remote GDB + // server + bool QueryNoAckModeSupported(); + + void GetListThreadsInStopReplySupported(); + + lldb::pid_t GetCurrentProcessID(bool allow_lazy = true); + + bool GetLaunchSuccess(std::string &error_str); + + bool LaunchGDBServer(const char *remote_accept_hostname, lldb::pid_t &pid, + uint16_t &port, std::string &socket_name); + + size_t QueryGDBServer( + std::vector<std::pair<uint16_t, std::string>> &connection_urls); + + bool KillSpawnedProcess(lldb::pid_t pid); + + /// Sends a GDB remote protocol 'A' packet that delivers program + /// arguments to the remote server. + /// + /// \param[in] argv + /// A NULL terminated array of const C strings to use as the + /// arguments. + /// + /// \return + /// Zero if the response was "OK", a positive value if the + /// the response was "Exx" where xx are two hex digits, or + /// -1 if the call is unsupported or any other unexpected + /// response was received. + int SendArgumentsPacket(const ProcessLaunchInfo &launch_info); + + /// Sends a "QEnvironment:NAME=VALUE" packet that will build up the + /// environment that will get used when launching an application + /// in conjunction with the 'A' packet. This function can be called + /// multiple times in a row in order to pass on the desired + /// environment that the inferior should be launched with. + /// + /// \param[in] name_equal_value + /// A NULL terminated C string that contains a single environment + /// in the format "NAME=VALUE". + /// + /// \return + /// Zero if the response was "OK", a positive value if the + /// the response was "Exx" where xx are two hex digits, or + /// -1 if the call is unsupported or any other unexpected + /// response was received. + int SendEnvironmentPacket(char const *name_equal_value); + int SendEnvironment(const Environment &env); + + int SendLaunchArchPacket(const char *arch); + + int SendLaunchEventDataPacket(const char *data, + bool *was_supported = nullptr); + + /// Sends a "vAttach:PID" where PID is in hex. + /// + /// \param[in] pid + /// A process ID for the remote gdb server to attach to. + /// + /// \param[out] response + /// The response received from the gdb server. If the return + /// value is zero, \a response will contain a stop reply + /// packet. + /// + /// \return + /// Zero if the attach was successful, or an error indicating + /// an error code. + int SendAttach(lldb::pid_t pid, StringExtractorGDBRemote &response); + + /// Sends a GDB remote protocol 'I' packet that delivers stdin + /// data to the remote process. + /// + /// \param[in] data + /// A pointer to stdin data. + /// + /// \param[in] data_len + /// The number of bytes available at \a data. + /// + /// \return + /// Zero if the attach was successful, or an error indicating + /// an error code. + int SendStdinNotification(const char *data, size_t data_len); + + /// Sets the path to use for stdin/out/err for a process + /// that will be launched with the 'A' packet. + /// + /// \param[in] path + /// The path to use for stdin/out/err + /// + /// \return + /// Zero if the for success, or an error code for failure. + int SetSTDIN(const FileSpec &file_spec); + int SetSTDOUT(const FileSpec &file_spec); + int SetSTDERR(const FileSpec &file_spec); + + /// Sets the disable ASLR flag to \a enable for a process that will + /// be launched with the 'A' packet. + /// + /// \param[in] enable + /// A boolean value indicating whether to disable ASLR or not. + /// + /// \return + /// Zero if the for success, or an error code for failure. + int SetDisableASLR(bool enable); + + /// Sets the DetachOnError flag to \a enable for the process controlled by the + /// stub. + /// + /// \param[in] enable + /// A boolean value indicating whether to detach on error or not. + /// + /// \return + /// Zero if the for success, or an error code for failure. + int SetDetachOnError(bool enable); + + /// Sets the working directory to \a path for a process that will + /// be launched with the 'A' packet for non platform based + /// connections. If this packet is sent to a GDB server that + /// implements the platform, it will change the current working + /// directory for the platform process. + /// + /// \param[in] working_dir + /// The path to a directory to use when launching our process + /// + /// \return + /// Zero if the for success, or an error code for failure. + int SetWorkingDir(const FileSpec &working_dir); + + /// Gets the current working directory of a remote platform GDB + /// server. + /// + /// \param[out] working_dir + /// The current working directory on the remote platform. + /// + /// \return + /// Boolean for success + bool GetWorkingDir(FileSpec &working_dir); + + lldb::addr_t AllocateMemory(size_t size, uint32_t permissions); + + bool DeallocateMemory(lldb::addr_t addr); + + Status Detach(bool keep_stopped); + + Status GetMemoryRegionInfo(lldb::addr_t addr, MemoryRegionInfo &range_info); + + Status GetWatchpointSupportInfo(uint32_t &num); + + Status GetWatchpointSupportInfo(uint32_t &num, bool &after, + const ArchSpec &arch); + + Status GetWatchpointsTriggerAfterInstruction(bool &after, + const ArchSpec &arch); + + const ArchSpec &GetHostArchitecture(); + + std::chrono::seconds GetHostDefaultPacketTimeout(); + + const ArchSpec &GetProcessArchitecture(); + + void GetRemoteQSupported(); + + bool GetVContSupported(char flavor); + + bool GetpPacketSupported(lldb::tid_t tid); + + bool GetxPacketSupported(); + + bool GetVAttachOrWaitSupported(); + + bool GetSyncThreadStateSupported(); + + void ResetDiscoverableSettings(bool did_exec); + + bool GetHostInfo(bool force = false); + + bool GetDefaultThreadId(lldb::tid_t &tid); + + llvm::VersionTuple GetOSVersion(); + + bool GetOSBuildString(std::string &s); + + bool GetOSKernelDescription(std::string &s); + + ArchSpec GetSystemArchitecture(); + + bool GetHostname(std::string &s); + + lldb::addr_t GetShlibInfoAddr(); + + bool GetSupportsThreadSuffix(); + + bool GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info); + + uint32_t FindProcesses(const ProcessInstanceInfoMatch &process_match_info, + ProcessInstanceInfoList &process_infos); + + bool GetUserName(uint32_t uid, std::string &name); + + bool GetGroupName(uint32_t gid, std::string &name); + + bool HasFullVContSupport() { return GetVContSupported('A'); } + + bool HasAnyVContSupport() { return GetVContSupported('a'); } + + bool GetStopReply(StringExtractorGDBRemote &response); + + bool GetThreadStopInfo(lldb::tid_t tid, StringExtractorGDBRemote &response); + + bool SupportsGDBStoppointPacket(GDBStoppointType type) { + switch (type) { + case eBreakpointSoftware: + return m_supports_z0; + case eBreakpointHardware: + return m_supports_z1; + case eWatchpointWrite: + return m_supports_z2; + case eWatchpointRead: + return m_supports_z3; + case eWatchpointReadWrite: + return m_supports_z4; + default: + return false; + } + } + + uint8_t SendGDBStoppointTypePacket( + GDBStoppointType type, // Type of breakpoint or watchpoint + bool insert, // Insert or remove? + lldb::addr_t addr, // Address of breakpoint or watchpoint + uint32_t length); // Byte Size of breakpoint or watchpoint + + bool SetNonStopMode(const bool enable); + + void TestPacketSpeed(const uint32_t num_packets, uint32_t max_send, + uint32_t max_recv, uint64_t recv_amount, bool json, + Stream &strm); + + // This packet is for testing the speed of the interface only. Both + // the client and server need to support it, but this allows us to + // measure the packet speed without any other work being done on the + // other end and avoids any of that work affecting the packet send + // and response times. + bool SendSpeedTestPacket(uint32_t send_size, uint32_t recv_size); + + bool SetCurrentThread(uint64_t tid); + + bool SetCurrentThreadForRun(uint64_t tid); + + bool GetQXferAuxvReadSupported(); + + void EnableErrorStringInPacket(); + + bool GetQXferLibrariesReadSupported(); + + bool GetQXferLibrariesSVR4ReadSupported(); + + uint64_t GetRemoteMaxPacketSize(); + + bool GetEchoSupported(); + + bool GetQPassSignalsSupported(); + + bool GetAugmentedLibrariesSVR4ReadSupported(); + + bool GetQXferFeaturesReadSupported(); + + bool GetQXferMemoryMapReadSupported(); + + LazyBool SupportsAllocDeallocMemory() // const + { + // Uncomment this to have lldb pretend the debug server doesn't respond to + // alloc/dealloc memory packets. + // m_supports_alloc_dealloc_memory = lldb_private::eLazyBoolNo; + return m_supports_alloc_dealloc_memory; + } + + size_t GetCurrentThreadIDs(std::vector<lldb::tid_t> &thread_ids, + bool &sequence_mutex_unavailable); + + lldb::user_id_t OpenFile(const FileSpec &file_spec, uint32_t flags, + mode_t mode, Status &error); + + bool CloseFile(lldb::user_id_t fd, Status &error); + + lldb::user_id_t GetFileSize(const FileSpec &file_spec); + + Status GetFilePermissions(const FileSpec &file_spec, + uint32_t &file_permissions); + + Status SetFilePermissions(const FileSpec &file_spec, + uint32_t file_permissions); + + uint64_t ReadFile(lldb::user_id_t fd, uint64_t offset, void *dst, + uint64_t dst_len, Status &error); + + uint64_t WriteFile(lldb::user_id_t fd, uint64_t offset, const void *src, + uint64_t src_len, Status &error); + + Status CreateSymlink(const FileSpec &src, const FileSpec &dst); + + Status Unlink(const FileSpec &file_spec); + + Status MakeDirectory(const FileSpec &file_spec, uint32_t mode); + + bool GetFileExists(const FileSpec &file_spec); + + Status RunShellCommand( + const char *command, // Shouldn't be nullptr + const FileSpec &working_dir, // Pass empty FileSpec to use the current + // working directory + int *status_ptr, // Pass nullptr if you don't want the process exit status + int *signo_ptr, // Pass nullptr if you don't want the signal that caused + // the process to exit + std::string + *command_output, // Pass nullptr if you don't want the command output + const Timeout<std::micro> &timeout); + + bool CalculateMD5(const FileSpec &file_spec, uint64_t &high, uint64_t &low); + + lldb::DataBufferSP ReadRegister( + lldb::tid_t tid, + uint32_t + reg_num); // Must be the eRegisterKindProcessPlugin register number + + lldb::DataBufferSP ReadAllRegisters(lldb::tid_t tid); + + bool + WriteRegister(lldb::tid_t tid, + uint32_t reg_num, // eRegisterKindProcessPlugin register number + llvm::ArrayRef<uint8_t> data); + + bool WriteAllRegisters(lldb::tid_t tid, llvm::ArrayRef<uint8_t> data); + + bool SaveRegisterState(lldb::tid_t tid, uint32_t &save_id); + + bool RestoreRegisterState(lldb::tid_t tid, uint32_t save_id); + + bool SyncThreadState(lldb::tid_t tid); + + const char *GetGDBServerProgramName(); + + uint32_t GetGDBServerProgramVersion(); + + bool AvoidGPackets(ProcessGDBRemote *process); + + StructuredData::ObjectSP GetThreadsInfo(); + + bool GetThreadExtendedInfoSupported(); + + bool GetLoadedDynamicLibrariesInfosSupported(); + + bool GetSharedCacheInfoSupported(); + + bool GetModuleInfo(const FileSpec &module_file_spec, + const ArchSpec &arch_spec, ModuleSpec &module_spec); + + llvm::Optional<std::vector<ModuleSpec>> + GetModulesInfo(llvm::ArrayRef<FileSpec> module_file_specs, + const llvm::Triple &triple); + + bool ReadExtFeature(const lldb_private::ConstString object, + const lldb_private::ConstString annex, std::string &out, + lldb_private::Status &err); + + void ServeSymbolLookups(lldb_private::Process *process); + + // Sends QPassSignals packet to the server with given signals to ignore. + Status SendSignalsToIgnore(llvm::ArrayRef<int32_t> signals); + + /// Return the feature set supported by the gdb-remote server. + /// + /// This method returns the remote side's response to the qSupported + /// packet. The response is the complete string payload returned + /// to the client. + /// + /// \return + /// The string returned by the server to the qSupported query. + const std::string &GetServerSupportedFeatures() const { + return m_qSupported_response; + } + + /// Return the array of async JSON packet types supported by the remote. + /// + /// This method returns the remote side's array of supported JSON + /// packet types as a list of type names. Each of the results are + /// expected to have an Enable{type_name} command to enable and configure + /// the related feature. Each type_name for an enabled feature will + /// possibly send async-style packets that contain a payload of a + /// binhex-encoded JSON dictionary. The dictionary will have a + /// string field named 'type', that contains the type_name of the + /// supported packet type. + /// + /// There is a Plugin category called structured-data plugins. + /// A plugin indicates whether it knows how to handle a type_name. + /// If so, it can be used to process the async JSON packet. + /// + /// \return + /// The string returned by the server to the qSupported query. + lldb_private::StructuredData::Array *GetSupportedStructuredDataPlugins(); + + /// Configure a StructuredData feature on the remote end. + /// + /// \see \b Process::ConfigureStructuredData(...) for details. + Status + ConfigureRemoteStructuredData(ConstString type_name, + const StructuredData::ObjectSP &config_sp); + + lldb::user_id_t SendStartTracePacket(const TraceOptions &options, + Status &error); + + Status SendStopTracePacket(lldb::user_id_t uid, lldb::tid_t thread_id); + + Status SendGetDataPacket(lldb::user_id_t uid, lldb::tid_t thread_id, + llvm::MutableArrayRef<uint8_t> &buffer, + size_t offset = 0); + + Status SendGetMetaDataPacket(lldb::user_id_t uid, lldb::tid_t thread_id, + llvm::MutableArrayRef<uint8_t> &buffer, + size_t offset = 0); + + Status SendGetTraceConfigPacket(lldb::user_id_t uid, TraceOptions &options); + +protected: + LazyBool m_supports_not_sending_acks; + LazyBool m_supports_thread_suffix; + LazyBool m_supports_threads_in_stop_reply; + LazyBool m_supports_vCont_all; + LazyBool m_supports_vCont_any; + LazyBool m_supports_vCont_c; + LazyBool m_supports_vCont_C; + LazyBool m_supports_vCont_s; + LazyBool m_supports_vCont_S; + LazyBool m_qHostInfo_is_valid; + LazyBool m_curr_pid_is_valid; + LazyBool m_qProcessInfo_is_valid; + LazyBool m_qGDBServerVersion_is_valid; + LazyBool m_supports_alloc_dealloc_memory; + LazyBool m_supports_memory_region_info; + LazyBool m_supports_watchpoint_support_info; + LazyBool m_supports_detach_stay_stopped; + LazyBool m_watchpoints_trigger_after_instruction; + LazyBool m_attach_or_wait_reply; + LazyBool m_prepare_for_reg_writing_reply; + LazyBool m_supports_p; + LazyBool m_supports_x; + LazyBool m_avoid_g_packets; + LazyBool m_supports_QSaveRegisterState; + LazyBool m_supports_qXfer_auxv_read; + LazyBool m_supports_qXfer_libraries_read; + LazyBool m_supports_qXfer_libraries_svr4_read; + LazyBool m_supports_qXfer_features_read; + LazyBool m_supports_qXfer_memory_map_read; + LazyBool m_supports_augmented_libraries_svr4_read; + LazyBool m_supports_jThreadExtendedInfo; + LazyBool m_supports_jLoadedDynamicLibrariesInfos; + LazyBool m_supports_jGetSharedCacheInfo; + LazyBool m_supports_QPassSignals; + LazyBool m_supports_error_string_reply; + + bool m_supports_qProcessInfoPID : 1, m_supports_qfProcessInfo : 1, + m_supports_qUserName : 1, m_supports_qGroupName : 1, + m_supports_qThreadStopInfo : 1, m_supports_z0 : 1, m_supports_z1 : 1, + m_supports_z2 : 1, m_supports_z3 : 1, m_supports_z4 : 1, + m_supports_QEnvironment : 1, m_supports_QEnvironmentHexEncoded : 1, + m_supports_qSymbol : 1, m_qSymbol_requests_done : 1, + m_supports_qModuleInfo : 1, m_supports_jThreadsInfo : 1, + m_supports_jModulesInfo : 1; + + lldb::pid_t m_curr_pid; + lldb::tid_t m_curr_tid; // Current gdb remote protocol thread index for all + // other operations + lldb::tid_t m_curr_tid_run; // Current gdb remote protocol thread index for + // continue, step, etc + + uint32_t m_num_supported_hardware_watchpoints; + + ArchSpec m_host_arch; + ArchSpec m_process_arch; + llvm::VersionTuple m_os_version; + std::string m_os_build; + std::string m_os_kernel; + std::string m_hostname; + std::string m_gdb_server_name; // from reply to qGDBServerVersion, empty if + // qGDBServerVersion is not supported + uint32_t m_gdb_server_version; // from reply to qGDBServerVersion, zero if + // qGDBServerVersion is not supported + std::chrono::seconds m_default_packet_timeout; + uint64_t m_max_packet_size; // as returned by qSupported + std::string m_qSupported_response; // the complete response to qSupported + + bool m_supported_async_json_packets_is_valid; + lldb_private::StructuredData::ObjectSP m_supported_async_json_packets_sp; + + std::vector<MemoryRegionInfo> m_qXfer_memory_map; + bool m_qXfer_memory_map_loaded; + + bool GetCurrentProcessInfo(bool allow_lazy_pid = true); + + bool GetGDBServerVersion(); + + // Given the list of compression types that the remote debug stub can support, + // possibly enable compression if we find an encoding we can handle. + void MaybeEnableCompression(std::vector<std::string> supported_compressions); + + bool DecodeProcessInfoResponse(StringExtractorGDBRemote &response, + ProcessInstanceInfo &process_info); + + void OnRunPacketSent(bool first) override; + + PacketResult SendThreadSpecificPacketAndWaitForResponse( + lldb::tid_t tid, StreamString &&payload, + StringExtractorGDBRemote &response, bool send_async); + + Status SendGetTraceDataPacket(StreamGDBRemote &packet, lldb::user_id_t uid, + lldb::tid_t thread_id, + llvm::MutableArrayRef<uint8_t> &buffer, + size_t offset); + + Status LoadQXferMemoryMap(); + + Status GetQXferMemoryMapRegionInfo(lldb::addr_t addr, + MemoryRegionInfo ®ion); + +private: + DISALLOW_COPY_AND_ASSIGN(GDBRemoteCommunicationClient); +}; + +} // namespace process_gdb_remote +} // namespace lldb_private + +#endif // liblldb_GDBRemoteCommunicationClient_h_ |