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