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llvm-project/lldb/source/Plugins/Platform/gdb-server/PlatformRemoteGDBServer.cpp

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//===-- PlatformRemoteGDBServer.cpp -----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "PlatformRemoteGDBServer.h"
#include "lldb/Host/Config.h"
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/Utility/UriParser.h"
#include "Plugins/Process/Utility/GDBRemoteSignals.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::platform_gdb_server;
static bool g_initialized = false;
void PlatformRemoteGDBServer::Initialize() {
Platform::Initialize();
if (g_initialized == false) {
g_initialized = true;
PluginManager::RegisterPlugin(
PlatformRemoteGDBServer::GetPluginNameStatic(),
PlatformRemoteGDBServer::GetDescriptionStatic(),
PlatformRemoteGDBServer::CreateInstance);
}
}
void PlatformRemoteGDBServer::Terminate() {
if (g_initialized) {
g_initialized = false;
PluginManager::UnregisterPlugin(PlatformRemoteGDBServer::CreateInstance);
}
Platform::Terminate();
}
PlatformSP PlatformRemoteGDBServer::CreateInstance(bool force,
const ArchSpec *arch) {
bool create = force;
if (!create) {
create = !arch->TripleVendorWasSpecified() && !arch->TripleOSWasSpecified();
}
if (create)
return PlatformSP(new PlatformRemoteGDBServer());
return PlatformSP();
}
ConstString PlatformRemoteGDBServer::GetPluginNameStatic() {
static ConstString g_name("remote-gdb-server");
return g_name;
}
const char *PlatformRemoteGDBServer::GetDescriptionStatic() {
return "A platform that uses the GDB remote protocol as the communication "
"transport.";
}
const char *PlatformRemoteGDBServer::GetDescription() {
if (m_platform_description.empty()) {
if (IsConnected()) {
// Send the get description packet
}
}
if (!m_platform_description.empty())
return m_platform_description.c_str();
return GetDescriptionStatic();
}
Status PlatformRemoteGDBServer::ResolveExecutable(
const ModuleSpec &module_spec, lldb::ModuleSP &exe_module_sp,
const FileSpecList *module_search_paths_ptr) {
// copied from PlatformRemoteiOS
Status error;
// Nothing special to do here, just use the actual file and architecture
ModuleSpec resolved_module_spec(module_spec);
// Resolve any executable within an apk on Android?
// Host::ResolveExecutableInBundle (resolved_module_spec.GetFileSpec());
if (resolved_module_spec.GetFileSpec().Exists() ||
module_spec.GetUUID().IsValid()) {
if (resolved_module_spec.GetArchitecture().IsValid() ||
resolved_module_spec.GetUUID().IsValid()) {
error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
module_search_paths_ptr, NULL, NULL);
if (exe_module_sp && exe_module_sp->GetObjectFile())
return error;
exe_module_sp.reset();
}
// No valid architecture was specified or the exact arch wasn't
// found so ask the platform for the architectures that we should be
// using (in the correct order) and see if we can find a match that way
StreamString arch_names;
for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
idx, resolved_module_spec.GetArchitecture());
++idx) {
error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
module_search_paths_ptr, NULL, NULL);
// Did we find an executable using one of the
if (error.Success()) {
if (exe_module_sp && exe_module_sp->GetObjectFile())
break;
else
error.SetErrorToGenericError();
}
if (idx > 0)
arch_names.PutCString(", ");
arch_names.PutCString(
resolved_module_spec.GetArchitecture().GetArchitectureName());
}
if (error.Fail() || !exe_module_sp) {
if (resolved_module_spec.GetFileSpec().Readable()) {
error.SetErrorStringWithFormat(
"'%s' doesn't contain any '%s' platform architectures: %s",
resolved_module_spec.GetFileSpec().GetPath().c_str(),
GetPluginName().GetCString(), arch_names.GetData());
} else {
error.SetErrorStringWithFormat(
"'%s' is not readable",
resolved_module_spec.GetFileSpec().GetPath().c_str());
}
}
} else {
error.SetErrorStringWithFormat(
"'%s' does not exist",
resolved_module_spec.GetFileSpec().GetPath().c_str());
}
return error;
}
bool PlatformRemoteGDBServer::GetModuleSpec(const FileSpec &module_file_spec,
const ArchSpec &arch,
ModuleSpec &module_spec) {
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
const auto module_path = module_file_spec.GetPath(false);
if (!m_gdb_client.GetModuleInfo(module_file_spec, arch, module_spec)) {
if (log)
log->Printf(
"PlatformRemoteGDBServer::%s - failed to get module info for %s:%s",
__FUNCTION__, module_path.c_str(),
arch.GetTriple().getTriple().c_str());
return false;
}
if (log) {
StreamString stream;
module_spec.Dump(stream);
log->Printf(
"PlatformRemoteGDBServer::%s - got module info for (%s:%s) : %s",
__FUNCTION__, module_path.c_str(), arch.GetTriple().getTriple().c_str(),
stream.GetData());
}
return true;
}
Status PlatformRemoteGDBServer::GetFileWithUUID(const FileSpec &platform_file,
const UUID *uuid_ptr,
FileSpec &local_file) {
// Default to the local case
local_file = platform_file;
return Status();
}
//------------------------------------------------------------------
/// Default Constructor
//------------------------------------------------------------------
PlatformRemoteGDBServer::PlatformRemoteGDBServer()
: Platform(false), // This is a remote platform
m_gdb_client() {}
//------------------------------------------------------------------
/// Destructor.
///
/// The destructor is virtual since this class is designed to be
/// inherited from by the plug-in instance.
//------------------------------------------------------------------
PlatformRemoteGDBServer::~PlatformRemoteGDBServer() {}
bool PlatformRemoteGDBServer::GetSupportedArchitectureAtIndex(uint32_t idx,
ArchSpec &arch) {
ArchSpec remote_arch = m_gdb_client.GetSystemArchitecture();
if (idx == 0) {
arch = remote_arch;
return arch.IsValid();
} else if (idx == 1 && remote_arch.IsValid() &&
remote_arch.GetTriple().isArch64Bit()) {
arch.SetTriple(remote_arch.GetTriple().get32BitArchVariant());
return arch.IsValid();
}
return false;
}
size_t PlatformRemoteGDBServer::GetSoftwareBreakpointTrapOpcode(
Target &target, BreakpointSite *bp_site) {
// This isn't needed if the z/Z packets are supported in the GDB remote
// server. But we might need a packet to detect this.
return 0;
}
bool PlatformRemoteGDBServer::GetRemoteOSVersion() {
uint32_t major, minor, update;
if (m_gdb_client.GetOSVersion(major, minor, update)) {
m_major_os_version = major;
m_minor_os_version = minor;
m_update_os_version = update;
return true;
}
return false;
}
bool PlatformRemoteGDBServer::GetRemoteOSBuildString(std::string &s) {
return m_gdb_client.GetOSBuildString(s);
}
bool PlatformRemoteGDBServer::GetRemoteOSKernelDescription(std::string &s) {
return m_gdb_client.GetOSKernelDescription(s);
}
// Remote Platform subclasses need to override this function
ArchSpec PlatformRemoteGDBServer::GetRemoteSystemArchitecture() {
return m_gdb_client.GetSystemArchitecture();
}
FileSpec PlatformRemoteGDBServer::GetRemoteWorkingDirectory() {
if (IsConnected()) {
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
FileSpec working_dir;
if (m_gdb_client.GetWorkingDir(working_dir) && log)
log->Printf(
"PlatformRemoteGDBServer::GetRemoteWorkingDirectory() -> '%s'",
working_dir.GetCString());
return working_dir;
} else {
return Platform::GetRemoteWorkingDirectory();
}
}
bool PlatformRemoteGDBServer::SetRemoteWorkingDirectory(
const FileSpec &working_dir) {
if (IsConnected()) {
// Clear the working directory it case it doesn't get set correctly. This
// will
// for use to re-read it
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("PlatformRemoteGDBServer::SetRemoteWorkingDirectory('%s')",
working_dir.GetCString());
return m_gdb_client.SetWorkingDir(working_dir) == 0;
} else
return Platform::SetRemoteWorkingDirectory(working_dir);
}
bool PlatformRemoteGDBServer::IsConnected() const {
return m_gdb_client.IsConnected();
}
Status PlatformRemoteGDBServer::ConnectRemote(Args &args) {
Status error;
if (IsConnected()) {
error.SetErrorStringWithFormat("the platform is already connected to '%s', "
"execute 'platform disconnect' to close the "
"current connection",
GetHostname());
} else {
if (args.GetArgumentCount() == 1) {
m_gdb_client.SetConnection(new ConnectionFileDescriptor());
// we're going to reuse the hostname when we connect to the debugserver
int port;
std::string path;
const char *url = args.GetArgumentAtIndex(0);
if (!url)
return Status("URL is null.");
llvm::StringRef scheme, hostname, pathname;
if (!UriParser::Parse(url, scheme, hostname, port, pathname))
return Status("Invalid URL: %s", url);
m_platform_scheme = scheme;
m_platform_hostname = hostname;
path = pathname;
const ConnectionStatus status = m_gdb_client.Connect(url, &error);
if (status == eConnectionStatusSuccess) {
if (m_gdb_client.HandshakeWithServer(&error)) {
m_gdb_client.GetHostInfo();
// If a working directory was set prior to connecting, send it down
// now
if (m_working_dir)
m_gdb_client.SetWorkingDir(m_working_dir);
} else {
m_gdb_client.Disconnect();
if (error.Success())
error.SetErrorString("handshake failed");
}
}
} else {
error.SetErrorString(
"\"platform connect\" takes a single argument: <connect-url>");
}
}
return error;
}
Status PlatformRemoteGDBServer::DisconnectRemote() {
Status error;
m_gdb_client.Disconnect(&error);
m_remote_signals_sp.reset();
return error;
}
const char *PlatformRemoteGDBServer::GetHostname() {
m_gdb_client.GetHostname(m_name);
if (m_name.empty())
return NULL;
return m_name.c_str();
}
const char *PlatformRemoteGDBServer::GetUserName(uint32_t uid) {
// Try and get a cache user name first
const char *cached_user_name = Platform::GetUserName(uid);
if (cached_user_name)
return cached_user_name;
std::string name;
if (m_gdb_client.GetUserName(uid, name))
return SetCachedUserName(uid, name.c_str(), name.size());
SetUserNameNotFound(uid); // Negative cache so we don't keep sending packets
return NULL;
}
const char *PlatformRemoteGDBServer::GetGroupName(uint32_t gid) {
const char *cached_group_name = Platform::GetGroupName(gid);
if (cached_group_name)
return cached_group_name;
std::string name;
if (m_gdb_client.GetGroupName(gid, name))
return SetCachedGroupName(gid, name.c_str(), name.size());
SetGroupNameNotFound(gid); // Negative cache so we don't keep sending packets
return NULL;
}
uint32_t PlatformRemoteGDBServer::FindProcesses(
const ProcessInstanceInfoMatch &match_info,
ProcessInstanceInfoList &process_infos) {
return m_gdb_client.FindProcesses(match_info, process_infos);
}
bool PlatformRemoteGDBServer::GetProcessInfo(
lldb::pid_t pid, ProcessInstanceInfo &process_info) {
return m_gdb_client.GetProcessInfo(pid, process_info);
}
Status PlatformRemoteGDBServer::LaunchProcess(ProcessLaunchInfo &launch_info) {
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
Status error;
if (log)
log->Printf("PlatformRemoteGDBServer::%s() called", __FUNCTION__);
auto num_file_actions = launch_info.GetNumFileActions();
for (decltype(num_file_actions) i = 0; i < num_file_actions; ++i) {
const auto file_action = launch_info.GetFileActionAtIndex(i);
if (file_action->GetAction() != FileAction::eFileActionOpen)
continue;
switch (file_action->GetFD()) {
case STDIN_FILENO:
m_gdb_client.SetSTDIN(file_action->GetFileSpec());
break;
case STDOUT_FILENO:
m_gdb_client.SetSTDOUT(file_action->GetFileSpec());
break;
case STDERR_FILENO:
m_gdb_client.SetSTDERR(file_action->GetFileSpec());
break;
}
}
m_gdb_client.SetDisableASLR(
launch_info.GetFlags().Test(eLaunchFlagDisableASLR));
m_gdb_client.SetDetachOnError(
launch_info.GetFlags().Test(eLaunchFlagDetachOnError));
FileSpec working_dir = launch_info.GetWorkingDirectory();
if (working_dir) {
m_gdb_client.SetWorkingDir(working_dir);
}
// Send the environment and the program + arguments after we connect
const char **envp =
launch_info.GetEnvironmentEntries().GetConstArgumentVector();
if (envp) {
const char *env_entry;
for (int i = 0; (env_entry = envp[i]); ++i) {
if (m_gdb_client.SendEnvironmentPacket(env_entry) != 0)
break;
}
}
ArchSpec arch_spec = launch_info.GetArchitecture();
const char *arch_triple = arch_spec.GetTriple().str().c_str();
m_gdb_client.SendLaunchArchPacket(arch_triple);
if (log)
log->Printf(
"PlatformRemoteGDBServer::%s() set launch architecture triple to '%s'",
__FUNCTION__, arch_triple ? arch_triple : "<NULL>");
int arg_packet_err;
{
// Scope for the scoped timeout object
process_gdb_remote::GDBRemoteCommunication::ScopedTimeout timeout(
m_gdb_client, std::chrono::seconds(5));
arg_packet_err = m_gdb_client.SendArgumentsPacket(launch_info);
}
if (arg_packet_err == 0) {
std::string error_str;
if (m_gdb_client.GetLaunchSuccess(error_str)) {
const auto pid = m_gdb_client.GetCurrentProcessID(false);
if (pid != LLDB_INVALID_PROCESS_ID) {
launch_info.SetProcessID(pid);
if (log)
log->Printf("PlatformRemoteGDBServer::%s() pid %" PRIu64
" launched successfully",
__FUNCTION__, pid);
} else {
if (log)
log->Printf("PlatformRemoteGDBServer::%s() launch succeeded but we "
"didn't get a valid process id back!",
__FUNCTION__);
error.SetErrorString("failed to get PID");
}
} else {
error.SetErrorString(error_str.c_str());
if (log)
log->Printf("PlatformRemoteGDBServer::%s() launch failed: %s",
__FUNCTION__, error.AsCString());
}
} else {
error.SetErrorStringWithFormat("'A' packet returned an error: %i",
arg_packet_err);
}
return error;
}
Status PlatformRemoteGDBServer::KillProcess(const lldb::pid_t pid) {
if (!KillSpawnedProcess(pid))
return Status("failed to kill remote spawned process");
return Status();
}
lldb::ProcessSP PlatformRemoteGDBServer::DebugProcess(
ProcessLaunchInfo &launch_info, Debugger &debugger,
Target *target, // Can be NULL, if NULL create a new target, else use
// existing one
Status &error) {
lldb::ProcessSP process_sp;
if (IsRemote()) {
if (IsConnected()) {
lldb::pid_t debugserver_pid = LLDB_INVALID_PROCESS_ID;
std::string connect_url;
if (!LaunchGDBServer(debugserver_pid, connect_url)) {
error.SetErrorStringWithFormat("unable to launch a GDB server on '%s'",
GetHostname());
} else {
if (target == NULL) {
TargetSP new_target_sp;
error = debugger.GetTargetList().CreateTarget(debugger, "", "", false,
NULL, new_target_sp);
target = new_target_sp.get();
} else
error.Clear();
if (target && error.Success()) {
debugger.GetTargetList().SetSelectedTarget(target);
// The darwin always currently uses the GDB remote debugger plug-in
// so even when debugging locally we are debugging remotely!
process_sp = target->CreateProcess(
launch_info.GetListenerForProcess(debugger), "gdb-remote", NULL);
if (process_sp) {
error = process_sp->ConnectRemote(nullptr, connect_url.c_str());
// Retry the connect remote one time...
if (error.Fail())
error = process_sp->ConnectRemote(nullptr, connect_url.c_str());
if (error.Success())
error = process_sp->Launch(launch_info);
else if (debugserver_pid != LLDB_INVALID_PROCESS_ID) {
printf("error: connect remote failed (%s)\n", error.AsCString());
KillSpawnedProcess(debugserver_pid);
}
}
}
}
} else {
error.SetErrorString("not connected to remote gdb server");
}
}
return process_sp;
}
bool PlatformRemoteGDBServer::LaunchGDBServer(lldb::pid_t &pid,
std::string &connect_url) {
ArchSpec remote_arch = GetRemoteSystemArchitecture();
llvm::Triple &remote_triple = remote_arch.GetTriple();
uint16_t port = 0;
std::string socket_name;
bool launch_result = false;
if (remote_triple.getVendor() == llvm::Triple::Apple &&
remote_triple.getOS() == llvm::Triple::IOS) {
// When remote debugging to iOS, we use a USB mux that always talks
// to localhost, so we will need the remote debugserver to accept
// connections
// only from localhost, no matter what our current hostname is
launch_result =
m_gdb_client.LaunchGDBServer("127.0.0.1", pid, port, socket_name);
} else {
// All other hosts should use their actual hostname
launch_result =
m_gdb_client.LaunchGDBServer(nullptr, pid, port, socket_name);
}
if (!launch_result)
return false;
connect_url =
MakeGdbServerUrl(m_platform_scheme, m_platform_hostname, port,
(socket_name.empty()) ? nullptr : socket_name.c_str());
return true;
}
bool PlatformRemoteGDBServer::KillSpawnedProcess(lldb::pid_t pid) {
return m_gdb_client.KillSpawnedProcess(pid);
}
lldb::ProcessSP PlatformRemoteGDBServer::Attach(
ProcessAttachInfo &attach_info, Debugger &debugger,
Target *target, // Can be NULL, if NULL create a new target, else use
// existing one
Status &error) {
lldb::ProcessSP process_sp;
if (IsRemote()) {
if (IsConnected()) {
lldb::pid_t debugserver_pid = LLDB_INVALID_PROCESS_ID;
std::string connect_url;
if (!LaunchGDBServer(debugserver_pid, connect_url)) {
error.SetErrorStringWithFormat("unable to launch a GDB server on '%s'",
GetHostname());
} else {
if (target == NULL) {
TargetSP new_target_sp;
error = debugger.GetTargetList().CreateTarget(debugger, "", "", false,
NULL, new_target_sp);
target = new_target_sp.get();
} else
error.Clear();
if (target && error.Success()) {
debugger.GetTargetList().SetSelectedTarget(target);
// The darwin always currently uses the GDB remote debugger plug-in
// so even when debugging locally we are debugging remotely!
process_sp = target->CreateProcess(
attach_info.GetListenerForProcess(debugger), "gdb-remote", NULL);
if (process_sp) {
error = process_sp->ConnectRemote(nullptr, connect_url.c_str());
if (error.Success()) {
ListenerSP listener_sp = attach_info.GetHijackListener();
if (listener_sp)
process_sp->HijackProcessEvents(listener_sp);
error = process_sp->Attach(attach_info);
}
if (error.Fail() && debugserver_pid != LLDB_INVALID_PROCESS_ID) {
KillSpawnedProcess(debugserver_pid);
}
}
}
}
} else {
error.SetErrorString("not connected to remote gdb server");
}
}
return process_sp;
}
Status PlatformRemoteGDBServer::MakeDirectory(const FileSpec &file_spec,
uint32_t mode) {
Status error = m_gdb_client.MakeDirectory(file_spec, mode);
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("PlatformRemoteGDBServer::MakeDirectory(path='%s', mode=%o) "
"error = %u (%s)",
file_spec.GetCString(), mode, error.GetError(),
error.AsCString());
return error;
}
Status PlatformRemoteGDBServer::GetFilePermissions(const FileSpec &file_spec,
uint32_t &file_permissions) {
Status error = m_gdb_client.GetFilePermissions(file_spec, file_permissions);
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("PlatformRemoteGDBServer::GetFilePermissions(path='%s', "
"file_permissions=%o) error = %u (%s)",
file_spec.GetCString(), file_permissions, error.GetError(),
error.AsCString());
return error;
}
Status PlatformRemoteGDBServer::SetFilePermissions(const FileSpec &file_spec,
uint32_t file_permissions) {
Status error = m_gdb_client.SetFilePermissions(file_spec, file_permissions);
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("PlatformRemoteGDBServer::SetFilePermissions(path='%s', "
"file_permissions=%o) error = %u (%s)",
file_spec.GetCString(), file_permissions, error.GetError(),
error.AsCString());
return error;
}
lldb::user_id_t PlatformRemoteGDBServer::OpenFile(const FileSpec &file_spec,
uint32_t flags, uint32_t mode,
Status &error) {
return m_gdb_client.OpenFile(file_spec, flags, mode, error);
}
bool PlatformRemoteGDBServer::CloseFile(lldb::user_id_t fd, Status &error) {
return m_gdb_client.CloseFile(fd, error);
}
lldb::user_id_t
PlatformRemoteGDBServer::GetFileSize(const FileSpec &file_spec) {
return m_gdb_client.GetFileSize(file_spec);
}
uint64_t PlatformRemoteGDBServer::ReadFile(lldb::user_id_t fd, uint64_t offset,
void *dst, uint64_t dst_len,
Status &error) {
return m_gdb_client.ReadFile(fd, offset, dst, dst_len, error);
}
uint64_t PlatformRemoteGDBServer::WriteFile(lldb::user_id_t fd, uint64_t offset,
const void *src, uint64_t src_len,
Status &error) {
return m_gdb_client.WriteFile(fd, offset, src, src_len, error);
}
Status PlatformRemoteGDBServer::PutFile(const FileSpec &source,
const FileSpec &destination,
uint32_t uid, uint32_t gid) {
return Platform::PutFile(source, destination, uid, gid);
}
Status PlatformRemoteGDBServer::CreateSymlink(
const FileSpec &src, // The name of the link is in src
const FileSpec &dst) // The symlink points to dst
{
Status error = m_gdb_client.CreateSymlink(src, dst);
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("PlatformRemoteGDBServer::CreateSymlink(src='%s', dst='%s') "
"error = %u (%s)",
src.GetCString(), dst.GetCString(), error.GetError(),
error.AsCString());
return error;
}
Status PlatformRemoteGDBServer::Unlink(const FileSpec &file_spec) {
Status error = m_gdb_client.Unlink(file_spec);
Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM);
if (log)
log->Printf("PlatformRemoteGDBServer::Unlink(path='%s') error = %u (%s)",
file_spec.GetCString(), error.GetError(), error.AsCString());
return error;
}
bool PlatformRemoteGDBServer::GetFileExists(const FileSpec &file_spec) {
return m_gdb_client.GetFileExists(file_spec);
}
Status PlatformRemoteGDBServer::RunShellCommand(
const char *command, // Shouldn't be NULL
const FileSpec &
working_dir, // Pass empty FileSpec to use the current working directory
int *status_ptr, // Pass NULL if you don't want the process exit status
int *signo_ptr, // Pass NULL if you don't want the signal that caused the
// process to exit
std::string
*command_output, // Pass NULL if you don't want the command output
uint32_t
timeout_sec) // Timeout in seconds to wait for shell program to finish
{
return m_gdb_client.RunShellCommand(command, working_dir, status_ptr,
signo_ptr, command_output, timeout_sec);
}
void PlatformRemoteGDBServer::CalculateTrapHandlerSymbolNames() {
m_trap_handlers.push_back(ConstString("_sigtramp"));
}
const UnixSignalsSP &PlatformRemoteGDBServer::GetRemoteUnixSignals() {
if (!IsConnected())
return Platform::GetRemoteUnixSignals();
if (m_remote_signals_sp)
return m_remote_signals_sp;
// If packet not implemented or JSON failed to parse,
// we'll guess the signal set based on the remote architecture.
m_remote_signals_sp = UnixSignals::Create(GetRemoteSystemArchitecture());
StringExtractorGDBRemote response;
auto result = m_gdb_client.SendPacketAndWaitForResponse("jSignalsInfo",
response, false);
if (result != decltype(result)::Success ||
response.GetResponseType() != response.eResponse)
return m_remote_signals_sp;
auto object_sp = StructuredData::ParseJSON(response.GetStringRef());
if (!object_sp || !object_sp->IsValid())
return m_remote_signals_sp;
auto array_sp = object_sp->GetAsArray();
if (!array_sp || !array_sp->IsValid())
return m_remote_signals_sp;
auto remote_signals_sp = std::make_shared<lldb_private::GDBRemoteSignals>();
bool done = array_sp->ForEach(
[&remote_signals_sp](StructuredData::Object *object) -> bool {
if (!object || !object->IsValid())
return false;
auto dict = object->GetAsDictionary();
if (!dict || !dict->IsValid())
return false;
// Signal number and signal name are required.
int signo;
if (!dict->GetValueForKeyAsInteger("signo", signo))
return false;
llvm::StringRef name;
if (!dict->GetValueForKeyAsString("name", name))
return false;
// We can live without short_name, description, etc.
bool suppress{false};
auto object_sp = dict->GetValueForKey("suppress");
if (object_sp && object_sp->IsValid())
suppress = object_sp->GetBooleanValue();
bool stop{false};
object_sp = dict->GetValueForKey("stop");
if (object_sp && object_sp->IsValid())
stop = object_sp->GetBooleanValue();
bool notify{false};
object_sp = dict->GetValueForKey("notify");
if (object_sp && object_sp->IsValid())
notify = object_sp->GetBooleanValue();
std::string description{""};
object_sp = dict->GetValueForKey("description");
if (object_sp && object_sp->IsValid())
description = object_sp->GetStringValue();
remote_signals_sp->AddSignal(signo, name.str().c_str(), suppress, stop,
notify, description.c_str());
return true;
});
if (done)
m_remote_signals_sp = std::move(remote_signals_sp);
return m_remote_signals_sp;
}
std::string PlatformRemoteGDBServer::MakeGdbServerUrl(
const std::string &platform_scheme, const std::string &platform_hostname,
uint16_t port, const char *socket_name) {
const char *override_scheme =
getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_SCHEME");
const char *override_hostname =
getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_HOSTNAME");
const char *port_offset_c_str =
getenv("LLDB_PLATFORM_REMOTE_GDB_SERVER_PORT_OFFSET");
int port_offset = port_offset_c_str ? ::atoi(port_offset_c_str) : 0;
return MakeUrl(override_scheme ? override_scheme : platform_scheme.c_str(),
override_hostname ? override_hostname
: platform_hostname.c_str(),
port + port_offset, socket_name);
}
std::string PlatformRemoteGDBServer::MakeUrl(const char *scheme,
const char *hostname,
uint16_t port, const char *path) {
StreamString result;
result.Printf("%s://%s", scheme, hostname);
if (port != 0)
result.Printf(":%u", port);
if (path)
result.Write(path, strlen(path));
return result.GetString();
}
lldb::ProcessSP PlatformRemoteGDBServer::ConnectProcess(
llvm::StringRef connect_url, llvm::StringRef plugin_name,
lldb_private::Debugger &debugger, lldb_private::Target *target,
lldb_private::Status &error) {
if (!IsRemote() || !IsConnected()) {
error.SetErrorString("Not connected to remote gdb server");
return nullptr;
}
return Platform::ConnectProcess(connect_url, plugin_name, debugger, target,
error);
}
size_t PlatformRemoteGDBServer::ConnectToWaitingProcesses(Debugger &debugger,
Status &error) {
std::vector<std::string> connection_urls;
GetPendingGdbServerList(connection_urls);
for (size_t i = 0; i < connection_urls.size(); ++i) {
ConnectProcess(connection_urls[i].c_str(), "", debugger, nullptr, error);
if (error.Fail())
return i; // We already connected to i process succsessfully
}
return connection_urls.size();
}
size_t PlatformRemoteGDBServer::GetPendingGdbServerList(
std::vector<std::string> &connection_urls) {
std::vector<std::pair<uint16_t, std::string>> remote_servers;
m_gdb_client.QueryGDBServer(remote_servers);
for (const auto &gdbserver : remote_servers) {
const char *socket_name_cstr =
gdbserver.second.empty() ? nullptr : gdbserver.second.c_str();
connection_urls.emplace_back(
MakeGdbServerUrl(m_platform_scheme, m_platform_hostname,
gdbserver.first, socket_name_cstr));
}
return connection_urls.size();
}
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