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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/Error.h"
#include "lldb/Core/Log.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/Core/StreamString.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "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();
}
Error
PlatformRemoteGDBServer::ResolveExecutable (const ModuleSpec &module_spec,
lldb::ModuleSP &exe_module_sp,
const FileSpecList *module_search_paths_ptr)
{
// copied from PlatformRemoteiOS
Error 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.GetString().c_str());
}
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.GetString ().c_str ());
}
return true;
}
Error
PlatformRemoteGDBServer::GetFileWithUUID (const FileSpec &platform_file,
const UUID *uuid_ptr,
FileSpec &local_file)
{
// Default to the local case
local_file = platform_file;
return Error();
}
//------------------------------------------------------------------
/// 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();
}
Error
PlatformRemoteGDBServer::ConnectRemote (Args& args)
{
Error 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 Error("URL is null.");
if (!UriParser::Parse(url, m_platform_scheme, m_platform_hostname, port, path))
return Error("Invalid URL: %s", url);
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;
}
Error
PlatformRemoteGDBServer::DisconnectRemote ()
{
Error 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);
}
Error
PlatformRemoteGDBServer::LaunchProcess (ProcessLaunchInfo &launch_info)
{
Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_PLATFORM));
Error 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, 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;
}
Error
PlatformRemoteGDBServer::KillProcess (const lldb::pid_t pid)
{
if (!KillSpawnedProcess(pid))
return Error("failed to kill remote spawned process");
return Error();
}
lldb::ProcessSP
PlatformRemoteGDBServer::DebugProcess (ProcessLaunchInfo &launch_info,
Debugger &debugger,
Target *target, // Can be NULL, if NULL create a new target, else use existing one
Error &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,
NULL,
NULL,
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
Error &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,
NULL,
NULL,
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;
}
Error
PlatformRemoteGDBServer::MakeDirectory(const FileSpec &file_spec, uint32_t mode)
{
Error 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;
}
Error
PlatformRemoteGDBServer::GetFilePermissions(const FileSpec &file_spec,
uint32_t &file_permissions)
{
Error 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;
}
Error
PlatformRemoteGDBServer::SetFilePermissions(const FileSpec &file_spec,
uint32_t file_permissions)
{
Error 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,
Error &error)
{
return m_gdb_client.OpenFile (file_spec, flags, mode, error);
}
bool
PlatformRemoteGDBServer::CloseFile (lldb::user_id_t fd, Error &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,
Error &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,
Error &error)
{
return m_gdb_client.WriteFile (fd, offset, src, src_len, error);
}
Error
PlatformRemoteGDBServer::PutFile (const FileSpec& source,
const FileSpec& destination,
uint32_t uid,
uint32_t gid)
{
return Platform::PutFile(source,destination,uid,gid);
}
Error
PlatformRemoteGDBServer::CreateSymlink(const FileSpec &src, // The name of the link is in src
const FileSpec &dst) // The symlink points to dst
{
Error 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;
}
Error
PlatformRemoteGDBServer::Unlink(const FileSpec &file_spec)
{
Error 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);
}
Error
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());
const char packet[] = "jSignalsInfo";
StringExtractorGDBRemote response;
auto result = m_gdb_client.SendPacketAndWaitForResponse(
packet, strlen(packet), 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;
std::string 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.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(const char* connect_url,
const char* plugin_name,
lldb_private::Debugger &debugger,
lldb_private::Target *target,
lldb_private::Error &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, Error& 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(), nullptr, 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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