//===-- PlatformPOSIX.cpp ---------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "PlatformPOSIX.h" // C Includes // C++ Includes // Other libraries and framework includes // Project includes #include "lldb/Core/Debugger.h" #include "lldb/Core/Module.h" #include "lldb/Core/ModuleSpec.h" #include "lldb/Core/ValueObject.h" #include "lldb/Expression/UserExpression.h" #include "lldb/Host/File.h" #include "lldb/Host/FileCache.h" #include "lldb/Host/FileSystem.h" #include "lldb/Host/Host.h" #include "lldb/Host/HostInfo.h" #include "lldb/Target/DynamicLoader.h" #include "lldb/Target/ExecutionContext.h" #include "lldb/Target/Process.h" #include "lldb/Target/ProcessLaunchInfo.h" #include "lldb/Target/Thread.h" #include "lldb/Utility/DataBufferHeap.h" #include "lldb/Utility/FileSpec.h" #include "lldb/Utility/Log.h" #include "lldb/Utility/StreamString.h" using namespace lldb; using namespace lldb_private; //------------------------------------------------------------------ /// Default Constructor //------------------------------------------------------------------ PlatformPOSIX::PlatformPOSIX(bool is_host) : Platform(is_host), // This is the local host platform m_option_group_platform_rsync(new OptionGroupPlatformRSync()), m_option_group_platform_ssh(new OptionGroupPlatformSSH()), m_option_group_platform_caching(new OptionGroupPlatformCaching()), m_remote_platform_sp() {} //------------------------------------------------------------------ /// Destructor. /// /// The destructor is virtual since this class is designed to be /// inherited from by the plug-in instance. //------------------------------------------------------------------ PlatformPOSIX::~PlatformPOSIX() {} bool PlatformPOSIX::GetModuleSpec(const FileSpec &module_file_spec, const ArchSpec &arch, ModuleSpec &module_spec) { if (m_remote_platform_sp) return m_remote_platform_sp->GetModuleSpec(module_file_spec, arch, module_spec); return Platform::GetModuleSpec(module_file_spec, arch, module_spec); } lldb_private::OptionGroupOptions *PlatformPOSIX::GetConnectionOptions( lldb_private::CommandInterpreter &interpreter) { auto iter = m_options.find(&interpreter), end = m_options.end(); if (iter == end) { std::unique_ptr options( new OptionGroupOptions()); options->Append(m_option_group_platform_rsync.get()); options->Append(m_option_group_platform_ssh.get()); options->Append(m_option_group_platform_caching.get()); m_options[&interpreter] = std::move(options); } return m_options.at(&interpreter).get(); } bool PlatformPOSIX::IsConnected() const { if (IsHost()) return true; else if (m_remote_platform_sp) return m_remote_platform_sp->IsConnected(); return false; } lldb_private::Status PlatformPOSIX::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 { if (IsHost()) return Host::RunShellCommand(command, working_dir, status_ptr, signo_ptr, command_output, timeout_sec); else { if (m_remote_platform_sp) return m_remote_platform_sp->RunShellCommand(command, working_dir, status_ptr, signo_ptr, command_output, timeout_sec); else return Status("unable to run a remote command without a platform"); } } Status PlatformPOSIX::ResolveExecutable(const ModuleSpec &module_spec, lldb::ModuleSP &exe_module_sp, const FileSpecList *module_search_paths_ptr) { Status error; // Nothing special to do here, just use the actual file and architecture char exe_path[PATH_MAX]; ModuleSpec resolved_module_spec(module_spec); if (IsHost()) { // If we have "ls" as the exe_file, resolve the executable location based on // the current path variables if (!resolved_module_spec.GetFileSpec().Exists()) { resolved_module_spec.GetFileSpec().GetPath(exe_path, sizeof(exe_path)); resolved_module_spec.GetFileSpec().SetFile(exe_path, true); } if (!resolved_module_spec.GetFileSpec().Exists()) resolved_module_spec.GetFileSpec().ResolveExecutableLocation(); // Resolve any executable within a bundle on MacOSX Host::ResolveExecutableInBundle(resolved_module_spec.GetFileSpec()); if (resolved_module_spec.GetFileSpec().Exists()) error.Clear(); else { const uint32_t permissions = resolved_module_spec.GetFileSpec().GetPermissions(); if (permissions && (permissions & eFilePermissionsEveryoneR) == 0) error.SetErrorStringWithFormat( "executable '%s' is not readable", resolved_module_spec.GetFileSpec().GetPath().c_str()); else error.SetErrorStringWithFormat( "unable to find executable for '%s'", resolved_module_spec.GetFileSpec().GetPath().c_str()); } } else { if (m_remote_platform_sp) { error = GetCachedExecutable(resolved_module_spec, exe_module_sp, module_search_paths_ptr, *m_remote_platform_sp); } else { // We may connect to a process and use the provided executable (Don't use // local $PATH). // Resolve any executable within a bundle on MacOSX Host::ResolveExecutableInBundle(resolved_module_spec.GetFileSpec()); if (resolved_module_spec.GetFileSpec().Exists()) error.Clear(); else error.SetErrorStringWithFormat("the platform is not currently " "connected, and '%s' doesn't exist in " "the system root.", exe_path); } } if (error.Success()) { if (resolved_module_spec.GetArchitecture().IsValid()) { error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp, module_search_paths_ptr, nullptr, nullptr); if (error.Fail()) { // If we failed, it may be because the vendor and os aren't known. If // that is the case, try setting them to the host architecture and give // it another try. llvm::Triple &module_triple = resolved_module_spec.GetArchitecture().GetTriple(); bool is_vendor_specified = (module_triple.getVendor() != llvm::Triple::UnknownVendor); bool is_os_specified = (module_triple.getOS() != llvm::Triple::UnknownOS); if (!is_vendor_specified || !is_os_specified) { const llvm::Triple &host_triple = HostInfo::GetArchitecture(HostInfo::eArchKindDefault).GetTriple(); if (!is_vendor_specified) module_triple.setVendorName(host_triple.getVendorName()); if (!is_os_specified) module_triple.setOSName(host_triple.getOSName()); error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp, module_search_paths_ptr, nullptr, nullptr); } } // TODO find out why exe_module_sp might be NULL if (error.Fail() || !exe_module_sp || !exe_module_sp->GetObjectFile()) { exe_module_sp.reset(); error.SetErrorStringWithFormat( "'%s' doesn't contain the architecture %s", resolved_module_spec.GetFileSpec().GetPath().c_str(), resolved_module_spec.GetArchitecture().GetArchitectureName()); } } else { // No valid architecture was specified, 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, nullptr, nullptr); // 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()); } } } } return error; } Status PlatformPOSIX::GetFileWithUUID(const FileSpec &platform_file, const UUID *uuid_ptr, FileSpec &local_file) { if (IsRemote() && m_remote_platform_sp) return m_remote_platform_sp->GetFileWithUUID(platform_file, uuid_ptr, local_file); // Default to the local case local_file = platform_file; return Status(); } bool PlatformPOSIX::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) { if (IsHost()) return Platform::GetProcessInfo(pid, process_info); if (m_remote_platform_sp) return m_remote_platform_sp->GetProcessInfo(pid, process_info); return false; } uint32_t PlatformPOSIX::FindProcesses(const ProcessInstanceInfoMatch &match_info, ProcessInstanceInfoList &process_infos) { if (IsHost()) return Platform::FindProcesses(match_info, process_infos); if (m_remote_platform_sp) return m_remote_platform_sp->FindProcesses(match_info, process_infos); return 0; } Status PlatformPOSIX::MakeDirectory(const FileSpec &file_spec, uint32_t file_permissions) { if (m_remote_platform_sp) return m_remote_platform_sp->MakeDirectory(file_spec, file_permissions); else return Platform::MakeDirectory(file_spec, file_permissions); } Status PlatformPOSIX::GetFilePermissions(const FileSpec &file_spec, uint32_t &file_permissions) { if (m_remote_platform_sp) return m_remote_platform_sp->GetFilePermissions(file_spec, file_permissions); else return Platform::GetFilePermissions(file_spec, file_permissions); } Status PlatformPOSIX::SetFilePermissions(const FileSpec &file_spec, uint32_t file_permissions) { if (m_remote_platform_sp) return m_remote_platform_sp->SetFilePermissions(file_spec, file_permissions); else return Platform::SetFilePermissions(file_spec, file_permissions); } lldb::user_id_t PlatformPOSIX::OpenFile(const FileSpec &file_spec, uint32_t flags, uint32_t mode, Status &error) { if (IsHost()) return FileCache::GetInstance().OpenFile(file_spec, flags, mode, error); else if (m_remote_platform_sp) return m_remote_platform_sp->OpenFile(file_spec, flags, mode, error); else return Platform::OpenFile(file_spec, flags, mode, error); } bool PlatformPOSIX::CloseFile(lldb::user_id_t fd, Status &error) { if (IsHost()) return FileCache::GetInstance().CloseFile(fd, error); else if (m_remote_platform_sp) return m_remote_platform_sp->CloseFile(fd, error); else return Platform::CloseFile(fd, error); } uint64_t PlatformPOSIX::ReadFile(lldb::user_id_t fd, uint64_t offset, void *dst, uint64_t dst_len, Status &error) { if (IsHost()) return FileCache::GetInstance().ReadFile(fd, offset, dst, dst_len, error); else if (m_remote_platform_sp) return m_remote_platform_sp->ReadFile(fd, offset, dst, dst_len, error); else return Platform::ReadFile(fd, offset, dst, dst_len, error); } uint64_t PlatformPOSIX::WriteFile(lldb::user_id_t fd, uint64_t offset, const void *src, uint64_t src_len, Status &error) { if (IsHost()) return FileCache::GetInstance().WriteFile(fd, offset, src, src_len, error); else if (m_remote_platform_sp) return m_remote_platform_sp->WriteFile(fd, offset, src, src_len, error); else return Platform::WriteFile(fd, offset, src, src_len, error); } static uint32_t chown_file(Platform *platform, const char *path, uint32_t uid = UINT32_MAX, uint32_t gid = UINT32_MAX) { if (!platform || !path || *path == 0) return UINT32_MAX; if (uid == UINT32_MAX && gid == UINT32_MAX) return 0; // pretend I did chown correctly - actually I just didn't care StreamString command; command.PutCString("chown "); if (uid != UINT32_MAX) command.Printf("%d", uid); if (gid != UINT32_MAX) command.Printf(":%d", gid); command.Printf("%s", path); int status; platform->RunShellCommand(command.GetData(), NULL, &status, NULL, NULL, 10); return status; } lldb_private::Status PlatformPOSIX::PutFile(const lldb_private::FileSpec &source, const lldb_private::FileSpec &destination, uint32_t uid, uint32_t gid) { Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); if (IsHost()) { if (FileSpec::Equal(source, destination, true)) return Status(); // cp src dst // chown uid:gid dst std::string src_path(source.GetPath()); if (src_path.empty()) return Status("unable to get file path for source"); std::string dst_path(destination.GetPath()); if (dst_path.empty()) return Status("unable to get file path for destination"); StreamString command; command.Printf("cp %s %s", src_path.c_str(), dst_path.c_str()); int status; RunShellCommand(command.GetData(), NULL, &status, NULL, NULL, 10); if (status != 0) return Status("unable to perform copy"); if (uid == UINT32_MAX && gid == UINT32_MAX) return Status(); if (chown_file(this, dst_path.c_str(), uid, gid) != 0) return Status("unable to perform chown"); return Status(); } else if (m_remote_platform_sp) { if (GetSupportsRSync()) { std::string src_path(source.GetPath()); if (src_path.empty()) return Status("unable to get file path for source"); std::string dst_path(destination.GetPath()); if (dst_path.empty()) return Status("unable to get file path for destination"); StreamString command; if (GetIgnoresRemoteHostname()) { if (!GetRSyncPrefix()) command.Printf("rsync %s %s %s", GetRSyncOpts(), src_path.c_str(), dst_path.c_str()); else command.Printf("rsync %s %s %s%s", GetRSyncOpts(), src_path.c_str(), GetRSyncPrefix(), dst_path.c_str()); } else command.Printf("rsync %s %s %s:%s", GetRSyncOpts(), src_path.c_str(), GetHostname(), dst_path.c_str()); if (log) log->Printf("[PutFile] Running command: %s\n", command.GetData()); int retcode; Host::RunShellCommand(command.GetData(), NULL, &retcode, NULL, NULL, 60); if (retcode == 0) { // Don't chown a local file for a remote system // if (chown_file(this,dst_path.c_str(),uid,gid) != 0) // return Status("unable to perform chown"); return Status(); } // if we are still here rsync has failed - let's try the slow way before // giving up } } return Platform::PutFile(source, destination, uid, gid); } lldb::user_id_t PlatformPOSIX::GetFileSize(const FileSpec &file_spec) { if (IsHost()) { uint64_t Size; if (llvm::sys::fs::file_size(file_spec.GetPath(), Size)) return 0; return Size; } else if (m_remote_platform_sp) return m_remote_platform_sp->GetFileSize(file_spec); else return Platform::GetFileSize(file_spec); } Status PlatformPOSIX::CreateSymlink(const FileSpec &src, const FileSpec &dst) { if (IsHost()) return FileSystem::Symlink(src, dst); else if (m_remote_platform_sp) return m_remote_platform_sp->CreateSymlink(src, dst); else return Platform::CreateSymlink(src, dst); } bool PlatformPOSIX::GetFileExists(const FileSpec &file_spec) { if (IsHost()) return file_spec.Exists(); else if (m_remote_platform_sp) return m_remote_platform_sp->GetFileExists(file_spec); else return Platform::GetFileExists(file_spec); } Status PlatformPOSIX::Unlink(const FileSpec &file_spec) { if (IsHost()) return llvm::sys::fs::remove(file_spec.GetPath()); else if (m_remote_platform_sp) return m_remote_platform_sp->Unlink(file_spec); else return Platform::Unlink(file_spec); } lldb_private::Status PlatformPOSIX::GetFile( const lldb_private::FileSpec &source, // remote file path const lldb_private::FileSpec &destination) // local file path { Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); // Check the args, first. std::string src_path(source.GetPath()); if (src_path.empty()) return Status("unable to get file path for source"); std::string dst_path(destination.GetPath()); if (dst_path.empty()) return Status("unable to get file path for destination"); if (IsHost()) { if (FileSpec::Equal(source, destination, true)) return Status("local scenario->source and destination are the same file " "path: no operation performed"); // cp src dst StreamString cp_command; cp_command.Printf("cp %s %s", src_path.c_str(), dst_path.c_str()); int status; RunShellCommand(cp_command.GetData(), NULL, &status, NULL, NULL, 10); if (status != 0) return Status("unable to perform copy"); return Status(); } else if (m_remote_platform_sp) { if (GetSupportsRSync()) { StreamString command; if (GetIgnoresRemoteHostname()) { if (!GetRSyncPrefix()) command.Printf("rsync %s %s %s", GetRSyncOpts(), src_path.c_str(), dst_path.c_str()); else command.Printf("rsync %s %s%s %s", GetRSyncOpts(), GetRSyncPrefix(), src_path.c_str(), dst_path.c_str()); } else command.Printf("rsync %s %s:%s %s", GetRSyncOpts(), m_remote_platform_sp->GetHostname(), src_path.c_str(), dst_path.c_str()); if (log) log->Printf("[GetFile] Running command: %s\n", command.GetData()); int retcode; Host::RunShellCommand(command.GetData(), NULL, &retcode, NULL, NULL, 60); if (retcode == 0) return Status(); // If we are here, rsync has failed - let's try the slow way before giving // up } // open src and dst // read/write, read/write, read/write, ... // close src // close dst if (log) log->Printf("[GetFile] Using block by block transfer....\n"); Status error; user_id_t fd_src = OpenFile(source, File::eOpenOptionRead, lldb::eFilePermissionsFileDefault, error); if (fd_src == UINT64_MAX) return Status("unable to open source file"); uint32_t permissions = 0; error = GetFilePermissions(source, permissions); if (permissions == 0) permissions = lldb::eFilePermissionsFileDefault; user_id_t fd_dst = FileCache::GetInstance().OpenFile( destination, File::eOpenOptionCanCreate | File::eOpenOptionWrite | File::eOpenOptionTruncate, permissions, error); if (fd_dst == UINT64_MAX) { if (error.Success()) error.SetErrorString("unable to open destination file"); } if (error.Success()) { lldb::DataBufferSP buffer_sp(new DataBufferHeap(1024, 0)); uint64_t offset = 0; error.Clear(); while (error.Success()) { const uint64_t n_read = ReadFile(fd_src, offset, buffer_sp->GetBytes(), buffer_sp->GetByteSize(), error); if (error.Fail()) break; if (n_read == 0) break; if (FileCache::GetInstance().WriteFile(fd_dst, offset, buffer_sp->GetBytes(), n_read, error) != n_read) { if (!error.Fail()) error.SetErrorString("unable to write to destination file"); break; } offset += n_read; } } // Ignore the close error of src. if (fd_src != UINT64_MAX) CloseFile(fd_src, error); // And close the dst file descriptot. if (fd_dst != UINT64_MAX && !FileCache::GetInstance().CloseFile(fd_dst, error)) { if (!error.Fail()) error.SetErrorString("unable to close destination file"); } return error; } return Platform::GetFile(source, destination); } std::string PlatformPOSIX::GetPlatformSpecificConnectionInformation() { StreamString stream; if (GetSupportsRSync()) { stream.PutCString("rsync"); if ((GetRSyncOpts() && *GetRSyncOpts()) || (GetRSyncPrefix() && *GetRSyncPrefix()) || GetIgnoresRemoteHostname()) { stream.Printf(", options: "); if (GetRSyncOpts() && *GetRSyncOpts()) stream.Printf("'%s' ", GetRSyncOpts()); stream.Printf(", prefix: "); if (GetRSyncPrefix() && *GetRSyncPrefix()) stream.Printf("'%s' ", GetRSyncPrefix()); if (GetIgnoresRemoteHostname()) stream.Printf("ignore remote-hostname "); } } if (GetSupportsSSH()) { stream.PutCString("ssh"); if (GetSSHOpts() && *GetSSHOpts()) stream.Printf(", options: '%s' ", GetSSHOpts()); } if (GetLocalCacheDirectory() && *GetLocalCacheDirectory()) stream.Printf("cache dir: %s", GetLocalCacheDirectory()); if (stream.GetSize()) return stream.GetString(); else return ""; } bool PlatformPOSIX::CalculateMD5(const FileSpec &file_spec, uint64_t &low, uint64_t &high) { if (IsHost()) return Platform::CalculateMD5(file_spec, low, high); if (m_remote_platform_sp) return m_remote_platform_sp->CalculateMD5(file_spec, low, high); return false; } const lldb::UnixSignalsSP &PlatformPOSIX::GetRemoteUnixSignals() { if (IsRemote() && m_remote_platform_sp) return m_remote_platform_sp->GetRemoteUnixSignals(); return Platform::GetRemoteUnixSignals(); } FileSpec PlatformPOSIX::GetRemoteWorkingDirectory() { if (IsRemote() && m_remote_platform_sp) return m_remote_platform_sp->GetRemoteWorkingDirectory(); else return Platform::GetRemoteWorkingDirectory(); } bool PlatformPOSIX::SetRemoteWorkingDirectory(const FileSpec &working_dir) { if (IsRemote() && m_remote_platform_sp) return m_remote_platform_sp->SetRemoteWorkingDirectory(working_dir); else return Platform::SetRemoteWorkingDirectory(working_dir); } bool PlatformPOSIX::GetRemoteOSVersion() { if (m_remote_platform_sp) return m_remote_platform_sp->GetOSVersion( m_major_os_version, m_minor_os_version, m_update_os_version); return false; } bool PlatformPOSIX::GetRemoteOSBuildString(std::string &s) { if (m_remote_platform_sp) return m_remote_platform_sp->GetRemoteOSBuildString(s); s.clear(); return false; } size_t PlatformPOSIX::GetEnvironment(StringList &env) { if (IsRemote()) { if (m_remote_platform_sp) return m_remote_platform_sp->GetEnvironment(env); return 0; } return Host::GetEnvironment(env); } bool PlatformPOSIX::GetRemoteOSKernelDescription(std::string &s) { if (m_remote_platform_sp) return m_remote_platform_sp->GetRemoteOSKernelDescription(s); s.clear(); return false; } // Remote Platform subclasses need to override this function ArchSpec PlatformPOSIX::GetRemoteSystemArchitecture() { if (m_remote_platform_sp) return m_remote_platform_sp->GetRemoteSystemArchitecture(); return ArchSpec(); } const char *PlatformPOSIX::GetHostname() { if (IsHost()) return Platform::GetHostname(); if (m_remote_platform_sp) return m_remote_platform_sp->GetHostname(); return NULL; } const char *PlatformPOSIX::GetUserName(uint32_t uid) { // Check the cache in Platform in case we have already looked this uid up const char *user_name = Platform::GetUserName(uid); if (user_name) return user_name; if (IsRemote() && m_remote_platform_sp) return m_remote_platform_sp->GetUserName(uid); return NULL; } const char *PlatformPOSIX::GetGroupName(uint32_t gid) { const char *group_name = Platform::GetGroupName(gid); if (group_name) return group_name; if (IsRemote() && m_remote_platform_sp) return m_remote_platform_sp->GetGroupName(gid); return NULL; } Status PlatformPOSIX::ConnectRemote(Args &args) { Status error; if (IsHost()) { error.SetErrorStringWithFormat( "can't connect to the host platform '%s', always connected", GetPluginName().GetCString()); } else { if (!m_remote_platform_sp) m_remote_platform_sp = Platform::Create(ConstString("remote-gdb-server"), error); if (m_remote_platform_sp && error.Success()) error = m_remote_platform_sp->ConnectRemote(args); else error.SetErrorString("failed to create a 'remote-gdb-server' platform"); if (error.Fail()) m_remote_platform_sp.reset(); } if (error.Success() && m_remote_platform_sp) { if (m_option_group_platform_rsync.get() && m_option_group_platform_ssh.get() && m_option_group_platform_caching.get()) { if (m_option_group_platform_rsync->m_rsync) { SetSupportsRSync(true); SetRSyncOpts(m_option_group_platform_rsync->m_rsync_opts.c_str()); SetRSyncPrefix(m_option_group_platform_rsync->m_rsync_prefix.c_str()); SetIgnoresRemoteHostname( m_option_group_platform_rsync->m_ignores_remote_hostname); } if (m_option_group_platform_ssh->m_ssh) { SetSupportsSSH(true); SetSSHOpts(m_option_group_platform_ssh->m_ssh_opts.c_str()); } SetLocalCacheDirectory( m_option_group_platform_caching->m_cache_dir.c_str()); } } return error; } Status PlatformPOSIX::DisconnectRemote() { Status error; if (IsHost()) { error.SetErrorStringWithFormat( "can't disconnect from the host platform '%s', always connected", GetPluginName().GetCString()); } else { if (m_remote_platform_sp) error = m_remote_platform_sp->DisconnectRemote(); else error.SetErrorString("the platform is not currently connected"); } return error; } Status PlatformPOSIX::LaunchProcess(ProcessLaunchInfo &launch_info) { Status error; if (IsHost()) { error = Platform::LaunchProcess(launch_info); } else { if (m_remote_platform_sp) error = m_remote_platform_sp->LaunchProcess(launch_info); else error.SetErrorString("the platform is not currently connected"); } return error; } lldb_private::Status PlatformPOSIX::KillProcess(const lldb::pid_t pid) { if (IsHost()) return Platform::KillProcess(pid); if (m_remote_platform_sp) return m_remote_platform_sp->KillProcess(pid); return Status("the platform is not currently connected"); } lldb::ProcessSP PlatformPOSIX::Attach(ProcessAttachInfo &attach_info, Debugger &debugger, Target *target, Status &error) { lldb::ProcessSP process_sp; Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); if (IsHost()) { if (target == NULL) { TargetSP new_target_sp; error = debugger.GetTargetList().CreateTarget(debugger, "", "", false, NULL, new_target_sp); target = new_target_sp.get(); if (log) log->Printf("PlatformPOSIX::%s created new target", __FUNCTION__); } else { error.Clear(); if (log) log->Printf("PlatformPOSIX::%s target already existed, setting target", __FUNCTION__); } if (target && error.Success()) { debugger.GetTargetList().SetSelectedTarget(target); if (log) { ModuleSP exe_module_sp = target->GetExecutableModule(); log->Printf("PlatformPOSIX::%s set selected target to %p %s", __FUNCTION__, (void *)target, exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str() : ""); } process_sp = target->CreateProcess(attach_info.GetListenerForProcess(debugger), attach_info.GetProcessPluginName(), NULL); if (process_sp) { ListenerSP listener_sp = attach_info.GetHijackListener(); if (listener_sp == nullptr) { listener_sp = Listener::MakeListener("lldb.PlatformPOSIX.attach.hijack"); attach_info.SetHijackListener(listener_sp); } process_sp->HijackProcessEvents(listener_sp); error = process_sp->Attach(attach_info); } } } else { if (m_remote_platform_sp) process_sp = m_remote_platform_sp->Attach(attach_info, debugger, target, error); else error.SetErrorString("the platform is not currently connected"); } return process_sp; } lldb::ProcessSP PlatformPOSIX::DebugProcess(ProcessLaunchInfo &launch_info, Debugger &debugger, Target *target, // Can be NULL, if NULL create a new // target, else use existing one Status &error) { ProcessSP process_sp; if (IsHost()) { // We are going to hand this process off to debugserver which will be in // charge of setting the exit status. // We still need to reap it from lldb but if we let the monitor thread also // set the exit status, we set up a // race between debugserver & us for who will find out about the debugged // process's death. launch_info.GetFlags().Set(eLaunchFlagDontSetExitStatus); process_sp = Platform::DebugProcess(launch_info, debugger, target, error); } else { if (m_remote_platform_sp) process_sp = m_remote_platform_sp->DebugProcess(launch_info, debugger, target, error); else error.SetErrorString("the platform is not currently connected"); } return process_sp; } void PlatformPOSIX::CalculateTrapHandlerSymbolNames() { m_trap_handlers.push_back(ConstString("_sigtramp")); } Status PlatformPOSIX::EvaluateLibdlExpression( lldb_private::Process *process, const char *expr_cstr, const char *expr_prefix, lldb::ValueObjectSP &result_valobj_sp) { DynamicLoader *loader = process->GetDynamicLoader(); if (loader) { Status error = loader->CanLoadImage(); if (error.Fail()) return error; } ThreadSP thread_sp(process->GetThreadList().GetExpressionExecutionThread()); if (!thread_sp) return Status("Selected thread isn't valid"); StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); if (!frame_sp) return Status("Frame 0 isn't valid"); ExecutionContext exe_ctx; frame_sp->CalculateExecutionContext(exe_ctx); EvaluateExpressionOptions expr_options; expr_options.SetUnwindOnError(true); expr_options.SetIgnoreBreakpoints(true); expr_options.SetExecutionPolicy(eExecutionPolicyAlways); expr_options.SetLanguage(eLanguageTypeC_plus_plus); expr_options.SetTrapExceptions(false); // dlopen can't throw exceptions, so // don't do the work to trap them. expr_options.SetTimeout(std::chrono::seconds(2)); Status expr_error; ExpressionResults result = UserExpression::Evaluate(exe_ctx, expr_options, expr_cstr, expr_prefix, result_valobj_sp, expr_error); if (result != eExpressionCompleted) return expr_error; if (result_valobj_sp->GetError().Fail()) return result_valobj_sp->GetError(); return Status(); } uint32_t PlatformPOSIX::DoLoadImage(lldb_private::Process *process, const lldb_private::FileSpec &remote_file, lldb_private::Status &error) { char path[PATH_MAX]; remote_file.GetPath(path, sizeof(path)); StreamString expr; expr.Printf(R"( struct __lldb_dlopen_result { void *image_ptr; const char *error_str; } the_result; the_result.image_ptr = dlopen ("%s", 2); if (the_result.image_ptr == (void *) 0x0) { the_result.error_str = dlerror(); } else { the_result.error_str = (const char *) 0x0; } the_result; )", path); const char *prefix = GetLibdlFunctionDeclarations(); lldb::ValueObjectSP result_valobj_sp; error = EvaluateLibdlExpression(process, expr.GetData(), prefix, result_valobj_sp); if (error.Fail()) return LLDB_INVALID_IMAGE_TOKEN; error = result_valobj_sp->GetError(); if (error.Fail()) return LLDB_INVALID_IMAGE_TOKEN; Scalar scalar; ValueObjectSP image_ptr_sp = result_valobj_sp->GetChildAtIndex(0, true); if (!image_ptr_sp || !image_ptr_sp->ResolveValue(scalar)) { error.SetErrorStringWithFormat("unable to load '%s'", path); return LLDB_INVALID_IMAGE_TOKEN; } addr_t image_ptr = scalar.ULongLong(LLDB_INVALID_ADDRESS); if (image_ptr != 0 && image_ptr != LLDB_INVALID_ADDRESS) return process->AddImageToken(image_ptr); if (image_ptr == 0) { ValueObjectSP error_str_sp = result_valobj_sp->GetChildAtIndex(1, true); if (error_str_sp) { DataBufferSP buffer_sp(new DataBufferHeap(10240, 0)); size_t num_chars = error_str_sp->ReadPointedString(buffer_sp, error, 10240).first; if (error.Success() && num_chars > 0) error.SetErrorStringWithFormat("dlopen error: %s", buffer_sp->GetBytes()); else error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); return LLDB_INVALID_IMAGE_TOKEN; } } error.SetErrorStringWithFormat("unable to load '%s'", path); return LLDB_INVALID_IMAGE_TOKEN; } Status PlatformPOSIX::UnloadImage(lldb_private::Process *process, uint32_t image_token) { const addr_t image_addr = process->GetImagePtrFromToken(image_token); if (image_addr == LLDB_INVALID_ADDRESS) return Status("Invalid image token"); StreamString expr; expr.Printf("dlclose((void *)0x%" PRIx64 ")", image_addr); const char *prefix = GetLibdlFunctionDeclarations(); lldb::ValueObjectSP result_valobj_sp; Status error = EvaluateLibdlExpression(process, expr.GetData(), prefix, result_valobj_sp); if (error.Fail()) return error; if (result_valobj_sp->GetError().Fail()) return result_valobj_sp->GetError(); Scalar scalar; if (result_valobj_sp->ResolveValue(scalar)) { if (scalar.UInt(1)) return Status("expression failed: \"%s\"", expr.GetData()); process->ResetImageToken(image_token); } return Status(); } lldb::ProcessSP PlatformPOSIX::ConnectProcess(llvm::StringRef connect_url, llvm::StringRef plugin_name, lldb_private::Debugger &debugger, lldb_private::Target *target, lldb_private::Status &error) { if (m_remote_platform_sp) return m_remote_platform_sp->ConnectProcess(connect_url, plugin_name, debugger, target, error); return Platform::ConnectProcess(connect_url, plugin_name, debugger, target, error); } const char *PlatformPOSIX::GetLibdlFunctionDeclarations() const { return R"( extern "C" void* dlopen(const char*, int); extern "C" void* dlsym(void*, const char*); extern "C" int dlclose(void*); extern "C" char* dlerror(void); )"; } size_t PlatformPOSIX::ConnectToWaitingProcesses(Debugger &debugger, Status &error) { if (m_remote_platform_sp) return m_remote_platform_sp->ConnectToWaitingProcesses(debugger, error); return Platform::ConnectToWaitingProcesses(debugger, error); } ConstString PlatformPOSIX::GetFullNameForDylib(ConstString basename) { if (basename.IsEmpty()) return basename; StreamString stream; stream.Printf("lib%s.so", basename.GetCString()); return ConstString(stream.GetString()); }