| File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp |
| Warning: | line 650, column 3 Value stored to 'do_dlopen_function' is never read |
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| 1 | //===-- PlatformPOSIX.cpp -------------------------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "PlatformPOSIX.h" |
| 10 | |
| 11 | #include "Plugins/Platform/gdb-server/PlatformRemoteGDBServer.h" |
| 12 | #include "Plugins/TypeSystem/Clang/TypeSystemClang.h" |
| 13 | #include "lldb/Core/Debugger.h" |
| 14 | #include "lldb/Core/Module.h" |
| 15 | #include "lldb/Core/ValueObject.h" |
| 16 | #include "lldb/Expression/DiagnosticManager.h" |
| 17 | #include "lldb/Expression/FunctionCaller.h" |
| 18 | #include "lldb/Expression/UserExpression.h" |
| 19 | #include "lldb/Expression/UtilityFunction.h" |
| 20 | #include "lldb/Host/File.h" |
| 21 | #include "lldb/Host/FileCache.h" |
| 22 | #include "lldb/Host/FileSystem.h" |
| 23 | #include "lldb/Host/Host.h" |
| 24 | #include "lldb/Host/HostInfo.h" |
| 25 | #include "lldb/Host/ProcessLaunchInfo.h" |
| 26 | #include "lldb/Target/DynamicLoader.h" |
| 27 | #include "lldb/Target/ExecutionContext.h" |
| 28 | #include "lldb/Target/Process.h" |
| 29 | #include "lldb/Target/Thread.h" |
| 30 | #include "lldb/Utility/DataBufferHeap.h" |
| 31 | #include "lldb/Utility/FileSpec.h" |
| 32 | #include "lldb/Utility/LLDBLog.h" |
| 33 | #include "lldb/Utility/Log.h" |
| 34 | #include "lldb/Utility/StreamString.h" |
| 35 | #include "llvm/ADT/ScopeExit.h" |
| 36 | |
| 37 | using namespace lldb; |
| 38 | using namespace lldb_private; |
| 39 | |
| 40 | /// Default Constructor |
| 41 | PlatformPOSIX::PlatformPOSIX(bool is_host) |
| 42 | : RemoteAwarePlatform(is_host), // This is the local host platform |
| 43 | m_option_group_platform_rsync(new OptionGroupPlatformRSync()), |
| 44 | m_option_group_platform_ssh(new OptionGroupPlatformSSH()), |
| 45 | m_option_group_platform_caching(new OptionGroupPlatformCaching()) {} |
| 46 | |
| 47 | /// Destructor. |
| 48 | /// |
| 49 | /// The destructor is virtual since this class is designed to be |
| 50 | /// inherited from by the plug-in instance. |
| 51 | PlatformPOSIX::~PlatformPOSIX() = default; |
| 52 | |
| 53 | lldb_private::OptionGroupOptions *PlatformPOSIX::GetConnectionOptions( |
| 54 | lldb_private::CommandInterpreter &interpreter) { |
| 55 | auto iter = m_options.find(&interpreter), end = m_options.end(); |
| 56 | if (iter == end) { |
| 57 | std::unique_ptr<lldb_private::OptionGroupOptions> options( |
| 58 | new OptionGroupOptions()); |
| 59 | options->Append(m_option_group_platform_rsync.get()); |
| 60 | options->Append(m_option_group_platform_ssh.get()); |
| 61 | options->Append(m_option_group_platform_caching.get()); |
| 62 | m_options[&interpreter] = std::move(options); |
| 63 | } |
| 64 | |
| 65 | return m_options.at(&interpreter).get(); |
| 66 | } |
| 67 | |
| 68 | static uint32_t chown_file(Platform *platform, const char *path, |
| 69 | uint32_t uid = UINT32_MAX(4294967295U), |
| 70 | uint32_t gid = UINT32_MAX(4294967295U)) { |
| 71 | if (!platform || !path || *path == 0) |
| 72 | return UINT32_MAX(4294967295U); |
| 73 | |
| 74 | if (uid == UINT32_MAX(4294967295U) && gid == UINT32_MAX(4294967295U)) |
| 75 | return 0; // pretend I did chown correctly - actually I just didn't care |
| 76 | |
| 77 | StreamString command; |
| 78 | command.PutCString("chown "); |
| 79 | if (uid != UINT32_MAX(4294967295U)) |
| 80 | command.Printf("%d", uid); |
| 81 | if (gid != UINT32_MAX(4294967295U)) |
| 82 | command.Printf(":%d", gid); |
| 83 | command.Printf("%s", path); |
| 84 | int status; |
| 85 | platform->RunShellCommand(command.GetData(), FileSpec(), &status, nullptr, |
| 86 | nullptr, std::chrono::seconds(10)); |
| 87 | return status; |
| 88 | } |
| 89 | |
| 90 | lldb_private::Status |
| 91 | PlatformPOSIX::PutFile(const lldb_private::FileSpec &source, |
| 92 | const lldb_private::FileSpec &destination, uint32_t uid, |
| 93 | uint32_t gid) { |
| 94 | Log *log = GetLog(LLDBLog::Platform); |
| 95 | |
| 96 | if (IsHost()) { |
| 97 | if (source == destination) |
| 98 | return Status(); |
| 99 | // cp src dst |
| 100 | // chown uid:gid dst |
| 101 | std::string src_path(source.GetPath()); |
| 102 | if (src_path.empty()) |
| 103 | return Status("unable to get file path for source"); |
| 104 | std::string dst_path(destination.GetPath()); |
| 105 | if (dst_path.empty()) |
| 106 | return Status("unable to get file path for destination"); |
| 107 | StreamString command; |
| 108 | command.Printf("cp %s %s", src_path.c_str(), dst_path.c_str()); |
| 109 | int status; |
| 110 | RunShellCommand(command.GetData(), FileSpec(), &status, nullptr, nullptr, |
| 111 | std::chrono::seconds(10)); |
| 112 | if (status != 0) |
| 113 | return Status("unable to perform copy"); |
| 114 | if (uid == UINT32_MAX(4294967295U) && gid == UINT32_MAX(4294967295U)) |
| 115 | return Status(); |
| 116 | if (chown_file(this, dst_path.c_str(), uid, gid) != 0) |
| 117 | return Status("unable to perform chown"); |
| 118 | return Status(); |
| 119 | } else if (m_remote_platform_sp) { |
| 120 | if (GetSupportsRSync()) { |
| 121 | std::string src_path(source.GetPath()); |
| 122 | if (src_path.empty()) |
| 123 | return Status("unable to get file path for source"); |
| 124 | std::string dst_path(destination.GetPath()); |
| 125 | if (dst_path.empty()) |
| 126 | return Status("unable to get file path for destination"); |
| 127 | StreamString command; |
| 128 | if (GetIgnoresRemoteHostname()) { |
| 129 | if (!GetRSyncPrefix()) |
| 130 | command.Printf("rsync %s %s %s", GetRSyncOpts(), src_path.c_str(), |
| 131 | dst_path.c_str()); |
| 132 | else |
| 133 | command.Printf("rsync %s %s %s%s", GetRSyncOpts(), src_path.c_str(), |
| 134 | GetRSyncPrefix(), dst_path.c_str()); |
| 135 | } else |
| 136 | command.Printf("rsync %s %s %s:%s", GetRSyncOpts(), src_path.c_str(), |
| 137 | GetHostname(), dst_path.c_str()); |
| 138 | LLDB_LOGF(log, "[PutFile] Running command: %s\n", command.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("[PutFile] Running command: %s\n", command .GetData()); } while (0); |
| 139 | int retcode; |
| 140 | Host::RunShellCommand(command.GetData(), FileSpec(), &retcode, nullptr, |
| 141 | nullptr, std::chrono::minutes(1)); |
| 142 | if (retcode == 0) { |
| 143 | // Don't chown a local file for a remote system |
| 144 | // if (chown_file(this,dst_path.c_str(),uid,gid) != 0) |
| 145 | // return Status("unable to perform chown"); |
| 146 | return Status(); |
| 147 | } |
| 148 | // if we are still here rsync has failed - let's try the slow way before |
| 149 | // giving up |
| 150 | } |
| 151 | } |
| 152 | return Platform::PutFile(source, destination, uid, gid); |
| 153 | } |
| 154 | |
| 155 | lldb_private::Status PlatformPOSIX::GetFile( |
| 156 | const lldb_private::FileSpec &source, // remote file path |
| 157 | const lldb_private::FileSpec &destination) // local file path |
| 158 | { |
| 159 | Log *log = GetLog(LLDBLog::Platform); |
| 160 | |
| 161 | // Check the args, first. |
| 162 | std::string src_path(source.GetPath()); |
| 163 | if (src_path.empty()) |
| 164 | return Status("unable to get file path for source"); |
| 165 | std::string dst_path(destination.GetPath()); |
| 166 | if (dst_path.empty()) |
| 167 | return Status("unable to get file path for destination"); |
| 168 | if (IsHost()) { |
| 169 | if (source == destination) |
| 170 | return Status("local scenario->source and destination are the same file " |
| 171 | "path: no operation performed"); |
| 172 | // cp src dst |
| 173 | StreamString cp_command; |
| 174 | cp_command.Printf("cp %s %s", src_path.c_str(), dst_path.c_str()); |
| 175 | int status; |
| 176 | RunShellCommand(cp_command.GetData(), FileSpec(), &status, nullptr, nullptr, |
| 177 | std::chrono::seconds(10)); |
| 178 | if (status != 0) |
| 179 | return Status("unable to perform copy"); |
| 180 | return Status(); |
| 181 | } else if (m_remote_platform_sp) { |
| 182 | if (GetSupportsRSync()) { |
| 183 | StreamString command; |
| 184 | if (GetIgnoresRemoteHostname()) { |
| 185 | if (!GetRSyncPrefix()) |
| 186 | command.Printf("rsync %s %s %s", GetRSyncOpts(), src_path.c_str(), |
| 187 | dst_path.c_str()); |
| 188 | else |
| 189 | command.Printf("rsync %s %s%s %s", GetRSyncOpts(), GetRSyncPrefix(), |
| 190 | src_path.c_str(), dst_path.c_str()); |
| 191 | } else |
| 192 | command.Printf("rsync %s %s:%s %s", GetRSyncOpts(), |
| 193 | m_remote_platform_sp->GetHostname(), src_path.c_str(), |
| 194 | dst_path.c_str()); |
| 195 | LLDB_LOGF(log, "[GetFile] Running command: %s\n", command.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("[GetFile] Running command: %s\n", command .GetData()); } while (0); |
| 196 | int retcode; |
| 197 | Host::RunShellCommand(command.GetData(), FileSpec(), &retcode, nullptr, |
| 198 | nullptr, std::chrono::minutes(1)); |
| 199 | if (retcode == 0) |
| 200 | return Status(); |
| 201 | // If we are here, rsync has failed - let's try the slow way before |
| 202 | // giving up |
| 203 | } |
| 204 | // open src and dst |
| 205 | // read/write, read/write, read/write, ... |
| 206 | // close src |
| 207 | // close dst |
| 208 | LLDB_LOGF(log, "[GetFile] Using block by block transfer....\n")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("[GetFile] Using block by block transfer....\n" ); } while (0); |
| 209 | Status error; |
| 210 | user_id_t fd_src = OpenFile(source, File::eOpenOptionReadOnly, |
| 211 | lldb::eFilePermissionsFileDefault, error); |
| 212 | |
| 213 | if (fd_src == UINT64_MAX(18446744073709551615UL)) |
| 214 | return Status("unable to open source file"); |
| 215 | |
| 216 | uint32_t permissions = 0; |
| 217 | error = GetFilePermissions(source, permissions); |
| 218 | |
| 219 | if (permissions == 0) |
| 220 | permissions = lldb::eFilePermissionsFileDefault; |
| 221 | |
| 222 | user_id_t fd_dst = FileCache::GetInstance().OpenFile( |
| 223 | destination, File::eOpenOptionCanCreate | File::eOpenOptionWriteOnly | |
| 224 | File::eOpenOptionTruncate, |
| 225 | permissions, error); |
| 226 | |
| 227 | if (fd_dst == UINT64_MAX(18446744073709551615UL)) { |
| 228 | if (error.Success()) |
| 229 | error.SetErrorString("unable to open destination file"); |
| 230 | } |
| 231 | |
| 232 | if (error.Success()) { |
| 233 | lldb::WritableDataBufferSP buffer_sp(new DataBufferHeap(1024, 0)); |
| 234 | uint64_t offset = 0; |
| 235 | error.Clear(); |
| 236 | while (error.Success()) { |
| 237 | const uint64_t n_read = ReadFile(fd_src, offset, buffer_sp->GetBytes(), |
| 238 | buffer_sp->GetByteSize(), error); |
| 239 | if (error.Fail()) |
| 240 | break; |
| 241 | if (n_read == 0) |
| 242 | break; |
| 243 | if (FileCache::GetInstance().WriteFile(fd_dst, offset, |
| 244 | buffer_sp->GetBytes(), n_read, |
| 245 | error) != n_read) { |
| 246 | if (!error.Fail()) |
| 247 | error.SetErrorString("unable to write to destination file"); |
| 248 | break; |
| 249 | } |
| 250 | offset += n_read; |
| 251 | } |
| 252 | } |
| 253 | // Ignore the close error of src. |
| 254 | if (fd_src != UINT64_MAX(18446744073709551615UL)) |
| 255 | CloseFile(fd_src, error); |
| 256 | // And close the dst file descriptot. |
| 257 | if (fd_dst != UINT64_MAX(18446744073709551615UL) && |
| 258 | !FileCache::GetInstance().CloseFile(fd_dst, error)) { |
| 259 | if (!error.Fail()) |
| 260 | error.SetErrorString("unable to close destination file"); |
| 261 | } |
| 262 | return error; |
| 263 | } |
| 264 | return Platform::GetFile(source, destination); |
| 265 | } |
| 266 | |
| 267 | std::string PlatformPOSIX::GetPlatformSpecificConnectionInformation() { |
| 268 | StreamString stream; |
| 269 | if (GetSupportsRSync()) { |
| 270 | stream.PutCString("rsync"); |
| 271 | if ((GetRSyncOpts() && *GetRSyncOpts()) || |
| 272 | (GetRSyncPrefix() && *GetRSyncPrefix()) || GetIgnoresRemoteHostname()) { |
| 273 | stream.Printf(", options: "); |
| 274 | if (GetRSyncOpts() && *GetRSyncOpts()) |
| 275 | stream.Printf("'%s' ", GetRSyncOpts()); |
| 276 | stream.Printf(", prefix: "); |
| 277 | if (GetRSyncPrefix() && *GetRSyncPrefix()) |
| 278 | stream.Printf("'%s' ", GetRSyncPrefix()); |
| 279 | if (GetIgnoresRemoteHostname()) |
| 280 | stream.Printf("ignore remote-hostname "); |
| 281 | } |
| 282 | } |
| 283 | if (GetSupportsSSH()) { |
| 284 | stream.PutCString("ssh"); |
| 285 | if (GetSSHOpts() && *GetSSHOpts()) |
| 286 | stream.Printf(", options: '%s' ", GetSSHOpts()); |
| 287 | } |
| 288 | if (GetLocalCacheDirectory() && *GetLocalCacheDirectory()) |
| 289 | stream.Printf("cache dir: %s", GetLocalCacheDirectory()); |
| 290 | if (stream.GetSize()) |
| 291 | return std::string(stream.GetString()); |
| 292 | else |
| 293 | return ""; |
| 294 | } |
| 295 | |
| 296 | const lldb::UnixSignalsSP &PlatformPOSIX::GetRemoteUnixSignals() { |
| 297 | if (IsRemote() && m_remote_platform_sp) |
| 298 | return m_remote_platform_sp->GetRemoteUnixSignals(); |
| 299 | return Platform::GetRemoteUnixSignals(); |
| 300 | } |
| 301 | |
| 302 | Status PlatformPOSIX::ConnectRemote(Args &args) { |
| 303 | Status error; |
| 304 | if (IsHost()) { |
| 305 | error.SetErrorStringWithFormatv( |
| 306 | "can't connect to the host platform '{0}', always connected", |
| 307 | GetPluginName()); |
| 308 | } else { |
| 309 | if (!m_remote_platform_sp) |
| 310 | m_remote_platform_sp = |
| 311 | platform_gdb_server::PlatformRemoteGDBServer::CreateInstance( |
| 312 | /*force=*/true, nullptr); |
| 313 | |
| 314 | if (m_remote_platform_sp && error.Success()) |
| 315 | error = m_remote_platform_sp->ConnectRemote(args); |
| 316 | else |
| 317 | error.SetErrorString("failed to create a 'remote-gdb-server' platform"); |
| 318 | |
| 319 | if (error.Fail()) |
| 320 | m_remote_platform_sp.reset(); |
| 321 | } |
| 322 | |
| 323 | if (error.Success() && m_remote_platform_sp) { |
| 324 | if (m_option_group_platform_rsync.get() && |
| 325 | m_option_group_platform_ssh.get() && |
| 326 | m_option_group_platform_caching.get()) { |
| 327 | if (m_option_group_platform_rsync->m_rsync) { |
| 328 | SetSupportsRSync(true); |
| 329 | SetRSyncOpts(m_option_group_platform_rsync->m_rsync_opts.c_str()); |
| 330 | SetRSyncPrefix(m_option_group_platform_rsync->m_rsync_prefix.c_str()); |
| 331 | SetIgnoresRemoteHostname( |
| 332 | m_option_group_platform_rsync->m_ignores_remote_hostname); |
| 333 | } |
| 334 | if (m_option_group_platform_ssh->m_ssh) { |
| 335 | SetSupportsSSH(true); |
| 336 | SetSSHOpts(m_option_group_platform_ssh->m_ssh_opts.c_str()); |
| 337 | } |
| 338 | SetLocalCacheDirectory( |
| 339 | m_option_group_platform_caching->m_cache_dir.c_str()); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | return error; |
| 344 | } |
| 345 | |
| 346 | Status PlatformPOSIX::DisconnectRemote() { |
| 347 | Status error; |
| 348 | |
| 349 | if (IsHost()) { |
| 350 | error.SetErrorStringWithFormatv( |
| 351 | "can't disconnect from the host platform '{0}', always connected", |
| 352 | GetPluginName()); |
| 353 | } else { |
| 354 | if (m_remote_platform_sp) |
| 355 | error = m_remote_platform_sp->DisconnectRemote(); |
| 356 | else |
| 357 | error.SetErrorString("the platform is not currently connected"); |
| 358 | } |
| 359 | return error; |
| 360 | } |
| 361 | |
| 362 | lldb::ProcessSP PlatformPOSIX::Attach(ProcessAttachInfo &attach_info, |
| 363 | Debugger &debugger, Target *target, |
| 364 | Status &error) { |
| 365 | lldb::ProcessSP process_sp; |
| 366 | Log *log = GetLog(LLDBLog::Platform); |
| 367 | |
| 368 | if (IsHost()) { |
| 369 | if (target == nullptr) { |
| 370 | TargetSP new_target_sp; |
| 371 | |
| 372 | error = debugger.GetTargetList().CreateTarget( |
| 373 | debugger, "", "", eLoadDependentsNo, nullptr, new_target_sp); |
| 374 | target = new_target_sp.get(); |
| 375 | LLDB_LOGF(log, "PlatformPOSIX::%s created new target", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s created new target" , __FUNCTION__); } while (0); |
| 376 | } else { |
| 377 | error.Clear(); |
| 378 | LLDB_LOGF(log, "PlatformPOSIX::%s target already existed, setting target",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s target already existed, setting target" , __FUNCTION__); } while (0) |
| 379 | __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s target already existed, setting target" , __FUNCTION__); } while (0); |
| 380 | } |
| 381 | |
| 382 | if (target && error.Success()) { |
| 383 | if (log) { |
| 384 | ModuleSP exe_module_sp = target->GetExecutableModule(); |
| 385 | LLDB_LOGF(log, "PlatformPOSIX::%s set selected target to %p %s",do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s set selected target to %p %s" , __FUNCTION__, (void *)target, exe_module_sp ? exe_module_sp ->GetFileSpec().GetPath().c_str() : "<null>"); } while (0) |
| 386 | __FUNCTION__, (void *)target,do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s set selected target to %p %s" , __FUNCTION__, (void *)target, exe_module_sp ? exe_module_sp ->GetFileSpec().GetPath().c_str() : "<null>"); } while (0) |
| 387 | exe_module_sp ? exe_module_sp->GetFileSpec().GetPath().c_str()do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s set selected target to %p %s" , __FUNCTION__, (void *)target, exe_module_sp ? exe_module_sp ->GetFileSpec().GetPath().c_str() : "<null>"); } while (0) |
| 388 | : "<null>")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Printf("PlatformPOSIX::%s set selected target to %p %s" , __FUNCTION__, (void *)target, exe_module_sp ? exe_module_sp ->GetFileSpec().GetPath().c_str() : "<null>"); } while (0); |
| 389 | } |
| 390 | |
| 391 | process_sp = |
| 392 | target->CreateProcess(attach_info.GetListenerForProcess(debugger), |
| 393 | "gdb-remote", nullptr, true); |
| 394 | |
| 395 | if (process_sp) { |
| 396 | ListenerSP listener_sp = attach_info.GetHijackListener(); |
| 397 | if (listener_sp == nullptr) { |
| 398 | listener_sp = |
| 399 | Listener::MakeListener("lldb.PlatformPOSIX.attach.hijack"); |
| 400 | attach_info.SetHijackListener(listener_sp); |
| 401 | } |
| 402 | process_sp->HijackProcessEvents(listener_sp); |
| 403 | error = process_sp->Attach(attach_info); |
| 404 | } |
| 405 | } |
| 406 | } else { |
| 407 | if (m_remote_platform_sp) |
| 408 | process_sp = |
| 409 | m_remote_platform_sp->Attach(attach_info, debugger, target, error); |
| 410 | else |
| 411 | error.SetErrorString("the platform is not currently connected"); |
| 412 | } |
| 413 | return process_sp; |
| 414 | } |
| 415 | |
| 416 | lldb::ProcessSP PlatformPOSIX::DebugProcess(ProcessLaunchInfo &launch_info, |
| 417 | Debugger &debugger, Target &target, |
| 418 | Status &error) { |
| 419 | Log *log = GetLog(LLDBLog::Platform); |
| 420 | LLDB_LOG(log, "target {0}", &target)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "target {0}", &target); } while (0); |
| 421 | |
| 422 | ProcessSP process_sp; |
| 423 | |
| 424 | if (!IsHost()) { |
| 425 | if (m_remote_platform_sp) |
| 426 | process_sp = m_remote_platform_sp->DebugProcess(launch_info, debugger, |
| 427 | target, error); |
| 428 | else |
| 429 | error.SetErrorString("the platform is not currently connected"); |
| 430 | return process_sp; |
| 431 | } |
| 432 | |
| 433 | // |
| 434 | // For local debugging, we'll insist on having ProcessGDBRemote create the |
| 435 | // process. |
| 436 | // |
| 437 | |
| 438 | // Make sure we stop at the entry point |
| 439 | launch_info.GetFlags().Set(eLaunchFlagDebug); |
| 440 | |
| 441 | // We always launch the process we are going to debug in a separate process |
| 442 | // group, since then we can handle ^C interrupts ourselves w/o having to |
| 443 | // worry about the target getting them as well. |
| 444 | launch_info.SetLaunchInSeparateProcessGroup(true); |
| 445 | |
| 446 | // Now create the gdb-remote process. |
| 447 | LLDB_LOG(log, "having target create process with gdb-remote plugin")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "having target create process with gdb-remote plugin" ); } while (0); |
| 448 | process_sp = target.CreateProcess(launch_info.GetListener(), "gdb-remote", |
| 449 | nullptr, true); |
| 450 | |
| 451 | if (!process_sp) { |
| 452 | error.SetErrorString("CreateProcess() failed for gdb-remote process"); |
| 453 | LLDB_LOG(log, "error: {0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "error: {0}", error); } while (0); |
| 454 | return process_sp; |
| 455 | } |
| 456 | |
| 457 | LLDB_LOG(log, "successfully created process")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "successfully created process"); } while (0); |
| 458 | |
| 459 | process_sp->HijackProcessEvents(launch_info.GetHijackListener()); |
| 460 | |
| 461 | // Log file actions. |
| 462 | if (log) { |
| 463 | LLDB_LOG(log, "launching process with the following file actions:")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "launching process with the following file actions:" ); } while (0); |
| 464 | StreamString stream; |
| 465 | size_t i = 0; |
| 466 | const FileAction *file_action; |
| 467 | while ((file_action = launch_info.GetFileActionAtIndex(i++)) != nullptr) { |
| 468 | file_action->Dump(stream); |
| 469 | LLDB_LOG(log, "{0}", stream.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "{0}", stream.GetData()); } while (0); |
| 470 | stream.Clear(); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | // Do the launch. |
| 475 | error = process_sp->Launch(launch_info); |
| 476 | if (error.Success()) { |
| 477 | // Hook up process PTY if we have one (which we should for local debugging |
| 478 | // with llgs). |
| 479 | int pty_fd = launch_info.GetPTY().ReleasePrimaryFileDescriptor(); |
| 480 | if (pty_fd != PseudoTerminal::invalid_fd) { |
| 481 | process_sp->SetSTDIOFileDescriptor(pty_fd); |
| 482 | LLDB_LOG(log, "hooked up STDIO pty to process")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "hooked up STDIO pty to process"); } while (0); |
| 483 | } else |
| 484 | LLDB_LOG(log, "not using process STDIO pty")do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "not using process STDIO pty"); } while (0); |
| 485 | } else { |
| 486 | LLDB_LOG(log, "{0}", error)do { ::lldb_private::Log *log_private = (log); if (log_private ) log_private->Format("lldb/source/Plugins/Platform/POSIX/PlatformPOSIX.cpp" , __func__, "{0}", error); } while (0); |
| 487 | // FIXME figure out appropriate cleanup here. Do we delete the process? |
| 488 | // Does our caller do that? |
| 489 | } |
| 490 | |
| 491 | return process_sp; |
| 492 | } |
| 493 | |
| 494 | void PlatformPOSIX::CalculateTrapHandlerSymbolNames() { |
| 495 | m_trap_handlers.push_back(ConstString("_sigtramp")); |
| 496 | } |
| 497 | |
| 498 | Status PlatformPOSIX::EvaluateLibdlExpression( |
| 499 | lldb_private::Process *process, const char *expr_cstr, |
| 500 | llvm::StringRef expr_prefix, lldb::ValueObjectSP &result_valobj_sp) { |
| 501 | DynamicLoader *loader = process->GetDynamicLoader(); |
| 502 | if (loader) { |
| 503 | Status error = loader->CanLoadImage(); |
| 504 | if (error.Fail()) |
| 505 | return error; |
| 506 | } |
| 507 | |
| 508 | ThreadSP thread_sp(process->GetThreadList().GetExpressionExecutionThread()); |
| 509 | if (!thread_sp) |
| 510 | return Status("Selected thread isn't valid"); |
| 511 | |
| 512 | StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); |
| 513 | if (!frame_sp) |
| 514 | return Status("Frame 0 isn't valid"); |
| 515 | |
| 516 | ExecutionContext exe_ctx; |
| 517 | frame_sp->CalculateExecutionContext(exe_ctx); |
| 518 | EvaluateExpressionOptions expr_options; |
| 519 | expr_options.SetUnwindOnError(true); |
| 520 | expr_options.SetIgnoreBreakpoints(true); |
| 521 | expr_options.SetExecutionPolicy(eExecutionPolicyAlways); |
| 522 | expr_options.SetLanguage(eLanguageTypeC_plus_plus); |
| 523 | expr_options.SetTrapExceptions(false); // dlopen can't throw exceptions, so |
| 524 | // don't do the work to trap them. |
| 525 | expr_options.SetTimeout(process->GetUtilityExpressionTimeout()); |
| 526 | |
| 527 | Status expr_error; |
| 528 | ExpressionResults result = |
| 529 | UserExpression::Evaluate(exe_ctx, expr_options, expr_cstr, expr_prefix, |
| 530 | result_valobj_sp, expr_error); |
| 531 | if (result != eExpressionCompleted) |
| 532 | return expr_error; |
| 533 | |
| 534 | if (result_valobj_sp->GetError().Fail()) |
| 535 | return result_valobj_sp->GetError(); |
| 536 | return Status(); |
| 537 | } |
| 538 | |
| 539 | std::unique_ptr<UtilityFunction> |
| 540 | PlatformPOSIX::MakeLoadImageUtilityFunction(ExecutionContext &exe_ctx, |
| 541 | Status &error) { |
| 542 | // Remember to prepend this with the prefix from |
| 543 | // GetLibdlFunctionDeclarations. The returned values are all in |
| 544 | // __lldb_dlopen_result for consistency. The wrapper returns a void * but |
| 545 | // doesn't use it because UtilityFunctions don't work with void returns at |
| 546 | // present. |
| 547 | // |
| 548 | // Use lazy binding so as to not make dlopen()'s success conditional on |
| 549 | // forcing every symbol in the library. |
| 550 | // |
| 551 | // In general, the debugger should allow programs to load & run with |
| 552 | // libraries as far as they can, instead of defaulting to being super-picky |
| 553 | // about unavailable symbols. |
| 554 | // |
| 555 | // The value "1" appears to imply lazy binding (RTLD_LAZY) on both Darwin |
| 556 | // and other POSIX OSes. |
| 557 | static const char *dlopen_wrapper_code = R"( |
| 558 | const int RTLD_LAZY = 1; |
| 559 | |
| 560 | struct __lldb_dlopen_result { |
| 561 | void *image_ptr; |
| 562 | const char *error_str; |
| 563 | }; |
| 564 | |
| 565 | extern "C" void *memcpy(void *, const void *, size_t size); |
| 566 | extern "C" size_t strlen(const char *); |
| 567 | |
| 568 | |
| 569 | void * __lldb_dlopen_wrapper (const char *name, |
| 570 | const char *path_strings, |
| 571 | char *buffer, |
| 572 | __lldb_dlopen_result *result_ptr) |
| 573 | { |
| 574 | // This is the case where the name is the full path: |
| 575 | if (!path_strings) { |
| 576 | result_ptr->image_ptr = dlopen(name, RTLD_LAZY); |
| 577 | if (result_ptr->image_ptr) |
| 578 | result_ptr->error_str = nullptr; |
| 579 | else |
| 580 | result_ptr->error_str = dlerror(); |
| 581 | return nullptr; |
| 582 | } |
| 583 | |
| 584 | // This is the case where we have a list of paths: |
| 585 | size_t name_len = strlen(name); |
| 586 | while (path_strings && path_strings[0] != '\0') { |
| 587 | size_t path_len = strlen(path_strings); |
| 588 | memcpy((void *) buffer, (void *) path_strings, path_len); |
| 589 | buffer[path_len] = '/'; |
| 590 | char *target_ptr = buffer+path_len+1; |
| 591 | memcpy((void *) target_ptr, (void *) name, name_len + 1); |
| 592 | result_ptr->image_ptr = dlopen(buffer, RTLD_LAZY); |
| 593 | if (result_ptr->image_ptr) { |
| 594 | result_ptr->error_str = nullptr; |
| 595 | break; |
| 596 | } |
| 597 | result_ptr->error_str = dlerror(); |
| 598 | path_strings = path_strings + path_len + 1; |
| 599 | } |
| 600 | return nullptr; |
| 601 | } |
| 602 | )"; |
| 603 | |
| 604 | static const char *dlopen_wrapper_name = "__lldb_dlopen_wrapper"; |
| 605 | Process *process = exe_ctx.GetProcessSP().get(); |
| 606 | // Insert the dlopen shim defines into our generic expression: |
| 607 | std::string expr(std::string(GetLibdlFunctionDeclarations(process))); |
| 608 | expr.append(dlopen_wrapper_code); |
| 609 | Status utility_error; |
| 610 | DiagnosticManager diagnostics; |
| 611 | |
| 612 | auto utility_fn_or_error = process->GetTarget().CreateUtilityFunction( |
| 613 | std::move(expr), dlopen_wrapper_name, eLanguageTypeC_plus_plus, exe_ctx); |
| 614 | if (!utility_fn_or_error) { |
| 615 | std::string error_str = llvm::toString(utility_fn_or_error.takeError()); |
| 616 | error.SetErrorStringWithFormat("dlopen error: could not create utility" |
| 617 | "function: %s", |
| 618 | error_str.c_str()); |
| 619 | return nullptr; |
| 620 | } |
| 621 | std::unique_ptr<UtilityFunction> dlopen_utility_func_up = |
| 622 | std::move(*utility_fn_or_error); |
| 623 | |
| 624 | Value value; |
| 625 | ValueList arguments; |
| 626 | FunctionCaller *do_dlopen_function = nullptr; |
| 627 | |
| 628 | // Fetch the clang types we will need: |
| 629 | TypeSystemClang *ast = |
| 630 | ScratchTypeSystemClang::GetForTarget(process->GetTarget()); |
| 631 | if (!ast) |
| 632 | return nullptr; |
| 633 | |
| 634 | CompilerType clang_void_pointer_type |
| 635 | = ast->GetBasicType(eBasicTypeVoid).GetPointerType(); |
| 636 | CompilerType clang_char_pointer_type |
| 637 | = ast->GetBasicType(eBasicTypeChar).GetPointerType(); |
| 638 | |
| 639 | // We are passing four arguments, the basename, the list of places to look, |
| 640 | // a buffer big enough for all the path + name combos, and |
| 641 | // a pointer to the storage we've made for the result: |
| 642 | value.SetValueType(Value::ValueType::Scalar); |
| 643 | value.SetCompilerType(clang_void_pointer_type); |
| 644 | arguments.PushValue(value); |
| 645 | value.SetCompilerType(clang_char_pointer_type); |
| 646 | arguments.PushValue(value); |
| 647 | arguments.PushValue(value); |
| 648 | arguments.PushValue(value); |
| 649 | |
| 650 | do_dlopen_function = dlopen_utility_func_up->MakeFunctionCaller( |
Value stored to 'do_dlopen_function' is never read | |
| 651 | clang_void_pointer_type, arguments, exe_ctx.GetThreadSP(), utility_error); |
| 652 | if (utility_error.Fail()) { |
| 653 | error.SetErrorStringWithFormat("dlopen error: could not make function" |
| 654 | "caller: %s", utility_error.AsCString()); |
| 655 | return nullptr; |
| 656 | } |
| 657 | |
| 658 | do_dlopen_function = dlopen_utility_func_up->GetFunctionCaller(); |
| 659 | if (!do_dlopen_function) { |
| 660 | error.SetErrorString("dlopen error: could not get function caller."); |
| 661 | return nullptr; |
| 662 | } |
| 663 | |
| 664 | // We made a good utility function, so cache it in the process: |
| 665 | return dlopen_utility_func_up; |
| 666 | } |
| 667 | |
| 668 | uint32_t PlatformPOSIX::DoLoadImage(lldb_private::Process *process, |
| 669 | const lldb_private::FileSpec &remote_file, |
| 670 | const std::vector<std::string> *paths, |
| 671 | lldb_private::Status &error, |
| 672 | lldb_private::FileSpec *loaded_image) { |
| 673 | if (loaded_image) |
| 674 | loaded_image->Clear(); |
| 675 | |
| 676 | std::string path; |
| 677 | path = remote_file.GetPath(); |
| 678 | |
| 679 | ThreadSP thread_sp = process->GetThreadList().GetExpressionExecutionThread(); |
| 680 | if (!thread_sp) { |
| 681 | error.SetErrorString("dlopen error: no thread available to call dlopen."); |
| 682 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 683 | } |
| 684 | |
| 685 | DiagnosticManager diagnostics; |
| 686 | |
| 687 | ExecutionContext exe_ctx; |
| 688 | thread_sp->CalculateExecutionContext(exe_ctx); |
| 689 | |
| 690 | Status utility_error; |
| 691 | UtilityFunction *dlopen_utility_func; |
| 692 | ValueList arguments; |
| 693 | FunctionCaller *do_dlopen_function = nullptr; |
| 694 | |
| 695 | // The UtilityFunction is held in the Process. Platforms don't track the |
| 696 | // lifespan of the Targets that use them, we can't put this in the Platform. |
| 697 | dlopen_utility_func = process->GetLoadImageUtilityFunction( |
| 698 | this, [&]() -> std::unique_ptr<UtilityFunction> { |
| 699 | return MakeLoadImageUtilityFunction(exe_ctx, error); |
| 700 | }); |
| 701 | // If we couldn't make it, the error will be in error, so we can exit here. |
| 702 | if (!dlopen_utility_func) |
| 703 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 704 | |
| 705 | do_dlopen_function = dlopen_utility_func->GetFunctionCaller(); |
| 706 | if (!do_dlopen_function) { |
| 707 | error.SetErrorString("dlopen error: could not get function caller."); |
| 708 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 709 | } |
| 710 | arguments = do_dlopen_function->GetArgumentValues(); |
| 711 | |
| 712 | // Now insert the path we are searching for and the result structure into the |
| 713 | // target. |
| 714 | uint32_t permissions = ePermissionsReadable|ePermissionsWritable; |
| 715 | size_t path_len = path.size() + 1; |
| 716 | lldb::addr_t path_addr = process->AllocateMemory(path_len, |
| 717 | permissions, |
| 718 | utility_error); |
| 719 | if (path_addr == LLDB_INVALID_ADDRESS(18446744073709551615UL)) { |
| 720 | error.SetErrorStringWithFormat("dlopen error: could not allocate memory" |
| 721 | "for path: %s", utility_error.AsCString()); |
| 722 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 723 | } |
| 724 | |
| 725 | // Make sure we deallocate the input string memory: |
| 726 | auto path_cleanup = llvm::make_scope_exit([process, path_addr] { |
| 727 | // Deallocate the buffer. |
| 728 | process->DeallocateMemory(path_addr); |
| 729 | }); |
| 730 | |
| 731 | process->WriteMemory(path_addr, path.c_str(), path_len, utility_error); |
| 732 | if (utility_error.Fail()) { |
| 733 | error.SetErrorStringWithFormat("dlopen error: could not write path string:" |
| 734 | " %s", utility_error.AsCString()); |
| 735 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 736 | } |
| 737 | |
| 738 | // Make space for our return structure. It is two pointers big: the token |
| 739 | // and the error string. |
| 740 | const uint32_t addr_size = process->GetAddressByteSize(); |
| 741 | lldb::addr_t return_addr = process->CallocateMemory(2*addr_size, |
| 742 | permissions, |
| 743 | utility_error); |
| 744 | if (utility_error.Fail()) { |
| 745 | error.SetErrorStringWithFormat("dlopen error: could not allocate memory" |
| 746 | "for path: %s", utility_error.AsCString()); |
| 747 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 748 | } |
| 749 | |
| 750 | // Make sure we deallocate the result structure memory |
| 751 | auto return_cleanup = llvm::make_scope_exit([process, return_addr] { |
| 752 | // Deallocate the buffer |
| 753 | process->DeallocateMemory(return_addr); |
| 754 | }); |
| 755 | |
| 756 | // This will be the address of the storage for paths, if we are using them, |
| 757 | // or nullptr to signal we aren't. |
| 758 | lldb::addr_t path_array_addr = 0x0; |
| 759 | llvm::Optional<llvm::detail::scope_exit<std::function<void()>>> |
| 760 | path_array_cleanup; |
| 761 | |
| 762 | // This is the address to a buffer large enough to hold the largest path |
| 763 | // conjoined with the library name we're passing in. This is a convenience |
| 764 | // to avoid having to call malloc in the dlopen function. |
| 765 | lldb::addr_t buffer_addr = 0x0; |
| 766 | llvm::Optional<llvm::detail::scope_exit<std::function<void()>>> |
| 767 | buffer_cleanup; |
| 768 | |
| 769 | // Set the values into our args and write them to the target: |
| 770 | if (paths != nullptr) { |
| 771 | // First insert the paths into the target. This is expected to be a |
| 772 | // continuous buffer with the strings laid out null terminated and |
| 773 | // end to end with an empty string terminating the buffer. |
| 774 | // We also compute the buffer's required size as we go. |
| 775 | size_t buffer_size = 0; |
| 776 | std::string path_array; |
| 777 | for (auto path : *paths) { |
| 778 | // Don't insert empty paths, they will make us abort the path |
| 779 | // search prematurely. |
| 780 | if (path.empty()) |
| 781 | continue; |
| 782 | size_t path_size = path.size(); |
| 783 | path_array.append(path); |
| 784 | path_array.push_back('\0'); |
| 785 | if (path_size > buffer_size) |
| 786 | buffer_size = path_size; |
| 787 | } |
| 788 | path_array.push_back('\0'); |
| 789 | |
| 790 | path_array_addr = process->AllocateMemory(path_array.size(), |
| 791 | permissions, |
| 792 | utility_error); |
| 793 | if (path_array_addr == LLDB_INVALID_ADDRESS(18446744073709551615UL)) { |
| 794 | error.SetErrorStringWithFormat("dlopen error: could not allocate memory" |
| 795 | "for path array: %s", |
| 796 | utility_error.AsCString()); |
| 797 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 798 | } |
| 799 | |
| 800 | // Make sure we deallocate the paths array. |
| 801 | path_array_cleanup.emplace([process, path_array_addr]() { |
| 802 | // Deallocate the path array. |
| 803 | process->DeallocateMemory(path_array_addr); |
| 804 | }); |
| 805 | |
| 806 | process->WriteMemory(path_array_addr, path_array.data(), |
| 807 | path_array.size(), utility_error); |
| 808 | |
| 809 | if (utility_error.Fail()) { |
| 810 | error.SetErrorStringWithFormat("dlopen error: could not write path array:" |
| 811 | " %s", utility_error.AsCString()); |
| 812 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 813 | } |
| 814 | // Now make spaces in the target for the buffer. We need to add one for |
| 815 | // the '/' that the utility function will insert and one for the '\0': |
| 816 | buffer_size += path.size() + 2; |
| 817 | |
| 818 | buffer_addr = process->AllocateMemory(buffer_size, |
| 819 | permissions, |
| 820 | utility_error); |
| 821 | if (buffer_addr == LLDB_INVALID_ADDRESS(18446744073709551615UL)) { |
| 822 | error.SetErrorStringWithFormat("dlopen error: could not allocate memory" |
| 823 | "for buffer: %s", |
| 824 | utility_error.AsCString()); |
| 825 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 826 | } |
| 827 | |
| 828 | // Make sure we deallocate the buffer memory: |
| 829 | buffer_cleanup.emplace([process, buffer_addr]() { |
| 830 | // Deallocate the buffer. |
| 831 | process->DeallocateMemory(buffer_addr); |
| 832 | }); |
| 833 | } |
| 834 | |
| 835 | arguments.GetValueAtIndex(0)->GetScalar() = path_addr; |
| 836 | arguments.GetValueAtIndex(1)->GetScalar() = path_array_addr; |
| 837 | arguments.GetValueAtIndex(2)->GetScalar() = buffer_addr; |
| 838 | arguments.GetValueAtIndex(3)->GetScalar() = return_addr; |
| 839 | |
| 840 | lldb::addr_t func_args_addr = LLDB_INVALID_ADDRESS(18446744073709551615UL); |
| 841 | |
| 842 | diagnostics.Clear(); |
| 843 | if (!do_dlopen_function->WriteFunctionArguments(exe_ctx, |
| 844 | func_args_addr, |
| 845 | arguments, |
| 846 | diagnostics)) { |
| 847 | error.SetErrorStringWithFormat("dlopen error: could not write function " |
| 848 | "arguments: %s", |
| 849 | diagnostics.GetString().c_str()); |
| 850 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 851 | } |
| 852 | |
| 853 | // Make sure we clean up the args structure. We can't reuse it because the |
| 854 | // Platform lives longer than the process and the Platforms don't get a |
| 855 | // signal to clean up cached data when a process goes away. |
| 856 | auto args_cleanup = |
| 857 | llvm::make_scope_exit([do_dlopen_function, &exe_ctx, func_args_addr] { |
| 858 | do_dlopen_function->DeallocateFunctionResults(exe_ctx, func_args_addr); |
| 859 | }); |
| 860 | |
| 861 | // Now run the caller: |
| 862 | EvaluateExpressionOptions options; |
| 863 | options.SetExecutionPolicy(eExecutionPolicyAlways); |
| 864 | options.SetLanguage(eLanguageTypeC_plus_plus); |
| 865 | options.SetIgnoreBreakpoints(true); |
| 866 | options.SetUnwindOnError(true); |
| 867 | options.SetTrapExceptions(false); // dlopen can't throw exceptions, so |
| 868 | // don't do the work to trap them. |
| 869 | options.SetTimeout(process->GetUtilityExpressionTimeout()); |
| 870 | options.SetIsForUtilityExpr(true); |
| 871 | |
| 872 | Value return_value; |
| 873 | // Fetch the clang types we will need: |
| 874 | TypeSystemClang *ast = |
| 875 | ScratchTypeSystemClang::GetForTarget(process->GetTarget()); |
| 876 | if (!ast) { |
| 877 | error.SetErrorString("dlopen error: Unable to get TypeSystemClang"); |
| 878 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 879 | } |
| 880 | |
| 881 | CompilerType clang_void_pointer_type |
| 882 | = ast->GetBasicType(eBasicTypeVoid).GetPointerType(); |
| 883 | |
| 884 | return_value.SetCompilerType(clang_void_pointer_type); |
| 885 | |
| 886 | ExpressionResults results = do_dlopen_function->ExecuteFunction( |
| 887 | exe_ctx, &func_args_addr, options, diagnostics, return_value); |
| 888 | if (results != eExpressionCompleted) { |
| 889 | error.SetErrorStringWithFormat("dlopen error: failed executing " |
| 890 | "dlopen wrapper function: %s", |
| 891 | diagnostics.GetString().c_str()); |
| 892 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 893 | } |
| 894 | |
| 895 | // Read the dlopen token from the return area: |
| 896 | lldb::addr_t token = process->ReadPointerFromMemory(return_addr, |
| 897 | utility_error); |
| 898 | if (utility_error.Fail()) { |
| 899 | error.SetErrorStringWithFormat("dlopen error: could not read the return " |
| 900 | "struct: %s", utility_error.AsCString()); |
| 901 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 902 | } |
| 903 | |
| 904 | // The dlopen succeeded! |
| 905 | if (token != 0x0) { |
| 906 | if (loaded_image && buffer_addr != 0x0) |
| 907 | { |
| 908 | // Capture the image which was loaded. We leave it in the buffer on |
| 909 | // exit from the dlopen function, so we can just read it from there: |
| 910 | std::string name_string; |
| 911 | process->ReadCStringFromMemory(buffer_addr, name_string, utility_error); |
| 912 | if (utility_error.Success()) |
| 913 | loaded_image->SetFile(name_string, llvm::sys::path::Style::posix); |
| 914 | } |
| 915 | return process->AddImageToken(token); |
| 916 | } |
| 917 | |
| 918 | // We got an error, lets read in the error string: |
| 919 | std::string dlopen_error_str; |
| 920 | lldb::addr_t error_addr |
| 921 | = process->ReadPointerFromMemory(return_addr + addr_size, utility_error); |
| 922 | if (utility_error.Fail()) { |
| 923 | error.SetErrorStringWithFormat("dlopen error: could not read error string: " |
| 924 | "%s", utility_error.AsCString()); |
| 925 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 926 | } |
| 927 | |
| 928 | size_t num_chars = process->ReadCStringFromMemory(error_addr + addr_size, |
| 929 | dlopen_error_str, |
| 930 | utility_error); |
| 931 | if (utility_error.Success() && num_chars > 0) |
| 932 | error.SetErrorStringWithFormat("dlopen error: %s", |
| 933 | dlopen_error_str.c_str()); |
| 934 | else |
| 935 | error.SetErrorStringWithFormat("dlopen failed for unknown reasons."); |
| 936 | |
| 937 | return LLDB_INVALID_IMAGE_TOKEN(4294967295U); |
| 938 | } |
| 939 | |
| 940 | Status PlatformPOSIX::UnloadImage(lldb_private::Process *process, |
| 941 | uint32_t image_token) { |
| 942 | const addr_t image_addr = process->GetImagePtrFromToken(image_token); |
| 943 | if (image_addr == LLDB_INVALID_ADDRESS(18446744073709551615UL)) |
| 944 | return Status("Invalid image token"); |
| 945 | |
| 946 | StreamString expr; |
| 947 | expr.Printf("dlclose((void *)0x%" PRIx64"l" "x" ")", image_addr); |
| 948 | llvm::StringRef prefix = GetLibdlFunctionDeclarations(process); |
| 949 | lldb::ValueObjectSP result_valobj_sp; |
| 950 | Status error = EvaluateLibdlExpression(process, expr.GetData(), prefix, |
| 951 | result_valobj_sp); |
| 952 | if (error.Fail()) |
| 953 | return error; |
| 954 | |
| 955 | if (result_valobj_sp->GetError().Fail()) |
| 956 | return result_valobj_sp->GetError(); |
| 957 | |
| 958 | Scalar scalar; |
| 959 | if (result_valobj_sp->ResolveValue(scalar)) { |
| 960 | if (scalar.UInt(1)) |
| 961 | return Status("expression failed: \"%s\"", expr.GetData()); |
| 962 | process->ResetImageToken(image_token); |
| 963 | } |
| 964 | return Status(); |
| 965 | } |
| 966 | |
| 967 | llvm::StringRef |
| 968 | PlatformPOSIX::GetLibdlFunctionDeclarations(lldb_private::Process *process) { |
| 969 | return R"( |
| 970 | extern "C" void* dlopen(const char*, int); |
| 971 | extern "C" void* dlsym(void*, const char*); |
| 972 | extern "C" int dlclose(void*); |
| 973 | extern "C" char* dlerror(void); |
| 974 | )"; |
| 975 | } |
| 976 | |
| 977 | ConstString PlatformPOSIX::GetFullNameForDylib(ConstString basename) { |
| 978 | if (basename.IsEmpty()) |
| 979 | return basename; |
| 980 | |
| 981 | StreamString stream; |
| 982 | stream.Printf("lib%s.so", basename.GetCString()); |
| 983 | return ConstString(stream.GetString()); |
| 984 | } |