diff options
Diffstat (limited to 'source/Host/linux/Host.cpp')
| -rw-r--r-- | source/Host/linux/Host.cpp | 612 |
1 files changed, 292 insertions, 320 deletions
diff --git a/source/Host/linux/Host.cpp b/source/Host/linux/Host.cpp index 62bf5362de01..8acf4a94e5bf 100644 --- a/source/Host/linux/Host.cpp +++ b/source/Host/linux/Host.cpp @@ -19,387 +19,359 @@ // C++ Includes // Other libraries and framework includes +#include "llvm/Support/ScopedPrinter.h" // Project includes #include "lldb/Core/Error.h" #include "lldb/Core/Log.h" #include "lldb/Target/Process.h" -#include "lldb/Host/Host.h" -#include "lldb/Host/HostInfo.h" -#ifdef __ANDROID_NDK__ -#include "lldb/Host/android/Android.h" -#endif #include "lldb/Core/DataBufferHeap.h" #include "lldb/Core/DataExtractor.h" +#include "lldb/Host/Host.h" +#include "lldb/Host/HostInfo.h" +#include "Plugins/Process/Linux/ProcFileReader.h" #include "lldb/Core/ModuleSpec.h" #include "lldb/Symbol/ObjectFile.h" -#include "Plugins/Process/Linux/ProcFileReader.h" using namespace lldb; using namespace lldb_private; -typedef enum ProcessStateFlags -{ - eProcessStateRunning = (1u << 0), // Running - eProcessStateSleeping = (1u << 1), // Sleeping in an interruptible wait - eProcessStateWaiting = (1u << 2), // Waiting in an uninterruptible disk sleep - eProcessStateZombie = (1u << 3), // Zombie - eProcessStateTracedOrStopped = (1u << 4), // Traced or stopped (on a signal) - eProcessStatePaging = (1u << 5) // Paging +typedef enum ProcessStateFlags { + eProcessStateRunning = (1u << 0), // Running + eProcessStateSleeping = (1u << 1), // Sleeping in an interruptible wait + eProcessStateWaiting = (1u << 2), // Waiting in an uninterruptible disk sleep + eProcessStateZombie = (1u << 3), // Zombie + eProcessStateTracedOrStopped = (1u << 4), // Traced or stopped (on a signal) + eProcessStatePaging = (1u << 5) // Paging } ProcessStateFlags; -typedef struct ProcessStatInfo -{ - lldb::pid_t ppid; // Parent Process ID - uint32_t fProcessState; // ProcessStateFlags +typedef struct ProcessStatInfo { + lldb::pid_t ppid; // Parent Process ID + uint32_t fProcessState; // ProcessStateFlags } ProcessStatInfo; -// Get the process info with additional information from /proc/$PID/stat (like process state, and tracer pid). -static bool GetProcessAndStatInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info, ProcessStatInfo &stat_info, lldb::pid_t &tracerpid); - -static bool -ReadProcPseudoFileStat (lldb::pid_t pid, ProcessStatInfo& stat_info) -{ - // Read the /proc/$PID/stat file. - lldb::DataBufferSP buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer (pid, "stat"); - - // The filename of the executable is stored in parenthesis right after the pid. We look for the closing - // parenthesis for the filename and work from there in case the name has something funky like ')' in it. - const char *filename_end = strrchr ((const char *)buf_sp->GetBytes(), ')'); - if (filename_end) - { - char state = '\0'; - int ppid = LLDB_INVALID_PROCESS_ID; - - // Read state and ppid. - sscanf (filename_end + 1, " %c %d", &state, &ppid); - - stat_info.ppid = ppid; - - switch (state) - { - case 'R': - stat_info.fProcessState |= eProcessStateRunning; - break; - case 'S': - stat_info.fProcessState |= eProcessStateSleeping; - break; - case 'D': - stat_info.fProcessState |= eProcessStateWaiting; - break; - case 'Z': - stat_info.fProcessState |= eProcessStateZombie; - break; - case 'T': - stat_info.fProcessState |= eProcessStateTracedOrStopped; - break; - case 'W': - stat_info.fProcessState |= eProcessStatePaging; - break; - } - - return true; +// Get the process info with additional information from /proc/$PID/stat (like +// process state, and tracer pid). +static bool GetProcessAndStatInfo(lldb::pid_t pid, + ProcessInstanceInfo &process_info, + ProcessStatInfo &stat_info, + lldb::pid_t &tracerpid); + +static bool ReadProcPseudoFileStat(lldb::pid_t pid, + ProcessStatInfo &stat_info) { + // Read the /proc/$PID/stat file. + lldb::DataBufferSP buf_sp = + process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "stat"); + + // The filename of the executable is stored in parenthesis right after the + // pid. We look for the closing + // parenthesis for the filename and work from there in case the name has + // something funky like ')' in it. + const char *filename_end = strrchr((const char *)buf_sp->GetBytes(), ')'); + if (filename_end) { + char state = '\0'; + int ppid = LLDB_INVALID_PROCESS_ID; + + // Read state and ppid. + sscanf(filename_end + 1, " %c %d", &state, &ppid); + + stat_info.ppid = ppid; + + switch (state) { + case 'R': + stat_info.fProcessState |= eProcessStateRunning; + break; + case 'S': + stat_info.fProcessState |= eProcessStateSleeping; + break; + case 'D': + stat_info.fProcessState |= eProcessStateWaiting; + break; + case 'Z': + stat_info.fProcessState |= eProcessStateZombie; + break; + case 'T': + stat_info.fProcessState |= eProcessStateTracedOrStopped; + break; + case 'W': + stat_info.fProcessState |= eProcessStatePaging; + break; } - return false; -} - -static void -GetLinuxProcessUserAndGroup (lldb::pid_t pid, ProcessInstanceInfo &process_info, lldb::pid_t &tracerpid) -{ - tracerpid = 0; - uint32_t rUid = UINT32_MAX; // Real User ID - uint32_t eUid = UINT32_MAX; // Effective User ID - uint32_t rGid = UINT32_MAX; // Real Group ID - uint32_t eGid = UINT32_MAX; // Effective Group ID - - // Read the /proc/$PID/status file and parse the Uid:, Gid:, and TracerPid: fields. - lldb::DataBufferSP buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer (pid, "status"); - - static const char uid_token[] = "Uid:"; - char *buf_uid = strstr ((char *)buf_sp->GetBytes(), uid_token); - if (buf_uid) - { - // Real, effective, saved set, and file system UIDs. Read the first two. - buf_uid += sizeof(uid_token); - rUid = strtol (buf_uid, &buf_uid, 10); - eUid = strtol (buf_uid, &buf_uid, 10); - } - - static const char gid_token[] = "Gid:"; - char *buf_gid = strstr ((char *)buf_sp->GetBytes(), gid_token); - if (buf_gid) - { - // Real, effective, saved set, and file system GIDs. Read the first two. - buf_gid += sizeof(gid_token); - rGid = strtol (buf_gid, &buf_gid, 10); - eGid = strtol (buf_gid, &buf_gid, 10); - } - - static const char tracerpid_token[] = "TracerPid:"; - char *buf_tracerpid = strstr((char *)buf_sp->GetBytes(), tracerpid_token); - if (buf_tracerpid) - { - // Tracer PID. 0 if we're not being debugged. - buf_tracerpid += sizeof(tracerpid_token); - tracerpid = strtol (buf_tracerpid, &buf_tracerpid, 10); - } + return true; + } - process_info.SetUserID (rUid); - process_info.SetEffectiveUserID (eUid); - process_info.SetGroupID (rGid); - process_info.SetEffectiveGroupID (eGid); + return false; } -lldb::DataBufferSP -Host::GetAuxvData(lldb_private::Process *process) -{ - return process_linux::ProcFileReader::ReadIntoDataBuffer (process->GetID(), "auxv"); +static void GetLinuxProcessUserAndGroup(lldb::pid_t pid, + ProcessInstanceInfo &process_info, + lldb::pid_t &tracerpid) { + tracerpid = 0; + uint32_t rUid = UINT32_MAX; // Real User ID + uint32_t eUid = UINT32_MAX; // Effective User ID + uint32_t rGid = UINT32_MAX; // Real Group ID + uint32_t eGid = UINT32_MAX; // Effective Group ID + + // Read the /proc/$PID/status file and parse the Uid:, Gid:, and TracerPid: + // fields. + lldb::DataBufferSP buf_sp = + process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "status"); + + static const char uid_token[] = "Uid:"; + char *buf_uid = strstr((char *)buf_sp->GetBytes(), uid_token); + if (buf_uid) { + // Real, effective, saved set, and file system UIDs. Read the first two. + buf_uid += sizeof(uid_token); + rUid = strtol(buf_uid, &buf_uid, 10); + eUid = strtol(buf_uid, &buf_uid, 10); + } + + static const char gid_token[] = "Gid:"; + char *buf_gid = strstr((char *)buf_sp->GetBytes(), gid_token); + if (buf_gid) { + // Real, effective, saved set, and file system GIDs. Read the first two. + buf_gid += sizeof(gid_token); + rGid = strtol(buf_gid, &buf_gid, 10); + eGid = strtol(buf_gid, &buf_gid, 10); + } + + static const char tracerpid_token[] = "TracerPid:"; + char *buf_tracerpid = strstr((char *)buf_sp->GetBytes(), tracerpid_token); + if (buf_tracerpid) { + // Tracer PID. 0 if we're not being debugged. + buf_tracerpid += sizeof(tracerpid_token); + tracerpid = strtol(buf_tracerpid, &buf_tracerpid, 10); + } + + process_info.SetUserID(rUid); + process_info.SetEffectiveUserID(eUid); + process_info.SetGroupID(rGid); + process_info.SetEffectiveGroupID(eGid); } -lldb::DataBufferSP -Host::GetAuxvData (lldb::pid_t pid) -{ - return process_linux::ProcFileReader::ReadIntoDataBuffer (pid, "auxv"); +lldb::DataBufferSP Host::GetAuxvData(lldb_private::Process *process) { + return process_linux::ProcFileReader::ReadIntoDataBuffer(process->GetID(), + "auxv"); } -static bool -IsDirNumeric(const char *dname) -{ - for (; *dname; dname++) - { - if (!isdigit (*dname)) - return false; - } - return true; +lldb::DataBufferSP Host::GetAuxvData(lldb::pid_t pid) { + return process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "auxv"); } -uint32_t -Host::FindProcesses (const ProcessInstanceInfoMatch &match_info, ProcessInstanceInfoList &process_infos) -{ - static const char procdir[] = "/proc/"; +static bool IsDirNumeric(const char *dname) { + for (; *dname; dname++) { + if (!isdigit(*dname)) + return false; + } + return true; +} - DIR *dirproc = opendir (procdir); - if (dirproc) - { - struct dirent *direntry = NULL; - const uid_t our_uid = getuid(); - const lldb::pid_t our_pid = getpid(); - bool all_users = match_info.GetMatchAllUsers(); +uint32_t Host::FindProcesses(const ProcessInstanceInfoMatch &match_info, + ProcessInstanceInfoList &process_infos) { + static const char procdir[] = "/proc/"; - while ((direntry = readdir (dirproc)) != NULL) - { - if (direntry->d_type != DT_DIR || !IsDirNumeric (direntry->d_name)) - continue; + DIR *dirproc = opendir(procdir); + if (dirproc) { + struct dirent *direntry = NULL; + const uid_t our_uid = getuid(); + const lldb::pid_t our_pid = getpid(); + bool all_users = match_info.GetMatchAllUsers(); - lldb::pid_t pid = atoi (direntry->d_name); + while ((direntry = readdir(dirproc)) != NULL) { + if (direntry->d_type != DT_DIR || !IsDirNumeric(direntry->d_name)) + continue; - // Skip this process. - if (pid == our_pid) - continue; + lldb::pid_t pid = atoi(direntry->d_name); - lldb::pid_t tracerpid; - ProcessStatInfo stat_info; - ProcessInstanceInfo process_info; + // Skip this process. + if (pid == our_pid) + continue; - if (!GetProcessAndStatInfo (pid, process_info, stat_info, tracerpid)) - continue; + lldb::pid_t tracerpid; + ProcessStatInfo stat_info; + ProcessInstanceInfo process_info; - // Skip if process is being debugged. - if (tracerpid != 0) - continue; + if (!GetProcessAndStatInfo(pid, process_info, stat_info, tracerpid)) + continue; - // Skip zombies. - if (stat_info.fProcessState & eProcessStateZombie) - continue; + // Skip if process is being debugged. + if (tracerpid != 0) + continue; - // Check for user match if we're not matching all users and not running as root. - if (!all_users && (our_uid != 0) && (process_info.GetUserID() != our_uid)) - continue; + // Skip zombies. + if (stat_info.fProcessState & eProcessStateZombie) + continue; - if (match_info.Matches (process_info)) - { - process_infos.Append (process_info); - } - } + // Check for user match if we're not matching all users and not running as + // root. + if (!all_users && (our_uid != 0) && (process_info.GetUserID() != our_uid)) + continue; - closedir (dirproc); + if (match_info.Matches(process_info)) { + process_infos.Append(process_info); + } } - return process_infos.GetSize(); + closedir(dirproc); + } + + return process_infos.GetSize(); } -bool -Host::FindProcessThreads (const lldb::pid_t pid, TidMap &tids_to_attach) -{ - bool tids_changed = false; - static const char procdir[] = "/proc/"; - static const char taskdir[] = "/task/"; - std::string process_task_dir = procdir + std::to_string(pid) + taskdir; - DIR *dirproc = opendir (process_task_dir.c_str()); - - if (dirproc) - { - struct dirent *direntry = NULL; - while ((direntry = readdir (dirproc)) != NULL) - { - if (direntry->d_type != DT_DIR || !IsDirNumeric (direntry->d_name)) - continue; - - lldb::tid_t tid = atoi(direntry->d_name); - TidMap::iterator it = tids_to_attach.find(tid); - if (it == tids_to_attach.end()) - { - tids_to_attach.insert(TidPair(tid, false)); - tids_changed = true; - } - } - closedir (dirproc); +bool Host::FindProcessThreads(const lldb::pid_t pid, TidMap &tids_to_attach) { + bool tids_changed = false; + static const char procdir[] = "/proc/"; + static const char taskdir[] = "/task/"; + std::string process_task_dir = procdir + llvm::to_string(pid) + taskdir; + DIR *dirproc = opendir(process_task_dir.c_str()); + + if (dirproc) { + struct dirent *direntry = NULL; + while ((direntry = readdir(dirproc)) != NULL) { + if (direntry->d_type != DT_DIR || !IsDirNumeric(direntry->d_name)) + continue; + + lldb::tid_t tid = atoi(direntry->d_name); + TidMap::iterator it = tids_to_attach.find(tid); + if (it == tids_to_attach.end()) { + tids_to_attach.insert(TidPair(tid, false)); + tids_changed = true; + } } + closedir(dirproc); + } - return tids_changed; + return tids_changed; } -static bool -GetELFProcessCPUType (const char *exe_path, ProcessInstanceInfo &process_info) -{ - // Clear the architecture. - process_info.GetArchitecture().Clear(); - - ModuleSpecList specs; - FileSpec filespec (exe_path, false); - const size_t num_specs = ObjectFile::GetModuleSpecifications (filespec, 0, 0, specs); - // GetModuleSpecifications() could fail if the executable has been deleted or is locked. - // But it shouldn't return more than 1 architecture. - assert(num_specs <= 1 && "Linux plugin supports only a single architecture"); - if (num_specs == 1) - { - ModuleSpec module_spec; - if (specs.GetModuleSpecAtIndex (0, module_spec) && module_spec.GetArchitecture().IsValid()) - { - process_info.GetArchitecture () = module_spec.GetArchitecture(); - return true; - } +static bool GetELFProcessCPUType(const char *exe_path, + ProcessInstanceInfo &process_info) { + // Clear the architecture. + process_info.GetArchitecture().Clear(); + + ModuleSpecList specs; + FileSpec filespec(exe_path, false); + const size_t num_specs = + ObjectFile::GetModuleSpecifications(filespec, 0, 0, specs); + // GetModuleSpecifications() could fail if the executable has been deleted or + // is locked. + // But it shouldn't return more than 1 architecture. + assert(num_specs <= 1 && "Linux plugin supports only a single architecture"); + if (num_specs == 1) { + ModuleSpec module_spec; + if (specs.GetModuleSpecAtIndex(0, module_spec) && + module_spec.GetArchitecture().IsValid()) { + process_info.GetArchitecture() = module_spec.GetArchitecture(); + return true; } - return false; + } + return false; } -static bool -GetProcessAndStatInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info, ProcessStatInfo &stat_info, lldb::pid_t &tracerpid) -{ - tracerpid = 0; - process_info.Clear(); - ::memset (&stat_info, 0, sizeof(stat_info)); - stat_info.ppid = LLDB_INVALID_PROCESS_ID; - - Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); - - // Use special code here because proc/[pid]/exe is a symbolic link. - char link_path[PATH_MAX]; - char exe_path[PATH_MAX] = ""; - if (snprintf (link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", pid) <= 0) - { - if (log) - log->Printf("%s: failed to sprintf pid %" PRIu64, __FUNCTION__, pid); - return false; - } - - ssize_t len = readlink (link_path, exe_path, sizeof(exe_path) - 1); - if (len <= 0) - { - if (log) - log->Printf("%s: failed to read link %s: %s", __FUNCTION__, link_path, strerror(errno)); - return false; - } - - // readlink does not append a null byte. - exe_path[len] = 0; - - // If the binary has been deleted, the link name has " (deleted)" appended. - // Remove if there. - static const ssize_t deleted_len = strlen(" (deleted)"); - if (len > deleted_len && - !strcmp(exe_path + len - deleted_len, " (deleted)")) - { - exe_path[len - deleted_len] = 0; - } - else - { - GetELFProcessCPUType (exe_path, process_info); - } - - process_info.SetProcessID(pid); - process_info.GetExecutableFile().SetFile(exe_path, false); - process_info.GetArchitecture().MergeFrom(HostInfo::GetArchitecture()); - - lldb::DataBufferSP buf_sp; - - // Get the process environment. - buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "environ"); - Args &info_env = process_info.GetEnvironmentEntries(); - char *next_var = (char *)buf_sp->GetBytes(); - char *end_buf = next_var + buf_sp->GetByteSize(); - while (next_var < end_buf && 0 != *next_var) - { - info_env.AppendArgument(next_var); - next_var += strlen(next_var) + 1; - } +static bool GetProcessAndStatInfo(lldb::pid_t pid, + ProcessInstanceInfo &process_info, + ProcessStatInfo &stat_info, + lldb::pid_t &tracerpid) { + tracerpid = 0; + process_info.Clear(); + ::memset(&stat_info, 0, sizeof(stat_info)); + stat_info.ppid = LLDB_INVALID_PROCESS_ID; + + Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS)); + + // Use special code here because proc/[pid]/exe is a symbolic link. + char link_path[PATH_MAX]; + char exe_path[PATH_MAX] = ""; + if (snprintf(link_path, PATH_MAX, "/proc/%" PRIu64 "/exe", pid) <= 0) { + if (log) + log->Printf("%s: failed to sprintf pid %" PRIu64, __FUNCTION__, pid); + return false; + } - // Get the command line used to start the process. - buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "cmdline"); - - // Grab Arg0 first, if there is one. - char *cmd = (char *)buf_sp->GetBytes(); - if (cmd) - { - process_info.SetArg0(cmd); - - // Now process any remaining arguments. - Args &info_args = process_info.GetArguments(); - char *next_arg = cmd + strlen(cmd) + 1; - end_buf = cmd + buf_sp->GetByteSize(); - while (next_arg < end_buf && 0 != *next_arg) - { - info_args.AppendArgument(next_arg); - next_arg += strlen(next_arg) + 1; - } + ssize_t len = readlink(link_path, exe_path, sizeof(exe_path) - 1); + if (len <= 0) { + if (log) + log->Printf("%s: failed to read link %s: %s", __FUNCTION__, link_path, + strerror(errno)); + return false; + } + + // readlink does not append a null byte. + exe_path[len] = 0; + + // If the binary has been deleted, the link name has " (deleted)" appended. + // Remove if there. + static const ssize_t deleted_len = strlen(" (deleted)"); + if (len > deleted_len && + !strcmp(exe_path + len - deleted_len, " (deleted)")) { + exe_path[len - deleted_len] = 0; + } else { + GetELFProcessCPUType(exe_path, process_info); + } + + process_info.SetProcessID(pid); + process_info.GetExecutableFile().SetFile(exe_path, false); + process_info.GetArchitecture().MergeFrom(HostInfo::GetArchitecture()); + + lldb::DataBufferSP buf_sp; + + // Get the process environment. + buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "environ"); + Args &info_env = process_info.GetEnvironmentEntries(); + char *next_var = (char *)buf_sp->GetBytes(); + char *end_buf = next_var + buf_sp->GetByteSize(); + while (next_var < end_buf && 0 != *next_var) { + info_env.AppendArgument(llvm::StringRef(next_var)); + next_var += strlen(next_var) + 1; + } + + // Get the command line used to start the process. + buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer(pid, "cmdline"); + + // Grab Arg0 first, if there is one. + char *cmd = (char *)buf_sp->GetBytes(); + if (cmd) { + process_info.SetArg0(cmd); + + // Now process any remaining arguments. + Args &info_args = process_info.GetArguments(); + char *next_arg = cmd + strlen(cmd) + 1; + end_buf = cmd + buf_sp->GetByteSize(); + while (next_arg < end_buf && 0 != *next_arg) { + info_args.AppendArgument(llvm::StringRef(next_arg)); + next_arg += strlen(next_arg) + 1; } + } - // Read /proc/$PID/stat to get our parent pid. - if (ReadProcPseudoFileStat (pid, stat_info)) - { - process_info.SetParentProcessID (stat_info.ppid); - } + // Read /proc/$PID/stat to get our parent pid. + if (ReadProcPseudoFileStat(pid, stat_info)) { + process_info.SetParentProcessID(stat_info.ppid); + } - // Get User and Group IDs and get tracer pid. - GetLinuxProcessUserAndGroup (pid, process_info, tracerpid); + // Get User and Group IDs and get tracer pid. + GetLinuxProcessUserAndGroup(pid, process_info, tracerpid); - return true; + return true; } -bool -Host::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info) -{ - lldb::pid_t tracerpid; - ProcessStatInfo stat_info; +bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) { + lldb::pid_t tracerpid; + ProcessStatInfo stat_info; - return GetProcessAndStatInfo (pid, process_info, stat_info, tracerpid); + return GetProcessAndStatInfo(pid, process_info, stat_info, tracerpid); } -size_t -Host::GetEnvironment (StringList &env) -{ - char **host_env = environ; - char *env_entry; - size_t i; - for (i=0; (env_entry = host_env[i]) != NULL; ++i) - env.AppendString(env_entry); - return i; +size_t Host::GetEnvironment(StringList &env) { + char **host_env = environ; + char *env_entry; + size_t i; + for (i = 0; (env_entry = host_env[i]) != NULL; ++i) + env.AppendString(env_entry); + return i; } -Error -Host::ShellExpandArguments (ProcessLaunchInfo &launch_info) -{ - return Error("unimplemented"); +Error Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) { + return Error("unimplemented"); } |