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;
// 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)
return false;
ssize_t len = readlink (link_path, exe_path, sizeof(exe_path) - 1);
if (len <= 0)
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);
lldb::DataBufferSP buf_sp;
// Get the process environment.
buf_sp = ReadProcPseudoFile(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;
}
// Get the commond line used to start the process.
buf_sp = ReadProcPseudoFile(pid, "cmdline");
// Grab Arg0 first.
char *cmd = (char *)buf_sp->GetBytes();
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;
}
// 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);
return true;
}
static bool GetProcessAndStatInfo(::pid_t pid,
ProcessInstanceInfo &process_info,
ProcessState &State, ::pid_t &tracerpid) {
tracerpid = 0;
process_info.Clear();
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));
// We can't use getProcFile here because proc/[pid]/exe is a symbolic link.
llvm::SmallString<64> ProcExe;
(llvm::Twine("/proc/") + llvm::Twine(pid) + "/exe").toVector(ProcExe);
std::string ExePath(PATH_MAX, '\0');
ssize_t len = readlink(ProcExe.c_str(), &ExePath[0], PATH_MAX);
if (len <= 0) {
LLDB_LOG(log, "failed to read link exe link for {0}: {1}", pid,
Status(errno, eErrorTypePOSIX));
return false;
}
ExePath.resize(len);
// If the binary has been deleted, the link name has " (deleted)" appended.
// Remove if there.
llvm::StringRef PathRef = ExePath;
PathRef.consume_back(" (deleted)");
GetELFProcessCPUType(PathRef, process_info);
// Get the process environment.
auto BufferOrError = getProcFile(pid, "environ");
if (!BufferOrError)
return false;
std::unique_ptr<llvm::MemoryBuffer> Environ = std::move(*BufferOrError);
// Get the command line used to start the process.
BufferOrError = getProcFile(pid, "cmdline");
if (!BufferOrError)
return false;
std::unique_ptr<llvm::MemoryBuffer> Cmdline = std::move(*BufferOrError);
// Get User and Group IDs and get tracer pid.
if (!GetStatusInfo(pid, process_info, State, tracerpid))
return false;
process_info.SetProcessID(pid);
process_info.GetExecutableFile().SetFile(PathRef, false);
process_info.GetArchitecture().MergeFrom(HostInfo::GetArchitecture());
llvm::StringRef Rest = Environ->getBuffer();
while (!Rest.empty()) {
llvm::StringRef Var;
std::tie(Var, Rest) = Rest.split('\0');
process_info.GetEnvironmentEntries().AppendArgument(Var);
}
llvm::StringRef Arg0;
std::tie(Arg0, Rest) = Cmdline->getBuffer().split('\0');
process_info.SetArg0(Arg0);
while (!Rest.empty()) {
llvm::StringRef Arg;
std::tie(Arg, Rest) = Rest.split('\0');
process_info.GetArguments().AppendArgument(Arg);
}
return true;
}