Function threads_for_process

src/traffic_crashlog/backtrace.cc:59–97

DbgCtl dbg_ctl_backtrace{"backtrace"};

static threadlist
threads_for_process(pid_t proc)
{
  DIR           *dir   = nullptr;
  struct dirent *entry = nullptr;

  char       path[64];
  threadlist threads;

  if (snprintf(path, sizeof(path), "/proc/%ld/task", static_cast<long>(proc)) >= static_cast<int>(sizeof(path))) {
    goto done;
  }

  dir = opendir(path);
  if (dir == nullptr) {
    goto done;
  }

  while ((entry = readdir(dir))) {
    pid_t threadid;

    if (isdot(entry->d_name) || isdotdot(entry->d_name)) {
      continue;
    }

    threadid = strtol(entry->d_name, nullptr, 10);
    if (threadid > 0) {
      threads.push_back(threadid);
      Dbg(dbg_ctl_backtrace, "found thread %ld\n", (long)threadid);
    }
  }

done:
  if (dir) {
    closedir(dir);
  }

  return threads;
}

static void
backtrace_for_thread(pid_t threadid, TextBuffer &text)