syscall_stats
typedef map<string, syscall_stats> StatsMap;
syscall_stats& stats = sSyscallStats[syscall.Name()];
const std::pair<const std::string*, const syscall_stats*>& a,
const std::pair<const std::string*, const syscall_stats*>& b)
typedef std::vector<std::pair<const std::string*, const syscall_stats*> >
const syscall_stats& stats = *callIterator->second;