/**
 * @author Christian Burger (christian@krikkel.de)
 * @todo Switch over to <seccomp.h>? For resolving system call numbers?
 *       Maybe keep the current solution as a fallback?
 * @todo catch `out of range` exception from stoi()
 *
 * Contains mapping of system calls numbers to names from original dev system:
 *      "Linux 5.13.0-28-generic #31~20.04.1-Ubuntu SMP \
 *       Wed Jan 19 14:08:10 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux"
 * See comment at the end for the actual command to gather mapping information.
 */

#ifndef NDEBUG

#include "Debug.hpp"

#include <algorithm>
#include <cstring>
#include <filesystem>
#include <cstdio>
#include <syscall.h>
#include <sys/ptrace.h>
#include <sys/stat.h>
#include <fcntl.h>

#define BUFFER_SIZE 128

namespace krikkel
{
    using std::string;
    using std::fstream;
    using std::filesystem::is_directory;
    using std::endl;
    using std::time;
    using std::localtime;
    using std::strftime;
    using std::min;

    Debug::Debug()
    {
        string directory = ".";
        if(is_directory("sandbox"))
            directory = "./sandbox";
        logFile = fstream(directory + "/debug.log", fstream::out | fstream::app);//| fstream::trunc);
        logFile << endl << endl << endl << endl << "New instance of class Debug." << endl;
        logFile << getUname();
        logFile.flush();
    }

    string Debug::getUname()
    {
        string result = "";
        char buffer[BUFFER_SIZE];
        FILE *unameProcess = popen("uname -srvmpio", "r");

        if(unameProcess && fgets(buffer, BUFFER_SIZE, unameProcess))
            result = buffer;
        pclose(unameProcess);

        return result;
    }

    string Debug::getTimestamp()
    {
        time_t now = time(NULL);
        tm *localNow = localtime(&now);
        static char formattedLocalNow[32];
        strftime(formattedLocalNow, 32, "%c", localNow);

        return formattedLocalNow;
    }

    void Debug::log(string message, string fileName, int lineNo, string functionName)
    {
        string output = "";
        size_t position = message.find("sysCall(");

        if(position != string::npos)
        {
            size_t end = message.find_first_not_of("0123456789", position + 8);
            unsigned long long systemCallNumber = std::stoi(message.substr(position + 8, end - position - 8));
            string systemCallName = strlen(syscalls[systemCallNumber]) != 0 ? syscalls[systemCallNumber]
                                                                     : "unknown_system_call";
            if(systemCallNumber < MAX_NUMBER_OF_SYSCALLS)
                output = message.replace(position, end - position + 1, systemCallName + "(");
        }
        if(output == "")
            output = message;

        logFile << getTimestamp() << ": " << output << " (in "
                << fileName.substr(fileName.rfind('/') + 1) << ":"
                << lineNo << " in " << functionName << "())" << endl;
        logFile.flush();
    }

    std::string Debug::peekData(pid_t shellPid, void *data, size_t length)
    {
        std::string result;

        for(size_t index = 0; index < length / sizeof(long); ++index)
        {
            long datum = ptrace(PTRACE_PEEKDATA, shellPid, ((char *) data) + index * sizeof(long));
            if(length == (size_t) -1)
            {
                size_t datumLength = strnlen((char *) &datum, sizeof(long));
                result += string((char *) &datum, datumLength);
                if(datumLength < sizeof(long))
                    break;
            }
            else
                result += string((char *) &datum, sizeof(long));
        }

        return result;
    }

    std::string Debug::formatToAddress(unsigned long long address)
    {
        char addressString[17];

        snprintf(addressString, 17, "%016llx", address);

        return string("0x") + addressString;
    }

    void Debug::logPtraceSysCall(pid_t shellPid, uint16_t sysCallId, bool returnedFromSysCall, unsigned long long result, unsigned long long firstArgument, unsigned long long secondArgument, unsigned long long thirdArgument, unsigned long long fourthArgument, std::string fileName, int lineNo, std::string functionName)
    {
        const static uint8_t maxStringLength = 32;
        string message = "syscall: ";

        string sysCallName;
        if(sysCallId < MAX_NUMBER_OF_SYSCALLS)
            sysCallName = syscalls[sysCallId];
        if(sysCallName.empty())
            sysCallName = "syscall" + std::to_string(sysCallId);


        switch(sysCallId)
        {
            case SYS_read:
                if(returnedFromSysCall)
                    message += (result == (unsigned long long) -1 ? "-1" : std::to_string((size_t) result)) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ", \"" + (returnedFromSysCall ? __debug_make_bytes_printable(peekData(shellPid, (char *) secondArgument, (size_t) min<unsigned long long>(thirdArgument, maxStringLength))) : "")
                        + (maxStringLength < thirdArgument || returnedFromSysCall == true ? "[…]" : "") + "\""
                        + ", " + std::to_string((size_t) thirdArgument)
                        + ")";
                break;
            case SYS_write:
                if(returnedFromSysCall)
                    message += (result == (unsigned long long) -1 ? "-1" : std::to_string((size_t) result)) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ", \"" + __debug_make_bytes_printable(peekData(shellPid, (char *) secondArgument, (size_t) min<unsigned long long>(thirdArgument, maxStringLength)))
                        + (maxStringLength < thirdArgument || returnedFromSysCall == true ? "[…]" : "") + "\""
                        + ", " + std::to_string((size_t) thirdArgument)
                        + ")";
                break;
            case SYS_close:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ")";
                break;
            case SYS_stat:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(\"" + peekData(shellPid, (char *) firstArgument, -1) + "\""
                        + ", " + formatToAddress(secondArgument)
                        + ")";
                break;
            case SYS_fstat:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ", " + formatToAddress(secondArgument)
                        + ")";
                break;
            case SYS_openat:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + ((int) firstArgument == AT_FDCWD ? string("AT_FDCWD") : std::to_string((int) firstArgument))
                        + ", \"" + __debug_make_bytes_printable(peekData(shellPid, (char *) secondArgument, -1)) + "\""
                        + ", " + std::to_string((int) thirdArgument)
                        + ")";
                break;
            case SYS_rt_sigprocmask:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ", " + formatToAddress(secondArgument)
                        + ", " + formatToAddress(thirdArgument)
                        + ", " + std::to_string((size_t) fourthArgument)
                        + ")";
                break;
            case SYS_access:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + peekData(shellPid, (char *) firstArgument, -1)
                        + ", " + std::to_string((int) secondArgument)
                        + ")";
                break;
            case SYS_dup2:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ", " + std::to_string((int) secondArgument)
                        + ")";
                break;
            case SYS_fcntl:
                if(returnedFromSysCall)
                    message += std::to_string((int) result) + " = ";
                message += sysCallName
                        + "(" + std::to_string((int) firstArgument)
                        + ", " + (secondArgument == 0 ? string("F_DUP_FD") :  std::to_string((int) secondArgument))
                        + ", …"
                        + ")";
                break;
/*            case SYS_fstat:
                struct stat statbuf;
                message += "(" + std::to_string(firstArgument)
                        + ", \"" + __debug_make_bytes_printable(peekData(shellPid, (char *) secondArgument, (size_t) min<unsigned long long>(thirdArgument, maxStringLength)))
                        + (maxStringLength < thirdArgument ? "[…]" : "") + "\""
                        + ", " + std::to_string((size_t) thirdArgument)
                        + ")";
                break;
*/            default:
                if(returnedFromSysCall)
                    message += (result == (unsigned long long) -1 ? "-1" : std::to_string(result)) + " = ";
                message += sysCallName
                        + "(" + formatToAddress(firstArgument)
                        + ", " + formatToAddress(secondArgument)
                        + ", " + formatToAddress(thirdArgument)
                        + ", " + formatToAddress(fourthArgument)
                        + ")";
        }
        // source: https://blog.rchapman.org/posts/Linux_System_Call_Table_for_x86_64/

        log(message, fileName, lineNo, functionName);
    }

    Debug *Debug::getInstance()
    {
        static Debug *debug = new Debug();
        return debug;
    }

    const char *Debug::syscalls[MAX_NUMBER_OF_SYSCALLS] = {/*[0] =*/ "read",/*[1] =*/ "write",
                    /*[2] =*/ "open",/*[3] =*/ "close",
                    /*[4] =*/ "stat",/*[5] =*/ "fstat",
                    /*[6] =*/ "lstat",/*[7] =*/ "poll",
                    /*[8] =*/ "lseek",/*[9] =*/ "mmap",
                    /*[10] =*/ "mprotect",/*[11] =*/ "munmap",
                    /*[12] =*/ "brk",/*[13] =*/ "rt_sigaction",
                    /*[14] =*/ "rt_sigprocmask",/*[15] =*/ "rt_sigreturn",
                    /*[16] =*/ "ioctl",/*[17] =*/ "pread64",
                    /*[18] =*/ "pwrite64",/*[19] =*/ "readv",
                    /*[20] =*/ "writev",/*[21] =*/ "access",
                    /*[22] =*/ "pipe",/*[23] =*/ "select",
                    /*[24] =*/ "sched_yield",/*[25] =*/ "mremap",
                    /*[26] =*/ "msync",/*[27] =*/ "mincore",
                    /*[28] =*/ "madvise",/*[29] =*/ "shmget",
                    /*[30] =*/ "shmat",/*[31] =*/ "shmctl",
                    /*[32] =*/ "dup",/*[33] =*/ "dup2",
                    /*[34] =*/ "pause",/*[35] =*/ "nanosleep",
                    /*[36] =*/ "getitimer",/*[37] =*/ "alarm",
                    /*[38] =*/ "setitimer",/*[39] =*/ "getpid",
                    /*[40] =*/ "sendfile",/*[41] =*/ "socket",
                    /*[42] =*/ "connect",/*[43] =*/ "accept",
                    /*[44] =*/ "sendto",/*[45] =*/ "recvfrom",
                    /*[46] =*/ "sendmsg",/*[47] =*/ "recvmsg",
                    /*[48] =*/ "shutdown",/*[49] =*/ "bind",
                    /*[50] =*/ "listen",/*[51] =*/ "getsockname",
                    /*[52] =*/ "getpeername",/*[53] =*/ "socketpair",
                    /*[54] =*/ "setsockopt",/*[55] =*/ "getsockopt",
                    /*[56] =*/ "clone",/*[57] =*/ "fork",
                    /*[58] =*/ "vfork",/*[59] =*/ "execve",
                    /*[60] =*/ "exit",/*[61] =*/ "wait4",
                    /*[62] =*/ "kill",/*[63] =*/ "uname",
                    /*[64] =*/ "semget",/*[65] =*/ "semop",
                    /*[66] =*/ "semctl",/*[67] =*/ "shmdt",
                    /*[68] =*/ "msgget",/*[69] =*/ "msgsnd",
                    /*[70] =*/ "msgrcv",/*[71] =*/ "msgctl",
                    /*[72] =*/ "fcntl",/*[73] =*/ "flock",
                    /*[74] =*/ "fsync",/*[75] =*/ "fdatasync",
                    /*[76] =*/ "truncate",/*[77] =*/ "ftruncate",
                    /*[78] =*/ "getdents",/*[79] =*/ "getcwd",
                    /*[80] =*/ "chdir",/*[81] =*/ "fchdir",
                    /*[82] =*/ "rename",/*[83] =*/ "mkdir",
                    /*[84] =*/ "rmdir",/*[85] =*/ "creat",
                    /*[86] =*/ "link",/*[87] =*/ "unlink",
                    /*[88] =*/ "symlink",/*[89] =*/ "readlink",
                    /*[90] =*/ "chmod",/*[91] =*/ "fchmod",
                    /*[92] =*/ "chown",/*[93] =*/ "fchown",
                    /*[94] =*/ "lchown",/*[95] =*/ "umask",
                    /*[96] =*/ "gettimeofday",/*[97] =*/ "getrlimit",
                    /*[98] =*/ "getrusage",/*[99] =*/ "sysinfo",
                    /*[100] =*/ "times",/*[101] =*/ "ptrace",
                    /*[102] =*/ "getuid",/*[103] =*/ "syslog",
                    /*[104] =*/ "getgid",/*[105] =*/ "setuid",
                    /*[106] =*/ "setgid",/*[107] =*/ "geteuid",
                    /*[108] =*/ "getegid",/*[109] =*/ "setpgid",
                    /*[110] =*/ "getppid",/*[111] =*/ "getpgrp",
                    /*[112] =*/ "setsid",/*[113] =*/ "setreuid",
                    /*[114] =*/ "setregid",/*[115] =*/ "getgroups",
                    /*[116] =*/ "setgroups",/*[117] =*/ "setresuid",
                    /*[118] =*/ "getresuid",/*[119] =*/ "setresgid",
                    /*[120] =*/ "getresgid",/*[121] =*/ "getpgid",
                    /*[122] =*/ "setfsuid",/*[123] =*/ "setfsgid",
                    /*[124] =*/ "getsid",/*[125] =*/ "capget",
                    /*[126] =*/ "capset",/*[127] =*/ "rt_sigpending",
                    /*[128] =*/ "rt_sigtimedwait",/*[129] =*/ "rt_sigqueueinfo",
                    /*[130] =*/ "rt_sigsuspend",/*[131] =*/ "sigaltstack",
                    /*[132] =*/ "utime",/*[133] =*/ "mknod",
                    /*[134] =*/ "uselib",/*[135] =*/ "personality",
                    /*[136] =*/ "ustat",/*[137] =*/ "statfs",
                    /*[138] =*/ "fstatfs",/*[139] =*/ "sysfs",
                    /*[140] =*/ "getpriority",/*[141] =*/ "setpriority",
                    /*[142] =*/ "sched_setparam",/*[143] =*/ "sched_getparam",
                    /*[144] =*/ "sched_setscheduler",/*[145] =*/ "sched_getscheduler",
                    /*[146] =*/ "sched_get_priority_max",/*[147] =*/ "sched_get_priority_min",
                    /*[148] =*/ "sched_rr_get_interval",/*[149] =*/ "mlock",
                    /*[150] =*/ "munlock",/*[151] =*/ "mlockall",
                    /*[152] =*/ "munlockall",/*[153] =*/ "vhangup",
                    /*[154] =*/ "modify_ldt",/*[155] =*/ "pivot_root",
                    /*[156] =*/ "",/*[157] =*/ "prctl",
                    /*[158] =*/ "arch_prctl",/*[159] =*/ "adjtimex",
                    /*[160] =*/ "setrlimit",/*[161] =*/ "chroot",
                    /*[162] =*/ "sync",/*[163] =*/ "acct",
                    /*[164] =*/ "settimeofday",/*[165] =*/ "mount",
                    /*[166] =*/ "",/*[167] =*/ "swapon",
                    /*[168] =*/ "swapoff",/*[169] =*/ "reboot",
                    /*[170] =*/ "sethostname",/*[171] =*/ "setdomainname",
                    /*[172] =*/ "iopl",/*[173] =*/ "ioperm",
                    /*[174] =*/ "",/*[175] =*/ "init_module",
                    /*[176] =*/ "delete_module",/*[177] =*/ "",
                    /*[178] =*/ "",/*[179] =*/ "quotactl",
                    /*[180] =*/ "",/*[181] =*/ "",
                    /*[182] =*/ "",/*[183] =*/ "",
                    /*[184] =*/ "",/*[185] =*/ "",
                    /*[186] =*/ "gettid",/*[187] =*/ "readahead",
                    /*[188] =*/ "setxattr",/*[189] =*/ "lsetxattr",
                    /*[190] =*/ "fsetxattr",/*[191] =*/ "getxattr",
                    /*[192] =*/ "lgetxattr",/*[193] =*/ "fgetxattr",
                    /*[194] =*/ "listxattr",/*[195] =*/ "llistxattr",
                    /*[196] =*/ "flistxattr",/*[197] =*/ "removexattr",
                    /*[198] =*/ "lremovexattr",/*[199] =*/ "fremovexattr",
                    /*[200] =*/ "tkill",/*[201] =*/ "time",
                    /*[202] =*/ "futex",/*[203] =*/ "sched_setaffinity",
                    /*[204] =*/ "sched_getaffinity",/*[205] =*/ "set_thread_area",
                    /*[206] =*/ "io_setup",/*[207] =*/ "io_destroy",
                    /*[208] =*/ "io_getevents",/*[209] =*/ "io_submit",
                    /*[210] =*/ "io_cancel",/*[211] =*/ "get_thread_area",
                    /*[212] =*/ "",/*[213] =*/ "epoll_create",
                    /*[214] =*/ "",/*[215] =*/ "",
                    /*[216] =*/ "remap_file_pages",/*[217] =*/ "getdents64",
                    /*[218] =*/ "set_tid_address",/*[219] =*/ "restart_syscall",
                    /*[220] =*/ "semtimedop",/*[221] =*/ "fadvise64",
                    /*[222] =*/ "timer_create",/*[223] =*/ "timer_settime",
                    /*[224] =*/ "timer_gettime",/*[225] =*/ "timer_getoverrun",
                    /*[226] =*/ "timer_delete",/*[227] =*/ "clock_settime",
                    /*[228] =*/ "clock_gettime",/*[229] =*/ "clock_getres",
                    /*[230] =*/ "clock_nanosleep",/*[231] =*/ "exit_group",
                    /*[232] =*/ "epoll_wait",/*[233] =*/ "epoll_ctl",
                    /*[234] =*/ "tgkill",/*[235] =*/ "utimes",
                    /*[236] =*/ "",/*[237] =*/ "mbind",
                    /*[238] =*/ "set_mempolicy",/*[239] =*/ "get_mempolicy",
                    /*[240] =*/ "mq_open",/*[241] =*/ "mq_unlink",
                    /*[242] =*/ "mq_timedsend",/*[243] =*/ "mq_timedreceive",
                    /*[244] =*/ "mq_notify",/*[245] =*/ "mq_getsetattr",
                    /*[246] =*/ "kexec_load",/*[247] =*/ "waitid",
                    /*[248] =*/ "add_key",/*[249] =*/ "request_key",
                    /*[250] =*/ "keyctl",/*[251] =*/ "ioprio_set",
                    /*[252] =*/ "ioprio_get",/*[253] =*/ "inotify_init",
                    /*[254] =*/ "inotify_add_watch",/*[255] =*/ "inotify_rm_watch",
                    /*[256] =*/ "migrate_pages",/*[257] =*/ "openat",
                    /*[258] =*/ "mkdirat",/*[259] =*/ "mknodat",
                    /*[260] =*/ "fchownat",/*[261] =*/ "futimesat",
                    /*[262] =*/ "newfstatat",/*[263] =*/ "unlinkat",
                    /*[264] =*/ "renameat",/*[265] =*/ "linkat",
                    /*[266] =*/ "symlinkat",/*[267] =*/ "readlinkat",
                    /*[268] =*/ "fchmodat",/*[269] =*/ "faccessat",
                    /*[270] =*/ "pselect6",/*[271] =*/ "ppoll",
                    /*[272] =*/ "unshare",/*[273] =*/ "set_robust_list",
                    /*[274] =*/ "get_robust_list",/*[275] =*/ "splice",
                    /*[276] =*/ "tee",/*[277] =*/ "sync_file_range",
                    /*[278] =*/ "vmsplice",/*[279] =*/ "move_pages",
                    /*[280] =*/ "utimensat",/*[281] =*/ "epoll_pwait",
                    /*[282] =*/ "signalfd",/*[283] =*/ "timerfd_create",
                    /*[284] =*/ "eventfd",/*[285] =*/ "fallocate",
                    /*[286] =*/ "timerfd_settime",/*[287] =*/ "timerfd_gettime",
                    /*[288] =*/ "accept4",/*[289] =*/ "signalfd4",
                    /*[290] =*/ "eventfd2",/*[291] =*/ "epoll_create1",
                    /*[292] =*/ "dup3",/*[293] =*/ "pipe2",
                    /*[294] =*/ "inotify_init1",/*[295] =*/ "preadv",
                    /*[296] =*/ "pwritev",/*[297] =*/ "rt_tgsigqueueinfo",
                    /*[298] =*/ "perf_event_open",/*[299] =*/ "recvmmsg",
                    /*[300] =*/ "fanotify_init",/*[301] =*/ "fanotify_mark",
                    /*[302] =*/ "prlimit64",/*[303] =*/ "name_to_handle_at",
                    /*[304] =*/ "open_by_handle_at",/*[305] =*/ "clock_adjtime",
                    /*[306] =*/ "syncfs",/*[307] =*/ "sendmmsg",
                    /*[308] =*/ "setns",/*[309] =*/ "getcpu",
                    /*[310] =*/ "process_vm_readv",/*[311] =*/ "process_vm_writev",
                    /*[312] =*/ "kcmp",/*[313] =*/ "finit_module",
                    /*[314] =*/ "sched_setattr",/*[315] =*/ "sched_getattr",
                    /*[316] =*/ "renameat2",/*[317] =*/ "seccomp",
                    /*[318] =*/ "getrandom",/*[319] =*/ "memfd_create",
                    /*[320] =*/ "kexec_file_load",/*[321] =*/ "bpf",
                    /*[322] =*/ "execveat",/*[323] =*/ "userfaultfd",
                    /*[324] =*/ "membarrier",/*[325] =*/ "mlock2",
                    /*[326] =*/ "copy_file_range",/*[327] =*/ "preadv2",
                    /*[328] =*/ "pwritev2",/*[329] =*/ "pkey_mprotect",
                    /*[330] =*/ "pkey_alloc",/*[331] =*/ "pkey_free",
                    /*[332] =*/ "statx",/*[333] =*/ "io_pgetevents",
                    /*[334] =*/ "rseq",/*[335] =*/ "",
                    /*[336] =*/ "",/*[337] =*/ "",
                    /*[338] =*/ "",/*[339] =*/ "",
                    /*[340] =*/ "",/*[341] =*/ "",
                    /*[342] =*/ "",/*[343] =*/ "",
                    /*[344] =*/ "",/*[345] =*/ "",
                    /*[346] =*/ "",/*[347] =*/ "",
                    /*[348] =*/ "",/*[349] =*/ "",
                    /*[350] =*/ "",/*[351] =*/ "",
                    /*[352] =*/ "",/*[353] =*/ "",
                    /*[354] =*/ "",/*[355] =*/ "",
                    /*[356] =*/ "",/*[357] =*/ "",
                    /*[358] =*/ "",/*[359] =*/ "",
                    /*[360] =*/ "",/*[361] =*/ "",
                    /*[362] =*/ "",/*[363] =*/ "",
                    /*[364] =*/ "",/*[365] =*/ "",
                    /*[366] =*/ "",/*[367] =*/ "",
                    /*[368] =*/ "",/*[369] =*/ "",
                    /*[370] =*/ "",/*[371] =*/ "",
                    /*[372] =*/ "",/*[373] =*/ "",
                    /*[374] =*/ "",/*[375] =*/ "",
                    /*[376] =*/ "",/*[377] =*/ "",
                    /*[378] =*/ "",/*[379] =*/ "",
                    /*[380] =*/ "",/*[381] =*/ "",
                    /*[382] =*/ "",/*[383] =*/ "",
                    /*[384] =*/ "",/*[385] =*/ "",
                    /*[386] =*/ "",/*[387] =*/ "",
                    /*[388] =*/ "",/*[389] =*/ "",
                    /*[390] =*/ "",/*[391] =*/ "",
                    /*[392] =*/ "",/*[393] =*/ "",
                    /*[394] =*/ "",/*[395] =*/ "",
                    /*[396] =*/ "",/*[397] =*/ "",
                    /*[398] =*/ "",/*[399] =*/ "",
                    /*[400] =*/ "",/*[401] =*/ "",
                    /*[402] =*/ "",/*[403] =*/ "",
                    /*[404] =*/ "",/*[405] =*/ "",
                    /*[406] =*/ "",/*[407] =*/ "",
                    /*[408] =*/ "",/*[409] =*/ "",
                    /*[410] =*/ "",/*[411] =*/ "",
                    /*[412] =*/ "",/*[413] =*/ "",
                    /*[414] =*/ "",/*[415] =*/ "",
                    /*[416] =*/ "",/*[417] =*/ "",
                    /*[418] =*/ "",/*[419] =*/ "",
                    /*[420] =*/ "",/*[421] =*/ "",
                    /*[422] =*/ "",/*[423] =*/ "",
                    /*[424] =*/ "pidfd_send_signal",/*[425] =*/ "io_uring_setup",
                    /*[426] =*/ "io_uring_enter",/*[427] =*/ "io_uring_register",
                    /*[428] =*/ "open_tree",/*[429] =*/ "move_mount",
                    /*[430] =*/ "fsopen",/*[431] =*/ "fsconfig",
                    /*[432] =*/ "fsmount",/*[433] =*/ "fspick",
                    /*[434] =*/ "pidfd_open",/*[435] =*/ "clone3" };
}

#endif
/*

Following command in part thx to:
https://unix.stackexchange.com/questions/445507/syscall-number-%E2%86%92-name-mapping-at-runtime

Command to create mapping of system call number to system call name:

#!/bin/bash

awk 'BEGIN { print "#include <sys/syscall.h>" }
    /p_syscall_meta/ { syscall = substr($NF, 19);
    printf "[SYS_%s] = \"%s\", \n", syscall, syscall }' /proc/kallsyms \
| gcc -E -P - \
| sort -V \
| grep "\[[0-9]" \
| awk 'BEGIN {expectedIndex = 0;}
    { actualIndex = $1;
        gsub(/[\[\]]/, "", actualIndex);
        if (actualIndex != expectedIndex)
            for (; expectedIndex < actualIndex; expectedIndex++)
                print "[" expectedIndex "] = \"\",";
        print $0; expectedIndex++ }' \
| tr -d "\n" \
| sed -e "s/^/const char *syscalls[1024] = {/; s/,$/ };/" \
| sed -e 's/,/,\n                /2;P;D' \
| cat - <(echo) # new line at the end
*/