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# Gnu Pth as thread library for impalad

In short, it's impossible to use Gnu Pth library with `impalad` "AS IS", i.e. without modification.

Gnu Pth:

 * Gnu Pth can't fully replace `pthreads`. It lacks some functions, some entities.
 * It doesn't provide versioned symbols

There are some `*.so` libraries (system/thirdparty) which come precompiled and they are linked against versioned symbols. Be prepared to recompile them replace somehow or just do anything. Example:

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Benchmarking

Jump to Results:

Simple experiment showed seccomp-based syscall ~5 times slower than vanila one.

Calling write syscall directly:

const unsigned count = UINT_MAX / 10000;
	unsigned i = 0;

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#!/usr/bin/env python

import sys
import re


def main():
  regexp = re.compile(r'^(\S+)\((.*)\)\s+=\s+(\d+)$')
  whitelist = ['read', 'write', 'fstat', 'lseek', 'fcntl']
  opened_fd = {}