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/*
* src/chaos.c
* (c) 2021 Jonas Gunz <himself@jonasgunz.de>
* License: MIT
*/
/**
* Randomly inject errors in library functions to check resiliency
*/
#if defined(_CHAOS) && defined(_GNU_SOURCE)
#warning "CHAOS Mode enabled"
#include <dlfcn.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
void* malloc (size_t size) {
int fd;
uint16_t rand;
void* (*realmalloc)(size_t size) =
(void* (*)(size_t size)) dlsym(RTLD_NEXT, "malloc");
fd = open("/dev/urandom", O_RDONLY);
read(fd, &rand, 2);
close(fd);
if( rand < 1000 ) {
errno = ENOMEM;
return NULL;
}
return realmalloc(size);
}
#endif
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