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#include <cstdlib>
#include <cstdio>
#include <iostream>
#include <cstring>
#include <vector>
#include <algorithm>
#include "config.h"
#include <sys/types.h>
#include <sys/shm.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
using namespace std;
static u8* trace_bits;
static s32 shm_id; /* ID of the SHM region */
static int __afl_temp_data;
static pid_t __afl_fork_pid;
static unsigned short prev_id;
void initAflForkServer()
{
char *shm_env_var = getenv(SHM_ENV_VAR);
if(!shm_env_var) {
printf("Error getting shm\n");
return;
}
shm_id = atoi(shm_env_var);
trace_bits = (u8*)shmat(shm_id, NULL, 0);
if(trace_bits == (u8*)-1) {
perror("shmat");
return;
}
// enter fork() server thyme!
int n = write(FORKSRV_FD+1, &__afl_temp_data,4);
if( n!=4 ) {
printf("Error writting fork server\n");
return;
}
while(1) {
n = read(FORKSRV_FD,&__afl_temp_data,4);
if(n != 4) {
printf("Error reading fork server %x\n",__afl_temp_data);
return;
}
__afl_fork_pid = fork();
if(__afl_fork_pid < 0) {
printf("Error on fork()\n");
return;
}
if(__afl_fork_pid == 0) {
close(FORKSRV_FD);
close(FORKSRV_FD+1);
break;
} else {
// parrent stuff
n = write(FORKSRV_FD+1,&__afl_fork_pid, 4);
pid_t temp_pid = waitpid(__afl_fork_pid,&__afl_temp_data,2);
if(temp_pid == 0) {
return;
}
n = write(FORKSRV_FD+1,&__afl_temp_data,4);
}
}
}
// Should be called on basic block entry
void bbCallback(unsigned short id)
{
if(trace_bits) {
trace_bits[prev_id ^ id]++;
prev_id = id >> 1;
}
}
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