#include <stdlib.h>
#include <stdio.h>

#define MALLOCSIZE  4096
#define BLOCK_COUNT 4096
#define FORK_COUNT     1

int main()
{
  unsigned char *p[BLOCK_COUNT] ;
  unsigned char *pc[BLOCK_COUNT] ;
  int i,j ;
  int pid ;

  fprintf(stderr,"start malloc.....\n") ;

  for( i=0 ; i<BLOCK_COUNT ; i++ ){
    p[i]=malloc(MALLOCSIZE) ;
    if( p[i]==NULL ){
      printf("malloc faild\n") ;
      exit(-1) ;
    }
    fprintf(stderr,"%d\n",i) ;
  }

  fprintf(stderr,"end malloc.....\n") ;

  for( i=0 ; i<FORK_COUNT ; i++ ){
    printf("Enter fork()\n") ;
    pid=fork() ;
    if( pid==0 ){
      fprintf(stderr,"Leave fork() child %d\n",i) ;
      for( j=0 ; j<BLOCK_COUNT ; j++ ){
        p[j]=malloc(MALLOCSIZE) ;
      }
      sleep(1) ;
      exit(0) ;
    }else if( pid>0 ){
      fprintf(stderr,"Leave fork() parent\n") ;
      //wait(0) ;
      continue ;
    }else{
      break ;
    }
  }
  
  exit(0) ;
}