glibc/tests/Regression/bz464146-sp-corruption/testit.c

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#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>
#include <stdlib.h>
#include <netdb.h>
#include <sys/mman.h>
#include <limits.h>
#include <unistd.h>
/*
In an attempt to situate a stack frame over a 4GB boundary, we
first create a memory region which spans that boundary. The
boundary which we are trying to span is arbitrarily chosen,
just make sure does not intersect with a region already in use.
*/
#define TARGET_BOUNDARY 0x3f600000000
#define MEM_REGION_SIZE 0x200000
#define MEM_REGION_START (TARGET_BOUNDARY - (MEM_REGION_SIZE/2))
#define KLUDGE_SPACE (-0x6e68)
int proto_tcp;
int port;
void *receiver(void *);
void *sender(void *);
int main(argc,argv)
int argc;
char *argv[];
{
pthread_t server;
pthread_t client;
struct protoent *pe;
void *stack_region;
int ret;
void *stack_addr=(void *)(TARGET_BOUNDARY+KLUDGE_SPACE);
size_t stack_size = 2 * PTHREAD_STACK_MIN;
pthread_attr_t attr;
/* set TCP port and protocol number */
if (argc != 2 ) port=1027;
else port = atoi(argv[1]);
pe = getprotobyname("tcp");
proto_tcp=pe->p_proto;
if (pthread_attr_init(&attr) < 0) {
perror("pthread_attr_init\n");
exit(1);
}
/* creating the memory region */
stack_region=mmap((void *)MEM_REGION_START,
MEM_REGION_SIZE, PROT_READ|PROT_WRITE,
MAP_PRIVATE | MAP_ANON, (-1), 0);
if (stack_region == MAP_FAILED) {
perror("mmap\n");
exit(1);
}
if (pthread_create(&server, NULL , sender, NULL) != 0){
perror("pthread_create 1");
exit(1);
}
if ((ret=pthread_attr_setstack(&attr,stack_addr,stack_size))!=0)
{
perror("pthread_attr_setstack");
printf("ret = %d\n",ret);
exit(1);
}
if ((ret=pthread_create(&client, &attr, receiver, NULL)) != 0){
printf("pthread_create2 failed with %d\n",ret);
exit(1);
}
pthread_join(server, NULL);
pthread_join(client, NULL);
exit(0);
}
void *sender(void *context){
int ret;
int sfd; /* socket descriptor */
int cfd; /* connection descriptor */
struct sockaddr_in addr;
char *p;
char buffer[] = "Hello World!";
if ((sfd = socket(PF_INET, SOCK_STREAM, proto_tcp)) < 0 ) {
perror("sender socket\n");
return(NULL);
}
addr.sin_family=AF_INET;
addr.sin_port=htons(port);
p=(gethostbyname("localhost")->h_addr_list[0]);
memcpy(&(addr.sin_addr.s_addr),p,sizeof(p));
if (bind(sfd, (struct sockaddr*)&addr, sizeof addr) < 0) {
perror("sender bind\n");
return(NULL);
}
if (listen(sfd, 1) == -1){
perror("sender listen\n");
return(NULL);
}
cfd = accept(sfd, NULL, NULL);
if (cfd < 0 )
{
perror("accept\n");
return(NULL);
}
if(send(cfd, (void*) buffer, sizeof(buffer), MSG_NOSIGNAL) == -1){
perror("send");
return(NULL);
}
shutdown(cfd, SHUT_RDWR);
return(NULL);
}
void *receiver(void *context){
char buf[100];
int sfd;
struct sockaddr_in addr;
char *p;
ssize_t ret;
addr.sin_family=AF_INET;
addr.sin_port=htons(port);
p=(gethostbyname("localhost")->h_addr_list[0]);
memcpy(&(addr.sin_addr.s_addr),p,sizeof(p));
sleep(1);
if ((sfd = socket(PF_INET, SOCK_STREAM, proto_tcp)) < 0 ) {
perror("receiver socket\n");
return(NULL);
}
if(connect(sfd, (struct sockaddr*)&addr, sizeof addr) == -1){
perror("connect\n");
return(NULL);
}
if ((ret = recv(sfd, (void*)buf, sizeof(buf), MSG_WAITALL))<0) {
perror("recv");
return(NULL);
}
buf[ret]='\0';
printf("received \"%s\"\n",buf);
shutdown(sfd, SHUT_RDWR);
return(NULL);
}