this is a part of my socket client , receive buffer is small than server's send buffer, so I need to realloc buffer, but it throw error like this:
malloc: *** error for object 0x7fd44ad00018: incorrect checksum for freed object - object was probably modified after being freed.
my code :
char recv_buf[MAX_RECV_LINE] = "";
while (fgets(buf, MAX_SEND_LINE, stdin) != NULL) {
write(servfd, buf, strlen(buf));
char *recv_data = malloc(MAX_RECV_LINE);
bzero(recv_data, MAX_SEND_LINE);
int recv_size = 0;
while (1) {
FD_ZERO(&readfds);
FD_SET(servfd, &readfds);
select(servfd + 1, &readfds, NULL, NULL, &timeout);
if (FD_ISSET(servfd, &readfds)) {
bzero(recv_buf, MAX_RECV_LINE);
size_t recv_buf_len = recv(servfd, recv_buf, MAX_RECV_LINE, 0);
if (recv_buf_len == 0) {
printf("Server is closed.\n");
close(servfd);
exit(0);
}
recv_data = realloc(recv_data, recv_size + recv_buf_len);
if (recv_data == NULL) {
exit(0);
}
printf("realloc: %lu\n", recv_size + recv_buf_len);
memcpy(recv_data + recv_size, recv_buf, recv_buf_len);
recv_size += recv_buf_len;
} else {
break;
}
}
printf("total count: %d\n", recv_size);
printf("Message: %s", recv_data);
free(recv_data);
}
and recv_data can't get the completely message