我有代码从第一次迭代时崩溃的套接字接收字符串数据:
int size_data = 1024*sizeof(char);
char *data = malloc(size_data);
char *data_aux;
int br_aux=0;
int *nptr;
memset(&data[0], 0, size_data);
int br = recv(sockdata, data, size_data, 0);
data_aux = malloc(br);
while (br>0) {
br_aux = br_aux + br;
strcat(data_aux, data);
br = recv(sockdata,data, size_data, 0);
if (br > 0) {
nptr = (int *) realloc(data_aux, br+br_aux);
}
}
free(data);
printf("%s", data_aux);
free(data_aux);
没什么复杂的,但是我得到一个错误:
* 检测到 glibc./clientFTP: free(): invalid next size (normal): 0x00000000061d6420 * * ======= 回溯:========= /lib64/libc.so.6[0x366be7247f] /lib64/ libc.so.6(cfree+0x4b)[0x366be728db] ./clientFTP[0x401e39] /lib64/libc.so.6(__libc_start_main+0xf4)[0x366be1d9b4] ./clientFTP[0x400b89] ======= 内存映射: ======== 00400000-00403000 r-xp 00000000 fd:00 5396214 /home/alumno/FTP/clientFTP 00602000-00603000 rw-p 00002000 fd:00 5396214
/home/alumno/FTP/clientFTP17006d 0601 rw-p 061d6000 00:00 0
[堆] 366ba00000-366ba1c000 r-xp 00000000 fd:00 1994999
/lib64/ld-2.5.so 366bc1c000-366bc1d000 r--p 0001c000 fd:06/ ld:
069 366bc1d000-366bc1e000 rw-p 0001d000 fd:00 1994999
/lib64/ld-2.5.so 366be00000-366bf4e000 r-xp 00000000 fd:00 1995001
/lib64/libc-2.5.so 366bf4e000-366c14e000 ---p 0014e000 fd:00 1995001
/lib64/libc-2.5.so 366c14e000-366c152000 r--p 0014e000 fd:00 1995001
/lib64/libc-2.5.so 366c152000-366c153000 rw-p 00152000 fd:00 1995001
/lib64/libc-2.5.so 366c153000-366c158000 rw-p 366c153000 00:00 0 3672200000-367220d000 r-xp 00000000 fd:00 1995011
/lib64/libgcc_s-4.1.2-20080825.so.1 367220d000-367240d000 ---p 0000d000 fd:00 1995011
/lib64/libgcc_s-4.0.2-2007208 20072082 367240e000 rw-p 0000d000 fd:00 1995011
/lib64/libgcc_s-4.1.2-20080825.so.1 2b5cdf8d9000-2b5cdf8dd000 rw-p 2b5cdf8d9000 00:00 0 2b5cdf8f6000-2b5cdf8f7000 rw-p 2b5cdf8f6000 00:00 0 7fffae47e000-7fffae493000 rw-p 7ffffffe9000 00:00 0
[stack] 7fffae5fc000-7fffae600000 r-xp 7fffae5fc000 00:00 0
[vdso] ffffffffff600000-ffffffffffe00000 ---p 00000000 00:00 0
[vsyscall] 中止