C++甚至在进入函数之前就会出现seg错误

Question

我有一个问题,我尝试压缩文件的数据.一切都适用于压缩调用,但它不是压缩调用本身,因为在它之前抛出了segfault.显示我的代码将使它更清晰:

std::cout << "FILENAME: ";
std::cin >> filename;

if(!fileExists(filename))
{
    std::cout << "ERR: FILE NOT FOUND." << std::endl;
    continue;
}

std::cout << "Compressing file data...";
writeFile(filename, zlib_compress(readFile(filename)));
std::cout << " Done." << std::endl;

在函数zlib_compress ...

std::string zlib_compress(const std::string& str)
{
    std::cout << "DEBUG" << std::endl;

    z_stream zs;                        // z_stream is zlib's control structure
    memset(&zs, 0, sizeof(zs));

    if (deflateInit(&zs, 9) != Z_OK)
        std::cout << "deflateInit failed while compressing." << std::endl;

    zs.next_in = (Bytef*)str.data();
    zs.avail_in = str.size();           // set the z_stream's input

    int ret;
    char outbuffer[1073741824];
    std::string outstring;

    // retrieve the compressed bytes blockwise
    do
    {
        zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
        zs.avail_out = sizeof(outbuffer);

        ret = deflate(&zs, Z_FINISH);

        if (outstring.size() < zs.total_out)
        {
            // append the block to the output string
            outstring.append(outbuffer, zs.total_out - outstring.size());
        }
    } while(ret == Z_OK);

    deflateEnd(&zs);

    if(ret != Z_STREAM_END) // an error occurred that was not EOF
    {
        std::ostringstream oss;
        oss << "Exception during zlib compression: (" << ret << ") " << zs.msg;
        std::cout << oss.str();
    }

    return outstring;
}

我知道,我知道,这个功能需要工作,我只是从某个地方C&P来试试.

但事情是这样的:

std::cout << "DEBUG" << std::endl;是永远不会被调用.编译器说seg故障来自这里:

  std::string zlib_compress(const std::string& str)
> {

但为什么...？它早先工作了.我只是不知道出了什么问题!

编辑:调试器输出.

#0 00000000 0x00402cbb in __chkstk_ms() (??:??)
#1 004013BE zlib_compress(str=...) (C:\Users\***\Documents\Work\Programming\Compressor\z.cpp:5)
#2 00401DDA _fu15___ZSt4cout() (C:\Users\***\Documents\Work\Programming\Compressor\main.cpp:80)

Answer 1

char outbuffer [1073741824];

这太大了,不能放在堆栈上