我无法通过 shell 命令 ipcs 查看 boost::interprocess 创建的共享内存

Question

我正在使用 boost 测试共享内存。另外，我注意到我可以使用 shell 命令“ipcs -m”来检查系统中现在有多少共享内存。在我运行下面的代码后，应用程序运行良好，但是，我看不到应用程序通过命令“ipcs -m”创建的共享内存有人能告诉我为什么吗？我应该怎么做才能检查除了ipcs之外的共享内存？

#include <boost/interprocess/shared_memory_object.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <iostream>

int main(int argc, char** argv) 
{
    boost::interprocess::shared_memory_object shdmem(boost::interprocess::open_or_create,
        "shm_data", boost::interprocess::read_write);
    shdmem.truncate(1024);
    std::cout << "created shm: " << shdmem.get_name() << std::endl;
    boost::interprocess::offset_t size;
    if (shdmem.get_size(size)) 
    {
        std::cout << "shm size: " << size << std::endl;
    }
    boost::interprocess::mapped_region region(shdmem, boost::interprocess::read_write);
    char *s = static_cast<char*>(region.get_address());
    strcpy(s, "Hello, world!");
    std::cout << "write shm finished." << std::endl;
    boost::interprocess::mapped_region region2(shdmem, boost::interprocess::read_only);
    char *i2 = static_cast<char*>(region2.get_address());
    std::cout << "read shm finished, value: " << i2 << std::endl;
    return 0;
}