boost：interprocess中的异常，共享内存对象删除

Question

there is a simple piece of code which I moved to main function of sample app to avoid the affecting of any other application parts:

    namespace bi = boost:interprocess;

    bi::shared_memory_object::remove("shm");
    bi::named_mutex::remove("mtx");
    bi::named_condition::remove("cnd");

just first line raise an exception in internal boost interprocess code: in windows_intermodule_singleton.hpp, 118 (v 1.60.0) bolded line is where it's happening. Win64, VC v19, Windows 10

     ...
     caster.addr = m;
     BOOST_ASSERT((caster.addr_uint64 & boost::uint64_t(3)) == 0);
     max_count = boost::uint32_t(caster.addr_uint64 >> 32);
     **initial_count = boost::uint32_t(caster.addr_uint64);**
     initial_count = initial_count/4;
     //Make sure top two bits are zero
     BOOST_ASSERT((max_count & boost::uint32_t(0xC0000000)) == 0);
     //Set quasi-top bit
     max_count |= boost::uint32_t(0x40000000);
     ...

ANy idea why this happens? can this be related with x64 memory model?

Answer 1

这不是一个例外，我不注意，使用所有/ RTC编译器设置进行编译，并且该位置看起来像潜在的数据丢失（？）8字节至4。windbg报告：_RTC_Check_8_to_4