Re: [Boost-users] [boost.interprocess] Construct boost::basic_string with managed_shared_memory as memory soure crash.

Subject: Re: [Boost-users] [boost.interprocess] Construct boost::basic_string with managed_shared_memory as memory soure crash.
From: james (dirtydroog_at_[hidden])
Date: 2018-08-02 15:16:45

Your aliases are pretty much identical to what we use, and we have no
issues.
I'd wager your issue is elsewhere in your program, however we are using
Boost 1.58 I think.

On Thu, Aug 2, 2018 at 10:31 AM, Zhiming Wang via Boost-users <
boost-users_at_[hidden]> wrote:

> Hi,
>
> I am using boost 1.65.1 interprocess lib, and tried to construct a string
> that is safe to store in a managed_shared_memory.
>
> Types  are defined as below:
>
>  using namespace boost::interprocess;
>  using ShmSegment_t = boost::interprocess::managed_shared_memory;
>
>
>  using SegmentMgr_t = boost::interprocess::managed_shared_memory::segment_
> manager;
>
>
>  template <typename T>
>
>
>  using Allocator_t = boost::interprocess::allocator<T, SegmentMgr_t>;
>
>  using String_t = boost::interprocess::basic_string<char,
> std::char_traits<char>, Allocator_t<char>>;
>
> Code in problem is as below:
>
> using namespace boost::interprocess;
> ShmSegment_t segment(open_or_create, "Test",  1L << 31);
> const std::string stdStr("std_str");
> String_t ipcStr( stdStr.c_str(), segment.get_segment_manager());  *//
> oops, crashed! *
>
> Crash backtrace is as below:
>
> #0  0x00007ffff7ab735c in boost::interprocess::rbtree_
> best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>::get_size (this=0x441f0ff40024)
> at /usr/include/boost/interprocess/mem_algo/rbtree_best_fit.hpp:593
>  #1  0x00007ffff7ab157a in boost::interprocess::segment_
> manager_base<boost::interprocess::rbtree_best_fit<
> boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0u
> l> >::get_size (this=0x441f0ff40024) at /usr/include/boost/
> interprocess/segment_manager.hpp:113
> #2  0x00007ffff7ab002d in boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boost::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index>
> >::max_size (this=0x7fffeeffbe80) at /usr/include/boost/
> interprocess/allocators/allocator.hpp:164
> #3  0x00007ffff7aaf34d in boost::container::allocator_
> traits<boost::interprocess::allocator<char, boost::interprocess::segment_manager<char,
> boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_fa
> mily, boost::interprocess::offset_ptr<void, long, unsigned long, 0ul>,
> 0ul>, boost::interprocess::iset_index> > >::priv_max_size (a=...) at
> /usr/include/boost/container/allocator_traits.hpp:397
> #4  boost::container::allocator_traits<boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boost::interprocess::mutex_family, boost::interproc
> ess::offset_ptr<void, long, unsigned long, 0ul>, 0ul>,
> boost::interprocess::iset_index> > >::max_size (a=...) at
> /usr/include/boost/container/allocator_traits.hpp:331
> #5  boost::container::container_detail::basic_string_base<
> boost::interprocess::allocator<char, boost::interprocess::segment_manager<char,
> boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_famil
> y, boost::interprocess::offset_ptr<void, long, unsigned long, 0ul>, 0ul>,
> boost::interprocess::iset_index> > >::max_size (this=0x7fffeeffbe80) at
> /usr/include/boost/container/string.hpp:354
> #6  0x00007ffff7aae68a in boost::container::basic_string<char,
> std::char_traits<char>, boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boo
> st::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index> >
> >::max_size (this=0x7fffeeffbe80)
>     at /usr/include/boost/container/string.hpp:1080
> #7  0x00007ffff7aadb7a in boost::container::basic_string<char,
> std::char_traits<char>, boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boo
> st::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index> >
> >::priv_reserve (this=0x7fffeeffbe80, res_arg=21,
>     null_terminate=true) at /usr/include/boost/container/string.hpp:2777
>
>
> #8  0x00007ffff7aad62a in boost::container::basic_string<char,
> std::char_traits<char>, boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boo
> st::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index> >
> >::reserve (this=0x7fffeeffbe80, res_arg=21)
>     at /usr/include/boost/container/string.hpp:1141
>
> #9  0x00007ffff7aacbdf in boost::container::basic_string<char,
> std::char_traits<char>, boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boo
> st::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index> >
> >::assign (this=0x7fffeeffbe80,
>     first=0x7fff5c000d60 "std_str", last=0x7fff5c000d75 "") at
> /usr/include/boost/container/string.hpp:1494
> #10 0x00007ffff7aac719 in boost::container::basic_string<char,
> std::char_traits<char>, boost::interprocess::allocator<char,
> boost::interprocess::segment_manager<char, boost::interprocess::rbtree_
> best_fit<boo
> st::interprocess::mutex_family, boost::interprocess::offset_ptr<void,
> long, unsigned long, 0ul>, 0ul>, boost::interprocess::iset_index> >
> >::basic_string (this=0x7fffeeffbe80,
>     s=0x7fff5c000d60 "std_str", a=...) at /usr/include/boost/container/
> string.hpp:741
>
> I tried "p m_header" within GDB at /usr/include/boost/
> interprocess/mem_algo/rbtree_best_fit.hpp:593, and GDB told me the memory
> is not accessable.
> What's worse is that the issue seems not happening in very code path,
> that's it sometimes works and sometimes fails.
>
> Any insight is appreciated. Thanks.
>
>
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