[boost.interprocess] Construct boost::basic_string with managed_shared_memory as memory soure crash.

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[boost.interprocess] Construct boost::basic_string with managed_shared_memory as memory soure crash.

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

Boost - Users mailing list
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 <[hidden email]> 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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Re: [boost.interprocess] Construct boost::basic_string with managed_shared_memory as memory soure crash.

Boost - Users mailing list
In reply to this post by Boost - Users mailing list
On 02/08/2018 11:31, Zhiming Wang via Boost-users 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! *

Are you are reserving 2GB of memory? Do you have enough memory in your
system? Linux overcommits by default.

Best,

Ion
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