[Boost-users] [io_state_savers] [serialization] Purify shows "Free memory read" in unittest, Crash with real life data

From: Markus Bernhardt (Markus.Bernhardt_at_[hidden])
Date: 2007-07-07 07:55:01

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This is harmfull.

Although my unittests are working correct, my application crashes with
real life data after serializing 25GB data to disk in the destructor
~basic_binary_iprimitive.

I will setup an analysis with real life data, but this will take a
while, because the debugger slows things "a little bit".

I have an idea what perhaps causes the problem and will look into it.

Kind regards,
Markus

Markus Bernhardt schrieb:
> @ Ramey:
> sorry. I Haven't known there's a seperate project for this.
> 
> @ all:
> 
> I'm using:
> Boost 1.32.0
> OS: Solaris 10 64-bit Sparc and AMD64
> CC: Sun C++ 5.8 Patch 121018-10 2007/02/21
> 
> Kind regards,
> Markus
> 
> Robert Ramey schrieb:
>>> Wouldn't this be an issue to be addressed in the "i/o state saver" library?
>>>
>>> Robert Ramey
>>>
>>> Markus Bernhardt wrote:
>>> Hi,
>>>
>>> I'm using purify to check my app.
>>> Using serialization, I see the following FMR:
>>>
>>> #################
>>>
>>> FMR: Free memory read
>>>   This is occurring while in thread 3:
>>>   std::locale::~locale() [libstlport.so.1]
>>>   boost::scoped_ptr<std::locale>::~scoped_ptr()
>>>   boost::archive::basic_binary_iprimitive<boost::archive::
>>>     binary_iarchive,std::basic_istream
>>>     <char,std::char_traits<char> > >::~basic_binary_iprimitive()
>>>   boost::archive::binary_iarchive_impl
>>>     <boost::archive::binary_iarchive>::~binary_iarchive_impl()
>>>
>>>   boost::archive::binary_iarchive::~binary_iarchive()
>>>   void de::scmb::bm::seri::Serializer::serialize
>>>     (std::basic_ifstream<char,std::char_traits<char> >&,
>>>     de::scmb::bm::core::Instance&)
>>>
>>> Reading 8 bytes from 0x100312228 in the heap.
>>> Address 0x100312228 is at the beginning of a freed block of 80 bytes.
>>>
>>> This block was allocated from thread 3:
>>>   malloc         [rtlib.o]
>>>   c2n6Fl_Pv___1  [libCrun.so.1]
>>>   void*operator new(unsigned long) [rtlib.o]
>>>   std::locale::locale(std::_Locale_impl*,bool) [libstlport.so.1]
>>>   std::locale::locale<boost::archive::codecvt_null<char> >
>>>     (const std::locale&,__type_0*) [libboost_serialization-sw-d.a]
>>>   std::locale*boost::archive::add_facet
>>>     <boost::archive::codecvt_null<char> >(const
>>>     std::locale&,__type_0*) [libboost_serialization-sw-d.a]
>>>
>>> There have been 0 frees since this block was freed from thread 3:
>>>   free           [rtlib.o]
>>>   c2k6FPv_v___1  [libCrun.so.1]
>>>   void operator delete(void*) [rtlib.o]
>>>   boost::io::basic_ios_locale_saver
>>>     <char,std::char_traits<char> >::~basic_ios_locale_saver()
>>>     [libboost_serialization-sw-d.a]
>>>   boost::archive::basic_binary_iprimitive
>>>     <boost::archive::binary_iarchive,std::basic_istream
>>>       <char,std::char_traits<char> > >::~basic_binary_iprimitive()
>>>     [libboost_serialization-sw-d.a]
>>>   boost::archive::binary_iarchive_impl
>>>     <boost::archive::binary_iarchive>::~binary_iarchive_impl()
>>>     [Serializer.cpp]
>>>
>>> #################
>>>
>>> Has anyone seen this before.
>>>
>>> Looks like std::locale is using a buffer with 80 bytes size, which is
>>> shared between std::locale objetcs and get deleted by the destruction
>>> of a basic_ios_locale_saver object, which has a std::locale object.
>>>
>>> Is this guess correct ??
>>>
>>> Can this become a problem ??
>>>
>>> Kind regards,
>>> Markus
>>>
>>> --
>>> Software Consulting
>>> Markus Bernhardt GmbH
>>> Spieljochstr. 34
>>> 81825 München
>>>
>>> Fon: [phone]
>>> Fax: [phone]
>>> www: http://www.scmb.de
>>>
>>> Geschäftsführung Markus Bernhardt
>>> Handelsregister AG München HRB 125966
>>> USt-Id DE201885231
>>>
> 
>>> ------------------------------------------------------------------------
> 
>>> _______________________________________________
>>> Boost-users mailing list
>>> Boost-users_at_[hidden]
>>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 
> 
> --
> Software Consulting
> Markus Bernhardt GmbH
> Spieljochstr. 34
> 81825 München
> 
> Fon: [phone]
> Fax: [phone]
> www: http://www.scmb.de	
> 
> Geschäftsführung Markus Bernhardt
> Handelsregister AG München HRB 125966
> USt-Id DE201885231
> 

- --
Software Consulting
Markus Bernhardt GmbH
Spieljochstr. 34
81825 München

Fon: [phone]
Fax: [phone]
www: http://www.scmb.de	

Geschäftsführung Markus Bernhardt
Handelsregister AG München HRB 125966
USt-Id DE201885231

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