Re: [Boost-users] [io_state_savers] Purify shows "Free memory read" in ~basic_binary_iprimitive

From: Robert Ramey (ramey_at_[hidden])
Date: 2007-07-06 12:48:36

BTW - I'm not sure where this problem is located. I just
found a stream.sync in the destructor or the archive - this
seems to me that it should be OK from looking at it.

Really I have no idea about this.

Robert Ramey

Markus Bernhardt wrote:
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> @ 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
>>
>
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>
> - --
> 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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