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POboost::program_options hangs on the arm "sometimes"
 

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  1. POboost::program_options hangs on the arm "sometimes"
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    <p>Currently I am using <code>boost::program_options</code> to parse a configuration file on the BeagleBoard (ARM-based processor). My program is multi-threaded and linked against the <code>boost 1.45 multithreaded</code> libraries.</p> <p>My program just seems to hang when parsing the configuration file though</p> <pre><code>namespace po = boost::program_options; po::options_description desc("Options"); uint32_t option1=0; std::vector&lt;std::string&gt; optionsString; std::cout&lt;&lt;"Before adding options"&lt;&lt;std::endl; desc.add_options() ("option1", po::value&lt;uint32_t&gt;(&amp;option1), "...") ("finaloption", po::value&lt;std::vector&lt;std::string&gt; &gt;(&amp;optionsString)-&gt;multitoken(), "string of options"); //Never gets here std::cout&lt;&lt;"After adding options"&lt;&lt;std::endl; po::variables_map vm; std::cout&lt;&lt;"Starting program"&lt;&lt;std::endl; </code></pre> <p>The program hangs before printing out "After adding options". If I run the program through gdb stop it and do a back trace it just shows that it was on the line before the "Never gets here" comment. The top of the backtrace just has it at </p> <pre><code>#0 ?? #1 __lll_lock_wait lowlevellock.c:47 #2 __pthread_mutex_lock pthread_mutex_lock.c:61 #3 in boost::shared_ptr&lt;boost::program_options::option_description&gt;* std::__uninitialized_move_a&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt;*, boost::shared_ptr&lt;boost::program_options::option_description&gt;*, std::allocator&lt;boost::shared_ptr&lt;boost::program_option::option_description&gt; &gt; &gt;(boost::shared_ptr&lt;boost::program_optionns::option_description&gt;*, boost::shared_ptr&lt;boost::program_options::option_description&gt;*, std::allocator&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt; &gt;&amp;) () from /usr/local/lib/libboost_program_options-mt.so.1.45.0 #4 in std::vector&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt;, std::allocator&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt; &gt; &gt;::_M_insert_aux(__gnu_cxx::__normal_iterator&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt;, std::vector&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt;, std::allocator&lt;boost::shared_ptr&lt;boost::program_options::option_description&gt; const&amp;)() from /usr/local/lib/libboost_program_options-mt.so.1.45.0 #5 in boost::program_options::options_description::add(boost::shared_ptr&lt;boost::program_options::option_description&gt;) () from /usr/local/lib/libboost_program_options-mt.so.1.45.0 </code></pre> <p>...(let me know if you want more)</p> <p>Any thoughts? This program works fine on an x86 machine</p> <p>Edit: Further information, this does not seem to happen with optimizations off (compiled with -O2 this will fairly consistently occur).</p> <p>Edit2: Further analysis reveals that this still happens with optimizations off, -O0.</p>
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    1. USSam Miller
    1. USAdam A.
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    1. COCan you show what backtrace prints after #2 ?
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      1. USNeel Basu
    2. COwhy does it have space in option name ?
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      1. USNeel Basu
    3. COLook which thread is holding the lock, and look what that thread is currently doing. You might also have overwritten your lock with garbage and/or are using uninitialized lock structure.
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