[boost] [Boost-bugs] [ boost-Bugs-1509978 ] crash in boost::spirit::parse

From: SourceForge.net (noreply_at_[hidden])
Date: 2006-06-21 09:43:26

Bugs item #1509978, was opened at 2006-06-21 06:43
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: crash in boost::spirit::parse

Initial Comment:
When using boost::spirit::parse() in a multithreaded
environment with
 #define BOOST_SPIRIT_THREADSAFE
set the call to get_definition() in grammar.ipp can crash.

Here is the according code of grammar.ipp:

<snip>
# ifdef BOOST_SPIRIT_THREADSAFE              // Line 224
        static boost::thread_specific_ptr<ptr_t>
tld_helper;
        if (!tld_helper.get())
            tld_helper.reset(new ptr_t);
        ptr_t &helper = *tld_helper;
# else
</snip>

When thread 1 enters Line 224 the static tld_helper
will be initialized by running the constructor.
If now thread 2 enters this code before thread 1 has
finished the contructor of tld_helper thread 2 will
call the get() method on the uninitialized tld_helper
what leads to an access violation in tss.cpp Line 108
due a nullpointer in tss_data.

----------------------------------------------------------------------

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https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1509978&group_id=7586

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