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List:       boost
Subject:    Re: [boost] [regression] Tests for 'develop' not showing
From:       Adam Wulkiewicz <adam.wulkiewicz () gmail ! com>
Date:       2015-09-30 18:00:23
Message-ID: 560C2337.4020007 () gmail ! com
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Tom Kent wrote:
> On Tue, Sep 29, 2015 at 8:30 PM, Tom Kent<lists@teeks99.com>  wrote:
<snip>
> 
> > /home/tomkent/tmp/boost_reports/boost-reports/develop/incoming/develop/processed/CrystaX.NET-apilevel-21-armeabi.xml
> >  Merging expected results
> > Segmentation fault (core dumped)
> > 
> > I tried deleting the whole boost-reports/develop*, but that didn't seem to
> > have any affect. Any ideas how to track this down? Anyone know where the
> > dumped core goes on ubuntu?
> > 
> > I got it to produce the core file, here's what I was able to get out of it:
> tomkent@eddie:/mnt/fs1/tmp/boost_reports⟫ gdb
> boost-reports/boost_regression/stage/bin/boost_report
> boost-reports/develop/core
> GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
> Copyright (C) 2014 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html

In "normal" circumstances an XML file containing the results has around 
10 to 50 MB top, this file has 3 GB.

<snip>
> 
> Core was generated by
> `/mnt/fs1/tmp/boost_reports/boost-reports/boost_regression/stage/bin/boost_repor'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  0x00000000004472b5 in boost::re_detail::perl_matcher<char const*,
> std::allocator<boost::sub_match<char const*> >, boost::regex_traits<char,
> boost::cpp_regex_traits<char> > >::find_restart_any() ()
> Traceback (most recent call last):
> File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.
> so.6.0.19-gdb.py", line 63, in <module>
> from libstdcxx.v6.printers import register_libstdcxx_printers
> ImportError: No module named 'libstdcxx'
> (gdb) quit

Regarding the above segfault. AFAIR the only place where regex matching 
is used is here:
https://github.com/boostorg/regression/blob/develop/reports/src/add_expected_results.cpp#L232
 calling:
https://github.com/boostorg/regression/blob/develop/reports/src/add_expected_results.cpp#L75
 I've added it some time ago in order to find text phrases indicating a 
type of an error. This could be done without Regex so we could drop this 
dependency but I don't know it this would fix the problem. The whole 
call stack would be helpful.

For now I've tested the report tool on a different platform (win7, 
msvc-10) so my results may be not very reliable. In x84 it throws 
bad_alloc here: 
https://github.com/boostorg/regression/blob/develop/reports/src/xml.cpp#L352 
where the whole file is copied into an in-memory storage (vector). In 
x64 it correctly generates the files for me, but it takes a few GB of 
memory in the process.

Regards,
Adam

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