Boost C++ Libraries: Ticket #9119: memory errors and eventual segfault when using Log

attachment set

Mon, 16 Sep 2013 13:56:57 GMT

attachment → valgrind.log

valgrind output

Mon, 16 Sep 2013 13:59:20 GMT

The attached file was generated with the command:

valgrind --show-reachable=yes --dsymutil=yes --track-origins=yes ./tutorial_file 2> valgrind.log

Andrey Semashev — Mon, 16 Sep 2013 14:10:04 GMT

I believe, this is caused by #8642.

To workaround try removing all sinks prior to returning from main().

Mon, 16 Sep 2013 14:13:05 GMT

Thank you for your suggestion, however this happens during logging initialization and not prior to returning from main.

Andrey Semashev — Mon, 16 Sep 2013 14:20:09 GMT

The valgrind log you attached points to an invalid memory access during the global destructors execution. Do you have a log that shows a different crash?

attachment set

Mon, 16 Sep 2013 16:02:38 GMT

attachment → valgrind2.log

Mon, 16 Sep 2013 16:04:24 GMT

OK attached valgrind2.log that shows my application startup crashing due to this same issue. The same code does not segfault in Mac OS X but the errors are revealed in valgrind also in Mac OS X.

Mon, 16 Sep 2013 16:07:01 GMT

Please note that the last crash is triggered while invoking logging::add_file_log

Andrey Semashev — Mon, 16 Sep 2013 17:38:56 GMT

It looks like now the crash happens during global constructors stage, but still in the code related to the global locale initialization in Boost.Filesystem. I haven't seen this one before, but I don't see how it can be fixed on Boost.Log side.

keywords, owner, component changed

Andrey Semashev — Thu, 03 Oct 2013 22:12:11 GMT

keywords filesystem locale added
owner changed from Andrey Semashev to Beman Dawes
component log → filesystem

It seems the problem is isolated in Boost.Filesystem (more precisely, its global locale initialization). I'm reassigning the ticket to Boost.Filesystem maintainer, I hope he can suggest a solution.

keywords changed; cc set

Andrey Semashev — Thu, 03 Oct 2013 22:13:32 GMT

cc Andrey.Semashev@… added
keywords log,add_file_log,filesystem,locale → log add_file_log filesystem locale