On 11/15/2016 10:47 PM, Hazen Babcock wrote: >> >> If I recall correctly example 2 moves through the pages in a unique >> but legitimate way that other examples do not use so that may be >> triggering this issue for the qt devices. So I plan to take a look >> later when I have finished up some other PLplot issues I am currently >> dealing with unless you are able to solve this issue first on your own. >> >> Assuming you do want to investigate further on your own, I would try >> compiling with >> >> export CFLAGS="-g" >> export CXXFLAGS="-g" >> >> (so the valgrind results properly identify code lines and you can >> attach a gdb session (if you like) whenever valgrind finds a memory >> management issue. Then run valgrind (with --db-attach=yes) on example >> 2 with familying and a variety of qt devices to see if they all have >> memory management issues and exactly what part of our qt code is >> generating those. My guess is it is something one or all of our qt >> devices does wrong for the end-of-page processing in familying mode >> for the unique way example 2 navigates through its two pages. > > Apparently --db-attach has been deprecated. My valgrind results are > attached, but I'm not sure they tell us that much as (naturally) the > example does not segfault when run in the context of valgrind. > > I also tried running it in gdb, where it did segfault with the following > backtrace: > > (gdb) backtrace > #0 0x00007fffedf1012d in gtk_container_add () from > /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 .. > #18 0x0000000000400e5c in main (argc=1, argv=0x7fffffffdf38) at > /home/hbabcock/Code/plplot/examples/c/x02c.c:28 > > One thing that at least looks suspicious is frame #10: > initQtApp (isGUI=true) > > Maybe isGUI should be false for the non-interactive devices?
Never mind, I see that we have previously discussed isGUI and why it should be true in 2010 in the thread: "tiffqt device hangs in test_noninteractive". -Hazen ------------------------------------------------------------------------------ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
