Launchpad has imported 1 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=81874.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2014-07-29T12:20:17+00:00 Alberto Salvia Novella wrote: I looked at the implementation of cairo-ft-font.c and it seems that there are huge multi-threading violations in cairo. The reason is that FreeType API documentation clearly states: In multi-threaded applications, make sure that the same FT_Library object or any of its children doesn't get accessed in parallel. Cairo initializes FT_Library for its font map and there's a lock for that, however it's only used for font map manipulations, the actual FT_ library calls are completely unprotected with that lock, although they should be! What adds to the injury is that cairo-ft-font.c even has this comment on one of its functions: You must be careful when using this function in a library or in a threaded application, because freetype's design makes it unsafe to call freetype functions simultaneously from multiple threads, (even if using distinct FT_Face objects) Reply at: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1199571/comments/15 ** Changed in: libcairo Status: Unknown => Confirmed ** Changed in: libcairo Importance: Unknown => Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1199571 Title: Huge multi-threading violations in cairo To manage notifications about this bug go to: https://bugs.launchpad.net/libcairo/+bug/1199571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
