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On 07/09/2012 11:20 PM, John Ralls
wrote:
I am actually running OSX (Lion 10.7) as a virtual machine on a Linux host. As such, it run a bit slowly. It may take me a while to rebuild the libraries with debugging. But I will give it a try. Here is the actual console message and the back trace from gdb (only my program was compiled with debugging).On Jul 10, 2012, at 2:46 AM, Jim Charlton wrote:I am porting some gtkmm-3.0 code from Linux (Ubuntu) to Mac OS X (LION) on an x86_64 machine. I have struggled to get gtkmm-3.0 and all of its dependencies installed but have managed to do so with jhbuild. One last problem remains. At one point in my code, I copy the image in a Gdk::Window associated with a DrawingArea object to a Pixbuf. I later use cairo to redraw this to restore the image. The Linux code uses Gdk::Pixbuf::create() to copy the contents of the Gdk::Window to a Pixbuf. That code segfaults with a bad_alloc error on the MAC. Is there another way to do that? Is there a way to copy the image in the Gdk::Window to a Cairo quartz surface?I'm not familiar enough with pixbufs to help with a workaround, but I'd appreciate a bug report in bugzilla with a good stacktrace. If you didn't already, please rebuild with debugging symbols for at least cairo, gtkmm, gtk+, and gtk-pixbuf. Better still if you can debug into the segfault a bit and find out where the bad pointer is coming from. Regards, John Ralls (myprog:480): glibmm-CRITICAL **: Glib::Interface::Interface(const Glib::Interface_Class&): assertion `gobject_ != 0' failed (myprog:480): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed (myprog:480): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed (myprog:480): glibmm-ERROR **: unhandled exception (type std::exception) in signal handler: what: std::bad_alloc Program received signal SIGTRAP, Trace/breakpoint trap. 0x0000000101a64a34 in g_logv () (gdb) bt #0 0x0000000101a64a34 in g_logv () #1 0x0000000101a64c8d in g_log () #2 0x000000010130737b in (anonymous namespace)::glibmm_unexpected_exception () #3 0x0000000101307709 in Glib::exception_handlers_invoke () #4 0x00000001003327d3 in Gtk::Widget_Class::motion_notify_event_callback () #5 0x0000000100d94fec in _gtk_marshal_BOOLEAN__BOXEDv () #6 0x00000001019a2e5a in g_type_class_meta_marshalv () #7 0x00000001019a2878 in _g_closure_invoke_va () #8 0x00000001019c7263 in g_signal_emit_valist () #9 0x00000001019c8c84 in g_signal_emit () #10 0x0000000100f9b044 in gtk_widget_event_internal () #11 0x0000000100f9a474 in gtk_widget_event () #12 0x0000000100d94743 in propagate_event_up () #13 0x0000000100d94b5d in propagate_event () #14 0x0000000100d94c7b in gtk_propagate_event () #15 0x0000000100d93205 in gtk_main_do_event () #16 0x000000010144b003 in _gdk_event_emit () #17 0x000000010147a9d8 in gdk_event_dispatch () #18 0x0000000101a586e0 in g_main_dispatch () #19 0x0000000101a59584 in g_main_context_dispatch () #20 0x0000000101a597e7 in g_main_context_iterate () #21 0x0000000101a59d84 in g_main_loop_run () #22 0x0000000100d9250b in gtk_main () #23 0x00000001002001fb in Gtk::Main::run_impl () #24 0x000000010020035c in Gtk::Main::run () #25 0x000000010001e480 in main (argc=1, argv=0x7fff5fbff100) at main.cc:489 (gdb) |