Re: [Valgrind-users] debugging gtk-related memory leaks
I tried it with the debug info packages and malloc, and now there are only a few X/gtk errors. Anyone have suggestions on how to approach those? Maybe someone on the gtk-app-devel-list? Thanks, David Julian Seward wrote: Maybe you should set G_SLICE=always-malloc in the environment in order to make valgrind more useful: http://developer.gnome.org/doc/API/2.0/glib/glib-running.html I agree; from a guess I'd say that glib is using a private allocator, which confuses the issue. Unrelatedly .. It looks like the 'valgrind-3.1.1-Debian' you are using has been shipped without a set of suppressions suitable for getting rid of all the complaints of the form ==3722== Conditional jump or move depends on uninitialised value(s) ==3722==at 0x401139F: (within /lib/ld-2.3.6.so) ==3722==by 0x4006ACE: (within /lib/ld-2.3.6.so) ==3722==by 0x48A14AF: (within /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) which is a shame. It may be that if you install debug info packages for /lib/ld-2.3.6.so and/or libc-2.3.6.so, that noise will go away. J ==25785== Memcheck, a memory error detector. ==25785== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al. ==25785== Using LibVEX rev 1575, a library for dynamic binary translation. ==25785== Copyright (C) 2004-2005, and GNU GPL'd, by OpenWorks LLP. ==25785== Using valgrind-3.1.1-Debian, a dynamic binary instrumentation framework. ==25785== Copyright (C) 2000-2005, and GNU GPL'd, by Julian Seward et al. ==25785== For more details, rerun with: -v ==25785== ==25785== Syscall param write(buf) points to uninitialised byte(s) ==25785==at 0x4836783: __write_nocancel (in /lib/tls/i686/cmov/libpthread-2.3.6.so) ==25785==by 0x4D16E3E: _X11TransWrite (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D1BB54: (within /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D1BC7C: _XReply (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D01862: XInternAtom (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D160EA: XSetWMProperties (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4B90C59: (within /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4B93B25: gdk_window_new (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4B71F9B: gdk_display_open (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4B510DE: gdk_display_open_default_libgtk_only (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x497378E: gtk_init_check (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785==by 0x49737C3: gtk_init (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785== Address 0x5210FD0 is 128 bytes inside a block of size 16,384 alloc'd ==25785==at 0x480788E: calloc (vg_replace_malloc.c:279) ==25785==by 0x4D06B83: XOpenDisplay (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4B71EC1: gdk_display_open (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4B510DE: gdk_display_open_default_libgtk_only (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x497378E: gtk_init_check (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785==by 0x49737C3: gtk_init (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785==by 0x8059238: main_gui(int, char**) (gui.C:108) ==25785==by 0x804F6B1: main (time.C:83) ==25785== ==25785== Syscall param write(buf) points to uninitialised byte(s) ==25785==at 0x48367AB: (within /lib/tls/i686/cmov/libpthread-2.3.6.so) ==25785==by 0x4D16E3E: _X11TransWrite (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D1BB54: (within /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D1CEAB: _XEventsQueued (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4D08792: XPending (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4B7E9CD: _gdk_events_queue (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4B7EBCE: (within /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4E0F690: g_main_context_dispatch (in /usr/lib/libglib-2.0.so.0.1000.2) ==25785==by 0x4E129D6: (within /usr/lib/libglib-2.0.so.0.1000.2) ==25785==by 0x4E12F27: g_main_loop_run (in /usr/lib/libglib-2.0.so.0.1000.2) ==25785==by 0x4974340: gtk_main (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785==by 0x80595D3: main_gui(int, char**) (gui.C:157) ==25785== Address 0x52110F4 is 420 bytes inside a block of size 16,384 alloc'd ==25785==at 0x480788E: calloc (vg_replace_malloc.c:279) ==25785==by 0x4D06B83: XOpenDisplay (in /usr/lib/libX11.so.6.2.0) ==25785==by 0x4B71EC1: gdk_display_open (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x4B510DE: gdk_display_open_default_libgtk_only (in /usr/lib/libgdk-x11-2.0.so.0.800.17) ==25785==by 0x497378E: gtk_init_check (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785==by 0x49737C3: gtk_init (in /usr/lib/libgtk-x11-2.0.so.0.800.17) ==25785==by 0x8059238: main_gui(int, char**) (gui.C:108) ==25785==by 0x804F6B1: main (time.C:83) join engine... ==25785== ==25785== Syscall param write(buf) points to uninitialised byte(s) ==25785==
debugging gtk-related memory leaks
Hello, Could anyone offer help or advice on debugging mysterious gtk-related memory leaks and errors reported by valgrind when checking a threaded GTK+ program? The primary "potential" leak seems to be a sizeable chunk in g_thread_init, and there are quite a few errors from various unknown contexts (including g_module_open). Please take a look at the attached valgrind --leak-check=full output, and/or offer general advice on pursuing such errors and leaks, which are almost undoubtedly caused by my code, yet do not appear to come from any context I am familiar with. Is there some procedure for cleaning up g_threads, apart from adding a window "destroy" handler like gtk_main_quit? Thanks, David ==3722== Memcheck, a memory error detector. ==3722== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al. ==3722== Using LibVEX rev 1575, a library for dynamic binary translation. ==3722== Copyright (C) 2004-2005, and GNU GPL'd, by OpenWorks LLP. ==3722== Using valgrind-3.1.1-Debian, a dynamic binary instrumentation framework. ==3722== Copyright (C) 2000-2005, and GNU GPL'd, by Julian Seward et al. ==3722== For more details, rerun with: -v ==3722== ==3722== Conditional jump or move depends on uninitialised value(s) ==3722==at 0x4011394: (within /lib/ld-2.3.6.so) ==3722==by 0x4006ACE: (within /lib/ld-2.3.6.so) ==3722==by 0x48A14AF: (within /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x48A1E6A: _dl_open (in /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x45F9D27: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x45FA456: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45F9D80: dlopen (in /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45398F8: (within /usr/lib/libX11.so.6.2.0) ==3722==by 0x4539B42: _XlcDynamicLoad (in /usr/lib/libX11.so.6.2.0) ==3722==by 0x454E108: _XOpenLC (in /usr/lib/libX11.so.6.2.0) ==3722== ==3722== Conditional jump or move depends on uninitialised value(s) ==3722==at 0x401139F: (within /lib/ld-2.3.6.so) ==3722==by 0x4006ACE: (within /lib/ld-2.3.6.so) ==3722==by 0x48A14AF: (within /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x48A1E6A: _dl_open (in /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x45F9D27: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x45FA456: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45F9D80: dlopen (in /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45398F8: (within /usr/lib/libX11.so.6.2.0) ==3722==by 0x4539B42: _XlcDynamicLoad (in /usr/lib/libX11.so.6.2.0) ==3722==by 0x454E108: _XOpenLC (in /usr/lib/libX11.so.6.2.0) ==3722== ==3722== Conditional jump or move depends on uninitialised value(s) ==3722==at 0x40113AA: (within /lib/ld-2.3.6.so) ==3722==by 0x4006ACE: (within /lib/ld-2.3.6.so) ==3722==by 0x48A14AF: (within /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x48A1E6A: _dl_open (in /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x45F9D27: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x45FA456: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45F9D80: dlopen (in /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45398F8: (within /usr/lib/libX11.so.6.2.0) ==3722==by 0x4539B42: _XlcDynamicLoad (in /usr/lib/libX11.so.6.2.0) ==3722==by 0x454E108: _XOpenLC (in /usr/lib/libX11.so.6.2.0) ==3722== ==3722== Conditional jump or move depends on uninitialised value(s) ==3722==at 0x40114DA: (within /lib/ld-2.3.6.so) ==3722==by 0x4006ACE: (within /lib/ld-2.3.6.so) ==3722==by 0x48A14AF: (within /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x48A1E6A: _dl_open (in /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x45F9D27: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x45FA456: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45F9D80: dlopen (in /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x45398F8: (within /usr/lib/libX11.so.6.2.0) ==3722==by 0x4539B42: _XlcDynamicLoad (in /usr/lib/libX11.so.6.2.0) ==3722==by 0x454E108: _XOpenLC (in /usr/lib/libX11.so.6.2.0) ==3722== ==3722== Conditional jump or move depends on uninitialised value(s) ==3722==at 0x40114DA: (within /lib/ld-2.3.6.so) ==3722==by 0x400717A: (within /lib/ld-2.3.6.so) ==3722==by 0x48A14AF: (within /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722==by 0x48A1E6A: _dl_open (in /lib/tls/i686/cmov/libc-2.3.6.so) ==3722==by 0x45F9D27: (within /lib/tls/i686/cmov/libdl-2.3.6.so) ==3722==by 0x400BA5E: (within /lib/ld-2.3.6.so) ==3722
