On Sat, Nov 02, 2024 at 08:31:30PM -0500, Gary Mills wrote: > <root@intel># mdb /mnt/core > Loading modules: [ libc.so.1 ld.so.1 ] > > ::status > debugging core file of lightdm (64-bit) from intel > initial argv: /usr/sbin/lightdm > threading model: native threads > status: process terminated by SIGSEGV (Segmentation Fault), addr=c8 > > ::stack > display_server_stopped_cb+0x2a9() > libgobject-2.0.so.0.8200.2`_g_closure_invoke_va+0xd0() > libgobject-2.0.so.0.8200.2`signal_emit_valist_unlocked+0x1173() > libgobject-2.0.so.0.8200.2`g_signal_emit_valist+0x3d() > libgobject-2.0.so.0.8200.2`g_signal_emit+0x7d() > libgobject-2.0.so.0.8200.2`g_closure_invoke+0xc5() > libgobject-2.0.so.0.8200.2`signal_emit_unlocked_R.isra.0+0xb86() > libgobject-2.0.so.0.8200.2`signal_emit_valist_unlocked+0x10c1() > libgobject-2.0.so.0.8200.2`g_signal_emit_valist+0x3d() > libgobject-2.0.so.0.8200.2`g_signal_emit+0x7d() > libglib-2.0.so.0.8200.2`g_child_watch_dispatch+0x66() > libglib-2.0.so.0.8200.2`g_main_dispatch+0xb6() > libglib-2.0.so.0.8200.2`g_main_context_iterate_unlocked.isra.0+0x2a8() > libglib-2.0.so.0.8200.2`g_main_loop_run+0x117() > main+0xcc7() > _start_crt+0x87() > _start+0x18() > > ^d
The segfault happened here (apparently rax is zero): > display_server_stopped_cb+0x2a9::dis display_server_stopped_cb+0x27b:jne -0x154 <display_server_stopped_cb+0x12d> display_server_stopped_cb+0x281:nopl 0x0(%rax) display_server_stopped_cb+0x288:movq -0x38(%rbp),%rdi display_server_stopped_cb+0x28c:movl $0x41a2e8,%esi <PLT:g_object_unref> display_server_stopped_cb+0x291:call -0x1450e <PLT:g_list_free_full> display_server_stopped_cb+0x296:movl 0x44(%r14),%edx display_server_stopped_cb+0x29a:testl %edx,%edx display_server_stopped_cb+0x29c:jne -0x1dd <display_server_stopped_cb+0xc5> display_server_stopped_cb+0x2a2:movq (%r12),%rax display_server_stopped_cb+0x2a6:movq %r12,%rdi display_server_stopped_cb+0x2a9:call *0xc8(%rax) <------------- HERE display_server_stopped_cb+0x2af:movq %rax,%rdi display_server_stopped_cb+0x2b2:testq %rax,%rax display_server_stopped_cb+0x2b5:je +0xe <display_server_stopped_cb+0x2c5> display_server_stopped_cb+0x2b7:call +0x4724 <session_get_display_server> display_server_stopped_cb+0x2bc:cmpq %rax,%r13 display_server_stopped_cb+0x2bf:jne -0x200 <display_server_stopped_cb+0xc5> display_server_stopped_cb+0x2c5:call -0x83da <logger_get_type> display_server_stopped_cb+0x2ca:movq %r12,%rdi display_server_stopped_cb+0x2cd:movq %rax,%rsi display_server_stopped_cb+0x2d0:call -0x146bd <PLT:g_type_check_instance_cast> > So the next step would be to dig into the lightdm sources. Anyway, our lightdm is 1.30.0 released over 5 years ago. Maybe as a first step it would be better to update to 1.32.0 (released two years ago) and start the debugging from there (if the core persists). -- +-------------------------------------------+ | Marcel Telka e-mail: mar...@telka.sk | | homepage: http://telka.sk/ | +-------------------------------------------+ _______________________________________________ oi-dev mailing list oi-dev@openindiana.org https://openindiana.org/mailman/listinfo/oi-dev
