Attachment 9538 Details for Bug 40585 – lightdm.gdb.log

lightdm.gdb.log

lightdm.gdb.log (text/x-log), 16.76 KB, created by Aleksei Nikiforov on 2021-07-27 13:45:13 MSK

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Creator: Aleksei Nikiforov

Created: 2021-07-27 13:45:13 MSK

Size: 16.76 KB

patch

obsolete

>(gdb) break g_variant_new_string
>Breakpoint 1 at 0x7fcfb8989d43: file ../glib/gvariant.c, line 1261.
>(gdb) break greeter_start_session_cb
>Breakpoint 2 at 0x56132be64bb4: file seat.c, line 1184.
>(gdb) c
>Continuing.
>[Thread 0x7fcfb7392640 (LWP 30646) exited]
>[Detaching after fork from child process 30709]
>
>Thread 1 "lightdm" hit Breakpoint 2, greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x0, seat=0x56132d08c4c0) at seat.c:1184
>1184    {
>(gdb) break find_session_config
>Breakpoint 3 at 0x56132be6406a: file seat.c, line 1003.
>(gdb) c
>Continuing.
>
>[Switching to Thread 0x7fcfb8395800 (LWP 30643)]
>
>Thread 1 "lightdm" hit Breakpoint 1, g_variant_new_string (string=0x56132d0b1ca0 "\261`2\301\312\177") at ../glib/gvariant.c:1261
>1261      g_return_val_if_fail (string != NULL, NULL);
>(gdb) bt
>#0  g_variant_new_string (string=0x56132d0b1ca0 "\261`2\301\312\177") at ../glib/gvariant.c:1261
>#1  0x00007fcfb898ec4b in g_variant_valist_new_nnp (str=0x7ffd2493d6f8, ptr=0x56132d0b1ca0) at ../glib/gvariant.c:4796
>#2  0x00007fcfb898f2ab in g_variant_valist_new_leaf (str=0x7ffd2493d6f8, app=0x7ffd2493d740) at ../glib/gvariant.c:4991
>#3  0x00007fcfb898faf1 in g_variant_valist_new (str=0x7ffd2493d6f8, app=0x7ffd2493d740) at ../glib/gvariant.c:5173
>#4  0x00007fcfb898fdc3 in g_variant_valist_new (str=0x7ffd2493d6f8, app=0x7ffd2493d740) at ../glib/gvariant.c:5225
>#5  0x00007fcfb8990233 in g_variant_new_va (format_string=0x56132be8b359 ")", endptr=0x0, app=0x7ffd2493d740) at ../glib/gvariant.c:5401
>#6  0x00007fcfb899017a in g_variant_new (format_string=0x56132be8b357 "(s)") at ../glib/gvariant.c:5336
>#7  0x000056132be811ba in common_user_set_session (user=0x56132d0b38c0, session=0x56132d0b1ca0 "\261`2\301\312\177") at user-list.c:1407
>#8  0x000056132be50bbe in user_set_xsession (user=0x7fcfac00c300, xsession=0x56132d0b1ca0 "\261`2\301\312\177") at accounts.c:113
>#9  0x000056132be64dc7 in greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x56132d0b1ca0 "\261`2\301\312\177", seat=0x56132d08c4c0) at seat.c:1232
>#10 0x00007fcfb8469bad in ffi_call_unix64 () at ../src/x86/unix64.S:101
>#11 0x00007fcfb846913a in ffi_call_int (cif=0x7ffd2493db50, fn=0x56132be64b8b <greeter_start_session_cb>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:669
>#12 0x00007fcfb8a47592 in g_cclosure_marshal_generic (closure=0x56132d09d920, return_gvalue=0x7ffd2493dd50, n_param_values=3, param_values=0x7ffd2493dd80, invocation_hint=0x7ffd2493dd30, marshal_data=0x0) at ../gobject/gclosure.c:1510
>#13 0x00007fcfb8a45b1a in g_closure_invoke (closure=0x56132d09d920, return_value=0x7ffd2493dd50, n_param_values=3, param_values=0x7ffd2493dd80, invocation_hint=0x7ffd2493dd30) at ../gobject/gclosure.c:810
>#14 0x00007fcfb8a64d94 in signal_emit_unlocked_R (node=0x56132d0a4650, detail=0, instance=0x56132d092460, emission_return=0x7ffd2493df80, instance_and_params=0x7ffd2493dd80) at ../gobject/gsignal.c:3741
>#15 0x00007fcfb8a64082 in g_signal_emit_valist (instance=0x56132d092460, signal_id=36, detail=0, var_args=0x7ffd2493e010) at ../gobject/gsignal.c:3507
>#16 0x00007fcfb8a64595 in g_signal_emit (instance=0x56132d092460, signal_id=36, detail=0) at ../gobject/gsignal.c:3553
>#17 0x000056132be56c6f in handle_start_session (greeter=0x56132d092460, session=0x0) at greeter.c:745
>#18 0x000056132be57a43 in read_cb (source=0x56132d08dba0, condition=G_IO_IN, data=0x56132d092460) at greeter.c:1032
>#19 0x000056132be576ed in read_cb (source=0x56132d08dba0, condition=G_IO_IN, data=0x56132d092460) at greeter.c:964
>#20 0x00007fcfb89a1e86 in g_io_unix_dispatch (source=0x56132d0bbc60, callback=0x56132be5747a <read_cb>, user_data=0x56132d092460) at ../glib/giounix.c:166
>#21 0x00007fcfb893a50d in g_main_dispatch (context=0x56132d07af30) at ../glib/gmain.c:3337
>#22 0x00007fcfb893b504 in g_main_context_dispatch (context=0x56132d07af30) at ../glib/gmain.c:4055
>#23 0x00007fcfb893b6ff in g_main_context_iterate (context=0x56132d07af30, block=1, dispatch=1, self=0x7fcfa8003410) at ../glib/gmain.c:4131
>#24 0x00007fcfb893bbc0 in g_main_loop_run (loop=0x56132d076890) at ../glib/gmain.c:4329
>#25 0x000056132be5cf70 in main (argc=1, argv=0x7ffd2493ed58) at lightdm.c:915
>(gdb) info break
>Num     Type           Disp Enb Address            What
>1       breakpoint     keep y   0x00007fcfb8989d43 in g_variant_new_string at ../glib/gvariant.c:1261
>        breakpoint already hit 1 time
>2       breakpoint     keep y   0x000056132be64bb4 in greeter_start_session_cb at seat.c:1184
>        breakpoint already hit 1 time
>3       breakpoint     keep y   0x000056132be6406a in find_session_config at seat.c:1003
>(gdb) disable 1
>(gdb) disable 3
>(gdb) c
>Continuing.
>
>[Detaching after fork from child process 30771]
>[Switching to Thread 0x7fcfb8395800 (LWP 30643)]
>
>Thread 1 "lightdm" hit Breakpoint 2, greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x0, seat=0x56132d08c4c0) at seat.c:1184
>1184    {
>(gdb) print session_name
>$1 = (const gchar *) 0x0
>(gdb) print &session_name
>$2 = (const gchar **) 0x7ffd2493d898
>(gdb) print *((const gchar **) 0x7ffd2493d898)
>$3 = (const gchar *) 0x0
>(gdb) watch *((const gchar **) 0x7ffd2493d898)      
>Hardware watchpoint 4: *((const gchar **) 0x7ffd2493d898)
>(gdb) finish
>Run till exit from #0  greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x0, seat=0x56132d08c4c0) at seat.c:1184
>
>Thread 1 "lightdm" hit Hardware watchpoint 4: *((const gchar **) 0x7ffd2493d898)
>
>Old value = (const gchar *) 0x0
>New value = (const gchar *) 0x56132d090940 "Session"
>greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x56132d090940 "Session", seat=0x56132d08c4c0) at seat.c:1226
>1226                language = user_get_language (user);
>(gdb) bt
>#0  greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x56132d090940 "Session", seat=0x56132d08c4c0) at seat.c:1226
>#1  0x00007fcfb8469bad in ffi_call_unix64 () at ../src/x86/unix64.S:101
>#2  0x00007fcfb846913a in ffi_call_int (cif=0x7ffd2493db50, fn=0x56132be64b8b <greeter_start_session_cb>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:669
>#3  0x00007fcfb8a47592 in g_cclosure_marshal_generic (closure=0x56132d09d920, return_gvalue=0x7ffd2493dd50, n_param_values=3, param_values=0x7ffd2493dd80, invocation_hint=0x7ffd2493dd30, marshal_data=0x0) at ../gobject/gclosure.c:1510
>#4  0x00007fcfb8a45b1a in g_closure_invoke (closure=0x56132d09d920, return_value=0x7ffd2493dd50, n_param_values=3, param_values=0x7ffd2493dd80, invocation_hint=0x7ffd2493dd30) at ../gobject/gclosure.c:810
>#5  0x00007fcfb8a64d94 in signal_emit_unlocked_R (node=0x56132d0a4650, detail=0, instance=0x56132d092460, emission_return=0x7ffd2493df80, instance_and_params=0x7ffd2493dd80) at ../gobject/gsignal.c:3741
>#6  0x00007fcfb8a64082 in g_signal_emit_valist (instance=0x56132d092460, signal_id=36, detail=0, var_args=0x7ffd2493e010) at ../gobject/gsignal.c:3507
>#7  0x00007fcfb8a64595 in g_signal_emit (instance=0x56132d092460, signal_id=36, detail=0) at ../gobject/gsignal.c:3553
>#8  0x000056132be56c6f in handle_start_session (greeter=0x56132d092460, session=0x0) at greeter.c:745
>#9  0x000056132be57a43 in read_cb (source=0x56132d08dba0, condition=G_IO_IN, data=0x56132d092460) at greeter.c:1032
>#10 0x000056132be576ed in read_cb (source=0x56132d08dba0, condition=G_IO_IN, data=0x56132d092460) at greeter.c:964
>#11 0x00007fcfb89a1e86 in g_io_unix_dispatch (source=0x56132d0bbc60, callback=0x56132be5747a <read_cb>, user_data=0x56132d092460) at ../glib/giounix.c:166
>#12 0x00007fcfb893a50d in g_main_dispatch (context=0x56132d07af30) at ../glib/gmain.c:3337
>#13 0x00007fcfb893b504 in g_main_context_dispatch (context=0x56132d07af30) at ../glib/gmain.c:4055
>#14 0x00007fcfb893b6ff in g_main_context_iterate (context=0x56132d07af30, block=1, dispatch=1, self=0x7fcfa8003410) at ../glib/gmain.c:4131
>#15 0x00007fcfb893bbc0 in g_main_loop_run (loop=0x56132d076890) at ../glib/gmain.c:4329
>#16 0x000056132be5cf70 in main (argc=1, argv=0x7ffd2493ed58) at lightdm.c:915
>(gdb) l
>1221                if (!session_name && g_strcmp0 (user_get_name (user), autologin_username) == 0)
>1222                    session_name = seat_get_string_property (seat, "autologin-session");
>1223
>1224                if (!session_name)
>1225                    session_name = user_get_xsession (user);
>1226                language = user_get_language (user);
>1227            }
>1228
>1229            if (!session_name)
>1230                session_name = seat_get_string_property (seat, "user-session");
>(gdb) c
>Continuing.
>
>[Switching to Thread 0x7fcfb8395800 (LWP 30643)]
>
>Thread 1 "lightdm" hit Breakpoint 5, greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x56132d090940 "@*:L\026V", seat=0x56132d08c4c0) at seat.c:1229
>1229            if (!session_name)
>(gdb) l
>1224                if (!session_name)
>1225                    session_name = user_get_xsession (user);
>1226                language = user_get_language (user);
>1227            }
>1228
>1229            if (!session_name)
>1230                session_name = seat_get_string_property (seat, "user-session");
>1231            if (user)
>1232                user_set_xsession (session_get_user (session), session_name);
>1233
>(gdb) print session_name
>$4 = (const gchar *) 0x56132d090940 "@*:L\026V"
>(gdb) l
>1234            g_autoptr(SessionConfig) session_config = find_session_config (seat, sessions_dir, session_name);
>1235            if (!session_config)
>1236            {
>1237                l_debug (seat, "Can't find session '%s'", session_name);
>1238                return FALSE;
>1239            }
>1240
>1241            configure_session (session, session_config, session_name, language);
>1242            g_auto(GStrv) argv = get_session_argv (seat, session_config, get_session_wrapper (seat, session, "session-wrapper", "wayland-session-wrapper"));
>1243            session_set_argv (session, argv);
>(gdb) info break
>Num     Type           Disp Enb Address            What
>1       breakpoint     keep n   0x00007fcfb8989d43 in g_variant_new_string at ../glib/gvariant.c:1261
>        breakpoint already hit 1 time
>2       breakpoint     keep y   0x000056132be64bb4 in greeter_start_session_cb at seat.c:1184
>        breakpoint already hit 3 times
>3       breakpoint     keep n   0x000056132be6406a in find_session_config at seat.c:1003
>4       hw watchpoint  keep y                      *((const gchar **) 0x7ffd2493d898)
>        breakpoint already hit 1 time
>5       breakpoint     keep y   0x000056132be64d78 in greeter_start_session_cb at seat.c:1229
>        breakpoint already hit 1 time
>(gdb) delete 4
>(gdb) c
>Continuing.
>
>[Detaching after fork from child process 30794]
>[Switching to Thread 0x7fcfb8395800 (LWP 30643)]
>
>Thread 1 "lightdm" hit Breakpoint 2, greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x0, seat=0x56132d08c4c0) at seat.c:1184
>1184    {
>(gdb) print &session_name
>$5 = (const gchar **) 0x7ffd2493d898
>(gdb) print session_name 
>$6 = (const gchar *) 0x0
>(gdb) print *((const gchar **) 0x7ffd2493d898)
>$7 = (const gchar *) 0x0
>(gdb) watch *((const gchar **) 0x7ffd2493d898)     
>Hardware watchpoint 6: *((const gchar **) 0x7ffd2493d898)
>(gdb) n
>1185        SeatPrivate *priv = seat_get_instance_private (seat);
>(gdb) n
>1189        if (greeter_get_guest_authenticated (greeter))
>(gdb) n
>1198            session = greeter_take_authentication_session (greeter);
>(gdb) n
>1201            g_autofree gchar *sessions_dir = NULL;
>(gdb) n
>1202            switch (type)
>(gdb) n
>1205                sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
>(gdb) n
>1206                break;
>(gdb) n
>1213            const gchar *language = NULL;
>(gdb) n
>1214            User *user = session_get_user (session);
>(gdb) n
>1215            if (user)
>(gdb) n
>1220                autologin_username = seat_get_string_property (seat, "autologin-user");
>(gdb) n
>1221                if (!session_name && g_strcmp0 (user_get_name (user), autologin_username) == 0)
>(gdb) n
>1224                if (!session_name)
>(gdb) n
>1225                    session_name = user_get_xsession (user);
>(gdb) n
>
>Thread 1 "lightdm" hit Hardware watchpoint 6: *((const gchar **) 0x7ffd2493d898)
>
>Old value = (const gchar *) 0x0
>New value = (const gchar *) 0x56132d08fcd0 "Session"
>greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x56132d08fcd0 "Session", seat=0x56132d08c4c0) at seat.c:1226
>1226                language = user_get_language (user);
>(gdb) l
>1221                if (!session_name && g_strcmp0 (user_get_name (user), autologin_username) == 0)
>1222                    session_name = seat_get_string_property (seat, "autologin-session");
>1223
>1224                if (!session_name)
>1225                    session_name = user_get_xsession (user);
>1226                language = user_get_language (user);
>1227            }
>1228
>1229            if (!session_name)
>1230                session_name = seat_get_string_property (seat, "user-session");
>(gdb) print (const gchar *) 0x56132d08fcd0
>$8 = (const gchar *) 0x56132d08fcd0 "Session"
>(gdb) print *((const gchar *) 0x56132d08fcd0)
>$9 = 83 'S'
>(gdb) watch *((const gchar *) 0x56132d08fcd0)     
>Hardware watchpoint 7: *((const gchar *) 0x56132d08fcd0)
>(gdb) c
>Continuing.
>
>[Switching to Thread 0x7fcfb8395800 (LWP 30643)]
>
>Thread 1 "lightdm" hit Hardware watchpoint 7: *((const gchar *) 0x56132d08fcd0)
>
>Old value = 83 'S'
>New value = 15 '\017'
>tcache_put (tc_idx=0, chunk=0x56132d08fcc0) at malloc.c:2942
>2942      tcache->entries[tc_idx] = e;
>(gdb) bt
>#0  tcache_put (tc_idx=0, chunk=0x56132d08fcc0) at malloc.c:2942
>#1  _int_free (av=0x7fcfb86faa00 <main_arena>, p=0x56132d08fcc0, have_lock=0) at malloc.c:4240
>#2  0x00007fcfb8943735 in g_free (mem=0x56132d08fcd0) at ../glib/gmem.c:199
>#3  0x000056132be80774 in load_dmrc (user=0x56132d0b38c0) at user-list.c:1193
>#4  0x000056132be80d5f in common_user_get_language (user=0x56132d0b38c0) at user-list.c:1322
>#5  0x000056132be50b65 in user_get_language (user=0x7fcfa0008c40) at accounts.c:105
>#6  0x000056132be64d74 in greeter_start_session_cb (greeter=0x56132d092460, type=SESSION_TYPE_LOCAL, session_name=0x56132d08fcd0 "\017w:L\026V", seat=0x56132d08c4c0) at seat.c:1226
>#7  0x00007fcfb8469bad in ffi_call_unix64 () at ../src/x86/unix64.S:101
>#8  0x00007fcfb846913a in ffi_call_int (cif=0x7ffd2493db50, fn=0x56132be64b8b <greeter_start_session_cb>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:669
>#9  0x00007fcfb8a47592 in g_cclosure_marshal_generic (closure=0x56132d09d920, return_gvalue=0x7ffd2493dd50, n_param_values=3, param_values=0x7ffd2493dd80, invocation_hint=0x7ffd2493dd30, marshal_data=0x0) at ../gobject/gclosure.c:1510
>#10 0x00007fcfb8a45b1a in g_closure_invoke (closure=0x56132d09d920, return_value=0x7ffd2493dd50, n_param_values=3, param_values=0x7ffd2493dd80, invocation_hint=0x7ffd2493dd30) at ../gobject/gclosure.c:810
>#11 0x00007fcfb8a64d94 in signal_emit_unlocked_R (node=0x56132d0a4650, detail=0, instance=0x56132d092460, emission_return=0x7ffd2493df80, instance_and_params=0x7ffd2493dd80) at ../gobject/gsignal.c:3741
>#12 0x00007fcfb8a64082 in g_signal_emit_valist (instance=0x56132d092460, signal_id=36, detail=0, var_args=0x7ffd2493e010) at ../gobject/gsignal.c:3507
>#13 0x00007fcfb8a64595 in g_signal_emit (instance=0x56132d092460, signal_id=36, detail=0) at ../gobject/gsignal.c:3553
>#14 0x000056132be56c6f in handle_start_session (greeter=0x56132d092460, session=0x0) at greeter.c:745
>#15 0x000056132be57a43 in read_cb (source=0x56132d08dba0, condition=G_IO_IN, data=0x56132d092460) at greeter.c:1032
>#16 0x000056132be576ed in read_cb (source=0x56132d08dba0, condition=G_IO_IN, data=0x56132d092460) at greeter.c:964
>#17 0x00007fcfb89a1e86 in g_io_unix_dispatch (source=0x56132d0bbc60, callback=0x56132be5747a <read_cb>, user_data=0x56132d092460) at ../glib/giounix.c:166
>#18 0x00007fcfb893a50d in g_main_dispatch (context=0x56132d07af30) at ../glib/gmain.c:3337
>#19 0x00007fcfb893b504 in g_main_context_dispatch (context=0x56132d07af30) at ../glib/gmain.c:4055
>#20 0x00007fcfb893b6ff in g_main_context_iterate (context=0x56132d07af30, block=1, dispatch=1, self=0x7fcfa8003410) at ../glib/gmain.c:4131
>#21 0x00007fcfb893bbc0 in g_main_loop_run (loop=0x56132d076890) at ../glib/gmain.c:4329
>#22 0x000056132be5cf70 in main (argc=1, argv=0x7ffd2493ed58) at lightdm.c:915
>(gdb) l user-list.c:1322
>1317    {
>1318        g_return_val_if_fail (COMMON_IS_USER (user), NULL);
>1319        // Quick fix: always re-read .dmrc in order to get the
>1320        // up to date locale settings (ALTBUG #30329).
>1321        GET_USER_PRIVATE (user)->loaded_dmrc = FALSE;
>1322        load_dmrc (user);
>1323        const gchar *language = GET_USER_PRIVATE (user)->language;
>1324        return (language && language[0] == 0) ? NULL : language; /* Treat "" as NULL */
>1325    }
>1326
>(gdb)

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Attachments on bug 40585: 9538