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backends: Improve MetaCrtcMode lifetime management

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The same MetaCrtcMode objects can be reached via the
MetaOutputInfo::modes array & MetaMonitorMode::crtc_modes arrays and via
the MetaGpuPrivate::modes list, so all of them need to hold their own
references.

In turn, those references need to dropped in meta_output_info_unref and
meta_monitor_mode_free. (meta_gpu_finalize is already dropping the
MetaGpuPrivate::modes list references)

Fixes leak:

==4092== 123 (32 direct, 91 indirect) bytes in 1 blocks are definitely lost in loss record 11,396 of 13,056
==4092==    at 0x4F81D57: g_type_create_instance (gtype.c:1929)
==4092==    by 0x4F64ABF: g_object_new_internal.part.0 (gobject.c:2606)
==4092==    by 0x4F676BA: g_object_new_internal (gobject.c:2923)
==4092==    by 0x4F676BA: g_object_new_valist (gobject.c:2945)
==4092==    by 0x4F67A0C: g_object_new (gobject.c:2418)
==4092==    by 0x4AB578B: meta_crtc_mode_virtual_new (meta-crtc-mode-virtual.c:51)
==4092==    by 0x4B081BB: meta_virtual_monitor_native_new (meta-virtual-monitor-native.c:83)
==4092==    by 0x4AC58CC: meta_monitor_manager_native_create_virtual_monitor (meta-monitor-manager-native.c:603)
==4092==    by 0x496803B: meta_monitor_manager_create_virtual_monitor (meta-monitor-manager.c:621)
==4092==    by 0x4A4A204: create_virtual_monitor (meta-screen-cast-virtual-stream-src.c:625)
==4092==    by 0x4A4A39D: ensure_virtual_monitor (meta-screen-cast-virtual-stream-src.c:663)
==4092==    by 0x4A4A461: meta_screen_cast_virtual_stream_src_notify_params_updated (meta-screen-cast-virtual-stream-src.c:684)
==4092==    by 0x4A568C5: on_stream_param_changed (meta-screen-cast-stream-src.c:1565)

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4149>
This commit is contained in:
Michel Dänzer
2024-11-26 10:59:36 +01:00
committed by Marge Bot
parent fbe00573d7
commit 2c56c9a1da
6 changed files with 21 additions and 13 deletions
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2
src/tests/meta-monitor-test-utils.c
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@ -727,7 +727,7 @@ meta_create_monitor_test_setup (MetaBackend *backend,
int mode_index;
mode_index = setup->outputs[i].modes[j];
modes[j] = g_list_nth_data (test_setup->modes, mode_index);
modes[j] = g_object_ref (g_list_nth_data (test_setup->modes, mode_index));
}
n_possible_crtcs = setup->outputs[i].n_possible_crtcs;