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renderer/native: Make sure we're not destroying an active EGLSurface

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When making a new surface/context pair current, mesa may want to flush
the old context. Make sure we don't try to flush any freed memory by
unmaking a surface/context pair current before freeing it.

Not doing this results in the following valgrind warnings:

==15986== Invalid read of size 8
==15986==    at 0x69A6D80: dri_flush_front_buffer (gbm_dri.c:92)
==15986==    by 0x1750D458: intel_flush_front (brw_context.c:251)
==15986==    by 0x1750D4BB: intel_glFlush (brw_context.c:296)
==15986==    by 0x1739D8DD: dri2_make_current (egl_dri2.c:1461)
==15986==    by 0x17393A3A: eglMakeCurrent (eglapi.c:869)
==15986==    by 0x54381FB: InternalMakeCurrentVendor (in /home/jonas/Dev/gnome/install/lib/libEGL.so.1.1.0)
==15986==    by 0x5438515: eglMakeCurrent (in /home/jonas/Dev/gnome/install/lib/libEGL.so.1.1.0)
==15986==    by 0x522A782: _cogl_winsys_egl_make_current (cogl-winsys-egl.c:303)
==15986==    by 0x49B64C8: meta_renderer_native_create_view (meta-renderer-native.c:3076)
==15986==    by 0x48D26E7: meta_renderer_create_view (meta-renderer.c:78)
==15986==    by 0x48D277A: meta_renderer_rebuild_views (meta-renderer.c:111)
==15986==    by 0x49BF46E: meta_stage_native_rebuild_views (meta-stage-native.c:142)
==15986==  Address 0x1b076600 is 0 bytes inside a block of size 48 free'd
==15986==    at 0x4839A0C: free (vg_replace_malloc.c:540)
==15986==    by 0x49B59F3: meta_renderer_native_release_onscreen (meta-renderer-native.c:2651)
==15986==    by 0x5211441: _cogl_onscreen_free (cogl-onscreen.c:167)
==15986==    by 0x5210D81: _cogl_object_onscreen_indirect_free (cogl-onscreen.c:51)
==15986==    by 0x51D0066: _cogl_object_default_unref (cogl-object.c:103)
==15986==    by 0x520F989: _cogl_framebuffer_unref (cogl-framebuffer.c:1814)
==15986==    by 0x51D00B1: cogl_object_unref (cogl-object.c:115)
==15986==    by 0x536F3C7: clutter_stage_view_dispose (clutter-stage-view.c:304)
==15986==    by 0x4B7DAF2: g_object_unref (gobject.c:3309)
==15986==    by 0x4A9596C: g_list_foreach (glist.c:1013)
==15986==    by 0x4A9599A: g_list_free_full (glist.c:223)
==15986==    by 0x48D2737: meta_renderer_rebuild_views (meta-renderer.c:100)
==15986==  Block was alloc'd at
==15986==    at 0x483AB1A: calloc (vg_replace_malloc.c:762)
==15986==    by 0x69A76B2: gbm_dri_surface_create (gbm_dri.c:1252)
==15986==    by 0x69A6BFE: gbm_surface_create (gbm.c:600)
==15986==    by 0x49B4E29: meta_renderer_native_create_surface_gbm (meta-renderer-native.c:2221)
==15986==    by 0x49B57DB: meta_onscreen_native_allocate (meta-renderer-native.c:2569)
==15986==    by 0x49B6423: meta_renderer_native_create_view (meta-renderer-native.c:3062)
==15986==    by 0x48D26E7: meta_renderer_create_view (meta-renderer.c:78)
==15986==    by 0x48D277A: meta_renderer_rebuild_views (meta-renderer.c:111)
==15986==    by 0x49BF46E: meta_stage_native_rebuild_views (meta-stage-native.c:142)
==15986==    by 0x49A75B5: meta_backend_native_update_screen_size (meta-backend-native.c:520)
==15986==    by 0x48B01BB: meta_backend_sync_screen_size (meta-backend.c:224)
==15986==    by 0x48B09B7: meta_backend_real_post_init (meta-backend.c:501)

https://gitlab.gnome.org/GNOME/mutter/merge_requests/622
This commit is contained in:
Jonas Ådahl 2019-06-17 18:18:42 +02:00
parent 1efb32d300
commit 56ddaaa380
1 changed files with 13 additions and 0 deletions
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13
src/backends/native/meta-renderer-native.c
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@ -2910,6 +2910,8 @@ meta_renderer_native_release_onscreen (CoglOnscreen *onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *cogl_context = framebuffer->context;
CoglDisplay *cogl_display = cogl_context_get_display (cogl_context);
CoglDisplayEGL *cogl_display_egl = cogl_display->winsys;
CoglRenderer *cogl_renderer = cogl_context->display->renderer;
CoglRendererEGL *cogl_renderer_egl = cogl_renderer->winsys;
CoglOnscreenEGL *onscreen_egl = onscreen->winsys;
@ -2922,6 +2924,17 @@ meta_renderer_native_release_onscreen (CoglOnscreen *onscreen)
onscreen_native = onscreen_egl->platform;
if (onscreen_egl->egl_surface != EGL_NO_SURFACE &&
(cogl_display_egl->current_draw_surface == onscreen_egl->egl_surface ||
cogl_display_egl->current_read_surface == onscreen_egl->egl_surface))
{
if (!_cogl_winsys_egl_make_current (cogl_display,
cogl_display_egl->dummy_surface,
cogl_display_egl->dummy_surface,
cogl_display_egl->egl_context))
g_warning ("Failed to clear current context");
}
g_list_free_full (onscreen_native->pending_page_flip_retries,
(GDestroyNotify) retry_page_flip_data_free);
if (onscreen_native->retry_page_flips_source)