x11: cog on VirtualBox Ubuntu 20.04 seg fault core dumped

[laurence-ejraee]

Hi, I'm trying to get cog to run on a Ubuntu VM running 20.04.4 which has graphics llvmpipe and Windowing System X11.

I am seeing this issue with the simple steps: install cog / wpewebkit etc. from Ubuntu with sudo apt install. Run cog with $ cog https://google.com error:

** (cog:1723): WARNING **: 12:02:21.844: Platform setup failed: Could not open Wayland display
** (cog:1723): CRITICAL : 12:02:21.844: WebKitWebViewBackend webkit_web_view_backend_new(wpe_view_backend, GDestroyNotify, gpointer): assertion 'backend' failed
** (cog:1723): ERROR **: 12:02:21.844: Could not instantiate any WPE backend.
Trace/breakpoint trap (core dumped)

So, I run weston to create the display first, and then run cog to get:

$ cog https://google.com
Cog-Message: 12:04:37.124: https://google.com/ Load started.
Cog-Message: 12:04:37.129: https://www.google.com/ Redirected.
Cog-Message: 12:04:37.382: https://www.google.com/ Loading...
Segmentation fault (core dumped)

I have tried building cog with x11 platform with $ COG_MODULEDIR=$PWD/platform ./launcher/cog --platform=x11 https://www.igalia.com and this does launch a window for a moment, but then crashes.
Please, is it possible to run cog on VM running this version of Ubuntu with X11? If so please advise of any settings or setup I need to use etc.
Any info on this is greatly appreciated!

$ glxinfo -B
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Mesa/X.org (0xffffffff)
Device: llvmpipe (LLVM 12.0.0, 256 bits) (0xffffffff)
Version: 21.2.6
Accelerated: no
Video memory: 3912MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 4.5
Max compat profile version: 3.1
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.2
OpenGL vendor string: Mesa/X.org
OpenGL renderer string: llvmpipe (LLVM 12.0.0, 256 bits)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 21.2.6
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL version string: 3.1 Mesa 21.2.6
OpenGL shading language version string: 1.40
OpenGL context flags: (none)
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 21.2.6
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

Weston log:

$ weston
Date: 2023-10-23 BST
[12:03:42.156] weston 8.0.0
https://wayland.freedesktop.org
Bug reports to: https://gitlab.freedesktop.org/wayland/weston/issues/
Build: 8.0.0
[12:03:42.157] Command line: weston
[12:03:42.157] OS: Linux, 5.15.0-87-generic, #97~20.04.1-Ubuntu SMP Thu Oct 5 08:25:28 UTC 2023, x86_64
[12:03:42.157] Starting with no config file.
[12:03:42.157] Output repaint window is 7 ms maximum.
[12:03:42.158] Loading module '/usr/lib/x86_64-linux-gnu/libweston-8/x11-backend.so'
[12:03:42.163] Loading module '/usr/lib/x86_64-linux-gnu/libweston-8/gl-renderer.so'
[12:03:42.165] EGL client extensions: EGL_EXT_device_base
EGL_EXT_device_enumeration EGL_EXT_device_query
EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses
EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_device
EGL_EXT_platform_wayland EGL_KHR_platform_wayland
EGL_EXT_platform_x11 EGL_KHR_platform_x11 EGL_MESA_platform_xcb
EGL_MESA_platform_gbm EGL_KHR_platform_gbm
EGL_MESA_platform_surfaceless
libEGL warning: DRI2: failed to authenticate
[12:03:42.179] EGL version: 1.5
[12:03:42.179] EGL vendor: Mesa Project
[12:03:42.179] EGL client APIs: OpenGL OpenGL_ES
[12:03:42.179] EGL extensions: EGL_EXT_create_context_robustness
EGL_KHR_cl_event2 EGL_KHR_config_attribs
EGL_KHR_context_flush_control EGL_KHR_create_context
EGL_KHR_create_context_no_error EGL_KHR_fence_sync
EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace
EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image
EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image
EGL_KHR_image_base EGL_KHR_no_config_context
EGL_KHR_reusable_sync EGL_KHR_surfaceless_context
EGL_EXT_pixel_format_float EGL_KHR_wait_sync
EGL_MESA_configless_context EGL_MESA_drm_image
EGL_MESA_query_driver
[12:03:42.180] warning: Disabling render GPU timeline and explicit synchronization due to missing EGL_ANDROID_native_fence_sync extension
[12:03:42.180] EGL_KHR_surfaceless_context available
[12:03:42.190] GL version: OpenGL ES 3.2 Mesa 21.2.6
[12:03:42.191] GLSL version: OpenGL ES GLSL ES 3.20
[12:03:42.191] GL vendor: Mesa/X.org
[12:03:42.191] GL renderer: llvmpipe (LLVM 12.0.0, 256 bits)
[12:03:42.191] GL extensions: GL_EXT_blend_minmax GL_EXT_multi_draw_arrays
GL_EXT_texture_compression_s3tc GL_EXT_texture_compression_dxt1
GL_EXT_texture_compression_rgtc GL_EXT_texture_format_BGRA8888
GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24
GL_OES_element_index_uint GL_OES_fbo_render_mipmap
GL_OES_mapbuffer GL_OES_rgb8_rgba8 GL_OES_standard_derivatives
GL_OES_stencil8 GL_OES_texture_3D GL_OES_texture_float
GL_OES_texture_float_linear GL_OES_texture_half_float
GL_OES_texture_half_float_linear GL_OES_texture_npot
GL_OES_vertex_half_float GL_EXT_draw_instanced
GL_EXT_texture_sRGB_decode GL_OES_EGL_image
GL_OES_depth_texture GL_OES_packed_depth_stencil
GL_EXT_texture_type_2_10_10_10_REV GL_NV_conditional_render
GL_OES_get_program_binary GL_APPLE_texture_max_level
GL_EXT_discard_framebuffer GL_EXT_read_format_bgra
GL_EXT_frag_depth GL_NV_fbo_color_attachments
GL_OES_EGL_image_external GL_OES_EGL_sync
GL_OES_vertex_array_object GL_OES_viewport_array
GL_ANGLE_pack_reverse_row_order
GL_ANGLE_texture_compression_dxt3
GL_ANGLE_texture_compression_dxt5
GL_EXT_occlusion_query_boolean GL_EXT_robustness
GL_EXT_texture_rg GL_EXT_unpack_subimage GL_NV_draw_buffers
GL_NV_read_buffer GL_NV_read_depth GL_NV_read_depth_stencil
GL_NV_read_stencil GL_EXT_draw_buffers GL_EXT_map_buffer_range
GL_KHR_debug GL_KHR_robustness
GL_KHR_texture_compression_astc_ldr GL_NV_pixel_buffer_object
GL_OES_depth_texture_cube_map GL_OES_required_internalformat
GL_OES_surfaceless_context GL_EXT_color_buffer_float
GL_EXT_sRGB_write_control GL_EXT_separate_shader_objects
GL_EXT_shader_group_vote GL_EXT_shader_implicit_conversions
GL_EXT_shader_integer_mix GL_EXT_tessellation_point_size
GL_EXT_tessellation_shader GL_ANDROID_extension_pack_es31a
GL_EXT_base_instance GL_EXT_compressed_ETC1_RGB8_sub_texture
GL_EXT_copy_image GL_EXT_draw_buffers_indexed
GL_EXT_draw_elements_base_vertex GL_EXT_gpu_shader5
GL_EXT_polygon_offset_clamp GL_EXT_primitive_bounding_box
GL_EXT_render_snorm GL_EXT_shader_io_blocks
GL_EXT_texture_border_clamp GL_EXT_texture_buffer
GL_EXT_texture_cube_map_array GL_EXT_texture_norm16
GL_EXT_texture_view GL_KHR_blend_equation_advanced
GL_KHR_context_flush_control
GL_KHR_robust_buffer_access_behavior GL_NV_image_formats
GL_OES_copy_image GL_OES_draw_buffers_indexed
GL_OES_draw_elements_base_vertex GL_OES_gpu_shader5
GL_OES_primitive_bounding_box GL_OES_sample_shading
GL_OES_sample_variables GL_OES_shader_io_blocks
GL_OES_shader_multisample_interpolation
GL_OES_tessellation_point_size GL_OES_tessellation_shader
GL_OES_texture_border_clamp GL_OES_texture_buffer
GL_OES_texture_cube_map_array GL_OES_texture_stencil8
GL_OES_texture_storage_multisample_2d_array GL_OES_texture_view
GL_EXT_blend_func_extended GL_EXT_buffer_storage
GL_EXT_float_blend GL_EXT_geometry_point_size
GL_EXT_geometry_shader GL_EXT_texture_filter_minmax
GL_EXT_texture_sRGB_R8 GL_EXT_texture_sRGB_RG8 GL_KHR_no_error
GL_KHR_texture_compression_astc_sliced_3d
GL_OES_EGL_image_external_essl3 GL_OES_geometry_point_size
GL_OES_geometry_shader GL_OES_shader_image_atomic
GL_EXT_clip_cull_distance GL_EXT_disjoint_timer_query
GL_EXT_texture_compression_s3tc_srgb
GL_MESA_shader_integer_functions GL_EXT_clip_control
GL_EXT_color_buffer_half_float GL_EXT_texture_compression_bptc
GL_KHR_parallel_shader_compile GL_EXT_EGL_image_storage
GL_EXT_shader_framebuffer_fetch_non_coherent
GL_EXT_texture_shadow_lod GL_MESA_framebuffer_flip_y
GL_EXT_depth_clamp GL_EXT_texture_query_lod GL_MESA_bgra
[12:03:42.192] GL ES 2 renderer features:
read-back format: BGRA
wl_shm sub-image to texture: yes
EGL Wayland extension: no
[12:03:42.192] Using gl renderer
[12:03:42.208] Registered plugin API 'weston_windowed_output_api_v1' of size 16
[12:03:42.209] Chosen EGL config details: id: 11 rgba: 8 8 8 0 buf: 24 dep: 0 stcl: 0 int: 1-1 type: win|pix|pbf|swap_preserved vis_id: 0x21
[12:03:42.210] x11 output 1024x600, window id 44040197
[12:03:42.210] Output 'screen0' enabled with head(s) screen0
[12:03:42.210] Compositor capabilities:
arbitrary surface rotation: yes
screen capture uses y-flip: yes
presentation clock: CLOCK_MONOTONIC_RAW, id 4
presentation clock resolution: 0.000000001 s
[12:03:42.211] Loading module '/usr/lib/x86_64-linux-gnu/weston/desktop-shell.so'
[12:03:42.218] launching '/usr/lib/x86_64-linux-gnu/weston-keyboard'
[12:03:42.219] launching '/usr/lib/x86_64-linux-gnu/weston-desktop-shell'

[laurence-ejraee]

I've learnt more and managed to fix my issue.
To get cog to work on VirtualBox VM Ubuntu 20.04 I:

• Build libwpe 1.14.0
• Use this to build wpebackend-fdo 1.14.2
• Use these to build cog 0.16.1
• Run $weston
• In weston use cmd: LD_LIBRARY_PATH=(lib dir for fdo and libwpe) COG_MODULEDIR=$PWD/platform ./launcher/cog -P wl https://www.igalia.com

Hope this might help others.