[Buildroot] COG crashes on Pi4 (wpe_webkit)

[Peter Seiderer <ps.report@gmx.net>]

Hello Daniel,

On Sun, 24 May 2020 08:59:53 +0000, "Daniel HiFiBerry" <daniel@hifiberry.com> wrote:

> Hi Peter,
>
> While I didn't test with a minimal configuration, using the
> "--backend=drm-backend.so" doesn't make a difference in my full-blown
> build.
> I'm using this already. I will do some more experiments...

The trick for hifiberry-os should do (untested) the missing

	BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_KMSRO=y

in your configuration (see the 'hidden' hint in package/mesa3d/Config.in
([1])...

Regards,
Peter

[1] https://git.buildroot.net/buildroot/tree/package/mesa3d/Config.in#n265

>
> Best regards,
> Daniel
>
> ------ Originalnachricht ------
> Von: "Peter Seiderer" <ps.report@gmx.net>
> An: "usul27" <daniel@hifiberry.com>
> Cc: buildroot at busybox.net
> Gesendet: 5/23/2020 10:29:48 PM
> Betreff: Re: [Buildroot] COG crashes on Pi4 (wpe_webkit)
>
> >Hello Daniel,
> >
> >On Fri, 22 May 2020 09:17:18 -0500 (CDT), usul27 <daniel@hifiberry.com> wrote:
> >
> >>  Ok, finally got a build with debug symbols:
> >>
> >>  Thread 1 "cog" received signal SIGSEGV, Segmentation fault.
> >>  0x00000000 in ?? ()
> >>  (gdb) backtrace
> >>  #0  0x00000000 in ?? ()
> >>  #1  0xb1799f84 in ffi_call_SYSV () from /lib/libffi.so.7
> >>  #2  0xb17993fc in ffi_call_int () from /lib/libffi.so.7
> >>  #3  0xb1799b1c in ffi_call () from /lib/libffi.so.7
> >>  #4  0xb149b28c in wl_closure_invoke (closure=closure at entry=0xadb03a00,
> >>  flags=flags at entry=2, target=<optimized out>, opcode=3025639260,
> >>  data=<optimized out>, data at entry=0x74c60) at src/connection.c:1014
> >>  #5  0xb1497db0 in wl_client_connection_data (fd=<optimized out>,
> >>  mask=<optimized out>, data=0x74c60) at src/wayland-server.c:429
> >>  #6  0xb1499608 in wl_event_loop_dispatch (loop=0x5bfc8, timeout=<optimized
> >>  out>) at src/event-loop.c:640
> >>  #7  0xb0c59400 in WS::ServerSource::{lambda(_GSource*, int (*)(void*),
> >>  void*)#3}::_FUN(_GSource*, int (*)(void*), void*) () from
> >>  /lib/libWPEBackend-fdo-1.0.so.1
> >>  Backtrace stopped: previous frame identical to this frame (corrupt stack?)
> >>
> >>  Somebody has any idea?
> >
> >Did some test on RPi4 with the following defconfig:
> >
> >BR2_arm=y
> >BR2_cortex_a72=y
> >BR2_ARM_FPU_NEON_VFPV4=y
> >BR2_ENABLE_DEBUG=y
> >BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
> >BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
> >BR2_BINUTILS_VERSION_2_31_X=y
> >BR2_TOOLCHAIN_BUILDROOT_CXX=y
> >BR2_PACKAGE_HOST_GDB=y
> >BR2_GDB_VERSION_8_3=y
> >BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
> >BR2_SYSTEM_DHCP="eth0"
> >BR2_GENERATE_LOCALE="en_US"
> >BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi4/post-build.sh"
> >BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi4/post-image.sh"
> >BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay"
> >BR2_LINUX_KERNEL=y
> >BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
> >BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,4f2a4cc501c428c940549f39d5562e60404ac4f7)/linux-4f2a4cc501c428c940549f39d5562e60404ac4f7.tar.gz"
> >BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
> >BR2_LINUX_KERNEL_DTS_SUPPORT=y
> >BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2711-rpi-4-b"
> >BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
> >BR2_PACKAGE_STRACE=y
> >BR2_PACKAGE_DEJAVU=y
> >BR2_PACKAGE_COG=y
> >BR2_PACKAGE_MESA3D=y
> >BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_KMSRO=y
> >BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_V3D=y
> >BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_VC4=y
> >BR2_PACKAGE_MESA3D_OPENGL_ES=y
> >BR2_PACKAGE_WESTON=y
> >BR2_PACKAGE_WESTON_DRM=y
> >BR2_PACKAGE_WESTON_DEMO_CLIENTS=y
> >BR2_PACKAGE_RPI_FIRMWARE=y
> >BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4=y
> >BR2_PACKAGE_WPEWEBKIT=y
> >BR2_PACKAGE_OPENSSH=y
> >BR2_TARGET_ROOTFS_EXT2=y
> >BR2_TARGET_ROOTFS_EXT2_4=y
> >BR2_TARGET_ROOTFS_EXT2_LABEL=""
> >BR2_TARGET_ROOTFS_EXT2_SIZE="256M"
> ># BR2_TARGET_ROOTFS_TAR is not set
> >BR2_PACKAGE_HOST_DOSFSTOOLS=y
> >BR2_PACKAGE_HOST_GENIMAGE=y
> >BR2_PACKAGE_HOST_MTOOLS=y
> >
> >Running:
> >
> >	$ export XDG_RUNTIME_DIR=/tmp
> >	$ weston --tty 1 &
> >	$ cog --platform=fdo
> >
> >leads to the 'Segmentation fault' as you described...
> >
> >Running:
> >
> >	$ export XDG_RUNTIME_DIR=/tmp
> >	$ weston --tty 1 --backend=drm-backend.so &
> >	$ cog --platform=fdo
> >
> >works...
> >
> >Regards,
> >Peter
> >
> >
> >>
> >>
> >>
> >>
> >>  --
> >>  Sent from: http://buildroot-busybox.2317881.n4.nabble.com/
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