SIGILL caused by libcairo when running gnome-terminal

Thanks for your bug. Could you get a backtrace with "thread apply all bt" from gdb?

(In reply to comment #1)
> Thanks for your bug. Could you get a backtrace with "thread apply all bt" from
gdb?]

Looks like it's the same:

(gdb) exec-file gnome-terminal
(gdb) thread apply all bt
(gdb) run
Starting program: /usr/bin/gnome-terminal
Using host libthread_db library "/lib/tls/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
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[Thread debugging using libthread_db enabled]
[New Thread -1225095488 (LWP 18677)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
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---Type <return> to continue, or q <return> to quit---
(no debugging symbols found)
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(no debugging symbols found)
(no debugging symbols found)
---Type <return> to continue, or q <return> to quit---
(no debugging symbols found)
(no debugging symbols found)
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(no debugging symbols found)...

no, you have to enter than after the crash to get the backtrace of it

(In reply to comment #3)
> no, you have to enter than after the crash to get the backtrace of it

(gdb) thread apply all bt

Thread 2 (Thread -1236739152 (LWP 19944)):
#0 0xb779f231 in __read_nocancel () from /lib/tls/libpthread.so.0
#1 0xb773a2ad in g_timeout_add () from /usr/lib/libglib-2.0.so.0
#2 0xb7754844 in g_static_private_free () from /usr/lib/libglib-2.0.so.0
#3 0xb779a1ee in start_thread () from /lib/tls/libpthread.so.0
#4 0xb76af03e in clone () from /lib/tls/libc.so.6

Thread 1 (Thread -1225021760 (LWP 19930)):
#0 0xb757d254 in _cairo_pixman_have_mmx () from /usr/lib/libcairo.so.2
#1 0xb757d2ee in _cairo_pixman_compose_setup_mmx () from /usr/lib/libcairo.so.2
#2 0xb756be0f in _cairo_pixman_region_intersect () from /usr/lib/libcairo.so.2
#3 0xb75519ea in cairo_image_surface_get_height () from /usr/lib/libcairo.so.2
#4 0xb75566f9 in cairo_surface_set_device_offset () from /usr/lib/libcairo.so.2
#5 0xb75604fb in cairo_ft_scaled_font_lock_face () from /usr/lib/libcairo.so.2
#6 0xb754d55a in cairo_scaled_font_glyph_extents () from /usr/lib/libcairo.so.2
#7 0xb754b5b4 in cairo_status_to_string () from /usr/lib/libcairo.so.2
#8 0xb755e54f in cairo_ft_scaled_font_unlock_face () from /usr/lib/libcairo.so.2
#9 0xb754cdb3 in cairo_scaled_font_destroy () from /usr/lib/libcairo.so.2
#10 0xb754d2fc in cairo_scaled_font_glyph_extents () from /usr/lib/libcairo.so.2
#11 0xb75e3eba in pango_cairo_fc_font_get_type () from
/usr/lib/libpangocairo-1.0.so.0
#12 0xb78fffb5 in pango_font_get_glyph_extents () from /usr/lib/libpango-1.0.so.0
#13 0xb6559cc0 in ?? () from /usr/lib/pango/1.4.0/modules/pango-basic-fc.so
#14 0x0839fc90 in ?? ()
#15 0x000001e3 in ?? ()
#16 0x00000000 in ?? ()
#17 0xbff1470c in ?? ()
#18 0x084e8780 in ?? ()
#19 0x00000000 in ?? ()
#20 0x084e7d88 in ?? ()
#21 0xb7349bca in pango_fc_font_lock_face () from /usr/lib/libpangoft2-1.0.so.0
#22 0xb6559e6c in ?? () from /usr/lib/pango/1.4.0/modules/pango-basic-fc.so
#23 0x00000000 in ?? ()
#24 0x000001e3 in ?? ()
#25 0xb77037ef in in6addr_any () from /lib/tls/libc.so.6
#26 0xb7904bd7 in pango_context_get_base_dir () from /usr/lib/libpango-1.0.so.0
---Type <return> to continue, or q <return> to quit---
#27 0xb7906bc7 in pango_engine_shape_get_type () from /usr/lib/libpango-1.0.so.0
#28 0xb79159d9 in pango_shape () from /usr/lib/libpango-1.0.so.0
#29 0xb790a3c4 in pango_layout_set_width () from /usr/lib/libpango-1.0.so.0
#30 0xb790c6fb in pango_layout_iter_get_char_extents () from
/usr/lib/libpango-1.0.so.0
#31 0xb790cf58 in pango_layout_iter_get_char_extents () from
/usr/lib/libpango-1.0.so.0
#32 0xb790d887 in pango_layout_iter_get_char_extents () from
/usr/lib/libpango-1.0.so.0
#33 0xb7ba8b97 in gtk_label_get_use_underline () from /usr/lib/libgtk-x11-2.0.so.0
#34 0xb77de315 in g_cclosure_marshal_VOID__BOXED () from
/usr/lib/libgobject-2.0.so.0
#35 0xb77d1d75 in g_cclosure_new_swap () from /usr/lib/libgobject-2.0.so.0
#36 0xb77d23a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#37 0xb77e0769 in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
#38 0xb77e2150 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#39 0xb77e54f0 in g_signal_emit_by_n...

I've forwarded the issue upstream: https://bugs.freedesktop.org/show_bug.cgi?id=4414

SIGILL is illegal instruction, caused by using an instruction
not supported by the CPU. What kind of CPU do you have? Can
you post the output of /proc/cpuinfo?

(In reply to comment #6)
> SIGILL is illegal instruction, caused by using an instruction
> not supported by the CPU. What kind of CPU do you have? Can
> you post the output of /proc/cpuinfo?

marek@k5m10marek:~$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 350.882
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 pge mmx syscall 3dnow k6_mtrr
bogomips : 694.27

(In reply to comment #7)
> (In reply to comment #6)
> > SIGILL is illegal instruction, caused by using an instruction
> > not supported by the CPU. What kind of CPU do you have? Can
> > you post the output of /proc/cpuinfo?

I forgot that I had SIGILL when running app using libcairo2
(Mono-System.Windows.Forms)
Mono has bundled libcairo2. This patch made it work: (the same with libpixman)

Index: configure.in
===================================================================
--- configure.in (wersja 49854)
+++ configure.in (kopia robocza)
@@ -476,7 +476,7 @@
 dnl ===========================================================================
 dnl Check for MMX

-MMX_CFLAGS="-mmmx -msse -Winline --param inline-unit-growth=10000 --param
large-function-growth=10000"
+MMX_CFLAGS="-mmmx -Winline --param inline-unit-growth=10000 --param
large-function-growth=10000"

 have_mmx_intrinsics=no
 AC_MSG_CHECKING(For MMX/SSE intrinsics in the compiler)

I think that libcairo is build with -msse even if target CPU doesn't support SSE.

Thanks, that clarifies it. The gcc documentation is rather misleading
on this point. The current documentation states that these options
(-mmmx, -msse) enable use of the compiler built-ins, and not that it
allows gcc to generate MMX/SSE code. I have filed this bug upstream
with gcc and will fix our code.

  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23809

Unfortunately, the fix is not as simple as removing the -msse. We need
to isolate the MMX/SSE code in a separate file from the runtime detection
code if we intend to keep using the compiler intrinsics.

*** Bug 21690 has been marked as a duplicate of this bug. ***

I'm running Breezy Badger Preview and have experienced a similiar bug
(originally bug #21690) when utilising the GTK+ color picker with gnome-terminal
or gnome-background-properties. Here are my CPU specs:

jconte@ubuntu:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 5
model : 4
model name : Pentium MMX
stepping : 3
cpu MHz : 232.673
fdiv_bug : no
hlt_bug : no
f00f_bug : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 mmx
bogomips : 459.77

*** Bug 21611 has been marked as a duplicate of this bug. ***

This upload fixes the issue:

 libcairo (1.0.2-0ubuntu1) breezy; urgency=low
 .
   * New upstream version:
     - Add support for dashing of stroked curves
     - Fix dashing so that each dash is capped on both ends
     - Prevent SIGILL failures (proper use of -mmmx and -msse flags)
       (Ubuntu: #15091)
     - Fix crashes with text display in multi-threaded program
     - Do not use sincos function since it is buggy on some platforms)
     - Fix several bugs in the test suite exposed by amd64 systems
     - Add missing byteswapping on GetImage/PutImage
     - Make the check for rectangular trapezoids simpler and more accurate
     - Add missing channel-order swapping for antialised fonts
     - Fix compilation failure with aggressive inlining (gcc -O3)
     - Fix some warnings from sparse
     - Fix to not crash when compiled with -fomit-frame-pointer
     - Improve performance for vertical gradients