Dear Maintainer,
I just tried to have a look at this
backtrace by the submitter:
Thread 1 (Thread 0x7f81021b1e00 (LWP 3464)):
...
#6 0x7f810411f 730 in <signal handler called> () at libpthread.so.0
#7 0x56302b0c9 97f in ()
#8 0x56302b0c9 c28 in ()
#9 0x7f8104303 dd8 in g_main_context_dispatch () at libglib-2.0.so.0
#10 0x7f8104304 1c8 in () at libglib-2.0.so.0
#11 0x7f8104304 4c2 in g_main_loop_run () at libglib-2.0.so.0
#12 0x56302ad56 cb7 in app_run ()
#13 0x56302ad56 5b5 in main ()
I think that translates to these symbols:
#0 0x555555997 97f in gimp_projection_chunk_render_iteration () at
gimpprojection.c:1416
#1 0x555555997 c28 in gimp_projection_chunk_render_callback () at
gimpprojection.c:857
#2 0x7ffff6eb1 dd8 in g_main_dispatch () at ../../../glib/gmain.c:3182
#3 0x7ffff6eb1 dd8 in g_main_context_dispatch () at
../../../glib/gmain.c:3847
#4 0x7ffff6eb2 1c8 in g_main_context_iterate () at
../../../glib/gmain.c:3920
#5 0x7ffff6eb2 4c2 in g_main_loop_run () at ../../../glib/gmain.c:4116
#6 0x555555624 cb7 in app_run () at app.c:440
#7 0x555555624 5b5 in main () at main.c:524
Unfortuantely at this offset 97f is just a idiv instruction.
Without having the registers values I could
not make a clue out of it.
(gdb) disassemble 0x55555599797f-0x10,0x55555599797f+0x8
Dump of assembler code from 0x55555599796f to 0x555555997987:
0x555555997 96f <gimp_projection_chunk_render_iteration+367>: cmp
%r13d,%eax
0x555555997 972 <gimp_projection_chunk_render_iteration+370>: mov
%eax,%r12d
0x555555997 975 <gimp_projection_chunk_render_iteration+373>: mov
0x4c(%rbx),%eax
0x555555997 978 <gimp_projection_chunk_render_iteration+376>: cmovg
%r13d,%r12d
0x555555997 97c <gimp_projection_chunk_render_iteration+380>: xor
%edi,%edi
0x555555997 97e <gimp_projection_chunk_render_iteration+382>: cltd
=> 0x555555997 97f <gimp_projection_chunk_render_iteration+383>: idiv
%r12d
0x555555997 982 <gimp_projection_chunk_render_iteration+386>:
cvtsi2sd %eax,%xmm0
0x555555997 986 <gimp_projection_chunk_render_iteration+390>: callq
0x555555997500 <gimp_projection_round_chunk_size>
End of assembler dump.
Unfortunately gimp seems to call gdb but does just
retrieve backtraces but not registers.
Maybe in libgimpbase/gimputils.c a line
like following could do that:
gchar *args[9] = { "gdb", "-batch",
+ "-ex", "info reg",
"-ex", "info threads",
"-ex", "thread apply all backtrace full",
Register $r12d might have been 0, in that case
gimp would throw a similar exception.
Also I could not find a matching upstream bug report.
Kind regards,
Bernhard
# Debian Buster amd64 qemu VM
apt update
apt dist-upgrade
apt install systemd-coredump xserver-xorg dbus-x11 lightdm openbox gdb mc gimp
gimp-dbgsym libglib2.0-0-dbgsym
apt build-dep gimp
mkdir /home/benutzer/source/gimp/orig -p
cd /home/benutzer/source/gimp/orig
apt source gimp
cd
export DISPLAY=:0
gdb -q --args gimp
set width 0
set pagination off
run
ctrl+c
generate-core-file ~/gimp.core
gdb -q /usr/bin/gimp --core gimp.core
set width 0
set pagination off
directory /home/benutzer/source/gimp/orig/gimp-2.10.8/app/core
b *0x00005555556245b0
b *0x0000555555624cb2
b *0x00007ffff6eb64bd
b *0x00007ffff6eb61c3
b *0x00007ffff6eb5dd5
b *0x0000555555997c23
b *0x000055555599797f
###########
# From submitter:
Thread 1 (Thread 0x7f81021b1e00 (LWP 3464)):
#0 0x7f810411e 544 in __libc_read (nbytes=256, buf=0x7ffe67e0a850, fd=14) at
../sysdeps/unix/sysv/linux/read.c:26
#1 0x7f810411e 544 in __libc_read (fd=14, buf=0x7ffe67e0a850, nbytes=256) at
../sysdeps/unix/sysv/linux/read.c:24
#2 0x7f8104e17 d34 in gimp_stack_trace_print () at libgimpbase-2.0.so.0
#3 0x56302ad57 4a0 in ()
#4 0x56302ad57 8d8 in ()
#5 0x56302ad58 037 in ()
#6 0x7f810411f 730 in <signal handler called> () at libpthread.so.0
#7 0x56302b0c9 97f in ()
#8 0x56302b0c9 c28 in ()
#9 0x7f8104303 dd8 in g_main_context_dispatch () at libglib-2.0.so.0
#10 0x7f8104304 1c8 in () at libglib-2.0.so.0
#11 0x7f8104304 4c2 in g_main_loop_run () at libglib-2.0.so.0
#12 0x56302ad56 cb7 in app_run ()
#13 0x56302ad56 5b5 in main ()
0x000055555599797f <+383>: idiv %r12d
Breakpoint 7 at 0x55555599797f: file gimpprojection.c, line 1416.
0x0000555555997 c23 <gimp_projection_chunk_render_callback+83>: callq
0x555555997800 <gimp_projection_chunk_render_iteration>
0x0000555555997 c28 <gimp_projection_chunk_render_callback+88>: test
%eax,%eax
Breakpoint 6 at 0x555555997c23: file gimpprojection.c, line 857.
0x00007ffff6eb5 dd5 <+341>: callq *%r15
0x00007ffff6eb5 dd8 <+344>: mov 0x10(%rsp),%rcx
Breakpoint 5 at 0x7ffff6eb5dd5: file ../../../glib/gmain.c, line 3182.
0x00007ffff6eb6 1c3 <+515>: callq 0x7ffff6eb5c80 <g_main_context_dispatch>
0x00007ffff6eb6 1c8 <+520>: jmpq 0x7ffff6eb60ee
<g_main_context_iterate+302>
Breakpoint 4 at 0x7ffff6eb61c3: file ../../../glib/gmain.c, line 3920.
0x00007ffff6eb6 4bd <+173>: callq 0x7ffff6eb5fc0 <g_main_context_iterate>
0x00007ffff6eb6 4c2 <+178>: mov 0x8(%rbx),%eax
Breakpoint 3 at 0x7ffff6eb64bd: file ../../../glib/gmain.c, line 4116.
0x0000555555624 cb2 <+850>: callq 0x5555556207e0 <g_main_loop_run@plt>
0x0000555555624 cb7 <+855>: mov %rbx,%rdi
Breakpoint 2 at 0x555555624cb2: file app.c, line 440.
0x0000555555624 5b0 <+912>: callq 0x555555624960 <app_run>
0x0000555555624 5b5 <+917>: mov 0xa0(%rsp),%rdi
Breakpoint 1 at 0x5555556245b0: file main.c, line 524.
------
0x56302b0c9c28 in ???
- 0x56302ad565b5 in main
= 0x373673 offset
-> 0x00005555556245b5 + 0x373673 = 0x555555997C28 -> disassemble
0x555555997C28-0x20,0x555555997C28+0x20 -->
gimp_projection_chunk_render_callback+88
------
(gdb) list gimpprojection.c:1416
1412
1413 static gint
1414 gimp_projection_round_chunk_width (gdouble width)
1415 {
1416 gint w = gimp_projection_round_chunk_size (width, FALSE);
1417
1418 return CLAMP (w, GIMP_PROJECTION_CHUNK_MIN_WIDTH,
1419 GIMP_PROJECTION_CHUNK_MAX_WIDTH);
1420 }
(gdb) list gimpprojection.c:1379,1412
1379
1380 static gint
1381 gimp_projection_round_chunk_size (gdouble size,
1382 gboolean toward_zero)
1383 {
1384 /* round 'size' (up or down, depending on 'toward_zero') to the
closest power
1385 * of 2
1386 */
1387
1388 if (size < 0.0)
1389 {
1390 return -gimp_projection_round_chunk_size (-size, toward_zero);
1391 }
1392 else if (size == 0.0)
1393 {
1394 return 0;
1395 }
1396 else if (size < 1.0)
1397 {
1398 return toward_zero ? 0 : 1;
1399 }
1400 else
1401 {
1402 gdouble log2_size = log (size) / G_LN2;
1403
1404 if (toward_zero)
1405 log2_size = floor (log2_size);
1406 else
1407 log2_size = ceil (log2_size);
1408
1409 return 1 << (gint) log2_size;
1410 }
1411 }
-------
#0 0x555555997 97f in gimp_projection_chunk_render_iteration () at
gimpprojection.c:1416
#1 0x555555997 c28 in gimp_projection_chunk_render_callback () at
gimpprojection.c:857
#2 0x7ffff6eb1 dd8 in g_main_dispatch () at ../../../glib/gmain.c:3182
#3 0x7ffff6eb1 dd8 in g_main_context_dispatch () at ../../../glib/gmain.c:3847
#4 0x7ffff6eb2 1c8 in g_main_context_iterate () at ../../../glib/gmain.c:3920
#5 0x7ffff6eb2 4c2 in g_main_loop_run () at ../../../glib/gmain.c:4116
#6 0x555555624 cb7 in app_run () at app.c:440
#7 0x555555624 5b5 in main () at main.c:524
(gdb) disassemble 0x55555599797f-0x10,0x55555599797f+0x8
Dump of assembler code from 0x55555599796f to 0x555555997987:
0x000055555599796f <gimp_projection_chunk_render_iteration+367>: cmp
%r13d,%eax
0x0000555555997972 <gimp_projection_chunk_render_iteration+370>: mov
%eax,%r12d
0x0000555555997975 <gimp_projection_chunk_render_iteration+373>: mov
0x4c(%rbx),%eax
0x0000555555997978 <gimp_projection_chunk_render_iteration+376>: cmovg
%r13d,%r12d
0x000055555599797c <gimp_projection_chunk_render_iteration+380>: xor
%edi,%edi
0x000055555599797e <gimp_projection_chunk_render_iteration+382>: cltd
=> 0x000055555599797f <gimp_projection_chunk_render_iteration+383>: idiv
%r12d
0x0000555555997982 <gimp_projection_chunk_render_iteration+386>:
cvtsi2sd %eax,%xmm0
0x0000555555997986 <gimp_projection_chunk_render_iteration+390>: callq
0x555555997500 <gimp_projection_round_chunk_size>
End of assembler dump.
