Dear Maintainer,
I tried to reproduce inside a minimal Buster i386 qemu VM
and received also an "Illegal instruction" message.
It looks like it tries to execute an AVX instruction that
my CPU should support, but is not enabled inside the VM.
The usage of AVX might originate from the compiler
flag "-march=native".
This might be added in configure.ac, lines 149 or 163.
The solution could be to just add this configure flag:
-CONF_O=--bindir=/usr/games --disable-silent-rules --enable-speech
+CONF_O=--bindir=/usr/games --disable-silent-rules --enable-speech
--enable-generic-architecture
Then these flags get used instead:
-mtune=generic -mfpmath=sse -msse -msse2
Do these also violate the i386 Buster baseline?
Kind regards,
Bernhard
(gdb) bt
#0 0x005eec8f in std::vector<SCP_vector<unsigned int>,
std::allocator<SCP_vector<unsigned int> > >::operator[] (this=<optimized out>,
__n=<optimized out>) at /usr/include/c++/7/bits/stl_vector.h:798
#1 factor_table::resize (this=0xce84d8 <ftables>, size=6) at
io/keycontrol.cpp:159
#2 0x005eed94 in factor_table::factor_table (this=0xce84d8 <ftables>, size=6)
at io/keycontrol.cpp:112
#3 0x00448a8e in __static_initialization_and_destruction_0 (__priority=65535,
__initialize_p=1) at io/keycontrol.cpp:171
#4 _GLOBAL__sub_I__ZN12factor_tableC2Ej () at io/keycontrol.cpp:2912
#5 0x00952f8b in __libc_csu_init ()
#6 0xb761dad3 in __libc_start_main (main=0x43c4f0 <main(int, char**)>, argc=1,
argv=0xbf8b8554, init=0x952f40 <__libc_csu_init>, fini=0x952fa0
<__libc_csu_fini>, rtld_fini=0xb7ef4520 <_dl_fini>, stack_end=0xbf8b854c) at
../csu/libc-start.c:264
#7 0x0046c58b in _start ()
(gdb) display/i $pc
1: x/i $pc
=> 0x5eec8f <factor_table::resize(unsigned int)+591>: vmovd %ebx,%xmm2
# Buster/stable i386 qemu VM 2019-12-07
# enable non-free
apt update
apt dist-upgrade
apt install systemd-coredump xserver-xorg sddm openbox xterm mc fakeroot gdb
freespace2 freespace2-dbgsym libstdc++-7-dev
apt build-dep freespace2
reboot
mkdir /home/benutzer/source/freespace2/orig -p
cd /home/benutzer/source/freespace2/orig
apt source freespace2
cd
export DISPLAY=:0
/usr/games/fs2_open
catchsegv /usr/games/fs2_open
coredumpctl list
coredumpctl gdb [PID]
set width 0
set pagination off
directory /home/benutzer/source/freespace2/orig/freespace2-3.7.4+repack/code
bt
display/i $pc
###########
benutzer@debian:~$ /usr/games/fs2_open
Ungültiger Maschinenbefehl (Speicherabzug geschrieben)
benutzer@debian:~$ catchsegv /usr/games/fs2_open
Illegal instruction (core dumped)
benutzer@debian:~$ /usr/games/fs2_open_DEBUG
Ungültiger Maschinenbefehl (Speicherabzug geschrieben)
benutzer@debian:~$ catchsegv /usr/games/fs2_open_DEBUG
Illegal instruction (core dumped)
###########
dmesg:
[ 219.663592] traps: fs2_open[883] trap invalid opcode ip:684c8f sp:bf9bce50
error:0 in fs2_open_3.7.4[4d0000+51a000]
[ 226.887618] traps: fs2_open[891] trap invalid opcode ip:5d4c8f sp:bfbbbcc0
error:0 in fs2_open_3.7.4[420000+51a000]
[ 473.081117] traps: fs2_open_DEBUG[1059] trap invalid opcode ip:69bc0f
sp:bfaecb20 error:0 in fs2_open_3.7.4_DEBUG[4cb000+571000]
[ 502.160726] traps: fs2_open_DEBUG[1075] trap invalid opcode ip:5f1c0f
sp:bfd2c050 error:0 in fs2_open_3.7.4_DEBUG[421000+571000]
###########
root@debian:~# coredumpctl list
TIME PID UID GID SIG COREFILE EXE
Sat 2019-12-07 13:34:07 CET 883 1000 1000 4 present
/usr/games/fs2_open_3.7.4
Sat 2019-12-07 13:34:15 CET 891 1000 1000 4 present
/usr/games/fs2_open_3.7.4
Sat 2019-12-07 13:38:21 CET 1059 1000 1000 4 present
/usr/games/fs2_open_3.7.4_DEBUG
Sat 2019-12-07 13:38:50 CET 1075 1000 1000 4 present
/usr/games/fs2_open_3.7.4_DEBUG
root@debian:~# coredumpctl gdb 1140
PID: 1140 (fs2_open)
UID: 1000 (benutzer)
GID: 1000 (benutzer)
Signal: 4 (ILL)
Timestamp: Sat 2019-12-07 13:53:45 CET (6min ago)
Command Line: /usr/games/fs2_open
Executable: /usr/games/fs2_open_3.7.4
Control Group: /user.slice/user-1000.slice/session-6.scope
Unit: session-6.scope
Slice: user-1000.slice
Session: 6
Owner UID: 1000 (benutzer)
Boot ID: 7a7eca3571374b3ca58ef7f657194b9c
Machine ID: 45f49504b47f4e5690bc479adf67aa5b
Hostname: debian
Storage:
/var/lib/systemd/coredump/core.fs2_open.1000.7a7eca3571374b3ca58ef7f657194b9c.1140.1575723225000000.lz4
Message: Process 1140 (fs2_open) of user 1000 dumped core.
Stack trace of thread 1140:
#0 0x00000000005eec8f _ZNSt6vectorI10SCP_vectorIjESaIS1_EEixEj
(fs2_open_3.7.4)
#1 0x00000000005eed94 _ZN12factor_tableC2Ej (fs2_open_3.7.4)
#2 0x0000000000448a8e
__static_initialization_and_destruction_0 (fs2_open_3.7.4)
#3 0x0000000000952f8b __libc_csu_init (fs2_open_3.7.4)
#4 0x00000000b761dad3 __libc_start_main (libc.so.6)
#5 0x000000000046c58b _start (fs2_open_3.7.4)
GNU gdb (Debian 8.2.1-2+b3) 8.2.1
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Reading symbols from /usr/games/fs2_open_3.7.4...Reading symbols from
/usr/lib/debug/.build-id/38/ec7cda2987888751f9122a8d38d93c67541538.debug...done.
done.
warning: core file may not match specified executable file.
[New LWP 1140]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/games/fs2_open'.
Program terminated with signal SIGILL, Illegal instruction.
#0 0x005eec8f in std::vector<SCP_vector<unsigned int>,
std::allocator<SCP_vector<unsigned int> > >::operator[] (this=<optimized out>,
__n=<optimized out>) at /usr/include/c++/7/bits/stl_vector.h:798
warning: Source file is more recent than executable.
798 return *(this->_M_impl._M_start + __n);
(gdb) set width 0
(gdb) set pagination off
(gdb) directory
/home/benutzer/source/freespace2/orig/freespace2-3.7.4+repack/code
Source directories searched:
/home/benutzer/source/freespace2/orig/freespace2-3.7.4+repack/code:$cdir:$cwd
(gdb) bt
#0 0x005eec8f in std::vector<SCP_vector<unsigned int>,
std::allocator<SCP_vector<unsigned int> > >::operator[] (this=<optimized out>,
__n=<optimized out>) at /usr/include/c++/7/bits/stl_vector.h:798
#1 factor_table::resize (this=0xce84d8 <ftables>, size=6) at
io/keycontrol.cpp:159
#2 0x005eed94 in factor_table::factor_table (this=0xce84d8 <ftables>, size=6)
at io/keycontrol.cpp:112
#3 0x00448a8e in __static_initialization_and_destruction_0 (__priority=65535,
__initialize_p=1) at io/keycontrol.cpp:171
#4 _GLOBAL__sub_I__ZN12factor_tableC2Ej () at io/keycontrol.cpp:2912
#5 0x00952f8b in __libc_csu_init ()
#6 0xb761dad3 in __libc_start_main (main=0x43c4f0 <main(int, char**)>, argc=1,
argv=0xbf8b8554, init=0x952f40 <__libc_csu_init>, fini=0x952fa0
<__libc_csu_fini>, rtld_fini=0xb7ef4520 <_dl_fini>, stack_end=0xbf8b854c) at
../csu/libc-start.c:264
#7 0x0046c58b in _start ()
(gdb) display/i $pc
1: x/i $pc
=> 0x5eec8f <factor_table::resize(unsigned int)+591>: vmovd %ebx,%xmm2
(gdb) print/x $ebx
$1 = 0x1
(gdb) print $xmm2
$2 = {v4_float = {0, 0, 0, 0}, v2_double = {0, 0}, v16_int8 = {0 <repeats 16
times>}, v8_int16 = {0, 0, 0, 0, 0, 0, 0, 0}, v4_int32 = {0, 0, 0, 0}, v2_int64
= {0, 0}, uint128 = 0}
(gdb) disassemble /r $pc-23,$pc+20
Dump of assembler code from 0x5eec78 to 0x5eeca3:
0x005eec78 <factor_table::resize(unsigned int)+568>: 89 eb mov %ebp,%ebx
0x005eec7a <factor_table::resize(unsigned int)+570>: c7 44 24 18 01 00 00 00
movl $0x1,0x18(%esp)
0x005eec82 <factor_table::resize(unsigned int)+578>: 83 c3 01 add
$0x1,%ebx
0x005eec85 <factor_table::resize(unsigned int)+581>: 0f 84 97 00 00 00
je 0x5eed22 <factor_table::resize(unsigned int)+738>
0x005eec8b <factor_table::resize(unsigned int)+587>: 8d 6c 6d 00 lea
0x0(%ebp,%ebp,2),%ebp
=> 0x005eec8f <factor_table::resize(unsigned int)+591>: c5 f9 6e d3 vmovd
%ebx,%xmm2
0x005eec93 <factor_table::resize(unsigned int)+595>: b9 01 00 00 00 mov
$0x1,%ecx
0x005eec98 <factor_table::resize(unsigned int)+600>: c5 f9 d6 54 24 08
vmovq %xmm2,0x8(%esp)
0x005eec9e <factor_table::resize(unsigned int)+606>: c1 e5 02 shl
$0x2,%ebp
0x005eeca1 <factor_table::resize(unsigned int)+609>: df 6c 24 08 fildll
0x8(%esp)
End of assembler dump.
(gdb) list
793 */
794 reference
795 operator[](size_type __n) _GLIBCXX_NOEXCEPT
796 {
797 __glibcxx_requires_subscript(__n);
798 return *(this->_M_impl._M_start + __n);
799 }
800
801 /**
802 * @brief Subscript access to the data contained in the %vector.
(gdb) up
#1 factor_table::resize (this=0xce84d8 <ftables>, size=6) at
io/keycontrol.cpp:159
159 _lookup[i].push_back(j);
(gdb) list
154 {
155 for (size_t j = 1; j <= i + 1; ++j)
156 {
157 if (isNaturalNumberFactor(j, i + 1))
158 {
159 _lookup[i].push_back(j);
160 }
161 }
162 }
163 }
(gdb)
# https://www.felixcloutier.com/x86/movd:movq
-CONF_O=--bindir=/usr/games --disable-silent-rules --enable-speech
+CONF_O=--bindir=/usr/games --disable-silent-rules --enable-speech
--enable-generic-architecture
