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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug modula2/109125] [13 regression] SIGBUS in m2pim_ldtoa_ldtoa
Date: Wed, 15 Mar 2023 14:00:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109125

--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot U=
ni-Bielefeld.DE> ---
> --- Comment #5 from Gaius Mulley <gaius at gcc dot gnu.org> ---
> readreal.mod requires the input file testnumber to be in the same directo=
ry as
> the executable invocation.
>
> Or manually create a text file containing:
>
> cat << EOF > testnumber
> 12.3456
> EOF

Got it, thanks.  It's another unaligned access:

Thread 2 received signal SIGBUS, Bus error.
[Switching to Thread 1 (LWP 1)]
0x00037a40 in m2pim_dtoa_strtod (s=3D0x54c90 "12.3456", error=3D0xffbfe96f)
    at /vol/gcc/src/hg/master/local/libgm2/libm2pim/dtoa.cc:124
124         *error =3D (errno !=3D 0);
1: x/i $pc
=3D> 0x37a40 <m2pim_dtoa_strtod(char const*, int*)+76>:   st  %g2, [ %i1 ]
(gdb) bt
#0  0x00037a40 in m2pim_dtoa_strtod (s=3D0x54c90 "12.3456", error=3D0xffbfe=
96f)
    at /vol/gcc/src/hg/master/local/libgm2/libm2pim/dtoa.cc:124
#1  0x000263b0 in m2iso_RealIO_ReadReal (cid=3D0x594a0, real=3D@0x4e3a8: 0)
    at
/vol/gcc/src/hg/master/local/libgm2/libm2iso/../../gcc/m2/gm2-libs-iso/Real=
IO.mod:75
#2  0x00021cac in _M2_readreal_init (argc=3D1, argv=3D0xffbfebcc, envp=3D0x=
ffbfebd4)
    at
/vol/gcc/src/hg/master/local/gcc/testsuite/gm2/isolib/run/pass/readreal.mod=
:31
#3  0x0002d560 in m2pim_M2Dependent_ConstructModules (
    applicationmodule=3D<optimized out>, libname=3D<optimized out>, argc=3D=
1,=20
    argv=3D0xffbfebcc, envp=3D0xffbfebd4)
    at
/vol/gcc/src/hg/master/local/libgm2/libm2pim/../../gcc/m2/gm2-libs/M2Depend=
ent.mod:813
#4  0x00022660 in _M2_init (argc=3D1, argv=3D0xffbfebcc, envp=3D0xffbfebd4)
    at
/vol/gcc/src/hg/master/local/gcc/testsuite/gm2/isolib/run/pass/readreal.mod=
:18
#5  0x000226d8 in main (argc=3D1, argv=3D0xffbfebcc, envp=3D0xffbfebd4)
    at
/vol/gcc/src/hg/master/local/gcc/testsuite/gm2/isolib/run/pass/readreal.mod=
:18
(gdb) p/x $i1
$1 =3D 0xffbfe96f=