On Tue, 30 Oct 2018 at 14:13, Rainer Orth <r...@cebitec.uni-bielefeld.de> wrote:
>
> Rainer Orth <r...@cebitec.uni-bielefeld.de> writes:
>
> > * On sparc, I didn't get that far, unfortunately: as I mentioned, many
> > compilations die with SIGBUS:
> >
> > libtool: compile: /var/gcc/regression/trunk/11.5-gcc/build/./gcc/gdc
> > -B/var/gcc/regression/trunk/11.5-gcc/build/./gcc/
> > -B/vol/gcc/sparc-sun-solaris2.11/bin/ -B/vol/gcc/sparc-sun-solaris2.11/lib/
> > -isystem /vol/gcc/sparc-sun-solaris2.11/include -isystem
> > /vol/gcc/sparc-sun-solaris2.11/sys-include -fno-checking -fPIC -O2 -g
> > -nostdinc -I /vol/gcc/src/hg/trunk/local/libphobos/libdruntime -I . -c
> > /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/core/thread.d
> > -fversion=Shared -o core/.libs/thread.o
> > d21: internal compiler error: Bus Error
> > 0xbb5507 crash_signal
> > /vol/gcc/src/hg/trunk/local/gcc/toplev.c:325
> > 0x518700 IntegerExp::toInteger()
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/expression.c:2943
> > 0x4d05c3 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5984
> > 0x4d1543 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:6017
> > 0x4d1543 interpret(Statement*, InterState*)
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:6024
> > 0x4d263b interpretFunction
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:906
> > 0x4d263b interpretFunction
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:726
> > 0x4d05c3 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5984
> > 0x4d14df interpret(Expression*, InterState*, CtfeGoal)
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5994
> > 0x4d05c3 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5984
> > 0x4d14df interpret(Expression*, InterState*, CtfeGoal)
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5994
> > 0x5243d7 DeclarationExp::accept(Visitor*)
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/expression.h:661
> > 0x4d05c3 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5984
> > 0x4d1543 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:6017
> > 0x4d1543 interpret(Statement*, InterState*)
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:6024
> > 0x4d263b interpretFunction
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:906
> > 0x4d263b interpretFunction
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:726
> > 0x4d05c3 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5984
> > 0x4d14df interpret(Expression*, InterState*, CtfeGoal)
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5994
> > 0x4d05c3 interpret
> > /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dinterpret.c:5984
> >
> > Will need to dig further here.
>
> It's exactly as I suspected:
>
> $ d21 /vol/gcc/src/hg/trunk/local/libphobos/libdruntime/core/thread.d
> -mcpu=v9 -fversion=Shared -I
> /vol/gcc/src/hg/trunk/local/libphobos/libdruntime -o thread.s
>
Hi Rainer,
Thanks for looking into this.
My first suspect here would be 'struct UnionExp', see d/dmd/expression.h
Upstream dmd use a poor man's alignment, from what I recall to be
compatible with the dmc compiler.
// Ensure that the union is suitably aligned.
real_t for_alignment_only;
What happens if you were to replace that with marking the type as
__attribute__ ((aligned (8))) ?
--
Iain
