On 2015-11-09 11:53, Mattias Ellert wrote:
> Package: gcc-5
> Version: 5.2.1-23
> Severity: serious
> Justification: causes gsoap to FTBFS
> Control: affects -1 gsoap
> Control: block 804455 by -1
> X-Debbugs-Cc: debian-mips@lists.debian.org
>
> Hi!
>
> The binnmu of gsoap 2.8.22-1 due to the openssl transition failed on
> mips and mipsel, but succeeded on the other architectures.
>
> https://buildd.debian.org/status/package.php?p=gsoap
>
> (It also succeeded on mip64le - but the mips64el build used gcc-5
> 5.2.1-21 while mips and mipsel used 5.2.1-23. I am not sure if this is
> relevant information.)
>
> The failure is a segmentation fault when running the soapcpp2 binary
> that has been compiled as part of the build. The soapcpp2 binary is not
> linked to openssl, so the issue is not due to the new openssl library
> that triggered the binnmu rebuild.
>
> I can reproduce the failure on the eder.debian.org porterbox.
>
> However, if I on the porterbox reduce the optimization from -O2 to -O1,
> the build succeeds. This therefore looks like a regression in
> mips/mipsel optimization.
The wrongly compiled code is in soapcpp2_yacc.y (generated from
soapcpp2.y) on line 2272 and following:
| case 34:
| #line 436 "soapcpp2_yacc.y" /* yacc.c:1646 */
| { if ((yyvsp[-1].rec).sto & Stypedef)
| { sprintf(errbuf, "invalid typedef qualifier for '%s'", (yyvsp[0].sym)->name);
| semwarn(errbuf);
| }
| printf("%p\n", (yyvsp[0].sym));
| p = enter(sp->table, (yyvsp[0].sym));
| p->info.typ = (yyvsp[-1].rec).typ;
| p->info.sto = (yyvsp[-1].rec).sto;
| p->info.hasval = False;
| p->info.offset = sp->offset;
| if (sp->grow)
| sp->offset += p->info.typ->width;
| else if (p->info.typ->width > sp->offset)
| sp->offset = p->info.typ->width;
| sp->entry = p;
| }
| #line 2290 "soapcpp2_yacc.c" /* yacc.c:1646 */
| break;
The call to enter is translated into the following code:
| $L129:
| .loc 1 436 0
| lw $2,-60($20)
| sw $2,188($sp)
| andi $2,$2,0x10
| bne $2,$0,$L384
| lui $7,%hi($LC36)
|
| lw $6,0($20)
| $LVL335 = .
| $L385:
| .loc 1 440 0
| lw $22,%got(sp)($28)
| lw $25,%call16(enter)($28)
| lw $2,0($22)
| .reloc 1f,R_MIPS_JALR,enter
| 1: jalr $25
| lw $4,0($2)
Register a2 ($6) is loaded with (yyvsp[0].sym) instead of a1 ($5).
I still have to check if it is reproducible with trunk and to find the
optimization option causing the issue. Then we can report the bug
upstream.
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien@aurel32.net http://www.aurel32.net
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