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* [Bug target/50499] New: segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64
@ 2011-09-23 22:08 vries at gcc dot gnu.org
2011-09-23 22:11 ` [Bug target/50499] " vries at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2011-09-23 22:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50499
Bug #: 50499
Summary: segmentation fault in gcc.dg/compat/struct-by-value-1
c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: vries@gcc.gnu.org
The relevant C code from the testcase is this:
...
struct S50 {
unsigned char i[50];
}
void init50 (struct S50 *p, int i) {
int j;
for (j = 0; j < 50; j++)
p->i[j] = i + j;
}
void check50 (struct S50 x, int i) {
int j;
for (j = 0; j < 50; j++)
if (x.i[j] != i + j)
abort ();
}
struct S50 g1s50, g2s50, g3s50;
void checkg50 (void) {
check50 (g1s50, 64);
check50 (g2s50, 128);
check50 (g3s50, 192);
}
void testit50 (void) {
init50 (&g1s50, 64);
init50 (&g2s50, 128);
init50 (&g3s50, 192);
checkg50 ();
test50 (g1s50, g2s50, g3s50);
test2_50 (g1s50, g3s50);
}
...
In checkg50, the code for the second call to check50 looks like this:
...
addis 9,2,.LC152@toc@ha
mr 0,9
mr 11,0
ld 0,.LC152@toc@l(11)
mr 9,0
ld 3,0(9)
mr 11,0
ld 4,8(11)
mr 9,0
ld 5,16(9)
mr 11,0
ld 6,24(11)
mr 9,0
ld 7,32(9)
mr 11,0
ld 8,40(11)
mr 11,0
ld 9,48(11)
li 10,192
bl check50
...
I ran into a segmentation fault while executing 'ld 9,48(11)', the last load.
The LC152 data referenced is declared here:
...
.LC150:
.tc g1s50[TC],g1s50
.LC151:
.tc g2s50[TC],g2s50
.LC152:
.tc g3s50[TC],g3s50
.section ".text"
...
and defined here:
...
.comm g1s50,50,1
.comm g2s50,50,1
.comm g3s50,50,1
...
So g2s50 is only 50 chars big, but we try to read 52 chars from it. We happen
not to have access to the 2 extra chars, and this causes the segmentation
violation.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/50499] segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64
2011-09-23 22:08 [Bug target/50499] New: segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64 vries at gcc dot gnu.org
@ 2011-09-23 22:11 ` vries at gcc dot gnu.org
2011-09-23 22:14 ` vries at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2011-09-23 22:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50499
--- Comment #1 from vries at gcc dot gnu.org 2011-09-23 22:08:12 UTC ---
Created attachment 25352
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25352
preprocessed struct-by-value-1_y.c
to reproduce:
$ powerpc-linux-gnu-gcc -c-m64 struct-by-value-1_y.c -save-temps
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/50499] segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64
2011-09-23 22:08 [Bug target/50499] New: segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64 vries at gcc dot gnu.org
2011-09-23 22:11 ` [Bug target/50499] " vries at gcc dot gnu.org
@ 2011-09-23 22:14 ` vries at gcc dot gnu.org
2012-02-02 15:07 ` bergner at gcc dot gnu.org
2012-02-02 15:09 ` bergner at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2011-09-23 22:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50499
--- Comment #2 from vries at gcc dot gnu.org 2011-09-23 22:10:51 UTC ---
gcc -v configure line:
...
Configured with:
/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/src/gcc-mainline/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=powerpc-linux-gnu
--enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch
--enable-checking=yes,rtl --with-long-double-128 --enable-targets=all
--with-gnu-as --with-gnu-ld --enable-languages=c,c++ --enable-shared
--enable-lto --enable-symvers=gnu --enable-__cxa_atexit --disable-nls
--prefix=/opt/codesourcery
--with-sysroot=/opt/codesourcery/powerpc-linux-gnu/libc
--with-build-sysroot=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/install/powerpc-linux-gnu/libc
--with-gmp=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/obj/host-libs-mainline-0-powerpc-linux-gnu-i686-pc-linux-gnu/usr
--with-mpfr=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/obj/host-libs-mainline-0-powerpc-linux-gnu-i686-pc-linux-gnu/usr
--with-mpc=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/obj/host-libs-mainline-0-powerpc-linux-gnu-i686-pc-linux-gnu/usr
--with-ppl=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/obj/host-libs-mainline-0-powerpc-linux-gnu-i686-pc-linux-gnu/usr
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm'
--with-cloog=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/obj/host-libs-mainline-0-powerpc-linux-gnu-i686-pc-linux-gnu/usr
--with-libelf=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/obj/host-libs-mainline-0-powerpc-linux-gnu-i686-pc-linux-gnu/usr
--disable-libgomp --enable-poison-system-directories
--with-build-time-tools=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/install/powerpc-linux-gnu/bin
--with-build-time-tools=/scratch/vries/b6/pr43864.42.all-fsf-mainline-powerpc-linux-gnu.cfg/install/powerpc-linux-gnu/bin
...
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/50499] segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64
2011-09-23 22:08 [Bug target/50499] New: segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64 vries at gcc dot gnu.org
2011-09-23 22:11 ` [Bug target/50499] " vries at gcc dot gnu.org
2011-09-23 22:14 ` vries at gcc dot gnu.org
@ 2012-02-02 15:07 ` bergner at gcc dot gnu.org
2012-02-02 15:09 ` bergner at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: bergner at gcc dot gnu.org @ 2012-02-02 15:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50499
Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> 2012-02-02 15:07:34 UTC ---
This is a duplicate of PR36043.
*** This bug has been marked as a duplicate of bug 36043 ***
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/50499] segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64
2011-09-23 22:08 [Bug target/50499] New: segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64 vries at gcc dot gnu.org
` (2 preceding siblings ...)
2012-02-02 15:07 ` bergner at gcc dot gnu.org
@ 2012-02-02 15:09 ` bergner at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: bergner at gcc dot gnu.org @ 2012-02-02 15:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50499
Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #4 from Peter Bergner <bergner at gcc dot gnu.org> 2012-02-02 15:08:50 UTC ---
Closing as duplicate.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2012-02-02 15:09 UTC | newest]
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2011-09-23 22:08 [Bug target/50499] New: segmentation fault in gcc.dg/compat/struct-by-value-1 c_compat_x_tst.o-c_compat_y_tst.o with ppc -m64 vries at gcc dot gnu.org
2011-09-23 22:11 ` [Bug target/50499] " vries at gcc dot gnu.org
2011-09-23 22:14 ` vries at gcc dot gnu.org
2012-02-02 15:07 ` bergner at gcc dot gnu.org
2012-02-02 15:09 ` bergner at gcc dot gnu.org
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