[Bug c++/13685] New: Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[Bug c++/13685] New: Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

See (lots of confusion...) 
 http://bugs.kde.org/show_bug.cgi?id=70655 
 
I will attach source and assembly.

-- 
           Summary: Building KDE3.2 clock applet with -march=pentium3 -O1
                    gives SIGSEGV
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: roger dot larsson at norran dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug c++/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2004-01-14 18:33 -------
Created an attachment (id=5487)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5487&action=view)
c++ source from kde/kdebase/kicker/applets/clock/

crash at line 536

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-01-14 18:34 -------
I think the problem is that the stack is unaligned causing the problem, I know there is another bug 
for that, if that is the bug, can you just mark it as a dup, I think it is suspended.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2004-01-14 19:51 -------
Created an attachment (id=5489)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5489&action=view)
Assembly output

Crashes at this line when compiled with -march=pentium3 [-mcpu=pentium3] -O1
(There is only one movaps...)

	0x41a8867b AnalogClock::paintEvent   movaps %xmm0,0xfffffc78(%ebp)

where

ebp	       0xbfffea60	0xbfffea60

This will generate a non 16 byte aligned access!!!
=> Crash

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2004-01-14 23:50 -------
Code is not from a lib, it is generated by gcc. 
=> I do not think this is a DUP of bug 10395 
 
I did a little script to search for the problems. 
# /bin/bash 
# Filename: objdump_find_problematic 
 
grep_sse () 
{ 
	grep $1 "\(\(mov\(ap\|up\|ntp\)\|shufp\|unpck\(hp\|lp\)\|\(add\|\mul\|
div\|and\|andn\|or\|xor\|max\|min\|cmp\.\.\|sqrt\|rsqrt\|rcp\)p\)s\|
\(cvt\(ps2pi\|ss2pi\)\)\)" 
} 
 
if objdump -d $1 | grep_sse -q ; then 
   echo $1 
   objdump -d $1 | grep_sse 
fi 
 
and run my complete installation of kdecvs (-Os -march=pentium3) through it. 
 
# find /opt/kdecvs/ -type f -perm +111 | xargs -n 1 
bin/objdump_find_problematic | tee problematic.sse 
 
Among those found where 
	kfiresaver3d starting it will crash at a unaligned movaps 
	 (actual code from glibc-2.3) 
 
Complete list, some are OK with aligned offset: 
 
# more problematic.sse | grep "0x\|opt" 
/opt/kdecvs/bin/kdm_greet 
 805e5ac:       0f 29 85 98 fc ff ff    movaps %xmm0,0xfffffc98(%ebp) 
/opt/kdecvs/bin/keuphoria.kss 
 804fe6e:       0f 29 45 e0             movaps %xmm0,0xffffffe0(%ebp) 
 80500fd:       0f 29 45 d0             movaps %xmm0,0xffffffd0(%ebp) 
/opt/kdecvs/bin/kfiresaver3d 
 80502ac:       0f 29 85 7c ff ff ff    movaps %xmm0,0xffffff7c(%ebp) 
 8050529:       0f 29 85 64 ff ff ff    movaps %xmm0,0xffffff64(%ebp) 
/opt/kdecvs/lib/libartsflow.so.1.0.0 
/opt/kdecvs/lib/kde3/kdeprint_cups.so 
   4042d:       0f 29 45 8c             movaps %xmm0,0xffffff8c(%ebp) 
/opt/kdecvs/lib/kde3/kcm_clock.so 
    e294:       0f 29 85 20 fe ff ff    movaps %xmm0,0xfffffe20(%ebp) 
/opt/kdecvs/lib/kde3/libkiviopart.so 
   f8a94:       0f 29 45 a8             movaps %xmm0,0xffffffa8(%ebp) 
   f8d47:       0f 29 45 80             movaps %xmm0,0xffffff80(%ebp) 
   f90ad:       0f 29 85 5c ff ff ff    movaps %xmm0,0xffffff5c(%ebp) 
   fa0ac:       0f 29 45 a8             movaps %xmm0,0xffffffa8(%ebp) 
   fa305:       0f 29 45 a4             movaps %xmm0,0xffffffa4(%ebp) 
/opt/kdecvs/lib/kde3/libkpovmodelerpart.so.0.0.0 
/opt/kdecvs/lib/libkdefx.so.4.2.0 
/opt/kdecvs/lib/libnoatunarts.so 
   576d8:       0f 10 51 10             movups 0x10(%ecx),%xmm2 
   576dc:       0f c6 d2 00             shufps $0x0,%xmm2,%xmm2 
   576e0:       0f 10 61 14             movups 0x14(%ecx),%xmm4 
   576e4:       0f 10 69 24             movups 0x24(%ecx),%xmm5 
   57720:       0f c6 c8 b1             shufps $0xb1,%xmm0,%xmm1 
   57737:       0f c6 c5 24             shufps $0x24,%xmm5,%xmm0 
   5773b:       0f c6 e8 81             shufps $0x81,%xmm0,%xmm5 
   57743:       0f c6 db 39             shufps $0x39,%xmm3,%xmm3 
   57747:       0f c6 f6 39             shufps $0x39,%xmm6,%xmm6 
   57752:       0f 11 69 24             movups %xmm5,0x24(%ecx) 
   60ea4:       0f c6 c9 00             shufps $0x0,%xmm1,%xmm1 
   60ee6:       0f c6 c2 00             shufps $0x0,%xmm2,%xmm0 
   60ef5:       0f c6 c0 02             shufps $0x2,%xmm0,%xmm0 
 
This is a BIG problem! (kivio, and kfiresaver3d have been verified to crash) 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[thiagom at mail dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |thiagom at mail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[dhazeghi at yahoo dot com]

------- Additional Comments From dhazeghi at yahoo dot com  2004-01-18 18:07 -------
Your report seems to indicate that the problematic asm is produced all over the
place. Can you either provide preprocessed source, or (better, and if the
problem is widespread, should not be too difficult) a small, self-contained
testcase? Thanks.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2004-01-19 06:38 -------
I am currently trying to create a testcase - the instructions gets generated 
but I do not get it unaligned - to crash... 
 
-O1 -march=pentium3 
 
Gives the instructions (movaps) 
 
-O1 -march=pentium3 -mno-sse 
 
Is needed to avoid them. 
 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2004-01-19 08:11 -------
This is the shortest code yet (matrix.cpp) I found that generates the 
offending instruction (movaps) - but I have not yet succeeded in getting 
the stack unaligned... [Do you need that too?] 
 
class RTime 
{ 
public: 
    int minute() {} 
}; 
 
void rotate(float x) 
{ 
} 
 
int main() 
{ 
    RTime _time; 
 
    // hour 
    float h_angle = _time.minute(); 
    rotate(-h_angle); 
 
    // minute 
    float m_angle = _time.minute(); 
    rotate(-m_angle); 
} 
 
I am pretty sure that Qt should be simple to  
Compile with: 
gcc -I/usr/src/kde/qt-copy/mkspecs/linux-g++ -I../../include -o matrix.o 
-march=pentium3 -O1 matrix.cpp 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

Re: [Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[Jan Hubicka]

> 
> ------- Additional Comments From roger dot larsson at norran dot net  2004-01-19 08:11 -------
> This is the shortest code yet (matrix.cpp) I found that generates the 
> offending instruction (movaps) - but I have not yet succeeded in getting 
> the stack unaligned... [Do you need that too?] 

Roger,
I am not able to reproduce it from your testcase, but sending the
assembly file produces with g++ -O1 -march=pentium3 -dp -S will probably
give me enough information to fix it.

Thanks!
Honza
>  
> class RTime 
> { 
> public: 
>     int minute() {} 
> }; 
>  
> void rotate(float x) 
> { 
> } 
>  
> int main() 
> { 
>     RTime _time; 
>  
>     // hour 
>     float h_angle = _time.minute(); 
>     rotate(-h_angle); 
>  
>     // minute 
>     float m_angle = _time.minute(); 
>     rotate(-m_angle); 
> } 
>  
> I am pretty sure that Qt should be simple to  
> Compile with: 
> gcc -I/usr/src/kde/qt-copy/mkspecs/linux-g++ -I../../include -o matrix.o 
> -march=pentium3 -O1 matrix.cpp 
> 
> -- 
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[hubicka at ucw dot cz]

------- Additional Comments From hubicka at ucw dot cz  2004-01-19 10:42 -------
Subject: Re:  Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

> 
> ------- Additional Comments From roger dot larsson at norran dot net  2004-01-19 08:11 -------
> This is the shortest code yet (matrix.cpp) I found that generates the 
> offending instruction (movaps) - but I have not yet succeeded in getting 
> the stack unaligned... [Do you need that too?] 

Roger,
I am not able to reproduce it from your testcase, but sending the
assembly file produces with g++ -O1 -march=pentium3 -dp -S will probably
give me enough information to fix it.

Thanks!
Honza
>  
> class RTime 
> { 
> public: 
>     int minute() {} 
> }; 
>  
> void rotate(float x) 
> { 
> } 
>  
> int main() 
> { 
>     RTime _time; 
>  
>     // hour 
>     float h_angle = _time.minute(); 
>     rotate(-h_angle); 
>  
>     // minute 
>     float m_angle = _time.minute(); 
>     rotate(-m_angle); 
> } 
>  
> I am pretty sure that Qt should be simple to  
> Compile with: 
> gcc -I/usr/src/kde/qt-copy/mkspecs/linux-g++ -I../../include -o matrix.o 
> -march=pentium3 -O1 matrix.cpp 
> 
> -- 
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building KDE3.2 clock applet with -march=pentium3 -O1 gives SIGSEGV

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2004-01-19 12:48 -------
I guess no more WAITING is needed -> NEW 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|                            |1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2005-01-07 09:49 -------
Got a query about this bug...   
   
It is still valid for gcc 3.3.4   
My computer has been upgraded to a athlon-xp, so I tested both   
   
g++ -Os -march=pentium3 matrix.cpp -o matrix   
 and   
g++ -Os -march=athlon-xp matrix.cpp -o matrix   
   
they both gives Segmentation fault when running   
./matrix   
   
Other optimization levels works.  
   
Updated summary etc.  
   

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
           Priority|P2                          |P1
            Summary|Building KDE3.2 clock applet|Building simple test
                   |with -march=pentium3 -O1    |application with -
                   |gives SIGSEGV               |march=pentium3 -Os gives
                   |                            |SIGSEGV (unaligned sse
                   |                            |instruction)
            Version|3.3.1                       |3.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685