[Bug middle-end/39101] New: [4.4 Regression] Null pointer dereference in delay slot

[Bug middle-end/39101] New: [4.4 Regression] Null pointer dereference in delay slot

[danglin at gcc dot gnu dot org]

...
mkdir -p ada/bldtools/sinfo
rm -f ada/bldtools/sinfo/sinfo.ads ada/bldtools/sinfo/xsinfo.adb
cp -p ../../gcc/gcc/ada/sinfo.ads ../../gcc/gcc/ada/xsinfo.adb
ada/bldtools/sinfo
(cd ada/bldtools/sinfo && gnatmake -q xsinfo && ./xsinfo ../../sinfo.h )
/bin/sh: line 1: 13373 Segmentation fault      (core dumped) ./xsinfo
../../sinfo.h
make[3]: *** [ada/sinfo.h] Error 139

dave@hiauly6:~/gnu/gcc-4.4/objdir/gcc/ada/bldtools/sinfo$ gdb -c core xsinfo
GNU gdb (GDB) 6.8.50.20080917-cvs
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "hppa-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
BFD: Warning: /home/dave/gnu/gcc-4.4/objdir/gcc/ada/bldtools/sinfo/core is
truncated: expected core file size >= 1658880, found: 1601536.
Reading symbols from
/home/dave/gnu/gcc-4.4/objdir/prev-gcc/libgcc_s.so.4...done.
Loaded symbols for /home/dave/gnu/gcc-4.4/objdir/./prev-gcc/libgcc_s.so.4
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld.so.1...done.
Loaded symbols for /lib/ld.so.1
Core was generated by `./xsinfo ../../sinfo.h'.
Program terminated with signal 11, Segmentation fault.
#0  0x403f15a8 in _Unwind_Find_FDE (pc=0x403ef63b, bases=0xfb283efc)
    at ../../../gcc/libgcc/../gcc/unwind-dw2-fde.c:979
979     ../../../gcc/libgcc/../gcc/unwind-dw2-fde.c: No such file or directory.
        in ../../../gcc/libgcc/../gcc/unwind-dw2-fde.c
(gdb) bt
#0  0x403f15a8 in _Unwind_Find_FDE (pc=0x403ef63b, bases=0xfb283efc)
    at ../../../gcc/libgcc/../gcc/unwind-dw2-fde.c:979
#1  0x403ee128 in uw_frame_state_for (context=0xfb283d88, fs=0xfb28454c)
    at ../../../gcc/libgcc/../gcc/unwind-dw2.c:1129
#2  0x403eeb68 in uw_init_context_1 (context=0xfb283d88, outer_cfa=0xfb283d80, 
    outer_ra=0x1cdc3) at ../../../gcc/libgcc/../gcc/unwind-dw2.c:1435
#3  0x403ef63c in _Unwind_RaiseException (exc=0x76ec0)
    at ../../../gcc/libgcc/../gcc/unwind.inc:93
#4  0x0001cdc0 in ada.exceptions.exception_propagation.propagate_exception (
    e=<value optimized out>, from_signal_handler=<value optimized out>)
    at a-exexpr.adb:588
#5  0x0001ce3c in <__gnat_raise_nodefer_with_msg> (e=0x403ef63b)
    at a-except.adb:817
#6  0x0001d4c4 in <__gnat_raise_exception> (e=0x6d120, 
    message=<value optimized out>) at a-except.adb:856
#7  0x0001ac3c in xsinfo__getline___1032 ()
#8  0x0001a2cc in _ada_xsinfo ()
(gdb) disass 0x403f1598 0x403f15b8
Dump of assembler code from 0x403f1598 to 0x403f15b8:
0x403f1598 <_Unwind_Find_FDE+92>:       addil L%0,r19,r1
0x403f159c <_Unwind_Find_FDE+96>:       ldw cc(r1),r10
0x403f15a0 <_Unwind_Find_FDE+100>:      ldw 0(r10),r6
0x403f15a4 <_Unwind_Find_FDE+104>:      cmpib,<> 0,r6,0x403f15bc
<_Unwind_Find_FDE+128>
0x403f15a8 <_Unwind_Find_FDE+108>:      ldw 0(r6),ret0
0x403f15ac <_Unwind_Find_FDE+112>:      b,l 0x403f1684
<_Unwind_Find_FDE+328>,r0
0x403f15b0 <_Unwind_Find_FDE+116>:      addil L%0,r19,r1
0x403f15b4 <_Unwind_Find_FDE+120>:      cmpib,= 0,r6,0x403f1680
<_Unwind_Find_FDE+324>
End of assembler dump.
(gdb) p/x $r6
$1 = 0x0
(gdb) p/x *(int *)$r10
$2 = 0x0


-- 
           Summary: [4.4 Regression] Null pointer dereference in delay slot
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: danglin at gcc dot gnu dot org
 GCC build triplet: hppa-unknown-linux-gnu
  GCC host triplet: hppa-unknown-linux-gnu
GCC target triplet: hppa-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[danglin at gcc dot gnu dot org]

------- Comment #1 from danglin at gcc dot gnu dot org  2009-02-05 04:22 -------
This occurs in stage2 with

dave@hiauly6:~/gnu/gcc-4.4/objdir/prev-gcc$ ./xgcc -B./ -v
Reading specs from ./specs
Target: hppa-linux
Configured with: ../gcc/configure --with-gnu-as --with-gnu-ld --enable-shared
--prefix=/home/dave/opt/gnu/gcc/gcc-4.4.0
--with-local-prefix=/home/dave/opt/gnu --enable-threads=posix
--enable-__cxa_atexit --build=hppa-linux --enable-clocale=gnu
--enable-java-gc=boehm --enable-java-awt=xlib
--enable-languages=c,c++,objc,fortran,obj-c++,java,ada
Thread model: posix
gcc version 4.4.0 20090205 (experimental) [trunk revision 143949] (GCC) 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[danglin at gcc dot gnu dot org]

------- Comment #2 from danglin at gcc dot gnu dot org  2009-02-05 04:29 -------
Bootstrap is also broken on hppa64-hp-hpux11.11:

...
/test/gnu/gcc/objdir/./prev-gcc/xgcc -B/test/gnu/gcc/objdir/./prev-gcc/
-B/opt/g
nu64/gcc/gcc-4.4.0/hppa64-hp-hpux11.11/bin/  -g -O2 -DIN_GCC   -W -Wall
-Wwrite-
strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual
-Wold-style-definit
ion -Wc++-compat -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variad
ic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H
-DGENERAT
OR_FILE  -o build/gengenrtl \
            build/gengenrtl.o build/errors.o .././libiberty/libiberty.a
build/genmodes -m > tmp-min-modes.c
/bin/sh: 12659 Memory fault(coredump)
make[3]: *** [s-modes-m] Error 139


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-02-05 10:10 -------
Can you see which revision caused this?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|hppa-unknown-linux-gnu      |
   GCC host triplet|hppa-unknown-linux-gnu      |
 GCC target triplet|hppa-unknown-linux-gnu      |hppa64-hp-hpux11.11, hppa-
                   |                            |unknown-linux-gnu
           Keywords|                            |build, wrong-code
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[bonzini at gnu dot org]

------- Comment #4 from bonzini at gnu dot org  2009-02-05 16:37 -------
Maybe a dup of 39110 -- try revision 143938.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #5 from dave at hiauly1 dot hia dot nrc dot ca  2009-02-05 16:53 -------
Subject: Re:  [4.4 Regression] Null pointer dereference in delay slot

> Maybe a dup of 39110 -- try revision 143938.

I'm reconfirming, but I believe 143938 is ok.  The problem
is present with 143939.

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[bonzini at gnu dot org]

------- Comment #6 from bonzini at gnu dot org  2009-02-05 17:05 -------
That would indeed make it a dup.  (I meant 143938 would be the last good
build).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101

[Bug middle-end/39101] [4.4 Regression] Null pointer dereference in delay slot

[bonzini at gnu dot org]

------- Comment #7 from bonzini at gnu dot org  2009-02-05 18:14 -------
every strict alignment platform is broken.

*** This bug has been marked as a duplicate of 39110 ***


-- 

bonzini at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39101