[Bug middle-end/25840] New: libjava is broken on Linux/x86-64

[Bug middle-end/25840] New: libjava is broken on Linux/x86-64

[hjl at lucon dot org]

This patch

http://gcc.gnu.org/ml/gcc-patches/2006-01/msg00463.html

breaks libjava on Linux/x86-64. I got many libjavaa failures:

[hjl@gnu-16 testsuite]$ gdb ./PR9577
GNU gdb Red Hat Linux (6.3.0.0-1.63rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu"...Using host libthread_db
library "/lib64/tls/libthread_db.so.1".

(gdb) r
Starting program:
/export/build/gnu/gcc-next/build-x86_64-linux/x86_64-unknown-linux-gnu/libjava/testsuite/PR9577
[Thread debugging using libthread_db enabled]
[New Thread 182928830848 (LWP 985)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 182928830848 (LWP 985)]
0x0000000000000005 in ?? ()
(gdb) bt
#0  0x0000000000000005 in ?? ()
#1  0x0000002a96bb7b52 in __do_global_ctors_aux ()
   from
/export/build/gnu/gcc-next/build-x86_64-linux/x86_64-unknown-linux-gnu/./libjava/.libs/libgcj.so.7
#2  0x0000002a96653b73 in _init ()
   from
/export/build/gnu/gcc-next/build-x86_64-linux/x86_64-unknown-linux-gnu/./libjava/.libs/libgcj.so.7
#3  0x0000002a97685940 in ?? ()
#4  0x0000003d7c40ac7f in _dl_init_internal () from /lib64/ld-linux-x86-64.so.2
#5  0x0000003d7c400abb in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#6  0x0000000000000001 in ?? ()
#7  0x0000007fbffff96c in ?? ()
#8  0x0000000000000000 in ?? ()
(gdb)


-- 
           Summary: libjava is broken on Linux/x86-64
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl at lucon dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] libjava is broken on Linux/x86-64

[hjl at lucon dot org]

------- Comment #1 from hjl at lucon dot org  2006-01-18 14:40 -------
See

http://gcc.gnu.org/ml/gcc-testresults/2006-01/msg00924.html


-- 

hjl at lucon dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-01-18 14:40:59
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major
           Keywords|                            |wrong-code
            Summary|libjava is broken on        |[4.2 Regression] libjava is
                   |Linux/x86-64                |broken on Linux/x86-64
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[ian at airs dot com]

------- Comment #2 from ian at airs dot com  2006-01-18 17:04 -------
I just reconfirmed that I don't see any problems running the libjava testsuite
on i686-pc-linux-gnu.  And I don't have access to any x86_64 systems.  So I
can't recreate this problem myself.

The backtrace suggests that there is some problem in the crt0 file.  Can you
please try building crtbegin.o and crtend.o with -fno-unit-at-a-time and with
-fno-toplevel-reorder.  I changed the default from the former to the latter. 
There shouldn't be any significant differences between the two.  If there are,
please let me know.

I'll try building a cross-compiler to x86_64-linux to try this myself.  I may
run into header file problems; I'll see.


-- 

ian at airs dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |ian at airs dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-01-18 14:40:59         |2006-01-18 17:04:42
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[ian at airs dot com]

------- Comment #3 from ian at airs dot com  2006-01-18 17:39 -------
Building a cross-compiler did not shed any light on the problem.

Can anybody provide more information about what is going wrong?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at lucon dot org]

------- Comment #4 from hjl at lucon dot org  2006-01-18 17:47 -------
I rebuilt crt*.o* with -fno-toplevel-reorder -fno-unit-at-a-time and
recreated lib*.so. I still have the same problem.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at lucon dot org]

------- Comment #5 from hjl at lucon dot org  2006-01-18 18:48 -------
I found this in my build log

creating gcj-dbtool ./gcj-dbtool -n classmap.db || touch classmap.db
creating gij /bin/sh: line 1: 17842 Segmentation fault      ./gcj-dbtool -n
classmap.db
make[5]: Leaving directory
`/export/build/gnu/gcc-next/build-x86_64-linux/x86_64-unknown-linux-gnu/libjava' 

Why doesn't libjava stop?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at lucon dot org]

------- Comment #6 from hjl at lucon dot org  2006-01-18 19:23 -------
It looks like gcc puts some junks in .ctors section:

[hjl@gnu-16 .libs]$ objdump -s -j .ctors libgcj.so.7

libgcj.so.7:     file format elf64-x86-64

Contents of section .ctors:
 190c000 ffffffff ffffffff 00000000 00000000  ................
 190c010 60cdfe00 00000000 00000000 00000000  `...............
 190c020 48c7c00f 0000000f 05000000 00000000  H...............
 190c030 00200001 00000000 00000000 00000000  . ..............
 190c040 48c7c00f 0000000f 05000000 00000000  H...............
 190c050 d03f0101 00000000 10605101 00000000  .?.......`Q.....
 190c060 20605101 00000000 30605101 00000000   `Q.....0`Q.....
 190c070 40605101 00000000 50605101 00000000  @`Q.....P`Q.....
 190c080 60605101 00000000 70605101 00000000  ``Q.....p`Q.....
 190c090 80605101 00000000 90605101 00000000  .`Q......`Q.....
 190c0a0 a0605101 00000000 00000000 00000000  .`Q.............

The "05000000" entry is bogus.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2006-01-18 19:30 -------
Hmm:
interpret.o:     file format elf64-x86-64

Contents of section .ctors:
 0000 00000000 00000000 00000000 00000000  ................
 0010 48c7c00f 0000000f 05                 H........       
prims.o:     file format elf64-x86-64

Contents of section .ctors:
 0000 00000000 00000000 00000000 00000000  ................
 0010 48c7c00f 0000000f 05                 H........       


Those are the two ctors might have caused this.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2006-01-18 19:31 -------
Both prims.o and interpret.o are created from C++ code.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug middle-end/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at lucon dot org]

------- Comment #9 from hjl at lucon dot org  2006-01-18 19:34 -------
Looks at interpret.s

.Ldebug_line0:
        .text
.Ltext0:
        .section        .ctors,"aw",@progbits
        .align 8
        .quad   _GLOBAL__I__Jv_soleInterpreterEngine
#APP
        .byte 0  # Yes, this really is necessary

.text is missing here.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[pinskia at gcc dot gnu dot org]

------- Comment #10 from pinskia at gcc dot gnu dot org  2006-01-18 19:39 -------
(In reply to comment #9)
> Looks at interpret.s

This is a bug in java-signal.h:
# 61 "./include/java-signal.h"
asm ( ".byte 0  # Yes, this really is necessary\n" ".align 16\n" "__"
"restore_rt" ":\n" "      movq $" "15" ", %rax\n" "       syscall\n" );

There is no .text in the source in the first place so we were just getting
lucky before.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|middle-end                  |libgcj


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at lucon dot org]

------- Comment #11 from hjl at lucon dot org  2006-01-18 19:48 -------
I am testing this patch now:

http://gcc.gnu.org/ml/gcc-patches/2006-01/msg01192.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at gcc dot gnu dot org]

------- Comment #12 from hjl at gcc dot gnu dot org  2006-01-18 20:04 -------
Subject: Bug 25840

Author: hjl
Date: Wed Jan 18 20:04:50 2006
New Revision: 109909

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=109909
Log:
2006-01-18  H.J. Lu  <hongjiu.lu@intel.com>

        PR libgcj/25840
        * include/x86_64-signal.h (RESTORE2): Add ".text\n".

Modified:
    trunk/libjava/ChangeLog
    trunk/libjava/include/x86_64-signal.h


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[pinskia at gcc dot gnu dot org]

------- Comment #13 from pinskia at gcc dot gnu dot org  2006-01-19 00:53 -------
Fixed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at gcc dot gnu dot org]

------- Comment #14 from hjl at gcc dot gnu dot org  2006-01-19 14:42 -------
Subject: Bug 25840

Author: hjl
Date: Thu Jan 19 14:42:47 2006
New Revision: 109958

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=109958
Log:
2006-01-19  H.J. Lu  <hongjiu.lu@intel.com>

        PR libgcj/25840
        * include/x86_64-signal.h (RESTORE2): Add ".text\n".

Modified:
    branches/gcc-4_1-branch/libjava/ChangeLog
    branches/gcc-4_1-branch/libjava/include/x86_64-signal.h


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at gcc dot gnu dot org]

------- Comment #15 from hjl at gcc dot gnu dot org  2006-01-19 14:43 -------
Subject: Bug 25840

Author: hjl
Date: Thu Jan 19 14:43:21 2006
New Revision: 109959

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=109959
Log:
2006-01-19  H.J. Lu  <hongjiu.lu@intel.com>

        PR libgcj/25840
        * include/x86_64-signal.h (RESTORE2): Add ".text\n".

Modified:
    branches/gcc-4_0-branch/libjava/ChangeLog
    branches/gcc-4_0-branch/libjava/include/x86_64-signal.h


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840

[Bug libgcj/25840] [4.2 Regression] libjava is broken on Linux/x86-64

[hjl at gcc dot gnu dot org]

------- Comment #16 from hjl at gcc dot gnu dot org  2006-01-19 14:43 -------
Subject: Bug 25840

Author: hjl
Date: Thu Jan 19 14:43:44 2006
New Revision: 109960

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=109960
Log:
2006-01-19  H.J. Lu  <hongjiu.lu@intel.com>

        PR libgcj/25840
        * include/x86_64-signal.h (RESTORE2): Add ".text\n".

Modified:
    branches/gcc-3_4-branch/libjava/ChangeLog
    branches/gcc-3_4-branch/libjava/include/x86_64-signal.h


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25840