[Bug target/35222] New: [4.3 Regression] EH output contains procedure label without P' selector

[Bug target/35222] New: [4.3 Regression] EH output contains procedure label without P' selector

[danglin at gcc dot gnu dot org]

The link command for libstdc++.sl.6.10 fails:

libtool: link: /xxx/gnu/gcc/objdir/./gcc/xgcc -shared-libgcc
-B/xxx/gnu/gcc/objdir/./gcc -nostdinc++
-L/xxx/gnu/gcc/objdir/hppa1.1-hp-hpux10.20/threads/libstdc++-v3/src
-L/xxx/gnu/gcc/objdir/hppa1.1-hp-hpux10.20/threads/libstdc++-v3/src/.libs
-B/opt/gnu/gcc/gcc-4.3.0/hppa1.1-hp-hpux10.20/bin/
-B/opt/gnu/gcc/gcc-4.3.0/hppa1.1-hp-hpux10.20/lib/ -isystem
/opt/gnu/gcc/gcc-4.3.0/hppa1.1-hp-hpux10.20/include -isystem
/opt/gnu/gcc/gcc-4.3.0/hppa1.1-hp-hpux10.20/sys-include  -threads -shared
-nostdlib -fPIC -Wl,+h -Wl,libstdc++.sl.6 -Wl,+b
-Wl,/opt/gnu/gcc/gcc-4.3.0/lib/threads -o .libs/libstdc++.sl.6.10  
.libs/bitmap_allocator.o .libs/pool_allocator.o .libs/mt_allocator.o
.libs/codecvt.o .libs/compatibility.o .libs/complex_io.o .libs/ctype.o
.libs/debug.o .libs/functexcept.o .libs/hash.o .libs/hash_c++0x.o
.libs/globals_io.o .libs/hashtable.o .libs/hashtable_c++0x.o .libs/ios.o
.libs/ios_failure.o .libs/ios_init.o .libs/ios_locale.o .libs/limits.o
.libs/list.o .libs/debug_list.o .libs/locale.o .libs/locale_init.o
.libs/locale_facets.o .libs/localename.o .libs/stdexcept.o .libs/strstream.o
.libs/system_error.o .libs/tree.o .libs/allocator-inst.o .libs/concept-inst.o
.libs/fstream-inst.o .libs/ext-inst.o .libs/ios-inst.o .libs/iostream-inst.o
.libs/istream-inst.o .libs/istream.o .libs/locale-inst.o .libs/misc-inst.o
.libs/ostream-inst.o .libs/sstream-inst.o .libs/streambuf-inst.o
.libs/streambuf.o .libs/string-inst.o .libs/valarray-inst.o
.libs/wlocale-inst.o .libs/wstring-inst.o .libs/atomicity.o
.libs/codecvt_members.o .libs/collate_members.o .libs/ctype_members.o
.libs/messages_members.o .libs/monetary_members.o .libs/numeric_members.o
.libs/time_members.o .libs/basic_file.o .libs/c++locale.o  
.libs/libstdc++.lax/libmath.a/stubs.o .libs/libstdc++.lax/libmath.a/signbit.o
.libs/libstdc++.lax/libmath.a/signbitf.o 
.libs/libstdc++.lax/libsupc++convenience.a/array_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/atexit_arm.o
.libs/libstdc++.lax/libsupc++convenience.a/bad_cast.o
.libs/libstdc++.lax/libsupc++convenience.a/bad_typeid.o
.libs/libstdc++.lax/libsupc++convenience.a/class_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/del_op.o
.libs/libstdc++.lax/libsupc++convenience.a/del_opnt.o
.libs/libstdc++.lax/libsupc++convenience.a/del_opv.o
.libs/libstdc++.lax/libsupc++convenience.a/del_opvnt.o
.libs/libstdc++.lax/libsupc++convenience.a/dyncast.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_alloc.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_arm.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_aux_runtime.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_call.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_catch.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_exception.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_globals.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_personality.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_term_handler.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_terminate.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_throw.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_type.o
.libs/libstdc++.lax/libsupc++convenience.a/eh_unex_handler.o
.libs/libstdc++.lax/libsupc++convenience.a/enum_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/function_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/fundamental_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/guard.o
.libs/libstdc++.lax/libsupc++convenience.a/new_handler.o
.libs/libstdc++.lax/libsupc++convenience.a/new_op.o
.libs/libstdc++.lax/libsupc++convenience.a/new_opnt.o
.libs/libstdc++.lax/libsupc++convenience.a/new_opv.o
.libs/libstdc++.lax/libsupc++convenience.a/new_opvnt.o
.libs/libstdc++.lax/libsupc++convenience.a/pbase_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/pmem_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/pointer_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/pure.o
.libs/libstdc++.lax/libsupc++convenience.a/si_class_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/tinfo.o
.libs/libstdc++.lax/libsupc++convenience.a/tinfo2.o
.libs/libstdc++.lax/libsupc++convenience.a/vec.o
.libs/libstdc++.lax/libsupc++convenience.a/vmi_class_type_info.o
.libs/libstdc++.lax/libsupc++convenience.a/vterminate.o
.libs/libstdc++.lax/libsupc++convenience.a/cp-demangle.o  
-L/xxx/gnu/gcc/objdir/hppa1.1-hp-hpux10.20/threads/libstdc++-v3/src
-L/xxx/gnu/gcc/objdir/hppa1.1-hp-hpux10.20/threads/libstdc++-v3/src/.libs -lm
-L/xxx/gnu/gcc/objdir/./gcc/threads -L/xxx/gnu/gcc/objdir/./gcc -L/usr/ccs/lib
-L/opt/langtools/lib -lgcc_s   -threads -threads  -threads  -threads  -threads 
-threads
/usr/ccs/bin/ld: Procedure labels require the P' selector - use the P' selector
on code symbol "$CODE$" in file .libs/pool_allocator.o
collect2: ld returned 1 exit status
make[8]: *** [libstdc++.la] Error 1

Looking at the assembler output for pool_allocator.cc, I see the following:

        .SPACE $PRIVATE$
        .SUBSPA $DATA$

        .align 4
        .EXPORT
_GLOBAL__F_.._.._.._.._.._gcc_libstdc___v3_src_pool_allocator.cc
_79739C6C_A6218F4D,DATA
_GLOBAL__F_.._.._.._.._.._gcc_libstdc___v3_src_pool_allocator.cc_79739C6C_A6218F
4D:
L$frame0001:
        .word   L$ECIE0001-L$SCIE0001
L$SCIE0001:
        .word   0x0
        .byte   0x1
        .STRING "zPL\x00"
        .uleb128 0x1
        .sleb128 4
        .byte   0x2
        .uleb128 0x8
        .byte   0x50
        .align 4
        .word   P%__gxx_personality_v0
        .byte   0x0
        .byte   0xc
        .uleb128 0x1e
        .uleb128 0x0
        .align 4
L$ECIE0001:
L$SFDE0005:
        .word   L$EFDE0005-L$ASFDE0005
L$ASFDE0005:
        .word   L$ASFDE0005-L$frame0001
        .word   L$FB0098
        .word   L$FE0098-L$FB0098
        .uleb128 0x4
           ...

L$FB0098 is a function label:

        .SPACE $TEXT$
        .NSUBSPA $CODE$
        .align 4
        .EXPORT
_ZN9__gnu_cxx17__pool_alloc_base16_M_get_free_listEj,ENTRY,PRIV_
LEV=3,ARGW0=GR,ARGW1=GR,RTNVAL=GR
L$FB0098:
_ZN9__gnu_cxx17__pool_alloc_base16_M_get_free_listEj:
        .PROC
        .CALLINFO FRAME=0,NO_CALLS
        .ENTRY
        ldo 7(%r25),%r28

This is the cause of the error.  I'm not sure why we are missing
the P' selector in 4.3, but this works in 4.2.


-- 
           Summary: [4.3 Regression] EH output contains procedure label
                    without P' selector
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: danglin at gcc dot gnu dot org
 GCC build triplet: hppa1.1-hp-hpux10.20
  GCC host triplet: hppa1.1-hp-hpux10.20
GCC target triplet: hppa1.1-hp-hpux10.20


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3 Regression] EH output contains procedure label without P' selector

[danglin at gcc dot gnu dot org]

------- Comment #1 from danglin at gcc dot gnu dot org  2008-02-16 23:37 -------
Breakpoint 3, dw2_asm_output_encoded_addr_rtx (encoding=0, addr=0x7ab0fdd0,
    public=0 '\000', comment=0x5792c "FDE initial location")
    at ../../gcc/gcc/dwarf2asm.c:841
841       if (encoding == DW_EH_PE_aligned)
(gdb) p debug_rtx (addr)
(symbol_ref:SI ("*L$FB0098") [flags 0x2])

The encoding seems wrong.  Expected DW_EH_PE_aligned.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3 Regression] EH output contains procedure label without P' selector

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3 Regression] EH output contains procedure label without P' selector

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #2 from dave at hiauly1 dot hia dot nrc dot ca  2008-02-17 03:29 -------
Subject: Re:  [4.3 Regression] EH output contains procedure label without P'
selector

> The encoding seems wrong.  Expected DW_EH_PE_aligned.

Actually, the encoding is correct.  The procedure label error
only occurs is the symbol is an unsat.  This might might occur
if we have EH data for a function that has been eliminated.

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3 Regression] EH output contains procedure label without P' selector

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2008-02-17 15:58 -------
Does this also fail for hppa2.0w-hp-hpux11.11 which would be a secondary target
unlike hppa1.1-hp-hpux10.20 which is neither primary nor secondary?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3 Regression] EH output contains procedure label without P' selector

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #4 from dave at hiauly1 dot hia dot nrc dot ca  2008-02-17 16:45 -------
Subject: Re:  [4.3 Regression] EH output contains procedure label without P'
selector

> Does this also fail for hppa2.0w-hp-hpux11.11 which would be a secondary target
> unlike hppa1.1-hp-hpux10.20 which is neither primary nor secondary?

It doesn't affect hppa2.0w-hp-hpux11.11.  There is a difference in the
methods used to achieve one-only support.  hppa2.0w-hp-hpux11.11 uses
secondary definitions and hppa1.1-hp-hpux10.20 COMDAT subspaces.

My current understanding of the problem is that the error occurs
when a COMDAT subspace is not used.  This leads to the situation
where the local symbols referenced in the EH data no longer are
satisfied.  It's still a puzzle as to why this didn't appear before.

I'm testing a one line fix to the encoding to add the P' descriptor.
This isn't exactly obvious as normally when the P' descriptor is used
the pointer ends up pointing to a function descriptor rather than
to the label in the code.  However, in this case, the labels are
local and not exported.  I think the linker is smart enough in this
case to create a direct pointer.  I'm hoping in the COMDAT case that
a function descriptor will be created and there won't be problems
with unresolved symbols.

If the above doesn't work, I have a small change to config.gcc to
force sjlj exception suport.

I've been trying to test the above change but hit the libstdc++
breakage on head.  I have had one successful build with the change
on hppa64-hp-hpux11.11 using 4.2.4.  libstdc++ builds with the
change on hppa2.0w-hp-hpux11.11 on head.  Unfortunately, my
hppa1.1-hp-hpux10.20 system is somewhat slow and I'm just restarting
the build there.  I'm also testing with 11.00.

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3/4.4 Regression] EH output contains procedure label without P' selector

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Priority|P3                          |P4
   Last reconfirmed|0000-00-00 00:00:00         |2008-03-03 16:22:12
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3/4.4 Regression] EH output contains procedure label without P' selector

[dave at hiauly1 dot hia dot nrc dot ca]

------- Comment #5 from dave at hiauly1 dot hia dot nrc dot ca  2008-03-03 16:33 -------
Subject: Re:  [4.3/4.4 Regression] EH output contains procedure label without
P' selector

The same fail occurs on hpux11 if I disable the use of secondary
definition symbols for one-only support.

Have tested all the alternatives that I can think of for the EH
encoding (pc-relative, indirect through function descriptor, etc)
and they all lead to linker warnings and segmentation faults linking
shared libraries.  So, I believe that the only viable work around
is to force the use of sjlj exceptions.

I'm testing a patch to configure.ac to do this and will submit as
soon as I know that libstdc++ links successfully..

Dave


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3/4.4 Regression] EH output contains procedure label without P' selector

[danglin at gcc dot gnu dot org]

------- Comment #6 from danglin at gcc dot gnu dot org  2008-03-04 23:31 -------
Subject: Bug 35222

Author: danglin
Date: Tue Mar  4 23:30:47 2008
New Revision: 132876

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=132876
Log:
        PR target/35222
        * configure.ac (CONFIG_SJLJ_EXCEPTIONS): Force SJLJ exceptions
        on hpux10.
        * configure: Rebuilt.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/configure
    trunk/gcc/configure.ac


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3/4.4 Regression] EH output contains procedure label without P' selector

[danglin at gcc dot gnu dot org]

------- Comment #7 from danglin at gcc dot gnu dot org  2008-03-04 23:39 -------
Subject: Bug 35222

Author: danglin
Date: Tue Mar  4 23:39:11 2008
New Revision: 132877

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=132877
Log:
        PR target/35222
        * configure.ac (CONFIG_SJLJ_EXCEPTIONS): Force SJLJ exceptions
        on hpux10.
        * configure: Rebuilt.


Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/configure
    branches/gcc-4_3-branch/gcc/configure.ac


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3/4.4 Regression] EH output contains procedure label without P' selector

[danglin at gcc dot gnu dot org]

------- Comment #8 from danglin at gcc dot gnu dot org  2008-03-05 01:11 -------
Patch to force use of sjlj applied to trunk and 4.3.


-- 

danglin at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222

[Bug target/35222] [4.3/4.4 Regression] EH output contains procedure label without P' selector

[danglin at gcc dot gnu dot org]

------- Comment #9 from danglin at gcc dot gnu dot org  2008-03-12 00:57 -------
Subject: Bug 35222

Author: danglin
Date: Wed Mar 12 00:56:34 2008
New Revision: 133131

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=133131
Log:
        PR target/35222
        * configure.ac (CONFIG_SJLJ_EXCEPTIONS): Force SJLJ exceptions
        on hpux10.
        * configure: Rebuilt.


Modified:
    branches/gcc-4_2-branch/gcc/ChangeLog
    branches/gcc-4_2-branch/gcc/configure
    branches/gcc-4_2-branch/gcc/configure.ac


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35222