[Bug target/42850] [4.5 Regression] FAIL: g++.dg/abi/forced.C execution test

[danglin at gcc dot gnu dot org]

------- Comment #3 from danglin at gcc dot gnu dot org  2010-01-31 16:32 -------
The failure was introduced by my change to the libgcc_s so version.  With
the change, the array dwarf_reg_size_table is no longer initialized.  It
appears that glibc has an implicit dependence on libgcc_s:

Breakpoint 4, __gxx_personality_v0 (version=1, actions=10, exception_class=0, 
    ue_header=0x40002408, context=0xbff01630)
    at ../../../../gcc/libstdc++-v3/libsupc++/eh_personality.cc:361
361     {
(gdb) bt
#0  __gxx_personality_v0 (version=1, actions=10, exception_class=0, 
    ue_header=0x40002408, context=0xbff01630)
    at ../../../../gcc/libstdc++-v3/libsupc++/eh_personality.cc:361
#1  0x400c6028 in _Unwind_ForcedUnwind_Phase2 (exc=0x40002408, 
    context=0xbff01630) at ../../../src/libgcc/../gcc/unwind.inc:175
#2  0x400c6170 in _Unwind_ForcedUnwind (exc=0x40002408, 
    stop=@0x401a83a6: 0x4019e838 <unwind_stop>, stop_argument=0xbff011d0)
    at ../../../src/libgcc/../gcc/unwind.inc:207
#3  0x401a1eec in _Unwind_ForcedUnwind (exc=0x40002408, 
    stop=@0x401a83a6: 0x4019e838 <unwind_stop>, stop_argument=0xbff011d0)
    at ../ports/sysdeps/unix/sysv/linux/hppa/nptl/unwind-forcedunwind.c:133
#4  0x4019e7d8 in *__GI___pthread_unwind (buf=0x0) at unwind.c:130
#5  0x40193994 in __do_cancel (value=<value optimized out>) at pthreadP.h:265
#6  __pthread_exit (value=<value optimized out>) at pthread_exit.c:30
#7  0x00010784 in main ()
    at /home/dave/gnu/gcc/gcc/gcc/testsuite/g++.dg/abi/forced.C:13

The problem is two copies of libgcc_s.

Breakpoint 5, main ()
    at /home/dave/gnu/gcc/gcc/gcc/testsuite/g++.dg/abi/forced.C:13
13            pthread_exit (0);
Current language:  auto
The current source language is "auto; currently c++".
(gdb) info shared
>From        To          Syms Read   Shared Object Library
0x402673c0  0x4027fef0  Yes (*)     /lib/ld.so.1
0x4039a350  0x40420c6c  Yes        
/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.libs/libstdc++.so.6
0x404c4658  0x404fd5a8  Yes (*)     /lib/libm.so.6
0x4014fa40  0x4015c330  Yes         /home/dave/gnu/gcc/objdir/gcc/libgcc_s.so.6
0x4018f8e0  0x401a405c  Yes (*)     /lib/libpthread.so.0
0x40921e00  0x40a2d1f0  Yes (*)     /lib/libc.so.6

(gdb) enable 6
(gdb) c
Continuing.

Breakpoint 6, 0x401a1ee4 in _Unwind_ForcedUnwind (exc=0x40002408, 
    stop=@0x401a83a6: 0x4019e838 <unwind_stop>, stop_argument=0xbff011d0)
    at ../ports/sysdeps/unix/sysv/linux/hppa/nptl/unwind-forcedunwind.c:133
133     ../ports/sysdeps/unix/sysv/linux/hppa/nptl/unwind-forcedunwind.c: No
such file or directory.
        in ../ports/sysdeps/unix/sysv/linux/hppa/nptl/unwind-forcedunwind.c
Current language:  auto
The current source language is "auto; currently c".
(gdb) info shared
>From        To          Syms Read   Shared Object Library
0x402673c0  0x4027fef0  Yes (*)     /lib/ld.so.1
0x4039a350  0x40420c6c  Yes        
/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.libs/libstdc++.so.6
0x404c4658  0x404fd5a8  Yes (*)     /lib/libm.so.6
0x4014fa40  0x4015c330  Yes         /home/dave/gnu/gcc/objdir/gcc/libgcc_s.so.6
0x4018f8e0  0x401a405c  Yes (*)     /lib/libpthread.so.0
0x40921e00  0x40a2d1f0  Yes (*)     /lib/libc.so.6
0x400bca70  0x400c98dc  Yes (*)     /lib/libgcc_s.so.4
(*): Shared library is missing debugging information.
(gdb) bt
#0  0x401a1ee4 in _Unwind_ForcedUnwind (exc=0x40002408, 
    stop=@0x401a83a6: 0x4019e838 <unwind_stop>, stop_argument=0xbff011d0)
    at ../ports/sysdeps/unix/sysv/linux/hppa/nptl/unwind-forcedunwind.c:133
#1  0x4019e7d8 in *__GI___pthread_unwind (buf=0xbff011d0) at unwind.c:130
#2  0x40193994 in __do_cancel (value=<value optimized out>) at pthreadP.h:265
#3  __pthread_exit (value=<value optimized out>) at pthread_exit.c:30
#4  0x00010784 in main ()
    at /home/dave/gnu/gcc/gcc/gcc/testsuite/g++.dg/abi/forced.C:13

This is with LD_LIBRARY_PATH set as follows:

export
LD_LIBRARY_PATH=.:/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.libs:/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.libs:/home/dave/gnu/gcc/objdir/gcc:.:/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.libs:/home/dave/gnu/gcc/objdir/hppa-linux/./libstdc++-v3/src/.libs:/home/dave/gnu/gcc/objdir/gcc

I looked all the application and all the libraries used by the application,
and none has a dependence on /lib/libgcc_s.so.4.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42850