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From "Scott (Yu) Zhong (JIRA)" <j...@apache.org>
Subject [jira] Created: (STDCXX-196) IBM VAC++ 8.0 SELS 9.2 libsup++ seg fault .__cxa_get_globals_fast ()
Date Mon, 05 Jun 2006 19:14:29 GMT
IBM VAC++ 8.0 SELS 9.2 libsup++ seg fault .__cxa_get_globals_fast ()
--------------------------------------------------------------------

         Key: STDCXX-196
         URL: http://issues.apache.org/jira/browse/STDCXX-196
     Project: C++ Standard Library
        Type: Bug

  Components: 19. Diagnostics, 27. Input/Output, TR1.6 - Containers  
    Versions: 4.1.3    
 Environment: SuSE SLES 9sp2 (ppc64), IBM XL C/C++ Advanced Edition V8.0 for Linux 
Version: 08.00.0000.0000 
    Reporter: Scott (Yu) Zhong


I'm working on a problem with tests/stdlib/string/io.cpp, it is seg faulting at exception.cpp.
I noticed when I used gdb64 to debug it, it would call "throw (__rw_failure&)" twice in
the __rw_throw_exception function.  Can this be the cause of seg fault? When it calls throw
twice?  

Looking at other failed stdlib test causes me to think .__cxa_get_globals_fast () in libsup++
is the most likely cause of segmentation faults in those test. (See gdb64 outputs)

affected tests so far:

tests/stdlib/containers/bitset_io
tests/stdlib/containers/vector_modifiers
tests/stdlib/iostream/istream_manip
tests/stdlib/string/io

------------ gdb64 of tests/stdlib/string/io ----------------------

Breakpoint 11, test_extractor<char> (t=@0x1ffffffe3b0, line=646, init_state=__rw_goodbit,
flags=__rw_skipws, width=0, str=0x100a13e8 "", 
    consumed=0, expect_str=0x0, expect_state=__rw_eof_fail) at io.cpp:414
414                 istrm2 >> val;

(more code in between) 

__rw::__rw_throw_exception (id=17, what=0x100fb480 "user-defined: stream object has set failbit,
eofbit") at exception.cpp:646
646     {
(gdb) n
655         switch (id) {
(gdb) 
732             throw (__rw_failure&)
(gdb) 
733                 __rw_failure ()._C_assign (what, 0);
(gdb) 
732             throw (__rw_failure&)
(gdb) 

(gdb) run
Starting program: /build/scottz/ed9/tests/stdlib/string/stdlib_rs/io 

Program received signal SIGSEGV, Segmentation fault.
0x0000000010097148 in .__cxa_get_globals_fast ()
(gdb) where
#0  0x0000000010097148 in .__cxa_get_globals_fast ()
#1  0x0000000010096c58 in .__cxa_end_catch ()
#2  0x000000001000f390 in std::operator>><char, std::char_traits<char>, std::allocator<char>
> (__is=@0x1ffffffd930, __str=@0x1ffffffd628)
    at istream.cc:847
#3  0x00000000100121f8 in test_extractor<char> (t=@0x1ffffffe3b0, line=646, init_state=__rw_goodbit,
flags=__rw_skipws, width=0, 
    str=0x100a13e8 "", consumed=0, expect_str=0x0, expect_state=__rw_eof_fail) at io.cpp:414
#4  0x0000000010027d84 in test_extractor<char> (t=@0x1ffffffe3b0) at io.cpp:646
#5  0x000000001002830c in Test::runTest (this=0x1ffffffe3b0) at io.cpp:1279
#6  0x000000001003e300 in RWQETest::go (this=0x1ffffffe3b0) at rwtest.cpp:857
#7  0x00000000100233b0 in main (argc=1, argv=0x1ffffffea08) at io.cpp:1301

---------------- gdb64 of tests/stdlib/containers/bitset_io ----------------------

(gdb) run
Starting program: /build/scottz/ed9/tests/stdlib/containers/stdlib_rs/bitset_io 

Program received signal SIGSEGV, Segmentation fault.
0x00000000100b8c68 in .__cxa_get_globals_fast ()
(gdb) where
#0  0x00000000100b8c68 in .__cxa_get_globals_fast ()
#1  0x00000000100b8778 in .__cxa_end_catch ()
#2  0x000000001000f7e0 in __rw::__rw_extract_bitset<19ul, char, std::char_traits<char>
> (__strm=@0x1ffffffdf20, __x=@0x1ffffffe000)
    at bitset.cc:128
#3  0x0000000010030424 in std::operator>><char, std::char_traits<char>, 19ul>
(__strm=@0x1ffffffdf20, __x=@0x1ffffffe000) at bitset:699
#4  0x00000000100310f4 in test_error<19ul, char> (t=@0x1ffffffe390) at bitset_io.cpp:334
#5  0x000000001004b6e4 in Test::runTest (this=0x1ffffffe390) at bitset_io.cpp:379
#6  0x0000000010061a10 in RWQETest::go (this=0x1ffffffe390) at rwtest.cpp:857
#7  0x000000001004b574 in main (argc=1, argv=0x1ffffffe9e8) at bitset_io.cpp:409

---------------- gdb64 of tests/stdlib/containers/vector_modifiers ----------------------
Starting program: /build/scottz/ed9/tests/stdlib/containers/stdlib_rs/vector_modifiers 

Program received signal SIGSEGV, Segmentation fault.
0x000000001008b6c0 in .__cxa_get_globals_fast ()
(gdb) where
#0  0x000000001008b6c0 in .__cxa_get_globals_fast ()
#1  0x000000001008b1d0 in .__cxa_end_catch ()
#2  0x000000001000dcb0 in operator new (n=96) at mynew.h:160
#3  0x00000000100638f4 in __rw::__rw_allocate (nbytes=96) at memory.cpp:46
#4  0x00000000100053e0 in std::allocator<X>::allocate (this=0x1ffffffd300, __n=2) at
_allocator.h:138
#5  0x0000000010005728 in std::vector<X, std::allocator<X> >::_C_realloc (this=0x1ffffffd4a8,
__n=1) at vector.cc:80
#6  0x0000000010005950 in std::vector<X, std::allocator<X> >::reserve (this=0x1ffffffd4a8,
__n=1) at vector:549
#7  0x0000000010006a8c in std::vector<X, std::allocator<X> >::_C_insert_n (this=0x1ffffffd908,
__it=@0x1ffffffd610, __n=1, __x=@0x10101df8)
    at vector.cc:180
#8  0x0000000010008328 in std::vector<X, std::allocator<X> >::_C_insert_1 (this=0x1ffffffd908,
__it=@0x1ffffffd610, __x=@0x10101df8)
    at vector.cc:155
#9  0x0000000010008400 in std::vector<X, std::allocator<X> >::push_back (this=0x1ffffffd908,
__x=@0x10101df8) at vector:559
#10 0x0000000010008508 in std::vector<X, std::allocator<X> >::insert (this=0x1ffffffd908,
__it=0x0, __x=@0x10101df8) at vector:577
#11 0x000000001000eb8c in exception_loop<X*> (t=@0x1ffffffe390, line=672, fcall=0x101035a0
"vector().insert(end(), 97)", capchg=true, 
    vec=@0x1ffffffd908, it=@0x1ffffffd920, n=-2, x=0x10101df8, first=@0x1ffffffdca0, last=@0x1ffffffdca0,
n_copy=0x1ffffffd940, 
    n_asgn=0x1ffffffd948) at vector_modifiers.cpp:144
#12 0x0000000010015350 in test_insert<X*> (t=@0x1ffffffe390, line=672, dummy=@0x1ffffffdca0,
n=-2, seq=0x10094216 "", seqlen=0, seqcap=0, off=0, 
    ins=0x1ffffffdc98 "a", inslen=1, res=0x1009462e "a", reslen=1) at vector_modifiers.cpp:322
#13 0x000000001001b2b0 in run_test (t=@0x1ffffffe390) at vector_modifiers.cpp:672
#14 0x000000001001c46c in Test::runTest (this=0x1ffffffe390) at vector_modifiers.cpp:772
#15 0x0000000010034d80 in RWQETest::go (this=0x1ffffffe390) at rwtest.cpp:857
#16 0x0000000010014e50 in main (argc=1, argv=0x1ffffffe9e8) at vector_modifiers.cpp:785

---------------- gdb64 of tests/stdlib/iostream/istream_manip ----------------------

Starting program: /build/scottz/ed9/tests/stdlib/iostream/stdlib_rs/istream_manip 

Program received signal SIGSEGV, Segmentation fault.
0x000000001008a7e8 in .__cxa_get_globals_fast ()
(gdb) where
#0  0x000000001008a7e8 in .__cxa_get_globals_fast ()
#1  0x000000001008a2f8 in .__cxa_end_catch ()
#2  0x0000000010008dc4 in std::ws<char, std::char_traits<char> > (__strm=@0x1ffffffdc78)
at istream:511
#3  0x000000001000b9f4 in test_ws<char, std::char_traits<char> > (t=@0x1ffffffe390,
iter=88, cbuf=0x1ffffffe030 "aaa", cbuf_size=4, 
    state=__rw_goodbit, j=1, skipws=false, white=97 'a') at istream_manip.cpp:287
#4  0x000000001001b688 in test_ws<char, std::char_traits<char> > (t=@0x1ffffffe390)
at istream_manip.cpp:473
#5  0x000000001001b8f0 in Test::runTest (this=0x1ffffffe390) at istream_manip.cpp:495
#6  0x00000000100319b0 in RWQETest::go (this=0x1ffffffe390) at rwtest.cpp:857
#7  0x000000001001a5e8 in main (argc=1, argv=0x1ffffffe9e8) at istream_manip.cpp:517


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