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  1. C++ Standard Library
  2. STDCXX-196

[XLC++ 8.0/SLES 9.2] SIGSEGV in .__cxa_get_globals_fast throwing an exception

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 4.1.3
    • Fix Version/s: 4.3.0
    • Labels:
      None
    • Environment:

      SuSE SLES 9sp2 (ppc64), IBM XL C/C++ Advanced Edition V8.0 for Linux
      Version: 08.00.0000.0000

    • Severity:
      Runtime Error

      Description

      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 libsupc++ 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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              • Assignee:
                Unassigned
                Reporter:
                scottz Scott (Yu) Zhong

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                  Updated:

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