[STDCXX-808] [Sun C++ -m64] SIGBUS in strstreambuf::seekoff() on empty stream

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 4.2.0
• Fix Version/s: 4.2.2
• Component/s: 27. Input/Output
• Regression: Regression
• Severity: Runtime Error
• Assignee: Eric Lemings
• Reporter: Martin Sebor
• Created: 30/Mar/08 20:32
• Updated: 21/Jul/08 17:01
• Resolved: 21/Jul/08 17:01

Description

When compiled with Sun C++ in wide mode (with the -m64 option) the following program (taken from the Rogue Wave regression test test_bug11205.cpp) abends with SIGBUS. This happens in both 4.2.0 and on the head of trunk. Suspect a compiler bug.

$ cat t.cpp && gmake t && dbx -q -c"run;where" t
#include <cassert>
#include <iosfwd>
#include <strstream>

int main ()
{
    std::strstreambuf sb;

    std::streampos pos = sb.pubseekoff (10, std::ios::beg, std::ios::in);

    assert (-1 == pos);
}
CC -library=%none -g  -m64 +w -errtags -erroff=hidef  -D_RWSTDDEBUG   -mt -I/amd/devco/sebor/stdcxx/include -I/build/sebor/stdcxx-suncc-5.9_j1-15D/include -I/amd/devco/sebor/stdcxx/examples/include  -library=%none  -mt  -m64 -L/build/sebor/stdcxx-suncc-5.9_j1-15D/lib  -R/build/sebor/stdcxx-suncc-5.9_j1-15D/lib  t.cpp  -lstd15D  -lm -o t
Running: t 
(process id 20476)
t@1 (l@1) signal BUS (invalid address alignment) in std::basic_streambuf<char,std::char_traits<char> >::eback at line 166 in file "streambuf"
  166           return _C_eback;
current thread: t@1
=>[1] std::basic_streambuf<char,std::char_traits<char> >::eback(this = 0xa), line 166 in "streambuf"
  [2] std::basic_streambuf<char,std::char_traits<char> >::_C_is_valid(this = 0xa), line 520 in "streambuf"
  [3] std::strstreambuf::seekoff(this = 0xa, off = 0, way = 4, which = 0), line 166 in "strstream.cpp"
  [4] std::basic_streambuf<char,std::char_traits<char> >::pubseekoff(this = 0xffffffff7ffff850, __off = 10, __way = __rw_beg, __which = __rw_in), line 99 in "streambuf"
  [5] main(), line 9 in "t.cpp"