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Date: Fri, 10 Oct 2003 22:34:36 +0200
From: thomas <tom AT huno DOT net>
Reply-To: thomas <tom AT huno DOT net>
X-Priority: 3 (Normal)
Message-ID: <9525451343.20031010223436@huno.net>
To: Cygwin AT cygwin DOT com
Subject: std::ofstream causes segfault in 1.5.x
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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Hi,

here is a simplified snippet from code that worked perfectly in a 1.3.x
environment, but doesn't work with 1.5.5 (i tried >1.5.2).

******************************************
 std::ofstream out("foo.toc");
 toc->print(out);  // <- segfault here

 ...
 
 void Toc::print(std::ostream &out) const
 {
   out << "CD_ROM";
 }
******************************************

Strace shows the following:

   20 7293891 [main] cdrdao 1576 fstat64: 0 = fstat (3, 0x22F9E4)
   28 7293919 [main] cdrdao 1576 mmap64: addr 0, len 1065811968, prot 3, flags 22, fd -1, off 0
  982 7294901 [main] cdrdao 1576 seterrno_from_win_error: /netrel/src/cygwin-1.5.5-1/winsup/cygwin/mmap.cc:920 windows error 1455
   85 7294986 [main] cdrdao 1576 geterrno_from_win_error: unknown windows error 1455, setting errno to 13
   23 7295009 [main] cdrdao 1576 fhandler_disk_file::mmap: -1 = mmap(): CreateFileMapping failed with Win32 error 1455
   43 7295052 [main] cdrdao 1576 mmap64: addr 0, len 1065816064, prot 3, flags 22, fd -1, off 0
  646 7295698 [main] cdrdao 1576 seterrno_from_win_error: /netrel/src/cygwin-1.5.5-1/winsup/cygwin/mmap.cc:920 windows error 1455
   52 7295750 [main] cdrdao 1576 geterrno_from_win_error: unknown windows error 1455, setting errno to 13
   20 7295770 [main] cdrdao 1576 fhandler_disk_file::mmap: -1 = mmap(): CreateFileMapping failed with Win32 error 1455
   80 7295850 [main] cdrdao 1576 handle_exceptions: In cygwin_except_handler exc 0xC0000005 at 0x28FA6AE0 sp 0x22FA2C
   18 7295868 [main] cdrdao 1576 handle_exceptions: In cygwin_except_handler sig = 11 at 0x28FA6AE0
   18 7295886 [main] cdrdao 1576 handle_exceptions: In cygwin_except_handler calling 0x0
   18 7295904 [main] cdrdao 1576 handle_exceptions: Exception: STATUS_ACCESS_VIOLATION


If further testing needs to be done i'm available.

Thanks,
Thomas


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