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From: David Schultz <das@FreeBSD.org>
Date: Sun, 10 Apr 2005 02:31:24 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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Subject: cvs commit: src/sys/kern kern_sig.c
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das         2005-04-10 02:31:24 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_sig.c 
  Log:
  Suspend all other threads in the process while generating a core dump.
  The main reason for doing this is that the ELF dump handler expects
  the thread list to be fixed while the dump header is generated, so an
  upcall that occurs at the wrong time can lead to buffer overruns and
  other Bad Things.
  
  Another solution would be to grab sched_lock in the ELF dump handler,
  but we might as well single-thread, since the process is about to die.
  Furthermore, I think this should ensure that the register sets in the
  core file are sequentially consistent.
  
  Revision  Changes    Path
  1.304     +11 -1     src/sys/kern/kern_sig.c