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2 definitions found
 for DEADBEEF
From The Jargon File (version 4.4.7, 29 Dec 2003) :

  DEADBEEF
   /ded?beef/, n.
  
      The hexadecimal word-fill pattern for freshly allocated memory under a
      number of IBM environments, including the RS/6000. Some modern debugging
      tools deliberately fill freed memory with this value as a way of converting
      heisenbugs into Bohr bugs. As in ?Your program is DEADBEEF? (meaning
      gone, aborted, flushed from memory); if you start from an odd half-word
      boundary, of course, you have BEEFDEAD. See also the anecdote under fool
      and dead beef attack.
  

From The Free On-line Dictionary of Computing (30 December 2018) :

  DEADBEEF
  
      /ded-beef/ The hexadecimal pattern
     used to fill words of freshly allocated memory under a number
     of IBM environments including the RS/6000; equal to
     decimal 3,735,928,559 (unsigned) or -559,038,737 (32-bit
     signed).  As in "Your program is DEADBEEF" (meaning gone,
     aborted, flushed from memory).
  
     (1998-06-29)
  

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