Groups > comp.lang.java.programmer > #3088

Re: What's the deal with deadlocks

Date	2011-04-17 09:45 -0700
From	Patricia Shanahan <pats@acm.org>
Newsgroups	comp.lang.java.programmer, comp.lang.c++
Subject	Re: What's the deal with deadlocks
References	<23020668-d86c-489a-988b-7b379f34851c@j13g2000pro.googlegroups.com>
Message-ID	<X8WdnYSzI6WUhDbQnZ2dnUVZ_tednZ2d@earthlink.com> (permalink)

Cross-posted to 2 groups.

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On 4/17/2011 9:15 AM, Joe Snodgrass wrote:
>
> The general concept is simple enough, but it seems to me that you'll
> need special tools to diagnose this specific problem.  How do you get
> the debugger to look inside threads, see that they're hung, and find
> out where the problem is happening?  Do the debuggers have some
> features that I haven't heard of?  TIA.

The really difficult part is not debugging a deadlocked program. For
example, the Eclipse debugger shows the current state of each thread if
you just pause the program.

The deeper problem is avoiding deadlocks by design. You cannot make a
reliable program by depending on debugging those deadlocks that show
during test, because test can never accumulate as much time and
different combinations of circumstances as will happen during use.

Patricia

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Thread

What's the deal with deadlocks Joe Snodgrass <joe.snod@yahoo.com> - 2011-04-17 09:15 -0700
  Re: What's the deal with deadlocks markspace <-@.> - 2011-04-17 09:35 -0700
    Re: What's the deal with deadlocks Lew <noone@lewscanon.com> - 2011-04-17 13:14 -0400
  Re: What's the deal with deadlocks Patricia Shanahan <pats@acm.org> - 2011-04-17 09:45 -0700
  Re: What's the deal with deadlocks Robert Klemme <shortcutter@googlemail.com> - 2011-04-17 19:30 +0200
  Re: What's the deal with deadlocks Paavo Helde <myfirstname@osa.pri.ee> - 2011-04-17 15:35 -0500
    Re: What's the deal with deadlocks Ian Collins <ian-news@hotmail.com> - 2011-04-18 08:41 +1200
    Re: What's the deal with deadlocks Joe Snodgrass <joe.snod@yahoo.com> - 2011-04-18 11:59 -0700
      Re: What's the deal with deadlocks Lew <noone@lewscanon.com> - 2011-04-18 16:22 -0400
        Re: What's the deal with deadlocks "Alf P. Steinbach /Usenet" <alf.p.steinbach+usenet@gmail.com> - 2011-04-18 22:32 +0200
          Re: What's the deal with deadlocks Ian Collins <ian-news@hotmail.com> - 2011-04-19 09:53 +1200
            Re: What's the deal with deadlocks "Alf P. Steinbach /Usenet" <alf.p.steinbach+usenet@gmail.com> - 2011-04-19 01:21 +0200
            Re: What's the deal with deadlocks Joe Snodgrass <joe.snod@yahoo.com> - 2011-04-19 14:10 -0700
              Re: What's the deal with deadlocks Lew <noone@lewscanon.com> - 2011-04-19 23:01 -0400
                Re: What's the deal with deadlocks Joe Snodgrass <joe.snod@yahoo.com> - 2011-04-20 17:00 -0700
                Re: What's the deal with deadlocks Lew <noone@lewscanon.com> - 2011-04-21 00:29 -0400
              Re: What's the deal with deadlocks Patricia Shanahan <pats@acm.org> - 2011-04-19 21:18 -0700
        Re: What's the deal with deadlocks Tom Anderson <twic@urchin.earth.li> - 2011-04-19 00:50 +0100
  Re: What's the deal with deadlocks Roedy Green <see_website@mindprod.com.invalid> - 2011-04-17 14:01 -0700
  Re: What's the deal with deadlocks Noah Roberts <dont@email.me> - 2011-04-18 16:59 -0700

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