[Boost-bugs] [Boost C++ Libraries] #3592: under_debugger() goes into infinite loop

Subject: [Boost-bugs] [Boost C++ Libraries] #3592: under_debugger() goes into infinite loop
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-11-05 14:49:00

#3592: under_debugger() goes into infinite loop
----------------------------------------+-----------------------------------
 Reporter:  a.sanders@…                 |       Owner:  rogeeff
     Type:  Bugs                        |      Status:  new    
Milestone:  Boost 1.41.0                |   Component:  test   
  Version:  Boost 1.40.0                |    Severity:  Problem
 Keywords:                              |  
----------------------------------------+-----------------------------------
 In the under_debugger() function in debug.ipp there is the following loop:

 -------------------------------------------
     pid_t pid = ::getpid();

     while( pid != 0 ) {
         process_info pi( pid );

         // !! ?? should we use tokenizer here instead?
         if( dbg_list.find( pi.binary_name() ) != const_string::npos )
             return true;

         pid = pi.parent_pid();
     }
 ---------------------------------------

 The loop assumes it will eventually find a process who's parent
 process id is zero. On our Solaris 10 systems (which is under Cluster
 control) it eventually ends up at the zsched process who's parent pid is
 the same as it's own pid. And so the loop never terminates.

 $ ps -ef | grep zsched
     root  2487  2487   0   Oct 13 ?           0:00 zsched

 Output from running the Test executable under truss shows how it keeps
 looping round on pid 2487.

 If I run the Test executable from within gdb, then it runs okay and
 under_debugger() doesn't go into an infinite loop.

 Output from truss is attached.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3592>
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