[M3devel] Control-c tends to hang?

[Jay K]

I upgraded to Debian 5.0 to fix the debugging, and now I haven't been able to get the hang to occur.

 

 - Jay

 


From: jay.krell at cornell.edu
To: m3devel at elegosoft.com
Subject: Control-c tends to hang?
Date: Sun, 11 Apr 2010 14:30:44 +0000



I'm seeing that pressing control-C has a very high propensity to hang.
e.g.
 release branch, LINUXLIBC6, pthreads
 cd m3-libs/m3core
 rm -rf LINUXLIBC6
 /cm3/bin/cm3
 wait for it to print a file or two
 control-C
 if it doesn't hang, again:
   /cm3/bin/cm3
   wait a second
   control-c
 It hangs about 25% of the time.
 

 gdb is generally useless..I find that true generally lately:
Failed to read a valid object file image from memory.
(gdb) thread apply all bt
Thread 1 (Thread -1210542400 (LWP 4640)):
#0  0xb7eff410 in ?? ()
#1  0xbfd35868 in ?? ()
#2  0x00000002 in ?? ()
#3  0x00000000 in ?? ()
#0  0xb7eff410 in ?? ()
 

maybe to do with.. strace gdb:
open("/proc/5688/mem", O_RDONLY|O_LARGEFILE) = 6
pread64(6, 0xbfcd1d78, 52, 4294959104)  = -1 EIO (Input/output error)
close(6)                                = 0
ptrace(PTRACE_PEEKTEXT, 5688, 0xffffe000, [0]) = -1 EIO (Input/output error)
rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
write(2, "Failed to read a valid object fi"..., 53Failed to read a valid object
file image from memory.) = 53
 

Aha I thought I was running Debian 5.0, but only 4.0..maybe with a newer Debian/gdb.
(There was a known problem in older kernels with this signature, I didn't realize I was running old..)
 

 - Jay





 		 	   		  
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