[Dmtcp-forum] Checkpoint problem with mtcp and test program testmtcp2

[Frederic B. <fre...@ya...>]

Hello all,

I hope my question won't be out of scope... I'm evaluating the mtcp module
(no need to checkpoint distributed processes for the time being) and I have
an execution error with the basic example provided : testmtcp2.c

To search for the stupid thing I might have done, I've simplified this file.
I'm starting only 1 thread and wait 5 seconds before doing a checkpoint.

The problem I encounter at checkpoint time is that "tgkill" function called
to stop threads before the checkpoint returns -1 with errno set to ESRCH for
the 2nd thread (not the main task). I do not understand how it can happen
as the thread exists and is running (and still runs after checkpoint).
Did I miss a limitation ? (I'm really not fluent in assembly, I can't give
you more details about INLINE_SYSCALL behavior).

My configuration :
  Redhat 6.2 (32b)
  gcc version 4.4.6

Thanks,
Fred