checkpointing dumps core

[Michael Neumann]

Matthew Dillon wrote:
:Hi,
:
:I tried checkpointing a simple program, but without success.
:I am using the latest stable DragonFly from 15 November 2004.
:
:The program, I tried, was:
:
:   int main(int argc, char** argv) {
:     int i = 0;
:     while (1==1) {
:       printf("iteration: %d\n", i);
:       i += 1;
:      }
:   }
:
:But it dumps core when I try to run the checkpoint (creating the 
:checkpoint works).
:
:Any hints?
:
:Regards,
:
:   Michael
 
    That's odd.  It seems to work for me.  I tried it on both stable and
    HEAD.  Make sure that stty -a reports the check point key as being ^E
    (ckpt in the cchars section) and that you have loaded the checkpoint 
    module.


Yes, ckpt is ^E in stty -a.

I restart the checkpoint with:

  checkpt -r test.ckpt

This gives me on the console:

headers section:
entry type:   4
file offset:  340
virt address: 0
file size:    448
memory size:  0
entry type:   1
file offset:  4096
virt address: 0x8049000
file size:    4096
memory size:  4096
entry type:   1
file offset:  8192
virt address: 0x804a000
file size:    8192
memory size:  8192
entry type:   1
file offset:  16384
virt address: 0x2805b000
file size:    4096
memory size:  4096
entry type:   1
file offset:  20480
virt address: 0x2805c000
file size:    12288
memory size:  12288
entry type:   1
file offset:  32768
virt address: 0x2805f000
file size:    32768
memory size:  32768
entry type:   1
file offset:  65536
virt address: 0x280e8000
file size:    20480
memory size:  20480
entry type:   1
file offset:  86016
virt address: 0x280ed000
file size:    77824
memory size:  77824
entry type:   1
file offset:  163840
virt address: 0xbfbe0000
file size:    131072
memory size:  131072
and then checkpt dumps core (segmentation fault).

BTW, "checkpt" should print "checkpt -r file.ckpt" instead of "checkpt 
file.ckpt", shouldn't it?

Regards,

  Michael