Segmenation fault when a process resumed with checkpt exits
stanislav.syekirin at studium.fernuni-hagen.de
Sun Jun 12 04:53:15 PDT 2022
Done, thank your for helping me create an account.
The issue is here: https://bugs.dragonflybsd.org/issues/3318
On So, 12 Jun 2022 13:11:47 +0200
Antonio Huete Jimenez <tuxillo at quantumachine.net> wrote:
> Would you mind opening a bugtracker issue for this one?
> If you don't have an account you can mail me directly to get one.
> Antonio Huete
> On 12/6/22 12:02, Stanislav Syekirin wrote:
>> I'm experimenting with process checkpointing in DragonFly 6.2.1 and
>>don't know how to exit a resumed process correclty. The man page for
>>sys_checkpoint doesn't address the question, as far as I can see: the
>>example loops forever and only exits if there is an error.
>> I have the following code (error handling omitted for brevity):
>> #include <stdio.h>
>> #include <stdlib.h>
>> #include <fcntl.h>
>> #include <unistd.h>
>> #include <sys/checkpoint.h>
>> void save(const char* filename)
>> int file = open(filename, O_RDWR|O_CREAT|O_TRUNC, 0666);
>> sys_checkpoint(CKPT_FREEZE, file, -1, -1);
>> int main()
>> This is the output I get:
>> % gcc test.c -o test -Wall -Wextra
>> % ./test
>> % checkpt -r a.ckpt
>> pid 1143 (test), uid 1001: exited on signal 11 (core dumped)
>> Segmentation fault (core dumped)
>> This is the backtrace I get with gdb test test.core:
>> #0 0x000000080040400f in __tls_get_addr () from
>> #1 0x000000080075648a in _thread_finalize () from /lib/libc.so.8
>> #2 0x0000000800756449 in exit () from /lib/libc.so.8
>> #3 0x00000000004007b3 in _start ()
>> Help would be appreciated.
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