[DragonFlyBSD - Bug #1587] can't gdb across fork

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #1587 has been updated by corecode.

File signature.asc added

It's stalloc in sh, after fork, before exec.

On 02/24/2014 02:23 PM, bugtracker-admin at leaf.dragonflybsd.org wrote:
> Issue #1587 has been updated by tuxillo.
>
> Status changed from New to Feedback
>
> Hi,
>
> This is still the case, I could reproduce it with the suggested test.
>
> Breakpoint 1, stalloc (nbytes=24) at memalloc.c:151
> 151     {
> (gdb)
> Continuing.
> Trace/BPT trap (core dumped)
>
> But I have some questions here:
> a) if the child has the breakpoint set, why is it still breaking at stalloc() ? Because If I am running 'ls' for example that function does not exist. 
> b) Are we sure this is not a gdb "feature" ?
>
> FWIW, this is also the case in FreeBSD 10.
>
> Cheers,
> Antonio Huete
>
> ----------------------------------------
> Bug #1587: can't gdb across fork
> http://bugs.dragonflybsd.org/issues/1587#change-11837
>
> * Author: corecode
> * Status: Feedback
> * Priority: Normal
> * Assignee: tuxillo
> * Category: Userland
> * Target version: 3.8.0
> ----------------------------------------
> When the debugged process performs a fork(), gdb/ptrace won't notice and 
> will not be able to remove breakpoints in the new child.  When the child 
> then hits a breakpoint, it will receive a SIGTRAP and dump core.
>
> gdb needs to be aware of forks, so that it will be able to remove the 
> breakpoints in the child.
>
> Test:  gdb sh and break stalloc.
>
>
>

----------------------------------------
Bug #1587: can't gdb across fork
http://bugs.dragonflybsd.org/issues/1587#change-11838

* Author: corecode
* Status: Feedback
* Priority: Normal
* Assignee: tuxillo
* Category: Userland
* Target version: 3.8.0
----------------------------------------
When the debugged process performs a fork(), gdb/ptrace won't notice and 
will not be able to remove breakpoints in the new child.  When the child 
then hits a breakpoint, it will receive a SIGTRAP and dump core.

gdb needs to be aware of forks, so that it will be able to remove the 
breakpoints in the child.

Test:  gdb sh and break stalloc.

---Files--------------------------------
signature.asc (901 Bytes)


-- 
You have received this notification because you have either subscribed to it, or are involved in it.
To change your notification preferences, please click here: http://bugs.dragonflybsd.org/my/account