This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
Re: [PATCH] Warn users about mismatched PID namespaces
- From: Pedro Alves <palves at redhat dot com>
- To: Daniel Colascione <dancol at dancol dot org>, gdb-patches at sourceware dot org
- Date: Thu, 30 Oct 2014 12:49:12 +0000
- Subject: Re: [PATCH] Warn users about mismatched PID namespaces
- Authentication-results: sourceware.org; auth=none
- References: <5451AB7E dot 40709 at dancol dot org> <54522DC7 dot 2090100 at redhat dot com> <54522FE0 dot 9050508 at dancol dot org>
On 10/30/2014 12:32 PM, Daniel Colascione wrote:
> On 10/30/2014 12:23 PM, Pedro Alves wrote:
>> On 10/30/2014 03:07 AM, Daniel Colascione wrote:
>>
>>> diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
>>> index 352fac1..4089417 100644
>>> - --- a/gdb/linux-thread-db.c
>>> +++ b/gdb/linux-thread-db.c
>>> @@ -1223,6 +1223,25 @@ thread_db_new_objfile (struct objfile *objfile)
>>> static void
>>> thread_db_inferior_created (struct target_ops *target, int from_tty)
>>> {
>>> + /* If the child is in a different PID namespace, its idea of its PID
>>> + will differ from our idea of its PID. When we scan the child's
>>> + thread list, we'll mistakenly think it has no threads since the
>>> + thread PID fields won't match the PID we give to
>>> + libthread_db. */
>>
>> Why not give libthread_db the right PID then?
>
> How do you suggest find it?
Isn't it visible somewhere in /proc ?
> There's some talk on LKML of adding the necessary system call, but it's not in-tree yet.
Do you have a url handy?
Thanks,
Pedro Alves