If I'm reading that right it is coming from the breakpad exception
handler which I can well believe is using clone with some odd flag set
to do some crazy stuff.
Of course if you've got there then the process is already dead anyway so
I'm not sure how much it matters?
Tom
On 07/02/18 21:25, Adam Scott wrote:
Even with the patches from that bug the error still occurred.
On Wed, Feb 7, 2018 at 3:16 PM, Adam Scott <adamjs....@gmail.com
<mailto:adamjs....@gmail.com>> wrote:
I am using the latest version 3.13. I will pull down that patch and
try it out.
On Wed, Feb 7, 2018 at 3:03 PM, Philippe Waroquiers
<philippe.waroqui...@skynet.be
<mailto:philippe.waroqui...@skynet.be>> wrote:
Which version are you using ?
Some improvements to clone handling was done in 3.13 :
* On Linux, clone handling has been improved to honour
CLONE_VFORK that
involves a child stack. Note however that CLONE_VFORK |
CLONE_VM is handled
like CLONE_VFORK (by removing CLONE_VM), so applications that
depend on
CLONE_VM exact semantics will (still) not work.
Otherwise, I am sure we have still a bunch of clone related bugs
opened. E.g. https://bugs.kde.org/show_bug.cgi?id=183406
<https://bugs.kde.org/show_bug.cgi?id=183406>
and https://bugs.kde.org/show_bug.cgi?id=386427
<https://bugs.kde.org/show_bug.cgi?id=386427> which has
a patch, and might be what you have encountered.
Philippe
On Wed, 2018-02-07 at 14:51 -0600, Adam Scott wrote:
> I'm hoping someone else has seen this issue and is able to
help me. I have search all over the internet for a solution and
haven't been able to find one. I am trying to run Valgrind on
armv7 architecture, and after compiling Valgrind and getting it
onto the target I am able to run Valgrind successfully on 'ls
-l' but when I run Valgrind on my executable it starts and then
always fails after printing out this error:
>
> ==2333== Unsupported clone() flags: 0x800600
> ==2333==
> ==2333== The only supported clone() uses are:
> ==2333== - via a threads library (LinuxThreads or NPTL)
> ==2333== - via the implementation of fork or vfork
> ==2333==
> ==2333== Valgrind detected that your program requires
> ==2333== the following unimplemented functionality:
> ==2333== Valgrind does not support general clone().
> ==2333== This may be because the functionality is hard to
implement,
> ==2333== or because no reasonable program would behave this way,
> ==2333== or because nobody has yet needed it. In any case,
let us know at
> ==2333== www.valgrind.org <http://www.valgrind.org> and/or
try to work around the problem, if you can.
> ==2333==
> ==2333== Valgrind has to exit now. Sorry. Bye!
> ==2333==
>
> sched status:
> running_tid=9
>
> The thread that has the crash has the following stack:
> Thread 9: status = VgTs_Runnable (lwpid 2354)
> ==2333== at 0x6C5BCC: sys_clone (linux_syscall_support.h:2666)
> ==2333== by 0x6C5BCC:
google_breakpad::ExceptionHandler::GenerateDump(google_breakpad::ExceptionHandler::CrashContext*)
(exception_handler.cc:527)
> ==2333== by 0x6C60C3:
google_breakpad::ExceptionHandler::SignalHandler(int,
siginfo_t*, void*) (exception_handler.cc:368)
> ==2333== by 0x4CE5ACF: ??? (in /lib/libc-2.22.so
<http://libc-2.22.so>)
>
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