That's a good point. The application runs fine on its own though. It is
just when run inside Valgrind that there is a problem.
On Wed, Feb 7, 2018 at 3:29 PM, Tom Hughes <t...@compton.nu> wrote:
> 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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>
> --
> Tom Hughes (t...@compton.nu)
> http://compton.nu/
>
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