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 and 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 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) > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Valgrind-users mailing list > Valgrind-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/valgrind-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
