[jira] [Assigned] (MESOS-4577) libprocess can not run on 16-byte aligned stack mandatory architecture(aarch64 ppc64)

["AndyPang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

AndyPang reassigned MESOS-4577:
-------------------------------

    Assignee: AndyPang

> libprocess can not run on 16-byte aligned stack mandatory architecture(aarch64 ppc64) 
> --------------------------------------------------------------------------------------
>
>                 Key: MESOS-4577
>                 URL: https://issues.apache.org/jira/browse/MESOS-4577
>             Project: Mesos
>          Issue Type: Bug
>          Components: containerization, libprocess, stout
>         Environment: Linux 10-175-112-202 4.1.6-rc3.aarch64 #1 SMP Mon Oct 12 01:43:03 UTC 2015 aarch64 aarch64 aarch64 GNU/Linux
>            Reporter: AndyPang
>            Assignee: AndyPang
>              Labels: mesosphere
>
> libprocess 3rdparty stout library(in linux.hpp) packaging a syscall "clone" :
> {code:title=clone|borderStyle=solid}
> inline pid_t clone(const lambda::function<int()>& func, int flags)
> {
>   // Stack for the child.
>   // - unsigned long long used for best alignment.
>   // - 8 MiB appears to be the default for "ulimit -s" on OSX and Linux.
>   //
>   // NOTE: We need to allocate the stack dynamically. This is because
>   // glibc's 'clone' will modify the stack passed to it, therefore the
>   // stack must NOT be shared as multiple 'clone's can be invoked
>   // simultaneously.
>   int stackSize = 8 * 1024 * 1024;
>   unsigned long long *stack =
>     new unsigned long long[stackSize/sizeof(unsigned long long)];
>   pid_t pid = ::clone(
>       childMain,
>       &stack[stackSize/sizeof(stack[0]) - 1],  // stack grows down.
>       flags,
>       (void*) &func);
>   // If CLONE_VM is not set, ::clone would create a process which runs in a
>   // separate copy of the memory space of the calling process. So we destroy the
>   // stack here to avoid memory leak. If CLONE_VM is set, ::clone would create a
>   // thread which runs in the same memory space with the calling process.
>   if (!(flags & CLONE_VM)) {
>     delete[] stack;
>   }
>   return pid;
> }
> {code}
> syscal "clone" parameter stack is 8-byte aligned,so if in 16-byte aligned stack mandatory architecture(aarch64 ppc64) it will get error.



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