On Tue, 13 Sep 2005, Steven J. Hill wrote:
You might want to first make sure that your program has no memory
access errors. You could try building it for x86 and debugging
with valgrind, to see if that catches anything.
A good idea. I built it for x86. Unfortunately, from the output it
appears that 'clone' is not supported, or rather not very well. Here
is a link to the source:
http://www.uclibc.org/cgi-bin/viewcvs.cgi/*checkout*/trunk/uClibc/test/unistd/clone.c?content-type=text%2Fplain&rev=10696
The only interesting output is:
==4032== Syscall param clone(parent_tidptr) contains uninitialised byte(s)
==4032== at 0x1BA108AC: clone (clone.S:100)
==4032== by 0x1B96C412: __libc_start_main (libc-start.c:250)
==4032== by 0x80484A0: ??? (start.S:119)
==4032==
==4032== Syscall param clone(tlsinfo) contains uninitialised byte(s)
==4032== at 0x1BA108AC: clone (clone.S:100)
==4032== by 0x1B96C412: __libc_start_main (libc-start.c:250)
==4032== by 0x80484A0: ??? (start.S:119)
==4032==
==4032== Syscall param clone(child_tidptr) contains uninitialised byte(s)
==4032== at 0x1BA108AC: clone (clone.S:100)
==4032== by 0x1B96C412: __libc_start_main (libc-start.c:250)
==4032== by 0x80484A0: ??? (start.S:119)
==4032==
==4032== Unsupported clone() flags: 0x0
==4032==
==4032== The only supported clone() uses are:
==4032== - via a threads library (LinuxThreads or NPTL)
==4032== - via the implementation of fork or vfork
==4032== - for the Quadrics Elan3 user-space driver
I don't feel like I can trust the output since valgrind admitted it does
not do clone very well.
It handles the most common invocations of clone, but this program passes
in 0 for 'flags', which seems odd.
Nick
