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From "Alexey Varlamov" <alexey.v.varla...@gmail.com>
Subject Re: [classlib][luni]Runtime.exec fails on Linux
Date Mon, 16 Oct 2006 09:39:53 GMT
2006/10/16, Spark Shen <smallsmallorgan@gmail.com>:
> Alexey Varlamov 写道:
> > Both DRLVM and J9 works for me (SUSE9).
> Not sure whether SUSE9 env. is identical to our RedHat Enterprise 4 and
> Unbuntu.
> BTW, is there off-the-peg DRLVM for download on popular platform?

Other than JRE snapshots, no.

>
> Best regards
> >
> > --
> > Alexey
> >
> > 2006/10/16, Leo Li <liyilei1979@gmail.com>:
> >> Hi, all:
> >> The harmony Runtime.exec fails on Linux with ENOMEM.
> >> Here is the testcase:
> >>
> >> public class Exec {
> >> public static void main(String[] args) throws Exception {
> >>
> >> Runtime.getRuntime().exec("ls"); }
> >> }
> >>
> >> I have tried it on RedHat Enterprise 4 and Unbuntu, both get ENOMEM in
> >> native code.
> >>
> >> After digging into it, I found it fails in procimpl.c, line 135:
> >>
> >> grdpid = fork ();
> >>
> >> If the call to fork is changed to vfork, the testcase will pass but
> >> still get exitcode = 1 which indicates that some error has happened. The
> >> difference between fork and vfork is just whether page tables is
> >> copied to
> >> child process or not. But I do not think it is the main cause. Besides,
> >> vfork has become outdated since it main usage is supplied by fork with
> >> copy-on-write function implemented in modern linux kernel. Furthermore,
> >> vfork is also not so safe as fork. So I do not think it is the
> >> accepted way
> >> to solve the problem.
> >>
> >> I will try whether it can be reproduced on drlvm of linux since I am not
> >> sure whether it is relevent to VM or classlib. If any drlvm man can
> >> tell me
> >> the result, it can avoid my trouble to build it on linux. :)
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Leo Li
> >> China Software Development Lab, IBM
> >>
> >>
> >
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> >
>
>
> --
> Spark Shen
> China Software Development Lab, IBM
>
>
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>

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