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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 08:58:25 GMT
Both DRLVM and J9 works for me (SUSE9).

--
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 vfork has become outdated since it main usage is supplied by fork with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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