Thank you. Yes, that makes sense. I see the macro check above. Thanks.

Cheers,
Paul

On Tue, Jun 28, 2016 at 10:25 AM, Mandy Chung <mandy.ch...@oracle.com>
wrote:

> When it reaches the if (dryRun) case, it already loads the VM and main
> class successfully with no exception.  Hence it sets ret = 0.
>
> If there is any exception thrown during the course, CHECK_EXCEPTION_LEAVE
> or CHECK_EXCEPTION_NULL_LEAVE macros reports the exception and exit with
> ret=1.
>
>
> $ java -addmods abc --dry-run -cp hi.jar Hi
> Error occurred during initialization of VM
> java.lang.module.ResolutionException: Module abc not found
>         at java.lang.module.Resolver.fail(java.base/Resolver.java:790)
>         at
> java.lang.module.Resolver.resolveRequires(java.base/Resolver.java:94)
>         at
> java.lang.module.Configuration.resolveRequiresAndUses(java.base/Configuration.java:370)
>         at
> java.lang.module.ModuleDescriptor$1.resolveRequiresAndUses(java.base/ModuleDescriptor.java:1986)
>         at
> jdk.internal.module.ModuleBootstrap.boot(java.base/ModuleBootstrap.java:263)
>         at java.lang.System.initPhase2(java.base/System.java:1928)
>
> $ echo $?
> 1
>
>
> > On Jun 28, 2016, at 8:18 AM, Paul Benedict <pbened...@apache.org> wrote:
> >
> > Mandy, if I am reading the diff correctly, it looks like you moved the
> error exit code (1 = unhandled exception) inside the "else" block for a
> real run only? I think if the dry run also throws an exception, you should
> set the exit code to 1. If I read the diff wrong, my apologies :-)
> >
> > Cheers,
> > Paul
> >
> > On Mon, Jun 27, 2016 at 12:36 PM, Mandy Chung <mandy.ch...@oracle.com>
> wrote:
> > -XshowSettings would probably be a good place to include the VM
> arguments.
> > $ java -XshowSettings:vm -—dry-run
> >
> > I file a JBS issue:
> >   https://bugs.openjdk.java.net/browse/JDK-8160389
> >
> > Mandy
> >
> >
> > > On Jun 27, 2016, at 9:20 AM, Paul Benedict <pbened...@apache.org>
> wrote:
> > >
> > > Mandy, if I may recommend another suggestion, another "sanity" check
> could be dumping the command line arguments. I know quite a few bash
> programmers who would really love to see they passed their arguments
> correctly without executing their program. :-)
> > >
> > > Cheers,
> > > Paul
> > >
> > > On Mon, Jun 27, 2016 at 10:48 AM, Raymond Gallardo <
> raymond.galla...@oracle.com> wrote:
> > > Hi Mandy,
> > >
> > > Does this enhancement need to be doc'd? If so, could you add a subtask
> (component = docs)?
> > >
> > > Thanks,
> > > --Raymond
> > >
> > > On 24/06/2016 9:49 AM, Mandy Chung wrote:
> > > Webrev:
> > >    http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8159596/webrev.00/
> > >
> > > `java --dry-run` will create the VM, load the main, locate the static
> void main method, and exit (with 0) instead of executing the method.  As
> all module options are processed and the boot layer is created, this would
> be useful to sanity check the options and detect possible issues.
> > >
> > > Mandy
> > >
> > >
> > >
> >
> >
>
>

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