Re: Application (GC) stuck in "_Jv_MarkArray" when doing "klass->getName();"

[Hans Boehm <Hans dot Boehm at hp dot com>]

I haven't checked, but I'd be suspicious that getName allocates memory,
which acquires the GC lock, which is already held by the same thread.
(This is a non-reentrant lock.  Which is good, because things would
fail in more complex ways if it weren't.)

Hans

On Sat, 18 Mar 2006, Martin Egholm Nielsen wrote:

> Hi there,
>
> In my long and tiresome (for the rest of you) attempts to understand the
> doubling of my GC-times, I've now added some output to "_Jv_MarkArray"
> to get an idea of what and why there is suddenly an array given of
> length 170.000.
> (This attempt is a consequence of calling "gcj_describe_type_fn" from
> the GC, but it just halted.)
> So I added parts of the the code from "gcj_describe_type_fn" into
> _Jv_MarkArray:
>
>    if ( klass ) {
>        printf( "MEN: 1\n" );
>        jstring name = klass -> getName();
>        printf( "MEN: 2\n" );
>    } // if
>
> However, when the GC gets to it, "1" is printed, "2" is not, and the GC
> is stuck in between.
> Anyone can tell me why this is not "allowed"/fails?
>
> BR,
>   Martin Egholm
>
>