Review request: 8000230: Change os::print_location to be more descriptive when a location is pointing into an object

[Christian Thalinger]

On Sep 28, 2012, at 6:49 AM, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:

> http://cr.openjdk.java.net/~stefank/8000230/webrev/
> 
> From the bug:
> ---
> When printing the "Register to memory mapping:" hs_err section, it's easy to get fooled when a register points into an object.
> 
> For example:
> R13=0xfffffd7fcf900064 is an oop
> [Ljava.lang.Object;
> - klass: 'java/lang/Object'[]
> - length: 327680
> 
> seems to indicate that an object starts at address 0xfffffd7fcf900064. In this case the real object start was at address 0xfffffd7fcf900000.
> 
> I propose that we change this line to:
> R13=0xfffffd7fcf900064 is pointing into object: 0xfffffd7fcf900000
> [Ljava.lang.Object;
> - klass: 'java/lang/Object'[]
> - length: 327680
> 
> If the address seems to be pointing at the start of an object, the old output can still be used.

Yes, that's helpful.  Thanks.  Looks good.  -- Chris

> ---
> 
> StefanK