RFR 8158237: JVMTI hides critical debug information for memory leak tracing

[serguei.spitsyn at oracle.com]

Coleen,

It looks good.

test/com/sun/jdi/BacktraceFieldTest.java:

    Nit: seems to be unneeded leftover:

71 //

Thanks, Serguei On 6/10/16 11:27, Coleen Phillimore wrote:
> Summary: remove _backtrace as hidden field, since the original problem 
> no longer exists The backtrace format is changed to be all java 
> objects and no longer have jvm methodOops (pseudo Objects) which 
> caused the crash. This change is being also tested by the customer.  I 
> ran full nightly tests on this. bug link 
> https://bugs.openjdk.java.net/browse/JDK-8158237 open webrev at 
> http://cr.openjdk.java.net/~coleenp/8158237.01/webrev open webrev at 
> http://cr.openjdk.java.net/~coleenp/8158237.jdk.01/webrev Thanks, Coleen