Review Request JDK-8181443: Replace usages of jdk.internal.misc.Unsafe with MethodHandles.Lookup.defineClass

[Erik Gahlin]

JFR changes looks good.

Erik

> On 3 Oct 2018, at 19:56, Mandy Chung <mandy.chung at oracle.com> wrote:
> 
> This patch replaces java.lang.invoke and JFR use of
> jdk.internal.misc.Unsafe::defineClass with Lookup::defineClass.
> It also replaces dynamic proxy and reflection implementation to
> use the shared secret to invoke ClassLoader::defineClass.
> 
> Webrev:
> http://cr.openjdk.java.net/~mchung/jdk12/webrevs/8181443/webrev.00
> 
> With this change, JDK no longer uses Unsafe::defineClass.
> Any opinion in removing Unsafe::defineClass support?
> 
> I ran jdk_core, jdk_jfr, tier1_runtime and tier1_compiler tests.
> 
> thanks
> Mandy
> 
> 
>