On 8/12/19 5:13 PM, Frederic Parain wrote:
This looks good to me, with two comments:

I don’t like the static final RETAIN_CLASS_REF for the same
reasons as Aleksey, but I can live with that.

I didn't see Aleksey's comment about RETAIN_CLASS_REF (what is it?).  Now that it draws my attention.   Since there is no other flag at the moment, we can simplify it and rename the flags field to a boolean retainClassRef field.

The protocol between the JVM and the Java class is well explained
on the JVM side (javaClasses.cpp:4227). I think it would be valuable
to provide the same description on the Java side, the comment in
StackFrameInfo.java:42 describes only part of the protocol.

Good suggestion.  Added:

96 // VM adds 1 to the code index to StackFrameInfo::bci field such that
97 // zero (and negative values) indicates invalid BCI. So substract 1.


http://cr.openjdk.java.net/~mchung/jdk14/8193325/webrev.04/

Mandy

No need for another review from me.

Regards,

Fred
On Aug 12, 2019, at 16:24, Mandy Chung <mandy.ch...@oracle.com> wrote:

Having a second thought, I'm keeping @Stable bci field while zero indicates an 
invalid BCI that makes it obvious that this field will be updated.  VM will set 
StackFrameInfo::bci to value+1.

http://cr.openjdk.java.net/~mchung/jdk14/8193325/webrev.03/

Mandy

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