AllocationRequiringGC stacktrace precision

[Milan Mimica]

Hello List

I've been using JFR Java API to track allocations that are of
interests to me. I'm focused on large allocations that trigger
AllocationRequiringGC event. I came across this event I can't explain:

This is the top of the stack trace
(jdk.jfr.consumer.RecordedStackTrace#getFrames):
at java.lang.Integer#valueOf line: 1050

and jdk.jfr.consumer.RecordedObject#getValue("size") says it allocated
about 8MB.

Happened using version 11.0.3, with G1.
This makes me wonder how reliable the stack-traces that come with
events are? I've been looking at hotspot code and I would say that the
java thread is blocked while waiting for allocation and it's safe to
take a snapshot of its stack. I'm I missing something?


-- 
Milan Mimica