Failed to -XX:+UseZGC (SIGSEGV error)

[Aleksey Shipilev]

On 03/01/2018 02:55 AM, Wenyu Zhao wrote:
> # Problematic frame: # V PhaseChaitin::gather_lrg_masks(bool)+0x14d 

This looks like a C2 bug, maybe caused by ZGC code shape, which might explain why G1 works. Running
with fastdebug build (./configure --with-debug-level=fastdebug) would probably meaningfully assert.
After that, you can look at bugs.openjdk.java.net for the similar failures.

You may want to try these fastdebug/slowdebug nightly builds and see if issue reproduces there too
(this makes local native compiler bugs less likely):
  https://builds.shipilev.net/openjdk-zgc/

> PS: Error logs are attached below.

Unfortunately, attachments are stripped from many OpenJDK lists.

-Aleksey