RFR: 8268780: Use 'print_cr' instead of 'print' for the message 'eliminated <owner is scalar replaced>'

[Chris Plummer]

On Tue, 15 Jun 2021 17:19:26 GMT, Denghui Dong <ddong at openjdk.org> wrote:

> Hi,
> 
> Cound I have a review of this small fix that adds a line feed for the message 'eliminated <owner is scalar replaced>'.
> 
> When we run the following code and run `jstack <pid>`
> 
> 
>     public static void main(String[] args) {
>         for (int i = 0; i < 200000000; i++) {
>             try {
>                 test();
>             } catch (Exception e) {
>             }
>         }
>     }
> 
>     private static void test() throws Exception {
>         Object obj = new Object();
>         synchronized (obj) {
>             throw new Exception();
>         }
>     }
> 
> 
> We could find that a frame that does not wrap properly.
> 
> "main" #1 prio=5 os_prio=0 cpu=53202.88ms elapsed=54.10s tid=0x00007f8c2c022550 nid=0x4743 runnable  [0x00007f8c35ac2000]
>    java.lang.Thread.State: RUNNABLE
>         at java.lang.Throwable.fillInStackTrace(java.base at 17-internal/Native Method)
>         at java.lang.Throwable.fillInStackTrace(java.base at 17-internal/Throwable.java:798)
>         - locked <0x00000000f3b00340> (a java.lang.Exception)
>         at java.lang.Throwable.<init>(java.base at 17-internal/Throwable.java:256)
>         at java.lang.Exception.<init>(java.base at 17-internal/Exception.java:55)
>         at Test.test(Test.java:14)
>         - eliminated <owner is scalar replaced> (a java.lang.Object)    at Test.main(Test.java:5)
> 
> 
> Also, I noticed that this message has a correct line feed in the implementation of JavaVFrame.java.

Marked as reviewed by cjplummer (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/4495