RFR: 8277102: Dubious PrintCompilation output

[Doug Simon]

On Mon, 15 Nov 2021 11:09:35 GMT, Yi Yang <yyang at openjdk.org> wrote:

> The output of PrintCompilation is ill-formed:
> 
> 
>      22 1 3 java.lang.Object::<init> (1 bytes)
>      25 2 3 java.lang.String::hashCode (60 bytes)
>      25 3 3 java.lang.String::coder (15 bytes)
>      27 4 3 Reduced::foo (12 bytes)
>      27 5 3 java.lang.Boolean::valueOf (14 bytes)
>      27 6 3 java.lang.Boolean::hashCode (8 bytes)
>      27 8 4 Reduced::foo (12 bytes)
>      27 7 2 java.lang.Boolean::hashCode (14 bytes)
>    4 3 Reduced::foo (12 bytes) made not entrant
>      29 9 % 3 Reduced::main @ 4 (33 bytes)
>      29 10 3 Reduced::main (33 bytes)
>      29 11 % 4 Reduced::main @ 4 (33 bytes)
>    9 % 3 Reduced::main @ 4 (33 bytes) made not entrant
>   11 % 4 Reduced::main @ 4 (33 bytes) made not entrant
> 
> 
> This seems related to [JDK-8272586](https://bugs.openjdk.java.net/browse/JDK-8272586), which print timestamp optionally. As #5446 mentioned, printing timestamp would break DisassembleCodeBlobTest.java since it expects disassembling a given nmethod twice to produce the same result. Maybe we should fix DisassembleCodeBlobTest.java.

Marked as reviewed by dnsimon (Committer).

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PR: https://git.openjdk.java.net/jdk/pull/6386