RFR: 8275729: Qualified method names in CodeHeap Analytics

[Evgeny Astigeevich]

On Tue, 2 Nov 2021 22:57:23 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Yes, I am currently testing similar fix:
> 
> ```
> -            Klass* klass = method->method_holder();
> -            assert(klass->is_loader_alive(), "must be alive");
> +            Klass* methHolder = method->method_holder();
> +            const char*    methHolderS  = (methHolder  == NULL) ? NULL : methHolder->external_name();
> +            methHolderS = (methHolderS  == NULL) ? "<method holder name unavailable>" : methHolderS;
>  
> -            ast->print("%s.", klass->external_name());
> +            ast->print("%s.", methHolderS);
> ```
> 
> Note, failed test is `closed` so I have to run testing.

Is NULL method holder an acceptable situation? Could it be a sign of a bug?
BTW, `Klass::external_name()` returns `<unknown>` if `Klass::name()` is `NULL`.

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PR: https://git.openjdk.java.net/jdk/pull/6200