RFR: 8286694: Incorrect argument processing in java launcher

[Yasumasa Suenaga]

On Mon, 16 May 2022 13:20:49 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> GCC 12 reports as following:
>
> I don't recall what "builtin arguments" means. Can you tell me how we would actually hit this conditions such that we string dup and  the null string? Or are you saying this is actually an unreachable case: the check for NULL is always false and the actual  string is never null anyway?

@dholmes-ora 
As I wrote in the description, `jargv` comes from `JAVA_ARGS` or `EXTRA_JAVA_ARGS` - end user cannot modify them. So I think they should be reported as developer error.
OTOH JDK developer cannot know invalid options if they do not set trace mode to launcher. So I want to discuss how we should handle invalid parameter(s) in `jargv`.

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PR: https://git.openjdk.java.net/jdk/pull/8694