[jdk16] RFR: 8257910: [JVMCI] Set exception_seen accordingly in the runtime.

[Vladimir Kozlov]

On Thu, 10 Dec 2020 17:54:45 GMT, Yudi Zheng <yzheng at openjdk.org> wrote:

> Update exception_seen flag in the MDO when no exception handler is found for caller during deoptimization, or when exception is thrown in the runtime.
> 
> Plus, -Xlog:exceptions=info code and AbortVMOnException are adjusted in C1 runtime and jvmci runtime to be consistent with C2, i.e., before JvmtiExport::can_post_on_exceptions deoptimization and fast continuation when compiled handler is found.

Good.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk16/pull/2