Integrated: 8365047: Remove exception handler stub code in C2

[Ruben]

On Thu, 7 Aug 2025 15:49:20 GMT, Ruben <duke at openjdk.org> wrote:

> The C2 exception handler stub code is only a trampoline to the generated exception handler blob. This change removes the extra step on the way to the generated blob.
> 
> According to some comments in the source code, the exception handler stub code used to be patched upon deoptimization, however presumably these comments are outdated as the patching upon deoptimization happens for post-call NOPs only.

This pull request has now been integrated.

Changeset: 3e3822ad
Author:    Ruben Ayrapetyan <ruben.ayrapetyan at arm.com>
Committer: Evgeny Astigeevich <eastigeevich at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/3e3822ad7eadbb3d86a3b94a6bd858f8c8ef9364
Stats:     569 lines in 41 files changed: 268 ins; 216 del; 85 mod

8365047: Remove exception handler stub code in C2

Co-authored-by: Martin Doerr <mdoerr at openjdk.org>
Reviewed-by: mdoerr, dlong, dfenacci, adinn, fyang, aph

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PR: https://git.openjdk.org/jdk/pull/26678