TestJhsdbJstackMixedWithXComp.java fails on Ubuntu 26.04 on Neoverse V1 and V2 processor.
I introduced DWARF support in mixed jstack in [JDK-8377946](https://bugs.openjdk.org/browse/JDK-8377946), however I mentioned it does not support PAC (Pointer Authentication Code) in PR #29731. It is the reason why TestJhsdbJstackMixedWithXComp.java failed on Neoverse V1 and V2. They support PAC, and it is enabled on the Kernel on Ubuntu 26.04 by default. This PR adds to feature to treat PAC in Linux AArch64. It is Arm-specific feature, so I separated them in following new classes. It is one of the reason why this change is bigger. - AARCH64DwarfParser.java - LinuxAARCH64DebuggerLocal.java - aarch64Dwarf.cpp/hpp (for `DwarfParser` in native) serviceability/sa tests passed on Linux AMD64, Linux AArch64 (PAC disabled), and Linux AArch64 (PAC enabled). --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8386593: AArch64: serviceability/sa/TestJhsdbJstackMixedWithXComp.java fails on Ubuntu 26.04 Changes: https://git.openjdk.org/jdk/pull/31669/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31669&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8386593 Stats: 480 lines in 18 files changed: 418 ins; 43 del; 19 mod Patch: https://git.openjdk.org/jdk/pull/31669.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31669/head:pull/31669 PR: https://git.openjdk.org/jdk/pull/31669
