Found this when working on JOL support ([CODETOOLS-7903364](https://bugs.openjdk.org/browse/CODETOOLS-7903364)). If you try to attach to VM running with -XX:ObjectAlignmentInBytes=32, then SA would fail with:
Caused by: java.lang.RuntimeException: Object alignment 32 not yet supported at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.<init>(VM.java:510) at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.initialize(VM.java:544) at jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:444) This code was added by [JDK-6916623](https://bugs.openjdk.org/browse/JDK-6916623), but I don't see a reason why it should only handle 8 and 16 byte alignment. Additional testing: - [x] New regression test - [x] Linux x86_64 fastdebug `serviceability/sa` - default - with `-XX:ObjectAlignmentInBytes=16` - with `-XX:ObjectAlignmentInBytes=32` - with `-XX:ObjectAlignmentInBytes=64` - with `-XX:ObjectAlignmentInBytes=128` - with `-XX:ObjectAlignmentInBytes=256` ------------- Commit messages: - Simplify test - Basic fix Changes: https://git.openjdk.org/jdk/pull/10762/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10762&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8295657 Stats: 105 lines in 2 files changed: 99 ins; 3 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/10762.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10762/head:pull/10762 PR: https://git.openjdk.org/jdk/pull/10762
