Bug ID: JDK-8362530 VM crash with -XX:+PrintTieredEvents when collecting AOT profiling

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JDK 25	JDK 26
25.0.2Fixed	26 b12Fixed

% java -XX:AOTMode=record -XX:AOTConfiguration=app.aotconf -XX:+PrintTieredEvents com.sun.tools.javac.Main HelloWorld.java
0.063094: [call level=0 [java.lang.Byte::toUnsignedInt(B)I] @-1 queues=0,0 rate=n/a load=0.000000 k=1.00,1.00 total=128,0 mdo=0(0),0(0) max levels=0,0 compilable=c1,c1-osr,c2,c2-osr status=idle mtd: #
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (/work/jdk/open/src/hotspot/share/runtime/mutex.cpp:462), pid=89389, tid=9475
#  assert(false) failed: Attempting to acquire lock TrainingData_lock/safepoint-1 out of order with lock tty_lock/tty -- possible deadlock
#
# JRE version:  (25.0) (fastdebug build )
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 25-internal-LTS-2025-06-15-0124474..., mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-aarch64)

[jdk25u-fix-request] Approval Request from Aleksey Shipilëv Improves AOTCache reliability with diagnostic options, fixes the issue in new JDK 25 feature. Applies cleanly. New test fails without the fix, passes with it. Other AOT/CDS tests are passing. There is a follow-up, JDK-8365726, which is already integrated in 25u. Risk is low: rewires diagnostics in fairly understood manner.
25-09-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk25u/pull/245 Date: 2025-09-25 16:32:33 +0000
25-09-2025
Changeset: 26ccb3ce Branch: master Author: Igor Veresov <iveresov@openjdk.org> Date: 2025-08-14 16:59:05 +0000 URL: https://git.openjdk.org/jdk/commit/26ccb3cef17a7a2a4b09af1e1e29b96d54a418aa
14-08-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/26750 Date: 2025-08-12 18:02:16 +0000
12-08-2025
ILW = Assert due to out of order locking, with AOT and PrintTieredEvents, no workaround but disabled AOT = HLM = P3
21-07-2025
This affects mainline and leyden repos. May be candidate for JDK 25 backport. Rise priority is you want to backport.
17-07-2025

Causes :	JDK-8325147 - JEP 515: Ahead-of-Time Method Profiling
Causes :	JDK-8365726 - Test crashed with assert in C1 thread: Possible safepoint reached by thread that does not allow it