This is subtask of JDK-8299426: Heap dump does not contain virtual Thread stack references The change: - reorganize thread-related code/prepare it to use for unmounted vthreads; - separate track traces for mounted virtual threads: - separate HPROF_FRAME/HPROF_TRACE records for mounted vthreads and carrier threads; - separate HPROF_GC_ROOT_THREAD_OBJ/HPROF_GC_ROOT_JAVA_FRAME/HPROF_GC_ROOT_JNI_LOCAL subrecords; - updated hprof parser test lib to collect data about threads (HPROF_GC_ROOT_THREAD_OBJ subrecords).
Testing - tier1-tier3, new test ------------- Commit messages: - copyright in hprof test lib - separate stack traces for mounted VT Changes: https://git.openjdk.org/jdk/pull/15869/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15869&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8316691 Stats: 887 lines in 6 files changed: 689 ins; 137 del; 61 mod Patch: https://git.openjdk.org/jdk/pull/15869.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15869/head:pull/15869 PR: https://git.openjdk.org/jdk/pull/15869
