Reviewed-by: kvn
Contributed-by: hedongbo@huawei.com

Reviewed-by: mdoerr, apetushkov

Reviewed-by: aph

Summary: Initialize _class_vsm to NULL by default
Reviewed-by: phh
Contributed-by: thomas.stuefe@gmail.com

Summary: Synchronize gcLogFileStream::write/rotate_log
Reviewed-by: adinn, phh, snazarki
Contributed-by: xxinliu@amazon.com

Reviewed-by: andrew

Reviewed-by: rehn, stuefe, dcubed, sspitsyn

Reviewed-by: serb

Reviewed-by: tschatzl, pliden

Summary: small code improvements for increased robustness
Reviewed-by: acorn, coleenp
Contributed-by: michael.haupt@oracle.com

Reviewed-by: andrew

Summary: partially revert JDK-8238589
Reviewed-by: shade

Reviewed-by: shade, andrew

Reviewed-by: shade, apetushkov

Reviewed-by: dcubed, coleenp

Summary: Avoid use of lambdas and StringJoiner so GenerateJfrFiles builds with OpenJDK 7
Reviewed-by: shade

Reviewed-by: mgronlun

Reviewed-by: phh

8227605: Kitchensink fails "assert((((klass)->trace_id() & (JfrTraceIdEpoch::leakp_in_use_this_epoch_bit())) != 0)) failed: invariant"
Reviewed-by: dholmes, dcubed, egahlin

Reviewed-by: jbachorik

Reviewed-by: egahlin, rwestberg

8227011: Starting a JFR recording in response to JVMTI VMInit and / or Java agent premain corrupts memory
Reviewed-by: egahlin, rwestberg

Reviewed-by: mgronlun

Reviewed-by: dcubed, dholmes

Reviewed-by: neugens

Reviewed-by: clanger

Reviewed-by: gziemski, mgronlun