Reviewed-by: coleenp, jbachorik

8150986: serviceability/sa/jmap-hprof/JMapHProfLargeHeapTest.java failing because expects HPROF JAVA PROFILE 1.0.1 file format
Reviewed-by: dcubed, dsamersoff, andrew

Reviewed-by: aph, andrew

8239852: java/util/concurrent tests fail with -XX:+VerifyGraphEdges: assert(!VerifyGraphEdges) failed: verification should have failed
Summary: Remove an assertion which was too strong for some valid IRs when running with -XX:+VerifyGraphEdges
Reviewed-by: neliasso, thartmann

Reviewed-by: prr, psadhukhan, jdv

Reviewed-by: kvn

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