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

Summary: Use notify_unload_class() to post JFR class unload events instead of doing a separate traversal of the class loader data graph
Reviewed-by: lfoltan, coleenp, mgronlun, egahlin

8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

Summary: Cast to void* within DTRACE_CLASS* macros.
Reviewed-by: coleenp, shade

Summary: Implement _lh_array_tag_type_value as const, not enum.
Reviewed-by: vlivanov, minqi

Summary: Prevent downgraded compilation tasks from recompiling.
Reviewed-by: sgehwolf, thartmann, andrew

Summary: Backport from JDK9
Reviewed-by: dholmes, coffeys

Reviewed-by: acorn, coleenp, kvn, vlivanov

Reviewed-by: acorn, hseigel, ahgross, rhalade

Summary: Add resolved_references and init_lock as hidden static field in class so root is found.
Reviewed-by: dholmes, coleenp

Summary: Improve the nmethod unloading times by optimizing the search for an itable stub in VtableStubs array
Reviewed-by: kvn, coleenp, tschatzl

Reviewed-by: coleenp, eosterlund, mchung, ahgross, rhalade

Reviewed-by: coleenp, eosterlund, mchung, ahgross, rhalade

Summary: Improve the nmethod unloading times by optimizing the search for an itable stub in VtableStubs array
Reviewed-by: kvn, coleenp, tschatzl

8156137: SIGSEGV in ReceiverTypeData::clean_weak_klass_links
8057570: RedefineClasses() tests fail assert(((Metadata*)obj)->is_valid()) failed: obj is valid
Reviewed-by: coleenp

8156137: SIGSEGV in ReceiverTypeData::clean_weak_klass_links
8057570: RedefineClasses() tests fail assert(((Metadata*)obj)->is_valid()) failed: obj is valid
Reviewed-by: coleenp

Reviewed-by: acorn, ahgross, jwilhelm, rhalade
Contributed-by: harold.seigel@oracle.com

Reviewed-by: jrose, coleenp, ahgross, acorn, vlivanov

Reviewed-by: coleenp, kevinw
Contributed-by: rachel.protacio@oracle.com

Summary: We need to check ConstMethod::method() for NULL before dereferencing.
Reviewed-by: kvn, iignatyev

Reviewed-by: coleenp, mschoene
Contributed-by: harold.seigel@oracle.com

Summary: Re-application of the change in JDK-8152271.
Reviewed-by: coleenp, sspitsyn

Summary: Re-application of the change in JDK-8152271.
Reviewed-by: coleenp, sspitsyn

Summary: Use Patching_lock to synchronize access between set_code() and clear_code().
Reviewed-by: kvn, dlong

Summary: Fix method searches to handle static, private instance and overpass
Reviewed-by: acorn

Reviewed-by: kevinw, vlivanov

Reviewed-by: kevinw, vlivanov

Summary: Backport change to correct interface initialization.
Reviewed-by: gtriantafill, sspitsyn, dholmes

Summary: Add os::vsnprintf and os::snprintf.
Reviewed-by: kbarrett, lfoltan, stuefe, mlarsson

Summary: Method::deallocate_contents() should clear 'this' from list of Methods in JNIMethodBlock, when class is unloaded.
Reviewed-by: coleenp, dholmes

Summary: Track initialized final field updates; disable constant folding if an update is detected.
Reviewed-by: vlivanov, dnsimon, forax, never, kvn, coleenp

Summary: Method::deallocate_contents() should clear 'this' from list of Methods in JNIMethodBlock, when class is unloaded.
Reviewed-by: coleenp, dholmes

Reviewed-by: iklam, acorn, mschoene

Reviewed-by: iklam, acorn, mschoene

Reviewed-by: acorn, hseigel, mschoene

Reviewed-by: coleenp

Reviewed-by: coleenp

Reviewed-by: kvn, jrose, kevinw, ahgross

Reviewed-by: kvn, jrose, kevinw, ahgross

Reviewed-by: coleenp, roland