Reviewed-by: brutisso, sjohanss

Summary: prefer <sys/ptrace.h> over <linux/ptrace.h>
Reviewed-by: sla, mikael
Contributed-by: kim.barrett@oracle.com

8033626: assert(ex_map->jvms()->same_calls_as(_exceptions->jvms())) failed: all collected exceptions must come from the same place
Reviewed-by: kvn, roland

Reviewed-by: jcoomes

Summary: Place new nodes on the previous loop exit in reorg_offsets().
Reviewed-by: roland

Summary: Added a new header waiting pattern to catch the case where the target thread waiting on a condition (like a VM op); several other test improvements
Reviewed-by: sspitsyn, dholmes

Reviewed-by: stefank, jmasa

Summary: Add missing check for Opaque nodes from loop predicates in clone_loop().
Reviewed-by: iveresov

Summary: Prevent from running with Xcomp
Reviewed-by: kvn, twisti

Summary: Add a !owner check for 'waiting to lock' to catch current_pending_monitor corner cases.
Reviewed-by: dholmes, sspitsyn, kmo, zgu
Contributed-by: rednaxelafx@gmail.com, zhengyu.gu@oracle.com, daniel.daugherty@oracle.com

Summary: Access to method_type and appendix from constant pool (cpcache) needs to be guarded by is_f1_null() because of racy update/initialization.
Reviewed-by: kvn, coleenp, jrose