8055814: [TESTBUG] runtime/NMT/NMTWithCDS.java fails with product builds due to missing UnlockDiagnosticVMOptions
Summary: Passing -XX:+UnlockDiagnosticVMOptions to ProcessBuilder
Reviewed-by: zgu, gtriantafill

Reviewed-by: shade, roland

Summary: "--cpus" is only available in Docker 1.13 and higher, and is the equivalent of setting both --cpu-period and --cpu-quota.
Reviewed-by: bobv, dholmes
Contributed-by: aoqi@loongson.cn

Reviewed-by: mdoerr, zgu

Reviewed-by: kvn, thartmann
Contributed-by: fairoz.matte@oracle.com

Summary: skip sfpt optimization for Load is removed for Java Object's Markword Load.
Reviewed-by: kvn, dlong

Summary: Remove Linux kernel version check as very unlikely a kernel older than 2.4 will be used.
Reviewed-by: erikj

8180904: Hotspot tests running with -agentvm failing due to classpath
Summary: Add -cp System.getProperty("java.class.path") to ProcessBuilder arguments.
Reviewed-by: sla, gtriantafill

Reviewed-by: aph, mdoerr

Summary: Introduce alignment-safe Copy::conjoint_swap and JVM_CopySwapMemory
Reviewed-by: mikael, dholmes

Reviewed-by: prr