RFR (S): 8228858: Reimplement JVM_RawMonitors to use PlatformMutex
david.holmes at oracle.com
Wed Aug 14 12:32:17 UTC 2019
A JVM_RawMonitor (not to be confused with JvmtiRawMonitor) is a simple
mutex (despite the name) currently implemented via two special entry
points in the VM Monitor code. This fix changes that so that a
JVM_RawMonitor is just a PlatformMutex, enabling us to delete the
special Monitor code.
There are two clients of JVM_RawMonitor:
- the native Zip library provided by the JDK and used by the JVM during
- AWT debug code
The first should be tested by using the VM. :) The second I don't know.
But the functionality we're testing is already present so there's
sufficient coverage just by testing one client.
Testing: tiers 1 - 3 on Linux/macOS/Window x64, Solaris sparcv9
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