RFR: 8296472: Remove a JVMTI ObjectLocker

[Alan Bateman]

On Mon, 7 Nov 2022 17:07:01 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This patch moves the acquisition of the boot class loader lock out of the JVM and into the Java function.
> Tested with tier1-4, and jvmti and jdi tests locally.

src/java.base/share/classes/jdk/internal/loader/ClassLoaders.java line 204:

> 202:          * @see java.lang.instrument.Instrumentation#appendToSystemClassLoaderSearch
> 203:          */
> 204:         synchronized void appendToClassPathForInstrumentation(String path) {

We might not need this.  appendClasspath is thread safe so it's okay for several agents calling appendToSystemClassLoaderSearch at around the same time. I don't think it needs to sycnrhonize with anything else.

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PR: https://git.openjdk.org/jdk/pull/11023