> This PR moves the section on restricted methods from the the javadoc of 
> `java.lang.foreign` package into a standalone static [javadoc 
> page](https://cr.openjdk.org/~mcimadamore/jdk/restricted_javadoc_section/docs/api/java.base/java/lang/foreign/doc-files/RestrictedMethods.html).
> 
> This is because, after [JEP 472](https://openjdk.org/jeps/472), we now have 
> restricted methods *outside* the foreign package, namely 
> `System::loadLibrary`, `Runtime::loadLibrary` (and related methods). And, 
> even before, we also had a restricted method in `ModuleLayer.Controller`.
> 
> The new static page contains some guidance of what happens when a restricted 
> method is called when there's no Java frame on the stack (this can happen 
> e.g. when upcalling into a restricted method from a native thread not known 
> to the JVM) - that is, the call is treated as originating from an unnamed 
> module.
> 
> The static page is linked from the restricted method banner in a restricted 
> method javadoc. Here's an 
> [example](https://cr.openjdk.org/~mcimadamore/jdk/restricted_javadoc_section/docs/api/java.base/java/lang/foreign/Linker.html#downcallHandle(java.lang.foreign.MemorySegment,java.lang.foreign.FunctionDescriptor,java.lang.foreign.Linker.Option...)).

Maurizio Cimadamore has updated the pull request incrementally with one 
additional commit since the last revision:

  Fix javadoc test failure

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21067/files
  - new: https://git.openjdk.org/jdk/pull/21067/files/eb2cc990..0e0944ed

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21067&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21067&range=03-04

  Stats: 5 lines in 1 file changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/21067.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21067/head:pull/21067

PR: https://git.openjdk.org/jdk/pull/21067

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