RFR: 8343767: Enumerate StubGen blobs, stubs and entries and generate code from declarations [v9]

[Andrew Dinn]

> Implementation of JDK-8343767

Andrew Dinn has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  increase compiler stub space for macos x86_64

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21957/files
  - new: https://git.openjdk.org/jdk/pull/21957/files/a24ee57a..73b73c53

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21957&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21957&range=07-08

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21957.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21957/head:pull/21957

PR: https://git.openjdk.org/jdk/pull/21957