> Hi, > > This PR updates the VM implementation of the foreign linker, by bringing over > commits from the panama-foreign repo. > > This is split off from the main JEP integration for 19, since we have limited > resources to handle this. As such, this PR might fall over to 20, but it > would be nice if we could get it into 19. > > I've written up an overview of the Linker architecture here: > http://cr.openjdk.java.net/~jvernee/docs/FL_Overview.html it might be useful > to read that first. > > This patch moves from the "legacy" implementation, to what is currently > implemented in the panama-foreign repo, except for replacing the use of > method handle combinators with ASM. That will come in a later path. To recap. > This PR contains the following changes: > > 1. VM stubs for downcalls are now generated up front, instead of lazily by C2 > [1]. > 2. the VM support for upcalls/downcalls now support all possible call shapes. > And VM stubs and Java code implementing the buffered invocation strategy has > been removed [2], [3], [4], [5]. > 3. The existing C2 intrinsification support for the `linkToNative` method > handle linker was no longer needed and has been removed [6] (support might be > re-added in another form later). > 4. Some other cleanups, such as: OptimizedEntryBlob (for upcalls) now > implements RuntimeBlob directly. Binding to java classes has been rewritten > to use javaClasses.h/cpp (this wasn't previously possible due to these java > classes being in an incubator module) [7], [8], [9]. > > While the patch mostly consists of VM changes, there are also some Java > changes to support (2). > > The original commit structure has been mostly retained, so it might be useful > to look at a specific commit, or the corresponding patch in the > [panama-foreign](https://github.com/openjdk/panama-foreign/pulls?q=is%3Apr) > repo as well. I've also left some inline comments to explain some of the > changes, which will hopefully make reviewing easier. > > Testing: Tier1-4 > > Thanks, > Jorn > > [1]: > https://github.com/openjdk/jdk/pull/7959/commits/048b88156814579dca1f70742061ad24942fd358 > [2]: > https://github.com/openjdk/jdk/pull/7959/commits/2fbbef472b4c2b4fee5ede2f18cd81ab61e88f49 > [3]: > https://github.com/openjdk/jdk/pull/7959/commits/8a957a4ed9cc8d1f708ea8777212eb51ab403dc3 > [4]: > https://github.com/openjdk/jdk/pull/7959/commits/35ba1d964f1de4a77345dc58debe0565db4b0ff3 > [5]: > https://github.com/openjdk/jdk/pull/7959/commits/4e72aae22920300c5ffa16fed805b62ed9092120 > [6]: > https://github.com/openjdk/jdk/pull/7959/commits/08e22e1b468c5c8f0cfd7135c72849944068aa7a > [7]: > https://github.com/openjdk/jdk/pull/7959/commits/451cd9edf54016c182dab21a8b26bd8b609fc062 > [8]: > https://github.com/openjdk/jdk/pull/7959/commits/4c851d2795afafec3a3ab17f4142ee098692068f > [9]: > https://github.com/openjdk/jdk/pull/7959/commits/d025377799424f31512dca2ffe95491cd5ae22f9
Jorn Vernee has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 98 commits: - Merge branch 'master' into JEP-19-VM-IMPL2 - Undo spurious changes. - Merge branch 'JEP-19-VM-IMPL2' of https://github.com/JornVernee/jdk into JEP-19-VM-IMPL2 - Apply copyright year updates per request of @nick-arm Co-authored-by: Nick Gasson <nick.gas...@arm.com> - Fix overwritten copyright years. - Missed 2 years - Update Oracle copyright years - Revert "Block async exceptions during upcalls" This reverts commit b29ad8f46732666f2d07e63ce8701b1eb7bed790. - Block async exceptions during upcalls - Merge branch 'foreign-preview-m' into JEP-19-VM-IMPL2 - ... and 88 more: https://git.openjdk.java.net/jdk/compare/2c5d1362...f55b6c59 ------------- Changes: https://git.openjdk.java.net/jdk/pull/7959/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7959&range=16 Stats: 6913 lines in 155 files changed: 2576 ins; 3219 del; 1118 mod Patch: https://git.openjdk.java.net/jdk/pull/7959.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7959/head:pull/7959 PR: https://git.openjdk.java.net/jdk/pull/7959
