On Tue, 1 Mar 2022 02:11:26 GMT, Joe Darcy <da...@openjdk.org> wrote:
>> This is an early review of changes to better model JVM access flags, that is >> "modifiers" like public, protected, etc. but explicitly at a VM level. >> >> Language level modifiers and JVM level access flags are closely related, but >> distinct. There are concepts that overlap in the two domains (public, >> private, etc.), others that only have a language-level modifier (sealed), >> and still others that only have an access flag (synthetic). >> >> The existing java.lang.reflect.Modifier class is inadequate to model these >> subtleties. For example, the bit positions used by access flags on different >> kinds of elements overlap (such as "volatile" for fields and "bridge" for >> methods. Just having a raw integer does not provide sufficient context to >> decode the corresponding language-level string. Methods like >> Modifier.methodModifiers() were introduced to cope with this situation. >> >> With additional modifiers and flags on the horizon with projects like >> Valhalla, addressing the existent modeling deficiency now ahead of time is >> reasonable before further strain is introduced. >> >> This PR in its current form is meant to give the overall shape of the API. >> It is missing implementations to map from, say, method modifiers to access >> flags, taking into account overlaps in bit positions. >> >> The CSR https://bugs.openjdk.java.net/browse/JDK-8281660 will be filled in >> once the API is further along. > > Joe Darcy has updated the pull request with a new target base due to a merge > or a rebase. The incremental webrev excludes the unrelated changes brought in > by the merge/rebase. The pull request contains 24 additional commits since > the last revision: > > - Make workding changes suggested in review feedback. > - Merge branch 'master' into JDK-8266670 > - Typo fix; add implSpec to Executable. > - Appease jcheck. > - Fix some bugs found by inspection, docs cleanup. > - Merge branch 'master' into JDK-8266670 > - Initial support for accessFlags methods > - Add mask to access flag functionality. > - Add test for location disjointness > - Minor cleanup. > - ... and 14 more: > https://git.openjdk.java.net/jdk/compare/dd292402...e63fb13e src/java.base/share/classes/java/lang/reflect/AccessFlag.java line 44: > 42: * <em>not</em> have an access flag, such as {@code sealed} (JVMS > 43: * {@jvms 4.7.31}) and some access flags have no corresponding > 44: * modifier, such as {@linkplain SYNTHETIC synthetic}. Wrong indentation: Suggestion: * modifier, such as {@linkplain SYNTHETIC synthetic}. ------------- PR: https://git.openjdk.java.net/jdk/pull/7445
