On Fri, 13 Dec 2024 19:30:19 GMT, Henry Jen <[email protected]> wrote:
>> This PR split out large array/set construction into separate factory methods
>> to avoid oversized method trying to construct several of those.
>>
>> In order to do that, we will need to generate those help methods on demand
>> in the class builder. Here we have two approach, one is for dedup set, which
>> is processed in advance so we can know what methods should be created.
>>
>> Another is for random set, such as packages, thus we put those request into
>> a queue to amend the class later.
>>
>> To keep the optimization of caching built value that are references more
>> than once, it was implemented using local vars, which doesn't work well for
>> helper methods. The existing approach to populate local vars doesn't work
>> well with larger scope of split operation, as the slot was allocated on
>> lazily built, but the transfer is captured in advance, this count could
>> mismatch as built time and run time.
>>
>> So we make this build in advance, and use a static array for values referred
>> more than once.
>>
>> All the codegen instead of giving index to be loaded, the builder snippet
>> now load the wanted set/array to the operand stack to be consistent.
>
> Henry Jen has updated the pull request incrementally with one additional
> commit since the last revision:
>
> Move up Snippet setup as a builder
src/jdk.jlink/share/classes/jdk/tools/jlink/internal/Snippets.java line 74:
> 72: return cob ->
> 73: cob.loadConstant(value)
> 74:
> .invokestatic(ClassDesc.ofInternalName("java/lang/Integer"), "valueOf",
> MethodTypeDesc.of(CD_Integer, CD_int));
Suggestion:
.invokestatic(CD_Integer, "valueOf",
MethodTypeDesc.of(CD_Integer, CD_int));
src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/ModuleDescriptorBuilder.java
line 166:
> 164: .ownerClassDesc(ownerClassDesc)
> 165: .methodNamePrefix("module" + index + "Requires")
> 166: .pageSize(2000) // number safe for a single page
> helper under 64K size limit
Nit: define a constant for this number like `STRING_PAGE_SIZE`
src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/SystemModulesPlugin.java
line 1205:
> 1203: * dedupSetValues[countOfStoredValues - 1] = ...
> 1204: * }
> 1205: */
This javadoc also needs update. The helper method name no longer uses
"Provider" suffix.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/21022#discussion_r1884638693
PR Review Comment: https://git.openjdk.org/jdk/pull/21022#discussion_r1884637126
PR Review Comment: https://git.openjdk.org/jdk/pull/21022#discussion_r1884635868
