[foreign-jextract] RFR: 8263018: Improve API for lifecycle of native resources [v3]

[Jorn Vernee]

On Wed, 24 Mar 2021 14:51:26 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> This contains the jextract changes required to support the new changes to the foreign memory access API.
>> 
>> The main change is that now NativeScope is co-generated by jextract (although, moving forward, I'm not sure how much value it adds, but that's for another day).
>> 
>> I had to fix the extracted libclang in few places (probably better to re-generate this code once this is pushed).
>> 
>> Tests needed changes to fix imports so that they pick up the generated NativeScope class.
>
> Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addressed review comments
>   Add a debug allocator to the internal libclang which can be used to monitor/review allocator usage from libclang function

Marked as reviewed by jvernee (Committer).

test/jdk/tools/jextract/test8244959/Test8244959.java line 57:

> 55:             MemorySegment s = MemorySegment.allocateNative(1024, scope);
> 56:             my_sprintf(s,
> 57:                     toCString("%hhd %c %.2f %.2f %lld %lld %d %hd %d %d %lld %c"), 12,

`toCString` should also use the scope

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PR: https://git.openjdk.java.net/panama-foreign/pull/474