OpenJDK: need little help with ObjC

[Sergey Fedorov]

Thank you, Ken.

This is the reference to the current code in OpenJDK 8:
https://github.com/openjdk/jdk8u/blob/105098218562ce8b62938fb7def2cde918df0b45/jdk/src/macosx/bin/java_md_macosx.c#L1027-L1062


On Tue, Jul 16, 2024 at 10:45 PM Ken Cunningham <
ken.cunningham.webuse at gmail.com> wrote:

> The usual equivalent older construct is this:
>
>
> NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
> {
>
> }
> [pool drain];
>
>
> which (AFAIK) does exactly the same thing as:
>
> @autoreleasepool
> {
>
> }
>
> but just a little less beautifully.
>
> Now the commit you referenced has this older construct still in place. But
> I didn't look at the current source code that you are compiling to see what
> it has.
>
> Ken
>
> NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
> { } [pool drain];
> > On Jul 16, 2024, at 7:17 AM, Sergey Fedorov <vital.had at gmail.com> wrote:
> >
> > On Tue, Jul 16, 2024 at 6:19 PM Saagar Jha <saagar at saagarjha.com> wrote:
> > I’m guessing that since the block runs elsewhere there isn’t an
> autoreleasepool for it anymore. You can probably fix this by wrapping the
> call to JavaMain in @autoreleasepool {}?
> > Saagar Jha
> >
> > This syntax is not supported by GCC, we need to use a standard ObjC
> somehow.
> >
> >>
> >> On Jul 10, 2024, at 02:47, Riccardo Mottola via macports-dev <
> macports-dev at lists.macports.org> wrote:
> >>
> >> Hi,
> >>
> >> Sergio Had wrote:
> >>> I have finally built the thing and it works, from looks of things, but
> I get a message on startup:
> >>> 36-25%
> /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_java_openjdk8/openjdk8/work/jdk8u-jdk8u372-ga/build/openjdk8/images/j2sdk-image/bin/java
> -version
> >>> 2024-07-09 18:34:10.587 java[13785:1903] *** __NSAutoreleaseNoPool():
> Object 0x5d12e50 of class NSCFDictionary autoreleased with no pool in place
> - just leaking
> >>> 2024-07-09 18:34:10.590 java[13785:1903] *** __NSAutoreleaseNoPool():
> Object 0x5d13310 of class NSCFData autoreleased with no pool in place -
> just leaking
> >>> openjdk version "1.8.0_372"
> >>> OpenJDK Runtime Environment (build 1.8.0_372-root_2024_07_09_15_56-b00)
> >>> OpenJDK Zero VM (build 25.372-b00, interpreted mode)
> >>>
> >>> This seems to be related to the code, which upstream has switched to
> block syntax (it does not build with GCC), so I had to use its earlier
> version.
> >>> From commit message it seems upstream also had this startup issue:
> >>>
> https://github.com/openjdk/jdk8u/commit/c29d997ca180ba5d812df7745c668cfc906be20b
> >>
> >> the message tells you that you are using NS* objects without an
> Autorelease Pool. It will cause issues, but "should work", so your app
> should run.
> >> I notice what they appear to be CoreFoundation bridge object. You
> should try to track where they come from, maybe put a breakpoint and
> stacktrace.
> >>
> >> The snipped seen in the commit looks trivial, no nsblocks needed and
> has an fresh ARP allocated, so I think the issue is elsewhere.
> >>
> >> Riccardo
> >
>
>
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