RFR[9](XS): 8037298: Export HotSpots 'optimized' (i.e. not-product) configuration in the top-level configure/makefile

Magnus Ihse Bursie magnus.ihse.bursie at oracle.com
Tue Mar 18 10:37:35 UTC 2014

On 2014-03-14 17:55, Volker Simonis wrote:
> Hi Magnus,
> thanks for your detailed comments.
> I generally agree with your analysis of the problem.
> However, as you correctly noticed, the 'optimized' configuration is
> actually a "HotSpot only" concept. It is used to enable extra
> options/functionality which should not be shipped to the customer.
> Everything flagged with "#ifndef PRODUCT" in HotSpot is enabled by
> default in the "slowdebug" and "fastdebug" configuration - so no
> problem. But the Hotspot has this extra configuration called
> 'optimized' which is exactly like a release build, but with the extra,
> "#ifndef PRODUCT" stuff enabled. This may be useful for example for
> testing/benchmarking new functionality (i.e. you don't want to
> benchmark with a debug build).
> There's no general 'optimized' concept for the jdk and the other
> repositories as far as I can see. The "PRODUCT" macro is only used in
> src/share/native/com/sun/java/util/jar/pack/* within the 'jdk/'
> repository (and it is used there with a DEBUG/ASSERT semantics).
> I'd therefore propose to slightly modify my change as follows:
>      optimized )
>        DEBUG_LEVEL="release"
>        VARIANT="OPT"
>        FASTDEBUG="false"
>        DEBUG_CLASSFILES="false"
>        BUILD_VARIANT_RELEASE="-optimized"
>        HOTSPOT_DEBUG_LEVEL="optimized"
>        HOTSPOT_EXPORT="optimized"
>        ;;

Okay. This seems more robust.

However, I think it's a bit scary to change the value of DEBUG_LEVEL, 
it's sort of considered to be a straight mapping from the configure 
command line option. I'm okay with it, but it needs to be done more 
explicitely. Either a comment at the place where you modify it to 
"release", or -- even better -- a separate if statement after the case 
block that clearly shows that optimized is replaced with release, with 
proper comments.

Also, you do not need to do AC_SUBST unless you publish the value in 
spec.gmk. If you want to use the variable HOTSPOT_DEBUG_LEVEL in the 
makefiles, you need to add it to spec.gmk.in (or hotspot-spec.gmk.in). 
If not, you do not need the AC_SUBST.

Apart from that, the change looks good.


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