RFR (S) JDK-6311046: -Xcheck:jni should support checking of GetPrimitiveArrayCritical

Vladimir Kozlov vladimir.kozlov at oracle.com
Mon May 5 20:56:35 UTC 2014

Hi David,

compileBroker.cpp was recently modified by 8040798 (it was pushed into 
main repo today):


And it still has the problem you pointed (overwrite _next pointer). I 
think it should be a separate fix since we don't delete the task object 
now but put it on free list. I will file a bug. Please, remove this 
change from yours.


On 5/5/14 4:37 AM, David Simms wrote:
> Gidday all:
> Bug/Enhancement: https://bugs.openjdk.java.net/browse/JDK-6311046
> Web review: http://cr.openjdk.java.net/~dsimms/6311046/rev2/
> Cleaned up the "hand rolled" memory bounds checking in
> os::malloc/realloc/free and type checking in checked JNI (GetString*),
> and unified into a single helper class "FencedMemory". Added some extra
> checks to checked JNI (release mode).
> There is now some extra debugging support for free/release operations,
> FencedMemory::release_for_freeing()" will now mark user bytes with
> "freeBlockPad", which did yeld a result when testing:
> Found a minor bug in CompilerQueue (hence CC compiler ML), shouldn't be
> a problem in practice (probably won't crash), but the code is
> incorrect...and now fixed here.
> Testing Completed:
> Ran on all platforms:
>   * JPRT
>   * jteg jdk_core & jdk_svc
>   * "RT nightly".
> Cheers
> /David Simms

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