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8212995: Placing the Integer.IntegerCache and cached Integer objects in the closed archive heap region

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Support shareable archive object subgraphs in closed archive heap regions.

Reviewed-by: iklam, ccheung
This commit is contained in:
Jiangli Zhou 2018-11-03 15:40:19 -04:00
parent e3a2417b63
commit 80ad2c7e71
9 changed files with 284 additions and 174 deletions
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6
src/java.base/share/classes/java/lang/Integer.java
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@ -992,6 +992,12 @@ public final class Integer extends Number implements Comparable<Integer> {
* During VM initialization, java.lang.Integer.IntegerCache.high property
* may be set and saved in the private system properties in the
* jdk.internal.misc.VM class.
*
* WARNING: The cache is archived with CDS and reloaded from the shared
* archive at runtime. The archived cache (Integer[]) and Integer objects
* reside in the closed archive heap regions. Care should be taken when
* changing the implementation and the cache array should not be assigned
* with new Integer object(s) after initialization.
*/
private static class IntegerCache {