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diff jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/MemoryAccessProvider.java @ 24111:8abcd8e1285d

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missing checks in HotSpotMemoryAccessProviderImpl can cause VM assertions to fail (JDK-8177673)
author Doug Simon <doug.simon@oracle.com>
date Thu, 30 Mar 2017 21:18:43 +0200
parents c9993da505a0
children 8cf4cf3f9f2a
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line diff
--- a/jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/MemoryAccessProvider.java	Mon Mar 20 10:46:02 2017 +0100
+++ b/jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/MemoryAccessProvider.java	Thu Mar 30 21:18:43 2017 +0200
@@ -35,6 +35,8 @@
      * @param displacement the displacement within the object in bytes
      * @param bits the number of bits to read from memory
      * @return the read value encapsulated in a {@link JavaConstant} object of {@link JavaKind} kind
+     *         or {@code null} if {@code base} is a boxed object and the read address does not
+     *         denote a location holding an {@code kind} value
      * @throws IllegalArgumentException if {@code kind} is {@link JavaKind#Void} or not
      *             {@linkplain JavaKind#isPrimitive() primitive} kind or {@code bits} is not 8, 16,
      *             32 or 64