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8150186: Folding mismatched accesses with @Stable is incorrect

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Reviewed-by: kvn, jrose, shade
This commit is contained in:
Vladimir Ivanov 2016-02-26 01:58:26 +03:00
parent 88575c5de7
commit abebc2da5c
3 changed files with 81 additions and 4 deletions
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3
hotspot/src/share/vm/ci/ciArray.cpp
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@ -107,8 +107,9 @@ ciConstant ciArray::element_value_by_offset(intptr_t element_offset) {
intptr_t header = arrayOopDesc::base_offset_in_bytes(elembt);
intptr_t index = (element_offset - header) >> shift;
intptr_t offset = header + ((intptr_t)index << shift);
if (offset != element_offset || index != (jint)index)
if (offset != element_offset || index != (jint)index || index < 0 || index >= length()) {
return ciConstant();
}
return element_value((jint) index);
}