提交 0bda407c 编写于 作者: K kvn

6979458: VM crashes when -XX:ObjectAlignmentInBytes is too big

Summary: Set upper limit 256 for ObjectAlignmentInBytes value.
Reviewed-by: never, iveresov
上级 6bec70e0
......@@ -1261,12 +1261,30 @@ bool verify_object_alignment() {
// Object alignment.
if (!is_power_of_2(ObjectAlignmentInBytes)) {
jio_fprintf(defaultStream::error_stream(),
"error: ObjectAlignmentInBytes=%d must be power of 2", (int)ObjectAlignmentInBytes);
"error: ObjectAlignmentInBytes=%d must be power of 2\n",
(int)ObjectAlignmentInBytes);
return false;
}
if ((int)ObjectAlignmentInBytes < BytesPerLong) {
jio_fprintf(defaultStream::error_stream(),
"error: ObjectAlignmentInBytes=%d must be greater or equal %d", (int)ObjectAlignmentInBytes, BytesPerLong);
"error: ObjectAlignmentInBytes=%d must be greater or equal %d\n",
(int)ObjectAlignmentInBytes, BytesPerLong);
return false;
}
// It does not make sense to have big object alignment
// since a space lost due to alignment will be greater
// then a saved space from compressed oops.
if ((int)ObjectAlignmentInBytes > 256) {
jio_fprintf(defaultStream::error_stream(),
"error: ObjectAlignmentInBytes=%d must not be greater then 256\n",
(int)ObjectAlignmentInBytes);
return false;
}
// In case page size is very small.
if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) {
jio_fprintf(defaultStream::error_stream(),
"error: ObjectAlignmentInBytes=%d must be less then page size %d\n",
(int)ObjectAlignmentInBytes, os::vm_page_size());
return false;
}
return true;
......
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