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8003424: Enable Class Data Sharing for CompressedOops

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8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server

Move klass metaspace above the heap and support CDS with compressed klass ptrs.

Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank
This commit is contained in:
Harold Seigel 2013-08-15 20:04:10 -04:00
parent 9d372e7801
commit 4d91f4e69d
34 changed files with 876 additions and 552 deletions
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7
hotspot/src/share/vm/memory/heap.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -118,9 +118,12 @@ bool CodeHeap::reserve(size_t reserved_size, size_t committed_size,
_number_of_committed_segments = size_to_segments(_memory.committed_size());
_number_of_reserved_segments = size_to_segments(_memory.reserved_size());
assert(_number_of_reserved_segments >= _number_of_committed_segments, "just checking");
const size_t reserved_segments_alignment = MAX2((size_t)os::vm_page_size(), granularity);
const size_t reserved_segments_size = align_size_up(_number_of_reserved_segments, reserved_segments_alignment);
const size_t committed_segments_size = align_to_page_size(_number_of_committed_segments);
// reserve space for _segmap
if (!_segmap.initialize(align_to_page_size(_number_of_reserved_segments), align_to_page_size(_number_of_committed_segments))) {
if (!_segmap.initialize(reserved_segments_size, committed_segments_size)) {
return false;
}