1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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24
25#ifndef SHARE_GC_CMS_PROMOTIONINFO_INLINE_HPP
26#define SHARE_GC_CMS_PROMOTIONINFO_INLINE_HPP
27
28#include "gc/cms/promotionInfo.hpp"
29#include "oops/oop.inline.hpp"
30#include "utilities/debug.hpp"
31#include "utilities/macros.hpp"
32
33//////////////////////////////////////////////////////////////////////////////
34// We go over the list of promoted objects, removing each from the list,
35// and applying the closure (this may, in turn, add more elements to
36// the tail of the promoted list, and these newly added objects will
37// also be processed) until the list is empty.
38// To aid verification and debugging, in the non-product builds
39// we actually forward _promoHead each time we process a promoted oop.
40// Note that this is not necessary in general (i.e. when we don't need to
41// call PromotionInfo::verify()) because oop_iterate can only add to the
42// end of _promoTail, and never needs to look at _promoHead.
43
44template <typename OopClosureType>
45void PromotionInfo::promoted_oops_iterate(OopClosureType* cl) {
46 NOT_PRODUCT(verify());
47 PromotedObject *curObj, *nextObj;
48 for (curObj = _promoHead; curObj != NULL; curObj = nextObj) {
49 if ((nextObj = curObj->next()) == NULL) {
50 /* protect ourselves against additions due to closure application
51 below by resetting the list. */
52 assert(_promoTail == curObj, "Should have been the tail");
53 _promoHead = _promoTail = NULL;
54 }
55 if (curObj->hasDisplacedMark()) {
56 /* restore displaced header */
57 oop(curObj)->set_mark_raw(nextDisplacedHeader());
58 } else {
59 /* restore prototypical header */
60 oop(curObj)->init_mark_raw();
61 }
62 /* The "promoted_mark" should now not be set */
63 assert(!curObj->hasPromotedMark(),
64 "Should have been cleared by restoring displaced mark-word");
65 NOT_PRODUCT(_promoHead = nextObj);
66 if (cl != NULL) oop(curObj)->oop_iterate(cl);
67 if (nextObj == NULL) { /* start at head of list reset above */
68 nextObj = _promoHead;
69 }
70 }
71 assert(noPromotions(), "post-condition violation");
72 assert(_promoHead == NULL && _promoTail == NULL, "emptied promoted list");
73 assert(_spoolHead == _spoolTail, "emptied spooling buffers");
74 assert(_firstIndex == _nextIndex, "empty buffer");
75}
76
77#endif // SHARE_GC_CMS_PROMOTIONINFO_INLINE_HPP
78