blockOffsetTable.inline.hpp revision 8413:92457dfb91bd 
1/*
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24
25#ifndef SHARE_VM_GC_SHARED_BLOCKOFFSETTABLE_INLINE_HPP
26#define SHARE_VM_GC_SHARED_BLOCKOFFSETTABLE_INLINE_HPP
27
28#include "gc/shared/blockOffsetTable.hpp"
29#include "gc/shared/space.hpp"
30#include "runtime/safepoint.hpp"
31
32//////////////////////////////////////////////////////////////////////////
33// BlockOffsetTable inlines
34//////////////////////////////////////////////////////////////////////////
35inline HeapWord* BlockOffsetTable::block_start(const void* addr) const {
36  if (addr >= _bottom && addr < _end) {
37    return block_start_unsafe(addr);
38  } else {
39    return NULL;
40  }
41}
42
43//////////////////////////////////////////////////////////////////////////
44// BlockOffsetSharedArray inlines
45//////////////////////////////////////////////////////////////////////////
46inline size_t BlockOffsetSharedArray::index_for(const void* p) const {
47  char* pc = (char*)p;
48  assert(pc >= (char*)_reserved.start() &&
49         pc <  (char*)_reserved.end(),
50         "p not in range.");
51  size_t delta = pointer_delta(pc, _reserved.start(), sizeof(char));
52  size_t result = delta >> LogN;
53  assert(result < _vs.committed_size(), "bad index from address");
54  return result;
55}
56
57inline HeapWord* BlockOffsetSharedArray::address_for_index(size_t index) const {
58  assert(index < _vs.committed_size(), "bad index");
59  HeapWord* result = _reserved.start() + (index << LogN_words);
60  assert(result >= _reserved.start() && result < _reserved.end(),
61         "bad address from index");
62  return result;
63}
64
65inline void BlockOffsetSharedArray::check_reducing_assertion(bool reducing) {
66    assert(reducing || !SafepointSynchronize::is_at_safepoint() || init_to_zero() ||
67           Thread::current()->is_VM_thread() ||
68           Thread::current()->is_ConcurrentGC_thread() ||
69           ((!Thread::current()->is_ConcurrentGC_thread()) &&
70            ParGCRareEvent_lock->owned_by_self()), "Crack");
71}
72
73//////////////////////////////////////////////////////////////////////////
74// BlockOffsetArrayNonContigSpace inlines
75//////////////////////////////////////////////////////////////////////////
76inline void BlockOffsetArrayNonContigSpace::freed(HeapWord* blk,
77                                                  size_t size) {
78  freed(blk, blk + size);
79}
80
81inline void BlockOffsetArrayNonContigSpace::freed(HeapWord* blk_start,
82                                                  HeapWord* blk_end) {
83  // Verify that the BOT shows [blk_start, blk_end) to be one block.
84  verify_single_block(blk_start, blk_end);
85  // adjust _unallocated_block upward or downward
86  // as appropriate
87  if (BlockOffsetArrayUseUnallocatedBlock) {
88    assert(_unallocated_block <= _end,
89           "Inconsistent value for _unallocated_block");
90    if (blk_end >= _unallocated_block && blk_start <= _unallocated_block) {
91      // CMS-specific note: a block abutting _unallocated_block to
92      // its left is being freed, a new block is being added or
93      // we are resetting following a compaction
94      _unallocated_block = blk_start;
95    }
96  }
97}
98
99#endif // SHARE_VM_GC_SHARED_BLOCKOFFSETTABLE_INLINE_HPP
100