Mon, 10 May 2010 12:31:52 -0700
6951188: CMS: move PromotionInfo into its own file
Summary: Moved PromotionInfo and friends into new files promotionInfo.{h,c}pp from their previous compactibleFreeListSpace.{h,c}pp home.
Reviewed-by: apetrusenko
1 /*
2 * Copyright 2002-2005 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_cmsLockVerifier.cpp.incl"
28 ///////////// Locking verification specific to CMS //////////////
29 // Much like "assert_lock_strong()", except that it relaxes the
30 // assertion somewhat for the parallel GC case, where VM thread
31 // or the CMS thread might hold the lock on behalf of the parallel
32 // threads. The second argument is in support of an extra locking
33 // check for CFL spaces' free list locks.
34 #ifndef PRODUCT
35 void CMSLockVerifier::assert_locked(const Mutex* lock,
36 const Mutex* p_lock1,
37 const Mutex* p_lock2) {
38 if (!Universe::is_fully_initialized()) {
39 return;
40 }
42 Thread* myThread = Thread::current();
44 if (lock == NULL) { // a "lock-free" structure, e.g. MUT, protected by CMS token
45 assert(p_lock1 == NULL && p_lock2 == NULL, "Unexpected caller error");
46 if (myThread->is_ConcurrentGC_thread()) {
47 // This test might have to change in the future, if there can be
48 // multiple peer CMS threads. But for now, if we're testing the CMS
49 assert(myThread == ConcurrentMarkSweepThread::cmst(),
50 "In CMS, CMS thread is the only Conc GC thread.");
51 assert(ConcurrentMarkSweepThread::cms_thread_has_cms_token(),
52 "CMS thread should have CMS token");
53 } else if (myThread->is_VM_thread()) {
54 assert(ConcurrentMarkSweepThread::vm_thread_has_cms_token(),
55 "VM thread should have CMS token");
56 } else {
57 // Token should be held on our behalf by one of the other
58 // of CMS or VM thread; not enough easily testable
59 // state info to test which here.
60 assert(myThread->is_GC_task_thread(), "Unexpected thread type");
61 }
62 return;
63 }
65 if (myThread->is_VM_thread()
66 || myThread->is_ConcurrentGC_thread()
67 || myThread->is_Java_thread()) {
68 // Make sure that we are holding the associated lock.
69 assert_lock_strong(lock);
70 // The checking of p_lock is a spl case for CFLS' free list
71 // locks: we make sure that none of the parallel GC work gang
72 // threads are holding "sub-locks" of freeListLock(). We check only
73 // the parDictionaryAllocLock because the others are too numerous.
74 // This spl case code is somewhat ugly and any improvements
75 // are welcome.
76 assert(p_lock1 == NULL || !p_lock1->is_locked() || p_lock1->owned_by_self(),
77 "Possible race between this and parallel GC threads");
78 assert(p_lock2 == NULL || !p_lock2->is_locked() || p_lock2->owned_by_self(),
79 "Possible race between this and parallel GC threads");
80 } else if (myThread->is_GC_task_thread()) {
81 // Make sure that the VM or CMS thread holds lock on our behalf
82 // XXX If there were a concept of a gang_master for a (set of)
83 // gang_workers, we could have used the identity of that thread
84 // for checking ownership here; for now we just disjunct.
85 assert(lock->owner() == VMThread::vm_thread() ||
86 lock->owner() == ConcurrentMarkSweepThread::cmst(),
87 "Should be locked by VM thread or CMS thread on my behalf");
88 if (p_lock1 != NULL) {
89 assert_lock_strong(p_lock1);
90 }
91 if (p_lock2 != NULL) {
92 assert_lock_strong(p_lock2);
93 }
94 } else {
95 // Make sure we didn't miss some other thread type calling into here;
96 // perhaps as a result of future VM evolution.
97 ShouldNotReachHere();
98 }
99 }
100 #endif