Mercurial > hg > graal-compiler
view src/share/vm/classfile/resolutionErrors.cpp @ 3405:8cbcd406c42e
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
author | ysr |
---|---|
date | Fri, 27 May 2011 15:05:33 -0700 |
parents | 1d1603768966 |
children | d2a62e0f25eb |
line wrap: on
line source
/* * Copyright (c) 2005, 2011, 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/resolutionErrors.hpp" #include "memory/resourceArea.hpp" #include "oops/oop.inline.hpp" #include "runtime/handles.inline.hpp" #include "runtime/safepoint.hpp" #include "utilities/hashtable.inline.hpp" // add new entry to the table void ResolutionErrorTable::add_entry(int index, unsigned int hash, constantPoolHandle pool, int cp_index, Symbol* error) { assert_locked_or_safepoint(SystemDictionary_lock); assert(!pool.is_null() && error != NULL, "adding NULL obj"); ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error); add_entry(index, entry); } // find entry in the table ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash, constantPoolHandle pool, int cp_index) { assert_locked_or_safepoint(SystemDictionary_lock); for (ResolutionErrorEntry *error_probe = bucket(index); error_probe != NULL; error_probe = error_probe->next()) { if (error_probe->hash() == hash && error_probe->pool() == pool()) { return error_probe;; } } return NULL; } void ResolutionErrorEntry::set_error(Symbol* e) { assert(e == NULL || _error == NULL, "cannot reset error"); _error = e; if (_error != NULL) _error->increment_refcount(); } // create new error entry ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, constantPoolOop pool, int cp_index, Symbol* error) { ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable<constantPoolOop>::new_entry(hash, pool); entry->set_cp_index(cp_index); NOT_PRODUCT(entry->set_error(NULL);) entry->set_error(error); return entry; } void ResolutionErrorTable::free_entry(ResolutionErrorEntry *entry) { // decrement error refcount assert(entry->error() != NULL, "error should be set"); entry->error()->decrement_refcount(); Hashtable<constantPoolOop>::free_entry(entry); } // create resolution error table ResolutionErrorTable::ResolutionErrorTable(int table_size) : Hashtable<constantPoolOop>(table_size, sizeof(ResolutionErrorEntry)) { } // GC support void ResolutionErrorTable::oops_do(OopClosure* f) { for (int i = 0; i < table_size(); i++) { for (ResolutionErrorEntry* probe = bucket(i); probe != NULL; probe = probe->next()) { assert(probe->pool() != (constantPoolOop)NULL, "resolution error table is corrupt"); assert(probe->error() != (Symbol*)NULL, "resolution error table is corrupt"); probe->oops_do(f); } } } // GC support void ResolutionErrorEntry::oops_do(OopClosure* blk) { blk->do_oop((oop*)pool_addr()); } // Remove unloaded entries from the table void ResolutionErrorTable::purge_resolution_errors(BoolObjectClosure* is_alive) { assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); for (int i = 0; i < table_size(); i++) { for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) { ResolutionErrorEntry* entry = *p; assert(entry->pool() != (constantPoolOop)NULL, "resolution error table is corrupt"); constantPoolOop pool = entry->pool(); if (is_alive->do_object_b(pool)) { p = entry->next_addr(); } else { *p = entry->next(); free_entry(entry); } } } }