Mercurial > hg > graal-compiler
view src/share/vm/classfile/resolutionErrors.cpp @ 12456:f87c68d79f07
improved support for co-existing, multiple backends (GRAAL-363)
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 17 Oct 2013 01:08:17 +0200 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2005, 2012, 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, ConstantPool* pool, int cp_index, Symbol* error) { ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable<ConstantPool*, mtClass>::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<ConstantPool*, mtClass>::free_entry(entry); } // create resolution error table ResolutionErrorTable::ResolutionErrorTable(int table_size) : Hashtable<ConstantPool*, mtClass>(table_size, sizeof(ResolutionErrorEntry)) { } // RedefineClasses support - remove matching entry of a // constant pool that is going away void ResolutionErrorTable::delete_entry(ConstantPool* c) { 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() != NULL, "resolution error table is corrupt"); if (entry->pool() == c) { *p = entry->next(); free_entry(entry); } else { p = entry->next_addr(); } } } } // Remove unloaded entries from the table void ResolutionErrorTable::purge_resolution_errors() { 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() != (ConstantPool*)NULL, "resolution error table is corrupt"); ConstantPool* pool = entry->pool(); assert(pool->pool_holder() != NULL, "Constant pool without a class?"); ClassLoaderData* loader_data = pool->pool_holder()->class_loader_data(); if (!loader_data->is_unloading()) { p = entry->next_addr(); } else { *p = entry->next(); free_entry(entry); } } } }