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8207778: Add locking to ModuleEntry and PackageEntry tables

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Restructure ClassLoaderDataGraph code to simplify using locks in SystemDictionary::do_unloading()

Reviewed-by: lfoltan, coleenp
This commit is contained in:
Harold Seigel 2018-08-10 09:30:26 -04:00
parent 092e9e4f81
commit 83b2fb5b0d
7 changed files with 37 additions and 28 deletions
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4
src/hotspot/share/classfile/packageEntry.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2016, 2018, 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
@ -302,7 +302,7 @@ bool PackageEntry::exported_pending_delete() const {
// Remove dead entries from all packages' exported list
void PackageEntryTable::purge_all_package_exports() {
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
assert_locked_or_safepoint(Module_lock);
for (int i = 0; i < table_size(); i++) {
for (PackageEntry* entry = bucket(i);
entry != NULL;