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8259067: bootclasspath append takes out object lock

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Reviewed-by: lfoltan, sspitsyn, iklam, dholmes
This commit is contained in:
Coleen Phillimore 2021-01-07 12:35:16 +00:00
parent 0e6de4eb57
commit 1c33847b8b
6 changed files with 32 additions and 26 deletions
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13
src/hotspot/share/classfile/classLoader.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2021, 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
@ -53,6 +53,7 @@ public:
ClassPathEntry* next() const;
virtual ~ClassPathEntry() {}
void set_next(ClassPathEntry* next);
virtual bool is_modules_image() const { return false; }
virtual bool is_jar_file() const { return false; }
// Is this entry created from the "Class-path" attribute from a JAR Manifest?
@ -214,9 +215,13 @@ class ClassLoader: AllStatic {
// 3. the boot loader's append path
// [-Xbootclasspath/a]; [jvmti appended entries]
// Note: boot loader append path does not support named modules.
static ClassPathEntry* _first_append_entry;
static ClassPathEntry* volatile _first_append_entry_list;
static ClassPathEntry* first_append_entry() {
return Atomic::load_acquire(&_first_append_entry_list);
}
// Last entry in linked list of appended ClassPathEntry instances
static ClassPathEntry* _last_append_entry;
static ClassPathEntry* volatile _last_append_entry;
// Info used by CDS
CDS_ONLY(static ClassPathEntry* _app_classpath_entries;)
@ -234,7 +239,7 @@ class ClassLoader: AllStatic {
CDS_ONLY(static ClassPathEntry* app_classpath_entries() {return _app_classpath_entries;})
CDS_ONLY(static ClassPathEntry* module_path_entries() {return _module_path_entries;})
static bool has_bootclasspath_append() { return _first_append_entry != NULL; }
static bool has_bootclasspath_append() { return first_append_entry() != NULL; }
protected:
// Initialization: