1 /*
 2  * Copyright (c) 2023, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #ifndef SHARE_CDS_CDSACCESS_HPP
26 #define SHARE_CDS_CDSACCESS_HPP
27 
28 #include "cds/archiveBuilder.hpp"
29 #include "cds/archiveUtils.hpp"
30 #include "memory/allStatic.hpp"
31 #include "oops/oopsHierarchy.hpp"
32 #include "utilities/globalDefinitions.hpp"
33 
34 class InstanceKlass;
35 class Klass;
36 class Method;
37 class ReservedSpace;
38 
39 class CDSAccess : AllStatic {
40 private:
41   static bool can_generate_cached_code(address addr) NOT_CDS_RETURN_(false);
42 public:
43   static bool can_generate_cached_code(Method* m) {
44     return can_generate_cached_code((address)m);
45   }
46   static bool can_generate_cached_code(Klass* k) {
47     return can_generate_cached_code((address)k);
48   }
49   static bool can_generate_cached_code(InstanceKlass* ik) NOT_CDS_RETURN_(false);
50 
51   static uint delta_from_shared_address_base(address addr);
52   static Method* method_in_cached_code(Method* m) NOT_CDS_RETURN_(nullptr);
53 
54   static int get_archived_object_permanent_index(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(-1);
55   static oop get_archived_object(int permanent_index) NOT_CDS_JAVA_HEAP_RETURN_(nullptr);
56 
57   static void test_heap_access_api() NOT_CDS_JAVA_HEAP_RETURN;
58 
59   static void* allocate_from_code_cache(size_t size) NOT_CDS_RETURN_(nullptr);
60 
61   static size_t get_cached_code_size() NOT_CDS_JAVA_HEAP_RETURN_(0);
62   static void set_cached_code_size(size_t sz) NOT_CDS_JAVA_HEAP_RETURN;
63 
64   static bool map_cached_code(ReservedSpace rs) NOT_CDS_JAVA_HEAP_RETURN_(false);
65 
66   template <typename T>
67   static void set_pointer(T** ptr, T* value) {
68     set_pointer((address*)ptr, (address)value);
69   }
70   static void set_pointer(address* ptr, address value);
71 };
72 
73 #endif // SHARE_CDS_CDSACCESS_HPP