whitebox.hpp revision 8190:1c8a3e6441f6 
1/*
2 * Copyright (c) 2012, 2014, 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_VM_PRIMS_WHITEBOX_HPP
26#define SHARE_VM_PRIMS_WHITEBOX_HPP
27
28#include "prims/jni.h"
29
30#include "utilities/exceptions.hpp"
31#include "memory/allocation.hpp"
32#include "oops/oopsHierarchy.hpp"
33#include "oops/symbol.hpp"
34#include "runtime/interfaceSupport.hpp"
35
36// Entry macro to transition from JNI to VM state.
37
38#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
39#define WB_END JNI_END
40#define WB_METHOD_DECLARE(result_type) extern "C" result_type JNICALL
41
42#define CHECK_JNI_EXCEPTION_(env, value)                               \
43  do {                                                                 \
44    JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
45    if (HAS_PENDING_EXCEPTION) {                                       \
46      return(value);                                                   \
47    }                                                                  \
48  } while (0)
49
50#define CHECK_JNI_EXCEPTION(env)                                       \
51  do {                                                                 \
52    JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
53    if (HAS_PENDING_EXCEPTION) {                                       \
54      return;                                                          \
55    }                                                                  \
56  } while (0)
57
58class CodeBlob;
59class CodeHeap;
60class JavaThread;
61
62class WhiteBox : public AllStatic {
63 private:
64  static bool _used;
65 public:
66  static volatile bool compilation_locked;
67  static bool used()     { return _used; }
68  static void set_used() { _used = true; }
69  static int offset_for_field(const char* field_name, oop object,
70    Symbol* signature_symbol);
71  static const char* lookup_jstring(const char* field_name, oop object);
72  static bool lookup_bool(const char* field_name, oop object);
73  static int get_blob_type(const CodeBlob* code);
74  static CodeHeap* get_code_heap(int blob_type);
75  static CodeBlob* allocate_code_blob(int size, int blob_type);
76  static int array_bytes_to_length(size_t bytes);
77  static void register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread,
78    JNINativeMethod* method_array, int method_count);
79  static void register_extended(JNIEnv* env, jclass wbclass, JavaThread* thread);
80};
81
82
83
84#endif // SHARE_VM_PRIMS_WHITEBOX_HPP
85