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// Unconditionally clear pedantic pending JNI checks
37class ClearPendingJniExcCheck : public StackObj {
38private:
39  JavaThread* _thread;
40public:
41  ClearPendingJniExcCheck(JNIEnv* env) : _thread(JavaThread::thread_from_jni_environment(env)) {}
42  ~ClearPendingJniExcCheck() {
43    _thread->clear_pending_jni_exception_check();
44  }
45};
46
47// Entry macro to transition from JNI to VM state.
48
49#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header) \
50  ClearPendingJniExcCheck _clearCheck(env);
51
52#define WB_END JNI_END
53#define WB_METHOD_DECLARE(result_type) extern "C" result_type JNICALL
54
55#define CHECK_JNI_EXCEPTION_(env, value)                               \
56  do {                                                                 \
57    JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
58    if (HAS_PENDING_EXCEPTION) {                                       \
59      return(value);                                                   \
60    }                                                                  \
61  } while (0)
62
63#define CHECK_JNI_EXCEPTION(env)                                       \
64  do {                                                                 \
65    JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
66    if (HAS_PENDING_EXCEPTION) {                                       \
67      return;                                                          \
68    }                                                                  \
69  } while (0)
70
71class CodeBlob;
72class CodeHeap;
73class JavaThread;
74
75class WhiteBox : public AllStatic {
76 private:
77  static bool _used;
78 public:
79  static volatile bool compilation_locked;
80  static bool used()     { return _used; }
81  static void set_used() { _used = true; }
82  static int offset_for_field(const char* field_name, oop object,
83    Symbol* signature_symbol);
84  static const char* lookup_jstring(const char* field_name, oop object);
85  static bool lookup_bool(const char* field_name, oop object);
86  static int get_blob_type(const CodeBlob* code);
87  static CodeHeap* get_code_heap(int blob_type);
88  static CodeBlob* allocate_code_blob(int size, int blob_type);
89  static int array_bytes_to_length(size_t bytes);
90  static void register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread,
91    JNINativeMethod* method_array, int method_count);
92  static void register_extended(JNIEnv* env, jclass wbclass, JavaThread* thread);
93  static bool compile_method(Method* method, int comp_level, int bci, Thread* THREAD);
94};
95
96
97
98#endif // SHARE_VM_PRIMS_WHITEBOX_HPP
99