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.
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5  * This code is free software; you can redistribute it and/or modify it
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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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24 
25 #ifndef SHARE_VM_PRIMS_WHITEBOX_HPP
26 #define SHARE_VM_PRIMS_WHITEBOX_HPP
27 
28 #include "prims/jni.h"
29 
30 #include "memory/allocation.hpp"
31 #include "oops/oopsHierarchy.hpp"
32 #include "oops/symbol.hpp"
33 #include "runtime/interfaceSupport.hpp"
34 
35 // Entry macro to transition from JNI to VM state.
36 
37 #define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
38 #define WB_END JNI_END
39 #define WB_METHOD_DECLARE(result_type) extern "C" result_type JNICALL
40 
41 #define CHECK_JNI_EXCEPTION_(env, value)                               \
42   do {                                                                 \
43     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
44     if (HAS_PENDING_EXCEPTION) {                                       \
45       return(value);                                                   \
46     }                                                                  \
47   } while (0)
48 
49 #define CHECK_JNI_EXCEPTION(env)                                       \
50   do {                                                                 \
51     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
52     if (HAS_PENDING_EXCEPTION) {                                       \
53       return;                                                          \
54     }                                                                  \
55   } while (0)
56 
57 class WhiteBox : public AllStatic {
58  private:
59   static bool _used;
60  public:
used()61   static bool used()     { return _used; }
set_used()62   static void set_used() { _used = true; }
63   static int offset_for_field(const char* field_name, oop object,
64     Symbol* signature_symbol);
65   static const char* lookup_jstring(const char* field_name, oop object);
66   static bool lookup_bool(const char* field_name, oop object);
67   static int get_blob_type(const CodeBlob* code);
68   static CodeBlob* allocate_code_blob(int size, int blob_type);
69   static int array_bytes_to_length(size_t bytes);
70   static void register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread,
71     JNINativeMethod* method_array, int method_count);
72   static void register_extended(JNIEnv* env, jclass wbclass, JavaThread* thread);
73   static bool compile_method(Method* method, int comp_level, int bci, Thread* THREAD);
74 };
75 
76 
77 
78 #endif // SHARE_VM_PRIMS_WHITEBOX_HPP
79