1 /* 2 * Copyright (c) 2012, 2013, 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 "memory/allocation.hpp" 31 #include "oops/oopsHierarchy.hpp" 32 33 // Entry macro to transition from JNI to VM state. 34 35 #define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header) 36 #define WB_END JNI_END 37 #define WB_METHOD_DECLARE(result_type) extern "C" result_type JNICALL 38 39 #define CHECK_JNI_EXCEPTION_(env, value) \ 40 do { \ 41 if (env->ExceptionCheck()) { \ 42 env->ExceptionClear(); \ 43 return(value); \ 44 } \ 45 } while (0) 46 47 #define CHECK_JNI_EXCEPTION(env) \ 48 do { \ 49 if (env->ExceptionCheck()) { \ 50 env->ExceptionClear(); \ 51 return; \ 52 } \ 53 } while (0) 54 55 class WhiteBox : public AllStatic { 56 private: 57 static bool _used; 58 public: 59 static bool used() { return _used; } 60 static void set_used() { _used = true; } 61 static int offset_for_field(const char* field_name, oop object, 62 Symbol* signature_symbol); 63 static const char* lookup_jstring(const char* field_name, oop object); 64 static bool lookup_bool(const char* field_name, oop object); 65 }; 66 67 68 69 #endif // SHARE_VM_PRIMS_WHITEBOX_HPP