1 /* 2 * Copyright (c) 2012, 2019, 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 #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: 61 static bool used() { return _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 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 }; 74 75 76 77 #endif // SHARE_VM_PRIMS_WHITEBOX_HPP