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_PRIMS_WHITEBOX_HPP 26 #define SHARE_PRIMS_WHITEBOX_HPP 27 28 #include "jni.h" 29 30 #include "utilities/exceptions.hpp" 31 #include "memory/allocation.hpp" 32 #include "oops/oopsHierarchy.hpp" 33 #include "oops/symbol.hpp" 34 35 #define WB_METHOD_DECLARE(result_type) extern "C" result_type JNICALL 36 37 // Unconditionally clear pedantic pending JNI checks 38 class ClearPendingJniExcCheck : public StackObj { 39 private: 40 JavaThread* _thread; 41 public: ClearPendingJniExcCheck(JNIEnv * env)42 ClearPendingJniExcCheck(JNIEnv* env) : _thread(JavaThread::thread_from_jni_environment(env)) {} ~ClearPendingJniExcCheck()43 ~ClearPendingJniExcCheck() { 44 _thread->clear_pending_jni_exception_check(); 45 } 46 }; 47 48 class CodeBlob; 49 class CodeHeap; 50 class JavaThread; 51 52 class WhiteBox : public AllStatic { 53 private: 54 static bool _used; 55 public: 56 static volatile bool compilation_locked; used()57 static bool used() { return _used; } set_used()58 static void set_used() { _used = true; } 59 static int offset_for_field(const char* field_name, oop object, 60 Symbol* signature_symbol); 61 static const char* lookup_jstring(const char* field_name, oop object); 62 static bool lookup_bool(const char* field_name, oop object); 63 static int get_blob_type(const CodeBlob* code); 64 static CodeHeap* get_code_heap(int blob_type); 65 static CodeBlob* allocate_code_blob(int size, int blob_type); 66 static int array_bytes_to_length(size_t bytes); 67 static void register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, 68 JNINativeMethod* method_array, int method_count); 69 static void register_extended(JNIEnv* env, jclass wbclass, JavaThread* thread); 70 static bool compile_method(Method* method, int comp_level, int bci, Thread* THREAD); 71 }; 72 73 #endif // SHARE_PRIMS_WHITEBOX_HPP 74