1 /* 2 * Copyright (c) 1997, 2015, 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_NATIVELOOKUP_HPP 26 #define SHARE_VM_PRIMS_NATIVELOOKUP_HPP 27 28 #include "memory/allocation.hpp" 29 #include "runtime/handles.hpp" 30 31 // NativeLookup provides an interface for finding DLL entry points for 32 // Java native functions. 33 34 class NativeLookup : AllStatic { 35 private: 36 // JNI name computation 37 static char* pure_jni_name(const methodHandle& method); 38 static char* long_jni_name(const methodHandle& method); 39 static char* critical_jni_name(const methodHandle& method); 40 41 // Style specific lookup 42 static address lookup_style(const methodHandle& method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS); 43 static address lookup_critical_style(void* dll, const char* pure_name, const char* long_name, int args_size, bool os_style); 44 static address lookup_critical_style(void* dll, const methodHandle& method, int args_size); 45 static address lookup_base (const methodHandle& method, bool& in_base_library, TRAPS); 46 static address lookup_entry(const methodHandle& method, bool& in_base_library, TRAPS); 47 static address lookup_entry_prefixed(const methodHandle& method, bool& in_base_library, TRAPS); 48 49 static void* dll_load(const methodHandle& method); 50 static const char* compute_complete_jni_name(const char* pure_name, const char* long_name, int args_size, bool os_style); 51 public: 52 // Lookup native function. May throw UnsatisfiedLinkError. 53 static address lookup(const methodHandle& method, bool& in_base_library, TRAPS); 54 static address lookup_critical_entry(const methodHandle& method); 55 56 // Lookup native functions in base library. 57 static address base_library_lookup(const char* class_name, const char* method_name, const char* signature); 58 }; 59 60 #endif // SHARE_VM_PRIMS_NATIVELOOKUP_HPP 61