| /* |
| * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "precompiled.hpp" |
| #include "jvmci/jvmciJavaClasses.hpp" |
| #include "runtime/jniHandles.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "memory/resourceArea.hpp" |
| |
| // This function is similar to javaClasses.cpp, it computes the field offset of a (static or instance) field. |
| // It looks up the name and signature symbols without creating new ones, all the symbols of these classes need to be already loaded. |
| |
| void compute_offset(int &dest_offset, Klass* klass, const char* name, const char* signature, bool static_field, TRAPS) { |
| InstanceKlass* ik = InstanceKlass::cast(klass); |
| Symbol* name_symbol = SymbolTable::probe(name, (int)strlen(name)); |
| Symbol* signature_symbol = SymbolTable::probe(signature, (int)strlen(signature)); |
| if (name_symbol == NULL || signature_symbol == NULL) { |
| #ifndef PRODUCT |
| ik->print_on(tty); |
| #endif |
| fatal("symbol with name %s and signature %s was not found in symbol table (klass=%s)", name, signature, klass->name()->as_C_string()); |
| } |
| |
| fieldDescriptor fd; |
| if (!ik->find_field(name_symbol, signature_symbol, &fd)) { |
| ResourceMark rm; |
| fatal("Invalid layout of %s %s at %s", name_symbol->as_C_string(), signature_symbol->as_C_string(), ik->external_name()); |
| } |
| guarantee(fd.is_static() == static_field, "static/instance mismatch"); |
| dest_offset = fd.offset(); |
| assert(dest_offset != 0, "must be valid offset"); |
| if (static_field) { |
| // Must ensure classes for static fields are initialized as the |
| // accessor itself does not include a class initialization check. |
| ik->initialize(CHECK); |
| } |
| } |
| |
| // This piece of macro magic creates the contents of the jvmci_compute_offsets method that initializes the field indices of all the access classes. |
| |
| #define START_CLASS(name) { Klass* k = SystemDictionary::name##_klass(); assert(k != NULL, "Could not find class " #name ""); |
| |
| #define END_CLASS } |
| |
| #define FIELD(klass, name, signature, static_field) compute_offset(klass::_##name##_offset, k, #name, signature, static_field, CHECK); |
| #define CHAR_FIELD(klass, name) FIELD(klass, name, "C", false) |
| #define INT_FIELD(klass, name) FIELD(klass, name, "I", false) |
| #define BOOLEAN_FIELD(klass, name) FIELD(klass, name, "Z", false) |
| #define LONG_FIELD(klass, name) FIELD(klass, name, "J", false) |
| #define FLOAT_FIELD(klass, name) FIELD(klass, name, "F", false) |
| #define OOP_FIELD(klass, name, signature) FIELD(klass, name, signature, false) |
| #define STATIC_OOP_FIELD(klass, name, signature) FIELD(klass, name, signature, true) |
| #define STATIC_INT_FIELD(klass, name) FIELD(klass, name, "I", true) |
| #define STATIC_BOOLEAN_FIELD(klass, name) FIELD(klass, name, "Z", true) |
| |
| |
| void JVMCIJavaClasses::compute_offsets(TRAPS) { |
| COMPILER_CLASSES_DO(START_CLASS, END_CLASS, CHAR_FIELD, INT_FIELD, BOOLEAN_FIELD, LONG_FIELD, FLOAT_FIELD, OOP_FIELD, OOP_FIELD, OOP_FIELD, STATIC_OOP_FIELD, STATIC_OOP_FIELD, STATIC_INT_FIELD, STATIC_BOOLEAN_FIELD) |
| } |
| |
| #define EMPTY0 |
| #define EMPTY1(x) |
| #define EMPTY2(x,y) |
| #define FIELD2(klass, name) int klass::_##name##_offset = 0; |
| #define FIELD3(klass, name, sig) FIELD2(klass, name) |
| |
| COMPILER_CLASSES_DO(EMPTY1, EMPTY0, FIELD2, FIELD2, FIELD2, FIELD2, FIELD2, FIELD3, FIELD3, FIELD3, FIELD3, FIELD3, FIELD2, FIELD2) |
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