/* * 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 "classfile/symbolTable.hpp" #include "jvmci/jvmciJavaClasses.hpp" #include "memory/resourceArea.hpp" #include "oops/oop.inline.hpp" #include "runtime/jniHandles.inline.hpp" // This macro expands for non-inline functions, in class declarations. #define START_CLASS(name) \ void name::check(oop obj, const char* field_name, int offset) { \ assert(obj != NULL, "NULL field access of %s.%s", #name, field_name); \ assert(obj->is_a(SystemDictionary::name##_klass()), "wrong class, " #name " expected, found %s", obj->klass()->external_name()); \ assert(offset != 0, "must be valid offset"); \ } #define END_CLASS #define FIELD(klass, name, type, accessor, cast) \ type klass::name(jobject obj) { check(JNIHandles::resolve(obj), #name, _##name##_offset); return cast JNIHandles::resolve(obj)->accessor(_##name##_offset); } \ void klass::set_##name(jobject obj, type x) { check(JNIHandles::resolve(obj), #name, _##name##_offset); JNIHandles::resolve(obj)->accessor##_put(_##name##_offset, x); } #define EMPTY_CAST #define CHAR_FIELD(klass, name) FIELD(klass, name, jchar, char_field, EMPTY_CAST) #define INT_FIELD(klass, name) FIELD(klass, name, jint, int_field, EMPTY_CAST) #define BOOLEAN_FIELD(klass, name) FIELD(klass, name, jboolean, bool_field, EMPTY_CAST) #define LONG_FIELD(klass, name) FIELD(klass, name, jlong, long_field, EMPTY_CAST) #define FLOAT_FIELD(klass, name) FIELD(klass, name, jfloat, float_field, EMPTY_CAST) #define OOP_FIELD(klass, name, signature) FIELD(klass, name, oop, obj_field, EMPTY_CAST) #define OBJARRAYOOP_FIELD(klass, name, signature) FIELD(klass, name, objArrayOop, obj_field, (objArrayOop)) #define TYPEARRAYOOP_FIELD(klass, name, signature) FIELD(klass, name, typeArrayOop, obj_field, (typeArrayOop)) #define STATIC_OOP_FIELD(klassName, name, signature) STATIC_OOPISH_FIELD(klassName, name, oop, signature) #define STATIC_OBJARRAYOOP_FIELD(klassName, name, signature) STATIC_OOPISH_FIELD(klassName, name, objArrayOop, signature) #define STATIC_OOPISH_FIELD(klassName, name, type, signature) \ type klassName::name() { \ assert(klassName::klass() != NULL && klassName::klass()->is_linked(), "Class not yet linked: " #klassName); \ InstanceKlass* ik = klassName::klass(); \ oop base = ik->static_field_base_raw(); \ oop result = HeapAccess<>::oop_load_at(base, _##name##_offset); \ return type(result); \ } \ void klassName::set_##name(type x) { \ assert(klassName::klass() != NULL && klassName::klass()->is_linked(), "Class not yet linked: " #klassName); \ assert(klassName::klass() != NULL, "Class not yet loaded: " #klassName); \ InstanceKlass* ik = klassName::klass(); \ oop base = ik->static_field_base_raw(); \ HeapAccess<>::oop_store_at(base, _##name##_offset, x); \ } #define STATIC_PRIMITIVE_FIELD(klassName, name, jtypename) \ jtypename klassName::name() { \ assert(klassName::klass() != NULL && klassName::klass()->is_linked(), "Class not yet linked: " #klassName); \ InstanceKlass* ik = klassName::klass(); \ oop base = ik->static_field_base_raw(); \ return HeapAccess<>::load_at(base, _##name##_offset); \ } \ void klassName::set_##name(jtypename x) { \ assert(klassName::klass() != NULL && klassName::klass()->is_linked(), "Class not yet linked: " #klassName); \ InstanceKlass* ik = klassName::klass(); \ oop base = ik->static_field_base_raw(); \ HeapAccess<>::store_at(base, _##name##_offset, x); \ } #define STATIC_INT_FIELD(klassName, name) STATIC_PRIMITIVE_FIELD(klassName, name, jint) #define STATIC_BOOLEAN_FIELD(klassName, name) STATIC_PRIMITIVE_FIELD(klassName, name, jboolean) COMPILER_CLASSES_DO(START_CLASS, END_CLASS, CHAR_FIELD, INT_FIELD, BOOLEAN_FIELD, LONG_FIELD, FLOAT_FIELD, OOP_FIELD, TYPEARRAYOOP_FIELD, OBJARRAYOOP_FIELD, STATIC_OOP_FIELD, STATIC_OBJARRAYOOP_FIELD, STATIC_INT_FIELD, STATIC_BOOLEAN_FIELD) #undef START_CLASS #undef END_CLASS #undef FIELD #undef CHAR_FIELD #undef INT_FIELD #undef BOOLEAN_FIELD #undef LONG_FIELD #undef FLOAT_FIELD #undef OOP_FIELD #undef TYPEARRAYOOP_FIELD #undef OBJARRAYOOP_FIELD #undef STATIC_OOPISH_FIELD #undef STATIC_OOP_FIELD #undef STATIC_OBJARRAYOOP_FIELD #undef STATIC_INT_FIELD #undef STATIC_BOOLEAN_FIELD #undef STATIC_PRIMITIVE_FIELD #undef EMPTY_CAST // 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)