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annotate src/share/vm/jvmci/jvmciJavaClasses.cpp @ 23992:1b8892b4ce9c

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lazily cache the name of a HotSpotResolvedJavaMethodImpl
author Doug Simon <doug.simon@oracle.com>
date Tue, 31 Jan 2017 16:44:20 +0100
parents c5dfcc7bdfaf
children
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1 /*
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2 * Copyright (c) 2011, 2012 Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 #include "precompiled.hpp"
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25 #include "utilities/exceptions.hpp"
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26 #include "jvmci/jvmciJavaClasses.hpp"
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27 #include "runtime/jniHandles.hpp"
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28 #include "classfile/symbolTable.hpp"
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29
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30 // This function is similar to javaClasses.cpp, it computes the field offset of a (static or instance) field.
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31 // It looks up the name and signature symbols without creating new ones, all the symbols of these classes need to be already loaded.
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32
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33 void compute_offset(int &dest_offset, Klass* klass, const char* name, const char* signature, bool static_field, TRAPS) {
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34 InstanceKlass* ik = InstanceKlass::cast(klass);
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35 Symbol* name_symbol = SymbolTable::probe(name, (int)strlen(name));
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36 Symbol* signature_symbol = SymbolTable::probe(signature, (int)strlen(signature));
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37 if (name_symbol == NULL || signature_symbol == NULL) {
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38 #ifndef PRODUCT
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39 ik->print_on(tty);
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40 #endif
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41 fatal(err_msg("symbol with name %s and signature %s was not found in symbol table (klass=%s)", name, signature, klass->name()->as_C_string()));
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42 }
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43
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44 fieldDescriptor fd;
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45 if (!ik->find_field(name_symbol, signature_symbol, &fd)) {
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46 ResourceMark rm;
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47 fatal(err_msg("Invalid layout of %s at %s", name_symbol->as_C_string(), ik->external_name()));
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48 }
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49 guarantee(fd.is_static() == static_field, "static/instance mismatch");
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50 dest_offset = fd.offset();
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51 assert(dest_offset != 0, "must be valid offset");
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52 if (static_field) {
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53 // Must ensure classes for static fields are initialized as the
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54 // accessor itself does not include a class initialization check.
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55 ik->initialize(CHECK);
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56 }
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57 }
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58
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59 // This piece of macro magic creates the contents of the jvmci_compute_offsets method that initializes the field indices of all the access classes.
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60
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61 #define START_CLASS(name) { Klass* k = SystemDictionary::name##_klass(); assert(k != NULL, "Could not find class " #name "");
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62
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63 #define END_CLASS }
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64
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65 #define FIELD(klass, name, signature, static_field) compute_offset(klass::_##name##_offset, k, #name, signature, static_field, CHECK);
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66 #define CHAR_FIELD(klass, name) FIELD(klass, name, "C", false)
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67 #define INT_FIELD(klass, name) FIELD(klass, name, "I", false)
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68 #define BOOLEAN_FIELD(klass, name) FIELD(klass, name, "Z", false)
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69 #define LONG_FIELD(klass, name) FIELD(klass, name, "J", false)
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70 #define FLOAT_FIELD(klass, name) FIELD(klass, name, "F", false)
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71 #define OOP_FIELD(klass, name, signature) FIELD(klass, name, signature, false)
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72 #define STATIC_OOP_FIELD(klass, name, signature) FIELD(klass, name, signature, true)
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73 #define STATIC_INT_FIELD(klass, name) FIELD(klass, name, "I", true)
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74 #define STATIC_BOOLEAN_FIELD(klass, name) FIELD(klass, name, "Z", true)
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75
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76
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77 void JVMCIJavaClasses::compute_offsets(TRAPS) {
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78 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)
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79 }
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80
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81 #define EMPTY0
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82 #define EMPTY1(x)
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83 #define EMPTY2(x,y)
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84 #define FIELD2(klass, name) int klass::_##name##_offset = 0;
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85 #define FIELD3(klass, name, sig) FIELD2(klass, name)
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86
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87 COMPILER_CLASSES_DO(EMPTY1, EMPTY0, FIELD2, FIELD2, FIELD2, FIELD2, FIELD2, FIELD3, FIELD3, FIELD3, FIELD3, FIELD3, FIELD2, FIELD2)
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