Mercurial > hg > graal-compiler

annotate src/share/vm/interpreter/rewriter.cpp @ 7154:5d0bb7d52783

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changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
author Doug Simon <doug.simon@oracle.com>
date Wed, 12 Dec 2012 21:36:40 +0100
parents e522a00b91aa
children 989155e2d07a
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1 /*
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2 * Copyright (c) 1998, 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
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25 #include "precompiled.hpp"
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26 #include "interpreter/bytecodes.hpp"
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27 #include "interpreter/interpreter.hpp"
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28 #include "interpreter/rewriter.hpp"
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29 #include "memory/gcLocker.hpp"
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30 #include "memory/metadataFactory.hpp"
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31 #include "memory/oopFactory.hpp"
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32 #include "memory/resourceArea.hpp"
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33 #include "oops/generateOopMap.hpp"
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34 #include "oops/objArrayOop.hpp"
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35 #include "oops/oop.inline.hpp"
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36 #include "prims/methodComparator.hpp"
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37 #include "prims/methodHandles.hpp"
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38
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39 // Computes a CPC map (new_index -> original_index) for constant pool entries
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40 // that are referred to by the interpreter at runtime via the constant pool cache.
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41 // Also computes a CP map (original_index -> new_index).
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42 // Marks entries in CP which require additional processing.
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43 void Rewriter::compute_index_maps() {
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44 const int length = _pool->length();
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45 init_maps(length);
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46 bool saw_mh_symbol = false;
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47 for (int i = 0; i < length; i++) {
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48 int tag = _pool->tag_at(i).value();
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49 switch (tag) {
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50 case JVM_CONSTANT_InterfaceMethodref:
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51 case JVM_CONSTANT_Fieldref : // fall through
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52 case JVM_CONSTANT_Methodref : // fall through
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53 add_cp_cache_entry(i);
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54 break;
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55 case JVM_CONSTANT_String:
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56 case JVM_CONSTANT_Object:
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57 case JVM_CONSTANT_MethodHandle : // fall through
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58 case JVM_CONSTANT_MethodType : // fall through
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59 add_resolved_references_entry(i);
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60 break;
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61 case JVM_CONSTANT_Utf8:
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62 if (_pool->symbol_at(i) == vmSymbols::java_lang_invoke_MethodHandle())
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63 saw_mh_symbol = true;
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64 break;
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65 }
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66 }
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67
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68 // Record limits of resolved reference map for constant pool cache indices
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69 record_map_limits();
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70
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71 guarantee((int)_cp_cache_map.length()-1 <= (int)((u2)-1),
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72 "all cp cache indexes fit in a u2");
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73
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74 if (saw_mh_symbol)
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75 _method_handle_invokers.initialize(length, (int)0);
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76 }
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77
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78 // Unrewrite the bytecodes if an error occurs.
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79 void Rewriter::restore_bytecodes() {
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80 int len = _methods->length();
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81
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82 for (int i = len-1; i >= 0; i--) {
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83 Method* method = _methods->at(i);
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84 scan_method(method, true);
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85 }
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86 }
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87
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88 // Creates a constant pool cache given a CPC map
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89 void Rewriter::make_constant_pool_cache(TRAPS) {
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90 const int length = _cp_cache_map.length();
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91 ClassLoaderData* loader_data = _pool->pool_holder()->class_loader_data();
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92 ConstantPoolCache* cache =
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93 ConstantPoolCache::allocate(loader_data, length, CHECK);
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94
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95 // initialize object cache in constant pool
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96 _pool->initialize_resolved_references(loader_data, _resolved_references_map,
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97 _resolved_reference_limit,
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98 CHECK);
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99
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100 No_Safepoint_Verifier nsv;
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101 cache->initialize(_cp_cache_map, _invokedynamic_references_map);
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102 _pool->set_cache(cache);
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103 cache->set_constant_pool(_pool());
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104 }
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105
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106
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107
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108 // The new finalization semantics says that registration of
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109 // finalizable objects must be performed on successful return from the
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110 // Object.<init> constructor. We could implement this trivially if
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111 // <init> were never rewritten but since JVMTI allows this to occur, a
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112 // more complicated solution is required. A special return bytecode
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113 // is used only by Object.<init> to signal the finalization
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114 // registration point. Additionally local 0 must be preserved so it's
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115 // available to pass to the registration function. For simplicty we
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116 // require that local 0 is never overwritten so it's available as an
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117 // argument for registration.
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118
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119 void Rewriter::rewrite_Object_init(methodHandle method, TRAPS) {
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120 RawBytecodeStream bcs(method);
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121 while (!bcs.is_last_bytecode()) {
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122 Bytecodes::Code opcode = bcs.raw_next();
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123 switch (opcode) {
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124 case Bytecodes::_return:
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125 *bcs.bcp() = Bytecodes::_return_register_finalizer;
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126 break;
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127
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128 case Bytecodes::_istore:
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129 case Bytecodes::_lstore:
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130 case Bytecodes::_fstore:
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131 case Bytecodes::_dstore:
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132 case Bytecodes::_astore:
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133 if (bcs.get_index() != 0) continue;
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134
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135 // fall through
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136 case Bytecodes::_istore_0:
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137 case Bytecodes::_lstore_0:
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138 case Bytecodes::_fstore_0:
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139 case Bytecodes::_dstore_0:
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140 case Bytecodes::_astore_0:
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141 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
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142 "can't overwrite local 0 in Object.<init>");
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143 break;
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144 }
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145 }
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146 }
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147
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148
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149 // Rewrite a classfile-order CP index into a native-order CPC index.
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150 void Rewriter::rewrite_member_reference(address bcp, int offset, bool reverse) {
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151 address p = bcp + offset;
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152 if (!reverse) {
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153 int cp_index = Bytes::get_Java_u2(p);
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154 int cache_index = cp_entry_to_cp_cache(cp_index);
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155 Bytes::put_native_u2(p, cache_index);
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156 if (!_method_handle_invokers.is_empty())
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157 maybe_rewrite_invokehandle(p - 1, cp_index, cache_index, reverse);
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158 } else {
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159 int cache_index = Bytes::get_native_u2(p);
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160 int pool_index = cp_cache_entry_pool_index(cache_index);
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161 Bytes::put_Java_u2(p, pool_index);
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162 if (!_method_handle_invokers.is_empty())
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163 maybe_rewrite_invokehandle(p - 1, pool_index, cache_index, reverse);
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164 }
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165 }
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167
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168 // Adjust the invocation bytecode for a signature-polymorphic method (MethodHandle.invoke, etc.)
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169 void Rewriter::maybe_rewrite_invokehandle(address opc, int cp_index, int cache_index, bool reverse) {
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170 if (!reverse) {
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171 if ((*opc) == (u1)Bytecodes::_invokevirtual ||
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172 // allow invokespecial as an alias, although it would be very odd:
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173 (*opc) == (u1)Bytecodes::_invokespecial) {
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174 assert(_pool->tag_at(cp_index).is_method(), "wrong index");
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175 // Determine whether this is a signature-polymorphic method.
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176 if (cp_index >= _method_handle_invokers.length()) return;
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177 int status = _method_handle_invokers[cp_index];
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178 assert(status >= -1 && status <= 1, "oob tri-state");
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179 if (status == 0) {
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180 if (_pool->klass_ref_at_noresolve(cp_index) == vmSymbols::java_lang_invoke_MethodHandle() &&
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181 MethodHandles::is_signature_polymorphic_name(SystemDictionary::MethodHandle_klass(),
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182 _pool->name_ref_at(cp_index))) {
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183 // we may need a resolved_refs entry for the appendix
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184 add_invokedynamic_resolved_references_entries(cp_index, cache_index);
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185 status = +1;
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186 } else {
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187 status = -1;
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188 }
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189 _method_handle_invokers[cp_index] = status;
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190 }
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191 // We use a special internal bytecode for such methods (if non-static).
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192 // The basic reason for this is that such methods need an extra "appendix" argument
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193 // to transmit the call site's intended call type.
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194 if (status > 0) {
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195 (*opc) = (u1)Bytecodes::_invokehandle;
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196 }
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197 }
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198 } else {
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199 // Do not need to look at cp_index.
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200 if ((*opc) == (u1)Bytecodes::_invokehandle) {
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201 (*opc) = (u1)Bytecodes::_invokevirtual;
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202 // Ignore corner case of original _invokespecial instruction.
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203 // This is safe because (a) the signature polymorphic method was final, and
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204 // (b) the implementation of MethodHandle will not call invokespecial on it.
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205 }
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206 }
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207 }
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208
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209
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210 void Rewriter::rewrite_invokedynamic(address bcp, int offset, bool reverse) {
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211 address p = bcp + offset;
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212 assert(p[-1] == Bytecodes::_invokedynamic, "not invokedynamic bytecode");
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213 if (!reverse) {
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214 int cp_index = Bytes::get_Java_u2(p);
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215 int cache_index = add_invokedynamic_cp_cache_entry(cp_index);
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216 add_invokedynamic_resolved_references_entries(cp_index, cache_index);
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217 // Replace the trailing four bytes with a CPC index for the dynamic
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218 // call site. Unlike other CPC entries, there is one per bytecode,
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219 // not just one per distinct CP entry. In other words, the
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220 // CPC-to-CP relation is many-to-one for invokedynamic entries.
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221 // This means we must use a larger index size than u2 to address
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222 // all these entries. That is the main reason invokedynamic
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223 // must have a five-byte instruction format. (Of course, other JVM
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224 // implementations can use the bytes for other purposes.)
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225 Bytes::put_native_u4(p, ConstantPool::encode_invokedynamic_index(cache_index));
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226 // Note: We use native_u4 format exclusively for 4-byte indexes.
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227 } else {
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228 // callsite index
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229 int cache_index = ConstantPool::decode_invokedynamic_index(
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230 Bytes::get_native_u4(p));
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231 int cp_index = cp_cache_entry_pool_index(cache_index);
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232 assert(_pool->tag_at(cp_index).is_invoke_dynamic(), "wrong index");
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233 // zero out 4 bytes
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234 Bytes::put_Java_u4(p, 0);
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235 Bytes::put_Java_u2(p, cp_index);
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236 }
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237 }
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238
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239
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240 // Rewrite some ldc bytecodes to _fast_aldc
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241 void Rewriter::maybe_rewrite_ldc(address bcp, int offset, bool is_wide,
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242 bool reverse) {
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243 if (!reverse) {
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244 assert((*bcp) == (is_wide ? Bytecodes::_ldc_w : Bytecodes::_ldc), "not ldc bytecode");
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245 address p = bcp + offset;
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246 int cp_index = is_wide ? Bytes::get_Java_u2(p) : (u1)(*p);
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247 constantTag tag = _pool->tag_at(cp_index).value();
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248 if (tag.is_method_handle() || tag.is_method_type() || tag.is_string() || tag.is_object()) {
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249 int ref_index = cp_entry_to_resolved_references(cp_index);
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250 if (is_wide) {
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251 (*bcp) = Bytecodes::_fast_aldc_w;
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252 assert(ref_index == (u2)ref_index, "index overflow");
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253 Bytes::put_native_u2(p, ref_index);
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254 } else {
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255 (*bcp) = Bytecodes::_fast_aldc;
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256 assert(ref_index == (u1)ref_index, "index overflow");
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257 (*p) = (u1)ref_index;
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258 }
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259 }
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260 } else {
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261 Bytecodes::Code rewritten_bc =
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262 (is_wide ? Bytecodes::_fast_aldc_w : Bytecodes::_fast_aldc);
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263 if ((*bcp) == rewritten_bc) {
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264 address p = bcp + offset;
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265 int ref_index = is_wide ? Bytes::get_native_u2(p) : (u1)(*p);
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266 int pool_index = resolved_references_entry_to_pool_index(ref_index);
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267 if (is_wide) {
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268 (*bcp) = Bytecodes::_ldc_w;
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269 assert(pool_index == (u2)pool_index, "index overflow");
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270 Bytes::put_Java_u2(p, pool_index);
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271 } else {
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272 (*bcp) = Bytecodes::_ldc;
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273 assert(pool_index == (u1)pool_index, "index overflow");
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274 (*p) = (u1)pool_index;
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275 }
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276 }
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277 }
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278 }
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279
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280
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281 // Rewrites a method given the index_map information
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282 void Rewriter::scan_method(Method* method, bool reverse) {
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283
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284 int nof_jsrs = 0;
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285 bool has_monitor_bytecodes = false;
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286
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287 {
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288 // We cannot tolerate a GC in this block, because we've
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289 // cached the bytecodes in 'code_base'. If the Method*
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290 // moves, the bytecodes will also move.
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291 No_Safepoint_Verifier nsv;
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292 Bytecodes::Code c;
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293
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294 // Bytecodes and their length
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295 const address code_base = method->code_base();
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296 const int code_length = method->code_size();
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297
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298 int bc_length;
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299 for (int bci = 0; bci < code_length; bci += bc_length) {
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300 address bcp = code_base + bci;
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301 int prefix_length = 0;
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302 c = (Bytecodes::Code)(*bcp);
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303
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304 // Since we have the code, see if we can get the length
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305 // directly. Some more complicated bytecodes will report
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306 // a length of zero, meaning we need to make another method
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307 // call to calculate the length.
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308 bc_length = Bytecodes::length_for(c);
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309 if (bc_length == 0) {
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310 bc_length = Bytecodes::length_at(method, bcp);
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311
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312 // length_at will put us at the bytecode after the one modified
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313 // by 'wide'. We don't currently examine any of the bytecodes
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314 // modified by wide, but in case we do in the future...
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315 if (c == Bytecodes::_wide) {
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316 prefix_length = 1;
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317 c = (Bytecodes::Code)bcp[1];
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318 }
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319 }
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320
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321 assert(bc_length != 0, "impossible bytecode length");
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parents:
diff changeset
322
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parents:
diff changeset
323 switch (c) {
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parents:
diff changeset
324 case Bytecodes::_lookupswitch : {
a61af66fc99e Initial load
duke
parents:
diff changeset
325 #ifndef CC_INTERP
2181
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents: 2044 2142
diff changeset
326 Bytecode_lookupswitch bc(method, bcp);
1930
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents: 1433 1660
diff changeset
327 (*bcp) = (
2181
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents: 2044 2142
diff changeset
328 bc.number_of_pairs() < BinarySwitchThreshold
1423
760213a60e8b * rewrite of the code installation
Lukas Stadler <lukas.stadler@oracle.com>
parents: 1138
diff changeset
329 ? Bytecodes::_fast_linearswitch
760213a60e8b * rewrite of the code installation
Lukas Stadler <lukas.stadler@oracle.com>
parents: 1138
diff changeset
330 : Bytecodes::_fast_binaryswitch
760213a60e8b * rewrite of the code installation
Lukas Stadler <lukas.stadler@oracle.com>
parents: 1138
diff changeset
331 );
4559
723df37192d6 Make it possible again to build a real client libjvm, drop the UseGraal flag.
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 4138
diff changeset
332 #endif
0
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parents:
diff changeset
333 break;
a61af66fc99e Initial load
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parents:
diff changeset
334 }
3404
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coleenp
parents: 2460
diff changeset
335 case Bytecodes::_fast_linearswitch:
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
336 case Bytecodes::_fast_binaryswitch: {
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
337 #ifndef CC_INTERP
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
338 (*bcp) = Bytecodes::_lookupswitch;
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
339 #endif
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
340 break;
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
341 }
0
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parents:
diff changeset
342 case Bytecodes::_getstatic : // fall through
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parents:
diff changeset
343 case Bytecodes::_putstatic : // fall through
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parents:
diff changeset
344 case Bytecodes::_getfield : // fall through
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parents:
diff changeset
345 case Bytecodes::_putfield : // fall through
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parents:
diff changeset
346 case Bytecodes::_invokevirtual : // fall through
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parents:
diff changeset
347 case Bytecodes::_invokespecial : // fall through
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
348 case Bytecodes::_invokestatic :
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jrose
parents: 579
diff changeset
349 case Bytecodes::_invokeinterface:
6266
1d7922586cf6 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 3404
diff changeset
350 case Bytecodes::_invokehandle : // if reverse=true
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
351 rewrite_member_reference(bcp, prefix_length+1, reverse);
0
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parents:
diff changeset
352 break;
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
353 case Bytecodes::_invokedynamic:
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
354 rewrite_invokedynamic(bcp, prefix_length+1, reverse);
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
355 break;
1602
136b78722a08 6939203: JSR 292 needs method handle constants
jrose
parents: 1579
diff changeset
356 case Bytecodes::_ldc:
6266
1d7922586cf6 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 3404
diff changeset
357 case Bytecodes::_fast_aldc: // if reverse=true
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
358 maybe_rewrite_ldc(bcp, prefix_length+1, false, reverse);
1602
136b78722a08 6939203: JSR 292 needs method handle constants
jrose
parents: 1579
diff changeset
359 break;
136b78722a08 6939203: JSR 292 needs method handle constants
jrose
parents: 1579
diff changeset
360 case Bytecodes::_ldc_w:
6266
1d7922586cf6 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 3404
diff changeset
361 case Bytecodes::_fast_aldc_w: // if reverse=true
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
362 maybe_rewrite_ldc(bcp, prefix_length+1, true, reverse);
1602
136b78722a08 6939203: JSR 292 needs method handle constants
jrose
parents: 1579
diff changeset
363 break;
0
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duke
parents:
diff changeset
364 case Bytecodes::_jsr : // fall through
a61af66fc99e Initial load
duke
parents:
diff changeset
365 case Bytecodes::_jsr_w : nof_jsrs++; break;
a61af66fc99e Initial load
duke
parents:
diff changeset
366 case Bytecodes::_monitorenter : // fall through
a61af66fc99e Initial load
duke
parents:
diff changeset
367 case Bytecodes::_monitorexit : has_monitor_bytecodes = true; break;
a61af66fc99e Initial load
duke
parents:
diff changeset
368 }
a61af66fc99e Initial load
duke
parents:
diff changeset
369 }
a61af66fc99e Initial load
duke
parents:
diff changeset
370 }
a61af66fc99e Initial load
duke
parents:
diff changeset
371
a61af66fc99e Initial load
duke
parents:
diff changeset
372 // Update access flags
a61af66fc99e Initial load
duke
parents:
diff changeset
373 if (has_monitor_bytecodes) {
a61af66fc99e Initial load
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parents:
diff changeset
374 method->set_has_monitor_bytecodes();
a61af66fc99e Initial load
duke
parents:
diff changeset
375 }
a61af66fc99e Initial load
duke
parents:
diff changeset
376
a61af66fc99e Initial load
duke
parents:
diff changeset
377 // The present of a jsr bytecode implies that the method might potentially
a61af66fc99e Initial load
duke
parents:
diff changeset
378 // have to be rewritten, so we run the oopMapGenerator on the method
a61af66fc99e Initial load
duke
parents:
diff changeset
379 if (nof_jsrs > 0) {
a61af66fc99e Initial load
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parents:
diff changeset
380 method->set_has_jsrs();
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
381 // Second pass will revisit this method.
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
382 assert(method->has_jsrs(), "didn't we just set this?");
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
383 }
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
384 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
385
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
386 // After constant pool is created, revisit methods containing jsrs.
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
387 methodHandle Rewriter::rewrite_jsrs(methodHandle method, TRAPS) {
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
388 ResourceMark rm(THREAD);
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
389 ResolveOopMapConflicts romc(method);
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
390 methodHandle original_method = method;
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
391 method = romc.do_potential_rewrite(CHECK_(methodHandle()));
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
392 // Update monitor matching info.
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
393 if (romc.monitor_safe()) {
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
394 method->set_guaranteed_monitor_matching();
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
395 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
396
a61af66fc99e Initial load
duke
parents:
diff changeset
397 return method;
a61af66fc99e Initial load
duke
parents:
diff changeset
398 }
a61af66fc99e Initial load
duke
parents:
diff changeset
399
a61af66fc99e Initial load
duke
parents:
diff changeset
400 void Rewriter::rewrite(instanceKlassHandle klass, TRAPS) {
a61af66fc99e Initial load
duke
parents:
diff changeset
401 ResourceMark rm(THREAD);
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
402 Rewriter rw(klass, klass->constants(), klass->methods(), CHECK);
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
403 // (That's all, folks.)
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
404 }
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
405
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
406
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
407 void Rewriter::rewrite(instanceKlassHandle klass, constantPoolHandle cpool, Array<Method*>* methods, TRAPS) {
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
408 ResourceMark rm(THREAD);
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
409 Rewriter rw(klass, cpool, methods, CHECK);
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
410 // (That's all, folks.)
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
411 }
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
412
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
413
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
414 Rewriter::Rewriter(instanceKlassHandle klass, constantPoolHandle cpool, Array<Method*>* methods, TRAPS)
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
415 : _klass(klass),
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
416 _pool(cpool),
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
417 _methods(methods)
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
418 {
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
419 assert(_pool->cache() == NULL, "constant pool cache must not be set yet");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
420
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
421 // determine index maps for Method* rewriting
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
422 compute_index_maps();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
423
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
424 if (RegisterFinalizersAtInit && _klass->name() == vmSymbols::java_lang_Object()) {
856
75596850f863 6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents: 726
diff changeset
425 bool did_rewrite = false;
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
426 int i = _methods->length();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
427 while (i-- > 0) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
428 Method* method = _methods->at(i);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
429 if (method->intrinsic_id() == vmIntrinsics::_Object_init) {
a61af66fc99e Initial load
duke
parents:
diff changeset
430 // rewrite the return bytecodes of Object.<init> to register the
a61af66fc99e Initial load
duke
parents:
diff changeset
431 // object for finalization if needed.
a61af66fc99e Initial load
duke
parents:
diff changeset
432 methodHandle m(THREAD, method);
a61af66fc99e Initial load
duke
parents:
diff changeset
433 rewrite_Object_init(m, CHECK);
856
75596850f863 6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents: 726
diff changeset
434 did_rewrite = true;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
435 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
436 }
a61af66fc99e Initial load
duke
parents:
diff changeset
437 }
856
75596850f863 6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents: 726
diff changeset
438 assert(did_rewrite, "must find Object::<init> to rewrite it");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
439 }
a61af66fc99e Initial load
duke
parents:
diff changeset
440
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
441 // rewrite methods, in two passes
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
442 int len = _methods->length();
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
443
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
444 for (int i = len-1; i >= 0; i--) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
445 Method* method = _methods->at(i);
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
446 scan_method(method);
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
447 }
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
448
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
449 // allocate constant pool cache, now that we've seen all the bytecodes
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
450 make_constant_pool_cache(THREAD);
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
451
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
452 // Restore bytecodes to their unrewritten state if there are exceptions
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
453 // rewriting bytecodes or allocating the cpCache
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
454 if (HAS_PENDING_EXCEPTION) {
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
455 restore_bytecodes();
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
456 return;
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
457 }
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
458 }
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
459
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
460 // Relocate jsr/rets in a method. This can't be done with the rewriter
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
461 // stage because it can throw other exceptions, leaving the bytecodes
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
462 // pointing at constant pool cache entries.
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
463 // Link and check jvmti dependencies while we're iterating over the methods.
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
464 // JSR292 code calls with a different set of methods, so two entry points.
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
465 void Rewriter::relocate_and_link(instanceKlassHandle this_oop, TRAPS) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
466 relocate_and_link(this_oop, this_oop->methods(), THREAD);
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
467 }
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
468
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
469 void Rewriter::relocate_and_link(instanceKlassHandle this_oop,
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
470 Array<Method*>* methods, TRAPS) {
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
471 int len = methods->length();
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
472 for (int i = len-1; i >= 0; i--) {
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
473 methodHandle m(THREAD, methods->at(i));
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
474
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
475 if (m->has_jsrs()) {
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
476 m = rewrite_jsrs(m, CHECK);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
477 // Method might have gotten rewritten.
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6266
diff changeset
478 methods->at_put(i, m());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
479 }
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
480
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
481 // Set up method entry points for compiler and interpreter .
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
482 m->link_method(m, CHECK);
1574
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
483
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
484 // This is for JVMTI and unrelated to relocator but the last thing we do
1574
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
485 #ifdef ASSERT
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
486 if (StressMethodComparator) {
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
487 static int nmc = 0;
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
488 for (int j = i; j >= 0 && j >= i-4; j--) {
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
489 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc);
3404
2d4b2b833d29 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
490 bool z = MethodComparator::methods_EMCP(m(),
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
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491 methods->at(j));
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492 if (j == i && !z) {
1eb493f33423 6957080: MethodComparator needs stress testing
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493 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes();
1eb493f33423 6957080: MethodComparator needs stress testing
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494 assert(z, "method must compare equal to itself");
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495 }
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496 }
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497 }
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498 #endif //ASSERT
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499 }
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500 }