annotate src/share/vm/interpreter/rewriter.cpp @ 6266:1d7922586cf6

7023639: JSR 292 method handle invocation needs a fast path for compiled code 6984705: JSR 292 method handle creation should not go through JNI Summary: remove assembly code for JDK 7 chained method handles Reviewed-by: jrose, twisti, kvn, mhaupt Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>
author twisti
date Tue, 24 Jul 2012 10:51:00 -0700
parents d3b9f2be46ab
children 957c266d8bc5 da91efe96a93
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1 /*
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2 * Copyright (c) 1998, 2011, 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/oopFactory.hpp"
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31 #include "memory/resourceArea.hpp"
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32 #include "oops/generateOopMap.hpp"
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33 #include "oops/objArrayOop.hpp"
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34 #include "oops/oop.inline.hpp"
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35 #include "prims/methodComparator.hpp"
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36 #include "prims/methodHandles.hpp"
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37
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38 // Computes a CPC map (new_index -> original_index) for constant pool entries
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39 // that are referred to by the interpreter at runtime via the constant pool cache.
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40 // Also computes a CP map (original_index -> new_index).
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41 // Marks entries in CP which require additional processing.
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42 void Rewriter::compute_index_maps() {
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43 const int length = _pool->length();
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44 init_cp_map(length);
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45 bool saw_mh_symbol = false;
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46 for (int i = 0; i < length; i++) {
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47 int tag = _pool->tag_at(i).value();
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48 switch (tag) {
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49 case JVM_CONSTANT_InterfaceMethodref:
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50 case JVM_CONSTANT_Fieldref : // fall through
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51 case JVM_CONSTANT_Methodref : // fall through
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52 case JVM_CONSTANT_MethodHandle : // fall through
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53 case JVM_CONSTANT_MethodType : // fall through
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54 case JVM_CONSTANT_InvokeDynamic : // fall through
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55 add_cp_cache_entry(i);
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56 break;
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57 case JVM_CONSTANT_Utf8:
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58 if (_pool->symbol_at(i) == vmSymbols::java_lang_invoke_MethodHandle())
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59 saw_mh_symbol = true;
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60 break;
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61 }
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62 }
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63
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64 guarantee((int)_cp_cache_map.length()-1 <= (int)((u2)-1),
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65 "all cp cache indexes fit in a u2");
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66
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67 if (saw_mh_symbol)
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68 _method_handle_invokers.initialize(length, (int)0);
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69 }
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70
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71 // Unrewrite the bytecodes if an error occurs.
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72 void Rewriter::restore_bytecodes() {
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73 int len = _methods->length();
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74
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75 for (int i = len-1; i >= 0; i--) {
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76 methodOop method = (methodOop)_methods->obj_at(i);
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77 scan_method(method, true);
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78 }
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79 }
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80
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81 // Creates a constant pool cache given a CPC map
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82 void Rewriter::make_constant_pool_cache(TRAPS) {
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83 const int length = _cp_cache_map.length();
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84 constantPoolCacheOop cache =
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85 oopFactory::new_constantPoolCache(length, CHECK);
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86 No_Safepoint_Verifier nsv;
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87 cache->initialize(_cp_cache_map);
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88 _pool->set_cache(cache);
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89 cache->set_constant_pool(_pool());
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90 }
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91
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92
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93
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94 // The new finalization semantics says that registration of
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95 // finalizable objects must be performed on successful return from the
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96 // Object.<init> constructor. We could implement this trivially if
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97 // <init> were never rewritten but since JVMTI allows this to occur, a
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98 // more complicated solution is required. A special return bytecode
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99 // is used only by Object.<init> to signal the finalization
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100 // registration point. Additionally local 0 must be preserved so it's
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101 // available to pass to the registration function. For simplicty we
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102 // require that local 0 is never overwritten so it's available as an
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103 // argument for registration.
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104
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105 void Rewriter::rewrite_Object_init(methodHandle method, TRAPS) {
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106 RawBytecodeStream bcs(method);
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107 while (!bcs.is_last_bytecode()) {
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108 Bytecodes::Code opcode = bcs.raw_next();
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109 switch (opcode) {
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110 case Bytecodes::_return: *bcs.bcp() = Bytecodes::_return_register_finalizer; break;
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111
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112 case Bytecodes::_istore:
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113 case Bytecodes::_lstore:
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114 case Bytecodes::_fstore:
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115 case Bytecodes::_dstore:
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116 case Bytecodes::_astore:
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117 if (bcs.get_index() != 0) continue;
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118
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119 // fall through
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120 case Bytecodes::_istore_0:
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121 case Bytecodes::_lstore_0:
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122 case Bytecodes::_fstore_0:
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123 case Bytecodes::_dstore_0:
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124 case Bytecodes::_astore_0:
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125 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
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126 "can't overwrite local 0 in Object.<init>");
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127 break;
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128 }
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129 }
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130 }
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131
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132
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133 // Rewrite a classfile-order CP index into a native-order CPC index.
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134 void Rewriter::rewrite_member_reference(address bcp, int offset, bool reverse) {
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135 address p = bcp + offset;
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136 if (!reverse) {
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137 int cp_index = Bytes::get_Java_u2(p);
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138 int cache_index = cp_entry_to_cp_cache(cp_index);
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139 Bytes::put_native_u2(p, cache_index);
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140 if (!_method_handle_invokers.is_empty())
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141 maybe_rewrite_invokehandle(p - 1, cp_index, reverse);
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142 } else {
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143 int cache_index = Bytes::get_native_u2(p);
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144 int pool_index = cp_cache_entry_pool_index(cache_index);
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145 Bytes::put_Java_u2(p, pool_index);
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146 if (!_method_handle_invokers.is_empty())
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147 maybe_rewrite_invokehandle(p - 1, pool_index, reverse);
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148 }
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149 }
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150
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151
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152 // Adjust the invocation bytecode for a signature-polymorphic method (MethodHandle.invoke, etc.)
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153 void Rewriter::maybe_rewrite_invokehandle(address opc, int cp_index, bool reverse) {
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154 if (!reverse) {
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155 if ((*opc) == (u1)Bytecodes::_invokevirtual ||
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156 // allow invokespecial as an alias, although it would be very odd:
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157 (*opc) == (u1)Bytecodes::_invokespecial) {
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158 assert(_pool->tag_at(cp_index).is_method(), "wrong index");
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159 // Determine whether this is a signature-polymorphic method.
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160 if (cp_index >= _method_handle_invokers.length()) return;
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161 int status = _method_handle_invokers[cp_index];
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162 assert(status >= -1 && status <= 1, "oob tri-state");
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163 if (status == 0) {
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164 if (_pool->klass_ref_at_noresolve(cp_index) == vmSymbols::java_lang_invoke_MethodHandle() &&
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165 MethodHandles::is_signature_polymorphic_name(SystemDictionary::MethodHandle_klass(),
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166 _pool->name_ref_at(cp_index)))
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167 status = +1;
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168 else
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169 status = -1;
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170 _method_handle_invokers[cp_index] = status;
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diff changeset
171 }
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172 // We use a special internal bytecode for such methods (if non-static).
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173 // The basic reason for this is that such methods need an extra "appendix" argument
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diff changeset
174 // to transmit the call site's intended call type.
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diff changeset
175 if (status > 0) {
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diff changeset
176 (*opc) = (u1)Bytecodes::_invokehandle;
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177 }
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diff changeset
178 }
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twisti
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diff changeset
179 } else {
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180 // Do not need to look at cp_index.
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diff changeset
181 if ((*opc) == (u1)Bytecodes::_invokehandle) {
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twisti
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diff changeset
182 (*opc) = (u1)Bytecodes::_invokevirtual;
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183 // Ignore corner case of original _invokespecial instruction.
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184 // This is safe because (a) the signature polymorphic method was final, and
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185 // (b) the implementation of MethodHandle will not call invokespecial on it.
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diff changeset
186 }
3748
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diff changeset
187 }
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188 }
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189
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diff changeset
190
3748
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diff changeset
191 void Rewriter::rewrite_invokedynamic(address bcp, int offset, bool reverse) {
726
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192 address p = bcp + offset;
3748
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diff changeset
193 assert(p[-1] == Bytecodes::_invokedynamic, "not invokedynamic bytecode");
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diff changeset
194 if (!reverse) {
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diff changeset
195 int cp_index = Bytes::get_Java_u2(p);
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diff changeset
196 int cpc = maybe_add_cp_cache_entry(cp_index); // add lazily
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197 int cpc2 = add_secondary_cp_cache_entry(cpc);
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198
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199 // Replace the trailing four bytes with a CPC index for the dynamic
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200 // call site. Unlike other CPC entries, there is one per bytecode,
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diff changeset
201 // not just one per distinct CP entry. In other words, the
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202 // CPC-to-CP relation is many-to-one for invokedynamic entries.
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203 // This means we must use a larger index size than u2 to address
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204 // all these entries. That is the main reason invokedynamic
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diff changeset
205 // must have a five-byte instruction format. (Of course, other JVM
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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206 // implementations can use the bytes for other purposes.)
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207 Bytes::put_native_u4(p, constantPoolCacheOopDesc::encode_secondary_index(cpc2));
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208 // Note: We use native_u4 format exclusively for 4-byte indexes.
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diff changeset
209 } else {
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diff changeset
210 int cache_index = constantPoolCacheOopDesc::decode_secondary_index(
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coleenp
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diff changeset
211 Bytes::get_native_u4(p));
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diff changeset
212 int secondary_index = cp_cache_secondary_entry_main_index(cache_index);
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coleenp
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diff changeset
213 int pool_index = cp_cache_entry_pool_index(secondary_index);
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diff changeset
214 assert(_pool->tag_at(pool_index).is_invoke_dynamic(), "wrong index");
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diff changeset
215 // zero out 4 bytes
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coleenp
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diff changeset
216 Bytes::put_Java_u4(p, 0);
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diff changeset
217 Bytes::put_Java_u2(p, pool_index);
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218 }
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219 }
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220
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221
1602
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222 // Rewrite some ldc bytecodes to _fast_aldc
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
223 void Rewriter::maybe_rewrite_ldc(address bcp, int offset, bool is_wide,
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
224 bool reverse) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
225 if (!reverse) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
226 assert((*bcp) == (is_wide ? Bytecodes::_ldc_w : Bytecodes::_ldc), "not ldc bytecode");
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diff changeset
227 address p = bcp + offset;
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diff changeset
228 int cp_index = is_wide ? Bytes::get_Java_u2(p) : (u1)(*p);
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
229 constantTag tag = _pool->tag_at(cp_index).value();
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diff changeset
230 if (tag.is_method_handle() || tag.is_method_type()) {
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diff changeset
231 int cache_index = cp_entry_to_cp_cache(cp_index);
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diff changeset
232 if (is_wide) {
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diff changeset
233 (*bcp) = Bytecodes::_fast_aldc_w;
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diff changeset
234 assert(cache_index == (u2)cache_index, "index overflow");
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diff changeset
235 Bytes::put_native_u2(p, cache_index);
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coleenp
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diff changeset
236 } else {
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coleenp
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diff changeset
237 (*bcp) = Bytecodes::_fast_aldc;
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diff changeset
238 assert(cache_index == (u1)cache_index, "index overflow");
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coleenp
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diff changeset
239 (*p) = (u1)cache_index;
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coleenp
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diff changeset
240 }
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
241 }
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coleenp
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diff changeset
242 } else {
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coleenp
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diff changeset
243 Bytecodes::Code rewritten_bc =
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
244 (is_wide ? Bytecodes::_fast_aldc_w : Bytecodes::_fast_aldc);
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coleenp
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diff changeset
245 if ((*bcp) == rewritten_bc) {
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coleenp
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diff changeset
246 address p = bcp + offset;
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diff changeset
247 int cache_index = is_wide ? Bytes::get_native_u2(p) : (u1)(*p);
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coleenp
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diff changeset
248 int pool_index = cp_cache_entry_pool_index(cache_index);
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coleenp
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diff changeset
249 if (is_wide) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
250 (*bcp) = Bytecodes::_ldc_w;
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coleenp
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diff changeset
251 assert(pool_index == (u2)pool_index, "index overflow");
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diff changeset
252 Bytes::put_Java_u2(p, pool_index);
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coleenp
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diff changeset
253 } else {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
254 (*bcp) = Bytecodes::_ldc;
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
255 assert(pool_index == (u1)pool_index, "index overflow");
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diff changeset
256 (*p) = (u1)pool_index;
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diff changeset
257 }
1602
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diff changeset
258 }
136b78722a08 6939203: JSR 292 needs method handle constants
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259 }
136b78722a08 6939203: JSR 292 needs method handle constants
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diff changeset
260 }
136b78722a08 6939203: JSR 292 needs method handle constants
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261
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diff changeset
262
0
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parents:
diff changeset
263 // Rewrites a method given the index_map information
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
264 void Rewriter::scan_method(methodOop method, bool reverse) {
0
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265
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266 int nof_jsrs = 0;
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267 bool has_monitor_bytecodes = false;
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268
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269 {
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diff changeset
270 // We cannot tolerate a GC in this block, because we've
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diff changeset
271 // cached the bytecodes in 'code_base'. If the methodOop
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diff changeset
272 // moves, the bytecodes will also move.
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273 No_Safepoint_Verifier nsv;
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diff changeset
274 Bytecodes::Code c;
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275
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diff changeset
276 // Bytecodes and their length
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277 const address code_base = method->code_base();
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278 const int code_length = method->code_size();
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279
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diff changeset
280 int bc_length;
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diff changeset
281 for (int bci = 0; bci < code_length; bci += bc_length) {
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diff changeset
282 address bcp = code_base + bci;
726
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diff changeset
283 int prefix_length = 0;
0
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284 c = (Bytecodes::Code)(*bcp);
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285
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parents:
diff changeset
286 // Since we have the code, see if we can get the length
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parents:
diff changeset
287 // directly. Some more complicated bytecodes will report
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parents:
diff changeset
288 // a length of zero, meaning we need to make another method
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diff changeset
289 // call to calculate the length.
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diff changeset
290 bc_length = Bytecodes::length_for(c);
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parents:
diff changeset
291 if (bc_length == 0) {
2142
8012aa3ccede 4926272: methodOopDesc::method_from_bcp is unsafe
never
parents: 2011
diff changeset
292 bc_length = Bytecodes::length_at(method, bcp);
0
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diff changeset
293
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parents:
diff changeset
294 // length_at will put us at the bytecode after the one modified
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parents:
diff changeset
295 // by 'wide'. We don't currently examine any of the bytecodes
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parents:
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296 // modified by wide, but in case we do in the future...
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diff changeset
297 if (c == Bytecodes::_wide) {
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298 prefix_length = 1;
0
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299 c = (Bytecodes::Code)bcp[1];
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parents:
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300 }
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301 }
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parents:
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302
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parents:
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303 assert(bc_length != 0, "impossible bytecode length");
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304
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diff changeset
305 switch (c) {
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diff changeset
306 case Bytecodes::_lookupswitch : {
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parents:
diff changeset
307 #ifndef CC_INTERP
2142
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never
parents: 2011
diff changeset
308 Bytecode_lookupswitch bc(method, bcp);
1565
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diff changeset
309 (*bcp) = (
2142
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parents: 2011
diff changeset
310 bc.number_of_pairs() < BinarySwitchThreshold
0
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311 ? Bytecodes::_fast_linearswitch
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312 : Bytecodes::_fast_binaryswitch
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313 );
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314 #endif
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315 break;
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parents:
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316 }
3748
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diff changeset
317 case Bytecodes::_fast_linearswitch:
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
318 case Bytecodes::_fast_binaryswitch: {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
319 #ifndef CC_INTERP
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
320 (*bcp) = Bytecodes::_lookupswitch;
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
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diff changeset
321 #endif
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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diff changeset
322 break;
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diff changeset
323 }
0
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parents:
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324 case Bytecodes::_getstatic : // fall through
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325 case Bytecodes::_putstatic : // fall through
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326 case Bytecodes::_getfield : // fall through
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327 case Bytecodes::_putfield : // fall through
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328 case Bytecodes::_invokevirtual : // fall through
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329 case Bytecodes::_invokespecial : // fall through
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330 case Bytecodes::_invokestatic :
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331 case Bytecodes::_invokeinterface:
6266
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332 case Bytecodes::_invokehandle : // if reverse=true
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333 rewrite_member_reference(bcp, prefix_length+1, reverse);
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334 break;
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335 case Bytecodes::_invokedynamic:
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336 rewrite_invokedynamic(bcp, prefix_length+1, reverse);
726
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337 break;
1602
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338 case Bytecodes::_ldc:
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339 case Bytecodes::_fast_aldc: // if reverse=true
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340 maybe_rewrite_ldc(bcp, prefix_length+1, false, reverse);
1602
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341 break;
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342 case Bytecodes::_ldc_w:
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343 case Bytecodes::_fast_aldc_w: // if reverse=true
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344 maybe_rewrite_ldc(bcp, prefix_length+1, true, reverse);
1602
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345 break;
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346 case Bytecodes::_jsr : // fall through
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347 case Bytecodes::_jsr_w : nof_jsrs++; break;
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348 case Bytecodes::_monitorenter : // fall through
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349 case Bytecodes::_monitorexit : has_monitor_bytecodes = true; break;
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350 }
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351 }
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352 }
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353
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354 // Update access flags
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355 if (has_monitor_bytecodes) {
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356 method->set_has_monitor_bytecodes();
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357 }
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358
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359 // The present of a jsr bytecode implies that the method might potentially
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parents:
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360 // have to be rewritten, so we run the oopMapGenerator on the method
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361 if (nof_jsrs > 0) {
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362 method->set_has_jsrs();
726
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363 // Second pass will revisit this method.
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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364 assert(method->has_jsrs(), "didn't we just set this?");
726
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365 }
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366 }
0
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367
726
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368 // After constant pool is created, revisit methods containing jsrs.
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369 methodHandle Rewriter::rewrite_jsrs(methodHandle method, TRAPS) {
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
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370 ResourceMark rm(THREAD);
726
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371 ResolveOopMapConflicts romc(method);
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372 methodHandle original_method = method;
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373 method = romc.do_potential_rewrite(CHECK_(methodHandle()));
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374 if (method() != original_method()) {
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diff changeset
375 // Insert invalid bytecode into original methodOop and set
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376 // interpreter entrypoint, so that a executing this method
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377 // will manifest itself in an easy recognizable form.
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378 address bcp = original_method->bcp_from(0);
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379 *bcp = (u1)Bytecodes::_shouldnotreachhere;
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380 int kind = Interpreter::method_kind(original_method);
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381 original_method->set_interpreter_kind(kind);
0
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382 }
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383
726
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diff changeset
384 // Update monitor matching info.
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diff changeset
385 if (romc.monitor_safe()) {
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diff changeset
386 method->set_guaranteed_monitor_matching();
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387 }
0
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388
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389 return method;
a61af66fc99e Initial load
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390 }
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391
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392 void Rewriter::rewrite(instanceKlassHandle klass, TRAPS) {
a61af66fc99e Initial load
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393 ResourceMark rm(THREAD);
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
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394 Rewriter rw(klass, klass->constants(), klass->methods(), CHECK);
726
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diff changeset
395 // (That's all, folks.)
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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diff changeset
396 }
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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diff changeset
397
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
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diff changeset
398
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399 void Rewriter::rewrite(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS) {
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
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diff changeset
400 ResourceMark rm(THREAD);
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
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diff changeset
401 Rewriter rw(klass, cpool, methods, CHECK);
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
402 // (That's all, folks.)
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
403 }
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
404
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
405
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
406 Rewriter::Rewriter(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS)
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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diff changeset
407 : _klass(klass),
1138
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
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parents: 1059
diff changeset
408 _pool(cpool),
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2
twisti
parents: 1059
diff changeset
409 _methods(methods)
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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diff changeset
410 {
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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parents: 579
diff changeset
411 assert(_pool->cache() == NULL, "constant pool cache must not be set yet");
0
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parents:
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412
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413 // determine index maps for methodOop rewriting
726
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diff changeset
414 compute_index_maps();
0
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parents:
diff changeset
415
726
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diff changeset
416 if (RegisterFinalizersAtInit && _klass->name() == vmSymbols::java_lang_Object()) {
856
75596850f863 6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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parents: 726
diff changeset
417 bool did_rewrite = false;
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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diff changeset
418 int i = _methods->length();
0
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419 while (i-- > 0) {
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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diff changeset
420 methodOop method = (methodOop)_methods->obj_at(i);
0
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parents:
diff changeset
421 if (method->intrinsic_id() == vmIntrinsics::_Object_init) {
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parents:
diff changeset
422 // rewrite the return bytecodes of Object.<init> to register the
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parents:
diff changeset
423 // object for finalization if needed.
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parents:
diff changeset
424 methodHandle m(THREAD, method);
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diff changeset
425 rewrite_Object_init(m, CHECK);
856
75596850f863 6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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diff changeset
426 did_rewrite = true;
0
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parents:
diff changeset
427 break;
a61af66fc99e Initial load
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parents:
diff changeset
428 }
a61af66fc99e Initial load
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parents:
diff changeset
429 }
856
75596850f863 6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents: 726
diff changeset
430 assert(did_rewrite, "must find Object::<init> to rewrite it");
0
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parents:
diff changeset
431 }
a61af66fc99e Initial load
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parents:
diff changeset
432
726
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parents: 579
diff changeset
433 // rewrite methods, in two passes
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
434 int len = _methods->length();
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
435
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
436 for (int i = len-1; i >= 0; i--) {
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
437 methodOop method = (methodOop)_methods->obj_at(i);
be93aad57795 6655646: dynamic languages need dynamically linked call sites
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parents: 579
diff changeset
438 scan_method(method);
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
439 }
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
440
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
441 // allocate constant pool cache, now that we've seen all the bytecodes
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
442 make_constant_pool_cache(THREAD);
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
443
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
444 // Restore bytecodes to their unrewritten state if there are exceptions
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
445 // rewriting bytecodes or allocating the cpCache
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
446 if (HAS_PENDING_EXCEPTION) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
447 restore_bytecodes();
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
448 return;
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
449 }
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
450 }
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
451
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
452 // Relocate jsr/rets in a method. This can't be done with the rewriter
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
453 // stage because it can throw other exceptions, leaving the bytecodes
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
454 // pointing at constant pool cache entries.
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
455 // Link and check jvmti dependencies while we're iterating over the methods.
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
456 // JSR292 code calls with a different set of methods, so two entry points.
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
457 void Rewriter::relocate_and_link(instanceKlassHandle this_oop, TRAPS) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
458 objArrayHandle methods(THREAD, this_oop->methods());
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
459 relocate_and_link(this_oop, methods, THREAD);
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
460 }
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
461
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
462 void Rewriter::relocate_and_link(instanceKlassHandle this_oop,
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
463 objArrayHandle methods, TRAPS) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
464 int len = methods->length();
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
465 for (int i = len-1; i >= 0; i--) {
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
466 methodHandle m(THREAD, (methodOop)methods->obj_at(i));
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
467
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
468 if (m->has_jsrs()) {
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
469 m = rewrite_jsrs(m, CHECK);
0
a61af66fc99e Initial load
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parents:
diff changeset
470 // Method might have gotten rewritten.
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
471 methods->obj_at_put(i, m());
0
a61af66fc99e Initial load
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parents:
diff changeset
472 }
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
473
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
474 // Set up method entry points for compiler and interpreter .
726
be93aad57795 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 579
diff changeset
475 m->link_method(m, CHECK);
1574
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
476
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
477 // 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
478 #ifdef ASSERT
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
479 if (StressMethodComparator) {
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
480 static int nmc = 0;
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
481 for (int j = i; j >= 0 && j >= i-4; j--) {
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
482 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc);
3748
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
483 bool z = MethodComparator::methods_EMCP(m(),
d3b9f2be46ab 7033141: assert(has_cp_cache(i)) failed: oob
coleenp
parents: 2460
diff changeset
484 (methodOop)methods->obj_at(j));
1574
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
485 if (j == i && !z) {
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
486 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes();
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
487 assert(z, "method must compare equal to itself");
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
488 }
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
489 }
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
490 }
1eb493f33423 6957080: MethodComparator needs stress testing
jrose
parents: 1565
diff changeset
491 #endif //ASSERT
0
a61af66fc99e Initial load
duke
parents:
diff changeset
492 }
a61af66fc99e Initial load
duke
parents:
diff changeset
493 }