Mercurial > hg > truffle
annotate src/cpu/x86/vm/frame_x86.cpp @ 6327:be0788825ffa
Move VirtualMachineComponent to interpreter project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 07 Sep 2012 11:10:48 +0200 |
parents | 957c266d8bc5 |
children | e522a00b91aa |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "interpreter/interpreter.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "oops/markOop.hpp" | |
29 #include "oops/methodOop.hpp" | |
30 #include "oops/oop.inline.hpp" | |
4868 | 31 #include "prims/methodHandles.hpp" |
1972 | 32 #include "runtime/frame.inline.hpp" |
33 #include "runtime/handles.inline.hpp" | |
34 #include "runtime/javaCalls.hpp" | |
35 #include "runtime/monitorChunk.hpp" | |
36 #include "runtime/signature.hpp" | |
37 #include "runtime/stubCodeGenerator.hpp" | |
38 #include "runtime/stubRoutines.hpp" | |
39 #include "vmreg_x86.inline.hpp" | |
40 #ifdef COMPILER1 | |
41 #include "c1/c1_Runtime1.hpp" | |
42 #include "runtime/vframeArray.hpp" | |
43 #endif | |
0 | 44 |
45 #ifdef ASSERT | |
46 void RegisterMap::check_location_valid() { | |
47 } | |
48 #endif | |
49 | |
50 | |
51 // Profiling/safepoint support | |
52 | |
53 bool frame::safe_for_sender(JavaThread *thread) { | |
54 address sp = (address)_sp; | |
55 address fp = (address)_fp; | |
56 address unextended_sp = (address)_unextended_sp; | |
107
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57 // sp must be within the stack |
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58 bool sp_safe = (sp <= thread->stack_base()) && |
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59 (sp >= thread->stack_base() - thread->stack_size()); |
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60 |
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61 if (!sp_safe) { |
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62 return false; |
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63 } |
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64 |
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65 // unextended sp must be within the stack and above or equal sp |
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66 bool unextended_sp_safe = (unextended_sp <= thread->stack_base()) && |
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67 (unextended_sp >= sp); |
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68 |
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69 if (!unextended_sp_safe) { |
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70 return false; |
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71 } |
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72 |
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73 // an fp must be within the stack and above (but not equal) sp |
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74 bool fp_safe = (fp <= thread->stack_base()) && (fp > sp); |
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75 |
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76 // We know sp/unextended_sp are safe only fp is questionable here |
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77 |
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78 // If the current frame is known to the code cache then we can attempt to |
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79 // to construct the sender and do some validation of it. This goes a long way |
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80 // toward eliminating issues when we get in frame construction code |
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81 |
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82 if (_cb != NULL ) { |
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83 |
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84 // First check if frame is complete and tester is reliable |
0 | 85 // Unfortunately we can only check frame complete for runtime stubs and nmethod |
86 // other generic buffer blobs are more problematic so we just assume they are | |
87 // ok. adapter blobs never have a frame complete and are never ok. | |
107
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88 |
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89 if (!_cb->is_frame_complete_at(_pc)) { |
0 | 90 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
91 return false; | |
92 } | |
93 } | |
107
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94 // Entry frame checks |
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95 if (is_entry_frame()) { |
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96 // an entry frame must have a valid fp. |
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97 |
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98 if (!fp_safe) return false; |
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99 |
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100 // Validate the JavaCallWrapper an entry frame must have |
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101 |
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102 address jcw = (address)entry_frame_call_wrapper(); |
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103 |
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104 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > fp); |
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105 |
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106 return jcw_safe; |
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107 |
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108 } |
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109 |
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110 intptr_t* sender_sp = NULL; |
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111 address sender_pc = NULL; |
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112 |
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113 if (is_interpreted_frame()) { |
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114 // fp must be safe |
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115 if (!fp_safe) { |
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116 return false; |
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117 } |
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118 |
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119 sender_pc = (address) this->fp()[return_addr_offset]; |
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120 sender_sp = (intptr_t*) addr_at(sender_sp_offset); |
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121 |
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122 } else { |
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123 // must be some sort of compiled/runtime frame |
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124 // fp does not have to be safe (although it could be check for c1?) |
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125 |
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126 sender_sp = _unextended_sp + _cb->frame_size(); |
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127 // On Intel the return_address is always the word on the stack |
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128 sender_pc = (address) *(sender_sp-1); |
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129 } |
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130 |
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131 // We must always be able to find a recognizable pc |
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132 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); |
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133 if (sender_pc == NULL || sender_blob == NULL) { |
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134 return false; |
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135 } |
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136 |
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137 |
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138 // If the potential sender is the interpreter then we can do some more checking |
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139 if (Interpreter::contains(sender_pc)) { |
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140 |
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141 // ebp is always saved in a recognizable place in any code we generate. However |
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142 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp |
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143 // is really a frame pointer. |
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144 |
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145 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); |
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146 bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp); |
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147 |
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148 if (!saved_fp_safe) { |
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149 return false; |
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150 } |
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151 |
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152 // construct the potential sender |
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153 |
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154 frame sender(sender_sp, saved_fp, sender_pc); |
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155 |
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156 return sender.is_interpreted_frame_valid(thread); |
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157 |
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158 } |
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159 |
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160 // Could just be some random pointer within the codeBlob |
1748 | 161 if (!sender_blob->code_contains(sender_pc)) { |
162 return false; | |
163 } | |
107
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164 |
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165 // We should never be able to see an adapter if the current frame is something from code cache |
1748 | 166 if (sender_blob->is_adapter_blob()) { |
107
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167 return false; |
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168 } |
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169 |
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170 // Could be the call_stub |
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171 |
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172 if (StubRoutines::returns_to_call_stub(sender_pc)) { |
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173 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); |
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174 bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp); |
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175 |
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176 if (!saved_fp_safe) { |
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177 return false; |
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178 } |
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179 |
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180 // construct the potential sender |
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181 |
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182 frame sender(sender_sp, saved_fp, sender_pc); |
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183 |
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184 // Validate the JavaCallWrapper an entry frame must have |
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185 address jcw = (address)sender.entry_frame_call_wrapper(); |
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186 |
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187 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > (address)sender.fp()); |
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188 |
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189 return jcw_safe; |
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190 } |
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191 |
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192 // If the frame size is 0 something is bad because every nmethod has a non-zero frame size |
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193 // because the return address counts against the callee's frame. |
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194 |
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195 if (sender_blob->frame_size() == 0) { |
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196 assert(!sender_blob->is_nmethod(), "should count return address at least"); |
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197 return false; |
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198 } |
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199 |
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200 // We should never be able to see anything here except an nmethod. If something in the |
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201 // code cache (current frame) is called by an entity within the code cache that entity |
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202 // should not be anything but the call stub (already covered), the interpreter (already covered) |
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203 // or an nmethod. |
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204 |
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205 assert(sender_blob->is_nmethod(), "Impossible call chain"); |
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206 |
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207 // Could put some more validation for the potential non-interpreted sender |
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208 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
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209 |
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210 // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb |
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211 |
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212 // We've validated the potential sender that would be created |
0 | 213 return true; |
214 } | |
107
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215 |
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216 // Must be native-compiled frame. Since sender will try and use fp to find |
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217 // linkages it must be safe |
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218 |
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219 if (!fp_safe) { |
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220 return false; |
0 | 221 } |
107
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222 |
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223 // Will the pc we fetch be non-zero (which we'll find at the oldest frame) |
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224 |
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225 if ( (address) this->fp()[return_addr_offset] == NULL) return false; |
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226 |
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227 |
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228 // could try and do some more potential verification of native frame if we could think of some... |
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229 |
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230 return true; |
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231 |
0 | 232 } |
233 | |
234 | |
235 void frame::patch_pc(Thread* thread, address pc) { | |
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236 address* pc_addr = &(((address*) sp())[-1]); |
0 | 237 if (TracePcPatching) { |
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238 tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]", |
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239 pc_addr, *pc_addr, pc); |
0 | 240 } |
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241 // Either the return address is the original one or we are going to |
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242 // patch in the same address that's already there. |
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243 assert(_pc == *pc_addr || pc == *pc_addr, "must be"); |
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244 *pc_addr = pc; |
0 | 245 _cb = CodeCache::find_blob(pc); |
1204 | 246 address original_pc = nmethod::get_deopt_original_pc(this); |
247 if (original_pc != NULL) { | |
248 assert(original_pc == _pc, "expected original PC to be stored before patching"); | |
0 | 249 _deopt_state = is_deoptimized; |
250 // leave _pc as is | |
251 } else { | |
252 _deopt_state = not_deoptimized; | |
253 _pc = pc; | |
254 } | |
255 } | |
256 | |
257 bool frame::is_interpreted_frame() const { | |
258 return Interpreter::contains(pc()); | |
259 } | |
260 | |
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261 int frame::frame_size(RegisterMap* map) const { |
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262 frame sender = this->sender(map); |
0 | 263 return sender.sp() - sp(); |
264 } | |
265 | |
266 intptr_t* frame::entry_frame_argument_at(int offset) const { | |
267 // convert offset to index to deal with tsi | |
268 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
269 // Entry frame's arguments are always in relation to unextended_sp() | |
270 return &unextended_sp()[index]; | |
271 } | |
272 | |
273 // sender_sp | |
274 #ifdef CC_INTERP | |
275 intptr_t* frame::interpreter_frame_sender_sp() const { | |
276 assert(is_interpreted_frame(), "interpreted frame expected"); | |
277 // QQQ why does this specialize method exist if frame::sender_sp() does same thing? | |
278 // seems odd and if we always know interpreted vs. non then sender_sp() is really | |
279 // doing too much work. | |
280 return get_interpreterState()->sender_sp(); | |
281 } | |
282 | |
283 // monitor elements | |
284 | |
285 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { | |
286 return get_interpreterState()->monitor_base(); | |
287 } | |
288 | |
289 BasicObjectLock* frame::interpreter_frame_monitor_end() const { | |
290 return (BasicObjectLock*) get_interpreterState()->stack_base(); | |
291 } | |
292 | |
293 #else // CC_INTERP | |
294 | |
295 intptr_t* frame::interpreter_frame_sender_sp() const { | |
296 assert(is_interpreted_frame(), "interpreted frame expected"); | |
297 return (intptr_t*) at(interpreter_frame_sender_sp_offset); | |
298 } | |
299 | |
300 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { | |
301 assert(is_interpreted_frame(), "interpreted frame expected"); | |
302 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); | |
303 } | |
304 | |
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305 intptr_t** frame::interpreter_frame_sender_sp_addr() const { |
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306 assert(is_interpreted_frame(), "interpreted frame expected"); |
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307 return (intptr_t**) addr_at(interpreter_frame_sender_sp_offset); |
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308 } |
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309 |
0 | 310 |
311 // monitor elements | |
312 | |
313 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { | |
314 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); | |
315 } | |
316 | |
317 BasicObjectLock* frame::interpreter_frame_monitor_end() const { | |
318 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); | |
319 // make sure the pointer points inside the frame | |
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320 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); |
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321 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); |
0 | 322 return result; |
323 } | |
324 | |
325 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { | |
326 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; | |
327 } | |
328 | |
329 // Used by template based interpreter deoptimization | |
330 void frame::interpreter_frame_set_last_sp(intptr_t* sp) { | |
331 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; | |
332 } | |
333 #endif // CC_INTERP | |
334 | |
335 frame frame::sender_for_entry_frame(RegisterMap* map) const { | |
336 assert(map != NULL, "map must be set"); | |
337 // Java frame called from C; skip all C frames and return top C | |
338 // frame of that chunk as the sender | |
339 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); | |
340 assert(!entry_frame_is_first(), "next Java fp must be non zero"); | |
341 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); | |
342 map->clear(); | |
343 assert(map->include_argument_oops(), "should be set by clear"); | |
344 if (jfa->last_Java_pc() != NULL ) { | |
345 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); | |
346 return fr; | |
347 } | |
348 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp()); | |
349 return fr; | |
350 } | |
351 | |
1204 | 352 //------------------------------------------------------------------------------ |
353 // frame::verify_deopt_original_pc | |
354 // | |
355 // Verifies the calculated original PC of a deoptimization PC for the | |
356 // given unextended SP. The unextended SP might also be the saved SP | |
357 // for MethodHandle call sites. | |
358 #if ASSERT | |
359 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return) { | |
360 frame fr; | |
361 | |
362 // This is ugly but it's better than to change {get,set}_original_pc | |
363 // to take an SP value as argument. And it's only a debugging | |
364 // method anyway. | |
365 fr._unextended_sp = unextended_sp; | |
366 | |
367 address original_pc = nm->get_original_pc(&fr); | |
1748 | 368 assert(nm->insts_contains(original_pc), "original PC must be in nmethod"); |
1204 | 369 assert(nm->is_method_handle_return(original_pc) == is_method_handle_return, "must be"); |
370 } | |
371 #endif | |
372 | |
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373 //------------------------------------------------------------------------------ |
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374 // frame::adjust_unextended_sp |
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375 void frame::adjust_unextended_sp() { |
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376 // If we are returning to a compiled MethodHandle call site, the |
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377 // saved_fp will in fact be a saved value of the unextended SP. The |
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378 // simplest way to tell whether we are returning to such a call site |
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379 // is as follows: |
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380 |
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381 nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null(); |
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382 if (sender_nm != NULL) { |
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383 // If the sender PC is a deoptimization point, get the original |
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384 // PC. For MethodHandle call site the unextended_sp is stored in |
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385 // saved_fp. |
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386 if (sender_nm->is_deopt_mh_entry(_pc)) { |
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387 DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, _fp)); |
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388 _unextended_sp = _fp; |
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389 } |
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390 else if (sender_nm->is_deopt_entry(_pc)) { |
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391 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp)); |
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392 } |
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393 else if (sender_nm->is_method_handle_return(_pc)) { |
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394 _unextended_sp = _fp; |
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395 } |
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396 } |
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397 } |
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398 |
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399 //------------------------------------------------------------------------------ |
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400 // frame::update_map_with_saved_link |
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401 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { |
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402 // The interpreter and compiler(s) always save EBP/RBP in a known |
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403 // location on entry. We must record where that location is |
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404 // so this if EBP/RBP was live on callout from c2 we can find |
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405 // the saved copy no matter what it called. |
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406 |
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407 // Since the interpreter always saves EBP/RBP if we record where it is then |
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408 // we don't have to always save EBP/RBP on entry and exit to c2 compiled |
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409 // code, on entry will be enough. |
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410 map->set_location(rbp->as_VMReg(), (address) link_addr); |
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411 #ifdef AMD64 |
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412 // this is weird "H" ought to be at a higher address however the |
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413 // oopMaps seems to have the "H" regs at the same address and the |
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414 // vanilla register. |
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415 // XXXX make this go away |
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416 if (true) { |
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417 map->set_location(rbp->as_VMReg()->next(), (address) link_addr); |
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418 } |
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419 #endif // AMD64 |
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420 } |
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421 |
1204 | 422 |
423 //------------------------------------------------------------------------------ | |
424 // frame::sender_for_interpreter_frame | |
0 | 425 frame frame::sender_for_interpreter_frame(RegisterMap* map) const { |
1204 | 426 // SP is the raw SP from the sender after adapter or interpreter |
427 // extension. | |
428 intptr_t* sender_sp = this->sender_sp(); | |
0 | 429 |
430 // This is the sp before any possible extension (adapter/locals). | |
431 intptr_t* unextended_sp = interpreter_frame_sender_sp(); | |
432 | |
433 #ifdef COMPILER2 | |
434 if (map->update_map()) { | |
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435 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); |
0 | 436 } |
1204 | 437 #endif // COMPILER2 |
438 | |
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439 return frame(sender_sp, unextended_sp, link(), sender_pc()); |
0 | 440 } |
441 | |
442 | |
1204 | 443 //------------------------------------------------------------------------------ |
444 // frame::sender_for_compiled_frame | |
0 | 445 frame frame::sender_for_compiled_frame(RegisterMap* map) const { |
446 assert(map != NULL, "map must be set"); | |
447 | |
448 // frame owned by optimizing compiler | |
449 assert(_cb->frame_size() >= 0, "must have non-zero frame size"); | |
1204 | 450 intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); |
451 intptr_t* unextended_sp = sender_sp; | |
0 | 452 |
453 // On Intel the return_address is always the word on the stack | |
454 address sender_pc = (address) *(sender_sp-1); | |
455 | |
1204 | 456 // This is the saved value of EBP which may or may not really be an FP. |
457 // It is only an FP if the sender is an interpreter frame (or C1?). | |
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458 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset); |
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459 |
0 | 460 if (map->update_map()) { |
461 // Tell GC to use argument oopmaps for some runtime stubs that need it. | |
462 // For C1, the runtime stub might not have oop maps, so set this flag | |
463 // outside of update_register_map. | |
464 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); | |
465 if (_cb->oop_maps() != NULL) { | |
466 OopMapSet::update_register_map(this, map); | |
467 } | |
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468 |
1204 | 469 // Since the prolog does the save and restore of EBP there is no oopmap |
0 | 470 // for it so we must fill in its location as if there was an oopmap entry |
471 // since if our caller was compiled code there could be live jvm state in it. | |
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472 update_map_with_saved_link(map, saved_fp_addr); |
0 | 473 } |
474 | |
475 assert(sender_sp != sp(), "must have changed"); | |
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476 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc); |
0 | 477 } |
478 | |
1204 | 479 |
480 //------------------------------------------------------------------------------ | |
481 // frame::sender | |
0 | 482 frame frame::sender(RegisterMap* map) const { |
483 // Default is we done have to follow them. The sender_for_xxx will | |
484 // update it accordingly | |
485 map->set_include_argument_oops(false); | |
486 | |
487 if (is_entry_frame()) return sender_for_entry_frame(map); | |
488 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); | |
489 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); | |
490 | |
491 if (_cb != NULL) { | |
492 return sender_for_compiled_frame(map); | |
493 } | |
494 // Must be native-compiled frame, i.e. the marshaling code for native | |
495 // methods that exists in the core system. | |
496 return frame(sender_sp(), link(), sender_pc()); | |
497 } | |
498 | |
499 | |
500 bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) { | |
501 assert(is_interpreted_frame(), "must be interpreter frame"); | |
502 methodOop method = interpreter_frame_method(); | |
503 // When unpacking an optimized frame the frame pointer is | |
504 // adjusted with: | |
505 int diff = (method->max_locals() - method->size_of_parameters()) * | |
1506 | 506 Interpreter::stackElementWords; |
0 | 507 return _fp == (fp - diff); |
508 } | |
509 | |
510 void frame::pd_gc_epilog() { | |
511 // nothing done here now | |
512 } | |
513 | |
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514 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
0 | 515 // QQQ |
516 #ifdef CC_INTERP | |
517 #else | |
518 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
519 // These are reasonable sanity checks | |
520 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { | |
521 return false; | |
522 } | |
523 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { | |
524 return false; | |
525 } | |
526 if (fp() + interpreter_frame_initial_sp_offset < sp()) { | |
527 return false; | |
528 } | |
529 // These are hacks to keep us out of trouble. | |
530 // The problem with these is that they mask other problems | |
531 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above | |
532 return false; | |
533 } | |
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534 |
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535 // do some validation of frame elements |
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536 |
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537 // first the method |
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538 |
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539 methodOop m = *interpreter_frame_method_addr(); |
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540 |
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541 // validate the method we'd find in this potential sender |
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542 if (!Universe::heap()->is_valid_method(m)) return false; |
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543 |
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544 // stack frames shouldn't be much larger than max_stack elements |
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545 |
1506 | 546 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
0 | 547 return false; |
548 } | |
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549 |
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550 // validate bci/bcx |
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551 |
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552 intptr_t bcx = interpreter_frame_bcx(); |
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553 if (m->validate_bci_from_bcx(bcx) < 0) { |
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554 return false; |
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555 } |
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556 |
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557 // validate constantPoolCacheOop |
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558 |
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559 constantPoolCacheOop cp = *interpreter_frame_cache_addr(); |
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560 |
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561 if (cp == NULL || |
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562 !Space::is_aligned(cp) || |
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563 !Universe::heap()->is_permanent((void*)cp)) return false; |
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564 |
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565 // validate locals |
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566 |
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567 address locals = (address) *interpreter_frame_locals_addr(); |
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568 |
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569 if (locals > thread->stack_base() || locals < (address) fp()) return false; |
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570 |
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571 // We'd have to be pretty unlucky to be mislead at this point |
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572 |
0 | 573 #endif // CC_INTERP |
574 return true; | |
575 } | |
576 | |
577 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { | |
578 #ifdef CC_INTERP | |
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579 // Needed for JVMTI. The result should always be in the |
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580 // interpreterState object |
0 | 581 interpreterState istate = get_interpreterState(); |
582 #endif // CC_INTERP | |
583 assert(is_interpreted_frame(), "interpreted frame expected"); | |
584 methodOop method = interpreter_frame_method(); | |
585 BasicType type = method->result_type(); | |
586 | |
587 intptr_t* tos_addr; | |
588 if (method->is_native()) { | |
589 // Prior to calling into the runtime to report the method_exit the possible | |
590 // return value is pushed to the native stack. If the result is a jfloat/jdouble | |
591 // then ST0 is saved before EAX/EDX. See the note in generate_native_result | |
592 tos_addr = (intptr_t*)sp(); | |
593 if (type == T_FLOAT || type == T_DOUBLE) { | |
594 // QQQ seems like this code is equivalent on the two platforms | |
595 #ifdef AMD64 | |
596 // This is times two because we do a push(ltos) after pushing XMM0 | |
597 // and that takes two interpreter stack slots. | |
1506 | 598 tos_addr += 2 * Interpreter::stackElementWords; |
0 | 599 #else |
600 tos_addr += 2; | |
601 #endif // AMD64 | |
602 } | |
603 } else { | |
604 tos_addr = (intptr_t*)interpreter_frame_tos_address(); | |
605 } | |
606 | |
607 switch (type) { | |
608 case T_OBJECT : | |
609 case T_ARRAY : { | |
610 oop obj; | |
611 if (method->is_native()) { | |
612 #ifdef CC_INTERP | |
613 obj = istate->_oop_temp; | |
614 #else | |
615 obj = (oop) at(interpreter_frame_oop_temp_offset); | |
616 #endif // CC_INTERP | |
617 } else { | |
618 oop* obj_p = (oop*)tos_addr; | |
619 obj = (obj_p == NULL) ? (oop)NULL : *obj_p; | |
620 } | |
621 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
622 *oop_result = obj; | |
623 break; | |
624 } | |
625 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; | |
626 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; | |
627 case T_CHAR : value_result->c = *(jchar*)tos_addr; break; | |
628 case T_SHORT : value_result->s = *(jshort*)tos_addr; break; | |
629 case T_INT : value_result->i = *(jint*)tos_addr; break; | |
630 case T_LONG : value_result->j = *(jlong*)tos_addr; break; | |
631 case T_FLOAT : { | |
632 #ifdef AMD64 | |
633 value_result->f = *(jfloat*)tos_addr; | |
634 #else | |
635 if (method->is_native()) { | |
636 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat | |
637 value_result->f = (jfloat)d; | |
638 } else { | |
639 value_result->f = *(jfloat*)tos_addr; | |
640 } | |
641 #endif // AMD64 | |
642 break; | |
643 } | |
644 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; | |
645 case T_VOID : /* Nothing to do */ break; | |
646 default : ShouldNotReachHere(); | |
647 } | |
648 | |
649 return type; | |
650 } | |
651 | |
652 | |
653 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { | |
654 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
655 return &interpreter_frame_tos_address()[index]; | |
656 } | |
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657 |
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658 #ifndef PRODUCT |
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659 |
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660 #define DESCRIBE_FP_OFFSET(name) \ |
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661 values.describe(frame_no, fp() + frame::name##_offset, #name) |
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662 |
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663 void frame::describe_pd(FrameValues& values, int frame_no) { |
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664 if (is_interpreted_frame()) { |
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665 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); |
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666 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); |
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667 DESCRIBE_FP_OFFSET(interpreter_frame_method); |
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668 DESCRIBE_FP_OFFSET(interpreter_frame_mdx); |
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669 DESCRIBE_FP_OFFSET(interpreter_frame_cache); |
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670 DESCRIBE_FP_OFFSET(interpreter_frame_locals); |
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671 DESCRIBE_FP_OFFSET(interpreter_frame_bcx); |
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672 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); |
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673 } |
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674 } |
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675 #endif |
3931
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676 |
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677 intptr_t *frame::initial_deoptimization_info() { |
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678 // used to reset the saved FP |
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679 return fp(); |
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680 } |
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681 |
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682 intptr_t* frame::real_fp() const { |
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683 if (_cb != NULL) { |
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684 // use the frame size if valid |
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685 int size = _cb->frame_size(); |
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686 if (size > 0) { |
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687 return unextended_sp() + size; |
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688 } |
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689 } |
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690 // else rely on fp() |
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691 assert(! is_compiled_frame(), "unknown compiled frame size"); |
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692 return fp(); |
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693 } |