Mercurial > hg > truffle
annotate src/cpu/x86/vm/frame_x86.cpp @ 12316:190899198332
7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com
| author | hseigel |
|---|---|
| date | Thu, 26 Sep 2013 10:25:02 -0400 |
| parents | e0c9a1d29eb4 |
| children | cefad50507d8 c586f8a7322f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 1997, 2013, 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 * | |
|
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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" | |
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29 #include "oops/method.hpp" |
| 1972 | 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" | |
| 10405 | 36 #include "runtime/os.hpp" |
| 1972 | 37 #include "runtime/signature.hpp" |
| 38 #include "runtime/stubCodeGenerator.hpp" | |
| 39 #include "runtime/stubRoutines.hpp" | |
| 40 #include "vmreg_x86.inline.hpp" | |
| 41 #ifdef COMPILER1 | |
| 42 #include "c1/c1_Runtime1.hpp" | |
| 43 #include "runtime/vframeArray.hpp" | |
| 44 #endif | |
| 0 | 45 |
| 46 #ifdef ASSERT | |
| 47 void RegisterMap::check_location_valid() { | |
| 48 } | |
| 49 #endif | |
| 50 | |
| 51 | |
| 52 // Profiling/safepoint support | |
| 53 | |
| 54 bool frame::safe_for_sender(JavaThread *thread) { | |
| 55 address sp = (address)_sp; | |
| 56 address fp = (address)_fp; | |
| 57 address unextended_sp = (address)_unextended_sp; | |
| 10405 | 58 |
| 59 // consider stack guards when trying to determine "safe" stack pointers | |
| 60 static size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; | |
| 61 size_t usable_stack_size = thread->stack_size() - stack_guard_size; | |
| 62 | |
| 63 // sp must be within the usable part of the stack (not in guards) | |
| 64 bool sp_safe = (sp < thread->stack_base()) && | |
| 65 (sp >= thread->stack_base() - usable_stack_size); | |
| 66 | |
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67 |
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68 if (!sp_safe) { |
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69 return false; |
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70 } |
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71 |
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72 // unextended sp must be within the stack and above or equal sp |
| 10405 | 73 bool unextended_sp_safe = (unextended_sp < thread->stack_base()) && |
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74 (unextended_sp >= sp); |
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75 |
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76 if (!unextended_sp_safe) { |
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77 return false; |
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78 } |
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79 |
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80 // an fp must be within the stack and above (but not equal) sp |
| 10405 | 81 // second evaluation on fp+ is added to handle situation where fp is -1 |
| 82 bool fp_safe = (fp < thread->stack_base() && (fp > sp) && (((fp + (return_addr_offset * sizeof(void*))) < thread->stack_base()))); | |
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83 |
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84 // We know sp/unextended_sp are safe only fp is questionable here |
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85 |
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86 // If the current frame is known to the code cache then we can attempt to |
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87 // to construct the sender and do some validation of it. This goes a long way |
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88 // toward eliminating issues when we get in frame construction code |
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89 |
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90 if (_cb != NULL ) { |
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91 |
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92 // First check if frame is complete and tester is reliable |
| 0 | 93 // Unfortunately we can only check frame complete for runtime stubs and nmethod |
| 94 // other generic buffer blobs are more problematic so we just assume they are | |
| 95 // ok. adapter blobs never have a frame complete and are never ok. | |
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96 |
| 10405 | 97 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc |
| 98 | |
| 99 if (!Interpreter::contains(_pc) && _cb->frame_size() <= 0) { | |
| 100 //assert(0, "Invalid frame_size"); | |
| 101 return false; | |
| 102 } | |
| 103 | |
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104 if (!_cb->is_frame_complete_at(_pc)) { |
| 0 | 105 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
| 106 return false; | |
| 107 } | |
| 108 } | |
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109 |
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110 // Could just be some random pointer within the codeBlob |
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111 if (!_cb->code_contains(_pc)) { |
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112 return false; |
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113 } |
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114 |
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115 // Entry frame checks |
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116 if (is_entry_frame()) { |
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117 // an entry frame must have a valid fp. |
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118 |
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119 if (!fp_safe) return false; |
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120 |
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121 // Validate the JavaCallWrapper an entry frame must have |
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122 |
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123 address jcw = (address)entry_frame_call_wrapper(); |
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124 |
| 10405 | 125 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > fp); |
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126 |
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127 return jcw_safe; |
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128 |
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129 } |
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130 |
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131 intptr_t* sender_sp = NULL; |
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132 address sender_pc = NULL; |
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133 |
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134 if (is_interpreted_frame()) { |
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135 // fp must be safe |
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136 if (!fp_safe) { |
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137 return false; |
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138 } |
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139 |
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140 sender_pc = (address) this->fp()[return_addr_offset]; |
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141 sender_sp = (intptr_t*) addr_at(sender_sp_offset); |
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142 |
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143 } else { |
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144 // must be some sort of compiled/runtime frame |
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145 // fp does not have to be safe (although it could be check for c1?) |
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146 |
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147 sender_sp = _unextended_sp + _cb->frame_size(); |
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148 // On Intel the return_address is always the word on the stack |
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149 sender_pc = (address) *(sender_sp-1); |
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150 } |
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151 |
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152 |
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153 // If the potential sender is the interpreter then we can do some more checking |
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154 if (Interpreter::contains(sender_pc)) { |
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155 |
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156 // ebp is always saved in a recognizable place in any code we generate. However |
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157 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp |
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158 // is really a frame pointer. |
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159 |
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160 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); |
| 10405 | 161 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); |
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162 |
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163 if (!saved_fp_safe) { |
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164 return false; |
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165 } |
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166 |
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167 // construct the potential sender |
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168 |
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169 frame sender(sender_sp, saved_fp, sender_pc); |
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170 |
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171 return sender.is_interpreted_frame_valid(thread); |
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172 |
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173 } |
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174 |
| 10405 | 175 // We must always be able to find a recognizable pc |
| 176 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); | |
| 177 if (sender_pc == NULL || sender_blob == NULL) { | |
| 178 return false; | |
| 179 } | |
| 180 | |
| 181 // Could be a zombie method | |
| 182 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { | |
| 183 return false; | |
| 184 } | |
| 185 | |
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186 // Could just be some random pointer within the codeBlob |
| 1748 | 187 if (!sender_blob->code_contains(sender_pc)) { |
| 188 return false; | |
| 189 } | |
|
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190 |
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191 // We should never be able to see an adapter if the current frame is something from code cache |
| 1748 | 192 if (sender_blob->is_adapter_blob()) { |
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193 return false; |
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194 } |
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195 |
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196 // Could be the call_stub |
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197 if (StubRoutines::returns_to_call_stub(sender_pc)) { |
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198 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); |
| 10405 | 199 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); |
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200 |
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201 if (!saved_fp_safe) { |
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202 return false; |
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203 } |
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204 |
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205 // construct the potential sender |
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206 |
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207 frame sender(sender_sp, saved_fp, sender_pc); |
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208 |
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209 // Validate the JavaCallWrapper an entry frame must have |
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210 address jcw = (address)sender.entry_frame_call_wrapper(); |
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211 |
| 10405 | 212 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > (address)sender.fp()); |
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213 |
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214 return jcw_safe; |
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215 } |
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216 |
| 10405 | 217 if (sender_blob->is_nmethod()) { |
| 218 nmethod* nm = sender_blob->as_nmethod_or_null(); | |
| 219 if (nm != NULL) { | |
| 220 if (nm->is_deopt_mh_entry(sender_pc) || nm->is_deopt_entry(sender_pc)) { | |
| 221 return false; | |
| 222 } | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size | |
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227 // because the return address counts against the callee's frame. |
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228 |
| 10405 | 229 if (sender_blob->frame_size() <= 0) { |
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230 assert(!sender_blob->is_nmethod(), "should count return address at least"); |
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231 return false; |
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232 } |
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233 |
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234 // We should never be able to see anything here except an nmethod. If something in the |
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235 // code cache (current frame) is called by an entity within the code cache that entity |
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236 // should not be anything but the call stub (already covered), the interpreter (already covered) |
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237 // or an nmethod. |
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238 |
| 10405 | 239 if (!sender_blob->is_nmethod()) { |
| 240 return false; | |
| 241 } | |
|
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242 |
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243 // Could put some more validation for the potential non-interpreted sender |
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244 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
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245 |
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246 // 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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247 |
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248 // We've validated the potential sender that would be created |
| 0 | 249 return true; |
| 250 } | |
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251 |
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252 // Must be native-compiled frame. Since sender will try and use fp to find |
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253 // linkages it must be safe |
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254 |
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255 if (!fp_safe) { |
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256 return false; |
| 0 | 257 } |
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258 |
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259 // Will the pc we fetch be non-zero (which we'll find at the oldest frame) |
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260 |
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261 if ( (address) this->fp()[return_addr_offset] == NULL) return false; |
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262 |
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263 |
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264 // could try and do some more potential verification of native frame if we could think of some... |
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265 |
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266 return true; |
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267 |
| 0 | 268 } |
| 269 | |
| 270 | |
| 271 void frame::patch_pc(Thread* thread, address pc) { | |
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272 address* pc_addr = &(((address*) sp())[-1]); |
| 0 | 273 if (TracePcPatching) { |
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274 tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]", |
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275 pc_addr, *pc_addr, pc); |
| 0 | 276 } |
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277 // Either the return address is the original one or we are going to |
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278 // patch in the same address that's already there. |
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279 assert(_pc == *pc_addr || pc == *pc_addr, "must be"); |
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280 *pc_addr = pc; |
| 0 | 281 _cb = CodeCache::find_blob(pc); |
| 1204 | 282 address original_pc = nmethod::get_deopt_original_pc(this); |
| 283 if (original_pc != NULL) { | |
| 284 assert(original_pc == _pc, "expected original PC to be stored before patching"); | |
| 0 | 285 _deopt_state = is_deoptimized; |
| 286 // leave _pc as is | |
| 287 } else { | |
| 288 _deopt_state = not_deoptimized; | |
| 289 _pc = pc; | |
| 290 } | |
| 291 } | |
| 292 | |
| 293 bool frame::is_interpreted_frame() const { | |
| 294 return Interpreter::contains(pc()); | |
| 295 } | |
| 296 | |
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297 int frame::frame_size(RegisterMap* map) const { |
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298 frame sender = this->sender(map); |
| 0 | 299 return sender.sp() - sp(); |
| 300 } | |
| 301 | |
| 302 intptr_t* frame::entry_frame_argument_at(int offset) const { | |
| 303 // convert offset to index to deal with tsi | |
| 304 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
| 305 // Entry frame's arguments are always in relation to unextended_sp() | |
| 306 return &unextended_sp()[index]; | |
| 307 } | |
| 308 | |
| 309 // sender_sp | |
| 310 #ifdef CC_INTERP | |
| 311 intptr_t* frame::interpreter_frame_sender_sp() const { | |
| 312 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 313 // QQQ why does this specialize method exist if frame::sender_sp() does same thing? | |
| 314 // seems odd and if we always know interpreted vs. non then sender_sp() is really | |
| 315 // doing too much work. | |
| 316 return get_interpreterState()->sender_sp(); | |
| 317 } | |
| 318 | |
| 319 // monitor elements | |
| 320 | |
| 321 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { | |
| 322 return get_interpreterState()->monitor_base(); | |
| 323 } | |
| 324 | |
| 325 BasicObjectLock* frame::interpreter_frame_monitor_end() const { | |
| 326 return (BasicObjectLock*) get_interpreterState()->stack_base(); | |
| 327 } | |
| 328 | |
| 329 #else // CC_INTERP | |
| 330 | |
| 331 intptr_t* frame::interpreter_frame_sender_sp() const { | |
| 332 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 333 return (intptr_t*) at(interpreter_frame_sender_sp_offset); | |
| 334 } | |
| 335 | |
| 336 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { | |
| 337 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 338 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); | |
| 339 } | |
| 340 | |
| 341 | |
| 342 // monitor elements | |
| 343 | |
| 344 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { | |
| 345 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); | |
| 346 } | |
| 347 | |
| 348 BasicObjectLock* frame::interpreter_frame_monitor_end() const { | |
| 349 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); | |
| 350 // make sure the pointer points inside the frame | |
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351 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); |
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352 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); |
| 0 | 353 return result; |
| 354 } | |
| 355 | |
| 356 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { | |
| 357 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; | |
| 358 } | |
| 359 | |
| 360 // Used by template based interpreter deoptimization | |
| 361 void frame::interpreter_frame_set_last_sp(intptr_t* sp) { | |
| 362 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; | |
| 363 } | |
| 364 #endif // CC_INTERP | |
| 365 | |
| 366 frame frame::sender_for_entry_frame(RegisterMap* map) const { | |
| 367 assert(map != NULL, "map must be set"); | |
| 368 // Java frame called from C; skip all C frames and return top C | |
| 369 // frame of that chunk as the sender | |
| 370 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); | |
| 371 assert(!entry_frame_is_first(), "next Java fp must be non zero"); | |
| 372 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); | |
| 373 map->clear(); | |
| 374 assert(map->include_argument_oops(), "should be set by clear"); | |
| 375 if (jfa->last_Java_pc() != NULL ) { | |
| 376 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); | |
| 377 return fr; | |
| 378 } | |
| 379 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp()); | |
| 380 return fr; | |
| 381 } | |
| 382 | |
| 1204 | 383 //------------------------------------------------------------------------------ |
| 384 // frame::verify_deopt_original_pc | |
| 385 // | |
| 386 // Verifies the calculated original PC of a deoptimization PC for the | |
| 387 // given unextended SP. The unextended SP might also be the saved SP | |
| 388 // for MethodHandle call sites. | |
| 8721 | 389 #ifdef ASSERT |
| 1204 | 390 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return) { |
| 391 frame fr; | |
| 392 | |
| 393 // This is ugly but it's better than to change {get,set}_original_pc | |
| 394 // to take an SP value as argument. And it's only a debugging | |
| 395 // method anyway. | |
| 396 fr._unextended_sp = unextended_sp; | |
| 397 | |
| 398 address original_pc = nm->get_original_pc(&fr); | |
| 1748 | 399 assert(nm->insts_contains(original_pc), "original PC must be in nmethod"); |
| 1204 | 400 assert(nm->is_method_handle_return(original_pc) == is_method_handle_return, "must be"); |
| 401 } | |
| 402 #endif | |
| 403 | |
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404 //------------------------------------------------------------------------------ |
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405 // frame::adjust_unextended_sp |
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406 void frame::adjust_unextended_sp() { |
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407 // If we are returning to a compiled MethodHandle call site, the |
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408 // saved_fp will in fact be a saved value of the unextended SP. The |
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409 // simplest way to tell whether we are returning to such a call site |
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410 // is as follows: |
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411 |
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412 nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null(); |
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413 if (sender_nm != NULL) { |
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414 // If the sender PC is a deoptimization point, get the original |
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415 // PC. For MethodHandle call site the unextended_sp is stored in |
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416 // saved_fp. |
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417 if (sender_nm->is_deopt_mh_entry(_pc)) { |
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418 DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, _fp)); |
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419 _unextended_sp = _fp; |
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420 } |
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421 else if (sender_nm->is_deopt_entry(_pc)) { |
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422 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp)); |
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423 } |
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424 else if (sender_nm->is_method_handle_return(_pc)) { |
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425 _unextended_sp = _fp; |
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426 } |
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427 } |
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428 } |
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429 |
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430 //------------------------------------------------------------------------------ |
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431 // frame::update_map_with_saved_link |
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432 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { |
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433 // The interpreter and compiler(s) always save EBP/RBP in a known |
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434 // location on entry. We must record where that location is |
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435 // so this if EBP/RBP was live on callout from c2 we can find |
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436 // the saved copy no matter what it called. |
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437 |
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438 // Since the interpreter always saves EBP/RBP if we record where it is then |
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439 // we don't have to always save EBP/RBP on entry and exit to c2 compiled |
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440 // code, on entry will be enough. |
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441 map->set_location(rbp->as_VMReg(), (address) link_addr); |
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442 #ifdef AMD64 |
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443 // this is weird "H" ought to be at a higher address however the |
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444 // oopMaps seems to have the "H" regs at the same address and the |
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445 // vanilla register. |
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446 // XXXX make this go away |
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447 if (true) { |
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448 map->set_location(rbp->as_VMReg()->next(), (address) link_addr); |
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449 } |
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450 #endif // AMD64 |
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451 } |
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452 |
| 1204 | 453 |
| 454 //------------------------------------------------------------------------------ | |
| 455 // frame::sender_for_interpreter_frame | |
| 0 | 456 frame frame::sender_for_interpreter_frame(RegisterMap* map) const { |
| 1204 | 457 // SP is the raw SP from the sender after adapter or interpreter |
| 458 // extension. | |
| 459 intptr_t* sender_sp = this->sender_sp(); | |
| 0 | 460 |
| 461 // This is the sp before any possible extension (adapter/locals). | |
| 462 intptr_t* unextended_sp = interpreter_frame_sender_sp(); | |
| 463 | |
| 464 #ifdef COMPILER2 | |
| 465 if (map->update_map()) { | |
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466 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); |
| 0 | 467 } |
| 1204 | 468 #endif // COMPILER2 |
| 469 | |
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470 return frame(sender_sp, unextended_sp, link(), sender_pc()); |
| 0 | 471 } |
| 472 | |
| 473 | |
| 1204 | 474 //------------------------------------------------------------------------------ |
| 475 // frame::sender_for_compiled_frame | |
| 0 | 476 frame frame::sender_for_compiled_frame(RegisterMap* map) const { |
| 477 assert(map != NULL, "map must be set"); | |
| 478 | |
| 479 // frame owned by optimizing compiler | |
| 480 assert(_cb->frame_size() >= 0, "must have non-zero frame size"); | |
| 1204 | 481 intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); |
| 482 intptr_t* unextended_sp = sender_sp; | |
| 0 | 483 |
| 484 // On Intel the return_address is always the word on the stack | |
| 485 address sender_pc = (address) *(sender_sp-1); | |
| 486 | |
| 1204 | 487 // This is the saved value of EBP which may or may not really be an FP. |
| 488 // It is only an FP if the sender is an interpreter frame (or C1?). | |
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489 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset); |
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490 |
| 0 | 491 if (map->update_map()) { |
| 492 // Tell GC to use argument oopmaps for some runtime stubs that need it. | |
| 493 // For C1, the runtime stub might not have oop maps, so set this flag | |
| 494 // outside of update_register_map. | |
| 495 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); | |
| 496 if (_cb->oop_maps() != NULL) { | |
| 497 OopMapSet::update_register_map(this, map); | |
| 498 } | |
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499 |
| 1204 | 500 // Since the prolog does the save and restore of EBP there is no oopmap |
| 0 | 501 // for it so we must fill in its location as if there was an oopmap entry |
| 502 // since if our caller was compiled code there could be live jvm state in it. | |
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503 update_map_with_saved_link(map, saved_fp_addr); |
| 0 | 504 } |
| 505 | |
| 506 assert(sender_sp != sp(), "must have changed"); | |
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507 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc); |
| 0 | 508 } |
| 509 | |
| 1204 | 510 |
| 511 //------------------------------------------------------------------------------ | |
| 512 // frame::sender | |
| 0 | 513 frame frame::sender(RegisterMap* map) const { |
| 514 // Default is we done have to follow them. The sender_for_xxx will | |
| 515 // update it accordingly | |
| 516 map->set_include_argument_oops(false); | |
| 517 | |
| 518 if (is_entry_frame()) return sender_for_entry_frame(map); | |
| 519 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); | |
| 520 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); | |
| 521 | |
| 522 if (_cb != NULL) { | |
| 523 return sender_for_compiled_frame(map); | |
| 524 } | |
| 525 // Must be native-compiled frame, i.e. the marshaling code for native | |
| 526 // methods that exists in the core system. | |
| 527 return frame(sender_sp(), link(), sender_pc()); | |
| 528 } | |
| 529 | |
| 530 | |
| 531 bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) { | |
| 532 assert(is_interpreted_frame(), "must be interpreter frame"); | |
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533 Method* method = interpreter_frame_method(); |
| 0 | 534 // When unpacking an optimized frame the frame pointer is |
| 535 // adjusted with: | |
| 536 int diff = (method->max_locals() - method->size_of_parameters()) * | |
| 1506 | 537 Interpreter::stackElementWords; |
| 0 | 538 return _fp == (fp - diff); |
| 539 } | |
| 540 | |
| 541 void frame::pd_gc_epilog() { | |
| 542 // nothing done here now | |
| 543 } | |
| 544 | |
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545 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
| 0 | 546 // QQQ |
| 547 #ifdef CC_INTERP | |
| 548 #else | |
| 549 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 550 // These are reasonable sanity checks | |
| 551 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { | |
| 552 return false; | |
| 553 } | |
| 554 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { | |
| 555 return false; | |
| 556 } | |
| 557 if (fp() + interpreter_frame_initial_sp_offset < sp()) { | |
| 558 return false; | |
| 559 } | |
| 560 // These are hacks to keep us out of trouble. | |
| 561 // The problem with these is that they mask other problems | |
| 562 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above | |
| 563 return false; | |
| 564 } | |
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565 |
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566 // do some validation of frame elements |
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567 |
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568 // first the method |
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569 |
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570 Method* m = *interpreter_frame_method_addr(); |
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571 |
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572 // validate the method we'd find in this potential sender |
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573 if (!m->is_valid_method()) return false; |
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574 |
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575 // stack frames shouldn't be much larger than max_stack elements |
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576 |
| 1506 | 577 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
| 0 | 578 return false; |
| 579 } | |
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580 |
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581 // validate bci/bcx |
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582 |
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583 intptr_t bcx = interpreter_frame_bcx(); |
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584 if (m->validate_bci_from_bcx(bcx) < 0) { |
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585 return false; |
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586 } |
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587 |
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588 // validate ConstantPoolCache* |
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589 ConstantPoolCache* cp = *interpreter_frame_cache_addr(); |
| 11034 | 590 if (cp == NULL || !cp->is_metaspace_object()) return false; |
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591 |
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592 // validate locals |
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593 |
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594 address locals = (address) *interpreter_frame_locals_addr(); |
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595 |
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596 if (locals > thread->stack_base() || locals < (address) fp()) return false; |
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597 |
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598 // We'd have to be pretty unlucky to be mislead at this point |
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599 |
| 0 | 600 #endif // CC_INTERP |
| 601 return true; | |
| 602 } | |
| 603 | |
| 604 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { | |
| 605 #ifdef CC_INTERP | |
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606 // Needed for JVMTI. The result should always be in the |
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607 // interpreterState object |
| 0 | 608 interpreterState istate = get_interpreterState(); |
| 609 #endif // CC_INTERP | |
| 610 assert(is_interpreted_frame(), "interpreted frame expected"); | |
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611 Method* method = interpreter_frame_method(); |
| 0 | 612 BasicType type = method->result_type(); |
| 613 | |
| 614 intptr_t* tos_addr; | |
| 615 if (method->is_native()) { | |
| 616 // Prior to calling into the runtime to report the method_exit the possible | |
| 617 // return value is pushed to the native stack. If the result is a jfloat/jdouble | |
| 618 // then ST0 is saved before EAX/EDX. See the note in generate_native_result | |
| 619 tos_addr = (intptr_t*)sp(); | |
| 620 if (type == T_FLOAT || type == T_DOUBLE) { | |
| 621 // QQQ seems like this code is equivalent on the two platforms | |
| 622 #ifdef AMD64 | |
| 623 // This is times two because we do a push(ltos) after pushing XMM0 | |
| 624 // and that takes two interpreter stack slots. | |
| 1506 | 625 tos_addr += 2 * Interpreter::stackElementWords; |
| 0 | 626 #else |
| 627 tos_addr += 2; | |
| 628 #endif // AMD64 | |
| 629 } | |
| 630 } else { | |
| 631 tos_addr = (intptr_t*)interpreter_frame_tos_address(); | |
| 632 } | |
| 633 | |
| 634 switch (type) { | |
| 635 case T_OBJECT : | |
| 636 case T_ARRAY : { | |
| 637 oop obj; | |
| 638 if (method->is_native()) { | |
| 639 #ifdef CC_INTERP | |
| 640 obj = istate->_oop_temp; | |
| 641 #else | |
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642 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset)); |
| 0 | 643 #endif // CC_INTERP |
| 644 } else { | |
| 645 oop* obj_p = (oop*)tos_addr; | |
| 646 obj = (obj_p == NULL) ? (oop)NULL : *obj_p; | |
| 647 } | |
| 648 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
| 649 *oop_result = obj; | |
| 650 break; | |
| 651 } | |
| 652 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; | |
| 653 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; | |
| 654 case T_CHAR : value_result->c = *(jchar*)tos_addr; break; | |
| 655 case T_SHORT : value_result->s = *(jshort*)tos_addr; break; | |
| 656 case T_INT : value_result->i = *(jint*)tos_addr; break; | |
| 657 case T_LONG : value_result->j = *(jlong*)tos_addr; break; | |
| 658 case T_FLOAT : { | |
| 659 #ifdef AMD64 | |
| 660 value_result->f = *(jfloat*)tos_addr; | |
| 661 #else | |
| 662 if (method->is_native()) { | |
| 663 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat | |
| 664 value_result->f = (jfloat)d; | |
| 665 } else { | |
| 666 value_result->f = *(jfloat*)tos_addr; | |
| 667 } | |
| 668 #endif // AMD64 | |
| 669 break; | |
| 670 } | |
| 671 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; | |
| 672 case T_VOID : /* Nothing to do */ break; | |
| 673 default : ShouldNotReachHere(); | |
| 674 } | |
| 675 | |
| 676 return type; | |
| 677 } | |
| 678 | |
| 679 | |
| 680 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { | |
| 681 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
| 682 return &interpreter_frame_tos_address()[index]; | |
| 683 } | |
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684 |
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685 #ifndef PRODUCT |
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686 |
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687 #define DESCRIBE_FP_OFFSET(name) \ |
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688 values.describe(frame_no, fp() + frame::name##_offset, #name) |
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689 |
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690 void frame::describe_pd(FrameValues& values, int frame_no) { |
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691 if (is_interpreted_frame()) { |
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692 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); |
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693 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); |
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694 DESCRIBE_FP_OFFSET(interpreter_frame_method); |
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695 DESCRIBE_FP_OFFSET(interpreter_frame_mdx); |
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696 DESCRIBE_FP_OFFSET(interpreter_frame_cache); |
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697 DESCRIBE_FP_OFFSET(interpreter_frame_locals); |
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698 DESCRIBE_FP_OFFSET(interpreter_frame_bcx); |
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699 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); |
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700 } |
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701 } |
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702 #endif |
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703 |
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704 intptr_t *frame::initial_deoptimization_info() { |
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705 // used to reset the saved FP |
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706 return fp(); |
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707 } |
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708 |
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709 intptr_t* frame::real_fp() const { |
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710 if (_cb != NULL) { |
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711 // use the frame size if valid |
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712 int size = _cb->frame_size(); |
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713 if (size > 0) { |
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714 return unextended_sp() + size; |
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715 } |
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716 } |
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717 // else rely on fp() |
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718 assert(! is_compiled_frame(), "unknown compiled frame size"); |
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719 return fp(); |
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720 } |