Mercurial > hg > truffle
annotate src/cpu/x86/vm/frame_x86.cpp @ 2044:06f017f7daa7
Merge.
| author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
|---|---|
| date | Fri, 07 Jan 2011 18:18:08 +0100 |
| parents | 1aa5b22a7716 f95d63e2154a |
| children | d9e4d0aefc90 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1997, 2010, 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" | |
| 29 #include "oops/methodOop.hpp" | |
| 30 #include "oops/oop.inline.hpp" | |
| 31 #include "runtime/frame.inline.hpp" | |
| 32 #include "runtime/handles.inline.hpp" | |
| 33 #include "runtime/javaCalls.hpp" | |
| 34 #include "runtime/monitorChunk.hpp" | |
| 35 #include "runtime/signature.hpp" | |
| 36 #include "runtime/stubCodeGenerator.hpp" | |
| 37 #include "runtime/stubRoutines.hpp" | |
| 38 #include "vmreg_x86.inline.hpp" | |
| 39 #ifdef COMPILER1 | |
| 40 #include "c1/c1_Runtime1.hpp" | |
| 41 #include "runtime/vframeArray.hpp" | |
| 42 #endif | |
| 0 | 43 |
| 44 #ifdef ASSERT | |
| 45 void RegisterMap::check_location_valid() { | |
| 46 } | |
| 47 #endif | |
| 48 | |
| 49 | |
| 50 // Profiling/safepoint support | |
| 51 | |
| 52 bool frame::safe_for_sender(JavaThread *thread) { | |
| 53 address sp = (address)_sp; | |
| 54 address fp = (address)_fp; | |
| 55 address unextended_sp = (address)_unextended_sp; | |
|
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56 // sp must be within the stack |
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57 bool sp_safe = (sp <= thread->stack_base()) && |
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58 (sp >= thread->stack_base() - thread->stack_size()); |
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59 |
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60 if (!sp_safe) { |
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61 return false; |
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62 } |
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63 |
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64 // unextended sp must be within the stack and above or equal sp |
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65 bool unextended_sp_safe = (unextended_sp <= thread->stack_base()) && |
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66 (unextended_sp >= sp); |
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67 |
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68 if (!unextended_sp_safe) { |
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69 return false; |
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70 } |
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71 |
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72 // an fp must be within the stack and above (but not equal) sp |
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73 bool fp_safe = (fp <= thread->stack_base()) && (fp > sp); |
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74 |
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75 // We know sp/unextended_sp are safe only fp is questionable here |
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76 |
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77 // If the current frame is known to the code cache then we can attempt to |
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78 // to construct the sender and do some validation of it. This goes a long way |
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79 // toward eliminating issues when we get in frame construction code |
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80 |
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81 if (_cb != NULL ) { |
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82 |
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83 // First check if frame is complete and tester is reliable |
| 0 | 84 // Unfortunately we can only check frame complete for runtime stubs and nmethod |
| 85 // other generic buffer blobs are more problematic so we just assume they are | |
| 86 // ok. adapter blobs never have a frame complete and are never ok. | |
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87 |
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88 if (!_cb->is_frame_complete_at(_pc)) { |
| 0 | 89 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
| 90 return false; | |
| 91 } | |
| 92 } | |
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93 // Entry frame checks |
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94 if (is_entry_frame()) { |
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95 // an entry frame must have a valid fp. |
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96 |
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97 if (!fp_safe) return false; |
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98 |
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99 // Validate the JavaCallWrapper an entry frame must have |
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100 |
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101 address jcw = (address)entry_frame_call_wrapper(); |
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102 |
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103 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > fp); |
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104 |
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105 return jcw_safe; |
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106 |
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107 } |
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108 |
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109 intptr_t* sender_sp = NULL; |
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110 address sender_pc = NULL; |
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111 |
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112 if (is_interpreted_frame()) { |
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113 // fp must be safe |
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114 if (!fp_safe) { |
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115 return false; |
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116 } |
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117 |
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118 sender_pc = (address) this->fp()[return_addr_offset]; |
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119 sender_sp = (intptr_t*) addr_at(sender_sp_offset); |
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120 |
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121 } else { |
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122 // must be some sort of compiled/runtime frame |
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123 // fp does not have to be safe (although it could be check for c1?) |
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124 |
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125 sender_sp = _unextended_sp + _cb->frame_size(); |
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126 // On Intel the return_address is always the word on the stack |
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127 sender_pc = (address) *(sender_sp-1); |
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128 } |
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129 |
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130 // We must always be able to find a recognizable pc |
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131 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); |
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132 if (sender_pc == NULL || sender_blob == NULL) { |
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133 return false; |
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134 } |
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135 |
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136 |
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137 // If the potential sender is the interpreter then we can do some more checking |
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138 if (Interpreter::contains(sender_pc)) { |
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139 |
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140 // ebp is always saved in a recognizable place in any code we generate. However |
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141 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp |
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142 // is really a frame pointer. |
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143 |
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144 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); |
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145 bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp); |
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146 |
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147 if (!saved_fp_safe) { |
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148 return false; |
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149 } |
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150 |
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151 // construct the potential sender |
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152 |
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153 frame sender(sender_sp, saved_fp, sender_pc); |
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154 |
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155 return sender.is_interpreted_frame_valid(thread); |
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156 |
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157 } |
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158 |
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159 // Could just be some random pointer within the codeBlob |
| 1748 | 160 if (!sender_blob->code_contains(sender_pc)) { |
| 161 return false; | |
| 162 } | |
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163 |
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164 // We should never be able to see an adapter if the current frame is something from code cache |
| 1748 | 165 if (sender_blob->is_adapter_blob()) { |
|
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166 return false; |
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167 } |
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168 |
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169 // Could be the call_stub |
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170 |
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171 if (StubRoutines::returns_to_call_stub(sender_pc)) { |
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172 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); |
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173 bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp); |
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174 |
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175 if (!saved_fp_safe) { |
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176 return false; |
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177 } |
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178 |
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179 // construct the potential sender |
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180 |
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181 frame sender(sender_sp, saved_fp, sender_pc); |
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182 |
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183 // Validate the JavaCallWrapper an entry frame must have |
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184 address jcw = (address)sender.entry_frame_call_wrapper(); |
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185 |
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186 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > (address)sender.fp()); |
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187 |
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188 return jcw_safe; |
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189 } |
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190 |
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191 // If the frame size is 0 something is bad because every nmethod has a non-zero frame size |
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192 // because the return address counts against the callee's frame. |
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193 |
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194 if (sender_blob->frame_size() == 0) { |
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195 assert(!sender_blob->is_nmethod(), "should count return address at least"); |
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196 return false; |
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197 } |
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198 |
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199 // We should never be able to see anything here except an nmethod. If something in the |
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200 // code cache (current frame) is called by an entity within the code cache that entity |
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201 // should not be anything but the call stub (already covered), the interpreter (already covered) |
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202 // or an nmethod. |
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203 |
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204 assert(sender_blob->is_nmethod(), "Impossible call chain"); |
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205 |
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206 // Could put some more validation for the potential non-interpreted sender |
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207 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
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208 |
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209 // 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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210 |
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211 // We've validated the potential sender that would be created |
| 0 | 212 return true; |
| 213 } | |
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214 |
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215 // Must be native-compiled frame. Since sender will try and use fp to find |
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216 // linkages it must be safe |
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217 |
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218 if (!fp_safe) { |
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219 return false; |
| 0 | 220 } |
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221 |
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222 // Will the pc we fetch be non-zero (which we'll find at the oldest frame) |
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223 |
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224 if ( (address) this->fp()[return_addr_offset] == NULL) return false; |
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225 |
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226 |
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227 // could try and do some more potential verification of native frame if we could think of some... |
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228 |
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229 return true; |
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230 |
| 0 | 231 } |
| 232 | |
| 233 | |
| 234 void frame::patch_pc(Thread* thread, address pc) { | |
| 235 if (TracePcPatching) { | |
| 304 | 236 tty->print_cr("patch_pc at address" INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "] ", |
| 237 &((address *)sp())[-1], ((address *)sp())[-1], pc); | |
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238 tty->print_cr("sp[0]: " INTPTR_FORMAT, ((intptr_t*)sp())[0]); |
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239 tty->print_cr("sp[1]: " INTPTR_FORMAT, ((intptr_t*)sp())[1]); |
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240 tty->print_cr("sp[2]: " INTPTR_FORMAT, ((intptr_t*)sp())[2]); |
| 0 | 241 } |
| 242 ((address *)sp())[-1] = pc; | |
| 243 _cb = CodeCache::find_blob(pc); | |
| 1204 | 244 address original_pc = nmethod::get_deopt_original_pc(this); |
| 245 if (original_pc != NULL) { | |
| 246 assert(original_pc == _pc, "expected original PC to be stored before patching"); | |
| 0 | 247 _deopt_state = is_deoptimized; |
| 248 // leave _pc as is | |
| 249 } else { | |
| 250 _deopt_state = not_deoptimized; | |
| 251 _pc = pc; | |
| 252 } | |
| 253 } | |
| 254 | |
| 255 bool frame::is_interpreted_frame() const { | |
| 256 return Interpreter::contains(pc()); | |
| 257 } | |
| 258 | |
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259 int frame::frame_size(RegisterMap* map) const { |
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260 frame sender = this->sender(map); |
| 0 | 261 return sender.sp() - sp(); |
| 262 } | |
| 263 | |
| 264 intptr_t* frame::entry_frame_argument_at(int offset) const { | |
| 265 // convert offset to index to deal with tsi | |
| 266 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
| 267 // Entry frame's arguments are always in relation to unextended_sp() | |
| 268 return &unextended_sp()[index]; | |
| 269 } | |
| 270 | |
| 271 // sender_sp | |
| 272 #ifdef CC_INTERP | |
| 273 intptr_t* frame::interpreter_frame_sender_sp() const { | |
| 274 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 275 // QQQ why does this specialize method exist if frame::sender_sp() does same thing? | |
| 276 // seems odd and if we always know interpreted vs. non then sender_sp() is really | |
| 277 // doing too much work. | |
| 278 return get_interpreterState()->sender_sp(); | |
| 279 } | |
| 280 | |
| 281 // monitor elements | |
| 282 | |
| 283 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { | |
| 284 return get_interpreterState()->monitor_base(); | |
| 285 } | |
| 286 | |
| 287 BasicObjectLock* frame::interpreter_frame_monitor_end() const { | |
| 288 return (BasicObjectLock*) get_interpreterState()->stack_base(); | |
| 289 } | |
| 290 | |
| 291 #else // CC_INTERP | |
| 292 | |
| 293 intptr_t* frame::interpreter_frame_sender_sp() const { | |
| 294 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 295 return (intptr_t*) at(interpreter_frame_sender_sp_offset); | |
| 296 } | |
| 297 | |
| 298 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { | |
| 299 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 300 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); | |
| 301 } | |
| 302 | |
| 303 | |
| 304 // monitor elements | |
| 305 | |
| 306 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { | |
| 307 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); | |
| 308 } | |
| 309 | |
| 310 BasicObjectLock* frame::interpreter_frame_monitor_end() const { | |
| 311 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); | |
| 312 // make sure the pointer points inside the frame | |
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313 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); |
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314 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); |
| 0 | 315 return result; |
| 316 } | |
| 317 | |
| 318 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { | |
| 319 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; | |
| 320 } | |
| 321 | |
| 322 // Used by template based interpreter deoptimization | |
| 323 void frame::interpreter_frame_set_last_sp(intptr_t* sp) { | |
| 324 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; | |
| 325 } | |
| 326 #endif // CC_INTERP | |
| 327 | |
| 328 frame frame::sender_for_entry_frame(RegisterMap* map) const { | |
| 329 assert(map != NULL, "map must be set"); | |
| 330 // Java frame called from C; skip all C frames and return top C | |
| 331 // frame of that chunk as the sender | |
| 332 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); | |
| 333 assert(!entry_frame_is_first(), "next Java fp must be non zero"); | |
| 334 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); | |
| 335 map->clear(); | |
| 336 assert(map->include_argument_oops(), "should be set by clear"); | |
| 337 if (jfa->last_Java_pc() != NULL ) { | |
| 338 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); | |
| 339 return fr; | |
| 340 } | |
| 341 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp()); | |
| 342 return fr; | |
| 343 } | |
| 344 | |
| 1204 | 345 |
| 346 //------------------------------------------------------------------------------ | |
| 347 // frame::verify_deopt_original_pc | |
| 348 // | |
| 349 // Verifies the calculated original PC of a deoptimization PC for the | |
| 350 // given unextended SP. The unextended SP might also be the saved SP | |
| 351 // for MethodHandle call sites. | |
| 352 #if ASSERT | |
| 353 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return) { | |
| 354 frame fr; | |
| 355 | |
| 356 // This is ugly but it's better than to change {get,set}_original_pc | |
| 357 // to take an SP value as argument. And it's only a debugging | |
| 358 // method anyway. | |
| 359 fr._unextended_sp = unextended_sp; | |
| 360 | |
| 361 address original_pc = nm->get_original_pc(&fr); | |
| 1748 | 362 assert(nm->insts_contains(original_pc), "original PC must be in nmethod"); |
| 1204 | 363 assert(nm->is_method_handle_return(original_pc) == is_method_handle_return, "must be"); |
| 364 } | |
| 365 #endif | |
| 366 | |
| 367 | |
| 368 //------------------------------------------------------------------------------ | |
| 369 // frame::sender_for_interpreter_frame | |
| 0 | 370 frame frame::sender_for_interpreter_frame(RegisterMap* map) const { |
| 1204 | 371 // SP is the raw SP from the sender after adapter or interpreter |
| 372 // extension. | |
| 373 intptr_t* sender_sp = this->sender_sp(); | |
| 0 | 374 |
| 375 // This is the sp before any possible extension (adapter/locals). | |
| 376 intptr_t* unextended_sp = interpreter_frame_sender_sp(); | |
| 377 | |
| 1204 | 378 // Stored FP. |
| 379 intptr_t* saved_fp = link(); | |
| 380 | |
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381 address sender_pc = this->sender_pc(); |
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382 CodeBlob* sender_cb = CodeCache::find_blob_unsafe(sender_pc); |
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383 assert(sender_cb, "sanity"); |
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384 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
| 1204 | 385 |
| 386 if (sender_nm != NULL) { | |
| 387 // If the sender PC is a deoptimization point, get the original | |
| 388 // PC. For MethodHandle call site the unextended_sp is stored in | |
| 389 // saved_fp. | |
| 390 if (sender_nm->is_deopt_mh_entry(sender_pc)) { | |
| 391 DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, saved_fp)); | |
| 392 unextended_sp = saved_fp; | |
| 393 } | |
| 394 else if (sender_nm->is_deopt_entry(sender_pc)) { | |
| 395 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, unextended_sp)); | |
| 396 } | |
| 397 else if (sender_nm->is_method_handle_return(sender_pc)) { | |
| 398 unextended_sp = saved_fp; | |
| 399 } | |
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400 } |
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401 |
| 0 | 402 // The interpreter and compiler(s) always save EBP/RBP in a known |
| 403 // location on entry. We must record where that location is | |
| 404 // so this if EBP/RBP was live on callout from c2 we can find | |
| 405 // the saved copy no matter what it called. | |
| 406 | |
| 407 // Since the interpreter always saves EBP/RBP if we record where it is then | |
| 408 // we don't have to always save EBP/RBP on entry and exit to c2 compiled | |
| 409 // code, on entry will be enough. | |
| 410 #ifdef COMPILER2 | |
| 411 if (map->update_map()) { | |
| 412 map->set_location(rbp->as_VMReg(), (address) addr_at(link_offset)); | |
| 413 #ifdef AMD64 | |
| 414 // this is weird "H" ought to be at a higher address however the | |
| 415 // oopMaps seems to have the "H" regs at the same address and the | |
| 416 // vanilla register. | |
| 417 // XXXX make this go away | |
| 418 if (true) { | |
| 419 map->set_location(rbp->as_VMReg()->next(), (address)addr_at(link_offset)); | |
| 420 } | |
| 421 #endif // AMD64 | |
| 422 } | |
| 1204 | 423 #endif // COMPILER2 |
| 424 | |
| 425 return frame(sender_sp, unextended_sp, saved_fp, sender_pc); | |
| 0 | 426 } |
| 427 | |
| 428 | |
| 1204 | 429 //------------------------------------------------------------------------------ |
| 430 // frame::sender_for_compiled_frame | |
| 0 | 431 frame frame::sender_for_compiled_frame(RegisterMap* map) const { |
| 432 assert(map != NULL, "map must be set"); | |
| 433 | |
| 434 // frame owned by optimizing compiler | |
| 435 assert(_cb->frame_size() >= 0, "must have non-zero frame size"); | |
| 1204 | 436 intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); |
| 437 intptr_t* unextended_sp = sender_sp; | |
| 0 | 438 |
| 439 // On Intel the return_address is always the word on the stack | |
| 440 address sender_pc = (address) *(sender_sp-1); | |
| 441 | |
| 1204 | 442 // This is the saved value of EBP which may or may not really be an FP. |
| 443 // It is only an FP if the sender is an interpreter frame (or C1?). | |
| 444 intptr_t* saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset); | |
| 0 | 445 |
| 1204 | 446 // If we are returning to a compiled MethodHandle call site, the |
| 447 // saved_fp will in fact be a saved value of the unextended SP. The | |
| 448 // simplest way to tell whether we are returning to such a call site | |
| 449 // is as follows: | |
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450 CodeBlob* sender_cb = CodeCache::find_blob_unsafe(sender_pc); |
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451 assert(sender_cb, "sanity"); |
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452 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
| 1204 | 453 |
| 454 if (sender_nm != NULL) { | |
| 455 // If the sender PC is a deoptimization point, get the original | |
| 456 // PC. For MethodHandle call site the unextended_sp is stored in | |
| 457 // saved_fp. | |
| 458 if (sender_nm->is_deopt_mh_entry(sender_pc)) { | |
| 459 DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, saved_fp)); | |
| 460 unextended_sp = saved_fp; | |
| 461 } | |
| 462 else if (sender_nm->is_deopt_entry(sender_pc)) { | |
| 463 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, unextended_sp)); | |
| 464 } | |
| 465 else if (sender_nm->is_method_handle_return(sender_pc)) { | |
| 466 unextended_sp = saved_fp; | |
| 467 } | |
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468 } |
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469 |
| 0 | 470 if (map->update_map()) { |
| 471 // Tell GC to use argument oopmaps for some runtime stubs that need it. | |
| 472 // For C1, the runtime stub might not have oop maps, so set this flag | |
| 473 // outside of update_register_map. | |
| 474 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); | |
| 475 if (_cb->oop_maps() != NULL) { | |
| 476 OopMapSet::update_register_map(this, map); | |
| 477 } | |
| 1204 | 478 // Since the prolog does the save and restore of EBP there is no oopmap |
| 0 | 479 // for it so we must fill in its location as if there was an oopmap entry |
| 480 // since if our caller was compiled code there could be live jvm state in it. | |
| 481 map->set_location(rbp->as_VMReg(), (address) (sender_sp - frame::sender_sp_offset)); | |
| 482 #ifdef AMD64 | |
| 483 // this is weird "H" ought to be at a higher address however the | |
| 484 // oopMaps seems to have the "H" regs at the same address and the | |
| 485 // vanilla register. | |
| 486 // XXXX make this go away | |
| 487 if (true) { | |
| 488 map->set_location(rbp->as_VMReg()->next(), (address) (sender_sp - frame::sender_sp_offset)); | |
| 489 } | |
| 490 #endif // AMD64 | |
| 491 } | |
| 492 | |
| 493 assert(sender_sp != sp(), "must have changed"); | |
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494 return frame(sender_sp, unextended_sp, saved_fp, sender_pc); |
| 0 | 495 } |
| 496 | |
| 1204 | 497 |
| 498 //------------------------------------------------------------------------------ | |
| 499 // frame::sender | |
| 0 | 500 frame frame::sender(RegisterMap* map) const { |
| 501 // Default is we done have to follow them. The sender_for_xxx will | |
| 502 // update it accordingly | |
| 503 map->set_include_argument_oops(false); | |
| 504 | |
| 505 if (is_entry_frame()) return sender_for_entry_frame(map); | |
| 506 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); | |
| 507 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); | |
| 508 | |
| 509 if (_cb != NULL) { | |
| 510 return sender_for_compiled_frame(map); | |
| 511 } | |
| 512 // Must be native-compiled frame, i.e. the marshaling code for native | |
| 513 // methods that exists in the core system. | |
| 514 return frame(sender_sp(), link(), sender_pc()); | |
| 515 } | |
| 516 | |
| 517 | |
| 518 bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) { | |
| 519 assert(is_interpreted_frame(), "must be interpreter frame"); | |
| 520 methodOop method = interpreter_frame_method(); | |
| 521 // When unpacking an optimized frame the frame pointer is | |
| 522 // adjusted with: | |
| 523 int diff = (method->max_locals() - method->size_of_parameters()) * | |
| 1506 | 524 Interpreter::stackElementWords; |
| 0 | 525 return _fp == (fp - diff); |
| 526 } | |
| 527 | |
| 528 void frame::pd_gc_epilog() { | |
| 529 // nothing done here now | |
| 530 } | |
| 531 | |
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532 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
| 0 | 533 // QQQ |
| 534 #ifdef CC_INTERP | |
| 535 #else | |
| 536 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 537 // These are reasonable sanity checks | |
| 538 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { | |
| 539 return false; | |
| 540 } | |
| 541 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { | |
| 542 return false; | |
| 543 } | |
| 544 if (fp() + interpreter_frame_initial_sp_offset < sp()) { | |
| 545 return false; | |
| 546 } | |
| 547 // These are hacks to keep us out of trouble. | |
| 548 // The problem with these is that they mask other problems | |
| 549 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above | |
| 550 return false; | |
| 551 } | |
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552 |
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553 // do some validation of frame elements |
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554 |
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555 // first the method |
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556 |
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557 methodOop m = *interpreter_frame_method_addr(); |
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558 |
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559 // validate the method we'd find in this potential sender |
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560 if (!Universe::heap()->is_valid_method(m)) return false; |
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561 |
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562 // stack frames shouldn't be much larger than max_stack elements |
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563 |
| 1506 | 564 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
| 0 | 565 return false; |
| 566 } | |
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567 |
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568 // validate bci/bcx |
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569 |
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570 intptr_t bcx = interpreter_frame_bcx(); |
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571 if (m->validate_bci_from_bcx(bcx) < 0) { |
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572 return false; |
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573 } |
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574 |
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575 // validate constantPoolCacheOop |
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576 |
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577 constantPoolCacheOop cp = *interpreter_frame_cache_addr(); |
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578 |
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579 if (cp == NULL || |
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580 !Space::is_aligned(cp) || |
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581 !Universe::heap()->is_permanent((void*)cp)) return false; |
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582 |
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583 // validate locals |
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584 |
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585 address locals = (address) *interpreter_frame_locals_addr(); |
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586 |
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587 if (locals > thread->stack_base() || locals < (address) fp()) return false; |
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588 |
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589 // We'd have to be pretty unlucky to be mislead at this point |
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590 |
| 0 | 591 #endif // CC_INTERP |
| 592 return true; | |
| 593 } | |
| 594 | |
| 595 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { | |
| 596 #ifdef CC_INTERP | |
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597 // Needed for JVMTI. The result should always be in the |
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598 // interpreterState object |
| 0 | 599 interpreterState istate = get_interpreterState(); |
| 600 #endif // CC_INTERP | |
| 601 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 602 methodOop method = interpreter_frame_method(); | |
| 603 BasicType type = method->result_type(); | |
| 604 | |
| 605 intptr_t* tos_addr; | |
| 606 if (method->is_native()) { | |
| 607 // Prior to calling into the runtime to report the method_exit the possible | |
| 608 // return value is pushed to the native stack. If the result is a jfloat/jdouble | |
| 609 // then ST0 is saved before EAX/EDX. See the note in generate_native_result | |
| 610 tos_addr = (intptr_t*)sp(); | |
| 611 if (type == T_FLOAT || type == T_DOUBLE) { | |
| 612 // QQQ seems like this code is equivalent on the two platforms | |
| 613 #ifdef AMD64 | |
| 614 // This is times two because we do a push(ltos) after pushing XMM0 | |
| 615 // and that takes two interpreter stack slots. | |
| 1506 | 616 tos_addr += 2 * Interpreter::stackElementWords; |
| 0 | 617 #else |
| 618 tos_addr += 2; | |
| 619 #endif // AMD64 | |
| 620 } | |
| 621 } else { | |
| 622 tos_addr = (intptr_t*)interpreter_frame_tos_address(); | |
| 623 } | |
| 624 | |
| 625 switch (type) { | |
| 626 case T_OBJECT : | |
| 627 case T_ARRAY : { | |
| 628 oop obj; | |
| 629 if (method->is_native()) { | |
| 630 #ifdef CC_INTERP | |
| 631 obj = istate->_oop_temp; | |
| 632 #else | |
| 633 obj = (oop) at(interpreter_frame_oop_temp_offset); | |
| 634 #endif // CC_INTERP | |
| 635 } else { | |
| 636 oop* obj_p = (oop*)tos_addr; | |
| 637 obj = (obj_p == NULL) ? (oop)NULL : *obj_p; | |
| 638 } | |
| 639 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
| 640 *oop_result = obj; | |
| 641 break; | |
| 642 } | |
| 643 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; | |
| 644 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; | |
| 645 case T_CHAR : value_result->c = *(jchar*)tos_addr; break; | |
| 646 case T_SHORT : value_result->s = *(jshort*)tos_addr; break; | |
| 647 case T_INT : value_result->i = *(jint*)tos_addr; break; | |
| 648 case T_LONG : value_result->j = *(jlong*)tos_addr; break; | |
| 649 case T_FLOAT : { | |
| 650 #ifdef AMD64 | |
| 651 value_result->f = *(jfloat*)tos_addr; | |
| 652 #else | |
| 653 if (method->is_native()) { | |
| 654 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat | |
| 655 value_result->f = (jfloat)d; | |
| 656 } else { | |
| 657 value_result->f = *(jfloat*)tos_addr; | |
| 658 } | |
| 659 #endif // AMD64 | |
| 660 break; | |
| 661 } | |
| 662 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; | |
| 663 case T_VOID : /* Nothing to do */ break; | |
| 664 default : ShouldNotReachHere(); | |
| 665 } | |
| 666 | |
| 667 return type; | |
| 668 } | |
| 669 | |
| 670 | |
| 671 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { | |
| 672 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
| 673 return &interpreter_frame_tos_address()[index]; | |
| 674 } |