Mercurial > hg > truffle
annotate src/cpu/sparc/vm/frame_sparc.cpp @ 11040:f8972b867ded
Merge
author | ehelin |
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date | Thu, 27 Jun 2013 10:56:10 +0200 |
parents | e0c9a1d29eb4 |
children | acfa2cc19146 |
rev | line source |
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0 | 1 /* |
9152 | 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 * | |
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" | |
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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" | |
36 #include "runtime/signature.hpp" | |
37 #include "runtime/stubCodeGenerator.hpp" | |
38 #include "runtime/stubRoutines.hpp" | |
39 #include "vmreg_sparc.inline.hpp" | |
40 #ifdef COMPILER1 | |
41 #include "c1/c1_Runtime1.hpp" | |
42 #include "runtime/vframeArray.hpp" | |
43 #endif | |
0 | 44 |
45 void RegisterMap::pd_clear() { | |
46 if (_thread->has_last_Java_frame()) { | |
47 frame fr = _thread->last_frame(); | |
48 _window = fr.sp(); | |
49 } else { | |
50 _window = NULL; | |
51 } | |
52 _younger_window = NULL; | |
53 } | |
54 | |
55 | |
56 // Unified register numbering scheme: each 32-bits counts as a register | |
57 // number, so all the V9 registers take 2 slots. | |
58 const static int R_L_nums[] = {0+040,2+040,4+040,6+040,8+040,10+040,12+040,14+040}; | |
59 const static int R_I_nums[] = {0+060,2+060,4+060,6+060,8+060,10+060,12+060,14+060}; | |
60 const static int R_O_nums[] = {0+020,2+020,4+020,6+020,8+020,10+020,12+020,14+020}; | |
61 const static int R_G_nums[] = {0+000,2+000,4+000,6+000,8+000,10+000,12+000,14+000}; | |
62 static RegisterMap::LocationValidType bad_mask = 0; | |
63 static RegisterMap::LocationValidType R_LIO_mask = 0; | |
64 static bool register_map_inited = false; | |
65 | |
66 static void register_map_init() { | |
67 if (!register_map_inited) { | |
68 register_map_inited = true; | |
69 int i; | |
70 for (i = 0; i < 8; i++) { | |
71 assert(R_L_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
72 assert(R_I_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
73 assert(R_O_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
74 assert(R_G_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
75 } | |
76 | |
77 bad_mask |= (1LL << R_O_nums[6]); // SP | |
78 bad_mask |= (1LL << R_O_nums[7]); // cPC | |
79 bad_mask |= (1LL << R_I_nums[6]); // FP | |
80 bad_mask |= (1LL << R_I_nums[7]); // rPC | |
81 bad_mask |= (1LL << R_G_nums[2]); // TLS | |
82 bad_mask |= (1LL << R_G_nums[7]); // reserved by libthread | |
83 | |
84 for (i = 0; i < 8; i++) { | |
85 R_LIO_mask |= (1LL << R_L_nums[i]); | |
86 R_LIO_mask |= (1LL << R_I_nums[i]); | |
87 R_LIO_mask |= (1LL << R_O_nums[i]); | |
88 } | |
89 } | |
90 } | |
91 | |
92 | |
93 address RegisterMap::pd_location(VMReg regname) const { | |
94 register_map_init(); | |
95 | |
96 assert(regname->is_reg(), "sanity check"); | |
97 // Only the GPRs get handled this way | |
98 if( !regname->is_Register()) | |
99 return NULL; | |
100 | |
101 // don't talk about bad registers | |
102 if ((bad_mask & ((LocationValidType)1 << regname->value())) != 0) { | |
103 return NULL; | |
104 } | |
105 | |
106 // Convert to a GPR | |
107 Register reg; | |
108 int second_word = 0; | |
109 // 32-bit registers for in, out and local | |
110 if (!regname->is_concrete()) { | |
111 // HMM ought to return NULL for any non-concrete (odd) vmreg | |
112 // this all tied up in the fact we put out double oopMaps for | |
113 // register locations. When that is fixed we'd will return NULL | |
114 // (or assert here). | |
115 reg = regname->prev()->as_Register(); | |
116 #ifdef _LP64 | |
117 second_word = sizeof(jint); | |
118 #else | |
119 return NULL; | |
120 #endif // _LP64 | |
121 } else { | |
122 reg = regname->as_Register(); | |
123 } | |
124 if (reg->is_out()) { | |
125 assert(_younger_window != NULL, "Younger window should be available"); | |
126 return second_word + (address)&_younger_window[reg->after_save()->sp_offset_in_saved_window()]; | |
127 } | |
128 if (reg->is_local() || reg->is_in()) { | |
129 assert(_window != NULL, "Window should be available"); | |
130 return second_word + (address)&_window[reg->sp_offset_in_saved_window()]; | |
131 } | |
132 // Only the window'd GPRs get handled this way; not the globals. | |
133 return NULL; | |
134 } | |
135 | |
136 | |
137 #ifdef ASSERT | |
138 void RegisterMap::check_location_valid() { | |
139 register_map_init(); | |
140 assert((_location_valid[0] & bad_mask) == 0, "cannot have special locations for SP,FP,TLS,etc."); | |
141 } | |
142 #endif | |
143 | |
144 // We are shifting windows. That means we are moving all %i to %o, | |
145 // getting rid of all current %l, and keeping all %g. This is only | |
146 // complicated if any of the location pointers for these are valid. | |
147 // The normal case is that everything is in its standard register window | |
148 // home, and _location_valid[0] is zero. In that case, this routine | |
149 // does exactly nothing. | |
150 void RegisterMap::shift_individual_registers() { | |
151 if (!update_map()) return; // this only applies to maps with locations | |
152 register_map_init(); | |
153 check_location_valid(); | |
154 | |
155 LocationValidType lv = _location_valid[0]; | |
156 LocationValidType lv0 = lv; | |
157 | |
158 lv &= ~R_LIO_mask; // clear %l, %o, %i regs | |
159 | |
160 // if we cleared some non-%g locations, we may have to do some shifting | |
161 if (lv != lv0) { | |
162 // copy %i0-%i5 to %o0-%o5, if they have special locations | |
163 // This can happen in within stubs which spill argument registers | |
164 // around a dynamic link operation, such as resolve_opt_virtual_call. | |
165 for (int i = 0; i < 8; i++) { | |
166 if (lv0 & (1LL << R_I_nums[i])) { | |
167 _location[R_O_nums[i]] = _location[R_I_nums[i]]; | |
168 lv |= (1LL << R_O_nums[i]); | |
169 } | |
170 } | |
171 } | |
172 | |
173 _location_valid[0] = lv; | |
174 check_location_valid(); | |
175 } | |
176 | |
107
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177 bool frame::safe_for_sender(JavaThread *thread) { |
0 | 178 |
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179 address _SP = (address) sp(); |
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180 address _FP = (address) fp(); |
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181 address _UNEXTENDED_SP = (address) unextended_sp(); |
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182 // sp must be within the stack |
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183 bool sp_safe = (_SP <= thread->stack_base()) && |
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184 (_SP >= thread->stack_base() - thread->stack_size()); |
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185 |
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186 if (!sp_safe) { |
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187 return false; |
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188 } |
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189 |
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190 // unextended sp must be within the stack and above or equal sp |
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191 bool unextended_sp_safe = (_UNEXTENDED_SP <= thread->stack_base()) && |
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192 (_UNEXTENDED_SP >= _SP); |
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193 |
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194 if (!unextended_sp_safe) return false; |
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195 |
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196 // an fp must be within the stack and above (but not equal) sp |
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197 bool fp_safe = (_FP <= thread->stack_base()) && |
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198 (_FP > _SP); |
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199 |
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200 // We know sp/unextended_sp are safe only fp is questionable here |
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201 |
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202 // If the current frame is known to the code cache then we can attempt to |
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203 // to construct the sender and do some validation of it. This goes a long way |
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204 // toward eliminating issues when we get in frame construction code |
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205 |
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206 if (_cb != NULL ) { |
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207 |
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208 // First check if frame is complete and tester is reliable |
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209 // Unfortunately we can only check frame complete for runtime stubs and nmethod |
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210 // other generic buffer blobs are more problematic so we just assume they are |
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211 // ok. adapter blobs never have a frame complete and are never ok. |
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212 |
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213 if (!_cb->is_frame_complete_at(_pc)) { |
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214 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
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215 return false; |
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216 } |
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217 } |
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218 |
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219 // Could just be some random pointer within the codeBlob |
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220 if (!_cb->code_contains(_pc)) { |
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221 return false; |
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222 } |
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223 |
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224 // Entry frame checks |
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225 if (is_entry_frame()) { |
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226 // an entry frame must have a valid fp. |
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227 |
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228 if (!fp_safe) { |
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229 return false; |
0 | 230 } |
107
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231 |
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232 // Validate the JavaCallWrapper an entry frame must have |
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233 |
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234 address jcw = (address)entry_frame_call_wrapper(); |
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235 |
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236 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > _FP); |
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237 |
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238 return jcw_safe; |
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239 |
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240 } |
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241 |
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242 intptr_t* younger_sp = sp(); |
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243 intptr_t* _SENDER_SP = sender_sp(); // sender is actually just _FP |
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244 bool adjusted_stack = is_interpreted_frame(); |
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245 |
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246 address sender_pc = (address)younger_sp[I7->sp_offset_in_saved_window()] + pc_return_offset; |
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247 |
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248 |
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249 // We must always be able to find a recognizable pc |
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250 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); |
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251 if (sender_pc == NULL || sender_blob == NULL) { |
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252 return false; |
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253 } |
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254 |
10405 | 255 // Could be a zombie method |
256 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { | |
257 return false; | |
258 } | |
259 | |
260 // Could be a zombie method | |
261 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { | |
262 return false; | |
263 } | |
264 | |
107
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265 // It should be safe to construct the sender though it might not be valid |
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266 |
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267 frame sender(_SENDER_SP, younger_sp, adjusted_stack); |
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268 |
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269 // Do we have a valid fp? |
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270 address sender_fp = (address) sender.fp(); |
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271 |
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272 // an fp must be within the stack and above (but not equal) current frame's _FP |
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273 |
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274 bool sender_fp_safe = (sender_fp <= thread->stack_base()) && |
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275 (sender_fp > _FP); |
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276 |
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277 if (!sender_fp_safe) { |
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278 return false; |
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279 } |
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280 |
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281 |
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282 // If the potential sender is the interpreter then we can do some more checking |
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283 if (Interpreter::contains(sender_pc)) { |
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284 return sender.is_interpreted_frame_valid(thread); |
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285 } |
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286 |
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287 // Could just be some random pointer within the codeBlob |
1748 | 288 if (!sender.cb()->code_contains(sender_pc)) { |
289 return false; | |
290 } | |
107
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291 |
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292 // We should never be able to see an adapter if the current frame is something from code cache |
1748 | 293 if (sender_blob->is_adapter_blob()) { |
107
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294 return false; |
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295 } |
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296 |
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297 if( sender.is_entry_frame()) { |
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298 // Validate the JavaCallWrapper an entry frame must have |
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299 |
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300 address jcw = (address)sender.entry_frame_call_wrapper(); |
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301 |
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302 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > sender_fp); |
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303 |
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304 return jcw_safe; |
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305 } |
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306 |
10405 | 307 // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size |
107
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308 // because you must allocate window space |
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309 |
10405 | 310 if (sender_blob->frame_size() <= 0) { |
107
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311 assert(!sender_blob->is_nmethod(), "should count return address at least"); |
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312 return false; |
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313 } |
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314 |
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315 // The sender should positively be an nmethod or call_stub. On sparc we might in fact see something else. |
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316 // The cause of this is because at a save instruction the O7 we get is a leftover from an earlier |
9152 | 317 // window use. So if a runtime stub creates two frames (common in fastdebug/debug) then we see the |
107
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318 // stale pc. So if the sender blob is not something we'd expect we have little choice but to declare |
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319 // the stack unwalkable. pd_get_top_frame_for_signal_handler tries to recover from this by unwinding |
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320 // that initial frame and retrying. |
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321 |
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322 if (!sender_blob->is_nmethod()) { |
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323 return false; |
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324 } |
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325 |
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326 // Could put some more validation for the potential non-interpreted sender |
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327 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
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328 |
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329 // 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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330 |
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331 // We've validated the potential sender that would be created |
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332 |
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333 return true; |
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334 |
0 | 335 } |
107
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336 |
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337 // Must be native-compiled frame. Since sender will try and use fp to find |
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338 // linkages it must be safe |
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339 |
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340 if (!fp_safe) return false; |
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341 |
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342 // could try and do some more potential verification of native frame if we could think of some... |
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343 |
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344 return true; |
0 | 345 } |
346 | |
347 // constructors | |
348 | |
349 // Construct an unpatchable, deficient frame | |
350 frame::frame(intptr_t* sp, unpatchable_t, address pc, CodeBlob* cb) { | |
351 #ifdef _LP64 | |
352 assert( (((intptr_t)sp & (wordSize-1)) == 0), "frame constructor passed an invalid sp"); | |
353 #endif | |
354 _sp = sp; | |
355 _younger_sp = NULL; | |
356 _pc = pc; | |
357 _cb = cb; | |
358 _sp_adjustment_by_callee = 0; | |
359 assert(pc == NULL && cb == NULL || pc != NULL, "can't have a cb and no pc!"); | |
360 if (_cb == NULL && _pc != NULL ) { | |
361 _cb = CodeCache::find_blob(_pc); | |
362 } | |
363 _deopt_state = unknown; | |
364 #ifdef ASSERT | |
365 if ( _cb != NULL && _cb->is_nmethod()) { | |
366 // Without a valid unextended_sp() we can't convert the pc to "original" | |
367 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant broken"); | |
368 } | |
369 #endif // ASSERT | |
370 } | |
371 | |
1564 | 372 frame::frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_is_interpreted) : |
373 _sp(sp), | |
374 _younger_sp(younger_sp), | |
375 _deopt_state(unknown), | |
376 _sp_adjustment_by_callee(0) { | |
0 | 377 if (younger_sp == NULL) { |
378 // make a deficient frame which doesn't know where its PC is | |
379 _pc = NULL; | |
380 _cb = NULL; | |
381 } else { | |
382 _pc = (address)younger_sp[I7->sp_offset_in_saved_window()] + pc_return_offset; | |
383 assert( (intptr_t*)younger_sp[FP->sp_offset_in_saved_window()] == (intptr_t*)((intptr_t)sp - STACK_BIAS), "younger_sp must be valid"); | |
384 // Any frame we ever build should always "safe" therefore we should not have to call | |
385 // find_blob_unsafe | |
386 // In case of native stubs, the pc retrieved here might be | |
387 // wrong. (the _last_native_pc will have the right value) | |
388 // So do not put add any asserts on the _pc here. | |
389 } | |
1564 | 390 |
391 if (_pc != NULL) | |
392 _cb = CodeCache::find_blob(_pc); | |
393 | |
394 // Check for MethodHandle call sites. | |
395 if (_cb != NULL) { | |
396 nmethod* nm = _cb->as_nmethod_or_null(); | |
397 if (nm != NULL) { | |
398 if (nm->is_deopt_mh_entry(_pc) || nm->is_method_handle_return(_pc)) { | |
399 _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) sp[L7_mh_SP_save->sp_offset_in_saved_window()] + STACK_BIAS) - sp; | |
400 // The SP is already adjusted by this MH call site, don't | |
401 // overwrite this value with the wrong interpreter value. | |
402 younger_frame_is_interpreted = false; | |
403 } | |
404 } | |
0 | 405 } |
406 | |
1564 | 407 if (younger_frame_is_interpreted) { |
408 // compute adjustment to this frame's SP made by its interpreted callee | |
409 _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) younger_sp[I5_savedSP->sp_offset_in_saved_window()] + STACK_BIAS) - sp; | |
410 } | |
0 | 411 |
1564 | 412 // It is important that the frame is fully constructed when we do |
413 // this lookup as get_deopt_original_pc() needs a correct value for | |
414 // unextended_sp() which uses _sp_adjustment_by_callee. | |
0 | 415 if (_pc != NULL) { |
1204 | 416 address original_pc = nmethod::get_deopt_original_pc(this); |
417 if (original_pc != NULL) { | |
418 _pc = original_pc; | |
0 | 419 _deopt_state = is_deoptimized; |
420 } else { | |
421 _deopt_state = not_deoptimized; | |
422 } | |
423 } | |
424 } | |
425 | |
426 bool frame::is_interpreted_frame() const { | |
427 return Interpreter::contains(pc()); | |
428 } | |
429 | |
430 // sender_sp | |
431 | |
432 intptr_t* frame::interpreter_frame_sender_sp() const { | |
433 assert(is_interpreted_frame(), "interpreted frame expected"); | |
434 return fp(); | |
435 } | |
436 | |
437 #ifndef CC_INTERP | |
438 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { | |
439 assert(is_interpreted_frame(), "interpreted frame expected"); | |
440 Unimplemented(); | |
441 } | |
442 #endif // CC_INTERP | |
443 | |
444 | |
445 #ifdef ASSERT | |
446 // Debugging aid | |
447 static frame nth_sender(int n) { | |
448 frame f = JavaThread::current()->last_frame(); | |
449 | |
450 for(int i = 0; i < n; ++i) | |
451 f = f.sender((RegisterMap*)NULL); | |
452 | |
453 printf("first frame %d\n", f.is_first_frame() ? 1 : 0); | |
454 printf("interpreted frame %d\n", f.is_interpreted_frame() ? 1 : 0); | |
455 printf("java frame %d\n", f.is_java_frame() ? 1 : 0); | |
456 printf("entry frame %d\n", f.is_entry_frame() ? 1 : 0); | |
457 printf("native frame %d\n", f.is_native_frame() ? 1 : 0); | |
458 if (f.is_compiled_frame()) { | |
459 if (f.is_deoptimized_frame()) | |
460 printf("deoptimized frame 1\n"); | |
461 else | |
462 printf("compiled frame 1\n"); | |
463 } | |
464 | |
465 return f; | |
466 } | |
467 #endif | |
468 | |
469 | |
470 frame frame::sender_for_entry_frame(RegisterMap *map) const { | |
471 assert(map != NULL, "map must be set"); | |
472 // Java frame called from C; skip all C frames and return top C | |
473 // frame of that chunk as the sender | |
474 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); | |
475 assert(!entry_frame_is_first(), "next Java fp must be non zero"); | |
476 assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack"); | |
477 intptr_t* last_Java_sp = jfa->last_Java_sp(); | |
478 // Since we are walking the stack now this nested anchor is obviously walkable | |
479 // even if it wasn't when it was stacked. | |
480 if (!jfa->walkable()) { | |
481 // Capture _last_Java_pc (if needed) and mark anchor walkable. | |
482 jfa->capture_last_Java_pc(_sp); | |
483 } | |
484 assert(jfa->last_Java_pc() != NULL, "No captured pc!"); | |
485 map->clear(); | |
486 map->make_integer_regs_unsaved(); | |
487 map->shift_window(last_Java_sp, NULL); | |
488 assert(map->include_argument_oops(), "should be set by clear"); | |
489 return frame(last_Java_sp, frame::unpatchable, jfa->last_Java_pc()); | |
490 } | |
491 | |
492 frame frame::sender_for_interpreter_frame(RegisterMap *map) const { | |
493 ShouldNotCallThis(); | |
494 return sender(map); | |
495 } | |
496 | |
497 frame frame::sender_for_compiled_frame(RegisterMap *map) const { | |
498 ShouldNotCallThis(); | |
499 return sender(map); | |
500 } | |
501 | |
502 frame frame::sender(RegisterMap* map) const { | |
503 assert(map != NULL, "map must be set"); | |
504 | |
505 assert(CodeCache::find_blob_unsafe(_pc) == _cb, "inconsistent"); | |
506 | |
507 // Default is not to follow arguments; update it accordingly below | |
508 map->set_include_argument_oops(false); | |
509 | |
510 if (is_entry_frame()) return sender_for_entry_frame(map); | |
511 | |
1564 | 512 intptr_t* younger_sp = sp(); |
513 intptr_t* sp = sender_sp(); | |
0 | 514 |
515 // Note: The version of this operation on any platform with callee-save | |
516 // registers must update the register map (if not null). | |
517 // In order to do this correctly, the various subtypes of | |
518 // of frame (interpreted, compiled, glue, native), | |
519 // must be distinguished. There is no need on SPARC for | |
520 // such distinctions, because all callee-save registers are | |
521 // preserved for all frames via SPARC-specific mechanisms. | |
522 // | |
523 // *** HOWEVER, *** if and when we make any floating-point | |
524 // registers callee-saved, then we will have to copy over | |
525 // the RegisterMap update logic from the Intel code. | |
526 | |
527 // The constructor of the sender must know whether this frame is interpreted so it can set the | |
528 // sender's _sp_adjustment_by_callee field. An osr adapter frame was originally | |
529 // interpreted but its pc is in the code cache (for c1 -> osr_frame_return_id stub), so it must be | |
530 // explicitly recognized. | |
531 | |
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532 |
1564 | 533 bool frame_is_interpreted = is_interpreted_frame(); |
534 if (frame_is_interpreted) { | |
0 | 535 map->make_integer_regs_unsaved(); |
536 map->shift_window(sp, younger_sp); | |
537 } else if (_cb != NULL) { | |
538 // Update the locations of implicitly saved registers to be their | |
539 // addresses in the register save area. | |
540 // For %o registers, the addresses of %i registers in the next younger | |
541 // frame are used. | |
542 map->shift_window(sp, younger_sp); | |
543 if (map->update_map()) { | |
544 // Tell GC to use argument oopmaps for some runtime stubs that need it. | |
545 // For C1, the runtime stub might not have oop maps, so set this flag | |
546 // outside of update_register_map. | |
547 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); | |
548 if (_cb->oop_maps() != NULL) { | |
549 OopMapSet::update_register_map(this, map); | |
550 } | |
551 } | |
552 } | |
1564 | 553 return frame(sp, younger_sp, frame_is_interpreted); |
0 | 554 } |
555 | |
556 | |
557 void frame::patch_pc(Thread* thread, address pc) { | |
558 if(thread == Thread::current()) { | |
559 StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
560 } | |
561 if (TracePcPatching) { | |
562 // QQQ this assert is invalid (or too strong anyway) sice _pc could | |
563 // be original pc and frame could have the deopt pc. | |
564 // assert(_pc == *O7_addr() + pc_return_offset, "frame has wrong pc"); | |
565 tty->print_cr("patch_pc at address 0x%x [0x%x -> 0x%x] ", O7_addr(), _pc, pc); | |
566 } | |
567 _cb = CodeCache::find_blob(pc); | |
568 *O7_addr() = pc - pc_return_offset; | |
569 _cb = CodeCache::find_blob(_pc); | |
1204 | 570 address original_pc = nmethod::get_deopt_original_pc(this); |
571 if (original_pc != NULL) { | |
572 assert(original_pc == _pc, "expected original to be stored before patching"); | |
0 | 573 _deopt_state = is_deoptimized; |
574 } else { | |
575 _deopt_state = not_deoptimized; | |
576 } | |
577 } | |
578 | |
579 | |
580 static bool sp_is_valid(intptr_t* old_sp, intptr_t* young_sp, intptr_t* sp) { | |
581 return (((intptr_t)sp & (2*wordSize-1)) == 0 && | |
582 sp <= old_sp && | |
583 sp >= young_sp); | |
584 } | |
585 | |
586 | |
587 /* | |
588 Find the (biased) sp that is just younger than old_sp starting at sp. | |
589 If not found return NULL. Register windows are assumed to be flushed. | |
590 */ | |
591 intptr_t* frame::next_younger_sp_or_null(intptr_t* old_sp, intptr_t* sp) { | |
592 | |
593 intptr_t* previous_sp = NULL; | |
594 intptr_t* orig_sp = sp; | |
595 | |
596 int max_frames = (old_sp - sp) / 16; // Minimum frame size is 16 | |
597 int max_frame2 = max_frames; | |
598 while(sp != old_sp && sp_is_valid(old_sp, orig_sp, sp)) { | |
599 if (max_frames-- <= 0) | |
600 // too many frames have gone by; invalid parameters given to this function | |
601 break; | |
602 previous_sp = sp; | |
603 sp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]; | |
604 sp = (intptr_t*)((intptr_t)sp + STACK_BIAS); | |
605 } | |
606 | |
607 return (sp == old_sp ? previous_sp : NULL); | |
608 } | |
609 | |
610 /* | |
611 Determine if "sp" is a valid stack pointer. "sp" is assumed to be younger than | |
612 "valid_sp". So if "sp" is valid itself then it should be possible to walk frames | |
613 from "sp" to "valid_sp". The assumption is that the registers windows for the | |
614 thread stack in question are flushed. | |
615 */ | |
616 bool frame::is_valid_stack_pointer(intptr_t* valid_sp, intptr_t* sp) { | |
617 return next_younger_sp_or_null(valid_sp, sp) != NULL; | |
618 } | |
619 | |
620 | |
621 bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) { | |
622 assert(is_interpreted_frame(), "must be interpreter frame"); | |
623 return this->fp() == fp; | |
624 } | |
625 | |
626 | |
627 void frame::pd_gc_epilog() { | |
628 if (is_interpreted_frame()) { | |
629 // set constant pool cache entry for interpreter | |
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630 Method* m = interpreter_frame_method(); |
0 | 631 |
632 *interpreter_frame_cpoolcache_addr() = m->constants()->cache(); | |
633 } | |
634 } | |
635 | |
636 | |
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637 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
0 | 638 #ifdef CC_INTERP |
639 // Is there anything to do? | |
640 #else | |
641 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
642 // These are reasonable sanity checks | |
643 if (fp() == 0 || (intptr_t(fp()) & (2*wordSize-1)) != 0) { | |
644 return false; | |
645 } | |
646 if (sp() == 0 || (intptr_t(sp()) & (2*wordSize-1)) != 0) { | |
647 return false; | |
648 } | |
107
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649 |
0 | 650 const intptr_t interpreter_frame_initial_sp_offset = interpreter_frame_vm_local_words; |
651 if (fp() + interpreter_frame_initial_sp_offset < sp()) { | |
652 return false; | |
653 } | |
654 // These are hacks to keep us out of trouble. | |
655 // The problem with these is that they mask other problems | |
656 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above | |
657 return false; | |
658 } | |
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659 // do some validation of frame elements |
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660 |
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661 // first the method |
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662 |
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663 Method* m = *interpreter_frame_method_addr(); |
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664 |
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665 // validate the method we'd find in this potential sender |
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666 if (!m->is_valid_method()) return false; |
107
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667 |
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668 // stack frames shouldn't be much larger than max_stack elements |
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669 |
1506 | 670 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
0 | 671 return false; |
672 } | |
107
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673 |
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674 // validate bci/bcx |
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675 |
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676 intptr_t bcx = interpreter_frame_bcx(); |
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677 if (m->validate_bci_from_bcx(bcx) < 0) { |
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678 return false; |
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679 } |
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680 |
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681 // validate ConstantPoolCache* |
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682 ConstantPoolCache* cp = *interpreter_frame_cache_addr(); |
11034 | 683 if (cp == NULL || !cp->is_metaspace_object()) return false; |
107
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684 |
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685 // validate locals |
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686 |
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687 address locals = (address) *interpreter_frame_locals_addr(); |
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688 |
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689 if (locals > thread->stack_base() || locals < (address) fp()) return false; |
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690 |
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691 // We'd have to be pretty unlucky to be mislead at this point |
0 | 692 #endif /* CC_INTERP */ |
693 return true; | |
694 } | |
695 | |
696 | |
697 // Windows have been flushed on entry (but not marked). Capture the pc that | |
698 // is the return address to the frame that contains "sp" as its stack pointer. | |
699 // This pc resides in the called of the frame corresponding to "sp". | |
700 // As a side effect we mark this JavaFrameAnchor as having flushed the windows. | |
701 // This side effect lets us mark stacked JavaFrameAnchors (stacked in the | |
702 // call_helper) as flushed when we have flushed the windows for the most | |
703 // recent (i.e. current) JavaFrameAnchor. This saves useless flushing calls | |
704 // and lets us find the pc just once rather than multiple times as it did | |
705 // in the bad old _post_Java_state days. | |
706 // | |
707 void JavaFrameAnchor::capture_last_Java_pc(intptr_t* sp) { | |
708 if (last_Java_sp() != NULL && last_Java_pc() == NULL) { | |
709 // try and find the sp just younger than _last_Java_sp | |
710 intptr_t* _post_Java_sp = frame::next_younger_sp_or_null(last_Java_sp(), sp); | |
711 // Really this should never fail otherwise VM call must have non-standard | |
712 // frame linkage (bad) or stack is not properly flushed (worse). | |
713 guarantee(_post_Java_sp != NULL, "bad stack!"); | |
714 _last_Java_pc = (address) _post_Java_sp[ I7->sp_offset_in_saved_window()] + frame::pc_return_offset; | |
715 | |
716 } | |
717 set_window_flushed(); | |
718 } | |
719 | |
720 void JavaFrameAnchor::make_walkable(JavaThread* thread) { | |
721 if (walkable()) return; | |
722 // Eventually make an assert | |
723 guarantee(Thread::current() == (Thread*)thread, "only current thread can flush its registers"); | |
724 // We always flush in case the profiler wants it but we won't mark | |
725 // the windows as flushed unless we have a last_Java_frame | |
726 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
727 if (last_Java_sp() != NULL ) { | |
728 capture_last_Java_pc(sp); | |
729 } | |
730 } | |
731 | |
732 intptr_t* frame::entry_frame_argument_at(int offset) const { | |
733 // convert offset to index to deal with tsi | |
734 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
735 | |
736 intptr_t* LSP = (intptr_t*) sp()[Lentry_args->sp_offset_in_saved_window()]; | |
737 return &LSP[index+1]; | |
738 } | |
739 | |
740 | |
741 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { | |
742 assert(is_interpreted_frame(), "interpreted frame expected"); | |
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743 Method* method = interpreter_frame_method(); |
0 | 744 BasicType type = method->result_type(); |
745 | |
746 if (method->is_native()) { | |
747 // Prior to notifying the runtime of the method_exit the possible result | |
748 // value is saved to l_scratch and d_scratch. | |
749 | |
750 #ifdef CC_INTERP | |
751 interpreterState istate = get_interpreterState(); | |
752 intptr_t* l_scratch = (intptr_t*) &istate->_native_lresult; | |
753 intptr_t* d_scratch = (intptr_t*) &istate->_native_fresult; | |
754 #else /* CC_INTERP */ | |
755 intptr_t* l_scratch = fp() + interpreter_frame_l_scratch_fp_offset; | |
756 intptr_t* d_scratch = fp() + interpreter_frame_d_scratch_fp_offset; | |
757 #endif /* CC_INTERP */ | |
758 | |
759 address l_addr = (address)l_scratch; | |
760 #ifdef _LP64 | |
761 // On 64-bit the result for 1/8/16/32-bit result types is in the other | |
762 // word half | |
763 l_addr += wordSize/2; | |
764 #endif | |
765 | |
766 switch (type) { | |
767 case T_OBJECT: | |
768 case T_ARRAY: { | |
769 #ifdef CC_INTERP | |
770 *oop_result = istate->_oop_temp; | |
771 #else | |
772 oop obj = (oop) at(interpreter_frame_oop_temp_offset); | |
773 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
774 *oop_result = obj; | |
775 #endif // CC_INTERP | |
776 break; | |
777 } | |
778 | |
779 case T_BOOLEAN : { jint* p = (jint*)l_addr; value_result->z = (jboolean)((*p) & 0x1); break; } | |
780 case T_BYTE : { jint* p = (jint*)l_addr; value_result->b = (jbyte)((*p) & 0xff); break; } | |
781 case T_CHAR : { jint* p = (jint*)l_addr; value_result->c = (jchar)((*p) & 0xffff); break; } | |
782 case T_SHORT : { jint* p = (jint*)l_addr; value_result->s = (jshort)((*p) & 0xffff); break; } | |
783 case T_INT : value_result->i = *(jint*)l_addr; break; | |
784 case T_LONG : value_result->j = *(jlong*)l_scratch; break; | |
785 case T_FLOAT : value_result->f = *(jfloat*)d_scratch; break; | |
786 case T_DOUBLE : value_result->d = *(jdouble*)d_scratch; break; | |
787 case T_VOID : /* Nothing to do */ break; | |
788 default : ShouldNotReachHere(); | |
789 } | |
790 } else { | |
791 intptr_t* tos_addr = interpreter_frame_tos_address(); | |
792 | |
793 switch(type) { | |
794 case T_OBJECT: | |
795 case T_ARRAY: { | |
796 oop obj = (oop)*tos_addr; | |
797 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
798 *oop_result = obj; | |
799 break; | |
800 } | |
801 case T_BOOLEAN : { jint* p = (jint*)tos_addr; value_result->z = (jboolean)((*p) & 0x1); break; } | |
802 case T_BYTE : { jint* p = (jint*)tos_addr; value_result->b = (jbyte)((*p) & 0xff); break; } | |
803 case T_CHAR : { jint* p = (jint*)tos_addr; value_result->c = (jchar)((*p) & 0xffff); break; } | |
804 case T_SHORT : { jint* p = (jint*)tos_addr; value_result->s = (jshort)((*p) & 0xffff); break; } | |
805 case T_INT : value_result->i = *(jint*)tos_addr; break; | |
806 case T_LONG : value_result->j = *(jlong*)tos_addr; break; | |
807 case T_FLOAT : value_result->f = *(jfloat*)tos_addr; break; | |
808 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; | |
809 case T_VOID : /* Nothing to do */ break; | |
810 default : ShouldNotReachHere(); | |
811 } | |
812 }; | |
813 | |
814 return type; | |
815 } | |
816 | |
817 // Lesp pointer is one word lower than the top item on the stack. | |
818 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { | |
819 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize) - 1; | |
820 return &interpreter_frame_tos_address()[index]; | |
821 } | |
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822 |
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823 |
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824 #ifndef PRODUCT |
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825 |
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826 #define DESCRIBE_FP_OFFSET(name) \ |
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827 values.describe(frame_no, fp() + frame::name##_offset, #name) |
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828 |
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829 void frame::describe_pd(FrameValues& values, int frame_no) { |
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830 for (int w = 0; w < frame::register_save_words; w++) { |
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831 values.describe(frame_no, sp() + w, err_msg("register save area word %d", w), 1); |
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832 } |
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833 |
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834 if (is_interpreted_frame()) { |
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835 DESCRIBE_FP_OFFSET(interpreter_frame_d_scratch_fp); |
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836 DESCRIBE_FP_OFFSET(interpreter_frame_l_scratch_fp); |
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837 DESCRIBE_FP_OFFSET(interpreter_frame_padding); |
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838 DESCRIBE_FP_OFFSET(interpreter_frame_oop_temp); |
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839 |
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840 // esp, according to Lesp (e.g. not depending on bci), if seems valid |
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841 intptr_t* esp = *interpreter_frame_esp_addr(); |
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842 if ((esp >= sp()) && (esp < fp())) { |
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843 values.describe(-1, esp, "*Lesp"); |
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844 } |
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845 } |
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846 |
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847 if (!is_compiled_frame()) { |
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848 if (frame::callee_aggregate_return_pointer_words != 0) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
849 values.describe(frame_no, sp() + frame::callee_aggregate_return_pointer_sp_offset, "callee_aggregate_return_pointer_word"); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
850 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
851 for (int w = 0; w < frame::callee_register_argument_save_area_words; w++) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
852 values.describe(frame_no, sp() + frame::callee_register_argument_save_area_sp_offset + w, |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
853 err_msg("callee_register_argument_save_area_words %d", w)); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
854 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
855 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
856 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
857 |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
1972
diff
changeset
|
858 #endif |
3931
5432047c7db7
7087445: Improve platform independence of JSR292 shared code
bdelsart
parents:
3753
diff
changeset
|
859 |
5432047c7db7
7087445: Improve platform independence of JSR292 shared code
bdelsart
parents:
3753
diff
changeset
|
860 intptr_t *frame::initial_deoptimization_info() { |
5432047c7db7
7087445: Improve platform independence of JSR292 shared code
bdelsart
parents:
3753
diff
changeset
|
861 // unused... but returns fp() to minimize changes introduced by 7087445 |
5432047c7db7
7087445: Improve platform independence of JSR292 shared code
bdelsart
parents:
3753
diff
changeset
|
862 return fp(); |
5432047c7db7
7087445: Improve platform independence of JSR292 shared code
bdelsart
parents:
3753
diff
changeset
|
863 } |