Mercurial > hg > truffle
annotate src/cpu/sparc/vm/frame_sparc.cpp @ 3273:df22fe9c5a93
Merge
author | coleenp |
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date | Wed, 27 Apr 2011 17:25:45 -0700 |
parents | f95d63e2154a |
children | 2e038ad0c1d0 |
rev | line source |
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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_sparc.inline.hpp" | |
39 #ifdef COMPILER1 | |
40 #include "c1/c1_Runtime1.hpp" | |
41 #include "runtime/vframeArray.hpp" | |
42 #endif | |
0 | 43 |
44 void RegisterMap::pd_clear() { | |
45 if (_thread->has_last_Java_frame()) { | |
46 frame fr = _thread->last_frame(); | |
47 _window = fr.sp(); | |
48 } else { | |
49 _window = NULL; | |
50 } | |
51 _younger_window = NULL; | |
52 } | |
53 | |
54 | |
55 // Unified register numbering scheme: each 32-bits counts as a register | |
56 // number, so all the V9 registers take 2 slots. | |
57 const static int R_L_nums[] = {0+040,2+040,4+040,6+040,8+040,10+040,12+040,14+040}; | |
58 const static int R_I_nums[] = {0+060,2+060,4+060,6+060,8+060,10+060,12+060,14+060}; | |
59 const static int R_O_nums[] = {0+020,2+020,4+020,6+020,8+020,10+020,12+020,14+020}; | |
60 const static int R_G_nums[] = {0+000,2+000,4+000,6+000,8+000,10+000,12+000,14+000}; | |
61 static RegisterMap::LocationValidType bad_mask = 0; | |
62 static RegisterMap::LocationValidType R_LIO_mask = 0; | |
63 static bool register_map_inited = false; | |
64 | |
65 static void register_map_init() { | |
66 if (!register_map_inited) { | |
67 register_map_inited = true; | |
68 int i; | |
69 for (i = 0; i < 8; i++) { | |
70 assert(R_L_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
71 assert(R_I_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
72 assert(R_O_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
73 assert(R_G_nums[i] < RegisterMap::location_valid_type_size, "in first chunk"); | |
74 } | |
75 | |
76 bad_mask |= (1LL << R_O_nums[6]); // SP | |
77 bad_mask |= (1LL << R_O_nums[7]); // cPC | |
78 bad_mask |= (1LL << R_I_nums[6]); // FP | |
79 bad_mask |= (1LL << R_I_nums[7]); // rPC | |
80 bad_mask |= (1LL << R_G_nums[2]); // TLS | |
81 bad_mask |= (1LL << R_G_nums[7]); // reserved by libthread | |
82 | |
83 for (i = 0; i < 8; i++) { | |
84 R_LIO_mask |= (1LL << R_L_nums[i]); | |
85 R_LIO_mask |= (1LL << R_I_nums[i]); | |
86 R_LIO_mask |= (1LL << R_O_nums[i]); | |
87 } | |
88 } | |
89 } | |
90 | |
91 | |
92 address RegisterMap::pd_location(VMReg regname) const { | |
93 register_map_init(); | |
94 | |
95 assert(regname->is_reg(), "sanity check"); | |
96 // Only the GPRs get handled this way | |
97 if( !regname->is_Register()) | |
98 return NULL; | |
99 | |
100 // don't talk about bad registers | |
101 if ((bad_mask & ((LocationValidType)1 << regname->value())) != 0) { | |
102 return NULL; | |
103 } | |
104 | |
105 // Convert to a GPR | |
106 Register reg; | |
107 int second_word = 0; | |
108 // 32-bit registers for in, out and local | |
109 if (!regname->is_concrete()) { | |
110 // HMM ought to return NULL for any non-concrete (odd) vmreg | |
111 // this all tied up in the fact we put out double oopMaps for | |
112 // register locations. When that is fixed we'd will return NULL | |
113 // (or assert here). | |
114 reg = regname->prev()->as_Register(); | |
115 #ifdef _LP64 | |
116 second_word = sizeof(jint); | |
117 #else | |
118 return NULL; | |
119 #endif // _LP64 | |
120 } else { | |
121 reg = regname->as_Register(); | |
122 } | |
123 if (reg->is_out()) { | |
124 assert(_younger_window != NULL, "Younger window should be available"); | |
125 return second_word + (address)&_younger_window[reg->after_save()->sp_offset_in_saved_window()]; | |
126 } | |
127 if (reg->is_local() || reg->is_in()) { | |
128 assert(_window != NULL, "Window should be available"); | |
129 return second_word + (address)&_window[reg->sp_offset_in_saved_window()]; | |
130 } | |
131 // Only the window'd GPRs get handled this way; not the globals. | |
132 return NULL; | |
133 } | |
134 | |
135 | |
136 #ifdef ASSERT | |
137 void RegisterMap::check_location_valid() { | |
138 register_map_init(); | |
139 assert((_location_valid[0] & bad_mask) == 0, "cannot have special locations for SP,FP,TLS,etc."); | |
140 } | |
141 #endif | |
142 | |
143 // We are shifting windows. That means we are moving all %i to %o, | |
144 // getting rid of all current %l, and keeping all %g. This is only | |
145 // complicated if any of the location pointers for these are valid. | |
146 // The normal case is that everything is in its standard register window | |
147 // home, and _location_valid[0] is zero. In that case, this routine | |
148 // does exactly nothing. | |
149 void RegisterMap::shift_individual_registers() { | |
150 if (!update_map()) return; // this only applies to maps with locations | |
151 register_map_init(); | |
152 check_location_valid(); | |
153 | |
154 LocationValidType lv = _location_valid[0]; | |
155 LocationValidType lv0 = lv; | |
156 | |
157 lv &= ~R_LIO_mask; // clear %l, %o, %i regs | |
158 | |
159 // if we cleared some non-%g locations, we may have to do some shifting | |
160 if (lv != lv0) { | |
161 // copy %i0-%i5 to %o0-%o5, if they have special locations | |
162 // This can happen in within stubs which spill argument registers | |
163 // around a dynamic link operation, such as resolve_opt_virtual_call. | |
164 for (int i = 0; i < 8; i++) { | |
165 if (lv0 & (1LL << R_I_nums[i])) { | |
166 _location[R_O_nums[i]] = _location[R_I_nums[i]]; | |
167 lv |= (1LL << R_O_nums[i]); | |
168 } | |
169 } | |
170 } | |
171 | |
172 _location_valid[0] = lv; | |
173 check_location_valid(); | |
174 } | |
175 | |
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176 bool frame::safe_for_sender(JavaThread *thread) { |
0 | 177 |
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178 address _SP = (address) sp(); |
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179 address _FP = (address) fp(); |
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180 address _UNEXTENDED_SP = (address) unextended_sp(); |
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181 // sp must be within the stack |
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182 bool sp_safe = (_SP <= thread->stack_base()) && |
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183 (_SP >= thread->stack_base() - thread->stack_size()); |
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184 |
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185 if (!sp_safe) { |
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186 return false; |
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187 } |
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188 |
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189 // unextended sp must be within the stack and above or equal sp |
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190 bool unextended_sp_safe = (_UNEXTENDED_SP <= thread->stack_base()) && |
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191 (_UNEXTENDED_SP >= _SP); |
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192 |
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193 if (!unextended_sp_safe) return false; |
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194 |
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195 // an fp must be within the stack and above (but not equal) sp |
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196 bool fp_safe = (_FP <= thread->stack_base()) && |
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197 (_FP > _SP); |
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198 |
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199 // We know sp/unextended_sp are safe only fp is questionable here |
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200 |
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201 // If the current frame is known to the code cache then we can attempt to |
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202 // to construct the sender and do some validation of it. This goes a long way |
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203 // toward eliminating issues when we get in frame construction code |
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204 |
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205 if (_cb != NULL ) { |
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206 |
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207 // First check if frame is complete and tester is reliable |
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208 // Unfortunately we can only check frame complete for runtime stubs and nmethod |
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209 // other generic buffer blobs are more problematic so we just assume they are |
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210 // ok. adapter blobs never have a frame complete and are never ok. |
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211 |
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212 if (!_cb->is_frame_complete_at(_pc)) { |
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213 if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
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214 return false; |
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215 } |
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216 } |
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217 |
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218 // Entry frame checks |
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219 if (is_entry_frame()) { |
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220 // an entry frame must have a valid fp. |
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221 |
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222 if (!fp_safe) { |
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223 return false; |
0 | 224 } |
107
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225 |
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226 // Validate the JavaCallWrapper an entry frame must have |
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227 |
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228 address jcw = (address)entry_frame_call_wrapper(); |
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229 |
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230 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > _FP); |
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231 |
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232 return jcw_safe; |
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233 |
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234 } |
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235 |
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236 intptr_t* younger_sp = sp(); |
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237 intptr_t* _SENDER_SP = sender_sp(); // sender is actually just _FP |
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238 bool adjusted_stack = is_interpreted_frame(); |
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239 |
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240 address sender_pc = (address)younger_sp[I7->sp_offset_in_saved_window()] + pc_return_offset; |
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241 |
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242 |
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243 // We must always be able to find a recognizable pc |
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244 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); |
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245 if (sender_pc == NULL || sender_blob == NULL) { |
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246 return false; |
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247 } |
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248 |
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249 // It should be safe to construct the sender though it might not be valid |
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250 |
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251 frame sender(_SENDER_SP, younger_sp, adjusted_stack); |
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252 |
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253 // Do we have a valid fp? |
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254 address sender_fp = (address) sender.fp(); |
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255 |
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256 // an fp must be within the stack and above (but not equal) current frame's _FP |
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257 |
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258 bool sender_fp_safe = (sender_fp <= thread->stack_base()) && |
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259 (sender_fp > _FP); |
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260 |
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261 if (!sender_fp_safe) { |
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262 return false; |
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263 } |
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264 |
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265 |
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266 // If the potential sender is the interpreter then we can do some more checking |
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267 if (Interpreter::contains(sender_pc)) { |
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268 return sender.is_interpreted_frame_valid(thread); |
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269 } |
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270 |
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271 // Could just be some random pointer within the codeBlob |
1748 | 272 if (!sender.cb()->code_contains(sender_pc)) { |
273 return false; | |
274 } | |
107
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275 |
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276 // We should never be able to see an adapter if the current frame is something from code cache |
1748 | 277 if (sender_blob->is_adapter_blob()) { |
107
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278 return false; |
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279 } |
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280 |
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281 if( sender.is_entry_frame()) { |
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282 // Validate the JavaCallWrapper an entry frame must have |
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283 |
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284 address jcw = (address)sender.entry_frame_call_wrapper(); |
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285 |
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286 bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > sender_fp); |
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287 |
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288 return jcw_safe; |
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289 } |
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290 |
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291 // If the frame size is 0 something is bad because every nmethod has a non-zero frame size |
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292 // because you must allocate window space |
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293 |
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294 if (sender_blob->frame_size() == 0) { |
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295 assert(!sender_blob->is_nmethod(), "should count return address at least"); |
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296 return false; |
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297 } |
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298 |
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299 // The sender should positively be an nmethod or call_stub. On sparc we might in fact see something else. |
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300 // The cause of this is because at a save instruction the O7 we get is a leftover from an earlier |
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301 // window use. So if a runtime stub creates two frames (common in fastdebug/jvmg) then we see the |
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302 // stale pc. So if the sender blob is not something we'd expect we have little choice but to declare |
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303 // the stack unwalkable. pd_get_top_frame_for_signal_handler tries to recover from this by unwinding |
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304 // that initial frame and retrying. |
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305 |
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306 if (!sender_blob->is_nmethod()) { |
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307 return false; |
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308 } |
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309 |
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310 // Could put some more validation for the potential non-interpreted sender |
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311 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
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312 |
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313 // 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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314 |
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315 // We've validated the potential sender that would be created |
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316 |
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317 return true; |
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318 |
0 | 319 } |
107
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320 |
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321 // Must be native-compiled frame. Since sender will try and use fp to find |
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322 // linkages it must be safe |
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323 |
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324 if (!fp_safe) return false; |
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325 |
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326 // could try and do some more potential verification of native frame if we could think of some... |
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327 |
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328 return true; |
0 | 329 } |
330 | |
331 // constructors | |
332 | |
333 // Construct an unpatchable, deficient frame | |
334 frame::frame(intptr_t* sp, unpatchable_t, address pc, CodeBlob* cb) { | |
335 #ifdef _LP64 | |
336 assert( (((intptr_t)sp & (wordSize-1)) == 0), "frame constructor passed an invalid sp"); | |
337 #endif | |
338 _sp = sp; | |
339 _younger_sp = NULL; | |
340 _pc = pc; | |
341 _cb = cb; | |
342 _sp_adjustment_by_callee = 0; | |
343 assert(pc == NULL && cb == NULL || pc != NULL, "can't have a cb and no pc!"); | |
344 if (_cb == NULL && _pc != NULL ) { | |
345 _cb = CodeCache::find_blob(_pc); | |
346 } | |
347 _deopt_state = unknown; | |
348 #ifdef ASSERT | |
349 if ( _cb != NULL && _cb->is_nmethod()) { | |
350 // Without a valid unextended_sp() we can't convert the pc to "original" | |
351 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant broken"); | |
352 } | |
353 #endif // ASSERT | |
354 } | |
355 | |
1564 | 356 frame::frame(intptr_t* sp, intptr_t* younger_sp, bool younger_frame_is_interpreted) : |
357 _sp(sp), | |
358 _younger_sp(younger_sp), | |
359 _deopt_state(unknown), | |
360 _sp_adjustment_by_callee(0) { | |
0 | 361 if (younger_sp == NULL) { |
362 // make a deficient frame which doesn't know where its PC is | |
363 _pc = NULL; | |
364 _cb = NULL; | |
365 } else { | |
366 _pc = (address)younger_sp[I7->sp_offset_in_saved_window()] + pc_return_offset; | |
367 assert( (intptr_t*)younger_sp[FP->sp_offset_in_saved_window()] == (intptr_t*)((intptr_t)sp - STACK_BIAS), "younger_sp must be valid"); | |
368 // Any frame we ever build should always "safe" therefore we should not have to call | |
369 // find_blob_unsafe | |
370 // In case of native stubs, the pc retrieved here might be | |
371 // wrong. (the _last_native_pc will have the right value) | |
372 // So do not put add any asserts on the _pc here. | |
373 } | |
1564 | 374 |
375 if (_pc != NULL) | |
376 _cb = CodeCache::find_blob(_pc); | |
377 | |
378 // Check for MethodHandle call sites. | |
379 if (_cb != NULL) { | |
380 nmethod* nm = _cb->as_nmethod_or_null(); | |
381 if (nm != NULL) { | |
382 if (nm->is_deopt_mh_entry(_pc) || nm->is_method_handle_return(_pc)) { | |
383 _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) sp[L7_mh_SP_save->sp_offset_in_saved_window()] + STACK_BIAS) - sp; | |
384 // The SP is already adjusted by this MH call site, don't | |
385 // overwrite this value with the wrong interpreter value. | |
386 younger_frame_is_interpreted = false; | |
387 } | |
388 } | |
0 | 389 } |
390 | |
1564 | 391 if (younger_frame_is_interpreted) { |
392 // compute adjustment to this frame's SP made by its interpreted callee | |
393 _sp_adjustment_by_callee = (intptr_t*) ((intptr_t) younger_sp[I5_savedSP->sp_offset_in_saved_window()] + STACK_BIAS) - sp; | |
394 } | |
0 | 395 |
1564 | 396 // It is important that the frame is fully constructed when we do |
397 // this lookup as get_deopt_original_pc() needs a correct value for | |
398 // unextended_sp() which uses _sp_adjustment_by_callee. | |
0 | 399 if (_pc != NULL) { |
1204 | 400 address original_pc = nmethod::get_deopt_original_pc(this); |
401 if (original_pc != NULL) { | |
402 _pc = original_pc; | |
0 | 403 _deopt_state = is_deoptimized; |
404 } else { | |
405 _deopt_state = not_deoptimized; | |
406 } | |
407 } | |
408 } | |
409 | |
410 bool frame::is_interpreted_frame() const { | |
411 return Interpreter::contains(pc()); | |
412 } | |
413 | |
414 // sender_sp | |
415 | |
416 intptr_t* frame::interpreter_frame_sender_sp() const { | |
417 assert(is_interpreted_frame(), "interpreted frame expected"); | |
418 return fp(); | |
419 } | |
420 | |
421 #ifndef CC_INTERP | |
422 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { | |
423 assert(is_interpreted_frame(), "interpreted frame expected"); | |
424 Unimplemented(); | |
425 } | |
426 #endif // CC_INTERP | |
427 | |
428 | |
429 #ifdef ASSERT | |
430 // Debugging aid | |
431 static frame nth_sender(int n) { | |
432 frame f = JavaThread::current()->last_frame(); | |
433 | |
434 for(int i = 0; i < n; ++i) | |
435 f = f.sender((RegisterMap*)NULL); | |
436 | |
437 printf("first frame %d\n", f.is_first_frame() ? 1 : 0); | |
438 printf("interpreted frame %d\n", f.is_interpreted_frame() ? 1 : 0); | |
439 printf("java frame %d\n", f.is_java_frame() ? 1 : 0); | |
440 printf("entry frame %d\n", f.is_entry_frame() ? 1 : 0); | |
441 printf("native frame %d\n", f.is_native_frame() ? 1 : 0); | |
442 if (f.is_compiled_frame()) { | |
443 if (f.is_deoptimized_frame()) | |
444 printf("deoptimized frame 1\n"); | |
445 else | |
446 printf("compiled frame 1\n"); | |
447 } | |
448 | |
449 return f; | |
450 } | |
451 #endif | |
452 | |
453 | |
454 frame frame::sender_for_entry_frame(RegisterMap *map) const { | |
455 assert(map != NULL, "map must be set"); | |
456 // Java frame called from C; skip all C frames and return top C | |
457 // frame of that chunk as the sender | |
458 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); | |
459 assert(!entry_frame_is_first(), "next Java fp must be non zero"); | |
460 assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack"); | |
461 intptr_t* last_Java_sp = jfa->last_Java_sp(); | |
462 // Since we are walking the stack now this nested anchor is obviously walkable | |
463 // even if it wasn't when it was stacked. | |
464 if (!jfa->walkable()) { | |
465 // Capture _last_Java_pc (if needed) and mark anchor walkable. | |
466 jfa->capture_last_Java_pc(_sp); | |
467 } | |
468 assert(jfa->last_Java_pc() != NULL, "No captured pc!"); | |
469 map->clear(); | |
470 map->make_integer_regs_unsaved(); | |
471 map->shift_window(last_Java_sp, NULL); | |
472 assert(map->include_argument_oops(), "should be set by clear"); | |
473 return frame(last_Java_sp, frame::unpatchable, jfa->last_Java_pc()); | |
474 } | |
475 | |
476 frame frame::sender_for_interpreter_frame(RegisterMap *map) const { | |
477 ShouldNotCallThis(); | |
478 return sender(map); | |
479 } | |
480 | |
481 frame frame::sender_for_compiled_frame(RegisterMap *map) const { | |
482 ShouldNotCallThis(); | |
483 return sender(map); | |
484 } | |
485 | |
486 frame frame::sender(RegisterMap* map) const { | |
487 assert(map != NULL, "map must be set"); | |
488 | |
489 assert(CodeCache::find_blob_unsafe(_pc) == _cb, "inconsistent"); | |
490 | |
491 // Default is not to follow arguments; update it accordingly below | |
492 map->set_include_argument_oops(false); | |
493 | |
494 if (is_entry_frame()) return sender_for_entry_frame(map); | |
495 | |
1564 | 496 intptr_t* younger_sp = sp(); |
497 intptr_t* sp = sender_sp(); | |
0 | 498 |
499 // Note: The version of this operation on any platform with callee-save | |
500 // registers must update the register map (if not null). | |
501 // In order to do this correctly, the various subtypes of | |
502 // of frame (interpreted, compiled, glue, native), | |
503 // must be distinguished. There is no need on SPARC for | |
504 // such distinctions, because all callee-save registers are | |
505 // preserved for all frames via SPARC-specific mechanisms. | |
506 // | |
507 // *** HOWEVER, *** if and when we make any floating-point | |
508 // registers callee-saved, then we will have to copy over | |
509 // the RegisterMap update logic from the Intel code. | |
510 | |
511 // The constructor of the sender must know whether this frame is interpreted so it can set the | |
512 // sender's _sp_adjustment_by_callee field. An osr adapter frame was originally | |
513 // interpreted but its pc is in the code cache (for c1 -> osr_frame_return_id stub), so it must be | |
514 // explicitly recognized. | |
515 | |
1564 | 516 bool frame_is_interpreted = is_interpreted_frame(); |
517 if (frame_is_interpreted) { | |
0 | 518 map->make_integer_regs_unsaved(); |
519 map->shift_window(sp, younger_sp); | |
520 } else if (_cb != NULL) { | |
521 // Update the locations of implicitly saved registers to be their | |
522 // addresses in the register save area. | |
523 // For %o registers, the addresses of %i registers in the next younger | |
524 // frame are used. | |
525 map->shift_window(sp, younger_sp); | |
526 if (map->update_map()) { | |
527 // Tell GC to use argument oopmaps for some runtime stubs that need it. | |
528 // For C1, the runtime stub might not have oop maps, so set this flag | |
529 // outside of update_register_map. | |
530 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); | |
531 if (_cb->oop_maps() != NULL) { | |
532 OopMapSet::update_register_map(this, map); | |
533 } | |
534 } | |
535 } | |
1564 | 536 return frame(sp, younger_sp, frame_is_interpreted); |
0 | 537 } |
538 | |
539 | |
540 void frame::patch_pc(Thread* thread, address pc) { | |
541 if(thread == Thread::current()) { | |
542 StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
543 } | |
544 if (TracePcPatching) { | |
545 // QQQ this assert is invalid (or too strong anyway) sice _pc could | |
546 // be original pc and frame could have the deopt pc. | |
547 // assert(_pc == *O7_addr() + pc_return_offset, "frame has wrong pc"); | |
548 tty->print_cr("patch_pc at address 0x%x [0x%x -> 0x%x] ", O7_addr(), _pc, pc); | |
549 } | |
550 _cb = CodeCache::find_blob(pc); | |
551 *O7_addr() = pc - pc_return_offset; | |
552 _cb = CodeCache::find_blob(_pc); | |
1204 | 553 address original_pc = nmethod::get_deopt_original_pc(this); |
554 if (original_pc != NULL) { | |
555 assert(original_pc == _pc, "expected original to be stored before patching"); | |
0 | 556 _deopt_state = is_deoptimized; |
557 } else { | |
558 _deopt_state = not_deoptimized; | |
559 } | |
560 } | |
561 | |
562 | |
563 static bool sp_is_valid(intptr_t* old_sp, intptr_t* young_sp, intptr_t* sp) { | |
564 return (((intptr_t)sp & (2*wordSize-1)) == 0 && | |
565 sp <= old_sp && | |
566 sp >= young_sp); | |
567 } | |
568 | |
569 | |
570 /* | |
571 Find the (biased) sp that is just younger than old_sp starting at sp. | |
572 If not found return NULL. Register windows are assumed to be flushed. | |
573 */ | |
574 intptr_t* frame::next_younger_sp_or_null(intptr_t* old_sp, intptr_t* sp) { | |
575 | |
576 intptr_t* previous_sp = NULL; | |
577 intptr_t* orig_sp = sp; | |
578 | |
579 int max_frames = (old_sp - sp) / 16; // Minimum frame size is 16 | |
580 int max_frame2 = max_frames; | |
581 while(sp != old_sp && sp_is_valid(old_sp, orig_sp, sp)) { | |
582 if (max_frames-- <= 0) | |
583 // too many frames have gone by; invalid parameters given to this function | |
584 break; | |
585 previous_sp = sp; | |
586 sp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]; | |
587 sp = (intptr_t*)((intptr_t)sp + STACK_BIAS); | |
588 } | |
589 | |
590 return (sp == old_sp ? previous_sp : NULL); | |
591 } | |
592 | |
593 /* | |
594 Determine if "sp" is a valid stack pointer. "sp" is assumed to be younger than | |
595 "valid_sp". So if "sp" is valid itself then it should be possible to walk frames | |
596 from "sp" to "valid_sp". The assumption is that the registers windows for the | |
597 thread stack in question are flushed. | |
598 */ | |
599 bool frame::is_valid_stack_pointer(intptr_t* valid_sp, intptr_t* sp) { | |
600 return next_younger_sp_or_null(valid_sp, sp) != NULL; | |
601 } | |
602 | |
603 | |
604 bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) { | |
605 assert(is_interpreted_frame(), "must be interpreter frame"); | |
606 return this->fp() == fp; | |
607 } | |
608 | |
609 | |
610 void frame::pd_gc_epilog() { | |
611 if (is_interpreted_frame()) { | |
612 // set constant pool cache entry for interpreter | |
613 methodOop m = interpreter_frame_method(); | |
614 | |
615 *interpreter_frame_cpoolcache_addr() = m->constants()->cache(); | |
616 } | |
617 } | |
618 | |
619 | |
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620 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
0 | 621 #ifdef CC_INTERP |
622 // Is there anything to do? | |
623 #else | |
624 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
625 // These are reasonable sanity checks | |
626 if (fp() == 0 || (intptr_t(fp()) & (2*wordSize-1)) != 0) { | |
627 return false; | |
628 } | |
629 if (sp() == 0 || (intptr_t(sp()) & (2*wordSize-1)) != 0) { | |
630 return false; | |
631 } | |
107
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632 |
0 | 633 const intptr_t interpreter_frame_initial_sp_offset = interpreter_frame_vm_local_words; |
634 if (fp() + interpreter_frame_initial_sp_offset < sp()) { | |
635 return false; | |
636 } | |
637 // These are hacks to keep us out of trouble. | |
638 // The problem with these is that they mask other problems | |
639 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above | |
640 return false; | |
641 } | |
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642 // do some validation of frame elements |
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643 |
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644 // first the method |
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645 |
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646 methodOop m = *interpreter_frame_method_addr(); |
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647 |
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648 // validate the method we'd find in this potential sender |
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649 if (!Universe::heap()->is_valid_method(m)) return false; |
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650 |
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651 // stack frames shouldn't be much larger than max_stack elements |
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652 |
1506 | 653 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
0 | 654 return false; |
655 } | |
107
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656 |
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657 // validate bci/bcx |
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658 |
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659 intptr_t bcx = interpreter_frame_bcx(); |
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660 if (m->validate_bci_from_bcx(bcx) < 0) { |
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661 return false; |
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662 } |
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663 |
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664 // validate constantPoolCacheOop |
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665 |
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666 constantPoolCacheOop cp = *interpreter_frame_cache_addr(); |
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667 |
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668 if (cp == NULL || |
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669 !Space::is_aligned(cp) || |
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670 !Universe::heap()->is_permanent((void*)cp)) return false; |
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671 |
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672 // validate locals |
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673 |
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674 address locals = (address) *interpreter_frame_locals_addr(); |
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675 |
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676 if (locals > thread->stack_base() || locals < (address) fp()) return false; |
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677 |
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678 // We'd have to be pretty unlucky to be mislead at this point |
0 | 679 #endif /* CC_INTERP */ |
680 return true; | |
681 } | |
682 | |
683 | |
684 // Windows have been flushed on entry (but not marked). Capture the pc that | |
685 // is the return address to the frame that contains "sp" as its stack pointer. | |
686 // This pc resides in the called of the frame corresponding to "sp". | |
687 // As a side effect we mark this JavaFrameAnchor as having flushed the windows. | |
688 // This side effect lets us mark stacked JavaFrameAnchors (stacked in the | |
689 // call_helper) as flushed when we have flushed the windows for the most | |
690 // recent (i.e. current) JavaFrameAnchor. This saves useless flushing calls | |
691 // and lets us find the pc just once rather than multiple times as it did | |
692 // in the bad old _post_Java_state days. | |
693 // | |
694 void JavaFrameAnchor::capture_last_Java_pc(intptr_t* sp) { | |
695 if (last_Java_sp() != NULL && last_Java_pc() == NULL) { | |
696 // try and find the sp just younger than _last_Java_sp | |
697 intptr_t* _post_Java_sp = frame::next_younger_sp_or_null(last_Java_sp(), sp); | |
698 // Really this should never fail otherwise VM call must have non-standard | |
699 // frame linkage (bad) or stack is not properly flushed (worse). | |
700 guarantee(_post_Java_sp != NULL, "bad stack!"); | |
701 _last_Java_pc = (address) _post_Java_sp[ I7->sp_offset_in_saved_window()] + frame::pc_return_offset; | |
702 | |
703 } | |
704 set_window_flushed(); | |
705 } | |
706 | |
707 void JavaFrameAnchor::make_walkable(JavaThread* thread) { | |
708 if (walkable()) return; | |
709 // Eventually make an assert | |
710 guarantee(Thread::current() == (Thread*)thread, "only current thread can flush its registers"); | |
711 // We always flush in case the profiler wants it but we won't mark | |
712 // the windows as flushed unless we have a last_Java_frame | |
713 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
714 if (last_Java_sp() != NULL ) { | |
715 capture_last_Java_pc(sp); | |
716 } | |
717 } | |
718 | |
719 intptr_t* frame::entry_frame_argument_at(int offset) const { | |
720 // convert offset to index to deal with tsi | |
721 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); | |
722 | |
723 intptr_t* LSP = (intptr_t*) sp()[Lentry_args->sp_offset_in_saved_window()]; | |
724 return &LSP[index+1]; | |
725 } | |
726 | |
727 | |
728 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { | |
729 assert(is_interpreted_frame(), "interpreted frame expected"); | |
730 methodOop method = interpreter_frame_method(); | |
731 BasicType type = method->result_type(); | |
732 | |
733 if (method->is_native()) { | |
734 // Prior to notifying the runtime of the method_exit the possible result | |
735 // value is saved to l_scratch and d_scratch. | |
736 | |
737 #ifdef CC_INTERP | |
738 interpreterState istate = get_interpreterState(); | |
739 intptr_t* l_scratch = (intptr_t*) &istate->_native_lresult; | |
740 intptr_t* d_scratch = (intptr_t*) &istate->_native_fresult; | |
741 #else /* CC_INTERP */ | |
742 intptr_t* l_scratch = fp() + interpreter_frame_l_scratch_fp_offset; | |
743 intptr_t* d_scratch = fp() + interpreter_frame_d_scratch_fp_offset; | |
744 #endif /* CC_INTERP */ | |
745 | |
746 address l_addr = (address)l_scratch; | |
747 #ifdef _LP64 | |
748 // On 64-bit the result for 1/8/16/32-bit result types is in the other | |
749 // word half | |
750 l_addr += wordSize/2; | |
751 #endif | |
752 | |
753 switch (type) { | |
754 case T_OBJECT: | |
755 case T_ARRAY: { | |
756 #ifdef CC_INTERP | |
757 *oop_result = istate->_oop_temp; | |
758 #else | |
759 oop obj = (oop) at(interpreter_frame_oop_temp_offset); | |
760 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
761 *oop_result = obj; | |
762 #endif // CC_INTERP | |
763 break; | |
764 } | |
765 | |
766 case T_BOOLEAN : { jint* p = (jint*)l_addr; value_result->z = (jboolean)((*p) & 0x1); break; } | |
767 case T_BYTE : { jint* p = (jint*)l_addr; value_result->b = (jbyte)((*p) & 0xff); break; } | |
768 case T_CHAR : { jint* p = (jint*)l_addr; value_result->c = (jchar)((*p) & 0xffff); break; } | |
769 case T_SHORT : { jint* p = (jint*)l_addr; value_result->s = (jshort)((*p) & 0xffff); break; } | |
770 case T_INT : value_result->i = *(jint*)l_addr; break; | |
771 case T_LONG : value_result->j = *(jlong*)l_scratch; break; | |
772 case T_FLOAT : value_result->f = *(jfloat*)d_scratch; break; | |
773 case T_DOUBLE : value_result->d = *(jdouble*)d_scratch; break; | |
774 case T_VOID : /* Nothing to do */ break; | |
775 default : ShouldNotReachHere(); | |
776 } | |
777 } else { | |
778 intptr_t* tos_addr = interpreter_frame_tos_address(); | |
779 | |
780 switch(type) { | |
781 case T_OBJECT: | |
782 case T_ARRAY: { | |
783 oop obj = (oop)*tos_addr; | |
784 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); | |
785 *oop_result = obj; | |
786 break; | |
787 } | |
788 case T_BOOLEAN : { jint* p = (jint*)tos_addr; value_result->z = (jboolean)((*p) & 0x1); break; } | |
789 case T_BYTE : { jint* p = (jint*)tos_addr; value_result->b = (jbyte)((*p) & 0xff); break; } | |
790 case T_CHAR : { jint* p = (jint*)tos_addr; value_result->c = (jchar)((*p) & 0xffff); break; } | |
791 case T_SHORT : { jint* p = (jint*)tos_addr; value_result->s = (jshort)((*p) & 0xffff); break; } | |
792 case T_INT : value_result->i = *(jint*)tos_addr; break; | |
793 case T_LONG : value_result->j = *(jlong*)tos_addr; break; | |
794 case T_FLOAT : value_result->f = *(jfloat*)tos_addr; break; | |
795 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; | |
796 case T_VOID : /* Nothing to do */ break; | |
797 default : ShouldNotReachHere(); | |
798 } | |
799 }; | |
800 | |
801 return type; | |
802 } | |
803 | |
804 // Lesp pointer is one word lower than the top item on the stack. | |
805 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { | |
806 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize) - 1; | |
807 return &interpreter_frame_tos_address()[index]; | |
808 } |