Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 14586:d2fe05d5cc96
added support for lazy computation of names for use with Debug
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 18 Mar 2014 17:15:06 +0100 |
parents | b6aa8c4972aa |
children | b51e29501f30 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/compiledIC.hpp" | |
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28 #include "code/dependencies.hpp" |
1972 | 29 #include "code/nmethod.hpp" |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
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32 #include "compiler/compileBroker.hpp" |
1972 | 33 #include "compiler/compileLog.hpp" |
34 #include "compiler/compilerOracle.hpp" | |
35 #include "compiler/disassembler.hpp" | |
36 #include "interpreter/bytecode.hpp" | |
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37 #include "oops/methodData.hpp" |
1972 | 38 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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39 #include "prims/jvmtiImpl.hpp" |
1972 | 40 #include "runtime/sharedRuntime.hpp" |
41 #include "runtime/sweeper.hpp" | |
42 #include "utilities/dtrace.hpp" | |
43 #include "utilities/events.hpp" | |
44 #include "utilities/xmlstream.hpp" | |
45 #ifdef SHARK | |
46 #include "shark/sharkCompiler.hpp" | |
47 #endif | |
9707 | 48 #ifdef GRAAL |
49 #include "graal/graalJavaAccess.hpp" | |
50 #endif | |
0 | 51 |
52 #ifdef DTRACE_ENABLED | |
53 | |
54 // Only bother with this argument setup if dtrace is available | |
55 | |
4006 | 56 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ |
57 { \ | |
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58 Method* m = (method); \ |
4006 | 59 if (m != NULL) { \ |
60 Symbol* klass_name = m->klass_name(); \ | |
61 Symbol* name = m->name(); \ | |
62 Symbol* signature = m->signature(); \ | |
63 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
64 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
65 (char *) name->bytes(), name->utf8_length(), \ | |
66 (char *) signature->bytes(), signature->utf8_length()); \ | |
67 } \ | |
68 } | |
0 | 69 |
70 #else // ndef DTRACE_ENABLED | |
71 | |
72 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
73 | |
74 #endif | |
75 | |
76 bool nmethod::is_compiled_by_c1() const { | |
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77 if (compiler() == NULL) { |
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78 return false; |
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79 } |
0 | 80 return compiler()->is_c1(); |
81 } | |
9707 | 82 bool nmethod::is_compiled_by_graal() const { |
83 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing | |
84 if (is_native_method()) return false; | |
85 return compiler()->is_graal(); | |
86 } | |
0 | 87 bool nmethod::is_compiled_by_c2() const { |
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88 if (compiler() == NULL) { |
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89 return false; |
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90 } |
0 | 91 return compiler()->is_c2(); |
92 } | |
1692 | 93 bool nmethod::is_compiled_by_shark() const { |
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94 if (compiler() == NULL) { |
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95 return false; |
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96 } |
1692 | 97 return compiler()->is_shark(); |
98 } | |
0 | 99 |
100 | |
101 | |
102 //--------------------------------------------------------------------------------- | |
103 // NMethod statistics | |
104 // They are printed under various flags, including: | |
105 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
106 // (In the latter two cases, they like other stats are printed to the log only.) | |
107 | |
108 #ifndef PRODUCT | |
109 // These variables are put into one block to reduce relocations | |
110 // and make it simpler to print from the debugger. | |
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111 struct java_nmethod_stats_struct { |
0 | 112 int nmethod_count; |
113 int total_size; | |
114 int relocation_size; | |
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115 int consts_size; |
1748 | 116 int insts_size; |
0 | 117 int stub_size; |
118 int scopes_data_size; | |
119 int scopes_pcs_size; | |
120 int dependencies_size; | |
121 int handler_table_size; | |
122 int nul_chk_table_size; | |
123 int oops_size; | |
124 | |
125 void note_nmethod(nmethod* nm) { | |
126 nmethod_count += 1; | |
127 total_size += nm->size(); | |
128 relocation_size += nm->relocation_size(); | |
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129 consts_size += nm->consts_size(); |
1748 | 130 insts_size += nm->insts_size(); |
0 | 131 stub_size += nm->stub_size(); |
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132 oops_size += nm->oops_size(); |
0 | 133 scopes_data_size += nm->scopes_data_size(); |
134 scopes_pcs_size += nm->scopes_pcs_size(); | |
135 dependencies_size += nm->dependencies_size(); | |
136 handler_table_size += nm->handler_table_size(); | |
137 nul_chk_table_size += nm->nul_chk_table_size(); | |
138 } | |
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139 void print_nmethod_stats(const char* name) { |
0 | 140 if (nmethod_count == 0) return; |
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141 tty->print_cr("Statistics for %d bytecoded nmethods for %s:", nmethod_count, name); |
0 | 142 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); |
143 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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144 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 145 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 146 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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147 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 148 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
149 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
150 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
151 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
152 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
153 } | |
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154 }; |
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155 |
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156 struct native_nmethod_stats_struct { |
0 | 157 int native_nmethod_count; |
158 int native_total_size; | |
159 int native_relocation_size; | |
1748 | 160 int native_insts_size; |
0 | 161 int native_oops_size; |
162 void note_native_nmethod(nmethod* nm) { | |
163 native_nmethod_count += 1; | |
164 native_total_size += nm->size(); | |
165 native_relocation_size += nm->relocation_size(); | |
1748 | 166 native_insts_size += nm->insts_size(); |
0 | 167 native_oops_size += nm->oops_size(); |
168 } | |
169 void print_native_nmethod_stats() { | |
170 if (native_nmethod_count == 0) return; | |
171 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
172 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
173 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 174 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 175 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
176 } | |
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177 }; |
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178 |
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179 struct pc_nmethod_stats_struct { |
0 | 180 int pc_desc_resets; // number of resets (= number of caches) |
181 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
182 int pc_desc_approx; // number of those which have approximate true | |
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183 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 184 int pc_desc_hits; // number of LRU cache hits |
185 int pc_desc_tests; // total number of PcDesc examinations | |
186 int pc_desc_searches; // total number of quasi-binary search steps | |
187 int pc_desc_adds; // number of LUR cache insertions | |
188 | |
189 void print_pc_stats() { | |
190 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
191 pc_desc_queries, | |
192 (double)(pc_desc_tests + pc_desc_searches) | |
193 / pc_desc_queries); | |
194 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
195 pc_desc_resets, | |
196 pc_desc_queries, pc_desc_approx, | |
197 pc_desc_repeats, pc_desc_hits, | |
198 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
199 } | |
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200 }; |
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201 |
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202 #ifdef COMPILER1 |
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203 static java_nmethod_stats_struct c1_java_nmethod_stats; |
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204 #endif |
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205 #ifdef COMPILER2 |
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206 static java_nmethod_stats_struct c2_java_nmethod_stats; |
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207 #endif |
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208 #ifdef GRAAL |
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209 static java_nmethod_stats_struct graal_java_nmethod_stats; |
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210 #endif |
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211 static java_nmethod_stats_struct unknown_java_nmethod_stats; |
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212 |
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213 static native_nmethod_stats_struct native_nmethod_stats; |
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214 static pc_nmethod_stats_struct pc_nmethod_stats; |
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215 |
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216 static void note_java_nmethod(nmethod* nm) { |
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217 #ifdef COMPILER1 |
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218 if (nm->is_compiled_by_c1()) { |
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219 c1_java_nmethod_stats.note_nmethod(nm); |
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220 } else |
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221 #endif |
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222 #ifdef COMPILER2 |
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223 if (nm->is_compiled_by_c2()) { |
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224 c2_java_nmethod_stats.note_nmethod(nm); |
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225 } else |
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226 #endif |
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227 #ifdef GRAAL |
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228 if (nm->is_compiled_by_graal()) { |
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229 graal_java_nmethod_stats.note_nmethod(nm); |
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230 } else |
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231 #endif |
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232 { |
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233 unknown_java_nmethod_stats.note_nmethod(nm); |
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234 } |
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235 } |
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236 #endif |
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237 |
0 | 238 //--------------------------------------------------------------------------------- |
239 | |
240 | |
241 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
242 assert(pc != NULL, "Must be non null"); | |
243 assert(exception.not_null(), "Must be non null"); | |
244 assert(handler != NULL, "Must be non null"); | |
245 | |
246 _count = 0; | |
247 _exception_type = exception->klass(); | |
248 _next = NULL; | |
249 | |
250 add_address_and_handler(pc,handler); | |
251 } | |
252 | |
253 | |
254 address ExceptionCache::match(Handle exception, address pc) { | |
255 assert(pc != NULL,"Must be non null"); | |
256 assert(exception.not_null(),"Must be non null"); | |
257 if (exception->klass() == exception_type()) { | |
258 return (test_address(pc)); | |
259 } | |
260 | |
261 return NULL; | |
262 } | |
263 | |
264 | |
265 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
266 assert(exception.not_null(),"Must be non null"); | |
267 if (exception->klass() == exception_type() && count() < cache_size) { | |
268 return true; | |
269 } | |
270 return false; | |
271 } | |
272 | |
273 | |
274 address ExceptionCache::test_address(address addr) { | |
275 for (int i=0; i<count(); i++) { | |
276 if (pc_at(i) == addr) { | |
277 return handler_at(i); | |
278 } | |
279 } | |
280 return NULL; | |
281 } | |
282 | |
283 | |
284 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
285 if (test_address(addr) == handler) return true; | |
286 if (count() < cache_size) { | |
287 set_pc_at(count(),addr); | |
288 set_handler_at(count(), handler); | |
289 increment_count(); | |
290 return true; | |
291 } | |
292 return false; | |
293 } | |
294 | |
295 | |
296 // private method for handling exception cache | |
297 // These methods are private, and used to manipulate the exception cache | |
298 // directly. | |
299 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
300 ExceptionCache* ec = exception_cache(); | |
301 while (ec != NULL) { | |
302 if (ec->match_exception_with_space(exception)) { | |
303 return ec; | |
304 } | |
305 ec = ec->next(); | |
306 } | |
307 return NULL; | |
308 } | |
309 | |
310 | |
311 //----------------------------------------------------------------------------- | |
312 | |
313 | |
314 // Helper used by both find_pc_desc methods. | |
315 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
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316 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_tests); |
0 | 317 if (!approximate) |
318 return pc->pc_offset() == pc_offset; | |
319 else | |
320 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
321 } | |
322 | |
323 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
324 if (initial_pc_desc == NULL) { | |
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325 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 326 return; |
327 } | |
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328 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_resets); |
0 | 329 // reset the cache by filling it with benign (non-null) values |
330 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
331 for (int i = 0; i < cache_size; i++) | |
332 _pc_descs[i] = initial_pc_desc; | |
333 } | |
334 | |
335 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
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336 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_queries); |
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337 NOT_PRODUCT(if (approximate) ++pc_nmethod_stats.pc_desc_approx); |
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338 |
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339 // Note: one might think that caching the most recently |
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340 // read value separately would be a win, but one would be |
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341 // wrong. When many threads are updating it, the cache |
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342 // line it's in would bounce between caches, negating |
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343 // any benefit. |
0 | 344 |
345 // In order to prevent race conditions do not load cache elements | |
346 // repeatedly, but use a local copy: | |
347 PcDesc* res; | |
348 | |
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349 // Step one: Check the most recently added value. |
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350 res = _pc_descs[0]; |
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351 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 352 if (match_desc(res, pc_offset, approximate)) { |
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353 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_repeats); |
0 | 354 return res; |
355 } | |
356 | |
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357 // Step two: Check the rest of the LRU cache. |
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358 for (int i = 1; i < cache_size; ++i) { |
0 | 359 res = _pc_descs[i]; |
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360 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 361 if (match_desc(res, pc_offset, approximate)) { |
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362 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_hits); |
0 | 363 return res; |
364 } | |
365 } | |
366 | |
367 // Report failure. | |
368 return NULL; | |
369 } | |
370 | |
371 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
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372 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_adds); |
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373 // Update the LRU cache by shifting pc_desc forward. |
0 | 374 for (int i = 0; i < cache_size; i++) { |
375 PcDesc* next = _pc_descs[i]; | |
376 _pc_descs[i] = pc_desc; | |
377 pc_desc = next; | |
378 } | |
379 } | |
380 | |
381 // adjust pcs_size so that it is a multiple of both oopSize and | |
382 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
383 // of oopSize, then 2*sizeof(PcDesc) is) | |
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384 static int adjust_pcs_size(int pcs_size) { |
0 | 385 int nsize = round_to(pcs_size, oopSize); |
386 if ((nsize % sizeof(PcDesc)) != 0) { | |
387 nsize = pcs_size + sizeof(PcDesc); | |
388 } | |
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389 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 390 return nsize; |
391 } | |
392 | |
393 //----------------------------------------------------------------------------- | |
394 | |
395 | |
396 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
397 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
398 assert(new_entry != NULL,"Must be non null"); | |
399 assert(new_entry->next() == NULL, "Must be null"); | |
400 | |
401 if (exception_cache() != NULL) { | |
402 new_entry->set_next(exception_cache()); | |
403 } | |
404 set_exception_cache(new_entry); | |
405 } | |
406 | |
407 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
408 ExceptionCache* prev = NULL; | |
409 ExceptionCache* curr = exception_cache(); | |
410 assert(curr != NULL, "nothing to remove"); | |
411 // find the previous and next entry of ec | |
412 while (curr != ec) { | |
413 prev = curr; | |
414 curr = curr->next(); | |
415 assert(curr != NULL, "ExceptionCache not found"); | |
416 } | |
417 // now: curr == ec | |
418 ExceptionCache* next = curr->next(); | |
419 if (prev == NULL) { | |
420 set_exception_cache(next); | |
421 } else { | |
422 prev->set_next(next); | |
423 } | |
424 delete curr; | |
425 } | |
426 | |
427 | |
428 // public method for accessing the exception cache | |
429 // These are the public access methods. | |
430 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
431 // We never grab a lock to read the exception cache, so we may | |
432 // have false negatives. This is okay, as it can only happen during | |
433 // the first few exception lookups for a given nmethod. | |
434 ExceptionCache* ec = exception_cache(); | |
435 while (ec != NULL) { | |
436 address ret_val; | |
437 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
438 return ret_val; | |
439 } | |
440 ec = ec->next(); | |
441 } | |
442 return NULL; | |
443 } | |
444 | |
445 | |
446 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
447 // There are potential race conditions during exception cache updates, so we | |
448 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 449 // we don't lock during reads, it is possible to have several threads attempt |
0 | 450 // to update the cache with the same data. We need to check for already inserted |
451 // copies of the current data before adding it. | |
452 | |
453 MutexLocker ml(ExceptionCache_lock); | |
454 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
455 | |
456 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
457 target_entry = new ExceptionCache(exception,pc,handler); | |
458 add_exception_cache_entry(target_entry); | |
459 } | |
460 } | |
461 | |
462 | |
463 //-------------end of code for ExceptionCache-------------- | |
464 | |
465 | |
466 int nmethod::total_size() const { | |
467 return | |
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468 consts_size() + |
1748 | 469 insts_size() + |
0 | 470 stub_size() + |
471 scopes_data_size() + | |
472 scopes_pcs_size() + | |
473 handler_table_size() + | |
474 nul_chk_table_size(); | |
475 } | |
476 | |
477 const char* nmethod::compile_kind() const { | |
478 if (is_osr_method()) return "osr"; | |
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479 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 480 return NULL; |
481 } | |
482 | |
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483 // Fill in default values for various flag fields |
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484 void nmethod::init_defaults() { |
13441 | 485 _state = in_use; |
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486 _marked_for_reclamation = 0; |
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487 _has_flushed_dependencies = 0; |
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488 _has_unsafe_access = 0; |
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489 _has_method_handle_invokes = 0; |
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490 _lazy_critical_native = 0; |
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491 _has_wide_vectors = 0; |
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492 _marked_for_deoptimization = 0; |
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493 _lock_count = 0; |
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494 _stack_traversal_mark = 0; |
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495 _unload_reported = false; // jvmti state |
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496 |
1726 | 497 #ifdef ASSERT |
498 _oops_are_stale = false; | |
499 #endif | |
500 | |
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501 _oops_do_mark_link = NULL; |
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502 _jmethod_id = NULL; |
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503 _osr_link = NULL; |
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504 _scavenge_root_link = NULL; |
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505 _scavenge_root_state = 0; |
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506 _compiler = NULL; |
9707 | 507 #ifdef GRAAL |
508 _graal_installed_code = NULL; | |
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509 _speculation_log = NULL; |
9707 | 510 #endif |
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511 #ifdef HAVE_DTRACE_H |
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512 _trap_offset = 0; |
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513 #endif // def HAVE_DTRACE_H |
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514 } |
0 | 515 |
516 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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517 int compile_id, |
0 | 518 CodeBuffer *code_buffer, |
519 int vep_offset, | |
520 int frame_complete, | |
521 int frame_size, | |
522 ByteSize basic_lock_owner_sp_offset, | |
523 ByteSize basic_lock_sp_offset, | |
524 OopMapSet* oop_maps) { | |
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525 code_buffer->finalize_oop_references(method); |
0 | 526 // create nmethod |
527 nmethod* nm = NULL; | |
528 { | |
529 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
530 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
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531 CodeOffsets offsets; |
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532 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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533 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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534 nm = new (native_nmethod_size) nmethod(method(), native_nmethod_size, |
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535 compile_id, &offsets, |
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536 code_buffer, frame_size, |
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537 basic_lock_owner_sp_offset, |
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538 basic_lock_sp_offset, oop_maps); |
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539 NOT_PRODUCT(if (nm != NULL) note_java_nmethod(nm)); |
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540 if (PrintAssembly && nm != NULL) { |
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541 Disassembler::decode(nm); |
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542 } |
0 | 543 } |
544 // verify nmethod | |
545 debug_only(if (nm) nm->verify();) // might block | |
546 | |
547 if (nm != NULL) { | |
548 nm->log_new_nmethod(); | |
549 } | |
550 | |
551 return nm; | |
552 } | |
553 | |
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554 #ifdef HAVE_DTRACE_H |
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555 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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556 CodeBuffer *code_buffer, |
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557 int vep_offset, |
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558 int trap_offset, |
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559 int frame_complete, |
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560 int frame_size) { |
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561 code_buffer->finalize_oop_references(method); |
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562 // create nmethod |
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563 nmethod* nm = NULL; |
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564 { |
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565 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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566 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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567 CodeOffsets offsets; |
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568 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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569 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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570 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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571 |
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572 nm = new (nmethod_size) nmethod(method(), nmethod_size, |
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573 &offsets, code_buffer, frame_size); |
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574 |
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575 NOT_PRODUCT(if (nm != NULL) note_java_nmethod(nm)); |
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576 if (PrintAssembly && nm != NULL) { |
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577 Disassembler::decode(nm); |
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578 } |
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579 } |
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580 // verify nmethod |
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581 debug_only(if (nm) nm->verify();) // might block |
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582 |
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583 if (nm != NULL) { |
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584 nm->log_new_nmethod(); |
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585 } |
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586 |
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587 return nm; |
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588 } |
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589 |
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590 #endif // def HAVE_DTRACE_H |
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591 |
0 | 592 nmethod* nmethod::new_nmethod(methodHandle method, |
593 int compile_id, | |
594 int entry_bci, | |
595 CodeOffsets* offsets, | |
596 int orig_pc_offset, | |
597 DebugInformationRecorder* debug_info, | |
598 Dependencies* dependencies, | |
599 CodeBuffer* code_buffer, int frame_size, | |
600 OopMapSet* oop_maps, | |
601 ExceptionHandlerTable* handler_table, | |
602 ImplicitExceptionTable* nul_chk_table, | |
603 AbstractCompiler* compiler, | |
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604 int comp_level |
9707 | 605 #ifdef GRAAL |
606 , Handle installed_code, | |
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607 Handle speculationLog |
9707 | 608 #endif |
0 | 609 ) |
610 { | |
611 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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612 code_buffer->finalize_oop_references(method); |
0 | 613 // create nmethod |
614 nmethod* nm = NULL; | |
615 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
616 int nmethod_size = | |
617 allocation_size(code_buffer, sizeof(nmethod)) | |
618 + adjust_pcs_size(debug_info->pcs_size()) | |
619 + round_to(dependencies->size_in_bytes() , oopSize) | |
620 + round_to(handler_table->size_in_bytes(), oopSize) | |
621 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
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622 + round_to(debug_info->data_size() , oopSize); |
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623 nm = new (nmethod_size) |
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624 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
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625 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
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626 oop_maps, |
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627 handler_table, |
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628 nul_chk_table, |
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629 compiler, |
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630 comp_level |
9707 | 631 #ifdef GRAAL |
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632 , installed_code, |
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633 speculationLog |
9707 | 634 #endif |
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635 ); |
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636 |
0 | 637 if (nm != NULL) { |
638 // To make dependency checking during class loading fast, record | |
639 // the nmethod dependencies in the classes it is dependent on. | |
640 // This allows the dependency checking code to simply walk the | |
641 // class hierarchy above the loaded class, checking only nmethods | |
642 // which are dependent on those classes. The slow way is to | |
643 // check every nmethod for dependencies which makes it linear in | |
644 // the number of methods compiled. For applications with a lot | |
645 // classes the slow way is too slow. | |
646 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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647 Klass* klass = deps.context_type(); |
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648 if (klass == NULL) { |
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649 continue; // ignore things like evol_method |
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650 } |
0 | 651 |
652 // record this nmethod as dependent on this klass | |
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653 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 654 } |
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655 NOT_PRODUCT(if (nm != NULL) note_java_nmethod(nm)); |
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656 if (PrintAssembly || CompilerOracle::has_option_string(method, "PrintAssembly")) { |
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657 Disassembler::decode(nm); |
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658 } |
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659 } |
0 | 660 } |
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661 // Do verification and logging outside CodeCache_lock. |
0 | 662 if (nm != NULL) { |
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663 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet. |
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664 DEBUG_ONLY(nm->verify();) |
0 | 665 nm->log_new_nmethod(); |
666 } | |
667 return nm; | |
668 } | |
669 | |
670 | |
671 // For native wrappers | |
672 nmethod::nmethod( | |
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673 Method* method, |
0 | 674 int nmethod_size, |
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675 int compile_id, |
0 | 676 CodeOffsets* offsets, |
677 CodeBuffer* code_buffer, | |
678 int frame_size, | |
679 ByteSize basic_lock_owner_sp_offset, | |
680 ByteSize basic_lock_sp_offset, | |
681 OopMapSet* oop_maps ) | |
682 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
683 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 684 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
685 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 686 { |
687 { | |
688 debug_only(No_Safepoint_Verifier nsv;) | |
689 assert_locked_or_safepoint(CodeCache_lock); | |
690 | |
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691 init_defaults(); |
0 | 692 _method = method; |
693 _entry_bci = InvocationEntryBci; | |
694 // We have no exception handler or deopt handler make the | |
695 // values something that will never match a pc like the nmethod vtable entry | |
696 _exception_offset = 0; | |
697 _deoptimize_offset = 0; | |
1204 | 698 _deoptimize_mh_offset = 0; |
0 | 699 _orig_pc_offset = 0; |
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700 |
1748 | 701 _consts_offset = data_offset(); |
0 | 702 _stub_offset = data_offset(); |
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703 _oops_offset = data_offset(); |
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704 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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705 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 706 _scopes_pcs_offset = _scopes_data_offset; |
707 _dependencies_offset = _scopes_pcs_offset; | |
708 _handler_table_offset = _dependencies_offset; | |
709 _nul_chk_table_offset = _handler_table_offset; | |
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710 _nmethod_end_offset = _nul_chk_table_offset; |
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711 _compile_id = compile_id; |
0 | 712 _comp_level = CompLevel_none; |
1748 | 713 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
714 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 715 _osr_entry_point = NULL; |
716 _exception_cache = NULL; | |
717 _pc_desc_cache.reset_to(NULL); | |
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718 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
0 | 719 |
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720 code_buffer->copy_values_to(this); |
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721 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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722 CodeCache::add_scavenge_root_nmethod(this); |
12080 | 723 Universe::heap()->register_nmethod(this); |
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724 } |
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725 debug_only(verify_scavenge_root_oops()); |
0 | 726 CodeCache::commit(this); |
727 } | |
728 | |
729 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
730 ttyLocker ttyl; // keep the following output all in one block | |
731 // This output goes directly to the tty, not the compiler log. | |
732 // To enable tools to match it up with the compilation activity, | |
733 // be sure to tag this tty output with the compile ID. | |
734 if (xtty != NULL) { | |
735 xtty->begin_head("print_native_nmethod"); | |
736 xtty->method(_method); | |
737 xtty->stamp(); | |
738 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
739 } | |
740 // print the header part first | |
741 print(); | |
742 // then print the requested information | |
743 if (PrintNativeNMethods) { | |
744 print_code(); | |
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745 if (oop_maps != NULL) { |
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746 oop_maps->print(); |
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747 } |
0 | 748 } |
749 if (PrintRelocations) { | |
750 print_relocations(); | |
751 } | |
752 if (xtty != NULL) { | |
753 xtty->tail("print_native_nmethod"); | |
754 } | |
755 } | |
756 } | |
757 | |
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758 // For dtrace wrappers |
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759 #ifdef HAVE_DTRACE_H |
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760 nmethod::nmethod( |
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761 Method* method, |
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762 int nmethod_size, |
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763 CodeOffsets* offsets, |
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764 CodeBuffer* code_buffer, |
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765 int frame_size) |
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766 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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767 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 768 _native_receiver_sp_offset(in_ByteSize(-1)), |
769 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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770 { |
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771 { |
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772 debug_only(No_Safepoint_Verifier nsv;) |
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773 assert_locked_or_safepoint(CodeCache_lock); |
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774 |
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775 init_defaults(); |
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776 _method = method; |
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777 _entry_bci = InvocationEntryBci; |
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778 // We have no exception handler or deopt handler make the |
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779 // values something that will never match a pc like the nmethod vtable entry |
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780 _exception_offset = 0; |
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781 _deoptimize_offset = 0; |
1204 | 782 _deoptimize_mh_offset = 0; |
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783 _unwind_handler_offset = -1; |
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784 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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785 _orig_pc_offset = 0; |
1748 | 786 _consts_offset = data_offset(); |
116
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787 _stub_offset = data_offset(); |
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788 _oops_offset = data_offset(); |
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789 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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790 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
116
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791 _scopes_pcs_offset = _scopes_data_offset; |
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792 _dependencies_offset = _scopes_pcs_offset; |
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793 _handler_table_offset = _dependencies_offset; |
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794 _nul_chk_table_offset = _handler_table_offset; |
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795 _nmethod_end_offset = _nul_chk_table_offset; |
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796 _compile_id = 0; // default |
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797 _comp_level = CompLevel_none; |
1748 | 798 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
799 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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800 _osr_entry_point = NULL; |
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801 _exception_cache = NULL; |
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802 _pc_desc_cache.reset_to(NULL); |
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803 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
116
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804 |
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805 code_buffer->copy_values_to(this); |
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806 debug_only(verify_scavenge_root_oops()); |
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807 CodeCache::commit(this); |
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808 } |
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809 |
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810 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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811 ttyLocker ttyl; // keep the following output all in one block |
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812 // This output goes directly to the tty, not the compiler log. |
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813 // To enable tools to match it up with the compilation activity, |
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814 // be sure to tag this tty output with the compile ID. |
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815 if (xtty != NULL) { |
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816 xtty->begin_head("print_dtrace_nmethod"); |
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817 xtty->method(_method); |
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818 xtty->stamp(); |
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819 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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820 } |
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821 // print the header part first |
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822 print(); |
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823 // then print the requested information |
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824 if (PrintNMethods) { |
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825 print_code(); |
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826 } |
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827 if (PrintRelocations) { |
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828 print_relocations(); |
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829 } |
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830 if (xtty != NULL) { |
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831 xtty->tail("print_dtrace_nmethod"); |
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832 } |
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833 } |
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834 } |
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835 #endif // def HAVE_DTRACE_H |
0 | 836 |
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837 void* nmethod::operator new(size_t size, int nmethod_size) throw() { |
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838 // Not critical, may return null if there is too little continuous memory |
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839 return CodeCache::allocate(nmethod_size); |
0 | 840 } |
841 | |
842 nmethod::nmethod( | |
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843 Method* method, |
0 | 844 int nmethod_size, |
845 int compile_id, | |
846 int entry_bci, | |
847 CodeOffsets* offsets, | |
848 int orig_pc_offset, | |
849 DebugInformationRecorder* debug_info, | |
850 Dependencies* dependencies, | |
851 CodeBuffer *code_buffer, | |
852 int frame_size, | |
853 OopMapSet* oop_maps, | |
854 ExceptionHandlerTable* handler_table, | |
855 ImplicitExceptionTable* nul_chk_table, | |
856 AbstractCompiler* compiler, | |
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857 int comp_level |
9707 | 858 #ifdef GRAAL |
859 , Handle installed_code, | |
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860 Handle speculation_log |
9707 | 861 #endif |
0 | 862 ) |
863 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
864 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 865 _native_receiver_sp_offset(in_ByteSize(-1)), |
866 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 867 { |
868 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
869 { | |
870 debug_only(No_Safepoint_Verifier nsv;) | |
871 assert_locked_or_safepoint(CodeCache_lock); | |
872 | |
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873 init_defaults(); |
0 | 874 _method = method; |
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875 _entry_bci = entry_bci; |
0 | 876 _compile_id = compile_id; |
877 _comp_level = comp_level; | |
878 _compiler = compiler; | |
879 _orig_pc_offset = orig_pc_offset; | |
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880 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
1748 | 881 |
882 // Section offsets | |
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883 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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884 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 885 |
9707 | 886 #ifdef GRAAL |
887 _graal_installed_code = installed_code(); | |
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888 _speculation_log = (instanceOop)speculation_log(); |
9707 | 889 #endif |
890 if (compiler->is_graal()) { | |
891 // Graal might not produce any stub sections | |
892 if (offsets->value(CodeOffsets::Exceptions) != -1) { | |
893 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions); | |
894 } else { | |
895 _exception_offset = -1; | |
896 } | |
897 if (offsets->value(CodeOffsets::Deopt) != -1) { | |
898 _deoptimize_offset = code_offset() + offsets->value(CodeOffsets::Deopt); | |
899 } else { | |
900 _deoptimize_offset = -1; | |
901 } | |
902 if (offsets->value(CodeOffsets::DeoptMH) != -1) { | |
903 _deoptimize_mh_offset = code_offset() + offsets->value(CodeOffsets::DeoptMH); | |
904 } else { | |
905 _deoptimize_mh_offset = -1; | |
906 } | |
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907 } else { |
9707 | 908 // Exception handler and deopt handler are in the stub section |
909 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); | |
910 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); | |
911 | |
912 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
913 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
914 if (offsets->value(CodeOffsets::DeoptMH) != -1) { | |
915 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); | |
916 } else { | |
917 _deoptimize_mh_offset = -1; | |
918 } | |
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919 } |
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920 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 921 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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922 } else { |
1748 | 923 _unwind_handler_offset = -1; |
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924 } |
1748 | 925 |
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926 _oops_offset = data_offset(); |
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927 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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928 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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929 |
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930 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 931 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
932 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
933 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
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934 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); |
0 | 935 |
1748 | 936 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
937 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
938 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 939 _exception_cache = NULL; |
940 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
941 | |
942 // Copy contents of ScopeDescRecorder to nmethod | |
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943 code_buffer->copy_values_to(this); |
0 | 944 debug_info->copy_to(this); |
945 dependencies->copy_to(this); | |
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946 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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947 CodeCache::add_scavenge_root_nmethod(this); |
12080 | 948 Universe::heap()->register_nmethod(this); |
989
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949 } |
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950 debug_only(verify_scavenge_root_oops()); |
0 | 951 |
952 CodeCache::commit(this); | |
953 | |
954 // Copy contents of ExceptionHandlerTable to nmethod | |
955 handler_table->copy_to(this); | |
956 nul_chk_table->copy_to(this); | |
957 | |
958 // we use the information of entry points to find out if a method is | |
959 // static or non static | |
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960 assert(compiler->is_c2() || compiler->is_graal() || |
0 | 961 _method->is_static() == (entry_point() == _verified_entry_point), |
962 " entry points must be same for static methods and vice versa"); | |
963 } | |
964 | |
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965 bool printnmethods = PrintNMethods |
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966 || CompilerOracle::should_print(_method) |
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967 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 968 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
969 print_nmethod(printnmethods); | |
970 } | |
971 } | |
972 | |
973 | |
974 // Print a short set of xml attributes to identify this nmethod. The | |
975 // output should be embedded in some other element. | |
976 void nmethod::log_identity(xmlStream* log) const { | |
977 log->print(" compile_id='%d'", compile_id()); | |
978 const char* nm_kind = compile_kind(); | |
979 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
980 if (compiler() != NULL) { | |
981 log->print(" compiler='%s'", compiler()->name()); | |
982 } | |
1783 | 983 if (TieredCompilation) { |
984 log->print(" level='%d'", comp_level()); | |
985 } | |
0 | 986 } |
987 | |
988 | |
989 #define LOG_OFFSET(log, name) \ | |
990 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
991 log->print(" " XSTR(name) "_offset='%d'" , \ | |
992 (intptr_t)name##_begin() - (intptr_t)this) | |
993 | |
994 | |
995 void nmethod::log_new_nmethod() const { | |
996 if (LogCompilation && xtty != NULL) { | |
997 ttyLocker ttyl; | |
998 HandleMark hm; | |
999 xtty->begin_elem("nmethod"); | |
1000 log_identity(xtty); | |
1748 | 1001 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 1002 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
1003 | |
1004 LOG_OFFSET(xtty, relocation); | |
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1005 LOG_OFFSET(xtty, consts); |
1748 | 1006 LOG_OFFSET(xtty, insts); |
0 | 1007 LOG_OFFSET(xtty, stub); |
1008 LOG_OFFSET(xtty, scopes_data); | |
1009 LOG_OFFSET(xtty, scopes_pcs); | |
1010 LOG_OFFSET(xtty, dependencies); | |
1011 LOG_OFFSET(xtty, handler_table); | |
1012 LOG_OFFSET(xtty, nul_chk_table); | |
1013 LOG_OFFSET(xtty, oops); | |
1014 | |
1015 xtty->method(method()); | |
1016 xtty->stamp(); | |
1017 xtty->end_elem(); | |
1018 } | |
1019 } | |
1020 | |
1021 #undef LOG_OFFSET | |
1022 | |
1023 | |
1024 // Print out more verbose output usually for a newly created nmethod. | |
2405
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1025 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 1026 if (st != NULL) { |
1027 ttyLocker ttyl; | |
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1028 if (CIPrintCompilerName) st->print("%s:", compiler()->name()); |
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1029 if (WizardMode) { |
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1030 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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1031 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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1032 } else { |
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1033 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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1034 } |
0 | 1035 } |
1036 } | |
1037 | |
1038 | |
1039 void nmethod::print_nmethod(bool printmethod) { | |
1040 ttyLocker ttyl; // keep the following output all in one block | |
1041 if (xtty != NULL) { | |
1042 xtty->begin_head("print_nmethod"); | |
1043 xtty->stamp(); | |
1044 xtty->end_head(); | |
1045 } | |
1046 // print the header part first | |
1047 print(); | |
1048 // then print the requested information | |
1049 if (printmethod) { | |
1050 print_code(); | |
1051 print_pcs(); | |
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1052 if (oop_maps()) { |
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1053 oop_maps()->print(); |
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1054 } |
0 | 1055 } |
1056 if (PrintDebugInfo) { | |
1057 print_scopes(); | |
1058 } | |
1059 if (PrintRelocations) { | |
1060 print_relocations(); | |
1061 } | |
1062 if (PrintDependencies) { | |
1063 print_dependencies(); | |
1064 } | |
1065 if (PrintExceptionHandlers) { | |
1066 print_handler_table(); | |
1067 print_nul_chk_table(); | |
1068 } | |
1069 if (xtty != NULL) { | |
1070 xtty->tail("print_nmethod"); | |
1071 } | |
1072 } | |
1073 | |
1074 | |
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1075 // Promote one word from an assembly-time handle to a live embedded oop. |
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1076 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1077 if (handle == NULL || |
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1078 // As a special case, IC oops are initialized to 1 or -1. |
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1079 handle == (jobject) Universe::non_oop_word()) { |
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1080 (*dest) = (oop) handle; |
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1081 } else { |
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1082 (*dest) = JNIHandles::resolve_non_null(handle); |
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1083 } |
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1084 } |
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1085 |
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1086 |
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1087 // Have to have the same name because it's called by a template |
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1088 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1089 int length = array->length(); |
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1090 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1091 oop* dest = oops_begin(); |
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1092 for (int index = 0 ; index < length; index++) { |
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1093 initialize_immediate_oop(&dest[index], array->at(index)); |
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1094 } |
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1095 |
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1096 // Now we can fix up all the oops in the code. We need to do this |
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1097 // in the code because the assembler uses jobjects as placeholders. |
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1098 // The code and relocations have already been initialized by the |
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1099 // CodeBlob constructor, so it is valid even at this early point to |
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1100 // iterate over relocations and patch the code. |
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1101 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1102 } |
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1103 |
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1104 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1105 int length = array->length(); |
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1106 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1107 Metadata** dest = metadata_begin(); |
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1108 for (int index = 0 ; index < length; index++) { |
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1109 dest[index] = array->at(index); |
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1110 } |
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1111 } |
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1112 |
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1113 bool nmethod::is_at_poll_return(address pc) { |
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1114 RelocIterator iter(this, pc, pc+1); |
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1115 while (iter.next()) { |
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1116 if (iter.type() == relocInfo::poll_return_type) |
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1117 return true; |
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1118 } |
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1119 return false; |
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1120 } |
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1121 |
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1122 |
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1123 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1124 RelocIterator iter(this, pc, pc+1); |
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1125 while (iter.next()) { |
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1126 relocInfo::relocType t = iter.type(); |
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1127 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1128 return true; |
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1129 } |
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1130 return false; |
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1131 } |
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1132 |
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1133 |
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1134 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1135 // re-patch all oop-bearing instructions, just in case some oops moved |
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1136 RelocIterator iter(this, begin, end); |
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1137 while (iter.next()) { |
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1138 if (iter.type() == relocInfo::oop_type) { |
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1139 oop_Relocation* reloc = iter.oop_reloc(); |
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1140 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1141 oop* dest = reloc->oop_addr(); |
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1142 initialize_immediate_oop(dest, (jobject) *dest); |
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1143 } |
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1144 // Refresh the oop-related bits of this instruction. |
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1145 reloc->fix_oop_relocation(); |
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1146 } else if (iter.type() == relocInfo::metadata_type) { |
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1147 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1148 reloc->fix_metadata_relocation(); |
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1149 } |
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1150 } |
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1151 } |
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1152 |
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1153 |
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1154 void nmethod::verify_oop_relocations() { |
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1155 // Ensure sure that the code matches the current oop values |
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1156 RelocIterator iter(this, NULL, NULL); |
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1157 while (iter.next()) { |
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1158 if (iter.type() == relocInfo::oop_type) { |
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1159 oop_Relocation* reloc = iter.oop_reloc(); |
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1160 if (!reloc->oop_is_immediate()) { |
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1161 reloc->verify_oop_relocation(); |
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1162 } |
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1163 } |
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1164 } |
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1165 } |
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1166 |
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1167 |
0 | 1168 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1169 PcDesc* pd = pc_desc_at(pc); | |
1170 guarantee(pd != NULL, "scope must be present"); | |
1171 return new ScopeDesc(this, pd->scope_decode_offset(), | |
9707 | 1172 pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(), |
1253
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1173 pd->return_oop()); |
0 | 1174 } |
1175 | |
1176 | |
1177 void nmethod::clear_inline_caches() { | |
1178 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1179 if (is_zombie()) { | |
1180 return; | |
1181 } | |
1182 | |
1183 RelocIterator iter(this); | |
1184 while (iter.next()) { | |
1185 iter.reloc()->clear_inline_cache(); | |
1186 } | |
1187 } | |
1188 | |
1189 | |
1190 void nmethod::cleanup_inline_caches() { | |
1191 | |
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1192 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1193 |
1194 // If the method is not entrant or zombie then a JMP is plastered over the | |
1195 // first few bytes. If an oop in the old code was there, that oop | |
1196 // should not get GC'd. Skip the first few bytes of oops on | |
1197 // not-entrant methods. | |
1198 address low_boundary = verified_entry_point(); | |
1199 if (!is_in_use()) { | |
1200 low_boundary += NativeJump::instruction_size; | |
1201 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1202 // This means that the low_boundary is going to be a little too high. | |
1203 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1204 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1205 } | |
1206 | |
1207 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1208 ResourceMark rm; | |
1209 RelocIterator iter(this, low_boundary); | |
1210 while(iter.next()) { | |
1211 switch(iter.type()) { | |
1212 case relocInfo::virtual_call_type: | |
1213 case relocInfo::opt_virtual_call_type: { | |
1214 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1215 // Ok, to lookup references to zombies here | |
1216 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1217 if( cb != NULL && cb->is_nmethod() ) { | |
1218 nmethod* nm = (nmethod*)cb; | |
1219 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1220 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1221 } |
1222 break; | |
1223 } | |
1224 case relocInfo::static_call_type: { | |
1225 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1226 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1227 if( cb != NULL && cb->is_nmethod() ) { | |
1228 nmethod* nm = (nmethod*)cb; | |
1229 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1230 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1231 } |
1232 break; | |
1233 } | |
1234 } | |
1235 } | |
1236 } | |
1237 | |
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1238 // This is a private interface with the sweeper. |
0 | 1239 void nmethod::mark_as_seen_on_stack() { |
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1240 assert(is_alive(), "Must be an alive method"); |
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1241 // Set the traversal mark to ensure that the sweeper does 2 |
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1242 // cleaning passes before moving to zombie. |
0 | 1243 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1244 } | |
1245 | |
2342
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1246 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1247 // there are no activations on the stack, not in use by the VM, |
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1248 // and not in use by the ServiceThread) |
0 | 1249 bool nmethod::can_not_entrant_be_converted() { |
1250 assert(is_not_entrant(), "must be a non-entrant method"); | |
1251 | |
1252 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1253 // count can be greater than the stack traversal count before it hits the | |
1254 // nmethod for the second time. | |
2342
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1255 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1256 !is_locked_by_vm(); |
0 | 1257 } |
1258 | |
1259 void nmethod::inc_decompile_count() { | |
9707 | 1260 if (!is_compiled_by_c2() && !is_compiled_by_graal()) return; |
0 | 1261 // Could be gated by ProfileTraps, but do not bother... |
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1262 Method* m = method(); |
0 | 1263 if (m == NULL) return; |
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1264 MethodData* mdo = m->method_data(); |
0 | 1265 if (mdo == NULL) return; |
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1266 // There is a benign race here. See comments in methodData.hpp. |
0 | 1267 mdo->inc_decompile_count(); |
1268 } | |
1269 | |
1270 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1271 | |
1272 post_compiled_method_unload(); | |
1273 | |
1274 // Since this nmethod is being unloaded, make sure that dependencies | |
1275 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1276 // indicate that this work is being done during a GC. | |
1277 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1278 assert(is_alive != NULL, "Should be non-NULL"); | |
1279 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1280 flush_dependencies(is_alive); | |
1281 | |
1282 // Break cycle between nmethod & method | |
1283 if (TraceClassUnloading && WizardMode) { | |
1284 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
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1285 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1286 "), cause(" INTPTR_FORMAT ")", |
1287 this, (address)_method, (address)cause); | |
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1288 if (!Universe::heap()->is_gc_active()) |
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1289 cause->klass()->print(); |
0 | 1290 } |
941 | 1291 // Unlink the osr method, so we do not look this up again |
1292 if (is_osr_method()) { | |
1293 invalidate_osr_method(); | |
1294 } | |
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1295 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1296 // so we don't have to break the cycle. Note that it is possible to |
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1297 // have the Method* live here, in case we unload the nmethod because |
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1298 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1299 if (_method != NULL) { |
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1300 // OSR methods point to the Method*, but the Method* does not |
0 | 1301 // point back! |
1302 if (_method->code() == this) { | |
1303 _method->clear_code(); // Break a cycle | |
1304 } | |
1305 _method = NULL; // Clear the method of this dead nmethod | |
1306 } | |
9707 | 1307 |
1308 #ifdef GRAAL | |
1309 // The method can only be unloaded after the pointer to the installed code | |
1310 // Java wrapper is no longer alive. Here we need to clear out this weak | |
1311 // reference to the dead object. | |
1312 if (_graal_installed_code != NULL) { | |
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1313 HotSpotInstalledCode::set_codeBlob(_graal_installed_code, 0); |
9707 | 1314 _graal_installed_code = NULL; |
1315 } | |
1316 #endif | |
1317 | |
0 | 1318 // Make the class unloaded - i.e., change state and notify sweeper |
1538
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1319 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1320 if (is_in_use()) { |
1321 // Transitioning directly from live to unloaded -- so | |
1322 // we need to force a cache clean-up; remember this | |
1323 // for later on. | |
1324 CodeCache::set_needs_cache_clean(true); | |
1325 } | |
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1326 _state = unloaded; |
0 | 1327 |
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1328 // Log the unloading. |
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1329 log_state_change(); |
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1330 |
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1331 // The Method* is gone at this point |
0 | 1332 assert(_method == NULL, "Tautology"); |
1333 | |
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1334 set_osr_link(NULL); |
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1335 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
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1336 NMethodSweeper::report_state_change(this); |
0 | 1337 } |
1338 | |
1339 void nmethod::invalidate_osr_method() { | |
1340 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1341 // Remove from list of active nmethods | |
1342 if (method() != NULL) | |
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1343 method()->method_holder()->remove_osr_nmethod(this); |
0 | 1344 // Set entry as invalid |
1345 _entry_bci = InvalidOSREntryBci; | |
1346 } | |
1347 | |
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1348 void nmethod::log_state_change() const { |
0 | 1349 if (LogCompilation) { |
1350 if (xtty != NULL) { | |
1351 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1352 if (_state == unloaded) { |
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1353 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1354 os::current_thread_id()); |
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1355 } else { |
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1356 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1357 os::current_thread_id(), |
1644
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1358 (_state == zombie ? " zombie='1'" : "")); |
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1359 } |
0 | 1360 log_identity(xtty); |
1361 xtty->stamp(); | |
1362 xtty->end_elem(); | |
1363 } | |
1364 } | |
1644
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1365 if (PrintCompilation && _state != unloaded) { |
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1366 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1367 } |
1368 } | |
1369 | |
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1370 /** |
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1371 * Common functionality for both make_not_entrant and make_zombie |
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1372 */ |
1141 | 1373 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1374 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1375 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1376 |
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1377 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1378 nmethodLocker nml(this); |
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1379 methodHandle the_method(method()); |
1726 | 1380 No_Safepoint_Verifier nsv; |
0 | 1381 |
12080 | 1382 // during patching, depending on the nmethod state we must notify the GC that |
1383 // code has been unloaded, unregistering it. We cannot do this right while | |
1384 // holding the Patching_lock because we need to use the CodeCache_lock. This | |
1385 // would be prone to deadlocks. | |
1386 // This flag is used to remember whether we need to later lock and unregister. | |
1387 bool nmethod_needs_unregister = false; | |
1388 | |
0 | 1389 { |
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1390 // invalidate osr nmethod before acquiring the patching lock since |
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1391 // they both acquire leaf locks and we don't want a deadlock. |
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1392 // This logic is equivalent to the logic below for patching the |
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1393 // verified entry point of regular methods. |
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1394 if (is_osr_method()) { |
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1395 // this effectively makes the osr nmethod not entrant |
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1396 invalidate_osr_method(); |
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1397 } |
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1398 |
0 | 1399 // Enter critical section. Does not block for safepoint. |
1400 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1401 |
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1402 if (_state == state) { |
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1403 // another thread already performed this transition so nothing |
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1404 // to do, but return false to indicate this. |
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1405 return false; |
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1406 } |
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1407 |
0 | 1408 // The caller can be calling the method statically or through an inline |
1409 // cache call. | |
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1410 if (!is_osr_method() && !is_not_entrant()) { |
9707 | 1411 address stub = SharedRuntime::get_handle_wrong_method_stub(); |
1412 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), stub); | |
0 | 1413 } |
1414 | |
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1415 if (is_in_use()) { |
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1416 // It's a true state change, so mark the method as decompiled. |
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1417 // Do it only for transition from alive. |
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1418 inc_decompile_count(); |
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1419 } |
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1420 |
12080 | 1421 // If the state is becoming a zombie, signal to unregister the nmethod with |
1422 // the heap. | |
1423 // This nmethod may have already been unloaded during a full GC. | |
1424 if ((state == zombie) && !is_unloaded()) { | |
1425 nmethod_needs_unregister = true; | |
1426 } | |
1427 | |
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1428 // Must happen before state change. Otherwise we have a race condition in |
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1429 // nmethod::can_not_entrant_be_converted(). I.e., a method can immediately |
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1430 // transition its state from 'not_entrant' to 'zombie' without having to wait |
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1431 // for stack scanning. |
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1432 if (state == not_entrant) { |
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1433 mark_as_seen_on_stack(); |
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1434 OrderAccess::storestore(); |
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1435 } |
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1436 |
0 | 1437 // Change state |
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1438 _state = state; |
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1439 |
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1440 // Log the transition once |
032260830071
5057818: codecache full and compiler disabled in bigapps fastdebug run
never
parents:
994
diff
changeset
|
1441 log_state_change(); |
032260830071
5057818: codecache full and compiler disabled in bigapps fastdebug run
never
parents:
994
diff
changeset
|
1442 |
1644
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1443 // Remove nmethod from method. |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1444 // We need to check if both the _code and _from_compiled_code_entry_point |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1445 // refer to this nmethod because there is a race in setting these two fields |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1446 // in Method* as seen in bugid 4947125. |
1644
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1447 // If the vep() points to the zombie nmethod, the memory for the nmethod |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1448 // could be flushed and the compiler and vtable stubs could still call |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1449 // through it. |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1450 if (method() != NULL && (method()->code() == this || |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1451 method()->from_compiled_entry() == verified_entry_point())) { |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1452 HandleMark hm; |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1453 method()->clear_code(); |
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1454 } |
0 | 1455 } // leave critical region under Patching_lock |
1456 | |
1538
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1457 // When the nmethod becomes zombie it is no longer alive so the |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1458 // dependencies must be flushed. nmethods in the not_entrant |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1459 // state will be flushed later when the transition to zombie |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1460 // happens or they get unloaded. |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1461 if (state == zombie) { |
1726 | 1462 { |
1463 // Flushing dependecies must be done before any possible | |
1464 // safepoint can sneak in, otherwise the oops used by the | |
1465 // dependency logic could have become stale. | |
1466 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
12080 | 1467 if (nmethod_needs_unregister) { |
1468 Universe::heap()->unregister_nmethod(this); | |
1469 } | |
1726 | 1470 flush_dependencies(NULL); |
1471 } | |
1644
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1616
diff
changeset
|
1472 |
2342
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1473 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1474 // event and it hasn't already been reported for this nmethod then |
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1475 // report it now. The event may have been reported earilier if the GC |
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1476 // marked it for unloading). JvmtiDeferredEventQueue support means |
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1477 // we no longer go to a safepoint here. |
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1478 post_compiled_method_unload(); |
1726 | 1479 |
1480 #ifdef ASSERT | |
1481 // It's no longer safe to access the oops section since zombie | |
1482 // nmethods aren't scanned for GC. | |
1483 _oops_are_stale = true; | |
1484 #endif | |
12161
e1fbb86b47e4
8016277: Crash in nmethod::is_compiled_by_c1() on x86
roland
parents:
12080
diff
changeset
|
1485 // the Method may be reclaimed by class unloading now that the |
e1fbb86b47e4
8016277: Crash in nmethod::is_compiled_by_c1() on x86
roland
parents:
12080
diff
changeset
|
1486 // nmethod is in zombie state |
e1fbb86b47e4
8016277: Crash in nmethod::is_compiled_by_c1() on x86
roland
parents:
12080
diff
changeset
|
1487 set_method(NULL); |
1538
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1488 } else { |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1489 assert(state == not_entrant, "other cases may need to be handled differently"); |
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1490 } |
12414
98031e66de15
Fix unittests
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
12411
diff
changeset
|
1491 #ifdef GRAAL |
13230
01080e31692d
fixed crash when TraceCreateZombies is enabled
Doug Simon <doug.simon@oracle.com>
parents:
13102
diff
changeset
|
1492 if (_graal_installed_code != NULL) { |
01080e31692d
fixed crash when TraceCreateZombies is enabled
Doug Simon <doug.simon@oracle.com>
parents:
13102
diff
changeset
|
1493 // Break the link between nmethod and HotSpotInstalledCode such that the nmethod can subsequently be flushed safely. |
01080e31692d
fixed crash when TraceCreateZombies is enabled
Doug Simon <doug.simon@oracle.com>
parents:
13102
diff
changeset
|
1494 HotSpotInstalledCode::set_codeBlob(_graal_installed_code, 0); |
01080e31692d
fixed crash when TraceCreateZombies is enabled
Doug Simon <doug.simon@oracle.com>
parents:
13102
diff
changeset
|
1495 } |
12414
98031e66de15
Fix unittests
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
12411
diff
changeset
|
1496 #endif |
1538
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1497 |
0 | 1498 if (TraceCreateZombies) { |
9707 | 1499 ResourceMark m; |
13230
01080e31692d
fixed crash when TraceCreateZombies is enabled
Doug Simon <doug.simon@oracle.com>
parents:
13102
diff
changeset
|
1500 tty->print_cr("nmethod <" INTPTR_FORMAT "> %s code made %s", this, this->method() ? this->method()->name_and_sig_as_C_string() : "null", (state == not_entrant) ? "not entrant" : "zombie"); |
0 | 1501 } |
1502 | |
13074
78da3894b86f
8027593: performance drop with constrained codecache starting with hs25 b111
anoll
parents:
13071
diff
changeset
|
1503 NMethodSweeper::report_state_change(this); |
1109
032260830071
5057818: codecache full and compiler disabled in bigapps fastdebug run
never
parents:
994
diff
changeset
|
1504 return true; |
0 | 1505 } |
1506 | |
1507 void nmethod::flush() { | |
1508 // Note that there are no valid oops in the nmethod anymore. | |
1509 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1510 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1511 | |
1512 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1513 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1514 |
1515 // completely deallocate this method | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4006
diff
changeset
|
1516 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1517 if (PrintMethodFlushing) { |
1202 | 1518 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1519 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1520 } |
1521 | |
1522 // We need to deallocate any ExceptionCache data. | |
1523 // Note that we do not need to grab the nmethod lock for this, it | |
1524 // better be thread safe if we're disposing of it! | |
1525 ExceptionCache* ec = exception_cache(); | |
1526 set_exception_cache(NULL); | |
1527 while(ec != NULL) { | |
1528 ExceptionCache* next = ec->next(); | |
1529 delete ec; | |
1530 ec = next; | |
1531 } | |
1532 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1533 if (on_scavenge_root_list()) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1534 CodeCache::drop_scavenge_root_nmethod(this); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1535 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1536 |
1692 | 1537 #ifdef SHARK |
1845
a222fcfba398
6990549: Zero and Shark fixes after 6978355 and 6953144
twisti
parents:
1784
diff
changeset
|
1538 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1539 #endif // SHARK |
1540 | |
0 | 1541 ((CodeBlob*)(this))->flush(); |
1542 | |
1543 CodeCache::free(this); | |
1544 } | |
1545 | |
1546 | |
1547 // | |
1548 // Notify all classes this nmethod is dependent on that it is no | |
1549 // longer dependent. This should only be called in two situations. | |
1550 // First, when a nmethod transitions to a zombie all dependents need | |
1551 // to be clear. Since zombification happens at a safepoint there's no | |
1552 // synchronization issues. The second place is a little more tricky. | |
1553 // During phase 1 of mark sweep class unloading may happen and as a | |
1554 // result some nmethods may get unloaded. In this case the flushing | |
1555 // of dependencies must happen during phase 1 since after GC any | |
1556 // dependencies in the unloaded nmethod won't be updated, so | |
1557 // traversing the dependency information in unsafe. In that case this | |
1558 // function is called with a non-NULL argument and this function only | |
1559 // notifies instanceKlasses that are reachable | |
1560 | |
1561 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
bfe29ec02863
6950075: nmethod sweeper should operate concurrently
never
parents:
1490
diff
changeset
|
1562 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1563 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1564 "is_alive is non-NULL if and only if we are called during GC"); | |
1565 if (!has_flushed_dependencies()) { | |
1566 set_has_flushed_dependencies(); | |
1567 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1568 Klass* klass = deps.context_type(); |
0 | 1569 if (klass == NULL) continue; // ignore things like evol_method |
1570 | |
1571 // During GC the is_alive closure is non-NULL, and is used to | |
1572 // determine liveness of dependees that need to be updated. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1573 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1574 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1575 } |
1576 } | |
1577 } | |
1578 } | |
1579 | |
1580 | |
1581 // If this oop is not live, the nmethod can be unloaded. | |
6787
8966c2d65d96
7200470: KeepAliveClosure not needed in CodeCache::do_unloading
brutisso
parents:
6725
diff
changeset
|
1582 bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) { |
0 | 1583 assert(root != NULL, "just checking"); |
1584 oop obj = *root; | |
1585 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1586 return false; | |
1587 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1588 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1589 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1590 // simply because one of its constant oops has gone dead. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1591 // No actual classes need to be unloaded in order for this to occur. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
1592 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1593 make_unloaded(is_alive, obj); |
1594 return true; | |
1595 } | |
1596 | |
1597 // ------------------------------------------------------------------ | |
1598 // post_compiled_method_load_event | |
1599 // new method for install_code() path | |
1600 // Transfer information from compilation to jvmti | |
1601 void nmethod::post_compiled_method_load_event() { | |
1602 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1603 Method* moop = method(); |
4006 | 1604 HOTSPOT_COMPILED_METHOD_LOAD( |
1605 (char *) moop->klass_name()->bytes(), | |
1606 moop->klass_name()->utf8_length(), | |
1607 (char *) moop->name()->bytes(), | |
1608 moop->name()->utf8_length(), | |
1609 (char *) moop->signature()->bytes(), | |
1610 moop->signature()->utf8_length(), | |
1611 insts_begin(), insts_size()); | |
0 | 1612 |
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1613 if (JvmtiExport::should_post_compiled_method_load() || |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1614 JvmtiExport::should_post_compiled_method_unload()) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1615 get_and_cache_jmethod_id(); |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1616 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1617 |
0 | 1618 if (JvmtiExport::should_post_compiled_method_load()) { |
2195
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1619 // Let the Service thread (which is a real Java thread) post the event |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1620 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1621 JvmtiDeferredEventQueue::enqueue( |
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
2177
diff
changeset
|
1622 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1623 } |
1624 } | |
1625 | |
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1626 jmethodID nmethod::get_and_cache_jmethod_id() { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1627 if (_jmethod_id == NULL) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1628 // Cache the jmethod_id since it can no longer be looked up once the |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1629 // method itself has been marked for unloading. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1630 _jmethod_id = method()->jmethod_id(); |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1631 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1632 return _jmethod_id; |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1633 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1634 |
0 | 1635 void nmethod::post_compiled_method_unload() { |
1577
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1636 if (unload_reported()) { |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1637 // During unloading we transition to unloaded and then to zombie |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1638 // and the unloading is reported during the first transition. |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1639 return; |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1640 } |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1641 |
0 | 1642 assert(_method != NULL && !is_unloaded(), "just checking"); |
1643 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1644 | |
1645 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1646 // post the event. Sometime later this nmethod will be made a zombie |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1647 // by the sweeper but the Method* will not be valid at that point. |
1616
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1648 // If the _jmethod_id is null then no load event was ever requested |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1649 // so don't bother posting the unload. The main reason for this is |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
1650 // that the jmethodID is a weak reference to the Method* so if |
1616
38e8278318ca
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1651 // it's being unloaded there's no way to look it up since the weak |
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1652 // ref will have been cleared. |
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1653 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1654 assert(!unload_reported(), "already unloaded"); |
2195
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1655 JvmtiDeferredEvent event = |
2342
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1656 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
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1657 _jmethod_id, insts_begin()); |
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1658 if (SafepointSynchronize::is_at_safepoint()) { |
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1659 // Don't want to take the queueing lock. Add it as pending and |
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1660 // it will get enqueued later. |
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1661 JvmtiDeferredEventQueue::add_pending_event(event); |
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1662 } else { |
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1663 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1664 JvmtiDeferredEventQueue::enqueue(event); |
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1665 } |
0 | 1666 } |
1667 | |
1668 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1669 // any time. As the nmethod is being unloaded now we mark it has | |
1670 // having the unload event reported - this will ensure that we don't | |
1671 // attempt to report the event in the unlikely scenario where the | |
1672 // event is enabled at the time the nmethod is made a zombie. | |
1673 set_unload_reported(); | |
1674 } | |
1675 | |
1676 // This is called at the end of the strong tracing/marking phase of a | |
1677 // GC to unload an nmethod if it contains otherwise unreachable | |
1678 // oops. | |
1679 | |
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1680 void nmethod::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 1681 // Make sure the oop's ready to receive visitors |
1682 assert(!is_zombie() && !is_unloaded(), | |
1683 "should not call follow on zombie or unloaded nmethod"); | |
1684 | |
1685 // If the method is not entrant then a JMP is plastered over the | |
1686 // first few bytes. If an oop in the old code was there, that oop | |
1687 // should not get GC'd. Skip the first few bytes of oops on | |
1688 // not-entrant methods. | |
1689 address low_boundary = verified_entry_point(); | |
1690 if (is_not_entrant()) { | |
1691 low_boundary += NativeJump::instruction_size; | |
1692 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1693 // (See comment above.) | |
1694 } | |
1695 | |
1696 // The RedefineClasses() API can cause the class unloading invariant | |
1697 // to no longer be true. See jvmtiExport.hpp for details. | |
1698 // Also, leave a debugging breadcrumb in local flag. | |
1699 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1700 if (a_class_was_redefined) { | |
1701 // This set of the unloading_occurred flag is done before the | |
1702 // call to post_compiled_method_unload() so that the unloading | |
1703 // of this nmethod is reported. | |
1704 unloading_occurred = true; | |
1705 } | |
1706 | |
9707 | 1707 #ifdef GRAAL |
1708 // Follow Graal method | |
1709 if (_graal_installed_code != NULL) { | |
1710 if (HotSpotNmethod::isDefault(_graal_installed_code)) { | |
1711 if (!is_alive->do_object_b(_graal_installed_code)) { | |
1712 _graal_installed_code = NULL; | |
1713 } | |
1714 } else { | |
1715 if (can_unload(is_alive, (oop*)&_graal_installed_code, unloading_occurred)) { | |
1716 return; | |
1717 } | |
1718 } | |
1719 } | |
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1720 |
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1721 if (_speculation_log != NULL) { |
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1722 if (!is_alive->do_object_b(_speculation_log)) { |
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1723 _speculation_log = NULL; |
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1724 } |
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1725 } |
9707 | 1726 #endif |
1727 | |
0 | 1728 // Exception cache |
1729 ExceptionCache* ec = exception_cache(); | |
1730 while (ec != NULL) { | |
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1731 Klass* ex_klass = ec->exception_type(); |
0 | 1732 ExceptionCache* next_ec = ec->next(); |
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1733 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { |
0 | 1734 remove_from_exception_cache(ec); |
1735 } | |
1736 ec = next_ec; | |
1737 } | |
1738 | |
1739 // If class unloading occurred we first iterate over all inline caches and | |
1740 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1741 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1742 // iteration below. | |
1743 if (unloading_occurred) { | |
1744 RelocIterator iter(this, low_boundary); | |
1745 while(iter.next()) { | |
1746 if (iter.type() == relocInfo::virtual_call_type) { | |
1747 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
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1748 if (ic->is_icholder_call()) { |
0 | 1749 // The only exception is compiledICHolder oops which may |
1750 // yet be marked below. (We check this further below). | |
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1751 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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1752 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
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1753 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
13441 | 1754 continue; |
1755 } | |
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1756 } else { |
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1757 Metadata* ic_oop = ic->cached_metadata(); |
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1758 if (ic_oop != NULL) { |
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1759 if (ic_oop->is_klass()) { |
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1760 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
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1761 continue; |
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1762 } |
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1763 } else if (ic_oop->is_method()) { |
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1764 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
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1765 continue; |
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1766 } |
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1767 } else { |
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1768 ShouldNotReachHere(); |
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1769 } |
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1770 } |
13441 | 1771 } |
1772 ic->set_to_clean(); | |
0 | 1773 } |
1774 } | |
1775 } | |
1776 | |
1777 // Compiled code | |
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1778 { |
0 | 1779 RelocIterator iter(this, low_boundary); |
1780 while (iter.next()) { | |
1781 if (iter.type() == relocInfo::oop_type) { | |
1782 oop_Relocation* r = iter.oop_reloc(); | |
1783 // In this loop, we must only traverse those oops directly embedded in | |
1784 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1785 assert(1 == (r->oop_is_immediate()) + | |
1786 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1787 "oop must be found in exactly one place"); | |
1788 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
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1789 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { |
0 | 1790 return; |
1791 } | |
1792 } | |
1793 } | |
1794 } | |
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1795 } |
0 | 1796 |
1797 | |
1798 // Scopes | |
1799 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1800 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
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1801 if (can_unload(is_alive, p, unloading_occurred)) { |
0 | 1802 return; |
1803 } | |
1804 } | |
1805 | |
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1806 // Ensure that all metadata is still alive |
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1807 verify_metadata_loaders(low_boundary, is_alive); |
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1808 } |
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1809 |
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1810 #ifdef ASSERT |
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1811 |
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1812 class CheckClass : AllStatic { |
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1813 static BoolObjectClosure* _is_alive; |
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1814 |
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1815 // Check class_loader is alive for this bit of metadata. |
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1816 static void check_class(Metadata* md) { |
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1817 Klass* klass = NULL; |
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1818 if (md->is_klass()) { |
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1819 klass = ((Klass*)md); |
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1820 } else if (md->is_method()) { |
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1821 klass = ((Method*)md)->method_holder(); |
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1822 } else if (md->is_methodData()) { |
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1823 klass = ((MethodData*)md)->method()->method_holder(); |
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1824 } else { |
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1825 md->print(); |
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1826 ShouldNotReachHere(); |
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1827 } |
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1828 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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1829 } |
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1830 public: |
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1831 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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1832 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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1833 _is_alive = is_alive; |
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1834 nm->metadata_do(check_class); |
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1835 } |
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1836 }; |
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1837 |
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1838 // This is called during a safepoint so can use static data |
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1839 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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1840 #endif // ASSERT |
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1841 |
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1842 |
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1843 // Processing of oop references should have been sufficient to keep |
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1844 // all strong references alive. Any weak references should have been |
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1845 // cleared as well. Visit all the metadata and ensure that it's |
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1846 // really alive. |
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1847 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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1848 #ifdef ASSERT |
0 | 1849 RelocIterator iter(this, low_boundary); |
1850 while (iter.next()) { | |
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1851 // static_stub_Relocations may have dangling references to |
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1852 // Method*s so trim them out here. Otherwise it looks like |
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1853 // compiled code is maintaining a link to dead metadata. |
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1854 address static_call_addr = NULL; |
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1855 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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1856 CompiledIC* cic = CompiledIC_at(iter.reloc()); |
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1857 if (!cic->is_call_to_interpreted()) { |
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1858 static_call_addr = iter.addr(); |
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1859 } |
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1860 } else if (iter.type() == relocInfo::static_call_type) { |
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1861 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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1862 if (!csc->is_call_to_interpreted()) { |
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1863 static_call_addr = iter.addr(); |
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1864 } |
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1865 } |
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1866 if (static_call_addr != NULL) { |
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1867 RelocIterator sciter(this, low_boundary); |
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1868 while (sciter.next()) { |
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1869 if (sciter.type() == relocInfo::static_stub_type && |
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1870 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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1871 sciter.static_stub_reloc()->clear_inline_cache(); |
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1872 } |
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1873 } |
0 | 1874 } |
1875 } | |
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1876 // Check that the metadata embedded in the nmethod is alive |
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1877 CheckClass::do_check_class(is_alive, this); |
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1878 #endif |
0 | 1879 } |
1880 | |
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1881 |
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1882 // Iterate over metadata calling this function. Used by RedefineClasses |
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1883 void nmethod::metadata_do(void f(Metadata*)) { |
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1884 address low_boundary = verified_entry_point(); |
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1885 if (is_not_entrant()) { |
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1886 low_boundary += NativeJump::instruction_size; |
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1887 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1888 // (See comment above.) |
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1889 } |
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1890 { |
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1891 // Visit all immediate references that are embedded in the instruction stream. |
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1892 RelocIterator iter(this, low_boundary); |
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1893 while (iter.next()) { |
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1894 if (iter.type() == relocInfo::metadata_type ) { |
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1895 metadata_Relocation* r = iter.metadata_reloc(); |
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1896 // In this lmetadata, we must only follow those metadatas directly embedded in |
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1897 // the code. Other metadatas (oop_index>0) are seen as part of |
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1898 // the metadata section below. |
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1899 assert(1 == (r->metadata_is_immediate()) + |
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1900 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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1901 "metadata must be found in exactly one place"); |
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1902 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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1903 Metadata* md = r->metadata_value(); |
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1904 f(md); |
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1905 } |
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1906 } else if (iter.type() == relocInfo::virtual_call_type) { |
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1907 // Check compiledIC holders associated with this nmethod |
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1908 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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1909 if (ic->is_icholder_call()) { |
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1910 CompiledICHolder* cichk = ic->cached_icholder(); |
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1911 f(cichk->holder_method()); |
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1912 f(cichk->holder_klass()); |
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1913 } else { |
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1914 Metadata* ic_oop = ic->cached_metadata(); |
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1915 if (ic_oop != NULL) { |
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1916 f(ic_oop); |
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1917 } |
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1918 } |
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1919 } |
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1920 } |
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1921 } |
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1922 |
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1923 // Visit the metadata section |
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1924 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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1925 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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1926 Metadata* md = *p; |
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1927 f(md); |
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1928 } |
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1929 |
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1930 // Call function Method*, not embedded in these other places. |
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1931 if (_method != NULL) f(_method); |
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1932 } |
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1933 |
12080 | 1934 void nmethod::oops_do(OopClosure* f, bool allow_zombie) { |
0 | 1935 // make sure the oops ready to receive visitors |
12080 | 1936 assert(allow_zombie || !is_zombie(), "should not call follow on zombie nmethod"); |
1937 assert(!is_unloaded(), "should not call follow on unloaded nmethod"); | |
0 | 1938 |
1939 // If the method is not entrant or zombie then a JMP is plastered over the | |
1940 // first few bytes. If an oop in the old code was there, that oop | |
1941 // should not get GC'd. Skip the first few bytes of oops on | |
1942 // not-entrant methods. | |
1943 address low_boundary = verified_entry_point(); | |
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1944 if (is_not_entrant() || is_zombie()) { |
0 | 1945 low_boundary += NativeJump::instruction_size; |
1946 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1947 // (See comment above.) | |
1948 } | |
1949 | |
9707 | 1950 #ifdef GRAAL |
1951 if (_graal_installed_code != NULL) { | |
1952 f->do_oop((oop*) &_graal_installed_code); | |
1953 } | |
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1954 if (_speculation_log != NULL) { |
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1955 f->do_oop((oop*) &_speculation_log); |
9707 | 1956 } |
1957 #endif | |
1958 | |
0 | 1959 RelocIterator iter(this, low_boundary); |
941 | 1960 |
0 | 1961 while (iter.next()) { |
1962 if (iter.type() == relocInfo::oop_type ) { | |
1963 oop_Relocation* r = iter.oop_reloc(); | |
1964 // In this loop, we must only follow those oops directly embedded in | |
1965 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1966 assert(1 == (r->oop_is_immediate()) + |
1967 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1968 "oop must be found in exactly one place"); | |
0 | 1969 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1970 f->do_oop(r->oop_addr()); | |
1971 } | |
1972 } | |
1973 } | |
1974 | |
1975 // Scopes | |
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1976 // This includes oop constants not inlined in the code stream. |
0 | 1977 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1978 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1979 f->do_oop(p); | |
1980 } | |
1981 } | |
1982 | |
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1983 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1984 |
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1985 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1986 |
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1987 // An nmethod is "marked" if its _mark_link is set non-null. |
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1988 // Even if it is the end of the linked list, it will have a non-null link value, |
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1989 // as long as it is on the list. |
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1990 // This code must be MP safe, because it is used from parallel GC passes. |
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1991 bool nmethod::test_set_oops_do_mark() { |
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1992 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1993 nmethod* observed_mark_link = _oops_do_mark_link; |
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1994 if (observed_mark_link == NULL) { |
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1995 // Claim this nmethod for this thread to mark. |
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1996 observed_mark_link = (nmethod*) |
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1997 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1998 if (observed_mark_link == NULL) { |
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1999 |
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2000 // Atomically append this nmethod (now claimed) to the head of the list: |
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2001 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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2002 for (;;) { |
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2003 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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2004 _oops_do_mark_link = required_mark_nmethods; |
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2005 observed_mark_nmethods = (nmethod*) |
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2006 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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2007 if (observed_mark_nmethods == required_mark_nmethods) |
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2008 break; |
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2009 } |
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2010 // Mark was clear when we first saw this guy. |
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2011 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
989
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2012 return false; |
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2013 } |
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2014 } |
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2015 // On fall through, another racing thread marked this nmethod before we did. |
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2016 return true; |
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2017 } |
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2018 |
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2019 void nmethod::oops_do_marking_prologue() { |
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2020 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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2021 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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2022 // We use cmpxchg_ptr instead of regular assignment here because the user |
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2023 // may fork a bunch of threads, and we need them all to see the same state. |
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2024 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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2025 guarantee(observed == NULL, "no races in this sequential code"); |
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2026 } |
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2027 |
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2028 void nmethod::oops_do_marking_epilogue() { |
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2029 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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2030 nmethod* cur = _oops_do_mark_nmethods; |
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2031 while (cur != NMETHOD_SENTINEL) { |
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2032 assert(cur != NULL, "not NULL-terminated"); |
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2033 nmethod* next = cur->_oops_do_mark_link; |
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2034 cur->_oops_do_mark_link = NULL; |
2375
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2035 cur->fix_oop_relocations(); |
2405
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2036 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
989
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2037 cur = next; |
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2038 } |
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2039 void* required = _oops_do_mark_nmethods; |
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2040 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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2041 guarantee(observed == required, "no races in this sequential code"); |
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2042 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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2043 } |
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2044 |
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2045 class DetectScavengeRoot: public OopClosure { |
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2046 bool _detected_scavenge_root; |
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2047 public: |
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2048 DetectScavengeRoot() : _detected_scavenge_root(false) |
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2049 { NOT_PRODUCT(_print_nm = NULL); } |
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2050 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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2051 virtual void do_oop(oop* p) { |
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2052 if ((*p) != NULL && (*p)->is_scavengable()) { |
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2053 NOT_PRODUCT(maybe_print(p)); |
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2054 _detected_scavenge_root = true; |
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2055 } |
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2056 } |
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2057 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2058 |
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2059 #ifndef PRODUCT |
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2060 nmethod* _print_nm; |
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2061 void maybe_print(oop* p) { |
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2062 if (_print_nm == NULL) return; |
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2063 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
3377
2aa9ddbb9e60
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2064 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
989
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2065 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
12316
190899198332
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2066 (void *)(*p), (intptr_t)p); |
989
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2067 (*p)->print(); |
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2068 } |
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2069 #endif //PRODUCT |
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2070 }; |
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2071 |
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2072 bool nmethod::detect_scavenge_root_oops() { |
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2073 DetectScavengeRoot detect_scavenge_root; |
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2074 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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2075 oops_do(&detect_scavenge_root); |
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2076 return detect_scavenge_root.detected_scavenge_root(); |
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2077 } |
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2078 |
0 | 2079 // Method that knows how to preserve outgoing arguments at call. This method must be |
2080 // called with a frame corresponding to a Java invoke | |
2081 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 2082 #ifndef SHARK |
0 | 2083 if (!method()->is_native()) { |
2084 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 2085 Bytecode_invoke call(ssd.method(), ssd.bci()); |
10390 | 2086 bool has_receiver = call.has_receiver(); |
2087 bool has_appendix = call.has_appendix(); | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
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|
2088 Symbol* signature = call.signature(); |
10390 | 2089 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f); |
0 | 2090 } |
1692 | 2091 #endif // !SHARK |
0 | 2092 } |
2093 | |
2094 | |
2095 oop nmethod::embeddedOop_at(u_char* p) { | |
2349
4cd9add59b1e
7024866: # assert(limit == NULL || limit <= nm->code_end()) failed: in bounds
never
parents:
2321
diff
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|
2096 RelocIterator iter(this, p, p + 1); |
0 | 2097 while (iter.next()) |
2098 if (iter.type() == relocInfo::oop_type) { | |
2099 return iter.oop_reloc()->oop_value(); | |
2100 } | |
2101 return NULL; | |
2102 } | |
2103 | |
2104 | |
2105 inline bool includes(void* p, void* from, void* to) { | |
2106 return from <= p && p < to; | |
2107 } | |
2108 | |
2109 | |
2110 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
2111 assert(count >= 2, "must be sentinel values, at least"); | |
2112 | |
2113 #ifdef ASSERT | |
2114 // must be sorted and unique; we do a binary search in find_pc_desc() | |
2115 int prev_offset = pcs[0].pc_offset(); | |
2116 assert(prev_offset == PcDesc::lower_offset_limit, | |
2117 "must start with a sentinel"); | |
2118 for (int i = 1; i < count; i++) { | |
2119 int this_offset = pcs[i].pc_offset(); | |
2120 assert(this_offset > prev_offset, "offsets must be sorted"); | |
2121 prev_offset = this_offset; | |
2122 } | |
2123 assert(prev_offset == PcDesc::upper_offset_limit, | |
2124 "must end with a sentinel"); | |
2125 #endif //ASSERT | |
2126 | |
1135
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2127 // Search for MethodHandle invokes and tag the nmethod. |
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2128 for (int i = 0; i < count; i++) { |
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6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
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diff
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|
2129 if (pcs[i].is_method_handle_invoke()) { |
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6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
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|
2130 set_has_method_handle_invokes(true); |
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1109
diff
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|
2131 break; |
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1109
diff
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|
2132 } |
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|
2133 } |
2083
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6990933: assert(sender_cb) failed: sanity in frame::sender_for_interpreter_frame
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|
2134 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
1135
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2135 |
0 | 2136 int size = count * sizeof(PcDesc); |
2137 assert(scopes_pcs_size() >= size, "oob"); | |
2138 memcpy(scopes_pcs_begin(), pcs, size); | |
2139 | |
2140 // Adjust the final sentinel downward. | |
2141 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2142 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2143 last_pc->set_pc_offset(content_size() + 1); |
0 | 2144 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2145 // Fill any rounding gaps with copies of the last record. | |
2146 last_pc[1] = last_pc[0]; | |
2147 } | |
2148 // The following assert could fail if sizeof(PcDesc) is not | |
2149 // an integral multiple of oopSize (the rounding term). | |
2150 // If it fails, change the logic to always allocate a multiple | |
2151 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2152 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2153 } | |
2154 | |
2155 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2156 assert(scopes_data_size() >= size, "oob"); | |
2157 memcpy(scopes_data_begin(), buffer, size); | |
2158 } | |
2159 | |
2160 | |
2161 #ifdef ASSERT | |
2162 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2163 PcDesc* lower = nm->scopes_pcs_begin(); | |
2164 PcDesc* upper = nm->scopes_pcs_end(); | |
2165 lower += 1; // exclude initial sentinel | |
2166 PcDesc* res = NULL; | |
2167 for (PcDesc* p = lower; p < upper; p++) { | |
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2168 NOT_PRODUCT(--pc_nmethod_stats.pc_desc_tests); // don't count this call to match_desc |
0 | 2169 if (match_desc(p, pc_offset, approximate)) { |
2170 if (res == NULL) | |
2171 res = p; | |
2172 else | |
2173 res = (PcDesc*) badAddress; | |
2174 } | |
2175 } | |
2176 return res; | |
2177 } | |
2178 #endif | |
2179 | |
2180 | |
2181 // Finds a PcDesc with real-pc equal to "pc" | |
2182 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2183 address base_address = code_begin(); |
0 | 2184 if ((pc < base_address) || |
2185 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2186 return NULL; // PC is wildly out of range | |
2187 } | |
2188 int pc_offset = (int) (pc - base_address); | |
2189 | |
2190 // Check the PcDesc cache if it contains the desired PcDesc | |
2191 // (This as an almost 100% hit rate.) | |
2192 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2193 if (res != NULL) { | |
2194 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2195 return res; | |
2196 } | |
2197 | |
2198 // Fallback algorithm: quasi-linear search for the PcDesc | |
2199 // Find the last pc_offset less than the given offset. | |
2200 // The successor must be the required match, if there is a match at all. | |
2201 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2202 PcDesc* lower = scopes_pcs_begin(); | |
2203 PcDesc* upper = scopes_pcs_end(); | |
2204 upper -= 1; // exclude final sentinel | |
2205 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2206 | |
2207 #define assert_LU_OK \ | |
2208 /* invariant on lower..upper during the following search: */ \ | |
2209 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2210 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2211 assert_LU_OK; | |
2212 | |
2213 // Use the last successful return as a split point. | |
2214 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
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2215 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_searches); |
0 | 2216 if (mid->pc_offset() < pc_offset) { |
2217 lower = mid; | |
2218 } else { | |
2219 upper = mid; | |
2220 } | |
2221 | |
2222 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2223 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2224 const int RADIX = (1 << LOG2_RADIX); | |
2225 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2226 while ((mid = lower + step) < upper) { | |
2227 assert_LU_OK; | |
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2228 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_searches); |
0 | 2229 if (mid->pc_offset() < pc_offset) { |
2230 lower = mid; | |
2231 } else { | |
2232 upper = mid; | |
2233 break; | |
2234 } | |
2235 } | |
2236 assert_LU_OK; | |
2237 } | |
2238 | |
2239 // Sneak up on the value with a linear search of length ~16. | |
2240 while (true) { | |
2241 assert_LU_OK; | |
2242 mid = lower + 1; | |
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2243 NOT_PRODUCT(++pc_nmethod_stats.pc_desc_searches); |
0 | 2244 if (mid->pc_offset() < pc_offset) { |
2245 lower = mid; | |
2246 } else { | |
2247 upper = mid; | |
2248 break; | |
2249 } | |
2250 } | |
2251 #undef assert_LU_OK | |
2252 | |
2253 if (match_desc(upper, pc_offset, approximate)) { | |
2254 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2255 _pc_desc_cache.add_pc_desc(upper); | |
2256 return upper; | |
2257 } else { | |
2258 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2259 return NULL; | |
2260 } | |
2261 } | |
2262 | |
2263 | |
14262
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2264 void nmethod::check_all_dependencies(DepChange& changes) { |
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2265 // Checked dependencies are allocated into this ResourceMark |
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2266 ResourceMark rm; |
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2267 |
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2268 // Turn off dependency tracing while actually testing dependencies. |
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2269 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); |
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2270 |
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2271 GenericHashtable<DependencySignature, ResourceObj>* table = new GenericHashtable<DependencySignature, ResourceObj>(11027); |
14262
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2272 // Iterate over live nmethods and check dependencies of all nmethods that are not |
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2273 // marked for deoptimization. A particular dependency is only checked once. |
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2274 for(nmethod* nm = CodeCache::alive_nmethod(CodeCache::first()); nm != NULL; nm = CodeCache::alive_nmethod(CodeCache::next(nm))) { |
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2275 if (!nm->is_marked_for_deoptimization()) { |
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2276 for (Dependencies::DepStream deps(nm); deps.next(); ) { |
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2277 // Construct abstraction of a dependency. |
14505
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2278 DependencySignature* current_sig = new DependencySignature(deps); |
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2279 // Determine if 'deps' is already checked. table->add() returns |
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2280 // 'true' if the dependency was added (i.e., was not in the hashtable). |
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2281 if (table->add(current_sig)) { |
14262
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2282 if (deps.check_dependency() != NULL) { |
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2283 // Dependency checking failed. Print out information about the failed |
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2284 // dependency and finally fail with an assert. We can fail here, since |
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2285 // dependency checking is never done in a product build. |
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2286 changes.print(); |
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2287 nm->print(); |
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2288 nm->print_dependencies(); |
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2289 assert(false, "Should have been marked for deoptimization"); |
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2290 } |
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2291 } |
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2292 } |
0 | 2293 } |
2294 } | |
2295 } | |
2296 | |
2297 bool nmethod::check_dependency_on(DepChange& changes) { | |
2298 // What has happened: | |
2299 // 1) a new class dependee has been added | |
2300 // 2) dependee and all its super classes have been marked | |
2301 bool found_check = false; // set true if we are upset | |
2302 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2303 // Evaluate only relevant dependencies. | |
2304 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2305 found_check = true; | |
2306 NOT_DEBUG(break); | |
2307 } | |
2308 } | |
2309 return found_check; | |
2310 } | |
2311 | |
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2312 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2313 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2314 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2315 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2316 if (deps.type() == Dependencies::evol_method) { | |
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2317 Method* method = deps.method_argument(0); |
0 | 2318 for (int j = 0; j < dependee_methods->length(); j++) { |
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2319 if (dependee_methods->at(j) == method) { |
0 | 2320 // RC_TRACE macro has an embedded ResourceMark |
2321 RC_TRACE(0x01000000, | |
2322 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2323 _method->method_holder()->external_name(), |
0 | 2324 _method->name()->as_C_string(), |
2325 _method->signature()->as_C_string(), compile_id(), | |
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2326 method->method_holder()->external_name(), |
0 | 2327 method->name()->as_C_string(), |
2328 method->signature()->as_C_string())); | |
2329 if (TraceDependencies || LogCompilation) | |
2330 deps.log_dependency(dependee); | |
2331 return true; | |
2332 } | |
2333 } | |
2334 } | |
2335 } | |
2336 return false; | |
2337 } | |
2338 | |
2339 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2340 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2341 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2342 if (deps.type() != Dependencies::evol_method) | |
2343 continue; | |
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2344 Method* method = deps.method_argument(0); |
0 | 2345 if (method == dependee) return true; |
2346 } | |
2347 return false; | |
2348 } | |
2349 | |
2350 | |
2351 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2352 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2353 if (is_zombie()) { |
2354 // a zombie may never be patched | |
2355 return false; | |
2356 } | |
2357 return true; | |
2358 } | |
2359 | |
2360 | |
2361 address nmethod::continuation_for_implicit_exception(address pc) { | |
2362 // Exception happened outside inline-cache check code => we are inside | |
2363 // an active nmethod => use cpc to determine a return address | |
1748 | 2364 int exception_offset = pc - code_begin(); |
0 | 2365 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2366 #ifdef ASSERT | |
2367 if (cont_offset == 0) { | |
2368 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2369 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2370 HandleMark hm(thread); | |
2371 ResourceMark rm(thread); | |
2372 CodeBlob* cb = CodeCache::find_blob(pc); | |
2373 assert(cb != NULL && cb == this, ""); | |
2374 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2375 print(); | |
2376 method()->print_codes(); | |
2377 print_code(); | |
2378 print_pcs(); | |
2379 } | |
2380 #endif | |
1250 | 2381 if (cont_offset == 0) { |
2382 // Let the normal error handling report the exception | |
2383 return NULL; | |
2384 } | |
1748 | 2385 return code_begin() + cont_offset; |
0 | 2386 } |
2387 | |
2388 | |
2389 | |
2390 void nmethod_init() { | |
2391 // make sure you didn't forget to adjust the filler fields | |
2392 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2393 } | |
2394 | |
2395 | |
2396 //------------------------------------------------------------------------------------------- | |
2397 | |
2398 | |
2399 // QQQ might we make this work from a frame?? | |
2400 nmethodLocker::nmethodLocker(address pc) { | |
2401 CodeBlob* cb = CodeCache::find_blob(pc); | |
2402 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2403 _nm = (nmethod*)cb; | |
2404 lock_nmethod(_nm); | |
2405 } | |
2406 | |
2342
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2407 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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|
2408 // should pass zombie_ok == true. |
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2409 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2410 if (nm == NULL) return; |
2411 Atomic::inc(&nm->_lock_count); | |
2342
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2412 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2413 } |
2414 | |
2415 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2416 if (nm == NULL) return; | |
2417 Atomic::dec(&nm->_lock_count); | |
2418 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2419 } | |
2420 | |
1204 | 2421 |
2422 // ----------------------------------------------------------------------------- | |
2423 // nmethod::get_deopt_original_pc | |
2424 // | |
2425 // Return the original PC for the given PC if: | |
2426 // (a) the given PC belongs to a nmethod and | |
2427 // (b) it is a deopt PC | |
2428 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2429 if (fr->cb() == NULL) return NULL; | |
2430 | |
2431 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2432 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2433 return nm->get_original_pc(fr); | |
2434 | |
2435 return NULL; | |
0 | 2436 } |
2437 | |
2438 | |
2439 // ----------------------------------------------------------------------------- | |
1135
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2440 // MethodHandle |
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2441 |
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2442 bool nmethod::is_method_handle_return(address return_pc) { |
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2443 if (!has_method_handle_invokes()) return false; |
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2444 PcDesc* pd = pc_desc_at(return_pc); |
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2445 if (pd == NULL) |
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2446 return false; |
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2447 return pd->is_method_handle_invoke(); |
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2448 } |
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2449 |
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2450 |
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2451 // ----------------------------------------------------------------------------- |
0 | 2452 // Verification |
2453 | |
989
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2454 class VerifyOopsClosure: public OopClosure { |
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2455 nmethod* _nm; |
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|
2456 bool _ok; |
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|
2457 public: |
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2458 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2459 bool ok() { return _ok; } |
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2460 virtual void do_oop(oop* p) { |
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2461 if ((*p) == NULL || (*p)->is_oop()) return; |
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2462 if (_ok) { |
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2463 _nm->print_nmethod(true); |
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|
2464 _ok = false; |
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|
2465 } |
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2466 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2467 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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|
2468 } |
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2469 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2470 }; |
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2471 |
0 | 2472 void nmethod::verify() { |
2473 | |
2474 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2475 // seems odd. | |
2476 | |
2477 if( is_zombie() || is_not_entrant() ) | |
2478 return; | |
2479 | |
2480 // Make sure all the entry points are correctly aligned for patching. | |
2481 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2482 | |
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2483 // assert(method()->is_oop(), "must be valid"); |
0 | 2484 |
2485 ResourceMark rm; | |
2486 | |
2487 if (!CodeCache::contains(this)) { | |
1490
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|
2488 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2489 } |
2490 | |
2491 if(is_native_method() ) | |
2492 return; | |
2493 | |
2494 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2495 if (nm != this) { | |
1490
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|
2496 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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|
2497 this)); |
0 | 2498 } |
2499 | |
2500 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2501 if (! p->verify(this)) { | |
2502 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2503 } | |
2504 } | |
2505 | |
989
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2506 VerifyOopsClosure voc(this); |
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|
2507 oops_do(&voc); |
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2508 assert(voc.ok(), "embedded oops must be OK"); |
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|
2509 verify_scavenge_root_oops(); |
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2510 |
0 | 2511 verify_scopes(); |
2512 } | |
2513 | |
2514 | |
2515 void nmethod::verify_interrupt_point(address call_site) { | |
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|
2516 // Verify IC only when nmethod installation is finished. |
13441 | 2517 bool is_installed = (method()->code() == this) // nmethod is in state 'in_use' and installed |
2518 || !this->is_in_use(); // nmethod is installed, but not in 'in_use' state | |
13071
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|
2519 if (is_installed) { |
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2520 Thread *cur = Thread::current(); |
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2521 if (CompiledIC_lock->owner() == cur || |
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|
2522 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
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|
2523 SafepointSynchronize::is_at_safepoint())) { |
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|
2524 CompiledIC_at(this, call_site); |
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2525 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
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|
2526 } else { |
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|
2527 MutexLocker ml_verify (CompiledIC_lock); |
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2528 CompiledIC_at(this, call_site); |
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|
2529 } |
0 | 2530 } |
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2531 |
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|
2532 PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address()); |
0 | 2533 assert(pd != NULL, "PcDesc must exist"); |
2534 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
9707 | 2535 pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(), |
1253
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changeset
|
2536 pd->return_oop()); |
0 | 2537 !sd->is_top(); sd = sd->sender()) { |
2538 sd->verify(); | |
2539 } | |
2540 } | |
2541 | |
2542 void nmethod::verify_scopes() { | |
2543 if( !method() ) return; // Runtime stubs have no scope | |
2544 if (method()->is_native()) return; // Ignore stub methods. | |
2545 // iterate through all interrupt point | |
2546 // and verify the debug information is valid. | |
2547 RelocIterator iter((nmethod*)this); | |
2548 while (iter.next()) { | |
2549 address stub = NULL; | |
2550 switch (iter.type()) { | |
2551 case relocInfo::virtual_call_type: | |
2552 verify_interrupt_point(iter.addr()); | |
2553 break; | |
2554 case relocInfo::opt_virtual_call_type: | |
2555 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2556 verify_interrupt_point(iter.addr()); | |
2557 break; | |
2558 case relocInfo::static_call_type: | |
2559 stub = iter.static_call_reloc()->static_stub(); | |
2560 //verify_interrupt_point(iter.addr()); | |
2561 break; | |
2562 case relocInfo::runtime_call_type: | |
2563 address destination = iter.reloc()->value(); | |
2564 // Right now there is no way to find out which entries support | |
2565 // an interrupt point. It would be nice if we had this | |
2566 // information in a table. | |
2567 break; | |
2568 } | |
2569 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2570 } | |
2571 } | |
2572 | |
2573 | |
2574 // ----------------------------------------------------------------------------- | |
2575 // Non-product code | |
2576 #ifndef PRODUCT | |
2577 | |
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2578 class DebugScavengeRoot: public OopClosure { |
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|
2579 nmethod* _nm; |
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|
2580 bool _ok; |
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2581 public: |
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2582 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2583 bool ok() { return _ok; } |
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|
2584 virtual void do_oop(oop* p) { |
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2585 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2586 if (_ok) { |
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|
2587 _nm->print_nmethod(true); |
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|
2588 _ok = false; |
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|
2589 } |
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2590 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
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|
2591 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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diff
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|
2592 (*p)->print(); |
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|
2593 } |
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|
2594 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2595 }; |
0 | 2596 |
989
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|
2597 void nmethod::verify_scavenge_root_oops() { |
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2598 if (!on_scavenge_root_list()) { |
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2599 // Actually look inside, to verify the claim that it's clean. |
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2600 DebugScavengeRoot debug_scavenge_root(this); |
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2601 oops_do(&debug_scavenge_root); |
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2602 if (!debug_scavenge_root.ok()) |
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diff
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2603 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2604 } |
989
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2605 assert(scavenge_root_not_marked(), ""); |
0 | 2606 } |
2607 | |
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2608 #endif // PRODUCT |
0 | 2609 |
2610 // Printing operations | |
2611 | |
2612 void nmethod::print() const { | |
2613 ResourceMark rm; | |
2614 ttyLocker ttyl; // keep the following output all in one block | |
2615 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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diff
changeset
|
2616 tty->print("Compiled method "); |
0 | 2617 |
2618 if (is_compiled_by_c1()) { | |
2619 tty->print("(c1) "); | |
2620 } else if (is_compiled_by_c2()) { | |
2621 tty->print("(c2) "); | |
1692 | 2622 } else if (is_compiled_by_shark()) { |
2623 tty->print("(shark) "); | |
9707 | 2624 } else if (is_compiled_by_graal()) { |
2625 tty->print("(Graal) "); | |
0 | 2626 } else { |
2627 tty->print("(nm) "); | |
2628 } | |
2629 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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diff
changeset
|
2630 print_on(tty, NULL); |
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|
2631 |
0 | 2632 if (WizardMode) { |
2633 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2634 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2635 tty->print(" { "); | |
2636 if (is_in_use()) tty->print("in_use "); | |
2637 if (is_not_entrant()) tty->print("not_entrant "); | |
2638 if (is_zombie()) tty->print("zombie "); | |
2639 if (is_unloaded()) tty->print("unloaded "); | |
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|
2640 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2641 tty->print_cr("}:"); |
2642 } | |
2643 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2644 (address)this, | |
2645 (address)this + size(), | |
2646 size()); | |
2647 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2648 relocation_begin(), | |
2649 relocation_end(), | |
2650 relocation_size()); | |
1762
0878d7bae69f
6961697: move nmethod constants section before instruction section
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1748
diff
changeset
|
2651 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2652 consts_begin(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2653 consts_end(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
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diff
changeset
|
2654 consts_size()); |
1748 | 2655 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2656 insts_begin(), | |
2657 insts_end(), | |
2658 insts_size()); | |
0 | 2659 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2660 stub_begin(), | |
2661 stub_end(), | |
2662 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
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1538
diff
changeset
|
2663 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
1a5913bf5e19
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1538
diff
changeset
|
2664 oops_begin(), |
1a5913bf5e19
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1538
diff
changeset
|
2665 oops_end(), |
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|
2666 oops_size()); |
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|
2667 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
da91efe96a93
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|
2668 metadata_begin(), |
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|
2669 metadata_end(), |
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|
2670 metadata_size()); |
0 | 2671 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2672 scopes_data_begin(), | |
2673 scopes_data_end(), | |
2674 scopes_data_size()); | |
2675 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2676 scopes_pcs_begin(), | |
2677 scopes_pcs_end(), | |
2678 scopes_pcs_size()); | |
2679 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2680 dependencies_begin(), | |
2681 dependencies_end(), | |
2682 dependencies_size()); | |
2683 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2684 handler_table_begin(), | |
2685 handler_table_end(), | |
2686 handler_table_size()); | |
2687 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2688 nul_chk_table_begin(), | |
2689 nul_chk_table_end(), | |
2690 nul_chk_table_size()); | |
2691 } | |
2692 | |
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|
2693 void nmethod::print_code() { |
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|
2694 HandleMark hm; |
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changeset
|
2695 ResourceMark m; |
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diff
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|
2696 Disassembler::decode(this); |
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diff
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|
2697 } |
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|
2698 |
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|
2699 |
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|
2700 #ifndef PRODUCT |
0 | 2701 |
2702 void nmethod::print_scopes() { | |
2703 // Find the first pc desc for all scopes in the code and print it. | |
2704 ResourceMark rm; | |
2705 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2706 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2707 continue; | |
2708 | |
2709 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2710 sd->print_on(tty, p); | |
2711 } | |
2712 } | |
2713 | |
2714 void nmethod::print_dependencies() { | |
2715 ResourceMark rm; | |
2716 ttyLocker ttyl; // keep the following output all in one block | |
2717 tty->print_cr("Dependencies:"); | |
2718 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2719 deps.print_dependency(); | |
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2720 Klass* ctxk = deps.context_type(); |
0 | 2721 if (ctxk != NULL) { |
6983 | 2722 if (ctxk->oop_is_instance() && ((InstanceKlass*)ctxk)->is_dependent_nmethod(this)) { |
2723 tty->print_cr(" [nmethod<=klass]%s", ctxk->external_name()); | |
0 | 2724 } |
2725 } | |
2726 deps.log_dependency(); // put it into the xml log also | |
2727 } | |
2728 } | |
2729 | |
2730 | |
2731 void nmethod::print_relocations() { | |
2732 ResourceMark m; // in case methods get printed via the debugger | |
2733 tty->print_cr("relocations:"); | |
2734 RelocIterator iter(this); | |
2735 iter.print(); | |
2736 if (UseRelocIndex) { | |
2737 jint* index_end = (jint*)relocation_end() - 1; | |
2738 jint index_size = *index_end; | |
2739 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2740 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2741 if (index_size > 0) { | |
2742 jint* ip; | |
2743 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2744 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2745 ip[0], | |
2746 ip[1], | |
2747 header_end()+ip[0], | |
2748 relocation_begin()-1+ip[1]); | |
2749 for (; ip < index_end; ip++) | |
2750 tty->print_cr(" (%d ?)", ip[0]); | |
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ef57c43512d6
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|
2751 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip); |
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|
2752 ip++; |
0 | 2753 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
2754 } | |
2755 } | |
2756 } | |
2757 | |
2758 | |
2759 void nmethod::print_pcs() { | |
2760 ResourceMark m; // in case methods get printed via debugger | |
2761 tty->print_cr("pc-bytecode offsets:"); | |
2762 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2763 p->print(this); | |
2764 } | |
2765 } | |
2766 | |
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2767 #endif // PRODUCT |
0 | 2768 |
2769 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2770 RelocIterator iter(this, begin, end); | |
2771 bool have_one = false; | |
2772 while (iter.next()) { | |
2773 have_one = true; | |
2774 switch (iter.type()) { | |
2775 case relocInfo::none: return "no_reloc"; | |
2776 case relocInfo::oop_type: { | |
2777 stringStream st; | |
2778 oop_Relocation* r = iter.oop_reloc(); | |
2779 oop obj = r->oop_value(); | |
2780 st.print("oop("); | |
2781 if (obj == NULL) st.print("NULL"); | |
2782 else obj->print_value_on(&st); | |
2783 st.print(")"); | |
2784 return st.as_string(); | |
2785 } | |
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2786 case relocInfo::metadata_type: { |
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|
2787 stringStream st; |
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changeset
|
2788 metadata_Relocation* r = iter.metadata_reloc(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2789 Metadata* obj = r->metadata_value(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2790 st.print("metadata("); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2791 if (obj == NULL) st.print("NULL"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2792 else obj->print_value_on(&st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2793 st.print(")"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2794 return st.as_string(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2795 } |
0 | 2796 case relocInfo::virtual_call_type: return "virtual_call"; |
2797 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2798 case relocInfo::static_call_type: return "static_call"; | |
2799 case relocInfo::static_stub_type: return "static_stub"; | |
2800 case relocInfo::runtime_call_type: return "runtime_call"; | |
2801 case relocInfo::external_word_type: return "external_word"; | |
2802 case relocInfo::internal_word_type: return "internal_word"; | |
2803 case relocInfo::section_word_type: return "section_word"; | |
2804 case relocInfo::poll_type: return "poll"; | |
2805 case relocInfo::poll_return_type: return "poll_return"; | |
2806 case relocInfo::type_mask: return "type_bit_mask"; | |
2807 } | |
2808 } | |
2809 return have_one ? "other" : NULL; | |
2810 } | |
2811 | |
2812 // Return a the last scope in (begin..end] | |
2813 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2814 PcDesc* p = pc_desc_near(begin+1); | |
2815 if (p != NULL && p->real_pc(this) <= end) { | |
2816 return new ScopeDesc(this, p->scope_decode_offset(), | |
9707 | 2817 p->obj_decode_offset(), p->should_reexecute(), p->rethrow_exception(), |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2818 p->return_oop()); |
0 | 2819 } |
2820 return NULL; | |
2821 } | |
2822 | |
6796
b31471cdc53e
7200163: add CodeComments functionality to assember stubs
kvn
parents:
6792
diff
changeset
|
2823 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const { |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2824 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2825 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
9707 | 2826 if (GRAAL_ONLY(_exception_offset >= 0 &&) block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2827 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
9707 | 2828 if (GRAAL_ONLY(_deoptimize_offset >= 0 &&) block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2829 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2830 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2831 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2832 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2833 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2834 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2835 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2836 methodHandle m = method(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2837 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2838 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2839 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2840 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2841 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2842 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2843 ResourceMark rm; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2844 int sizeargs = m->size_of_parameters(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2845 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2846 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2847 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2848 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2849 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2850 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2851 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2852 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2853 sig_bt[sig_index++] = t; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2854 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2855 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2856 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2857 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2858 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2859 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2860 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2861 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2862 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2863 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2864 int stack_slot_offset = this->frame_size() * wordSize; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2865 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2866 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2867 int arg_index = (m->is_static() ? 0 : -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2868 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2869 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2870 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2871 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2872 BasicType t = (at_this ? T_OBJECT : ss.type()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2873 assert(t == sig_bt[sig_index], "sigs in sync"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2874 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2875 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2876 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2877 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2878 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2879 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2880 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2881 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2882 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2883 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2884 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2885 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2886 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2887 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2888 if (offset == stack_slot_offset) at_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2889 stream->print("[%s+0x%x]", spname, offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2890 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2891 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2892 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2893 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2894 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2895 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2896 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2897 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2898 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2899 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2900 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2901 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2902 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2903 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2904 did_name = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2905 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2906 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2907 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2908 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2909 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2910 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2911 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2912 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2913 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2914 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2915 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2916 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2917 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2918 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2919 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2920 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2921 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2922 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2923 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2924 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2925 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2926 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2927 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2928 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2929 |
0 | 2930 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2931 // First, find an oopmap in (begin, end]. | |
2932 // We use the odd half-closed interval so that oop maps and scope descs | |
2933 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2934 address base = code_begin(); |
0 | 2935 OopMapSet* oms = oop_maps(); |
2936 if (oms != NULL) { | |
2937 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2938 OopMap* om = oms->at(i); | |
2939 address pc = base + om->offset(); | |
2940 if (pc > begin) { | |
2941 if (pc <= end) { | |
100
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2942 st->move_to(column); |
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2943 st->print("; "); |
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2944 om->print_on(st); |
0 | 2945 } |
2946 break; | |
2947 } | |
2948 } | |
2949 } | |
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2950 |
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2951 // Print any debug info present at this pc. |
0 | 2952 ScopeDesc* sd = scope_desc_in(begin, end); |
2953 if (sd != NULL) { | |
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2954 st->move_to(column); |
0 | 2955 if (sd->bci() == SynchronizationEntryBCI) { |
2956 st->print(";*synchronization entry"); | |
2957 } else { | |
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2958 if (sd->method() == NULL) { |
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2959 st->print("method is NULL"); |
0 | 2960 } else if (sd->method()->is_native()) { |
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2961 st->print("method is native"); |
0 | 2962 } else { |
2142 | 2963 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2964 st->print(";*%s", Bytecodes::name(bc)); |
2965 switch (bc) { | |
2966 case Bytecodes::_invokevirtual: | |
2967 case Bytecodes::_invokespecial: | |
2968 case Bytecodes::_invokestatic: | |
2969 case Bytecodes::_invokeinterface: | |
2970 { | |
2142 | 2971 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2972 st->print(" "); |
2142 | 2973 if (invoke.name() != NULL) |
2974 invoke.name()->print_symbol_on(st); | |
0 | 2975 else |
2976 st->print("<UNKNOWN>"); | |
2977 break; | |
2978 } | |
2979 case Bytecodes::_getfield: | |
2980 case Bytecodes::_putfield: | |
2981 case Bytecodes::_getstatic: | |
2982 case Bytecodes::_putstatic: | |
2983 { | |
2142 | 2984 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2985 st->print(" "); |
2142 | 2986 if (field.name() != NULL) |
2987 field.name()->print_symbol_on(st); | |
0 | 2988 else |
2989 st->print("<UNKNOWN>"); | |
2990 } | |
2991 } | |
2992 } | |
2993 } | |
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2994 |
0 | 2995 // Print all scopes |
2996 for (;sd != NULL; sd = sd->sender()) { | |
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2997 st->move_to(column); |
0 | 2998 st->print("; -"); |
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2999 if (sd->method() == NULL) { |
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3000 st->print("method is NULL"); |
0 | 3001 } else { |
3002 sd->method()->print_short_name(st); | |
3003 } | |
3004 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
3005 if (lineno != -1) { | |
3006 st->print("@%d (line %d)", sd->bci(), lineno); | |
3007 } else { | |
3008 st->print("@%d", sd->bci()); | |
3009 } | |
3010 st->cr(); | |
3011 } | |
3012 } | |
3013 | |
3014 // Print relocation information | |
3015 const char* str = reloc_string_for(begin, end); | |
3016 if (str != NULL) { | |
3017 if (sd != NULL) st->cr(); | |
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3018 st->move_to(column); |
0 | 3019 st->print("; {%s}", str); |
3020 } | |
1748 | 3021 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 3022 if (cont_offset != 0) { |
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3023 st->move_to(column); |
1748 | 3024 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 3025 } |
3026 | |
3027 } | |
3028 | |
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3029 #ifndef PRODUCT |
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3030 |
0 | 3031 void nmethod::print_value_on(outputStream* st) const { |
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3032 st->print("nmethod"); |
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3033 print_on(st, NULL); |
0 | 3034 } |
3035 | |
3036 void nmethod::print_calls(outputStream* st) { | |
3037 RelocIterator iter(this); | |
3038 while (iter.next()) { | |
3039 switch (iter.type()) { | |
3040 case relocInfo::virtual_call_type: | |
3041 case relocInfo::opt_virtual_call_type: { | |
3042 VerifyMutexLocker mc(CompiledIC_lock); | |
3043 CompiledIC_at(iter.reloc())->print(); | |
3044 break; | |
3045 } | |
3046 case relocInfo::static_call_type: | |
3047 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
3048 compiledStaticCall_at(iter.reloc())->print(); | |
3049 break; | |
3050 } | |
3051 } | |
3052 } | |
3053 | |
3054 void nmethod::print_handler_table() { | |
3055 ExceptionHandlerTable(this).print(); | |
3056 } | |
3057 | |
3058 void nmethod::print_nul_chk_table() { | |
1748 | 3059 ImplicitExceptionTable(this).print(code_begin()); |
0 | 3060 } |
3061 | |
3062 void nmethod::print_statistics() { | |
3063 ttyLocker ttyl; | |
3064 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
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3065 native_nmethod_stats.print_native_nmethod_stats(); |
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3066 #ifdef COMPILER1 |
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3067 c1_java_nmethod_stats.print_nmethod_stats("C1"); |
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3068 #endif |
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3069 #ifdef COMPILER2 |
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3070 c2_java_nmethod_stats.print_nmethod_stats("C2"); |
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3071 #endif |
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3072 #ifdef GRAAL |
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3073 graal_java_nmethod_stats.print_nmethod_stats("Graal"); |
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3074 #endif |
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3075 unknown_java_nmethod_stats.print_nmethod_stats("Unknown"); |
0 | 3076 DebugInformationRecorder::print_statistics(); |
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3077 pc_nmethod_stats.print_pc_stats(); |
0 | 3078 Dependencies::print_statistics(); |
3079 if (xtty != NULL) xtty->tail("statistics"); | |
3080 } | |
3081 #endif // PRODUCT |