Mercurial > hg > graal-compiler
annotate src/share/vm/compiler/compileBroker.cpp @ 6271:93c71eb28866
7188911: nightly failures after JSR 292 lazy method handle update (round 2)
Reviewed-by: kvn, jrose
author | twisti |
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date | Tue, 07 Aug 2012 14:32:08 -0700 |
parents | 1d7922586cf6 |
children | 957c266d8bc5 da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2012, 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 "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "code/codeCache.hpp" | |
29 #include "compiler/compileBroker.hpp" | |
30 #include "compiler/compileLog.hpp" | |
31 #include "compiler/compilerOracle.hpp" | |
32 #include "interpreter/linkResolver.hpp" | |
33 #include "memory/allocation.inline.hpp" | |
34 #include "oops/methodDataOop.hpp" | |
35 #include "oops/methodOop.hpp" | |
36 #include "oops/oop.inline.hpp" | |
37 #include "prims/nativeLookup.hpp" | |
38 #include "runtime/arguments.hpp" | |
39 #include "runtime/compilationPolicy.hpp" | |
40 #include "runtime/init.hpp" | |
41 #include "runtime/interfaceSupport.hpp" | |
42 #include "runtime/javaCalls.hpp" | |
43 #include "runtime/os.hpp" | |
44 #include "runtime/sharedRuntime.hpp" | |
45 #include "runtime/sweeper.hpp" | |
46 #include "utilities/dtrace.hpp" | |
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47 #include "utilities/events.hpp" |
1972 | 48 #ifdef COMPILER1 |
49 #include "c1/c1_Compiler.hpp" | |
50 #endif | |
51 #ifdef COMPILER2 | |
52 #include "opto/c2compiler.hpp" | |
53 #endif | |
54 #ifdef SHARK | |
55 #include "shark/sharkCompiler.hpp" | |
56 #endif | |
0 | 57 |
58 #ifdef DTRACE_ENABLED | |
59 | |
60 // Only bother with this argument setup if dtrace is available | |
61 | |
4006 | 62 #ifndef USDT2 |
0 | 63 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin, |
64 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t); | |
65 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end, | |
66 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool); | |
67 | |
68 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ | |
69 { \ | |
70 char* comp_name = (char*)(compiler)->name(); \ | |
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71 Symbol* klass_name = (method)->klass_name(); \ |
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72 Symbol* name = (method)->name(); \ |
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73 Symbol* signature = (method)->signature(); \ |
0 | 74 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \ |
75 comp_name, strlen(comp_name), \ | |
76 klass_name->bytes(), klass_name->utf8_length(), \ | |
77 name->bytes(), name->utf8_length(), \ | |
78 signature->bytes(), signature->utf8_length()); \ | |
79 } | |
80 | |
81 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ | |
82 { \ | |
83 char* comp_name = (char*)(compiler)->name(); \ | |
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84 Symbol* klass_name = (method)->klass_name(); \ |
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85 Symbol* name = (method)->name(); \ |
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86 Symbol* signature = (method)->signature(); \ |
0 | 87 HS_DTRACE_PROBE9(hotspot, method__compile__end, \ |
88 comp_name, strlen(comp_name), \ | |
89 klass_name->bytes(), klass_name->utf8_length(), \ | |
90 name->bytes(), name->utf8_length(), \ | |
91 signature->bytes(), signature->utf8_length(), (success)); \ | |
92 } | |
93 | |
4006 | 94 #else /* USDT2 */ |
95 | |
96 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ | |
97 { \ | |
98 char* comp_name = (char*)(compiler)->name(); \ | |
99 Symbol* klass_name = (method)->klass_name(); \ | |
100 Symbol* name = (method)->name(); \ | |
101 Symbol* signature = (method)->signature(); \ | |
102 HOTSPOT_METHOD_COMPILE_BEGIN( \ | |
103 comp_name, strlen(comp_name), \ | |
104 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
105 (char *) name->bytes(), name->utf8_length(), \ | |
106 (char *) signature->bytes(), signature->utf8_length()); \ | |
107 } | |
108 | |
109 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ | |
110 { \ | |
111 char* comp_name = (char*)(compiler)->name(); \ | |
112 Symbol* klass_name = (method)->klass_name(); \ | |
113 Symbol* name = (method)->name(); \ | |
114 Symbol* signature = (method)->signature(); \ | |
115 HOTSPOT_METHOD_COMPILE_END( \ | |
116 comp_name, strlen(comp_name), \ | |
117 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
118 (char *) name->bytes(), name->utf8_length(), \ | |
119 (char *) signature->bytes(), signature->utf8_length(), (success)); \ | |
120 } | |
121 #endif /* USDT2 */ | |
122 | |
0 | 123 #else // ndef DTRACE_ENABLED |
124 | |
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) | |
126 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) | |
127 | |
128 #endif // ndef DTRACE_ENABLED | |
129 | |
130 bool CompileBroker::_initialized = false; | |
131 volatile bool CompileBroker::_should_block = false; | |
1202 | 132 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; |
0 | 133 |
134 // The installed compiler(s) | |
135 AbstractCompiler* CompileBroker::_compilers[2]; | |
136 | |
137 // These counters are used for assigning id's to each compilation | |
138 uint CompileBroker::_compilation_id = 0; | |
139 uint CompileBroker::_osr_compilation_id = 0; | |
140 | |
141 // Debugging information | |
142 int CompileBroker::_last_compile_type = no_compile; | |
143 int CompileBroker::_last_compile_level = CompLevel_none; | |
144 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; | |
145 | |
146 // Performance counters | |
147 PerfCounter* CompileBroker::_perf_total_compilation = NULL; | |
148 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; | |
149 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; | |
150 | |
151 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; | |
152 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; | |
153 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; | |
154 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; | |
155 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; | |
156 | |
157 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; | |
158 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; | |
159 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; | |
160 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; | |
161 | |
162 PerfStringVariable* CompileBroker::_perf_last_method = NULL; | |
163 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; | |
164 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; | |
165 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; | |
166 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; | |
167 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; | |
168 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; | |
169 | |
170 // Timers and counters for generating statistics | |
171 elapsedTimer CompileBroker::_t_total_compilation; | |
172 elapsedTimer CompileBroker::_t_osr_compilation; | |
173 elapsedTimer CompileBroker::_t_standard_compilation; | |
174 | |
175 int CompileBroker::_total_bailout_count = 0; | |
176 int CompileBroker::_total_invalidated_count = 0; | |
177 int CompileBroker::_total_compile_count = 0; | |
178 int CompileBroker::_total_osr_compile_count = 0; | |
179 int CompileBroker::_total_standard_compile_count = 0; | |
180 | |
181 int CompileBroker::_sum_osr_bytes_compiled = 0; | |
182 int CompileBroker::_sum_standard_bytes_compiled = 0; | |
183 int CompileBroker::_sum_nmethod_size = 0; | |
184 int CompileBroker::_sum_nmethod_code_size = 0; | |
185 | |
1783 | 186 CompileQueue* CompileBroker::_c2_method_queue = NULL; |
187 CompileQueue* CompileBroker::_c1_method_queue = NULL; | |
0 | 188 CompileTask* CompileBroker::_task_free_list = NULL; |
189 | |
190 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL; | |
191 | |
192 | |
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193 class CompilationLog : public StringEventLog { |
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194 public: |
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195 CompilationLog() : StringEventLog("Compilation events") { |
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196 } |
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197 |
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198 void log_compile(JavaThread* thread, CompileTask* task) { |
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199 StringLogMessage lm; |
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200 stringStream msg = lm.stream(); |
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201 // msg.time_stamp().update_to(tty->time_stamp().ticks()); |
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202 task->print_compilation(&msg, true); |
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203 log(thread, "%s", (const char*)lm); |
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204 } |
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205 |
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206 void log_nmethod(JavaThread* thread, nmethod* nm) { |
4944 | 207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
208 nm->compile_id(), nm->is_osr_method() ? "%" : "", | |
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209 nm, nm->code_begin(), nm->code_end()); |
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210 } |
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211 |
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212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { |
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213 StringLogMessage lm; |
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214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); |
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215 if (retry_message != NULL) { |
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216 lm.append(" (%s)", retry_message); |
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217 } |
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218 lm.print("\n"); |
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219 log(thread, "%s", (const char*)lm); |
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220 } |
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221 }; |
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222 |
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223 static CompilationLog* _compilation_log = NULL; |
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224 |
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225 void compileBroker_init() { |
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226 if (LogEvents) { |
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227 _compilation_log = new CompilationLog(); |
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228 } |
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229 } |
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230 |
0 | 231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { |
232 CompilerThread* thread = CompilerThread::current(); | |
233 thread->set_task(task); | |
234 CompileLog* log = thread->log(); | |
235 if (log != NULL) task->log_task_start(log); | |
236 } | |
237 | |
238 CompileTaskWrapper::~CompileTaskWrapper() { | |
239 CompilerThread* thread = CompilerThread::current(); | |
240 CompileTask* task = thread->task(); | |
241 CompileLog* log = thread->log(); | |
242 if (log != NULL) task->log_task_done(log); | |
243 thread->set_task(NULL); | |
244 task->set_code_handle(NULL); | |
245 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress)); | |
246 if (task->is_blocking()) { | |
247 MutexLocker notifier(task->lock(), thread); | |
248 task->mark_complete(); | |
249 // Notify the waiting thread that the compilation has completed. | |
250 task->lock()->notify_all(); | |
251 } else { | |
252 task->mark_complete(); | |
253 | |
254 // By convention, the compiling thread is responsible for | |
255 // recycling a non-blocking CompileTask. | |
256 CompileBroker::free_task(task); | |
257 } | |
258 } | |
259 | |
260 | |
261 // ------------------------------------------------------------------ | |
262 // CompileTask::initialize | |
263 void CompileTask::initialize(int compile_id, | |
264 methodHandle method, | |
265 int osr_bci, | |
266 int comp_level, | |
267 methodHandle hot_method, | |
268 int hot_count, | |
269 const char* comment, | |
270 bool is_blocking) { | |
271 assert(!_lock->is_locked(), "bad locking"); | |
272 | |
273 _compile_id = compile_id; | |
274 _method = JNIHandles::make_global(method); | |
275 _osr_bci = osr_bci; | |
276 _is_blocking = is_blocking; | |
277 _comp_level = comp_level; | |
278 _num_inlined_bytecodes = 0; | |
279 | |
280 _is_complete = false; | |
281 _is_success = false; | |
282 _code_handle = NULL; | |
283 | |
284 _hot_method = NULL; | |
285 _hot_count = hot_count; | |
286 _time_queued = 0; // tidy | |
287 _comment = comment; | |
288 | |
289 if (LogCompilation) { | |
290 _time_queued = os::elapsed_counter(); | |
291 if (hot_method.not_null()) { | |
292 if (hot_method == method) { | |
293 _hot_method = _method; | |
294 } else { | |
295 _hot_method = JNIHandles::make_global(hot_method); | |
296 } | |
297 } | |
298 } | |
299 | |
300 _next = NULL; | |
301 } | |
302 | |
303 // ------------------------------------------------------------------ | |
304 // CompileTask::code/set_code | |
305 nmethod* CompileTask::code() const { | |
306 if (_code_handle == NULL) return NULL; | |
307 return _code_handle->code(); | |
308 } | |
309 void CompileTask::set_code(nmethod* nm) { | |
310 if (_code_handle == NULL && nm == NULL) return; | |
311 guarantee(_code_handle != NULL, ""); | |
312 _code_handle->set_code(nm); | |
313 if (nm == NULL) _code_handle = NULL; // drop the handle also | |
314 } | |
315 | |
316 // ------------------------------------------------------------------ | |
317 // CompileTask::free | |
318 void CompileTask::free() { | |
319 set_code(NULL); | |
320 assert(!_lock->is_locked(), "Should not be locked when freed"); | |
321 if (_hot_method != NULL && _hot_method != _method) { | |
322 JNIHandles::destroy_global(_hot_method); | |
323 } | |
324 JNIHandles::destroy_global(_method); | |
325 } | |
326 | |
327 | |
328 // ------------------------------------------------------------------ | |
329 // CompileTask::print | |
330 void CompileTask::print() { | |
331 tty->print("<CompileTask compile_id=%d ", _compile_id); | |
332 tty->print("method="); | |
333 ((methodOop)JNIHandles::resolve(_method))->print_name(tty); | |
334 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", | |
335 _osr_bci, bool_to_str(_is_blocking), | |
336 bool_to_str(_is_complete), bool_to_str(_is_success)); | |
337 } | |
338 | |
1783 | 339 |
0 | 340 // ------------------------------------------------------------------ |
341 // CompileTask::print_line_on_error | |
342 // | |
343 // This function is called by fatal error handler when the thread | |
344 // causing troubles is a compiler thread. | |
345 // | |
346 // Do not grab any lock, do not allocate memory. | |
347 // | |
348 // Otherwise it's the same as CompileTask::print_line() | |
349 // | |
350 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { | |
351 // print compiler name | |
352 st->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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353 print_compilation(st); |
0 | 354 } |
355 | |
356 // ------------------------------------------------------------------ | |
357 // CompileTask::print_line | |
358 void CompileTask::print_line() { | |
359 ttyLocker ttyl; // keep the following output all in one block | |
360 // print compiler name if requested | |
361 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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362 print_compilation(); |
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363 } |
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364 |
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365 |
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366 // ------------------------------------------------------------------ |
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367 // CompileTask::print_compilation_impl |
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368 void CompileTask::print_compilation_impl(outputStream* st, methodOop method, int compile_id, int comp_level, |
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369 bool is_osr_method, int osr_bci, bool is_blocking, |
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370 const char* msg, bool short_form) { |
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371 if (!short_form) { |
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372 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp |
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373 } |
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374 st->print("%4d ", compile_id); // print compilation number |
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375 |
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376 // For unloaded methods the transition to zombie occurs after the |
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377 // method is cleared so it's impossible to report accurate |
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378 // information for that case. |
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379 bool is_synchronized = false; |
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380 bool has_exception_handler = false; |
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381 bool is_native = false; |
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382 if (method != NULL) { |
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383 is_synchronized = method->is_synchronized(); |
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384 has_exception_handler = method->has_exception_handler(); |
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385 is_native = method->is_native(); |
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386 } |
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387 // method attributes |
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388 const char compile_type = is_osr_method ? '%' : ' '; |
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389 const char sync_char = is_synchronized ? 's' : ' '; |
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390 const char exception_char = has_exception_handler ? '!' : ' '; |
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391 const char blocking_char = is_blocking ? 'b' : ' '; |
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392 const char native_char = is_native ? 'n' : ' '; |
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393 |
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394 // print method attributes |
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395 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); |
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396 |
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397 if (TieredCompilation) { |
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398 if (comp_level != -1) st->print("%d ", comp_level); |
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399 else st->print("- "); |
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400 } |
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401 st->print(" "); // more indent |
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402 |
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403 if (method == NULL) { |
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404 st->print("(method)"); |
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405 } else { |
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406 method->print_short_name(st); |
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407 if (is_osr_method) { |
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408 st->print(" @ %d", osr_bci); |
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409 } |
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410 if (method->is_native()) |
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411 st->print(" (native)"); |
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412 else |
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413 st->print(" (%d bytes)", method->code_size()); |
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414 } |
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415 |
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416 if (msg != NULL) { |
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417 st->print(" %s", msg); |
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418 } |
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419 if (!short_form) { |
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420 st->cr(); |
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421 } |
0 | 422 } |
423 | |
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424 // ------------------------------------------------------------------ |
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425 // CompileTask::print_inlining |
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426 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { |
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427 // 1234567 |
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428 st->print(" "); // print timestamp |
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429 // 1234 |
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430 st->print(" "); // print compilation number |
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431 |
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432 // method attributes |
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433 if (method->is_loaded()) { |
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434 const char sync_char = method->is_synchronized() ? 's' : ' '; |
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435 const char exception_char = method->has_exception_handlers() ? '!' : ' '; |
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436 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; |
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437 |
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438 // print method attributes |
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439 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); |
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440 } else { |
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441 // %s!bn |
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442 st->print(" "); // print method attributes |
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443 } |
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444 |
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445 if (TieredCompilation) { |
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446 st->print(" "); |
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447 } |
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448 st->print(" "); // more indent |
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449 st->print(" "); // initial inlining indent |
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450 |
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451 for (int i = 0; i < inline_level; i++) st->print(" "); |
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452 |
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453 st->print("@ %d ", bci); // print bci |
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454 method->print_short_name(st); |
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455 if (method->is_loaded()) |
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456 st->print(" (%d bytes)", method->code_size()); |
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457 else |
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458 st->print(" (not loaded)"); |
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459 |
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460 if (msg != NULL) { |
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461 st->print(" %s", msg); |
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462 } |
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463 st->cr(); |
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464 } |
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465 |
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466 // ------------------------------------------------------------------ |
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467 // CompileTask::print_inline_indent |
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468 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { |
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469 // 1234567 |
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470 st->print(" "); // print timestamp |
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471 // 1234 |
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472 st->print(" "); // print compilation number |
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473 // %s!bn |
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474 st->print(" "); // print method attributes |
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475 if (TieredCompilation) { |
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476 st->print(" "); |
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477 } |
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478 st->print(" "); // more indent |
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479 st->print(" "); // initial inlining indent |
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480 for (int i = 0; i < inline_level; i++) st->print(" "); |
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481 } |
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482 |
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483 // ------------------------------------------------------------------ |
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484 // CompileTask::print_compilation |
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485 void CompileTask::print_compilation(outputStream* st, bool short_form) { |
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486 oop rem = JNIHandles::resolve(method_handle()); |
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487 assert(rem != NULL && rem->is_method(), "must be"); |
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488 methodOop method = (methodOop) rem; |
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489 bool is_osr_method = osr_bci() != InvocationEntryBci; |
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490 print_compilation_impl(st, method, compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), NULL, short_form); |
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491 } |
0 | 492 |
493 // ------------------------------------------------------------------ | |
494 // CompileTask::log_task | |
495 void CompileTask::log_task(xmlStream* log) { | |
496 Thread* thread = Thread::current(); | |
497 methodHandle method(thread, | |
498 (methodOop)JNIHandles::resolve(method_handle())); | |
499 ResourceMark rm(thread); | |
500 | |
501 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> | |
502 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); | |
503 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
504 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind | |
505 } // else compile_kind='c2c' | |
506 if (!method.is_null()) log->method(method); | |
507 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
508 log->print(" osr_bci='%d'", _osr_bci); | |
509 } | |
510 if (_comp_level != CompLevel_highest_tier) { | |
511 log->print(" level='%d'", _comp_level); | |
512 } | |
513 if (_is_blocking) { | |
514 log->print(" blocking='1'"); | |
515 } | |
516 log->stamp(); | |
517 } | |
518 | |
519 | |
520 // ------------------------------------------------------------------ | |
521 // CompileTask::log_task_queued | |
522 void CompileTask::log_task_queued() { | |
523 Thread* thread = Thread::current(); | |
524 ttyLocker ttyl; | |
525 ResourceMark rm(thread); | |
526 | |
527 xtty->begin_elem("task_queued"); | |
528 log_task(xtty); | |
529 if (_comment != NULL) { | |
530 xtty->print(" comment='%s'", _comment); | |
531 } | |
532 if (_hot_method != NULL) { | |
533 methodHandle hot(thread, | |
534 (methodOop)JNIHandles::resolve(_hot_method)); | |
535 methodHandle method(thread, | |
536 (methodOop)JNIHandles::resolve(_method)); | |
537 if (hot() != method()) { | |
538 xtty->method(hot); | |
539 } | |
540 } | |
541 if (_hot_count != 0) { | |
542 xtty->print(" hot_count='%d'", _hot_count); | |
543 } | |
544 xtty->end_elem(); | |
545 } | |
546 | |
547 | |
548 // ------------------------------------------------------------------ | |
549 // CompileTask::log_task_start | |
550 void CompileTask::log_task_start(CompileLog* log) { | |
551 log->begin_head("task"); | |
552 log_task(log); | |
553 log->end_head(); | |
554 } | |
555 | |
556 | |
557 // ------------------------------------------------------------------ | |
558 // CompileTask::log_task_done | |
559 void CompileTask::log_task_done(CompileLog* log) { | |
560 Thread* thread = Thread::current(); | |
561 methodHandle method(thread, | |
562 (methodOop)JNIHandles::resolve(method_handle())); | |
563 ResourceMark rm(thread); | |
564 | |
565 // <task_done ... stamp='1.234'> </task> | |
566 nmethod* nm = code(); | |
567 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", | |
1748 | 568 _is_success, nm == NULL ? 0 : nm->content_size(), |
0 | 569 method->invocation_count()); |
570 int bec = method->backedge_count(); | |
571 if (bec != 0) log->print(" backedge_count='%d'", bec); | |
572 // Note: "_is_complete" is about to be set, but is not. | |
573 if (_num_inlined_bytecodes != 0) { | |
574 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); | |
575 } | |
576 log->stamp(); | |
577 log->end_elem(); | |
578 log->tail("task"); | |
579 log->clear_identities(); // next task will have different CI | |
580 if (log->unflushed_count() > 2000) { | |
581 log->flush(); | |
582 } | |
583 log->mark_file_end(); | |
584 } | |
585 | |
586 | |
587 | |
588 // ------------------------------------------------------------------ | |
589 // CompileQueue::add | |
590 // | |
591 // Add a CompileTask to a CompileQueue | |
592 void CompileQueue::add(CompileTask* task) { | |
593 assert(lock()->owned_by_self(), "must own lock"); | |
594 | |
595 task->set_next(NULL); | |
1783 | 596 task->set_prev(NULL); |
0 | 597 |
598 if (_last == NULL) { | |
599 // The compile queue is empty. | |
600 assert(_first == NULL, "queue is empty"); | |
601 _first = task; | |
602 _last = task; | |
603 } else { | |
604 // Append the task to the queue. | |
605 assert(_last->next() == NULL, "not last"); | |
606 _last->set_next(task); | |
1783 | 607 task->set_prev(_last); |
0 | 608 _last = task; |
609 } | |
1783 | 610 ++_size; |
0 | 611 |
612 // Mark the method as being in the compile queue. | |
613 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); | |
614 | |
615 if (CIPrintCompileQueue) { | |
616 print(); | |
617 } | |
618 | |
619 if (LogCompilation && xtty != NULL) { | |
620 task->log_task_queued(); | |
621 } | |
622 | |
623 // Notify CompilerThreads that a task is available. | |
1783 | 624 lock()->notify_all(); |
0 | 625 } |
626 | |
627 // ------------------------------------------------------------------ | |
628 // CompileQueue::get | |
629 // | |
630 // Get the next CompileTask from a CompileQueue | |
631 CompileTask* CompileQueue::get() { | |
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632 NMethodSweeper::possibly_sweep(); |
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633 |
0 | 634 MutexLocker locker(lock()); |
635 // Wait for an available CompileTask. | |
636 while (_first == NULL) { | |
637 // There is no work to be done right now. Wait. | |
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638 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { |
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639 // During the emergency sweeping periods, wake up and sweep occasionally |
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640 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); |
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641 if (timedout) { |
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642 MutexUnlocker ul(lock()); |
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643 // When otherwise not busy, run nmethod sweeping |
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644 NMethodSweeper::possibly_sweep(); |
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645 } |
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646 } else { |
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647 // During normal operation no need to wake up on timer |
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648 lock()->wait(); |
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649 } |
0 | 650 } |
1783 | 651 CompileTask* task = CompilationPolicy::policy()->select_task(this); |
652 remove(task); | |
653 return task; | |
654 } | |
0 | 655 |
1783 | 656 void CompileQueue::remove(CompileTask* task) |
657 { | |
658 assert(lock()->owned_by_self(), "must own lock"); | |
659 if (task->prev() != NULL) { | |
660 task->prev()->set_next(task->next()); | |
661 } else { | |
662 // max is the first element | |
663 assert(task == _first, "Sanity"); | |
664 _first = task->next(); | |
0 | 665 } |
666 | |
1783 | 667 if (task->next() != NULL) { |
668 task->next()->set_prev(task->prev()); | |
669 } else { | |
670 // max is the last element | |
671 assert(task == _last, "Sanity"); | |
672 _last = task->prev(); | |
673 } | |
674 --_size; | |
0 | 675 } |
676 | |
677 // ------------------------------------------------------------------ | |
678 // CompileQueue::print | |
679 void CompileQueue::print() { | |
680 tty->print_cr("Contents of %s", name()); | |
681 tty->print_cr("----------------------"); | |
682 CompileTask* task = _first; | |
683 while (task != NULL) { | |
684 task->print_line(); | |
685 task = task->next(); | |
686 } | |
687 tty->print_cr("----------------------"); | |
688 } | |
689 | |
690 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { | |
691 | |
692 _current_method[0] = '\0'; | |
693 _compile_type = CompileBroker::no_compile; | |
694 | |
695 if (UsePerfData) { | |
696 ResourceMark rm; | |
697 | |
698 // create the thread instance name space string - don't create an | |
699 // instance subspace if instance is -1 - keeps the adapterThread | |
700 // counters from having a ".0" namespace. | |
701 const char* thread_i = (instance == -1) ? thread_name : | |
702 PerfDataManager::name_space(thread_name, instance); | |
703 | |
704 | |
705 char* name = PerfDataManager::counter_name(thread_i, "method"); | |
706 _perf_current_method = | |
707 PerfDataManager::create_string_variable(SUN_CI, name, | |
708 cmname_buffer_length, | |
709 _current_method, CHECK); | |
710 | |
711 name = PerfDataManager::counter_name(thread_i, "type"); | |
712 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, | |
713 PerfData::U_None, | |
714 (jlong)_compile_type, | |
715 CHECK); | |
716 | |
717 name = PerfDataManager::counter_name(thread_i, "time"); | |
718 _perf_time = PerfDataManager::create_counter(SUN_CI, name, | |
719 PerfData::U_Ticks, CHECK); | |
720 | |
721 name = PerfDataManager::counter_name(thread_i, "compiles"); | |
722 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, | |
723 PerfData::U_Events, CHECK); | |
724 } | |
725 } | |
726 | |
727 // ------------------------------------------------------------------ | |
728 // CompileBroker::compilation_init | |
729 // | |
730 // Initialize the Compilation object | |
731 void CompileBroker::compilation_init() { | |
732 _last_method_compiled[0] = '\0'; | |
733 | |
1970 | 734 #ifndef SHARK |
0 | 735 // Set the interface to the current compiler(s). |
1783 | 736 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); |
737 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); | |
0 | 738 #ifdef COMPILER1 |
1783 | 739 if (c1_count > 0) { |
740 _compilers[0] = new Compiler(); | |
741 } | |
0 | 742 #endif // COMPILER1 |
743 | |
744 #ifdef COMPILER2 | |
1783 | 745 if (c2_count > 0) { |
746 _compilers[1] = new C2Compiler(); | |
747 } | |
0 | 748 #endif // COMPILER2 |
749 | |
1970 | 750 #else // SHARK |
751 int c1_count = 0; | |
752 int c2_count = 1; | |
753 | |
754 _compilers[1] = new SharkCompiler(); | |
755 #endif // SHARK | |
1692 | 756 |
0 | 757 // Initialize the CompileTask free list |
758 _task_free_list = NULL; | |
759 | |
760 // Start the CompilerThreads | |
1783 | 761 init_compiler_threads(c1_count, c2_count); |
0 | 762 // totalTime performance counter is always created as it is required |
763 // by the implementation of java.lang.management.CompilationMBean. | |
764 { | |
765 EXCEPTION_MARK; | |
766 _perf_total_compilation = | |
767 PerfDataManager::create_counter(JAVA_CI, "totalTime", | |
768 PerfData::U_Ticks, CHECK); | |
769 } | |
770 | |
771 | |
772 if (UsePerfData) { | |
773 | |
774 EXCEPTION_MARK; | |
775 | |
776 // create the jvmstat performance counters | |
777 _perf_osr_compilation = | |
778 PerfDataManager::create_counter(SUN_CI, "osrTime", | |
779 PerfData::U_Ticks, CHECK); | |
780 | |
781 _perf_standard_compilation = | |
782 PerfDataManager::create_counter(SUN_CI, "standardTime", | |
783 PerfData::U_Ticks, CHECK); | |
784 | |
785 _perf_total_bailout_count = | |
786 PerfDataManager::create_counter(SUN_CI, "totalBailouts", | |
787 PerfData::U_Events, CHECK); | |
788 | |
789 _perf_total_invalidated_count = | |
790 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", | |
791 PerfData::U_Events, CHECK); | |
792 | |
793 _perf_total_compile_count = | |
794 PerfDataManager::create_counter(SUN_CI, "totalCompiles", | |
795 PerfData::U_Events, CHECK); | |
796 _perf_total_osr_compile_count = | |
797 PerfDataManager::create_counter(SUN_CI, "osrCompiles", | |
798 PerfData::U_Events, CHECK); | |
799 | |
800 _perf_total_standard_compile_count = | |
801 PerfDataManager::create_counter(SUN_CI, "standardCompiles", | |
802 PerfData::U_Events, CHECK); | |
803 | |
804 _perf_sum_osr_bytes_compiled = | |
805 PerfDataManager::create_counter(SUN_CI, "osrBytes", | |
806 PerfData::U_Bytes, CHECK); | |
807 | |
808 _perf_sum_standard_bytes_compiled = | |
809 PerfDataManager::create_counter(SUN_CI, "standardBytes", | |
810 PerfData::U_Bytes, CHECK); | |
811 | |
812 _perf_sum_nmethod_size = | |
813 PerfDataManager::create_counter(SUN_CI, "nmethodSize", | |
814 PerfData::U_Bytes, CHECK); | |
815 | |
816 _perf_sum_nmethod_code_size = | |
817 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", | |
818 PerfData::U_Bytes, CHECK); | |
819 | |
820 _perf_last_method = | |
821 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", | |
822 CompilerCounters::cmname_buffer_length, | |
823 "", CHECK); | |
824 | |
825 _perf_last_failed_method = | |
826 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", | |
827 CompilerCounters::cmname_buffer_length, | |
828 "", CHECK); | |
829 | |
830 _perf_last_invalidated_method = | |
831 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", | |
832 CompilerCounters::cmname_buffer_length, | |
833 "", CHECK); | |
834 | |
835 _perf_last_compile_type = | |
836 PerfDataManager::create_variable(SUN_CI, "lastType", | |
837 PerfData::U_None, | |
838 (jlong)CompileBroker::no_compile, | |
839 CHECK); | |
840 | |
841 _perf_last_compile_size = | |
842 PerfDataManager::create_variable(SUN_CI, "lastSize", | |
843 PerfData::U_Bytes, | |
844 (jlong)CompileBroker::no_compile, | |
845 CHECK); | |
846 | |
847 | |
848 _perf_last_failed_type = | |
849 PerfDataManager::create_variable(SUN_CI, "lastFailedType", | |
850 PerfData::U_None, | |
851 (jlong)CompileBroker::no_compile, | |
852 CHECK); | |
853 | |
854 _perf_last_invalidated_type = | |
855 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", | |
856 PerfData::U_None, | |
857 (jlong)CompileBroker::no_compile, | |
858 CHECK); | |
859 } | |
860 | |
861 _initialized = true; | |
862 } | |
863 | |
864 | |
865 | |
866 // ------------------------------------------------------------------ | |
867 // CompileBroker::make_compiler_thread | |
868 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { | |
869 CompilerThread* compiler_thread = NULL; | |
870 | |
871 klassOop k = | |
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872 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), |
0 | 873 true, CHECK_0); |
874 instanceKlassHandle klass (THREAD, k); | |
875 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); | |
876 Handle string = java_lang_String::create_from_str(name, CHECK_0); | |
877 | |
878 // Initialize thread_oop to put it into the system threadGroup | |
879 Handle thread_group (THREAD, Universe::system_thread_group()); | |
880 JavaValue result(T_VOID); | |
881 JavaCalls::call_special(&result, thread_oop, | |
882 klass, | |
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883 vmSymbols::object_initializer_name(), |
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884 vmSymbols::threadgroup_string_void_signature(), |
0 | 885 thread_group, |
886 string, | |
887 CHECK_0); | |
888 | |
889 { | |
890 MutexLocker mu(Threads_lock, THREAD); | |
891 compiler_thread = new CompilerThread(queue, counters); | |
892 // At this point the new CompilerThread data-races with this startup | |
893 // thread (which I believe is the primoridal thread and NOT the VM | |
894 // thread). This means Java bytecodes being executed at startup can | |
895 // queue compile jobs which will run at whatever default priority the | |
896 // newly created CompilerThread runs at. | |
897 | |
898 | |
899 // At this point it may be possible that no osthread was created for the | |
900 // JavaThread due to lack of memory. We would have to throw an exception | |
901 // in that case. However, since this must work and we do not allow | |
902 // exceptions anyway, check and abort if this fails. | |
903 | |
904 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ | |
905 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
906 "unable to create new native thread"); | |
907 } | |
908 | |
909 java_lang_Thread::set_thread(thread_oop(), compiler_thread); | |
910 | |
911 // Note that this only sets the JavaThread _priority field, which by | |
912 // definition is limited to Java priorities and not OS priorities. | |
913 // The os-priority is set in the CompilerThread startup code itself | |
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914 |
0 | 915 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); |
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916 |
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917 // Note that we cannot call os::set_priority because it expects Java |
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918 // priorities and we are *explicitly* using OS priorities so that it's |
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919 // possible to set the compiler thread priority higher than any Java |
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920 // thread. |
0 | 921 |
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922 int native_prio = CompilerThreadPriority; |
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923 if (native_prio == -1) { |
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924 if (UseCriticalCompilerThreadPriority) { |
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925 native_prio = os::java_to_os_priority[CriticalPriority]; |
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926 } else { |
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927 native_prio = os::java_to_os_priority[NearMaxPriority]; |
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928 } |
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929 } |
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930 os::set_native_priority(compiler_thread, native_prio); |
0 | 931 |
932 java_lang_Thread::set_daemon(thread_oop()); | |
933 | |
934 compiler_thread->set_threadObj(thread_oop()); | |
935 Threads::add(compiler_thread); | |
936 Thread::start(compiler_thread); | |
937 } | |
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938 |
0 | 939 // Let go of Threads_lock before yielding |
940 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) | |
941 | |
942 return compiler_thread; | |
943 } | |
944 | |
945 | |
946 // ------------------------------------------------------------------ | |
947 // CompileBroker::init_compiler_threads | |
948 // | |
949 // Initialize the compilation queue | |
1783 | 950 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { |
0 | 951 EXCEPTION_MARK; |
2447 | 952 #if !defined(ZERO) && !defined(SHARK) |
1783 | 953 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); |
2447 | 954 #endif // !ZERO && !SHARK |
1783 | 955 if (c2_compiler_count > 0) { |
956 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); | |
957 } | |
958 if (c1_compiler_count > 0) { | |
959 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); | |
960 } | |
0 | 961 |
1783 | 962 int compiler_count = c1_compiler_count + c2_compiler_count; |
963 | |
0 | 964 _method_threads = |
6197 | 965 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true); |
0 | 966 |
967 char name_buffer[256]; | |
1783 | 968 for (int i = 0; i < c2_compiler_count; i++) { |
0 | 969 // Create a name for our thread. |
1783 | 970 sprintf(name_buffer, "C2 CompilerThread%d", i); |
0 | 971 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); |
1783 | 972 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); |
0 | 973 _method_threads->append(new_thread); |
974 } | |
1783 | 975 |
976 for (int i = c2_compiler_count; i < compiler_count; i++) { | |
977 // Create a name for our thread. | |
978 sprintf(name_buffer, "C1 CompilerThread%d", i); | |
979 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); | |
980 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); | |
981 _method_threads->append(new_thread); | |
982 } | |
983 | |
0 | 984 if (UsePerfData) { |
985 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, | |
986 compiler_count, CHECK); | |
987 } | |
988 } | |
989 | |
990 // ------------------------------------------------------------------ | |
991 // CompileBroker::is_idle | |
992 bool CompileBroker::is_idle() { | |
1783 | 993 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { |
994 return false; | |
995 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { | |
0 | 996 return false; |
997 } else { | |
998 int num_threads = _method_threads->length(); | |
999 for (int i=0; i<num_threads; i++) { | |
1000 if (_method_threads->at(i)->task() != NULL) { | |
1001 return false; | |
1002 } | |
1003 } | |
1004 | |
1005 // No pending or active compilations. | |
1006 return true; | |
1007 } | |
1008 } | |
1009 | |
1010 | |
1011 // ------------------------------------------------------------------ | |
1012 // CompileBroker::compile_method | |
1013 // | |
1014 // Request compilation of a method. | |
1015 void CompileBroker::compile_method_base(methodHandle method, | |
1016 int osr_bci, | |
1017 int comp_level, | |
1018 methodHandle hot_method, | |
1019 int hot_count, | |
1020 const char* comment, | |
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1021 Thread* thread) { |
0 | 1022 // do nothing if compiler thread(s) is not available |
1023 if (!_initialized ) { | |
1024 return; | |
1025 } | |
1026 | |
1027 guarantee(!method->is_abstract(), "cannot compile abstract methods"); | |
1028 assert(method->method_holder()->klass_part()->oop_is_instance(), | |
1029 "sanity check"); | |
1030 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), | |
1031 "method holder must be initialized"); | |
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1032 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); |
0 | 1033 |
1034 if (CIPrintRequests) { | |
1035 tty->print("request: "); | |
1036 method->print_short_name(tty); | |
1037 if (osr_bci != InvocationEntryBci) { | |
1038 tty->print(" osr_bci: %d", osr_bci); | |
1039 } | |
1040 tty->print(" comment: %s count: %d", comment, hot_count); | |
1041 if (!hot_method.is_null()) { | |
1042 tty->print(" hot: "); | |
1043 if (hot_method() != method()) { | |
1044 hot_method->print_short_name(tty); | |
1045 } else { | |
1046 tty->print("yes"); | |
1047 } | |
1048 } | |
1049 tty->cr(); | |
1050 } | |
1051 | |
1052 // A request has been made for compilation. Before we do any | |
1053 // real work, check to see if the method has been compiled | |
1054 // in the meantime with a definitive result. | |
1055 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1056 return; | |
1057 } | |
1058 | |
2403 | 1059 #ifndef PRODUCT |
1060 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { | |
1061 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { | |
1062 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. | |
1063 return; | |
1064 } | |
1065 } | |
1066 #endif | |
1783 | 1067 |
0 | 1068 // If this method is already in the compile queue, then |
1069 // we do not block the current thread. | |
1070 if (compilation_is_in_queue(method, osr_bci)) { | |
1071 // We may want to decay our counter a bit here to prevent | |
1072 // multiple denied requests for compilation. This is an | |
1073 // open compilation policy issue. Note: The other possibility, | |
1074 // in the case that this is a blocking compile request, is to have | |
1075 // all subsequent blocking requesters wait for completion of | |
1076 // ongoing compiles. Note that in this case we'll need a protocol | |
1077 // for freeing the associated compile tasks. [Or we could have | |
1078 // a single static monitor on which all these waiters sleep.] | |
1079 return; | |
1080 } | |
1081 | |
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1082 // If the requesting thread is holding the pending list lock |
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1083 // then we just return. We can't risk blocking while holding |
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1084 // the pending list lock or a 3-way deadlock may occur |
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1085 // between the reference handler thread, a GC (instigated |
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1086 // by a compiler thread), and compiled method registration. |
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1087 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) { |
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1088 return; |
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1089 } |
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1090 |
0 | 1091 // Outputs from the following MutexLocker block: |
1092 CompileTask* task = NULL; | |
1093 bool blocking = false; | |
1783 | 1094 CompileQueue* queue = compile_queue(comp_level); |
0 | 1095 |
1096 // Acquire our lock. | |
1097 { | |
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1098 MutexLocker locker(queue->lock(), thread); |
0 | 1099 |
1100 // Make sure the method has not slipped into the queues since | |
1101 // last we checked; note that those checks were "fast bail-outs". | |
1102 // Here we need to be more careful, see 14012000 below. | |
1103 if (compilation_is_in_queue(method, osr_bci)) { | |
1104 return; | |
1105 } | |
1106 | |
1107 // We need to check again to see if the compilation has | |
1108 // completed. A previous compilation may have registered | |
1109 // some result. | |
1110 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1111 return; | |
1112 } | |
1113 | |
1114 // We now know that this compilation is not pending, complete, | |
1115 // or prohibited. Assign a compile_id to this compilation | |
1116 // and check to see if it is in our [Start..Stop) range. | |
1117 uint compile_id = assign_compile_id(method, osr_bci); | |
1118 if (compile_id == 0) { | |
1119 // The compilation falls outside the allowed range. | |
1120 return; | |
1121 } | |
1122 | |
1123 // Should this thread wait for completion of the compile? | |
1124 blocking = is_compile_blocking(method, osr_bci); | |
1125 | |
1126 // We will enter the compilation in the queue. | |
1127 // 14012000: Note that this sets the queued_for_compile bits in | |
1128 // the target method. We can now reason that a method cannot be | |
1129 // queued for compilation more than once, as follows: | |
1130 // Before a thread queues a task for compilation, it first acquires | |
1131 // the compile queue lock, then checks if the method's queued bits | |
1132 // are set or it has already been compiled. Thus there can not be two | |
1133 // instances of a compilation task for the same method on the | |
1134 // compilation queue. Consider now the case where the compilation | |
1135 // thread has already removed a task for that method from the queue | |
1136 // and is in the midst of compiling it. In this case, the | |
1137 // queued_for_compile bits must be set in the method (and these | |
1138 // will be visible to the current thread, since the bits were set | |
1139 // under protection of the compile queue lock, which we hold now. | |
1140 // When the compilation completes, the compiler thread first sets | |
1141 // the compilation result and then clears the queued_for_compile | |
1142 // bits. Neither of these actions are protected by a barrier (or done | |
1143 // under the protection of a lock), so the only guarantee we have | |
1144 // (on machines with TSO (Total Store Order)) is that these values | |
1145 // will update in that order. As a result, the only combinations of | |
1146 // these bits that the current thread will see are, in temporal order: | |
1147 // <RESULT, QUEUE> : | |
1148 // <0, 1> : in compile queue, but not yet compiled | |
1149 // <1, 1> : compiled but queue bit not cleared | |
1150 // <1, 0> : compiled and queue bit cleared | |
1151 // Because we first check the queue bits then check the result bits, | |
1152 // we are assured that we cannot introduce a duplicate task. | |
1153 // Note that if we did the tests in the reverse order (i.e. check | |
1154 // result then check queued bit), we could get the result bit before | |
1155 // the compilation completed, and the queue bit after the compilation | |
1156 // completed, and end up introducing a "duplicate" (redundant) task. | |
1157 // In that case, the compiler thread should first check if a method | |
1158 // has already been compiled before trying to compile it. | |
1159 // NOTE: in the event that there are multiple compiler threads and | |
1160 // there is de-optimization/recompilation, things will get hairy, | |
1161 // and in that case it's best to protect both the testing (here) of | |
1162 // these bits, and their updating (here and elsewhere) under a | |
1163 // common lock. | |
1783 | 1164 task = create_compile_task(queue, |
0 | 1165 compile_id, method, |
1166 osr_bci, comp_level, | |
1167 hot_method, hot_count, comment, | |
1168 blocking); | |
1169 } | |
1170 | |
1171 if (blocking) { | |
1172 wait_for_completion(task); | |
1173 } | |
1174 } | |
1175 | |
1176 | |
1177 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, | |
1783 | 1178 int comp_level, |
0 | 1179 methodHandle hot_method, int hot_count, |
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1180 const char* comment, Thread* THREAD) { |
0 | 1181 // make sure arguments make sense |
1182 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); | |
1183 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); | |
1184 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); | |
1185 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); | |
1186 | |
1783 | 1187 if (!TieredCompilation) { |
1188 comp_level = CompLevel_highest_tier; | |
0 | 1189 } |
1190 | |
1191 // return quickly if possible | |
1192 | |
1193 // lock, make sure that the compilation | |
1194 // isn't prohibited in a straightforward way. | |
1195 | |
1196 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { | |
1197 return NULL; | |
1198 } | |
1199 | |
1200 if (osr_bci == InvocationEntryBci) { | |
1201 // standard compilation | |
1202 nmethod* method_code = method->code(); | |
1783 | 1203 if (method_code != NULL) { |
1204 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1205 return method_code; | |
1206 } | |
0 | 1207 } |
1208 if (method->is_not_compilable(comp_level)) return NULL; | |
1202 | 1209 |
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1210 if (UseCodeCacheFlushing) { |
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1211 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); |
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1212 if (saved != NULL) { |
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1213 method->set_code(method, saved); |
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1214 return saved; |
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1215 } |
1202 | 1216 } |
1217 | |
0 | 1218 } else { |
1219 // osr compilation | |
1220 #ifndef TIERED | |
1221 // seems like an assert of dubious value | |
1783 | 1222 assert(comp_level == CompLevel_highest_tier, |
0 | 1223 "all OSR compiles are assumed to be at a single compilation lavel"); |
1224 #endif // TIERED | |
1783 | 1225 // We accept a higher level osr method |
1226 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1227 if (nm != NULL) return nm; |
1228 if (method->is_not_osr_compilable()) return NULL; | |
1229 } | |
1230 | |
1231 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); | |
1232 // some prerequisites that are compiler specific | |
2447 | 1233 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) { |
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1234 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); |
0 | 1235 // Resolve all classes seen in the signature of the method |
1236 // we are compiling. | |
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1237 methodOopDesc::load_signature_classes(method, CHECK_AND_CLEAR_NULL); |
0 | 1238 } |
1239 | |
1240 // If the method is native, do the lookup in the thread requesting | |
1241 // the compilation. Native lookups can load code, which is not | |
1242 // permitted during compilation. | |
1243 // | |
1244 // Note: A native method implies non-osr compilation which is | |
1245 // checked with an assertion at the entry of this method. | |
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1246 if (method->is_native() && !method->is_method_handle_intrinsic()) { |
0 | 1247 bool in_base_library; |
1248 address adr = NativeLookup::lookup(method, in_base_library, THREAD); | |
1249 if (HAS_PENDING_EXCEPTION) { | |
1250 // In case of an exception looking up the method, we just forget | |
1251 // about it. The interpreter will kick-in and throw the exception. | |
1252 method->set_not_compilable(); // implies is_not_osr_compilable() | |
1253 CLEAR_PENDING_EXCEPTION; | |
1254 return NULL; | |
1255 } | |
1256 assert(method->has_native_function(), "must have native code by now"); | |
1257 } | |
1258 | |
1259 // RedefineClasses() has replaced this method; just return | |
1260 if (method->is_old()) { | |
1261 return NULL; | |
1262 } | |
1263 | |
1264 // JVMTI -- post_compile_event requires jmethod_id() that may require | |
1265 // a lock the compiling thread can not acquire. Prefetch it here. | |
1266 if (JvmtiExport::should_post_compiled_method_load()) { | |
1267 method->jmethod_id(); | |
1268 } | |
1269 | |
1202 | 1270 // If the compiler is shut off due to code cache flushing or otherwise, |
1271 // fail out now so blocking compiles dont hang the java thread | |
1272 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { | |
1783 | 1273 CompilationPolicy::policy()->delay_compilation(method()); |
1202 | 1274 return NULL; |
1275 } | |
1276 | |
0 | 1277 // do the compilation |
1278 if (method->is_native()) { | |
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1279 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { |
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1280 // Acquire our lock. |
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1281 int compile_id; |
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1282 { |
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1283 MutexLocker locker(MethodCompileQueue_lock, THREAD); |
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1284 compile_id = assign_compile_id(method, standard_entry_bci); |
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1285 } |
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1286 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id); |
0 | 1287 } else { |
1288 return NULL; | |
1289 } | |
1290 } else { | |
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1291 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD); |
0 | 1292 } |
1293 | |
1294 // return requested nmethod | |
1783 | 1295 // We accept a higher level osr method |
1296 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1297 } |
1298 | |
1299 | |
1300 // ------------------------------------------------------------------ | |
1301 // CompileBroker::compilation_is_complete | |
1302 // | |
1303 // See if compilation of this method is already complete. | |
1304 bool CompileBroker::compilation_is_complete(methodHandle method, | |
1305 int osr_bci, | |
1306 int comp_level) { | |
1307 bool is_osr = (osr_bci != standard_entry_bci); | |
1308 if (is_osr) { | |
1309 if (method->is_not_osr_compilable()) { | |
1310 return true; | |
1311 } else { | |
1783 | 1312 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
0 | 1313 return (result != NULL); |
1314 } | |
1315 } else { | |
1316 if (method->is_not_compilable(comp_level)) { | |
1317 return true; | |
1318 } else { | |
1319 nmethod* result = method->code(); | |
1320 if (result == NULL) return false; | |
1783 | 1321 return comp_level == result->comp_level(); |
0 | 1322 } |
1323 } | |
1324 } | |
1325 | |
1326 | |
1327 // ------------------------------------------------------------------ | |
1328 // CompileBroker::compilation_is_in_queue | |
1329 // | |
1330 // See if this compilation is already requested. | |
1331 // | |
1332 // Implementation note: there is only a single "is in queue" bit | |
1333 // for each method. This means that the check below is overly | |
1334 // conservative in the sense that an osr compilation in the queue | |
1335 // will block a normal compilation from entering the queue (and vice | |
1336 // versa). This can be remedied by a full queue search to disambiguate | |
1337 // cases. If it is deemed profitible, this may be done. | |
1338 bool CompileBroker::compilation_is_in_queue(methodHandle method, | |
1783 | 1339 int osr_bci) { |
0 | 1340 return method->queued_for_compilation(); |
1341 } | |
1342 | |
1343 // ------------------------------------------------------------------ | |
1344 // CompileBroker::compilation_is_prohibited | |
1345 // | |
1346 // See if this compilation is not allowed. | |
1347 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { | |
1348 bool is_native = method->is_native(); | |
1349 // Some compilers may not support the compilation of natives. | |
1350 if (is_native && | |
1351 (!CICompileNatives || !compiler(comp_level)->supports_native())) { | |
1783 | 1352 method->set_not_compilable_quietly(comp_level); |
0 | 1353 return true; |
1354 } | |
1355 | |
1356 bool is_osr = (osr_bci != standard_entry_bci); | |
1357 // Some compilers may not support on stack replacement. | |
1358 if (is_osr && | |
1359 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { | |
1360 method->set_not_osr_compilable(); | |
1361 return true; | |
1362 } | |
1363 | |
1364 // The method may be explicitly excluded by the user. | |
1365 bool quietly; | |
1366 if (CompilerOracle::should_exclude(method, quietly)) { | |
1367 if (!quietly) { | |
1368 // This does not happen quietly... | |
1369 ResourceMark rm; | |
1370 tty->print("### Excluding %s:%s", | |
1371 method->is_native() ? "generation of native wrapper" : "compile", | |
1372 (method->is_static() ? " static" : "")); | |
1373 method->print_short_name(tty); | |
1374 tty->cr(); | |
1375 } | |
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1376 method->set_not_compilable_quietly(); |
0 | 1377 } |
1378 | |
1379 return false; | |
1380 } | |
1381 | |
1382 | |
1383 // ------------------------------------------------------------------ | |
1384 // CompileBroker::assign_compile_id | |
1385 // | |
1386 // Assign a serialized id number to this compilation request. If the | |
1387 // number falls out of the allowed range, return a 0. OSR | |
1388 // compilations may be numbered separately from regular compilations | |
1389 // if certain debugging flags are used. | |
1390 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { | |
1783 | 1391 assert(MethodCompileQueue_lock->owner() == Thread::current(), |
0 | 1392 "must hold the compilation queue lock"); |
1393 bool is_osr = (osr_bci != standard_entry_bci); | |
1394 uint id; | |
1395 if (CICountOSR && is_osr) { | |
1396 id = ++_osr_compilation_id; | |
1397 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { | |
1398 return id; | |
1399 } | |
1400 } else { | |
1401 id = ++_compilation_id; | |
1402 if ((uint)CIStart <= id && id < (uint)CIStop) { | |
1403 return id; | |
1404 } | |
1405 } | |
1406 | |
1407 // Method was not in the appropriate compilation range. | |
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1408 method->set_not_compilable_quietly(); |
0 | 1409 return 0; |
1410 } | |
1411 | |
1412 | |
1413 // ------------------------------------------------------------------ | |
1414 // CompileBroker::is_compile_blocking | |
1415 // | |
1416 // Should the current thread be blocked until this compilation request | |
1417 // has been fulfilled? | |
1418 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { | |
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1419 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); |
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1420 return !BackgroundCompilation; |
0 | 1421 } |
1422 | |
1423 | |
1424 // ------------------------------------------------------------------ | |
1425 // CompileBroker::preload_classes | |
1426 void CompileBroker::preload_classes(methodHandle method, TRAPS) { | |
1427 // Move this code over from c1_Compiler.cpp | |
1428 ShouldNotReachHere(); | |
1429 } | |
1430 | |
1431 | |
1432 // ------------------------------------------------------------------ | |
1433 // CompileBroker::create_compile_task | |
1434 // | |
1435 // Create a CompileTask object representing the current request for | |
1436 // compilation. Add this task to the queue. | |
1437 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, | |
1438 int compile_id, | |
1439 methodHandle method, | |
1440 int osr_bci, | |
1441 int comp_level, | |
1442 methodHandle hot_method, | |
1443 int hot_count, | |
1444 const char* comment, | |
1445 bool blocking) { | |
1446 CompileTask* new_task = allocate_task(); | |
1447 new_task->initialize(compile_id, method, osr_bci, comp_level, | |
1448 hot_method, hot_count, comment, | |
1449 blocking); | |
1450 queue->add(new_task); | |
1451 return new_task; | |
1452 } | |
1453 | |
1454 | |
1455 // ------------------------------------------------------------------ | |
1456 // CompileBroker::allocate_task | |
1457 // | |
1458 // Allocate a CompileTask, from the free list if possible. | |
1459 CompileTask* CompileBroker::allocate_task() { | |
1460 MutexLocker locker(CompileTaskAlloc_lock); | |
1461 CompileTask* task = NULL; | |
1462 if (_task_free_list != NULL) { | |
1463 task = _task_free_list; | |
1464 _task_free_list = task->next(); | |
1465 task->set_next(NULL); | |
1466 } else { | |
1467 task = new CompileTask(); | |
1468 task->set_next(NULL); | |
1469 } | |
1470 return task; | |
1471 } | |
1472 | |
1473 | |
1474 // ------------------------------------------------------------------ | |
1475 // CompileBroker::free_task | |
1476 // | |
1477 // Add a task to the free list. | |
1478 void CompileBroker::free_task(CompileTask* task) { | |
1479 MutexLocker locker(CompileTaskAlloc_lock); | |
1480 task->free(); | |
1481 task->set_next(_task_free_list); | |
1482 _task_free_list = task; | |
1483 } | |
1484 | |
1485 | |
1486 // ------------------------------------------------------------------ | |
1487 // CompileBroker::wait_for_completion | |
1488 // | |
1489 // Wait for the given method CompileTask to complete. | |
1490 void CompileBroker::wait_for_completion(CompileTask* task) { | |
1491 if (CIPrintCompileQueue) { | |
1492 tty->print_cr("BLOCKING FOR COMPILE"); | |
1493 } | |
1494 | |
1495 assert(task->is_blocking(), "can only wait on blocking task"); | |
1496 | |
1497 JavaThread *thread = JavaThread::current(); | |
1498 thread->set_blocked_on_compilation(true); | |
1499 | |
1500 methodHandle method(thread, | |
1501 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1502 { | |
1503 MutexLocker waiter(task->lock(), thread); | |
1504 | |
1505 while (!task->is_complete()) | |
1506 task->lock()->wait(); | |
1507 } | |
1508 // It is harmless to check this status without the lock, because | |
1509 // completion is a stable property (until the task object is recycled). | |
1510 assert(task->is_complete(), "Compilation should have completed"); | |
1511 assert(task->code_handle() == NULL, "must be reset"); | |
1512 | |
1513 thread->set_blocked_on_compilation(false); | |
1514 | |
1515 // By convention, the waiter is responsible for recycling a | |
1516 // blocking CompileTask. Since there is only one waiter ever | |
1517 // waiting on a CompileTask, we know that no one else will | |
1518 // be using this CompileTask; we can free it. | |
1519 free_task(task); | |
1520 } | |
1521 | |
1522 // ------------------------------------------------------------------ | |
1523 // CompileBroker::compiler_thread_loop | |
1524 // | |
1525 // The main loop run by a CompilerThread. | |
1526 void CompileBroker::compiler_thread_loop() { | |
1527 CompilerThread* thread = CompilerThread::current(); | |
1528 CompileQueue* queue = thread->queue(); | |
1529 | |
1530 // For the thread that initializes the ciObjectFactory | |
1531 // this resource mark holds all the shared objects | |
1532 ResourceMark rm; | |
1533 | |
1534 // First thread to get here will initialize the compiler interface | |
1535 | |
1536 if (!ciObjectFactory::is_initialized()) { | |
1537 ASSERT_IN_VM; | |
1538 MutexLocker only_one (CompileThread_lock, thread); | |
1539 if (!ciObjectFactory::is_initialized()) { | |
1540 ciObjectFactory::initialize(); | |
1541 } | |
1542 } | |
1543 | |
1544 // Open a log. | |
1545 if (LogCompilation) { | |
1546 init_compiler_thread_log(); | |
1547 } | |
1548 CompileLog* log = thread->log(); | |
1549 if (log != NULL) { | |
1550 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", | |
1551 os::current_thread_id(), | |
1552 os::current_process_id()); | |
1553 log->stamp(); | |
1554 log->end_elem(); | |
1555 } | |
1556 | |
1557 while (true) { | |
1558 { | |
1559 // We need this HandleMark to avoid leaking VM handles. | |
1560 HandleMark hm(thread); | |
1202 | 1561 |
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1562 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) { |
1202 | 1563 // the code cache is really full |
1564 handle_full_code_cache(); | |
1565 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { | |
1566 // Attempt to start cleaning the code cache while there is still a little headroom | |
1567 NMethodSweeper::handle_full_code_cache(false); | |
0 | 1568 } |
1569 | |
1570 CompileTask* task = queue->get(); | |
1571 | |
1572 // Give compiler threads an extra quanta. They tend to be bursty and | |
1573 // this helps the compiler to finish up the job. | |
1574 if( CompilerThreadHintNoPreempt ) | |
1575 os::hint_no_preempt(); | |
1576 | |
1577 // trace per thread time and compile statistics | |
1578 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); | |
1579 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); | |
1580 | |
1581 // Assign the task to the current thread. Mark this compilation | |
1582 // thread as active for the profiler. | |
1583 CompileTaskWrapper ctw(task); | |
1584 nmethodLocker result_handle; // (handle for the nmethod produced by this task) | |
1585 task->set_code_handle(&result_handle); | |
1586 methodHandle method(thread, | |
1587 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1588 | |
1589 // Never compile a method if breakpoints are present in it | |
1590 if (method()->number_of_breakpoints() == 0) { | |
1591 // Compile the method. | |
1202 | 1592 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
0 | 1593 #ifdef COMPILER1 |
1594 // Allow repeating compilations for the purpose of benchmarking | |
1595 // compile speed. This is not useful for customers. | |
1596 if (CompilationRepeat != 0) { | |
1597 int compile_count = CompilationRepeat; | |
1598 while (compile_count > 0) { | |
1599 invoke_compiler_on_method(task); | |
1600 nmethod* nm = method->code(); | |
1601 if (nm != NULL) { | |
1602 nm->make_zombie(); | |
1603 method->clear_code(); | |
1604 } | |
1605 compile_count--; | |
1606 } | |
1607 } | |
1608 #endif /* COMPILER1 */ | |
1609 invoke_compiler_on_method(task); | |
1610 } else { | |
1611 // After compilation is disabled, remove remaining methods from queue | |
1612 method->clear_queued_for_compilation(); | |
1613 } | |
1614 } | |
1615 } | |
1616 } | |
1617 } | |
1618 | |
1619 | |
1620 // ------------------------------------------------------------------ | |
1621 // CompileBroker::init_compiler_thread_log | |
1622 // | |
1623 // Set up state required by +LogCompilation. | |
1624 void CompileBroker::init_compiler_thread_log() { | |
1625 CompilerThread* thread = CompilerThread::current(); | |
1626 char fileBuf[4*K]; | |
1627 FILE* fp = NULL; | |
1628 char* file = NULL; | |
1629 intx thread_id = os::current_thread_id(); | |
1630 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { | |
1631 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); | |
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1632 if (dir == NULL) { |
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1633 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", |
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1634 thread_id, os::current_process_id()); |
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1635 } else { |
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1636 jio_snprintf(fileBuf, sizeof(fileBuf), |
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1637 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
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1638 os::file_separator(), thread_id, os::current_process_id()); |
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1639 } |
0 | 1640 fp = fopen(fileBuf, "at"); |
1641 if (fp != NULL) { | |
6197 | 1642 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1, mtCompiler); |
0 | 1643 strcpy(file, fileBuf); |
1644 break; | |
1645 } | |
1646 } | |
1647 if (fp == NULL) { | |
1648 warning("Cannot open log file: %s", fileBuf); | |
1649 } else { | |
1650 if (LogCompilation && Verbose) | |
1651 tty->print_cr("Opening compilation log %s", file); | |
6197 | 1652 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file, fp, thread_id); |
0 | 1653 thread->init_log(log); |
1654 | |
1655 if (xtty != NULL) { | |
1656 ttyLocker ttyl; | |
1657 | |
1658 // Record any per thread log files | |
1659 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); | |
1660 } | |
1661 } | |
1662 } | |
1663 | |
1664 // ------------------------------------------------------------------ | |
1665 // CompileBroker::set_should_block | |
1666 // | |
1667 // Set _should_block. | |
1668 // Call this from the VM, with Threads_lock held and a safepoint requested. | |
1669 void CompileBroker::set_should_block() { | |
1670 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
1671 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); | |
1672 #ifndef PRODUCT | |
1673 if (PrintCompilation && (Verbose || WizardMode)) | |
1674 tty->print_cr("notifying compiler thread pool to block"); | |
1675 #endif | |
1676 _should_block = true; | |
1677 } | |
1678 | |
1679 // ------------------------------------------------------------------ | |
1680 // CompileBroker::maybe_block | |
1681 // | |
1682 // Call this from the compiler at convenient points, to poll for _should_block. | |
1683 void CompileBroker::maybe_block() { | |
1684 if (_should_block) { | |
1685 #ifndef PRODUCT | |
1686 if (PrintCompilation && (Verbose || WizardMode)) | |
1687 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); | |
1688 #endif | |
1689 ThreadInVMfromNative tivfn(JavaThread::current()); | |
1690 } | |
1691 } | |
1692 | |
1693 | |
1694 // ------------------------------------------------------------------ | |
1695 // CompileBroker::invoke_compiler_on_method | |
1696 // | |
1697 // Compile a method. | |
1698 // | |
1699 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { | |
1700 if (PrintCompilation) { | |
1701 ResourceMark rm; | |
1702 task->print_line(); | |
1703 } | |
1704 elapsedTimer time; | |
1705 | |
1706 CompilerThread* thread = CompilerThread::current(); | |
1707 ResourceMark rm(thread); | |
1708 | |
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1709 if (LogEvents) { |
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1710 _compilation_log->log_compile(thread, task); |
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1711 } |
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1712 |
0 | 1713 // Common flags. |
1714 uint compile_id = task->compile_id(); | |
1715 int osr_bci = task->osr_bci(); | |
1716 bool is_osr = (osr_bci != standard_entry_bci); | |
1717 bool should_log = (thread->log() != NULL); | |
1718 bool should_break = false; | |
1719 { | |
1720 // create the handle inside it's own block so it can't | |
1721 // accidentally be referenced once the thread transitions to | |
1722 // native. The NoHandleMark before the transition should catch | |
1723 // any cases where this occurs in the future. | |
1724 methodHandle method(thread, | |
1725 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1726 should_break = check_break_at(method, compile_id, is_osr); | |
1727 if (should_log && !CompilerOracle::should_log(method)) { | |
1728 should_log = false; | |
1729 } | |
1730 assert(!method->is_native(), "no longer compile natives"); | |
1731 | |
1732 // Save information about this method in case of failure. | |
1733 set_last_compile(thread, method, is_osr, task->comp_level()); | |
1734 | |
1735 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); | |
1736 } | |
1737 | |
1738 // Allocate a new set of JNI handles. | |
1739 push_jni_handle_block(); | |
1740 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); | |
1741 int compilable = ciEnv::MethodCompilable; | |
1742 { | |
1743 int system_dictionary_modification_counter; | |
1744 { | |
1745 MutexLocker locker(Compile_lock, thread); | |
1746 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); | |
1747 } | |
1748 | |
1749 NoHandleMark nhm; | |
1750 ThreadToNativeFromVM ttn(thread); | |
1751 | |
1752 ciEnv ci_env(task, system_dictionary_modification_counter); | |
1753 if (should_break) { | |
1754 ci_env.set_break_at_compile(true); | |
1755 } | |
1756 if (should_log) { | |
1757 ci_env.set_log(thread->log()); | |
1758 } | |
1759 assert(thread->env() == &ci_env, "set by ci_env"); | |
1760 // The thread-env() field is cleared in ~CompileTaskWrapper. | |
1761 | |
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1762 // Cache Jvmti state |
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1763 ci_env.cache_jvmti_state(); |
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1764 |
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1765 // Cache DTrace flags |
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1766 ci_env.cache_dtrace_flags(); |
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1767 |
0 | 1768 ciMethod* target = ci_env.get_method_from_handle(target_handle); |
1769 | |
1770 TraceTime t1("compilation", &time); | |
1771 | |
1772 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); | |
1773 | |
1774 if (!ci_env.failing() && task->code() == NULL) { | |
1775 //assert(false, "compiler should always document failure"); | |
1776 // The compiler elected, without comment, not to register a result. | |
1777 // Do not attempt further compilations of this method. | |
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1778 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); |
0 | 1779 } |
1780 | |
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1781 // Copy this bit to the enclosing block: |
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1782 compilable = ci_env.compilable(); |
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1783 |
0 | 1784 if (ci_env.failing()) { |
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1785 const char* retry_message = ci_env.retry_message(); |
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1786 if (_compilation_log != NULL) { |
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1787 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message); |
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1788 } |
0 | 1789 if (PrintCompilation) { |
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1790 tty->print("%4d COMPILE SKIPPED: %s", compile_id, ci_env.failure_reason()); |
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1791 if (retry_message != NULL) { |
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1792 tty->print(" (%s)", retry_message); |
0 | 1793 } |
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1794 tty->cr(); |
0 | 1795 } |
1796 } else { | |
1797 task->mark_success(); | |
1798 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); | |
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1799 if (_compilation_log != NULL) { |
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1800 nmethod* code = task->code(); |
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1801 if (code != NULL) { |
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1802 _compilation_log->log_nmethod(thread, code); |
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1803 } |
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1804 } |
0 | 1805 } |
1806 } | |
1807 pop_jni_handle_block(); | |
1808 | |
1809 methodHandle method(thread, | |
1810 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1811 | |
1812 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); | |
1813 | |
1814 collect_statistics(thread, time, task); | |
1815 | |
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1816 if (PrintCompilation && PrintCompilation2) { |
4047 | 1817 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp |
1818 tty->print("%4d ", compile_id); // print compilation number | |
1819 tty->print("%s ", (is_osr ? "%" : " ")); | |
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1820 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size(); |
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1821 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes()); |
4047 | 1822 } |
1823 | |
0 | 1824 if (compilable == ciEnv::MethodCompilable_never) { |
1825 if (is_osr) { | |
1826 method->set_not_osr_compilable(); | |
1827 } else { | |
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1828 method->set_not_compilable_quietly(); |
0 | 1829 } |
1830 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
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1831 method->set_not_compilable_quietly(task->comp_level()); |
0 | 1832 } |
1833 | |
1834 // Note that the queued_for_compilation bits are cleared without | |
1835 // protection of a mutex. [They were set by the requester thread, | |
1836 // when adding the task to the complie queue -- at which time the | |
1837 // compile queue lock was held. Subsequently, we acquired the compile | |
1838 // queue lock to get this task off the compile queue; thus (to belabour | |
1839 // the point somewhat) our clearing of the bits must be occurring | |
1840 // only after the setting of the bits. See also 14012000 above. | |
1841 method->clear_queued_for_compilation(); | |
1842 | |
1843 #ifdef ASSERT | |
1844 if (CollectedHeap::fired_fake_oom()) { | |
1845 // The current compile received a fake OOM during compilation so | |
1846 // go ahead and exit the VM since the test apparently succeeded | |
1847 tty->print_cr("*** Shutting down VM after successful fake OOM"); | |
1848 vm_exit(0); | |
1849 } | |
1850 #endif | |
1851 } | |
1852 | |
1853 // ------------------------------------------------------------------ | |
1202 | 1854 // CompileBroker::handle_full_code_cache |
1855 // | |
1856 // The CodeCache is full. Print out warning and disable compilation or | |
1857 // try code cache cleaning so compilation can continue later. | |
1858 void CompileBroker::handle_full_code_cache() { | |
1859 UseInterpreter = true; | |
1860 if (UseCompiler || AlwaysCompileLoopMethods ) { | |
1728
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1861 if (xtty != NULL) { |
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1862 stringStream s; |
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1863 // Dump code cache state into a buffer before locking the tty, |
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1864 // because log_state() will use locks causing lock conflicts. |
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1865 CodeCache::log_state(&s); |
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1866 // Lock to prevent tearing |
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1867 ttyLocker ttyl; |
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1868 xtty->begin_elem("code_cache_full"); |
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1869 xtty->print(s.as_string()); |
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1870 xtty->stamp(); |
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1871 xtty->end_elem(); |
1202 | 1872 } |
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1873 warning("CodeCache is full. Compiler has been disabled."); |
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1874 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); |
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1875 CodeCache::print_bounds(tty); |
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1876 #ifndef PRODUCT |
1202 | 1877 if (CompileTheWorld || ExitOnFullCodeCache) { |
1878 before_exit(JavaThread::current()); | |
1879 exit_globals(); // will delete tty | |
1880 vm_direct_exit(CompileTheWorld ? 0 : 1); | |
1881 } | |
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1882 #endif |
1202 | 1883 if (UseCodeCacheFlushing) { |
1884 NMethodSweeper::handle_full_code_cache(true); | |
1885 } else { | |
1886 UseCompiler = false; | |
1887 AlwaysCompileLoopMethods = false; | |
1888 } | |
1889 } | |
1890 } | |
1891 | |
1892 // ------------------------------------------------------------------ | |
0 | 1893 // CompileBroker::set_last_compile |
1894 // | |
1895 // Record this compilation for debugging purposes. | |
1896 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { | |
1897 ResourceMark rm; | |
1898 char* method_name = method->name()->as_C_string(); | |
1899 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); | |
1900 char current_method[CompilerCounters::cmname_buffer_length]; | |
1901 size_t maxLen = CompilerCounters::cmname_buffer_length; | |
1902 | |
1903 if (UsePerfData) { | |
1904 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); | |
1905 | |
1906 size_t s1len = strlen(class_name); | |
1907 size_t s2len = strlen(method_name); | |
1908 | |
1909 // check if we need to truncate the string | |
1910 if (s1len + s2len + 2 > maxLen) { | |
1911 | |
1912 // the strategy is to lop off the leading characters of the | |
1913 // class name and the trailing characters of the method name. | |
1914 | |
1915 if (s2len + 2 > maxLen) { | |
1916 // lop of the entire class name string, let snprintf handle | |
1917 // truncation of the method name. | |
1918 class_name += s1len; // null string | |
1919 } | |
1920 else { | |
1921 // lop off the extra characters from the front of the class name | |
1922 class_name += ((s1len + s2len + 2) - maxLen); | |
1923 } | |
1924 } | |
1925 | |
1926 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); | |
1927 } | |
1928 | |
1929 if (CICountOSR && is_osr) { | |
1930 _last_compile_type = osr_compile; | |
1931 } else { | |
1932 _last_compile_type = normal_compile; | |
1933 } | |
1934 _last_compile_level = comp_level; | |
1935 | |
1936 if (UsePerfData) { | |
1937 CompilerCounters* counters = thread->counters(); | |
1938 counters->set_current_method(current_method); | |
1939 counters->set_compile_type((jlong)_last_compile_type); | |
1940 } | |
1941 } | |
1942 | |
1943 | |
1944 // ------------------------------------------------------------------ | |
1945 // CompileBroker::push_jni_handle_block | |
1946 // | |
1947 // Push on a new block of JNI handles. | |
1948 void CompileBroker::push_jni_handle_block() { | |
1949 JavaThread* thread = JavaThread::current(); | |
1950 | |
1951 // Allocate a new block for JNI handles. | |
1952 // Inlined code from jni_PushLocalFrame() | |
1953 JNIHandleBlock* java_handles = thread->active_handles(); | |
1954 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); | |
1955 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); | |
1956 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. | |
1957 thread->set_active_handles(compile_handles); | |
1958 } | |
1959 | |
1960 | |
1961 // ------------------------------------------------------------------ | |
1962 // CompileBroker::pop_jni_handle_block | |
1963 // | |
1964 // Pop off the current block of JNI handles. | |
1965 void CompileBroker::pop_jni_handle_block() { | |
1966 JavaThread* thread = JavaThread::current(); | |
1967 | |
1968 // Release our JNI handle block | |
1969 JNIHandleBlock* compile_handles = thread->active_handles(); | |
1970 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); | |
1971 thread->set_active_handles(java_handles); | |
1972 compile_handles->set_pop_frame_link(NULL); | |
1973 JNIHandleBlock::release_block(compile_handles, thread); // may block | |
1974 } | |
1975 | |
1976 | |
1977 // ------------------------------------------------------------------ | |
1978 // CompileBroker::check_break_at | |
1979 // | |
1980 // Should the compilation break at the current compilation. | |
1981 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { | |
1982 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { | |
1983 return true; | |
1984 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling | |
1985 return true; | |
1986 } else { | |
1987 return (compile_id == CIBreakAt); | |
1988 } | |
1989 } | |
1990 | |
1991 // ------------------------------------------------------------------ | |
1992 // CompileBroker::collect_statistics | |
1993 // | |
1994 // Collect statistics about the compilation. | |
1995 | |
1996 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { | |
1997 bool success = task->is_success(); | |
1998 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); | |
1999 uint compile_id = task->compile_id(); | |
2000 bool is_osr = (task->osr_bci() != standard_entry_bci); | |
2001 nmethod* code = task->code(); | |
2002 CompilerCounters* counters = thread->counters(); | |
2003 | |
2004 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); | |
2005 MutexLocker locker(CompileStatistics_lock); | |
2006 | |
2007 // _perf variables are production performance counters which are | |
2008 // updated regardless of the setting of the CITime and CITimeEach flags | |
2009 // | |
2010 if (!success) { | |
2011 _total_bailout_count++; | |
2012 if (UsePerfData) { | |
2013 _perf_last_failed_method->set_value(counters->current_method()); | |
2014 _perf_last_failed_type->set_value(counters->compile_type()); | |
2015 _perf_total_bailout_count->inc(); | |
2016 } | |
2017 } else if (code == NULL) { | |
2018 if (UsePerfData) { | |
2019 _perf_last_invalidated_method->set_value(counters->current_method()); | |
2020 _perf_last_invalidated_type->set_value(counters->compile_type()); | |
2021 _perf_total_invalidated_count->inc(); | |
2022 } | |
2023 _total_invalidated_count++; | |
2024 } else { | |
2025 // Compilation succeeded | |
2026 | |
2027 // update compilation ticks - used by the implementation of | |
2028 // java.lang.management.CompilationMBean | |
2029 _perf_total_compilation->inc(time.ticks()); | |
2030 | |
2031 if (CITime) { | |
2032 _t_total_compilation.add(time); | |
2033 if (is_osr) { | |
2034 _t_osr_compilation.add(time); | |
2035 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
2036 } else { | |
2037 _t_standard_compilation.add(time); | |
2038 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
2039 } | |
2040 } | |
2041 | |
2042 if (UsePerfData) { | |
2043 // save the name of the last method compiled | |
2044 _perf_last_method->set_value(counters->current_method()); | |
2045 _perf_last_compile_type->set_value(counters->compile_type()); | |
2046 _perf_last_compile_size->set_value(method->code_size() + | |
2047 task->num_inlined_bytecodes()); | |
2048 if (is_osr) { | |
2049 _perf_osr_compilation->inc(time.ticks()); | |
2050 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
2051 } else { | |
2052 _perf_standard_compilation->inc(time.ticks()); | |
2053 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
2054 } | |
2055 } | |
2056 | |
2057 if (CITimeEach) { | |
2058 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); | |
2059 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", | |
2060 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); | |
2061 } | |
2062 | |
2063 // Collect counts of successful compilations | |
1748 | 2064 _sum_nmethod_size += code->total_size(); |
2065 _sum_nmethod_code_size += code->insts_size(); | |
0 | 2066 _total_compile_count++; |
2067 | |
2068 if (UsePerfData) { | |
1748 | 2069 _perf_sum_nmethod_size->inc( code->total_size()); |
2070 _perf_sum_nmethod_code_size->inc(code->insts_size()); | |
0 | 2071 _perf_total_compile_count->inc(); |
2072 } | |
2073 | |
2074 if (is_osr) { | |
2075 if (UsePerfData) _perf_total_osr_compile_count->inc(); | |
2076 _total_osr_compile_count++; | |
2077 } else { | |
2078 if (UsePerfData) _perf_total_standard_compile_count->inc(); | |
2079 _total_standard_compile_count++; | |
2080 } | |
2081 } | |
2082 // set the current method for the thread to null | |
2083 if (UsePerfData) counters->set_current_method(""); | |
2084 } | |
2085 | |
2086 | |
2087 | |
2088 void CompileBroker::print_times() { | |
2089 tty->cr(); | |
2090 tty->print_cr("Accumulated compiler times (for compiled methods only)"); | |
2091 tty->print_cr("------------------------------------------------"); | |
2092 //0000000000111111111122222222223333333333444444444455555555556666666666 | |
2093 //0123456789012345678901234567890123456789012345678901234567890123456789 | |
2094 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); | |
2095 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", | |
2096 CompileBroker::_t_standard_compilation.seconds(), | |
2097 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); | |
2098 tty->print_cr(" On stack replacement : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count); | |
1131 | 2099 |
1783 | 2100 if (compiler(CompLevel_simple) != NULL) { |
2101 compiler(CompLevel_simple)->print_timers(); | |
0 | 2102 } |
1783 | 2103 if (compiler(CompLevel_full_optimization) != NULL) { |
2104 compiler(CompLevel_full_optimization)->print_timers(); | |
2105 } | |
0 | 2106 tty->cr(); |
2107 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; | |
2108 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); | |
2109 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); | |
2110 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); | |
2111 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); | |
2112 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); | |
2113 tty->cr(); | |
2114 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); | |
2115 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); | |
2116 } | |
2117 | |
2118 | |
2119 // Debugging output for failure | |
2120 void CompileBroker::print_last_compile() { | |
2121 if ( _last_compile_level != CompLevel_none && | |
2122 compiler(_last_compile_level) != NULL && | |
2123 _last_method_compiled != NULL && | |
2124 _last_compile_type != no_compile) { | |
2125 if (_last_compile_type == osr_compile) { | |
2126 tty->print_cr("Last parse: [osr]%d+++(%d) %s", | |
2127 _osr_compilation_id, _last_compile_level, _last_method_compiled); | |
2128 } else { | |
2129 tty->print_cr("Last parse: %d+++(%d) %s", | |
2130 _compilation_id, _last_compile_level, _last_method_compiled); | |
2131 } | |
2132 } | |
2133 } | |
2134 | |
2135 | |
2136 void CompileBroker::print_compiler_threads_on(outputStream* st) { | |
2137 #ifndef PRODUCT | |
2138 st->print_cr("Compiler thread printing unimplemented."); | |
2139 st->cr(); | |
2140 #endif | |
2141 } |