Mercurial > hg > graal-compiler
annotate src/share/vm/compiler/compileBroker.cpp @ 4911:d903bf750e9f
7129514: time warp warnings after 7117303
Summary: Replace calls to os::javaTimeMillis() that are used to update the milliseconds since the last GC to an equivalent that uses a monotonically non-decreasing time source.
Reviewed-by: ysr, jmasa
author | johnc |
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date | Wed, 18 Jan 2012 09:50:16 -0800 |
parents | 379b22e03c32 |
children | 09d00c18e323 |
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) { |
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207 log(thread, "nmethod " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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208 nm, nm->code_begin(), nm->code_end()); |
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209 } |
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210 |
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211 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { |
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212 StringLogMessage lm; |
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213 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); |
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214 if (retry_message != NULL) { |
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215 lm.append(" (%s)", retry_message); |
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216 } |
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217 lm.print("\n"); |
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218 log(thread, "%s", (const char*)lm); |
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219 } |
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220 }; |
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221 |
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222 static CompilationLog* _compilation_log = NULL; |
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223 |
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224 void compileBroker_init() { |
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225 if (LogEvents) { |
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226 _compilation_log = new CompilationLog(); |
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227 } |
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228 } |
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229 |
0 | 230 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { |
231 CompilerThread* thread = CompilerThread::current(); | |
232 thread->set_task(task); | |
233 CompileLog* log = thread->log(); | |
234 if (log != NULL) task->log_task_start(log); | |
235 } | |
236 | |
237 CompileTaskWrapper::~CompileTaskWrapper() { | |
238 CompilerThread* thread = CompilerThread::current(); | |
239 CompileTask* task = thread->task(); | |
240 CompileLog* log = thread->log(); | |
241 if (log != NULL) task->log_task_done(log); | |
242 thread->set_task(NULL); | |
243 task->set_code_handle(NULL); | |
244 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress)); | |
245 if (task->is_blocking()) { | |
246 MutexLocker notifier(task->lock(), thread); | |
247 task->mark_complete(); | |
248 // Notify the waiting thread that the compilation has completed. | |
249 task->lock()->notify_all(); | |
250 } else { | |
251 task->mark_complete(); | |
252 | |
253 // By convention, the compiling thread is responsible for | |
254 // recycling a non-blocking CompileTask. | |
255 CompileBroker::free_task(task); | |
256 } | |
257 } | |
258 | |
259 | |
260 // ------------------------------------------------------------------ | |
261 // CompileTask::initialize | |
262 void CompileTask::initialize(int compile_id, | |
263 methodHandle method, | |
264 int osr_bci, | |
265 int comp_level, | |
266 methodHandle hot_method, | |
267 int hot_count, | |
268 const char* comment, | |
269 bool is_blocking) { | |
270 assert(!_lock->is_locked(), "bad locking"); | |
271 | |
272 _compile_id = compile_id; | |
273 _method = JNIHandles::make_global(method); | |
274 _osr_bci = osr_bci; | |
275 _is_blocking = is_blocking; | |
276 _comp_level = comp_level; | |
277 _num_inlined_bytecodes = 0; | |
278 | |
279 _is_complete = false; | |
280 _is_success = false; | |
281 _code_handle = NULL; | |
282 | |
283 _hot_method = NULL; | |
284 _hot_count = hot_count; | |
285 _time_queued = 0; // tidy | |
286 _comment = comment; | |
287 | |
288 if (LogCompilation) { | |
289 _time_queued = os::elapsed_counter(); | |
290 if (hot_method.not_null()) { | |
291 if (hot_method == method) { | |
292 _hot_method = _method; | |
293 } else { | |
294 _hot_method = JNIHandles::make_global(hot_method); | |
295 } | |
296 } | |
297 } | |
298 | |
299 _next = NULL; | |
300 } | |
301 | |
302 // ------------------------------------------------------------------ | |
303 // CompileTask::code/set_code | |
304 nmethod* CompileTask::code() const { | |
305 if (_code_handle == NULL) return NULL; | |
306 return _code_handle->code(); | |
307 } | |
308 void CompileTask::set_code(nmethod* nm) { | |
309 if (_code_handle == NULL && nm == NULL) return; | |
310 guarantee(_code_handle != NULL, ""); | |
311 _code_handle->set_code(nm); | |
312 if (nm == NULL) _code_handle = NULL; // drop the handle also | |
313 } | |
314 | |
315 // ------------------------------------------------------------------ | |
316 // CompileTask::free | |
317 void CompileTask::free() { | |
318 set_code(NULL); | |
319 assert(!_lock->is_locked(), "Should not be locked when freed"); | |
320 if (_hot_method != NULL && _hot_method != _method) { | |
321 JNIHandles::destroy_global(_hot_method); | |
322 } | |
323 JNIHandles::destroy_global(_method); | |
324 } | |
325 | |
326 | |
327 // ------------------------------------------------------------------ | |
328 // CompileTask::print | |
329 void CompileTask::print() { | |
330 tty->print("<CompileTask compile_id=%d ", _compile_id); | |
331 tty->print("method="); | |
332 ((methodOop)JNIHandles::resolve(_method))->print_name(tty); | |
333 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", | |
334 _osr_bci, bool_to_str(_is_blocking), | |
335 bool_to_str(_is_complete), bool_to_str(_is_success)); | |
336 } | |
337 | |
1783 | 338 |
0 | 339 // ------------------------------------------------------------------ |
340 // CompileTask::print_line_on_error | |
341 // | |
342 // This function is called by fatal error handler when the thread | |
343 // causing troubles is a compiler thread. | |
344 // | |
345 // Do not grab any lock, do not allocate memory. | |
346 // | |
347 // Otherwise it's the same as CompileTask::print_line() | |
348 // | |
349 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { | |
350 // print compiler name | |
351 st->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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352 print_compilation(st); |
0 | 353 } |
354 | |
355 // ------------------------------------------------------------------ | |
356 // CompileTask::print_line | |
357 void CompileTask::print_line() { | |
358 ttyLocker ttyl; // keep the following output all in one block | |
359 // print compiler name if requested | |
360 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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361 print_compilation(); |
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362 } |
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363 |
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364 |
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365 // ------------------------------------------------------------------ |
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366 // CompileTask::print_compilation_impl |
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367 void CompileTask::print_compilation_impl(outputStream* st, methodOop method, int compile_id, int comp_level, |
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368 bool is_osr_method, int osr_bci, bool is_blocking, |
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369 const char* msg, bool short_form) { |
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370 if (!short_form) { |
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371 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp |
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372 } |
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373 st->print("%4d ", compile_id); // print compilation number |
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374 |
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375 // For unloaded methods the transition to zombie occurs after the |
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376 // method is cleared so it's impossible to report accurate |
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377 // information for that case. |
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378 bool is_synchronized = false; |
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379 bool has_exception_handler = false; |
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380 bool is_native = false; |
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381 if (method != NULL) { |
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382 is_synchronized = method->is_synchronized(); |
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383 has_exception_handler = method->has_exception_handler(); |
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384 is_native = method->is_native(); |
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385 } |
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386 // method attributes |
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387 const char compile_type = is_osr_method ? '%' : ' '; |
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388 const char sync_char = is_synchronized ? 's' : ' '; |
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389 const char exception_char = has_exception_handler ? '!' : ' '; |
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390 const char blocking_char = is_blocking ? 'b' : ' '; |
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391 const char native_char = is_native ? 'n' : ' '; |
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392 |
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393 // print method attributes |
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394 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); |
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395 |
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396 if (TieredCompilation) { |
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397 if (comp_level != -1) st->print("%d ", comp_level); |
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398 else st->print("- "); |
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399 } |
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400 st->print(" "); // more indent |
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401 |
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402 if (method == NULL) { |
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403 st->print("(method)"); |
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404 } else { |
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405 method->print_short_name(st); |
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406 if (is_osr_method) { |
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407 st->print(" @ %d", osr_bci); |
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408 } |
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409 st->print(" (%d bytes)", method->code_size()); |
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410 } |
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411 |
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412 if (msg != NULL) { |
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413 st->print(" %s", msg); |
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414 } |
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415 if (!short_form) { |
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416 st->cr(); |
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417 } |
0 | 418 } |
419 | |
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420 // ------------------------------------------------------------------ |
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421 // CompileTask::print_inlining |
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422 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { |
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423 // 1234567 |
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424 st->print(" "); // print timestamp |
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425 // 1234 |
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426 st->print(" "); // print compilation number |
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427 |
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428 // method attributes |
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429 const char sync_char = method->is_synchronized() ? 's' : ' '; |
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430 const char exception_char = method->has_exception_handlers() ? '!' : ' '; |
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431 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; |
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432 |
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433 // print method attributes |
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434 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); |
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435 |
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436 if (TieredCompilation) { |
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437 st->print(" "); |
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438 } |
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439 st->print(" "); // more indent |
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440 st->print(" "); // initial inlining indent |
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441 |
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442 for (int i = 0; i < inline_level; i++) st->print(" "); |
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443 |
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444 st->print("@ %d ", bci); // print bci |
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445 method->print_short_name(st); |
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446 st->print(" (%d bytes)", method->code_size()); |
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447 |
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448 if (msg != NULL) { |
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449 st->print(" %s", msg); |
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450 } |
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451 st->cr(); |
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452 } |
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453 |
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454 // ------------------------------------------------------------------ |
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455 // CompileTask::print_inline_indent |
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456 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { |
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457 // 1234567 |
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458 st->print(" "); // print timestamp |
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459 // 1234 |
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460 st->print(" "); // print compilation number |
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461 // %s!bn |
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462 st->print(" "); // print method attributes |
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463 if (TieredCompilation) { |
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464 st->print(" "); |
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465 } |
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466 st->print(" "); // more indent |
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467 st->print(" "); // initial inlining indent |
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468 for (int i = 0; i < inline_level; i++) st->print(" "); |
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469 } |
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470 |
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471 // ------------------------------------------------------------------ |
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472 // CompileTask::print_compilation |
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473 void CompileTask::print_compilation(outputStream* st, bool short_form) { |
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474 oop rem = JNIHandles::resolve(method_handle()); |
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475 assert(rem != NULL && rem->is_method(), "must be"); |
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476 methodOop method = (methodOop) rem; |
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477 bool is_osr_method = osr_bci() != InvocationEntryBci; |
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478 print_compilation_impl(st, method, compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), NULL, short_form); |
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479 } |
0 | 480 |
481 // ------------------------------------------------------------------ | |
482 // CompileTask::log_task | |
483 void CompileTask::log_task(xmlStream* log) { | |
484 Thread* thread = Thread::current(); | |
485 methodHandle method(thread, | |
486 (methodOop)JNIHandles::resolve(method_handle())); | |
487 ResourceMark rm(thread); | |
488 | |
489 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> | |
490 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); | |
491 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
492 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind | |
493 } // else compile_kind='c2c' | |
494 if (!method.is_null()) log->method(method); | |
495 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
496 log->print(" osr_bci='%d'", _osr_bci); | |
497 } | |
498 if (_comp_level != CompLevel_highest_tier) { | |
499 log->print(" level='%d'", _comp_level); | |
500 } | |
501 if (_is_blocking) { | |
502 log->print(" blocking='1'"); | |
503 } | |
504 log->stamp(); | |
505 } | |
506 | |
507 | |
508 // ------------------------------------------------------------------ | |
509 // CompileTask::log_task_queued | |
510 void CompileTask::log_task_queued() { | |
511 Thread* thread = Thread::current(); | |
512 ttyLocker ttyl; | |
513 ResourceMark rm(thread); | |
514 | |
515 xtty->begin_elem("task_queued"); | |
516 log_task(xtty); | |
517 if (_comment != NULL) { | |
518 xtty->print(" comment='%s'", _comment); | |
519 } | |
520 if (_hot_method != NULL) { | |
521 methodHandle hot(thread, | |
522 (methodOop)JNIHandles::resolve(_hot_method)); | |
523 methodHandle method(thread, | |
524 (methodOop)JNIHandles::resolve(_method)); | |
525 if (hot() != method()) { | |
526 xtty->method(hot); | |
527 } | |
528 } | |
529 if (_hot_count != 0) { | |
530 xtty->print(" hot_count='%d'", _hot_count); | |
531 } | |
532 xtty->end_elem(); | |
533 } | |
534 | |
535 | |
536 // ------------------------------------------------------------------ | |
537 // CompileTask::log_task_start | |
538 void CompileTask::log_task_start(CompileLog* log) { | |
539 log->begin_head("task"); | |
540 log_task(log); | |
541 log->end_head(); | |
542 } | |
543 | |
544 | |
545 // ------------------------------------------------------------------ | |
546 // CompileTask::log_task_done | |
547 void CompileTask::log_task_done(CompileLog* log) { | |
548 Thread* thread = Thread::current(); | |
549 methodHandle method(thread, | |
550 (methodOop)JNIHandles::resolve(method_handle())); | |
551 ResourceMark rm(thread); | |
552 | |
553 // <task_done ... stamp='1.234'> </task> | |
554 nmethod* nm = code(); | |
555 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", | |
1748 | 556 _is_success, nm == NULL ? 0 : nm->content_size(), |
0 | 557 method->invocation_count()); |
558 int bec = method->backedge_count(); | |
559 if (bec != 0) log->print(" backedge_count='%d'", bec); | |
560 // Note: "_is_complete" is about to be set, but is not. | |
561 if (_num_inlined_bytecodes != 0) { | |
562 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); | |
563 } | |
564 log->stamp(); | |
565 log->end_elem(); | |
566 log->tail("task"); | |
567 log->clear_identities(); // next task will have different CI | |
568 if (log->unflushed_count() > 2000) { | |
569 log->flush(); | |
570 } | |
571 log->mark_file_end(); | |
572 } | |
573 | |
574 | |
575 | |
576 // ------------------------------------------------------------------ | |
577 // CompileQueue::add | |
578 // | |
579 // Add a CompileTask to a CompileQueue | |
580 void CompileQueue::add(CompileTask* task) { | |
581 assert(lock()->owned_by_self(), "must own lock"); | |
582 | |
583 task->set_next(NULL); | |
1783 | 584 task->set_prev(NULL); |
0 | 585 |
586 if (_last == NULL) { | |
587 // The compile queue is empty. | |
588 assert(_first == NULL, "queue is empty"); | |
589 _first = task; | |
590 _last = task; | |
591 } else { | |
592 // Append the task to the queue. | |
593 assert(_last->next() == NULL, "not last"); | |
594 _last->set_next(task); | |
1783 | 595 task->set_prev(_last); |
0 | 596 _last = task; |
597 } | |
1783 | 598 ++_size; |
0 | 599 |
600 // Mark the method as being in the compile queue. | |
601 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); | |
602 | |
603 if (CIPrintCompileQueue) { | |
604 print(); | |
605 } | |
606 | |
607 if (LogCompilation && xtty != NULL) { | |
608 task->log_task_queued(); | |
609 } | |
610 | |
611 // Notify CompilerThreads that a task is available. | |
1783 | 612 lock()->notify_all(); |
0 | 613 } |
614 | |
615 // ------------------------------------------------------------------ | |
616 // CompileQueue::get | |
617 // | |
618 // Get the next CompileTask from a CompileQueue | |
619 CompileTask* CompileQueue::get() { | |
1538
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620 NMethodSweeper::possibly_sweep(); |
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621 |
0 | 622 MutexLocker locker(lock()); |
623 // Wait for an available CompileTask. | |
624 while (_first == NULL) { | |
625 // There is no work to be done right now. Wait. | |
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626 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { |
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627 // During the emergency sweeping periods, wake up and sweep occasionally |
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628 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); |
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629 if (timedout) { |
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630 MutexUnlocker ul(lock()); |
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631 // When otherwise not busy, run nmethod sweeping |
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632 NMethodSweeper::possibly_sweep(); |
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633 } |
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634 } else { |
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635 // During normal operation no need to wake up on timer |
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636 lock()->wait(); |
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637 } |
0 | 638 } |
1783 | 639 CompileTask* task = CompilationPolicy::policy()->select_task(this); |
640 remove(task); | |
641 return task; | |
642 } | |
0 | 643 |
1783 | 644 void CompileQueue::remove(CompileTask* task) |
645 { | |
646 assert(lock()->owned_by_self(), "must own lock"); | |
647 if (task->prev() != NULL) { | |
648 task->prev()->set_next(task->next()); | |
649 } else { | |
650 // max is the first element | |
651 assert(task == _first, "Sanity"); | |
652 _first = task->next(); | |
0 | 653 } |
654 | |
1783 | 655 if (task->next() != NULL) { |
656 task->next()->set_prev(task->prev()); | |
657 } else { | |
658 // max is the last element | |
659 assert(task == _last, "Sanity"); | |
660 _last = task->prev(); | |
661 } | |
662 --_size; | |
0 | 663 } |
664 | |
665 // ------------------------------------------------------------------ | |
666 // CompileQueue::print | |
667 void CompileQueue::print() { | |
668 tty->print_cr("Contents of %s", name()); | |
669 tty->print_cr("----------------------"); | |
670 CompileTask* task = _first; | |
671 while (task != NULL) { | |
672 task->print_line(); | |
673 task = task->next(); | |
674 } | |
675 tty->print_cr("----------------------"); | |
676 } | |
677 | |
678 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { | |
679 | |
680 _current_method[0] = '\0'; | |
681 _compile_type = CompileBroker::no_compile; | |
682 | |
683 if (UsePerfData) { | |
684 ResourceMark rm; | |
685 | |
686 // create the thread instance name space string - don't create an | |
687 // instance subspace if instance is -1 - keeps the adapterThread | |
688 // counters from having a ".0" namespace. | |
689 const char* thread_i = (instance == -1) ? thread_name : | |
690 PerfDataManager::name_space(thread_name, instance); | |
691 | |
692 | |
693 char* name = PerfDataManager::counter_name(thread_i, "method"); | |
694 _perf_current_method = | |
695 PerfDataManager::create_string_variable(SUN_CI, name, | |
696 cmname_buffer_length, | |
697 _current_method, CHECK); | |
698 | |
699 name = PerfDataManager::counter_name(thread_i, "type"); | |
700 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, | |
701 PerfData::U_None, | |
702 (jlong)_compile_type, | |
703 CHECK); | |
704 | |
705 name = PerfDataManager::counter_name(thread_i, "time"); | |
706 _perf_time = PerfDataManager::create_counter(SUN_CI, name, | |
707 PerfData::U_Ticks, CHECK); | |
708 | |
709 name = PerfDataManager::counter_name(thread_i, "compiles"); | |
710 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, | |
711 PerfData::U_Events, CHECK); | |
712 } | |
713 } | |
714 | |
715 // ------------------------------------------------------------------ | |
716 // CompileBroker::compilation_init | |
717 // | |
718 // Initialize the Compilation object | |
719 void CompileBroker::compilation_init() { | |
720 _last_method_compiled[0] = '\0'; | |
721 | |
1970 | 722 #ifndef SHARK |
0 | 723 // Set the interface to the current compiler(s). |
1783 | 724 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); |
725 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); | |
0 | 726 #ifdef COMPILER1 |
1783 | 727 if (c1_count > 0) { |
728 _compilers[0] = new Compiler(); | |
729 } | |
0 | 730 #endif // COMPILER1 |
731 | |
732 #ifdef COMPILER2 | |
1783 | 733 if (c2_count > 0) { |
734 _compilers[1] = new C2Compiler(); | |
735 } | |
0 | 736 #endif // COMPILER2 |
737 | |
1970 | 738 #else // SHARK |
739 int c1_count = 0; | |
740 int c2_count = 1; | |
741 | |
742 _compilers[1] = new SharkCompiler(); | |
743 #endif // SHARK | |
1692 | 744 |
0 | 745 // Initialize the CompileTask free list |
746 _task_free_list = NULL; | |
747 | |
748 // Start the CompilerThreads | |
1783 | 749 init_compiler_threads(c1_count, c2_count); |
0 | 750 // totalTime performance counter is always created as it is required |
751 // by the implementation of java.lang.management.CompilationMBean. | |
752 { | |
753 EXCEPTION_MARK; | |
754 _perf_total_compilation = | |
755 PerfDataManager::create_counter(JAVA_CI, "totalTime", | |
756 PerfData::U_Ticks, CHECK); | |
757 } | |
758 | |
759 | |
760 if (UsePerfData) { | |
761 | |
762 EXCEPTION_MARK; | |
763 | |
764 // create the jvmstat performance counters | |
765 _perf_osr_compilation = | |
766 PerfDataManager::create_counter(SUN_CI, "osrTime", | |
767 PerfData::U_Ticks, CHECK); | |
768 | |
769 _perf_standard_compilation = | |
770 PerfDataManager::create_counter(SUN_CI, "standardTime", | |
771 PerfData::U_Ticks, CHECK); | |
772 | |
773 _perf_total_bailout_count = | |
774 PerfDataManager::create_counter(SUN_CI, "totalBailouts", | |
775 PerfData::U_Events, CHECK); | |
776 | |
777 _perf_total_invalidated_count = | |
778 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", | |
779 PerfData::U_Events, CHECK); | |
780 | |
781 _perf_total_compile_count = | |
782 PerfDataManager::create_counter(SUN_CI, "totalCompiles", | |
783 PerfData::U_Events, CHECK); | |
784 _perf_total_osr_compile_count = | |
785 PerfDataManager::create_counter(SUN_CI, "osrCompiles", | |
786 PerfData::U_Events, CHECK); | |
787 | |
788 _perf_total_standard_compile_count = | |
789 PerfDataManager::create_counter(SUN_CI, "standardCompiles", | |
790 PerfData::U_Events, CHECK); | |
791 | |
792 _perf_sum_osr_bytes_compiled = | |
793 PerfDataManager::create_counter(SUN_CI, "osrBytes", | |
794 PerfData::U_Bytes, CHECK); | |
795 | |
796 _perf_sum_standard_bytes_compiled = | |
797 PerfDataManager::create_counter(SUN_CI, "standardBytes", | |
798 PerfData::U_Bytes, CHECK); | |
799 | |
800 _perf_sum_nmethod_size = | |
801 PerfDataManager::create_counter(SUN_CI, "nmethodSize", | |
802 PerfData::U_Bytes, CHECK); | |
803 | |
804 _perf_sum_nmethod_code_size = | |
805 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", | |
806 PerfData::U_Bytes, CHECK); | |
807 | |
808 _perf_last_method = | |
809 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", | |
810 CompilerCounters::cmname_buffer_length, | |
811 "", CHECK); | |
812 | |
813 _perf_last_failed_method = | |
814 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", | |
815 CompilerCounters::cmname_buffer_length, | |
816 "", CHECK); | |
817 | |
818 _perf_last_invalidated_method = | |
819 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", | |
820 CompilerCounters::cmname_buffer_length, | |
821 "", CHECK); | |
822 | |
823 _perf_last_compile_type = | |
824 PerfDataManager::create_variable(SUN_CI, "lastType", | |
825 PerfData::U_None, | |
826 (jlong)CompileBroker::no_compile, | |
827 CHECK); | |
828 | |
829 _perf_last_compile_size = | |
830 PerfDataManager::create_variable(SUN_CI, "lastSize", | |
831 PerfData::U_Bytes, | |
832 (jlong)CompileBroker::no_compile, | |
833 CHECK); | |
834 | |
835 | |
836 _perf_last_failed_type = | |
837 PerfDataManager::create_variable(SUN_CI, "lastFailedType", | |
838 PerfData::U_None, | |
839 (jlong)CompileBroker::no_compile, | |
840 CHECK); | |
841 | |
842 _perf_last_invalidated_type = | |
843 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", | |
844 PerfData::U_None, | |
845 (jlong)CompileBroker::no_compile, | |
846 CHECK); | |
847 } | |
848 | |
849 _initialized = true; | |
850 } | |
851 | |
852 | |
853 | |
854 // ------------------------------------------------------------------ | |
855 // CompileBroker::make_compiler_thread | |
856 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { | |
857 CompilerThread* compiler_thread = NULL; | |
858 | |
859 klassOop k = | |
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860 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), |
0 | 861 true, CHECK_0); |
862 instanceKlassHandle klass (THREAD, k); | |
863 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); | |
864 Handle string = java_lang_String::create_from_str(name, CHECK_0); | |
865 | |
866 // Initialize thread_oop to put it into the system threadGroup | |
867 Handle thread_group (THREAD, Universe::system_thread_group()); | |
868 JavaValue result(T_VOID); | |
869 JavaCalls::call_special(&result, thread_oop, | |
870 klass, | |
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871 vmSymbols::object_initializer_name(), |
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872 vmSymbols::threadgroup_string_void_signature(), |
0 | 873 thread_group, |
874 string, | |
875 CHECK_0); | |
876 | |
877 { | |
878 MutexLocker mu(Threads_lock, THREAD); | |
879 compiler_thread = new CompilerThread(queue, counters); | |
880 // At this point the new CompilerThread data-races with this startup | |
881 // thread (which I believe is the primoridal thread and NOT the VM | |
882 // thread). This means Java bytecodes being executed at startup can | |
883 // queue compile jobs which will run at whatever default priority the | |
884 // newly created CompilerThread runs at. | |
885 | |
886 | |
887 // At this point it may be possible that no osthread was created for the | |
888 // JavaThread due to lack of memory. We would have to throw an exception | |
889 // in that case. However, since this must work and we do not allow | |
890 // exceptions anyway, check and abort if this fails. | |
891 | |
892 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ | |
893 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
894 "unable to create new native thread"); | |
895 } | |
896 | |
897 java_lang_Thread::set_thread(thread_oop(), compiler_thread); | |
898 | |
899 // Note that this only sets the JavaThread _priority field, which by | |
900 // definition is limited to Java priorities and not OS priorities. | |
901 // The os-priority is set in the CompilerThread startup code itself | |
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902 |
0 | 903 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); |
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904 |
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905 // Note that we cannot call os::set_priority because it expects Java |
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906 // priorities and we are *explicitly* using OS priorities so that it's |
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907 // possible to set the compiler thread priority higher than any Java |
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908 // thread. |
0 | 909 |
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910 int native_prio = CompilerThreadPriority; |
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911 if (native_prio == -1) { |
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912 if (UseCriticalCompilerThreadPriority) { |
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913 native_prio = os::java_to_os_priority[CriticalPriority]; |
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914 } else { |
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915 native_prio = os::java_to_os_priority[NearMaxPriority]; |
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916 } |
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917 } |
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918 os::set_native_priority(compiler_thread, native_prio); |
0 | 919 |
920 java_lang_Thread::set_daemon(thread_oop()); | |
921 | |
922 compiler_thread->set_threadObj(thread_oop()); | |
923 Threads::add(compiler_thread); | |
924 Thread::start(compiler_thread); | |
925 } | |
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926 |
0 | 927 // Let go of Threads_lock before yielding |
928 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) | |
929 | |
930 return compiler_thread; | |
931 } | |
932 | |
933 | |
934 // ------------------------------------------------------------------ | |
935 // CompileBroker::init_compiler_threads | |
936 // | |
937 // Initialize the compilation queue | |
1783 | 938 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { |
0 | 939 EXCEPTION_MARK; |
2447 | 940 #if !defined(ZERO) && !defined(SHARK) |
1783 | 941 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); |
2447 | 942 #endif // !ZERO && !SHARK |
1783 | 943 if (c2_compiler_count > 0) { |
944 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); | |
945 } | |
946 if (c1_compiler_count > 0) { | |
947 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); | |
948 } | |
0 | 949 |
1783 | 950 int compiler_count = c1_compiler_count + c2_compiler_count; |
951 | |
0 | 952 _method_threads = |
953 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); | |
954 | |
955 char name_buffer[256]; | |
1783 | 956 for (int i = 0; i < c2_compiler_count; i++) { |
0 | 957 // Create a name for our thread. |
1783 | 958 sprintf(name_buffer, "C2 CompilerThread%d", i); |
0 | 959 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); |
1783 | 960 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); |
0 | 961 _method_threads->append(new_thread); |
962 } | |
1783 | 963 |
964 for (int i = c2_compiler_count; i < compiler_count; i++) { | |
965 // Create a name for our thread. | |
966 sprintf(name_buffer, "C1 CompilerThread%d", i); | |
967 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); | |
968 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); | |
969 _method_threads->append(new_thread); | |
970 } | |
971 | |
0 | 972 if (UsePerfData) { |
973 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, | |
974 compiler_count, CHECK); | |
975 } | |
976 } | |
977 | |
978 // ------------------------------------------------------------------ | |
979 // CompileBroker::is_idle | |
980 bool CompileBroker::is_idle() { | |
1783 | 981 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { |
982 return false; | |
983 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { | |
0 | 984 return false; |
985 } else { | |
986 int num_threads = _method_threads->length(); | |
987 for (int i=0; i<num_threads; i++) { | |
988 if (_method_threads->at(i)->task() != NULL) { | |
989 return false; | |
990 } | |
991 } | |
992 | |
993 // No pending or active compilations. | |
994 return true; | |
995 } | |
996 } | |
997 | |
998 | |
999 // ------------------------------------------------------------------ | |
1000 // CompileBroker::compile_method | |
1001 // | |
1002 // Request compilation of a method. | |
1003 void CompileBroker::compile_method_base(methodHandle method, | |
1004 int osr_bci, | |
1005 int comp_level, | |
1006 methodHandle hot_method, | |
1007 int hot_count, | |
1008 const char* comment, | |
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1009 Thread* thread) { |
0 | 1010 // do nothing if compiler thread(s) is not available |
1011 if (!_initialized ) { | |
1012 return; | |
1013 } | |
1014 | |
1015 guarantee(!method->is_abstract(), "cannot compile abstract methods"); | |
1016 assert(method->method_holder()->klass_part()->oop_is_instance(), | |
1017 "sanity check"); | |
1018 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), | |
1019 "method holder must be initialized"); | |
1020 | |
1021 if (CIPrintRequests) { | |
1022 tty->print("request: "); | |
1023 method->print_short_name(tty); | |
1024 if (osr_bci != InvocationEntryBci) { | |
1025 tty->print(" osr_bci: %d", osr_bci); | |
1026 } | |
1027 tty->print(" comment: %s count: %d", comment, hot_count); | |
1028 if (!hot_method.is_null()) { | |
1029 tty->print(" hot: "); | |
1030 if (hot_method() != method()) { | |
1031 hot_method->print_short_name(tty); | |
1032 } else { | |
1033 tty->print("yes"); | |
1034 } | |
1035 } | |
1036 tty->cr(); | |
1037 } | |
1038 | |
1039 // A request has been made for compilation. Before we do any | |
1040 // real work, check to see if the method has been compiled | |
1041 // in the meantime with a definitive result. | |
1042 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1043 return; | |
1044 } | |
1045 | |
2403 | 1046 #ifndef PRODUCT |
1047 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { | |
1048 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { | |
1049 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. | |
1050 return; | |
1051 } | |
1052 } | |
1053 #endif | |
1783 | 1054 |
0 | 1055 // If this method is already in the compile queue, then |
1056 // we do not block the current thread. | |
1057 if (compilation_is_in_queue(method, osr_bci)) { | |
1058 // We may want to decay our counter a bit here to prevent | |
1059 // multiple denied requests for compilation. This is an | |
1060 // open compilation policy issue. Note: The other possibility, | |
1061 // in the case that this is a blocking compile request, is to have | |
1062 // all subsequent blocking requesters wait for completion of | |
1063 // ongoing compiles. Note that in this case we'll need a protocol | |
1064 // for freeing the associated compile tasks. [Or we could have | |
1065 // a single static monitor on which all these waiters sleep.] | |
1066 return; | |
1067 } | |
1068 | |
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1069 // If the requesting thread is holding the pending list lock |
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1070 // then we just return. We can't risk blocking while holding |
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1071 // the pending list lock or a 3-way deadlock may occur |
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1072 // between the reference handler thread, a GC (instigated |
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1073 // by a compiler thread), and compiled method registration. |
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1074 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) { |
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1075 return; |
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1076 } |
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1077 |
0 | 1078 // Outputs from the following MutexLocker block: |
1079 CompileTask* task = NULL; | |
1080 bool blocking = false; | |
1783 | 1081 CompileQueue* queue = compile_queue(comp_level); |
0 | 1082 |
1083 // Acquire our lock. | |
1084 { | |
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1085 MutexLocker locker(queue->lock(), thread); |
0 | 1086 |
1087 // Make sure the method has not slipped into the queues since | |
1088 // last we checked; note that those checks were "fast bail-outs". | |
1089 // Here we need to be more careful, see 14012000 below. | |
1090 if (compilation_is_in_queue(method, osr_bci)) { | |
1091 return; | |
1092 } | |
1093 | |
1094 // We need to check again to see if the compilation has | |
1095 // completed. A previous compilation may have registered | |
1096 // some result. | |
1097 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1098 return; | |
1099 } | |
1100 | |
1101 // We now know that this compilation is not pending, complete, | |
1102 // or prohibited. Assign a compile_id to this compilation | |
1103 // and check to see if it is in our [Start..Stop) range. | |
1104 uint compile_id = assign_compile_id(method, osr_bci); | |
1105 if (compile_id == 0) { | |
1106 // The compilation falls outside the allowed range. | |
1107 return; | |
1108 } | |
1109 | |
1110 // Should this thread wait for completion of the compile? | |
1111 blocking = is_compile_blocking(method, osr_bci); | |
1112 | |
1113 // We will enter the compilation in the queue. | |
1114 // 14012000: Note that this sets the queued_for_compile bits in | |
1115 // the target method. We can now reason that a method cannot be | |
1116 // queued for compilation more than once, as follows: | |
1117 // Before a thread queues a task for compilation, it first acquires | |
1118 // the compile queue lock, then checks if the method's queued bits | |
1119 // are set or it has already been compiled. Thus there can not be two | |
1120 // instances of a compilation task for the same method on the | |
1121 // compilation queue. Consider now the case where the compilation | |
1122 // thread has already removed a task for that method from the queue | |
1123 // and is in the midst of compiling it. In this case, the | |
1124 // queued_for_compile bits must be set in the method (and these | |
1125 // will be visible to the current thread, since the bits were set | |
1126 // under protection of the compile queue lock, which we hold now. | |
1127 // When the compilation completes, the compiler thread first sets | |
1128 // the compilation result and then clears the queued_for_compile | |
1129 // bits. Neither of these actions are protected by a barrier (or done | |
1130 // under the protection of a lock), so the only guarantee we have | |
1131 // (on machines with TSO (Total Store Order)) is that these values | |
1132 // will update in that order. As a result, the only combinations of | |
1133 // these bits that the current thread will see are, in temporal order: | |
1134 // <RESULT, QUEUE> : | |
1135 // <0, 1> : in compile queue, but not yet compiled | |
1136 // <1, 1> : compiled but queue bit not cleared | |
1137 // <1, 0> : compiled and queue bit cleared | |
1138 // Because we first check the queue bits then check the result bits, | |
1139 // we are assured that we cannot introduce a duplicate task. | |
1140 // Note that if we did the tests in the reverse order (i.e. check | |
1141 // result then check queued bit), we could get the result bit before | |
1142 // the compilation completed, and the queue bit after the compilation | |
1143 // completed, and end up introducing a "duplicate" (redundant) task. | |
1144 // In that case, the compiler thread should first check if a method | |
1145 // has already been compiled before trying to compile it. | |
1146 // NOTE: in the event that there are multiple compiler threads and | |
1147 // there is de-optimization/recompilation, things will get hairy, | |
1148 // and in that case it's best to protect both the testing (here) of | |
1149 // these bits, and their updating (here and elsewhere) under a | |
1150 // common lock. | |
1783 | 1151 task = create_compile_task(queue, |
0 | 1152 compile_id, method, |
1153 osr_bci, comp_level, | |
1154 hot_method, hot_count, comment, | |
1155 blocking); | |
1156 } | |
1157 | |
1158 if (blocking) { | |
1159 wait_for_completion(task); | |
1160 } | |
1161 } | |
1162 | |
1163 | |
1164 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, | |
1783 | 1165 int comp_level, |
0 | 1166 methodHandle hot_method, int hot_count, |
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1167 const char* comment, Thread* THREAD) { |
0 | 1168 // make sure arguments make sense |
1169 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); | |
1170 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); | |
1171 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); | |
1172 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); | |
1173 | |
1783 | 1174 if (!TieredCompilation) { |
1175 comp_level = CompLevel_highest_tier; | |
0 | 1176 } |
1177 | |
1178 // return quickly if possible | |
1179 | |
1180 // lock, make sure that the compilation | |
1181 // isn't prohibited in a straightforward way. | |
1182 | |
1183 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { | |
1184 return NULL; | |
1185 } | |
1186 | |
1187 if (osr_bci == InvocationEntryBci) { | |
1188 // standard compilation | |
1189 nmethod* method_code = method->code(); | |
1783 | 1190 if (method_code != NULL) { |
1191 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1192 return method_code; | |
1193 } | |
0 | 1194 } |
1195 if (method->is_not_compilable(comp_level)) return NULL; | |
1202 | 1196 |
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1197 if (UseCodeCacheFlushing) { |
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1198 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); |
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1199 if (saved != NULL) { |
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1200 method->set_code(method, saved); |
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1201 return saved; |
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1202 } |
1202 | 1203 } |
1204 | |
0 | 1205 } else { |
1206 // osr compilation | |
1207 #ifndef TIERED | |
1208 // seems like an assert of dubious value | |
1783 | 1209 assert(comp_level == CompLevel_highest_tier, |
0 | 1210 "all OSR compiles are assumed to be at a single compilation lavel"); |
1211 #endif // TIERED | |
1783 | 1212 // We accept a higher level osr method |
1213 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1214 if (nm != NULL) return nm; |
1215 if (method->is_not_osr_compilable()) return NULL; | |
1216 } | |
1217 | |
1218 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); | |
1219 // some prerequisites that are compiler specific | |
2447 | 1220 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) { |
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1221 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); |
0 | 1222 // Resolve all classes seen in the signature of the method |
1223 // we are compiling. | |
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1224 methodOopDesc::load_signature_classes(method, CHECK_AND_CLEAR_NULL); |
0 | 1225 } |
1226 | |
1227 // If the method is native, do the lookup in the thread requesting | |
1228 // the compilation. Native lookups can load code, which is not | |
1229 // permitted during compilation. | |
1230 // | |
1231 // Note: A native method implies non-osr compilation which is | |
1232 // checked with an assertion at the entry of this method. | |
1233 if (method->is_native()) { | |
1234 bool in_base_library; | |
1235 address adr = NativeLookup::lookup(method, in_base_library, THREAD); | |
1236 if (HAS_PENDING_EXCEPTION) { | |
1237 // In case of an exception looking up the method, we just forget | |
1238 // about it. The interpreter will kick-in and throw the exception. | |
1239 method->set_not_compilable(); // implies is_not_osr_compilable() | |
1240 CLEAR_PENDING_EXCEPTION; | |
1241 return NULL; | |
1242 } | |
1243 assert(method->has_native_function(), "must have native code by now"); | |
1244 } | |
1245 | |
1246 // RedefineClasses() has replaced this method; just return | |
1247 if (method->is_old()) { | |
1248 return NULL; | |
1249 } | |
1250 | |
1251 // JVMTI -- post_compile_event requires jmethod_id() that may require | |
1252 // a lock the compiling thread can not acquire. Prefetch it here. | |
1253 if (JvmtiExport::should_post_compiled_method_load()) { | |
1254 method->jmethod_id(); | |
1255 } | |
1256 | |
1202 | 1257 // If the compiler is shut off due to code cache flushing or otherwise, |
1258 // fail out now so blocking compiles dont hang the java thread | |
1259 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { | |
1783 | 1260 CompilationPolicy::policy()->delay_compilation(method()); |
1202 | 1261 return NULL; |
1262 } | |
1263 | |
0 | 1264 // do the compilation |
1265 if (method->is_native()) { | |
1266 if (!PreferInterpreterNativeStubs) { | |
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1267 // Acquire our lock. |
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1268 int compile_id; |
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1269 { |
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1270 MutexLocker locker(MethodCompileQueue_lock, THREAD); |
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1271 compile_id = assign_compile_id(method, standard_entry_bci); |
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1272 } |
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1273 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id); |
0 | 1274 } else { |
1275 return NULL; | |
1276 } | |
1277 } else { | |
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1278 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD); |
0 | 1279 } |
1280 | |
1281 // return requested nmethod | |
1783 | 1282 // We accept a higher level osr method |
1283 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1284 } |
1285 | |
1286 | |
1287 // ------------------------------------------------------------------ | |
1288 // CompileBroker::compilation_is_complete | |
1289 // | |
1290 // See if compilation of this method is already complete. | |
1291 bool CompileBroker::compilation_is_complete(methodHandle method, | |
1292 int osr_bci, | |
1293 int comp_level) { | |
1294 bool is_osr = (osr_bci != standard_entry_bci); | |
1295 if (is_osr) { | |
1296 if (method->is_not_osr_compilable()) { | |
1297 return true; | |
1298 } else { | |
1783 | 1299 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
0 | 1300 return (result != NULL); |
1301 } | |
1302 } else { | |
1303 if (method->is_not_compilable(comp_level)) { | |
1304 return true; | |
1305 } else { | |
1306 nmethod* result = method->code(); | |
1307 if (result == NULL) return false; | |
1783 | 1308 return comp_level == result->comp_level(); |
0 | 1309 } |
1310 } | |
1311 } | |
1312 | |
1313 | |
1314 // ------------------------------------------------------------------ | |
1315 // CompileBroker::compilation_is_in_queue | |
1316 // | |
1317 // See if this compilation is already requested. | |
1318 // | |
1319 // Implementation note: there is only a single "is in queue" bit | |
1320 // for each method. This means that the check below is overly | |
1321 // conservative in the sense that an osr compilation in the queue | |
1322 // will block a normal compilation from entering the queue (and vice | |
1323 // versa). This can be remedied by a full queue search to disambiguate | |
1324 // cases. If it is deemed profitible, this may be done. | |
1325 bool CompileBroker::compilation_is_in_queue(methodHandle method, | |
1783 | 1326 int osr_bci) { |
0 | 1327 return method->queued_for_compilation(); |
1328 } | |
1329 | |
1330 // ------------------------------------------------------------------ | |
1331 // CompileBroker::compilation_is_prohibited | |
1332 // | |
1333 // See if this compilation is not allowed. | |
1334 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { | |
1335 bool is_native = method->is_native(); | |
1336 // Some compilers may not support the compilation of natives. | |
1337 if (is_native && | |
1338 (!CICompileNatives || !compiler(comp_level)->supports_native())) { | |
1783 | 1339 method->set_not_compilable_quietly(comp_level); |
0 | 1340 return true; |
1341 } | |
1342 | |
1343 bool is_osr = (osr_bci != standard_entry_bci); | |
1344 // Some compilers may not support on stack replacement. | |
1345 if (is_osr && | |
1346 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { | |
1347 method->set_not_osr_compilable(); | |
1348 return true; | |
1349 } | |
1350 | |
1351 // The method may be explicitly excluded by the user. | |
1352 bool quietly; | |
1353 if (CompilerOracle::should_exclude(method, quietly)) { | |
1354 if (!quietly) { | |
1355 // This does not happen quietly... | |
1356 ResourceMark rm; | |
1357 tty->print("### Excluding %s:%s", | |
1358 method->is_native() ? "generation of native wrapper" : "compile", | |
1359 (method->is_static() ? " static" : "")); | |
1360 method->print_short_name(tty); | |
1361 tty->cr(); | |
1362 } | |
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1363 method->set_not_compilable_quietly(); |
0 | 1364 } |
1365 | |
1366 return false; | |
1367 } | |
1368 | |
1369 | |
1370 // ------------------------------------------------------------------ | |
1371 // CompileBroker::assign_compile_id | |
1372 // | |
1373 // Assign a serialized id number to this compilation request. If the | |
1374 // number falls out of the allowed range, return a 0. OSR | |
1375 // compilations may be numbered separately from regular compilations | |
1376 // if certain debugging flags are used. | |
1377 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { | |
1783 | 1378 assert(MethodCompileQueue_lock->owner() == Thread::current(), |
0 | 1379 "must hold the compilation queue lock"); |
1380 bool is_osr = (osr_bci != standard_entry_bci); | |
1381 uint id; | |
1382 if (CICountOSR && is_osr) { | |
1383 id = ++_osr_compilation_id; | |
1384 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { | |
1385 return id; | |
1386 } | |
1387 } else { | |
1388 id = ++_compilation_id; | |
1389 if ((uint)CIStart <= id && id < (uint)CIStop) { | |
1390 return id; | |
1391 } | |
1392 } | |
1393 | |
1394 // Method was not in the appropriate compilation range. | |
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1395 method->set_not_compilable_quietly(); |
0 | 1396 return 0; |
1397 } | |
1398 | |
1399 | |
1400 // ------------------------------------------------------------------ | |
1401 // CompileBroker::is_compile_blocking | |
1402 // | |
1403 // Should the current thread be blocked until this compilation request | |
1404 // has been fulfilled? | |
1405 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { | |
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1406 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); |
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1407 return !BackgroundCompilation; |
0 | 1408 } |
1409 | |
1410 | |
1411 // ------------------------------------------------------------------ | |
1412 // CompileBroker::preload_classes | |
1413 void CompileBroker::preload_classes(methodHandle method, TRAPS) { | |
1414 // Move this code over from c1_Compiler.cpp | |
1415 ShouldNotReachHere(); | |
1416 } | |
1417 | |
1418 | |
1419 // ------------------------------------------------------------------ | |
1420 // CompileBroker::create_compile_task | |
1421 // | |
1422 // Create a CompileTask object representing the current request for | |
1423 // compilation. Add this task to the queue. | |
1424 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, | |
1425 int compile_id, | |
1426 methodHandle method, | |
1427 int osr_bci, | |
1428 int comp_level, | |
1429 methodHandle hot_method, | |
1430 int hot_count, | |
1431 const char* comment, | |
1432 bool blocking) { | |
1433 CompileTask* new_task = allocate_task(); | |
1434 new_task->initialize(compile_id, method, osr_bci, comp_level, | |
1435 hot_method, hot_count, comment, | |
1436 blocking); | |
1437 queue->add(new_task); | |
1438 return new_task; | |
1439 } | |
1440 | |
1441 | |
1442 // ------------------------------------------------------------------ | |
1443 // CompileBroker::allocate_task | |
1444 // | |
1445 // Allocate a CompileTask, from the free list if possible. | |
1446 CompileTask* CompileBroker::allocate_task() { | |
1447 MutexLocker locker(CompileTaskAlloc_lock); | |
1448 CompileTask* task = NULL; | |
1449 if (_task_free_list != NULL) { | |
1450 task = _task_free_list; | |
1451 _task_free_list = task->next(); | |
1452 task->set_next(NULL); | |
1453 } else { | |
1454 task = new CompileTask(); | |
1455 task->set_next(NULL); | |
1456 } | |
1457 return task; | |
1458 } | |
1459 | |
1460 | |
1461 // ------------------------------------------------------------------ | |
1462 // CompileBroker::free_task | |
1463 // | |
1464 // Add a task to the free list. | |
1465 void CompileBroker::free_task(CompileTask* task) { | |
1466 MutexLocker locker(CompileTaskAlloc_lock); | |
1467 task->free(); | |
1468 task->set_next(_task_free_list); | |
1469 _task_free_list = task; | |
1470 } | |
1471 | |
1472 | |
1473 // ------------------------------------------------------------------ | |
1474 // CompileBroker::wait_for_completion | |
1475 // | |
1476 // Wait for the given method CompileTask to complete. | |
1477 void CompileBroker::wait_for_completion(CompileTask* task) { | |
1478 if (CIPrintCompileQueue) { | |
1479 tty->print_cr("BLOCKING FOR COMPILE"); | |
1480 } | |
1481 | |
1482 assert(task->is_blocking(), "can only wait on blocking task"); | |
1483 | |
1484 JavaThread *thread = JavaThread::current(); | |
1485 thread->set_blocked_on_compilation(true); | |
1486 | |
1487 methodHandle method(thread, | |
1488 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1489 { | |
1490 MutexLocker waiter(task->lock(), thread); | |
1491 | |
1492 while (!task->is_complete()) | |
1493 task->lock()->wait(); | |
1494 } | |
1495 // It is harmless to check this status without the lock, because | |
1496 // completion is a stable property (until the task object is recycled). | |
1497 assert(task->is_complete(), "Compilation should have completed"); | |
1498 assert(task->code_handle() == NULL, "must be reset"); | |
1499 | |
1500 thread->set_blocked_on_compilation(false); | |
1501 | |
1502 // By convention, the waiter is responsible for recycling a | |
1503 // blocking CompileTask. Since there is only one waiter ever | |
1504 // waiting on a CompileTask, we know that no one else will | |
1505 // be using this CompileTask; we can free it. | |
1506 free_task(task); | |
1507 } | |
1508 | |
1509 // ------------------------------------------------------------------ | |
1510 // CompileBroker::compiler_thread_loop | |
1511 // | |
1512 // The main loop run by a CompilerThread. | |
1513 void CompileBroker::compiler_thread_loop() { | |
1514 CompilerThread* thread = CompilerThread::current(); | |
1515 CompileQueue* queue = thread->queue(); | |
1516 | |
1517 // For the thread that initializes the ciObjectFactory | |
1518 // this resource mark holds all the shared objects | |
1519 ResourceMark rm; | |
1520 | |
1521 // First thread to get here will initialize the compiler interface | |
1522 | |
1523 if (!ciObjectFactory::is_initialized()) { | |
1524 ASSERT_IN_VM; | |
1525 MutexLocker only_one (CompileThread_lock, thread); | |
1526 if (!ciObjectFactory::is_initialized()) { | |
1527 ciObjectFactory::initialize(); | |
1528 } | |
1529 } | |
1530 | |
1531 // Open a log. | |
1532 if (LogCompilation) { | |
1533 init_compiler_thread_log(); | |
1534 } | |
1535 CompileLog* log = thread->log(); | |
1536 if (log != NULL) { | |
1537 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", | |
1538 os::current_thread_id(), | |
1539 os::current_process_id()); | |
1540 log->stamp(); | |
1541 log->end_elem(); | |
1542 } | |
1543 | |
1544 while (true) { | |
1545 { | |
1546 // We need this HandleMark to avoid leaking VM handles. | |
1547 HandleMark hm(thread); | |
1202 | 1548 |
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1549 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) { |
1202 | 1550 // the code cache is really full |
1551 handle_full_code_cache(); | |
1552 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { | |
1553 // Attempt to start cleaning the code cache while there is still a little headroom | |
1554 NMethodSweeper::handle_full_code_cache(false); | |
0 | 1555 } |
1556 | |
1557 CompileTask* task = queue->get(); | |
1558 | |
1559 // Give compiler threads an extra quanta. They tend to be bursty and | |
1560 // this helps the compiler to finish up the job. | |
1561 if( CompilerThreadHintNoPreempt ) | |
1562 os::hint_no_preempt(); | |
1563 | |
1564 // trace per thread time and compile statistics | |
1565 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); | |
1566 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); | |
1567 | |
1568 // Assign the task to the current thread. Mark this compilation | |
1569 // thread as active for the profiler. | |
1570 CompileTaskWrapper ctw(task); | |
1571 nmethodLocker result_handle; // (handle for the nmethod produced by this task) | |
1572 task->set_code_handle(&result_handle); | |
1573 methodHandle method(thread, | |
1574 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1575 | |
1576 // Never compile a method if breakpoints are present in it | |
1577 if (method()->number_of_breakpoints() == 0) { | |
1578 // Compile the method. | |
1202 | 1579 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
0 | 1580 #ifdef COMPILER1 |
1581 // Allow repeating compilations for the purpose of benchmarking | |
1582 // compile speed. This is not useful for customers. | |
1583 if (CompilationRepeat != 0) { | |
1584 int compile_count = CompilationRepeat; | |
1585 while (compile_count > 0) { | |
1586 invoke_compiler_on_method(task); | |
1587 nmethod* nm = method->code(); | |
1588 if (nm != NULL) { | |
1589 nm->make_zombie(); | |
1590 method->clear_code(); | |
1591 } | |
1592 compile_count--; | |
1593 } | |
1594 } | |
1595 #endif /* COMPILER1 */ | |
1596 invoke_compiler_on_method(task); | |
1597 } else { | |
1598 // After compilation is disabled, remove remaining methods from queue | |
1599 method->clear_queued_for_compilation(); | |
1600 } | |
1601 } | |
1602 } | |
1603 } | |
1604 } | |
1605 | |
1606 | |
1607 // ------------------------------------------------------------------ | |
1608 // CompileBroker::init_compiler_thread_log | |
1609 // | |
1610 // Set up state required by +LogCompilation. | |
1611 void CompileBroker::init_compiler_thread_log() { | |
1612 CompilerThread* thread = CompilerThread::current(); | |
1613 char fileBuf[4*K]; | |
1614 FILE* fp = NULL; | |
1615 char* file = NULL; | |
1616 intx thread_id = os::current_thread_id(); | |
1617 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { | |
1618 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); | |
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1619 if (dir == NULL) { |
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1620 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", |
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1621 thread_id, os::current_process_id()); |
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1622 } else { |
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1623 jio_snprintf(fileBuf, sizeof(fileBuf), |
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1624 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
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1625 os::file_separator(), thread_id, os::current_process_id()); |
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1626 } |
0 | 1627 fp = fopen(fileBuf, "at"); |
1628 if (fp != NULL) { | |
1629 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); | |
1630 strcpy(file, fileBuf); | |
1631 break; | |
1632 } | |
1633 } | |
1634 if (fp == NULL) { | |
1635 warning("Cannot open log file: %s", fileBuf); | |
1636 } else { | |
1637 if (LogCompilation && Verbose) | |
1638 tty->print_cr("Opening compilation log %s", file); | |
1639 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); | |
1640 thread->init_log(log); | |
1641 | |
1642 if (xtty != NULL) { | |
1643 ttyLocker ttyl; | |
1644 | |
1645 // Record any per thread log files | |
1646 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); | |
1647 } | |
1648 } | |
1649 } | |
1650 | |
1651 // ------------------------------------------------------------------ | |
1652 // CompileBroker::set_should_block | |
1653 // | |
1654 // Set _should_block. | |
1655 // Call this from the VM, with Threads_lock held and a safepoint requested. | |
1656 void CompileBroker::set_should_block() { | |
1657 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
1658 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); | |
1659 #ifndef PRODUCT | |
1660 if (PrintCompilation && (Verbose || WizardMode)) | |
1661 tty->print_cr("notifying compiler thread pool to block"); | |
1662 #endif | |
1663 _should_block = true; | |
1664 } | |
1665 | |
1666 // ------------------------------------------------------------------ | |
1667 // CompileBroker::maybe_block | |
1668 // | |
1669 // Call this from the compiler at convenient points, to poll for _should_block. | |
1670 void CompileBroker::maybe_block() { | |
1671 if (_should_block) { | |
1672 #ifndef PRODUCT | |
1673 if (PrintCompilation && (Verbose || WizardMode)) | |
1674 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); | |
1675 #endif | |
1676 ThreadInVMfromNative tivfn(JavaThread::current()); | |
1677 } | |
1678 } | |
1679 | |
1680 | |
1681 // ------------------------------------------------------------------ | |
1682 // CompileBroker::invoke_compiler_on_method | |
1683 // | |
1684 // Compile a method. | |
1685 // | |
1686 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { | |
1687 if (PrintCompilation) { | |
1688 ResourceMark rm; | |
1689 task->print_line(); | |
1690 } | |
1691 elapsedTimer time; | |
1692 | |
1693 CompilerThread* thread = CompilerThread::current(); | |
1694 ResourceMark rm(thread); | |
1695 | |
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1696 if (LogEvents) { |
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1697 _compilation_log->log_compile(thread, task); |
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1698 } |
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1699 |
0 | 1700 // Common flags. |
1701 uint compile_id = task->compile_id(); | |
1702 int osr_bci = task->osr_bci(); | |
1703 bool is_osr = (osr_bci != standard_entry_bci); | |
1704 bool should_log = (thread->log() != NULL); | |
1705 bool should_break = false; | |
1706 { | |
1707 // create the handle inside it's own block so it can't | |
1708 // accidentally be referenced once the thread transitions to | |
1709 // native. The NoHandleMark before the transition should catch | |
1710 // any cases where this occurs in the future. | |
1711 methodHandle method(thread, | |
1712 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1713 should_break = check_break_at(method, compile_id, is_osr); | |
1714 if (should_log && !CompilerOracle::should_log(method)) { | |
1715 should_log = false; | |
1716 } | |
1717 assert(!method->is_native(), "no longer compile natives"); | |
1718 | |
1719 // Save information about this method in case of failure. | |
1720 set_last_compile(thread, method, is_osr, task->comp_level()); | |
1721 | |
1722 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); | |
1723 } | |
1724 | |
1725 // Allocate a new set of JNI handles. | |
1726 push_jni_handle_block(); | |
1727 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); | |
1728 int compilable = ciEnv::MethodCompilable; | |
1729 { | |
1730 int system_dictionary_modification_counter; | |
1731 { | |
1732 MutexLocker locker(Compile_lock, thread); | |
1733 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); | |
1734 } | |
1735 | |
1736 NoHandleMark nhm; | |
1737 ThreadToNativeFromVM ttn(thread); | |
1738 | |
1739 ciEnv ci_env(task, system_dictionary_modification_counter); | |
1740 if (should_break) { | |
1741 ci_env.set_break_at_compile(true); | |
1742 } | |
1743 if (should_log) { | |
1744 ci_env.set_log(thread->log()); | |
1745 } | |
1746 assert(thread->env() == &ci_env, "set by ci_env"); | |
1747 // The thread-env() field is cleared in ~CompileTaskWrapper. | |
1748 | |
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1749 // Cache Jvmti state |
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1750 ci_env.cache_jvmti_state(); |
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1751 |
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1752 // Cache DTrace flags |
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1753 ci_env.cache_dtrace_flags(); |
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1754 |
0 | 1755 ciMethod* target = ci_env.get_method_from_handle(target_handle); |
1756 | |
1757 TraceTime t1("compilation", &time); | |
1758 | |
1759 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); | |
1760 | |
1761 if (!ci_env.failing() && task->code() == NULL) { | |
1762 //assert(false, "compiler should always document failure"); | |
1763 // The compiler elected, without comment, not to register a result. | |
1764 // Do not attempt further compilations of this method. | |
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1765 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); |
0 | 1766 } |
1767 | |
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1768 // Copy this bit to the enclosing block: |
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1769 compilable = ci_env.compilable(); |
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1770 |
0 | 1771 if (ci_env.failing()) { |
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1772 const char* retry_message = ci_env.retry_message(); |
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1773 if (_compilation_log != NULL) { |
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1774 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message); |
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1775 } |
0 | 1776 if (PrintCompilation) { |
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1777 tty->print("%4d COMPILE SKIPPED: %s", compile_id, ci_env.failure_reason()); |
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1778 if (retry_message != NULL) { |
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1779 tty->print(" (%s)", retry_message); |
0 | 1780 } |
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1781 tty->cr(); |
0 | 1782 } |
1783 } else { | |
1784 task->mark_success(); | |
1785 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); | |
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1786 if (_compilation_log != NULL) { |
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1787 nmethod* code = task->code(); |
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1788 if (code != NULL) { |
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1789 _compilation_log->log_nmethod(thread, code); |
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1790 } |
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1791 } |
0 | 1792 } |
1793 } | |
1794 pop_jni_handle_block(); | |
1795 | |
1796 methodHandle method(thread, | |
1797 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1798 | |
1799 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); | |
1800 | |
1801 collect_statistics(thread, time, task); | |
1802 | |
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1803 if (PrintCompilation && PrintCompilation2) { |
4047 | 1804 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp |
1805 tty->print("%4d ", compile_id); // print compilation number | |
1806 tty->print("%s ", (is_osr ? "%" : " ")); | |
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1807 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size(); |
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1808 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes()); |
4047 | 1809 } |
1810 | |
0 | 1811 if (compilable == ciEnv::MethodCompilable_never) { |
1812 if (is_osr) { | |
1813 method->set_not_osr_compilable(); | |
1814 } else { | |
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1815 method->set_not_compilable_quietly(); |
0 | 1816 } |
1817 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
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1818 method->set_not_compilable_quietly(task->comp_level()); |
0 | 1819 } |
1820 | |
1821 // Note that the queued_for_compilation bits are cleared without | |
1822 // protection of a mutex. [They were set by the requester thread, | |
1823 // when adding the task to the complie queue -- at which time the | |
1824 // compile queue lock was held. Subsequently, we acquired the compile | |
1825 // queue lock to get this task off the compile queue; thus (to belabour | |
1826 // the point somewhat) our clearing of the bits must be occurring | |
1827 // only after the setting of the bits. See also 14012000 above. | |
1828 method->clear_queued_for_compilation(); | |
1829 | |
1830 #ifdef ASSERT | |
1831 if (CollectedHeap::fired_fake_oom()) { | |
1832 // The current compile received a fake OOM during compilation so | |
1833 // go ahead and exit the VM since the test apparently succeeded | |
1834 tty->print_cr("*** Shutting down VM after successful fake OOM"); | |
1835 vm_exit(0); | |
1836 } | |
1837 #endif | |
1838 } | |
1839 | |
1840 // ------------------------------------------------------------------ | |
1202 | 1841 // CompileBroker::handle_full_code_cache |
1842 // | |
1843 // The CodeCache is full. Print out warning and disable compilation or | |
1844 // try code cache cleaning so compilation can continue later. | |
1845 void CompileBroker::handle_full_code_cache() { | |
1846 UseInterpreter = true; | |
1847 if (UseCompiler || AlwaysCompileLoopMethods ) { | |
1728
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1848 if (xtty != NULL) { |
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1849 stringStream s; |
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1850 // Dump code cache state into a buffer before locking the tty, |
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1851 // because log_state() will use locks causing lock conflicts. |
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1852 CodeCache::log_state(&s); |
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1853 // Lock to prevent tearing |
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1854 ttyLocker ttyl; |
1728
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1855 xtty->begin_elem("code_cache_full"); |
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1856 xtty->print(s.as_string()); |
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1857 xtty->stamp(); |
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1858 xtty->end_elem(); |
1202 | 1859 } |
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1860 warning("CodeCache is full. Compiler has been disabled."); |
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1861 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); |
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1862 CodeCache::print_bounds(tty); |
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1863 #ifndef PRODUCT |
1202 | 1864 if (CompileTheWorld || ExitOnFullCodeCache) { |
1865 before_exit(JavaThread::current()); | |
1866 exit_globals(); // will delete tty | |
1867 vm_direct_exit(CompileTheWorld ? 0 : 1); | |
1868 } | |
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1869 #endif |
1202 | 1870 if (UseCodeCacheFlushing) { |
1871 NMethodSweeper::handle_full_code_cache(true); | |
1872 } else { | |
1873 UseCompiler = false; | |
1874 AlwaysCompileLoopMethods = false; | |
1875 } | |
1876 } | |
1877 } | |
1878 | |
1879 // ------------------------------------------------------------------ | |
0 | 1880 // CompileBroker::set_last_compile |
1881 // | |
1882 // Record this compilation for debugging purposes. | |
1883 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { | |
1884 ResourceMark rm; | |
1885 char* method_name = method->name()->as_C_string(); | |
1886 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); | |
1887 char current_method[CompilerCounters::cmname_buffer_length]; | |
1888 size_t maxLen = CompilerCounters::cmname_buffer_length; | |
1889 | |
1890 if (UsePerfData) { | |
1891 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); | |
1892 | |
1893 size_t s1len = strlen(class_name); | |
1894 size_t s2len = strlen(method_name); | |
1895 | |
1896 // check if we need to truncate the string | |
1897 if (s1len + s2len + 2 > maxLen) { | |
1898 | |
1899 // the strategy is to lop off the leading characters of the | |
1900 // class name and the trailing characters of the method name. | |
1901 | |
1902 if (s2len + 2 > maxLen) { | |
1903 // lop of the entire class name string, let snprintf handle | |
1904 // truncation of the method name. | |
1905 class_name += s1len; // null string | |
1906 } | |
1907 else { | |
1908 // lop off the extra characters from the front of the class name | |
1909 class_name += ((s1len + s2len + 2) - maxLen); | |
1910 } | |
1911 } | |
1912 | |
1913 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); | |
1914 } | |
1915 | |
1916 if (CICountOSR && is_osr) { | |
1917 _last_compile_type = osr_compile; | |
1918 } else { | |
1919 _last_compile_type = normal_compile; | |
1920 } | |
1921 _last_compile_level = comp_level; | |
1922 | |
1923 if (UsePerfData) { | |
1924 CompilerCounters* counters = thread->counters(); | |
1925 counters->set_current_method(current_method); | |
1926 counters->set_compile_type((jlong)_last_compile_type); | |
1927 } | |
1928 } | |
1929 | |
1930 | |
1931 // ------------------------------------------------------------------ | |
1932 // CompileBroker::push_jni_handle_block | |
1933 // | |
1934 // Push on a new block of JNI handles. | |
1935 void CompileBroker::push_jni_handle_block() { | |
1936 JavaThread* thread = JavaThread::current(); | |
1937 | |
1938 // Allocate a new block for JNI handles. | |
1939 // Inlined code from jni_PushLocalFrame() | |
1940 JNIHandleBlock* java_handles = thread->active_handles(); | |
1941 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); | |
1942 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); | |
1943 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. | |
1944 thread->set_active_handles(compile_handles); | |
1945 } | |
1946 | |
1947 | |
1948 // ------------------------------------------------------------------ | |
1949 // CompileBroker::pop_jni_handle_block | |
1950 // | |
1951 // Pop off the current block of JNI handles. | |
1952 void CompileBroker::pop_jni_handle_block() { | |
1953 JavaThread* thread = JavaThread::current(); | |
1954 | |
1955 // Release our JNI handle block | |
1956 JNIHandleBlock* compile_handles = thread->active_handles(); | |
1957 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); | |
1958 thread->set_active_handles(java_handles); | |
1959 compile_handles->set_pop_frame_link(NULL); | |
1960 JNIHandleBlock::release_block(compile_handles, thread); // may block | |
1961 } | |
1962 | |
1963 | |
1964 // ------------------------------------------------------------------ | |
1965 // CompileBroker::check_break_at | |
1966 // | |
1967 // Should the compilation break at the current compilation. | |
1968 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { | |
1969 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { | |
1970 return true; | |
1971 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling | |
1972 return true; | |
1973 } else { | |
1974 return (compile_id == CIBreakAt); | |
1975 } | |
1976 } | |
1977 | |
1978 // ------------------------------------------------------------------ | |
1979 // CompileBroker::collect_statistics | |
1980 // | |
1981 // Collect statistics about the compilation. | |
1982 | |
1983 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { | |
1984 bool success = task->is_success(); | |
1985 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); | |
1986 uint compile_id = task->compile_id(); | |
1987 bool is_osr = (task->osr_bci() != standard_entry_bci); | |
1988 nmethod* code = task->code(); | |
1989 CompilerCounters* counters = thread->counters(); | |
1990 | |
1991 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); | |
1992 MutexLocker locker(CompileStatistics_lock); | |
1993 | |
1994 // _perf variables are production performance counters which are | |
1995 // updated regardless of the setting of the CITime and CITimeEach flags | |
1996 // | |
1997 if (!success) { | |
1998 _total_bailout_count++; | |
1999 if (UsePerfData) { | |
2000 _perf_last_failed_method->set_value(counters->current_method()); | |
2001 _perf_last_failed_type->set_value(counters->compile_type()); | |
2002 _perf_total_bailout_count->inc(); | |
2003 } | |
2004 } else if (code == NULL) { | |
2005 if (UsePerfData) { | |
2006 _perf_last_invalidated_method->set_value(counters->current_method()); | |
2007 _perf_last_invalidated_type->set_value(counters->compile_type()); | |
2008 _perf_total_invalidated_count->inc(); | |
2009 } | |
2010 _total_invalidated_count++; | |
2011 } else { | |
2012 // Compilation succeeded | |
2013 | |
2014 // update compilation ticks - used by the implementation of | |
2015 // java.lang.management.CompilationMBean | |
2016 _perf_total_compilation->inc(time.ticks()); | |
2017 | |
2018 if (CITime) { | |
2019 _t_total_compilation.add(time); | |
2020 if (is_osr) { | |
2021 _t_osr_compilation.add(time); | |
2022 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
2023 } else { | |
2024 _t_standard_compilation.add(time); | |
2025 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
2026 } | |
2027 } | |
2028 | |
2029 if (UsePerfData) { | |
2030 // save the name of the last method compiled | |
2031 _perf_last_method->set_value(counters->current_method()); | |
2032 _perf_last_compile_type->set_value(counters->compile_type()); | |
2033 _perf_last_compile_size->set_value(method->code_size() + | |
2034 task->num_inlined_bytecodes()); | |
2035 if (is_osr) { | |
2036 _perf_osr_compilation->inc(time.ticks()); | |
2037 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
2038 } else { | |
2039 _perf_standard_compilation->inc(time.ticks()); | |
2040 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
2041 } | |
2042 } | |
2043 | |
2044 if (CITimeEach) { | |
2045 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); | |
2046 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", | |
2047 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); | |
2048 } | |
2049 | |
2050 // Collect counts of successful compilations | |
1748 | 2051 _sum_nmethod_size += code->total_size(); |
2052 _sum_nmethod_code_size += code->insts_size(); | |
0 | 2053 _total_compile_count++; |
2054 | |
2055 if (UsePerfData) { | |
1748 | 2056 _perf_sum_nmethod_size->inc( code->total_size()); |
2057 _perf_sum_nmethod_code_size->inc(code->insts_size()); | |
0 | 2058 _perf_total_compile_count->inc(); |
2059 } | |
2060 | |
2061 if (is_osr) { | |
2062 if (UsePerfData) _perf_total_osr_compile_count->inc(); | |
2063 _total_osr_compile_count++; | |
2064 } else { | |
2065 if (UsePerfData) _perf_total_standard_compile_count->inc(); | |
2066 _total_standard_compile_count++; | |
2067 } | |
2068 } | |
2069 // set the current method for the thread to null | |
2070 if (UsePerfData) counters->set_current_method(""); | |
2071 } | |
2072 | |
2073 | |
2074 | |
2075 void CompileBroker::print_times() { | |
2076 tty->cr(); | |
2077 tty->print_cr("Accumulated compiler times (for compiled methods only)"); | |
2078 tty->print_cr("------------------------------------------------"); | |
2079 //0000000000111111111122222222223333333333444444444455555555556666666666 | |
2080 //0123456789012345678901234567890123456789012345678901234567890123456789 | |
2081 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); | |
2082 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", | |
2083 CompileBroker::_t_standard_compilation.seconds(), | |
2084 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); | |
2085 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 | 2086 |
1783 | 2087 if (compiler(CompLevel_simple) != NULL) { |
2088 compiler(CompLevel_simple)->print_timers(); | |
0 | 2089 } |
1783 | 2090 if (compiler(CompLevel_full_optimization) != NULL) { |
2091 compiler(CompLevel_full_optimization)->print_timers(); | |
2092 } | |
0 | 2093 tty->cr(); |
2094 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; | |
2095 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); | |
2096 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); | |
2097 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); | |
2098 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); | |
2099 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); | |
2100 tty->cr(); | |
2101 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); | |
2102 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); | |
2103 } | |
2104 | |
2105 | |
2106 // Debugging output for failure | |
2107 void CompileBroker::print_last_compile() { | |
2108 if ( _last_compile_level != CompLevel_none && | |
2109 compiler(_last_compile_level) != NULL && | |
2110 _last_method_compiled != NULL && | |
2111 _last_compile_type != no_compile) { | |
2112 if (_last_compile_type == osr_compile) { | |
2113 tty->print_cr("Last parse: [osr]%d+++(%d) %s", | |
2114 _osr_compilation_id, _last_compile_level, _last_method_compiled); | |
2115 } else { | |
2116 tty->print_cr("Last parse: %d+++(%d) %s", | |
2117 _compilation_id, _last_compile_level, _last_method_compiled); | |
2118 } | |
2119 } | |
2120 } | |
2121 | |
2122 | |
2123 void CompileBroker::print_compiler_threads_on(outputStream* st) { | |
2124 #ifndef PRODUCT | |
2125 st->print_cr("Compiler thread printing unimplemented."); | |
2126 st->cr(); | |
2127 #endif | |
2128 } |