Mercurial > hg > graal-compiler
annotate src/share/vm/compiler/compileBroker.cpp @ 7168:73e64867adb7
8003690: Example code in JVMTI GetStackTrace documentation is broken
Summary: Fixed to minor errors in example code
Reviewed-by: sspitsyn, dholmes
author | mikael |
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date | Wed, 21 Nov 2012 09:02:13 -0800 |
parents | 18fb7da42534 |
children | e522a00b91aa 90273fc0a981 |
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" | |
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34 #include "oops/methodData.hpp" |
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35 #include "oops/method.hpp" |
1972 | 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 sstr = lm.stream(); |
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201 // msg.time_stamp().update_to(tty->time_stamp().ticks()); |
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202 task->print_compilation(&sstr, NULL, true); |
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203 log(thread, "%s", (const char*)lm); |
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204 } |
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205 |
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206 void log_nmethod(JavaThread* thread, nmethod* nm) { |
4944 | 207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
208 nm->compile_id(), nm->is_osr_method() ? "%" : "", | |
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209 nm, nm->code_begin(), nm->code_end()); |
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210 } |
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211 |
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212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { |
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213 StringLogMessage lm; |
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214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); |
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215 if (retry_message != NULL) { |
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216 lm.append(" (%s)", retry_message); |
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217 } |
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218 lm.print("\n"); |
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219 log(thread, "%s", (const char*)lm); |
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220 } |
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221 }; |
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222 |
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223 static CompilationLog* _compilation_log = NULL; |
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224 |
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225 void compileBroker_init() { |
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226 if (LogEvents) { |
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227 _compilation_log = new CompilationLog(); |
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228 } |
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229 } |
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230 |
0 | 231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { |
232 CompilerThread* thread = CompilerThread::current(); | |
233 thread->set_task(task); | |
234 CompileLog* log = thread->log(); | |
235 if (log != NULL) task->log_task_start(log); | |
236 } | |
237 | |
238 CompileTaskWrapper::~CompileTaskWrapper() { | |
239 CompilerThread* thread = CompilerThread::current(); | |
240 CompileTask* task = thread->task(); | |
241 CompileLog* log = thread->log(); | |
242 if (log != NULL) task->log_task_done(log); | |
243 thread->set_task(NULL); | |
244 task->set_code_handle(NULL); | |
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245 thread->set_env(NULL); |
0 | 246 if (task->is_blocking()) { |
247 MutexLocker notifier(task->lock(), thread); | |
248 task->mark_complete(); | |
249 // Notify the waiting thread that the compilation has completed. | |
250 task->lock()->notify_all(); | |
251 } else { | |
252 task->mark_complete(); | |
253 | |
254 // By convention, the compiling thread is responsible for | |
255 // recycling a non-blocking CompileTask. | |
256 CompileBroker::free_task(task); | |
257 } | |
258 } | |
259 | |
260 | |
261 // ------------------------------------------------------------------ | |
262 // CompileTask::initialize | |
263 void CompileTask::initialize(int compile_id, | |
264 methodHandle method, | |
265 int osr_bci, | |
266 int comp_level, | |
267 methodHandle hot_method, | |
268 int hot_count, | |
269 const char* comment, | |
270 bool is_blocking) { | |
271 assert(!_lock->is_locked(), "bad locking"); | |
272 | |
273 _compile_id = compile_id; | |
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274 _method = method(); |
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275 _method_loader = JNIHandles::make_global(_method->method_holder()->class_loader()); |
0 | 276 _osr_bci = osr_bci; |
277 _is_blocking = is_blocking; | |
278 _comp_level = comp_level; | |
279 _num_inlined_bytecodes = 0; | |
280 | |
281 _is_complete = false; | |
282 _is_success = false; | |
283 _code_handle = NULL; | |
284 | |
285 _hot_method = NULL; | |
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286 _hot_method_loader = NULL; |
0 | 287 _hot_count = hot_count; |
288 _time_queued = 0; // tidy | |
289 _comment = comment; | |
290 | |
291 if (LogCompilation) { | |
292 _time_queued = os::elapsed_counter(); | |
293 if (hot_method.not_null()) { | |
294 if (hot_method == method) { | |
295 _hot_method = _method; | |
296 } else { | |
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297 _hot_method = hot_method(); |
0 | 298 } |
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299 _hot_method_loader = JNIHandles::make_global(_hot_method->method_holder()->class_loader()); |
0 | 300 } |
301 } | |
302 | |
303 _next = NULL; | |
304 } | |
305 | |
306 // ------------------------------------------------------------------ | |
307 // CompileTask::code/set_code | |
308 nmethod* CompileTask::code() const { | |
309 if (_code_handle == NULL) return NULL; | |
310 return _code_handle->code(); | |
311 } | |
312 void CompileTask::set_code(nmethod* nm) { | |
313 if (_code_handle == NULL && nm == NULL) return; | |
314 guarantee(_code_handle != NULL, ""); | |
315 _code_handle->set_code(nm); | |
316 if (nm == NULL) _code_handle = NULL; // drop the handle also | |
317 } | |
318 | |
319 // ------------------------------------------------------------------ | |
320 // CompileTask::free | |
321 void CompileTask::free() { | |
322 set_code(NULL); | |
323 assert(!_lock->is_locked(), "Should not be locked when freed"); | |
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324 JNIHandles::destroy_global(_method_loader); |
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325 JNIHandles::destroy_global(_hot_method_loader); |
0 | 326 } |
327 | |
328 | |
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329 void CompileTask::mark_on_stack() { |
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330 // Mark these methods as something redefine classes cannot remove. |
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331 _method->set_on_stack(true); |
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332 if (_hot_method != NULL) { |
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333 _hot_method->set_on_stack(true); |
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334 } |
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335 } |
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336 |
0 | 337 // ------------------------------------------------------------------ |
338 // CompileTask::print | |
339 void CompileTask::print() { | |
340 tty->print("<CompileTask compile_id=%d ", _compile_id); | |
341 tty->print("method="); | |
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342 _method->print_name(tty); |
0 | 343 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", |
344 _osr_bci, bool_to_str(_is_blocking), | |
345 bool_to_str(_is_complete), bool_to_str(_is_success)); | |
346 } | |
347 | |
1783 | 348 |
0 | 349 // ------------------------------------------------------------------ |
350 // CompileTask::print_line_on_error | |
351 // | |
352 // This function is called by fatal error handler when the thread | |
353 // causing troubles is a compiler thread. | |
354 // | |
355 // Do not grab any lock, do not allocate memory. | |
356 // | |
357 // Otherwise it's the same as CompileTask::print_line() | |
358 // | |
359 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { | |
360 // print compiler name | |
361 st->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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362 print_compilation(st); |
0 | 363 } |
364 | |
365 // ------------------------------------------------------------------ | |
366 // CompileTask::print_line | |
367 void CompileTask::print_line() { | |
368 ttyLocker ttyl; // keep the following output all in one block | |
369 // print compiler name if requested | |
370 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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371 print_compilation(); |
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372 } |
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373 |
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374 |
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375 // ------------------------------------------------------------------ |
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376 // CompileTask::print_compilation_impl |
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377 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level, |
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378 bool is_osr_method, int osr_bci, bool is_blocking, |
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379 const char* msg, bool short_form) { |
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380 if (!short_form) { |
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381 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp |
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382 } |
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383 st->print("%4d ", compile_id); // print compilation number |
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384 |
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385 // For unloaded methods the transition to zombie occurs after the |
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386 // method is cleared so it's impossible to report accurate |
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387 // information for that case. |
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388 bool is_synchronized = false; |
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389 bool has_exception_handler = false; |
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390 bool is_native = false; |
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391 if (method != NULL) { |
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392 is_synchronized = method->is_synchronized(); |
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393 has_exception_handler = method->has_exception_handler(); |
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394 is_native = method->is_native(); |
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395 } |
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396 // method attributes |
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397 const char compile_type = is_osr_method ? '%' : ' '; |
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398 const char sync_char = is_synchronized ? 's' : ' '; |
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399 const char exception_char = has_exception_handler ? '!' : ' '; |
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400 const char blocking_char = is_blocking ? 'b' : ' '; |
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401 const char native_char = is_native ? 'n' : ' '; |
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402 |
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403 // print method attributes |
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404 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); |
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405 |
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406 if (TieredCompilation) { |
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407 if (comp_level != -1) st->print("%d ", comp_level); |
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408 else st->print("- "); |
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409 } |
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410 st->print(" "); // more indent |
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411 |
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412 if (method == NULL) { |
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413 st->print("(method)"); |
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414 } else { |
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415 method->print_short_name(st); |
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416 if (is_osr_method) { |
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417 st->print(" @ %d", osr_bci); |
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418 } |
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419 if (method->is_native()) |
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420 st->print(" (native)"); |
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421 else |
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422 st->print(" (%d bytes)", method->code_size()); |
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423 } |
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424 |
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425 if (msg != NULL) { |
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426 st->print(" %s", msg); |
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427 } |
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428 if (!short_form) { |
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429 st->cr(); |
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430 } |
0 | 431 } |
432 | |
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433 // ------------------------------------------------------------------ |
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434 // CompileTask::print_inlining |
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435 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { |
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436 // 1234567 |
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437 st->print(" "); // print timestamp |
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438 // 1234 |
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439 st->print(" "); // print compilation number |
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440 |
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441 // method attributes |
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442 if (method->is_loaded()) { |
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443 const char sync_char = method->is_synchronized() ? 's' : ' '; |
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444 const char exception_char = method->has_exception_handlers() ? '!' : ' '; |
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445 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; |
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446 |
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447 // print method attributes |
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448 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); |
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449 } else { |
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450 // %s!bn |
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451 st->print(" "); // print method attributes |
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452 } |
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453 |
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454 if (TieredCompilation) { |
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455 st->print(" "); |
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456 } |
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457 st->print(" "); // more indent |
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458 st->print(" "); // initial inlining indent |
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459 |
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460 for (int i = 0; i < inline_level; i++) st->print(" "); |
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461 |
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462 st->print("@ %d ", bci); // print bci |
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463 method->print_short_name(st); |
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464 if (method->is_loaded()) |
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465 st->print(" (%d bytes)", method->code_size()); |
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466 else |
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467 st->print(" (not loaded)"); |
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468 |
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469 if (msg != NULL) { |
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470 st->print(" %s", msg); |
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471 } |
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472 st->cr(); |
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473 } |
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474 |
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475 // ------------------------------------------------------------------ |
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476 // CompileTask::print_inline_indent |
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477 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { |
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478 // 1234567 |
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479 st->print(" "); // print timestamp |
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480 // 1234 |
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481 st->print(" "); // print compilation number |
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482 // %s!bn |
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483 st->print(" "); // print method attributes |
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484 if (TieredCompilation) { |
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485 st->print(" "); |
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486 } |
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487 st->print(" "); // more indent |
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488 st->print(" "); // initial inlining indent |
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489 for (int i = 0; i < inline_level; i++) st->print(" "); |
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490 } |
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491 |
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492 // ------------------------------------------------------------------ |
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493 // CompileTask::print_compilation |
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494 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) { |
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495 bool is_osr_method = osr_bci() != InvocationEntryBci; |
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496 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form); |
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497 } |
0 | 498 |
499 // ------------------------------------------------------------------ | |
500 // CompileTask::log_task | |
501 void CompileTask::log_task(xmlStream* log) { | |
502 Thread* thread = Thread::current(); | |
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503 methodHandle method(thread, this->method()); |
0 | 504 ResourceMark rm(thread); |
505 | |
506 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> | |
507 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); | |
508 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
509 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind | |
510 } // else compile_kind='c2c' | |
511 if (!method.is_null()) log->method(method); | |
512 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
513 log->print(" osr_bci='%d'", _osr_bci); | |
514 } | |
515 if (_comp_level != CompLevel_highest_tier) { | |
516 log->print(" level='%d'", _comp_level); | |
517 } | |
518 if (_is_blocking) { | |
519 log->print(" blocking='1'"); | |
520 } | |
521 log->stamp(); | |
522 } | |
523 | |
524 | |
525 // ------------------------------------------------------------------ | |
526 // CompileTask::log_task_queued | |
527 void CompileTask::log_task_queued() { | |
528 Thread* thread = Thread::current(); | |
529 ttyLocker ttyl; | |
530 ResourceMark rm(thread); | |
531 | |
532 xtty->begin_elem("task_queued"); | |
533 log_task(xtty); | |
534 if (_comment != NULL) { | |
535 xtty->print(" comment='%s'", _comment); | |
536 } | |
537 if (_hot_method != NULL) { | |
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538 methodHandle hot(thread, _hot_method); |
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539 methodHandle method(thread, _method); |
0 | 540 if (hot() != method()) { |
541 xtty->method(hot); | |
542 } | |
543 } | |
544 if (_hot_count != 0) { | |
545 xtty->print(" hot_count='%d'", _hot_count); | |
546 } | |
547 xtty->end_elem(); | |
548 } | |
549 | |
550 | |
551 // ------------------------------------------------------------------ | |
552 // CompileTask::log_task_start | |
553 void CompileTask::log_task_start(CompileLog* log) { | |
554 log->begin_head("task"); | |
555 log_task(log); | |
556 log->end_head(); | |
557 } | |
558 | |
559 | |
560 // ------------------------------------------------------------------ | |
561 // CompileTask::log_task_done | |
562 void CompileTask::log_task_done(CompileLog* log) { | |
563 Thread* thread = Thread::current(); | |
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564 methodHandle method(thread, this->method()); |
0 | 565 ResourceMark rm(thread); |
566 | |
567 // <task_done ... stamp='1.234'> </task> | |
568 nmethod* nm = code(); | |
569 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", | |
1748 | 570 _is_success, nm == NULL ? 0 : nm->content_size(), |
0 | 571 method->invocation_count()); |
572 int bec = method->backedge_count(); | |
573 if (bec != 0) log->print(" backedge_count='%d'", bec); | |
574 // Note: "_is_complete" is about to be set, but is not. | |
575 if (_num_inlined_bytecodes != 0) { | |
576 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); | |
577 } | |
578 log->stamp(); | |
579 log->end_elem(); | |
580 log->tail("task"); | |
581 log->clear_identities(); // next task will have different CI | |
582 if (log->unflushed_count() > 2000) { | |
583 log->flush(); | |
584 } | |
585 log->mark_file_end(); | |
586 } | |
587 | |
588 | |
589 | |
590 // ------------------------------------------------------------------ | |
591 // CompileQueue::add | |
592 // | |
593 // Add a CompileTask to a CompileQueue | |
594 void CompileQueue::add(CompileTask* task) { | |
595 assert(lock()->owned_by_self(), "must own lock"); | |
596 | |
597 task->set_next(NULL); | |
1783 | 598 task->set_prev(NULL); |
0 | 599 |
600 if (_last == NULL) { | |
601 // The compile queue is empty. | |
602 assert(_first == NULL, "queue is empty"); | |
603 _first = task; | |
604 _last = task; | |
605 } else { | |
606 // Append the task to the queue. | |
607 assert(_last->next() == NULL, "not last"); | |
608 _last->set_next(task); | |
1783 | 609 task->set_prev(_last); |
0 | 610 _last = task; |
611 } | |
1783 | 612 ++_size; |
0 | 613 |
614 // Mark the method as being in the compile queue. | |
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615 task->method()->set_queued_for_compilation(); |
0 | 616 |
617 if (CIPrintCompileQueue) { | |
618 print(); | |
619 } | |
620 | |
621 if (LogCompilation && xtty != NULL) { | |
622 task->log_task_queued(); | |
623 } | |
624 | |
625 // Notify CompilerThreads that a task is available. | |
1783 | 626 lock()->notify_all(); |
0 | 627 } |
628 | |
629 // ------------------------------------------------------------------ | |
630 // CompileQueue::get | |
631 // | |
632 // Get the next CompileTask from a CompileQueue | |
633 CompileTask* CompileQueue::get() { | |
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634 NMethodSweeper::possibly_sweep(); |
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635 |
0 | 636 MutexLocker locker(lock()); |
637 // Wait for an available CompileTask. | |
638 while (_first == NULL) { | |
639 // There is no work to be done right now. Wait. | |
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640 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { |
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641 // During the emergency sweeping periods, wake up and sweep occasionally |
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642 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); |
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643 if (timedout) { |
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644 MutexUnlocker ul(lock()); |
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645 // When otherwise not busy, run nmethod sweeping |
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646 NMethodSweeper::possibly_sweep(); |
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647 } |
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648 } else { |
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649 // During normal operation no need to wake up on timer |
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650 lock()->wait(); |
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651 } |
0 | 652 } |
1783 | 653 CompileTask* task = CompilationPolicy::policy()->select_task(this); |
654 remove(task); | |
655 return task; | |
656 } | |
0 | 657 |
1783 | 658 void CompileQueue::remove(CompileTask* task) |
659 { | |
660 assert(lock()->owned_by_self(), "must own lock"); | |
661 if (task->prev() != NULL) { | |
662 task->prev()->set_next(task->next()); | |
663 } else { | |
664 // max is the first element | |
665 assert(task == _first, "Sanity"); | |
666 _first = task->next(); | |
0 | 667 } |
668 | |
1783 | 669 if (task->next() != NULL) { |
670 task->next()->set_prev(task->prev()); | |
671 } else { | |
672 // max is the last element | |
673 assert(task == _last, "Sanity"); | |
674 _last = task->prev(); | |
675 } | |
676 --_size; | |
0 | 677 } |
678 | |
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679 // methods in the compile queue need to be marked as used on the stack |
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680 // so that they don't get reclaimed by Redefine Classes |
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681 void CompileQueue::mark_on_stack() { |
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682 CompileTask* task = _first; |
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683 while (task != NULL) { |
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684 task->mark_on_stack(); |
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685 task = task->next(); |
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686 } |
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687 } |
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688 |
0 | 689 // ------------------------------------------------------------------ |
690 // CompileQueue::print | |
691 void CompileQueue::print() { | |
692 tty->print_cr("Contents of %s", name()); | |
693 tty->print_cr("----------------------"); | |
694 CompileTask* task = _first; | |
695 while (task != NULL) { | |
696 task->print_line(); | |
697 task = task->next(); | |
698 } | |
699 tty->print_cr("----------------------"); | |
700 } | |
701 | |
702 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { | |
703 | |
704 _current_method[0] = '\0'; | |
705 _compile_type = CompileBroker::no_compile; | |
706 | |
707 if (UsePerfData) { | |
708 ResourceMark rm; | |
709 | |
710 // create the thread instance name space string - don't create an | |
711 // instance subspace if instance is -1 - keeps the adapterThread | |
712 // counters from having a ".0" namespace. | |
713 const char* thread_i = (instance == -1) ? thread_name : | |
714 PerfDataManager::name_space(thread_name, instance); | |
715 | |
716 | |
717 char* name = PerfDataManager::counter_name(thread_i, "method"); | |
718 _perf_current_method = | |
719 PerfDataManager::create_string_variable(SUN_CI, name, | |
720 cmname_buffer_length, | |
721 _current_method, CHECK); | |
722 | |
723 name = PerfDataManager::counter_name(thread_i, "type"); | |
724 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, | |
725 PerfData::U_None, | |
726 (jlong)_compile_type, | |
727 CHECK); | |
728 | |
729 name = PerfDataManager::counter_name(thread_i, "time"); | |
730 _perf_time = PerfDataManager::create_counter(SUN_CI, name, | |
731 PerfData::U_Ticks, CHECK); | |
732 | |
733 name = PerfDataManager::counter_name(thread_i, "compiles"); | |
734 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, | |
735 PerfData::U_Events, CHECK); | |
736 } | |
737 } | |
738 | |
739 // ------------------------------------------------------------------ | |
740 // CompileBroker::compilation_init | |
741 // | |
742 // Initialize the Compilation object | |
743 void CompileBroker::compilation_init() { | |
744 _last_method_compiled[0] = '\0'; | |
745 | |
1970 | 746 #ifndef SHARK |
0 | 747 // Set the interface to the current compiler(s). |
1783 | 748 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); |
749 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); | |
0 | 750 #ifdef COMPILER1 |
1783 | 751 if (c1_count > 0) { |
752 _compilers[0] = new Compiler(); | |
753 } | |
0 | 754 #endif // COMPILER1 |
755 | |
756 #ifdef COMPILER2 | |
1783 | 757 if (c2_count > 0) { |
758 _compilers[1] = new C2Compiler(); | |
759 } | |
0 | 760 #endif // COMPILER2 |
761 | |
1970 | 762 #else // SHARK |
763 int c1_count = 0; | |
764 int c2_count = 1; | |
765 | |
766 _compilers[1] = new SharkCompiler(); | |
767 #endif // SHARK | |
1692 | 768 |
0 | 769 // Initialize the CompileTask free list |
770 _task_free_list = NULL; | |
771 | |
772 // Start the CompilerThreads | |
1783 | 773 init_compiler_threads(c1_count, c2_count); |
0 | 774 // totalTime performance counter is always created as it is required |
775 // by the implementation of java.lang.management.CompilationMBean. | |
776 { | |
777 EXCEPTION_MARK; | |
778 _perf_total_compilation = | |
779 PerfDataManager::create_counter(JAVA_CI, "totalTime", | |
780 PerfData::U_Ticks, CHECK); | |
781 } | |
782 | |
783 | |
784 if (UsePerfData) { | |
785 | |
786 EXCEPTION_MARK; | |
787 | |
788 // create the jvmstat performance counters | |
789 _perf_osr_compilation = | |
790 PerfDataManager::create_counter(SUN_CI, "osrTime", | |
791 PerfData::U_Ticks, CHECK); | |
792 | |
793 _perf_standard_compilation = | |
794 PerfDataManager::create_counter(SUN_CI, "standardTime", | |
795 PerfData::U_Ticks, CHECK); | |
796 | |
797 _perf_total_bailout_count = | |
798 PerfDataManager::create_counter(SUN_CI, "totalBailouts", | |
799 PerfData::U_Events, CHECK); | |
800 | |
801 _perf_total_invalidated_count = | |
802 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", | |
803 PerfData::U_Events, CHECK); | |
804 | |
805 _perf_total_compile_count = | |
806 PerfDataManager::create_counter(SUN_CI, "totalCompiles", | |
807 PerfData::U_Events, CHECK); | |
808 _perf_total_osr_compile_count = | |
809 PerfDataManager::create_counter(SUN_CI, "osrCompiles", | |
810 PerfData::U_Events, CHECK); | |
811 | |
812 _perf_total_standard_compile_count = | |
813 PerfDataManager::create_counter(SUN_CI, "standardCompiles", | |
814 PerfData::U_Events, CHECK); | |
815 | |
816 _perf_sum_osr_bytes_compiled = | |
817 PerfDataManager::create_counter(SUN_CI, "osrBytes", | |
818 PerfData::U_Bytes, CHECK); | |
819 | |
820 _perf_sum_standard_bytes_compiled = | |
821 PerfDataManager::create_counter(SUN_CI, "standardBytes", | |
822 PerfData::U_Bytes, CHECK); | |
823 | |
824 _perf_sum_nmethod_size = | |
825 PerfDataManager::create_counter(SUN_CI, "nmethodSize", | |
826 PerfData::U_Bytes, CHECK); | |
827 | |
828 _perf_sum_nmethod_code_size = | |
829 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", | |
830 PerfData::U_Bytes, CHECK); | |
831 | |
832 _perf_last_method = | |
833 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", | |
834 CompilerCounters::cmname_buffer_length, | |
835 "", CHECK); | |
836 | |
837 _perf_last_failed_method = | |
838 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", | |
839 CompilerCounters::cmname_buffer_length, | |
840 "", CHECK); | |
841 | |
842 _perf_last_invalidated_method = | |
843 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", | |
844 CompilerCounters::cmname_buffer_length, | |
845 "", CHECK); | |
846 | |
847 _perf_last_compile_type = | |
848 PerfDataManager::create_variable(SUN_CI, "lastType", | |
849 PerfData::U_None, | |
850 (jlong)CompileBroker::no_compile, | |
851 CHECK); | |
852 | |
853 _perf_last_compile_size = | |
854 PerfDataManager::create_variable(SUN_CI, "lastSize", | |
855 PerfData::U_Bytes, | |
856 (jlong)CompileBroker::no_compile, | |
857 CHECK); | |
858 | |
859 | |
860 _perf_last_failed_type = | |
861 PerfDataManager::create_variable(SUN_CI, "lastFailedType", | |
862 PerfData::U_None, | |
863 (jlong)CompileBroker::no_compile, | |
864 CHECK); | |
865 | |
866 _perf_last_invalidated_type = | |
867 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", | |
868 PerfData::U_None, | |
869 (jlong)CompileBroker::no_compile, | |
870 CHECK); | |
871 } | |
872 | |
873 _initialized = true; | |
874 } | |
875 | |
876 | |
877 | |
878 // ------------------------------------------------------------------ | |
879 // CompileBroker::make_compiler_thread | |
880 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { | |
881 CompilerThread* compiler_thread = NULL; | |
882 | |
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883 Klass* k = |
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884 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), |
0 | 885 true, CHECK_0); |
886 instanceKlassHandle klass (THREAD, k); | |
887 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); | |
888 Handle string = java_lang_String::create_from_str(name, CHECK_0); | |
889 | |
890 // Initialize thread_oop to put it into the system threadGroup | |
891 Handle thread_group (THREAD, Universe::system_thread_group()); | |
892 JavaValue result(T_VOID); | |
893 JavaCalls::call_special(&result, thread_oop, | |
894 klass, | |
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895 vmSymbols::object_initializer_name(), |
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896 vmSymbols::threadgroup_string_void_signature(), |
0 | 897 thread_group, |
898 string, | |
899 CHECK_0); | |
900 | |
901 { | |
902 MutexLocker mu(Threads_lock, THREAD); | |
903 compiler_thread = new CompilerThread(queue, counters); | |
904 // At this point the new CompilerThread data-races with this startup | |
905 // thread (which I believe is the primoridal thread and NOT the VM | |
906 // thread). This means Java bytecodes being executed at startup can | |
907 // queue compile jobs which will run at whatever default priority the | |
908 // newly created CompilerThread runs at. | |
909 | |
910 | |
911 // At this point it may be possible that no osthread was created for the | |
912 // JavaThread due to lack of memory. We would have to throw an exception | |
913 // in that case. However, since this must work and we do not allow | |
914 // exceptions anyway, check and abort if this fails. | |
915 | |
916 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ | |
917 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
918 "unable to create new native thread"); | |
919 } | |
920 | |
921 java_lang_Thread::set_thread(thread_oop(), compiler_thread); | |
922 | |
923 // Note that this only sets the JavaThread _priority field, which by | |
924 // definition is limited to Java priorities and not OS priorities. | |
925 // The os-priority is set in the CompilerThread startup code itself | |
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926 |
0 | 927 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); |
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928 |
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929 // Note that we cannot call os::set_priority because it expects Java |
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930 // priorities and we are *explicitly* using OS priorities so that it's |
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931 // possible to set the compiler thread priority higher than any Java |
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932 // thread. |
0 | 933 |
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934 int native_prio = CompilerThreadPriority; |
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935 if (native_prio == -1) { |
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936 if (UseCriticalCompilerThreadPriority) { |
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937 native_prio = os::java_to_os_priority[CriticalPriority]; |
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938 } else { |
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939 native_prio = os::java_to_os_priority[NearMaxPriority]; |
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940 } |
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941 } |
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942 os::set_native_priority(compiler_thread, native_prio); |
0 | 943 |
944 java_lang_Thread::set_daemon(thread_oop()); | |
945 | |
946 compiler_thread->set_threadObj(thread_oop()); | |
947 Threads::add(compiler_thread); | |
948 Thread::start(compiler_thread); | |
949 } | |
4854
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950 |
0 | 951 // Let go of Threads_lock before yielding |
952 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) | |
953 | |
954 return compiler_thread; | |
955 } | |
956 | |
957 | |
958 // ------------------------------------------------------------------ | |
959 // CompileBroker::init_compiler_threads | |
960 // | |
961 // Initialize the compilation queue | |
1783 | 962 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { |
0 | 963 EXCEPTION_MARK; |
2447 | 964 #if !defined(ZERO) && !defined(SHARK) |
1783 | 965 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); |
2447 | 966 #endif // !ZERO && !SHARK |
1783 | 967 if (c2_compiler_count > 0) { |
968 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); | |
969 } | |
970 if (c1_compiler_count > 0) { | |
971 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); | |
972 } | |
0 | 973 |
1783 | 974 int compiler_count = c1_compiler_count + c2_compiler_count; |
975 | |
0 | 976 _method_threads = |
6197 | 977 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true); |
0 | 978 |
979 char name_buffer[256]; | |
1783 | 980 for (int i = 0; i < c2_compiler_count; i++) { |
0 | 981 // Create a name for our thread. |
1783 | 982 sprintf(name_buffer, "C2 CompilerThread%d", i); |
0 | 983 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); |
1783 | 984 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); |
0 | 985 _method_threads->append(new_thread); |
986 } | |
1783 | 987 |
988 for (int i = c2_compiler_count; i < compiler_count; i++) { | |
989 // Create a name for our thread. | |
990 sprintf(name_buffer, "C1 CompilerThread%d", i); | |
991 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); | |
992 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); | |
993 _method_threads->append(new_thread); | |
994 } | |
995 | |
0 | 996 if (UsePerfData) { |
997 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, | |
998 compiler_count, CHECK); | |
999 } | |
1000 } | |
1001 | |
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1002 |
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1003 // Set the methods on the stack as on_stack so that redefine classes doesn't |
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1004 // reclaim them |
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1005 void CompileBroker::mark_on_stack() { |
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1006 if (_c2_method_queue != NULL) { |
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1007 _c2_method_queue->mark_on_stack(); |
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1008 } |
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1009 if (_c1_method_queue != NULL) { |
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1010 _c1_method_queue->mark_on_stack(); |
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1011 } |
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1012 } |
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1013 |
0 | 1014 // ------------------------------------------------------------------ |
1015 // CompileBroker::is_idle | |
1016 bool CompileBroker::is_idle() { | |
1783 | 1017 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { |
1018 return false; | |
1019 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { | |
0 | 1020 return false; |
1021 } else { | |
1022 int num_threads = _method_threads->length(); | |
1023 for (int i=0; i<num_threads; i++) { | |
1024 if (_method_threads->at(i)->task() != NULL) { | |
1025 return false; | |
1026 } | |
1027 } | |
1028 | |
1029 // No pending or active compilations. | |
1030 return true; | |
1031 } | |
1032 } | |
1033 | |
1034 | |
1035 // ------------------------------------------------------------------ | |
1036 // CompileBroker::compile_method | |
1037 // | |
1038 // Request compilation of a method. | |
1039 void CompileBroker::compile_method_base(methodHandle method, | |
1040 int osr_bci, | |
1041 int comp_level, | |
1042 methodHandle hot_method, | |
1043 int hot_count, | |
1044 const char* comment, | |
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1045 Thread* thread) { |
0 | 1046 // do nothing if compiler thread(s) is not available |
1047 if (!_initialized ) { | |
1048 return; | |
1049 } | |
1050 | |
1051 guarantee(!method->is_abstract(), "cannot compile abstract methods"); | |
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1052 assert(method->method_holder()->oop_is_instance(), |
0 | 1053 "sanity check"); |
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1054 assert(!method->method_holder()->is_not_initialized(), |
0 | 1055 "method holder must be initialized"); |
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1056 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); |
0 | 1057 |
1058 if (CIPrintRequests) { | |
1059 tty->print("request: "); | |
1060 method->print_short_name(tty); | |
1061 if (osr_bci != InvocationEntryBci) { | |
1062 tty->print(" osr_bci: %d", osr_bci); | |
1063 } | |
1064 tty->print(" comment: %s count: %d", comment, hot_count); | |
1065 if (!hot_method.is_null()) { | |
1066 tty->print(" hot: "); | |
1067 if (hot_method() != method()) { | |
1068 hot_method->print_short_name(tty); | |
1069 } else { | |
1070 tty->print("yes"); | |
1071 } | |
1072 } | |
1073 tty->cr(); | |
1074 } | |
1075 | |
1076 // A request has been made for compilation. Before we do any | |
1077 // real work, check to see if the method has been compiled | |
1078 // in the meantime with a definitive result. | |
1079 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1080 return; | |
1081 } | |
1082 | |
2403 | 1083 #ifndef PRODUCT |
1084 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { | |
1085 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { | |
1086 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. | |
1087 return; | |
1088 } | |
1089 } | |
1090 #endif | |
1783 | 1091 |
0 | 1092 // If this method is already in the compile queue, then |
1093 // we do not block the current thread. | |
1094 if (compilation_is_in_queue(method, osr_bci)) { | |
1095 // We may want to decay our counter a bit here to prevent | |
1096 // multiple denied requests for compilation. This is an | |
1097 // open compilation policy issue. Note: The other possibility, | |
1098 // in the case that this is a blocking compile request, is to have | |
1099 // all subsequent blocking requesters wait for completion of | |
1100 // ongoing compiles. Note that in this case we'll need a protocol | |
1101 // for freeing the associated compile tasks. [Or we could have | |
1102 // a single static monitor on which all these waiters sleep.] | |
1103 return; | |
1104 } | |
1105 | |
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1106 // If the requesting thread is holding the pending list lock |
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1107 // then we just return. We can't risk blocking while holding |
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1108 // the pending list lock or a 3-way deadlock may occur |
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1109 // between the reference handler thread, a GC (instigated |
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1110 // by a compiler thread), and compiled method registration. |
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1111 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) { |
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1112 return; |
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1113 } |
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1114 |
0 | 1115 // Outputs from the following MutexLocker block: |
1116 CompileTask* task = NULL; | |
1117 bool blocking = false; | |
1783 | 1118 CompileQueue* queue = compile_queue(comp_level); |
0 | 1119 |
1120 // Acquire our lock. | |
1121 { | |
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1122 MutexLocker locker(queue->lock(), thread); |
0 | 1123 |
1124 // Make sure the method has not slipped into the queues since | |
1125 // last we checked; note that those checks were "fast bail-outs". | |
1126 // Here we need to be more careful, see 14012000 below. | |
1127 if (compilation_is_in_queue(method, osr_bci)) { | |
1128 return; | |
1129 } | |
1130 | |
1131 // We need to check again to see if the compilation has | |
1132 // completed. A previous compilation may have registered | |
1133 // some result. | |
1134 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1135 return; | |
1136 } | |
1137 | |
1138 // We now know that this compilation is not pending, complete, | |
1139 // or prohibited. Assign a compile_id to this compilation | |
1140 // and check to see if it is in our [Start..Stop) range. | |
1141 uint compile_id = assign_compile_id(method, osr_bci); | |
1142 if (compile_id == 0) { | |
1143 // The compilation falls outside the allowed range. | |
1144 return; | |
1145 } | |
1146 | |
1147 // Should this thread wait for completion of the compile? | |
1148 blocking = is_compile_blocking(method, osr_bci); | |
1149 | |
1150 // We will enter the compilation in the queue. | |
1151 // 14012000: Note that this sets the queued_for_compile bits in | |
1152 // the target method. We can now reason that a method cannot be | |
1153 // queued for compilation more than once, as follows: | |
1154 // Before a thread queues a task for compilation, it first acquires | |
1155 // the compile queue lock, then checks if the method's queued bits | |
1156 // are set or it has already been compiled. Thus there can not be two | |
1157 // instances of a compilation task for the same method on the | |
1158 // compilation queue. Consider now the case where the compilation | |
1159 // thread has already removed a task for that method from the queue | |
1160 // and is in the midst of compiling it. In this case, the | |
1161 // queued_for_compile bits must be set in the method (and these | |
1162 // will be visible to the current thread, since the bits were set | |
1163 // under protection of the compile queue lock, which we hold now. | |
1164 // When the compilation completes, the compiler thread first sets | |
1165 // the compilation result and then clears the queued_for_compile | |
1166 // bits. Neither of these actions are protected by a barrier (or done | |
1167 // under the protection of a lock), so the only guarantee we have | |
1168 // (on machines with TSO (Total Store Order)) is that these values | |
1169 // will update in that order. As a result, the only combinations of | |
1170 // these bits that the current thread will see are, in temporal order: | |
1171 // <RESULT, QUEUE> : | |
1172 // <0, 1> : in compile queue, but not yet compiled | |
1173 // <1, 1> : compiled but queue bit not cleared | |
1174 // <1, 0> : compiled and queue bit cleared | |
1175 // Because we first check the queue bits then check the result bits, | |
1176 // we are assured that we cannot introduce a duplicate task. | |
1177 // Note that if we did the tests in the reverse order (i.e. check | |
1178 // result then check queued bit), we could get the result bit before | |
1179 // the compilation completed, and the queue bit after the compilation | |
1180 // completed, and end up introducing a "duplicate" (redundant) task. | |
1181 // In that case, the compiler thread should first check if a method | |
1182 // has already been compiled before trying to compile it. | |
1183 // NOTE: in the event that there are multiple compiler threads and | |
1184 // there is de-optimization/recompilation, things will get hairy, | |
1185 // and in that case it's best to protect both the testing (here) of | |
1186 // these bits, and their updating (here and elsewhere) under a | |
1187 // common lock. | |
1783 | 1188 task = create_compile_task(queue, |
0 | 1189 compile_id, method, |
1190 osr_bci, comp_level, | |
1191 hot_method, hot_count, comment, | |
1192 blocking); | |
1193 } | |
1194 | |
1195 if (blocking) { | |
1196 wait_for_completion(task); | |
1197 } | |
1198 } | |
1199 | |
1200 | |
1201 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, | |
1783 | 1202 int comp_level, |
0 | 1203 methodHandle hot_method, int hot_count, |
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1204 const char* comment, Thread* THREAD) { |
0 | 1205 // make sure arguments make sense |
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1206 assert(method->method_holder()->oop_is_instance(), "not an instance method"); |
0 | 1207 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); |
1208 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); | |
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1209 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); |
0 | 1210 |
1783 | 1211 if (!TieredCompilation) { |
1212 comp_level = CompLevel_highest_tier; | |
0 | 1213 } |
1214 | |
1215 // return quickly if possible | |
1216 | |
1217 // lock, make sure that the compilation | |
1218 // isn't prohibited in a straightforward way. | |
1219 | |
1220 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { | |
1221 return NULL; | |
1222 } | |
1223 | |
1224 if (osr_bci == InvocationEntryBci) { | |
1225 // standard compilation | |
1226 nmethod* method_code = method->code(); | |
1783 | 1227 if (method_code != NULL) { |
1228 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1229 return method_code; | |
1230 } | |
0 | 1231 } |
1232 if (method->is_not_compilable(comp_level)) return NULL; | |
1202 | 1233 |
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1234 if (UseCodeCacheFlushing) { |
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1235 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); |
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1236 if (saved != NULL) { |
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1237 method->set_code(method, saved); |
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1238 return saved; |
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1239 } |
1202 | 1240 } |
1241 | |
0 | 1242 } else { |
1243 // osr compilation | |
1244 #ifndef TIERED | |
1245 // seems like an assert of dubious value | |
1783 | 1246 assert(comp_level == CompLevel_highest_tier, |
0 | 1247 "all OSR compiles are assumed to be at a single compilation lavel"); |
1248 #endif // TIERED | |
1783 | 1249 // We accept a higher level osr method |
1250 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1251 if (nm != NULL) return nm; |
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1252 if (method->is_not_osr_compilable(comp_level)) return NULL; |
0 | 1253 } |
1254 | |
1255 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); | |
1256 // some prerequisites that are compiler specific | |
2447 | 1257 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) { |
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1258 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); |
0 | 1259 // Resolve all classes seen in the signature of the method |
1260 // we are compiling. | |
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1261 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); |
0 | 1262 } |
1263 | |
1264 // If the method is native, do the lookup in the thread requesting | |
1265 // the compilation. Native lookups can load code, which is not | |
1266 // permitted during compilation. | |
1267 // | |
1268 // Note: A native method implies non-osr compilation which is | |
1269 // checked with an assertion at the entry of this method. | |
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1270 if (method->is_native() && !method->is_method_handle_intrinsic()) { |
0 | 1271 bool in_base_library; |
1272 address adr = NativeLookup::lookup(method, in_base_library, THREAD); | |
1273 if (HAS_PENDING_EXCEPTION) { | |
1274 // In case of an exception looking up the method, we just forget | |
1275 // about it. The interpreter will kick-in and throw the exception. | |
1276 method->set_not_compilable(); // implies is_not_osr_compilable() | |
1277 CLEAR_PENDING_EXCEPTION; | |
1278 return NULL; | |
1279 } | |
1280 assert(method->has_native_function(), "must have native code by now"); | |
1281 } | |
1282 | |
1283 // RedefineClasses() has replaced this method; just return | |
1284 if (method->is_old()) { | |
1285 return NULL; | |
1286 } | |
1287 | |
1288 // JVMTI -- post_compile_event requires jmethod_id() that may require | |
1289 // a lock the compiling thread can not acquire. Prefetch it here. | |
1290 if (JvmtiExport::should_post_compiled_method_load()) { | |
1291 method->jmethod_id(); | |
1292 } | |
1293 | |
1202 | 1294 // If the compiler is shut off due to code cache flushing or otherwise, |
1295 // fail out now so blocking compiles dont hang the java thread | |
1296 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { | |
1783 | 1297 CompilationPolicy::policy()->delay_compilation(method()); |
1202 | 1298 return NULL; |
1299 } | |
1300 | |
0 | 1301 // do the compilation |
1302 if (method->is_native()) { | |
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1303 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { |
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1304 // Acquire our lock. |
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1305 int compile_id; |
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1306 { |
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1307 MutexLocker locker(MethodCompileQueue_lock, THREAD); |
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1308 compile_id = assign_compile_id(method, standard_entry_bci); |
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1309 } |
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1310 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id); |
0 | 1311 } else { |
1312 return NULL; | |
1313 } | |
1314 } else { | |
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1315 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD); |
0 | 1316 } |
1317 | |
1318 // return requested nmethod | |
1783 | 1319 // We accept a higher level osr method |
1320 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1321 } |
1322 | |
1323 | |
1324 // ------------------------------------------------------------------ | |
1325 // CompileBroker::compilation_is_complete | |
1326 // | |
1327 // See if compilation of this method is already complete. | |
1328 bool CompileBroker::compilation_is_complete(methodHandle method, | |
1329 int osr_bci, | |
1330 int comp_level) { | |
1331 bool is_osr = (osr_bci != standard_entry_bci); | |
1332 if (is_osr) { | |
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1333 if (method->is_not_osr_compilable(comp_level)) { |
0 | 1334 return true; |
1335 } else { | |
1783 | 1336 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
0 | 1337 return (result != NULL); |
1338 } | |
1339 } else { | |
1340 if (method->is_not_compilable(comp_level)) { | |
1341 return true; | |
1342 } else { | |
1343 nmethod* result = method->code(); | |
1344 if (result == NULL) return false; | |
1783 | 1345 return comp_level == result->comp_level(); |
0 | 1346 } |
1347 } | |
1348 } | |
1349 | |
1350 | |
1351 // ------------------------------------------------------------------ | |
1352 // CompileBroker::compilation_is_in_queue | |
1353 // | |
1354 // See if this compilation is already requested. | |
1355 // | |
1356 // Implementation note: there is only a single "is in queue" bit | |
1357 // for each method. This means that the check below is overly | |
1358 // conservative in the sense that an osr compilation in the queue | |
1359 // will block a normal compilation from entering the queue (and vice | |
1360 // versa). This can be remedied by a full queue search to disambiguate | |
1361 // cases. If it is deemed profitible, this may be done. | |
1362 bool CompileBroker::compilation_is_in_queue(methodHandle method, | |
1783 | 1363 int osr_bci) { |
0 | 1364 return method->queued_for_compilation(); |
1365 } | |
1366 | |
1367 // ------------------------------------------------------------------ | |
1368 // CompileBroker::compilation_is_prohibited | |
1369 // | |
1370 // See if this compilation is not allowed. | |
1371 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { | |
1372 bool is_native = method->is_native(); | |
1373 // Some compilers may not support the compilation of natives. | |
1374 if (is_native && | |
1375 (!CICompileNatives || !compiler(comp_level)->supports_native())) { | |
1783 | 1376 method->set_not_compilable_quietly(comp_level); |
0 | 1377 return true; |
1378 } | |
1379 | |
1380 bool is_osr = (osr_bci != standard_entry_bci); | |
1381 // Some compilers may not support on stack replacement. | |
1382 if (is_osr && | |
1383 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { | |
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1384 method->set_not_osr_compilable(comp_level); |
0 | 1385 return true; |
1386 } | |
1387 | |
1388 // The method may be explicitly excluded by the user. | |
1389 bool quietly; | |
1390 if (CompilerOracle::should_exclude(method, quietly)) { | |
1391 if (!quietly) { | |
1392 // This does not happen quietly... | |
1393 ResourceMark rm; | |
1394 tty->print("### Excluding %s:%s", | |
1395 method->is_native() ? "generation of native wrapper" : "compile", | |
1396 (method->is_static() ? " static" : "")); | |
1397 method->print_short_name(tty); | |
1398 tty->cr(); | |
1399 } | |
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1400 method->set_not_compilable_quietly(); |
0 | 1401 } |
1402 | |
1403 return false; | |
1404 } | |
1405 | |
1406 | |
1407 // ------------------------------------------------------------------ | |
1408 // CompileBroker::assign_compile_id | |
1409 // | |
1410 // Assign a serialized id number to this compilation request. If the | |
1411 // number falls out of the allowed range, return a 0. OSR | |
1412 // compilations may be numbered separately from regular compilations | |
1413 // if certain debugging flags are used. | |
1414 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { | |
1783 | 1415 assert(MethodCompileQueue_lock->owner() == Thread::current(), |
0 | 1416 "must hold the compilation queue lock"); |
1417 bool is_osr = (osr_bci != standard_entry_bci); | |
1418 uint id; | |
1419 if (CICountOSR && is_osr) { | |
1420 id = ++_osr_compilation_id; | |
1421 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { | |
1422 return id; | |
1423 } | |
1424 } else { | |
1425 id = ++_compilation_id; | |
1426 if ((uint)CIStart <= id && id < (uint)CIStop) { | |
1427 return id; | |
1428 } | |
1429 } | |
1430 | |
1431 // Method was not in the appropriate compilation range. | |
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1432 method->set_not_compilable_quietly(); |
0 | 1433 return 0; |
1434 } | |
1435 | |
1436 | |
1437 // ------------------------------------------------------------------ | |
1438 // CompileBroker::is_compile_blocking | |
1439 // | |
1440 // Should the current thread be blocked until this compilation request | |
1441 // has been fulfilled? | |
1442 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { | |
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1443 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); |
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1444 return !BackgroundCompilation; |
0 | 1445 } |
1446 | |
1447 | |
1448 // ------------------------------------------------------------------ | |
1449 // CompileBroker::preload_classes | |
1450 void CompileBroker::preload_classes(methodHandle method, TRAPS) { | |
1451 // Move this code over from c1_Compiler.cpp | |
1452 ShouldNotReachHere(); | |
1453 } | |
1454 | |
1455 | |
1456 // ------------------------------------------------------------------ | |
1457 // CompileBroker::create_compile_task | |
1458 // | |
1459 // Create a CompileTask object representing the current request for | |
1460 // compilation. Add this task to the queue. | |
1461 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, | |
1462 int compile_id, | |
1463 methodHandle method, | |
1464 int osr_bci, | |
1465 int comp_level, | |
1466 methodHandle hot_method, | |
1467 int hot_count, | |
1468 const char* comment, | |
1469 bool blocking) { | |
1470 CompileTask* new_task = allocate_task(); | |
1471 new_task->initialize(compile_id, method, osr_bci, comp_level, | |
1472 hot_method, hot_count, comment, | |
1473 blocking); | |
1474 queue->add(new_task); | |
1475 return new_task; | |
1476 } | |
1477 | |
1478 | |
1479 // ------------------------------------------------------------------ | |
1480 // CompileBroker::allocate_task | |
1481 // | |
1482 // Allocate a CompileTask, from the free list if possible. | |
1483 CompileTask* CompileBroker::allocate_task() { | |
1484 MutexLocker locker(CompileTaskAlloc_lock); | |
1485 CompileTask* task = NULL; | |
1486 if (_task_free_list != NULL) { | |
1487 task = _task_free_list; | |
1488 _task_free_list = task->next(); | |
1489 task->set_next(NULL); | |
1490 } else { | |
1491 task = new CompileTask(); | |
1492 task->set_next(NULL); | |
1493 } | |
1494 return task; | |
1495 } | |
1496 | |
1497 | |
1498 // ------------------------------------------------------------------ | |
1499 // CompileBroker::free_task | |
1500 // | |
1501 // Add a task to the free list. | |
1502 void CompileBroker::free_task(CompileTask* task) { | |
1503 MutexLocker locker(CompileTaskAlloc_lock); | |
1504 task->free(); | |
1505 task->set_next(_task_free_list); | |
1506 _task_free_list = task; | |
1507 } | |
1508 | |
1509 | |
1510 // ------------------------------------------------------------------ | |
1511 // CompileBroker::wait_for_completion | |
1512 // | |
1513 // Wait for the given method CompileTask to complete. | |
1514 void CompileBroker::wait_for_completion(CompileTask* task) { | |
1515 if (CIPrintCompileQueue) { | |
1516 tty->print_cr("BLOCKING FOR COMPILE"); | |
1517 } | |
1518 | |
1519 assert(task->is_blocking(), "can only wait on blocking task"); | |
1520 | |
1521 JavaThread *thread = JavaThread::current(); | |
1522 thread->set_blocked_on_compilation(true); | |
1523 | |
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1524 methodHandle method(thread, task->method()); |
0 | 1525 { |
1526 MutexLocker waiter(task->lock(), thread); | |
1527 | |
1528 while (!task->is_complete()) | |
1529 task->lock()->wait(); | |
1530 } | |
1531 // It is harmless to check this status without the lock, because | |
1532 // completion is a stable property (until the task object is recycled). | |
1533 assert(task->is_complete(), "Compilation should have completed"); | |
1534 assert(task->code_handle() == NULL, "must be reset"); | |
1535 | |
1536 thread->set_blocked_on_compilation(false); | |
1537 | |
1538 // By convention, the waiter is responsible for recycling a | |
1539 // blocking CompileTask. Since there is only one waiter ever | |
1540 // waiting on a CompileTask, we know that no one else will | |
1541 // be using this CompileTask; we can free it. | |
1542 free_task(task); | |
1543 } | |
1544 | |
1545 // ------------------------------------------------------------------ | |
1546 // CompileBroker::compiler_thread_loop | |
1547 // | |
1548 // The main loop run by a CompilerThread. | |
1549 void CompileBroker::compiler_thread_loop() { | |
1550 CompilerThread* thread = CompilerThread::current(); | |
1551 CompileQueue* queue = thread->queue(); | |
1552 | |
1553 // For the thread that initializes the ciObjectFactory | |
1554 // this resource mark holds all the shared objects | |
1555 ResourceMark rm; | |
1556 | |
1557 // First thread to get here will initialize the compiler interface | |
1558 | |
1559 if (!ciObjectFactory::is_initialized()) { | |
1560 ASSERT_IN_VM; | |
1561 MutexLocker only_one (CompileThread_lock, thread); | |
1562 if (!ciObjectFactory::is_initialized()) { | |
1563 ciObjectFactory::initialize(); | |
1564 } | |
1565 } | |
1566 | |
1567 // Open a log. | |
1568 if (LogCompilation) { | |
1569 init_compiler_thread_log(); | |
1570 } | |
1571 CompileLog* log = thread->log(); | |
1572 if (log != NULL) { | |
6843 | 1573 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", |
1574 thread->name(), | |
0 | 1575 os::current_thread_id(), |
1576 os::current_process_id()); | |
1577 log->stamp(); | |
1578 log->end_elem(); | |
1579 } | |
1580 | |
1581 while (true) { | |
1582 { | |
1583 // We need this HandleMark to avoid leaking VM handles. | |
1584 HandleMark hm(thread); | |
1202 | 1585 |
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1586 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) { |
1202 | 1587 // the code cache is really full |
1588 handle_full_code_cache(); | |
1589 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { | |
1590 // Attempt to start cleaning the code cache while there is still a little headroom | |
1591 NMethodSweeper::handle_full_code_cache(false); | |
0 | 1592 } |
1593 | |
1594 CompileTask* task = queue->get(); | |
1595 | |
1596 // Give compiler threads an extra quanta. They tend to be bursty and | |
1597 // this helps the compiler to finish up the job. | |
1598 if( CompilerThreadHintNoPreempt ) | |
1599 os::hint_no_preempt(); | |
1600 | |
1601 // trace per thread time and compile statistics | |
1602 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); | |
1603 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); | |
1604 | |
1605 // Assign the task to the current thread. Mark this compilation | |
1606 // thread as active for the profiler. | |
1607 CompileTaskWrapper ctw(task); | |
1608 nmethodLocker result_handle; // (handle for the nmethod produced by this task) | |
1609 task->set_code_handle(&result_handle); | |
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1610 methodHandle method(thread, task->method()); |
0 | 1611 |
1612 // Never compile a method if breakpoints are present in it | |
1613 if (method()->number_of_breakpoints() == 0) { | |
1614 // Compile the method. | |
1202 | 1615 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
0 | 1616 #ifdef COMPILER1 |
1617 // Allow repeating compilations for the purpose of benchmarking | |
1618 // compile speed. This is not useful for customers. | |
1619 if (CompilationRepeat != 0) { | |
1620 int compile_count = CompilationRepeat; | |
1621 while (compile_count > 0) { | |
1622 invoke_compiler_on_method(task); | |
1623 nmethod* nm = method->code(); | |
1624 if (nm != NULL) { | |
1625 nm->make_zombie(); | |
1626 method->clear_code(); | |
1627 } | |
1628 compile_count--; | |
1629 } | |
1630 } | |
1631 #endif /* COMPILER1 */ | |
1632 invoke_compiler_on_method(task); | |
1633 } else { | |
1634 // After compilation is disabled, remove remaining methods from queue | |
1635 method->clear_queued_for_compilation(); | |
1636 } | |
1637 } | |
1638 } | |
1639 } | |
1640 } | |
1641 | |
1642 | |
1643 // ------------------------------------------------------------------ | |
1644 // CompileBroker::init_compiler_thread_log | |
1645 // | |
1646 // Set up state required by +LogCompilation. | |
1647 void CompileBroker::init_compiler_thread_log() { | |
1648 CompilerThread* thread = CompilerThread::current(); | |
1649 char fileBuf[4*K]; | |
1650 FILE* fp = NULL; | |
1651 char* file = NULL; | |
1652 intx thread_id = os::current_thread_id(); | |
1653 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { | |
1654 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); | |
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1655 if (dir == NULL) { |
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1656 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", |
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1657 thread_id, os::current_process_id()); |
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1658 } else { |
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1659 jio_snprintf(fileBuf, sizeof(fileBuf), |
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1660 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
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1661 os::file_separator(), thread_id, os::current_process_id()); |
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1662 } |
0 | 1663 fp = fopen(fileBuf, "at"); |
1664 if (fp != NULL) { | |
6197 | 1665 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1, mtCompiler); |
0 | 1666 strcpy(file, fileBuf); |
1667 break; | |
1668 } | |
1669 } | |
1670 if (fp == NULL) { | |
1671 warning("Cannot open log file: %s", fileBuf); | |
1672 } else { | |
1673 if (LogCompilation && Verbose) | |
1674 tty->print_cr("Opening compilation log %s", file); | |
6197 | 1675 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file, fp, thread_id); |
0 | 1676 thread->init_log(log); |
1677 | |
1678 if (xtty != NULL) { | |
1679 ttyLocker ttyl; | |
1680 | |
1681 // Record any per thread log files | |
1682 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); | |
1683 } | |
1684 } | |
1685 } | |
1686 | |
1687 // ------------------------------------------------------------------ | |
1688 // CompileBroker::set_should_block | |
1689 // | |
1690 // Set _should_block. | |
1691 // Call this from the VM, with Threads_lock held and a safepoint requested. | |
1692 void CompileBroker::set_should_block() { | |
1693 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
1694 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); | |
1695 #ifndef PRODUCT | |
1696 if (PrintCompilation && (Verbose || WizardMode)) | |
1697 tty->print_cr("notifying compiler thread pool to block"); | |
1698 #endif | |
1699 _should_block = true; | |
1700 } | |
1701 | |
1702 // ------------------------------------------------------------------ | |
1703 // CompileBroker::maybe_block | |
1704 // | |
1705 // Call this from the compiler at convenient points, to poll for _should_block. | |
1706 void CompileBroker::maybe_block() { | |
1707 if (_should_block) { | |
1708 #ifndef PRODUCT | |
1709 if (PrintCompilation && (Verbose || WizardMode)) | |
1710 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); | |
1711 #endif | |
1712 ThreadInVMfromNative tivfn(JavaThread::current()); | |
1713 } | |
1714 } | |
1715 | |
1716 // ------------------------------------------------------------------ | |
1717 // CompileBroker::invoke_compiler_on_method | |
1718 // | |
1719 // Compile a method. | |
1720 // | |
1721 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { | |
1722 if (PrintCompilation) { | |
1723 ResourceMark rm; | |
1724 task->print_line(); | |
1725 } | |
1726 elapsedTimer time; | |
1727 | |
1728 CompilerThread* thread = CompilerThread::current(); | |
1729 ResourceMark rm(thread); | |
1730 | |
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1731 if (LogEvents) { |
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1732 _compilation_log->log_compile(thread, task); |
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1733 } |
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1734 |
0 | 1735 // Common flags. |
1736 uint compile_id = task->compile_id(); | |
1737 int osr_bci = task->osr_bci(); | |
1738 bool is_osr = (osr_bci != standard_entry_bci); | |
1739 bool should_log = (thread->log() != NULL); | |
1740 bool should_break = false; | |
1741 { | |
1742 // create the handle inside it's own block so it can't | |
1743 // accidentally be referenced once the thread transitions to | |
1744 // native. The NoHandleMark before the transition should catch | |
1745 // any cases where this occurs in the future. | |
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1746 methodHandle method(thread, task->method()); |
0 | 1747 should_break = check_break_at(method, compile_id, is_osr); |
1748 if (should_log && !CompilerOracle::should_log(method)) { | |
1749 should_log = false; | |
1750 } | |
1751 assert(!method->is_native(), "no longer compile natives"); | |
1752 | |
1753 // Save information about this method in case of failure. | |
1754 set_last_compile(thread, method, is_osr, task->comp_level()); | |
1755 | |
1756 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); | |
1757 } | |
1758 | |
1759 // Allocate a new set of JNI handles. | |
1760 push_jni_handle_block(); | |
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1761 Method* target_handle = task->method(); |
0 | 1762 int compilable = ciEnv::MethodCompilable; |
1763 { | |
1764 int system_dictionary_modification_counter; | |
1765 { | |
1766 MutexLocker locker(Compile_lock, thread); | |
1767 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); | |
1768 } | |
1769 | |
1770 NoHandleMark nhm; | |
1771 ThreadToNativeFromVM ttn(thread); | |
1772 | |
1773 ciEnv ci_env(task, system_dictionary_modification_counter); | |
1774 if (should_break) { | |
1775 ci_env.set_break_at_compile(true); | |
1776 } | |
1777 if (should_log) { | |
1778 ci_env.set_log(thread->log()); | |
1779 } | |
1780 assert(thread->env() == &ci_env, "set by ci_env"); | |
1781 // The thread-env() field is cleared in ~CompileTaskWrapper. | |
1782 | |
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1783 // Cache Jvmti state |
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1784 ci_env.cache_jvmti_state(); |
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1785 |
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1786 // Cache DTrace flags |
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1787 ci_env.cache_dtrace_flags(); |
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1788 |
0 | 1789 ciMethod* target = ci_env.get_method_from_handle(target_handle); |
1790 | |
1791 TraceTime t1("compilation", &time); | |
1792 | |
1793 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); | |
1794 | |
1795 if (!ci_env.failing() && task->code() == NULL) { | |
1796 //assert(false, "compiler should always document failure"); | |
1797 // The compiler elected, without comment, not to register a result. | |
1798 // Do not attempt further compilations of this method. | |
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1799 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); |
0 | 1800 } |
1801 | |
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1802 // Copy this bit to the enclosing block: |
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1803 compilable = ci_env.compilable(); |
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1804 |
0 | 1805 if (ci_env.failing()) { |
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1806 const char* retry_message = ci_env.retry_message(); |
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1807 if (_compilation_log != NULL) { |
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1808 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message); |
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1809 } |
0 | 1810 if (PrintCompilation) { |
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1811 FormatBufferResource msg = retry_message != NULL ? |
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1812 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) : |
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1813 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason()); |
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1814 task->print_compilation(tty, msg); |
0 | 1815 } |
1816 } else { | |
1817 task->mark_success(); | |
1818 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); | |
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1819 if (_compilation_log != NULL) { |
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1820 nmethod* code = task->code(); |
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1821 if (code != NULL) { |
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1822 _compilation_log->log_nmethod(thread, code); |
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1823 } |
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1824 } |
0 | 1825 } |
1826 } | |
1827 pop_jni_handle_block(); | |
1828 | |
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1829 methodHandle method(thread, task->method()); |
0 | 1830 |
1831 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); | |
1832 | |
1833 collect_statistics(thread, time, task); | |
1834 | |
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1835 if (PrintCompilation && PrintCompilation2) { |
4047 | 1836 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp |
1837 tty->print("%4d ", compile_id); // print compilation number | |
1838 tty->print("%s ", (is_osr ? "%" : " ")); | |
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1839 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size(); |
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1840 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes()); |
4047 | 1841 } |
1842 | |
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1843 // Disable compilation, if required. |
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1844 switch (compilable) { |
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1845 case ciEnv::MethodCompilable_never: |
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1846 if (is_osr) |
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1847 method->set_not_osr_compilable_quietly(); |
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1848 else |
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1849 method->set_not_compilable_quietly(); |
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1850 break; |
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1851 case ciEnv::MethodCompilable_not_at_tier: |
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1852 if (is_osr) |
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1853 method->set_not_osr_compilable_quietly(task->comp_level()); |
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1854 else |
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1855 method->set_not_compilable_quietly(task->comp_level()); |
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1856 break; |
0 | 1857 } |
1858 | |
1859 // Note that the queued_for_compilation bits are cleared without | |
1860 // protection of a mutex. [They were set by the requester thread, | |
1861 // when adding the task to the complie queue -- at which time the | |
1862 // compile queue lock was held. Subsequently, we acquired the compile | |
1863 // queue lock to get this task off the compile queue; thus (to belabour | |
1864 // the point somewhat) our clearing of the bits must be occurring | |
1865 // only after the setting of the bits. See also 14012000 above. | |
1866 method->clear_queued_for_compilation(); | |
1867 | |
1868 #ifdef ASSERT | |
1869 if (CollectedHeap::fired_fake_oom()) { | |
1870 // The current compile received a fake OOM during compilation so | |
1871 // go ahead and exit the VM since the test apparently succeeded | |
1872 tty->print_cr("*** Shutting down VM after successful fake OOM"); | |
1873 vm_exit(0); | |
1874 } | |
1875 #endif | |
1876 } | |
1877 | |
1878 // ------------------------------------------------------------------ | |
1202 | 1879 // CompileBroker::handle_full_code_cache |
1880 // | |
1881 // The CodeCache is full. Print out warning and disable compilation or | |
1882 // try code cache cleaning so compilation can continue later. | |
1883 void CompileBroker::handle_full_code_cache() { | |
1884 UseInterpreter = true; | |
1885 if (UseCompiler || AlwaysCompileLoopMethods ) { | |
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1886 if (xtty != NULL) { |
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1887 stringStream s; |
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1888 // Dump code cache state into a buffer before locking the tty, |
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1889 // because log_state() will use locks causing lock conflicts. |
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1890 CodeCache::log_state(&s); |
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1891 // Lock to prevent tearing |
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1892 ttyLocker ttyl; |
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1893 xtty->begin_elem("code_cache_full"); |
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1894 xtty->print(s.as_string()); |
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1895 xtty->stamp(); |
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1896 xtty->end_elem(); |
1202 | 1897 } |
1578
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1898 warning("CodeCache is full. Compiler has been disabled."); |
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1899 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); |
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1900 CodeCache::print_bounds(tty); |
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1901 #ifndef PRODUCT |
1202 | 1902 if (CompileTheWorld || ExitOnFullCodeCache) { |
1903 before_exit(JavaThread::current()); | |
1904 exit_globals(); // will delete tty | |
1905 vm_direct_exit(CompileTheWorld ? 0 : 1); | |
1906 } | |
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1907 #endif |
1202 | 1908 if (UseCodeCacheFlushing) { |
1909 NMethodSweeper::handle_full_code_cache(true); | |
1910 } else { | |
1911 UseCompiler = false; | |
1912 AlwaysCompileLoopMethods = false; | |
1913 } | |
1914 } | |
1915 } | |
1916 | |
1917 // ------------------------------------------------------------------ | |
0 | 1918 // CompileBroker::set_last_compile |
1919 // | |
1920 // Record this compilation for debugging purposes. | |
1921 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { | |
1922 ResourceMark rm; | |
1923 char* method_name = method->name()->as_C_string(); | |
1924 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); | |
1925 char current_method[CompilerCounters::cmname_buffer_length]; | |
1926 size_t maxLen = CompilerCounters::cmname_buffer_length; | |
1927 | |
1928 if (UsePerfData) { | |
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1929 const char* class_name = method->method_holder()->name()->as_C_string(); |
0 | 1930 |
1931 size_t s1len = strlen(class_name); | |
1932 size_t s2len = strlen(method_name); | |
1933 | |
1934 // check if we need to truncate the string | |
1935 if (s1len + s2len + 2 > maxLen) { | |
1936 | |
1937 // the strategy is to lop off the leading characters of the | |
1938 // class name and the trailing characters of the method name. | |
1939 | |
1940 if (s2len + 2 > maxLen) { | |
1941 // lop of the entire class name string, let snprintf handle | |
1942 // truncation of the method name. | |
1943 class_name += s1len; // null string | |
1944 } | |
1945 else { | |
1946 // lop off the extra characters from the front of the class name | |
1947 class_name += ((s1len + s2len + 2) - maxLen); | |
1948 } | |
1949 } | |
1950 | |
1951 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); | |
1952 } | |
1953 | |
1954 if (CICountOSR && is_osr) { | |
1955 _last_compile_type = osr_compile; | |
1956 } else { | |
1957 _last_compile_type = normal_compile; | |
1958 } | |
1959 _last_compile_level = comp_level; | |
1960 | |
1961 if (UsePerfData) { | |
1962 CompilerCounters* counters = thread->counters(); | |
1963 counters->set_current_method(current_method); | |
1964 counters->set_compile_type((jlong)_last_compile_type); | |
1965 } | |
1966 } | |
1967 | |
1968 | |
1969 // ------------------------------------------------------------------ | |
1970 // CompileBroker::push_jni_handle_block | |
1971 // | |
1972 // Push on a new block of JNI handles. | |
1973 void CompileBroker::push_jni_handle_block() { | |
1974 JavaThread* thread = JavaThread::current(); | |
1975 | |
1976 // Allocate a new block for JNI handles. | |
1977 // Inlined code from jni_PushLocalFrame() | |
1978 JNIHandleBlock* java_handles = thread->active_handles(); | |
1979 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); | |
1980 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); | |
1981 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. | |
1982 thread->set_active_handles(compile_handles); | |
1983 } | |
1984 | |
1985 | |
1986 // ------------------------------------------------------------------ | |
1987 // CompileBroker::pop_jni_handle_block | |
1988 // | |
1989 // Pop off the current block of JNI handles. | |
1990 void CompileBroker::pop_jni_handle_block() { | |
1991 JavaThread* thread = JavaThread::current(); | |
1992 | |
1993 // Release our JNI handle block | |
1994 JNIHandleBlock* compile_handles = thread->active_handles(); | |
1995 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); | |
1996 thread->set_active_handles(java_handles); | |
1997 compile_handles->set_pop_frame_link(NULL); | |
1998 JNIHandleBlock::release_block(compile_handles, thread); // may block | |
1999 } | |
2000 | |
2001 | |
2002 // ------------------------------------------------------------------ | |
2003 // CompileBroker::check_break_at | |
2004 // | |
2005 // Should the compilation break at the current compilation. | |
2006 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { | |
2007 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { | |
2008 return true; | |
2009 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling | |
2010 return true; | |
2011 } else { | |
2012 return (compile_id == CIBreakAt); | |
2013 } | |
2014 } | |
2015 | |
2016 // ------------------------------------------------------------------ | |
2017 // CompileBroker::collect_statistics | |
2018 // | |
2019 // Collect statistics about the compilation. | |
2020 | |
2021 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { | |
2022 bool success = task->is_success(); | |
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2023 methodHandle method (thread, task->method()); |
0 | 2024 uint compile_id = task->compile_id(); |
2025 bool is_osr = (task->osr_bci() != standard_entry_bci); | |
2026 nmethod* code = task->code(); | |
2027 CompilerCounters* counters = thread->counters(); | |
2028 | |
2029 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); | |
2030 MutexLocker locker(CompileStatistics_lock); | |
2031 | |
2032 // _perf variables are production performance counters which are | |
2033 // updated regardless of the setting of the CITime and CITimeEach flags | |
2034 // | |
2035 if (!success) { | |
2036 _total_bailout_count++; | |
2037 if (UsePerfData) { | |
2038 _perf_last_failed_method->set_value(counters->current_method()); | |
2039 _perf_last_failed_type->set_value(counters->compile_type()); | |
2040 _perf_total_bailout_count->inc(); | |
2041 } | |
2042 } else if (code == NULL) { | |
2043 if (UsePerfData) { | |
2044 _perf_last_invalidated_method->set_value(counters->current_method()); | |
2045 _perf_last_invalidated_type->set_value(counters->compile_type()); | |
2046 _perf_total_invalidated_count->inc(); | |
2047 } | |
2048 _total_invalidated_count++; | |
2049 } else { | |
2050 // Compilation succeeded | |
2051 | |
2052 // update compilation ticks - used by the implementation of | |
2053 // java.lang.management.CompilationMBean | |
2054 _perf_total_compilation->inc(time.ticks()); | |
2055 | |
2056 if (CITime) { | |
2057 _t_total_compilation.add(time); | |
2058 if (is_osr) { | |
2059 _t_osr_compilation.add(time); | |
2060 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
2061 } else { | |
2062 _t_standard_compilation.add(time); | |
2063 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
2064 } | |
2065 } | |
2066 | |
2067 if (UsePerfData) { | |
2068 // save the name of the last method compiled | |
2069 _perf_last_method->set_value(counters->current_method()); | |
2070 _perf_last_compile_type->set_value(counters->compile_type()); | |
2071 _perf_last_compile_size->set_value(method->code_size() + | |
2072 task->num_inlined_bytecodes()); | |
2073 if (is_osr) { | |
2074 _perf_osr_compilation->inc(time.ticks()); | |
2075 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
2076 } else { | |
2077 _perf_standard_compilation->inc(time.ticks()); | |
2078 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
2079 } | |
2080 } | |
2081 | |
2082 if (CITimeEach) { | |
2083 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); | |
2084 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", | |
2085 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); | |
2086 } | |
2087 | |
2088 // Collect counts of successful compilations | |
1748 | 2089 _sum_nmethod_size += code->total_size(); |
2090 _sum_nmethod_code_size += code->insts_size(); | |
0 | 2091 _total_compile_count++; |
2092 | |
2093 if (UsePerfData) { | |
1748 | 2094 _perf_sum_nmethod_size->inc( code->total_size()); |
2095 _perf_sum_nmethod_code_size->inc(code->insts_size()); | |
0 | 2096 _perf_total_compile_count->inc(); |
2097 } | |
2098 | |
2099 if (is_osr) { | |
2100 if (UsePerfData) _perf_total_osr_compile_count->inc(); | |
2101 _total_osr_compile_count++; | |
2102 } else { | |
2103 if (UsePerfData) _perf_total_standard_compile_count->inc(); | |
2104 _total_standard_compile_count++; | |
2105 } | |
2106 } | |
2107 // set the current method for the thread to null | |
2108 if (UsePerfData) counters->set_current_method(""); | |
2109 } | |
2110 | |
2111 | |
2112 | |
2113 void CompileBroker::print_times() { | |
2114 tty->cr(); | |
2115 tty->print_cr("Accumulated compiler times (for compiled methods only)"); | |
2116 tty->print_cr("------------------------------------------------"); | |
2117 //0000000000111111111122222222223333333333444444444455555555556666666666 | |
2118 //0123456789012345678901234567890123456789012345678901234567890123456789 | |
2119 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); | |
2120 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", | |
2121 CompileBroker::_t_standard_compilation.seconds(), | |
2122 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); | |
2123 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 | 2124 |
1783 | 2125 if (compiler(CompLevel_simple) != NULL) { |
2126 compiler(CompLevel_simple)->print_timers(); | |
0 | 2127 } |
1783 | 2128 if (compiler(CompLevel_full_optimization) != NULL) { |
2129 compiler(CompLevel_full_optimization)->print_timers(); | |
2130 } | |
0 | 2131 tty->cr(); |
2132 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; | |
2133 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); | |
2134 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); | |
2135 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); | |
2136 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); | |
2137 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); | |
2138 tty->cr(); | |
2139 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); | |
2140 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); | |
2141 } | |
2142 | |
2143 | |
2144 // Debugging output for failure | |
2145 void CompileBroker::print_last_compile() { | |
2146 if ( _last_compile_level != CompLevel_none && | |
2147 compiler(_last_compile_level) != NULL && | |
2148 _last_method_compiled != NULL && | |
2149 _last_compile_type != no_compile) { | |
2150 if (_last_compile_type == osr_compile) { | |
2151 tty->print_cr("Last parse: [osr]%d+++(%d) %s", | |
2152 _osr_compilation_id, _last_compile_level, _last_method_compiled); | |
2153 } else { | |
2154 tty->print_cr("Last parse: %d+++(%d) %s", | |
2155 _compilation_id, _last_compile_level, _last_method_compiled); | |
2156 } | |
2157 } | |
2158 } | |
2159 | |
2160 | |
2161 void CompileBroker::print_compiler_threads_on(outputStream* st) { | |
2162 #ifndef PRODUCT | |
2163 st->print_cr("Compiler thread printing unimplemented."); | |
2164 st->cr(); | |
2165 #endif | |
2166 } |