1 /*
2 * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "compiler/compileTask.hpp"
27 #include "compiler/compileLog.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/compilerDirectives.hpp"
30
31 CompileTask* CompileTask::_task_free_list = NULL;
32 #ifdef ASSERT
33 int CompileTask::_num_allocated_tasks = 0;
34 #endif
35
36 /**
37 * Allocate a CompileTask, from the free list if possible.
38 */
39 CompileTask* CompileTask::allocate() {
40 MutexLocker locker(CompileTaskAlloc_lock);
41 CompileTask* task = NULL;
42
43 if (_task_free_list != NULL) {
44 task = _task_free_list;
45 _task_free_list = task->next();
46 task->set_next(NULL);
47 } else {
48 task = new CompileTask();
49 DEBUG_ONLY(_num_allocated_tasks++;)
50 assert (WhiteBoxAPI || _num_allocated_tasks < 10000, "Leaking compilation tasks?");
51 task->set_next(NULL);
52 task->set_is_free(true);
53 }
54 assert(task->is_free(), "Task must be free.");
55 task->set_is_free(false);
56 return task;
57 }
58
59 /**
60 * Add a task to the free list.
61 */
62
63 void CompileTask::free(CompileTask* task) {
64 MutexLocker locker(CompileTaskAlloc_lock);
65 if (!task->is_free()) {
66 task->set_code(NULL);
67 assert(!task->lock()->is_locked(), "Should not be locked when freed");
68 JNIHandles::destroy_global(task->_method_holder);
69 JNIHandles::destroy_global(task->_hot_method_holder);
70
71 task->set_is_free(true);
72 task->set_next(_task_free_list);
73 _task_free_list = task;
74 }
75 }
76
77
78 void CompileTask::initialize(int compile_id,
79 methodHandle method,
80 int osr_bci,
81 int comp_level,
82 methodHandle hot_method,
83 int hot_count,
84 const char* comment,
85 bool is_blocking) {
86 assert(!_lock->is_locked(), "bad locking");
87
88 _compile_id = compile_id;
89 _method = method();
90 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
91 _osr_bci = osr_bci;
92 _is_blocking = is_blocking;
93 _comp_level = comp_level;
94 _num_inlined_bytecodes = 0;
95
96 _is_complete = false;
97 _is_success = false;
98 _code_handle = NULL;
99
100 _hot_method = NULL;
101 _hot_method_holder = NULL;
102 _hot_count = hot_count;
103 _time_queued = 0; // tidy
104 _comment = comment;
105 _failure_reason = NULL;
106
107 if (LogCompilation) {
108 _time_queued = os::elapsed_counter();
109 if (hot_method.not_null()) {
110 if (hot_method == method) {
111 _hot_method = _method;
112 } else {
113 _hot_method = hot_method();
114 // only add loader or mirror if different from _method_holder
115 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
116 }
117 }
118 }
119
120 _next = NULL;
121 }
122
123 // ------------------------------------------------------------------
124 // CompileTask::code/set_code
125 //
126 nmethod* CompileTask::code() const {
127 if (_code_handle == NULL) return NULL;
128 return _code_handle->code();
129 }
130
131 void CompileTask::set_code(nmethod* nm) {
132 if (_code_handle == NULL && nm == NULL) return;
133 guarantee(_code_handle != NULL, "");
134 _code_handle->set_code(nm);
135 if (nm == NULL) _code_handle = NULL; // drop the handle also
136 }
137
138 void CompileTask::mark_on_stack() {
139 // Mark these methods as something redefine classes cannot remove.
140 _method->set_on_stack(true);
141 if (_hot_method != NULL) {
142 _hot_method->set_on_stack(true);
143 }
144 }
145
146 // RedefineClasses support
147 void CompileTask::metadata_do(void f(Metadata*)) {
148 f(method());
149 if (hot_method() != NULL && hot_method() != method()) {
150 f(hot_method());
151 }
152 }
153
154 // ------------------------------------------------------------------
155 // CompileTask::print_line_on_error
156 //
157 // This function is called by fatal error handler when the thread
158 // causing troubles is a compiler thread.
159 //
160 // Do not grab any lock, do not allocate memory.
161 //
162 // Otherwise it's the same as CompileTask::print_line()
163 //
164 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
165 // print compiler name
166 st->print("%s:", CompileBroker::compiler_name(comp_level()));
167 print(st);
168 }
169
170 // ------------------------------------------------------------------
171 // CompileTask::print_tty
172 void CompileTask::print_tty() {
173 ttyLocker ttyl; // keep the following output all in one block
174 // print compiler name if requested
175 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
176 print(tty);
177 }
178
179 // ------------------------------------------------------------------
180 // CompileTask::print_impl
181 void CompileTask::print_impl(outputStream* st, Method* method, int compile_id, int comp_level,
182 bool is_osr_method, int osr_bci, bool is_blocking,
183 const char* msg, bool short_form, bool cr) {
184 if (!short_form) {
185 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
186 }
187 st->print("%4d ", compile_id); // print compilation number
188
189 // For unloaded methods the transition to zombie occurs after the
190 // method is cleared so it's impossible to report accurate
191 // information for that case.
192 bool is_synchronized = false;
193 bool has_exception_handler = false;
194 bool is_native = false;
195 if (method != NULL) {
196 is_synchronized = method->is_synchronized();
197 has_exception_handler = method->has_exception_handler();
198 is_native = method->is_native();
199 }
200 // method attributes
201 const char compile_type = is_osr_method ? '%' : ' ';
202 const char sync_char = is_synchronized ? 's' : ' ';
203 const char exception_char = has_exception_handler ? '!' : ' ';
204 const char blocking_char = is_blocking ? 'b' : ' ';
205 const char native_char = is_native ? 'n' : ' ';
206
207 // print method attributes
208 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
209
210 if (TieredCompilation) {
211 if (comp_level != -1) st->print("%d ", comp_level);
212 else st->print("- ");
213 }
214 st->print(" "); // more indent
215
216 if (method == NULL) {
217 st->print("(method)");
218 } else {
219 method->print_short_name(st);
220 if (is_osr_method) {
221 st->print(" @ %d", osr_bci);
222 }
223 if (method->is_native())
224 st->print(" (native)");
225 else
226 st->print(" (%d bytes)", method->code_size());
227 }
228
229 if (msg != NULL) {
230 st->print(" %s", msg);
231 }
232 if (cr) {
233 st->cr();
234 }
235 }
236
237 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
238 // 1234567
239 st->print(" "); // print timestamp
240 // 1234
241 st->print(" "); // print compilation number
242 // %s!bn
243 st->print(" "); // print method attributes
244 if (TieredCompilation) {
245 st->print(" ");
246 }
247 st->print(" "); // more indent
248 st->print(" "); // initial inlining indent
249 for (int i = 0; i < inline_level; i++) st->print(" ");
250 }
251
252 // ------------------------------------------------------------------
253 // CompileTask::print_compilation
254 void CompileTask::print(outputStream* st, const char* msg, bool short_form, bool cr) {
255 bool is_osr_method = osr_bci() != InvocationEntryBci;
256 print_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form, cr);
257 }
258
259 // ------------------------------------------------------------------
260 // CompileTask::log_task
261 void CompileTask::log_task(xmlStream* log) {
262 Thread* thread = Thread::current();
263 methodHandle method(thread, this->method());
264 ResourceMark rm(thread);
265
266 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
267 log->print(" compile_id='%d'", _compile_id);
268 if (_osr_bci != CompileBroker::standard_entry_bci) {
269 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
270 } // else compile_kind='c2c'
271 if (!method.is_null()) log->method(method);
272 if (_osr_bci != CompileBroker::standard_entry_bci) {
273 log->print(" osr_bci='%d'", _osr_bci);
274 }
275 if (_comp_level != CompLevel_highest_tier) {
276 log->print(" level='%d'", _comp_level);
277 }
278 if (_is_blocking) {
279 log->print(" blocking='1'");
280 }
281 log->stamp();
282 }
283
284 // ------------------------------------------------------------------
285 // CompileTask::log_task_queued
286 void CompileTask::log_task_queued() {
287 Thread* thread = Thread::current();
288 ttyLocker ttyl;
289 ResourceMark rm(thread);
290
291 xtty->begin_elem("task_queued");
292 log_task(xtty);
293 if (_comment != NULL) {
294 xtty->print(" comment='%s'", _comment);
295 }
296 if (_hot_method != NULL) {
297 methodHandle hot(thread, _hot_method);
298 methodHandle method(thread, _method);
299 if (hot() != method()) {
300 xtty->method(hot);
301 }
302 }
303 if (_hot_count != 0) {
304 xtty->print(" hot_count='%d'", _hot_count);
305 }
306 xtty->end_elem();
307 }
308
309
310 // ------------------------------------------------------------------
311 // CompileTask::log_task_start
312 void CompileTask::log_task_start(CompileLog* log) {
313 log->begin_head("task");
314 log_task(log);
315 log->end_head();
316 }
317
318
319 // ------------------------------------------------------------------
320 // CompileTask::log_task_done
321 void CompileTask::log_task_done(CompileLog* log) {
322 Thread* thread = Thread::current();
323 methodHandle method(thread, this->method());
324 ResourceMark rm(thread);
325
326 if (!_is_success) {
327 const char* reason = _failure_reason != NULL ? _failure_reason : "unknown";
328 log->elem("failure reason='%s'", reason);
329 }
330
331 // <task_done ... stamp='1.234'> </task>
332 nmethod* nm = code();
333 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
334 _is_success, nm == NULL ? 0 : nm->content_size(),
335 method->invocation_count());
336 int bec = method->backedge_count();
337 if (bec != 0) log->print(" backedge_count='%d'", bec);
338 // Note: "_is_complete" is about to be set, but is not.
339 if (_num_inlined_bytecodes != 0) {
340 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
341 }
342 log->stamp();
343 log->end_elem();
344 log->clear_identities(); // next task will have different CI
345 log->tail("task");
346 if (log->unflushed_count() > 2000) {
347 log->flush();
348 }
349 log->mark_file_end();
350 }
351
352 // ------------------------------------------------------------------
353 // CompileTask::check_break_at_flags
354 bool CompileTask::check_break_at_flags() {
355 int compile_id = this->_compile_id;
356 bool is_osr = (_osr_bci != CompileBroker::standard_entry_bci);
357
358 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
359 return true;
360 } else {
361 return (compile_id == CIBreakAt);
362 }
363 }
364
365 // ------------------------------------------------------------------
366 // CompileTask::print_inlining
367 void CompileTask::print_inlining_inner(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
368 // 1234567
369 st->print(" "); // print timestamp
370 // 1234
371 st->print(" "); // print compilation number
372
373 // method attributes
374 if (method->is_loaded()) {
375 const char sync_char = method->is_synchronized() ? 's' : ' ';
376 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
377 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
378
379 // print method attributes
380 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
381 } else {
382 // %s!bn
383 st->print(" "); // print method attributes
384 }
385
386 if (TieredCompilation) {
387 st->print(" ");
388 }
389 st->print(" "); // more indent
390 st->print(" "); // initial inlining indent
391
392 for (int i = 0; i < inline_level; i++) st->print(" ");
393
394 st->print("@ %d ", bci); // print bci
395 method->print_short_name(st);
396 if (method->is_loaded())
397 st->print(" (%d bytes)", method->code_size());
398 else
399 st->print(" (not loaded)");
400
401 if (msg != NULL) {
402 st->print(" %s", msg);
403 }
404 st->cr();
405 }