1 /*
2 * Copyright (c) 1999, 2013, 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 #ifndef SHARE_VM_COMPILER_COMPILEBROKER_HPP
26 #define SHARE_VM_COMPILER_COMPILEBROKER_HPP
27
28 #include "ci/compilerInterface.hpp"
29 #include "compiler/abstractCompiler.hpp"
30 #include "runtime/perfData.hpp"
31
32 class nmethod;
33 class nmethodLocker;
34
35 // CompileTask
36 //
37 // An entry in the compile queue. It represents a pending or current
38 // compilation.
39 class CompileTask : public CHeapObj<mtCompiler> {
40 friend class VMStructs;
41
42 private:
43 static CompileTask* _task_free_list;
44 #ifdef ASSERT
45 static int _num_allocated_tasks;
46 #endif
47
48 Monitor* _lock;
49 uint _compile_id;
50 Method* _method;
51 jobject _method_holder;
52 int _osr_bci;
53 bool _is_complete;
54 bool _is_success;
55 bool _is_blocking;
56 int _comp_level;
57 int _num_inlined_bytecodes;
58 nmethodLocker* _code_handle; // holder of eventual result
59 CompileTask* _next, *_prev;
60 bool _is_free;
61 // Fields used for logging why the compilation was initiated:
62 jlong _time_queued; // in units of os::elapsed_counter()
63 Method* _hot_method; // which method actually triggered this task
64 jobject _hot_method_holder;
65 int _hot_count; // information about its invocation counter
66 const char* _comment; // more info about the task
67 const char* _failure_reason;
68
69 public:
70 CompileTask() {
71 _lock = new Monitor(Mutex::nonleaf+2, "CompileTaskLock");
72 }
73
74 void initialize(int compile_id, methodHandle method, int osr_bci, int comp_level,
75 methodHandle hot_method, int hot_count, const char* comment,
76 bool is_blocking);
77
78 static CompileTask* allocate();
79 static void free(CompileTask* task);
80
81 int compile_id() const { return _compile_id; }
82 Method* method() const { return _method; }
83 int osr_bci() const { return _osr_bci; }
84 bool is_complete() const { return _is_complete; }
85 bool is_blocking() const { return _is_blocking; }
86 bool is_success() const { return _is_success; }
87
88 nmethodLocker* code_handle() const { return _code_handle; }
89 void set_code_handle(nmethodLocker* l) { _code_handle = l; }
90 nmethod* code() const; // _code_handle->code()
91 void set_code(nmethod* nm); // _code_handle->set_code(nm)
92
93 Monitor* lock() const { return _lock; }
94
95 void mark_complete() { _is_complete = true; }
96 void mark_success() { _is_success = true; }
97
98 int comp_level() { return _comp_level;}
99 void set_comp_level(int comp_level) { _comp_level = comp_level;}
100
101 int num_inlined_bytecodes() const { return _num_inlined_bytecodes; }
102 void set_num_inlined_bytecodes(int n) { _num_inlined_bytecodes = n; }
103
104 CompileTask* next() const { return _next; }
105 void set_next(CompileTask* next) { _next = next; }
106 CompileTask* prev() const { return _prev; }
107 void set_prev(CompileTask* prev) { _prev = prev; }
108 bool is_free() const { return _is_free; }
109 void set_is_free(bool val) { _is_free = val; }
110
111 private:
112 static void print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
113 bool is_osr_method = false, int osr_bci = -1, bool is_blocking = false,
114 const char* msg = NULL, bool short_form = false);
115
116 public:
117 void print_compilation(outputStream* st = tty, const char* msg = NULL, bool short_form = false);
118 static void print_compilation(outputStream* st, const nmethod* nm, const char* msg = NULL, bool short_form = false) {
119 print_compilation_impl(st, nm->method(), nm->compile_id(), nm->comp_level(),
120 nm->is_osr_method(), nm->is_osr_method() ? nm->osr_entry_bci() : -1, /*is_blocking*/ false,
121 msg, short_form);
122 }
123
124 static void print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg = NULL);
125 static void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
126 print_inlining(tty, method, inline_level, bci, msg);
127 }
128
129 // Redefine Classes support
130 void mark_on_stack();
131
132 static void print_inline_indent(int inline_level, outputStream* st = tty);
133
134 void print();
135 void print_line();
136 void print_line_on_error(outputStream* st, char* buf, int buflen);
137
138 void log_task(xmlStream* log);
139 void log_task_queued();
140 void log_task_start(CompileLog* log);
141 void log_task_done(CompileLog* log);
142
143 void set_failure_reason(const char* reason) {
144 _failure_reason = reason;
145 }
146 };
147
148 // CompilerCounters
149 //
150 // Per Compiler Performance Counters.
151 //
152 class CompilerCounters : public CHeapObj<mtCompiler> {
153
154 public:
155 enum {
156 cmname_buffer_length = 160
157 };
158
159 private:
160
161 char _current_method[cmname_buffer_length];
162 PerfStringVariable* _perf_current_method;
163
164 int _compile_type;
165 PerfVariable* _perf_compile_type;
166
167 PerfCounter* _perf_time;
168 PerfCounter* _perf_compiles;
169
170 public:
171 CompilerCounters(const char* name, int instance, TRAPS);
172
173 // these methods should be called in a thread safe context
174
175 void set_current_method(const char* method) {
176 strncpy(_current_method, method, (size_t)cmname_buffer_length);
177 if (UsePerfData) _perf_current_method->set_value(method);
178 }
179
180 char* current_method() { return _current_method; }
181
182 void set_compile_type(int compile_type) {
183 _compile_type = compile_type;
184 if (UsePerfData) _perf_compile_type->set_value((jlong)compile_type);
185 }
186
187 int compile_type() { return _compile_type; }
188
189 PerfCounter* time_counter() { return _perf_time; }
190 PerfCounter* compile_counter() { return _perf_compiles; }
191 };
192
193 // CompileQueue
194 //
195 // A list of CompileTasks.
196 class CompileQueue : public CHeapObj<mtCompiler> {
197 private:
198 const char* _name;
199 Monitor* _lock;
200
201 CompileTask* _first;
202 CompileTask* _last;
203
204 CompileTask* _first_stale;
205
206 int _size;
207
208 void purge_stale_tasks();
209 public:
210 CompileQueue(const char* name, Monitor* lock) {
211 _name = name;
212 _lock = lock;
213 _first = NULL;
214 _last = NULL;
215 _size = 0;
216 _first_stale = NULL;
217 }
218
219 const char* name() const { return _name; }
220 Monitor* lock() const { return _lock; }
221
222 void add(CompileTask* task);
223 void remove(CompileTask* task);
224 void remove_and_mark_stale(CompileTask* task);
225 CompileTask* first() { return _first; }
226 CompileTask* last() { return _last; }
227
228 CompileTask* get();
229
230 bool is_empty() const { return _first == NULL; }
231 int size() const { return _size; }
232
233
234 // Redefine Classes support
235 void mark_on_stack();
236 void free_all();
237 NOT_PRODUCT (void print();)
238
239 ~CompileQueue() {
240 assert (is_empty(), " Compile Queue must be empty");
241 }
242 };
243
244 // CompileTaskWrapper
245 //
246 // Assign this task to the current thread. Deallocate the task
247 // when the compilation is complete.
248 class CompileTaskWrapper : StackObj {
249 public:
250 CompileTaskWrapper(CompileTask* task);
251 ~CompileTaskWrapper();
252 };
253
254
255 // Compilation
256 //
257 // The broker for all compilation requests.
258 class CompileBroker: AllStatic {
259 friend class Threads;
260 friend class CompileTaskWrapper;
261
262 public:
263 enum {
264 name_buffer_length = 100
265 };
266
267 // Compile type Information for print_last_compile() and CompilerCounters
268 enum { no_compile, normal_compile, osr_compile, native_compile };
269 static int assign_compile_id (methodHandle method, int osr_bci);
270
271
272 private:
273 static bool _initialized;
274 static volatile bool _should_block;
275
276 // This flag can be used to stop compilation or turn it back on
277 static volatile jint _should_compile_new_jobs;
278
279 // The installed compiler(s)
280 static AbstractCompiler* _compilers[2];
281
282 // These counters are used for assigning id's to each compilation
283 static volatile jint _compilation_id;
284 static volatile jint _osr_compilation_id;
285
286 static int _last_compile_type;
287 static int _last_compile_level;
288 static char _last_method_compiled[name_buffer_length];
289
290 static CompileQueue* _c2_compile_queue;
291 static CompileQueue* _c1_compile_queue;
292
293 static GrowableArray<CompilerThread*>* _compiler_threads;
294
295 // performance counters
296 static PerfCounter* _perf_total_compilation;
297 static PerfCounter* _perf_native_compilation;
298 static PerfCounter* _perf_osr_compilation;
299 static PerfCounter* _perf_standard_compilation;
300
301 static PerfCounter* _perf_total_bailout_count;
302 static PerfCounter* _perf_total_invalidated_count;
303 static PerfCounter* _perf_total_compile_count;
304 static PerfCounter* _perf_total_native_compile_count;
305 static PerfCounter* _perf_total_osr_compile_count;
306 static PerfCounter* _perf_total_standard_compile_count;
307
308 static PerfCounter* _perf_sum_osr_bytes_compiled;
309 static PerfCounter* _perf_sum_standard_bytes_compiled;
310 static PerfCounter* _perf_sum_nmethod_size;
311 static PerfCounter* _perf_sum_nmethod_code_size;
312
313 static PerfStringVariable* _perf_last_method;
314 static PerfStringVariable* _perf_last_failed_method;
315 static PerfStringVariable* _perf_last_invalidated_method;
316 static PerfVariable* _perf_last_compile_type;
317 static PerfVariable* _perf_last_compile_size;
318 static PerfVariable* _perf_last_failed_type;
319 static PerfVariable* _perf_last_invalidated_type;
320
321 // Timers and counters for generating statistics
322 static elapsedTimer _t_total_compilation;
323 static elapsedTimer _t_osr_compilation;
324 static elapsedTimer _t_standard_compilation;
325
326 static int _total_compile_count;
327 static int _total_bailout_count;
328 static int _total_invalidated_count;
329 static int _total_native_compile_count;
330 static int _total_osr_compile_count;
331 static int _total_standard_compile_count;
332 static int _sum_osr_bytes_compiled;
333 static int _sum_standard_bytes_compiled;
334 static int _sum_nmethod_size;
335 static int _sum_nmethod_code_size;
336 static long _peak_compilation_time;
337
338 static volatile jint _print_compilation_warning;
339
340 static CompilerThread* make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, AbstractCompiler* comp, TRAPS);
341 static void init_compiler_threads(int c1_compiler_count, int c2_compiler_count);
342 static bool compilation_is_complete (methodHandle method, int osr_bci, int comp_level);
343 static bool compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level);
344 static bool is_compile_blocking ();
345 static void preload_classes (methodHandle method, TRAPS);
346
347 static CompileTask* create_compile_task(CompileQueue* queue,
348 int compile_id,
349 methodHandle method,
350 int osr_bci,
351 int comp_level,
352 methodHandle hot_method,
353 int hot_count,
354 const char* comment,
355 bool blocking);
356 static void wait_for_completion(CompileTask* task);
357
358 static void invoke_compiler_on_method(CompileTask* task);
359 static void set_last_compile(CompilerThread *thread, methodHandle method, bool is_osr, int comp_level);
360 static void push_jni_handle_block();
361 static void pop_jni_handle_block();
362 static bool check_break_at(methodHandle method, int compile_id, bool is_osr);
363 static void collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task);
364
365 static void compile_method_base(methodHandle method,
366 int osr_bci,
367 int comp_level,
368 methodHandle hot_method,
369 int hot_count,
370 const char* comment,
371 Thread* thread);
372 static CompileQueue* compile_queue(int comp_level) {
373 if (is_c2_compile(comp_level)) return _c2_compile_queue;
374 if (is_c1_compile(comp_level)) return _c1_compile_queue;
375 return NULL;
376 }
377 static bool init_compiler_runtime();
378 static void shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread);
379
380 public:
381 enum {
382 // The entry bci used for non-OSR compilations.
383 standard_entry_bci = InvocationEntryBci
384 };
385
386 static AbstractCompiler* compiler(int comp_level) {
387 if (is_c2_compile(comp_level)) return _compilers[1]; // C2
388 if (is_c1_compile(comp_level)) return _compilers[0]; // C1
389 return NULL;
390 }
391
392 static bool compilation_is_in_queue(methodHandle method);
393 static int queue_size(int comp_level) {
394 CompileQueue *q = compile_queue(comp_level);
395 return q != NULL ? q->size() : 0;
396 }
397 static void compilation_init();
398 static void init_compiler_thread_log();
399 static nmethod* compile_method(methodHandle method,
400 int osr_bci,
401 int comp_level,
402 methodHandle hot_method,
403 int hot_count,
404 const char* comment, Thread* thread);
405
406 static void compiler_thread_loop();
407 static uint get_compilation_id() { return _compilation_id; }
408
409 // Set _should_block.
410 // Call this from the VM, with Threads_lock held and a safepoint requested.
411 static void set_should_block();
412
413 // Call this from the compiler at convenient points, to poll for _should_block.
414 static void maybe_block();
415
416 enum {
417 // Flags for toggling compiler activity
418 stop_compilation = 0,
419 run_compilation = 1,
420 shutdown_compilaton = 2
421 };
422
423 static bool should_compile_new_jobs() { return UseCompiler && (_should_compile_new_jobs == run_compilation); }
424 static bool set_should_compile_new_jobs(jint new_state) {
425 // Return success if the current caller set it
426 jint old = Atomic::cmpxchg(new_state, &_should_compile_new_jobs, 1-new_state);
427 return (old == (1-new_state));
428 }
429
430 static void disable_compilation_forever() {
431 UseCompiler = false;
432 AlwaysCompileLoopMethods = false;
433 Atomic::xchg(shutdown_compilaton, &_should_compile_new_jobs);
434 }
435
436 static bool is_compilation_disabled_forever() {
437 return _should_compile_new_jobs == shutdown_compilaton;
438 }
439 static void handle_full_code_cache(int code_blob_type);
440 // Ensures that warning is only printed once.
441 static bool should_print_compiler_warning() {
442 jint old = Atomic::cmpxchg(1, &_print_compilation_warning, 0);
443 return old == 0;
444 }
445 // Return total compilation ticks
446 static jlong total_compilation_ticks() {
447 return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;
448 }
449
450 // Redefine Classes support
451 static void mark_on_stack();
452
453 // Print a detailed accounting of compilation time
454 static void print_times();
455
456 // Debugging output for failure
457 static void print_last_compile();
458
459 static void print_compiler_threads_on(outputStream* st);
460
461 // compiler name for debugging
462 static const char* compiler_name(int comp_level);
463
464 static int get_total_compile_count() { return _total_compile_count; }
465 static int get_total_bailout_count() { return _total_bailout_count; }
466 static int get_total_invalidated_count() { return _total_invalidated_count; }
467 static int get_total_native_compile_count() { return _total_native_compile_count; }
468 static int get_total_osr_compile_count() { return _total_osr_compile_count; }
469 static int get_total_standard_compile_count() { return _total_standard_compile_count; }
470 static int get_sum_osr_bytes_compiled() { return _sum_osr_bytes_compiled; }
471 static int get_sum_standard_bytes_compiled() { return _sum_standard_bytes_compiled; }
472 static int get_sum_nmethod_size() { return _sum_nmethod_size;}
473 static int get_sum_nmethod_code_size() { return _sum_nmethod_code_size; }
474 static long get_peak_compilation_time() { return _peak_compilation_time; }
475 static long get_total_compilation_time() { return _t_total_compilation.milliseconds(); }
476 };
477
478 #endif // SHARE_VM_COMPILER_COMPILEBROKER_HPP