1 /*
2 * Copyright (c) 1999, 2010, 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 class nmethod;
26 class nmethodLocker;
27
28 // CompileTask
29 //
30 // An entry in the compile queue. It represents a pending or current
31 // compilation.
32 class CompileTask : public CHeapObj {
33 private:
34 Monitor* _lock;
35 uint _compile_id;
36 jobject _method;
37 int _osr_bci;
38 bool _is_complete;
39 bool _is_success;
40 bool _is_blocking;
41 int _comp_level;
42 int _num_inlined_bytecodes;
43 nmethodLocker* _code_handle; // holder of eventual result
44 CompileTask* _next, *_prev;
45
46 // Fields used for logging why the compilation was initiated:
47 jlong _time_queued; // in units of os::elapsed_counter()
48 jobject _hot_method; // which method actually triggered this task
49 int _hot_count; // information about its invocation counter
50 const char* _comment; // more info about the task
51
52 void print_compilation(outputStream *st, methodOop method, char* method_name);
53 public:
54 CompileTask() {
55 _lock = new Monitor(Mutex::nonleaf+2, "CompileTaskLock");
56 }
57
58 void initialize(int compile_id, methodHandle method, int osr_bci, int comp_level,
59 methodHandle hot_method, int hot_count, const char* comment,
60 bool is_blocking);
61
62 void free();
63
64 int compile_id() const { return _compile_id; }
65 jobject method_handle() const { return _method; }
66 int osr_bci() const { return _osr_bci; }
67 bool is_complete() const { return _is_complete; }
68 bool is_blocking() const { return _is_blocking; }
69 bool is_success() const { return _is_success; }
70
71 nmethodLocker* code_handle() const { return _code_handle; }
72 void set_code_handle(nmethodLocker* l) { _code_handle = l; }
73 nmethod* code() const; // _code_handle->code()
74 void set_code(nmethod* nm); // _code_handle->set_code(nm)
75
76 Monitor* lock() const { return _lock; }
77
78 void mark_complete() { _is_complete = true; }
79 void mark_success() { _is_success = true; }
80
81 int comp_level() { return _comp_level;}
82 void set_comp_level(int comp_level) { _comp_level = comp_level;}
83
84 int num_inlined_bytecodes() const { return _num_inlined_bytecodes; }
85 void set_num_inlined_bytecodes(int n) { _num_inlined_bytecodes = n; }
86
87 CompileTask* next() const { return _next; }
88 void set_next(CompileTask* next) { _next = next; }
89 CompileTask* prev() const { return _prev; }
90 void set_prev(CompileTask* prev) { _prev = prev; }
91
92 void print();
93 void print_line();
94
95 void print_line_on_error(outputStream* st, char* buf, int buflen);
96 void log_task(xmlStream* log);
97 void log_task_queued();
98 void log_task_start(CompileLog* log);
99 void log_task_done(CompileLog* log);
100 };
101
102 // CompilerCounters
103 //
104 // Per Compiler Performance Counters.
105 //
106 class CompilerCounters : public CHeapObj {
107
108 public:
109 enum {
110 cmname_buffer_length = 160
111 };
112
113 private:
114
115 char _current_method[cmname_buffer_length];
116 PerfStringVariable* _perf_current_method;
117
118 int _compile_type;
119 PerfVariable* _perf_compile_type;
120
121 PerfCounter* _perf_time;
122 PerfCounter* _perf_compiles;
123
124 public:
125 CompilerCounters(const char* name, int instance, TRAPS);
126
127 // these methods should be called in a thread safe context
128
129 void set_current_method(const char* method) {
130 strncpy(_current_method, method, (size_t)cmname_buffer_length);
131 if (UsePerfData) _perf_current_method->set_value(method);
132 }
133
134 char* current_method() { return _current_method; }
135
136 void set_compile_type(int compile_type) {
137 _compile_type = compile_type;
138 if (UsePerfData) _perf_compile_type->set_value((jlong)compile_type);
139 }
140
141 int compile_type() { return _compile_type; }
142
143 PerfCounter* time_counter() { return _perf_time; }
144 PerfCounter* compile_counter() { return _perf_compiles; }
145 };
146
147 // CompileQueue
148 //
149 // A list of CompileTasks.
150 class CompileQueue : public CHeapObj {
151 private:
152 const char* _name;
153 Monitor* _lock;
154
155 CompileTask* _first;
156 CompileTask* _last;
157
158 int _size;
159 public:
160 CompileQueue(const char* name, Monitor* lock) {
161 _name = name;
162 _lock = lock;
163 _first = NULL;
164 _last = NULL;
165 _size = 0;
166 }
167
168 const char* name() const { return _name; }
169 Monitor* lock() const { return _lock; }
170
171 void add(CompileTask* task);
172 void remove(CompileTask* task);
173 CompileTask* first() { return _first; }
174 CompileTask* last() { return _last; }
175
176 CompileTask* get();
177
178 bool is_empty() const { return _first == NULL; }
179 int size() const { return _size; }
180
181 void print();
182 };
183
184 // CompileTaskWrapper
185 //
186 // Assign this task to the current thread. Deallocate the task
187 // when the compilation is complete.
188 class CompileTaskWrapper : StackObj {
189 public:
190 CompileTaskWrapper(CompileTask* task);
191 ~CompileTaskWrapper();
192 };
193
194
195 // Compilation
196 //
197 // The broker for all compilation requests.
198 class CompileBroker: AllStatic {
199 friend class Threads;
200 friend class CompileTaskWrapper;
201
202 public:
203 enum {
204 name_buffer_length = 100
205 };
206
207 // Compile type Information for print_last_compile() and CompilerCounters
208 enum { no_compile, normal_compile, osr_compile, native_compile };
209
210 private:
211 static bool _initialized;
212 static volatile bool _should_block;
213
214 // This flag can be used to stop compilation or turn it back on
215 static volatile jint _should_compile_new_jobs;
216
217 // The installed compiler(s)
218 static AbstractCompiler* _compilers[2];
219
220 // These counters are used for assigning id's to each compilation
221 static uint _compilation_id;
222 static uint _osr_compilation_id;
223 static uint _native_compilation_id;
224
225 static int _last_compile_type;
226 static int _last_compile_level;
227 static char _last_method_compiled[name_buffer_length];
228
229 static CompileQueue* _c2_method_queue;
230 static CompileQueue* _c1_method_queue;
231 static CompileTask* _task_free_list;
232
233 static GrowableArray<CompilerThread*>* _method_threads;
234
235 // performance counters
236 static PerfCounter* _perf_total_compilation;
237 static PerfCounter* _perf_native_compilation;
238 static PerfCounter* _perf_osr_compilation;
239 static PerfCounter* _perf_standard_compilation;
240
241 static PerfCounter* _perf_total_bailout_count;
242 static PerfCounter* _perf_total_invalidated_count;
243 static PerfCounter* _perf_total_compile_count;
244 static PerfCounter* _perf_total_native_compile_count;
245 static PerfCounter* _perf_total_osr_compile_count;
246 static PerfCounter* _perf_total_standard_compile_count;
247
248 static PerfCounter* _perf_sum_osr_bytes_compiled;
249 static PerfCounter* _perf_sum_standard_bytes_compiled;
250 static PerfCounter* _perf_sum_nmethod_size;
251 static PerfCounter* _perf_sum_nmethod_code_size;
252
253 static PerfStringVariable* _perf_last_method;
254 static PerfStringVariable* _perf_last_failed_method;
255 static PerfStringVariable* _perf_last_invalidated_method;
256 static PerfVariable* _perf_last_compile_type;
257 static PerfVariable* _perf_last_compile_size;
258 static PerfVariable* _perf_last_failed_type;
259 static PerfVariable* _perf_last_invalidated_type;
260
261 // Timers and counters for generating statistics
262 static elapsedTimer _t_total_compilation;
263 static elapsedTimer _t_osr_compilation;
264 static elapsedTimer _t_standard_compilation;
265
266 static int _total_bailout_count;
267 static int _total_invalidated_count;
268 static int _total_compile_count;
269 static int _total_native_compile_count;
270 static int _total_osr_compile_count;
271 static int _total_standard_compile_count;
272
273 static int _sum_osr_bytes_compiled;
274 static int _sum_standard_bytes_compiled;
275 static int _sum_nmethod_size;
276 static int _sum_nmethod_code_size;
277
278 static CompilerThread* make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS);
279 static void init_compiler_threads(int c1_compiler_count, int c2_compiler_count);
280 static bool compilation_is_complete (methodHandle method, int osr_bci, int comp_level);
281 static bool compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level);
282 static uint assign_compile_id (methodHandle method, int osr_bci);
283 static bool is_compile_blocking (methodHandle method, int osr_bci);
284 static void preload_classes (methodHandle method, TRAPS);
285
286 static CompileTask* create_compile_task(CompileQueue* queue,
287 int compile_id,
288 methodHandle method,
289 int osr_bci,
290 int comp_level,
291 methodHandle hot_method,
292 int hot_count,
293 const char* comment,
294 bool blocking);
295 static CompileTask* allocate_task();
296 static void free_task(CompileTask* task);
297 static void wait_for_completion(CompileTask* task);
298
299 static void invoke_compiler_on_method(CompileTask* task);
300 static void set_last_compile(CompilerThread *thread, methodHandle method, bool is_osr, int comp_level);
301 static void push_jni_handle_block();
302 static void pop_jni_handle_block();
303 static bool check_break_at(methodHandle method, int compile_id, bool is_osr);
304 static void collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task);
305
306 static void compile_method_base(methodHandle method,
307 int osr_bci,
308 int comp_level,
309 methodHandle hot_method,
310 int hot_count,
311 const char* comment,
312 TRAPS);
313 static CompileQueue* compile_queue(int comp_level) {
314 if (is_c2_compile(comp_level)) return _c2_method_queue;
315 if (is_c1_compile(comp_level)) return _c1_method_queue;
316 return NULL;
317 }
318 public:
319 enum {
320 // The entry bci used for non-OSR compilations.
321 standard_entry_bci = InvocationEntryBci
322 };
323
324 static AbstractCompiler* compiler(int comp_level) {
325 if (is_c2_compile(comp_level)) return _compilers[1]; // C2
326 if (is_c1_compile(comp_level)) return _compilers[0]; // C1
327 return NULL;
328 }
329
330 static bool compilation_is_in_queue(methodHandle method, int osr_bci);
331 static int queue_size(int comp_level) {
332 CompileQueue *q = compile_queue(comp_level);
333 return q != NULL ? q->size() : 0;
334 }
335 static void compilation_init();
336 static void init_compiler_thread_log();
337 static nmethod* compile_method(methodHandle method,
338 int osr_bci,
339 int comp_level,
340 methodHandle hot_method,
341 int hot_count,
342 const char* comment, TRAPS);
343
344 static void compiler_thread_loop();
345
346 static uint get_compilation_id() { return _compilation_id; }
347 static bool is_idle();
348
349 // Set _should_block.
350 // Call this from the VM, with Threads_lock held and a safepoint requested.
351 static void set_should_block();
352
353 // Call this from the compiler at convenient points, to poll for _should_block.
354 static void maybe_block();
355
356 enum {
357 // Flags for toggling compiler activity
358 stop_compilation = 0,
359 run_compilation = 1
360 };
361
362 static bool should_compile_new_jobs() { return UseCompiler && (_should_compile_new_jobs == run_compilation); }
363 static bool set_should_compile_new_jobs(jint new_state) {
364 // Return success if the current caller set it
365 jint old = Atomic::cmpxchg(new_state, &_should_compile_new_jobs, 1-new_state);
366 return (old == (1-new_state));
367 }
368 static void handle_full_code_cache();
369
370 // Return total compilation ticks
371 static jlong total_compilation_ticks() {
372 return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;
373 }
374
375 // Print a detailed accounting of compilation time
376 static void print_times();
377
378 // Debugging output for failure
379 static void print_last_compile();
380
381 static void print_compiler_threads_on(outputStream* st);
382 };