1 /*
2 * Copyright (c) 2013, 2019, 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 "jvm.h"
27 #include "ci/ciMethodData.hpp"
28 #include "ci/ciReplay.hpp"
29 #include "ci/ciSymbol.hpp"
30 #include "ci/ciKlass.hpp"
31 #include "ci/ciUtilities.inline.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "memory/allocation.inline.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/method.inline.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "runtime/fieldDescriptor.inline.hpp"
39 #include "runtime/handles.inline.hpp"
40 #include "utilities/copy.hpp"
41 #include "utilities/macros.hpp"
42
43 #ifndef PRODUCT
44
45 // ciReplay
46
47 typedef struct _ciMethodDataRecord {
48 const char* _klass_name;
49 const char* _method_name;
50 const char* _signature;
51
52 int _state;
53 int _current_mileage;
54
55 intptr_t* _data;
56 char* _orig_data;
57 Klass** _classes;
58 Method** _methods;
59 int* _classes_offsets;
60 int* _methods_offsets;
61 int _data_length;
62 int _orig_data_length;
63 int _classes_length;
64 int _methods_length;
65 } ciMethodDataRecord;
66
67 typedef struct _ciMethodRecord {
68 const char* _klass_name;
69 const char* _method_name;
70 const char* _signature;
71
72 int _instructions_size;
73 int _interpreter_invocation_count;
74 int _interpreter_throwout_count;
75 int _invocation_counter;
76 int _backedge_counter;
77 } ciMethodRecord;
78
79 typedef struct _ciInlineRecord {
80 const char* _klass_name;
81 const char* _method_name;
82 const char* _signature;
83
84 int _inline_depth;
85 int _inline_bci;
86 } ciInlineRecord;
87
88 class CompileReplay;
89 static CompileReplay* replay_state;
90
91 class CompileReplay : public StackObj {
92 private:
93 FILE* _stream;
94 Thread* _thread;
95 Handle _protection_domain;
96 Handle _loader;
97
98 GrowableArray<ciMethodRecord*> _ci_method_records;
99 GrowableArray<ciMethodDataRecord*> _ci_method_data_records;
100
101 // Use pointer because we may need to return inline records
102 // without destroying them.
103 GrowableArray<ciInlineRecord*>* _ci_inline_records;
104
105 const char* _error_message;
106
107 char* _bufptr;
108 char* _buffer;
109 int _buffer_length;
110 int _buffer_pos;
111
112 // "compile" data
113 ciKlass* _iklass;
114 Method* _imethod;
115 int _entry_bci;
116 int _comp_level;
117
118 public:
119 CompileReplay(const char* filename, TRAPS) {
120 _thread = THREAD;
121 _loader = Handle(_thread, SystemDictionary::java_system_loader());
122 _protection_domain = Handle();
123
124 _stream = fopen(filename, "rt");
125 if (_stream == NULL) {
126 fprintf(stderr, "ERROR: Can't open replay file %s\n", filename);
127 }
128
129 _ci_inline_records = NULL;
130 _error_message = NULL;
131
132 _buffer_length = 32;
133 _buffer = NEW_RESOURCE_ARRAY(char, _buffer_length);
134 _bufptr = _buffer;
135 _buffer_pos = 0;
136
137 _imethod = NULL;
138 _iklass = NULL;
139 _entry_bci = 0;
140 _comp_level = 0;
141
142 test();
143 }
144
145 ~CompileReplay() {
146 if (_stream != NULL) fclose(_stream);
147 }
148
149 void test() {
150 strcpy(_buffer, "1 2 foo 4 bar 0x9 \"this is it\"");
151 _bufptr = _buffer;
152 assert(parse_int("test") == 1, "what");
153 assert(parse_int("test") == 2, "what");
154 assert(strcmp(parse_string(), "foo") == 0, "what");
155 assert(parse_int("test") == 4, "what");
156 assert(strcmp(parse_string(), "bar") == 0, "what");
157 assert(parse_intptr_t("test") == 9, "what");
158 assert(strcmp(parse_quoted_string(), "this is it") == 0, "what");
159 }
160
161 bool had_error() {
162 return _error_message != NULL || _thread->has_pending_exception();
163 }
164
165 bool can_replay() {
166 return !(_stream == NULL || had_error());
167 }
168
169 void report_error(const char* msg) {
170 _error_message = msg;
171 // Restore the _buffer contents for error reporting
172 for (int i = 0; i < _buffer_pos; i++) {
173 if (_buffer[i] == '\0') _buffer[i] = ' ';
174 }
175 }
176
177 int parse_int(const char* label) {
178 if (had_error()) {
179 return 0;
180 }
181
182 int v = 0;
183 int read;
184 if (sscanf(_bufptr, "%i%n", &v, &read) != 1) {
185 report_error(label);
186 } else {
187 _bufptr += read;
188 }
189 return v;
190 }
191
192 intptr_t parse_intptr_t(const char* label) {
193 if (had_error()) {
194 return 0;
195 }
196
197 intptr_t v = 0;
198 int read;
199 if (sscanf(_bufptr, INTPTR_FORMAT "%n", &v, &read) != 1) {
200 report_error(label);
201 } else {
202 _bufptr += read;
203 }
204 return v;
205 }
206
207 void skip_ws() {
208 // Skip any leading whitespace
209 while (*_bufptr == ' ' || *_bufptr == '\t') {
210 _bufptr++;
211 }
212 }
213
214
215 char* scan_and_terminate(char delim) {
216 char* str = _bufptr;
217 while (*_bufptr != delim && *_bufptr != '\0') {
218 _bufptr++;
219 }
220 if (*_bufptr != '\0') {
221 *_bufptr++ = '\0';
222 }
223 if (_bufptr == str) {
224 // nothing here
225 return NULL;
226 }
227 return str;
228 }
229
230 char* parse_string() {
231 if (had_error()) return NULL;
232
233 skip_ws();
234 return scan_and_terminate(' ');
235 }
236
237 char* parse_quoted_string() {
238 if (had_error()) return NULL;
239
240 skip_ws();
241
242 if (*_bufptr == '"') {
243 _bufptr++;
244 return scan_and_terminate('"');
245 } else {
246 return scan_and_terminate(' ');
247 }
248 }
249
250 const char* parse_escaped_string() {
251 char* result = parse_quoted_string();
252 if (result != NULL) {
253 unescape_string(result);
254 }
255 return result;
256 }
257
258 // Look for the tag 'tag' followed by an
259 bool parse_tag_and_count(const char* tag, int& length) {
260 const char* t = parse_string();
261 if (t == NULL) {
262 return false;
263 }
264
265 if (strcmp(tag, t) != 0) {
266 report_error(tag);
267 return false;
268 }
269 length = parse_int("parse_tag_and_count");
270 return !had_error();
271 }
272
273 // Parse a sequence of raw data encoded as bytes and return the
274 // resulting data.
275 char* parse_data(const char* tag, int& length) {
276 int read_size = 0;
277 if (!parse_tag_and_count(tag, read_size)) {
278 return NULL;
279 }
280
281 int actual_size = sizeof(MethodData);
282 char *result = NEW_RESOURCE_ARRAY(char, actual_size);
283 int i = 0;
284 if (read_size != actual_size) {
285 tty->print_cr("Warning: ciMethodData parsing sees MethodData size %i in file, current is %i", read_size,
286 actual_size);
287 // Replay serializes the entire MethodData, but the data is at the end.
288 // If the MethodData instance size has changed, we can pad or truncate in the beginning
289 int padding = actual_size - read_size;
290 if (padding > 0) {
291 // pad missing data with zeros
292 tty->print_cr("- Padding MethodData");
293 for (; i < padding; i++) {
294 result[i] = 0;
295 }
296 } else if (padding < 0) {
297 // drop some data
298 tty->print_cr("- Truncating MethodData");
299 for (int j = 0; j < -padding; j++) {
300 int val = parse_int("data");
301 // discard val
302 }
303 }
304 }
305
306 assert(i < actual_size, "At least some data must remain to be copied");
307 for (; i < actual_size; i++) {
308 int val = parse_int("data");
309 result[i] = val;
310 }
311 length = actual_size;
312 return result;
313 }
314
315 // Parse a standard chunk of data emitted as:
316 // 'tag' <length> # # ...
317 // Where each # is an intptr_t item
318 intptr_t* parse_intptr_data(const char* tag, int& length) {
319 if (!parse_tag_and_count(tag, length)) {
320 return NULL;
321 }
322
323 intptr_t* result = NEW_RESOURCE_ARRAY(intptr_t, length);
324 for (int i = 0; i < length; i++) {
325 skip_ws();
326 intptr_t val = parse_intptr_t("data");
327 result[i] = val;
328 }
329 return result;
330 }
331
332 // Parse a possibly quoted version of a symbol into a symbolOop
333 Symbol* parse_symbol(TRAPS) {
334 const char* str = parse_escaped_string();
335 if (str != NULL) {
336 Symbol* sym = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);
337 return sym;
338 }
339 return NULL;
340 }
341
342 // Parse a valid klass name and look it up
343 Klass* parse_klass(TRAPS) {
344 const char* str = parse_escaped_string();
345 Symbol* klass_name = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);
346 if (klass_name != NULL) {
347 Klass* k = NULL;
348 if (_iklass != NULL) {
349 k = (Klass*)_iklass->find_klass(ciSymbol::make(klass_name->as_C_string()))->constant_encoding();
350 } else {
351 k = SystemDictionary::resolve_or_fail(klass_name, _loader, _protection_domain, true, THREAD);
352 }
353 if (HAS_PENDING_EXCEPTION) {
354 oop throwable = PENDING_EXCEPTION;
355 java_lang_Throwable::print(throwable, tty);
356 tty->cr();
357 report_error(str);
358 if (ReplayIgnoreInitErrors) {
359 CLEAR_PENDING_EXCEPTION;
360 _error_message = NULL;
361 }
362 return NULL;
363 }
364 return k;
365 }
366 return NULL;
367 }
368
369 // Lookup a klass
370 Klass* resolve_klass(const char* klass, TRAPS) {
371 Symbol* klass_name = SymbolTable::lookup(klass, (int)strlen(klass), CHECK_NULL);
372 return SystemDictionary::resolve_or_fail(klass_name, _loader, _protection_domain, true, THREAD);
373 }
374
375 // Parse the standard tuple of <klass> <name> <signature>
376 Method* parse_method(TRAPS) {
377 InstanceKlass* k = (InstanceKlass*)parse_klass(CHECK_NULL);
378 if (k == NULL) {
379 report_error("Can't find holder klass");
380 return NULL;
381 }
382 Symbol* method_name = parse_symbol(CHECK_NULL);
383 Symbol* method_signature = parse_symbol(CHECK_NULL);
384 Method* m = k->find_method(method_name, method_signature);
385 if (m == NULL) {
386 report_error("Can't find method");
387 }
388 return m;
389 }
390
391 int get_line(int c) {
392 while(c != EOF) {
393 if (_buffer_pos + 1 >= _buffer_length) {
394 int new_length = _buffer_length * 2;
395 // Next call will throw error in case of OOM.
396 _buffer = REALLOC_RESOURCE_ARRAY(char, _buffer, _buffer_length, new_length);
397 _buffer_length = new_length;
398 }
399 if (c == '\n') {
400 c = getc(_stream); // get next char
401 break;
402 } else if (c == '\r') {
403 // skip LF
404 } else {
405 _buffer[_buffer_pos++] = c;
406 }
407 c = getc(_stream);
408 }
409 // null terminate it, reset the pointer
410 _buffer[_buffer_pos] = '\0'; // NL or EOF
411 _buffer_pos = 0;
412 _bufptr = _buffer;
413 return c;
414 }
415
416 // Process each line of the replay file executing each command until
417 // the file ends.
418 void process(TRAPS) {
419 int line_no = 1;
420 int c = getc(_stream);
421 while(c != EOF) {
422 c = get_line(c);
423 process_command(THREAD);
424 if (had_error()) {
425 tty->print_cr("Error while parsing line %d: %s\n", line_no, _error_message);
426 if (ReplayIgnoreInitErrors) {
427 CLEAR_PENDING_EXCEPTION;
428 _error_message = NULL;
429 } else {
430 return;
431 }
432 }
433 line_no++;
434 }
435 }
436
437 void process_command(TRAPS) {
438 char* cmd = parse_string();
439 if (cmd == NULL) {
440 return;
441 }
442 if (strcmp("#", cmd) == 0) {
443 // ignore
444 } else if (strcmp("compile", cmd) == 0) {
445 process_compile(CHECK);
446 } else if (strcmp("ciMethod", cmd) == 0) {
447 process_ciMethod(CHECK);
448 } else if (strcmp("ciMethodData", cmd) == 0) {
449 process_ciMethodData(CHECK);
450 } else if (strcmp("staticfield", cmd) == 0) {
451 process_staticfield(CHECK);
452 } else if (strcmp("ciInstanceKlass", cmd) == 0) {
453 process_ciInstanceKlass(CHECK);
454 } else if (strcmp("instanceKlass", cmd) == 0) {
455 process_instanceKlass(CHECK);
456 #if INCLUDE_JVMTI
457 } else if (strcmp("JvmtiExport", cmd) == 0) {
458 process_JvmtiExport(CHECK);
459 #endif // INCLUDE_JVMTI
460 } else {
461 report_error("unknown command");
462 }
463 }
464
465 // validation of comp_level
466 bool is_valid_comp_level(int comp_level) {
467 const int msg_len = 256;
468 char* msg = NULL;
469 if (!is_compile(comp_level)) {
470 msg = NEW_RESOURCE_ARRAY(char, msg_len);
471 jio_snprintf(msg, msg_len, "%d isn't compilation level", comp_level);
472 } else if (!TieredCompilation && (comp_level != CompLevel_highest_tier)) {
473 msg = NEW_RESOURCE_ARRAY(char, msg_len);
474 switch (comp_level) {
475 case CompLevel_simple:
476 jio_snprintf(msg, msg_len, "compilation level %d requires Client VM or TieredCompilation", comp_level);
477 break;
478 case CompLevel_full_optimization:
479 jio_snprintf(msg, msg_len, "compilation level %d requires Server VM", comp_level);
480 break;
481 default:
482 jio_snprintf(msg, msg_len, "compilation level %d requires TieredCompilation", comp_level);
483 }
484 }
485 if (msg != NULL) {
486 report_error(msg);
487 return false;
488 }
489 return true;
490 }
491
492 // compile <klass> <name> <signature> <entry_bci> <comp_level> inline <count> <depth> <bci> <klass> <name> <signature> ...
493 void* process_inline(ciMethod* imethod, Method* m, int entry_bci, int comp_level, TRAPS) {
494 _imethod = m;
495 _iklass = imethod->holder();
496 _entry_bci = entry_bci;
497 _comp_level = comp_level;
498 int line_no = 1;
499 int c = getc(_stream);
500 while(c != EOF) {
501 c = get_line(c);
502 // Expecting only lines with "compile" command in inline replay file.
503 char* cmd = parse_string();
504 if (cmd == NULL || strcmp("compile", cmd) != 0) {
505 return NULL;
506 }
507 process_compile(CHECK_NULL);
508 if (had_error()) {
509 tty->print_cr("Error while parsing line %d: %s\n", line_no, _error_message);
510 tty->print_cr("%s", _buffer);
511 return NULL;
512 }
513 if (_ci_inline_records != NULL && _ci_inline_records->length() > 0) {
514 // Found inlining record for the requested method.
515 return _ci_inline_records;
516 }
517 line_no++;
518 }
519 return NULL;
520 }
521
522 // compile <klass> <name> <signature> <entry_bci> <comp_level> inline <count> <depth> <bci> <klass> <name> <signature> ...
523 void process_compile(TRAPS) {
524 Method* method = parse_method(CHECK);
525 if (had_error()) return;
526 int entry_bci = parse_int("entry_bci");
527 const char* comp_level_label = "comp_level";
528 int comp_level = parse_int(comp_level_label);
529 // old version w/o comp_level
530 if (had_error() && (error_message() == comp_level_label)) {
531 // use highest available tier
532 comp_level = TieredCompilation ? TieredStopAtLevel : CompLevel_highest_tier;
533 }
534 if (!is_valid_comp_level(comp_level)) {
535 return;
536 }
537 if (_imethod != NULL) {
538 // Replay Inlining
539 if (entry_bci != _entry_bci || comp_level != _comp_level) {
540 return;
541 }
542 const char* iklass_name = _imethod->method_holder()->name()->as_utf8();
543 const char* imethod_name = _imethod->name()->as_utf8();
544 const char* isignature = _imethod->signature()->as_utf8();
545 const char* klass_name = method->method_holder()->name()->as_utf8();
546 const char* method_name = method->name()->as_utf8();
547 const char* signature = method->signature()->as_utf8();
548 if (strcmp(iklass_name, klass_name) != 0 ||
549 strcmp(imethod_name, method_name) != 0 ||
550 strcmp(isignature, signature) != 0) {
551 return;
552 }
553 }
554 int inline_count = 0;
555 if (parse_tag_and_count("inline", inline_count)) {
556 // Record inlining data
557 _ci_inline_records = new GrowableArray<ciInlineRecord*>();
558 for (int i = 0; i < inline_count; i++) {
559 int depth = parse_int("inline_depth");
560 int bci = parse_int("inline_bci");
561 if (had_error()) {
562 break;
563 }
564 Method* inl_method = parse_method(CHECK);
565 if (had_error()) {
566 break;
567 }
568 new_ciInlineRecord(inl_method, bci, depth);
569 }
570 }
571 if (_imethod != NULL) {
572 return; // Replay Inlining
573 }
574 InstanceKlass* ik = method->method_holder();
575 ik->initialize(THREAD);
576 if (HAS_PENDING_EXCEPTION) {
577 oop throwable = PENDING_EXCEPTION;
578 java_lang_Throwable::print(throwable, tty);
579 tty->cr();
580 if (ReplayIgnoreInitErrors) {
581 CLEAR_PENDING_EXCEPTION;
582 ik->set_init_state(InstanceKlass::fully_initialized);
583 } else {
584 return;
585 }
586 }
587 // Make sure the existence of a prior compile doesn't stop this one
588 CompiledMethod* nm = (entry_bci != InvocationEntryBci) ? method->lookup_osr_nmethod_for(entry_bci, comp_level, true) : method->code();
589 if (nm != NULL) {
590 nm->make_not_entrant();
591 }
592 replay_state = this;
593 CompileBroker::compile_method(method, entry_bci, comp_level,
594 methodHandle(), 0, CompileTask::Reason_Replay, THREAD);
595 replay_state = NULL;
596 reset();
597 }
598
599 // ciMethod <klass> <name> <signature> <invocation_counter> <backedge_counter> <interpreter_invocation_count> <interpreter_throwout_count> <instructions_size>
600 //
601 //
602 void process_ciMethod(TRAPS) {
603 Method* method = parse_method(CHECK);
604 if (had_error()) return;
605 ciMethodRecord* rec = new_ciMethod(method);
606 rec->_invocation_counter = parse_int("invocation_counter");
607 rec->_backedge_counter = parse_int("backedge_counter");
608 rec->_interpreter_invocation_count = parse_int("interpreter_invocation_count");
609 rec->_interpreter_throwout_count = parse_int("interpreter_throwout_count");
610 rec->_instructions_size = parse_int("instructions_size");
611 }
612
613 // ciMethodData <klass> <name> <signature> <state> <current mileage> orig <length> # # ... data <length> # # ... oops <length> # ... methods <length>
614 void process_ciMethodData(TRAPS) {
615 Method* method = parse_method(CHECK);
616 if (had_error()) return;
617 /* just copied from Method, to build interpret data*/
618
619 // To be properly initialized, some profiling in the MDO needs the
620 // method to be rewritten (number of arguments at a call for
621 // instance)
622 method->method_holder()->link_class(CHECK);
623 // methodOopDesc::build_interpreter_method_data(method, CHECK);
624 {
625 // Grab a lock here to prevent multiple
626 // MethodData*s from being created.
627 MutexLocker ml(MethodData_lock, THREAD);
628 if (method->method_data() == NULL) {
629 ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
630 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK);
631 method->set_method_data(method_data);
632 }
633 }
634
635 // collect and record all the needed information for later
636 ciMethodDataRecord* rec = new_ciMethodData(method);
637 rec->_state = parse_int("state");
638 rec->_current_mileage = parse_int("current_mileage");
639
640 rec->_orig_data = parse_data("orig", rec->_orig_data_length);
641 if (rec->_orig_data == NULL) {
642 return;
643 }
644 rec->_data = parse_intptr_data("data", rec->_data_length);
645 if (rec->_data == NULL) {
646 return;
647 }
648 if (!parse_tag_and_count("oops", rec->_classes_length)) {
649 return;
650 }
651 rec->_classes = NEW_RESOURCE_ARRAY(Klass*, rec->_classes_length);
652 rec->_classes_offsets = NEW_RESOURCE_ARRAY(int, rec->_classes_length);
653 for (int i = 0; i < rec->_classes_length; i++) {
654 int offset = parse_int("offset");
655 if (had_error()) {
656 return;
657 }
658 Klass* k = parse_klass(CHECK);
659 rec->_classes_offsets[i] = offset;
660 rec->_classes[i] = k;
661 }
662
663 if (!parse_tag_and_count("methods", rec->_methods_length)) {
664 return;
665 }
666 rec->_methods = NEW_RESOURCE_ARRAY(Method*, rec->_methods_length);
667 rec->_methods_offsets = NEW_RESOURCE_ARRAY(int, rec->_methods_length);
668 for (int i = 0; i < rec->_methods_length; i++) {
669 int offset = parse_int("offset");
670 if (had_error()) {
671 return;
672 }
673 Method* m = parse_method(CHECK);
674 rec->_methods_offsets[i] = offset;
675 rec->_methods[i] = m;
676 }
677 }
678
679 // instanceKlass <name>
680 //
681 // Loads and initializes the klass 'name'. This can be used to
682 // create particular class loading environments
683 void process_instanceKlass(TRAPS) {
684 // just load the referenced class
685 Klass* k = parse_klass(CHECK);
686 }
687
688 // ciInstanceKlass <name> <is_linked> <is_initialized> <length> tag # # # ...
689 //
690 // Load the klass 'name' and link or initialize it. Verify that the
691 // constant pool is the same length as 'length' and make sure the
692 // constant pool tags are in the same state.
693 void process_ciInstanceKlass(TRAPS) {
694 InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
695 if (k == NULL) {
696 return;
697 }
698 int is_linked = parse_int("is_linked");
699 int is_initialized = parse_int("is_initialized");
700 int length = parse_int("length");
701 if (is_initialized) {
702 k->initialize(THREAD);
703 if (HAS_PENDING_EXCEPTION) {
704 oop throwable = PENDING_EXCEPTION;
705 java_lang_Throwable::print(throwable, tty);
706 tty->cr();
707 if (ReplayIgnoreInitErrors) {
708 CLEAR_PENDING_EXCEPTION;
709 k->set_init_state(InstanceKlass::fully_initialized);
710 } else {
711 return;
712 }
713 }
714 } else if (is_linked) {
715 k->link_class(CHECK);
716 }
717 ConstantPool* cp = k->constants();
718 if (length != cp->length()) {
719 report_error("constant pool length mismatch: wrong class files?");
720 return;
721 }
722
723 int parsed_two_word = 0;
724 for (int i = 1; i < length; i++) {
725 int tag = parse_int("tag");
726 if (had_error()) {
727 return;
728 }
729 switch (cp->tag_at(i).value()) {
730 case JVM_CONSTANT_UnresolvedClass: {
731 if (tag == JVM_CONSTANT_Class) {
732 tty->print_cr("Resolving klass %s at %d", cp->klass_name_at(i)->as_utf8(), i);
733 Klass* k = cp->klass_at(i, CHECK);
734 }
735 break;
736 }
737 case JVM_CONSTANT_Long:
738 case JVM_CONSTANT_Double:
739 parsed_two_word = i + 1;
740
741 case JVM_CONSTANT_ClassIndex:
742 case JVM_CONSTANT_StringIndex:
743 case JVM_CONSTANT_String:
744 case JVM_CONSTANT_UnresolvedClassInError:
745 case JVM_CONSTANT_Fieldref:
746 case JVM_CONSTANT_Methodref:
747 case JVM_CONSTANT_InterfaceMethodref:
748 case JVM_CONSTANT_NameAndType:
749 case JVM_CONSTANT_Utf8:
750 case JVM_CONSTANT_Integer:
751 case JVM_CONSTANT_Float:
752 case JVM_CONSTANT_MethodHandle:
753 case JVM_CONSTANT_MethodType:
754 case JVM_CONSTANT_Dynamic:
755 case JVM_CONSTANT_InvokeDynamic:
756 if (tag != cp->tag_at(i).value()) {
757 report_error("tag mismatch: wrong class files?");
758 return;
759 }
760 break;
761
762 case JVM_CONSTANT_Class:
763 if (tag == JVM_CONSTANT_Class) {
764 } else if (tag == JVM_CONSTANT_UnresolvedClass) {
765 tty->print_cr("Warning: entry was unresolved in the replay data");
766 } else {
767 report_error("Unexpected tag");
768 return;
769 }
770 break;
771
772 case 0:
773 if (parsed_two_word == i) continue;
774
775 default:
776 fatal("Unexpected tag: %d", cp->tag_at(i).value());
777 break;
778 }
779
780 }
781 }
782
783 // Initialize a class and fill in the value for a static field.
784 // This is useful when the compile was dependent on the value of
785 // static fields but it's impossible to properly rerun the static
786 // initiailizer.
787 void process_staticfield(TRAPS) {
788 InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
789
790 if (k == NULL || ReplaySuppressInitializers == 0 ||
791 (ReplaySuppressInitializers == 2 && k->class_loader() == NULL)) {
792 return;
793 }
794
795 assert(k->is_initialized(), "must be");
796
797 const char* field_name = parse_escaped_string();
798 const char* field_signature = parse_string();
799 fieldDescriptor fd;
800 Symbol* name = SymbolTable::lookup(field_name, (int)strlen(field_name), CHECK);
801 Symbol* sig = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);
802 if (!k->find_local_field(name, sig, &fd) ||
803 !fd.is_static() ||
804 fd.has_initial_value()) {
805 report_error(field_name);
806 return;
807 }
808
809 oop java_mirror = k->java_mirror();
810 if (field_signature[0] == '[') {
811 int length = parse_int("array length");
812 oop value = NULL;
813
814 if (field_signature[1] == '[') {
815 // multi dimensional array
816 ArrayKlass* kelem = (ArrayKlass *)parse_klass(CHECK);
817 if (kelem == NULL) {
818 return;
819 }
820 int rank = 0;
821 while (field_signature[rank] == '[') {
822 rank++;
823 }
824 jint* dims = NEW_RESOURCE_ARRAY(jint, rank);
825 dims[0] = length;
826 for (int i = 1; i < rank; i++) {
827 dims[i] = 1; // These aren't relevant to the compiler
828 }
829 value = kelem->multi_allocate(rank, dims, CHECK);
830 } else {
831 if (strcmp(field_signature, "[B") == 0) {
832 value = oopFactory::new_byteArray(length, CHECK);
833 } else if (strcmp(field_signature, "[Z") == 0) {
834 value = oopFactory::new_boolArray(length, CHECK);
835 } else if (strcmp(field_signature, "[C") == 0) {
836 value = oopFactory::new_charArray(length, CHECK);
837 } else if (strcmp(field_signature, "[S") == 0) {
838 value = oopFactory::new_shortArray(length, CHECK);
839 } else if (strcmp(field_signature, "[F") == 0) {
840 value = oopFactory::new_floatArray(length, CHECK);
841 } else if (strcmp(field_signature, "[D") == 0) {
842 value = oopFactory::new_doubleArray(length, CHECK);
843 } else if (strcmp(field_signature, "[I") == 0) {
844 value = oopFactory::new_intArray(length, CHECK);
845 } else if (strcmp(field_signature, "[J") == 0) {
846 value = oopFactory::new_longArray(length, CHECK);
847 } else if (field_signature[0] == '[' && field_signature[1] == 'L') {
848 Klass* kelem = resolve_klass(field_signature + 1, CHECK);
849 value = oopFactory::new_objArray(kelem, length, CHECK);
850 } else {
851 report_error("unhandled array staticfield");
852 }
853 }
854 java_mirror->obj_field_put(fd.offset(), value);
855 } else {
856 const char* string_value = parse_escaped_string();
857 if (strcmp(field_signature, "I") == 0) {
858 int value = atoi(string_value);
859 java_mirror->int_field_put(fd.offset(), value);
860 } else if (strcmp(field_signature, "B") == 0) {
861 int value = atoi(string_value);
862 java_mirror->byte_field_put(fd.offset(), value);
863 } else if (strcmp(field_signature, "C") == 0) {
864 int value = atoi(string_value);
865 java_mirror->char_field_put(fd.offset(), value);
866 } else if (strcmp(field_signature, "S") == 0) {
867 int value = atoi(string_value);
868 java_mirror->short_field_put(fd.offset(), value);
869 } else if (strcmp(field_signature, "Z") == 0) {
870 int value = atoi(string_value);
871 java_mirror->bool_field_put(fd.offset(), value);
872 } else if (strcmp(field_signature, "J") == 0) {
873 jlong value;
874 if (sscanf(string_value, JLONG_FORMAT, &value) != 1) {
875 fprintf(stderr, "Error parsing long: %s\n", string_value);
876 return;
877 }
878 java_mirror->long_field_put(fd.offset(), value);
879 } else if (strcmp(field_signature, "F") == 0) {
880 float value = atof(string_value);
881 java_mirror->float_field_put(fd.offset(), value);
882 } else if (strcmp(field_signature, "D") == 0) {
883 double value = atof(string_value);
884 java_mirror->double_field_put(fd.offset(), value);
885 } else if (strcmp(field_signature, "Ljava/lang/String;") == 0) {
886 Handle value = java_lang_String::create_from_str(string_value, CHECK);
887 java_mirror->obj_field_put(fd.offset(), value());
888 } else if (field_signature[0] == 'L') {
889 Klass* k = resolve_klass(string_value, CHECK);
890 oop value = InstanceKlass::cast(k)->allocate_instance(CHECK);
891 java_mirror->obj_field_put(fd.offset(), value);
892 } else {
893 report_error("unhandled staticfield");
894 }
895 }
896 }
897
898 #if INCLUDE_JVMTI
899 void process_JvmtiExport(TRAPS) {
900 const char* field = parse_string();
901 bool value = parse_int("JvmtiExport flag") != 0;
902 if (strcmp(field, "can_access_local_variables") == 0) {
903 JvmtiExport::set_can_access_local_variables(value);
904 } else if (strcmp(field, "can_hotswap_or_post_breakpoint") == 0) {
905 JvmtiExport::set_can_hotswap_or_post_breakpoint(value);
906 } else if (strcmp(field, "can_post_on_exceptions") == 0) {
907 JvmtiExport::set_can_post_on_exceptions(value);
908 } else {
909 report_error("Unrecognized JvmtiExport directive");
910 }
911 }
912 #endif // INCLUDE_JVMTI
913
914 // Create and initialize a record for a ciMethod
915 ciMethodRecord* new_ciMethod(Method* method) {
916 ciMethodRecord* rec = NEW_RESOURCE_OBJ(ciMethodRecord);
917 rec->_klass_name = method->method_holder()->name()->as_utf8();
918 rec->_method_name = method->name()->as_utf8();
919 rec->_signature = method->signature()->as_utf8();
920 _ci_method_records.append(rec);
921 return rec;
922 }
923
924 // Lookup data for a ciMethod
925 ciMethodRecord* find_ciMethodRecord(Method* method) {
926 const char* klass_name = method->method_holder()->name()->as_utf8();
927 const char* method_name = method->name()->as_utf8();
928 const char* signature = method->signature()->as_utf8();
929 for (int i = 0; i < _ci_method_records.length(); i++) {
930 ciMethodRecord* rec = _ci_method_records.at(i);
931 if (strcmp(rec->_klass_name, klass_name) == 0 &&
932 strcmp(rec->_method_name, method_name) == 0 &&
933 strcmp(rec->_signature, signature) == 0) {
934 return rec;
935 }
936 }
937 return NULL;
938 }
939
940 // Create and initialize a record for a ciMethodData
941 ciMethodDataRecord* new_ciMethodData(Method* method) {
942 ciMethodDataRecord* rec = NEW_RESOURCE_OBJ(ciMethodDataRecord);
943 rec->_klass_name = method->method_holder()->name()->as_utf8();
944 rec->_method_name = method->name()->as_utf8();
945 rec->_signature = method->signature()->as_utf8();
946 _ci_method_data_records.append(rec);
947 return rec;
948 }
949
950 // Lookup data for a ciMethodData
951 ciMethodDataRecord* find_ciMethodDataRecord(Method* method) {
952 const char* klass_name = method->method_holder()->name()->as_utf8();
953 const char* method_name = method->name()->as_utf8();
954 const char* signature = method->signature()->as_utf8();
955 for (int i = 0; i < _ci_method_data_records.length(); i++) {
956 ciMethodDataRecord* rec = _ci_method_data_records.at(i);
957 if (strcmp(rec->_klass_name, klass_name) == 0 &&
958 strcmp(rec->_method_name, method_name) == 0 &&
959 strcmp(rec->_signature, signature) == 0) {
960 return rec;
961 }
962 }
963 return NULL;
964 }
965
966 // Create and initialize a record for a ciInlineRecord
967 ciInlineRecord* new_ciInlineRecord(Method* method, int bci, int depth) {
968 ciInlineRecord* rec = NEW_RESOURCE_OBJ(ciInlineRecord);
969 rec->_klass_name = method->method_holder()->name()->as_utf8();
970 rec->_method_name = method->name()->as_utf8();
971 rec->_signature = method->signature()->as_utf8();
972 rec->_inline_bci = bci;
973 rec->_inline_depth = depth;
974 _ci_inline_records->append(rec);
975 return rec;
976 }
977
978 // Lookup inlining data for a ciMethod
979 ciInlineRecord* find_ciInlineRecord(Method* method, int bci, int depth) {
980 if (_ci_inline_records != NULL) {
981 return find_ciInlineRecord(_ci_inline_records, method, bci, depth);
982 }
983 return NULL;
984 }
985
986 static ciInlineRecord* find_ciInlineRecord(GrowableArray<ciInlineRecord*>* records,
987 Method* method, int bci, int depth) {
988 if (records != NULL) {
989 const char* klass_name = method->method_holder()->name()->as_utf8();
990 const char* method_name = method->name()->as_utf8();
991 const char* signature = method->signature()->as_utf8();
992 for (int i = 0; i < records->length(); i++) {
993 ciInlineRecord* rec = records->at(i);
994 if ((rec->_inline_bci == bci) &&
995 (rec->_inline_depth == depth) &&
996 (strcmp(rec->_klass_name, klass_name) == 0) &&
997 (strcmp(rec->_method_name, method_name) == 0) &&
998 (strcmp(rec->_signature, signature) == 0)) {
999 return rec;
1000 }
1001 }
1002 }
1003 return NULL;
1004 }
1005
1006 const char* error_message() {
1007 return _error_message;
1008 }
1009
1010 void reset() {
1011 _error_message = NULL;
1012 _ci_method_records.clear();
1013 _ci_method_data_records.clear();
1014 }
1015
1016 // Take an ascii string contain \u#### escapes and convert it to utf8
1017 // in place.
1018 static void unescape_string(char* value) {
1019 char* from = value;
1020 char* to = value;
1021 while (*from != '\0') {
1022 if (*from != '\\') {
1023 *from++ = *to++;
1024 } else {
1025 switch (from[1]) {
1026 case 'u': {
1027 from += 2;
1028 jchar value=0;
1029 for (int i=0; i<4; i++) {
1030 char c = *from++;
1031 switch (c) {
1032 case '0': case '1': case '2': case '3': case '4':
1033 case '5': case '6': case '7': case '8': case '9':
1034 value = (value << 4) + c - '0';
1035 break;
1036 case 'a': case 'b': case 'c':
1037 case 'd': case 'e': case 'f':
1038 value = (value << 4) + 10 + c - 'a';
1039 break;
1040 case 'A': case 'B': case 'C':
1041 case 'D': case 'E': case 'F':
1042 value = (value << 4) + 10 + c - 'A';
1043 break;
1044 default:
1045 ShouldNotReachHere();
1046 }
1047 }
1048 UNICODE::convert_to_utf8(&value, 1, to);
1049 to++;
1050 break;
1051 }
1052 case 't': *to++ = '\t'; from += 2; break;
1053 case 'n': *to++ = '\n'; from += 2; break;
1054 case 'r': *to++ = '\r'; from += 2; break;
1055 case 'f': *to++ = '\f'; from += 2; break;
1056 default:
1057 ShouldNotReachHere();
1058 }
1059 }
1060 }
1061 *from = *to;
1062 }
1063 };
1064
1065 void ciReplay::replay(TRAPS) {
1066 int exit_code = replay_impl(THREAD);
1067
1068 Threads::destroy_vm();
1069
1070 vm_exit(exit_code);
1071 }
1072
1073 void* ciReplay::load_inline_data(ciMethod* method, int entry_bci, int comp_level) {
1074 if (FLAG_IS_DEFAULT(InlineDataFile)) {
1075 tty->print_cr("ERROR: no inline replay data file specified (use -XX:InlineDataFile=inline_pid12345.txt).");
1076 return NULL;
1077 }
1078
1079 VM_ENTRY_MARK;
1080 // Load and parse the replay data
1081 CompileReplay rp(InlineDataFile, THREAD);
1082 if (!rp.can_replay()) {
1083 tty->print_cr("ciReplay: !rp.can_replay()");
1084 return NULL;
1085 }
1086 void* data = rp.process_inline(method, method->get_Method(), entry_bci, comp_level, THREAD);
1087 if (HAS_PENDING_EXCEPTION) {
1088 Handle throwable(THREAD, PENDING_EXCEPTION);
1089 CLEAR_PENDING_EXCEPTION;
1090 java_lang_Throwable::print_stack_trace(throwable, tty);
1091 tty->cr();
1092 return NULL;
1093 }
1094
1095 if (rp.had_error()) {
1096 tty->print_cr("ciReplay: Failed on %s", rp.error_message());
1097 return NULL;
1098 }
1099 return data;
1100 }
1101
1102 int ciReplay::replay_impl(TRAPS) {
1103 HandleMark hm;
1104 ResourceMark rm;
1105
1106 if (ReplaySuppressInitializers > 2) {
1107 // ReplaySuppressInitializers > 2 means that we want to allow
1108 // normal VM bootstrap but once we get into the replay itself
1109 // don't allow any intializers to be run.
1110 ReplaySuppressInitializers = 1;
1111 }
1112
1113 if (FLAG_IS_DEFAULT(ReplayDataFile)) {
1114 tty->print_cr("ERROR: no compiler replay data file specified (use -XX:ReplayDataFile=replay_pid12345.txt).");
1115 return 1;
1116 }
1117
1118 // Load and parse the replay data
1119 CompileReplay rp(ReplayDataFile, THREAD);
1120 int exit_code = 0;
1121 if (rp.can_replay()) {
1122 rp.process(THREAD);
1123 } else {
1124 exit_code = 1;
1125 return exit_code;
1126 }
1127
1128 if (HAS_PENDING_EXCEPTION) {
1129 Handle throwable(THREAD, PENDING_EXCEPTION);
1130 CLEAR_PENDING_EXCEPTION;
1131 java_lang_Throwable::print_stack_trace(throwable, tty);
1132 tty->cr();
1133 exit_code = 2;
1134 }
1135
1136 if (rp.had_error()) {
1137 tty->print_cr("Failed on %s", rp.error_message());
1138 exit_code = 1;
1139 }
1140 return exit_code;
1141 }
1142
1143 void ciReplay::initialize(ciMethodData* m) {
1144 if (replay_state == NULL) {
1145 return;
1146 }
1147
1148 ASSERT_IN_VM;
1149 ResourceMark rm;
1150
1151 Method* method = m->get_MethodData()->method();
1152 ciMethodDataRecord* rec = replay_state->find_ciMethodDataRecord(method);
1153 if (rec == NULL) {
1154 // This indicates some mismatch with the original environment and
1155 // the replay environment though it's not always enough to
1156 // interfere with reproducing a bug
1157 tty->print_cr("Warning: requesting ciMethodData record for method with no data: ");
1158 method->print_name(tty);
1159 tty->cr();
1160 } else {
1161 m->_state = rec->_state;
1162 m->_current_mileage = rec->_current_mileage;
1163 if (rec->_data_length != 0) {
1164 assert(m->_data_size + m->_extra_data_size == rec->_data_length * (int)sizeof(rec->_data[0]) ||
1165 m->_data_size == rec->_data_length * (int)sizeof(rec->_data[0]), "must agree");
1166
1167 // Write the correct ciObjects back into the profile data
1168 ciEnv* env = ciEnv::current();
1169 for (int i = 0; i < rec->_classes_length; i++) {
1170 Klass *k = rec->_classes[i];
1171 // In case this class pointer is is tagged, preserve the tag bits
1172 intptr_t status = 0;
1173 if (k != NULL) {
1174 status = ciTypeEntries::with_status(env->get_metadata(k)->as_klass(), rec->_data[rec->_classes_offsets[i]]);
1175 }
1176 rec->_data[rec->_classes_offsets[i]] = status;
1177 }
1178 for (int i = 0; i < rec->_methods_length; i++) {
1179 Method *m = rec->_methods[i];
1180 *(ciMetadata**)(rec->_data + rec->_methods_offsets[i]) =
1181 env->get_metadata(m);
1182 }
1183 // Copy the updated profile data into place as intptr_ts
1184 #ifdef _LP64
1185 Copy::conjoint_jlongs_atomic((jlong *)rec->_data, (jlong *)m->_data, rec->_data_length);
1186 #else
1187 Copy::conjoint_jints_atomic((jint *)rec->_data, (jint *)m->_data, rec->_data_length);
1188 #endif
1189 }
1190
1191 // copy in the original header
1192 Copy::conjoint_jbytes(rec->_orig_data, (char*)&m->_orig, rec->_orig_data_length);
1193 }
1194 }
1195
1196
1197 bool ciReplay::should_not_inline(ciMethod* method) {
1198 if (replay_state == NULL) {
1199 return false;
1200 }
1201 VM_ENTRY_MARK;
1202 // ciMethod without a record shouldn't be inlined.
1203 return replay_state->find_ciMethodRecord(method->get_Method()) == NULL;
1204 }
1205
1206 bool ciReplay::should_inline(void* data, ciMethod* method, int bci, int inline_depth) {
1207 if (data != NULL) {
1208 GrowableArray<ciInlineRecord*>* records = (GrowableArray<ciInlineRecord*>*)data;
1209 VM_ENTRY_MARK;
1210 // Inline record are ordered by bci and depth.
1211 return CompileReplay::find_ciInlineRecord(records, method->get_Method(), bci, inline_depth) != NULL;
1212 } else if (replay_state != NULL) {
1213 VM_ENTRY_MARK;
1214 // Inline record are ordered by bci and depth.
1215 return replay_state->find_ciInlineRecord(method->get_Method(), bci, inline_depth) != NULL;
1216 }
1217 return false;
1218 }
1219
1220 bool ciReplay::should_not_inline(void* data, ciMethod* method, int bci, int inline_depth) {
1221 if (data != NULL) {
1222 GrowableArray<ciInlineRecord*>* records = (GrowableArray<ciInlineRecord*>*)data;
1223 VM_ENTRY_MARK;
1224 // Inline record are ordered by bci and depth.
1225 return CompileReplay::find_ciInlineRecord(records, method->get_Method(), bci, inline_depth) == NULL;
1226 } else if (replay_state != NULL) {
1227 VM_ENTRY_MARK;
1228 // Inline record are ordered by bci and depth.
1229 return replay_state->find_ciInlineRecord(method->get_Method(), bci, inline_depth) == NULL;
1230 }
1231 return false;
1232 }
1233
1234 void ciReplay::initialize(ciMethod* m) {
1235 if (replay_state == NULL) {
1236 return;
1237 }
1238
1239 ASSERT_IN_VM;
1240 ResourceMark rm;
1241
1242 Method* method = m->get_Method();
1243 ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
1244 if (rec == NULL) {
1245 // This indicates some mismatch with the original environment and
1246 // the replay environment though it's not always enough to
1247 // interfere with reproducing a bug
1248 tty->print_cr("Warning: requesting ciMethod record for method with no data: ");
1249 method->print_name(tty);
1250 tty->cr();
1251 } else {
1252 EXCEPTION_CONTEXT;
1253 // m->_instructions_size = rec->_instructions_size;
1254 m->_instructions_size = -1;
1255 m->_interpreter_invocation_count = rec->_interpreter_invocation_count;
1256 m->_interpreter_throwout_count = rec->_interpreter_throwout_count;
1257 MethodCounters* mcs = method->get_method_counters(CHECK_AND_CLEAR);
1258 guarantee(mcs != NULL, "method counters allocation failed");
1259 mcs->invocation_counter()->_counter = rec->_invocation_counter;
1260 mcs->backedge_counter()->_counter = rec->_backedge_counter;
1261 }
1262 }
1263
1264 bool ciReplay::is_loaded(Method* method) {
1265 if (replay_state == NULL) {
1266 return true;
1267 }
1268
1269 ASSERT_IN_VM;
1270 ResourceMark rm;
1271
1272 ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
1273 return rec != NULL;
1274 }
1275 #endif // PRODUCT