Wed, 23 Oct 2013 12:40:23 +0200
8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti
1 /* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
24 #include "precompiled.hpp"
25 #include "ci/ciMethodData.hpp"
26 #include "ci/ciReplay.hpp"
27 #include "ci/ciUtilities.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "memory/oopFactory.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "utilities/copy.hpp"
33 #include "utilities/macros.hpp"
35 #ifndef PRODUCT
37 // ciReplay
39 typedef struct _ciMethodDataRecord {
40 const char* klass;
41 const char* method;
42 const char* signature;
43 int state;
44 int current_mileage;
45 intptr_t* data;
46 int data_length;
47 char* orig_data;
48 int orig_data_length;
49 int oops_length;
50 jobject* oops_handles;
51 int* oops_offsets;
52 } ciMethodDataRecord;
54 typedef struct _ciMethodRecord {
55 const char* klass;
56 const char* method;
57 const char* signature;
58 int instructions_size;
59 int interpreter_invocation_count;
60 int interpreter_throwout_count;
61 int invocation_counter;
62 int backedge_counter;
63 } ciMethodRecord;
65 class CompileReplay;
66 static CompileReplay* replay_state;
68 class CompileReplay : public StackObj {
69 private:
70 FILE* stream;
71 Thread* thread;
72 Handle protection_domain;
73 Handle loader;
75 GrowableArray<ciMethodRecord*> ci_method_records;
76 GrowableArray<ciMethodDataRecord*> ci_method_data_records;
78 const char* _error_message;
80 char* bufptr;
81 char* buffer;
82 int buffer_length;
83 int buffer_end;
84 int line_no;
86 public:
87 CompileReplay(const char* filename, TRAPS) {
88 thread = THREAD;
89 loader = Handle(thread, SystemDictionary::java_system_loader());
90 stream = fopen(filename, "rt");
91 if (stream == NULL) {
92 fprintf(stderr, "ERROR: Can't open replay file %s\n", filename);
93 }
94 buffer_length = 32;
95 buffer = NEW_RESOURCE_ARRAY(char, buffer_length);
96 _error_message = NULL;
98 test();
99 }
101 ~CompileReplay() {
102 if (stream != NULL) fclose(stream);
103 }
105 void test() {
106 strcpy(buffer, "1 2 foo 4 bar 0x9 \"this is it\"");
107 bufptr = buffer;
108 assert(parse_int("test") == 1, "what");
109 assert(parse_int("test") == 2, "what");
110 assert(strcmp(parse_string(), "foo") == 0, "what");
111 assert(parse_int("test") == 4, "what");
112 assert(strcmp(parse_string(), "bar") == 0, "what");
113 assert(parse_intptr_t("test") == 9, "what");
114 assert(strcmp(parse_quoted_string(), "this is it") == 0, "what");
115 }
117 bool had_error() {
118 return _error_message != NULL || thread->has_pending_exception();
119 }
121 bool can_replay() {
122 return !(stream == NULL || had_error());
123 }
125 void report_error(const char* msg) {
126 _error_message = msg;
127 // Restore the buffer contents for error reporting
128 for (int i = 0; i < buffer_end; i++) {
129 if (buffer[i] == '\0') buffer[i] = ' ';
130 }
131 }
133 int parse_int(const char* label) {
134 if (had_error()) {
135 return 0;
136 }
138 int v = 0;
139 int read;
140 if (sscanf(bufptr, "%i%n", &v, &read) != 1) {
141 report_error(label);
142 } else {
143 bufptr += read;
144 }
145 return v;
146 }
148 intptr_t parse_intptr_t(const char* label) {
149 if (had_error()) {
150 return 0;
151 }
153 intptr_t v = 0;
154 int read;
155 if (sscanf(bufptr, INTPTR_FORMAT "%n", &v, &read) != 1) {
156 report_error(label);
157 } else {
158 bufptr += read;
159 }
160 return v;
161 }
163 void skip_ws() {
164 // Skip any leading whitespace
165 while (*bufptr == ' ' || *bufptr == '\t') {
166 bufptr++;
167 }
168 }
171 char* scan_and_terminate(char delim) {
172 char* str = bufptr;
173 while (*bufptr != delim && *bufptr != '\0') {
174 bufptr++;
175 }
176 if (*bufptr != '\0') {
177 *bufptr++ = '\0';
178 }
179 if (bufptr == str) {
180 // nothing here
181 return NULL;
182 }
183 return str;
184 }
186 char* parse_string() {
187 if (had_error()) return NULL;
189 skip_ws();
190 return scan_and_terminate(' ');
191 }
193 char* parse_quoted_string() {
194 if (had_error()) return NULL;
196 skip_ws();
198 if (*bufptr == '"') {
199 bufptr++;
200 return scan_and_terminate('"');
201 } else {
202 return scan_and_terminate(' ');
203 }
204 }
206 const char* parse_escaped_string() {
207 char* result = parse_quoted_string();
208 if (result != NULL) {
209 unescape_string(result);
210 }
211 return result;
212 }
214 // Look for the tag 'tag' followed by an
215 bool parse_tag_and_count(const char* tag, int& length) {
216 const char* t = parse_string();
217 if (t == NULL) {
218 return false;
219 }
221 if (strcmp(tag, t) != 0) {
222 report_error(tag);
223 return false;
224 }
225 length = parse_int("parse_tag_and_count");
226 return !had_error();
227 }
229 // Parse a sequence of raw data encoded as bytes and return the
230 // resulting data.
231 char* parse_data(const char* tag, int& length) {
232 if (!parse_tag_and_count(tag, length)) {
233 return NULL;
234 }
236 char * result = NEW_RESOURCE_ARRAY(char, length);
237 for (int i = 0; i < length; i++) {
238 int val = parse_int("data");
239 result[i] = val;
240 }
241 return result;
242 }
244 // Parse a standard chunk of data emitted as:
245 // 'tag' <length> # # ...
246 // Where each # is an intptr_t item
247 intptr_t* parse_intptr_data(const char* tag, int& length) {
248 if (!parse_tag_and_count(tag, length)) {
249 return NULL;
250 }
252 intptr_t* result = NEW_RESOURCE_ARRAY(intptr_t, length);
253 for (int i = 0; i < length; i++) {
254 skip_ws();
255 intptr_t val = parse_intptr_t("data");
256 result[i] = val;
257 }
258 return result;
259 }
261 // Parse a possibly quoted version of a symbol into a symbolOop
262 Symbol* parse_symbol(TRAPS) {
263 const char* str = parse_escaped_string();
264 if (str != NULL) {
265 Symbol* sym = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);
266 return sym;
267 }
268 return NULL;
269 }
271 // Parse a valid klass name and look it up
272 Klass* parse_klass(TRAPS) {
273 const char* str = parse_escaped_string();
274 Symbol* klass_name = SymbolTable::lookup(str, (int)strlen(str), CHECK_NULL);
275 if (klass_name != NULL) {
276 Klass* k = SystemDictionary::resolve_or_fail(klass_name, loader, protection_domain, true, THREAD);
277 if (HAS_PENDING_EXCEPTION) {
278 oop throwable = PENDING_EXCEPTION;
279 java_lang_Throwable::print(throwable, tty);
280 tty->cr();
281 report_error(str);
282 return NULL;
283 }
284 return k;
285 }
286 return NULL;
287 }
289 // Lookup a klass
290 Klass* resolve_klass(const char* klass, TRAPS) {
291 Symbol* klass_name = SymbolTable::lookup(klass, (int)strlen(klass), CHECK_NULL);
292 return SystemDictionary::resolve_or_fail(klass_name, loader, protection_domain, true, CHECK_NULL);
293 }
295 // Parse the standard tuple of <klass> <name> <signature>
296 Method* parse_method(TRAPS) {
297 InstanceKlass* k = (InstanceKlass*)parse_klass(CHECK_NULL);
298 Symbol* method_name = parse_symbol(CHECK_NULL);
299 Symbol* method_signature = parse_symbol(CHECK_NULL);
300 Method* m = k->find_method(method_name, method_signature);
301 if (m == NULL) {
302 report_error("Can't find method");
303 }
304 return m;
305 }
307 // Process each line of the replay file executing each command until
308 // the file ends.
309 void process(TRAPS) {
310 line_no = 1;
311 int pos = 0;
312 int c = getc(stream);
313 while(c != EOF) {
314 if (pos + 1 >= buffer_length) {
315 int newl = buffer_length * 2;
316 char* newb = NEW_RESOURCE_ARRAY(char, newl);
317 memcpy(newb, buffer, pos);
318 buffer = newb;
319 buffer_length = newl;
320 }
321 if (c == '\n') {
322 // null terminate it, reset the pointer and process the line
323 buffer[pos] = '\0';
324 buffer_end = pos++;
325 bufptr = buffer;
326 process_command(CHECK);
327 if (had_error()) {
328 tty->print_cr("Error while parsing line %d: %s\n", line_no, _error_message);
329 tty->print_cr("%s", buffer);
330 return;
331 }
332 pos = 0;
333 buffer_end = 0;
334 line_no++;
335 } else if (c == '\r') {
336 // skip LF
337 } else {
338 buffer[pos++] = c;
339 }
340 c = getc(stream);
341 }
342 }
344 void process_command(TRAPS) {
345 char* cmd = parse_string();
346 if (cmd == NULL) {
347 return;
348 }
349 if (strcmp("#", cmd) == 0) {
350 // ignore
351 } else if (strcmp("compile", cmd) == 0) {
352 process_compile(CHECK);
353 } else if (strcmp("ciMethod", cmd) == 0) {
354 process_ciMethod(CHECK);
355 } else if (strcmp("ciMethodData", cmd) == 0) {
356 process_ciMethodData(CHECK);
357 } else if (strcmp("staticfield", cmd) == 0) {
358 process_staticfield(CHECK);
359 } else if (strcmp("ciInstanceKlass", cmd) == 0) {
360 process_ciInstanceKlass(CHECK);
361 } else if (strcmp("instanceKlass", cmd) == 0) {
362 process_instanceKlass(CHECK);
363 #if INCLUDE_JVMTI
364 } else if (strcmp("JvmtiExport", cmd) == 0) {
365 process_JvmtiExport(CHECK);
366 #endif // INCLUDE_JVMTI
367 } else {
368 report_error("unknown command");
369 }
370 }
372 // validation of comp_level
373 bool is_valid_comp_level(int comp_level) {
374 const int msg_len = 256;
375 char* msg = NULL;
376 if (!is_compile(comp_level)) {
377 msg = NEW_RESOURCE_ARRAY(char, msg_len);
378 jio_snprintf(msg, msg_len, "%d isn't compilation level", comp_level);
379 } else if (!TieredCompilation && (comp_level != CompLevel_highest_tier)) {
380 msg = NEW_RESOURCE_ARRAY(char, msg_len);
381 switch (comp_level) {
382 case CompLevel_simple:
383 jio_snprintf(msg, msg_len, "compilation level %d requires Client VM or TieredCompilation", comp_level);
384 break;
385 case CompLevel_full_optimization:
386 jio_snprintf(msg, msg_len, "compilation level %d requires Server VM", comp_level);
387 break;
388 default:
389 jio_snprintf(msg, msg_len, "compilation level %d requires TieredCompilation", comp_level);
390 }
391 }
392 if (msg != NULL) {
393 report_error(msg);
394 return false;
395 }
396 return true;
397 }
399 // compile <klass> <name> <signature> <entry_bci> <comp_level>
400 void process_compile(TRAPS) {
401 Method* method = parse_method(CHECK);
402 if (had_error()) return;
403 int entry_bci = parse_int("entry_bci");
404 const char* comp_level_label = "comp_level";
405 int comp_level = parse_int(comp_level_label);
406 // old version w/o comp_level
407 if (had_error() && (error_message() == comp_level_label)) {
408 comp_level = CompLevel_full_optimization;
409 }
410 if (!is_valid_comp_level(comp_level)) {
411 return;
412 }
413 Klass* k = method->method_holder();
414 ((InstanceKlass*)k)->initialize(THREAD);
415 if (HAS_PENDING_EXCEPTION) {
416 oop throwable = PENDING_EXCEPTION;
417 java_lang_Throwable::print(throwable, tty);
418 tty->cr();
419 if (ReplayIgnoreInitErrors) {
420 CLEAR_PENDING_EXCEPTION;
421 ((InstanceKlass*)k)->set_init_state(InstanceKlass::fully_initialized);
422 } else {
423 return;
424 }
425 }
426 // Make sure the existence of a prior compile doesn't stop this one
427 nmethod* nm = (entry_bci != InvocationEntryBci) ? method->lookup_osr_nmethod_for(entry_bci, comp_level, true) : method->code();
428 if (nm != NULL) {
429 nm->make_not_entrant();
430 }
431 replay_state = this;
432 CompileBroker::compile_method(method, entry_bci, comp_level,
433 methodHandle(), 0, "replay", THREAD);
434 replay_state = NULL;
435 reset();
436 }
438 // ciMethod <klass> <name> <signature> <invocation_counter> <backedge_counter> <interpreter_invocation_count> <interpreter_throwout_count> <instructions_size>
439 //
440 //
441 void process_ciMethod(TRAPS) {
442 Method* method = parse_method(CHECK);
443 if (had_error()) return;
444 ciMethodRecord* rec = new_ciMethod(method);
445 rec->invocation_counter = parse_int("invocation_counter");
446 rec->backedge_counter = parse_int("backedge_counter");
447 rec->interpreter_invocation_count = parse_int("interpreter_invocation_count");
448 rec->interpreter_throwout_count = parse_int("interpreter_throwout_count");
449 rec->instructions_size = parse_int("instructions_size");
450 }
452 // ciMethodData <klass> <name> <signature> <state> <current mileage> orig <length> # # ... data <length> # # ... oops <length>
453 void process_ciMethodData(TRAPS) {
454 Method* method = parse_method(CHECK);
455 if (had_error()) return;
456 /* jsut copied from Method, to build interpret data*/
457 if (InstanceRefKlass::owns_pending_list_lock((JavaThread*)THREAD)) {
458 return;
459 }
460 // methodOopDesc::build_interpreter_method_data(method, CHECK);
461 {
462 // Grab a lock here to prevent multiple
463 // MethodData*s from being created.
464 MutexLocker ml(MethodData_lock, THREAD);
465 if (method->method_data() == NULL) {
466 ClassLoaderData* loader_data = method->method_holder()->class_loader_data();
467 MethodData* method_data = MethodData::allocate(loader_data, method, CHECK);
468 method->set_method_data(method_data);
469 }
470 }
472 // collect and record all the needed information for later
473 ciMethodDataRecord* rec = new_ciMethodData(method);
474 rec->state = parse_int("state");
475 rec->current_mileage = parse_int("current_mileage");
477 rec->orig_data = parse_data("orig", rec->orig_data_length);
478 if (rec->orig_data == NULL) {
479 return;
480 }
481 rec->data = parse_intptr_data("data", rec->data_length);
482 if (rec->data == NULL) {
483 return;
484 }
485 if (!parse_tag_and_count("oops", rec->oops_length)) {
486 return;
487 }
488 rec->oops_handles = NEW_RESOURCE_ARRAY(jobject, rec->oops_length);
489 rec->oops_offsets = NEW_RESOURCE_ARRAY(int, rec->oops_length);
490 for (int i = 0; i < rec->oops_length; i++) {
491 int offset = parse_int("offset");
492 if (had_error()) {
493 return;
494 }
495 Klass* k = parse_klass(CHECK);
496 rec->oops_offsets[i] = offset;
497 KlassHandle *kh = NEW_C_HEAP_OBJ(KlassHandle, mtCompiler);
498 ::new ((void*)kh) KlassHandle(THREAD, k);
499 rec->oops_handles[i] = (jobject)kh;
500 }
501 }
503 // instanceKlass <name>
504 //
505 // Loads and initializes the klass 'name'. This can be used to
506 // create particular class loading environments
507 void process_instanceKlass(TRAPS) {
508 // just load the referenced class
509 Klass* k = parse_klass(CHECK);
510 }
512 // ciInstanceKlass <name> <is_linked> <is_initialized> <length> tag # # # ...
513 //
514 // Load the klass 'name' and link or initialize it. Verify that the
515 // constant pool is the same length as 'length' and make sure the
516 // constant pool tags are in the same state.
517 void process_ciInstanceKlass(TRAPS) {
518 InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
519 int is_linked = parse_int("is_linked");
520 int is_initialized = parse_int("is_initialized");
521 int length = parse_int("length");
522 if (is_initialized) {
523 k->initialize(THREAD);
524 if (HAS_PENDING_EXCEPTION) {
525 oop throwable = PENDING_EXCEPTION;
526 java_lang_Throwable::print(throwable, tty);
527 tty->cr();
528 if (ReplayIgnoreInitErrors) {
529 CLEAR_PENDING_EXCEPTION;
530 k->set_init_state(InstanceKlass::fully_initialized);
531 } else {
532 return;
533 }
534 }
535 } else if (is_linked) {
536 k->link_class(CHECK);
537 }
538 ConstantPool* cp = k->constants();
539 if (length != cp->length()) {
540 report_error("constant pool length mismatch: wrong class files?");
541 return;
542 }
544 int parsed_two_word = 0;
545 for (int i = 1; i < length; i++) {
546 int tag = parse_int("tag");
547 if (had_error()) {
548 return;
549 }
550 switch (cp->tag_at(i).value()) {
551 case JVM_CONSTANT_UnresolvedClass: {
552 if (tag == JVM_CONSTANT_Class) {
553 tty->print_cr("Resolving klass %s at %d", cp->unresolved_klass_at(i)->as_utf8(), i);
554 Klass* k = cp->klass_at(i, CHECK);
555 }
556 break;
557 }
558 case JVM_CONSTANT_Long:
559 case JVM_CONSTANT_Double:
560 parsed_two_word = i + 1;
562 case JVM_CONSTANT_ClassIndex:
563 case JVM_CONSTANT_StringIndex:
564 case JVM_CONSTANT_String:
565 case JVM_CONSTANT_UnresolvedClassInError:
566 case JVM_CONSTANT_Fieldref:
567 case JVM_CONSTANT_Methodref:
568 case JVM_CONSTANT_InterfaceMethodref:
569 case JVM_CONSTANT_NameAndType:
570 case JVM_CONSTANT_Utf8:
571 case JVM_CONSTANT_Integer:
572 case JVM_CONSTANT_Float:
573 if (tag != cp->tag_at(i).value()) {
574 report_error("tag mismatch: wrong class files?");
575 return;
576 }
577 break;
579 case JVM_CONSTANT_Class:
580 if (tag == JVM_CONSTANT_Class) {
581 } else if (tag == JVM_CONSTANT_UnresolvedClass) {
582 tty->print_cr("Warning: entry was unresolved in the replay data");
583 } else {
584 report_error("Unexpected tag");
585 return;
586 }
587 break;
589 case 0:
590 if (parsed_two_word == i) continue;
592 default:
593 fatal(err_msg_res("Unexpected tag: %d", cp->tag_at(i).value()));
594 break;
595 }
597 }
598 }
600 // Initialize a class and fill in the value for a static field.
601 // This is useful when the compile was dependent on the value of
602 // static fields but it's impossible to properly rerun the static
603 // initiailizer.
604 void process_staticfield(TRAPS) {
605 InstanceKlass* k = (InstanceKlass *)parse_klass(CHECK);
607 if (ReplaySuppressInitializers == 0 ||
608 ReplaySuppressInitializers == 2 && k->class_loader() == NULL) {
609 return;
610 }
612 assert(k->is_initialized(), "must be");
614 const char* field_name = parse_escaped_string();;
615 const char* field_signature = parse_string();
616 fieldDescriptor fd;
617 Symbol* name = SymbolTable::lookup(field_name, (int)strlen(field_name), CHECK);
618 Symbol* sig = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);
619 if (!k->find_local_field(name, sig, &fd) ||
620 !fd.is_static() ||
621 fd.has_initial_value()) {
622 report_error(field_name);
623 return;
624 }
626 oop java_mirror = k->java_mirror();
627 if (field_signature[0] == '[') {
628 int length = parse_int("array length");
629 oop value = NULL;
631 if (field_signature[1] == '[') {
632 // multi dimensional array
633 ArrayKlass* kelem = (ArrayKlass *)parse_klass(CHECK);
634 int rank = 0;
635 while (field_signature[rank] == '[') {
636 rank++;
637 }
638 int* dims = NEW_RESOURCE_ARRAY(int, rank);
639 dims[0] = length;
640 for (int i = 1; i < rank; i++) {
641 dims[i] = 1; // These aren't relevant to the compiler
642 }
643 value = kelem->multi_allocate(rank, dims, CHECK);
644 } else {
645 if (strcmp(field_signature, "[B") == 0) {
646 value = oopFactory::new_byteArray(length, CHECK);
647 } else if (strcmp(field_signature, "[Z") == 0) {
648 value = oopFactory::new_boolArray(length, CHECK);
649 } else if (strcmp(field_signature, "[C") == 0) {
650 value = oopFactory::new_charArray(length, CHECK);
651 } else if (strcmp(field_signature, "[S") == 0) {
652 value = oopFactory::new_shortArray(length, CHECK);
653 } else if (strcmp(field_signature, "[F") == 0) {
654 value = oopFactory::new_singleArray(length, CHECK);
655 } else if (strcmp(field_signature, "[D") == 0) {
656 value = oopFactory::new_doubleArray(length, CHECK);
657 } else if (strcmp(field_signature, "[I") == 0) {
658 value = oopFactory::new_intArray(length, CHECK);
659 } else if (strcmp(field_signature, "[J") == 0) {
660 value = oopFactory::new_longArray(length, CHECK);
661 } else if (field_signature[0] == '[' && field_signature[1] == 'L') {
662 KlassHandle kelem = resolve_klass(field_signature + 1, CHECK);
663 value = oopFactory::new_objArray(kelem(), length, CHECK);
664 } else {
665 report_error("unhandled array staticfield");
666 }
667 }
668 java_mirror->obj_field_put(fd.offset(), value);
669 } else {
670 const char* string_value = parse_escaped_string();
671 if (strcmp(field_signature, "I") == 0) {
672 int value = atoi(string_value);
673 java_mirror->int_field_put(fd.offset(), value);
674 } else if (strcmp(field_signature, "B") == 0) {
675 int value = atoi(string_value);
676 java_mirror->byte_field_put(fd.offset(), value);
677 } else if (strcmp(field_signature, "C") == 0) {
678 int value = atoi(string_value);
679 java_mirror->char_field_put(fd.offset(), value);
680 } else if (strcmp(field_signature, "S") == 0) {
681 int value = atoi(string_value);
682 java_mirror->short_field_put(fd.offset(), value);
683 } else if (strcmp(field_signature, "Z") == 0) {
684 int value = atol(string_value);
685 java_mirror->bool_field_put(fd.offset(), value);
686 } else if (strcmp(field_signature, "J") == 0) {
687 jlong value;
688 if (sscanf(string_value, JLONG_FORMAT, &value) != 1) {
689 fprintf(stderr, "Error parsing long: %s\n", string_value);
690 return;
691 }
692 java_mirror->long_field_put(fd.offset(), value);
693 } else if (strcmp(field_signature, "F") == 0) {
694 float value = atof(string_value);
695 java_mirror->float_field_put(fd.offset(), value);
696 } else if (strcmp(field_signature, "D") == 0) {
697 double value = atof(string_value);
698 java_mirror->double_field_put(fd.offset(), value);
699 } else if (strcmp(field_signature, "Ljava/lang/String;") == 0) {
700 Handle value = java_lang_String::create_from_str(string_value, CHECK);
701 java_mirror->obj_field_put(fd.offset(), value());
702 } else if (field_signature[0] == 'L') {
703 Symbol* klass_name = SymbolTable::lookup(field_signature, (int)strlen(field_signature), CHECK);
704 KlassHandle kelem = resolve_klass(field_signature, CHECK);
705 oop value = ((InstanceKlass*)kelem())->allocate_instance(CHECK);
706 java_mirror->obj_field_put(fd.offset(), value);
707 } else {
708 report_error("unhandled staticfield");
709 }
710 }
711 }
713 #if INCLUDE_JVMTI
714 void process_JvmtiExport(TRAPS) {
715 const char* field = parse_string();
716 bool value = parse_int("JvmtiExport flag") != 0;
717 if (strcmp(field, "can_access_local_variables") == 0) {
718 JvmtiExport::set_can_access_local_variables(value);
719 } else if (strcmp(field, "can_hotswap_or_post_breakpoint") == 0) {
720 JvmtiExport::set_can_hotswap_or_post_breakpoint(value);
721 } else if (strcmp(field, "can_post_on_exceptions") == 0) {
722 JvmtiExport::set_can_post_on_exceptions(value);
723 } else {
724 report_error("Unrecognized JvmtiExport directive");
725 }
726 }
727 #endif // INCLUDE_JVMTI
729 // Create and initialize a record for a ciMethod
730 ciMethodRecord* new_ciMethod(Method* method) {
731 ciMethodRecord* rec = NEW_RESOURCE_OBJ(ciMethodRecord);
732 rec->klass = method->method_holder()->name()->as_utf8();
733 rec->method = method->name()->as_utf8();
734 rec->signature = method->signature()->as_utf8();
735 ci_method_records.append(rec);
736 return rec;
737 }
739 // Lookup data for a ciMethod
740 ciMethodRecord* find_ciMethodRecord(Method* method) {
741 const char* klass_name = method->method_holder()->name()->as_utf8();
742 const char* method_name = method->name()->as_utf8();
743 const char* signature = method->signature()->as_utf8();
744 for (int i = 0; i < ci_method_records.length(); i++) {
745 ciMethodRecord* rec = ci_method_records.at(i);
746 if (strcmp(rec->klass, klass_name) == 0 &&
747 strcmp(rec->method, method_name) == 0 &&
748 strcmp(rec->signature, signature) == 0) {
749 return rec;
750 }
751 }
752 return NULL;
753 }
755 // Create and initialize a record for a ciMethodData
756 ciMethodDataRecord* new_ciMethodData(Method* method) {
757 ciMethodDataRecord* rec = NEW_RESOURCE_OBJ(ciMethodDataRecord);
758 rec->klass = method->method_holder()->name()->as_utf8();
759 rec->method = method->name()->as_utf8();
760 rec->signature = method->signature()->as_utf8();
761 ci_method_data_records.append(rec);
762 return rec;
763 }
765 // Lookup data for a ciMethodData
766 ciMethodDataRecord* find_ciMethodDataRecord(Method* method) {
767 const char* klass_name = method->method_holder()->name()->as_utf8();
768 const char* method_name = method->name()->as_utf8();
769 const char* signature = method->signature()->as_utf8();
770 for (int i = 0; i < ci_method_data_records.length(); i++) {
771 ciMethodDataRecord* rec = ci_method_data_records.at(i);
772 if (strcmp(rec->klass, klass_name) == 0 &&
773 strcmp(rec->method, method_name) == 0 &&
774 strcmp(rec->signature, signature) == 0) {
775 return rec;
776 }
777 }
778 return NULL;
779 }
781 const char* error_message() {
782 return _error_message;
783 }
785 void reset() {
786 _error_message = NULL;
787 ci_method_records.clear();
788 ci_method_data_records.clear();
789 }
791 // Take an ascii string contain \u#### escapes and convert it to utf8
792 // in place.
793 static void unescape_string(char* value) {
794 char* from = value;
795 char* to = value;
796 while (*from != '\0') {
797 if (*from != '\\') {
798 *from++ = *to++;
799 } else {
800 switch (from[1]) {
801 case 'u': {
802 from += 2;
803 jchar value=0;
804 for (int i=0; i<4; i++) {
805 char c = *from++;
806 switch (c) {
807 case '0': case '1': case '2': case '3': case '4':
808 case '5': case '6': case '7': case '8': case '9':
809 value = (value << 4) + c - '0';
810 break;
811 case 'a': case 'b': case 'c':
812 case 'd': case 'e': case 'f':
813 value = (value << 4) + 10 + c - 'a';
814 break;
815 case 'A': case 'B': case 'C':
816 case 'D': case 'E': case 'F':
817 value = (value << 4) + 10 + c - 'A';
818 break;
819 default:
820 ShouldNotReachHere();
821 }
822 }
823 UNICODE::convert_to_utf8(&value, 1, to);
824 to++;
825 break;
826 }
827 case 't': *to++ = '\t'; from += 2; break;
828 case 'n': *to++ = '\n'; from += 2; break;
829 case 'r': *to++ = '\r'; from += 2; break;
830 case 'f': *to++ = '\f'; from += 2; break;
831 default:
832 ShouldNotReachHere();
833 }
834 }
835 }
836 *from = *to;
837 }
838 };
840 void ciReplay::replay(TRAPS) {
841 int exit_code = replay_impl(THREAD);
843 Threads::destroy_vm();
845 vm_exit(exit_code);
846 }
848 int ciReplay::replay_impl(TRAPS) {
849 HandleMark hm;
850 ResourceMark rm;
851 // Make sure we don't run with background compilation
852 BackgroundCompilation = false;
854 if (ReplaySuppressInitializers > 2) {
855 // ReplaySuppressInitializers > 2 means that we want to allow
856 // normal VM bootstrap but once we get into the replay itself
857 // don't allow any intializers to be run.
858 ReplaySuppressInitializers = 1;
859 }
861 if (FLAG_IS_DEFAULT(ReplayDataFile)) {
862 tty->print_cr("ERROR: no compiler replay data file specified (use -XX:ReplayDataFile=replay_pid12345.txt).");
863 return 1;
864 }
866 // Load and parse the replay data
867 CompileReplay rp(ReplayDataFile, THREAD);
868 int exit_code = 0;
869 if (rp.can_replay()) {
870 rp.process(THREAD);
871 } else {
872 exit_code = 1;
873 return exit_code;
874 }
876 if (HAS_PENDING_EXCEPTION) {
877 oop throwable = PENDING_EXCEPTION;
878 CLEAR_PENDING_EXCEPTION;
879 java_lang_Throwable::print(throwable, tty);
880 tty->cr();
881 java_lang_Throwable::print_stack_trace(throwable, tty);
882 tty->cr();
883 exit_code = 2;
884 }
886 if (rp.had_error()) {
887 tty->print_cr("Failed on %s", rp.error_message());
888 exit_code = 1;
889 }
890 return exit_code;
891 }
894 void ciReplay::initialize(ciMethodData* m) {
895 if (replay_state == NULL) {
896 return;
897 }
899 ASSERT_IN_VM;
900 ResourceMark rm;
902 Method* method = m->get_MethodData()->method();
903 ciMethodDataRecord* rec = replay_state->find_ciMethodDataRecord(method);
904 if (rec == NULL) {
905 // This indicates some mismatch with the original environment and
906 // the replay environment though it's not always enough to
907 // interfere with reproducing a bug
908 tty->print_cr("Warning: requesting ciMethodData record for method with no data: ");
909 method->print_name(tty);
910 tty->cr();
911 } else {
912 m->_state = rec->state;
913 m->_current_mileage = rec->current_mileage;
914 if (rec->data_length != 0) {
915 assert(m->_data_size == rec->data_length * (int)sizeof(rec->data[0]), "must agree");
917 // Write the correct ciObjects back into the profile data
918 ciEnv* env = ciEnv::current();
919 for (int i = 0; i < rec->oops_length; i++) {
920 KlassHandle *h = (KlassHandle *)rec->oops_handles[i];
921 *(ciMetadata**)(rec->data + rec->oops_offsets[i]) =
922 env->get_metadata((*h)());
923 }
924 // Copy the updated profile data into place as intptr_ts
925 #ifdef _LP64
926 Copy::conjoint_jlongs_atomic((jlong *)rec->data, (jlong *)m->_data, rec->data_length);
927 #else
928 Copy::conjoint_jints_atomic((jint *)rec->data, (jint *)m->_data, rec->data_length);
929 #endif
930 }
932 // copy in the original header
933 Copy::conjoint_jbytes(rec->orig_data, (char*)&m->_orig, rec->orig_data_length);
934 }
935 }
938 bool ciReplay::should_not_inline(ciMethod* method) {
939 if (replay_state == NULL) {
940 return false;
941 }
943 VM_ENTRY_MARK;
944 // ciMethod without a record shouldn't be inlined.
945 return replay_state->find_ciMethodRecord(method->get_Method()) == NULL;
946 }
949 void ciReplay::initialize(ciMethod* m) {
950 if (replay_state == NULL) {
951 return;
952 }
954 ASSERT_IN_VM;
955 ResourceMark rm;
957 Method* method = m->get_Method();
958 ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
959 if (rec == NULL) {
960 // This indicates some mismatch with the original environment and
961 // the replay environment though it's not always enough to
962 // interfere with reproducing a bug
963 tty->print_cr("Warning: requesting ciMethod record for method with no data: ");
964 method->print_name(tty);
965 tty->cr();
966 } else {
967 EXCEPTION_CONTEXT;
968 // m->_instructions_size = rec->instructions_size;
969 m->_instructions_size = -1;
970 m->_interpreter_invocation_count = rec->interpreter_invocation_count;
971 m->_interpreter_throwout_count = rec->interpreter_throwout_count;
972 MethodCounters* mcs = method->get_method_counters(CHECK_AND_CLEAR);
973 guarantee(mcs != NULL, "method counters allocation failed");
974 mcs->invocation_counter()->_counter = rec->invocation_counter;
975 mcs->backedge_counter()->_counter = rec->backedge_counter;
976 }
977 }
979 bool ciReplay::is_loaded(Method* method) {
980 if (replay_state == NULL) {
981 return true;
982 }
984 ASSERT_IN_VM;
985 ResourceMark rm;
987 ciMethodRecord* rec = replay_state->find_ciMethodRecord(method);
988 return rec != NULL;
989 }
990 #endif // PRODUCT