1 /*
2 * Copyright (c) 1998, 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 #include "precompiled.hpp"
26 #include "compiler/compilerOracle.hpp"
27 #include "memory/allocation.inline.hpp"
28 #include "memory/oopFactory.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "oops/klass.hpp"
31 #include "oops/method.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "oops/symbol.hpp"
34 #include "runtime/handles.inline.hpp"
35 #include "runtime/jniHandles.hpp"
36
37 class MethodMatcher : public CHeapObj<mtCompiler> {
38 public:
39 enum Mode {
40 Exact,
41 Prefix = 1,
42 Suffix = 2,
43 Substring = Prefix | Suffix,
44 Any,
45 Unknown = -1
46 };
47
48 protected:
49 Symbol* _class_name;
50 Symbol* _method_name;
51 Symbol* _signature;
52 Mode _class_mode;
53 Mode _method_mode;
54 MethodMatcher* _next;
55
56 static bool match(Symbol* candidate, Symbol* match, Mode match_mode);
57
58 Symbol* class_name() const { return _class_name; }
59 Symbol* method_name() const { return _method_name; }
60 Symbol* signature() const { return _signature; }
61
62 public:
63 MethodMatcher(Symbol* class_name, Mode class_mode,
64 Symbol* method_name, Mode method_mode,
65 Symbol* signature, MethodMatcher* next);
66 MethodMatcher(Symbol* class_name, Symbol* method_name, MethodMatcher* next);
67
68 // utility method
69 MethodMatcher* find(methodHandle method) {
70 Symbol* class_name = method->method_holder()->name();
71 Symbol* method_name = method->name();
72 for (MethodMatcher* current = this; current != NULL; current = current->_next) {
73 if (match(class_name, current->class_name(), current->_class_mode) &&
74 match(method_name, current->method_name(), current->_method_mode) &&
75 (current->signature() == NULL || current->signature() == method->signature())) {
76 return current;
77 }
78 }
79 return NULL;
80 }
81
82 bool match(methodHandle method) {
83 return find(method) != NULL;
84 }
85
86 MethodMatcher* next() const { return _next; }
87
88 static void print_symbol(Symbol* h, Mode mode) {
89 ResourceMark rm;
90
91 if (mode == Suffix || mode == Substring || mode == Any) {
92 tty->print("*");
93 }
94 if (mode != Any) {
95 h->print_symbol_on(tty);
96 }
97 if (mode == Prefix || mode == Substring) {
98 tty->print("*");
99 }
100 }
101
102 void print_base() {
103 print_symbol(class_name(), _class_mode);
104 tty->print(".");
105 print_symbol(method_name(), _method_mode);
106 if (signature() != NULL) {
107 tty->print(" ");
108 signature()->print_symbol_on(tty);
109 }
110 }
111
112 virtual void print() {
113 print_base();
114 tty->cr();
115 }
116 };
117
118 MethodMatcher::MethodMatcher(Symbol* class_name, Symbol* method_name, MethodMatcher* next) {
119 _class_name = class_name;
120 _method_name = method_name;
121 _next = next;
122 _class_mode = MethodMatcher::Exact;
123 _method_mode = MethodMatcher::Exact;
124 _signature = NULL;
125 }
126
127
128 MethodMatcher::MethodMatcher(Symbol* class_name, Mode class_mode,
129 Symbol* method_name, Mode method_mode,
130 Symbol* signature, MethodMatcher* next):
131 _class_mode(class_mode)
132 , _method_mode(method_mode)
133 , _next(next)
134 , _class_name(class_name)
135 , _method_name(method_name)
136 , _signature(signature) {
137 }
138
139 bool MethodMatcher::match(Symbol* candidate, Symbol* match, Mode match_mode) {
140 if (match_mode == Any) {
141 return true;
142 }
143
144 if (match_mode == Exact) {
145 return candidate == match;
146 }
147
148 ResourceMark rm;
149 const char * candidate_string = candidate->as_C_string();
150 const char * match_string = match->as_C_string();
151
152 switch (match_mode) {
153 case Prefix:
154 return strstr(candidate_string, match_string) == candidate_string;
155
156 case Suffix: {
157 size_t clen = strlen(candidate_string);
158 size_t mlen = strlen(match_string);
159 return clen >= mlen && strcmp(candidate_string + clen - mlen, match_string) == 0;
160 }
161
162 case Substring:
163 return strstr(candidate_string, match_string) != NULL;
164
165 default:
166 return false;
167 }
168 }
169
170
171 class MethodOptionMatcher: public MethodMatcher {
172 const char * option;
173 public:
174 MethodOptionMatcher(Symbol* class_name, Mode class_mode,
175 Symbol* method_name, Mode method_mode,
176 Symbol* signature, const char * opt, MethodMatcher* next):
177 MethodMatcher(class_name, class_mode, method_name, method_mode, signature, next) {
178 option = opt;
179 }
180
181 bool match(methodHandle method, const char* opt) {
182 MethodOptionMatcher* current = this;
183 while (current != NULL) {
184 current = (MethodOptionMatcher*)current->find(method);
185 if (current == NULL) {
186 return false;
187 }
188 if (strcmp(current->option, opt) == 0) {
189 return true;
190 }
191 current = current->next();
192 }
193 return false;
194 }
195
196 MethodOptionMatcher* next() {
197 return (MethodOptionMatcher*)_next;
198 }
199
200 virtual void print() {
201 print_base();
202 tty->print(" %s", option);
203 tty->cr();
204 }
205 };
206
207
208
209 // this must parallel the command_names below
210 enum OracleCommand {
211 UnknownCommand = -1,
212 OracleFirstCommand = 0,
213 BreakCommand = OracleFirstCommand,
214 PrintCommand,
215 ExcludeCommand,
216 InlineCommand,
217 DontInlineCommand,
218 CompileOnlyCommand,
219 LogCommand,
220 OptionCommand,
221 QuietCommand,
222 HelpCommand,
223 OracleCommandCount
224 };
225
226 // this must parallel the enum OracleCommand
227 static const char * command_names[] = {
228 "break",
229 "print",
230 "exclude",
231 "inline",
232 "dontinline",
233 "compileonly",
234 "log",
235 "option",
236 "quiet",
237 "help"
238 };
239
240 class MethodMatcher;
241 static MethodMatcher* lists[OracleCommandCount] = { 0, };
242
243
244 static bool check_predicate(OracleCommand command, methodHandle method) {
245 return ((lists[command] != NULL) &&
246 !method.is_null() &&
247 lists[command]->match(method));
248 }
249
250
251 static MethodMatcher* add_predicate(OracleCommand command,
252 Symbol* class_name, MethodMatcher::Mode c_mode,
253 Symbol* method_name, MethodMatcher::Mode m_mode,
254 Symbol* signature) {
255 assert(command != OptionCommand, "must use add_option_string");
256 if (command == LogCommand && !LogCompilation && lists[LogCommand] == NULL)
257 tty->print_cr("Warning: +LogCompilation must be enabled in order for individual methods to be logged.");
258 lists[command] = new MethodMatcher(class_name, c_mode, method_name, m_mode, signature, lists[command]);
259 return lists[command];
260 }
261
262
263
264 static MethodMatcher* add_option_string(Symbol* class_name, MethodMatcher::Mode c_mode,
265 Symbol* method_name, MethodMatcher::Mode m_mode,
266 Symbol* signature,
267 const char* option) {
268 lists[OptionCommand] = new MethodOptionMatcher(class_name, c_mode, method_name, m_mode,
269 signature, option, lists[OptionCommand]);
270 return lists[OptionCommand];
271 }
272
273
274 bool CompilerOracle::has_option_string(methodHandle method, const char* option) {
275 return lists[OptionCommand] != NULL &&
276 ((MethodOptionMatcher*)lists[OptionCommand])->match(method, option);
277 }
278
279
280 bool CompilerOracle::should_exclude(methodHandle method, bool& quietly) {
281 quietly = true;
282 if (lists[ExcludeCommand] != NULL) {
283 if (lists[ExcludeCommand]->match(method)) {
284 quietly = _quiet;
285 return true;
286 }
287 }
288
289 if (lists[CompileOnlyCommand] != NULL) {
290 return !lists[CompileOnlyCommand]->match(method);
291 }
292 return false;
293 }
294
295
296 bool CompilerOracle::should_inline(methodHandle method) {
297 return (check_predicate(InlineCommand, method));
298 }
299
300
301 bool CompilerOracle::should_not_inline(methodHandle method) {
302 return (check_predicate(DontInlineCommand, method));
303 }
304
305
306 bool CompilerOracle::should_print(methodHandle method) {
307 return (check_predicate(PrintCommand, method));
308 }
309
310
311 bool CompilerOracle::should_log(methodHandle method) {
312 if (!LogCompilation) return false;
313 if (lists[LogCommand] == NULL) return true; // by default, log all
314 return (check_predicate(LogCommand, method));
315 }
316
317
318 bool CompilerOracle::should_break_at(methodHandle method) {
319 return check_predicate(BreakCommand, method);
320 }
321
322
323 static OracleCommand parse_command_name(const char * line, int* bytes_read) {
324 assert(ARRAY_SIZE(command_names) == OracleCommandCount,
325 "command_names size mismatch");
326
327 *bytes_read = 0;
328 char command[33];
329 int result = sscanf(line, "%32[a-z]%n", command, bytes_read);
330 for (uint i = 0; i < ARRAY_SIZE(command_names); i++) {
331 if (strcmp(command, command_names[i]) == 0) {
332 return (OracleCommand)i;
333 }
334 }
335 return UnknownCommand;
336 }
337
338
339 static void usage() {
340 tty->print_cr(" CompileCommand and the CompilerOracle allows simple control over");
341 tty->print_cr(" what's allowed to be compiled. The standard supported directives");
342 tty->print_cr(" are exclude and compileonly. The exclude directive stops a method");
343 tty->print_cr(" from being compiled and compileonly excludes all methods except for");
344 tty->print_cr(" the ones mentioned by compileonly directives. The basic form of");
345 tty->print_cr(" all commands is a command name followed by the name of the method");
346 tty->print_cr(" in one of two forms: the standard class file format as in");
347 tty->print_cr(" class/name.methodName or the PrintCompilation format");
348 tty->print_cr(" class.name::methodName. The method name can optionally be followed");
349 tty->print_cr(" by a space then the signature of the method in the class file");
350 tty->print_cr(" format. Otherwise the directive applies to all methods with the");
351 tty->print_cr(" same name and class regardless of signature. Leading and trailing");
352 tty->print_cr(" *'s in the class and/or method name allows a small amount of");
353 tty->print_cr(" wildcarding. ");
354 tty->cr();
355 tty->print_cr(" Examples:");
356 tty->cr();
357 tty->print_cr(" exclude java/lang/StringBuffer.append");
358 tty->print_cr(" compileonly java/lang/StringBuffer.toString ()Ljava/lang/String;");
359 tty->print_cr(" exclude java/lang/String*.*");
360 tty->print_cr(" exclude *.toString");
361 }
362
363
364 // The characters allowed in a class or method name. All characters > 0x7f
365 // are allowed in order to handle obfuscated class files (e.g. Volano)
366 #define RANGEBASE "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789$_<>" \
367 "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f" \
368 "\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f" \
369 "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf" \
370 "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf" \
371 "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf" \
372 "\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf" \
373 "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef" \
374 "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
375
376 #define RANGE0 "[*" RANGEBASE "]"
377 #define RANGEDOT "[*" RANGEBASE ".]"
378 #define RANGESLASH "[*" RANGEBASE "/]"
379
380
381 // Accept several syntaxes for these patterns
382 // original syntax
383 // cmd java.lang.String foo
384 // PrintCompilation syntax
385 // cmd java.lang.String::foo
386 // VM syntax
387 // cmd java/lang/String[. ]foo
388 //
389
390 static const char* patterns[] = {
391 "%*[ \t]%255" RANGEDOT " " "%255" RANGE0 "%n",
392 "%*[ \t]%255" RANGEDOT "::" "%255" RANGE0 "%n",
393 "%*[ \t]%255" RANGESLASH "%*[ .]" "%255" RANGE0 "%n",
394 };
395
396 static MethodMatcher::Mode check_mode(char name[], const char*& error_msg) {
397 int match = MethodMatcher::Exact;
398 while (name[0] == '*') {
399 match |= MethodMatcher::Suffix;
400 strcpy(name, name + 1);
401 }
402
403 if (strcmp(name, "*") == 0) return MethodMatcher::Any;
404
405 size_t len = strlen(name);
406 while (len > 0 && name[len - 1] == '*') {
407 match |= MethodMatcher::Prefix;
408 name[--len] = '\0';
409 }
410
411 if (strstr(name, "*") != NULL) {
412 error_msg = " Embedded * not allowed";
413 return MethodMatcher::Unknown;
414 }
415 return (MethodMatcher::Mode)match;
416 }
417
418 static bool scan_line(const char * line,
419 char class_name[], MethodMatcher::Mode* c_mode,
420 char method_name[], MethodMatcher::Mode* m_mode,
421 int* bytes_read, const char*& error_msg) {
422 *bytes_read = 0;
423 error_msg = NULL;
424 for (uint i = 0; i < ARRAY_SIZE(patterns); i++) {
425 if (2 == sscanf(line, patterns[i], class_name, method_name, bytes_read)) {
426 *c_mode = check_mode(class_name, error_msg);
427 *m_mode = check_mode(method_name, error_msg);
428 return *c_mode != MethodMatcher::Unknown && *m_mode != MethodMatcher::Unknown;
429 }
430 }
431 return false;
432 }
433
434
435
436 void CompilerOracle::parse_from_line(char* line) {
437 if (line[0] == '\0') return;
438 if (line[0] == '#') return;
439
440 bool have_colon = (strstr(line, "::") != NULL);
441 for (char* lp = line; *lp != '\0'; lp++) {
442 // Allow '.' to separate the class name from the method name.
443 // This is the preferred spelling of methods:
444 // exclude java/lang/String.indexOf(I)I
445 // Allow ',' for spaces (eases command line quoting).
446 // exclude,java/lang/String.indexOf
447 // For backward compatibility, allow space as separator also.
448 // exclude java/lang/String indexOf
449 // exclude,java/lang/String,indexOf
450 // For easy cut-and-paste of method names, allow VM output format
451 // as produced by Method::print_short_name:
452 // exclude java.lang.String::indexOf
453 // For simple implementation convenience here, convert them all to space.
454 if (have_colon) {
455 if (*lp == '.') *lp = '/'; // dots build the package prefix
456 if (*lp == ':') *lp = ' ';
457 }
458 if (*lp == ',' || *lp == '.') *lp = ' ';
459 }
460
461 char* original_line = line;
462 int bytes_read;
463 OracleCommand command = parse_command_name(line, &bytes_read);
464 line += bytes_read;
465
466 if (command == UnknownCommand) {
467 tty->print_cr("CompilerOracle: unrecognized line");
468 tty->print_cr(" \"%s\"", original_line);
469 return;
470 }
471
472 if (command == QuietCommand) {
473 _quiet = true;
474 return;
475 }
476
477 if (command == HelpCommand) {
478 usage();
479 return;
480 }
481
482 MethodMatcher::Mode c_match = MethodMatcher::Exact;
483 MethodMatcher::Mode m_match = MethodMatcher::Exact;
484 char class_name[256];
485 char method_name[256];
486 char sig[1024];
487 char errorbuf[1024];
488 const char* error_msg = NULL;
489 MethodMatcher* match = NULL;
490
491 if (scan_line(line, class_name, &c_match, method_name, &m_match, &bytes_read, error_msg)) {
492 EXCEPTION_MARK;
493 Symbol* c_name = SymbolTable::new_symbol(class_name, CHECK);
494 Symbol* m_name = SymbolTable::new_symbol(method_name, CHECK);
495 Symbol* signature = NULL;
496
497 line += bytes_read;
498 // there might be a signature following the method.
499 // signatures always begin with ( so match that by hand
500 if (1 == sscanf(line, "%*[ \t](%254[[);/" RANGEBASE "]%n", sig + 1, &bytes_read)) {
501 sig[0] = '(';
502 line += bytes_read;
503 signature = SymbolTable::new_symbol(sig, CHECK);
504 }
505
506 if (command == OptionCommand) {
507 // Look for trailing options to support
508 // ciMethod::has_option("string") to control features in the
509 // compiler. Multiple options may follow the method name.
510 char option[256];
511 while (sscanf(line, "%*[ \t]%255[a-zA-Z0-9]%n", option, &bytes_read) == 1) {
512 if (match != NULL && !_quiet) {
513 // Print out the last match added
514 tty->print("CompilerOracle: %s ", command_names[command]);
515 match->print();
516 }
517 match = add_option_string(c_name, c_match, m_name, m_match, signature, strdup(option));
518 line += bytes_read;
519 }
520 } else {
521 bytes_read = 0;
522 sscanf(line, "%*[ \t]%n", &bytes_read);
523 if (line[bytes_read] != '\0') {
524 jio_snprintf(errorbuf, sizeof(errorbuf), " Unrecognized text after command: %s", line);
525 error_msg = errorbuf;
526 } else {
527 match = add_predicate(command, c_name, c_match, m_name, m_match, signature);
528 }
529 }
530 }
531
532 if (match != NULL) {
533 if (!_quiet) {
534 ResourceMark rm;
535 tty->print("CompilerOracle: %s ", command_names[command]);
536 match->print();
537 }
538 } else {
539 tty->print_cr("CompilerOracle: unrecognized line");
540 tty->print_cr(" \"%s\"", original_line);
541 if (error_msg != NULL) {
542 tty->print_cr(error_msg);
543 }
544 }
545 }
546
547 static const char* default_cc_file = ".hotspot_compiler";
548
549 static const char* cc_file() {
550 #ifdef ASSERT
551 if (CompileCommandFile == NULL)
552 return default_cc_file;
553 #endif
554 return CompileCommandFile;
555 }
556
557 bool CompilerOracle::has_command_file() {
558 return cc_file() != NULL;
559 }
560
561 bool CompilerOracle::_quiet = false;
562
563 void CompilerOracle::parse_from_file() {
564 assert(has_command_file(), "command file must be specified");
565 FILE* stream = fopen(cc_file(), "rt");
566 if (stream == NULL) return;
567
568 char token[1024];
569 int pos = 0;
570 int c = getc(stream);
571 while(c != EOF && pos < (int)(sizeof(token)-1)) {
572 if (c == '\n') {
573 token[pos++] = '\0';
574 parse_from_line(token);
575 pos = 0;
576 } else {
577 token[pos++] = c;
578 }
579 c = getc(stream);
580 }
581 token[pos++] = '\0';
582 parse_from_line(token);
583
584 fclose(stream);
585 }
586
587 void CompilerOracle::parse_from_string(const char* str, void (*parse_line)(char*)) {
588 char token[1024];
589 int pos = 0;
590 const char* sp = str;
591 int c = *sp++;
592 while (c != '\0' && pos < (int)(sizeof(token)-1)) {
593 if (c == '\n') {
594 token[pos++] = '\0';
595 parse_line(token);
596 pos = 0;
597 } else {
598 token[pos++] = c;
599 }
600 c = *sp++;
601 }
602 token[pos++] = '\0';
603 parse_line(token);
604 }
605
606 void CompilerOracle::append_comment_to_file(const char* message) {
607 assert(has_command_file(), "command file must be specified");
608 fileStream stream(fopen(cc_file(), "at"));
609 stream.print("# ");
610 for (int index = 0; message[index] != '\0'; index++) {
611 stream.put(message[index]);
612 if (message[index] == '\n') stream.print("# ");
613 }
614 stream.cr();
615 }
616
617 void CompilerOracle::append_exclude_to_file(methodHandle method) {
618 assert(has_command_file(), "command file must be specified");
619 fileStream stream(fopen(cc_file(), "at"));
620 stream.print("exclude ");
621 method->method_holder()->name()->print_symbol_on(&stream);
622 stream.print(".");
623 method->name()->print_symbol_on(&stream);
624 method->signature()->print_symbol_on(&stream);
625 stream.cr();
626 stream.cr();
627 }
628
629
630 void compilerOracle_init() {
631 CompilerOracle::parse_from_string(CompileCommand, CompilerOracle::parse_from_line);
632 CompilerOracle::parse_from_string(CompileOnly, CompilerOracle::parse_compile_only);
633 if (CompilerOracle::has_command_file()) {
634 CompilerOracle::parse_from_file();
635 } else {
636 struct stat buf;
637 if (os::stat(default_cc_file, &buf) == 0) {
638 warning("%s file is present but has been ignored. "
639 "Run with -XX:CompileCommandFile=%s to load the file.",
640 default_cc_file, default_cc_file);
641 }
642 }
643 if (lists[PrintCommand] != NULL) {
644 if (PrintAssembly) {
645 warning("CompileCommand and/or %s file contains 'print' commands, but PrintAssembly is also enabled", default_cc_file);
646 } else if (FLAG_IS_DEFAULT(DebugNonSafepoints)) {
647 warning("printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output");
648 DebugNonSafepoints = true;
649 }
650 }
651 }
652
653
654 void CompilerOracle::parse_compile_only(char * line) {
655 int i;
656 char name[1024];
657 const char* className = NULL;
658 const char* methodName = NULL;
659
660 bool have_colon = (strstr(line, "::") != NULL);
661 char method_sep = have_colon ? ':' : '.';
662
663 if (Verbose) {
664 tty->print_cr(line);
665 }
666
667 ResourceMark rm;
668 while (*line != '\0') {
669 MethodMatcher::Mode c_match = MethodMatcher::Exact;
670 MethodMatcher::Mode m_match = MethodMatcher::Exact;
671
672 for (i = 0;
673 i < 1024 && *line != '\0' && *line != method_sep && *line != ',' && !isspace(*line);
674 line++, i++) {
675 name[i] = *line;
676 if (name[i] == '.') name[i] = '/'; // package prefix uses '/'
677 }
678
679 if (i > 0) {
680 char* newName = NEW_RESOURCE_ARRAY( char, i + 1);
681 if (newName == NULL)
682 return;
683 strncpy(newName, name, i);
684 newName[i] = '\0';
685
686 if (className == NULL) {
687 className = newName;
688 c_match = MethodMatcher::Prefix;
689 } else {
690 methodName = newName;
691 }
692 }
693
694 if (*line == method_sep) {
695 if (className == NULL) {
696 className = "";
697 c_match = MethodMatcher::Any;
698 } else {
699 // foo/bar.blah is an exact match on foo/bar, bar.blah is a suffix match on bar
700 if (strchr(className, '/') != NULL) {
701 c_match = MethodMatcher::Exact;
702 } else {
703 c_match = MethodMatcher::Suffix;
704 }
705 }
706 } else {
707 // got foo or foo/bar
708 if (className == NULL) {
709 ShouldNotReachHere();
710 } else {
711 // got foo or foo/bar
712 if (strchr(className, '/') != NULL) {
713 c_match = MethodMatcher::Prefix;
714 } else if (className[0] == '\0') {
715 c_match = MethodMatcher::Any;
716 } else {
717 c_match = MethodMatcher::Substring;
718 }
719 }
720 }
721
722 // each directive is terminated by , or NUL or . followed by NUL
723 if (*line == ',' || *line == '\0' || (line[0] == '.' && line[1] == '\0')) {
724 if (methodName == NULL) {
725 methodName = "";
726 if (*line != method_sep) {
727 m_match = MethodMatcher::Any;
728 }
729 }
730
731 EXCEPTION_MARK;
732 Symbol* c_name = SymbolTable::new_symbol(className, CHECK);
733 Symbol* m_name = SymbolTable::new_symbol(methodName, CHECK);
734 Symbol* signature = NULL;
735
736 add_predicate(CompileOnlyCommand, c_name, c_match, m_name, m_match, signature);
737 if (PrintVMOptions) {
738 tty->print("CompileOnly: compileonly ");
739 lists[CompileOnlyCommand]->print();
740 }
741
742 className = NULL;
743 methodName = NULL;
744 }
745
746 line = *line == '\0' ? line : line + 1;
747 }
748 }