Wed, 13 Mar 2013 15:15:56 -0400
8009829: CDS: JDK JPRT test fails crash in Symbol::equals()
Summary: -Xshare:dump was creating a Symbol in C_heap. There's an assert there that jdk jprt wasn't hitting because it was only done in product
Reviewed-by: dholmes, hseigel, iklam
1 /*
2 * Copyright (c) 1998, 2012, 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 */
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"
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 };
48 protected:
49 Symbol* _class_name;
50 Symbol* _method_name;
51 Symbol* _signature;
52 Mode _class_mode;
53 Mode _method_mode;
54 MethodMatcher* _next;
56 static bool match(Symbol* candidate, Symbol* match, Mode match_mode);
58 Symbol* class_name() const { return _class_name; }
59 Symbol* method_name() const { return _method_name; }
60 Symbol* signature() const { return _signature; }
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);
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 }
82 bool match(methodHandle method) {
83 return find(method) != NULL;
84 }
86 MethodMatcher* next() const { return _next; }
88 static void print_symbol(Symbol* h, Mode mode) {
89 ResourceMark rm;
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 }
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 }
112 virtual void print() {
113 print_base();
114 tty->cr();
115 }
116 };
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 }
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 }
139 bool MethodMatcher::match(Symbol* candidate, Symbol* match, Mode match_mode) {
140 if (match_mode == Any) {
141 return true;
142 }
144 if (match_mode == Exact) {
145 return candidate == match;
146 }
148 ResourceMark rm;
149 const char * candidate_string = candidate->as_C_string();
150 const char * match_string = match->as_C_string();
152 switch (match_mode) {
153 case Prefix:
154 return strstr(candidate_string, match_string) == candidate_string;
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 }
162 case Substring:
163 return strstr(candidate_string, match_string) != NULL;
165 default:
166 return false;
167 }
168 }
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 }
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 }
196 MethodOptionMatcher* next() {
197 return (MethodOptionMatcher*)_next;
198 }
200 virtual void print() {
201 print_base();
202 tty->print(" %s", option);
203 tty->cr();
204 }
205 };
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 };
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 };
240 static const char * command_name(OracleCommand command) {
241 if (command < OracleFirstCommand || command >= OracleCommandCount) {
242 return "unknown command";
243 }
244 return command_names[command];
245 }
247 class MethodMatcher;
248 static MethodMatcher* lists[OracleCommandCount] = { 0, };
251 static bool check_predicate(OracleCommand command, methodHandle method) {
252 return ((lists[command] != NULL) &&
253 !method.is_null() &&
254 lists[command]->match(method));
255 }
258 static MethodMatcher* add_predicate(OracleCommand command,
259 Symbol* class_name, MethodMatcher::Mode c_mode,
260 Symbol* method_name, MethodMatcher::Mode m_mode,
261 Symbol* signature) {
262 assert(command != OptionCommand, "must use add_option_string");
263 if (command == LogCommand && !LogCompilation && lists[LogCommand] == NULL)
264 tty->print_cr("Warning: +LogCompilation must be enabled in order for individual methods to be logged.");
265 lists[command] = new MethodMatcher(class_name, c_mode, method_name, m_mode, signature, lists[command]);
266 return lists[command];
267 }
271 static MethodMatcher* add_option_string(Symbol* class_name, MethodMatcher::Mode c_mode,
272 Symbol* method_name, MethodMatcher::Mode m_mode,
273 Symbol* signature,
274 const char* option) {
275 lists[OptionCommand] = new MethodOptionMatcher(class_name, c_mode, method_name, m_mode,
276 signature, option, lists[OptionCommand]);
277 return lists[OptionCommand];
278 }
281 bool CompilerOracle::has_option_string(methodHandle method, const char* option) {
282 return lists[OptionCommand] != NULL &&
283 ((MethodOptionMatcher*)lists[OptionCommand])->match(method, option);
284 }
287 bool CompilerOracle::should_exclude(methodHandle method, bool& quietly) {
288 quietly = true;
289 if (lists[ExcludeCommand] != NULL) {
290 if (lists[ExcludeCommand]->match(method)) {
291 quietly = _quiet;
292 return true;
293 }
294 }
296 if (lists[CompileOnlyCommand] != NULL) {
297 return !lists[CompileOnlyCommand]->match(method);
298 }
299 return false;
300 }
303 bool CompilerOracle::should_inline(methodHandle method) {
304 return (check_predicate(InlineCommand, method));
305 }
308 bool CompilerOracle::should_not_inline(methodHandle method) {
309 return (check_predicate(DontInlineCommand, method));
310 }
313 bool CompilerOracle::should_print(methodHandle method) {
314 return (check_predicate(PrintCommand, method));
315 }
318 bool CompilerOracle::should_log(methodHandle method) {
319 if (!LogCompilation) return false;
320 if (lists[LogCommand] == NULL) return true; // by default, log all
321 return (check_predicate(LogCommand, method));
322 }
325 bool CompilerOracle::should_break_at(methodHandle method) {
326 return check_predicate(BreakCommand, method);
327 }
330 static OracleCommand parse_command_name(const char * line, int* bytes_read) {
331 assert(ARRAY_SIZE(command_names) == OracleCommandCount,
332 "command_names size mismatch");
334 *bytes_read = 0;
335 char command[33];
336 int result = sscanf(line, "%32[a-z]%n", command, bytes_read);
337 for (uint i = 0; i < ARRAY_SIZE(command_names); i++) {
338 if (strcmp(command, command_names[i]) == 0) {
339 return (OracleCommand)i;
340 }
341 }
342 return UnknownCommand;
343 }
346 static void usage() {
347 tty->print_cr(" CompileCommand and the CompilerOracle allows simple control over");
348 tty->print_cr(" what's allowed to be compiled. The standard supported directives");
349 tty->print_cr(" are exclude and compileonly. The exclude directive stops a method");
350 tty->print_cr(" from being compiled and compileonly excludes all methods except for");
351 tty->print_cr(" the ones mentioned by compileonly directives. The basic form of");
352 tty->print_cr(" all commands is a command name followed by the name of the method");
353 tty->print_cr(" in one of two forms: the standard class file format as in");
354 tty->print_cr(" class/name.methodName or the PrintCompilation format");
355 tty->print_cr(" class.name::methodName. The method name can optionally be followed");
356 tty->print_cr(" by a space then the signature of the method in the class file");
357 tty->print_cr(" format. Otherwise the directive applies to all methods with the");
358 tty->print_cr(" same name and class regardless of signature. Leading and trailing");
359 tty->print_cr(" *'s in the class and/or method name allows a small amount of");
360 tty->print_cr(" wildcarding. ");
361 tty->cr();
362 tty->print_cr(" Examples:");
363 tty->cr();
364 tty->print_cr(" exclude java/lang/StringBuffer.append");
365 tty->print_cr(" compileonly java/lang/StringBuffer.toString ()Ljava/lang/String;");
366 tty->print_cr(" exclude java/lang/String*.*");
367 tty->print_cr(" exclude *.toString");
368 }
371 // The characters allowed in a class or method name. All characters > 0x7f
372 // are allowed in order to handle obfuscated class files (e.g. Volano)
373 #define RANGEBASE "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789$_<>" \
374 "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f" \
375 "\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f" \
376 "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf" \
377 "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf" \
378 "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf" \
379 "\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf" \
380 "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef" \
381 "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
383 #define RANGE0 "[*" RANGEBASE "]"
384 #define RANGEDOT "[*" RANGEBASE ".]"
385 #define RANGESLASH "[*" RANGEBASE "/]"
388 // Accept several syntaxes for these patterns
389 // original syntax
390 // cmd java.lang.String foo
391 // PrintCompilation syntax
392 // cmd java.lang.String::foo
393 // VM syntax
394 // cmd java/lang/String[. ]foo
395 //
397 static const char* patterns[] = {
398 "%*[ \t]%255" RANGEDOT " " "%255" RANGE0 "%n",
399 "%*[ \t]%255" RANGEDOT "::" "%255" RANGE0 "%n",
400 "%*[ \t]%255" RANGESLASH "%*[ .]" "%255" RANGE0 "%n",
401 };
403 static MethodMatcher::Mode check_mode(char name[], const char*& error_msg) {
404 int match = MethodMatcher::Exact;
405 while (name[0] == '*') {
406 match |= MethodMatcher::Suffix;
407 strcpy(name, name + 1);
408 }
410 if (strcmp(name, "*") == 0) return MethodMatcher::Any;
412 size_t len = strlen(name);
413 while (len > 0 && name[len - 1] == '*') {
414 match |= MethodMatcher::Prefix;
415 name[--len] = '\0';
416 }
418 if (strstr(name, "*") != NULL) {
419 error_msg = " Embedded * not allowed";
420 return MethodMatcher::Unknown;
421 }
422 return (MethodMatcher::Mode)match;
423 }
425 static bool scan_line(const char * line,
426 char class_name[], MethodMatcher::Mode* c_mode,
427 char method_name[], MethodMatcher::Mode* m_mode,
428 int* bytes_read, const char*& error_msg) {
429 *bytes_read = 0;
430 error_msg = NULL;
431 for (uint i = 0; i < ARRAY_SIZE(patterns); i++) {
432 if (2 == sscanf(line, patterns[i], class_name, method_name, bytes_read)) {
433 *c_mode = check_mode(class_name, error_msg);
434 *m_mode = check_mode(method_name, error_msg);
435 return *c_mode != MethodMatcher::Unknown && *m_mode != MethodMatcher::Unknown;
436 }
437 }
438 return false;
439 }
443 void CompilerOracle::parse_from_line(char* line) {
444 if (line[0] == '\0') return;
445 if (line[0] == '#') return;
447 bool have_colon = (strstr(line, "::") != NULL);
448 for (char* lp = line; *lp != '\0'; lp++) {
449 // Allow '.' to separate the class name from the method name.
450 // This is the preferred spelling of methods:
451 // exclude java/lang/String.indexOf(I)I
452 // Allow ',' for spaces (eases command line quoting).
453 // exclude,java/lang/String.indexOf
454 // For backward compatibility, allow space as separator also.
455 // exclude java/lang/String indexOf
456 // exclude,java/lang/String,indexOf
457 // For easy cut-and-paste of method names, allow VM output format
458 // as produced by Method::print_short_name:
459 // exclude java.lang.String::indexOf
460 // For simple implementation convenience here, convert them all to space.
461 if (have_colon) {
462 if (*lp == '.') *lp = '/'; // dots build the package prefix
463 if (*lp == ':') *lp = ' ';
464 }
465 if (*lp == ',' || *lp == '.') *lp = ' ';
466 }
468 char* original_line = line;
469 int bytes_read;
470 OracleCommand command = parse_command_name(line, &bytes_read);
471 line += bytes_read;
473 if (command == UnknownCommand) {
474 tty->print_cr("CompilerOracle: unrecognized line");
475 tty->print_cr(" \"%s\"", original_line);
476 return;
477 }
479 if (command == QuietCommand) {
480 _quiet = true;
481 return;
482 }
484 if (command == HelpCommand) {
485 usage();
486 return;
487 }
489 MethodMatcher::Mode c_match = MethodMatcher::Exact;
490 MethodMatcher::Mode m_match = MethodMatcher::Exact;
491 char class_name[256];
492 char method_name[256];
493 char sig[1024];
494 char errorbuf[1024];
495 const char* error_msg = NULL;
496 MethodMatcher* match = NULL;
498 if (scan_line(line, class_name, &c_match, method_name, &m_match, &bytes_read, error_msg)) {
499 EXCEPTION_MARK;
500 Symbol* c_name = SymbolTable::new_symbol(class_name, CHECK);
501 Symbol* m_name = SymbolTable::new_symbol(method_name, CHECK);
502 Symbol* signature = NULL;
504 line += bytes_read;
505 // there might be a signature following the method.
506 // signatures always begin with ( so match that by hand
507 if (1 == sscanf(line, "%*[ \t](%254[[);/" RANGEBASE "]%n", sig + 1, &bytes_read)) {
508 sig[0] = '(';
509 line += bytes_read;
510 signature = SymbolTable::new_symbol(sig, CHECK);
511 }
513 if (command == OptionCommand) {
514 // Look for trailing options to support
515 // ciMethod::has_option("string") to control features in the
516 // compiler. Multiple options may follow the method name.
517 char option[256];
518 while (sscanf(line, "%*[ \t]%255[a-zA-Z0-9]%n", option, &bytes_read) == 1) {
519 if (match != NULL && !_quiet) {
520 // Print out the last match added
521 tty->print("CompilerOracle: %s ", command_names[command]);
522 match->print();
523 }
524 match = add_option_string(c_name, c_match, m_name, m_match, signature, strdup(option));
525 line += bytes_read;
526 }
527 } else {
528 bytes_read = 0;
529 sscanf(line, "%*[ \t]%n", &bytes_read);
530 if (line[bytes_read] != '\0') {
531 jio_snprintf(errorbuf, sizeof(errorbuf), " Unrecognized text after command: %s", line);
532 error_msg = errorbuf;
533 } else {
534 match = add_predicate(command, c_name, c_match, m_name, m_match, signature);
535 }
536 }
537 }
539 if (match != NULL) {
540 if (!_quiet) {
541 ResourceMark rm;
542 tty->print("CompilerOracle: %s ", command_names[command]);
543 match->print();
544 }
545 } else {
546 tty->print_cr("CompilerOracle: unrecognized line");
547 tty->print_cr(" \"%s\"", original_line);
548 if (error_msg != NULL) {
549 tty->print_cr(error_msg);
550 }
551 }
552 }
554 static const char* default_cc_file = ".hotspot_compiler";
556 static const char* cc_file() {
557 #ifdef ASSERT
558 if (CompileCommandFile == NULL)
559 return default_cc_file;
560 #endif
561 return CompileCommandFile;
562 }
564 bool CompilerOracle::has_command_file() {
565 return cc_file() != NULL;
566 }
568 bool CompilerOracle::_quiet = false;
570 void CompilerOracle::parse_from_file() {
571 assert(has_command_file(), "command file must be specified");
572 FILE* stream = fopen(cc_file(), "rt");
573 if (stream == NULL) return;
575 char token[1024];
576 int pos = 0;
577 int c = getc(stream);
578 while(c != EOF && pos < (int)(sizeof(token)-1)) {
579 if (c == '\n') {
580 token[pos++] = '\0';
581 parse_from_line(token);
582 pos = 0;
583 } else {
584 token[pos++] = c;
585 }
586 c = getc(stream);
587 }
588 token[pos++] = '\0';
589 parse_from_line(token);
591 fclose(stream);
592 }
594 void CompilerOracle::parse_from_string(const char* str, void (*parse_line)(char*)) {
595 char token[1024];
596 int pos = 0;
597 const char* sp = str;
598 int c = *sp++;
599 while (c != '\0' && pos < (int)(sizeof(token)-1)) {
600 if (c == '\n') {
601 token[pos++] = '\0';
602 parse_line(token);
603 pos = 0;
604 } else {
605 token[pos++] = c;
606 }
607 c = *sp++;
608 }
609 token[pos++] = '\0';
610 parse_line(token);
611 }
613 void CompilerOracle::append_comment_to_file(const char* message) {
614 assert(has_command_file(), "command file must be specified");
615 fileStream stream(fopen(cc_file(), "at"));
616 stream.print("# ");
617 for (int index = 0; message[index] != '\0'; index++) {
618 stream.put(message[index]);
619 if (message[index] == '\n') stream.print("# ");
620 }
621 stream.cr();
622 }
624 void CompilerOracle::append_exclude_to_file(methodHandle method) {
625 assert(has_command_file(), "command file must be specified");
626 fileStream stream(fopen(cc_file(), "at"));
627 stream.print("exclude ");
628 method->method_holder()->name()->print_symbol_on(&stream);
629 stream.print(".");
630 method->name()->print_symbol_on(&stream);
631 method->signature()->print_symbol_on(&stream);
632 stream.cr();
633 stream.cr();
634 }
637 void compilerOracle_init() {
638 CompilerOracle::parse_from_string(CompileCommand, CompilerOracle::parse_from_line);
639 CompilerOracle::parse_from_string(CompileOnly, CompilerOracle::parse_compile_only);
640 if (CompilerOracle::has_command_file()) {
641 CompilerOracle::parse_from_file();
642 } else {
643 struct stat buf;
644 if (os::stat(default_cc_file, &buf) == 0) {
645 warning("%s file is present but has been ignored. "
646 "Run with -XX:CompileCommandFile=%s to load the file.",
647 default_cc_file, default_cc_file);
648 }
649 }
650 if (lists[PrintCommand] != NULL) {
651 if (PrintAssembly) {
652 warning("CompileCommand and/or %s file contains 'print' commands, but PrintAssembly is also enabled", default_cc_file);
653 } else if (FLAG_IS_DEFAULT(DebugNonSafepoints)) {
654 warning("printing of assembly code is enabled; turning on DebugNonSafepoints to gain additional output");
655 DebugNonSafepoints = true;
656 }
657 }
658 }
661 void CompilerOracle::parse_compile_only(char * line) {
662 int i;
663 char name[1024];
664 const char* className = NULL;
665 const char* methodName = NULL;
667 bool have_colon = (strstr(line, "::") != NULL);
668 char method_sep = have_colon ? ':' : '.';
670 if (Verbose) {
671 tty->print_cr(line);
672 }
674 ResourceMark rm;
675 while (*line != '\0') {
676 MethodMatcher::Mode c_match = MethodMatcher::Exact;
677 MethodMatcher::Mode m_match = MethodMatcher::Exact;
679 for (i = 0;
680 i < 1024 && *line != '\0' && *line != method_sep && *line != ',' && !isspace(*line);
681 line++, i++) {
682 name[i] = *line;
683 if (name[i] == '.') name[i] = '/'; // package prefix uses '/'
684 }
686 if (i > 0) {
687 char* newName = NEW_RESOURCE_ARRAY( char, i + 1);
688 if (newName == NULL)
689 return;
690 strncpy(newName, name, i);
691 newName[i] = '\0';
693 if (className == NULL) {
694 className = newName;
695 c_match = MethodMatcher::Prefix;
696 } else {
697 methodName = newName;
698 }
699 }
701 if (*line == method_sep) {
702 if (className == NULL) {
703 className = "";
704 c_match = MethodMatcher::Any;
705 } else {
706 // foo/bar.blah is an exact match on foo/bar, bar.blah is a suffix match on bar
707 if (strchr(className, '/') != NULL) {
708 c_match = MethodMatcher::Exact;
709 } else {
710 c_match = MethodMatcher::Suffix;
711 }
712 }
713 } else {
714 // got foo or foo/bar
715 if (className == NULL) {
716 ShouldNotReachHere();
717 } else {
718 // got foo or foo/bar
719 if (strchr(className, '/') != NULL) {
720 c_match = MethodMatcher::Prefix;
721 } else if (className[0] == '\0') {
722 c_match = MethodMatcher::Any;
723 } else {
724 c_match = MethodMatcher::Substring;
725 }
726 }
727 }
729 // each directive is terminated by , or NUL or . followed by NUL
730 if (*line == ',' || *line == '\0' || (line[0] == '.' && line[1] == '\0')) {
731 if (methodName == NULL) {
732 methodName = "";
733 if (*line != method_sep) {
734 m_match = MethodMatcher::Any;
735 }
736 }
738 EXCEPTION_MARK;
739 Symbol* c_name = SymbolTable::new_symbol(className, CHECK);
740 Symbol* m_name = SymbolTable::new_symbol(methodName, CHECK);
741 Symbol* signature = NULL;
743 add_predicate(CompileOnlyCommand, c_name, c_match, m_name, m_match, signature);
744 if (PrintVMOptions) {
745 tty->print("CompileOnly: compileonly ");
746 lists[CompileOnlyCommand]->print();
747 }
749 className = NULL;
750 methodName = NULL;
751 }
753 line = *line == '\0' ? line : line + 1;
754 }
755 }