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  */
  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 static const char * command_name(OracleCommand command) {
 241   if (command < OracleFirstCommand || command >= OracleCommandCount) {
 242     return "unknown command";
 243   }
 244   return command_names[command];
 245 }
 246 
 247 class MethodMatcher;
 248 static MethodMatcher* lists[OracleCommandCount] = { 0, };
 249 
 250 
 251 static bool check_predicate(OracleCommand command, methodHandle method) {
 252   return ((lists[command] != NULL) &&
 253           !method.is_null() &&
 254           lists[command]->match(method));
 255 }
 256 
 257 
 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 }
 268 
 269 
 270 
 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 }
 279 
 280 
 281 bool CompilerOracle::has_option_string(methodHandle method, const char* option) {
 282   return lists[OptionCommand] != NULL &&
 283     ((MethodOptionMatcher*)lists[OptionCommand])->match(method, option);
 284 }
 285 
 286 
 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   }
 295 
 296   if (lists[CompileOnlyCommand] != NULL) {
 297     return !lists[CompileOnlyCommand]->match(method);
 298   }
 299   return false;
 300 }
 301 
 302 
 303 bool CompilerOracle::should_inline(methodHandle method) {
 304   return (check_predicate(InlineCommand, method));
 305 }
 306 
 307 
 308 bool CompilerOracle::should_not_inline(methodHandle method) {
 309   return (check_predicate(DontInlineCommand, method));
 310 }
 311 
 312 
 313 bool CompilerOracle::should_print(methodHandle method) {
 314   return (check_predicate(PrintCommand, method));
 315 }
 316 
 317 
 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 }
 323 
 324 
 325 bool CompilerOracle::should_break_at(methodHandle method) {
 326   return check_predicate(BreakCommand, method);
 327 }
 328 
 329 
 330 static OracleCommand parse_command_name(const char * line, int* bytes_read) {
 331   assert(ARRAY_SIZE(command_names) == OracleCommandCount,
 332          "command_names size mismatch");
 333 
 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 }
 344 
 345 
 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 }
 369 
 370 
 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"
 382 
 383 #define RANGE0 "[*" RANGEBASE "]"
 384 #define RANGEDOT "[*" RANGEBASE ".]"
 385 #define RANGESLASH "[*" RANGEBASE "/]"
 386 
 387 
 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 //
 396 
 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 };
 402 
 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   }
 409 
 410   if (strcmp(name, "*") == 0) return MethodMatcher::Any;
 411 
 412   size_t len = strlen(name);
 413   while (len > 0 && name[len - 1] == '*') {
 414     match |= MethodMatcher::Prefix;
 415     name[--len] = '\0';
 416   }
 417 
 418   if (strstr(name, "*") != NULL) {
 419     error_msg = "  Embedded * not allowed";
 420     return MethodMatcher::Unknown;
 421   }
 422   return (MethodMatcher::Mode)match;
 423 }
 424 
 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 }
 440 
 441 
 442 
 443 void CompilerOracle::parse_from_line(char* line) {
 444   if (line[0] == '\0') return;
 445   if (line[0] == '#')  return;
 446 
 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   }
 467 
 468   char* original_line = line;
 469   int bytes_read;
 470   OracleCommand command = parse_command_name(line, &bytes_read);
 471   line += bytes_read;
 472 
 473   if (command == UnknownCommand) {
 474     tty->print_cr("CompilerOracle: unrecognized line");
 475     tty->print_cr("  \"%s\"", original_line);
 476     return;
 477   }
 478 
 479   if (command == QuietCommand) {
 480     _quiet = true;
 481     return;
 482   }
 483 
 484   if (command == HelpCommand) {
 485     usage();
 486     return;
 487   }
 488 
 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;
 497 
 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;
 503 
 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     }
 512 
 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   }
 538 
 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 }
 553 
 554 static const char* default_cc_file = ".hotspot_compiler";
 555 
 556 static const char* cc_file() {
 557 #ifdef ASSERT
 558   if (CompileCommandFile == NULL)
 559     return default_cc_file;
 560 #endif
 561   return CompileCommandFile;
 562 }
 563 
 564 bool CompilerOracle::has_command_file() {
 565   return cc_file() != NULL;
 566 }
 567 
 568 bool CompilerOracle::_quiet = false;
 569 
 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;
 574 
 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);
 590 
 591   fclose(stream);
 592 }
 593 
 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 }
 612 
 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 }
 623 
 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 }
 635 
 636 
 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 }
 659 
 660 
 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;
 666 
 667   bool have_colon = (strstr(line, "::") != NULL);
 668   char method_sep = have_colon ? ':' : '.';
 669 
 670   if (Verbose) {
 671     tty->print_cr(line);
 672   }
 673 
 674   ResourceMark rm;
 675   while (*line != '\0') {
 676     MethodMatcher::Mode c_match = MethodMatcher::Exact;
 677     MethodMatcher::Mode m_match = MethodMatcher::Exact;
 678 
 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     }
 685 
 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';
 692 
 693       if (className == NULL) {
 694         className = newName;
 695         c_match = MethodMatcher::Prefix;
 696       } else {
 697         methodName = newName;
 698       }
 699     }
 700 
 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     }
 728 
 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       }
 737 
 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;
 742 
 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       }
 748 
 749       className = NULL;
 750       methodName = NULL;
 751     }
 752 
 753     line = *line == '\0' ? line : line + 1;
 754   }
 755 }