1 /* 2 * Copyright (c) 2011, 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 "memory/oopFactory.hpp" 27 #include "runtime/javaCalls.hpp" 28 #include "runtime/mutexLocker.hpp" 29 #include "services/diagnosticArgument.hpp" 30 #include "services/diagnosticFramework.hpp" 31 #include "services/management.hpp" 32 33 CmdLine::CmdLine(const char* line, size_t len, bool no_command_name) { 34 assert(line != NULL, "Command line string should not be NULL"); 35 const char* line_end; 36 const char* cmd_end; 37 38 _cmd = line; 39 line_end = &line[len]; 40 41 // Skip whitespace in the beginning of the line. 42 while (_cmd < line_end && isspace((int) _cmd[0])) { 43 _cmd++; 44 } 45 cmd_end = _cmd; 46 47 if (no_command_name) { 48 _cmd = NULL; 49 _cmd_len = 0; 50 } else { 51 // Look for end of the command name 52 while (cmd_end < line_end && !isspace((int) cmd_end[0])) { 53 cmd_end++; 54 } 55 _cmd_len = cmd_end - line; 56 } 57 _args = cmd_end; 58 _args_len = len - _cmd_len; 59 } 60 61 bool DCmdArgIter::next(TRAPS) { 62 if (_len == 0) return false; 63 // skipping spaces 64 while (_cursor < _len - 1 && isspace(_buffer[_cursor])) { 65 _cursor++; 66 } 67 // handling end of command line 68 if (_cursor >= _len - 1) { 69 _cursor = _len - 1; 70 _key_addr = &_buffer[_len - 1]; 71 _key_len = 0; 72 _value_addr = &_buffer[_len - 1]; 73 _value_len = 0; 74 return false; 75 } 76 // extracting first item, argument or option name 77 _key_addr = &_buffer[_cursor]; 78 while (_cursor <= _len - 1 && _buffer[_cursor] != '=' && _buffer[_cursor] != _delim) { 79 // argument can be surrounded by simple or double quotes 80 if (_buffer[_cursor] == '\"' || _buffer[_cursor] == '\'') { 81 _key_addr++; 82 char quote = _buffer[_cursor]; 83 while (_cursor < _len - 1) { 84 _cursor++; 85 if (_buffer[_cursor] == quote && _buffer[_cursor - 1] != '\\') { 86 break; 87 } 88 } 89 if (_buffer[_cursor] != quote) { 90 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 91 "Format error in diagnostic command arguments", false); 92 } 93 break; 94 } 95 _cursor++; 96 } 97 _key_len = &_buffer[_cursor] - _key_addr; 98 // check if the argument has the <key>=<value> format 99 if (_cursor <= _len -1 && _buffer[_cursor] == '=') { 100 _cursor++; 101 _value_addr = &_buffer[_cursor]; 102 // extract the value 103 while (_cursor <= _len - 1 && _buffer[_cursor] != _delim) { 104 // value can be surrounded by simple or double quotes 105 if (_buffer[_cursor] == '\"' || _buffer[_cursor] == '\'') { 106 _value_addr++; 107 char quote = _buffer[_cursor]; 108 while (_cursor < _len - 1) { 109 _cursor++; 110 if (_buffer[_cursor] == quote && _buffer[_cursor - 1] != '\\') { 111 break; 112 } 113 } 114 if (_buffer[_cursor] != quote) { 115 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 116 "Format error in diagnostic command arguments", false); 117 } 118 break; 119 } 120 _cursor++; 121 } 122 _value_len = &_buffer[_cursor] - _value_addr; 123 } else { 124 _value_addr = NULL; 125 _value_len = 0; 126 } 127 return _key_len != 0; 128 } 129 130 bool DCmdInfo::by_name(void* cmd_name, DCmdInfo* info) { 131 if (info == NULL) return false; 132 return strcmp((const char*)cmd_name, info->name()) == 0; 133 } 134 135 void DCmdParser::add_dcmd_option(GenDCmdArgument* arg) { 136 assert(arg != NULL, "Sanity"); 137 if (_options == NULL) { 138 _options = arg; 139 } else { 140 GenDCmdArgument* o = _options; 141 while (o->next() != NULL) { 142 o = o->next(); 143 } 144 o->set_next(arg); 145 } 146 arg->set_next(NULL); 147 Thread* THREAD = Thread::current(); 148 arg->init_value(THREAD); 149 if (HAS_PENDING_EXCEPTION) { 150 fatal("Initialization must be successful"); 151 } 152 } 153 154 void DCmdParser::add_dcmd_argument(GenDCmdArgument* arg) { 155 assert(arg != NULL, "Sanity"); 156 if (_arguments_list == NULL) { 157 _arguments_list = arg; 158 } else { 159 GenDCmdArgument* a = _arguments_list; 160 while (a->next() != NULL) { 161 a = a->next(); 162 } 163 a->set_next(arg); 164 } 165 arg->set_next(NULL); 166 Thread* THREAD = Thread::current(); 167 arg->init_value(THREAD); 168 if (HAS_PENDING_EXCEPTION) { 169 fatal("Initialization must be successful"); 170 } 171 } 172 173 void DCmdParser::parse(CmdLine* line, char delim, TRAPS) { 174 GenDCmdArgument* next_argument = _arguments_list; 175 DCmdArgIter iter(line->args_addr(), line->args_len(), delim); 176 bool cont = iter.next(CHECK); 177 while (cont) { 178 GenDCmdArgument* arg = lookup_dcmd_option(iter.key_addr(), 179 iter.key_length()); 180 if (arg != NULL) { 181 arg->read_value(iter.value_addr(), iter.value_length(), CHECK); 182 } else { 183 if (next_argument != NULL) { 184 arg = next_argument; 185 arg->read_value(iter.key_addr(), iter.key_length(), CHECK); 186 next_argument = next_argument->next(); 187 } else { 188 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 189 "Unknown argument in diagnostic command"); 190 } 191 } 192 cont = iter.next(CHECK); 193 } 194 check(CHECK); 195 } 196 197 GenDCmdArgument* DCmdParser::lookup_dcmd_option(const char* name, size_t len) { 198 GenDCmdArgument* arg = _options; 199 while (arg != NULL) { 200 if (strlen(arg->name()) == len && 201 strncmp(name, arg->name(), len) == 0) { 202 return arg; 203 } 204 arg = arg->next(); 205 } 206 return NULL; 207 } 208 209 void DCmdParser::check(TRAPS) { 210 GenDCmdArgument* arg = _arguments_list; 211 while (arg != NULL) { 212 if (arg->is_mandatory() && !arg->has_value()) { 213 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 214 "Missing argument for diagnostic command"); 215 } 216 arg = arg->next(); 217 } 218 arg = _options; 219 while (arg != NULL) { 220 if (arg->is_mandatory() && !arg->has_value()) { 221 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 222 "Missing option for diagnostic command"); 223 } 224 arg = arg->next(); 225 } 226 } 227 228 void DCmdParser::print_help(outputStream* out, const char* cmd_name) { 229 out->print("\nSyntax : %s %s", cmd_name, _options == NULL ? "" : "[options]"); 230 GenDCmdArgument* arg = _arguments_list; 231 while (arg != NULL) { 232 if (arg->is_mandatory()) { 233 out->print(" <%s>", arg->name()); 234 } else { 235 out->print(" [<%s>]", arg->name()); 236 } 237 arg = arg->next(); 238 } 239 out->print_cr(""); 240 if (_arguments_list != NULL) { 241 out->print_cr("\nArguments:"); 242 arg = _arguments_list; 243 while (arg != NULL) { 244 out->print("\t%s : %s %s (%s, ", arg->name(), 245 arg->is_mandatory() ? "" : "[optional]", 246 arg->description(), arg->type()); 247 if (arg->has_default()) { 248 out->print(arg->default_string()); 249 } else { 250 out->print("no default value"); 251 } 252 out->print_cr(")"); 253 arg = arg->next(); 254 } 255 } 256 if (_options != NULL) { 257 out->print_cr("\nOptions: (options must be specified using the <key> or <key>=<value> syntax)"); 258 arg = _options; 259 while (arg != NULL) { 260 out->print("\t%s : %s %s (%s, ", arg->name(), 261 arg->is_mandatory() ? "" : "[optional]", 262 arg->description(), arg->type()); 263 if (arg->has_default()) { 264 out->print(arg->default_string()); 265 } else { 266 out->print("no default value"); 267 } 268 out->print_cr(")"); 269 arg = arg->next(); 270 } 271 } 272 } 273 274 void DCmdParser::reset(TRAPS) { 275 GenDCmdArgument* arg = _arguments_list; 276 while (arg != NULL) { 277 arg->reset(CHECK); 278 arg = arg->next(); 279 } 280 arg = _options; 281 while (arg != NULL) { 282 arg->reset(CHECK); 283 arg = arg->next(); 284 } 285 } 286 287 void DCmdParser::cleanup() { 288 GenDCmdArgument* arg = _arguments_list; 289 while (arg != NULL) { 290 arg->cleanup(); 291 arg = arg->next(); 292 } 293 arg = _options; 294 while (arg != NULL) { 295 arg->cleanup(); 296 arg = arg->next(); 297 } 298 } 299 300 int DCmdParser::num_arguments() { 301 GenDCmdArgument* arg = _arguments_list; 302 int count = 0; 303 while (arg != NULL) { 304 count++; 305 arg = arg->next(); 306 } 307 arg = _options; 308 while (arg != NULL) { 309 count++; 310 arg = arg->next(); 311 } 312 return count; 313 } 314 315 GrowableArray<const char *>* DCmdParser::argument_name_array() { 316 int count = num_arguments(); 317 GrowableArray<const char *>* array = new GrowableArray<const char *>(count); 318 int idx = 0; 319 GenDCmdArgument* arg = _arguments_list; 320 while(arg != NULL) { 321 array->append(arg->name()); 322 idx++; 323 arg = arg->next(); 324 } 325 arg = _options; 326 while(arg != NULL) { 327 array->append(arg->name()); 328 idx++; 329 arg = arg->next(); 330 } 331 return array; 332 } 333 334 GrowableArray<DCmdArgumentInfo*>* DCmdParser::argument_info_array() { 335 int count = num_arguments(); 336 GrowableArray<DCmdArgumentInfo*>* array = new GrowableArray<DCmdArgumentInfo *>(count); 337 int idx = 0; 338 GenDCmdArgument* arg = _arguments_list; 339 while (arg != NULL) { 340 array->append(new DCmdArgumentInfo(arg->name(), arg->description(), 341 arg->type(), arg->default_string(), arg->is_mandatory(), 342 false, idx)); 343 idx++; 344 arg = arg->next(); 345 } 346 arg = _options; 347 while (arg != NULL) { 348 array->append(new DCmdArgumentInfo(arg->name(), arg->description(), 349 arg->type(), arg->default_string(), arg->is_mandatory(), 350 true)); 351 idx++; 352 arg = arg->next(); 353 } 354 return array; 355 } 356 357 DCmdFactory* DCmdFactory::_DCmdFactoryList = NULL; 358 359 void DCmd::parse_and_execute(outputStream* out, const char* cmdline, 360 char delim, TRAPS) { 361 362 if (cmdline == NULL) return; // Nothing to do! 363 DCmdIter iter(cmdline, '\n'); 364 365 while (iter.has_next()) { 366 CmdLine line = iter.next(); 367 if(line.is_stop()) { 368 break; 369 } 370 if (line.is_executable()) { 371 DCmd* command = DCmdFactory::create_local_DCmd(line,out, CHECK); 372 assert(command != NULL,"command error must be handled before this line"); 373 DCmdMark mark(command); 374 command->parse(&line, delim, CHECK); 375 command->execute(CHECK); 376 } 377 } 378 } 379 380 Mutex* DCmdFactory::_dcmdFactory_lock = new Mutex(Mutex::leaf,"DCmdFactory",true); 381 382 DCmdFactory* DCmdFactory::factory(const char* name, size_t len) { 383 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag); 384 DCmdFactory* factory = _DCmdFactoryList; 385 while (factory != NULL) { 386 if (strlen(factory->name()) == len && 387 strncmp(name,factory->name(), len) == 0) { 388 return factory; 389 } 390 factory = factory->_next; 391 } 392 return NULL; 393 } 394 395 int DCmdFactory::register_DCmdFactory(DCmdFactory* factory) { 396 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag); 397 factory->_next = _DCmdFactoryList; 398 _DCmdFactoryList = factory; 399 return 0; // Actually, there's no checks for duplicates 400 } 401 402 DCmd* DCmdFactory::create_global_DCmd(CmdLine &line, outputStream* out, TRAPS) { 403 DCmdFactory* f = factory(line.cmd_addr(),line.cmd_len()); 404 if (f != NULL) { 405 if (f->is_enabled()) { 406 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 407 f->disabled_message()); 408 } 409 return f->create_Cheap_instance(out); 410 } 411 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 412 "Unknown diagnostic command"); 413 } 414 415 DCmd* DCmdFactory::create_local_DCmd(CmdLine &line, outputStream* out, TRAPS) { 416 DCmdFactory* f = factory(line.cmd_addr(),line.cmd_len()); 417 if (f != NULL) { 418 if (!f->is_enabled()) { 419 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 420 f->disabled_message()); 421 } 422 return f->create_resource_instance(out); 423 } 424 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 425 "Unknown diagnostic command"); 426 } 427 428 GrowableArray<const char*>* DCmdFactory::DCmd_list() { 429 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag); 430 GrowableArray<const char*>* array = new GrowableArray<const char*>(); 431 DCmdFactory* factory = _DCmdFactoryList; 432 while (factory != NULL) { 433 if (!factory->is_hidden()) { 434 array->append(factory->name()); 435 } 436 factory = factory->next(); 437 } 438 return array; 439 } 440 441 GrowableArray<DCmdInfo*>* DCmdFactory::DCmdInfo_list() { 442 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag); 443 GrowableArray<DCmdInfo*>* array = new GrowableArray<DCmdInfo*>(); 444 DCmdFactory* factory = _DCmdFactoryList; 445 while (factory != NULL) { 446 if (!factory->is_hidden()) { 447 array->append(new DCmdInfo(factory->name(), 448 factory->description(), factory->impact(), 449 factory->num_arguments(), factory->is_enabled())); 450 } 451 factory = factory->next(); 452 } 453 return array; 454 }