Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaScriptEngine.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.utilities.soql; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import javax.script.Invocable; | |
| 30 import javax.script.ScriptContext; | |
| 31 import javax.script.ScriptEngine; | |
| 32 import javax.script.ScriptEngineManager; | |
| 33 import javax.script.ScriptException; | |
| 34 import sun.jvm.hotspot.debugger.*; | |
| 35 import sun.jvm.hotspot.oops.*; | |
| 36 import sun.jvm.hotspot.runtime.*; | |
| 37 import sun.jvm.hotspot.utilities.*; | |
| 38 import sun.jvm.hotspot.tools.*; | |
| 39 import sun.jvm.hotspot.tools.jcore.*; | |
| 40 import java.lang.reflect.Method; | |
| 41 import java.lang.reflect.Modifier; | |
| 42 | |
| 43 /** | |
| 44 * Simple wrapper around jsr-223 JavaScript script engine. | |
| 45 * In addition to wrapping useful functionality of jsr-223 engine, | |
| 46 * this class exposed certain "global" functions to the script. | |
| 47 */ | |
| 48 public abstract class JSJavaScriptEngine extends MapScriptObject { | |
| 49 /** | |
| 50 * Start a read-eval-print loop with this engine. | |
| 51 */ | |
| 52 public void startConsole() { | |
| 53 start(true); | |
| 54 } | |
| 55 | |
| 56 /** | |
| 57 * Initialize the engine so that we can "eval" strings | |
| 58 * and files later. | |
| 59 */ | |
| 60 public void start() { | |
| 61 start(false); | |
| 62 } | |
| 63 | |
| 64 /** | |
| 65 * Define a global function that invokes given Method. | |
| 66 */ | |
| 67 public void defineFunction(Object target, Method method) { | |
| 68 putFunction(target, method, false); | |
| 69 } | |
| 70 | |
| 71 /** | |
| 72 * Call the script function of given name passing the | |
| 73 * given arguments. | |
| 74 */ | |
| 75 public Object call(String name, Object[] args) { | |
| 76 Invocable invocable = (Invocable)engine; | |
| 77 try { | |
| 78 return invocable.invokeFunction(name, args); | |
| 79 } catch (RuntimeException re) { | |
| 80 throw re; | |
| 81 } catch (Exception exp) { | |
| 82 throw new RuntimeException(exp); | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 /** | |
| 87 address function returns address of JSJavaObject as String. For other | |
| 88 type of objects, the result is undefined. | |
| 89 */ | |
| 90 public Object address(Object[] args) { | |
| 91 if (args.length != 1) return UNDEFINED; | |
| 92 Object o = args[0]; | |
| 93 if (o != null && o instanceof JSJavaObject) { | |
| 94 return ((JSJavaObject)o).getOop().getHandle().toString(); | |
| 95 } else { | |
| 96 return UNDEFINED; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 | |
| 101 /** | |
| 102 classof function gets type of given JSJavaInstance or JSJavaArray. Or | |
| 103 given a string class name, this function gets the class object. For | |
| 104 other type of objects, the result is undefined. | |
| 105 */ | |
| 106 public Object classof(Object[] args) { | |
| 107 if (args.length != 1) { | |
| 108 return UNDEFINED; | |
| 109 } | |
| 110 Object o = args[0]; | |
| 111 if (o != null) { | |
| 112 if (o instanceof JSJavaObject) { | |
| 113 if (o instanceof JSJavaInstance) { | |
| 114 return ((JSJavaInstance)o).getJSJavaClass(); | |
| 115 } else if (o instanceof JSJavaArray) { | |
| 116 return ((JSJavaArray)o).getJSJavaClass(); | |
| 117 } else { | |
| 118 return UNDEFINED; | |
| 119 } | |
| 120 } else if (o instanceof String) { | |
| 121 InstanceKlass ik = SystemDictionaryHelper.findInstanceKlass((String) o); | |
| 122 return getJSJavaFactory().newJSJavaKlass(ik).getJSJavaClass(); | |
| 123 } else { | |
| 124 return UNDEFINED; | |
| 125 } | |
| 126 } else { | |
| 127 return UNDEFINED; | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 /** | |
| 132 * dumpClass function creates a .class file for a given Class object. | |
| 133 * On success, returns true. Else, returns false. Second optional argument | |
| 134 * specifies the directory in which .class content is dumped. This defaults | |
| 135 * to '.' | |
| 136 */ | |
| 137 public Object dumpClass(Object[] args) { | |
| 138 if (args.length == 0) { | |
| 139 return Boolean.FALSE; | |
| 140 } | |
| 141 Object clazz = args[0]; | |
| 142 if (clazz == null) { | |
| 143 return Boolean.FALSE; | |
| 144 } | |
| 145 InstanceKlass ik = null; | |
| 146 if (clazz instanceof String) { | |
| 147 String name = (String) clazz; | |
| 148 if (name.startsWith("0x")) { | |
| 149 // treat it as address | |
| 150 VM vm = VM.getVM(); | |
| 151 Address addr = vm.getDebugger().parseAddress(name); | |
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152 Metadata metadata = Metadata.instantiateWrapperFor(addr.addOffsetTo(0)); |
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153 if (metadata instanceof InstanceKlass) { |
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154 ik = (InstanceKlass) metadata; |
| 0 | 155 } else { |
| 156 return Boolean.FALSE; | |
| 157 } | |
| 158 } else { | |
| 159 ik = SystemDictionaryHelper.findInstanceKlass((String) clazz); | |
| 160 } | |
| 161 } else if (clazz instanceof JSJavaClass) { | |
| 162 JSJavaKlass jk = ((JSJavaClass)clazz).getJSJavaKlass(); | |
| 163 if (jk != null && jk instanceof JSJavaInstanceKlass) { | |
| 164 ik = ((JSJavaInstanceKlass)jk).getInstanceKlass(); | |
| 165 } | |
| 166 } else { | |
| 167 return Boolean.FALSE; | |
| 168 } | |
| 169 | |
| 170 if (ik == null) return Boolean.FALSE; | |
| 171 StringBuffer buf = new StringBuffer(); | |
| 172 if (args.length > 1) { | |
| 173 buf.append(args[1].toString()); | |
| 174 } else { | |
| 175 buf.append('.'); | |
| 176 } | |
| 177 | |
| 178 buf.append(File.separatorChar); | |
| 179 buf.append(ik.getName().asString().replace('/', File.separatorChar)); | |
| 180 buf.append(".class"); | |
| 181 String fileName = buf.toString(); | |
| 182 File file = new File(fileName); | |
| 183 | |
| 184 try { | |
| 185 int index = fileName.lastIndexOf(File.separatorChar); | |
| 186 File dir = new File(fileName.substring(0, index)); | |
| 187 dir.mkdirs(); | |
| 188 FileOutputStream fos = new FileOutputStream(file); | |
| 189 ClassWriter cw = new ClassWriter(ik, fos); | |
| 190 cw.write(); | |
| 191 fos.close(); | |
| 192 } catch (IOException exp) { | |
| 193 printError(exp.toString(), exp); | |
| 194 return Boolean.FALSE; | |
| 195 } | |
| 196 | |
| 197 return Boolean.TRUE; | |
| 198 } | |
| 199 | |
| 200 /** | |
| 201 * dumpHeap function creates a heap dump file. | |
| 202 * On success, returns true. Else, returns false. | |
| 203 */ | |
| 204 public Object dumpHeap(Object[] args) { | |
| 205 String fileName = "heap.bin"; | |
| 206 if (args.length > 0) { | |
| 207 fileName = args[0].toString(); | |
| 208 } | |
| 209 return new JMap().writeHeapHprofBin(fileName)? Boolean.TRUE: Boolean.FALSE; | |
| 210 } | |
| 211 | |
| 212 /** | |
| 213 help function prints help message for global functions and variables. | |
| 214 */ | |
| 215 public void help(Object[] args) { | |
| 216 println("Function/Variable Description"); | |
| 217 println("================= ==========="); | |
| 218 println("address(jobject) returns the address of the Java object"); | |
| 219 println("classof(jobject) returns the class object of the Java object"); | |
| 220 println("dumpClass(jclass,[dir]) writes .class for the given Java Class"); | |
| 221 println("dumpHeap([file]) writes heap in hprof binary format"); | |
| 222 println("help() prints this help message"); | |
| 223 println("identityHash(jobject) returns the hashCode of the Java object"); | |
| 224 println("mirror(jobject) returns a local mirror of the Java object"); | |
| 225 println("load([file1, file2,...]) loads JavaScript file(s). With no files, reads <stdin>"); | |
| 226 println("object(string) converts a string address into Java object"); | |
| 227 println("owner(jobject) returns the owner thread of this monitor or null"); | |
| 228 println("sizeof(jobject) returns the size of Java object in bytes"); | |
| 229 println("staticof(jclass, field) returns a static field of the given Java class"); | |
| 230 println("read([prompt]) reads a single line from standard input"); | |
| 231 println("quit() quits the interactive load call"); | |
| 232 println("jvm the target jvm that is being debugged"); | |
| 233 } | |
| 234 | |
| 235 /** | |
| 236 identityHash function gets identity hash code value of given | |
| 237 JSJavaObject. For other type of objects, the result is undefined. | |
| 238 */ | |
| 239 public Object identityHash(Object[] args) { | |
| 240 if (args.length != 1) return UNDEFINED; | |
| 241 Object o = args[0]; | |
| 242 if (o != null && o instanceof JSJavaObject) { | |
| 243 return new Long(((JSJavaObject)o).getOop().identityHash()); | |
| 244 } else { | |
| 245 return UNDEFINED; | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 | |
| 250 /** | |
| 251 * Load and execute a set of JavaScript source files. | |
| 252 * This method is defined as a JavaScript function. | |
| 253 */ | |
| 254 public void load(Object[] args) { | |
| 255 for (int i = 0; i < args.length; i++) { | |
| 256 processSource(args[i].toString()); | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 /** | |
| 261 mirror function creats local copy of the Oop wrapper supplied. | |
| 262 if mirror can not be created, return undefined. For other types, | |
| 263 mirror is undefined. | |
| 264 */ | |
| 265 public Object mirror(Object[] args) { | |
| 266 Object o = args[0]; | |
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267 Object res = UNDEFINED; |
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268 if (o != null) { |
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269 if (o instanceof JSJavaObject) { |
| 0 | 270 Oop oop = ((JSJavaObject)o).getOop(); |
| 271 try { | |
| 272 res = getObjectReader().readObject(oop); | |
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273 } catch (Exception e) { |
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274 if (debug) e.printStackTrace(getErrorStream()); |
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275 } |
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276 } else if (o instanceof JSMetadata) { |
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277 Metadata metadata = ((JSMetadata)o).getMetadata(); |
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278 try { |
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279 if (metadata instanceof InstanceKlass) { |
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280 res = getObjectReader().readClass((InstanceKlass) metadata); |
| 0 | 281 } |
| 282 } catch (Exception e) { | |
| 283 if (debug) e.printStackTrace(getErrorStream()); | |
| 284 } | |
| 285 } | |
| 286 } | |
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287 return res; |
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288 } |
| 0 | 289 |
| 290 /** | |
| 291 owner function gets owning thread of given JSJavaObjec, if any, else | |
| 292 returns null. For other type of objects, the result is undefined. | |
| 293 */ | |
| 294 public Object owner(Object[] args) { | |
| 295 Object o = args[0]; | |
| 296 if (o != null && o instanceof JSJavaObject) { | |
| 297 return getOwningThread((JSJavaObject)o); | |
| 298 } else { | |
| 299 return UNDEFINED; | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 /** | |
| 304 object function takes a string address and returns a JSJavaObject. | |
| 305 For other type of objects, the result is undefined. | |
| 306 */ | |
| 307 public Object object(Object[] args) { | |
| 308 Object o = args[0]; | |
| 309 if (o != null && o instanceof String) { | |
| 310 VM vm = VM.getVM(); | |
| 311 Address addr = vm.getDebugger().parseAddress((String)o); | |
| 312 Oop oop = vm.getObjectHeap().newOop(addr.addOffsetToAsOopHandle(0)); | |
| 313 return getJSJavaFactory().newJSJavaObject(oop); | |
| 314 } else { | |
| 315 return UNDEFINED; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 /** | |
| 320 sizeof function returns size of a Java object in bytes. For other type | |
| 321 of objects, the result is undefined. | |
| 322 */ | |
| 323 public Object sizeof(Object[] args) { | |
| 324 if (args.length != 1) return UNDEFINED; | |
| 325 Object o = args[0]; | |
| 326 if (o != null && o instanceof JSJavaObject) { | |
| 327 return new Long(((JSJavaObject)o).getOop().getObjectSize()); | |
| 328 } else { | |
| 329 return UNDEFINED; | |
| 330 } | |
| 331 } | |
| 332 | |
| 333 /** | |
| 334 staticof function gets static field of given class. Both class and | |
| 335 field name are specified as strings. undefined is returned if there is | |
| 336 no such named field. | |
| 337 */ | |
| 338 public Object staticof(Object[] args) { | |
| 339 Object classname = args[0]; | |
| 340 Object fieldname = args[1]; | |
| 341 if (fieldname == null || classname == null || | |
| 342 !(fieldname instanceof String)) { | |
| 343 return UNDEFINED; | |
| 344 } | |
| 345 | |
| 346 InstanceKlass ik = null; | |
| 347 if (classname instanceof JSJavaClass) { | |
| 348 JSJavaClass jclass = (JSJavaClass) classname; | |
| 349 JSJavaKlass jk = jclass.getJSJavaKlass(); | |
| 350 if (jk != null && jk instanceof JSJavaInstanceKlass) { | |
| 351 ik = ((JSJavaInstanceKlass)jk).getInstanceKlass(); | |
| 352 } | |
| 353 } else if (classname instanceof String) { | |
| 354 ik = SystemDictionaryHelper.findInstanceKlass((String)classname); | |
| 355 } else { | |
| 356 return UNDEFINED; | |
| 357 } | |
| 358 | |
| 359 if (ik == null) { | |
| 360 return UNDEFINED; | |
| 361 } | |
| 362 JSJavaFactory factory = getJSJavaFactory(); | |
| 363 try { | |
| 364 return ((JSJavaInstanceKlass) factory.newJSJavaKlass(ik)).getStaticFieldValue((String)fieldname); | |
| 365 } catch (NoSuchFieldException e) { | |
| 366 return UNDEFINED; | |
| 367 } | |
| 368 } | |
| 369 | |
| 370 /** | |
| 371 * read function reads a single line of input from standard input | |
| 372 */ | |
| 373 public Object read(Object[] args) { | |
| 374 BufferedReader in = getInputReader(); | |
| 375 if (in == null) { | |
| 376 return null; | |
| 377 } | |
| 378 if (args.length > 0) { | |
| 379 print(args[0].toString()); | |
| 380 print(":"); | |
| 381 } | |
| 382 try { | |
| 383 return in.readLine(); | |
| 384 } catch (IOException exp) { | |
| 385 exp.printStackTrace(); | |
| 386 throw new RuntimeException(exp); | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 /** | |
| 391 * Quit the shell. | |
| 392 * This only affects the interactive mode. | |
| 393 */ | |
| 394 public void quit(Object[] args) { | |
| 395 quit(); | |
| 396 } | |
| 397 | |
| 398 public void writeln(Object[] args) { | |
| 399 for (int i = 0; i < args.length; i++) { | |
| 400 print(args[i].toString()); | |
| 401 print(" "); | |
| 402 } | |
| 403 println(""); | |
| 404 } | |
| 405 | |
| 406 public void write(Object[] args) { | |
| 407 for (int i = 0; i < args.length; i++) { | |
| 408 print(args[i].toString()); | |
| 409 print(" "); | |
| 410 } | |
| 411 } | |
| 412 | |
| 413 //-- Internals only below this point | |
| 414 protected void start(boolean console) { | |
| 415 ScriptContext context = engine.getContext(); | |
| 416 OutputStream out = getOutputStream(); | |
| 417 if (out != null) { | |
| 418 context.setWriter(new PrintWriter(out)); | |
| 419 } | |
| 420 OutputStream err = getErrorStream(); | |
| 421 if (err != null) { | |
| 422 context.setErrorWriter(new PrintWriter(err)); | |
| 423 } | |
| 424 // load "sa.js" initialization file | |
| 425 loadInitFile(); | |
| 426 // load "~/jsdb.js" (if found) to perform user specific | |
| 427 // initialization steps, if any. | |
| 428 loadUserInitFile(); | |
| 429 | |
| 430 JSJavaFactory fac = getJSJavaFactory(); | |
| 431 JSJavaVM jvm = (fac != null)? fac.newJSJavaVM() : null; | |
| 432 // call "main" function from "sa.js" -- main expects | |
| 433 // 'this' object and jvm object | |
| 434 call("main", new Object[] { this, jvm }); | |
| 435 | |
| 436 // if asked, start read-eval-print console | |
| 437 if (console) { | |
| 438 processSource(null); | |
| 439 } | |
| 440 } | |
| 441 | |
| 442 protected JSJavaScriptEngine(boolean debug) { | |
| 443 this.debug = debug; | |
| 444 ScriptEngineManager manager = new ScriptEngineManager(); | |
| 445 engine = manager.getEngineByName("javascript"); | |
| 446 if (engine == null) { | |
| 447 throw new RuntimeException("can't load JavaScript engine"); | |
| 448 } | |
| 449 Method[] methods = getClass().getMethods(); | |
| 450 for (int i = 0; i < methods.length; i++) { | |
| 451 Method m = methods[i]; | |
| 452 if (! Modifier.isPublic(m.getModifiers())) { | |
| 453 continue; | |
| 454 } | |
| 455 Class[] argTypes = m.getParameterTypes(); | |
| 456 if (argTypes.length == 1 && | |
| 457 argTypes[0] == Object[].class) { | |
| 458 putFunction(this, m); | |
| 459 } | |
| 460 } | |
| 461 } | |
| 462 | |
| 463 protected JSJavaScriptEngine() { | |
| 464 this(false); | |
| 465 } | |
| 466 | |
| 467 protected abstract ObjectReader getObjectReader(); | |
| 468 protected abstract JSJavaFactory getJSJavaFactory(); | |
| 469 protected void printPrompt(String str) { | |
| 470 System.err.print(str); | |
| 471 System.err.flush(); | |
| 472 } | |
| 473 | |
| 474 protected void loadInitFile() { | |
| 475 InputStream is = JSJavaScriptEngine.class.getResourceAsStream("sa.js"); | |
| 476 BufferedReader reader = new BufferedReader(new InputStreamReader(is)); | |
| 477 evalReader(reader, "sa.js"); | |
| 478 } | |
| 479 | |
| 480 protected void loadUserInitFile() { | |
| 481 File initFile = new File(getUserInitFileDir(), getUserInitFileName()); | |
| 482 if (initFile.exists() && initFile.isFile()) { | |
| 483 // load the init script | |
| 484 processSource(initFile.getAbsolutePath()); | |
| 485 } | |
| 486 } | |
| 487 | |
| 488 protected String getUserInitFileDir() { | |
| 489 return System.getProperty("user.home"); | |
| 490 } | |
| 491 | |
| 492 protected String getUserInitFileName() { | |
| 493 return "jsdb.js"; | |
| 494 } | |
| 495 | |
| 496 protected BufferedReader getInputReader() { | |
| 497 if (inReader == null) { | |
| 498 inReader = new BufferedReader(new InputStreamReader(System.in)); | |
| 499 } | |
| 500 return inReader; | |
| 501 } | |
| 502 | |
| 503 protected PrintStream getOutputStream() { | |
| 504 return System.out; | |
| 505 } | |
| 506 | |
| 507 protected PrintStream getErrorStream() { | |
| 508 return System.err; | |
| 509 } | |
| 510 | |
| 511 protected void print(String name) { | |
| 512 getOutputStream().print(name); | |
| 513 } | |
| 514 | |
| 515 protected void println(String name) { | |
| 516 getOutputStream().println(name); | |
| 517 } | |
| 518 | |
| 519 protected void printError(String message) { | |
| 520 printError(message, null); | |
| 521 } | |
| 522 | |
| 523 protected void printError(String message, Exception exp) { | |
| 524 getErrorStream().println(message); | |
| 525 if (exp != null && debug) { | |
| 526 exp.printStackTrace(getErrorStream()); | |
| 527 } | |
| 528 } | |
| 529 | |
| 530 protected boolean isQuitting() { | |
| 531 return quitting; | |
| 532 } | |
| 533 | |
| 534 protected void quit() { | |
| 535 quitting = true; | |
| 536 } | |
| 537 | |
| 538 protected ScriptEngine getScriptEngine() { | |
| 539 return engine; | |
| 540 } | |
| 541 | |
| 542 private JSJavaThread getOwningThread(JSJavaObject jo) { | |
| 543 Oop oop = jo.getOop(); | |
| 544 Mark mark = oop.getMark(); | |
| 545 ObjectMonitor mon = null; | |
| 546 Address owner = null; | |
| 547 JSJavaThread owningThread = null; | |
| 548 // check for heavyweight monitor | |
| 549 if (! mark.hasMonitor()) { | |
| 550 // check for lightweight monitor | |
| 551 if (mark.hasLocker()) { | |
| 552 owner = mark.locker().getAddress(); // save the address of the Lock word | |
| 553 } | |
| 554 // implied else: no owner | |
| 555 } else { | |
| 556 // this object has a heavyweight monitor | |
| 557 mon = mark.monitor(); | |
| 558 | |
| 559 // The owner field of a heavyweight monitor may be NULL for no | |
| 560 // owner, a JavaThread * or it may still be the address of the | |
| 561 // Lock word in a JavaThread's stack. A monitor can be inflated | |
| 562 // by a non-owning JavaThread, but only the owning JavaThread | |
| 563 // can change the owner field from the Lock word to the | |
| 564 // JavaThread * and it may not have done that yet. | |
| 565 owner = mon.owner(); | |
| 566 } | |
| 567 | |
| 568 // find the owning thread | |
| 569 if (owner != null) { | |
| 570 JSJavaFactory factory = getJSJavaFactory(); | |
| 571 owningThread = (JSJavaThread) factory.newJSJavaThread(VM.getVM().getThreads().owningThreadFromMonitor(owner)); | |
| 572 } | |
| 573 return owningThread; | |
| 574 } | |
| 575 | |
| 576 /** | |
| 577 * Evaluate JavaScript source. | |
| 578 * @param filename the name of the file to compile, or null | |
| 579 * for interactive mode. | |
| 580 */ | |
| 581 private void processSource(String filename) { | |
| 582 if (filename == null) { | |
| 583 BufferedReader in = getInputReader(); | |
| 584 String sourceName = "<stdin>"; | |
| 585 int lineno = 0; | |
| 586 boolean hitEOF = false; | |
| 587 do { | |
| 588 int startline = lineno; | |
| 589 printPrompt("jsdb> "); | |
| 590 Object source = read(EMPTY_ARRAY); | |
| 591 if (source == null) { | |
| 592 hitEOF = true; | |
| 593 break; | |
| 594 } | |
| 595 lineno++; | |
| 596 Object result = evalString(source.toString(), sourceName, startline); | |
| 597 if (result != null) { | |
| 598 printError(result.toString()); | |
| 599 } | |
| 600 if (isQuitting()) { | |
| 601 // The user executed the quit() function. | |
| 602 break; | |
| 603 } | |
| 604 } while (!hitEOF); | |
| 605 } else { | |
| 606 Reader in = null; | |
| 607 try { | |
| 608 in = new BufferedReader(new FileReader(filename)); | |
| 609 evalReader(in, filename); | |
| 610 } catch (FileNotFoundException ex) { | |
| 611 println("File '" + filename + "' not found"); | |
| 612 throw new RuntimeException(ex); | |
| 613 } | |
| 614 } | |
| 615 } | |
| 616 | |
| 617 protected Object evalString(String source, String filename, int lineNum) { | |
| 618 try { | |
| 619 engine.put(ScriptEngine.FILENAME, filename); | |
| 620 return engine.eval(source); | |
| 621 } catch (ScriptException sexp) { | |
| 622 printError(sexp.toString(), sexp); | |
| 623 } catch (Exception exp) { | |
| 624 printError(exp.toString(), exp); | |
| 625 } | |
| 626 return null; | |
| 627 } | |
| 628 | |
| 629 private Object evalReader(Reader in, String filename) { | |
| 630 try { | |
| 631 engine.put(ScriptEngine.FILENAME, filename); | |
| 632 return engine.eval(in); | |
| 633 } catch (ScriptException sexp) { | |
| 634 System.err.println(sexp); | |
| 635 printError(sexp.toString(), sexp); | |
| 636 } finally { | |
| 637 try { | |
| 638 in.close(); | |
| 639 } catch (IOException ioe) { | |
| 640 printError(ioe.toString(), ioe); | |
| 641 } | |
| 642 } | |
| 643 return null; | |
| 644 } | |
| 645 | |
| 646 // lazily initialized input reader | |
| 647 private BufferedReader inReader; | |
| 648 // debug mode or not | |
| 649 protected final boolean debug; | |
| 650 private boolean quitting; | |
| 651 // underlying jsr-223 script engine | |
| 652 private ScriptEngine engine; | |
| 653 } |