Thu, 12 Jan 2012 15:28:34 +0000
7123100: javac fails with java.lang.StackOverflowError
Summary: Inference of under-constrained type-variables creates erroneous recursive wildcard types
Reviewed-by: jjg
duke@1 | 1 | /* |
jjg@912 | 2 | * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javadoc; |
duke@1 | 27 | |
duke@1 | 28 | import com.sun.javadoc.*; |
duke@1 | 29 | |
duke@1 | 30 | import static com.sun.javadoc.LanguageVersion.*; |
duke@1 | 31 | |
duke@1 | 32 | import com.sun.tools.javac.util.List; |
duke@1 | 33 | |
jjg@912 | 34 | import java.io.File; |
duke@1 | 35 | import java.lang.reflect.Method; |
duke@1 | 36 | import java.lang.reflect.Modifier; |
duke@1 | 37 | import java.lang.reflect.InvocationTargetException; |
jjg@912 | 38 | import java.net.URL; |
jjg@912 | 39 | import java.net.URLClassLoader; |
duke@1 | 40 | |
duke@1 | 41 | |
duke@1 | 42 | /** |
duke@1 | 43 | * Class creates, controls and invokes doclets. |
duke@1 | 44 | * @author Neal Gafter (rewrite) |
duke@1 | 45 | */ |
duke@1 | 46 | public class DocletInvoker { |
duke@1 | 47 | |
jjg@74 | 48 | private final Class<?> docletClass; |
duke@1 | 49 | |
duke@1 | 50 | private final String docletClassName; |
duke@1 | 51 | |
duke@1 | 52 | private final ClassLoader appClassLoader; |
duke@1 | 53 | |
duke@1 | 54 | private final Messager messager; |
duke@1 | 55 | |
duke@1 | 56 | private static class DocletInvokeException extends Exception { |
duke@1 | 57 | private static final long serialVersionUID = 0; |
duke@1 | 58 | } |
duke@1 | 59 | |
duke@1 | 60 | private String appendPath(String path1, String path2) { |
duke@1 | 61 | if (path1 == null || path1.length() == 0) { |
duke@1 | 62 | return path2 == null ? "." : path2; |
duke@1 | 63 | } else if (path2 == null || path2.length() == 0) { |
duke@1 | 64 | return path1; |
duke@1 | 65 | } else { |
duke@1 | 66 | return path1 + File.pathSeparator + path2; |
duke@1 | 67 | } |
duke@1 | 68 | } |
duke@1 | 69 | |
duke@1 | 70 | public DocletInvoker(Messager messager, |
jjg@129 | 71 | String docletClassName, String docletPath, |
jjg@129 | 72 | ClassLoader docletParentClassLoader) { |
duke@1 | 73 | this.messager = messager; |
duke@1 | 74 | this.docletClassName = docletClassName; |
duke@1 | 75 | |
duke@1 | 76 | // construct class loader |
duke@1 | 77 | String cpString = null; // make sure env.class.path defaults to dot |
duke@1 | 78 | |
duke@1 | 79 | // do prepends to get correct ordering |
duke@1 | 80 | cpString = appendPath(System.getProperty("env.class.path"), cpString); |
duke@1 | 81 | cpString = appendPath(System.getProperty("java.class.path"), cpString); |
duke@1 | 82 | cpString = appendPath(docletPath, cpString); |
jjg@1116 | 83 | URL[] urls = com.sun.tools.javac.file.Locations.pathToURLs(cpString); |
jjg@129 | 84 | if (docletParentClassLoader == null) |
jjg@209 | 85 | appClassLoader = new URLClassLoader(urls, getDelegationClassLoader(docletClassName)); |
jjg@129 | 86 | else |
jjg@129 | 87 | appClassLoader = new URLClassLoader(urls, docletParentClassLoader); |
duke@1 | 88 | |
duke@1 | 89 | // attempt to find doclet |
mcimadamore@184 | 90 | Class<?> dc = null; |
duke@1 | 91 | try { |
duke@1 | 92 | dc = appClassLoader.loadClass(docletClassName); |
duke@1 | 93 | } catch (ClassNotFoundException exc) { |
duke@1 | 94 | messager.error(null, "main.doclet_class_not_found", docletClassName); |
duke@1 | 95 | messager.exit(); |
duke@1 | 96 | } |
duke@1 | 97 | docletClass = dc; |
duke@1 | 98 | } |
duke@1 | 99 | |
jjg@209 | 100 | /* |
jjg@209 | 101 | * Returns the delegation class loader to use when creating |
jjg@209 | 102 | * appClassLoader (used to load the doclet). The context class |
jjg@209 | 103 | * loader is the best choice, but legacy behavior was to use the |
jjg@209 | 104 | * default delegation class loader (aka system class loader). |
jjg@209 | 105 | * |
jjg@209 | 106 | * Here we favor using the context class loader. To ensure |
jjg@209 | 107 | * compatibility with existing apps, we revert to legacy |
jjg@209 | 108 | * behavior if either or both of the following conditions hold: |
jjg@209 | 109 | * |
jjg@209 | 110 | * 1) the doclet is loadable from the system class loader but not |
jjg@209 | 111 | * from the context class loader, |
jjg@209 | 112 | * |
jjg@209 | 113 | * 2) this.getClass() is loadable from the system class loader but not |
jjg@209 | 114 | * from the context class loader. |
jjg@209 | 115 | */ |
jjg@209 | 116 | private ClassLoader getDelegationClassLoader(String docletClassName) { |
jjg@209 | 117 | ClassLoader ctxCL = Thread.currentThread().getContextClassLoader(); |
jjg@209 | 118 | ClassLoader sysCL = ClassLoader.getSystemClassLoader(); |
jjg@209 | 119 | if (sysCL == null) |
jjg@209 | 120 | return ctxCL; |
jjg@209 | 121 | if (ctxCL == null) |
jjg@209 | 122 | return sysCL; |
jjg@209 | 123 | |
jjg@209 | 124 | // Condition 1. |
jjg@209 | 125 | try { |
jjg@209 | 126 | sysCL.loadClass(docletClassName); |
jjg@209 | 127 | try { |
jjg@209 | 128 | ctxCL.loadClass(docletClassName); |
jjg@209 | 129 | } catch (ClassNotFoundException e) { |
jjg@209 | 130 | return sysCL; |
jjg@209 | 131 | } |
jjg@209 | 132 | } catch (ClassNotFoundException e) { |
jjg@209 | 133 | } |
jjg@209 | 134 | |
jjg@209 | 135 | // Condition 2. |
jjg@209 | 136 | try { |
jjg@209 | 137 | if (getClass() == sysCL.loadClass(getClass().getName())) { |
jjg@209 | 138 | try { |
jjg@209 | 139 | if (getClass() != ctxCL.loadClass(getClass().getName())) |
jjg@209 | 140 | return sysCL; |
jjg@209 | 141 | } catch (ClassNotFoundException e) { |
jjg@209 | 142 | return sysCL; |
jjg@209 | 143 | } |
jjg@209 | 144 | } |
jjg@209 | 145 | } catch (ClassNotFoundException e) { |
jjg@209 | 146 | } |
jjg@209 | 147 | |
jjg@209 | 148 | return ctxCL; |
jjg@209 | 149 | } |
jjg@209 | 150 | |
duke@1 | 151 | /** |
duke@1 | 152 | * Generate documentation here. Return true on success. |
duke@1 | 153 | */ |
duke@1 | 154 | public boolean start(RootDoc root) { |
duke@1 | 155 | Object retVal; |
duke@1 | 156 | String methodName = "start"; |
jjg@584 | 157 | Class<?>[] paramTypes = { RootDoc.class }; |
jjg@584 | 158 | Object[] params = { root }; |
duke@1 | 159 | try { |
duke@1 | 160 | retVal = invoke(methodName, null, paramTypes, params); |
duke@1 | 161 | } catch (DocletInvokeException exc) { |
duke@1 | 162 | return false; |
duke@1 | 163 | } |
duke@1 | 164 | if (retVal instanceof Boolean) { |
duke@1 | 165 | return ((Boolean)retVal).booleanValue(); |
duke@1 | 166 | } else { |
duke@1 | 167 | messager.error(null, "main.must_return_boolean", |
duke@1 | 168 | docletClassName, methodName); |
duke@1 | 169 | return false; |
duke@1 | 170 | } |
duke@1 | 171 | } |
duke@1 | 172 | |
duke@1 | 173 | /** |
duke@1 | 174 | * Check for doclet added options here. Zero return means |
duke@1 | 175 | * option not known. Positive value indicates number of |
duke@1 | 176 | * arguments to option. Negative value means error occurred. |
duke@1 | 177 | */ |
duke@1 | 178 | public int optionLength(String option) { |
duke@1 | 179 | Object retVal; |
duke@1 | 180 | String methodName = "optionLength"; |
jjg@584 | 181 | Class<?>[] paramTypes = { String.class }; |
jjg@584 | 182 | Object[] params = { option }; |
duke@1 | 183 | try { |
duke@1 | 184 | retVal = invoke(methodName, new Integer(0), paramTypes, params); |
duke@1 | 185 | } catch (DocletInvokeException exc) { |
duke@1 | 186 | return -1; |
duke@1 | 187 | } |
duke@1 | 188 | if (retVal instanceof Integer) { |
duke@1 | 189 | return ((Integer)retVal).intValue(); |
duke@1 | 190 | } else { |
duke@1 | 191 | messager.error(null, "main.must_return_int", |
duke@1 | 192 | docletClassName, methodName); |
duke@1 | 193 | return -1; |
duke@1 | 194 | } |
duke@1 | 195 | } |
duke@1 | 196 | |
duke@1 | 197 | /** |
duke@1 | 198 | * Let doclet check that all options are OK. Returning true means |
duke@1 | 199 | * options are OK. If method does not exist, assume true. |
duke@1 | 200 | */ |
duke@1 | 201 | public boolean validOptions(List<String[]> optlist) { |
duke@1 | 202 | Object retVal; |
duke@1 | 203 | String options[][] = optlist.toArray(new String[optlist.length()][]); |
duke@1 | 204 | String methodName = "validOptions"; |
duke@1 | 205 | DocErrorReporter reporter = messager; |
jjg@584 | 206 | Class<?>[] paramTypes = { String[][].class, DocErrorReporter.class }; |
jjg@584 | 207 | Object[] params = { options, reporter }; |
duke@1 | 208 | try { |
duke@1 | 209 | retVal = invoke(methodName, Boolean.TRUE, paramTypes, params); |
duke@1 | 210 | } catch (DocletInvokeException exc) { |
duke@1 | 211 | return false; |
duke@1 | 212 | } |
duke@1 | 213 | if (retVal instanceof Boolean) { |
duke@1 | 214 | return ((Boolean)retVal).booleanValue(); |
duke@1 | 215 | } else { |
duke@1 | 216 | messager.error(null, "main.must_return_boolean", |
duke@1 | 217 | docletClassName, methodName); |
duke@1 | 218 | return false; |
duke@1 | 219 | } |
duke@1 | 220 | } |
duke@1 | 221 | |
duke@1 | 222 | /** |
duke@1 | 223 | * Return the language version supported by this doclet. |
duke@1 | 224 | * If the method does not exist in the doclet, assume version 1.1. |
duke@1 | 225 | */ |
duke@1 | 226 | public LanguageVersion languageVersion() { |
duke@1 | 227 | try { |
duke@1 | 228 | Object retVal; |
duke@1 | 229 | String methodName = "languageVersion"; |
mcimadamore@184 | 230 | Class<?>[] paramTypes = new Class<?>[0]; |
duke@1 | 231 | Object[] params = new Object[0]; |
duke@1 | 232 | try { |
duke@1 | 233 | retVal = invoke(methodName, JAVA_1_1, paramTypes, params); |
duke@1 | 234 | } catch (DocletInvokeException exc) { |
duke@1 | 235 | return JAVA_1_1; |
duke@1 | 236 | } |
duke@1 | 237 | if (retVal instanceof LanguageVersion) { |
duke@1 | 238 | return (LanguageVersion)retVal; |
duke@1 | 239 | } else { |
duke@1 | 240 | messager.error(null, "main.must_return_languageversion", |
duke@1 | 241 | docletClassName, methodName); |
duke@1 | 242 | return JAVA_1_1; |
duke@1 | 243 | } |
duke@1 | 244 | } catch (NoClassDefFoundError ex) { // for boostrapping, no Enum class. |
duke@1 | 245 | return null; |
duke@1 | 246 | } |
duke@1 | 247 | } |
duke@1 | 248 | |
duke@1 | 249 | /** |
duke@1 | 250 | * Utility method for calling doclet functionality |
duke@1 | 251 | */ |
duke@1 | 252 | private Object invoke(String methodName, Object returnValueIfNonExistent, |
mcimadamore@184 | 253 | Class<?>[] paramTypes, Object[] params) |
duke@1 | 254 | throws DocletInvokeException { |
duke@1 | 255 | Method meth; |
duke@1 | 256 | try { |
duke@1 | 257 | meth = docletClass.getMethod(methodName, paramTypes); |
duke@1 | 258 | } catch (NoSuchMethodException exc) { |
duke@1 | 259 | if (returnValueIfNonExistent == null) { |
duke@1 | 260 | messager.error(null, "main.doclet_method_not_found", |
duke@1 | 261 | docletClassName, methodName); |
duke@1 | 262 | throw new DocletInvokeException(); |
duke@1 | 263 | } else { |
duke@1 | 264 | return returnValueIfNonExistent; |
duke@1 | 265 | } |
duke@1 | 266 | } catch (SecurityException exc) { |
duke@1 | 267 | messager.error(null, "main.doclet_method_not_accessible", |
duke@1 | 268 | docletClassName, methodName); |
duke@1 | 269 | throw new DocletInvokeException(); |
duke@1 | 270 | } |
duke@1 | 271 | if (!Modifier.isStatic(meth.getModifiers())) { |
duke@1 | 272 | messager.error(null, "main.doclet_method_must_be_static", |
duke@1 | 273 | docletClassName, methodName); |
duke@1 | 274 | throw new DocletInvokeException(); |
duke@1 | 275 | } |
jjg@209 | 276 | ClassLoader savedCCL = |
jjg@209 | 277 | Thread.currentThread().getContextClassLoader(); |
duke@1 | 278 | try { |
duke@1 | 279 | Thread.currentThread().setContextClassLoader(appClassLoader); |
duke@1 | 280 | return meth.invoke(null , params); |
duke@1 | 281 | } catch (IllegalArgumentException exc) { |
duke@1 | 282 | messager.error(null, "main.internal_error_exception_thrown", |
duke@1 | 283 | docletClassName, methodName, exc.toString()); |
duke@1 | 284 | throw new DocletInvokeException(); |
duke@1 | 285 | } catch (IllegalAccessException exc) { |
duke@1 | 286 | messager.error(null, "main.doclet_method_not_accessible", |
duke@1 | 287 | docletClassName, methodName); |
duke@1 | 288 | throw new DocletInvokeException(); |
duke@1 | 289 | } catch (NullPointerException exc) { |
duke@1 | 290 | messager.error(null, "main.internal_error_exception_thrown", |
duke@1 | 291 | docletClassName, methodName, exc.toString()); |
duke@1 | 292 | throw new DocletInvokeException(); |
duke@1 | 293 | } catch (InvocationTargetException exc) { |
duke@1 | 294 | Throwable err = exc.getTargetException(); |
duke@1 | 295 | if (err instanceof java.lang.OutOfMemoryError) { |
duke@1 | 296 | messager.error(null, "main.out.of.memory"); |
duke@1 | 297 | } else { |
duke@1 | 298 | messager.error(null, "main.exception_thrown", |
duke@1 | 299 | docletClassName, methodName, exc.toString()); |
duke@1 | 300 | exc.getTargetException().printStackTrace(); |
duke@1 | 301 | } |
duke@1 | 302 | throw new DocletInvokeException(); |
jjg@209 | 303 | } finally { |
jjg@209 | 304 | Thread.currentThread().setContextClassLoader(savedCCL); |
duke@1 | 305 | } |
duke@1 | 306 | } |
duke@1 | 307 | } |