2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0.
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 package gov.nasa.jpf.vm;
22 import gov.nasa.jpf.annotation.MJI;
23 import gov.nasa.jpf.vm.ClassPath;
24 import gov.nasa.jpf.vm.ClassInfo;
25 import gov.nasa.jpf.vm.ClassLoaderInfo;
26 import gov.nasa.jpf.vm.ClassInfoException;
27 import gov.nasa.jpf.vm.ClinitRequired;
28 import gov.nasa.jpf.vm.ElementInfo;
29 import gov.nasa.jpf.vm.Heap;
30 import gov.nasa.jpf.vm.MJIEnv;
31 import gov.nasa.jpf.vm.NativePeer;
32 import gov.nasa.jpf.vm.ThreadInfo;
35 * @author Nastaran Shafiei <nastaran.shafiei@gmail.com>
37 * Native peer for java.lang.ClassLoader
39 public class JPF_java_lang_ClassLoader extends NativePeer {
42 public void $init____V (MJIEnv env, int objRef) {
43 ClassLoaderInfo systemCl = ClassLoaderInfo.getCurrentSystemClassLoader();
44 $init__Ljava_lang_ClassLoader_2__V (env, objRef, systemCl.getClassLoaderObjectRef());
48 public void $init__Ljava_lang_ClassLoader_2__V (MJIEnv env, int objRef, int parentRef) {
49 Heap heap = env.getHeap();
51 //--- Retrieve the parent ClassLoaderInfo
52 ClassLoaderInfo parent = env.getClassLoaderInfo(parentRef);
54 //--- create the internal representation of the classloader
55 ClassLoaderInfo cl = new ClassLoaderInfo(env.getVM(), objRef, new ClassPath(), parent);
57 //--- initialize the java.lang.ClassLoader object
58 ElementInfo ei = heap.getModifiable(objRef);
59 ei.setIntField( ClassLoaderInfo.ID_FIELD, cl.getId());
61 // we should use the following block if we ever decide to make systemClassLoader
62 // unavailable if(parent.isSystemClassLoader) {
63 // // we don't want to make the systemCLassLoader available through SUT
64 // parentRef = MJIEnv.NULL;
67 ei.setReferenceField("parent", parentRef);
71 public int getSystemClassLoader____Ljava_lang_ClassLoader_2 (MJIEnv env, int clsObjRef) {
72 return ClassLoaderInfo.getCurrentSystemClassLoader().getClassLoaderObjectRef();
76 public int getResource0__Ljava_lang_String_2__Ljava_lang_String_2 (MJIEnv env, int objRef, int resRef){
77 String rname = env.getStringObject(resRef);
79 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
81 String resourcePath = cl.findResource(rname);
83 return env.newString(resourcePath);
87 public int getResources0__Ljava_lang_String_2___3Ljava_lang_String_2 (MJIEnv env, int objRef, int resRef) {
88 String rname = env.getStringObject(resRef);
90 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
92 String[] resources = cl.findResources(rname);
94 return env.newStringArray(resources);
98 public int findLoadedClass__Ljava_lang_String_2__Ljava_lang_Class_2 (MJIEnv env, int objRef, int nameRef) {
99 String cname = env.getStringObject(nameRef);
101 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
103 ClassInfo ci = cl.getAlreadyResolvedClassInfo(cname);
105 return ci.getClassObjectRef();
112 public int findSystemClass__Ljava_lang_String_2__Ljava_lang_Class_2 (MJIEnv env, int objRef, int nameRef) {
113 String cname = env.getStringObject(nameRef);
115 checkForIllegalName(env, cname);
116 if(env.hasException()) {
120 ClassLoaderInfo cl = ClassLoaderInfo.getCurrentSystemClassLoader();
122 ClassInfo ci = cl.getResolvedClassInfo(cname);
124 if(!ci.isRegistered()) {
125 ci.registerClass(env.getThreadInfo());
128 return ci.getClassObjectRef();
132 public int defineClass0__Ljava_lang_String_2_3BII__Ljava_lang_Class_2
133 (MJIEnv env, int objRef, int nameRef, int bufferRef, int offset, int length) {
134 String cname = env.getStringObject(nameRef);
135 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
137 // determine whether that the corresponding class is already defined by this
138 // classloader, if so, this attempt is invalid, and loading throws a LinkageError
139 if (cl.getDefinedClassInfo(cname) != null) { // attempt to define twice
140 env.throwException("java.lang.LinkageError");
144 byte[] buffer = env.getByteArrayObject(bufferRef);
147 ClassInfo ci = cl.getResolvedClassInfo( cname, buffer, offset, length);
149 // Note: if the representation is not of a supported major or minor version, loading
150 // throws an UnsupportedClassVersionError. But for now, we do not check for this here
151 // since we don't do much with minor and major versions
153 ThreadInfo ti = env.getThreadInfo();
154 ci.registerClass(ti);
156 return ci.getClassObjectRef();
158 } catch (ClassInfoException cix){
159 env.throwException("java.lang.ClassFormatError");
165 protected static boolean check(MJIEnv env, String cname, byte[] buffer, int offset, int length) {
166 // throw SecurityExcpetion if the package prefix is java
167 checkForProhibitedPkg(env, cname);
169 // throw NoClassDefFoundError if the given class does name might
170 // not be a valid binary name
171 checkForIllegalName(env, cname);
173 // throw IndexOutOfBoundsException if buffer length is not consistent
175 checkData(env, buffer, offset, length);
177 return !env.hasException();
180 protected static void checkForProhibitedPkg(MJIEnv env, String name) {
181 if(name != null && name.startsWith("java.")) {
182 env.throwException("java.lang.SecurityException", "Prohibited package name: " + name);
186 protected static void checkForIllegalName(MJIEnv env, String name) {
187 if((name == null) || (name.length() == 0)) {
191 if((name.indexOf('/') != -1) || (name.charAt(0) == '[')) {
192 env.throwException("java.lang.NoClassDefFoundError", "IllegalName: " + name);
196 protected static void checkData(MJIEnv env, byte[] buffer, int offset, int length) {
197 if(offset<0 || length<0 || offset+length > buffer.length) {
198 env.throwException("java.lang.IndexOutOfBoundsException");
202 static String pkg_class_name = "java.lang.Package";
205 public int getPackages_____3Ljava_lang_Package_2 (MJIEnv env, int objRef) {
206 ClassLoaderInfo sysLoader = ClassLoaderInfo.getCurrentSystemClassLoader();
207 ClassInfo pkgClass = null;
209 pkgClass = sysLoader.getInitializedClassInfo(pkg_class_name, env.getThreadInfo());
210 } catch (ClinitRequired x){
211 env.handleClinitRequest(x.getRequiredClassInfo());
215 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
216 // Returns all of the Packages defined by this class loader and its ancestors
217 Map<String, ClassLoaderInfo> pkgs = cl.getPackages();
218 int size = pkgs.size();
219 // create an array of type java.lang.Package
220 int pkgArr = env.newObjectArray(pkg_class_name, size);
223 for(String name: cl.getPackages().keySet()) {
224 int pkgRef = createPackageObject(env, pkgClass, name, cl);
225 // place the object into the array
226 env.setReferenceArrayElement(pkgArr, i++, pkgRef);
233 public int getPackage__Ljava_lang_String_2__Ljava_lang_Package_2 (MJIEnv env, int objRef, int nameRef) {
234 ClassLoaderInfo sysLoader = ClassLoaderInfo.getCurrentSystemClassLoader();
236 ClassInfo pkgClass = null;
238 pkgClass = sysLoader.getInitializedClassInfo(pkg_class_name, env.getThreadInfo());
239 } catch (ClinitRequired x){
240 env.handleClinitRequest(x.getRequiredClassInfo());
244 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
245 String pkgName = env.getStringObject(nameRef);
246 if(cl.getPackages().get(pkgName)!=null) {
247 return createPackageObject(env, pkgClass, pkgName, cl);
253 public static int createPackageObject(MJIEnv env, ClassInfo pkgClass, String pkgName, ClassLoaderInfo cl) {
254 int pkgRef = env.newObject(pkgClass);
255 ElementInfo ei = env.getModifiableElementInfo(pkgRef);
257 ei.setReferenceField("pkgName", env.newString(pkgName));
258 ei.setReferenceField("loader", cl.getClassLoaderObjectRef());
259 // the rest of the fields set to some dummy value
260 ei.setReferenceField("specTitle", env.newString("spectitle"));
261 ei.setReferenceField("specVersion", env.newString("specversion"));
262 ei.setReferenceField("specVendor", env.newString("specvendor"));
263 ei.setReferenceField("implTitle", env.newString("impltitle"));
264 ei.setReferenceField("implVersion", env.newString("implversion"));
265 ei.setReferenceField("sealBase", MJIEnv.NULL);
271 public void setDefaultAssertionStatus__Z__V (MJIEnv env, int objRef, boolean enabled) {
272 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
273 cl.setDefaultAssertionStatus(enabled);
277 public void setPackageAssertionStatus__Ljava_lang_String_2Z__V (MJIEnv env, int objRef, int strRef, boolean enabled) {
278 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
279 String pkgName = env.getStringObject(strRef);
280 cl.setPackageAssertionStatus(pkgName, enabled);
284 public void setClassAssertionStatus__Ljava_lang_String_2Z__V (MJIEnv env, int objRef, int strRef, boolean enabled) {
285 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
286 String clsName = env.getStringObject(strRef);
287 cl.setClassAssertionStatus(clsName, enabled);
291 public void clearAssertionStatus____V (MJIEnv env, int objRef) {
292 ClassLoaderInfo cl = env.getClassLoaderInfo(objRef);
293 cl.clearAssertionStatus();