| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.services.bytecode.d_BCValidate |
| 4 | |
| 5 | Copyright 1998, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.impl.services.bytecode; |
| 22 | |
| 23 | import java.lang.reflect.*; |
| 24 | import org.apache.derby.iapi.services.classfile.VMOpcode; |
| 25 | import org.apache.derby.iapi.services.sanity.SanityManager; |
| 26 | import java.util.Hashtable; |
| 27 | import org.apache.derby.iapi.services.loader.*; |
| 28 | import org.apache.derby.iapi.services.context.*; |
| 29 | |
| 30 | /** |
| 31 | * Validate BC calls. |
| 32 | * |
| 33 | * @author jamie |
| 34 | */ |
| 35 | class d_BCValidate |
| 36 | { |
| 37 | |
| 38 | private static final String[] csPackages = { |
| 39 | "java", |
| 40 | "org.apache.derby.exe.", |
| 41 | "org.apache.derby.iapi.", |
| 42 | "org.apache.derby.jdbc.", |
| 43 | "org.apache.derby.iapi.", |
| 44 | "org.apache.derby.impl.", |
| 45 | "org.apache.derby.authentication.", |
| 46 | "org.apache.derby.catalog.", |
| 47 | "org.apache.derby.iapi.db.", |
| 48 | "org.apache.derby.iapi.types.", |
| 49 | "org.apache.derby.iapi.types.", |
| 50 | "org.apache.derby.catalog.types.", |
| 51 | }; |
| 52 | |
| 53 | |
| 54 | private static final Class[] NO_PARAMS = new Class[0]; |
| 55 | |
| 56 | static void checkMethod(short opcode, Type dt, String methodName, String[] debugParameterTypes, Type rt) { |
| 57 | |
| 58 | |
| 59 | if (SanityManager.DEBUG) { |
| 60 | String reason = null; |
| 61 | try { |
| 62 | |
| 63 | String declaringClass = dt.javaName(); |
| 64 | if (declaringClass.startsWith("org.apache.derby.exe.")) |
| 65 | return; |
| 66 | |
| 67 | // only validate against Cloudscape engine or Java classes. Not user defined classes |
| 68 | int p; |
| 69 | for (p = 0; p < csPackages.length; p++) { |
| 70 | if (declaringClass.startsWith(csPackages[p])) |
| 71 | break; |
| 72 | } |
| 73 | if (p == csPackages.length) |
| 74 | return; |
| 75 | |
| 76 | Class[] params = NO_PARAMS; |
| 77 | |
| 78 | Class declaring = loadClass(declaringClass); |
| 79 | |
| 80 | if (debugParameterTypes != null) { |
| 81 | params = new Class[debugParameterTypes.length]; |
| 82 | for (int i = 0; i < debugParameterTypes.length; i++) { |
| 83 | params[i] = loadClass(debugParameterTypes[i]); |
| 84 | } |
| 85 | |
| 86 | } |
| 87 | |
| 88 | // If the class is not in the same class loader then it |
| 89 | // it must be a non-Derby class. In that case any method etc. |
| 90 | // being accessed must be public, so don't use the getDeclared |
| 91 | // methods. Default SecurityManager behaviour is to grant access to public members |
| 92 | // and members from classes loaded by the same class loader. Thus |
| 93 | // we try to fall into these categories to avoid having to grant |
| 94 | // permissions to derby jars for the function tests. |
| 95 | |
| 96 | ClassLoader declareLoader = declaring.getClassLoader(); |
| 97 | ClassLoader myLoader = d_BCValidate.class.getClassLoader(); |
| 98 | |
| 99 | boolean sameClassLoader = false; |
| 100 | if (declareLoader == myLoader) |
| 101 | sameClassLoader = true; |
| 102 | else if (declareLoader != null) |
| 103 | sameClassLoader = declareLoader.equals(myLoader); |
| 104 | |
| 105 | String actualReturnType; |
| 106 | |
| 107 | if (methodName.equals("<init>")) { |
| 108 | Constructor c; |
| 109 | |
| 110 | if (sameClassLoader) |
| 111 | { |
| 112 | c = declaring.getDeclaredConstructor(params); |
| 113 | } |
| 114 | else |
| 115 | { |
| 116 | c = declaring.getConstructor(params); |
| 117 | |
| 118 | // check this construct is declared by this |
| 119 | // class, has to be, right? But no harm checking. |
| 120 | if (!c.getDeclaringClass().equals(declaring)) |
| 121 | { |
| 122 | reason = "constructor " + c.toString() + " declared on " + c.getDeclaringClass() + " expected " + declaring; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | actualReturnType = "void"; |
| 127 | } else { |
| 128 | Method m; |
| 129 | |
| 130 | if (sameClassLoader) |
| 131 | { |
| 132 | m = declaring.getDeclaredMethod(methodName, params); |
| 133 | } |
| 134 | else |
| 135 | { |
| 136 | m = declaring.getMethod(methodName, params); |
| 137 | |
| 138 | // check this method is declared by this |
| 139 | // class? But no harm checking. |
| 140 | if (!m.getDeclaringClass().equals(declaring)) |
| 141 | { |
| 142 | reason = "method " + m.toString() + " declared on " + m.getDeclaringClass() + " expected " + declaring; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | actualReturnType = m.getReturnType().getName(); |
| 147 | } |
| 148 | |
| 149 | // do we already have a problem? |
| 150 | if (reason == null) |
| 151 | { |
| 152 | |
| 153 | Class requestedReturnType = loadClass(rt.javaName()); |
| 154 | |
| 155 | // check the return type |
| 156 | if (actualReturnType.equals(requestedReturnType.getName())) { |
| 157 | |
| 158 | // check the inteface match |
| 159 | if (opcode != VMOpcode.INVOKEINTERFACE) |
| 160 | return; |
| 161 | |
| 162 | if (declaring.isInterface()) |
| 163 | return; |
| 164 | |
| 165 | reason = "declaring class is not an interface"; |
| 166 | |
| 167 | } else { |
| 168 | reason = "return type is " + actualReturnType; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | |
| 173 | } catch (Exception e) { |
| 174 | reason = e.toString(); |
| 175 | e.printStackTrace(System.out); |
| 176 | } |
| 177 | |
| 178 | String sig = dt.javaName() + " >> " + rt.javaName() + " " + methodName + "("; |
| 179 | if (debugParameterTypes != null) { |
| 180 | for (int i = 0; i < debugParameterTypes.length; i++) { |
| 181 | if (i != 0) |
| 182 | sig = sig + ", "; |
| 183 | sig = sig + debugParameterTypes[i]; |
| 184 | } |
| 185 | } |
| 186 | sig = sig + ")"; |
| 187 | |
| 188 | String msg = "Invalid method " + sig + " because " + reason; |
| 189 | |
| 190 | System.out.println(msg); |
| 191 | SanityManager.THROWASSERT(msg); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | private static Hashtable primitives; |
| 196 | |
| 197 | static { |
| 198 | if (SanityManager.DEBUG) { |
| 199 | primitives = new Hashtable(); |
| 200 | primitives.put("boolean", Boolean.TYPE); |
| 201 | primitives.put("byte", Byte.TYPE); |
| 202 | primitives.put("char", Character.TYPE); |
| 203 | primitives.put("double", Double.TYPE); |
| 204 | primitives.put("float", Float.TYPE); |
| 205 | primitives.put("int", Integer.TYPE); |
| 206 | primitives.put("long", Long.TYPE); |
| 207 | primitives.put("short", Short.TYPE); |
| 208 | primitives.put("void", Void.TYPE); |
| 209 | } |
| 210 | |
| 211 | } |
| 212 | |
| 213 | |
| 214 | private static Class loadClass(String name) throws ClassNotFoundException { |
| 215 | |
| 216 | if (SanityManager.DEBUG) { |
| 217 | |
| 218 | Class c = (Class) primitives.get(name); |
| 219 | if (c != null) |
| 220 | return c; |
| 221 | |
| 222 | if (name.endsWith("[]")) { |
| 223 | Class baseClass = loadClass(name.substring(0, name.length() - 2)); |
| 224 | return Array.newInstance(baseClass, 0).getClass(); |
| 225 | } |
| 226 | |
| 227 | return Class.forName(name); |
| 228 | } |
| 229 | |
| 230 | return null; |
| 231 | } |
| 232 | } |