Source Code Cross Referenced for MethodCallVisitor.java in  » Net » Terracotta » com » tc » aspectwerkz » transform » inlining » weaver » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » Terracotta » com.tc.aspectwerkz.transform.inlining.weaver 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * All content copyright (c) 2003-2006 Terracotta, Inc., except as may otherwise be noted in a separate copyright notice.  All rights reserved.
003:         */
004:        package com.tc.aspectwerkz.transform.inlining.weaver;
005:
006:        import com.tc.asm.ClassAdapter;
007:        import com.tc.asm.ClassVisitor;
008:        import com.tc.asm.MethodVisitor;
009:        import com.tc.asm.Label;
010:
011:        import com.tc.aspectwerkz.definition.SystemDefinition;
012:        import com.tc.aspectwerkz.joinpoint.management.JoinPointType;
013:        import com.tc.aspectwerkz.reflect.impl.asm.AsmClassInfo;
014:        import com.tc.aspectwerkz.reflect.ClassInfo;
015:        import com.tc.aspectwerkz.reflect.MemberInfo;
016:        import com.tc.aspectwerkz.reflect.ClassInfoHelper;
017:        import com.tc.aspectwerkz.reflect.MethodInfo;
018:        import com.tc.aspectwerkz.transform.InstrumentationContext;
019:        import com.tc.aspectwerkz.transform.TransformationConstants;
020:        import com.tc.aspectwerkz.transform.TransformationUtil;
021:        import com.tc.aspectwerkz.transform.inlining.AsmHelper;
022:        import com.tc.aspectwerkz.transform.inlining.EmittedJoinPoint;
023:        import com.tc.aspectwerkz.expression.ExpressionContext;
024:        import com.tc.aspectwerkz.expression.PointcutType;
025:
026:        import java.lang.reflect.Modifier;
027:        import java.util.Iterator;
028:        import java.util.Set;
029:
030:        /**
031:         * Instruments method CALL join points by replacing INVOKEXXX instructions with invocations of the compiled join point.
032:         * <br/>
033:         * It calls the JPClass.invoke static method. The signature of the invoke method depends if the
034:         * target method is static or not as follow:
035:         * <pre>
036:         *      invoke(callee, args.., caller) // non static
037:         *      invoke(args.., caller) // static
038:         * </pre>
039:         * (The reason why is that it simplifies call pointcut stack management)
040:         *
041:         * @author <a href="mailto:jboner@codehaus.org">Jonas BonŽr </a>
042:         * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
043:         */
044:        public class MethodCallVisitor extends ClassAdapter implements 
045:                TransformationConstants {
046:
047:            private final InstrumentationContext m_ctx;
048:            private final ClassLoader m_loader;
049:            private final ClassInfo m_callerClassInfo;
050:
051:            private Label m_lastLabelForLineNumber = EmittedJoinPoint.NO_LINE_NUMBER;
052:
053:            /**
054:             * Creates a new instance.
055:             *
056:             * @param cv
057:             * @param loader
058:             * @param classInfo
059:             * @param ctx
060:             */
061:            public MethodCallVisitor(final ClassVisitor cv,
062:                    final ClassLoader loader, final ClassInfo classInfo,
063:                    final InstrumentationContext ctx) {
064:                super (cv);
065:                m_loader = loader;
066:                m_callerClassInfo = classInfo;
067:                m_ctx = ctx;
068:            }
069:
070:            /**
071:             * Visits the caller methods.
072:             *
073:             * @param access
074:             * @param name
075:             * @param desc
076:             * @param signature
077:             * @param exceptions
078:             * @return
079:             */
080:            public MethodVisitor visitMethod(final int access,
081:                    final String name, final String desc,
082:                    final String signature, final String[] exceptions) {
083:
084:                if (name.startsWith(WRAPPER_METHOD_PREFIX)
085:                        || Modifier.isNative(access)
086:                        || Modifier.isAbstract(access)) {
087:                    return super .visitMethod(access, name, desc, signature,
088:                            exceptions);
089:                }
090:
091:                MethodVisitor mv = cv.visitMethod(access, name, desc,
092:                        signature, exceptions);
093:                return mv == null ? null
094:                        : new ReplaceInvokeInstructionCodeAdapter(mv, m_loader,
095:                                m_callerClassInfo, m_ctx.getClassName(), name,
096:                                desc);
097:            }
098:
099:            /**
100:             * Replaces 'INVOKEXXX' instructions with a call to the compiled JoinPoint instance.
101:             *
102:             * @author <a href="mailto:jboner@codehaus.org">Jonas Bonér </a>
103:             * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
104:             */
105:            public class ReplaceInvokeInstructionCodeAdapter extends
106:                    AfterObjectInitializationCodeAdapter {
107:
108:                private final ClassLoader m_loader;
109:                private final ClassInfo m_callerClassInfo;
110:                private final String m_callerClassName;
111:                private final String m_callerMethodName;
112:                private final String m_callerMethodDesc;
113:                private final MemberInfo m_callerMemberInfo;
114:
115:                /**
116:                 * Creates a new instance.
117:                 *
118:                 * @param ca
119:                 * @param loader
120:                 * @param callerClassInfo
121:                 * @param callerClassName
122:                 * @param callerMethodName
123:                 * @param callerMethodDesc
124:                 */
125:                public ReplaceInvokeInstructionCodeAdapter(
126:                        final MethodVisitor ca, final ClassLoader loader,
127:                        final ClassInfo callerClassInfo,
128:                        final String callerClassName,
129:                        final String callerMethodName,
130:                        final String callerMethodDesc) {
131:                    super (ca, callerMethodName);
132:                    m_loader = loader;
133:                    m_callerClassInfo = callerClassInfo;
134:                    m_callerClassName = callerClassName;
135:                    m_callerMethodName = callerMethodName;
136:                    m_callerMethodDesc = callerMethodDesc;
137:
138:                    if (CLINIT_METHOD_NAME.equals(callerMethodName)) {
139:                        m_callerMemberInfo = m_callerClassInfo
140:                                .staticInitializer();
141:                    } else if (INIT_METHOD_NAME.equals(callerMethodName)) {
142:                        int hash = AsmHelper
143:                                .calculateConstructorHash(m_callerMethodDesc);
144:                        m_callerMemberInfo = m_callerClassInfo
145:                                .getConstructor(hash);
146:                    } else {
147:                        int hash = AsmHelper.calculateMethodHash(
148:                                m_callerMethodName, m_callerMethodDesc);
149:                        m_callerMemberInfo = m_callerClassInfo.getMethod(hash);
150:                    }
151:                }
152:
153:                /**
154:                 * Label
155:                 *
156:                 * @param label
157:                 */
158:                public void visitLabel(Label label) {
159:                    m_lastLabelForLineNumber = label;
160:                    super .visitLabel(label);
161:                }
162:
163:                /**
164:                 * Visits 'INVOKEXXX' instructions.
165:                 *
166:                 * @param opcode
167:                 * @param calleeClassName
168:                 * @param calleeMethodName
169:                 * @param calleeMethodDesc
170:                 */
171:                public void visitMethodInsn(final int opcode,
172:                        String calleeClassName, final String calleeMethodName,
173:                        final String calleeMethodDesc) {
174:
175:                    if (m_callerMemberInfo == null) {
176:                        System.err
177:                                .println("AW::WARNING "
178:                                        + "metadata structure could not be build for method ["
179:                                        + m_callerClassInfo.getName().replace(
180:                                                '/', '.') + '.'
181:                                        + m_callerMethodName + ':'
182:                                        + m_callerMethodDesc + ']');
183:                        super .visitMethodInsn(opcode, calleeClassName,
184:                                calleeMethodName, calleeMethodDesc);
185:                        return;
186:                    }
187:
188:                    if (INIT_METHOD_NAME.equals(calleeMethodName)
189:                            || CLINIT_METHOD_NAME.equals(calleeMethodName)
190:                            || calleeMethodName.startsWith(ASPECTWERKZ_PREFIX)
191:                            || calleeClassName
192:                                    .endsWith(JOIN_POINT_CLASS_SUFFIX)) {
193:                        super .visitMethodInsn(opcode, calleeClassName,
194:                                calleeMethodName, calleeMethodDesc);
195:                        return;
196:                    }
197:
198:                    // check if we have a super.sameMethod() call
199:                    if (opcode == INVOKESPECIAL
200:                            && !calleeClassName.equals(m_callerClassName)
201:                            && ClassInfoHelper.extendsSuperClass(
202:                                    m_callerClassInfo, calleeClassName.replace(
203:                                            '/', '.'))) {
204:                        super .visitMethodInsn(opcode, calleeClassName,
205:                                calleeMethodName, calleeMethodDesc);
206:                        return;
207:                    }
208:
209:                    // check if object initialization has been reached
210:                    if (!m_isObjectInitialized) {
211:                        super .visitMethodInsn(opcode, calleeClassName,
212:                                calleeMethodName, calleeMethodDesc);
213:                        return;
214:                    }
215:
216:                    int joinPointHash = AsmHelper.calculateMethodHash(
217:                            calleeMethodName, calleeMethodDesc);
218:
219:                    ClassInfo classInfo = AsmClassInfo.getClassInfo(
220:                            calleeClassName, m_loader);
221:                    MethodInfo calleeMethodInfo = classInfo
222:                            .getMethod(joinPointHash);
223:
224:                    if (calleeMethodInfo == null) {
225:                        System.err
226:                                .println("AW::WARNING "
227:                                        + "metadata structure could not be build for method ["
228:                                        + classInfo.getName().replace('/', '.')
229:                                        + '.' + calleeMethodName + ':'
230:                                        + calleeMethodDesc
231:                                        + "] when parsing method ["
232:                                        + m_callerClassInfo.getName() + '.'
233:                                        + m_callerMethodName + "(..)]");
234:                        // bail out
235:                        super .visitMethodInsn(opcode, calleeClassName,
236:                                calleeMethodName, calleeMethodDesc);
237:                        return;
238:                    }
239:
240:                    ExpressionContext ctx = new ExpressionContext(
241:                            PointcutType.CALL, calleeMethodInfo,
242:                            m_callerMemberInfo);
243:
244:                    if (methodFilter(m_ctx.getDefinitions(), ctx,
245:                            calleeMethodInfo)) {
246:                        super .visitMethodInsn(opcode, calleeClassName,
247:                                calleeMethodName, calleeMethodDesc);
248:                    } else {
249:                        m_ctx.markAsAdvised();
250:
251:                        String joinPointClassName = TransformationUtil
252:                                .getJoinPointClassName(m_callerClassName,
253:                                        m_callerMethodName, m_callerMethodDesc,
254:                                        calleeClassName,
255:                                        JoinPointType.METHOD_CALL_INT,
256:                                        joinPointHash);
257:
258:                        // load the caller instance (this), or null if in a static context
259:                        // note that callee instance [optional] and args are already on the stack
260:                        if (Modifier
261:                                .isStatic(m_callerMemberInfo.getModifiers())) {
262:                            visitInsn(ACONST_NULL);
263:                        } else {
264:                            visitVarInsn(ALOAD, 0);
265:                        }
266:
267:                        // add the call to the join point
268:                        super 
269:                                .visitMethodInsn(
270:                                        INVOKESTATIC,
271:                                        joinPointClassName,
272:                                        INVOKE_METHOD_NAME,
273:                                        TransformationUtil
274:                                                .getInvokeSignatureForCodeJoinPoints(
275:                                                        calleeMethodInfo
276:                                                                .getModifiers(),
277:                                                        calleeMethodDesc,
278:                                                        m_callerClassName,
279:                                                        calleeClassName));
280:
281:                        // emit the joinpoint
282:                        //See AW-253 - we remember if we had an INVOKE INTERFACE opcode
283:                        int modifiers = calleeMethodInfo.getModifiers();
284:                        if (opcode == INVOKEINTERFACE) {
285:                            modifiers = modifiers | MODIFIER_INVOKEINTERFACE;
286:                        }
287:                        m_ctx.addEmittedJoinPoint(new EmittedJoinPoint(
288:                                JoinPointType.METHOD_CALL_INT,
289:                                m_callerClassName, m_callerMethodName,
290:                                m_callerMethodDesc, m_callerMemberInfo
291:                                        .getModifiers(), calleeClassName,
292:                                calleeMethodName, calleeMethodDesc, modifiers,
293:                                joinPointHash, joinPointClassName,
294:                                m_lastLabelForLineNumber));
295:                    }
296:                }
297:
298:                /**
299:                 * Filters out the methods that are not eligible for transformation.
300:                 * Do not filter on abstract callee method - needed for interface declared method call
301:                 * (invokeinterface instr.)
302:                 *
303:                 * @param definitions
304:                 * @param ctx
305:                 * @param calleeMethodInfo
306:                 * @return boolean true if the method should be filtered out
307:                 */
308:                public boolean methodFilter(final Set definitions,
309:                        final ExpressionContext ctx,
310:                        final MethodInfo calleeMethodInfo) {
311:                    if (calleeMethodInfo.getName().equals(INIT_METHOD_NAME)
312:                            || calleeMethodInfo.getName().equals(
313:                                    CLINIT_METHOD_NAME)
314:                            || calleeMethodInfo.getName().startsWith(
315:                                    ORIGINAL_METHOD_PREFIX)) {
316:                        return true;
317:                    }
318:                    for (Iterator it = definitions.iterator(); it.hasNext();) {
319:                        if (((SystemDefinition) it.next()).hasPointcut(ctx)) {
320:                            return false;
321:                        } else {
322:                            continue;
323:                        }
324:                    }
325:                    return true;
326:                }
327:            }
328:        }
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