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The AspectJ weaver introduces advices to java classes
/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* PARC initial implementation
* Alexandre Vasseur support for @AJ aspects
* ******************************************************************/
package org.aspectj.weaver.bcel;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.ConstantPool;
import org.aspectj.apache.bcel.classfile.Field;
import org.aspectj.apache.bcel.generic.ArrayType;
import org.aspectj.apache.bcel.generic.FieldInstruction;
import org.aspectj.apache.bcel.generic.INVOKEINTERFACE;
import org.aspectj.apache.bcel.generic.Instruction;
import org.aspectj.apache.bcel.generic.InstructionBranch;
import org.aspectj.apache.bcel.generic.InstructionConstants;
import org.aspectj.apache.bcel.generic.InstructionFactory;
import org.aspectj.apache.bcel.generic.InstructionHandle;
import org.aspectj.apache.bcel.generic.InstructionLV;
import org.aspectj.apache.bcel.generic.InstructionList;
import org.aspectj.apache.bcel.generic.InstructionTargeter;
import org.aspectj.apache.bcel.generic.InvokeInstruction;
import org.aspectj.apache.bcel.generic.LineNumberTag;
import org.aspectj.apache.bcel.generic.LocalVariableTag;
import org.aspectj.apache.bcel.generic.MULTIANEWARRAY;
import org.aspectj.apache.bcel.generic.ObjectType;
import org.aspectj.apache.bcel.generic.TargetLostException;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.weaver.Advice;
import org.aspectj.weaver.AdviceKind;
import org.aspectj.weaver.AjcMemberMaker;
import org.aspectj.weaver.BCException;
import org.aspectj.weaver.ConcreteTypeMunger;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.MemberImpl;
import org.aspectj.weaver.NameMangler;
import org.aspectj.weaver.NewConstructorTypeMunger;
import org.aspectj.weaver.NewFieldTypeMunger;
import org.aspectj.weaver.NewMethodTypeMunger;
import org.aspectj.weaver.ResolvedMember;
import org.aspectj.weaver.ResolvedMemberImpl;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.ShadowMunger;
import org.aspectj.weaver.UnresolvedType;
import org.aspectj.weaver.WeaverMessages;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Var;
import org.aspectj.weaver.patterns.AbstractPatternNodeVisitor;
import org.aspectj.weaver.patterns.AndPointcut;
import org.aspectj.weaver.patterns.NotPointcut;
import org.aspectj.weaver.patterns.OrPointcut;
import org.aspectj.weaver.patterns.ThisOrTargetPointcut;
/*
* Some fun implementation stuff:
*
* * expressionKind advice is non-execution advice
* * may have a target.
* * if the body is extracted, it will be extracted into
* a static method. The first argument to the static
* method is the target
* * advice may expose a this object, but that's the advice's
* consideration, not ours. This object will NOT be cached in another
* local, but will always come from frame zero.
*
* * non-expressionKind advice is execution advice
* * may have a this.
* * target is same as this, and is exposed that way to advice
* (i.e., target will not be cached, will always come from frame zero)
* * if the body is extracted, it will be extracted into a method
* with same static/dynamic modifier as enclosing method. If non-static,
* target of callback call will be this.
*
* * because of these two facts, the setup of the actual arguments (including
* possible target) callback method is the same for both kinds of advice:
* push the targetVar, if it exists (it will not exist for advice on static
* things), then push all the argVars.
*
* Protected things:
*
* * the above is sufficient for non-expressionKind advice for protected things,
* since the target will always be this.
*
* * For expressionKind things, we have to modify the signature of the callback
* method slightly. For non-static expressionKind things, we modify
* the first argument of the callback method NOT to be the type specified
* by the method/field signature (the owner), but rather we type it to
* the currentlyEnclosing type. We are guaranteed this will be fine,
* since the verifier verifies that the target is a subtype of the currently
* enclosingType.
*
* Worries:
*
* * ConstructorCalls will be weirder than all of these, since they
* supposedly don't have a target (according to AspectJ), but they clearly
* do have a target of sorts, just one that needs to be pushed on the stack,
* dupped, and not touched otherwise until the constructor runs.
*
* @author Jim Hugunin
* @author Erik Hilsdale
*
*/
public class BcelShadow extends Shadow {
private static final String[] NoDeclaredExceptions = new String[0];
private ShadowRange range;
private final BcelWorld world;
private final LazyMethodGen enclosingMethod;
// TESTING this will tell us if the optimisation succeeded *on the last shadow processed*
public static boolean appliedLazyTjpOptimization;
// Some instructions have a target type that will vary
// from the signature (pr109728) (1.4 declaring type issue)
private String actualInstructionTargetType;
/**
* This generates an unassociated shadow, rooted in a particular method but not rooted to any particular point in the code. It
* should be given to a rooted ShadowRange in the {@link ShadowRange#associateWithShadow(BcelShadow)} method.
*/
public BcelShadow(BcelWorld world, Kind kind, Member signature, LazyMethodGen enclosingMethod, BcelShadow enclosingShadow) {
super(kind, signature, enclosingShadow);
this.world = world;
this.enclosingMethod = enclosingMethod;
}
// ---- copies all state, including Shadow's mungers...
public BcelShadow copyInto(LazyMethodGen recipient, BcelShadow enclosing) {
BcelShadow s = new BcelShadow(world, getKind(), getSignature(), recipient, enclosing);
if (mungers.size() > 0) {
List src = mungers;
if (s.mungers == Collections.EMPTY_LIST) {
s.mungers = new ArrayList();
}
List dest = s.mungers;
for (Iterator i = src.iterator(); i.hasNext();) {
dest.add(i.next());
}
}
return s;
}
// ---- overridden behaviour
@Override
public World getIWorld() {
return world;
}
// see comment in deleteNewAndDup
// } else if (inst.opcode == Constants.DUP_X2) {
// // This code seen in the wild (by Brad):
// // 40: new #12; //class java/lang/StringBuffer
// // STACK: STRINGBUFFER
// // 43: dup
// // STACK: STRINGBUFFER/STRINGBUFFER
// // 44: aload_0
// // STACK: STRINGBUFFER/STRINGBUFFER/THIS
// // 45: dup_x2
// // STACK: THIS/STRINGBUFFER/STRINGBUFFER/THIS
// // 46: getfield #36; //Field value:Ljava/lang/String;
// // STACK: THIS/STRINGBUFFER/STRINGBUFFER/STRING
// // 49: invokestatic #37; //Method java/lang/String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
// // STACK: THIS/STRINGBUFFER/STRINGBUFFER/STRING
// // 52: invokespecial #19; //Method java/lang/StringBuffer."":(Ljava/lang/String;)V
// // STACK: THIS/STRINGBUFFER
// // 55: aload_1
// // STACK: THIS/STRINGBUFFER/LOCAL1
// // 56: invokevirtual #22; //Method java/lang/StringBuffer.append:(Ljava/lang/String;)Ljava/lang/StringBuffer;
// // STACK: THIS/STRINGBUFFER
// // 59: invokevirtual #34; //Method java/lang/StringBuffer.toString:()Ljava/lang/String;
// // STACK: THIS/STRING
// // 62: putfield #36; //Field value:Ljava/lang/String;
// // STACK:
// // 65: return
//
// // if we attempt to match on the ctor call to StringBuffer. then we get into trouble.
// // if we simply delete the new/dup pair without fixing up the dup_x2 then the dup_x2 will fail due to there
// // not being 3 elements on the stack for it to work with. The fix *in this situation* is to change it to
// // a simple 'dup'
//
// // this fix is *not* very clean - but a general purpose decent solution will take much longer and this
// // bytecode sequence has only been seen once in the wild.
// ih.setInstruction(InstructionConstants.DUP);
/**
* The new/dup (or new/dup_x1/swap) are removed and will be readded later (after the advice call) by the caller of this method.
* The groovy compiler produces unusual code where the new/dup isn't visible (when making a this() call from an existing ctor),
* an aload_0 is used to load the uninitialized object (as an example see the ctors in grails.util.BuildSettings).
*
* @return true if managed to remove them
*/
private boolean deleteNewAndDup() {
final ConstantPool cpool = getEnclosingClass().getConstantPool();
int depth = 1;
InstructionHandle ih = range.getStart();
// Go back from where we are looking for 'NEW' that takes us to a stack depth of 0. INVOKESPECIAL
while (ih != null) {
Instruction inst = ih.getInstruction();
if (inst.opcode == Constants.INVOKESPECIAL && ((InvokeInstruction) inst).getName(cpool).equals("")) {
depth++;
} else if (inst.opcode == Constants.NEW) {
depth--;
if (depth == 0) {
break;
}
// need a testcase to show this can really happen in a modern compiler - removed due to 315398 - moved this out to
// comment proceeding this method:
}
ih = ih.getPrev();
}
if (ih == null) {
return false;
}
// now IH points to the NEW. We're followed by the DUP, and that is followed
// by the actual instruction we care about.
InstructionHandle newHandle = ih;
InstructionHandle endHandle = newHandle.getNext();
InstructionHandle nextHandle;
if (endHandle.getInstruction().opcode == Constants.DUP) {
nextHandle = endHandle.getNext();
retargetFrom(newHandle, nextHandle);
retargetFrom(endHandle, nextHandle);
} else if (endHandle.getInstruction().opcode == Constants.DUP_X1) {
InstructionHandle dupHandle = endHandle;
endHandle = endHandle.getNext();
nextHandle = endHandle.getNext();
boolean skipEndRepositioning = false;
if (endHandle.getInstruction().opcode == Constants.SWAP) {
} else if (endHandle.getInstruction().opcode == Constants.IMPDEP1) {
skipEndRepositioning = true; // pr186884
} else {
// XXX see next XXX comment
throw new RuntimeException("Unhandled kind of new " + endHandle);
}
// Now make any jumps to the 'new', the 'dup' or the 'end' now target the nextHandle
retargetFrom(newHandle, nextHandle);
retargetFrom(dupHandle, nextHandle);
if (!skipEndRepositioning) {
retargetFrom(endHandle, nextHandle);
}
} else {
endHandle = newHandle;
nextHandle = endHandle.getNext();
retargetFrom(newHandle, nextHandle);
// add a POP here... we found a NEW w/o a dup or anything else, so
// we must be in statement context.
getRange().insert(InstructionConstants.POP, Range.OutsideAfter);
}
// assert (dupHandle.getInstruction() instanceof DUP);
try {
range.getBody().delete(newHandle, endHandle);
} catch (TargetLostException e) {
throw new BCException("shouldn't happen");
}
return true;
}
private void retargetFrom(InstructionHandle old, InstructionHandle fresh) {
for (InstructionTargeter targeter : old.getTargetersCopy()) {
if (targeter instanceof ExceptionRange) {
ExceptionRange it = (ExceptionRange) targeter;
it.updateTarget(old, fresh, it.getBody());
} else {
targeter.updateTarget(old, fresh);
}
}
}
// records advice that is stopping us doing the lazyTjp optimization
private List badAdvice = null;
public void addAdvicePreventingLazyTjp(BcelAdvice advice) {
if (badAdvice == null) {
badAdvice = new ArrayList();
}
badAdvice.add(advice);
}
@Override
protected void prepareForMungers() {
// if we're a constructor call, we need to remove the new:dup or the new:dup_x1:swap,
// and store all our arguments on the frame.
// ??? This is a bit of a hack (for the Java langauge). We do this because
// we sometime add code "outsideBefore" when dealing with weaving join points. We only
// do this for exposing state that is on the stack. It turns out to just work for
// everything except for constructor calls and exception handlers. If we were to clean
// this up, every ShadowRange would have three instructionHandle points, the start of
// the arg-setup code, the start of the running code, and the end of the running code.
boolean deletedNewAndDup = true;
if (getKind() == ConstructorCall) {
if (!world.isJoinpointArrayConstructionEnabled() || !this.getSignature().getDeclaringType().isArray()) {
deletedNewAndDup = deleteNewAndDup(); // no new/dup for new array construction
}
initializeArgVars();
} else if (getKind() == PreInitialization) { // pr74952
ShadowRange range = getRange();
range.insert(InstructionConstants.NOP, Range.InsideAfter);
} else if (getKind() == ExceptionHandler) {
ShadowRange range = getRange();
InstructionList body = range.getBody();
InstructionHandle start = range.getStart();
// Create a store instruction to put the value from the top of the
// stack into a local variable slot. This is a trimmed version of
// what is in initializeArgVars() (since there is only one argument
// at a handler jp and only before advice is supported) (pr46298)
argVars = new BcelVar[1];
// int positionOffset = (hasTarget() ? 1 : 0) + ((hasThis() && !getKind().isTargetSameAsThis()) ? 1 : 0);
UnresolvedType tx = getArgType(0);
argVars[0] = genTempVar(tx, "ajc$arg0");
InstructionHandle insertedInstruction = range.insert(argVars[0].createStore(getFactory()), Range.OutsideBefore);
// Now the exception range starts just after our new instruction.
// The next bit of code changes the exception range to point at
// the store instruction
for (InstructionTargeter t : start.getTargetersCopy()) {
if (t instanceof ExceptionRange) {
ExceptionRange er = (ExceptionRange) t;
er.updateTarget(start, insertedInstruction, body);
}
}
}
// now we ask each munger to request our state
isThisJoinPointLazy = true;// world.isXlazyTjp(); // lazy is default now
badAdvice = null;
for (ShadowMunger munger : mungers) {
munger.specializeOn(this);
}
initializeThisJoinPoint();
if (thisJoinPointVar != null && !isThisJoinPointLazy && badAdvice != null && badAdvice.size() > 1) {
// something stopped us making it a lazy tjp
// can't build tjp lazily, no suitable test...
int valid = 0;
for (Iterator iter = badAdvice.iterator(); iter.hasNext();) {
BcelAdvice element = iter.next();
ISourceLocation sLoc = element.getSourceLocation();
if (sLoc != null && sLoc.getLine() > 0) {
valid++;
}
}
if (valid != 0) {
ISourceLocation[] badLocs = new ISourceLocation[valid];
int i = 0;
for (Iterator iter = badAdvice.iterator(); iter.hasNext();) {
BcelAdvice element = iter.next();
ISourceLocation sLoc = element.getSourceLocation();
if (sLoc != null) {
badLocs[i++] = sLoc;
}
}
world.getLint().multipleAdviceStoppingLazyTjp
.signal(new String[] { this.toString() }, getSourceLocation(), badLocs);
}
}
badAdvice = null;
// If we are an expression kind, we require our target/arguments on the stack
// before we do our actual thing. However, they may have been removed
// from the stack as the shadowMungers have requested state.
// if any of our shadowMungers requested either the arguments or target,
// the munger will have added code
// to pop the target/arguments into temporary variables, represented by
// targetVar and argVars. In such a case, we must make sure to re-push the
// values.
// If we are nonExpressionKind, we don't expect arguments on the stack
// so this is moot. If our argVars happen to be null, then we know that
// no ShadowMunger has squirrelled away our arguments, so they're still
// on the stack.
InstructionFactory fact = getFactory();
if (getKind().argsOnStack() && argVars != null) {
// Special case first (pr46298). If we are an exception handler and the instruction
// just after the shadow is a POP then we should remove the pop. The code
// above which generated the store instruction has already cleared the stack.
// We also don't generate any code for the arguments in this case as it would be
// an incorrect aload.
if (getKind() == ExceptionHandler && range.getEnd().getNext().getInstruction().equals(InstructionConstants.POP)) {
// easier than deleting it ...
range.getEnd().getNext().setInstruction(InstructionConstants.NOP);
} else {
range.insert(BcelRenderer.renderExprs(fact, world, argVars), Range.InsideBefore);
if (targetVar != null) {
range.insert(BcelRenderer.renderExpr(fact, world, targetVar), Range.InsideBefore);
}
if (getKind() == ConstructorCall) {
if (!world.isJoinpointArrayConstructionEnabled() || !this.getSignature().getDeclaringType().isArray()) {
if (deletedNewAndDup) { // if didnt delete them, dont insert any!
range.insert(InstructionFactory.createDup(1), Range.InsideBefore);
range.insert(fact.createNew((ObjectType) BcelWorld.makeBcelType(getSignature().getDeclaringType())),
Range.InsideBefore);
}
}
}
}
}
}
// ---- getters
public ShadowRange getRange() {
return range;
}
public void setRange(ShadowRange range) {
this.range = range;
}
private int sourceline = -1;
public int getSourceLine() {
// if the kind of join point for which we are a shadow represents
// a method or constructor execution, then the best source line is
// the one from the enclosingMethod declarationLineNumber if available.
if (sourceline != -1) {
return sourceline;
}
Kind kind = getKind();
if ((kind == MethodExecution) || (kind == ConstructorExecution) || (kind == AdviceExecution)
|| (kind == StaticInitialization) || (kind == PreInitialization) || (kind == Initialization)) {
if (getEnclosingMethod().hasDeclaredLineNumberInfo()) {
sourceline = getEnclosingMethod().getDeclarationLineNumber();
return sourceline;
}
}
if (range == null) {
if (getEnclosingMethod().hasBody()) {
sourceline = Utility.getSourceLine(getEnclosingMethod().getBody().getStart());
return sourceline;
} else {
sourceline = 0;
return sourceline;
}
}
sourceline = Utility.getSourceLine(range.getStart());
if (sourceline < 0) {
sourceline = 0;
}
return sourceline;
}
@Override
public ResolvedType getEnclosingType() {
return getEnclosingClass().getType();
}
public LazyClassGen getEnclosingClass() {
return enclosingMethod.getEnclosingClass();
}
public BcelWorld getWorld() {
return world;
}
// ---- factory methods
public static BcelShadow makeConstructorExecution(BcelWorld world, LazyMethodGen enclosingMethod,
InstructionHandle justBeforeStart) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, ConstructorExecution, world.makeJoinPointSignatureFromMethod(enclosingMethod,
Member.CONSTRUCTOR), enclosingMethod, null);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, justBeforeStart.getNext()), Range.genEnd(body));
return s;
}
public static BcelShadow makeStaticInitialization(BcelWorld world, LazyMethodGen enclosingMethod) {
InstructionList body = enclosingMethod.getBody();
// move the start past ajc$preClinit
InstructionHandle clinitStart = body.getStart();
if (clinitStart.getInstruction() instanceof InvokeInstruction) {
InvokeInstruction ii = (InvokeInstruction) clinitStart.getInstruction();
if (ii.getName(enclosingMethod.getEnclosingClass().getConstantPool()).equals(NameMangler.AJC_PRE_CLINIT_NAME)) {
clinitStart = clinitStart.getNext();
}
}
InstructionHandle clinitEnd = body.getEnd();
// XXX should move the end before the postClinit, but the return is then tricky...
// if (clinitEnd.getInstruction() instanceof InvokeInstruction) {
// InvokeInstruction ii = (InvokeInstruction)clinitEnd.getInstruction();
// if (ii.getName(enclosingMethod.getEnclosingClass().getConstantPool()).equals(NameMangler.AJC_POST_CLINIT_NAME)) {
// clinitEnd = clinitEnd.getPrev();
// }
// }
BcelShadow s = new BcelShadow(world, StaticInitialization, world.makeJoinPointSignatureFromMethod(enclosingMethod,
Member.STATIC_INITIALIZATION), enclosingMethod, null);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, clinitStart), Range.genEnd(body, clinitEnd));
return s;
}
/**
* Make the shadow for an exception handler. Currently makes an empty shadow that only allows before advice to be woven into it.
*/
public static BcelShadow makeExceptionHandler(BcelWorld world, ExceptionRange exceptionRange, LazyMethodGen enclosingMethod,
InstructionHandle startOfHandler, BcelShadow enclosingShadow) {
InstructionList body = enclosingMethod.getBody();
UnresolvedType catchType = exceptionRange.getCatchType();
UnresolvedType inType = enclosingMethod.getEnclosingClass().getType();
ResolvedMemberImpl sig = MemberImpl.makeExceptionHandlerSignature(inType, catchType);
sig.setParameterNames(new String[] { findHandlerParamName(startOfHandler) });
BcelShadow s = new BcelShadow(world, ExceptionHandler, sig, enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
InstructionHandle start = Range.genStart(body, startOfHandler);
InstructionHandle end = Range.genEnd(body, start);
r.associateWithTargets(start, end);
exceptionRange.updateTarget(startOfHandler, start, body);
return s;
}
private static String findHandlerParamName(InstructionHandle startOfHandler) {
if (startOfHandler.getInstruction().isStoreInstruction() && startOfHandler.getNext() != null) {
int slot = startOfHandler.getInstruction().getIndex();
// System.out.println("got store: " + startOfHandler.getInstruction() + ", " + index);
Iterator tIter = startOfHandler.getNext().getTargeters().iterator();
while (tIter.hasNext()) {
InstructionTargeter targeter = tIter.next();
if (targeter instanceof LocalVariableTag) {
LocalVariableTag t = (LocalVariableTag) targeter;
if (t.getSlot() == slot) {
return t.getName();
}
}
}
}
return "";
}
/** create an init join point associated w/ an interface in the body of a constructor */
public static BcelShadow makeIfaceInitialization(BcelWorld world, LazyMethodGen constructor,
Member interfaceConstructorSignature) {
// this call marks the instruction list as changed
constructor.getBody();
// UnresolvedType inType = constructor.getEnclosingClass().getType();
BcelShadow s = new BcelShadow(world, Initialization, interfaceConstructorSignature, constructor, null);
// s.fallsThrough = true;
// ShadowRange r = new ShadowRange(body);
// r.associateWithShadow(s);
// InstructionHandle start = Range.genStart(body, handle);
// InstructionHandle end = Range.genEnd(body, handle);
//
// r.associateWithTargets(start, end);
return s;
}
public void initIfaceInitializer(InstructionHandle end) {
final InstructionList body = enclosingMethod.getBody();
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(this);
InstructionHandle nop = body.insert(end, InstructionConstants.NOP);
r.associateWithTargets(Range.genStart(body, nop), Range.genEnd(body, nop));
}
// public static BcelShadow makeIfaceConstructorExecution(
// BcelWorld world,
// LazyMethodGen constructor,
// InstructionHandle next,
// Member interfaceConstructorSignature)
// {
// // final InstructionFactory fact = constructor.getEnclosingClass().getFactory();
// InstructionList body = constructor.getBody();
// // UnresolvedType inType = constructor.getEnclosingClass().getType();
// BcelShadow s =
// new BcelShadow(
// world,
// ConstructorExecution,
// interfaceConstructorSignature,
// constructor,
// null);
// s.fallsThrough = true;
// ShadowRange r = new ShadowRange(body);
// r.associateWithShadow(s);
// // ??? this may or may not work
// InstructionHandle start = Range.genStart(body, next);
// //InstructionHandle end = Range.genEnd(body, body.append(start, fact.NOP));
// InstructionHandle end = Range.genStart(body, next);
// //body.append(start, fact.NOP);
//
// r.associateWithTargets(start, end);
// return s;
// }
/**
* Create an initialization join point associated with a constructor, but not with any body of code yet. If this is actually
* matched, it's range will be set when we inline self constructors.
*
* @param constructor The constructor starting this initialization.
*/
public static BcelShadow makeUnfinishedInitialization(BcelWorld world, LazyMethodGen constructor) {
BcelShadow ret = new BcelShadow(world, Initialization, world.makeJoinPointSignatureFromMethod(constructor,
Member.CONSTRUCTOR), constructor, null);
if (constructor.getEffectiveSignature() != null) {
ret.setMatchingSignature(constructor.getEffectiveSignature().getEffectiveSignature());
}
return ret;
}
public static BcelShadow makeUnfinishedPreinitialization(BcelWorld world, LazyMethodGen constructor) {
BcelShadow ret = new BcelShadow(world, PreInitialization, world.makeJoinPointSignatureFromMethod(constructor,
Member.CONSTRUCTOR), constructor, null);
if (constructor.getEffectiveSignature() != null) {
ret.setMatchingSignature(constructor.getEffectiveSignature().getEffectiveSignature());
}
return ret;
}
public static BcelShadow makeMethodExecution(BcelWorld world, LazyMethodGen enclosingMethod, boolean lazyInit) {
if (!lazyInit) {
return makeMethodExecution(world, enclosingMethod);
}
BcelShadow s = new BcelShadow(world, MethodExecution, enclosingMethod.getMemberView(), enclosingMethod, null);
return s;
}
public void init() {
if (range != null) {
return;
}
final InstructionList body = enclosingMethod.getBody();
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(this);
r.associateWithTargets(Range.genStart(body), Range.genEnd(body));
}
public static BcelShadow makeMethodExecution(BcelWorld world, LazyMethodGen enclosingMethod) {
return makeShadowForMethod(world, enclosingMethod, MethodExecution, enclosingMethod.getMemberView());
}
public static BcelShadow makeShadowForMethod(BcelWorld world, LazyMethodGen enclosingMethod, Shadow.Kind kind, Member sig) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, kind, sig, enclosingMethod, null);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(// OPTIMIZE this occurs lots of times for all jp kinds...
Range.genStart(body), Range.genEnd(body));
return s;
}
public static BcelShadow makeAdviceExecution(BcelWorld world, LazyMethodGen enclosingMethod) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, AdviceExecution,
world.makeJoinPointSignatureFromMethod(enclosingMethod, Member.ADVICE), enclosingMethod, null);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body), Range.genEnd(body));
return s;
}
// constructor call shadows are initially just around the
// call to the constructor. If ANY advice gets put on it, we move
// the NEW instruction inside the join point, which involves putting
// all the arguments in temps.
public static BcelShadow makeConstructorCall(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle callHandle,
BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
Member sig = world.makeJoinPointSignatureForMethodInvocation(enclosingMethod.getEnclosingClass(),
(InvokeInstruction) callHandle.getInstruction());
BcelShadow s = new BcelShadow(world, ConstructorCall, sig, enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, callHandle), Range.genEnd(body, callHandle));
retargetAllBranches(callHandle, r.getStart());
return s;
}
public static BcelShadow makeArrayConstructorCall(BcelWorld world, LazyMethodGen enclosingMethod,
InstructionHandle arrayInstruction, BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
Member sig = world.makeJoinPointSignatureForArrayConstruction(enclosingMethod.getEnclosingClass(), arrayInstruction);
BcelShadow s = new BcelShadow(world, ConstructorCall, sig, enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, arrayInstruction), Range.genEnd(body, arrayInstruction));
retargetAllBranches(arrayInstruction, r.getStart());
return s;
}
public static BcelShadow makeMonitorEnter(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle monitorInstruction,
BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
Member sig = world.makeJoinPointSignatureForMonitorEnter(enclosingMethod.getEnclosingClass(), monitorInstruction);
BcelShadow s = new BcelShadow(world, SynchronizationLock, sig, enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, monitorInstruction), Range.genEnd(body, monitorInstruction));
retargetAllBranches(monitorInstruction, r.getStart());
return s;
}
public static BcelShadow makeMonitorExit(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle monitorInstruction,
BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
Member sig = world.makeJoinPointSignatureForMonitorExit(enclosingMethod.getEnclosingClass(), monitorInstruction);
BcelShadow s = new BcelShadow(world, SynchronizationUnlock, sig, enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, monitorInstruction), Range.genEnd(body, monitorInstruction));
retargetAllBranches(monitorInstruction, r.getStart());
return s;
}
// see pr77166
// public static BcelShadow makeArrayLoadCall(
// BcelWorld world,
// LazyMethodGen enclosingMethod,
// InstructionHandle arrayInstruction,
// BcelShadow enclosingShadow)
// {
// final InstructionList body = enclosingMethod.getBody();
// Member sig = world.makeJoinPointSignatureForArrayLoad(enclosingMethod.getEnclosingClass(),arrayInstruction);
// BcelShadow s =
// new BcelShadow(
// world,
// MethodCall,
// sig,
// enclosingMethod,
// enclosingShadow);
// ShadowRange r = new ShadowRange(body);
// r.associateWithShadow(s);
// r.associateWithTargets(
// Range.genStart(body, arrayInstruction),
// Range.genEnd(body, arrayInstruction));
// retargetAllBranches(arrayInstruction, r.getStart());
// return s;
// }
public static BcelShadow makeMethodCall(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle callHandle,
BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, MethodCall, world.makeJoinPointSignatureForMethodInvocation(
enclosingMethod.getEnclosingClass(), (InvokeInstruction) callHandle.getInstruction()), enclosingMethod,
enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, callHandle), Range.genEnd(body, callHandle));
retargetAllBranches(callHandle, r.getStart());
return s;
}
public static BcelShadow makeShadowForMethodCall(BcelWorld world, LazyMethodGen enclosingMethod, InstructionHandle callHandle,
BcelShadow enclosingShadow, Kind kind, ResolvedMember sig) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, kind, sig, enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, callHandle), Range.genEnd(body, callHandle));
retargetAllBranches(callHandle, r.getStart());
return s;
}
public static BcelShadow makeFieldGet(BcelWorld world, ResolvedMember field, LazyMethodGen enclosingMethod,
InstructionHandle getHandle, BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, FieldGet, field,
// BcelWorld.makeFieldSignature(
// enclosingMethod.getEnclosingClass(),
// (FieldInstruction) getHandle.getInstruction()),
enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, getHandle), Range.genEnd(body, getHandle));
retargetAllBranches(getHandle, r.getStart());
return s;
}
public static BcelShadow makeFieldSet(BcelWorld world, ResolvedMember field, LazyMethodGen enclosingMethod,
InstructionHandle setHandle, BcelShadow enclosingShadow) {
final InstructionList body = enclosingMethod.getBody();
BcelShadow s = new BcelShadow(world, FieldSet, field,
// BcelWorld.makeFieldJoinPointSignature(
// enclosingMethod.getEnclosingClass(),
// (FieldInstruction) setHandle.getInstruction()),
enclosingMethod, enclosingShadow);
ShadowRange r = new ShadowRange(body);
r.associateWithShadow(s);
r.associateWithTargets(Range.genStart(body, setHandle), Range.genEnd(body, setHandle));
retargetAllBranches(setHandle, r.getStart());
return s;
}
public static void retargetAllBranches(InstructionHandle from, InstructionHandle to) {
for (InstructionTargeter source : from.getTargetersCopy()) {
if (source instanceof InstructionBranch) {
source.updateTarget(from, to);
}
}
}
// // ---- type access methods
// private ObjectType getTargetBcelType() {
// return (ObjectType) BcelWorld.makeBcelType(getTargetType());
// }
// private Type getArgBcelType(int arg) {
// return BcelWorld.makeBcelType(getArgType(arg));
// }
// ---- kinding
/**
* If the end of my range has no real instructions following then my context needs a return at the end.
*/
public boolean terminatesWithReturn() {
return getRange().getRealNext() == null;
}
/**
* Is arg0 occupied with the value of this
*/
public boolean arg0HoldsThis() {
if (getKind().isEnclosingKind()) {
return !Modifier.isStatic(getSignature().getModifiers());
} else if (enclosingShadow == null) {
// XXX this is mostly right
// this doesn't do the right thing for calls in the pre part of introduced constructors.
return !enclosingMethod.isStatic();
} else {
return ((BcelShadow) enclosingShadow).arg0HoldsThis();
}
}
// ---- argument getting methods
private BcelVar thisVar = null;
private BcelVar targetVar = null;
private BcelVar[] argVars = null;
private Map kindedAnnotationVars = null;
private Map thisAnnotationVars = null;
private Map targetAnnotationVars = null;
// private Map/* */[] argAnnotationVars = null;
private Map withinAnnotationVars = null;
private Map withincodeAnnotationVars = null;
private boolean allArgVarsInitialized = false;
@Override
public Var getThisVar() {
if (!hasThis()) {
throw new IllegalStateException("no this");
}
initializeThisVar();
return thisVar;
}
@Override
public Var getThisAnnotationVar(UnresolvedType forAnnotationType) {
if (!hasThis()) {
throw new IllegalStateException("no this");
}
initializeThisAnnotationVars(); // FIXME asc Why bother with this if we always return one?
// Even if we can't find one, we have to return one as we might have this annotation at runtime
Var v = thisAnnotationVars.get(forAnnotationType);
if (v == null) {
v = new TypeAnnotationAccessVar(forAnnotationType.resolve(world), (BcelVar) getThisVar());
}
return v;
}
@Override
public Var getTargetVar() {
if (!hasTarget()) {
throw new IllegalStateException("no target");
}
initializeTargetVar();
return targetVar;
}
@Override
public Var getTargetAnnotationVar(UnresolvedType forAnnotationType) {
if (!hasTarget()) {
throw new IllegalStateException("no target");
}
initializeTargetAnnotationVars(); // FIXME asc why bother with this if we always return one?
Var v = targetAnnotationVars.get(forAnnotationType);
// Even if we can't find one, we have to return one as we might have this annotation at runtime
if (v == null) {
v = new TypeAnnotationAccessVar(forAnnotationType.resolve(world), (BcelVar) getTargetVar());
}
return v;
}
@Override
public Var getArgVar(int i) {
ensureInitializedArgVar(i);
return argVars[i];
}
@Override
public Var getArgAnnotationVar(int i, UnresolvedType forAnnotationType) {
return new TypeAnnotationAccessVar(forAnnotationType.resolve(world), (BcelVar) getArgVar(i));
// initializeArgAnnotationVars();
//
// Var v = (Var) argAnnotationVars[i].get(forAnnotationType);
// if (v == null) {
// v = new TypeAnnotationAccessVar(forAnnotationType.resolve(world), (BcelVar) getArgVar(i));
// }
// return v;
}
@Override
public Var getKindedAnnotationVar(UnresolvedType forAnnotationType) {
initializeKindedAnnotationVars();
return kindedAnnotationVars.get(forAnnotationType);
}
@Override
public Var getWithinAnnotationVar(UnresolvedType forAnnotationType) {
initializeWithinAnnotationVars();
return withinAnnotationVars.get(forAnnotationType);
}
@Override
public Var getWithinCodeAnnotationVar(UnresolvedType forAnnotationType) {
initializeWithinCodeAnnotationVars();
return withincodeAnnotationVars.get(forAnnotationType);
}
// reflective thisJoinPoint support
private BcelVar thisJoinPointVar = null;
private boolean isThisJoinPointLazy;
private int lazyTjpConsumers = 0;
private BcelVar thisJoinPointStaticPartVar = null;
// private BcelVar thisEnclosingJoinPointStaticPartVar = null;
@Override
public final Var getThisJoinPointStaticPartVar() {
return getThisJoinPointStaticPartBcelVar();
}
@Override
public final Var getThisEnclosingJoinPointStaticPartVar() {
return getThisEnclosingJoinPointStaticPartBcelVar();
}
public void requireThisJoinPoint(boolean hasGuardTest, boolean isAround) {
if (!isAround) {
if (!hasGuardTest) {
isThisJoinPointLazy = false;
} else {
lazyTjpConsumers++;
}
}
// if (!hasGuardTest) {
// isThisJoinPointLazy = false;
// } else {
// lazyTjpConsumers++;
// }
if (thisJoinPointVar == null) {
thisJoinPointVar = genTempVar(UnresolvedType.forName("org.aspectj.lang.JoinPoint"));
}
}
@Override
public Var getThisJoinPointVar() {
requireThisJoinPoint(false, false);
return thisJoinPointVar;
}
void initializeThisJoinPoint() {
if (thisJoinPointVar == null) {
return;
}
if (isThisJoinPointLazy) {
isThisJoinPointLazy = checkLazyTjp();
}
if (isThisJoinPointLazy) {
appliedLazyTjpOptimization = true;
createThisJoinPoint(); // make sure any state needed is initialized, but throw the instructions out
if (lazyTjpConsumers == 1) {
return; // special case only one lazyTjpUser
}
InstructionFactory fact = getFactory();
InstructionList il = new InstructionList();
il.append(InstructionConstants.ACONST_NULL);
il.append(thisJoinPointVar.createStore(fact));
range.insert(il, Range.OutsideBefore);
} else {
appliedLazyTjpOptimization = false;
InstructionFactory fact = getFactory();
InstructionList il = createThisJoinPoint();
il.append(thisJoinPointVar.createStore(fact));
range.insert(il, Range.OutsideBefore);
}
}
private boolean checkLazyTjp() {
// check for around advice
for (Iterator i = mungers.iterator(); i.hasNext();) {
ShadowMunger munger = i.next();
if (munger instanceof Advice) {
if (((Advice) munger).getKind() == AdviceKind.Around) {
if (munger.getSourceLocation() != null) { // do we know enough to bother reporting?
if (world.getLint().canNotImplementLazyTjp.isEnabled()) {
world.getLint().canNotImplementLazyTjp.signal(new String[] { toString() }, getSourceLocation(),
new ISourceLocation[] { munger.getSourceLocation() });
}
}
return false;
}
}
}
return true;
}
InstructionList loadThisJoinPoint() {
InstructionFactory fact = getFactory();
InstructionList il = new InstructionList();
if (isThisJoinPointLazy) {
// If we're lazy, build the join point right here.
il.append(createThisJoinPoint());
// Does someone else need it? If so, store it for later retrieval
if (lazyTjpConsumers > 1) {
il.append(thisJoinPointVar.createStore(fact));
InstructionHandle end = il.append(thisJoinPointVar.createLoad(fact));
il.insert(InstructionFactory.createBranchInstruction(Constants.IFNONNULL, end));
il.insert(thisJoinPointVar.createLoad(fact));
}
} else {
// If not lazy, its already been built and stored, just retrieve it
thisJoinPointVar.appendLoad(il, fact);
}
return il;
}
InstructionList createThisJoinPoint() {
InstructionFactory fact = getFactory();
InstructionList il = new InstructionList();
BcelVar staticPart = getThisJoinPointStaticPartBcelVar();
staticPart.appendLoad(il, fact);
if (hasThis()) {
((BcelVar) getThisVar()).appendLoad(il, fact);
} else {
il.append(InstructionConstants.ACONST_NULL);
}
if (hasTarget()) {
((BcelVar) getTargetVar()).appendLoad(il, fact);
} else {
il.append(InstructionConstants.ACONST_NULL);
}
switch (getArgCount()) {
case 0:
il.append(fact.createInvoke("org.aspectj.runtime.reflect.Factory", "makeJP", LazyClassGen.tjpType, new Type[] {
LazyClassGen.staticTjpType, Type.OBJECT, Type.OBJECT }, Constants.INVOKESTATIC));
break;
case 1:
((BcelVar) getArgVar(0)).appendLoadAndConvert(il, fact, world.getCoreType(ResolvedType.OBJECT));
il.append(fact.createInvoke("org.aspectj.runtime.reflect.Factory", "makeJP", LazyClassGen.tjpType, new Type[] {
LazyClassGen.staticTjpType, Type.OBJECT, Type.OBJECT, Type.OBJECT }, Constants.INVOKESTATIC));
break;
case 2:
((BcelVar) getArgVar(0)).appendLoadAndConvert(il, fact, world.getCoreType(ResolvedType.OBJECT));
((BcelVar) getArgVar(1)).appendLoadAndConvert(il, fact, world.getCoreType(ResolvedType.OBJECT));
il.append(fact.createInvoke("org.aspectj.runtime.reflect.Factory", "makeJP", LazyClassGen.tjpType, new Type[] {
LazyClassGen.staticTjpType, Type.OBJECT, Type.OBJECT, Type.OBJECT, Type.OBJECT }, Constants.INVOKESTATIC));
break;
default:
il.append(makeArgsObjectArray());
il.append(fact.createInvoke("org.aspectj.runtime.reflect.Factory", "makeJP", LazyClassGen.tjpType, new Type[] {
LazyClassGen.staticTjpType, Type.OBJECT, Type.OBJECT, new ArrayType(Type.OBJECT, 1) }, Constants.INVOKESTATIC));
break;
}
return il;
}
public BcelVar getThisJoinPointStaticPartBcelVar() {
return getThisJoinPointStaticPartBcelVar(false);
}
@Override
public BcelVar getThisAspectInstanceVar(ResolvedType aspectType) {
return new AspectInstanceVar(aspectType);
}
/**
* Get the Var for the xxxxJpStaticPart, xxx = this or enclosing
*
* @param isEnclosingJp true to have the enclosingJpStaticPart
* @return
*/
public BcelVar getThisJoinPointStaticPartBcelVar(final boolean isEnclosingJp) {
if (thisJoinPointStaticPartVar == null) {
Field field = getEnclosingClass().getTjpField(this, isEnclosingJp);
ResolvedType sjpType = null;
if (world.isTargettingAspectJRuntime12()) { // TAG:SUPPORTING12: We didn't have different jpsp types in 1.2
sjpType = world.getCoreType(UnresolvedType.JOINPOINT_STATICPART);
} else {
sjpType = isEnclosingJp ? world.getCoreType(UnresolvedType.JOINPOINT_ENCLOSINGSTATICPART) : world
.getCoreType(UnresolvedType.JOINPOINT_STATICPART);
}
thisJoinPointStaticPartVar = new BcelFieldRef(sjpType, getEnclosingClass().getClassName(), field.getName());
// getEnclosingClass().warnOnAddedStaticInitializer(this,munger.getSourceLocation());
}
return thisJoinPointStaticPartVar;
}
/**
* Get the Var for the enclosingJpStaticPart
*
* @return
*/
public BcelVar getThisEnclosingJoinPointStaticPartBcelVar() {
if (enclosingShadow == null) {
// the enclosing of an execution is itself
return getThisJoinPointStaticPartBcelVar(true);
} else {
return ((BcelShadow) enclosingShadow).getThisJoinPointStaticPartBcelVar(true);
}
}
// ??? need to better understand all the enclosing variants
@Override
public Member getEnclosingCodeSignature() {
if (getKind().isEnclosingKind()) {
return getSignature();
} else if (getKind() == Shadow.PreInitialization) {
// PreInit doesn't enclose code but its signature
// is correctly the signature of the ctor.
return getSignature();
} else if (enclosingShadow == null) {
return getEnclosingMethod().getMemberView();
} else {
return enclosingShadow.getSignature();
}
}
public Member getRealEnclosingCodeSignature() {
return enclosingMethod.getMemberView();
}
// public Member getEnclosingCodeSignatureForModel() {
// if (getKind().isEnclosingKind()) {
// return getSignature();
// } else if (getKind() == Shadow.PreInitialization) {
// // PreInit doesn't enclose code but its signature
// // is correctly the signature of the ctor.
// return getSignature();
// } else if (enclosingShadow == null) {
// return getEnclosingMethod().getMemberView();
// } else {
// if (enclosingShadow.getKind() == Shadow.MethodExecution && enclosingMethod.getEffectiveSignature() != null) {
//
// } else {
// return enclosingShadow.getSignature();
// }
// }
// }
private InstructionList makeArgsObjectArray() {
InstructionFactory fact = getFactory();
BcelVar arrayVar = genTempVar(UnresolvedType.OBJECTARRAY);
final InstructionList il = new InstructionList();
int alen = getArgCount();
il.append(Utility.createConstant(fact, alen));
il.append(fact.createNewArray(Type.OBJECT, (short) 1));
arrayVar.appendStore(il, fact);
int stateIndex = 0;
for (int i = 0, len = getArgCount(); i < len; i++) {
arrayVar.appendConvertableArrayStore(il, fact, stateIndex, (BcelVar) getArgVar(i));
stateIndex++;
}
arrayVar.appendLoad(il, fact);
return il;
}
// ---- initializing var tables
/*
* initializing this is doesn't do anything, because this is protected from side-effects, so we don't need to copy its location
*/
private void initializeThisVar() {
if (thisVar != null) {
return;
}
thisVar = new BcelVar(getThisType().resolve(world), 0);
thisVar.setPositionInAroundState(0);
}
public void initializeTargetVar() {
InstructionFactory fact = getFactory();
if (targetVar != null) {
return;
}
if (getKind().isTargetSameAsThis()) {
if (hasThis()) {
initializeThisVar();
}
targetVar = thisVar;
} else {
initializeArgVars(); // gotta pop off the args before we find the target
UnresolvedType type = getTargetType();
type = ensureTargetTypeIsCorrect(type);
targetVar = genTempVar(type, "ajc$target");
range.insert(targetVar.createStore(fact), Range.OutsideBefore);
targetVar.setPositionInAroundState(hasThis() ? 1 : 0);
}
}
/*
* PR 72528 This method double checks the target type under certain conditions. The Java 1.4 compilers seem to take calls to
* clone methods on array types and create bytecode that looks like clone is being called on Object. If we advise a clone call
* with around advice we extract the call into a helper method which we can then refer to. Because the type in the bytecode for
* the call to clone is Object we create a helper method with an Object parameter - this is not correct as we have lost the fact
* that the actual type is an array type. If we don't do the check below we will create code that fails java verification. This
* method checks for the peculiar set of conditions and if they are true, it has a sneak peek at the code before the call to see
* what is on the stack.
*/
public UnresolvedType ensureTargetTypeIsCorrect(UnresolvedType tx) {
Member msig = getSignature();
if (msig.getArity() == 0 && getKind() == MethodCall && msig.getName().charAt(0) == 'c' && tx.equals(ResolvedType.OBJECT)
&& msig.getReturnType().equals(ResolvedType.OBJECT) && msig.getName().equals("clone")) {
// Lets go back through the code from the start of the shadow
InstructionHandle searchPtr = range.getStart().getPrev();
while (Range.isRangeHandle(searchPtr) || searchPtr.getInstruction().isStoreInstruction()) { // ignore this instruction -
// it doesnt give us the
// info we want
searchPtr = searchPtr.getPrev();
}
// A load instruction may tell us the real type of what the clone() call is on
if (searchPtr.getInstruction().isLoadInstruction()) {
LocalVariableTag lvt = LazyMethodGen.getLocalVariableTag(searchPtr, searchPtr.getInstruction().getIndex());
if (lvt != null) {
return UnresolvedType.forSignature(lvt.getType());
}
}
// A field access instruction may tell us the real type of what the clone() call is on
if (searchPtr.getInstruction() instanceof FieldInstruction) {
FieldInstruction si = (FieldInstruction) searchPtr.getInstruction();
Type t = si.getFieldType(getEnclosingClass().getConstantPool());
return BcelWorld.fromBcel(t);
}
// A new array instruction obviously tells us it is an array type !
if (searchPtr.getInstruction().opcode == Constants.ANEWARRAY) {
// ANEWARRAY ana = (ANEWARRAY)searchPoint.getInstruction();
// Type t = ana.getType(getEnclosingClass().getConstantPool());
// Just use a standard java.lang.object array - that will work fine
return BcelWorld.fromBcel(new ArrayType(Type.OBJECT, 1));
}
// A multi new array instruction obviously tells us it is an array type !
if (searchPtr.getInstruction() instanceof MULTIANEWARRAY) {
MULTIANEWARRAY ana = (MULTIANEWARRAY) searchPtr.getInstruction();
// Type t = ana.getType(getEnclosingClass().getConstantPool());
// t = new ArrayType(t,ana.getDimensions());
// Just use a standard java.lang.object array - that will work fine
return BcelWorld.fromBcel(new ArrayType(Type.OBJECT, ana.getDimensions()));
}
throw new BCException("Can't determine real target of clone() when processing instruction "
+ searchPtr.getInstruction() + ". Perhaps avoid selecting clone with your pointcut?");
}
return tx;
}
public void ensureInitializedArgVar(int argNumber) {
if (allArgVarsInitialized || (argVars != null && argVars[argNumber] != null)) {
return;
}
InstructionFactory fact = getFactory();
int len = getArgCount();
if (argVars == null) {
argVars = new BcelVar[len];
}
// Need to initialize argument i
int positionOffset = (hasTarget() ? 1 : 0) + ((hasThis() && !getKind().isTargetSameAsThis()) ? 1 : 0);
if (getKind().argsOnStack()) {
// Let's just do them all now since they are on the stack
// we move backwards because we're popping off the stack
for (int i = len - 1; i >= 0; i--) {
UnresolvedType type = getArgType(i);
BcelVar tmp = genTempVar(type, "ajc$arg" + i);
range.insert(tmp.createStore(getFactory()), Range.OutsideBefore);
int position = i;
position += positionOffset;
tmp.setPositionInAroundState(position);
argVars[i] = tmp;
}
allArgVarsInitialized = true;
} else {
int index = 0;
if (arg0HoldsThis()) {
index++;
}
boolean allInited = true;
for (int i = 0; i < len; i++) {
UnresolvedType type = getArgType(i);
if (i == argNumber) {
argVars[argNumber] = genTempVar(type, "ajc$arg" + argNumber);
range.insert(argVars[argNumber].createCopyFrom(fact, index), Range.OutsideBefore);
argVars[argNumber].setPositionInAroundState(argNumber + positionOffset);
}
allInited = allInited && argVars[i] != null;
index += type.getSize();
}
if (allInited && (argNumber + 1) == len) {
allArgVarsInitialized = true;
}
}
}
/**
* Initialize all the available arguments at the shadow. This means creating a copy of them that we can then use for advice
* calls (the copy ensures we are not affected by other advice changing the values). This method initializes all arguments
* whereas the method ensureInitializedArgVar will only ensure a single argument is setup.
*/
public void initializeArgVars() {
if (allArgVarsInitialized) {
return;
}
InstructionFactory fact = getFactory();
int len = getArgCount();
if (argVars == null) {
argVars = new BcelVar[len];
}
int positionOffset = (hasTarget() ? 1 : 0) + ((hasThis() && !getKind().isTargetSameAsThis()) ? 1 : 0);
if (getKind().argsOnStack()) {
// we move backwards because we're popping off the stack
for (int i = len - 1; i >= 0; i--) {
UnresolvedType type = getArgType(i);
BcelVar tmp = genTempVar(type, "ajc$arg" + i);
range.insert(tmp.createStore(getFactory()), Range.OutsideBefore);
int position = i;
position += positionOffset;
tmp.setPositionInAroundState(position);
argVars[i] = tmp;
}
} else {
int index = 0;
if (arg0HoldsThis()) {
index++;
}
for (int i = 0; i < len; i++) {
UnresolvedType type = getArgType(i);
if (argVars[i] == null) {
BcelVar tmp = genTempVar(type, "ajc$arg" + i);
range.insert(tmp.createCopyFrom(fact, index), Range.OutsideBefore);
argVars[i] = tmp;
tmp.setPositionInAroundState(i + positionOffset);
}
index += type.resolve(world).getSize();
}
}
allArgVarsInitialized = true;
}
public void initializeForAroundClosure() {
initializeArgVars();
if (hasTarget()) {
initializeTargetVar();
}
if (hasThis()) {
initializeThisVar();
// System.out.println("initialized: " + this + " thisVar = " + thisVar);
}
}
public void initializeThisAnnotationVars() {
if (thisAnnotationVars != null) {
return;
}
thisAnnotationVars = new HashMap();
// populate..
}
public void initializeTargetAnnotationVars() {
if (targetAnnotationVars != null) {
return;
}
if (getKind().isTargetSameAsThis()) {
if (hasThis()) {
initializeThisAnnotationVars();
}
targetAnnotationVars = thisAnnotationVars;
} else {
targetAnnotationVars = new HashMap();
ResolvedType[] rtx = this.getTargetType().resolve(world).getAnnotationTypes(); // what about annotations we havent
// gotten yet but we will get in
// subclasses?
for (int i = 0; i < rtx.length; i++) {
ResolvedType typeX = rtx[i];
targetAnnotationVars.put(typeX, new TypeAnnotationAccessVar(typeX, (BcelVar) getTargetVar()));
}
// populate.
}
}
// public void initializeArgAnnotationVars() {
// if (argAnnotationVars != null) {
// return;
// }
// int numArgs = getArgCount();
// argAnnotationVars = new Map[numArgs];
// for (int i = 0; i < argAnnotationVars.length; i++) {
// argAnnotationVars[i] = new HashMap();
// // FIXME asc just delete this logic - we always build the Var on demand, as we don't know at weave time
// // what the full set of annotations could be (due to static/dynamic type differences...)
// }
// }
protected ResolvedMember getRelevantMember(ResolvedMember foundMember, Member relevantMember, ResolvedType relevantType) {
if (foundMember != null) {
return foundMember;
}
foundMember = getSignature().resolve(world);
if (foundMember == null && relevantMember != null) {
foundMember = relevantType.lookupMemberWithSupersAndITDs(relevantMember);
}
// check the ITD'd dooberries
List mungers = relevantType.resolve(world).getInterTypeMungers();
for (ConcreteTypeMunger typeMunger : mungers) {
if (typeMunger.getMunger() instanceof NewMethodTypeMunger || typeMunger.getMunger() instanceof NewConstructorTypeMunger) {
ResolvedMember fakerm = typeMunger.getSignature();
if (fakerm.getName().equals(getSignature().getName())
&& fakerm.getParameterSignature().equals(getSignature().getParameterSignature())) {
if (foundMember.getKind() == ResolvedMember.CONSTRUCTOR) {
foundMember = AjcMemberMaker.interConstructor(relevantType, foundMember, typeMunger.getAspectType());
} else {
foundMember = AjcMemberMaker.interMethod(foundMember, typeMunger.getAspectType(), false);
// ResolvedMember o = AjcMemberMaker.interMethodBody(fakerm, typeMunger.getAspectType());
// // Object os = o.getAnnotations();
// ResolvedMember foundMember2 = findMethod(typeMunger.getAspectType(), o);
// Object os2 = foundMember2.getAnnotations();
// int stop = 1;
// foundMember = foundMember2;
// foundMember = AjcMemberMaker.interMethod(foundMember, typeMunger.getAspectType());
}
// in the above.. what about if it's on an Interface? Can that happen?
// then the last arg of the above should be true
return foundMember;
}
}
}
return foundMember;
}
protected ResolvedType[] getAnnotations(ResolvedMember foundMember, Member relevantMember, ResolvedType relevantType) {
if (foundMember == null) {
// check the ITD'd dooberries
List mungers = relevantType.resolve(world).getInterTypeMungers();
for (Iterator iter = mungers.iterator(); iter.hasNext();) {
Object munger = iter.next();
ConcreteTypeMunger typeMunger = (ConcreteTypeMunger) munger;
if (typeMunger.getMunger() instanceof NewMethodTypeMunger
|| typeMunger.getMunger() instanceof NewConstructorTypeMunger) {
ResolvedMember fakerm = typeMunger.getSignature();
// if (fakerm.hasAnnotations())
ResolvedMember ajcMethod = (getSignature().getKind() == ResolvedMember.CONSTRUCTOR ? AjcMemberMaker
.postIntroducedConstructor(typeMunger.getAspectType(), fakerm.getDeclaringType(),
fakerm.getParameterTypes()) : AjcMemberMaker.interMethodDispatcher(fakerm,
typeMunger.getAspectType()));
// AjcMemberMaker.interMethodBody(fakerm,typeMunger.getAspectType()));
ResolvedMember rmm = findMethod(typeMunger.getAspectType(), ajcMethod);
if (fakerm.getName().equals(getSignature().getName())
&& fakerm.getParameterSignature().equals(getSignature().getParameterSignature())) {
relevantType = typeMunger.getAspectType();
foundMember = rmm;
return foundMember.getAnnotationTypes();
}
}
}
// didn't find in ITDs, look in supers
foundMember = relevantType.lookupMemberWithSupersAndITDs(relevantMember);
if (foundMember == null) {
throw new IllegalStateException("Couldn't find member " + relevantMember + " for type " + relevantType);
}
}
return foundMember.getAnnotationTypes();
}
/**
* By determining what "kind" of shadow we are, we can find out the annotations on the appropriate element (method, field,
* constructor, type). Then create one BcelVar entry in the map for each annotation, keyed by annotation type.
*/
public void initializeKindedAnnotationVars() {
if (kindedAnnotationVars != null) {
return;
}
kindedAnnotationVars = new HashMap();
ResolvedType[] annotations = null;
Member shadowSignature = getSignature();
Member annotationHolder = getSignature();
ResolvedType relevantType = shadowSignature.getDeclaringType().resolve(world);
if (relevantType.isRawType() || relevantType.isParameterizedType()) {
relevantType = relevantType.getGenericType();
}
// Determine the annotations that are of interest
if (getKind() == Shadow.StaticInitialization) {
annotations = relevantType.resolve(world).getAnnotationTypes();
} else if (getKind() == Shadow.MethodCall || getKind() == Shadow.ConstructorCall) {
ResolvedMember foundMember = findMethod2(relevantType.resolve(world).getDeclaredMethods(), getSignature());
annotations = getAnnotations(foundMember, shadowSignature, relevantType);
annotationHolder = getRelevantMember(foundMember, shadowSignature, relevantType);
relevantType = annotationHolder.getDeclaringType().resolve(world);
} else if (getKind() == Shadow.FieldSet || getKind() == Shadow.FieldGet) {
annotationHolder = findField(relevantType.getDeclaredFields(), getSignature());
if (annotationHolder == null) {
// check the ITD'd dooberries
List mungers = relevantType.resolve(world).getInterTypeMungers();
for (ConcreteTypeMunger typeMunger : mungers) {
if (typeMunger.getMunger() instanceof NewFieldTypeMunger) {
ResolvedMember fakerm = typeMunger.getSignature();
// if (fakerm.hasAnnotations())
ResolvedMember ajcMethod = AjcMemberMaker.interFieldInitializer(fakerm, typeMunger.getAspectType());
ResolvedMember rmm = findMethod(typeMunger.getAspectType(), ajcMethod);
if (fakerm.equals(getSignature())) {
relevantType = typeMunger.getAspectType();
annotationHolder = rmm;
}
}
}
}
annotations = ((ResolvedMember) annotationHolder).getAnnotationTypes();
} else if (getKind() == Shadow.MethodExecution || getKind() == Shadow.ConstructorExecution
|| getKind() == Shadow.AdviceExecution) {
ResolvedMember foundMember = findMethod2(relevantType.getDeclaredMethods(), getSignature());
annotations = getAnnotations(foundMember, shadowSignature, relevantType);
annotationHolder = getRelevantMember(foundMember, annotationHolder, relevantType);
UnresolvedType ut = annotationHolder.getDeclaringType();
relevantType = ut.resolve(world);
} else if (getKind() == Shadow.ExceptionHandler) {
relevantType = getSignature().getParameterTypes()[0].resolve(world);
annotations = relevantType.getAnnotationTypes();
} else if (getKind() == Shadow.PreInitialization || getKind() == Shadow.Initialization) {
ResolvedMember found = findMethod2(relevantType.getDeclaredMethods(), getSignature());
annotations = found.getAnnotationTypes();
}
if (annotations == null) {
// We can't have recognized the shadow - should blow up now to be on the safe side
throw new BCException("Could not discover annotations for shadow: " + getKind());
}
for (ResolvedType annotationType : annotations) {
AnnotationAccessVar accessVar = new AnnotationAccessVar(this, getKind(), annotationType.resolve(world), relevantType,
annotationHolder, false);
kindedAnnotationVars.put(annotationType, accessVar);
}
}
private ResolvedMember findMethod2(ResolvedMember members[], Member sig) {
String signatureName = sig.getName();
String parameterSignature = sig.getParameterSignature();
for (ResolvedMember member : members) {
if (member.getName().equals(signatureName) && member.getParameterSignature().equals(parameterSignature)) {
return member;
}
}
return null;
}
private ResolvedMember findMethod(ResolvedType aspectType, ResolvedMember ajcMethod) {
ResolvedMember decMethods[] = aspectType.getDeclaredMethods();
for (int i = 0; i < decMethods.length; i++) {
ResolvedMember member = decMethods[i];
if (member.equals(ajcMethod)) {
return member;
}
}
return null;
}
private ResolvedMember findField(ResolvedMember[] members, Member lookingFor) {
for (int i = 0; i < members.length; i++) {
ResolvedMember member = members[i];
if (member.getName().equals(getSignature().getName()) && member.getType().equals(getSignature().getType())) {
return member;
}
}
return null;
}
public void initializeWithinAnnotationVars() {
if (withinAnnotationVars != null) {
return;
}
withinAnnotationVars = new HashMap();
ResolvedType[] annotations = getEnclosingType().resolve(world).getAnnotationTypes();
for (int i = 0; i < annotations.length; i++) {
ResolvedType ann = annotations[i];
Kind k = Shadow.StaticInitialization;
withinAnnotationVars.put(ann, new AnnotationAccessVar(this, k, ann, getEnclosingType(), null, true));
}
}
public void initializeWithinCodeAnnotationVars() {
if (withincodeAnnotationVars != null) {
return;
}
withincodeAnnotationVars = new HashMap();
// For some shadow we are interested in annotations on the method containing that shadow.
ResolvedType[] annotations = getEnclosingMethod().getMemberView().getAnnotationTypes();
for (int i = 0; i < annotations.length; i++) {
ResolvedType ann = annotations[i];
Kind k = (getEnclosingMethod().getMemberView().getKind() == Member.CONSTRUCTOR ? Shadow.ConstructorExecution
: Shadow.MethodExecution);
withincodeAnnotationVars.put(ann, new AnnotationAccessVar(this, k, ann, getEnclosingType(),
getEnclosingCodeSignature(), true));
}
}
// ---- weave methods
void weaveBefore(BcelAdvice munger) {
range.insert(munger.getAdviceInstructions(this, null, range.getRealStart()), Range.InsideBefore);
}
public void weaveAfter(BcelAdvice munger) {
weaveAfterThrowing(munger, UnresolvedType.THROWABLE);
weaveAfterReturning(munger);
}
/**
* The basic strategy here is to add a set of instructions at the end of the shadow range that dispatch the advice, and then
* return whatever the shadow was going to return anyway.
*
* To achieve this, we note all the return statements in the advice, and replace them with code that: 1) stores the return value
* on top of the stack in a temp var 2) jumps to the start of our advice block 3) restores the return value at the end of the
* advice block before ultimately returning
*
* We also need to bind the return value into a returning parameter, if the advice specified one.
*/
public void weaveAfterReturning(BcelAdvice munger) {
List returns = findReturnInstructions();
boolean hasReturnInstructions = !returns.isEmpty();
// list of instructions that handle the actual return from the join point
InstructionList retList = new InstructionList();
// variable that holds the return value
BcelVar returnValueVar = null;
if (hasReturnInstructions) {
returnValueVar = generateReturnInstructions(returns, retList);
} else {
// we need at least one instruction, as the target for jumps
retList.append(InstructionConstants.NOP);
}
// list of instructions for dispatching to the advice itself
InstructionList advice = getAfterReturningAdviceDispatchInstructions(munger, retList.getStart());
if (hasReturnInstructions) {
InstructionHandle gotoTarget = advice.getStart();
for (Iterator i = returns.iterator(); i.hasNext();) {
InstructionHandle ih = i.next();
retargetReturnInstruction(munger.hasExtraParameter(), returnValueVar, gotoTarget, ih);
}
}
range.append(advice);
range.append(retList);
}
/**
* @return a list of all the return instructions in the range of this shadow
*/
private List findReturnInstructions() {
List returns = new ArrayList();
for (InstructionHandle ih = range.getStart(); ih != range.getEnd(); ih = ih.getNext()) {
if (ih.getInstruction().isReturnInstruction()) {
returns.add(ih);
}
}
return returns;
}
/**
* Given a list containing all the return instruction handles for this shadow, finds the last return instruction and copies it,
* making this the ultimate return. If the shadow has a non-void return type, we also create a temporary variable to hold the
* return value, and load the value from this var before returning (see pr148007 for why we do this - it works around a JRockit
* bug, and is also closer to what javac generates)
*
* Sometimes the 'last return' isnt the right one - some rogue code can include the real return from the body of a subroutine
* that exists at the end of the method. In this case the last return is RETURN but that may not be correct for a method with a
* non-void return type... pr151673
*
* @param returns list of all the return instructions in the shadow
* @param returnInstructions instruction list into which the return instructions should be generated
* @return the variable holding the return value, if needed
*/
private BcelVar generateReturnInstructions(List returns, InstructionList returnInstructions) {
BcelVar returnValueVar = null;
if (this.hasANonVoidReturnType()) {
// Find the last *correct* return - this is a method with a non-void return type
// so ignore RETURN
Instruction newReturnInstruction = null;
int i = returns.size() - 1;
while (newReturnInstruction == null && i >= 0) {
InstructionHandle ih = returns.get(i);
if (ih.getInstruction().opcode != Constants.RETURN) {
newReturnInstruction = Utility.copyInstruction(ih.getInstruction());
}
i--;
}
returnValueVar = genTempVar(this.getReturnType());
returnValueVar.appendLoad(returnInstructions, getFactory());
returnInstructions.append(newReturnInstruction);
} else {
InstructionHandle lastReturnHandle = returns.get(returns.size() - 1);
Instruction newReturnInstruction = Utility.copyInstruction(lastReturnHandle.getInstruction());
returnInstructions.append(newReturnInstruction);
}
return returnValueVar;
}
/**
* @return true, iff this shadow returns a value
*/
private boolean hasANonVoidReturnType() {
return !this.getReturnType().equals(UnresolvedType.VOID);
}
/**
* Get the list of instructions used to dispatch to the after advice
*
* @param munger
* @param firstInstructionInReturnSequence
* @return
*/
private InstructionList getAfterReturningAdviceDispatchInstructions(BcelAdvice munger,
InstructionHandle firstInstructionInReturnSequence) {
InstructionList advice = new InstructionList();
BcelVar tempVar = null;
if (munger.hasExtraParameter()) {
tempVar = insertAdviceInstructionsForBindingReturningParameter(advice);
}
advice.append(munger.getAdviceInstructions(this, tempVar, firstInstructionInReturnSequence));
return advice;
}
/**
* If the after() returning(Foo f) form is used, bind the return value to the parameter. If the shadow returns void, bind null.
*
* @param advice
* @return
*/
private BcelVar insertAdviceInstructionsForBindingReturningParameter(InstructionList advice) {
BcelVar tempVar;
UnresolvedType tempVarType = getReturnType();
if (tempVarType.equals(UnresolvedType.VOID)) {
tempVar = genTempVar(UnresolvedType.OBJECT);
advice.append(InstructionConstants.ACONST_NULL);
tempVar.appendStore(advice, getFactory());
} else {
tempVar = genTempVar(tempVarType);
advice.append(InstructionFactory.createDup(tempVarType.getSize()));
tempVar.appendStore(advice, getFactory());
}
return tempVar;
}
/**
* Helper method for weaveAfterReturning
*
* Each return instruction in the method body is retargeted by calling this method. The return instruction is replaced by up to
* three instructions: 1) if the shadow returns a value, and that value is bound to an after returning parameter, then we DUP
* the return value on the top of the stack 2) if the shadow returns a value, we store it in the returnValueVar (it will be
* retrieved from here when we ultimately return after the advice dispatch) 3) if the return was the last instruction, we add a
* NOP (it will fall through to the advice dispatch), otherwise we add a GOTO that branches to the supplied gotoTarget (start of
* the advice dispatch)
*/
private void retargetReturnInstruction(boolean hasReturningParameter, BcelVar returnValueVar, InstructionHandle gotoTarget,
InstructionHandle returnHandle) {
// pr148007, work around JRockit bug
// replace ret with store into returnValueVar, followed by goto if not
// at the end of the instruction list...
InstructionList newInstructions = new InstructionList();
if (returnValueVar != null) {
if (hasReturningParameter) {
// we have to dup the return val before consuming it...
newInstructions.append(InstructionFactory.createDup(this.getReturnType().getSize()));
}
// store the return value into this var
returnValueVar.appendStore(newInstructions, getFactory());
}
if (!isLastInstructionInRange(returnHandle, range)) {
newInstructions.append(InstructionFactory.createBranchInstruction(Constants.GOTO, gotoTarget));
}
if (newInstructions.isEmpty()) {
newInstructions.append(InstructionConstants.NOP);
}
Utility.replaceInstruction(returnHandle, newInstructions, enclosingMethod);
}
private boolean isLastInstructionInRange(InstructionHandle ih, ShadowRange aRange) {
return ih.getNext() == aRange.getEnd();
}
public void weaveAfterThrowing(BcelAdvice munger, UnresolvedType catchType) {
// a good optimization would be not to generate anything here
// if the shadow is GUARANTEED empty (i.e., there's NOTHING, not even
// a shadow, inside me).
if (getRange().getStart().getNext() == getRange().getEnd()) {
return;
}
InstructionFactory fact = getFactory();
InstructionList handler = new InstructionList();
BcelVar exceptionVar = genTempVar(catchType);
exceptionVar.appendStore(handler, fact);
// pr62642
// I will now jump through some firey BCEL hoops to generate a trivial bit of code:
// if (exc instanceof ExceptionInInitializerError)
// throw (ExceptionInInitializerError)exc;
if (this.getEnclosingMethod().getName().equals("")) {
ResolvedType eiieType = world.resolve("java.lang.ExceptionInInitializerError");
ObjectType eiieBcelType = (ObjectType) BcelWorld.makeBcelType(eiieType);
InstructionList ih = new InstructionList(InstructionConstants.NOP);
handler.append(exceptionVar.createLoad(fact));
handler.append(fact.createInstanceOf(eiieBcelType));
InstructionBranch bi = InstructionFactory.createBranchInstruction(Constants.IFEQ, ih.getStart());
handler.append(bi);
handler.append(exceptionVar.createLoad(fact));
handler.append(fact.createCheckCast(eiieBcelType));
handler.append(InstructionConstants.ATHROW);
handler.append(ih);
}
InstructionList endHandler = new InstructionList(exceptionVar.createLoad(fact));
handler.append(munger.getAdviceInstructions(this, exceptionVar, endHandler.getStart()));
handler.append(endHandler);
handler.append(InstructionConstants.ATHROW);
InstructionHandle handlerStart = handler.getStart();
if (isFallsThrough()) {
InstructionHandle jumpTarget = handler.append(InstructionConstants.NOP);
handler.insert(InstructionFactory.createBranchInstruction(Constants.GOTO, jumpTarget));
}
InstructionHandle protectedEnd = handler.getStart();
range.insert(handler, Range.InsideAfter);
enclosingMethod.addExceptionHandler(range.getStart().getNext(), protectedEnd.getPrev(), handlerStart,
(ObjectType) BcelWorld.makeBcelType(catchType), // ???Type.THROWABLE,
// high priority if our args are on the stack
getKind().hasHighPriorityExceptions());
}
// ??? this shares a lot of code with the above weaveAfterThrowing
// ??? would be nice to abstract that to say things only once
public void weaveSoftener(BcelAdvice munger, UnresolvedType catchType) {
// a good optimization would be not to generate anything here
// if the shadow is GUARANTEED empty (i.e., there's NOTHING, not even
// a shadow, inside me).
if (getRange().getStart().getNext() == getRange().getEnd()) {
return;
}
InstructionFactory fact = getFactory();
InstructionList handler = new InstructionList();
InstructionList rtExHandler = new InstructionList();
BcelVar exceptionVar = genTempVar(catchType);
handler.append(fact.createNew(NameMangler.SOFT_EXCEPTION_TYPE));
handler.append(InstructionFactory.createDup(1));
handler.append(exceptionVar.createLoad(fact));
handler.append(fact.createInvoke(NameMangler.SOFT_EXCEPTION_TYPE, "", Type.VOID, new Type[] { Type.THROWABLE },
Constants.INVOKESPECIAL)); // ??? special
handler.append(InstructionConstants.ATHROW);
// ENH 42737
exceptionVar.appendStore(rtExHandler, fact);
// aload_1
rtExHandler.append(exceptionVar.createLoad(fact));
// instanceof class java/lang/RuntimeException
rtExHandler.append(fact.createInstanceOf(new ObjectType("java.lang.RuntimeException")));
// ifeq go to new SOFT_EXCEPTION_TYPE instruction
rtExHandler.append(InstructionFactory.createBranchInstruction(Constants.IFEQ, handler.getStart()));
// aload_1
rtExHandler.append(exceptionVar.createLoad(fact));
// athrow
rtExHandler.append(InstructionFactory.ATHROW);
InstructionHandle handlerStart = rtExHandler.getStart();
if (isFallsThrough()) {
InstructionHandle jumpTarget = range.getEnd();// handler.append(fact.NOP);
rtExHandler.insert(InstructionFactory.createBranchInstruction(Constants.GOTO, jumpTarget));
}
rtExHandler.append(handler);
InstructionHandle protectedEnd = rtExHandler.getStart();
range.insert(rtExHandler, Range.InsideAfter);
enclosingMethod.addExceptionHandler(range.getStart().getNext(), protectedEnd.getPrev(), handlerStart,
(ObjectType) BcelWorld.makeBcelType(catchType),
// high priority if our args are on the stack
getKind().hasHighPriorityExceptions());
}
public void weavePerObjectEntry(final BcelAdvice munger, final BcelVar onVar) {
final InstructionFactory fact = getFactory();
InstructionList entryInstructions = new InstructionList();
InstructionList entrySuccessInstructions = new InstructionList();
onVar.appendLoad(entrySuccessInstructions, fact);
entrySuccessInstructions
.append(Utility.createInvoke(fact, world, AjcMemberMaker.perObjectBind(munger.getConcreteAspect())));
InstructionList testInstructions = munger.getTestInstructions(this, entrySuccessInstructions.getStart(),
range.getRealStart(), entrySuccessInstructions.getStart());
entryInstructions.append(testInstructions);
entryInstructions.append(entrySuccessInstructions);
range.insert(entryInstructions, Range.InsideBefore);
}
// PTWIMPL Create static initializer to call the aspect factory
/**
* Causes the aspect instance to be *set* for later retrievable through localAspectof()/aspectOf()
*/
public void weavePerTypeWithinAspectInitialization(final BcelAdvice munger, UnresolvedType t) {
ResolvedType tResolved = t.resolve(world);
if (tResolved.isInterface()) {
return; // Don't initialize statics in interfaces
}
ResolvedType aspectRT = munger.getConcreteAspect();
BcelWorld.getBcelObjectType(aspectRT);
// Although matched, if the visibility rules prevent the aspect from seeing this type, don't
// insert any code (easier to do it here than try to affect the matching logic, unfortunately)
if (!(tResolved.canBeSeenBy(aspectRT) || aspectRT.isPrivilegedAspect())) {
return;
}
final InstructionFactory fact = getFactory();
InstructionList entryInstructions = new InstructionList();
InstructionList entrySuccessInstructions = new InstructionList();
String aspectname = munger.getConcreteAspect().getName();
String ptwField = NameMangler.perTypeWithinFieldForTarget(munger.getConcreteAspect());
entrySuccessInstructions.append(InstructionFactory.PUSH(fact.getConstantPool(), t.getName()));
entrySuccessInstructions.append(fact.createInvoke(aspectname, "ajc$createAspectInstance", new ObjectType(aspectname),
new Type[] { new ObjectType("java.lang.String") }, Constants.INVOKESTATIC));
entrySuccessInstructions.append(fact.createPutStatic(t.getName(), ptwField, new ObjectType(aspectname)));
entryInstructions.append(entrySuccessInstructions);
range.insert(entryInstructions, Range.InsideBefore);
}
public void weaveCflowEntry(final BcelAdvice munger, final Member cflowField) {
final boolean isPer = munger.getKind() == AdviceKind.PerCflowBelowEntry || munger.getKind() == AdviceKind.PerCflowEntry;
if (!isPer && getKind() == PreInitialization) {
return;
}
final Type objectArrayType = new ArrayType(Type.OBJECT, 1);
final InstructionFactory fact = getFactory();
final BcelVar testResult = genTempVar(UnresolvedType.BOOLEAN);
InstructionList entryInstructions = new InstructionList();
{
InstructionList entrySuccessInstructions = new InstructionList();
if (munger.hasDynamicTests()) {
entryInstructions.append(Utility.createConstant(fact, 0));
testResult.appendStore(entryInstructions, fact);
entrySuccessInstructions.append(Utility.createConstant(fact, 1));
testResult.appendStore(entrySuccessInstructions, fact);
}
if (isPer) {
entrySuccessInstructions.append(fact.createInvoke(munger.getConcreteAspect().getName(),
NameMangler.PERCFLOW_PUSH_METHOD, Type.VOID, new Type[] {}, Constants.INVOKESTATIC));
} else {
BcelVar[] cflowStateVars = munger.getExposedStateAsBcelVars(false);
if (cflowStateVars.length == 0) {
// This should be getting managed by a counter - lets make sure.
if (!cflowField.getType().getName().endsWith("CFlowCounter")) {
throw new RuntimeException("Incorrectly attempting counter operation on stacked cflow");
}
entrySuccessInstructions.append(Utility.createGet(fact, cflowField));
// arrayVar.appendLoad(entrySuccessInstructions, fact);
entrySuccessInstructions.append(fact.createInvoke(NameMangler.CFLOW_COUNTER_TYPE, "inc", Type.VOID,
new Type[] {}, Constants.INVOKEVIRTUAL));
} else {
BcelVar arrayVar = genTempVar(UnresolvedType.OBJECTARRAY);
int alen = cflowStateVars.length;
entrySuccessInstructions.append(Utility.createConstant(fact, alen));
entrySuccessInstructions.append(fact.createNewArray(Type.OBJECT, (short) 1));
arrayVar.appendStore(entrySuccessInstructions, fact);
for (int i = 0; i < alen; i++) {
arrayVar.appendConvertableArrayStore(entrySuccessInstructions, fact, i, cflowStateVars[i]);
}
entrySuccessInstructions.append(Utility.createGet(fact, cflowField));
arrayVar.appendLoad(entrySuccessInstructions, fact);
entrySuccessInstructions.append(fact.createInvoke(NameMangler.CFLOW_STACK_TYPE, "push", Type.VOID,
new Type[] { objectArrayType }, Constants.INVOKEVIRTUAL));
}
}
InstructionList testInstructions = munger.getTestInstructions(this, entrySuccessInstructions.getStart(),
range.getRealStart(), entrySuccessInstructions.getStart());
entryInstructions.append(testInstructions);
entryInstructions.append(entrySuccessInstructions);
}
BcelAdvice exitAdvice = new BcelAdvice(null, null, null, 0, 0, 0, null, munger.getConcreteAspect()) {
@Override
public InstructionList getAdviceInstructions(BcelShadow s, BcelVar extraArgVar, InstructionHandle ifNoAdvice) {
InstructionList exitInstructions = new InstructionList();
if (munger.hasDynamicTests()) {
testResult.appendLoad(exitInstructions, fact);
exitInstructions.append(InstructionFactory.createBranchInstruction(Constants.IFEQ, ifNoAdvice));
}
exitInstructions.append(Utility.createGet(fact, cflowField));
if (munger.getKind() != AdviceKind.PerCflowEntry && munger.getKind() != AdviceKind.PerCflowBelowEntry
&& munger.getExposedStateAsBcelVars(false).length == 0) {
exitInstructions.append(fact.createInvoke(NameMangler.CFLOW_COUNTER_TYPE, "dec", Type.VOID, new Type[] {},
Constants.INVOKEVIRTUAL));
} else {
exitInstructions.append(fact.createInvoke(NameMangler.CFLOW_STACK_TYPE, "pop", Type.VOID, new Type[] {},
Constants.INVOKEVIRTUAL));
}
return exitInstructions;
}
};
// if (getKind() == PreInitialization) {
// weaveAfterReturning(exitAdvice);
// }
// else {
weaveAfter(exitAdvice);
// }
range.insert(entryInstructions, Range.InsideBefore);
}
/*
* Implementation notes:
*
* AroundInline still extracts the instructions of the original shadow into an extracted method. This allows inlining of even
* that advice that doesn't call proceed or calls proceed more than once.
*
* It extracts the instructions of the original shadow into a method.
*
* Then it extracts the instructions of the advice into a new method defined on this enclosing class. This new method can then
* be specialized as below.
*
* Then it searches in the instructions of the advice for any call to the proceed method.
*
* At such a call, there is stuff on the stack representing the arguments to proceed. Pop these into the frame.
*
* Now build the stack for the call to the extracted method, taking values either from the join point state or from the new
* frame locs from proceed. Now call the extracted method. The right return value should be on the stack, so no cast is
* necessary.
*
* If only one call to proceed is made, we can re-inline the original shadow. We are not doing that presently.
*
* If the body of the advice can be determined to not alter the stack, or if this shadow doesn't care about the stack, i.e.
* method-execution, then the new method for the advice can also be re-lined. We are not doing that presently.
*/
public void weaveAroundInline(BcelAdvice munger, boolean hasDynamicTest) {
// !!! THIS BLOCK OF CODE SHOULD BE IN A METHOD CALLED weaveAround(...);
Member mungerSig = munger.getSignature();
// Member originalSig = mungerSig; // If mungerSig is on a parameterized type, originalSig is the member on the generic type
if (mungerSig instanceof ResolvedMember) {
ResolvedMember rm = (ResolvedMember) mungerSig;
if (rm.hasBackingGenericMember()) {
mungerSig = rm.getBackingGenericMember();
}
}
ResolvedType declaringAspectType = world.resolve(mungerSig.getDeclaringType(), true);
if (declaringAspectType.isMissing()) {
world.getLint().cantFindType.signal(
new String[] { WeaverMessages.format(WeaverMessages.CANT_FIND_TYPE_DURING_AROUND_WEAVE,
declaringAspectType.getClassName()) }, getSourceLocation(),
new ISourceLocation[] { munger.getSourceLocation() });
}
// ??? might want some checks here to give better errors
ResolvedType rt = (declaringAspectType.isParameterizedType() ? declaringAspectType.getGenericType() : declaringAspectType);
BcelObjectType ot = BcelWorld.getBcelObjectType(rt);
LazyMethodGen adviceMethod = ot.getLazyClassGen().getLazyMethodGen(mungerSig);
if (!adviceMethod.getCanInline()) {
weaveAroundClosure(munger, hasDynamicTest);
return;
}
// specific test for @AJ proceedInInners
if (isAnnotationStylePassingProceedingJoinPointOutOfAdvice(munger, hasDynamicTest, adviceMethod)) {
return;
}
// We can't inline around methods if they have around advice on them, this
// is because the weaving will extract the body and hence the proceed call.
// TODO should consider optimizations to recognize simple cases that don't require body extraction
enclosingMethod.setCanInline(false);
LazyClassGen shadowClass = getEnclosingClass();
// Extract the shadow into a new method. For example:
// "private static final void method_aroundBody0(M, M, String, org.aspectj.lang.JoinPoint)"
// Parameters are: this if there is one, target if there is one and its different to this, then original arguments
// at the shadow, then tjp
String extractedShadowMethodName = NameMangler.aroundShadowMethodName(getSignature(), shadowClass.getNewGeneratedNameTag());
List parameterNames = new ArrayList();
boolean shadowClassIsInterface = shadowClass.isInterface();
LazyMethodGen extractedShadowMethod = extractShadowInstructionsIntoNewMethod(extractedShadowMethodName,
shadowClassIsInterface?Modifier.PUBLIC:Modifier.PRIVATE,
munger.getSourceLocation(), parameterNames,shadowClassIsInterface);
List argsToCallLocalAdviceMethodWith = new ArrayList();
List proceedVarList = new ArrayList();
int extraParamOffset = 0;
// Create the extra parameters that are needed for passing to proceed
// This code is very similar to that found in makeCallToCallback and should
// be rationalized in the future
if (thisVar != null) {
argsToCallLocalAdviceMethodWith.add(thisVar);
proceedVarList.add(new BcelVar(thisVar.getType(), extraParamOffset));
extraParamOffset += thisVar.getType().getSize();
}
if (targetVar != null && targetVar != thisVar) {
argsToCallLocalAdviceMethodWith.add(targetVar);
proceedVarList.add(new BcelVar(targetVar.getType(), extraParamOffset));
extraParamOffset += targetVar.getType().getSize();
}
for (int i = 0, len = getArgCount(); i < len; i++) {
argsToCallLocalAdviceMethodWith.add(argVars[i]);
proceedVarList.add(new BcelVar(argVars[i].getType(), extraParamOffset));
extraParamOffset += argVars[i].getType().getSize();
}
if (thisJoinPointVar != null) {
argsToCallLocalAdviceMethodWith.add(thisJoinPointVar);
proceedVarList.add(new BcelVar(thisJoinPointVar.getType(), extraParamOffset));
extraParamOffset += thisJoinPointVar.getType().getSize();
}
// We use the munger signature here because it allows for any parameterization of the mungers pointcut that
// may have occurred ie. if the pointcut is p(T t) in the super aspect and that has become p(Foo t) in the sub aspect
// then here the munger signature will have 'Foo' as an argument in it whilst the adviceMethod argument type will be
// 'Object' - since it represents the advice method in the superaspect which uses the erasure of the type variable p(Object
// t) - see pr174449.
Type[] adviceParameterTypes = BcelWorld.makeBcelTypes(munger.getSignature().getParameterTypes());
// forces initialization ... dont like this but seems to be required for some tests to pass, I think that means there
// is a LazyMethodGen method that is not correctly setup to call initialize() when it is invoked - but I dont have
// time right now to discover which
adviceMethod.getArgumentTypes();
Type[] extractedMethodParameterTypes = extractedShadowMethod.getArgumentTypes();
Type[] parameterTypes = new Type[extractedMethodParameterTypes.length + adviceParameterTypes.length + 1];
int parameterIndex = 0;
System.arraycopy(extractedMethodParameterTypes, 0, parameterTypes, parameterIndex, extractedMethodParameterTypes.length);
parameterIndex += extractedMethodParameterTypes.length;
parameterTypes[parameterIndex++] = BcelWorld.makeBcelType(adviceMethod.getEnclosingClass().getType());
System.arraycopy(adviceParameterTypes, 0, parameterTypes, parameterIndex, adviceParameterTypes.length);
// Extract the advice into a new method. This will go in the same type as the shadow
// name will be something like foo_aroundBody1$advice
String localAdviceMethodName = NameMangler.aroundAdviceMethodName(getSignature(), shadowClass.getNewGeneratedNameTag());
int localAdviceMethodModifiers = Modifier.PRIVATE | (world.useFinal() & !shadowClassIsInterface ? Modifier.FINAL : 0) | Modifier.STATIC;
LazyMethodGen localAdviceMethod = new LazyMethodGen(localAdviceMethodModifiers, BcelWorld.makeBcelType(mungerSig.getReturnType()), localAdviceMethodName, parameterTypes,
NoDeclaredExceptions, shadowClass);
// Doesnt work properly, so leave it out:
// String aspectFilename = adviceMethod.getEnclosingClass().getInternalFileName();
// String shadowFilename = shadowClass.getInternalFileName();
// if (!aspectFilename.equals(shadowFilename)) {
// localAdviceMethod.fromFilename = aspectFilename;
// shadowClass.addInlinedSourceFileInfo(aspectFilename, adviceMethod.highestLineNumber);
// }
shadowClass.addMethodGen(localAdviceMethod);
// create a map that will move all slots in advice method forward by extraParamOffset
// in order to make room for the new proceed-required arguments that are added at
// the beginning of the parameter list
int nVars = adviceMethod.getMaxLocals() + extraParamOffset;
IntMap varMap = IntMap.idMap(nVars);
for (int i = extraParamOffset; i < nVars; i++) {
varMap.put(i - extraParamOffset, i);
}
final InstructionFactory fact = getFactory();
localAdviceMethod.getBody().insert(
BcelClassWeaver.genInlineInstructions(adviceMethod, localAdviceMethod, varMap, fact, true));
localAdviceMethod.setMaxLocals(nVars);
// the shadow is now empty. First, create a correct call
// to the around advice. This includes both the call (which may involve
// value conversion of the advice arguments) and the return
// (which may involve value conversion of the return value). Right now
// we push a null for the unused closure. It's sad, but there it is.
InstructionList advice = new InstructionList();
// InstructionHandle adviceMethodInvocation;
{
for (Iterator i = argsToCallLocalAdviceMethodWith.iterator(); i.hasNext();) {
BcelVar var = i.next();
var.appendLoad(advice, fact);
}
// ??? we don't actually need to push NULL for the closure if we take care
boolean isAnnoStyleConcreteAspect = munger.getConcreteAspect().isAnnotationStyleAspect();
boolean isAnnoStyleDeclaringAspect = munger.getDeclaringAspect() != null ? munger.getDeclaringAspect().resolve(world)
.isAnnotationStyleAspect() : false;
InstructionList iList = null;
if (isAnnoStyleConcreteAspect && isAnnoStyleDeclaringAspect) {
iList = this.loadThisJoinPoint();
iList.append(Utility.createConversion(getFactory(), LazyClassGen.tjpType, LazyClassGen.proceedingTjpType));
} else {
iList = new InstructionList(InstructionConstants.ACONST_NULL);
}
advice.append(munger.getAdviceArgSetup(this, null, iList));
// adviceMethodInvocation =
advice.append(Utility.createInvoke(fact, localAdviceMethod)); // (fact, getWorld(), munger.getSignature()));
advice.append(Utility.createConversion(getFactory(), BcelWorld.makeBcelType(mungerSig.getReturnType()),
extractedShadowMethod.getReturnType(), world.isInJava5Mode()));
if (!isFallsThrough()) {
advice.append(InstructionFactory.createReturn(extractedShadowMethod.getReturnType()));
}
}
// now, situate the call inside the possible dynamic tests,
// and actually add the whole mess to the shadow
if (!hasDynamicTest) {
range.append(advice);
} else {
InstructionList afterThingie = new InstructionList(InstructionConstants.NOP);
InstructionList callback = makeCallToCallback(extractedShadowMethod);
if (terminatesWithReturn()) {
callback.append(InstructionFactory.createReturn(extractedShadowMethod.getReturnType()));
} else {
// InstructionHandle endNop = range.insert(fact.NOP, Range.InsideAfter);
advice.append(InstructionFactory.createBranchInstruction(Constants.GOTO, afterThingie.getStart()));
}
range.append(munger.getTestInstructions(this, advice.getStart(), callback.getStart(), advice.getStart()));
range.append(advice);
range.append(callback);
range.append(afterThingie);
}
// now search through the advice, looking for a call to PROCEED.
// Then we replace the call to proceed with some argument setup, and a
// call to the extracted method.
// inlining support for code style aspects
if (!munger.getDeclaringType().isAnnotationStyleAspect()) {
String proceedName = NameMangler.proceedMethodName(munger.getSignature().getName());
InstructionHandle curr = localAdviceMethod.getBody().getStart();
InstructionHandle end = localAdviceMethod.getBody().getEnd();
ConstantPool cpg = localAdviceMethod.getEnclosingClass().getConstantPool();
while (curr != end) {
InstructionHandle next = curr.getNext();
Instruction inst = curr.getInstruction();
if ((inst.opcode == Constants.INVOKESTATIC) && proceedName.equals(((InvokeInstruction) inst).getMethodName(cpg))) {
localAdviceMethod.getBody().append(curr,
getRedoneProceedCall(fact, extractedShadowMethod, munger, localAdviceMethod, proceedVarList));
Utility.deleteInstruction(curr, localAdviceMethod);
}
curr = next;
}
// and that's it.
} else {
// ATAJ inlining support for @AJ aspects
// [TODO document @AJ code rule: don't manipulate 2 jps proceed at the same time.. in an advice body]
InstructionHandle curr = localAdviceMethod.getBody().getStart();
InstructionHandle end = localAdviceMethod.getBody().getEnd();
ConstantPool cpg = localAdviceMethod.getEnclosingClass().getConstantPool();
while (curr != end) {
InstructionHandle next = curr.getNext();
Instruction inst = curr.getInstruction();
if ((inst instanceof INVOKEINTERFACE) && "proceed".equals(((INVOKEINTERFACE) inst).getMethodName(cpg))) {
final boolean isProceedWithArgs;
if (((INVOKEINTERFACE) inst).getArgumentTypes(cpg).length == 1) {
// proceed with args as a boxed Object[]
isProceedWithArgs = true;
} else {
isProceedWithArgs = false;
}
InstructionList insteadProceedIl = getRedoneProceedCallForAnnotationStyle(fact, extractedShadowMethod, munger,
localAdviceMethod, proceedVarList, isProceedWithArgs);
localAdviceMethod.getBody().append(curr, insteadProceedIl);
Utility.deleteInstruction(curr, localAdviceMethod);
}
curr = next;
}
}
// if (parameterNames.size() == 0) {
// On return we have inserted the advice body into the local advice method. We have remapped all the local variables
// that were referenced in the advice as we did the copy, and so the local variable table for localAdviceMethod is
// now lacking any information about all the initial variables.
InstructionHandle start = localAdviceMethod.getBody().getStart();
InstructionHandle end = localAdviceMethod.getBody().getEnd();
// Find the real start and end
while (start.getInstruction().opcode == Constants.IMPDEP1) {
start = start.getNext();
}
while (end.getInstruction().opcode == Constants.IMPDEP1) {
end = end.getPrev();
}
Type[] args = localAdviceMethod.getArgumentTypes();
int argNumber = 0;
for (int slot = 0; slot < extraParamOffset; argNumber++) { // slot will increase by the argument size each time
String argumentName = null;
if (argNumber >= args.length || parameterNames.size() == 0 || argNumber >= parameterNames.size()) {
// this should be unnecessary as I think all known joinpoints and helper methods
// propagate the parameter names around correctly - but just in case let us do this
// rather than fail. If a bug is raised reporting unknown as a local variable name
// then investigate the joinpoint giving rise to the ResolvedMember and why it has
// no parameter names specified
argumentName = new StringBuffer("unknown").append(argNumber).toString();
} else {
argumentName = parameterNames.get(argNumber);
}
String argumentSignature = args[argNumber].getSignature();
LocalVariableTag lvt = new LocalVariableTag(argumentSignature, argumentName, slot, 0);
start.addTargeter(lvt);
end.addTargeter(lvt);
slot += args[argNumber].getSize();
}
}
/**
* Check if the advice method passes a pjp parameter out via an invoke instruction - if so we can't risk inlining.
*/
private boolean isAnnotationStylePassingProceedingJoinPointOutOfAdvice(BcelAdvice munger, boolean hasDynamicTest,
LazyMethodGen adviceMethod) {
if (munger.getConcreteAspect().isAnnotationStyleAspect()) {
// if we can't find one proceed() we suspect that the call
// is happening in an inner class so we don't inline it.
// Note: for code style, this is done at Aspect compilation time.
boolean canSeeProceedPassedToOther = false;
InstructionHandle curr = adviceMethod.getBody().getStart();
InstructionHandle end = adviceMethod.getBody().getEnd();
ConstantPool cpg = adviceMethod.getEnclosingClass().getConstantPool();
while (curr != end) {
InstructionHandle next = curr.getNext();
Instruction inst = curr.getInstruction();
if ((inst instanceof InvokeInstruction)
&& ((InvokeInstruction) inst).getSignature(cpg).indexOf("Lorg/aspectj/lang/ProceedingJoinPoint;") > 0) {
// we may want to refine to exclude stuff returning jp ?
// does code style skip inline if i write dump(thisJoinPoint) ?
canSeeProceedPassedToOther = true;// we see one pjp passed around - dangerous
break;
}
curr = next;
}
if (canSeeProceedPassedToOther) {
// remember this decision to avoid re-analysis
adviceMethod.setCanInline(false);
weaveAroundClosure(munger, hasDynamicTest);
return true;
}
}
return false;
}
private InstructionList getRedoneProceedCall(InstructionFactory fact, LazyMethodGen callbackMethod, BcelAdvice munger,
LazyMethodGen localAdviceMethod, List argVarList) {
InstructionList ret = new InstructionList();
// we have on stack all the arguments for the ADVICE call.
// we have in frame somewhere all the arguments for the non-advice call.
BcelVar[] adviceVars = munger.getExposedStateAsBcelVars(true);
IntMap proceedMap = makeProceedArgumentMap(adviceVars);
// System.out.println(proceedMap + " for " + this);
// System.out.println(argVarList);
ResolvedType[] proceedParamTypes = world.resolve(munger.getSignature().getParameterTypes());
// remove this*JoinPoint* as arguments to proceed
if (munger.getBaseParameterCount() + 1 < proceedParamTypes.length) {
int len = munger.getBaseParameterCount() + 1;
ResolvedType[] newTypes = new ResolvedType[len];
System.arraycopy(proceedParamTypes, 0, newTypes, 0, len);
proceedParamTypes = newTypes;
}
// System.out.println("stateTypes: " + Arrays.asList(stateTypes));
BcelVar[] proceedVars = Utility.pushAndReturnArrayOfVars(proceedParamTypes, ret, fact, localAdviceMethod);
Type[] stateTypes = callbackMethod.getArgumentTypes();
// System.out.println("stateTypes: " + Arrays.asList(stateTypes));
for (int i = 0, len = stateTypes.length; i < len; i++) {
Type stateType = stateTypes[i];
ResolvedType stateTypeX = BcelWorld.fromBcel(stateType).resolve(world);
if (proceedMap.hasKey(i)) {
// throw new RuntimeException("unimplemented");
proceedVars[proceedMap.get(i)].appendLoadAndConvert(ret, fact, stateTypeX);
} else {
argVarList.get(i).appendLoad(ret, fact);
}
}
ret.append(Utility.createInvoke(fact, callbackMethod));
ret.append(Utility.createConversion(fact, callbackMethod.getReturnType(),
BcelWorld.makeBcelType(munger.getSignature().getReturnType()), world.isInJava5Mode()));
return ret;
}
// private static boolean bindsThisOrTarget(Pointcut pointcut) {
// ThisTargetFinder visitor = new ThisTargetFinder();
// pointcut.accept(visitor, null);
// return visitor.bindsThisOrTarget;
// }
// private static class ThisTargetFinder extends IdentityPointcutVisitor {
// boolean bindsThisOrTarget = false;
//
// public Object visit(ThisOrTargetPointcut node, Object data) {
// if (node.isBinding()) {
// bindsThisOrTarget = true;
// }
// return node;
// }
//
// public Object visit(AndPointcut node, Object data) {
// if (!bindsThisOrTarget) node.getLeft().accept(this, data);
// if (!bindsThisOrTarget) node.getRight().accept(this, data);
// return node;
// }
//
// public Object visit(NotPointcut node, Object data) {
// if (!bindsThisOrTarget) node.getNegatedPointcut().accept(this, data);
// return node;
// }
//
// public Object visit(OrPointcut node, Object data) {
// if (!bindsThisOrTarget) node.getLeft().accept(this, data);
// if (!bindsThisOrTarget) node.getRight().accept(this, data);
// return node;
// }
// }
/**
* Annotation style handling for inlining.
*
* Note: The proceedingjoinpoint is already on the stack (since the user was calling pjp.proceed(...)
*
* The proceed map is ignored (in terms of argument repositioning) since we have a fixed expected format for annotation style.
* The aim here is to change the proceed() call into a call to the xxx_aroundBody0 method.
*
*
*/
private InstructionList getRedoneProceedCallForAnnotationStyle(InstructionFactory fact, LazyMethodGen callbackMethod,
BcelAdvice munger, LazyMethodGen localAdviceMethod, List argVarList, boolean isProceedWithArgs) {
InstructionList ret = new InstructionList();
// store the Object[] array on stack if proceed with args
if (isProceedWithArgs) {
// STORE the Object[] into a local variable
Type objectArrayType = Type.OBJECT_ARRAY;
int theObjectArrayLocalNumber = localAdviceMethod.allocateLocal(objectArrayType);
ret.append(InstructionFactory.createStore(objectArrayType, theObjectArrayLocalNumber));
// STORE the ProceedingJoinPoint instance into a local variable
Type proceedingJpType = Type.getType("Lorg/aspectj/lang/ProceedingJoinPoint;");
int pjpLocalNumber = localAdviceMethod.allocateLocal(proceedingJpType);
ret.append(InstructionFactory.createStore(proceedingJpType, pjpLocalNumber));
// Aim here initially is to determine whether the user will have provided a new
// this/target in the object array and consume them if they have, leaving us the rest of
// the arguments to process as regular arguments to the invocation at the original join point
boolean pointcutBindsThis = bindsThis(munger);
boolean pointcutBindsTarget = bindsTarget(munger);
boolean targetIsSameAsThis = getKind().isTargetSameAsThis();
int nextArgumentToProvideForCallback = 0;
if (hasThis()) {
if (!(pointcutBindsTarget && targetIsSameAsThis)) {
if (pointcutBindsThis) {
// they have supplied new this as first entry in object array, consume it
ret.append(InstructionFactory.createLoad(objectArrayType, theObjectArrayLocalNumber));
ret.append(Utility.createConstant(fact, 0));
ret.append(InstructionFactory.createArrayLoad(Type.OBJECT));
ret.append(Utility.createConversion(fact, Type.OBJECT, callbackMethod.getArgumentTypes()[0]));
} else {
// use local variable 0
ret.append(InstructionFactory.createALOAD(0));
}
nextArgumentToProvideForCallback++;
}
}
if (hasTarget()) {
if (pointcutBindsTarget) {
if (getKind().isTargetSameAsThis()) {
ret.append(InstructionFactory.createLoad(objectArrayType, theObjectArrayLocalNumber));
ret.append(Utility.createConstant(fact, pointcutBindsThis ? 1 : 0));
ret.append(InstructionFactory.createArrayLoad(Type.OBJECT));
ret.append(Utility.createConversion(fact, Type.OBJECT, callbackMethod.getArgumentTypes()[0]));
} else {
int position = (hasThis() && pointcutBindsThis)? 1 : 0;
ret.append(InstructionFactory.createLoad(objectArrayType, theObjectArrayLocalNumber));
ret.append(Utility.createConstant(fact, position));
ret.append(InstructionFactory.createArrayLoad(Type.OBJECT));
ret.append(Utility.createConversion(fact, Type.OBJECT, callbackMethod.getArgumentTypes()[nextArgumentToProvideForCallback]));
}
nextArgumentToProvideForCallback++;
} else {
if (getKind().isTargetSameAsThis()) {
// ret.append(new ALOAD(0));
} else {
ret.append(InstructionFactory.createLoad(localAdviceMethod.getArgumentTypes()[0], hasThis() ? 1 : 0));
nextArgumentToProvideForCallback++;
}
}
}
// Where to start in the object array in order to pick up arguments
int indexIntoObjectArrayForArguments = (pointcutBindsThis ? 1 : 0) + (pointcutBindsTarget ? 1 : 0);
int len = callbackMethod.getArgumentTypes().length;
for (int i = nextArgumentToProvideForCallback; i < len; i++) {
Type stateType = callbackMethod.getArgumentTypes()[i];
BcelWorld.fromBcel(stateType).resolve(world);
if ("Lorg/aspectj/lang/JoinPoint;".equals(stateType.getSignature())) {
ret.append(new InstructionLV(Constants.ALOAD, pjpLocalNumber));
} else {
ret.append(InstructionFactory.createLoad(objectArrayType, theObjectArrayLocalNumber));
ret.append(Utility
.createConstant(fact, i - nextArgumentToProvideForCallback + indexIntoObjectArrayForArguments));
ret.append(InstructionFactory.createArrayLoad(Type.OBJECT));
ret.append(Utility.createConversion(fact, Type.OBJECT, stateType));
}
}
} else {
Type proceedingJpType = Type.getType("Lorg/aspectj/lang/ProceedingJoinPoint;");
int localJp = localAdviceMethod.allocateLocal(proceedingJpType);
ret.append(InstructionFactory.createStore(proceedingJpType, localJp));
int idx = 0;
for (int i = 0, len = callbackMethod.getArgumentTypes().length; i < len; i++) {
Type stateType = callbackMethod.getArgumentTypes()[i];
/* ResolvedType stateTypeX = */
BcelWorld.fromBcel(stateType).resolve(world);
if ("Lorg/aspectj/lang/JoinPoint;".equals(stateType.getSignature())) {
ret.append(InstructionFactory.createALOAD(localJp));// from localAdvice signature
// } else if ("Lorg/aspectj/lang/ProceedingJoinPoint;".equals(stateType.getSignature())) {
// //FIXME ALEX?
// ret.append(new ALOAD(localJp));// from localAdvice signature
// // ret.append(fact.createCheckCast(
// // (ReferenceType) BcelWorld.makeBcelType(stateTypeX)
// // ));
// // cast ?
//
idx++;
} else {
ret.append(InstructionFactory.createLoad(stateType, idx));
idx += stateType.getSize();
}
}
}
// do the callback invoke
ret.append(Utility.createInvoke(fact, callbackMethod));
// box it again. Handles cases where around advice does return something else than Object
if (!UnresolvedType.OBJECT.equals(munger.getSignature().getReturnType())) {
ret.append(Utility.createConversion(fact, callbackMethod.getReturnType(), Type.OBJECT));
}
ret.append(Utility.createConversion(fact, callbackMethod.getReturnType(),
BcelWorld.makeBcelType(munger.getSignature().getReturnType()), world.isInJava5Mode()));
return ret;
//
//
//
// if (proceedMap.hasKey(i)) {
// ret.append(new ALOAD(i));
// //throw new RuntimeException("unimplemented");
// //proceedVars[proceedMap.get(i)].appendLoadAndConvert(ret, fact, stateTypeX);
// } else {
// //((BcelVar) argVarList.get(i)).appendLoad(ret, fact);
// //ret.append(new ALOAD(i));
// if ("Lorg/aspectj/lang/JoinPoint;".equals(stateType.getSignature())) {
// ret.append(new ALOAD(i));
// } else {
// ret.append(new ALOAD(i));
// }
// }
// }
//
// ret.append(Utility.createInvoke(fact, callbackMethod));
// ret.append(Utility.createConversion(fact, callbackMethod.getReturnType(),
// BcelWorld.makeBcelType(munger.getSignature().getReturnType())));
//
// //ret.append(new ACONST_NULL());//will be POPed
// if (true) return ret;
//
//
//
// // we have on stack all the arguments for the ADVICE call.
// // we have in frame somewhere all the arguments for the non-advice call.
//
// BcelVar[] adviceVars = munger.getExposedStateAsBcelVars();
// IntMap proceedMap = makeProceedArgumentMap(adviceVars);
//
// System.out.println(proceedMap + " for " + this);
// System.out.println(argVarList);
//
// ResolvedType[] proceedParamTypes =
// world.resolve(munger.getSignature().getParameterTypes());
// // remove this*JoinPoint* as arguments to proceed
// if (munger.getBaseParameterCount()+1 < proceedParamTypes.length) {
// int len = munger.getBaseParameterCount()+1;
// ResolvedType[] newTypes = new ResolvedType[len];
// System.arraycopy(proceedParamTypes, 0, newTypes, 0, len);
// proceedParamTypes = newTypes;
// }
//
// //System.out.println("stateTypes: " + Arrays.asList(stateTypes));
// BcelVar[] proceedVars =
// Utility.pushAndReturnArrayOfVars(proceedParamTypes, ret, fact, localAdviceMethod);
//
// Type[] stateTypes = callbackMethod.getArgumentTypes();
// // System.out.println("stateTypes: " + Arrays.asList(stateTypes));
//
// for (int i=0, len=stateTypes.length; i < len; i++) {
// Type stateType = stateTypes[i];
// ResolvedType stateTypeX = BcelWorld.fromBcel(stateType).resolve(world);
// if (proceedMap.hasKey(i)) {
// //throw new RuntimeException("unimplemented");
// proceedVars[proceedMap.get(i)].appendLoadAndConvert(ret, fact, stateTypeX);
// } else {
// ((BcelVar) argVarList.get(i)).appendLoad(ret, fact);
// }
// }
//
// ret.append(Utility.createInvoke(fact, callbackMethod));
// ret.append(Utility.createConversion(fact, callbackMethod.getReturnType(),
// BcelWorld.makeBcelType(munger.getSignature().getReturnType())));
// return ret;
}
private boolean bindsThis(BcelAdvice munger) {
UsesThisVisitor utv = new UsesThisVisitor();
munger.getPointcut().accept(utv, null);
return utv.usesThis;
}
private boolean bindsTarget(BcelAdvice munger) {
UsesTargetVisitor utv = new UsesTargetVisitor();
munger.getPointcut().accept(utv, null);
return utv.usesTarget;
}
private static class UsesThisVisitor extends AbstractPatternNodeVisitor {
boolean usesThis = false;
@Override
public Object visit(ThisOrTargetPointcut node, Object data) {
if (node.isThis() && node.isBinding()) {
usesThis = true;
}
return node;
}
@Override
public Object visit(AndPointcut node, Object data) {
if (!usesThis) {
node.getLeft().accept(this, data);
}
if (!usesThis) {
node.getRight().accept(this, data);
}
return node;
}
@Override
public Object visit(NotPointcut node, Object data) {
if (!usesThis) {
node.getNegatedPointcut().accept(this, data);
}
return node;
}
@Override
public Object visit(OrPointcut node, Object data) {
if (!usesThis) {
node.getLeft().accept(this, data);
}
if (!usesThis) {
node.getRight().accept(this, data);
}
return node;
}
}
private static class UsesTargetVisitor extends AbstractPatternNodeVisitor {
boolean usesTarget = false;
@Override
public Object visit(ThisOrTargetPointcut node, Object data) {
if (!node.isThis() && node.isBinding()) {
usesTarget = true;
}
return node;
}
@Override
public Object visit(AndPointcut node, Object data) {
if (!usesTarget) {
node.getLeft().accept(this, data);
}
if (!usesTarget) {
node.getRight().accept(this, data);
}
return node;
}
@Override
public Object visit(NotPointcut node, Object data) {
if (!usesTarget) {
node.getNegatedPointcut().accept(this, data);
}
return node;
}
@Override
public Object visit(OrPointcut node, Object data) {
if (!usesTarget) {
node.getLeft().accept(this, data);
}
if (!usesTarget) {
node.getRight().accept(this, data);
}
return node;
}
}
public void weaveAroundClosure(BcelAdvice munger, boolean hasDynamicTest) {
InstructionFactory fact = getFactory();
enclosingMethod.setCanInline(false);
int linenumber = getSourceLine();
// MOVE OUT ALL THE INSTRUCTIONS IN MY SHADOW INTO ANOTHER METHOD!
// callbackMethod will be something like: "static final void m_aroundBody0(I)"
boolean shadowClassIsInterface = getEnclosingClass().isInterface();
LazyMethodGen callbackMethod = extractShadowInstructionsIntoNewMethod(
NameMangler.aroundShadowMethodName(getSignature(), getEnclosingClass().getNewGeneratedNameTag()), shadowClassIsInterface?Modifier.PUBLIC:0,
munger.getSourceLocation(), new ArrayList(),shadowClassIsInterface);
BcelVar[] adviceVars = munger.getExposedStateAsBcelVars(true);
String closureClassName = NameMangler.makeClosureClassName(getEnclosingClass().getType(), getEnclosingClass()
.getNewGeneratedNameTag());
Member constructorSig = new MemberImpl(Member.CONSTRUCTOR, UnresolvedType.forName(closureClassName), 0, "",
"([Ljava/lang/Object;)V");
BcelVar closureHolder = null;
// This is not being used currently since getKind() == preinitializaiton
// cannot happen in around advice
if (getKind() == PreInitialization) {
closureHolder = genTempVar(AjcMemberMaker.AROUND_CLOSURE_TYPE);
}
InstructionList closureInstantiation = makeClosureInstantiation(constructorSig, closureHolder);
/* LazyMethodGen constructor = */
makeClosureClassAndReturnConstructor(closureClassName, callbackMethod, makeProceedArgumentMap(adviceVars));
InstructionList returnConversionCode;
if (getKind() == PreInitialization) {
returnConversionCode = new InstructionList();
BcelVar stateTempVar = genTempVar(UnresolvedType.OBJECTARRAY);
closureHolder.appendLoad(returnConversionCode, fact);
returnConversionCode.append(Utility.createInvoke(fact, world, AjcMemberMaker.aroundClosurePreInitializationGetter()));
stateTempVar.appendStore(returnConversionCode, fact);
Type[] stateTypes = getSuperConstructorParameterTypes();
returnConversionCode.append(InstructionConstants.ALOAD_0); // put "this" back on the stack
for (int i = 0, len = stateTypes.length; i < len; i++) {
UnresolvedType bcelTX = BcelWorld.fromBcel(stateTypes[i]);
ResolvedType stateRTX = world.resolve(bcelTX, true);
if (stateRTX.isMissing()) {
world.getLint().cantFindType.signal(
new String[] { WeaverMessages.format(WeaverMessages.CANT_FIND_TYPE_DURING_AROUND_WEAVE_PREINIT,
bcelTX.getClassName()) }, getSourceLocation(),
new ISourceLocation[] { munger.getSourceLocation() });
// IMessage msg = new Message(
// WeaverMessages.format(WeaverMessages.CANT_FIND_TYPE_DURING_AROUND_WEAVE_PREINIT,bcelTX.getClassName()),
// "",IMessage.ERROR,getSourceLocation(),null,
// new ISourceLocation[]{ munger.getSourceLocation()});
// world.getMessageHandler().handleMessage(msg);
}
stateTempVar.appendConvertableArrayLoad(returnConversionCode, fact, i, stateRTX);
}
} else {
// pr226201
Member mungerSignature = munger.getSignature();
if (munger.getSignature() instanceof ResolvedMember) {
if (((ResolvedMember) mungerSignature).hasBackingGenericMember()) {
mungerSignature = ((ResolvedMember) mungerSignature).getBackingGenericMember();
}
}
UnresolvedType returnType = mungerSignature.getReturnType();
returnConversionCode = Utility.createConversion(getFactory(), BcelWorld.makeBcelType(returnType),
callbackMethod.getReturnType(), world.isInJava5Mode());
if (!isFallsThrough()) {
returnConversionCode.append(InstructionFactory.createReturn(callbackMethod.getReturnType()));
}
}
// initialize the bit flags for this shadow
int bitflags = 0x000000;
if (getKind().isTargetSameAsThis()) {
bitflags |= 0x010000;
}
if (hasThis()) {
bitflags |= 0x001000;
}
if (bindsThis(munger)) {
bitflags |= 0x000100;
}
if (hasTarget()) {
bitflags |= 0x000010;
}
if (bindsTarget(munger)) {
bitflags |= 0x000001;
}
// ATAJ for @AJ aspect we need to link the closure with the joinpoint instance
if (munger.getConcreteAspect() != null && munger.getConcreteAspect().isAnnotationStyleAspect()
&& munger.getDeclaringAspect() != null && munger.getDeclaringAspect().resolve(world).isAnnotationStyleAspect()) {
// stick the bitflags on the stack and call the variant of linkClosureAndJoinPoint that takes an int
closureInstantiation.append(fact.createConstant(Integer.valueOf(bitflags)));
closureInstantiation.append(Utility.createInvoke(getFactory(), getWorld(),
new MemberImpl(Member.METHOD, UnresolvedType.forName("org.aspectj.runtime.internal.AroundClosure"),
Modifier.PUBLIC, "linkClosureAndJoinPoint", String.format("%s%s", "(I)", "Lorg/aspectj/lang/ProceedingJoinPoint;"))));
}
InstructionList advice = new InstructionList();
advice.append(munger.getAdviceArgSetup(this, null, closureInstantiation));
// invoke the advice
advice.append(munger.getNonTestAdviceInstructions(this));
advice.append(returnConversionCode);
if (getKind() == Shadow.MethodExecution && linenumber > 0) {
advice.getStart().addTargeter(new LineNumberTag(linenumber));
}
if (!hasDynamicTest) {
range.append(advice);
} else {
InstructionList callback = makeCallToCallback(callbackMethod);
InstructionList postCallback = new InstructionList();
if (terminatesWithReturn()) {
callback.append(InstructionFactory.createReturn(callbackMethod.getReturnType()));
} else {
advice.append(InstructionFactory.createBranchInstruction(Constants.GOTO,
postCallback.append(InstructionConstants.NOP)));
}
range.append(munger.getTestInstructions(this, advice.getStart(), callback.getStart(), advice.getStart()));
range.append(advice);
range.append(callback);
range.append(postCallback);
}
}
// exposed for testing
InstructionList makeCallToCallback(LazyMethodGen callbackMethod) {
InstructionFactory fact = getFactory();
InstructionList callback = new InstructionList();
if (thisVar != null) {
callback.append(InstructionConstants.ALOAD_0);
}
if (targetVar != null && targetVar != thisVar) {
callback.append(BcelRenderer.renderExpr(fact, world, targetVar));
}
callback.append(BcelRenderer.renderExprs(fact, world, argVars));
// remember to render tjps
if (thisJoinPointVar != null) {
callback.append(BcelRenderer.renderExpr(fact, world, thisJoinPointVar));
}
callback.append(Utility.createInvoke(fact, callbackMethod));
return callback;
}
/** side-effect-free */
private InstructionList makeClosureInstantiation(Member constructor, BcelVar holder) {
// LazyMethodGen constructor) {
InstructionFactory fact = getFactory();
BcelVar arrayVar = genTempVar(UnresolvedType.OBJECTARRAY);
// final Type objectArrayType = new ArrayType(Type.OBJECT, 1);
final InstructionList il = new InstructionList();
int alen = getArgCount() + (thisVar == null ? 0 : 1) + ((targetVar != null && targetVar != thisVar) ? 1 : 0)
+ (thisJoinPointVar == null ? 0 : 1);
il.append(Utility.createConstant(fact, alen));
il.append(fact.createNewArray(Type.OBJECT, (short) 1));
arrayVar.appendStore(il, fact);
int stateIndex = 0;
if (thisVar != null) {
arrayVar.appendConvertableArrayStore(il, fact, stateIndex, thisVar);
thisVar.setPositionInAroundState(stateIndex);
stateIndex++;
}
if (targetVar != null && targetVar != thisVar) {
arrayVar.appendConvertableArrayStore(il, fact, stateIndex, targetVar);
targetVar.setPositionInAroundState(stateIndex);
stateIndex++;
}
for (int i = 0, len = getArgCount(); i < len; i++) {
arrayVar.appendConvertableArrayStore(il, fact, stateIndex, argVars[i]);
argVars[i].setPositionInAroundState(stateIndex);
stateIndex++;
}
if (thisJoinPointVar != null) {
arrayVar.appendConvertableArrayStore(il, fact, stateIndex, thisJoinPointVar);
thisJoinPointVar.setPositionInAroundState(stateIndex);
stateIndex++;
}
il.append(fact.createNew(new ObjectType(constructor.getDeclaringType().getName())));
il.append(InstructionConstants.DUP);
arrayVar.appendLoad(il, fact);
il.append(Utility.createInvoke(fact, world, constructor));
if (getKind() == PreInitialization) {
il.append(InstructionConstants.DUP);
holder.appendStore(il, fact);
}
return il;
}
private IntMap makeProceedArgumentMap(BcelVar[] adviceArgs) {
// System.err.println("coming in with " + Arrays.asList(adviceArgs));
IntMap ret = new IntMap();
for (int i = 0, len = adviceArgs.length; i < len; i++) {
BcelVar v = adviceArgs[i];
if (v == null) {
continue; // XXX we don't know why this is required
}
int pos = v.getPositionInAroundState();
if (pos >= 0) { // need this test to avoid args bound via cflow
ret.put(pos, i);
}
}
// System.err.println("returning " + ret);
return ret;
}
/**
*
* @param callbackMethod the method we will call back to when our run method gets called.
* @param proceedMap A map from state position to proceed argument position. May be non covering on state position.
*/
private LazyMethodGen makeClosureClassAndReturnConstructor(String closureClassName, LazyMethodGen callbackMethod,
IntMap proceedMap) {
String superClassName = "org.aspectj.runtime.internal.AroundClosure";
Type objectArrayType = new ArrayType(Type.OBJECT, 1);
LazyClassGen closureClass = new LazyClassGen(closureClassName, superClassName, getEnclosingClass().getFileName(),
Modifier.PUBLIC, new String[] {}, getWorld());
closureClass.setMajorMinor(getEnclosingClass().getMajor(), getEnclosingClass().getMinor());
InstructionFactory fact = new InstructionFactory(closureClass.getConstantPool());
// constructor
LazyMethodGen constructor = new LazyMethodGen(Modifier.PUBLIC, Type.VOID, "", new Type[] { objectArrayType },
new String[] {}, closureClass);
InstructionList cbody = constructor.getBody();
cbody.append(InstructionFactory.createLoad(Type.OBJECT, 0));
cbody.append(InstructionFactory.createLoad(objectArrayType, 1));
cbody.append(fact
.createInvoke(superClassName, "", Type.VOID, new Type[] { objectArrayType }, Constants.INVOKESPECIAL));
cbody.append(InstructionFactory.createReturn(Type.VOID));
closureClass.addMethodGen(constructor);
// Create the 'Object run(Object[])' method
LazyMethodGen runMethod = new LazyMethodGen(Modifier.PUBLIC, Type.OBJECT, "run", new Type[] { objectArrayType },
new String[] {}, closureClass);
InstructionList mbody = runMethod.getBody();
BcelVar proceedVar = new BcelVar(UnresolvedType.OBJECTARRAY.resolve(world), 1);
// int proceedVarIndex = 1;
BcelVar stateVar = new BcelVar(UnresolvedType.OBJECTARRAY.resolve(world), runMethod.allocateLocal(1));
// int stateVarIndex = runMethod.allocateLocal(1);
mbody.append(InstructionFactory.createThis());
mbody.append(fact.createGetField(superClassName, "state", objectArrayType));
mbody.append(stateVar.createStore(fact));
// mbody.append(fact.createStore(objectArrayType, stateVarIndex));
Type[] stateTypes = callbackMethod.getArgumentTypes();
for (int i = 0, len = stateTypes.length; i < len; i++) {
ResolvedType resolvedStateType = BcelWorld.fromBcel(stateTypes[i]).resolve(world);
if (proceedMap.hasKey(i)) {
mbody.append(proceedVar.createConvertableArrayLoad(fact, proceedMap.get(i), resolvedStateType));
} else {
mbody.append(stateVar.createConvertableArrayLoad(fact, i, resolvedStateType));
}
}
mbody.append(Utility.createInvoke(fact, callbackMethod));
if (getKind() == PreInitialization) {
mbody.append(Utility.createSet(fact, AjcMemberMaker.aroundClosurePreInitializationField()));
mbody.append(InstructionConstants.ACONST_NULL);
} else {
mbody.append(Utility.createConversion(fact, callbackMethod.getReturnType(), Type.OBJECT));
}
mbody.append(InstructionFactory.createReturn(Type.OBJECT));
closureClass.addMethodGen(runMethod);
// class
getEnclosingClass().addGeneratedInner(closureClass);
return constructor;
}
// ---- extraction methods
/**
* Extract the instructions in the shadow to a new method.
*
* @param extractedMethodName name for the new method
* @param extractedMethodVisibilityModifier visibility modifiers for the new method
* @param adviceSourceLocation source location of the advice affecting the shadow
* @param beingPlacedInInterface is this new method going into an interface
*/
LazyMethodGen extractShadowInstructionsIntoNewMethod(String extractedMethodName, int extractedMethodVisibilityModifier,
ISourceLocation adviceSourceLocation, List parameterNames, boolean beingPlacedInInterface) {
// LazyMethodGen.assertGoodBody(range.getBody(), extractedMethodName);
if (!getKind().allowsExtraction()) {
throw new BCException("Attempt to extract method from a shadow kind (" + getKind()
+ ") that does not support this operation");
}
LazyMethodGen newMethod = createShadowMethodGen(extractedMethodName, extractedMethodVisibilityModifier, parameterNames, beingPlacedInInterface);
IntMap remapper = makeRemap();
range.extractInstructionsInto(newMethod, remapper, (getKind() != PreInitialization) && isFallsThrough());
if (getKind() == PreInitialization) {
addPreInitializationReturnCode(newMethod, getSuperConstructorParameterTypes());
}
getEnclosingClass().addMethodGen(newMethod, adviceSourceLocation);
return newMethod;
}
private void addPreInitializationReturnCode(LazyMethodGen extractedMethod, Type[] superConstructorTypes) {
InstructionList body = extractedMethod.getBody();
final InstructionFactory fact = getFactory();
BcelVar arrayVar = new BcelVar(world.getCoreType(UnresolvedType.OBJECTARRAY), extractedMethod.allocateLocal(1));
int len = superConstructorTypes.length;
body.append(Utility.createConstant(fact, len));
body.append(fact.createNewArray(Type.OBJECT, (short) 1));
arrayVar.appendStore(body, fact);
for (int i = len - 1; i >= 0; i++) {
// convert thing on top of stack to object
body.append(Utility.createConversion(fact, superConstructorTypes[i], Type.OBJECT));
// push object array
arrayVar.appendLoad(body, fact);
// swap
body.append(InstructionConstants.SWAP);
// do object array store.
body.append(Utility.createConstant(fact, i));
body.append(InstructionConstants.SWAP);
body.append(InstructionFactory.createArrayStore(Type.OBJECT));
}
arrayVar.appendLoad(body, fact);
body.append(InstructionConstants.ARETURN);
}
private Type[] getSuperConstructorParameterTypes() {
// assert getKind() == PreInitialization
InstructionHandle superCallHandle = getRange().getEnd().getNext();
InvokeInstruction superCallInstruction = (InvokeInstruction) superCallHandle.getInstruction();
return superCallInstruction.getArgumentTypes(getEnclosingClass().getConstantPool());
}
/**
* make a map from old frame location to new frame location. Any unkeyed frame location picks out a copied local
*/
private IntMap makeRemap() {
IntMap ret = new IntMap(5);
int reti = 0;
if (thisVar != null) {
ret.put(0, reti++); // thisVar guaranteed to be 0
}
if (targetVar != null && targetVar != thisVar) {
ret.put(targetVar.getSlot(), reti++);
}
for (int i = 0, len = argVars.length; i < len; i++) {
ret.put(argVars[i].getSlot(), reti);
reti += argVars[i].getType().getSize();
}
if (thisJoinPointVar != null) {
ret.put(thisJoinPointVar.getSlot(), reti++);
}
// we not only need to put the arguments, we also need to remap their
// aliases, which we so helpfully put into temps at the beginning of this join
// point.
if (!getKind().argsOnStack()) {
int oldi = 0;
int newi = 0;
// if we're passing in a this and we're not argsOnStack we're always
// passing in a target too
if (arg0HoldsThis()) {
ret.put(0, 0);
oldi++;
newi += 1;
}
// assert targetVar == thisVar
for (int i = 0; i < getArgCount(); i++) {
UnresolvedType type = getArgType(i);
ret.put(oldi, newi);
oldi += type.getSize();
newi += type.getSize();
}
}
// System.err.println("making remap for : " + this);
// if (targetVar != null) System.err.println("target slot : " + targetVar.getSlot());
// if (thisVar != null) System.err.println(" this slot : " + thisVar.getSlot());
// System.err.println(ret);
return ret;
}
/**
* The new method always static. It may take some extra arguments: this, target. If it's argsOnStack, then it must take both
* this/target If it's argsOnFrame, it shares this and target. ??? rewrite this to do less array munging, please
*/
private LazyMethodGen createShadowMethodGen(String newMethodName, int visibilityModifier, List parameterNames, boolean beingPlacedInInterface) {
Type[] shadowParameterTypes = BcelWorld.makeBcelTypes(getArgTypes());
int modifiers = (world.useFinal() && !beingPlacedInInterface ? Modifier.FINAL : 0) | Modifier.STATIC | visibilityModifier;
if (targetVar != null && targetVar != thisVar) {
UnresolvedType targetType = getTargetType();
targetType = ensureTargetTypeIsCorrect(targetType);
// see pr109728,pr229910 - this fixes the case when the declaring class is sometype 'X' but the (gs)etfield
// in the bytecode refers to a subtype of 'X'. This makes sure we use the type originally
// mentioned in the fieldget instruction as the method parameter and *not* the type upon which the
// field is declared because when the instructions are extracted into the new around body,
// they will still refer to the subtype.
if ((getKind() == FieldGet || getKind() == FieldSet) && getActualTargetType() != null
&& !getActualTargetType().equals(targetType.getName())) {
targetType = UnresolvedType.forName(getActualTargetType()).resolve(world);
}
ResolvedMember resolvedMember = getSignature().resolve(world);
// pr230075, pr197719
if (resolvedMember != null && Modifier.isProtected(resolvedMember.getModifiers())
&& !samePackage(resolvedMember.getDeclaringType().getPackageName(), getEnclosingType().getPackageName())
&& !resolvedMember.getName().equals("clone")) {
if (!hasThis()) { // pr197719 - static accessor has been created to handle the call
if (Modifier.isStatic(enclosingMethod.getAccessFlags()) && enclosingMethod.getName().startsWith("access$")) {
targetType = BcelWorld.fromBcel(enclosingMethod.getArgumentTypes()[0]);
}
} else {
if (!targetType.resolve(world).isAssignableFrom(getThisType().resolve(world))) {
throw new BCException("bad bytecode");
}
targetType = getThisType();
}
}
parameterNames.add("target");
// There is a 'target' and it is not the same as 'this', so add it to the parameter list
shadowParameterTypes = addTypeToFront(BcelWorld.makeBcelType(targetType), shadowParameterTypes);
}
if (thisVar != null) {
UnresolvedType thisType = getThisType();
parameterNames.add(0, "ajc$this");
shadowParameterTypes = addTypeToFront(BcelWorld.makeBcelType(thisType), shadowParameterTypes);
}
if (this.getKind() == Shadow.FieldSet || this.getKind() == Shadow.FieldGet) {
parameterNames.add(getSignature().getName());
} else {
String[] pnames = getSignature().getParameterNames(world);
if (pnames != null) {
for (int i = 0; i < pnames.length; i++) {
if (i == 0 && pnames[i].equals("this")) {
parameterNames.add("ajc$this");
} else {
parameterNames.add(pnames[i]);
}
}
}
}
// We always want to pass down thisJoinPoint in case we have already woven
// some advice in here. If we only have a single piece of around advice on a
// join point, it is unnecessary to accept (and pass) tjp.
if (thisJoinPointVar != null) {
parameterNames.add("thisJoinPoint");
shadowParameterTypes = addTypeToEnd(LazyClassGen.tjpType, shadowParameterTypes);
}
UnresolvedType returnType;
if (getKind() == PreInitialization) {
returnType = UnresolvedType.OBJECTARRAY;
} else {
if (getKind() == ConstructorCall) {
returnType = getSignature().getDeclaringType();
} else if (getKind() == FieldSet) {
returnType = UnresolvedType.VOID;
} else {
returnType = getSignature().getReturnType().resolve(world);
// returnType = getReturnType(); // for this and above lines, see pr137496
}
}
return new LazyMethodGen(modifiers, BcelWorld.makeBcelType(returnType), newMethodName, shadowParameterTypes,
NoDeclaredExceptions, getEnclosingClass());
}
private boolean samePackage(String p1, String p2) {
if (p1 == null) {
return p2 == null;
}
if (p2 == null) {
return false;
}
return p1.equals(p2);
}
private Type[] addTypeToFront(Type type, Type[] types) {
int len = types.length;
Type[] ret = new Type[len + 1];
ret[0] = type;
System.arraycopy(types, 0, ret, 1, len);
return ret;
}
private Type[] addTypeToEnd(Type type, Type[] types) {
int len = types.length;
Type[] ret = new Type[len + 1];
ret[len] = type;
System.arraycopy(types, 0, ret, 0, len);
return ret;
}
public BcelVar genTempVar(UnresolvedType utype) {
ResolvedType rtype = utype.resolve(world);
return new BcelVar(rtype, genTempVarIndex(rtype.getSize()));
}
// public static final boolean CREATE_TEMP_NAMES = true;
public BcelVar genTempVar(UnresolvedType typeX, String localName) {
BcelVar tv = genTempVar(typeX);
// if (CREATE_TEMP_NAMES) {
// for (InstructionHandle ih = range.getStart(); ih != range.getEnd(); ih = ih.getNext()) {
// if (Range.isRangeHandle(ih)) continue;
// ih.addTargeter(new LocalVariableTag(typeX, localName, tv.getSlot()));
// }
// }
return tv;
}
// eh doesn't think we need to garbage collect these (64K is a big number...)
private int genTempVarIndex(int size) {
return enclosingMethod.allocateLocal(size);
}
public InstructionFactory getFactory() {
return getEnclosingClass().getFactory();
}
@Override
public ISourceLocation getSourceLocation() {
int sourceLine = getSourceLine();
if (sourceLine == 0 || sourceLine == -1) {
// Thread.currentThread().dumpStack();
// System.err.println(this + ": " + range);
return getEnclosingClass().getType().getSourceLocation();
} else {
// For staticinitialization, if we have a nice offset, don't build a new source loc
if (getKind() == Shadow.StaticInitialization && getEnclosingClass().getType().getSourceLocation().getOffset() != 0) {
return getEnclosingClass().getType().getSourceLocation();
} else {
int offset = 0;
Kind kind = getKind();
if ((kind == MethodExecution) || (kind == ConstructorExecution) || (kind == AdviceExecution)
|| (kind == StaticInitialization) || (kind == PreInitialization) || (kind == Initialization)) {
if (getEnclosingMethod().hasDeclaredLineNumberInfo()) {
offset = getEnclosingMethod().getDeclarationOffset();
}
}
return getEnclosingClass().getType().getSourceContext().makeSourceLocation(sourceLine, offset);
}
}
}
public Shadow getEnclosingShadow() {
return enclosingShadow;
}
public LazyMethodGen getEnclosingMethod() {
return enclosingMethod;
}
public boolean isFallsThrough() {
return !terminatesWithReturn();
}
public void setActualTargetType(String className) {
this.actualInstructionTargetType = className;
}
public String getActualTargetType() {
return actualInstructionTargetType;
}
}