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import org.aspectj.lang.*;
import org.aspectj.lang.reflect.*;
import java.io.*;
/**
* Produces an XML representation of all of the join points in a program
* within the control-flow of those points matching <code>entry</code>.
*
* To use this, extend this aspect and fill in an appropriate value for
* <code>entry</code>.
*/
public abstract aspect TraceJoinPoints dominates * {
/**
* The join points which mark the entry of the traced control-flow.
* To trace all command-line programs, set this to:
* <pre>call(public static void main(String[]));</pre>
*/
protected abstract pointcut entry();
/**
* Join points which mark an exit from the control-flow. Use this
* to exclude parts of the call-graph that you're not interested in.
* The default value matches the current implementation limitation
* (in ajc-1.0) that join points within system libraries are not
* visible.
*/
protected pointcut exit(): call(* java..*.*(..));
final pointcut start(): entry() && !cflowbelow(entry());
final pointcut trace():
cflow(entry()) && !cflowbelow(exit()) && !within(TraceJoinPoints+);
before(): start() { makeLogStream(); }
before(): trace() { logEnter(thisJoinPointStaticPart); }
after(): trace() { logExit(thisJoinPointStaticPart); }
after(): start() { closeLogStream(); }
PrintStream out;
int logs = 0;
protected void makeLogStream() {
try {
out = new PrintStream(new FileOutputStream("log" + logs++ + ".xml"));
} catch (IOException ioe) {
out = System.err;
}
}
protected void closeLogStream() {
out.close();
}
int depth = 0;
boolean terminal = false;
protected void logEnter(JoinPoint.StaticPart jp) {
if (terminal) out.println(">");
indent(depth);
out.print("<" + jp.getKind());
writeSig(jp);
writePos(jp);
depth += 1;
terminal = true;
}
void writeSig(JoinPoint.StaticPart jp) {
out.print(" sig=");
out.print(quoteXml(jp.getSignature().toShortString()));
}
void writePos(JoinPoint.StaticPart jp) {
SourceLocation loc = jp.getSourceLocation();
if (loc == null) return;
out.print(" pos=");
out.print(quoteXml(loc.getFileName() +
":" + loc.getLine() +
":" + loc.getColumn()));
}
String quoteXml(String s) {
return "\"" + s.replace('<', '_').replace('>', '_') + "\"";
}
protected void logExit(JoinPoint.StaticPart jp) {
depth -= 1;
if (terminal) {
out.println("/>");
} else {
indent(depth);
out.println("</" + jp.getKind() + ">");
}
terminal = false;
}
void indent(int i) {
while (i-- > 0) out.print(" ");
}
}
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