Examples with ExceptionTable org.hotswap.agent.javassist.bytecode.ExceptionTable used on opensource projects

Example 1 with ExceptionTable

use of org.hotswap.agent.javassist.bytecode.ExceptionTable in project HotswapAgent by HotswapProjects.

the class SubroutineScanner method scan.

public Subroutine[] scan(MethodInfo method) throws BadBytecode {
    CodeAttribute code = method.getCodeAttribute();
    CodeIterator iter = code.iterator();
    subroutines = new Subroutine[code.getCodeLength()];
    subTable.clear();
    done.clear();
    scan(0, iter, null);
    ExceptionTable exceptions = code.getExceptionTable();
    for (int i = 0; i < exceptions.size(); i++) {
        int handler = exceptions.handlerPc(i);
        // If an exception is thrown in subroutine, the handler
        // is part of the same subroutine.
        scan(handler, iter, subroutines[exceptions.startPc(i)]);
    }
    return subroutines;
}

Example 2 with ExceptionTable

use of org.hotswap.agent.javassist.bytecode.ExceptionTable in project HotswapAgent by HotswapProjects.

the class Analyzer method buildExceptionInfo.

private ExceptionInfo[] buildExceptionInfo(MethodInfo method) {
    ConstPool constPool = method.getConstPool();
    ClassPool classes = clazz.getClassPool();
    ExceptionTable table = method.getCodeAttribute().getExceptionTable();
    ExceptionInfo[] exceptions = new ExceptionInfo[table.size()];
    for (int i = 0; i < table.size(); i++) {
        int index = table.catchType(i);
        Type type;
        try {
            type = index == 0 ? Type.THROWABLE : Type.get(classes.get(constPool.getClassInfo(index)));
        } catch (NotFoundException e) {
            throw new IllegalStateException(e.getMessage());
        }
        exceptions[i] = new ExceptionInfo(table.startPc(i), table.endPc(i), table.handlerPc(i), type);
    }
    return exceptions;
}

Example 3 with ExceptionTable

use of org.hotswap.agent.javassist.bytecode.ExceptionTable in project HotswapAgent by HotswapProjects.

the class Expr method mayThrow.

/**
 * Returns the list of exceptions that the expression may throw. This list
 * includes both the exceptions that the try-catch statements including the
 * expression can catch and the exceptions that the throws declaration
 * allows the method to throw.
 */
public CtClass[] mayThrow() {
    ClassPool pool = thisClass.getClassPool();
    ConstPool cp = thisMethod.getConstPool();
    LinkedList list = new LinkedList();
    try {
        CodeAttribute ca = thisMethod.getCodeAttribute();
        ExceptionTable et = ca.getExceptionTable();
        int pos = currentPos;
        int n = et.size();
        for (int i = 0; i < n; ++i) if (et.startPc(i) <= pos && pos < et.endPc(i)) {
            int t = et.catchType(i);
            if (t > 0)
                try {
                    addClass(list, pool.get(cp.getClassInfo(t)));
                } catch (NotFoundException e) {
                }
        }
    } catch (NullPointerException e) {
    }
    ExceptionsAttribute ea = thisMethod.getExceptionsAttribute();
    if (ea != null) {
        String[] exceptions = ea.getExceptions();
        if (exceptions != null) {
            int n = exceptions.length;
            for (int i = 0; i < n; ++i) try {
                addClass(list, pool.get(exceptions[i]));
            } catch (NotFoundException e) {
            }
        }
    }
    return (CtClass[]) list.toArray(new CtClass[list.size()]);
}