private void dumpStack(ThreadReference thread, boolean showPC) {
   // ### Check for these.
   // env.failure("Thread no longer exists.");
   // env.failure("Target VM must be in interrupted state.");
   // env.failure("Current thread isn't suspended.");
   // ### Should handle extremely long stack traces sensibly for user.
   List<StackFrame> stack = null;
   try {
     stack = thread.frames();
   } catch (IncompatibleThreadStateException e) {
     env.failure("Thread is not suspended.");
   }
   // ### Fix this!
   // ### Previously mishandled cases where thread was not current.
   // ### Now, prints all of the stack regardless of current frame.
   int frameIndex = 0;
   // int frameIndex = context.getCurrentFrameIndex();
   if (stack == null) {
     env.failure("Thread is not running (no stack).");
   } else {
     OutputSink out = env.getOutputSink();
     int nFrames = stack.size();
     for (int i = frameIndex; i < nFrames; i++) {
       StackFrame frame = stack.get(i);
       Location loc = frame.location();
       Method meth = loc.method();
       out.print("  [" + (i + 1) + "] ");
       out.print(meth.declaringType().name());
       out.print('.');
       out.print(meth.name());
       out.print(" (");
       if (meth.isNative()) {
         out.print("native method");
       } else if (loc.lineNumber() != -1) {
         try {
           out.print(loc.sourceName());
         } catch (AbsentInformationException e) {
           out.print("<unknown>");
         }
         out.print(':');
         out.print(loc.lineNumber());
       }
       out.print(')');
       if (showPC) {
         long pc = loc.codeIndex();
         if (pc != -1) {
           out.print(", pc = " + pc);
         }
       }
       out.println();
     }
     out.show();
   }
 }
 private void commandList(StringTokenizer t) throws NoSessionException {
   ThreadReference current = context.getCurrentThread();
   if (current == null) {
     env.error("No thread specified.");
     return;
   }
   Location loc;
   try {
     StackFrame frame = context.getCurrentFrame(current);
     if (frame == null) {
       env.failure("Thread has not yet begun execution.");
       return;
     }
     loc = frame.location();
   } catch (VMNotInterruptedException e) {
     env.failure("Target VM must be in interrupted state.");
     return;
   }
   SourceModel source = sourceManager.sourceForLocation(loc);
   if (source == null) {
     if (loc.method().isNative()) {
       env.failure("Current method is native.");
       return;
     }
     env.failure("No source available for " + Utils.locationString(loc) + ".");
     return;
   }
   ReferenceType refType = loc.declaringType();
   int lineno = loc.lineNumber();
   if (t.hasMoreTokens()) {
     String id = t.nextToken();
     // See if token is a line number.
     try {
       lineno = Integer.valueOf(id).intValue();
     } catch (NumberFormatException nfe) {
       // It isn't -- see if it's a method name.
       List<Method> meths = refType.methodsByName(id);
       if (meths == null || meths.size() == 0) {
         env.failure(
             id + " is not a valid line number or " + "method name for class " + refType.name());
         return;
       } else if (meths.size() > 1) {
         env.failure(id + " is an ambiguous method name in" + refType.name());
         return;
       }
       loc = meths.get(0).location();
       lineno = loc.lineNumber();
     }
   }
   int startLine = (lineno > 4) ? lineno - 4 : 1;
   int endLine = startLine + 9;
   String sourceLine = source.sourceLine(lineno);
   if (sourceLine == null) {
     env.failure("" + lineno + " is an invalid line number for " + refType.name());
   } else {
     OutputSink out = env.getOutputSink();
     for (int i = startLine; i <= endLine; i++) {
       sourceLine = source.sourceLine(i);
       if (sourceLine == null) {
         break;
       }
       out.print(i);
       out.print("\t");
       if (i == lineno) {
         out.print("=> ");
       } else {
         out.print("   ");
       }
       out.println(sourceLine);
     }
     out.show();
   }
 }
Beispiel #3
0
  /**
   * Move through a list of stack frames, searching for references to code found in the current
   * sketch. Return with a RunnerException that contains the location of the error, or if nothing is
   * found, just return with a RunnerException that wraps the error message itself.
   */
  protected SketchException findException(
      String message, ObjectReference or, ThreadReference thread) {
    try {
      // use to dump the stack for debugging
      //      for (StackFrame frame : thread.frames()) {
      //        System.out.println("frame: " + frame);
      //      }

      List<StackFrame> frames = thread.frames();
      for (StackFrame frame : frames) {
        try {
          Location location = frame.location();
          String filename = null;
          filename = location.sourceName();
          int lineNumber = location.lineNumber() - 1;
          SketchException rex = build.placeException(message, filename, lineNumber);
          if (rex != null) {
            return rex;
          }
        } catch (AbsentInformationException e) {
          // Any of the thread.blah() methods can throw an AbsentInformationEx
          // if that bit of data is missing. If so, just write out the error
          // message to the console.
          // e.printStackTrace();  // not useful
          exception = new SketchException(message);
          exception.hideStackTrace();
          listener.statusError(exception);
        }
      }
    } catch (IncompatibleThreadStateException e) {
      // This shouldn't happen, but if it does, print the exception in case
      // it's something that needs to be debugged separately.
      e.printStackTrace();
    }
    // before giving up, try to extract from the throwable object itself
    // since sometimes exceptions are re-thrown from a different context
    try {
      // assume object reference is Throwable, get stack trace
      Method method =
          ((ClassType) or.referenceType())
              .concreteMethodByName("getStackTrace", "()[Ljava/lang/StackTraceElement;");
      ArrayReference result =
          (ArrayReference)
              or.invokeMethod(
                  thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
      // iterate through stack frames and pull filename and line number for each
      for (Value val : result.getValues()) {
        ObjectReference ref = (ObjectReference) val;
        method =
            ((ClassType) ref.referenceType())
                .concreteMethodByName("getFileName", "()Ljava/lang/String;");
        StringReference strref =
            (StringReference)
                ref.invokeMethod(
                    thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
        String filename = strref == null ? "Unknown Source" : strref.value();
        method = ((ClassType) ref.referenceType()).concreteMethodByName("getLineNumber", "()I");
        IntegerValue intval =
            (IntegerValue)
                ref.invokeMethod(
                    thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);
        int lineNumber = intval.intValue() - 1;
        SketchException rex = build.placeException(message, filename, lineNumber);
        if (rex != null) {
          return rex;
        }
      }
      //      for (Method m : ((ClassType) or.referenceType()).allMethods()) {
      //        System.out.println(m + " | " + m.signature() + " | " + m.genericSignature());
      //      }
      // Implemented for 2.0b9, writes a stack trace when there's an internal error inside core.
      method = ((ClassType) or.referenceType()).concreteMethodByName("printStackTrace", "()V");
      //      System.err.println("got method " + method);
      or.invokeMethod(
          thread, method, new ArrayList<Value>(), ObjectReference.INVOKE_SINGLE_THREADED);

    } catch (Exception e) {
      e.printStackTrace();
    }
    // Give up, nothing found inside the pile of stack frames
    SketchException rex = new SketchException(message);
    // exception is being created /here/, so stack trace is not useful
    rex.hideStackTrace();
    return rex;
  }
Beispiel #4
0
 @Override
 public JavaLocation getLocation() {
   StackFrame stackFrame = getStackFrame();
   if (stackFrame == null) return null;
   return new JavaLocation(stackFrame.location());
 }