/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */ /* Part of the Processing project - http://processing.org Copyright (c) 2012-16 The Processing Foundation This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ package processing.mode.java; import com.sun.jdi.*; import com.sun.jdi.event.*; import com.sun.jdi.request.*; import java.io.*; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.LinkedHashSet; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import javax.swing.JTree; // needed for javadocs import javax.swing.tree.DefaultMutableTreeNode; import processing.app.Messages; import processing.app.Sketch; import processing.app.SketchCode; import processing.mode.java.debug.*; import processing.mode.java.runner.Runner; public class Debugger { /// editor window, acting as main view protected JavaEditor editor; /// the runtime, contains debuggee VM protected Runner runtime; /// debuggee vm has started, VMStartEvent received, main class loaded protected boolean started = false; /// currently paused at breakpoint or step protected boolean paused = false; /// thread the last breakpoint or step occured in protected ThreadReference currentThread; /// name of the main class that's currently being debugged protected String mainClassName; /// the debuggee's main class protected ReferenceType mainClass; /// holds all loaded classes in the debuggee VM protected Set<ReferenceType> classes = new LinkedHashSet<>(); /// listeners for class load events protected List<ClassLoadListener> classLoadListeners = new ArrayList<>(); /// path to the src folder of the current build protected String srcPath; /// list of current breakpoints protected List<LineBreakpoint> breakpoints = new ArrayList<>(); /// the step request we are currently in, or null if not in a step protected StepRequest requestedStep; /// maps line number changes at runtime (orig -> changed) protected Map<LineID, LineID> runtimeLineChanges = new HashMap<>(); /// tab filenames which already have been tracked for runtime changes protected Set<String> runtimeTabsTracked = new HashSet<>(); /// VM event listener protected VMEventListener vmEventListener = this::vmEvent; public Debugger(JavaEditor editor) { this.editor = editor; } public VirtualMachine vm() { if (runtime != null) { return runtime.vm(); } return null; } public JavaEditor getEditor() { return editor; } /** * Retrieve the main class of the debuggee VM. * @return the main classes {@link ReferenceType} * or null if the debugger is not started. */ public ReferenceType getMainClass() { if (isStarted()) { return mainClass; } return null; } /** * Get the main and nested {@link ReferenceType}s for the sketch. * @return a list of main and nested {@link ReferenceType}s, * empty list if nothing found (e.g. not yet loaded) */ public Set<ReferenceType> getClasses() { return classes; } /** * Add a class load listener. Will be notified when a class is loaded in the * debuggee VM. * @param listener the {@link ClassLoadListener} */ public void addClassLoadListener(ClassLoadListener listener) { classLoadListeners.add(listener); } /** * Remove a class load listener. Cease to be notified when classes are * loaded in the debuggee VM. * @param listener {@link ClassLoadListener} */ public void removeClassLoadListener(ClassLoadListener listener) { classLoadListeners.remove(listener); } /** * Start a debugging session. Builds the sketch and launches a VM to run it. * VM starts suspended. Should produce a VMStartEvent. */ public synchronized void startDebug() { //stopDebug(); // stop any running sessions if (isStarted()) { return; // do nothing } // we are busy now editor.statusBusy(); // clear console editor.clearConsole(); // clear variable inspector (also resets expanded states) editor.variableInspector().reset(); // load edits into sketch obj, etc... editor.prepareRun(); // after prepareRun, since this removes highlights editor.activateDebug(); try { Sketch sketch = editor.getSketch(); JavaBuild build = new JavaBuild(sketch); log("building sketch: " + sketch.getName()); //LineMapping.addLineNumbers(sketch); // annotate // mainClassName = build.build(false); mainClassName = build.build(true); //LineMapping.removeLineNumbers(sketch); // annotate log("class: " + mainClassName); // folder with assembled/preprocessed src srcPath = build.getSrcFolder().getPath(); log("build src: " + srcPath); // folder with compiled code (.class files) log("build bin: " + build.getBinFolder().getPath()); if (mainClassName != null) { // generate the source line mapping //lineMap = LineMapping.generateMapping(srcPath + File.separator + mainClassName + ".java"); log("launching debuggee runtime"); runtime = new Runner(build, editor); VirtualMachine vm = runtime.debug(null); // non-blocking if (vm == null) { loge("error 37: launch failed", null); } // start receiving vm events VMEventReader eventThread = new VMEventReader(vm.eventQueue(), vmEventListener); eventThread.start(); startTrackingLineChanges(); editor.statusBusy(); } } catch (Exception e) { editor.statusError(e); } } /** * End debugging session. Stops and disconnects VM. Should produce * VMDisconnectEvent. */ public synchronized void stopDebug() { editor.variableInspector().lock(); if (runtime != null) { Messages.log("closing runtime"); for (LineBreakpoint bp : breakpoints) { bp.detach(); } runtime.close(); runtime = null; //build = null; classes.clear(); // need to clear highlight here because, VMDisconnectedEvent seems to be unreliable. TODO: likely synchronization problem editor.clearCurrentLine(); } stopTrackingLineChanges(); started = false; editor.deactivateDebug(); editor.deactivateContinue(); editor.deactivateStep(); editor.statusEmpty(); } /** Resume paused debugging session. Resumes VM. */ public synchronized void continueDebug() { editor.activateContinue(); editor.variableInspector().lock(); //editor.clearSelection(); //clearHighlight(); editor.clearCurrentLine(); if (!isStarted()) { startDebug(); } else if (isPaused()) { runtime.vm().resume(); paused = false; editor.statusBusy(); } } /** * Step through source code lines. * @param stepDepth the step depth ({@link StepRequest#STEP_OVER}, * {@link StepRequest#STEP_INTO} or {@link StepRequest#STEP_OUT}) */ protected void step(int stepDepth) { if (!isStarted()) { startDebug(); } else if (isPaused()) { editor.variableInspector().lock(); editor.activateStep(); // use global to mark that there is a step request pending requestedStep = runtime.vm().eventRequestManager().createStepRequest(currentThread, StepRequest.STEP_LINE, stepDepth); requestedStep.addCountFilter(1); // valid for one step only requestedStep.enable(); paused = false; runtime.vm().resume(); editor.statusBusy(); } } /** Step over current statement. */ public synchronized void stepOver() { step(StepRequest.STEP_OVER); } /** Step into current statement. */ public synchronized void stepInto() { step(StepRequest.STEP_INTO); } /** Step out of current statement. */ public synchronized void stepOut() { step(StepRequest.STEP_OUT); } // /** Print the current stack trace. */ // public synchronized void printStackTrace() { // if (isStarted()) { // printStackTrace(currentThread); // } // } // // // /** // * Print local variables. Outputs type, name and value of each variable. // */ // public synchronized void printLocals() { // if (isStarted()) { // printLocalVariables(currentThread); // } // } // // // /** // * Print fields of current {@code this}-object. // * Outputs type, name and value of each field. // */ // public synchronized void printThis() { // if (isStarted()) { // printThis(currentThread); // } // } // // // /** // * Print a source code snippet of the current location. // */ // public synchronized void printSource() { // if (isStarted()) { // printSourceLocation(currentThread); // } // } /** * Set a breakpoint on the current line. */ synchronized void setBreakpoint() { setBreakpoint(editor.getCurrentLineID()); } /** * Set a breakpoint on a line in the current tab. * @param lineIdx the line index (0-based) of the current tab to set the * breakpoint on */ synchronized void setBreakpoint(int lineIdx) { setBreakpoint(editor.getLineIDInCurrentTab(lineIdx)); } synchronized void setBreakpoint(LineID line) { // do nothing if we are kinda busy if (isStarted() && !isPaused()) { return; } // do nothing if there already is a breakpoint on this line if (hasBreakpoint(line)) { return; } breakpoints.add(new LineBreakpoint(line, this)); log("set breakpoint on line " + line); } /** * Remove a breakpoint from the current line (if set). */ synchronized void removeBreakpoint() { removeBreakpoint(editor.getCurrentLineID().lineIdx()); } /** * Remove a breakpoint from a line in the current tab. * * @param lineIdx the line index (0-based) in the current tab to remove the * breakpoint from */ void removeBreakpoint(int lineIdx) { // do nothing if we are kinda busy if (isBusy()) { return; } LineBreakpoint bp = breakpointOnLine(editor.getLineIDInCurrentTab(lineIdx)); if (bp != null) { bp.remove(); breakpoints.remove(bp); log("removed breakpoint " + bp); } } /** Remove all breakpoints. */ synchronized void clearBreakpoints() { // TODO: handle busy-ness correctly if (isBusy()) { log("busy"); return; } for (LineBreakpoint bp : breakpoints) { bp.remove(); } breakpoints.clear(); } /** * Clear breakpoints in a specific tab. * @param tabFilename the tab's file name */ synchronized void clearBreakpoints(String tabFilename) { // TODO: handle busy-ness correctly if (isBusy()) { log("busy"); return; } Iterator<LineBreakpoint> i = breakpoints.iterator(); while (i.hasNext()) { LineBreakpoint bp = i.next(); if (bp.lineID().fileName().equals(tabFilename)) { bp.remove(); i.remove(); } } } /** * Get the breakpoint on a certain line, if set. * @param line the line to get the breakpoint from * @return the breakpoint, or null if no breakpoint is set on the specified * line. */ LineBreakpoint breakpointOnLine(LineID line) { for (LineBreakpoint bp : breakpoints) { if (bp.isOnLine(line)) { return bp; } } return null; } /** * Toggle a breakpoint on a line in the current tab. * @param lineIdx the line index (0-based) in the current tab */ synchronized void toggleBreakpoint(int lineIdx) { LineID line = editor.getLineIDInCurrentTab(lineIdx); int index = line.lineIdx(); if (hasBreakpoint(line)) { removeBreakpoint(index); } else { // Make sure the line contains actual code before setting the break // https://github.com/processing/processing/issues/3765 if (editor.getLineText(index).trim().length() != 0) { setBreakpoint(index); } } } /** * Check if there's a breakpoint on a particular line. * @param line the line id * @return true if a breakpoint is set on the given line, otherwise false */ protected boolean hasBreakpoint(LineID line) { LineBreakpoint bp = breakpointOnLine(line); return bp != null; } // /** Print a list of currently set breakpoints. */ // public synchronized void listBreakpoints() { // if (breakpoints.isEmpty()) { // System.out.println("no breakpoints"); // } else { // System.out.println("line breakpoints:"); // for (LineBreakpoint bp : breakpoints) { // System.out.println(bp); // } // } // } /** * Retrieve a list of breakpoint in a particular tab. * @param tabFilename the tab's file name * @return the list of breakpoints in the given tab */ synchronized List<LineBreakpoint> getBreakpoints(String tabFilename) { List<LineBreakpoint> list = new ArrayList<>(); for (LineBreakpoint bp : breakpoints) { if (bp.lineID().fileName().equals(tabFilename)) { list.add(bp); } } return list; } /** * Callback for VM events. Will be called from another thread. * ({@link VMEventReader}) * @param es Incoming set of events from VM */ public synchronized void vmEvent(EventSet es) { VirtualMachine vm = vm(); if (vm != null && vm != es.virtualMachine()) { // This is no longer VM we are interested in, // we already cleaned up and run different VM now. return; } for (Event e : es) { log("*** VM Event: " + e); if (e instanceof VMStartEvent) { vmStartEvent(); } else if (e instanceof ClassPrepareEvent) { vmClassPrepareEvent((ClassPrepareEvent) e); } else if (e instanceof BreakpointEvent) { vmBreakPointEvent((BreakpointEvent) e); } else if (e instanceof StepEvent) { vmStepEvent((StepEvent) e); } else if (e instanceof VMDisconnectEvent) { stopDebug(); } else if (e instanceof VMDeathEvent) { started = false; editor.statusEmpty(); } } } private void createClassPrepareRequest(String name) { ClassPrepareRequest classPrepareRequest = runtime.vm().eventRequestManager().createClassPrepareRequest(); classPrepareRequest.addClassFilter(name); classPrepareRequest.enable(); } private void vmStartEvent() { // break on main class load log("requesting event on main class load: " + mainClassName); createClassPrepareRequest(mainClassName); createClassPrepareRequest(mainClassName + "$*"); // break on loading custom classes for (SketchCode tab : editor.getSketch().getCode()) { if (tab.isExtension("java")) { log("requesting event on class load: " + tab.getPrettyName()); String name = tab.getPrettyName(); createClassPrepareRequest(name); createClassPrepareRequest(name + "$*"); } } runtime.vm().resume(); } private void vmClassPrepareEvent(ClassPrepareEvent ce) { ReferenceType rt = ce.referenceType(); currentThread = ce.thread(); paused = true; // for now we're paused if (rt.name().equals(mainClassName)) { //printType(rt); mainClass = rt; classes.add(rt); log("main class load: " + rt.name()); started = true; // now that main class is loaded, we're started } else { classes.add(rt); // save loaded classes log("class load: {0}" + rt.name()); } // notify listeners for (ClassLoadListener listener : classLoadListeners) { if (listener != null) { listener.classLoaded(rt); } } paused = false; // resuming now runtime.vm().resume(); } private void vmBreakPointEvent(BreakpointEvent be) { currentThread = be.thread(); // save this thread updateVariableInspector(currentThread); // this is already on the EDT final LineID newCurrentLine = locationToLineID(be.location()); javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { editor.setCurrentLine(newCurrentLine); editor.deactivateStep(); editor.deactivateContinue(); } }); // hit a breakpoint during a step, need to cancel the step. if (requestedStep != null) { runtime.vm().eventRequestManager().deleteEventRequest(requestedStep); requestedStep = null; } // fix canvas update issue // TODO: is this a good solution? resumeOtherThreads(currentThread); paused = true; editor.statusHalted(); } private void vmStepEvent(StepEvent se) { currentThread = se.thread(); //printSourceLocation(currentThread); updateVariableInspector(currentThread); // this is already on the EDT final LineID newCurrentLine = locationToLineID(se.location()); javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { editor.setCurrentLine(newCurrentLine); editor.deactivateStep(); editor.deactivateContinue(); } }); // delete the steprequest that triggered this step so new ones can be placed (only one per thread) EventRequestManager mgr = runtime.vm().eventRequestManager(); mgr.deleteEventRequest(se.request()); requestedStep = null; // mark that there is no step request pending paused = true; editor.statusHalted(); // disallow stepping into invisible lines if (!locationIsVisible(se.location())) { // TODO: this leads to stepping, should it run on the EDT? javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { stepOutIntoViewOrContinue(); } }); } } /** * Check whether a location corresponds to a code line in the editor. * @param l the location * @return true if the location corresponds to a line in the editor */ protected boolean locationIsVisible(Location l) { return locationToLineID(l) != null; } /** * Step out if this results in a visible location, otherwise continue. */ protected void stepOutIntoViewOrContinue() { try { List<StackFrame> frames = currentThread.frames(); if (frames.size() > 1) { if (locationIsVisible(frames.get(1).location())) { //System.out.println("stepping out to: " + locationToString(frames.get(1).location())); stepOut(); return; } } continueDebug(); } catch (IncompatibleThreadStateException ex) { logitse(ex); } } /** * Check whether a debugging session is running. i.e. the debugger is * connected to a debuggee VM, VMStartEvent has been received and main * class is loaded. * @return true if the debugger is started. */ public synchronized boolean isStarted() { return started && runtime != null && runtime.vm() != null; } /** * Check whether the debugger is paused. i.e. it is currently suspended * at a breakpoint or step. * * @return true if the debugger is paused, false otherwise or if not started * ({@link #isStarted()}) */ public synchronized boolean isPaused() { return isStarted() && paused && currentThread != null && currentThread.isSuspended(); } /** * Check whether the debugger is currently busy. i.e. running (not * suspended). * @return true if the debugger is currently running and not suspended. */ public synchronized boolean isBusy() { return isStarted() && !isPaused(); } /** * Print call stack trace of a thread. Only works on suspended threads. * @param t suspended thread to print stack trace of */ protected void printStackTrace(ThreadReference t) { if (!t.isSuspended()) { return; } try { System.out.println("stack trace for thread " + t.name() + ":"); int i = 0; for (StackFrame f : t.frames()) { // Location l = f.location(); System.out.println(i++ + ": " + f.toString()); } } catch (IncompatibleThreadStateException ex) { logitse(ex); } } /** * Resume all other threads except the one given as parameter. Useful * e.g. to just keep the thread suspended a breakpoint occurred in. * @param t the thread not to resume */ protected void resumeOtherThreads(ThreadReference t) { if (!isStarted()) { return; } for (ThreadReference other : vm().allThreads()) { if (!other.equals(t) && other.isSuspended()) { other.resume(); } } } /** * Print info about all current threads. Includes name, status, * isSuspended, isAtBreakpoint. */ public synchronized void printThreads() { if (!isPaused()) { return; } System.out.println("threads:"); for (ThreadReference t : vm().allThreads()) { printThread(t); } } /** * Print info about a thread. Includes name, status, isSuspended, * isAtBreakpoint. * @param t the thread to print info about */ protected void printThread(ThreadReference t) { System.out.println(t.name()); System.out.println(" is suspended: " + t.isSuspended()); System.out.println(" is at breakpoint: " + t.isAtBreakpoint()); System.out.println(" status: " + threadStatusToString(t.status())); } /** * Convert a status code returned by {@link ThreadReference#status() } * to a human readable form. * @param status {@link ThreadReference#THREAD_STATUS_MONITOR}, * {@link ThreadReference#THREAD_STATUS_NOT_STARTED}, * {@link ThreadReference#THREAD_STATUS_RUNNING}, * {@link ThreadReference#THREAD_STATUS_SLEEPING}, * {@link ThreadReference#THREAD_STATUS_UNKNOWN}, * {@link ThreadReference#THREAD_STATUS_WAIT} or * {@link ThreadReference#THREAD_STATUS_ZOMBIE} * @return String containing readable status code. */ protected String threadStatusToString(int status) { switch (status) { case ThreadReference.THREAD_STATUS_MONITOR: return "THREAD_STATUS_MONITOR"; case ThreadReference.THREAD_STATUS_NOT_STARTED: return "THREAD_STATUS_NOT_STARTED"; case ThreadReference.THREAD_STATUS_RUNNING: return "THREAD_STATUS_RUNNING"; case ThreadReference.THREAD_STATUS_SLEEPING: return "THREAD_STATUS_SLEEPING"; case ThreadReference.THREAD_STATUS_UNKNOWN: return "THREAD_STATUS_UNKNOWN"; case ThreadReference.THREAD_STATUS_WAIT: return "THREAD_STATUS_WAIT"; case ThreadReference.THREAD_STATUS_ZOMBIE: return "THREAD_STATUS_ZOMBIE"; default: return ""; } } /** * Print local variables on a suspended thread. Takes the topmost stack * frame and lists all local variables and their values. * * @param t suspended thread */ protected void printLocalVariables(ThreadReference t) { if (!t.isSuspended()) { return; } try { if (t.frameCount() == 0) { System.out.println("call stack empty"); } else { StackFrame sf = t.frame(0); List<LocalVariable> locals = sf.visibleVariables(); if (locals.isEmpty()) { System.out.println("no local variables"); return; } for (LocalVariable lv : locals) { System.out.println(lv.typeName() + " " + lv.name() + " = " + sf.getValue(lv)); } } } catch (IncompatibleThreadStateException ex) { logitse(ex); } catch (AbsentInformationException ex) { log("local variable information not available"); } } /** * Update variable inspector window. Displays local variables and this * fields. * @param t suspended thread to retrieve locals and this */ protected void updateVariableInspector(ThreadReference t) { if (!t.isSuspended()) { return; } try { if (t.frameCount() == 0) { // TODO: needs to be handled in a better way: log("call stack empty"); } else { final VariableInspector vi = editor.variableInspector(); // first get data final List<DefaultMutableTreeNode> stackTrace = getStackTrace(t); final List<VariableNode> locals = getLocals(t, 0); final String currentLocation = currentLocation(t); final List<VariableNode> thisFields = getThisFields(t, 0, true); final List<VariableNode> declaredThisFields = getThisFields(t, 0, false); final String thisName = thisName(t); // now update asynchronously javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { //System.out.println("updating vi. from EDT: " + javax.swing.SwingUtilities.isEventDispatchThread()); vi.updateCallStack(stackTrace, "Call Stack"); vi.updateLocals(locals, "Locals at " + currentLocation); vi.updateThisFields(thisFields, "Class " + thisName); vi.updateDeclaredThisFields(declaredThisFields, "Class " + thisName); vi.unlock(); // need to do this before rebuilding, otherwise we get these ... dots in the labels vi.rebuild(); } }); } } catch (IncompatibleThreadStateException ex) { logitse(ex); } } /** * Get the class name of the current this object in a suspended thread. * @param t a suspended thread * @return the class name of this */ protected String thisName(ThreadReference t) { try { if (!t.isSuspended() || t.frameCount() == 0) { return ""; } ObjectReference ref = t.frame(0).thisObject(); return ref == null ? "" : ref.referenceType().name(); } catch (IncompatibleThreadStateException ex) { logitse(ex); return ""; } } /** * Get a description of the current location in a suspended thread. * Format: class.method:translated_line_number * @param t a suspended thread * @return descriptive string for the given location */ protected String currentLocation(ThreadReference t) { try { if (!t.isSuspended() || t.frameCount() == 0) { return ""; } return locationToString(t.frame(0).location()); } catch (IncompatibleThreadStateException ex) { logitse(ex); return ""; } } /** * Get a string describing a location. * Format: class.method:translated_line_number * @param loc a location * @return descriptive string for the given location */ protected String locationToString(Location loc) { LineID line = locationToLineID(loc); int lineNumber = (line != null) ? (line.lineIdx() + 1) : loc.lineNumber(); return loc.declaringType().name() + "." + loc.method().name() + ":" + lineNumber; } /** * Compile a list of current locals usable for insertion into a * {@link JTree}. Recursively resolves object references. * @param t the suspended thread to get locals for * @param depth how deep to resolve nested object references. 0 will not * resolve nested objects. * @return the list of current locals */ protected List<VariableNode> getLocals(ThreadReference t, int depth) { //System.out.println("getting locals"); List<VariableNode> vars = new ArrayList<>(); try { if (t.frameCount() > 0) { StackFrame sf = t.frame(0); for (LocalVariable lv : sf.visibleVariables()) { //System.out.println("local var: " + lv.name()); Value val = sf.getValue(lv); VariableNode var = new LocalVariableNode(lv.name(), lv.typeName(), val, lv, sf); if (depth > 0) { var.addChildren(getFields(val, depth - 1, true)); } vars.add(var); } } } catch (IncompatibleThreadStateException ex) { logitse(ex); } catch (AbsentInformationException ex) { loge("local variable information not available", ex); } return vars; } /** * Compile a list of fields in the current this object usable for insertion * into a {@link JTree}. Recursively resolves object references. * @param t the suspended thread to get locals for * @param depth how deep to resolve nested object references. 0 will not * resolve nested objects. * @return the list of fields in the current this object */ protected List<VariableNode> getThisFields(ThreadReference t, int depth, boolean includeInherited) { try { if (t.frameCount() > 0) { StackFrame sf = t.frame(0); ObjectReference thisObj = sf.thisObject(); return getFields(thisObj, depth, includeInherited); } } catch (IncompatibleThreadStateException ex) { logitse(ex); } return new ArrayList<>(); } /** * Recursively get the fields of a {@link Value} for insertion into a * {@link JTree}. * @param value must be an instance of {@link ObjectReference} * @param depth the current depth * @param maxDepth the depth to stop at (inclusive) * @return list of child fields of the given value */ protected List<VariableNode> getFields(Value value, int depth, int maxDepth, boolean includeInherited) { // remember: Value <- ObjectReference, ArrayReference List<VariableNode> vars = new ArrayList<>(); if (depth <= maxDepth) { if (value instanceof ArrayReference) { return getArrayFields((ArrayReference) value); } else if (value instanceof ObjectReference) { ObjectReference obj = (ObjectReference) value; // get the fields of this object List<Field> fields = includeInherited ? obj.referenceType().visibleFields() : obj.referenceType().fields(); for (Field field : fields) { Value val = obj.getValue(field); // get the value, may be null VariableNode var = new FieldNode(field.name(), field.typeName(), val, field, obj); // recursively add children if (val != null) { var.addChildren(getFields(val, depth + 1, maxDepth, includeInherited)); } vars.add(var); } } } return vars; } /** * Recursively get the fields of a {@link Value} for insertion into a * {@link JTree}. * * @param value must be an instance of {@link ObjectReference} * @param maxDepth max recursion depth. 0 will give only direct children * @return list of child fields of the given value */ public List<VariableNode> getFields(Value value, int maxDepth, boolean includeInherited) { return getFields(value, 0, maxDepth, includeInherited); } /** * Get the fields of an array for insertion into a {@link JTree}. * @param array the array reference * @return list of array fields */ protected List<VariableNode> getArrayFields(ArrayReference array) { List<VariableNode> fields = new ArrayList<>(); if (array != null) { String arrayType = array.type().name(); if (arrayType.endsWith("[]")) { arrayType = arrayType.substring(0, arrayType.length() - 2); } int i = 0; for (Value val : array.getValues()) { VariableNode var = new ArrayFieldNode("[" + i + "]", arrayType, val, array, i); fields.add(var); i++; } } return fields; } /** * Get the current call stack trace usable for insertion into a * {@link JTree}. * @param t the suspended thread to retrieve the call stack from * @return call stack as list of {@link DefaultMutableTreeNode}s */ protected List<DefaultMutableTreeNode> getStackTrace(ThreadReference t) { List<DefaultMutableTreeNode> stack = new ArrayList<>(); try { for (StackFrame f : t.frames()) { stack.add(new DefaultMutableTreeNode(locationToString(f.location()))); } } catch (IncompatibleThreadStateException ex) { logitse(ex); } return stack; } /** * Print visible fields of current "this" object on a suspended thread. * Prints type, name and value. * @param t suspended thread */ protected void printThis(ThreadReference t) { if (!t.isSuspended()) { return; } try { if (t.frameCount() == 0) { // TODO: needs to be handled in a better way System.out.println("call stack empty"); } else { StackFrame sf = t.frame(0); ObjectReference thisObject = sf.thisObject(); if (thisObject != null) { ReferenceType type = thisObject.referenceType(); System.out.println("fields in this (" + type.name() + "):"); for (Field f : type.visibleFields()) { System.out.println(f.typeName() + " " + f.name() + " = " + thisObject.getValue(f)); } } else { System.out.println("can't get this (in native or static method)"); } } } catch (IncompatibleThreadStateException ex) { logitse(ex); } } /** * Print source code snippet of current location in a suspended thread. * @param t suspended thread */ protected void printSourceLocation(ThreadReference t) { try { if (t.frameCount() == 0) { // TODO: needs to be handled in a better way System.out.println("call stack empty"); } else { Location l = t.frame(0).location(); // current stack frame location printSourceLocation(l); } } catch (IncompatibleThreadStateException ex) { logitse(ex); } } /** * Print source code snippet. * @param l {@link Location} object to print source code for */ protected void printSourceLocation(Location l) { try { //System.out.println(l.sourceName() + ":" + l.lineNumber()); System.out.println("in method " + l.method() + ":"); System.out.println(getSourceLine(l.sourcePath(), l.lineNumber(), 2)); } catch (AbsentInformationException ex) { log("absent information", ex); } } /** * Read a line from the given file in the builds src folder. * 1-based i.e. first line has line no. 1 * @param filePath * @param lineNo * @return the requested source line */ protected String getSourceLine(String filePath, int lineNo, int radius) { if (lineNo == -1) { loge("invalid line number: " + lineNo, null); return ""; } //System.out.println("getting line: " + lineNo); File f = new File(srcPath + File.separator + filePath); String output = ""; try { BufferedReader r = new BufferedReader(new FileReader(f)); int i = 1; //String line = ""; while (i <= lineNo + radius) { String line = r.readLine(); // line no. i if (line == null) { break; // end of file } if (i >= lineNo - radius) { if (i > lineNo - radius) { output += "\n"; // add newlines before all lines but the first } output += f.getName() + ":" + i + (i == lineNo ? " => " : " ") + line; } i++; } r.close(); return output; } catch (FileNotFoundException ex) { //System.err.println(ex); return f.getName() + ":" + lineNo; } catch (IOException ex) { loge("other io exception", ex); return ""; } } /** * Print info about a ReferenceType. Prints class name, source file name, * lists methods. * @param rt the reference type to print out */ protected void printType(ReferenceType rt) { System.out.println("ref.type: " + rt); System.out.println("name: " + rt.name()); try { System.out.println("sourceName: " + rt.sourceName()); } catch (AbsentInformationException ex) { System.out.println("sourceName: unknown"); } System.out.println("methods:"); for (Method m : rt.methods()) { System.out.println(m.toString()); } } /** * Translate a java source location to a sketch line id. * @param l the location to translate * @return the corresponding line id, or null if not found */ protected LineID locationToLineID(Location l) { try { //return lineMap.get(LineID.create(l.sourceName(), l.lineNumber() - 1)); return javaToSketchLine(new LineID(l.sourceName(), l.lineNumber() - 1)); } catch (AbsentInformationException ex) { loge("absent information", ex); return null; } } /** * Translate a line (index) from java space to sketch space. * @param javaLine the java line id * @return the corresponding sketch line id or null if failed to translate */ public LineID javaToSketchLine(LineID javaLine) { Sketch sketch = editor.getSketch(); // it may belong to a pure java file created in the sketch // try to find an exact filename match and check the extension SketchCode tab = editor.getTab(javaLine.fileName()); if (tab != null && tab.isExtension("java")) { // can translate 1:1 return originalToRuntimeLine(javaLine); } // check if it is the preprocessed/assembled file for this sketch // java file name needs to match the sketches filename if (!javaLine.fileName().equals(sketch.getName() + ".java")) { return null; } // find the tab (.pde file) this line belongs to // get the last tab that has an offset not greater than the java line number for (int i = sketch.getCodeCount() - 1; i >= 0; i--) { tab = sketch.getCode(i); // ignore .java files // the tab's offset must not be greater than the java line number if (tab.isExtension("pde") && tab.getPreprocOffset() <= javaLine.lineIdx()) { final int index = javaLine.lineIdx() - tab.getPreprocOffset(); return originalToRuntimeLine(new LineID(tab.getFileName(), index)); } } return null; } /** * Get the runtime-changed line id for an original sketch line. Used to * translate line numbers from the VM (which runs on the original line * numbers) to their current (possibly changed) counterparts. * @param line the original line id (at compile time) * @return the changed version or the line given as parameter if not found */ protected LineID originalToRuntimeLine(LineID line) { LineID transformed = runtimeLineChanges.get(line); if (transformed == null) { return line; } return transformed; } /** * Get the original line id for a sketch line that was changed at runtime. * Used to translate line numbers from the UI at runtime (which can differ * from the ones the VM runs on) to their original counterparts. * @param line the (possibly) changed runtime line * @return the original line or the line given as parameter if not found */ protected LineID runtimeToOriginalLine(LineID line) { for (Entry<LineID, LineID> entry : runtimeLineChanges.entrySet()) { if (entry.getValue().equals(line)) { return entry.getKey(); } } return line; } /** * Translate a line (index) from sketch space to java space. * @param sketchLine the sketch line id * @return the corresponding java line id or null if failed to translate */ public LineID sketchToJavaLine(LineID sketchLine) { // transform back to orig (before changes at runtime) sketchLine = runtimeToOriginalLine(sketchLine); // check if there is a tab for this line SketchCode tab = editor.getTab(sketchLine.fileName()); if (tab == null) { return null; } // check if the tab is a pure java file anyway if (tab.isExtension("java")) { // 1:1 translation return sketchLine; } // the java file has a name sketchname.java // just add the tab's offset to get the java name LineID javaLine = new LineID(editor.getSketch().getName() + ".java", sketchLine.lineIdx() + tab.getPreprocOffset()); return javaLine; } /** Start tracking all line changes (due to edits) in the current tab. */ protected void startTrackingLineChanges() { // TODO: maybe move this to the editor? SketchCode tab = editor.getSketch().getCurrentCode(); if (runtimeTabsTracked.contains(tab.getFileName())) { return; } for (int i = 0; i < tab.getLineCount(); i++) { LineID old = new LineID(tab.getFileName(), i); LineID tracked = new LineID(tab.getFileName(), i); tracked.startTracking(editor.currentDocument()); runtimeLineChanges.put(old, tracked); } runtimeTabsTracked.add(tab.getFileName()); //System.out.println("tracking tab: " + tab.getFileName()); } /** Stop tracking line changes in all tabs. */ protected void stopTrackingLineChanges() { //System.out.println("stop tracking line changes"); for (LineID tracked : runtimeLineChanges.values()) { tracked.stopTracking(); } runtimeLineChanges.clear(); runtimeTabsTracked.clear(); } private void log(String msg, Object... args) { if (args != null && args.length != 0) { Messages.logf(getClass().getName() + " " + msg, args); } else { Messages.log(getClass().getName() + " " + msg); } } private void loge(String msg, Throwable t) { if (t != null) { Messages.loge(getClass().getName() + " " + msg, t); } else { Messages.loge(getClass().getName() + " " + msg); } } static private void logitse(Throwable t) { Messages.loge("incompatible thread state?", t); } /** * Interface for VM callbacks. */ protected interface VMEventListener { /** * Receive an event from the VM. Events are sent in batches. See * documentation of EventSet for more information. * @param es Set of events */ void vmEvent(EventSet es); } /** * Reader Thread for VM Events. Constantly monitors a VMs EventQueue for new * events and forwards them to an VMEventListener. * * @author Martin Leopold <m@martinleopold.com> */ protected static class VMEventReader extends Thread { EventQueue eventQueue; VMEventListener listener; /** * Construct a VMEventReader. Needs to be kicked off with start() once * constructed. * * @param eventQueue The queue to read events from. Can be obtained from a * VirtualMachine via eventQueue(). * @param listener the listener to forward events to. */ public VMEventReader(EventQueue eventQueue, VMEventListener listener) { super("VM Event Thread"); this.eventQueue = eventQueue; this.listener = listener; } @Override public void run() { try { while (true) { EventSet eventSet = eventQueue.remove(); listener.vmEvent(eventSet); // for (Event e : eventSet) { System.out.println("VM Event: " + e.toString()); } } } catch (VMDisconnectedException e) { Messages.log("VMEventReader quit on VM disconnect"); } catch (Exception e) { Messages.loge("VMEventReader quit", e); } } } }