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Processing is a programming language, development environment, and online community.
This Java Mode package contains the Java mode for Processing IDE.
/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Part of the Processing project - http://processing.org
Copyright (c) 2012-15 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.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JTree; // needed for javadocs
import javax.swing.tree.DefaultMutableTreeNode;
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 classes = new HashSet<>();
/// listeners for class load events
protected List classLoadListeners = new ArrayList<>();
/// path to the src folder of the current build
protected String srcPath;
/// list of current breakpoints
protected List 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 runtimeLineChanges = new HashMap<>();
/// tab filenames which already have been tracked for runtime changes
protected Set 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 {@link ReferenceType} for a class name.
* @param name the class name
* @return the {@link ReferenceType} or null if not found
* (e.g. not yet loaded)
*/
public ReferenceType getClass(String name) {
if (name == null) {
return null;
}
if (name.equals(mainClassName)) {
return mainClass;
}
for (ReferenceType rt : classes) {
if (rt.name().equals(name)) {
return rt;
}
}
return null;
}
/**
* 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(Level.INFO, "building sketch: {0}", sketch.getName());
//LineMapping.addLineNumbers(sketch); // annotate
// mainClassName = build.build(false);
mainClassName = build.build(true);
//LineMapping.removeLineNumbers(sketch); // annotate
log(Level.INFO, "class: {0}", mainClassName);
// folder with assembled/preprocessed src
srcPath = build.getSrcFolder().getPath();
log(Level.INFO, "build src: {0}", srcPath);
// folder with compiled code (.class files)
log(Level.INFO, "build bin: {0}", build.getBinFolder().getPath());
if (mainClassName != null) {
// generate the source line mapping
//lineMap = LineMapping.generateMapping(srcPath + File.separator + mainClassName + ".java");
log(Level.INFO, "launching debuggee runtime");
runtime = new Runner(build, editor);
VirtualMachine vm = runtime.debug(null); // non-blocking
if (vm == null) {
log(Level.SEVERE, "error 37: launch failed");
}
// 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) {
log(Level.INFO, "closing runtime");
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(Level.INFO, "set breakpoint on line {0}", 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(Level.INFO, "removed breakpoint {0}", bp);
}
}
/** Remove all breakpoints. */
synchronized void clearBreakpoints() {
//TODO: handle busy-ness correctly
if (isBusy()) {
log(Level.WARNING, "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(Level.WARNING, "busy");
return;
}
Iterator 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 getBreakpoints(String tabFilename) {
List 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) {
for (Event e : es) {
log(Level.INFO, "*** VM Event: {0}", e.toString());
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 vmStartEvent() {
// break on main class load
log(Level.INFO, "requesting event on main class load: {0}", mainClassName);
ClassPrepareRequest mainClassPrepare = runtime.vm().eventRequestManager().createClassPrepareRequest();
mainClassPrepare.addClassFilter(mainClassName);
mainClassPrepare.enable();
// break on loading custom classes
for (SketchCode tab : editor.getSketch().getCode()) {
if (tab.isExtension("java")) {
log(Level.INFO, "requesting event on class load: {0}", tab.getPrettyName());
ClassPrepareRequest customClassPrepare = runtime.vm().eventRequestManager().createClassPrepareRequest();
customClassPrepare.addClassFilter(tab.getPrettyName());
customClassPrepare.enable();
}
}
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;
log(Level.INFO, "main class load: {0}", rt.name());
started = true; // now that main class is loaded, we're started
} else {
classes.add(rt); // save loaded classes
log(Level.INFO, "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 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) {
log(Level.SEVERE, null, 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) {
log(Level.SEVERE, null, 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 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) {
log(Level.SEVERE, null, ex);
} catch (AbsentInformationException ex) {
System.out.println("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(Level.WARNING, "call stack empty");
} else {
final VariableInspector vi = editor.variableInspector();
// first get data
final List stackTrace = getStackTrace(t);
final List locals = getLocals(t, 0);
final String currentLocation = currentLocation(t);
final List thisFields = getThisFields(t, 0, true);
final List 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) {
log(Level.SEVERE, null, 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) {
log(Level.SEVERE, null, 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) {
log(Level.SEVERE, null, 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 getLocals(ThreadReference t, int depth) {
//System.out.println("getting locals");
List 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) {
log(Level.SEVERE, null, ex);
} catch (AbsentInformationException ex) {
log(Level.WARNING, "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 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) {
log(Level.SEVERE, null, 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 getFields(Value value, int depth, int maxDepth,
boolean includeInherited) {
// remember: Value <- ObjectReference, ArrayReference
List 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 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 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 getArrayFields(ArrayReference array) {
List 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 getStackTrace(ThreadReference t) {
List stack = new ArrayList<>();
try {
for (StackFrame f : t.frames()) {
stack.add(new DefaultMutableTreeNode(locationToString(f.location())));
}
} catch (IncompatibleThreadStateException ex) {
log(Level.SEVERE, null, 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) {
log(Level.SEVERE, null, 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) {
log(Level.SEVERE, null, 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(Level.SEVERE, null, 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) {
log(Level.SEVERE, "invalid line number: {0}", lineNo);
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) {
log(Level.SEVERE, null, 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) {
log(Level.SEVERE, null, 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 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();
}
static private void log(Level level, String msg) {
Logger.getLogger(Debugger.class.getName()).log(level, msg);
}
static private void log(Level level, String msg, Object obj) {
Logger.getLogger(Debugger.class.getName()).log(level, msg, obj);
}
/**
* Interface for VM callbacks.
*
* @author Martin Leopold
*/
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
*/
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) {
Logger.getLogger(VMEventReader.class.getName()).log(Level.INFO, "VMEventReader quit on VM disconnect");
} catch (Exception e) {
Logger.getLogger(VMEventReader.class.getName()).log(Level.SEVERE, "VMEventReader quit", e);
}
}
}
}