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Diffstat (limited to 'trunk/infrastructure/rhino1_7R1/toolsrc/org/mozilla/javascript/tools/debugger/Dim.java')
| -rw-r--r-- | trunk/infrastructure/rhino1_7R1/toolsrc/org/mozilla/javascript/tools/debugger/Dim.java | 1560 |
1 files changed, 1560 insertions, 0 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/toolsrc/org/mozilla/javascript/tools/debugger/Dim.java b/trunk/infrastructure/rhino1_7R1/toolsrc/org/mozilla/javascript/tools/debugger/Dim.java new file mode 100644 index 0000000..de8fcde --- /dev/null +++ b/trunk/infrastructure/rhino1_7R1/toolsrc/org/mozilla/javascript/tools/debugger/Dim.java @@ -0,0 +1,1560 @@ +/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Rhino JavaScript Debugger code, released + * November 21, 2000. + * + * The Initial Developer of the Original Code is + * SeeBeyond Corporation. + * Portions created by the Initial Developer are Copyright (C) 2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Igor Bukanov + * Matt Gould + * Christopher Oliver + * Cameron McCormack + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License Version 2 or later (the "GPL"), in which + * case the provisions of the GPL are applicable instead of those above. If + * you wish to allow use of your version of this file only under the terms of + * the GPL and not to allow others to use your version of this file under the + * MPL, indicate your decision by deleting the provisions above and replacing + * them with the notice and other provisions required by the GPL. If you do + * not delete the provisions above, a recipient may use your version of this + * file under either the MPL or the GPL. + * + * ***** END LICENSE BLOCK ***** */ +package org.mozilla.javascript.tools.debugger; + +import org.mozilla.javascript.*; +import org.mozilla.javascript.debug.*; +import java.util.*; +import java.io.*; +import java.net.URL; + +/** + * Dim or Debugger Implementation for Rhino. + */ +public class Dim { + + // Constants for instructing the debugger what action to perform + // to end interruption. Used by 'returnValue'. + public static final int STEP_OVER = 0; + public static final int STEP_INTO = 1; + public static final int STEP_OUT = 2; + public static final int GO = 3; + public static final int BREAK = 4; + public static final int EXIT = 5; + + // Constants for the DimIProxy interface implementation class. + private static final int IPROXY_DEBUG = 0; + private static final int IPROXY_LISTEN = 1; + private static final int IPROXY_COMPILE_SCRIPT = 2; + private static final int IPROXY_EVAL_SCRIPT = 3; + private static final int IPROXY_STRING_IS_COMPILABLE = 4; + private static final int IPROXY_OBJECT_TO_STRING = 5; + private static final int IPROXY_OBJECT_PROPERTY = 6; + private static final int IPROXY_OBJECT_IDS = 7; + + /** + * Interface to the debugger GUI. + */ + private GuiCallback callback; + + /** + * Whether the debugger should break. + */ + private boolean breakFlag; + + /** + * The ScopeProvider object that provides the scope in which to + * evaluate script. + */ + private ScopeProvider scopeProvider; + + /** + * The index of the current stack frame. + */ + private int frameIndex = -1; + + /** + * Information about the current stack at the point of interruption. + */ + private volatile ContextData interruptedContextData; + + /** + * The ContextFactory to listen to for debugging information. + */ + private ContextFactory contextFactory; + + /** + * Synchronization object used to allow script evaluations to + * happen when a thread is resumed. + */ + private Object monitor = new Object(); + + /** + * Synchronization object used to wait for valid + * {@link #interruptedContextData}. + */ + private Object eventThreadMonitor = new Object(); + + /** + * The action to perform to end the interruption loop. + */ + private volatile int returnValue = -1; + + /** + * Whether the debugger is inside the interruption loop. + */ + private boolean insideInterruptLoop; + + /** + * The requested script string to be evaluated when the thread + * has been resumed. + */ + private String evalRequest; + + /** + * The stack frame in which to evaluate {@link #evalRequest}. + */ + private StackFrame evalFrame; + + /** + * The result of evaluating {@link #evalRequest}. + */ + private String evalResult; + + /** + * Whether the debugger should break when a script exception is thrown. + */ + private boolean breakOnExceptions; + + /** + * Whether the debugger should break when a script function is entered. + */ + private boolean breakOnEnter; + + /** + * Whether the debugger should break when a script function is returned + * from. + */ + private boolean breakOnReturn; + + /** + * Table mapping URLs to information about the script source. + */ + private final Hashtable urlToSourceInfo = new Hashtable(); + + /** + * Table mapping function names to information about the function. + */ + private final Hashtable functionNames = new Hashtable(); + + /** + * Table mapping functions to information about the function. + */ + private final Hashtable functionToSource = new Hashtable(); + + /** + * ContextFactory.Listener instance attached to {@link #contextFactory}. + */ + private DimIProxy listener; + + /** + * Sets the GuiCallback object to use. + */ + public void setGuiCallback(GuiCallback callback) { + this.callback = callback; + } + + /** + * Tells the debugger to break at the next opportunity. + */ + public void setBreak() { + this.breakFlag = true; + } + + /** + * Sets the ScopeProvider to be used. + */ + public void setScopeProvider(ScopeProvider scopeProvider) { + this.scopeProvider = scopeProvider; + } + + /** + * Switches context to the stack frame with the given index. + */ + public void contextSwitch(int frameIndex) { + this.frameIndex = frameIndex; + } + + /** + * Sets whether the debugger should break on exceptions. + */ + public void setBreakOnExceptions(boolean breakOnExceptions) { + this.breakOnExceptions = breakOnExceptions; + } + + /** + * Sets whether the debugger should break on function entering. + */ + public void setBreakOnEnter(boolean breakOnEnter) { + this.breakOnEnter = breakOnEnter; + } + + /** + * Sets whether the debugger should break on function return. + */ + public void setBreakOnReturn(boolean breakOnReturn) { + this.breakOnReturn = breakOnReturn; + } + + /** + * Attaches the debugger to the given ContextFactory. + */ + public void attachTo(ContextFactory factory) { + detach(); + this.contextFactory = factory; + this.listener = new DimIProxy(this, IPROXY_LISTEN); + factory.addListener(this.listener); + } + + /** + * Detaches the debugger from the current ContextFactory. + */ + public void detach() { + if (listener != null) { + contextFactory.removeListener(listener); + contextFactory = null; + listener = null; + } + } + + /** + * Releases resources associated with this debugger. + */ + public void dispose() { + detach(); + } + + /** + * Returns the FunctionSource object for the given script or function. + */ + private FunctionSource getFunctionSource(DebuggableScript fnOrScript) { + FunctionSource fsource = functionSource(fnOrScript); + if (fsource == null) { + String url = getNormalizedUrl(fnOrScript); + SourceInfo si = sourceInfo(url); + if (si == null) { + if (!fnOrScript.isGeneratedScript()) { + // Not eval or Function, try to load it from URL + String source = loadSource(url); + if (source != null) { + DebuggableScript top = fnOrScript; + for (;;) { + DebuggableScript parent = top.getParent(); + if (parent == null) { + break; + } + top = parent; + } + registerTopScript(top, source); + fsource = functionSource(fnOrScript); + } + } + } + } + return fsource; + } + + /** + * Loads the script at the given URL. + */ + private String loadSource(String sourceUrl) { + String source = null; + int hash = sourceUrl.indexOf('#'); + if (hash >= 0) { + sourceUrl = sourceUrl.substring(0, hash); + } + try { + InputStream is; + openStream: + { + if (sourceUrl.indexOf(':') < 0) { + // Can be a file name + try { + if (sourceUrl.startsWith("~/")) { + String home = SecurityUtilities.getSystemProperty("user.home"); + if (home != null) { + String pathFromHome = sourceUrl.substring(2); + File f = new File(new File(home), pathFromHome); + if (f.exists()) { + is = new FileInputStream(f); + break openStream; + } + } + } + File f = new File(sourceUrl); + if (f.exists()) { + is = new FileInputStream(f); + break openStream; + } + } catch (SecurityException ex) { } + // No existing file, assume missed http:// + if (sourceUrl.startsWith("//")) { + sourceUrl = "http:" + sourceUrl; + } else if (sourceUrl.startsWith("/")) { + sourceUrl = "http://127.0.0.1" + sourceUrl; + } else { + sourceUrl = "http://" + sourceUrl; + } + } + + is = (new URL(sourceUrl)).openStream(); + } + + try { + source = Kit.readReader(new InputStreamReader(is)); + } finally { + is.close(); + } + } catch (IOException ex) { + System.err.println + ("Failed to load source from "+sourceUrl+": "+ ex); + } + return source; + } + + /** + * Registers the given script as a top-level script in the debugger. + */ + private void registerTopScript(DebuggableScript topScript, String source) { + if (!topScript.isTopLevel()) { + throw new IllegalArgumentException(); + } + String url = getNormalizedUrl(topScript); + DebuggableScript[] functions = getAllFunctions(topScript); + final SourceInfo sourceInfo = new SourceInfo(source, functions, url); + + synchronized (urlToSourceInfo) { + SourceInfo old = (SourceInfo)urlToSourceInfo.get(url); + if (old != null) { + sourceInfo.copyBreakpointsFrom(old); + } + urlToSourceInfo.put(url, sourceInfo); + for (int i = 0; i != sourceInfo.functionSourcesTop(); ++i) { + FunctionSource fsource = sourceInfo.functionSource(i); + String name = fsource.name(); + if (name.length() != 0) { + functionNames.put(name, fsource); + } + } + } + + synchronized (functionToSource) { + for (int i = 0; i != functions.length; ++i) { + FunctionSource fsource = sourceInfo.functionSource(i); + functionToSource.put(functions[i], fsource); + } + } + + callback.updateSourceText(sourceInfo); + } + + /** + * Returns the FunctionSource object for the given function or script. + */ + private FunctionSource functionSource(DebuggableScript fnOrScript) { + return (FunctionSource)functionToSource.get(fnOrScript); + } + + /** + * Returns an array of all function names. + */ + public String[] functionNames() { + String[] a; + synchronized (urlToSourceInfo) { + Enumeration e = functionNames.keys(); + a = new String[functionNames.size()]; + int i = 0; + while (e.hasMoreElements()) { + a[i++] = (String)e.nextElement(); + } + } + return a; + } + + /** + * Returns the FunctionSource object for the function with the given name. + */ + public FunctionSource functionSourceByName(String functionName) { + return (FunctionSource)functionNames.get(functionName); + } + + /** + * Returns the SourceInfo object for the given URL. + */ + public SourceInfo sourceInfo(String url) { + return (SourceInfo)urlToSourceInfo.get(url); + } + + /** + * Returns the source URL for the given script or function. + */ + private String getNormalizedUrl(DebuggableScript fnOrScript) { + String url = fnOrScript.getSourceName(); + if (url == null) { url = "<stdin>"; } + else { + // Not to produce window for eval from different lines, + // strip line numbers, i.e. replace all #[0-9]+\(eval\) by + // (eval) + // Option: similar teatment for Function? + char evalSeparator = '#'; + StringBuffer sb = null; + int urlLength = url.length(); + int cursor = 0; + for (;;) { + int searchStart = url.indexOf(evalSeparator, cursor); + if (searchStart < 0) { + break; + } + String replace = null; + int i = searchStart + 1; + while (i != urlLength) { + int c = url.charAt(i); + if (!('0' <= c && c <= '9')) { + break; + } + ++i; + } + if (i != searchStart + 1) { + // i points after #[0-9]+ + if ("(eval)".regionMatches(0, url, i, 6)) { + cursor = i + 6; + replace = "(eval)"; + } + } + if (replace == null) { + break; + } + if (sb == null) { + sb = new StringBuffer(); + sb.append(url.substring(0, searchStart)); + } + sb.append(replace); + } + if (sb != null) { + if (cursor != urlLength) { + sb.append(url.substring(cursor)); + } + url = sb.toString(); + } + } + return url; + } + + /** + * Returns an array of all functions in the given script. + */ + private static DebuggableScript[] getAllFunctions + (DebuggableScript function) { + ObjArray functions = new ObjArray(); + collectFunctions_r(function, functions); + DebuggableScript[] result = new DebuggableScript[functions.size()]; + functions.toArray(result); + return result; + } + + /** + * Helper function for {@link #getAllFunctions(DebuggableScript)}. + */ + private static void collectFunctions_r(DebuggableScript function, + ObjArray array) { + array.add(function); + for (int i = 0; i != function.getFunctionCount(); ++i) { + collectFunctions_r(function.getFunction(i), array); + } + } + + /** + * Clears all breakpoints. + */ + public void clearAllBreakpoints() { + Enumeration e = urlToSourceInfo.elements(); + while (e.hasMoreElements()) { + SourceInfo si = (SourceInfo)e.nextElement(); + si.removeAllBreakpoints(); + } + } + + /** + * Called when a breakpoint has been hit. + */ + private void handleBreakpointHit(StackFrame frame, Context cx) { + breakFlag = false; + interrupted(cx, frame, null); + } + + /** + * Called when a script exception has been thrown. + */ + private void handleExceptionThrown(Context cx, Throwable ex, + StackFrame frame) { + if (breakOnExceptions) { + ContextData cd = frame.contextData(); + if (cd.lastProcessedException != ex) { + interrupted(cx, frame, ex); + cd.lastProcessedException = ex; + } + } + } + + /** + * Returns the current ContextData object. + */ + public ContextData currentContextData() { + return interruptedContextData; + } + + /** + * Sets the action to perform to end interruption. + */ + public void setReturnValue(int returnValue) { + synchronized (monitor) { + this.returnValue = returnValue; + monitor.notify(); + } + } + + /** + * Resumes execution of script. + */ + public void go() { + synchronized (monitor) { + this.returnValue = GO; + monitor.notifyAll(); + } + } + + /** + * Evaluates the given script. + */ + public String eval(String expr) { + String result = "undefined"; + if (expr == null) { + return result; + } + ContextData contextData = currentContextData(); + if (contextData == null || frameIndex >= contextData.frameCount()) { + return result; + } + StackFrame frame = contextData.getFrame(frameIndex); + if (contextData.eventThreadFlag) { + Context cx = Context.getCurrentContext(); + result = do_eval(cx, frame, expr); + } else { + synchronized (monitor) { + if (insideInterruptLoop) { + evalRequest = expr; + evalFrame = frame; + monitor.notify(); + do { + try { + monitor.wait(); + } catch (InterruptedException exc) { + Thread.currentThread().interrupt(); + break; + } + } while (evalRequest != null); + result = evalResult; + } + } + } + return result; + } + + /** + * Compiles the given script. + */ + public void compileScript(String url, String text) { + DimIProxy action = new DimIProxy(this, IPROXY_COMPILE_SCRIPT); + action.url = url; + action.text = text; + action.withContext(); + } + + /** + * Evaluates the given script. + */ + public void evalScript(final String url, final String text) { + DimIProxy action = new DimIProxy(this, IPROXY_EVAL_SCRIPT); + action.url = url; + action.text = text; + action.withContext(); + } + + /** + * Converts the given script object to a string. + */ + public String objectToString(Object object) { + DimIProxy action = new DimIProxy(this, IPROXY_OBJECT_TO_STRING); + action.object = object; + action.withContext(); + return action.stringResult; + } + + /** + * Returns whether the given string is syntactically valid script. + */ + public boolean stringIsCompilableUnit(String str) { + DimIProxy action = new DimIProxy(this, IPROXY_STRING_IS_COMPILABLE); + action.text = str; + action.withContext(); + return action.booleanResult; + } + + /** + * Returns the value of a property on the given script object. + */ + public Object getObjectProperty(Object object, Object id) { + DimIProxy action = new DimIProxy(this, IPROXY_OBJECT_PROPERTY); + action.object = object; + action.id = id; + action.withContext(); + return action.objectResult; + } + + /** + * Returns an array of the property names on the given script object. + */ + public Object[] getObjectIds(Object object) { + DimIProxy action = new DimIProxy(this, IPROXY_OBJECT_IDS); + action.object = object; + action.withContext(); + return action.objectArrayResult; + } + + /** + * Returns the value of a property on the given script object. + */ + private Object getObjectPropertyImpl(Context cx, Object object, + Object id) { + Scriptable scriptable = (Scriptable)object; + Object result; + if (id instanceof String) { + String name = (String)id; + if (name.equals("this")) { + result = scriptable; + } else if (name.equals("__proto__")) { + result = scriptable.getPrototype(); + } else if (name.equals("__parent__")) { + result = scriptable.getParentScope(); + } else { + result = ScriptableObject.getProperty(scriptable, name); + if (result == ScriptableObject.NOT_FOUND) { + result = Undefined.instance; + } + } + } else { + int index = ((Integer)id).intValue(); + result = ScriptableObject.getProperty(scriptable, index); + if (result == ScriptableObject.NOT_FOUND) { + result = Undefined.instance; + } + } + return result; + } + + /** + * Returns an array of the property names on the given script object. + */ + private Object[] getObjectIdsImpl(Context cx, Object object) { + if (!(object instanceof Scriptable) || object == Undefined.instance) { + return Context.emptyArgs; + } + + Object[] ids; + Scriptable scriptable = (Scriptable)object; + if (scriptable instanceof DebuggableObject) { + ids = ((DebuggableObject)scriptable).getAllIds(); + } else { + ids = scriptable.getIds(); + } + + Scriptable proto = scriptable.getPrototype(); + Scriptable parent = scriptable.getParentScope(); + int extra = 0; + if (proto != null) { + ++extra; + } + if (parent != null) { + ++extra; + } + if (extra != 0) { + Object[] tmp = new Object[extra + ids.length]; + System.arraycopy(ids, 0, tmp, extra, ids.length); + ids = tmp; + extra = 0; + if (proto != null) { + ids[extra++] = "__proto__"; + } + if (parent != null) { + ids[extra++] = "__parent__"; + } + } + + return ids; + } + + /** + * Interrupts script execution. + */ + private void interrupted(Context cx, final StackFrame frame, + Throwable scriptException) { + ContextData contextData = frame.contextData(); + boolean eventThreadFlag = callback.isGuiEventThread(); + contextData.eventThreadFlag = eventThreadFlag; + + boolean recursiveEventThreadCall = false; + +interruptedCheck: + synchronized (eventThreadMonitor) { + if (eventThreadFlag) { + if (interruptedContextData != null) { + recursiveEventThreadCall = true; + break interruptedCheck; + } + } else { + while (interruptedContextData != null) { + try { + eventThreadMonitor.wait(); + } catch (InterruptedException exc) { + return; + } + } + } + interruptedContextData = contextData; + } + + if (recursiveEventThreadCall) { + // XXX: For now the following is commented out as on Linux + // too deep recursion of dispatchNextGuiEvent causes GUI lockout. + // Note: it can make GUI unresponsive if long-running script + // will be called on GUI thread while processing another interrupt + if (false) { + // Run event dispatch until gui sets a flag to exit the initial + // call to interrupted. + while (this.returnValue == -1) { + try { + callback.dispatchNextGuiEvent(); + } catch (InterruptedException exc) { + } + } + } + return; + } + + if (interruptedContextData == null) Kit.codeBug(); + + try { + do { + int frameCount = contextData.frameCount(); + this.frameIndex = frameCount -1; + + final String threadTitle = Thread.currentThread().toString(); + final String alertMessage; + if (scriptException == null) { + alertMessage = null; + } else { + alertMessage = scriptException.toString(); + } + + int returnValue = -1; + if (!eventThreadFlag) { + synchronized (monitor) { + if (insideInterruptLoop) Kit.codeBug(); + this.insideInterruptLoop = true; + this.evalRequest = null; + this.returnValue = -1; + callback.enterInterrupt(frame, threadTitle, + alertMessage); + try { + for (;;) { + try { + monitor.wait(); + } catch (InterruptedException exc) { + Thread.currentThread().interrupt(); + break; + } + if (evalRequest != null) { + this.evalResult = null; + try { + evalResult = do_eval(cx, evalFrame, + evalRequest); + } finally { + evalRequest = null; + evalFrame = null; + monitor.notify(); + } + continue; + } + if (this.returnValue != -1) { + returnValue = this.returnValue; + break; + } + } + } finally { + insideInterruptLoop = false; + } + } + } else { + this.returnValue = -1; + callback.enterInterrupt(frame, threadTitle, alertMessage); + while (this.returnValue == -1) { + try { + callback.dispatchNextGuiEvent(); + } catch (InterruptedException exc) { + } + } + returnValue = this.returnValue; + } + switch (returnValue) { + case STEP_OVER: + contextData.breakNextLine = true; + contextData.stopAtFrameDepth = contextData.frameCount(); + break; + case STEP_INTO: + contextData.breakNextLine = true; + contextData.stopAtFrameDepth = -1; + break; + case STEP_OUT: + if (contextData.frameCount() > 1) { + contextData.breakNextLine = true; + contextData.stopAtFrameDepth + = contextData.frameCount() -1; + } + break; + } + } while (false); + } finally { + synchronized (eventThreadMonitor) { + interruptedContextData = null; + eventThreadMonitor.notifyAll(); + } + } + + } + + /** + * Evaluates script in the given stack frame. + */ + private static String do_eval(Context cx, StackFrame frame, String expr) { + String resultString; + Debugger saved_debugger = cx.getDebugger(); + Object saved_data = cx.getDebuggerContextData(); + int saved_level = cx.getOptimizationLevel(); + + cx.setDebugger(null, null); + cx.setOptimizationLevel(-1); + cx.setGeneratingDebug(false); + try { + Callable script = (Callable)cx.compileString(expr, "", 0, null); + Object result = script.call(cx, frame.scope, frame.thisObj, + ScriptRuntime.emptyArgs); + if (result == Undefined.instance) { + resultString = ""; + } else { + resultString = ScriptRuntime.toString(result); + } + } catch (Exception exc) { + resultString = exc.getMessage(); + } finally { + cx.setGeneratingDebug(true); + cx.setOptimizationLevel(saved_level); + cx.setDebugger(saved_debugger, saved_data); + } + if (resultString == null) { + resultString = "null"; + } + return resultString; + } + + /** + * Proxy class to implement debug interfaces without bloat of class + * files. + */ + private static class DimIProxy + implements ContextAction, ContextFactory.Listener, Debugger { + + /** + * The debugger. + */ + private Dim dim; + + /** + * The interface implementation type. One of the IPROXY_* constants + * defined in {@link Dim}. + */ + private int type; + + /** + * The URL origin of the script to compile or evaluate. + */ + private String url; + + /** + * The text of the script to compile, evaluate or test for compilation. + */ + private String text; + + /** + * The object to convert, get a property from or enumerate. + */ + private Object object; + + /** + * The property to look up in {@link #object}. + */ + private Object id; + + /** + * The boolean result of the action. + */ + private boolean booleanResult; + + /** + * The String result of the action. + */ + private String stringResult; + + /** + * The Object result of the action. + */ + private Object objectResult; + + /** + * The Object[] result of the action. + */ + private Object[] objectArrayResult; + + /** + * Creates a new DimIProxy. + */ + private DimIProxy(Dim dim, int type) { + this.dim = dim; + this.type = type; + } + + // ContextAction + + /** + * Performs the action given by {@link #type}. + */ + public Object run(Context cx) { + switch (type) { + case IPROXY_COMPILE_SCRIPT: + cx.compileString(text, url, 1, null); + break; + + case IPROXY_EVAL_SCRIPT: + { + Scriptable scope = null; + if (dim.scopeProvider != null) { + scope = dim.scopeProvider.getScope(); + } + if (scope == null) { + scope = new ImporterTopLevel(cx); + } + cx.evaluateString(scope, text, url, 1, null); + } + break; + + case IPROXY_STRING_IS_COMPILABLE: + booleanResult = cx.stringIsCompilableUnit(text); + break; + + case IPROXY_OBJECT_TO_STRING: + if (object == Undefined.instance) { + stringResult = "undefined"; + } else if (object == null) { + stringResult = "null"; + } else if (object instanceof NativeCall) { + stringResult = "[object Call]"; + } else { + stringResult = Context.toString(object); + } + break; + + case IPROXY_OBJECT_PROPERTY: + objectResult = dim.getObjectPropertyImpl(cx, object, id); + break; + + case IPROXY_OBJECT_IDS: + objectArrayResult = dim.getObjectIdsImpl(cx, object); + break; + + default: + throw Kit.codeBug(); + } + return null; + } + + /** + * Performs the action given by {@link #type} with the attached + * {@link ContextFactory}. + */ + private void withContext() { + dim.contextFactory.call(this); + } + + // ContextFactory.Listener + + /** + * Called when a Context is created. + */ + public void contextCreated(Context cx) { + if (type != IPROXY_LISTEN) Kit.codeBug(); + ContextData contextData = new ContextData(); + Debugger debugger = new DimIProxy(dim, IPROXY_DEBUG); + cx.setDebugger(debugger, contextData); + cx.setGeneratingDebug(true); + cx.setOptimizationLevel(-1); + } + + /** + * Called when a Context is destroyed. + */ + public void contextReleased(Context cx) { + if (type != IPROXY_LISTEN) Kit.codeBug(); + } + + // Debugger + + /** + * Returns a StackFrame for the given function or script. + */ + public DebugFrame getFrame(Context cx, DebuggableScript fnOrScript) { + if (type != IPROXY_DEBUG) Kit.codeBug(); + + FunctionSource item = dim.getFunctionSource(fnOrScript); + if (item == null) { + // Can not debug if source is not available + return null; + } + return new StackFrame(cx, dim, item); + } + + /** + * Called when compilation is finished. + */ + public void handleCompilationDone(Context cx, + DebuggableScript fnOrScript, + String source) { + if (type != IPROXY_DEBUG) Kit.codeBug(); + + if (!fnOrScript.isTopLevel()) { + return; + } + dim.registerTopScript(fnOrScript, source); + } + } + + /** + * Class to store information about a stack. + */ + public static class ContextData { + + /** + * The stack frames. + */ + private ObjArray frameStack = new ObjArray(); + + /** + * Whether the debugger should break at the next line in this context. + */ + private boolean breakNextLine; + + /** + * The frame depth the debugger should stop at. Used to implement + * "step over" and "step out". + */ + private int stopAtFrameDepth = -1; + + /** + * Whether this context is in the event thread. + */ + private boolean eventThreadFlag; + + /** + * The last exception that was processed. + */ + private Throwable lastProcessedException; + + /** + * Returns the ContextData for the given Context. + */ + public static ContextData get(Context cx) { + return (ContextData) cx.getDebuggerContextData(); + } + + /** + * Returns the number of stack frames. + */ + public int frameCount() { + return frameStack.size(); + } + + /** + * Returns the stack frame with the given index. + */ + public StackFrame getFrame(int frameNumber) { + int num = frameStack.size() - frameNumber - 1; + return (StackFrame) frameStack.get(num); + } + + /** + * Pushes a stack frame on to the stack. + */ + private void pushFrame(StackFrame frame) { + frameStack.push(frame); + } + + /** + * Pops a stack frame from the stack. + */ + private void popFrame() { + frameStack.pop(); + } + } + + /** + * Object to represent one stack frame. + */ + public static class StackFrame implements DebugFrame { + + /** + * The debugger. + */ + private Dim dim; + + /** + * The ContextData for the Context being debugged. + */ + private ContextData contextData; + + /** + * The scope. + */ + private Scriptable scope; + + /** + * The 'this' object. + */ + private Scriptable thisObj; + + /** + * Information about the function. + */ + private FunctionSource fsource; + + /** + * Array of breakpoint state for each source line. + */ + private boolean[] breakpoints; + + /** + * Current line number. + */ + private int lineNumber; + + /** + * Creates a new StackFrame. + */ + private StackFrame(Context cx, Dim dim, FunctionSource fsource) { + this.dim = dim; + this.contextData = ContextData.get(cx); + this.fsource = fsource; + this.breakpoints = fsource.sourceInfo().breakpoints; + this.lineNumber = fsource.firstLine(); + } + + /** + * Called when the stack frame is entered. + */ + public void onEnter(Context cx, Scriptable scope, + Scriptable thisObj, Object[] args) { + contextData.pushFrame(this); + this.scope = scope; + this.thisObj = thisObj; + if (dim.breakOnEnter) { + dim.handleBreakpointHit(this, cx); + } + } + + /** + * Called when the current position has changed. + */ + public void onLineChange(Context cx, int lineno) { + this.lineNumber = lineno; + + if (!breakpoints[lineno] && !dim.breakFlag) { + boolean lineBreak = contextData.breakNextLine; + if (lineBreak && contextData.stopAtFrameDepth >= 0) { + lineBreak = (contextData.frameCount() + <= contextData.stopAtFrameDepth); + } + if (!lineBreak) { + return; + } + contextData.stopAtFrameDepth = -1; + contextData.breakNextLine = false; + } + + dim.handleBreakpointHit(this, cx); + } + + /** + * Called when an exception has been thrown. + */ + public void onExceptionThrown(Context cx, Throwable exception) { + dim.handleExceptionThrown(cx, exception, this); + } + + /** + * Called when the stack frame has been left. + */ + public void onExit(Context cx, boolean byThrow, + Object resultOrException) { + if (dim.breakOnReturn && !byThrow) { + dim.handleBreakpointHit(this, cx); + } + contextData.popFrame(); + } + + /** + * Called when a 'debugger' statement is executed. + */ + public void onDebuggerStatement(Context cx) { + dim.handleBreakpointHit(this, cx); + } + + /** + * Returns the SourceInfo object for the function. + */ + public SourceInfo sourceInfo() { + return fsource.sourceInfo(); + } + + /** + * Returns the ContextData object for the Context. + */ + public ContextData contextData() { + return contextData; + } + + /** + * Returns the scope object for this frame. + */ + public Object scope() { + return scope; + } + + /** + * Returns the 'this' object for this frame. + */ + public Object thisObj() { + return thisObj; + } + + /** + * Returns the source URL. + */ + public String getUrl() { + return fsource.sourceInfo().url(); + } + + /** + * Returns the current line number. + */ + public int getLineNumber() { + return lineNumber; + } + } + + /** + * Class to store information about a function. + */ + public static class FunctionSource { + + /** + * Information about the source of the function. + */ + private SourceInfo sourceInfo; + + /** + * Line number of the first line of the function. + */ + private int firstLine; + + /** + * The function name. + */ + private String name; + + /** + * Creates a new FunctionSource. + */ + private FunctionSource(SourceInfo sourceInfo, int firstLine, + String name) { + if (name == null) throw new IllegalArgumentException(); + this.sourceInfo = sourceInfo; + this.firstLine = firstLine; + this.name = name; + } + + /** + * Returns the SourceInfo object that describes the source of the + * function. + */ + public SourceInfo sourceInfo() { + return sourceInfo; + } + + /** + * Returns the line number of the first line of the function. + */ + public int firstLine() { + return firstLine; + } + + /** + * Returns the name of the function. + */ + public String name() { + return name; + } + } + + /** + * Class to store information about a script source. + */ + public static class SourceInfo { + + /** + * An empty array of booleans. + */ + private static final boolean[] EMPTY_BOOLEAN_ARRAY = new boolean[0]; + + /** + * The script. + */ + private String source; + + /** + * The URL of the script. + */ + private String url; + + /** + * Array indicating which lines can have breakpoints set. + */ + private boolean[] breakableLines; + + /** + * Array indicating whether a breakpoint is set on the line. + */ + private boolean[] breakpoints; + + /** + * Array of FunctionSource objects for the functions in the script. + */ + private FunctionSource[] functionSources; + + /** + * Creates a new SourceInfo object. + */ + private SourceInfo(String source, DebuggableScript[] functions, + String normilizedUrl) { + this.source = source; + this.url = normilizedUrl; + + int N = functions.length; + int[][] lineArrays = new int[N][]; + for (int i = 0; i != N; ++i) { + lineArrays[i] = functions[i].getLineNumbers(); + } + + int minAll = 0, maxAll = -1; + int[] firstLines = new int[N]; + for (int i = 0; i != N; ++i) { + int[] lines = lineArrays[i]; + if (lines == null || lines.length == 0) { + firstLines[i] = -1; + } else { + int min, max; + min = max = lines[0]; + for (int j = 1; j != lines.length; ++j) { + int line = lines[j]; + if (line < min) { + min = line; + } else if (line > max) { + max = line; + } + } + firstLines[i] = min; + if (minAll > maxAll) { + minAll = min; + maxAll = max; + } else { + if (min < minAll) { + minAll = min; + } + if (max > maxAll) { + maxAll = max; + } + } + } + } + + if (minAll > maxAll) { + // No line information + this.breakableLines = EMPTY_BOOLEAN_ARRAY; + this.breakpoints = EMPTY_BOOLEAN_ARRAY; + } else { + if (minAll < 0) { + // Line numbers can not be negative + throw new IllegalStateException(String.valueOf(minAll)); + } + int linesTop = maxAll + 1; + this.breakableLines = new boolean[linesTop]; + this.breakpoints = new boolean[linesTop]; + for (int i = 0; i != N; ++i) { + int[] lines = lineArrays[i]; + if (lines != null && lines.length != 0) { + for (int j = 0; j != lines.length; ++j) { + int line = lines[j]; + this.breakableLines[line] = true; + } + } + } + } + this.functionSources = new FunctionSource[N]; + for (int i = 0; i != N; ++i) { + String name = functions[i].getFunctionName(); + if (name == null) { + name = ""; + } + this.functionSources[i] + = new FunctionSource(this, firstLines[i], name); + } + } + + /** + * Returns the source text. + */ + public String source() { + return this.source; + } + + /** + * Returns the script's origin URL. + */ + public String url() { + return this.url; + } + + /** + * Returns the number of FunctionSource objects stored in this object. + */ + public int functionSourcesTop() { + return functionSources.length; + } + + /** + * Returns the FunctionSource object with the given index. + */ + public FunctionSource functionSource(int i) { + return functionSources[i]; + } + + /** + * Copies the breakpoints from the given SourceInfo object into this + * one. + */ + private void copyBreakpointsFrom(SourceInfo old) { + int end = old.breakpoints.length; + if (end > this.breakpoints.length) { + end = this.breakpoints.length; + } + for (int line = 0; line != end; ++line) { + if (old.breakpoints[line]) { + this.breakpoints[line] = true; + } + } + } + + /** + * Returns whether the given line number can have a breakpoint set on + * it. + */ + public boolean breakableLine(int line) { + return (line < this.breakableLines.length) + && this.breakableLines[line]; + } + + /** + * Returns whether there is a breakpoint set on the given line. + */ + public boolean breakpoint(int line) { + if (!breakableLine(line)) { + throw new IllegalArgumentException(String.valueOf(line)); + } + return line < this.breakpoints.length && this.breakpoints[line]; + } + + /** + * Sets or clears the breakpoint flag for the given line. + */ + public boolean breakpoint(int line, boolean value) { + if (!breakableLine(line)) { + throw new IllegalArgumentException(String.valueOf(line)); + } + boolean changed; + synchronized (breakpoints) { + if (breakpoints[line] != value) { + breakpoints[line] = value; + changed = true; + } else { + changed = false; + } + } + return changed; + } + + /** + * Removes all breakpoints from the script. + */ + public void removeAllBreakpoints() { + synchronized (breakpoints) { + for (int line = 0; line != breakpoints.length; ++line) { + breakpoints[line] = false; + } + } + } + } +} |