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ScriptingContext.cs
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ScriptingContext.cs
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using System;
using System.Text;
using System.IO;
using System.Reflection;
using System.Collections;
using System.Globalization;
using System.Runtime.InteropServices;
using Mono.Debugger;
using Mono.Debugger.Languages;
using Mono.GetOptions;
namespace Mono.Debugger.Frontend
{
public class ScriptingException : Exception
{
public ScriptingException (string format, params object[] args)
: base (String.Format (format, args))
{ }
}
public enum ModuleOperation
{
Ignore,
UnIgnore,
Step,
DontStep
}
public class ScriptingContext : DebuggerMarshalByRefObject
{
Thread current_thread;
Process current_process;
StackFrame current_frame;
Interpreter interpreter;
public ScriptingContext (Interpreter interpreter)
{
this.interpreter = interpreter;
}
public Interpreter Interpreter {
get { return interpreter; }
}
public bool HasTarget {
get {
return interpreter.HasTarget;
}
}
public Process CurrentProcess {
get {
if (current_process == null)
throw new TargetException (TargetError.NoTarget);
return current_process;
}
set {
current_process = value;
}
}
public Thread CurrentThread {
get {
if (current_thread == null)
throw new TargetException (TargetError.NoTarget);
return current_thread;
}
set {
current_thread = value;
if (value != null)
CurrentProcess = value.Process;
}
}
public bool HasFrame {
get { return current_frame != null; }
}
public StackFrame CurrentFrame {
get {
if (current_frame == null)
throw new TargetException (TargetError.NoTarget);
return current_frame;
}
set {
current_frame = value;
if (value != null)
CurrentThread = value.Thread;
}
}
public StackFrame GetFrame (int number)
{
Thread thread = CurrentThread;
if (!thread.IsStopped)
throw new TargetException (TargetError.NotStopped);
if (number == -1)
return thread.CurrentFrame;
Backtrace bt = thread.GetBacktrace ();
if (number >= bt.Count)
throw new ScriptingException ("No such frame: {0}", number);
return bt [number];
}
public Language CurrentLanguage {
get {
StackFrame frame = CurrentFrame;
if (frame.Language == null)
throw new ScriptingException (
"Stack frame has no source language.");
return frame.Language;
}
}
public string[] GetNamespaces (StackFrame frame)
{
Method method = frame.Method;
if ((method == null) || !method.HasLineNumbers)
return null;
return method.GetNamespaces ();
}
public string[] GetNamespaces ()
{
return GetNamespaces (CurrentFrame);
}
public SourceLocation CurrentLocation {
get {
StackFrame frame = CurrentFrame;
if (frame.SourceLocation == null)
throw new ScriptingException (
"Current location doesn't have source code");
return frame.SourceLocation;
}
}
public AddressDomain AddressDomain {
get {
return CurrentThread.AddressDomain;
}
}
public void Print (string message)
{
interpreter.Print (message);
}
public void Print (string format, params object[] args)
{
interpreter.Print (String.Format (format, args));
}
public void Print (object obj)
{
interpreter.Print (obj);
}
string MonoObjectToString (TargetStructObject obj)
{
TargetStructObject cobj = obj;
again:
TargetStructType ctype = cobj.Type;
if ((ctype.Name == "System.Object") || (ctype.Name == "System.ValueType"))
return null;
TargetClass klass = ctype.GetClass (CurrentThread);
TargetMethodInfo[] methods = klass.GetMethods (CurrentThread);
if (methods == null)
return null;
foreach (TargetMethodInfo minfo in methods) {
if (minfo.Name != "ToString")
continue;
TargetFunctionType ftype = minfo.Type;
if (ftype.ParameterTypes.Length != 0)
continue;
if (ftype.ReturnType != ftype.Language.StringType)
continue;
RuntimeInvokeResult result = CurrentThread.RuntimeInvoke (
ftype, obj, new TargetObject [0], true, false);
Interpreter.Wait (result);
if ((result.ExceptionMessage != null) || (result.ReturnObject == null))
return null;
TargetObject retval = (TargetObject) result.ReturnObject;
object value = ((TargetFundamentalObject) retval).GetObject (CurrentThread);
return String.Format ("({0}) {{ \"{1}\" }}", obj.Type.Name, value);
}
cobj = cobj.GetParentObject (CurrentThread) as TargetStructObject;
if (cobj != null)
goto again;
return null;
}
string DoFormatObject (TargetObject obj, DisplayFormat format)
{
if (format == DisplayFormat.Object) {
TargetStructObject cobj = obj as TargetStructObject;
if (cobj != null) {
string formatted = MonoObjectToString (cobj);
if (formatted != null)
return formatted;
}
}
return CurrentThread.PrintObject (interpreter.Style, obj, format);
}
public string FormatObject (object obj, DisplayFormat format)
{
string formatted;
try {
if (obj is TargetObject)
formatted = DoFormatObject ((TargetObject) obj, format);
else
formatted = interpreter.Style.FormatObject (
CurrentThread, obj, format);
} catch {
formatted = "<cannot display object>";
}
return formatted;
}
public string FormatType (TargetType type)
{
string formatted;
try {
formatted = CurrentThread.PrintType (
interpreter.Style, type);
} catch {
formatted = "<cannot display type>";
}
return (formatted);
}
public void PrintMethods (MethodSource[] methods)
{
for (int i = 0; i < methods.Length; i++) {
interpreter.Print ("{0,4} {1}", i+1, methods [i].Name);
}
}
public void PrintMethods (SourceFile source)
{
Print ("Methods from source file {0}: {1}", source.ID, source.FileName);
PrintMethods (source.Methods);
}
public void Dump (object obj)
{
if (obj == null)
Print ("null");
else if (obj is TargetObject)
Print (DumpObject ((TargetObject) obj));
else
Print ("unknown:{0}:{1}", obj.GetType (), obj);
}
public string DumpObject (TargetObject obj)
{
return String.Format ("object:{0}", DumpType (obj.Type));
}
public string DumpType (TargetType type)
{
StringBuilder sb = new StringBuilder ();
sb.Append (type.Name);
sb.Append (":");
sb.Append (type.HasFixedSize);
sb.Append (":");
sb.Append (type.Size);
sb.Append (":");
sb.Append (type.Kind);
sb.Append (" ");
switch (type.Kind) {
case TargetObjectKind.Fundamental:
sb.Append (((TargetFundamentalType) type).FundamentalKind);
break;
case TargetObjectKind.Pointer: {
TargetPointerType ptype = (TargetPointerType) type;
sb.Append (ptype.IsTypesafe);
sb.Append (":");
sb.Append (ptype.HasStaticType);
if (ptype.HasStaticType) {
sb.Append (":");
sb.Append (ptype.StaticType.Name);
}
break;
}
case TargetObjectKind.Array:
sb.Append (((TargetArrayType) type).ElementType.Name);
break;
#if FIXME
case TargetObjectKind.Alias: {
TargetTypeAlias alias = (TargetTypeAlias) type;
sb.Append (alias.TargetName);
if (alias.TargetType != null) {
sb.Append (":");
sb.Append (alias.TargetType.Name);
}
break;
}
#endif
}
return sb.ToString ();
}
public SourceLocation FindMethod (string name)
{
foreach (Module module in CurrentProcess.Modules) {
MethodSource method = module.FindMethod (name);
if (method != null)
return new SourceLocation (method);
}
return null;
}
public void ShowSources (Module module)
{
if (!module.SymbolsLoaded) {
Print ("Symbols from module {0} not loaded.", module.Name);
return;
}
Print ("Sources for module {0}:", module.Name);
foreach (SourceFile source in module.Sources) {
if (source.IsAutoGenerated &&
interpreter.DebuggerConfiguration.HideAutoGenerated)
continue;
Print ("{0,4} {1}{2}", source.ID, source.FileName,
source.IsAutoGenerated ? " (auto-generated)" : "");
if (source.CheckModified ()) {
Print (" Source file {0} is more recent than executable.",
source.FileName);
}
}
}
public void LoadLibrary (Thread thread, string filename)
{
string pathname = Path.GetFullPath (filename);
if (!File.Exists (pathname))
throw new ScriptingException (
"No such file: `{0}'", pathname);
try {
CurrentProcess.LoadLibrary (thread, pathname);
} catch (TargetException ex) {
throw new ScriptingException (
"Cannot load library `{0}': {1}",
pathname, ex.Message);
}
Print ("Loaded library {0}.", filename);
}
public void ShowDisplay (Display display)
{
if (!HasTarget) {
Print ("Display {0}: {1}", display.Index, display.Text);
return;
}
try {
string text = Interpreter.ExpressionParser.EvaluateExpression (
this, display.Text, DisplayFormat.Object);
Print ("Display {0} (\"{1}\"): {2}", display.Index, display.Text, text);
} catch (ScriptingException ex) {
Print ("Display {0} (\"{1}\"): {2}", display.Index, display.Text,
ex.Message);
} catch (Exception ex) {
Print ("Display {0} (\"{1}\"): {2}", display.Index, display.Text,
ex);
}
}
}
}