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//
// System.Diagnostics.StackTrace.cs
//
// Author:
// Alexander Klyubin (klyubin@aqris.com)
// Dietmar Maurer (dietmar@ximian.com)
//
// (C) 2001
//
using System;
using System.Reflection;
using System.Threading;
using System.Runtime.CompilerServices;
using System.Collections;
namespace System.Diagnostics {
/// <summary>
/// Stack trace.
/// TODO: more information.
/// </summary>
[Serializable]
public class StackTrace {
/// <value>
/// Uses a constant to define the number of methods that are
/// to be omitted from the stack trace.
/// </value>
public const int METHODS_TO_SKIP = 0;
/// <value>
/// Frames. First frame is the last stack frame pushed.
/// </value>
private StackFrame[] frames;
/// <summary>
/// Initializes a new instance of the StackTrace class.
/// </summary>
[MonoTODO]
public StackTrace() {
init_frames (METHODS_TO_SKIP, false);
}
/// <summary>
/// Initializes a new instance of the StackTrace class.
/// </summary>
/// <param name="needFileInfo">
/// TODO:
/// </param>
public StackTrace(bool needFileInfo) {
init_frames (METHODS_TO_SKIP, needFileInfo);
}
/// <summary>
/// Initializes a new instance of the StackTrace class
/// from the current location, in a caller's frame.
/// </summary>
/// <param name="skipFrames">
/// The number of frames up the stack to start the trace
/// from.
/// </param>
public StackTrace(int skipFrames) {
init_frames (skipFrames, false);
}
/// <summary>
/// Initializes a new instance of the StackTrace class
/// from the current location, in a caller's frame.
/// </summary>
/// <param name="skipFrames">
/// The number of frames up the stack to start the trace
/// from.
/// </param>
/// <param name="needFileInfo">
/// TODO:
/// </param>
public StackTrace(int skipFrames, bool needFileInfo) {
init_frames (skipFrames, needFileInfo);
}
void init_frames (int skipFrames, bool needFileInfo)
{
StackFrame sf;
ArrayList al = new ArrayList ();
skipFrames += 2;
while ((sf = new StackFrame (skipFrames, needFileInfo)) != null &&
sf.GetMethod () != null) {
al.Add (sf);
skipFrames++;
};
frames = (StackFrame [])al.ToArray (typeof (StackFrame));
}
#if TARGET_JVM
static StackFrame [] get_trace (Exception e, int skipFrames, bool needFileInfo)
{
return null;
}
#else
[MethodImplAttribute(MethodImplOptions.InternalCall)]
extern static StackFrame [] get_trace (Exception e, int skipFrames, bool needFileInfo);
#endif
/// <summary>
/// Initializes a new instance of the StackTrace class.
/// </summary>
/// <param name="e">
/// TODO:
/// </param>
public StackTrace(Exception e)
{
frames = get_trace (e, METHODS_TO_SKIP, false);
}
/// <summary>
/// Initializes a new instance of the StackTrace class,
/// using the provided exception object. The resulting stack
/// trace describes the stack at the time of the exception.
/// </summary>
/// <param name="e">
/// TODO:
/// </param>
/// <param name="needFileInfo">
/// TODO:
/// </param>
public StackTrace(Exception e, bool needFileInfo) {
frames = get_trace (e, METHODS_TO_SKIP, needFileInfo);
}
/// <summary>
/// Initializes a new instance of the StackTrace class,
/// using the provided exception object. The resulting stack
/// trace describes the stack at the time of the exception.
/// </summary>
/// <param name="e">
/// Exception.
/// </param>
/// <param name="skipFrames">
/// The number of frames up the stack to start the trace
/// from.
/// </param>
public StackTrace(Exception e, int skipFrames) {
frames = get_trace (e, skipFrames, false);
}
/// <summary>
/// Initializes a new instance of the StackTrace class,
/// using the provided exception object. The resulting stack
/// trace describes the stack at the time of the exception.
/// </summary>
/// <param name="e">
/// Exception.
/// </param>
/// <param name="skipFrames">
/// The number of frames up the stack to start the trace
/// from.
/// </param>
/// <param name="needFileInfo">
/// TODO:
/// </param>
public StackTrace(Exception e, int skipFrames, bool needFileInfo) {
frames = get_trace (e, skipFrames, needFileInfo);
}
/// <summary>
/// Initializes a new instance of the StackTrace class
/// containing a single frame.
/// </summary>
/// <param name="frame">
/// The frame that the StackTrace object should contain.
/// </param>
public StackTrace(StackFrame frame) {
this.frames = new StackFrame[1];
this.frames[0] = frame;
}
/// <summary>
/// Initializes a new instance of the StackTrace class.
/// </summary>
/// <param name="targetThread">
/// TODO:
/// </param>
/// <param name="needFileInfo">
/// TODO:
/// </param>
[MonoTODO]
public StackTrace(Thread targetThread, bool needFileInfo) {
throw new NotImplementedException();
}
/// <summary>
/// Holds the number of frames in the stack trace.
/// </summary>
public virtual int FrameCount {
get {
return (frames == null) ? 0 : frames.Length;
}
}
/// <summary>
/// Gets the specified stack frame.
/// </summary>
/// <param name="index">
/// The index of the stack frame requested.
/// </param>
/// <returns>
/// The specified stack frame. Returns <code>null</code> if
/// frame with specified index does not exist in this stack
/// trace.
/// </returns>
/// <remarks>
/// Stack frames are numbered starting at zero, which is the
/// last stack frame pushed.
/// </remarks>
public virtual StackFrame GetFrame(int index) {
if ((index < 0) || (index >= FrameCount)) {
return null;
}
return frames[index];
}
/// <summary>
/// Builds a readable representation of the stack trace.
/// </summary>
/// <returns>
/// A readable representation of the stack trace.
/// </returns>
public override string ToString() {
string result = "";
for (int i = 0; i < FrameCount; i++) {
StackFrame frame = GetFrame(i);
result += "\n\tat " + FrameToString(frame);
}
return result;
}
public override bool Equals(Object obj) {
if ((obj == null) || (!(obj is StackTrace))) {
return false;
}
StackTrace rhs = (StackTrace) obj;
if (FrameCount != rhs.FrameCount) {
return false;
}
for (int i = 0; i < FrameCount; i++) {
if (!GetFrame(i).Equals(rhs.GetFrame(i))) {
return false;
}
}
return true;
}
public override int GetHashCode() {
return FrameCount;
}
/// <summary>
/// Converts single stack frame to string to be used in
/// ToString method.
/// </summary>
/// <param name="frame">
/// Frame to convert.
/// </param>
/// <returns>
/// A readable representation of stack frame for using
/// ToString.
/// </returns>
private static String FrameToString(StackFrame frame) {
MethodBase method = frame.GetMethod();
if (method != null) {
// Method information available
return method.DeclaringType.FullName
+ "." + method.Name + "()";
} else {
// Method information not available
return "<unknown method>";
}
}
}
}
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