/// <summary>
/// Creates a new PHP stack frame.
/// </summary>
/// <param name="context">A script context.</param>
/// <param name="frame">The respective CLR frame.</param>
/// <param name="kind">A kind of the frame.</param>
internal PhpStackFrame(ScriptContext /*!*/ context, StackFrame /*!*/ frame, FrameKinds kind)
{
Debug.Assert(context != null && frame != null && kind != FrameKinds.Invisible);
this.frame = frame;
this.kind = kind;
MethodBase method = frame.GetMethod();
if (kind == FrameKinds.ClassLibraryFunction)
{
this.name = ImplementsFunctionAttribute.Reflect(method).Name;
SetDebugInfo(frame);
}
else
{
Type type = method.DeclaringType;
int eval_id = TransientAssembly.InvalidEvalId;
if (type != null && context.ApplicationContext.IsTransientRealType(type))
{
// gets [PhpEvalId] attribute defined on the type:
object[] attrs = type.GetCustomAttributes(typeof(PhpEvalIdAttribute), false);
eval_id = ((PhpEvalIdAttribute)attrs[0]).Id;
ErrorStackInfo info = new ErrorStackInfo();
PhpStackTrace.FillEvalStackInfo(context, eval_id, ref info, false);
this.line = info.Line;
this.column = info.Column;
this.file = info.File;
this.name = info.Caller;
}
else
{
SetDebugInfo(frame);
}
// the caller has already been set by FillEvalStackInfo
// if it is not an eval main:
if (!(eval_id != TransientAssembly.InvalidEvalId && PhpScript.IsScriptType(type) && kind == FrameKinds.Main))
{
if (this.name == ScriptModule.MainHelperName)
{
this.name = "{main}";
}
else
{
int j;
PhpScript.ParseMDeclName(method.Name, out this.name, out j);
}
}
}
}
/// <summary>
/// Determines whether a specified method whose declaring type is a script type is a Main helper.
/// </summary>
/// <param name="method">The method.</param>
/// <param name="parameters">GetUserEntryPoint parameters (optimization). Can be <B>null</B> reference.</param>
/// <returns>Whether a specified method is an arg-less stub.</returns>
internal static bool IsMainHelper(MethodInfo /*!*/ method, ParameterInfo[] parameters)
{
Debug.Assert(method != null && PhpScript.IsScriptType(method.DeclaringType));
if (method.Name != ScriptModule.MainHelperName)
{
return(false);
}
if (parameters == null)
{
parameters = method.GetParameters();
}
return(parameters.Length == 5 && parameters[4].ParameterType == Emit.Types.Bool[0]);
}
/// <summary>
/// Traces the calling stack to discover current PHP class context.
/// </summary>
/// <returns><see cref="Type"/> of the PHP class that represents current class context for this thread or
/// <B>null</B> if this thread is executing in a function or startup Main context.</returns>
public static DTypeDesc GetClassContext()
{
// SILVERLIGHT: Todo Todo .. ? what to do here ?
#if !SILVERLIGHT
StackTrace stack_trace = new StackTrace(1);
int frame_count = stack_trace.FrameCount;
for (int i = 0; i < frame_count; i++)
{
StackFrame stack_frame = stack_trace.GetFrame(i);
MethodBase method = stack_frame.GetMethod();
Type type = method.DeclaringType;
if (type != null)
{
if (PhpType.IsPhpRealType(type))
{
return(DTypeDesc.Create(type));
}
MethodInfo minfo = method as MethodInfo;
if (minfo != null)
{
ParameterInfo[] parameters = minfo.GetParameters();
if (!PhpFunctionUtils.IsArglessStub(minfo, parameters) &&
PhpScript.IsScriptType(minfo.DeclaringType) && !PhpScript.IsMainHelper(minfo, parameters))
{
return(null);
}
// if the method is a helper method (Main, an arg-less overload, a constructor, etc.),
// continue with the trace
}
}
}
#endif
return(null);
}
