/// <summary>
/// Close the current scope at the given offset.
/// </summary>
/// <param name="offset">The offset of where to close the scope.</param>
public void CloseScope(int offset)
{
// Make sure a scope is open
if (currentScope == null)
throw new Exception("You can not close a scope now, none are open.");
// Set the end offset for this scope and close it.
currentScope.OffsetEnd = offset;
currentScope = currentScope.ParentScope;
}
/// <summary>
/// Write out the scopes and the locals to the PDB file.
/// </summary>
/// <param name="symWriter">The symbol writer for this file.</param>
/// <param name="scope">The scope to write out.</param>
private static void WriteScopeAndLocals(QSy.SymbolWriter symWriter, Scope scope)
{
// Open the scope
symWriter.OpenScope(scope.OffsetStart);
// Add each local variable
foreach (LocalBinding lb in scope.Locals)
{
symWriter.DefineLocalVariable2(
lb.Name,
0,
#if SIMPLEWRITER
lb.Token.GetToken(),
#else
lb.Token,
#endif
1,
lb.Index,
0,
0,
lb.OffsetStart,
lb.OffsetEnd
);
}
// Add each constants
/* For now don't add constants. Doesn't work. AKB 09-01-2007
foreach (ConstantBinding cb in scope.Constants) {
symWriter.DefineConstant(
cb.Name,
cb.Value,
cb.GetSig()
);
}
*/
// Add any child scopes
foreach (Scope childScope in scope.ChildScopes)
WriteScopeAndLocals(symWriter, childScope);
// Close the scope
symWriter.CloseScope(scope.OffsetEnd);
}
/// <summary>
/// Close the current scope.
/// </summary>
public void CloseScope()
{
//Console.WriteLine("Close scope on " + currentScope._thisMeth.Name());
AddToBuffer(new CloseScope(currentScope));
currentScope = currentScope._parent;
}
/// <summary>
/// Open a new scope.
/// </summary>
/// <param name="offset">Offset as to where the scope should start.</param>
public void OpenScope(int offset)
{
// Make sure we are in a method
if (currentMethod == null)
throw new Exception("You can not open a scope before opening a method.");
// Create and add the new scope
Scope scope = new Scope();
scope.OffsetStart = offset;
scope.ParentScope = currentScope;
// Check if this is the first/root scope or a child scope.
if (currentScope == null)
{
// Check to make sure we don't try to create two root scopes.
if (currentMethod.Scope != null)
throw new Exception("Only one top-most scope is permitted.");
currentMethod.Scope = scope;
}
else
{
currentScope.ChildScopes.Add(scope);
}
// Set the current scope
currentScope = scope;
}
internal Scope(Scope parent, MethodDef thisMeth)
{
_thisMeth = thisMeth;
_parent = parent;
}
/// <summary>
/// Create a new OpenScope instruction.
/// </summary>
/// <param name="scope">The scope that is being opened.</param>
public OpenScope(Scope scope)
{
size = 0;
_scope = scope;
}
/// <summary>
/// The constructor to build a new CloseScope instruction.
/// </summary>
/// <param name="scope">The scope to close.</param>
public CloseScope(Scope scope)
{
size = 0;
_scope = scope;
}
/// <summary>
/// Open a new scope.
/// </summary>
public void OpenScope()
{
currentScope = new Scope(currentScope, thisMeth);
AddToBuffer(new OpenScope(currentScope));
//Console.WriteLine("Open scope on " + currentScope._thisMeth.Name());
}
private static Scope ReadPDBScope(PDBScope scope, MergeBuffer mergeBuffer, [CanBeNull] Scope parent, MethodDef thisMeth)
{
Contract.Requires(scope != null);
Contract.Requires(thisMeth != null);
Scope thisScope = new Scope(parent, thisMeth);
if (parent != null) mergeBuffer.Add(new OpenScope(thisScope), (uint)scope.StartOffset);
foreach (PDBVariable var in scope.Variables)
thisScope.AddLocalBinding(var.Name, var.Address);
foreach (PDBScope child in scope.Children)
ReadPDBScope(child, mergeBuffer, thisScope, thisMeth);
if (parent != null) mergeBuffer.Add(new CloseScope(thisScope), (uint)scope.EndOffset);
return thisScope;
}
