public static IEnumerable <TryCatchBlock> GetSelfAndDescendants(this TryCatchBlock block)
{
yield return(block);
foreach (var d in GetDescendants(block))
{
yield return(d);
}
}
public static IEnumerable <TryCatchBlock> GetDescendants(this TryCatchBlock block)
{
foreach (var kid in block.Kids.OfType <TryCatchBlock>())
{
yield return(kid);
foreach (var d in GetDescendants(kid))
{
yield return(d);
}
}
}
private static TryCatchBlock CreateTryBlock(ILStream code, int tryOffset, int tryLength)
{
int entryIndex = code.GetOffsetIndex(tryOffset);
int exitIndex = GetIndex(code, tryOffset, tryLength);
var tryBlock = new TryCatchBlock
{
EntryPoint = code[entryIndex],
ExitPoint = code[exitIndex]
};
return(tryBlock);
}
private static TryCatchBlock EnshureTryBlock(IList <SEHBlock> blocks, int i, TryCatchBlock tryBlock, ILStream code, SEHBlock block, ICollection <TryCatchBlock> list)
{
if (tryBlock == null)
{
tryBlock = CreateTryBlock(code, block.TryOffset, block.TryLength);
list.Add(tryBlock);
}
else
{
var prev = blocks[i - 1];
if (prev.TryOffset != block.TryOffset ||
prev.TryLength != block.TryLength)
{
tryBlock = CreateTryBlock(code, block.TryOffset, block.TryLength);
list.Add(tryBlock);
}
}
return(tryBlock);
}
private IReadOnlyList <TryCatchBlock> TranslateSehBlocks(IMethod method, IMethodContext context, IList <SEHBlock> blocks, ILStream code)
{
var list = new List <TryCatchBlock>();
var handlers = new BlockList();
TryCatchBlock tryBlock = null;
int n = blocks.Count;
for (int i = 0; i < n; ++i)
{
var block = blocks[i];
tryBlock = EnshureTryBlock(blocks, i, tryBlock, code, block, list);
var handler = CreateHandlerBlock(method, context, code, block);
int entryIndex = code.GetOffsetIndex(block.HandlerOffset);
int exitIndex = GetIndex(code, block.HandlerOffset, block.HandlerLength);
handler.EntryPoint = code[entryIndex];
handler.ExitPoint = code[exitIndex];
tryBlock.Handlers.Add(handler);
handlers.Add(handler);
}
//set parents
for (int i = 0; i < list.Count; ++i)
{
var block = list[i];
var parent = FindParent(list, block);
if (parent != null)
{
parent.Add(block);
list.RemoveAt(i);
--i;
}
}
foreach (var block in list)
{
SetupInstructions(code, block);
}
return(list.AsReadOnlyList());
}
