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 int GetIndex(ILStream code, int offset, int length)
{
int index = code.GetOffsetIndex(offset + length);
if (index == code.Count - 1)
{
return(index);
}
index--;
return(index >= 0 ? index : code.Count - 1);
}
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());
}
