public int ReserveTableEntry(long ownerAddress, long address, bool isJump)
{
int entry = Interlocked.Increment(ref _tableEnd);
if (entry >= JumpTableSize)
{
throw new OutOfMemoryException("JIT Direct Jump Table exhausted.");
}
_jumpRegion.ExpandIfNeeded((ulong)((entry + 1) * JumpTableStride));
// Is the address we have already registered? If so, put the function address in the jump table.
// If not, it will point to the direct call stub.
long value = (long)DirectCallStubs.DirectCallStub(isJump);
if (_targets.TryGetValue((ulong)address, out TranslatedFunction func))
{
value = func.GetPointer().ToInt64();
}
// Make sure changes to the function at the target address update this jump table entry.
LinkedList <int> targetDependants = _dependants.GetOrAdd((ulong)address, (addr) => new LinkedList <int>());
lock (targetDependants)
{
targetDependants.AddLast(entry);
}
IntPtr addr = _jumpRegion.Pointer + entry * JumpTableStride;
Marshal.WriteInt64(addr, 0, address);
Marshal.WriteInt64(addr, 8, value);
return(entry);
}
public int ReserveTableEntry(long ownerAddress, long address, bool isJump)
{
int entry = Interlocked.Increment(ref _tableEnd);
ExpandIfNeededJumpTable(entry);
// Is the address we have already registered? If so, put the function address in the jump table.
// If not, it will point to the direct call stub.
long value = DirectCallStubs.DirectCallStub(isJump).ToInt64();
if (Targets.TryGetValue((ulong)address, out TranslatedFunction func))
{
value = func.FuncPtr.ToInt64();
}
// Make sure changes to the function at the target address update this jump table entry.
LinkedList <int> targetDependants = Dependants.GetOrAdd((ulong)address, (addr) => new LinkedList <int>());
lock (targetDependants)
{
targetDependants.AddLast(entry);
}
IntPtr addr = GetEntryAddressJumpTable(entry);
Marshal.WriteInt64(addr, 0, address);
Marshal.WriteInt64(addr, 8, value);
return(entry);
}
