public static CorDynamicInfoHook Hook(ICorJitInfo *comp)
{
ICorDynamicInfo *dynInfo = ICorJitInfo.ICorDynamicInfo(comp);
IntPtr * vfTbl = dynInfo->vfptr;
const int SLOT_NUM = 0x27;
IntPtr * newVfTbl = (IntPtr *)Marshal.AllocHGlobal(SLOT_NUM * IntPtr.Size);
for (int i = 0; i < SLOT_NUM; i++)
{
newVfTbl[i] = vfTbl[i];
}
if (ctNum == -1)
{
for (int i = 0; i < SLOT_NUM; i++)
{
bool overrided = true;
for (byte *func = (byte *)vfTbl[i]; *func != 0xe9; func++)
{
if (IntPtr.Size == 8 ?
(*func == 0x48 && *(func + 1) == 0x81 && *(func + 2) == 0xe9) :
(*func == 0x83 && *(func + 1) == 0xe9))
{
overrided = false;
break;
}
}
if (overrided)
{
ctNum = i + 8;
break;
}
}
}
CorDynamicInfoHook ret = new CorDynamicInfoHook()
{
info = dynInfo,
comp = comp,
newVfTbl = newVfTbl,
oriVfTbl = vfTbl
};
ret.n_constructStringLiteral = new constructStringLiteral(ret.hookConstructStr);
ret.o_constructStringLiteral = Marshal.GetDelegateForFunctionPointer(vfTbl[ctNum], typeof(constructStringLiteral)) as constructStringLiteral;
newVfTbl[ctNum] = Marshal.GetFunctionPointerForDelegate(ret.n_constructStringLiteral);
dynInfo->vfptr = newVfTbl;
return(ret);
}
public static ICorStaticInfo *ICorStaticInfo(ICorDynamicInfo *ptr)
{
return((ICorStaticInfo *)((byte *)&ptr->vbptr + ptr->vbptr[hasLinkInfo ? 9 : 8]));
}
public static ICorStaticInfo *ICorStaticInfo(ICorDynamicInfo *ptr)
{
return(null);
}
