mirror of
https://github.com/alliedmodders/metamod-source.git
synced 2024-12-01 13:24:25 +01:00
872 lines
22 KiB
C++
872 lines
22 KiB
C++
/* ======== SourceHook ========
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* vim: set ts=4 sw=4 tw=99 noet:
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* Copyright (C) 2004-2010 Metamod:Source Development Team
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* No warranties of any kind
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*
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* License: zlib/libpng
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*
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* Author(s): Pavol "PM OnoTo" Marko
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* Contributors: Scott "Damaged Soul" Ehlert
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* ============================
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*/
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/**
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* @file sourcehook.cpp
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* @brief Contains the implementation of the SourceHook API
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*/
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#if defined __GNUC__
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#include <stdint.h>
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#endif
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#include "sourcehook_impl.h"
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namespace SourceHook
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{
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template<>
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int HashFunction<int>(const int & k)
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{
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return k;
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}
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template<>
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int Compare<int>(const int & k1, const int & k2)
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{
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if (k1 == k2)
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return 0;
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if (k1 > k2)
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return 1;
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if (k1 < k2)
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return -1;
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return 0;
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}
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namespace Impl
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{
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//////////////////////////////////////////////////////////////////////////
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// CVfnPtrList
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//////////////////////////////////////////////////////////////////////////
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CVfnPtr *CVfnPtrList::GetVfnPtr(void *vfnptr)
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{
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iterator iter = find(vfnptr);
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if (iter == end())
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{
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// No vfnptr info object found
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// --> create a new one
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CVfnPtr newVfnPtr(vfnptr);
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if (newVfnPtr.Init())
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{
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push_back(newVfnPtr);
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return &(back());
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}
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else
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{
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// Initialization failed.
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return NULL;
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}
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}
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else
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{
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return &(*iter);
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}
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}
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//////////////////////////////////////////////////////////////////////////
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// CSourceHookImpl
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//////////////////////////////////////////////////////////////////////////
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CSourceHookImpl::CSourceHookImpl()
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{
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}
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CSourceHookImpl::~CSourceHookImpl()
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{
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CompleteShutdown();
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}
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int CSourceHookImpl::GetIfaceVersion()
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{
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return SH_IFACE_VERSION;
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}
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int CSourceHookImpl::GetImplVersion()
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{
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return SH_IMPL_VERSION;
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}
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int CSourceHookImpl::AddHook(Plugin plug, AddHookMode mode, void *iface, int thisptr_offs, HookManagerPubFunc myHookMan,
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ISHDelegate *handler, bool post)
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{
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if (mode != Hook_Normal && mode != Hook_VP && mode != Hook_DVP)
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return 0;
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// Get info about hook manager
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CHookManager hookManager(plug, myHookMan);
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if (!hookManager)
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return 0;
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void *adjustediface = NULL;
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void **cur_vtptr = NULL;
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void *cur_vfnptr = NULL;
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// find vfnptr
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switch (mode)
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{
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case Hook_Normal:
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adjustediface = reinterpret_cast<void*>(reinterpret_cast<char*>(iface) + thisptr_offs);
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cur_vtptr = *reinterpret_cast<void***>(
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reinterpret_cast<char*>(adjustediface) + hookManager.GetVtblOffs());
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cur_vfnptr = reinterpret_cast<void*>(cur_vtptr + hookManager.GetVtblIdx());
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break;
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case Hook_VP:
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adjustediface = reinterpret_cast<void*>(reinterpret_cast<char*>(iface) + thisptr_offs);
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cur_vtptr = *reinterpret_cast<void***>(
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reinterpret_cast<char*>(adjustediface) + hookManager.GetVtblOffs());
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cur_vfnptr = reinterpret_cast<void*>(cur_vtptr + hookManager.GetVtblIdx());
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adjustediface = NULL;
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break;
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case Hook_DVP:
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adjustediface = NULL;
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cur_vtptr = reinterpret_cast<void**>(iface);
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cur_vfnptr = cur_vtptr + hookManager.GetVtblIdx();
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break;
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}
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CVfnPtr *vfnPtr = m_VfnPtrs.GetVfnPtr(cur_vfnptr);
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if (!vfnPtr)
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{
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// Could not create the vfnptr info object.
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// This could be because a thunk generation on GCC
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// has failed. See sourcehook_impl_cvfnptr.cpp
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// for details.
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return false;
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}
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vfnPtr->AddHookMan(m_HookManList.GetHookMan(hookManager));
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CIface &ifaceinst = vfnPtr->GetIface(adjustediface);
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// Add the hook
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CHook hook(plug, thisptr_offs, handler,
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m_HookIDMan.New(hookManager.GetProto(), hookManager.GetVtblOffs(), hookManager.GetVtblIdx(),
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cur_vfnptr, adjustediface, plug, thisptr_offs, handler, post)
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);
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if (post)
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ifaceinst.GetPostHookList().push_back(hook);
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else
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ifaceinst.GetPreHookList().push_back(hook);
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return hook.GetID();
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}
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bool CSourceHookImpl::RemoveHook(Plugin plug, void *iface, int thisptr_offs, HookManagerPubFunc myHookMan,
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ISHDelegate *handler, bool post)
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{
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// Get info about hook manager and compute adjustediface
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CHookManager tmpHookMan(plug, myHookMan);
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void *adjustediface = reinterpret_cast<void*>(reinterpret_cast<char*>(iface)+thisptr_offs);
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// Loop through all hooks and remove those which match:
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// hookman, vfnptr, iface, plug, adjusted iface, this ptr offs, handler, post
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CVector<int> removehooks;
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m_HookIDMan.FindAllHooks(removehooks, tmpHookMan.GetProto(), tmpHookMan.GetVtblOffs(), tmpHookMan.GetVtblIdx(),
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adjustediface, plug, thisptr_offs, handler, post);
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if (removehooks.empty())
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return false;
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bool status = false;
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for (CVector<int>::iterator iter = removehooks.begin(); iter != removehooks.end(); ++iter)
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{
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if (RemoveHookByID(*iter))
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status = true;
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}
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return status;
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}
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bool CSourceHookImpl::RemoveHookByID(int hookid)
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{
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const CHookIDManager::Entry *hentry;
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hentry = m_HookIDMan.QueryHook(hookid);
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if (!hentry)
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{
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// hookid doesn't exist !
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return false;
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}
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// find vfnptr
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List<CVfnPtr>::iterator vfnptr_iter = m_VfnPtrs.find(hentry->vfnptr);
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if (vfnptr_iter == m_VfnPtrs.end())
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return false;
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// find iface
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List<CIface>::iterator iface_iter = vfnptr_iter->GetIfaceList().find(hentry->adjustediface);
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if (iface_iter == vfnptr_iter->GetIfaceList().end())
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return false;
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// find hook
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List<CHook> &hooks = hentry->post ? iface_iter->GetPostHookList() : iface_iter->GetPreHookList();
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List<CHook>::iterator hook_iter = hooks.find(hookid);
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if (hook_iter == hooks.end())
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return false;
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hook_iter->GetHandler()->DeleteThis();
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// Iterator movage!
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List<CHook>::iterator oldhookiter = hook_iter;
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hook_iter = hooks.erase(hook_iter);
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for (CStack<CHookContext>::iterator ctx_iter = m_ContextStack.begin();
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ctx_iter != m_ContextStack.end(); ++ctx_iter)
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{
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ctx_iter->HookRemoved(oldhookiter, hook_iter);
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}
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if (iface_iter->GetPreHookList().empty() && iface_iter->GetPostHookList().empty())
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{
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// -> Kill all contexts that use it!
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for (CStack<CHookContext>::iterator ctx_iter = m_ContextStack.begin();
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ctx_iter != m_ContextStack.end(); ++ctx_iter)
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{
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ctx_iter->IfaceRemoved(&(*iface_iter));
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}
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// There are no hooks on this iface anymore...
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iface_iter = vfnptr_iter->GetIfaceList().erase(iface_iter);
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if (vfnptr_iter->GetIfaceList().empty())
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{
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// No ifaces at all -> Deactivate the hook
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for (CStack<CHookContext>::iterator ctx_iter = m_ContextStack.begin();
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ctx_iter != m_ContextStack.end(); ++ctx_iter)
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{
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ctx_iter->VfnPtrRemoved(&(*vfnptr_iter));
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}
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RevertAndRemoveVfnPtr(vfnptr_iter);
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}
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}
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m_HookIDMan.Remove(hookid);
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return true;
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}
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List<CVfnPtr>::iterator CSourceHookImpl::RevertAndRemoveVfnPtr(List<CVfnPtr>::iterator vfnptr_iter)
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{
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ICleanupTask *cleanupTask = vfnptr_iter->GetCleanupTask();
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// Some vfnptrs require cleanup.
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// Concrete case: on GCC, when the original vtable entry is not even
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// we generate an even-aligned thunk to call the original function.
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// If the vfnptr is being removed from a pre hook on the vfnptr
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// we have to delay the cleanup of this thunk until the hook loop is done
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// (because the orig function call mechanism is going to use the thunk).
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if (cleanupTask != NULL)
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{
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// If this vfnptr is in use in one of the hook loops running at the moment
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// Schedule it for removal on the DEEPEST hook loop.
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size_t numOfContexts = m_ContextStack.size();
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// m_ContextStack.at(0) is the deepest hook context
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// m_ContextStack.at(size-1) = m_ContextStack.front is the uppermost
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bool cleanupImmedieately = true;
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CVfnPtr *vfnPtrObjAddr = &(*vfnptr_iter);
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for (size_t i = 0; i < numOfContexts; ++i)
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{
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CHookContext &context = m_ContextStack.at(i);
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if (context.pVfnPtr == vfnPtrObjAddr)
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{
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// Found a hook context using this vfnptr at the moment.
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context.m_CleanupTask = cleanupTask;
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cleanupImmedieately = false; // Delay the cleanup
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break;
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}
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}
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if (cleanupImmedieately)
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{
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cleanupTask->CleanupAndDeleteThis();
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}
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}
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// Do the work
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vfnptr_iter->Revert();
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return m_VfnPtrs.erase(vfnptr_iter);
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}
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void CSourceHookImpl::SetRes(META_RES res)
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{
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*m_ContextStack.front().pCurRes = res;
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}
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META_RES CSourceHookImpl::GetPrevRes()
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{
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return *m_ContextStack.front().pPrevRes;
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}
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META_RES CSourceHookImpl::GetStatus()
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{
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return *m_ContextStack.front().pStatus;
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}
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const void *CSourceHookImpl::GetOrigRet()
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{
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return m_ContextStack.front().pOrigRet;
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}
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const void *CSourceHookImpl::GetOverrideRet()
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{
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return (*m_ContextStack.front().pStatus < MRES_OVERRIDE) ?
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NULL : m_ContextStack.front().pOverrideRet;
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}
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void *CSourceHookImpl::GetIfacePtr()
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{
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// If in recall: return last one
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if (m_ContextStack.front().m_State >= CHookContext::State_Recall_Pre &&
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m_ContextStack.front().m_State <= CHookContext::State_Recall_PostVP)
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{
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return m_ContextStack.second().pIfacePtr;
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}
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else
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{
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return m_ContextStack.front().pIfacePtr;
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}
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}
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void *CSourceHookImpl::GetOverrideRetPtr()
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{
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return m_ContextStack.front().pOverrideRet;
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}
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void CSourceHookImpl::UnloadPlugin(Plugin plug, UnloadListener *listener)
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{
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// 1) Remove all hooks by this plugin
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CVector<int> removehooks;
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m_HookIDMan.FindAllHooks(removehooks, plug);
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for (CVector<int>::iterator iter = removehooks.begin(); iter != removehooks.end(); ++iter)
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RemoveHookByID(*iter);
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// 2) Remove all hook managers
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for (CHookManList::iterator iter = m_HookManList.begin(); iter != m_HookManList.end(); )
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{
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if (iter->GetOwnerPlugin() == plug)
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iter = RemoveHookManager(iter);
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else
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++iter;
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}
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// Fix for bug 5034. It's pretty tricky to find whether hookmanagers owned by this
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// plugin are active. We could change how hook managers are tracked in SH, and lazily
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// free them as the context stack drops to 0, or we could change the pubfunc API to
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// know whether it's active or not. Rather than deal with this extra complexity, we
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// just conservatively wait until the context stack hits 0 before unloading.
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if (m_ContextStack.size() == 0)
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{
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listener->ReadyToUnload(plug);
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}
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else
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{
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m_PendingUnloads.push_back(new PendingUnload(listener, plug));
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}
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}
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CHookManList::iterator CSourceHookImpl::RemoveHookManager(CHookManList::iterator hookman_iter)
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{
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// 2) Remove it
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for (CVfnPtrList::iterator vfnptr_iter = m_VfnPtrs.begin();
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vfnptr_iter != m_VfnPtrs.end();)
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{
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if (!vfnptr_iter->HookManRemoved(&(*hookman_iter)))
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{
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// This vfnptr has no more hook managers
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// and asks to be removed.
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m_HookIDMan.RemoveAll(vfnptr_iter->GetPtr());
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vfnptr_iter = RevertAndRemoveVfnPtr(vfnptr_iter);
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}
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else
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{
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++vfnptr_iter;
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}
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}
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return m_HookManList.erase(hookman_iter);
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}
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void CSourceHookImpl::RemoveHookManager(Plugin plug, HookManagerPubFunc pubFunc)
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{
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// Find the hook manager
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CHookManList::iterator hookman_iter = m_HookManList.find(CHookManager::Descriptor(plug, pubFunc));
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if (hookman_iter != m_HookManList.end())
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{
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RemoveHookManager(hookman_iter);
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}
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}
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void CSourceHookImpl::SetIgnoreHooks(void *vfnptr)
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{
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CHookContext ctx;
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ctx.m_State = CHookContext::State_Ignore;
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m_ContextStack.push(ctx);
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}
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void CSourceHookImpl::ResetIgnoreHooks(void *vfnptr)
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{
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if (!m_ContextStack.empty() && m_ContextStack.front().m_State == CHookContext::State_Ignore)
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{
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// Actually use EndContext
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// instead of m_ContextStack.pop directly
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// because it runs the cleanup task if neccesary
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EndContext(&(m_ContextStack.front()));
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}
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}
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void *CSourceHookImpl::GetOrigVfnPtrEntry(void *vfnptr)
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{
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for (CVfnPtrList::iterator vfnptr_iter = m_VfnPtrs.begin(); vfnptr_iter != m_VfnPtrs.end(); ++vfnptr_iter)
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{
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if (vfnptr_iter->GetPtr() == vfnptr)
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return vfnptr_iter->GetOrigEntry();
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}
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return NULL;
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}
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void CSourceHookImpl::DoRecall()
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{
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CHookContext newCtx;
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CHookContext &curCtx = m_ContextStack.front();
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newCtx.m_State = curCtx.m_State + (CHookContext::State_Recall_Pre - CHookContext::State_Pre);
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if (newCtx.m_State == CHookContext::State_Recall_Post || newCtx.m_State == CHookContext::State_Recall_PostVP)
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{
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// Also save orig ret
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newCtx.pOrigRet = curCtx.pOrigRet;
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}
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// The hookfunc usually does this, but it won't have a chance to see it,
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// so for recalls, we update status here if it's required
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if (*curCtx.pCurRes > *curCtx.pStatus)
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*curCtx.pStatus = *curCtx.pCurRes;
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newCtx.pStatus = curCtx.pStatus;
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newCtx.pOverrideRet = curCtx.pOverrideRet;
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newCtx.pPrevRes = curCtx.pPrevRes;
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newCtx.m_Iter = curCtx.m_Iter;
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// Take this with us!
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newCtx.pCurRes = curCtx.pCurRes;
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m_ContextStack.push(newCtx);
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curCtx.m_State = CHookContext::State_Dead;
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}
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IHookContext *CSourceHookImpl::SetupHookLoop(IHookManagerInfo *hi, void *vfnptr, void *thisptr, void **origCallAddr, META_RES *statusPtr,
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META_RES *prevResPtr, META_RES *curResPtr, const void *origRetPtr, void *overrideRetPtr)
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{
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CHookContext *pCtx = NULL;
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CHookContext *oldctx = m_ContextStack.empty() ? NULL : &m_ContextStack.front();
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if (oldctx)
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{
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// SH_CALL
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if (oldctx->m_State == CHookContext::State_Ignore)
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{
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*statusPtr = MRES_IGNORED;
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oldctx->m_CallOrig = true;
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oldctx->m_State = CHookContext::State_Dead;
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List<CVfnPtr*> &vfnptr_list = static_cast<CHookManager*>(hi)->GetVfnPtrList();
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List<CVfnPtr*>::iterator vfnptr_iter;
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for (vfnptr_iter = vfnptr_list.begin();
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vfnptr_iter != vfnptr_list.end(); ++vfnptr_iter)
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{
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if (**vfnptr_iter == vfnptr)
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break;
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}
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if (vfnptr_iter == vfnptr_list.end())
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{
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SH_ASSERT(false, ("How can a hook exist on a vfnptr which we don't have in our db?!"));
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}
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else
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{
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*origCallAddr = (*vfnptr_iter)->GetOrigCallAddr();
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oldctx->pVfnPtr = *vfnptr_iter;
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}
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oldctx->pOrigRet = origRetPtr;
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return oldctx;
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}
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// Recall
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else if (oldctx->m_State >= CHookContext::State_Recall_Pre &&
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oldctx->m_State <= CHookContext::State_Recall_PostVP)
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{
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pCtx = oldctx;
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*statusPtr = *(oldctx->pStatus);
|
|
*prevResPtr = *(oldctx->pPrevRes);
|
|
|
|
pCtx->m_Iter = oldctx->m_Iter;
|
|
|
|
// Only have possibility of calling the orig func in pre recall mode
|
|
pCtx->m_CallOrig = (oldctx->m_State == CHookContext::State_Recall_Pre ||
|
|
oldctx->m_State == CHookContext::State_Recall_PreVP);
|
|
|
|
overrideRetPtr = pCtx->pOverrideRet;
|
|
|
|
// When the status is low so there's no override return value and we're in a post recall,
|
|
// give it the orig return value as override return value.
|
|
if (pCtx->m_State == CHookContext::State_Recall_Post ||
|
|
pCtx->m_State == CHookContext::State_Recall_PostVP)
|
|
{
|
|
origRetPtr = oldctx->pOrigRet;
|
|
if (*statusPtr < MRES_OVERRIDE)
|
|
overrideRetPtr = const_cast<void*>(pCtx->pOrigRet);
|
|
}
|
|
}
|
|
}
|
|
if (!pCtx)
|
|
{
|
|
pCtx = m_ContextStack.make_next();
|
|
pCtx->m_State = CHookContext::State_Born;
|
|
pCtx->m_CallOrig = true;
|
|
}
|
|
|
|
pCtx->pIface = NULL;
|
|
|
|
List<CVfnPtr*> &vfnptr_list = static_cast<CHookManager*>(hi)->GetVfnPtrList();
|
|
List<CVfnPtr*>::iterator vfnptr_iter;
|
|
for (vfnptr_iter = vfnptr_list.begin();
|
|
vfnptr_iter != vfnptr_list.end(); ++vfnptr_iter)
|
|
{
|
|
if (**vfnptr_iter == vfnptr)
|
|
break;
|
|
}
|
|
if (vfnptr_iter == vfnptr_list.end())
|
|
{
|
|
pCtx->m_State = CHookContext::State_Dead;
|
|
}
|
|
else
|
|
{
|
|
pCtx->pVfnPtr = *vfnptr_iter;
|
|
*origCallAddr = pCtx->pVfnPtr->GetOrigCallAddr();
|
|
pCtx->pIface = pCtx->pVfnPtr->FindIface(thisptr);
|
|
}
|
|
|
|
pCtx->pStatus = statusPtr;
|
|
pCtx->pPrevRes = prevResPtr;
|
|
pCtx->pCurRes = curResPtr;
|
|
pCtx->pThisPtr = thisptr;
|
|
pCtx->pOverrideRet = overrideRetPtr;
|
|
pCtx->pOrigRet = origRetPtr;
|
|
|
|
return pCtx;
|
|
}
|
|
|
|
void CSourceHookImpl::ResolvePendingUnloads(bool force)
|
|
{
|
|
List<PendingUnload *>::iterator iter = m_PendingUnloads.begin();
|
|
while (iter != m_PendingUnloads.end())
|
|
{
|
|
PendingUnload *unload = *iter;
|
|
|
|
if (!force && !unload->deactivated())
|
|
{
|
|
// Unless being forced, wait one drop of the context stack
|
|
// before actually unloading. Otherwise, we'll still return
|
|
// to unloaded memory.
|
|
unload->deactivate();
|
|
iter++;
|
|
}
|
|
else
|
|
{
|
|
unload->listener()->ReadyToUnload(unload->plugin());
|
|
delete unload;
|
|
iter = m_PendingUnloads.erase(iter);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CSourceHookImpl::EndContext(IHookContext *pCtx)
|
|
{
|
|
// Do clean up task, if any is associated with this context
|
|
m_ContextStack.front().DoCleanupTaskAndDeleteIt();
|
|
// Then remove it
|
|
m_ContextStack.pop();
|
|
|
|
// If we've reached 0 contexts and there are pending unloads,
|
|
// resolve them now.
|
|
if (m_ContextStack.size() == 0 && m_PendingUnloads.size() != 0)
|
|
ResolvePendingUnloads();
|
|
}
|
|
|
|
void CSourceHookImpl::CompleteShutdown()
|
|
{
|
|
CVector<int> removehooks;
|
|
m_HookIDMan.FindAllHooks(removehooks);
|
|
|
|
for (CVector<int>::iterator iter = removehooks.begin(); iter != removehooks.end(); ++iter)
|
|
RemoveHookByID(*iter);
|
|
}
|
|
|
|
void CSourceHookImpl::PausePlugin(Plugin plug)
|
|
{
|
|
CVector<int> pausehooks;
|
|
m_HookIDMan.FindAllHooks(pausehooks, plug);
|
|
|
|
for (CVector<int>::iterator iter = pausehooks.begin(); iter != pausehooks.end(); ++iter)
|
|
PauseHookByID(*iter);
|
|
}
|
|
|
|
void CSourceHookImpl::UnpausePlugin(Plugin plug)
|
|
{
|
|
CVector<int> unpausehooks;
|
|
m_HookIDMan.FindAllHooks(unpausehooks, plug);
|
|
|
|
for (CVector<int>::iterator iter = unpausehooks.begin(); iter != unpausehooks.end(); ++iter)
|
|
UnpauseHookByID(*iter);
|
|
}
|
|
|
|
bool CSourceHookImpl::PauseHookByID(int hookid)
|
|
{
|
|
return SetHookPaused(hookid, true);
|
|
}
|
|
|
|
bool CSourceHookImpl::UnpauseHookByID(int hookid)
|
|
{
|
|
return SetHookPaused(hookid, false);
|
|
}
|
|
|
|
bool CSourceHookImpl::SetHookPaused(int hookid, bool paused)
|
|
{
|
|
const CHookIDManager::Entry *hentry;
|
|
|
|
hentry = m_HookIDMan.QueryHook(hookid);
|
|
if (!hentry)
|
|
{
|
|
// hookid doesn't exist !
|
|
return false;
|
|
}
|
|
|
|
// find vfnptr
|
|
List<CVfnPtr>::iterator vfnptr_iter = m_VfnPtrs.find(hentry->vfnptr);
|
|
if (vfnptr_iter == m_VfnPtrs.end())
|
|
return false;
|
|
|
|
// find iface
|
|
List<CIface>::iterator iface_iter = vfnptr_iter->GetIfaceList().find(hentry->adjustediface);
|
|
if (iface_iter == vfnptr_iter->GetIfaceList().end())
|
|
return false;
|
|
|
|
// find hook
|
|
List<CHook> &hooks = hentry->post ? iface_iter->GetPostHookList() : iface_iter->GetPreHookList();
|
|
List<CHook>::iterator hook_iter = hooks.find(hookid);
|
|
if (hook_iter == hooks.end())
|
|
return false;
|
|
|
|
hook_iter->SetPaused(paused);
|
|
return true;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// CHookContext
|
|
//////////////////////////////////////////////////////////////////////////
|
|
ISHDelegate *CHookContext::GetNext()
|
|
{
|
|
CIface *pVPIface;
|
|
switch (m_State)
|
|
{
|
|
case State_Dead:
|
|
return NULL;
|
|
|
|
case State_Born:
|
|
m_Iter = List<CHook>::iterator();
|
|
m_State = State_Pre;
|
|
|
|
// fall-through
|
|
case State_Recall_Pre:
|
|
m_State = State_Pre;
|
|
case State_Pre:
|
|
if (pIface)
|
|
{
|
|
if (!m_Iter)
|
|
m_Iter = pIface->GetPreHookList().begin();
|
|
else
|
|
++m_Iter;
|
|
SkipPaused(m_Iter, pIface->GetPreHookList());
|
|
|
|
if (m_Iter != pIface->GetPreHookList().end())
|
|
{
|
|
pIfacePtr = reinterpret_cast<void*>(reinterpret_cast<char*>(pThisPtr) - m_Iter->GetThisPointerOffset());
|
|
return m_Iter->GetHandler();
|
|
}
|
|
}
|
|
|
|
// end of normal hooks -> VP
|
|
|
|
m_State = State_PreVP;
|
|
m_Iter = List<CHook>::iterator();
|
|
|
|
// fall-through
|
|
case State_Recall_PreVP:
|
|
m_State = State_PreVP;
|
|
case State_PreVP:
|
|
pVPIface = pVfnPtr->FindIface(NULL);
|
|
if (pVPIface)
|
|
{
|
|
if (!m_Iter)
|
|
m_Iter = pVPIface->GetPreHookList().begin();
|
|
else
|
|
++m_Iter;
|
|
SkipPaused(m_Iter, pVPIface->GetPreHookList());
|
|
|
|
if (m_Iter != pVPIface->GetPreHookList())
|
|
{
|
|
pIfacePtr = reinterpret_cast<void*>(reinterpret_cast<char*>(pThisPtr) - m_Iter->GetThisPointerOffset());
|
|
return m_Iter->GetHandler();
|
|
}
|
|
}
|
|
|
|
// end VP hooks -> orig call
|
|
|
|
m_State = State_OrigCall;
|
|
return NULL;
|
|
|
|
case State_OrigCall:
|
|
m_Iter = List<CHook>::iterator();
|
|
m_State = State_Post;
|
|
|
|
// fall-through
|
|
case State_Post:
|
|
if (pIface)
|
|
{
|
|
if (!m_Iter)
|
|
m_Iter = pIface->GetPostHookList().begin();
|
|
else
|
|
++m_Iter;
|
|
SkipPaused(m_Iter, pIface->GetPostHookList());
|
|
|
|
if (m_Iter != pIface->GetPostHookList().end())
|
|
{
|
|
pIfacePtr = reinterpret_cast<void*>(reinterpret_cast<char*>(pThisPtr) - m_Iter->GetThisPointerOffset());
|
|
return m_Iter->GetHandler();
|
|
}
|
|
}
|
|
// end of normal hooks -> VP
|
|
|
|
m_State = State_PostVP;
|
|
m_Iter = List<CHook>::iterator();
|
|
|
|
// fall-through
|
|
case State_PostVP:
|
|
pVPIface = pVfnPtr->FindIface(NULL);
|
|
if (pVPIface)
|
|
{
|
|
if (!m_Iter)
|
|
m_Iter = pVPIface->GetPostHookList().begin();
|
|
else
|
|
++m_Iter;
|
|
SkipPaused(m_Iter, pVPIface->GetPostHookList());
|
|
|
|
if (m_Iter != pVPIface->GetPostHookList())
|
|
{
|
|
pIfacePtr = reinterpret_cast<void*>(reinterpret_cast<char*>(pThisPtr) - m_Iter->GetThisPointerOffset());
|
|
return m_Iter->GetHandler();
|
|
}
|
|
}
|
|
|
|
// end VP hooks -> done
|
|
|
|
m_State = State_Dead;
|
|
return NULL;
|
|
|
|
case State_Recall_Post:
|
|
// Skip pre hooks _and_ orig call
|
|
m_State = State_Post;
|
|
return NULL;
|
|
|
|
case State_Recall_PostVP:
|
|
// Skip pre hooks _and_ orig call
|
|
m_State = State_PostVP;
|
|
return NULL;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void *CHookContext::GetOverrideRetPtr()
|
|
{
|
|
return pOverrideRet;
|
|
}
|
|
|
|
const void *CHookContext::GetOrigRetPtr()
|
|
{
|
|
return pOrigRet;
|
|
}
|
|
|
|
bool CHookContext::ShouldCallOrig()
|
|
{
|
|
return m_CallOrig;
|
|
}
|
|
|
|
void CHookContext::HookRemoved(List<CHook>::iterator oldhookiter, List<CHook>::iterator nexthookiter)
|
|
{
|
|
if (m_Iter == oldhookiter)
|
|
{
|
|
m_Iter = nexthookiter;
|
|
--m_Iter;
|
|
}
|
|
}
|
|
|
|
void CHookContext::IfaceRemoved(CIface *iface)
|
|
{
|
|
if (pIface == iface)
|
|
pIface = NULL;
|
|
}
|
|
|
|
void CHookContext::VfnPtrRemoved(CVfnPtr *vfnptr)
|
|
{
|
|
if (pVfnPtr == vfnptr)
|
|
{
|
|
// Don't set pVfnPtr = NULL here!
|
|
// It may be used still.
|
|
// RevertAndRemoveVfnPtr uses it to find the hook context
|
|
// to which to attach the cleanup task of the vfnptr.
|
|
|
|
//pVfnPtr = NULL;
|
|
m_State = State_Dead;
|
|
}
|
|
}
|
|
|
|
void CHookContext::DoCleanupTaskAndDeleteIt()
|
|
{
|
|
if (m_CleanupTask != NULL)
|
|
{
|
|
m_CleanupTask->CleanupAndDeleteThis();
|
|
}
|
|
}
|
|
}
|
|
}
|