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[Dhooks] Add the ability to work with the this parameter, which is an object #2219

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2d008c1
Update natives.cpp
A1mDev Nov 11, 2024
a262653
Merge branch 'master' into dhooks-update
A1mDev Nov 11, 2024
9c07ebe
Update dhooks.inc
A1mDev Nov 11, 2024
358eef1
Non-working code commented out
A1mDev Nov 11, 2024
945499b
Update natives.cpp
A1mDev Nov 19, 2024
88024a7
Allow working with the parameter "this", which is a class CBaseEntity
A1mDev Nov 19, 2024
6eb540a
Enable check for calling convention
A1mDev Dec 30, 2024
5da5325
Allow working with the parameter 'this', which is the class gamerules
A1mDev Dec 30, 2024
f9d175c
Remove duplicate code, move it to a separate function
A1mDev Oct 24, 2025
220cc71
Fixed a compilation error and refactored code.
A1mDev Oct 24, 2025
1a92640
Merge branch 'master' into dhooks-update
A1mDev Oct 25, 2025
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1 change: 1 addition & 0 deletions extensions/dhooks/dynhooks_sourcepawn.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -532,6 +532,7 @@ CDynamicHooksSourcePawn::CDynamicHooksSourcePawn(HookSetup *setup, CHook *pDetou
this->hookType = setup->hookType;
this->m_pDetour = pDetour;
this->callConv = setup->callConv;
this->thisFuncCallConv = setup->callConv;
}

HookReturnStruct *CDynamicHooksSourcePawn::GetReturnStruct()
Expand Down
185 changes: 140 additions & 45 deletions extensions/dhooks/natives.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1096,20 +1096,39 @@ cell_t Native_GetParamObjectPtrVar(IPluginContext *pContext, const cell_t *param
return 0;
}

if(params[2] <= 0 || params[2] > (int)paramStruct->dg->params.size())
void *addr = NULL;

if(params[2] != 0)
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}
if(params[2] < 0 || params[2] > (int)paramStruct->dg->params.size())
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}

int index = params[2] - 1;
int index = params[2] - 1;

if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
}

size_t offset = GetParamOffset(paramStruct, index);
addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
}
else
{
if(paramStruct->dg->thisFuncCallConv != CallConv_THISCALL)
{
return pContext->ThrowNativeError("Parameter 'this' is only available in member functions, specify the calling convention type 'thiscall'");
}

if(paramStruct->dg->thisType != ThisPointer_Address && paramStruct->dg->thisType != ThisPointer_CBaseEntity && !(paramStruct->dg->thisType == ThisPointer_Ignore && paramStruct->dg->hookType == HookType_GameRules))
{
return pContext->ThrowNativeError("Parameter 'this' is not specified as an address, it is not available");
}

size_t offset = GetParamOffset(paramStruct, index);
void *addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
addr = g_SHPtr->GetIfacePtr();
}

switch((ObjectValueType)params[4])
{
Expand Down Expand Up @@ -1167,20 +1186,39 @@ cell_t Native_SetParamObjectPtrVar(IPluginContext *pContext, const cell_t *param
return 0;
}

if(params[2] <= 0 || params[2] > (int)paramStruct->dg->params.size())
void *addr = NULL;

if(params[2] != 0)
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}
if(params[2] < 0 || params[2] > (int)paramStruct->dg->params.size())
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}

int index = params[2] - 1;
int index = params[2] - 1;

if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
}

size_t offset = GetParamOffset(paramStruct, index);
addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
}
else
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
if(paramStruct->dg->thisFuncCallConv != CallConv_THISCALL)
{
return pContext->ThrowNativeError("Parameter 'this' is only available in member functions, specify the calling convention type 'thiscall'");
}

if(paramStruct->dg->thisType != ThisPointer_Address && paramStruct->dg->thisType != ThisPointer_CBaseEntity && !(paramStruct->dg->thisType == ThisPointer_Ignore && paramStruct->dg->hookType == HookType_GameRules))
{
return pContext->ThrowNativeError("Parameter 'this' is not specified as an address, it is not available");
}

addr = g_SHPtr->GetIfacePtr();
}

size_t offset = GetParamOffset(paramStruct, index);
void *addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);

switch((ObjectValueType)params[4])
{
Expand Down Expand Up @@ -1252,20 +1290,39 @@ cell_t Native_GetParamObjectPtrVarVector(IPluginContext *pContext, const cell_t
return 0;
}

if(params[2] <= 0 || params[2] > (int)paramStruct->dg->params.size())
void *addr = NULL;

if(params[2] != 0)
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}
if(params[2] < 0 || params[2] > (int)paramStruct->dg->params.size())
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}

int index = params[2] - 1;
int index = params[2] - 1;

if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
}

size_t offset = GetParamOffset(paramStruct, index);
addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
}
else
{
if(paramStruct->dg->thisFuncCallConv != CallConv_THISCALL)
{
return pContext->ThrowNativeError("Parameter 'this' is only available in member functions, specify the calling convention type 'thiscall'");
}

size_t offset = GetParamOffset(paramStruct, index);
void *addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
if(paramStruct->dg->thisType != ThisPointer_Address && paramStruct->dg->thisType != ThisPointer_CBaseEntity && !(paramStruct->dg->thisType == ThisPointer_Ignore && paramStruct->dg->hookType == HookType_GameRules))
{
return pContext->ThrowNativeError("Parameter 'this' is not specified as an address, it is not available");
}

addr = g_SHPtr->GetIfacePtr();
}

cell_t *buffer;
pContext->LocalToPhysAddr(params[5], &buffer);
Expand Down Expand Up @@ -1305,21 +1362,40 @@ cell_t Native_SetParamObjectPtrVarVector(IPluginContext *pContext, const cell_t
{
return 0;
}

void *addr = NULL;

if(params[2] <= 0 || params[2] > (int)paramStruct->dg->params.size())
if(params[2] != 0)
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}
if(params[2] < 0 || params[2] > (int)paramStruct->dg->params.size())
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}

int index = params[2] - 1;
int index = params[2] - 1;

if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
}

size_t offset = GetParamOffset(paramStruct, index);
addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
}
else
{
if(paramStruct->dg->thisFuncCallConv != CallConv_THISCALL)
{
return pContext->ThrowNativeError("Parameter 'this' is only available in member functions, specify the calling convention type 'thiscall'");
}

size_t offset = GetParamOffset(paramStruct, index);
void *addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
if(paramStruct->dg->thisType != ThisPointer_Address && paramStruct->dg->thisType != ThisPointer_CBaseEntity && !(paramStruct->dg->thisType == ThisPointer_Ignore && paramStruct->dg->hookType == HookType_GameRules))
{
return pContext->ThrowNativeError("Parameter 'this' is not specified as an address, it is not available");
}

addr = g_SHPtr->GetIfacePtr();
}

cell_t *buffer;
pContext->LocalToPhysAddr(params[5], &buffer);
Expand Down Expand Up @@ -1359,20 +1435,39 @@ cell_t Native_GetParamObjectPtrString(IPluginContext *pContext, const cell_t *pa
return 0;
}

if(params[2] <= 0 || params[2] > (int)paramStruct->dg->params.size())
void *addr = NULL;

if(params[2] != 0)
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}
if(params[2] <= 0 || params[2] > (int)paramStruct->dg->params.size())
{
return pContext->ThrowNativeError("Invalid param number %i max params is %i", params[2], paramStruct->dg->params.size());
}

int index = params[2] - 1;
int index = params[2] - 1;

if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
if(paramStruct->dg->params.at(index).type != HookParamType_ObjectPtr && paramStruct->dg->params.at(index).type != HookParamType_Object)
{
return pContext->ThrowNativeError("Invalid object value type %i", paramStruct->dg->params.at(index).type);
}

size_t offset = GetParamOffset(paramStruct, index);
addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
}
else
{
if(paramStruct->dg->thisFuncCallConv != CallConv_THISCALL)
{
return pContext->ThrowNativeError("Parameter 'this' is only available in member functions, specify the calling convention type 'thiscall'");
}

size_t offset = GetParamOffset(paramStruct, index);
void *addr = GetObjectAddr(paramStruct->dg->params.at(index).type, paramStruct->dg->params.at(index).flags, paramStruct->orgParams, offset);
if(paramStruct->dg->thisType != ThisPointer_Address && paramStruct->dg->thisType != ThisPointer_CBaseEntity && !(paramStruct->dg->thisType == ThisPointer_Ignore && paramStruct->dg->hookType == HookType_GameRules))
{
return pContext->ThrowNativeError("Parameter 'this' is not specified as an address, it is not available");
}

addr = g_SHPtr->GetIfacePtr();
}

switch((ObjectValueType)params[4])
{
Expand Down
1 change: 1 addition & 0 deletions extensions/dhooks/vhook.h
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -162,6 +162,7 @@ class DHooksInfo
int entity;
ThisPointerType thisType;
HookType hookType;
CallingConvention thisFuncCallConv;
};

class DHooksCallback : public SourceHook::ISHDelegate, public DHooksInfo
Expand Down
20 changes: 10 additions & 10 deletions plugins/include/dhooks.inc
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Original file line number Diff line number Diff line change
Expand Up @@ -310,7 +310,7 @@ methodmap DHookParam < Handle

// Gets an object's variable value.
//
// @param num Parameter number to get, starting at 1.
// @param num Parameter number to get, 0 for param "this", other parameters start from 1
// @param offset Byte offset within the object to the var to get.
// @param type Type of var it is.
//
Expand All @@ -320,7 +320,7 @@ methodmap DHookParam < Handle

// Gets an object's vector variable value.
//
// @param num Parameter number to get, starting at 1.
// @param num Parameter number to get, 0 for param "this", other parameters start from 1.
// @param offset Byte offset within the object to the var to get.
// @param type Type of var it is.
// @param vec Buffer to store the result vector.
Expand All @@ -330,7 +330,7 @@ methodmap DHookParam < Handle

// Gets an object's string variable value.
//
// @param num Parameter number to get, starting at 1.
// @param num Parameter number to get, 0 for param "this", other parameters start from 1.
// @param offset Byte offset within the object to the var to get.
// @param type Type of var it is.
// @param buffer Buffer to store the result string.
Expand All @@ -344,7 +344,7 @@ methodmap DHookParam < Handle
// The changes are only applied when MRES_ChangedHandled or MRES_ChangedOverride
// is returned in the callback.
//
// @param num Parameter number to set, starting at 1.
// @param num Parameter number to set, 0 for param "this", other parameters start from 1.
// @param offset Byte offset within the object to the var to set.
// @param type Type of var it is.
// @param value The value to set the var to.
Expand All @@ -357,7 +357,7 @@ methodmap DHookParam < Handle
// The changes are only applied when MRES_ChangedHandled or MRES_ChangedOverride
// is returned in the callback.
//
// @param num Parameter number to set, starting at 1.
// @param num Parameter number to set, 0 for param "this", other parameters start from 1.
// @param offset Byte offset within the object to the var to set.
// @param type Type of var it is.
// @param vec The value to set the vector var to.
Expand Down Expand Up @@ -928,7 +928,7 @@ native void DHookSetReturnString(Handle hReturn, char[] value);
* Gets an objects variable value
*
* @param hParams Handle to params structure
* @param num Param number to get.
* @param num Param number to get, 0 for param "this".
* @param offset Offset within the object to the var to get.
* @param type Type of var it is
*
Expand All @@ -941,7 +941,7 @@ native any DHookGetParamObjectPtrVar(Handle hParams, int num, int offset, Object
* Sets an objects variable value
*
* @param hParams Handle to params structure
* @param num Param number to set.
* @param num Param number to set, 0 for param "this".
* @param offset Offset within the object to the var to set.
* @param type Type of var it is
* @param value The value to set the var to.
Expand All @@ -954,7 +954,7 @@ native void DHookSetParamObjectPtrVar(Handle hParams, int num, int offset, Objec
* Gets an objects vector variable value
*
* @param hParams Handle to params structure
* @param num Param number to get.
* @param num Param number to get, 0 for param "this".
* @param offset Offset within the object to the var to get.
* @param type Type of var it is
* @param buffer Buffer to store the result vector
Expand All @@ -967,7 +967,7 @@ native void DHookGetParamObjectPtrVarVector(Handle hParams, int num, int offset,
* Sets an objects vector variable value
*
* @param hParams Handle to params structure
* @param num Param number to set.
* @param num Param number to set, 0 for param "this".
* @param offset Offset within the object to the var to set.
* @param type Type of var it is
* @param value The value to set the vector var to.
Expand All @@ -980,7 +980,7 @@ native void DHookSetParamObjectPtrVarVector(Handle hParams, int num, int offset,
* Gets an objects string variable value
*
* @param hParams Handle to params structure
* @param num Param number to get.
* @param num Param number to get, 0 for param "this".
* @param offset Offset within the object to the var to get.
* @param type Type of var it is
* @param buffer Buffer to store the result vector
Expand Down
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