I have the below C# definitions and function call to an unsafe C++/CLI
function in an external dll. When debugging the calls step by step everything
seems to work, but if I just run everything through without stopping I get
the following error:
"
Debug Assertion Failed!
Program: .....myprogram. .
File: dbgheap.c
Line: 1279
Expression: _CrtIsValidHeap Pointer(pUserDa ta)
....
"
If I press ignore three times the whole application crashes. Here is the code:
[DllImport(g_wra pper_dll_path)]
unsafe static extern int GetEncoders(
void* dvpsdk,
ref int[] devices_ids);
IntPtr m_DVPSDK_ptr;
void* l_ptr = m_DVPSDK_ptr.To Pointer();
int l_result = GetEncoders(
l_ptr,
ref m_devs_ids);
The C++/CLI functions:
extern "C" int GetEncoders(
System::IntPtr dvpsdk,
array<int>^ devices_ids)
{
return AdvantechImpl:: GetEncoders(
(DVP1412DLL*) dvpsdk.ToPointe r(),
devices_ids);
}
const int GetEncoders(
DVP1412DLL* dvpsdk,
array<int>^ devices_ids)
{
int l_nr_of_devices =
dvpsdk->DVP1412_GetNoO fDevices();
if (l_nr_of_device s == 0)
{
return -3;
}
int* l_tmp = new int[devices_ids->Length];
int l_res = dvpsdk->DVP1412_InitSD K(
l_nr_of_devices ,
l_tmp);
if (l_res == SUCCEEDED)
{
for (int l_i = 0; l_i < devices_ids->Length; ++l_i)
{
devices_ids[l_i] = l_tmp[l_i];
}
l_res = dvpsdk->DVP1412_CloseS DK();
return l_nr_of_devices ;
}
else
{
return l_res;
}
} 2 2291
I should add that m_devs_ids has the following definition:
[MarshalAs(Unman agedType.ByValA rray, SizeConst = g_max_devices)]
int[] m_devs_ids = new int[g_max_devices];
"Joachim" wrote:
I have the below C# definitions and function call to an unsafe C++/CLI
function in an external dll. When debugging the calls step by step everything
seems to work, but if I just run everything through without stopping I get
the following error:
"
Debug Assertion Failed!
Program: .....myprogram. .
File: dbgheap.c
Line: 1279
Expression: _CrtIsValidHeap Pointer(pUserDa ta)
...
"
If I press ignore three times the whole application crashes. Here is the code:
[DllImport(g_wra pper_dll_path)]
unsafe static extern int GetEncoders(
void* dvpsdk,
ref int[] devices_ids);
IntPtr m_DVPSDK_ptr;
void* l_ptr = m_DVPSDK_ptr.To Pointer();
int l_result = GetEncoders(
l_ptr,
ref m_devs_ids);
The C++/CLI functions:
extern "C" int GetEncoders(
System::IntPtr dvpsdk,
array<int>^ devices_ids)
{
return AdvantechImpl:: GetEncoders(
(DVP1412DLL*) dvpsdk.ToPointe r(),
devices_ids);
}
const int GetEncoders(
DVP1412DLL* dvpsdk,
array<int>^ devices_ids)
{
int l_nr_of_devices =
dvpsdk->DVP1412_GetNoO fDevices();
if (l_nr_of_device s == 0)
{
return -3;
}
int* l_tmp = new int[devices_ids->Length];
int l_res = dvpsdk->DVP1412_InitSD K(
l_nr_of_devices ,
l_tmp);
if (l_res == SUCCEEDED)
{
for (int l_i = 0; l_i < devices_ids->Length; ++l_i)
{
devices_ids[l_i] = l_tmp[l_i];
}
l_res = dvpsdk->DVP1412_CloseS DK();
return l_nr_of_devices ;
}
else
{
return l_res;
}
}
"Joachim" <Jo*****@discus sions.microsoft .comwrote in message
news:19******** *************** ***********@mic rosoft.com...
>I have the below C# definitions and function call to an unsafe C++/CLI
function in an external dll. When debugging the calls step by step
everything
seems to work, but if I just run everything through without stopping I get
the following error:
"
Debug Assertion Failed!
Program: .....myprogram. .
File: dbgheap.c
Line: 1279
Expression: _CrtIsValidHeap Pointer(pUserDa ta)
...
"
If I press ignore three times the whole application crashes. Here is the
code:
[DllImport(g_wra pper_dll_path)]
unsafe static extern int GetEncoders(
void* dvpsdk,
ref int[] devices_ids);
IntPtr m_DVPSDK_ptr;
void* l_ptr = m_DVPSDK_ptr.To Pointer();
int l_result = GetEncoders(
l_ptr,
ref m_devs_ids);
The C++/CLI functions:
extern "C" int GetEncoders(
System::IntPtr dvpsdk,
array<int>^ devices_ids)
{
return AdvantechImpl:: GetEncoders(
(DVP1412DLL*) dvpsdk.ToPointe r(),
devices_ids);
}
const int GetEncoders(
DVP1412DLL* dvpsdk,
array<int>^ devices_ids)
{
int l_nr_of_devices =
dvpsdk->DVP1412_GetNoO fDevices();
if (l_nr_of_device s == 0)
{
return -3;
}
int* l_tmp = new int[devices_ids->Length];
int l_res = dvpsdk->DVP1412_InitSD K(
l_nr_of_devices ,
l_tmp);
When l_nr_of_devices devices_ids->Length, this function overflows the
buffer and corrupts the heap.
Also, where is l_tmp freed (you must call delete[])?
>
if (l_res == SUCCEEDED)
{
for (int l_i = 0; l_i < devices_ids->Length; ++l_i)
{
devices_ids[l_i] = l_tmp[l_i];
}
l_res = dvpsdk->DVP1412_CloseS DK();
return l_nr_of_devices ;
}
else
{
return l_res;
}
} This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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