Unmanaged code Debugger problem

[Paolo Pagano]

I have a VS2005 solution with two projects:

1) a .net windows forms application (which references)

2) a managed C++ CLR library (using MFC ia a Shared DLL) .

In one C++ managed class, calling unmanaged code like the one below, the
debugger jumps back an forward

on wrong source lines, making the debug impossible! Having a lot of legacy
code like this, it's a big problem.

This crazy behaviour arise instantiating a 'COleVariant' on the stack!

(ok, this old macro-based error managenment has it's role..)

Any workaround (noting that you can only slightly modify the unmanaged
code)?



// ManagedClass.cpp
....

#define CHECK_FAIL(stmt) if( FAILED(hr = (stmt)) ) return hr; else

long funct( long p ) { return 0; }

HRESULT RunTest( COleVariant& v )
{
HRESULT hr = S_OK;
COleVariant ole; // remove this line to solve!

if( v.lVal == 0 ) // put here a breakpoint, then step over

CHECK_FAIL( funct( 1 ) );
else
CHECK_FAIL( funct( 10 ) );

CHECK_FAIL( funct( 0 ) );

return hr;

} //



void ManagedClass::Run()
{
COleVariant ole( 0l );
RunTest( ole );

} //

[Ben Voigt]

"Paolo Pagano" <pp*****@userportal.netwrote in message
news:%2***************@TK2MSFTNGP06.phx.gbl...

>I have a VS2005 solution with two projects:

1) a .net windows forms application (which references)

2) a managed C++ CLR library (using MFC ia a Shared DLL) .

In one C++ managed class, calling unmanaged code like the one below, the
debugger jumps back an forward

on wrong source lines, making the debug impossible! Having a lot of legacy
code like this, it's a big problem.

This crazy behaviour arise instantiating a 'COleVariant' on the stack!

(ok, this old macro-based error managenment has it's role..)

Any workaround (noting that you can only slightly modify the unmanaged
code)?



// ManagedClass.cpp
...

#define CHECK_FAIL(stmt) if( FAILED(hr = (stmt)) ) return hr; else

"else" is useless

Note that return statement can cause destructors to run...

>
long funct( long p ) { return 0; }

HRESULT RunTest( COleVariant& v )
{
HRESULT hr = S_OK;
COleVariant ole; // remove this line to solve!

and I think COleVariant has a destructor.

>
if( v.lVal == 0 ) // put here a breakpoint, then step over

CHECK_FAIL( funct( 1 ) );
else
CHECK_FAIL( funct( 10 ) );

CHECK_FAIL( funct( 0 ) );

return hr;

} //



void ManagedClass::Run()
{
COleVariant ole( 0l );
RunTest( ole );

} //