Why does VS2005 skip execution of lines when debugging managed C++ without optimizations?
- by Sakin
I ran into a rather odd behavior that I don't even know how to start describing.
I wrote a piece of managed C++ code that makes calls to native methods.
A (very) simplified version of the code would look like this (I know it looks like a full native function, just assume there is managed stuff being done all over the place):
int somefunction(ptrHolder x)
{
// the accessptr method returns a native pointer
if (x.accessptr() != nullptr) // I tried this with nullptr, NULL, 0)
{
try
{
x->doSomeNativeVeryImportantStuff(); // or whatever, doesn't matter
}
catch (SomeCustomExceptionClass &)
{
return 0;
}
}
SomeOtherNativeClass::doStaticMagic();
return 1;
}
I compiled this code without optimizations using the /clr flag (VS.NET 2005, SP2) and when running it in the debugger I get to the if statement, since the pointer is actually null, I don't enter the if, but surprisingly, the cursor jumps directly to the return 1 statement, ignoring the doStaticMagic() method completely!!!
When looking at the assembly code, I see that it really jumps directly to that line.
If I force the debugger to enter the if block, I also jump to the return 1 statement after I press F10.
Any ideas why this is happening?
Thanks,
Ariel
