Re: obtaining callstack level
* seannakasone@yahoo.com:
Is there a way to get the callstack level in c++? for example, take
the following code:
void call3() {
//callstack level would be 3
}
void call2() {
//callstack level would be 2
call3();
}
int main() {
//callstack level would be 1
call2();
return 0;
}
And I don't mean obtaining it from using a debugger and looking at the
callstack. I'm mean obtaining it programmatically.
Instrument the functions, that is, add code that maintains a call stack
level count.
That can easily be done via the construction and destruction of a local
object in each function.
For example, off the cuff,
class CallTracer
{
private:
static std::size_t& theLevel()
{
static std::size_t theLevelVariable = 0;
return theLevelVariable;
}
public:
CallTracer(){ ++theLevel(); }
~CallTracer(){ --theLevel(); }
static std::size_t level() { return theLevel(); }
};
which you'd use like
void foo3()
{
CallTracer tracer;
std::cout
<< "foo3, at call level " << CallTracer::level()
<< std::endl;
}
This counts the calls of functions instrumented this way; if that's not
enough, use a decent debugger.
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