Stack Trace [modified]

[baerten]

Hello everybody, is it possible to determine at realtime the function which has called the current function? Example

void A(void)
{
DoWork();
}

void B(void)
{
DoWork();
}

void DoWork(void)
{
char *trace = GetTraceOf5LastFunction();
OutputDebugString("DoWork called from function : ");
OutputDebugString(trace);
}

Is it possible? Big thanks for any help :) Edit: I have found a fonction called "backtrace" which is placed into execinfo.h But i don't have a such header-file on my system (Visual Studio)

modified on Tuesday, January 27, 2009 6:26 AM

[Hamid Taebi]

Can you use of dll's you can load your functions of dll on the current function.

Of one Essence is the human race thus has Creation put the base One Limb impacted is sufficient For all Others to feel the Mace (Saadi )

[baerten]

Is there a DLL which executes the work of backtracing?

[Luc Pattyn]

Hi, the easiest way may well be the low-tech one: add a string parameter to the function, and pass the caller's name. That works no matter what. DoWork("A"); :)

Luc Pattyn [Forum Guidelines] [My Articles]

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modified on Tuesday, January 27, 2009 8:10 AM

[baerten]

This method is the simplest, but i can't write over 100 Debug-Lines into the code :-) But thanks anyway ;)

[Stuart Dootson]

You need a stack walking function. Here are some[^] links[^] that may be useful. The second is probably best - John Robbins is a well regarded expert on debugging and things like that. His SUPERASSERT code includes stack tracing code - see the dialog screenshot about half way through the article for an example of what you can get. Obviously you only need the last item in the trace. One last thing - IIRC, without debug symbols, all you're going to get is the address that called you, not a function name.

[Lost User]

Hi baerten, I agree with Luc. However you may be able to use a pre-defined macro[^] something like below:VOID FunctionB(int iVal,char *caller,int line) { char szBuf[MAX_PATH]; sprintf(szBuf,"I was called by %s on line %d",caller,line); MessageBoxA(NULL,szBuf,0,0); } VOID FunctionA() { FunctionB(1,__FUNCTION__,__LINE__); }

baerten wrote:

i can't write over 100 Debug-Lines into the code

A stack trace is several times more expensive at runtime. Best Wishes, -David Delaune