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Question about C Programming.

Hi,

I would like to know how can I get the function name of the caller in c?.

Like
// c code

void foo(void)
{

bar();
}

void bar(void)
{
  // who is my caller?
}

I don't want to change the caller function code to add arguments etc.   Even  I don't have access to the caller function source code.

Thanks for your help.

--
--,
BR,
Ravi Sankar Guntur.