Re: exceptions and resource deallocation
on Tue Jul 29 2008, Vasilis <VASILI3000-AT-hotmail.com> wrote:
Dear list,
I have problems understanding what exactly goes on during stack
unwinding and resource deallocation. Here is my sample code:
#include <memory>
class exception{};
class dummy{};
void f ( int a ) {
if ( a == 7 )
throw exception();
}
int main() {
std::auto_ptr<dummy> temp( new dummy() );
f ( 7 );
return 1;
}
//sample code end
Now, i must admit, with great surprise, feeding this to valgrind, i
get back a byte leaked, besides a mysterious error that has to do with
the exception throwing itself:
The rules say that if you let an exception escape your program without
catching it, the compiler is allowed (but not required) to skip
unwinding and any associated destructors. That's what's happening to
you.
HTH,
--
Dave Abrahams
BoostPro Computing
http://www.boostpro.com
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
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