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Running valgrind on foreground programs is easy. But will valgrind work for daemon programs and give the output after it executes. And how do I do that? Thanks
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Note: Valgrind is Linux only. If you aren't running Linux, or want a tool designed from the start to make debugging segfaults and memory issues easier, check out Cee Studio, a fully online C and C++ development environment from our sponsor.
Valgrind uses dynamic binary instrumentation, so you don't need to modify, recompile or relink your applications. Just prefix your command line with valgrind and everything works.
Valgrind (/ˈvælɡrɪnd/) is a programming tool for memory debugging, memory leak detection, and profiling. Valgrind was originally designed to be a free memory debugging tool for Linux on x86, but has since evolved to become a generic framework for creating dynamic analysis tools such as checkers and profilers.
Yes, valgrind will certainly work for daemon programs.
Many daemons have some sort of debug mode, for example the -X switch to apache, which will cause them not to fork or go into the background, and in that case the easiest way to valgrind them may be by using that mode so that they stay attached to the terminal.
In other cases you will still be able to use valgrind, but you will probably want to use --log-file or one of the other logging options to send the output to a suitable location, and you may also need --trace-children to cause valgrind to follow child processes when the daemon forks.
Output, such as memory leak reports, which is only produced when the program ends, should appear as normal when the daemon is shutdown.
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