Re: [Valgrind-developers] Question about function interception in valgrind

[Philippe W. <phi...@sk...>]

On Tue, 2013-03-05 at 03:16 +0800, Lu Mitnick wrote:
> Hello everyone,
> 
> 
> I am new to valgrind and wanna to know the mechanism of function
> interception. Valgrind  online documentation mentioned the function
> interception is implemented via dynamic loader(dlopen/dlsym). I am
> curious about whether the mechanism works well or not when the
> instrumented program is static linked. 
You can intercept statically linked functions. I also think 
that the interception functions can also be part of the statically
linked main executable.

However, the tools and core Valgrind replacement definitions are in
shared objects, which I believe are only properly handled if the dynamic
loader is activated.

For implementation, see include/pub_tool_redir.h,
coregrind/pub_core_redir.h and coregrind/m_redir.c.

Philippe