Re: [Valgrind-developers] Macro for starting a tool at any user defined point

[Julian S. <js...@ac...>]

Sorry, no silver bullet.  For memcheck/addrcheck/helgrind, Valgrind
needs a complete picture of the state of memory, and that can only
be achieved by running the program right from the start.  

For cachegrind, in principle it would be possible to start collecting
data part way through the run.  That would give you some misleading
cache-cold-start effects, but it would work in general.  However, we
have no mechanism to achieve that at present.

J



On Wednesday 20 April 2005 14:49, Rex Walburn wrote:
> Hi All
>
> I wanted to know if there exists a macro such that, I can insert it in
> my source code and the valgrind tool (like memcheck) will check for
> memory errors or other cache misses only from that point onwards. For
> example, if I can insert a macro like VALGRIND_TOOL_START and
> VALGRIND_TOOL_END in 2 areas in my source code, then the tool like
> memcheck or cachegrind will do their checking and stuff only for that
> part of the code that lies between the two macros. Do these macros
> exist? If not, can I write them using the VALGRIND_MAGIC_SEQUENCE
> macro, or will I have to do something tricky ?
>
> Thanks.