Re: [Valgrind-users] Running massif on code with custom allocator with non-malloc-like API

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

On Thu, 2013-10-31 at 14:06 +0400, Konstantin Tokarev wrote:
> Hi all,
> 
> I'm trying to use massif to analyze memory usage of WebKit. I build it without embedded tcmalloc, so 
> "normal" heap allocations are traced by massif. However, its JavaScript engine still uses separate 
> mmap-based heap. How can I trace allocations made in this heap with massif? API is not malloc-like, 
> so I guess I need to write some code to get this functions replaced in Valgrind.
> 
> P.S. I've tried --pages-as-heap=yes to trace mmap directly, but results were completely garbage.
> 
massif supports the client requests VALGRIND_MALLOCLIKE_BLOCK,
VALGRIND_RESIZEINPLACE_BLOCK and  VALGRIND_FREELIKE_BLOCK.
Inserting calls to these inside the JavaScript engine where it
allocates, re-allocates and frees blocks should allow to describe
memory usage by the JavaScript engine.

Pḧilippe